SERVER-33259 add libunwind to third_party

808 files changed, 130729 insertions, 100 deletions

diff --git a/SConstruct b/SConstruct
index 7c2d37d6150..9014f109adf 100644
--- a/SConstruct
+++ b/SConstruct
@@ -325,94 +325,40 @@ add_option('use-sasl-client',
     nargs=0,
 )
 
-add_option('use-system-tcmalloc',
-    help='use system version of tcmalloc library',
-    nargs=0,
-)
-
-add_option('use-system-fmt',
-    help='use system version of fmt library',
-    nargs=0,
-)
-
-add_option('use-system-pcre',
-    help='use system version of pcre library',
-    nargs=0,
-)
-
-add_option('use-system-wiredtiger',
-    help='use system version of wiredtiger library',
-    nargs=0,
-)
+# Most of the "use-system-*" options follow a simple form.
+for pack in [
+    ('abseil-cpp',),
+    ('asio', 'ASIO',),
+    ('boost',),
+    ('fmt',),
+    ('google-benchmark', 'Google benchmark'),
+    ('icu', 'ICU'),
+    ('intel_decimal128', 'intel decimal128'),
+    ('kms-message',),
+    ('pcre',),
+    ('snappy',),
+    ('sqlite',),
+    ('stemmer',),
+    ('tcmalloc',),
+    ('unwind',),
+    ('valgrind',),
+    ('wiredtiger',),
+    ('yaml',),
+    ('zlib',),
+    ('zstd', 'Zstandard'),
+    ]:
+    name = pack[0]
+    pretty = name
+    if len(pack) == 2:
+        pretty = pack[1]
+    add_option(f'use-system-{name}',
+               help=f'use system version of {pretty} library',
+               nargs=0)
 
 add_option('system-boost-lib-search-suffixes',
     help='Comma delimited sequence of boost library suffixes to search',
 )
 
-add_option('use-system-abseil-cpp',
-    help='use system version of abseil-cpp libraries',
-    nargs=0,
-)
-
-add_option('use-system-boost',
-    help='use system version of boost libraries',
-    nargs=0,
-)
-
-add_option('use-system-snappy',
-    help='use system version of snappy library',
-    nargs=0,
-)
-
-add_option('use-system-valgrind',
-    help='use system version of valgrind library',
-    nargs=0,
-)
-
-add_option('use-system-google-benchmark',
-    help='use system version of Google benchmark library',
-    nargs=0,
-)
-
-add_option('use-system-zlib',
-    help='use system version of zlib library',
-    nargs=0,
-)
-
-add_option('use-system-zstd',
-    help="use system version of Zstandard library",
-    nargs=0,
-)
-
-add_option('use-system-sqlite',
-    help='use system version of sqlite library',
-    nargs=0,
-)
-
-add_option('use-system-stemmer',
-    help='use system version of stemmer',
-    nargs=0)
-
-add_option('use-system-yaml',
-    help='use system version of yaml',
-    nargs=0,
-)
-
-add_option('use-system-asio',
-    help="use system version of ASIO",
-    nargs=0,
-)
-
-add_option('use-system-icu',
-    help="use system version of ICU",
-    nargs=0,
-)
-
-add_option('use-system-intel_decimal128',
-    help='use system version of intel decimal128',
-    nargs=0,
-)
-
 add_option('use-system-mongo-c',
     choices=['on', 'off', 'auto'],
     const='on',
@@ -422,11 +368,6 @@ add_option('use-system-mongo-c',
     type='choice',
 )
 
-add_option('use-system-kms-message',
-    help='use system version of kms-message library',
-    nargs=0,
-)
-
 add_option('use-system-all',
     help='use all system libraries',
     nargs=0,
@@ -3299,6 +3240,9 @@ def doConfigure(myenv):
     if use_system_version_of_library("fmt"):
         conf.FindSysLibDep("fmt", ["fmt"])
 
+    if use_system_version_of_library("unwind"):
+        conf.FindSysLibDep("unwind", ["unwind"])
+
     if use_system_version_of_library("intel_decimal128"):
         conf.FindSysLibDep("intel_decimal128", ["bid"])
 
diff --git a/src/mongo/base/SConscript b/src/mongo/base/SConscript
index 7929eb27bfc..dd9f19eb95b 100644
--- a/src/mongo/base/SConscript
+++ b/src/mongo/base/SConscript
@@ -105,3 +105,19 @@ env.CppUnitTest(
         'system_error',
     ],
 )
+
+# To be enabled by a '--enable-libunwind' option coming soon.
+if False:
+    unwindTestEnv = env.Clone()
+    unwindTestEnv.InjectThirdParty(libraries=['unwind'])
+    unwindTestEnv.CppUnitTest(
+        target=[
+            'unwind_test',
+        ],
+        source=[
+            'unwind_test.cpp',
+        ],
+        LIBDEPS=[
+            '$BUILD_DIR/third_party/shim_unwind',
+        ]
+    )
diff --git a/src/mongo/base/unwind_test.cpp b/src/mongo/base/unwind_test.cpp
new file mode 100644
index 00000000000..2e64a586889
--- /dev/null
+++ b/src/mongo/base/unwind_test.cpp
@@ -0,0 +1,133 @@
+/**
+ *    Copyright (C) 2018-present MongoDB, Inc.
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the Server Side Public License, version 1,
+ *    as published by MongoDB, Inc.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    Server Side Public License for more details.
+ *
+ *    You should have received a copy of the Server Side Public License
+ *    along with this program. If not, see
+ *    <http://www.mongodb.com/licensing/server-side-public-license>.
+ *
+ *    As a special exception, the copyright holders give permission to link the
+ *    code of portions of this program with the OpenSSL library under certain
+ *    conditions as described in each individual source file and distribute
+ *    linked combinations including the program with the OpenSSL library. You
+ *    must comply with the Server Side Public License in all respects for
+ *    all of the code used other than as permitted herein. If you modify file(s)
+ *    with this exception, you may extend this exception to your version of the
+ *    file(s), but you are not obligated to do so. If you do not wish to do so,
+ *    delete this exception statement from your version. If you delete this
+ *    exception statement from all source files in the program, then also delete
+ *    it in the license file.
+ */
+
+#include "mongo/platform/basic.h"
+
+#include <cstdio>
+#include <cstdlib>
+#include <cxxabi.h>
+#include <sstream>
+
+#include <fmt/format.h>
+#include <fmt/printf.h>
+
+#include <libunwind.h>
+
+#include "mongo/stdx/functional.h"
+#include "mongo/unittest/unittest.h"
+#include "mongo/util/if_constexpr.h"
+
+namespace mongo {
+
+// Must be a named namespace so the functions we want to unwind through have external linkage.
+// Without that, the compiler optimizes them away.
+namespace unwind_test_detail {
+
+using namespace fmt::literals;
+
+std::string trace() {
+    std::string out;
+    unw_cursor_t cursor;
+    unw_context_t context;
+
+    // Initialize cursor to current frame for local unwinding.
+    unw_getcontext(&context);
+    unw_init_local(&cursor, &context);
+    // Unwind frames one by one, going up the frame stack.
+    while (unw_step(&cursor) > 0) {
+        unw_word_t offset, pc;
+        unw_get_reg(&cursor, UNW_REG_IP, &pc);
+        if (pc == 0) {
+            break;
+        }
+        out += "0x{:x}:"_format(pc);
+        char sym[32 << 10];
+        char* name = sym;
+        int err;
+        if ((err = unw_get_proc_name(&cursor, sym, sizeof(sym), &offset)) != 0) {
+            out += " -- error: unable to obtain symbol name for this frame: {:d}\n"_format(err);
+            continue;
+        }
+        name = sym;
+        int status;
+        char* demangled_name;
+        if ((demangled_name = abi::__cxa_demangle(sym, nullptr, nullptr, &status))) {
+            name = demangled_name;
+        }
+        out += " ({:s}+0x{:x})\n"_format(name, offset);
+        if (name != sym) {
+            free(name);  // allocated by abi::__cxa_demangle
+        }
+    }
+    return out;
+}
+
+struct Context {
+    std::vector<stdx::function<void(Context&)>> plan;
+    std::string s;
+};
+
+// Disable clang-format for the "if constexpr"
+template <int N>
+void callNext(Context& ctx) {
+    IF_CONSTEXPR (N == 0) {
+        ctx.s = trace();
+    } else {
+        ctx.plan[N - 1](ctx);
+    }
+    // Forces compiler to invoke next plan with `call` instead of `jmp`.
+    asm volatile("");  // NOLINT
+}
+
+TEST(Unwind, Demangled) {
+    // Trickery with std::vector<stdx::function> is to hide from the optimizer.
+    Context ctx{{
+        callNext<0>, callNext<1>, callNext<2>, callNext<3>, callNext<4>, callNext<5>,
+    }};
+    ctx.plan.back()(ctx);
+    // Check that these function names appear in the trace, in order.
+    // There will of course be characters between them but ignore that.
+    const std::string frames[] = {
+        "void mongo::unwind_test_detail::callNext<0>(mongo::unwind_test_detail::Context&)",
+        "void mongo::unwind_test_detail::callNext<1>(mongo::unwind_test_detail::Context&)",
+        "void mongo::unwind_test_detail::callNext<2>(mongo::unwind_test_detail::Context&)",
+        "void mongo::unwind_test_detail::callNext<3>(mongo::unwind_test_detail::Context&)",
+        "void mongo::unwind_test_detail::callNext<4>(mongo::unwind_test_detail::Context&)",
+        "void mongo::unwind_test_detail::callNext<5>(mongo::unwind_test_detail::Context&)",
+        "main",
+    };
+    size_t pos = 0;
+    for (const auto& expected : frames) {
+        pos = ctx.s.find(expected, pos);
+        ASSERT_NE(pos, ctx.s.npos) << ctx.s;
+    }
+}
+
+}  // namespace unwind_test_detail
+}  // namespace mongo
diff --git a/src/third_party/SConscript b/src/third_party/SConscript
index a8156db6661..d2969b60cbd 100644
--- a/src/third_party/SConscript
+++ b/src/third_party/SConscript
@@ -1,6 +1,7 @@
 # -*- mode: python -*-
 
 import libdeps
+import json
 
 Import("env use_system_version_of_library usemozjs get_option")
 Import("wiredtiger")
@@ -34,7 +35,9 @@ thirdPartyEnvironmentModifications = {
    },
    'timelib' : {
         'CPPPATH' : ['#/src/third_party/timelib' + timelibSuffix],
-   }
+   },
+   'unwind' : {
+   },
 }
 
 def injectMozJS(thisEnv):
@@ -209,6 +212,38 @@ s2Env.InjectThirdParty(libraries=['s2', 'boost', 'abseil-cpp', 'fmt', 'safeint']
 s2Env.InjectMongoIncludePaths()
 s2Env.SConscript('s2/SConscript', exports={'env' : s2Env})
 
+unwindEnv = None
+if use_system_version_of_library("unwind"):
+    unwindEnv = env.Clone(
+        SYSLIBDEPS=[
+            env['LIBDEPS_UNWIND_SYSLIBDEP'],
+        ])
+else:
+    unwindEnv = env.Clone()
+    unwindEnv.InjectThirdParty(libraries=['unwind'])
+    unwindEnv.InjectMongoIncludePaths()
+
+    def registerConsumerModifications(env, **kwargs):
+        for k,v in kwargs.items():
+            thirdPartyEnvironmentModifications['unwind'][k] = v
+
+    unwindEnv.AddMethod(registerConsumerModifications, 'RegisterConsumerModifications')
+    unwindEnv.SConscript('unwind/SConscript', exports={'env' : unwindEnv})
+
+    print("third_party/unwind modifications:",
+          ",".join(thirdPartyEnvironmentModifications['unwind'].keys()))
+
+    unwindEnv = unwindEnv.Clone(
+        LIBDEPS_INTERFACE=[
+            'unwind/unwind',
+        ])
+
+unwindEnv.Library(
+    target="shim_unwind",
+    source=[
+        'shim_unwind.cpp',
+    ])
+
 
 if use_system_version_of_library("fmt"):
     fmtEnv = env.Clone(
@@ -436,14 +471,13 @@ if gperftoolsEnv['MONGO_ALLOCATOR'] in ["tcmalloc", "tcmalloc-experimental"]:
         gperftoolsEnv.InjectThirdParty(libraries=['gperftools'])
         # Allow gperftools to determine its own consumer-side include/ dirs.
         # Needed because those are in a platform-specific subdirectory.
-        mods = {}
+        def registerConsumerModifications(env, **kwargs):
+            for k,v in kwargs.items():
+                thirdPartyEnvironmentModifications['gperftools'][k] = v
+        gperftoolsEnv.AddMethod(registerConsumerModifications, 'RegisterConsumerModifications')
         gperftoolsEnv.SConscript(
             'gperftools' + gperftoolsSuffix + '/SConscript',
-            exports={'env' : gperftoolsEnv, 'consumerMods' : mods})
-        # Propagate settings that were deposited into 'mods' by gperftools' SConscript.
-        for k,v in mods.items():
-            thirdPartyEnvironmentModifications['gperftools'][k] = v
-
+            exports={'env' : gperftoolsEnv})
         gperftoolsEnv = gperftoolsEnv.Clone(
             LIBDEPS_INTERFACE=[
                 'gperftools' + gperftoolsSuffix + '/tcmalloc_minimal',
diff --git a/src/third_party/gperftools-2.7/SConscript b/src/third_party/gperftools-2.7/SConscript
index c905f72c0c1..cb5683c63dc 100644
--- a/src/third_party/gperftools-2.7/SConscript
+++ b/src/third_party/gperftools-2.7/SConscript
@@ -3,7 +3,6 @@
 Import("env")
 Import("has_option")
 Import("debugBuild")
-Import("consumerMods")
 
 env = env.Clone()
 
@@ -96,11 +95,14 @@ if not debugBuild:
 if (not debugBuild) or (not env['TARGET_ARCH'] in ['x86_64', 'i386']):
     env.Append(CPPDEFINES=["NO_TCMALLOC_SAMPLES"])
 
-env.Append(CPPPATH=["platform/${TARGET_OS}_${TARGET_ARCH}/internal/src",
-                    "dist/src"])
+gperftools_root = env.Dir("#/src/third_party/gperftools-2.7")
+gperftools_platform = gperftools_root.Dir("platform/${TARGET_OS}_${TARGET_ARCH}")
 
-# 'consumerMods' propagates to consumers that Inject (depend on) gperftools.
-consumerMods['CPPPATH'] = "#/src/third_party/gperftools-2.7/platform/${TARGET_OS}_${TARGET_ARCH}/include"
+env.Append(CPPPATH=[gperftools_platform.Dir("internal/src"),
+                    gperftools_root.Dir("dist/src")])
+
+# propagates to consumers that Inject (depend on) gperftools.
+env.RegisterConsumerModifications(CPPPATH=[gperftools_platform.Dir("include")])
 
 def removeIfPresent(lst, item):
     try:
diff --git a/src/third_party/shim_unwind.cpp b/src/third_party/shim_unwind.cpp
new file mode 100644
index 00000000000..cf14d893fff
--- /dev/null
+++ b/src/third_party/shim_unwind.cpp
@@ -0,0 +1,3 @@
+// This file intentionally blank.  shim_unwind.cpp is part of the
+// third_party/unwind library, which is just a placeholder for forwarding
+// library dependencies.
diff --git a/src/third_party/unwind/SConscript b/src/third_party/unwind/SConscript
new file mode 100644
index 00000000000..dd205b19b49
--- /dev/null
+++ b/src/third_party/unwind/SConscript
@@ -0,0 +1,135 @@
+# -*- mode: python -*-
+
+Import("env")
+Import("has_option")
+Import("debugBuild")
+
+# https://www.nongnu.org/libunwind/man/libunwind(3).html#section_1
+# For local unwinding (introspection, which is all we want), include
+# libunwind.h and link with '-lunwind'. We only need to build enough
+# for that to work.
+#
+# Limited to linux_x86_64 right now.
+
+env = env.Clone()
+
+unwind_root = env.Dir(".").srcnode()
+unwind_platform = unwind_root.Dir("platform/${TARGET_OS}_${TARGET_ARCH}")
+unwind_src_dir = env.Dir("dist/src")
+
+unwind_sources = [
+    'mi/backtrace.c',
+    'mi/dyn-cancel.c',
+    'mi/dyn-info-list.c',
+    'mi/dyn-register.c',
+    'mi/flush_cache.c',
+    'mi/init.c',
+    'mi/Ldestroy_addr_space.c',
+    'mi/Ldyn-extract.c',
+    'mi/Lfind_dynamic_proc_info.c',
+    'mi/Lget_accessors.c',
+    'mi/Lget_fpreg.c',
+    'mi/Lget_proc_info_by_ip.c',
+    'mi/Lget_proc_name.c',
+    'mi/Lget_reg.c',
+    'mi/Lput_dynamic_unwind_info.c',
+    'mi/Lset_cache_size.c',
+    'mi/Lset_caching_policy.c',
+    'mi/Lset_fpreg.c',
+    'mi/Lset_reg.c',
+    'mi/mempool.c',
+    'mi/_ReadSLEB.c',
+    'mi/_ReadULEB.c',
+    'mi/strerror.c',
+    'os-linux.c',
+    'unwind/Backtrace.c',
+    'unwind/DeleteException.c',
+    'unwind/FindEnclosingFunction.c',
+    'unwind/ForcedUnwind.c',
+    'unwind/GetBSP.c',
+    'unwind/GetCFA.c',
+    'unwind/GetDataRelBase.c',
+    'unwind/GetGR.c',
+    'unwind/GetIP.c',
+    'unwind/GetIPInfo.c',
+    'unwind/GetLanguageSpecificData.c',
+    'unwind/GetRegionStart.c',
+    'unwind/GetTextRelBase.c',
+    'unwind/RaiseException.c',
+    'unwind/Resume.c',
+    'unwind/Resume_or_Rethrow.c',
+    'unwind/SetGR.c',
+    'unwind/SetIP.c',
+    #
+    # x86_64
+    'x86_64/is_fpreg.c',
+    'x86_64/Lapply_reg_state.c',
+    'x86_64/Lcreate_addr_space.c',
+    'x86_64/Lget_proc_info.c',
+    'x86_64/Lget_save_loc.c',
+    'x86_64/Lglobal.c',
+    'x86_64/Linit.c',
+    'x86_64/Linit_local.c',
+    'x86_64/Linit_remote.c',
+    'x86_64/Los-linux.c',
+    'x86_64/Lregs.c',
+    'x86_64/Lreg_states_iterate.c',
+    'x86_64/Lresume.c',
+    'x86_64/Lstash_frame.c',
+    'x86_64/Lstep.c',
+    'x86_64/Ltrace.c',
+    'x86_64/regname.c',
+    'x86_64/getcontext.S',
+    'x86_64/setcontext.S',
+    #
+    # orig in unwind-elf64
+    'elf64.c',
+    #
+    # orig in unwind-dwarf-local
+    'dwarf/Lexpr.c',
+    'dwarf/Lfde.c',
+    'dwarf/Lfind_proc_info-lsb.c',
+    'dwarf/Lfind_unwind_table.c',
+    'dwarf/Lparser.c',
+    'dwarf/Lpe.c',
+    #
+    # orig in unwind-dwarf-common
+    'dwarf/global.c',
+]
+
+env.Append(
+    CCFLAGS=[
+        '-fexceptions',
+        '-Wno-unused-result',
+    ])
+
+if env.ToolchainIs('clang'):
+    env.Append(CCFLAGS=['-Wno-header-guard'])
+
+env.Append(
+    CPPPATH=[
+        unwind_platform.Dir("build/include"),
+        unwind_root.Dir("dist/src"),
+        unwind_root.Dir("dist/include"),
+        unwind_root.Dir("dist/include/tdep-${TARGET_ARCH}"),
+    ])
+
+# propagates to consumers that Inject (depend on) unwind.
+env.RegisterConsumerModifications(
+    CPPPATH=[unwind_platform.Dir("install/include")],
+    CPPDEFINES=['UNW_LOCAL_ONLY'],
+    LIBS=['lzma'])
+
+env.Append(
+    LIBS=['lzma'])
+
+env.Append(
+    CPPDEFINES=[
+        'HAVE_CONFIG_H',
+        '_GNU_SOURCE',
+    ])
+
+unwind_sources_files = [unwind_src_dir.File(f) for f in unwind_sources]
+env.Library(
+    target='unwind',
+    source=unwind_sources_files)
diff --git a/src/third_party/unwind/dist/AUTHORS b/src/third_party/unwind/dist/AUTHORS
new file mode 100644
index 00000000000..719eee5c85a
--- /dev/null
+++ b/src/third_party/unwind/dist/AUTHORS
@@ -0,0 +1 @@
+David Mosberger <dmosberger@gmail.org>
diff --git a/src/third_party/unwind/dist/COPYING b/src/third_party/unwind/dist/COPYING
new file mode 100644
index 00000000000..41e7d8a6fdb
--- /dev/null
+++ b/src/third_party/unwind/dist/COPYING
@@ -0,0 +1,20 @@
+Copyright (c) 2002 Hewlett-Packard Co.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/src/third_party/unwind/dist/ChangeLog b/src/third_party/unwind/dist/ChangeLog
new file mode 100644
index 00000000000..dfa24b957cb
--- /dev/null
+++ b/src/third_party/unwind/dist/ChangeLog
@@ -0,0 +1,55 @@
+***********************************************************
+
+ Discontinued.  See git log instead at
+
+   http://www.kernel.org/git/gitweb.cgi?p=libs/libunwind/libunwind.git;a=log
+
+***********************************************************
+
+2002-11-08  David Mosberger-Tang  <David.Mosberger@acm.org>
+
+	* src/ia64/unwind_i.h (ia64_getfp): Change from macro to inline
+	function.  Check "loc" argument for being NULL before dereferencing it.
+	(ia64_putfp): Ditto.
+	(ia64_get): Ditto.
+	(ia64_put): Ditto.
+
+2002-01-18  David Mosberger-Tang  <David.Mosberger@acm.org>
+
+	* src/ia64/parser.c (__ia64_unw_create_state_record): Set
+	IA64_FLAG_HAS_HANDLER if the unwind info descriptors indicate that
+	there a handler.
+
+	* src/ia64/regs.c (__ia64_access_reg): Return zero for UNW_REG_HANDLER
+	in frames that don't have a personality routine.
+
+	* src/ia64/unwind_i.h (IA64_FLAG_HAS_HANDLER): New flag.
+
+	* src/ia64/regs.c (__ia64_access_reg): When reading UNW_REG_HANDLER,
+	account for the fact that the personality address is gp-relative.
+
+	* src/ia64/parser.c (__ia64_unw_create_state_record): Fix
+	initialization of segbase and len.
+
+2002-01-17  David Mosberger-Tang  <David.Mosberger@acm.org>
+
+	* include/unwind-ia64.h: Include via "unwind.h" to ensure
+	the file is picked up from same directory.
+
+2002-01-16  David Mosberger-Tang  <David.Mosberger@acm.org>
+
+	* include/unwind.h: Define UNW_ESTOPUNWIND.  This error code may
+	be returned by acquire_unwind_info() to force termination of
+	unwinding.  An application may want to do this when encountering a
+	call frame for dynamically generated code, for example.
+
+	* unwind.h: Pass opaque argument pointer to acquire_unwind_info()
+	and release_unwind_info() like we do for access_mem() etc.
+
+2002-01-14  David Mosberger-Tang  <David.Mosberger@acm.org>
+
+	* Version 0.0 released.
+
+2002-01-11  David Mosberger-Tang  <David.Mosberger@acm.org>
+
+	* ChangeLog created.
diff --git a/src/third_party/unwind/dist/INSTALL b/src/third_party/unwind/dist/INSTALL
new file mode 100644
index 00000000000..8865734f81b
--- /dev/null
+++ b/src/third_party/unwind/dist/INSTALL
@@ -0,0 +1,368 @@
+Installation Instructions
+*************************
+
+   Copyright (C) 1994-1996, 1999-2002, 2004-2016 Free Software
+Foundation, Inc.
+
+   Copying and distribution of this file, with or without modification,
+are permitted in any medium without royalty provided the copyright
+notice and this notice are preserved.  This file is offered as-is,
+without warranty of any kind.
+
+Basic Installation
+==================
+
+   Briefly, the shell command './configure && make && make install'
+should configure, build, and install this package.  The following
+more-detailed instructions are generic; see the 'README' file for
+instructions specific to this package.  Some packages provide this
+'INSTALL' file but do not implement all of the features documented
+below.  The lack of an optional feature in a given package is not
+necessarily a bug.  More recommendations for GNU packages can be found
+in *note Makefile Conventions: (standards)Makefile Conventions.
+
+   The 'configure' shell script attempts to guess correct values for
+various system-dependent variables used during compilation.  It uses
+those values to create a 'Makefile' in each directory of the package.
+It may also create one or more '.h' files containing system-dependent
+definitions.  Finally, it creates a shell script 'config.status' that
+you can run in the future to recreate the current configuration, and a
+file 'config.log' containing compiler output (useful mainly for
+debugging 'configure').
+
+   It can also use an optional file (typically called 'config.cache' and
+enabled with '--cache-file=config.cache' or simply '-C') that saves the
+results of its tests to speed up reconfiguring.  Caching is disabled by
+default to prevent problems with accidental use of stale cache files.
+
+   If you need to do unusual things to compile the package, please try
+to figure out how 'configure' could check whether to do them, and mail
+diffs or instructions to the address given in the 'README' so they can
+be considered for the next release.  If you are using the cache, and at
+some point 'config.cache' contains results you don't want to keep, you
+may remove or edit it.
+
+   The file 'configure.ac' (or 'configure.in') is used to create
+'configure' by a program called 'autoconf'.  You need 'configure.ac' if
+you want to change it or regenerate 'configure' using a newer version of
+'autoconf'.
+
+   The simplest way to compile this package is:
+
+  1. 'cd' to the directory containing the package's source code and type
+     './configure' to configure the package for your system.
+
+     Running 'configure' might take a while.  While running, it prints
+     some messages telling which features it is checking for.
+
+  2. Type 'make' to compile the package.
+
+  3. Optionally, type 'make check' to run any self-tests that come with
+     the package, generally using the just-built uninstalled binaries.
+
+  4. Type 'make install' to install the programs and any data files and
+     documentation.  When installing into a prefix owned by root, it is
+     recommended that the package be configured and built as a regular
+     user, and only the 'make install' phase executed with root
+     privileges.
+
+  5. Optionally, type 'make installcheck' to repeat any self-tests, but
+     this time using the binaries in their final installed location.
+     This target does not install anything.  Running this target as a
+     regular user, particularly if the prior 'make install' required
+     root privileges, verifies that the installation completed
+     correctly.
+
+  6. You can remove the program binaries and object files from the
+     source code directory by typing 'make clean'.  To also remove the
+     files that 'configure' created (so you can compile the package for
+     a different kind of computer), type 'make distclean'.  There is
+     also a 'make maintainer-clean' target, but that is intended mainly
+     for the package's developers.  If you use it, you may have to get
+     all sorts of other programs in order to regenerate files that came
+     with the distribution.
+
+  7. Often, you can also type 'make uninstall' to remove the installed
+     files again.  In practice, not all packages have tested that
+     uninstallation works correctly, even though it is required by the
+     GNU Coding Standards.
+
+  8. Some packages, particularly those that use Automake, provide 'make
+     distcheck', which can by used by developers to test that all other
+     targets like 'make install' and 'make uninstall' work correctly.
+     This target is generally not run by end users.
+
+Compilers and Options
+=====================
+
+   Some systems require unusual options for compilation or linking that
+the 'configure' script does not know about.  Run './configure --help'
+for details on some of the pertinent environment variables.
+
+   You can give 'configure' initial values for configuration parameters
+by setting variables in the command line or in the environment.  Here is
+an example:
+
+     ./configure CC=c99 CFLAGS=-g LIBS=-lposix
+
+   *Note Defining Variables::, for more details.
+
+Compiling For Multiple Architectures
+====================================
+
+   You can compile the package for more than one kind of computer at the
+same time, by placing the object files for each architecture in their
+own directory.  To do this, you can use GNU 'make'.  'cd' to the
+directory where you want the object files and executables to go and run
+the 'configure' script.  'configure' automatically checks for the source
+code in the directory that 'configure' is in and in '..'.  This is known
+as a "VPATH" build.
+
+   With a non-GNU 'make', it is safer to compile the package for one
+architecture at a time in the source code directory.  After you have
+installed the package for one architecture, use 'make distclean' before
+reconfiguring for another architecture.
+
+   On MacOS X 10.5 and later systems, you can create libraries and
+executables that work on multiple system types--known as "fat" or
+"universal" binaries--by specifying multiple '-arch' options to the
+compiler but only a single '-arch' option to the preprocessor.  Like
+this:
+
+     ./configure CC="gcc -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
+                 CXX="g++ -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
+                 CPP="gcc -E" CXXCPP="g++ -E"
+
+   This is not guaranteed to produce working output in all cases, you
+may have to build one architecture at a time and combine the results
+using the 'lipo' tool if you have problems.
+
+Installation Names
+==================
+
+   By default, 'make install' installs the package's commands under
+'/usr/local/bin', include files under '/usr/local/include', etc.  You
+can specify an installation prefix other than '/usr/local' by giving
+'configure' the option '--prefix=PREFIX', where PREFIX must be an
+absolute file name.
+
+   You can specify separate installation prefixes for
+architecture-specific files and architecture-independent files.  If you
+pass the option '--exec-prefix=PREFIX' to 'configure', the package uses
+PREFIX as the prefix for installing programs and libraries.
+Documentation and other data files still use the regular prefix.
+
+   In addition, if you use an unusual directory layout you can give
+options like '--bindir=DIR' to specify different values for particular
+kinds of files.  Run 'configure --help' for a list of the directories
+you can set and what kinds of files go in them.  In general, the default
+for these options is expressed in terms of '${prefix}', so that
+specifying just '--prefix' will affect all of the other directory
+specifications that were not explicitly provided.
+
+   The most portable way to affect installation locations is to pass the
+correct locations to 'configure'; however, many packages provide one or
+both of the following shortcuts of passing variable assignments to the
+'make install' command line to change installation locations without
+having to reconfigure or recompile.
+
+   The first method involves providing an override variable for each
+affected directory.  For example, 'make install
+prefix=/alternate/directory' will choose an alternate location for all
+directory configuration variables that were expressed in terms of
+'${prefix}'.  Any directories that were specified during 'configure',
+but not in terms of '${prefix}', must each be overridden at install time
+for the entire installation to be relocated.  The approach of makefile
+variable overrides for each directory variable is required by the GNU
+Coding Standards, and ideally causes no recompilation.  However, some
+platforms have known limitations with the semantics of shared libraries
+that end up requiring recompilation when using this method, particularly
+noticeable in packages that use GNU Libtool.
+
+   The second method involves providing the 'DESTDIR' variable.  For
+example, 'make install DESTDIR=/alternate/directory' will prepend
+'/alternate/directory' before all installation names.  The approach of
+'DESTDIR' overrides is not required by the GNU Coding Standards, and
+does not work on platforms that have drive letters.  On the other hand,
+it does better at avoiding recompilation issues, and works well even
+when some directory options were not specified in terms of '${prefix}'
+at 'configure' time.
+
+Optional Features
+=================
+
+   If the package supports it, you can cause programs to be installed
+with an extra prefix or suffix on their names by giving 'configure' the
+option '--program-prefix=PREFIX' or '--program-suffix=SUFFIX'.
+
+   Some packages pay attention to '--enable-FEATURE' options to
+'configure', where FEATURE indicates an optional part of the package.
+They may also pay attention to '--with-PACKAGE' options, where PACKAGE
+is something like 'gnu-as' or 'x' (for the X Window System).  The
+'README' should mention any '--enable-' and '--with-' options that the
+package recognizes.
+
+   For packages that use the X Window System, 'configure' can usually
+find the X include and library files automatically, but if it doesn't,
+you can use the 'configure' options '--x-includes=DIR' and
+'--x-libraries=DIR' to specify their locations.
+
+   Some packages offer the ability to configure how verbose the
+execution of 'make' will be.  For these packages, running './configure
+--enable-silent-rules' sets the default to minimal output, which can be
+overridden with 'make V=1'; while running './configure
+--disable-silent-rules' sets the default to verbose, which can be
+overridden with 'make V=0'.
+
+Particular systems
+==================
+
+   On HP-UX, the default C compiler is not ANSI C compatible.  If GNU CC
+is not installed, it is recommended to use the following options in
+order to use an ANSI C compiler:
+
+     ./configure CC="cc -Ae -D_XOPEN_SOURCE=500"
+
+and if that doesn't work, install pre-built binaries of GCC for HP-UX.
+
+   HP-UX 'make' updates targets which have the same time stamps as their
+prerequisites, which makes it generally unusable when shipped generated
+files such as 'configure' are involved.  Use GNU 'make' instead.
+
+   On OSF/1 a.k.a. Tru64, some versions of the default C compiler cannot
+parse its '<wchar.h>' header file.  The option '-nodtk' can be used as a
+workaround.  If GNU CC is not installed, it is therefore recommended to
+try
+
+     ./configure CC="cc"
+
+and if that doesn't work, try
+
+     ./configure CC="cc -nodtk"
+
+   On Solaris, don't put '/usr/ucb' early in your 'PATH'.  This
+directory contains several dysfunctional programs; working variants of
+these programs are available in '/usr/bin'.  So, if you need '/usr/ucb'
+in your 'PATH', put it _after_ '/usr/bin'.
+
+   On Haiku, software installed for all users goes in '/boot/common',
+not '/usr/local'.  It is recommended to use the following options:
+
+     ./configure --prefix=/boot/common
+
+Specifying the System Type
+==========================
+
+   There may be some features 'configure' cannot figure out
+automatically, but needs to determine by the type of machine the package
+will run on.  Usually, assuming the package is built to be run on the
+_same_ architectures, 'configure' can figure that out, but if it prints
+a message saying it cannot guess the machine type, give it the
+'--build=TYPE' option.  TYPE can either be a short name for the system
+type, such as 'sun4', or a canonical name which has the form:
+
+     CPU-COMPANY-SYSTEM
+
+where SYSTEM can have one of these forms:
+
+     OS
+     KERNEL-OS
+
+   See the file 'config.sub' for the possible values of each field.  If
+'config.sub' isn't included in this package, then this package doesn't
+need to know the machine type.
+
+   If you are _building_ compiler tools for cross-compiling, you should
+use the option '--target=TYPE' to select the type of system they will
+produce code for.
+
+   If you want to _use_ a cross compiler, that generates code for a
+platform different from the build platform, you should specify the
+"host" platform (i.e., that on which the generated programs will
+eventually be run) with '--host=TYPE'.
+
+Sharing Defaults
+================
+
+   If you want to set default values for 'configure' scripts to share,
+you can create a site shell script called 'config.site' that gives
+default values for variables like 'CC', 'cache_file', and 'prefix'.
+'configure' looks for 'PREFIX/share/config.site' if it exists, then
+'PREFIX/etc/config.site' if it exists.  Or, you can set the
+'CONFIG_SITE' environment variable to the location of the site script.
+A warning: not all 'configure' scripts look for a site script.
+
+Defining Variables
+==================
+
+   Variables not defined in a site shell script can be set in the
+environment passed to 'configure'.  However, some packages may run
+configure again during the build, and the customized values of these
+variables may be lost.  In order to avoid this problem, you should set
+them in the 'configure' command line, using 'VAR=value'.  For example:
+
+     ./configure CC=/usr/local2/bin/gcc
+
+causes the specified 'gcc' to be used as the C compiler (unless it is
+overridden in the site shell script).
+
+Unfortunately, this technique does not work for 'CONFIG_SHELL' due to an
+Autoconf limitation.  Until the limitation is lifted, you can use this
+workaround:
+
+     CONFIG_SHELL=/bin/bash ./configure CONFIG_SHELL=/bin/bash
+
+'configure' Invocation
+======================
+
+   'configure' recognizes the following options to control how it
+operates.
+
+'--help'
+'-h'
+     Print a summary of all of the options to 'configure', and exit.
+
+'--help=short'
+'--help=recursive'
+     Print a summary of the options unique to this package's
+     'configure', and exit.  The 'short' variant lists options used only
+     in the top level, while the 'recursive' variant lists options also
+     present in any nested packages.
+
+'--version'
+'-V'
+     Print the version of Autoconf used to generate the 'configure'
+     script, and exit.
+
+'--cache-file=FILE'
+     Enable the cache: use and save the results of the tests in FILE,
+     traditionally 'config.cache'.  FILE defaults to '/dev/null' to
+     disable caching.
+
+'--config-cache'
+'-C'
+     Alias for '--cache-file=config.cache'.
+
+'--quiet'
+'--silent'
+'-q'
+     Do not print messages saying which checks are being made.  To
+     suppress all normal output, redirect it to '/dev/null' (any error
+     messages will still be shown).
+
+'--srcdir=DIR'
+     Look for the package's source code in directory DIR.  Usually
+     'configure' can determine that directory automatically.
+
+'--prefix=DIR'
+     Use DIR as the installation prefix.  *note Installation Names:: for
+     more details, including other options available for fine-tuning the
+     installation locations.
+
+'--no-create'
+'-n'
+     Run the configure checks, but stop before creating any output
+     files.
+
+'configure' also accepts some other, not widely useful, options.  Run
+'configure --help' for more details.
diff --git a/src/third_party/unwind/dist/Makefile.am b/src/third_party/unwind/dist/Makefile.am
new file mode 100644
index 00000000000..8132fa4cb95
--- /dev/null
+++ b/src/third_party/unwind/dist/Makefile.am
@@ -0,0 +1,111 @@
+include_HEADERS = include/libunwind-dynamic.h
+
+if BUILD_PTRACE
+include_HEADERS += include/libunwind-ptrace.h
+endif BUILD_PTRACE
+
+if BUILD_COREDUMP
+include_HEADERS += include/libunwind-coredump.h
+endif BUILD_COREDUMP
+
+if ARCH_AARCH64
+include_HEADERS += include/libunwind-aarch64.h
+endif
+if ARCH_ARM
+include_HEADERS += include/libunwind-arm.h
+endif
+if ARCH_IA64
+include_HEADERS += include/libunwind-ia64.h
+endif
+if ARCH_HPPA
+include_HEADERS += include/libunwind-hppa.h
+endif
+if ARCH_MIPS
+include_HEADERS += include/libunwind-mips.h
+endif
+if ARCH_TILEGX
+include_HEADERS += include/libunwind-tilegx.h
+endif
+if ARCH_X86
+include_HEADERS += include/libunwind-x86.h
+endif
+if ARCH_X86_64
+include_HEADERS += include/libunwind-x86_64.h
+endif
+if ARCH_PPC32
+include_HEADERS += include/libunwind-ppc32.h
+endif
+if ARCH_PPC64
+include_HEADERS += include/libunwind-ppc64.h
+endif
+if ARCH_SH
+include_HEADERS += include/libunwind-sh.h
+endif
+if ARCH_S390X
+include_HEADERS += include/libunwind-s390x.h
+endif
+
+if !REMOTE_ONLY
+include_HEADERS += include/libunwind.h include/unwind.h
+endif
+
+nodist_include_HEADERS = include/libunwind-common.h
+
+SUBDIRS = src
+
+if CONFIG_TESTS
+SUBDIRS += tests
+endif
+
+if CONFIG_DOCS
+SUBDIRS += doc
+endif
+
+noinst_HEADERS = include/dwarf.h include/dwarf_i.h include/dwarf-eh.h	\
+	include/compiler.h include/libunwind_i.h include/mempool.h	\
+	include/remote.h						\
+	include/tdep-aarch64/dwarf-config.h				\
+	include/tdep-aarch64/jmpbuf.h					\
+	include/tdep-aarch64/libunwind_i.h				\
+	include/tdep-arm/dwarf-config.h	include/tdep-arm/ex_tables.h	\
+	include/tdep-arm/jmpbuf.h include/tdep-arm/libunwind_i.h	\
+	include/tdep-ia64/jmpbuf.h include/tdep-ia64/rse.h 		\
+	include/tdep-ia64/libunwind_i.h	include/tdep-ia64/script.h	\
+	include/tdep-hppa/libunwind_i.h					\
+	include/tdep-hppa/jmpbuf.h include/tdep-hppa/dwarf-config.h	\
+	include/tdep-mips/libunwind_i.h					\
+	include/tdep-mips/jmpbuf.h include/tdep-mips/dwarf-config.h	\
+	include/tdep-tilegx/libunwind_i.h				\
+	include/tdep-tilegx/jmpbuf.h include/tdep-tilegx/dwarf-config.h	\
+	include/tdep-x86/libunwind_i.h					\
+	include/tdep-x86/jmpbuf.h include/tdep-x86/dwarf-config.h	\
+	include/tdep-x86_64/libunwind_i.h				\
+	include/tdep-x86_64/jmpbuf.h include/tdep-x86_64/dwarf-config.h \
+	include/tdep-ppc32/dwarf-config.h				\
+	include/tdep-ppc32/jmpbuf.h include/tdep-ppc32/libunwind_i.h	\
+	include/tdep-ppc64/dwarf-config.h				\
+	include/tdep-ppc64/jmpbuf.h include/tdep-ppc64/libunwind_i.h	\
+	include/tdep-sh/dwarf-config.h					\
+	include/tdep-sh/jmpbuf.h include/tdep-sh/libunwind_i.h		\
+	include/tdep-s390x/dwarf-config.h				\
+	include/tdep-s390x/jmpbuf.h include/tdep-s390x/libunwind_i.h	\
+	include/tdep/libunwind_i.h					\
+	include/tdep/jmpbuf.h include/tdep/dwarf-config.h
+
+EXTRA_DIST = include/libunwind-common.h.in
+
+MAINTAINERCLEANFILES = \
+	Makefile.in \
+	INSTALL \
+	aclocal.m4 \
+	configure \
+	config/compile \
+	config/config.guess \
+	config/config.sub \
+	config/depcomp \
+	config/install-sh \
+	config/ltmain.sh \
+	config/missing \
+	include/config.h.in \
+	include/config.h.in~
+
diff --git a/src/third_party/unwind/dist/Makefile.in b/src/third_party/unwind/dist/Makefile.in
new file mode 100644
index 00000000000..dd746457242
--- /dev/null
+++ b/src/third_party/unwind/dist/Makefile.in
@@ -0,0 +1,1025 @@
+# Makefile.in generated by automake 1.15.1 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2017 Free Software Foundation, Inc.
+
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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+  test $$has_opt = yes
+am__make_dryrun = (target_option=n; $(am__make_running_with_option))
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+pkgdatadir = $(datadir)/@PACKAGE@
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diff --git a/src/third_party/unwind/dist/NEWS b/src/third_party/unwind/dist/NEWS
new file mode 100644
index 00000000000..ae6cbcfb0b5
--- /dev/null
+++ b/src/third_party/unwind/dist/NEWS
@@ -0,0 +1,247 @@
+-*-Mode: outline-*-
+
+* News for v1.3:
+
+** Iteration of unwind register states support
+   Doug Moore <dougm@rice.edu>
+** Freebsd/Armv6 support
+   Konstantin Belousov <kib@freebsd.org>
+** Many, many dwarf bugfixes
+** Mips remote unwind support
+** aarch64 ptrace support
+
+* News for v1.2:
+
+** aarch64 port
+** dwarf parsing improvements
+** Fast stacktraces for aarch64 & arm
+** tilegx port
+** powerpc64 port
+
+* News for v1.1:
+
+** coredump unwind support
+** New arch: SuperH
+** Improved support for PowerPC, ARM
+** Lots of cleanups, perf tweaks
+** pkg-config support
+
+* News for v1.0:
+
+** Fast unwind (rbp, rsp, rip only) on x86_64 with a fallback to 
+   slow code path (Lassi Tuura)
+** Improved local and remote unwinding on ARM (Ken Werner)
+** Testing, stability and many fixes on x86 (Paul Pluzhnikov)
+** FreeBSD port and clean separation of OS specific bits 
+   (Konstantin Belousov)
+** Thanks for all the bug reports, contributions and testing!
+
+* News for v0.99:
+
+** Greatly improved x86-64 support thanks to Arun Sharma.
+** Support for PPC64 added by  Jose Flavio Aguilar Paulino.
+
+* News for v0.98.6:
+
+** Fix address-leak triggered by invalid byte-order.  Fixed by Andreas Schwab.
+** On ia64, get_static_proc_name() no longer uses a weak reference to
+   _Uelf64_get_proc_name(), since that was causing problems with archive
+   libraries and no longer served any apparent purpose.  Fixed by
+   Curt Wohlgemuth.
+
+* News for v0.98.5:
+
+** Fix a typo in the man-page of unw_create_addr_space().
+** Fix an off-by-1 bug in the handling of the dynamic ALIAS directive
+   for ia64.  Reported by Todd L. Miller.
+** Fix a bug in libunwind-ptrace which could cause crash due to extraneous
+   munmap() calls.
+
+* News for v0.98.4:
+
+** Fix a typo in _ReadSLEB.c which caused hangs when throwing exceptions
+   from Intel ICC-compiled programs.  Reported by Tommy Hoffner.
+
+* News for v0.98.3:
+
+** Make it possible to link against libunwind-ia64.a only (i.e., without
+   requiring libunwind.a as well).  This keeps apps which need only
+   remote unwinding cleaner, since they logically have no dependency
+   on libunwind.a.
+** Dont link against libatomic_ops for now.  Due to a packaging bug on
+   Debian, linking against this library causes libunwind.so to get
+   a dependency on libatomic_ops.so, which is not at all what we want.
+   Fortunately, we don't have to link against that library on x86 or
+   ia64 since the library is strictly needed only for platforms with
+   poor atomic operation support.  Once the libatomic_ops package is fixed,
+   we can re-enable linking against libatomic_ops.
+
+* News for v0.98.2:
+
+** Fixed bug which caused _UPT_get_dyn_info_list_addr() to sometimes fail
+   needlessly.  Found by Todd L. Miller.
+
+** When using GCC to build libunwind on ia64, libunwind.so had an
+   unresolved reference to __divdi3.  This is undesirable since it
+   creates an implicit dependency on libgcc.  This problem has been
+   fixed in the 0.98.2 release by explicitly linking against libgcc.a
+   when building libunwind.
+
+* News for v0.98.1:
+
+** Fixed a bug which caused "make install" to install libunwind-common.h.in
+   instead of libunwind-common.h.
+** Fixed a bug in the ia64 {sig,}longjmp() which showed on
+   SuSE Linux 9 because it's using a newer compiler & the EPC-based system
+   call stubs.
+** Fixed incorrect offsets in tests/ia64-test-nat-asm.S.
+   Warning: you'll need a GNU assembler dated later than 21-Sep-2004 to
+   get this file translated correctly.  With an old assembler, "make check"
+   will get lots of failures when running Gia64-test-nat or Lia64-test-nat!
+** Convert tests/bt into a full-blown test-case.  It's designed to
+   trigger a (rarely-encountered) bug in the GNU assembler on ia64.
+   The assembler has been fixed and once the libraries (libc etc)
+   have been rebuilt, this test will pass.
+** Added test-case tests/run-ptrace-misc which, on ia64, triggers a bug in
+   current GCC (including v3.4.2) which causes bad unwind info.
+
+* News for v0.98:
+
+** Update libunwind to be compliant with the updated/expanded
+   ia64 unwind specificiation by HJ Lu [1].  This is needed for
+   GCC 3.4 compatibility.
+
+   [1] http://www.kernel.org/pub/linux/devel/gcc/unwind/
+
+** Initial support for x86-64 has been added courtesy of Max Asbock.
+   Along with this came a bunch of DWARF2 unwinder fixes.
+
+** A new rountine unw_strerror() has been added courtesy of
+   Thomas Hallgren.
+
+** Including <libunwind.h> now defines 4 macros that can be used
+   to determine the version number of libunwind.  Specifically,
+   UNW_VERSION_MAJOR, UNW_VERSION_MINOR, UNW_VERSION, and
+   UNW_VERSION_CODE are defined by the header now.
+
+** Bug fixes
+*** Fix a memory-leak in _UPT_get_dyn_info_list_addr() courtesy of Ed Connell.
+*** Fix a crash in libunwind-ptrace courtesy of Mark Young.
+*** Fix a bug in ia64-version of unw_init_remote() which prevented
+    it from working correctly for the local address space.  Reported by
+    Troy Heber.
+*** Many other small and not so small fixes.
+
+* News for v0.97:
+
+** unw_get_proc_name() may now be called from signal-handler.
+
+** The ptrace-helper routines are now declared in libunwind-ptrace.h.
+   Applications which use ptrace-based unwinding should include
+   <libunwind-ptrace.h> to get the _UPT_*() routines declared.
+
+** libunwind has been split into a "local-only" and a "generic" versions.
+   The former is optimized for local unwinding (within a process) and
+   is called libunwind.so (shared version) or libunwind.a (archive
+   version).  The generic version is not limited to unwinding within a
+   process and is called libunwind-generic.so (shared version)
+   libunwind-generic.a (archive version).  Similarly, the ptrace()
+   support has been separated out into a convenience library called
+   libunwind-ptrace.a.  For the most part, backwards-compatibility
+   is retained.  However, when building an application which uses
+   libunwind, it may be necessary to change the linker command-line
+   as shown in the table below:
+
+    Application which does: Before v0.97:  With v0.97:
+    ----------------------- -------------  -----------
+    local unwinding only:   -lunwind       -lunwind
+    remote unwinding:       -lunwind       -lunwind-generic
+    cross unwinding:        -lunwind-PLAT  -lunwind-PLAT
+    ptrace-based unwinding: -lunwind       -lunwind-ptrace -lunwind-generic
+
+   The motivation for this splitting is to keep libunwind.so as minimal
+   as possible.  This library will eventually be loaded by most (if not
+   all) executables and hence it is important to ensure that it can
+   be loaded as quickly as possible.
+
+** unw_getcontext() tuned on IA-64.
+
+   The unw_getcontext() routine used to be provided by (GNU) libc
+   (getcontext()).  This caused unnecessary overhead (e.g., an
+   unnecessary system-call to sigprocmask()).  The new
+   unw_getcontext() only does the work really needed for libunwind and
+   hence performs much better.  However, this change implies that
+   programs linked against libunwind v0.97 won't be
+   backwards-compatible with earlier versions (there would be an
+   unresolved symbol for _Uia64_getcontext()).
+
+** Fix NaT-bit handling on IA-64.
+
+   New test-cases have been added to test the handling of the NaT bit
+   (and floating-point NaT values) and all discovered/known bugs have
+   been fixed.
+
+** Initial DWARF-based unwinder for x86.
+
+   There is a beginning for a DWARF-based unwinder for x86.  Work for
+   x86-64-support based on this DWARF unwinder is currently underway
+   at IBM and it is expected that this support will be merged into the
+   official tree soon.
+
+
+* News for v0.96:
+
+** _Unwind_*() routines defined by the C++ ABI are now included in
+   libunwind.
+
+
+* News for v0.95:
+
+** Bigger, better, faster, or so the theory goes.
+
+
+* News for v0.93:
+
+** More bug-fixes & improved HP-UX support.
+
+
+* News for v0.92:
+
+** Bug-fix release.  IA-64 unwinder can now be built with Intel compiler (ECC).
+
+
+* News for v0.91:
+
+** Lots of documentation updates
+** Some portability fixes.
+
+
+* News for v0.9:
+
+** The libunwind API is mostly feature-complete at this point (hence the
+   version jump from v0.2 to v0.9).
+
+
+* News for v0.2:
+
+** Automated configuration/build with autoconf and automake.
+** Added support for building libunwind as a shared library.
+** Added support for remote unwinding.
+** Added support for cross-building.
+** Added two new routines to the API:
+	- unw_is_fpreg()
+	- unw_get_save_loc()
+** Added multi-architecture supports (lets a single application use
+   the unwind libraries for multiple target architectures; this is useful,
+   e.g., useful for building a debugger that can support multiple targets
+   such as x86, ia64, etc.)
+
+
+* News for v0.1:
+
+** Added support for exception handling.
+
+
+* News for v0.0:
+
+** It's a brand new package.
diff --git a/src/third_party/unwind/dist/README b/src/third_party/unwind/dist/README
new file mode 100644
index 00000000000..2fc98d86e67
--- /dev/null
+++ b/src/third_party/unwind/dist/README
@@ -0,0 +1,201 @@
+# libunwind
+
+[![Build Status](https://travis-ci.org/libunwind/libunwind.svg?branch=master)](https://travis-ci.org/libunwind/libunwind)
+
+This is version 1.4 of the unwind library.  This library supports
+several architecture/operating-system combinations:
+
+| System  | Architecture | Status |
+| :------ | :----------- | :----- |
+| Linux   | x86-64       | ✓      |
+| Linux   | x86          | ✓      |
+| Linux   | ARM          | ✓      |
+| Linux   | AArch64      | ✓      |
+| Linux   | PPC64        | ✓      |
+| Linux   | SuperH       | ✓      |
+| Linux   | IA-64        | ✓      |
+| Linux   | PARISC       | Works well, but C library missing unwind-info |
+| Linux   | Tilegx       | 64-bit mode only |
+| Linux   | MIPS         | Newly added |
+| HP-UX   | IA-64        | Mostly works, but known to have serious limitations |
+| FreeBSD | x86-64       | ✓      |
+| FreeBSD | x86          | ✓      |
+| FreeBSD | AArch64      | ✓      |
+
+## General Build Instructions
+
+In general, this library can be built and installed with the following
+commands:
+
+    $ ./autogen.sh # Needed only for building from git. Depends on libtool.
+    $ ./configure
+    $ make
+    $ make install prefix=PREFIX
+
+where `PREFIX` is the installation prefix.  By default, a prefix of
+`/usr/local` is used, such that `libunwind.a` is installed in
+`/usr/local/lib` and `unwind.h` is installed in `/usr/local/include`.  For
+testing, you may want to use a prefix of `/usr/local` instead.
+
+
+### Building with Intel compiler
+
+#### Version 8 and later
+
+Starting with version 8, the preferred name for the IA-64 Intel
+compiler is `icc` (same name as on x86).  Thus, the configure-line
+should look like this:
+
+    $ ./configure CC=icc CFLAGS="-g -O3 -ip" CXX=icc CCAS=gcc CCASFLAGS=-g \
+        LDFLAGS="-L$PWD/src/.libs"
+
+
+### Building on HP-UX
+
+For the time being, libunwind must be built with GCC on HP-UX.
+
+libunwind should be configured and installed on HP-UX like this:
+
+    $ ./configure CFLAGS="-g -O2 -mlp64" CXXFLAGS="-g -O2 -mlp64"
+
+Caveat: Unwinding of 32-bit (ILP32) binaries is not supported at the moment.
+
+### Workaround for older versions of GCC
+
+GCC v3.0 and GCC v3.2 ship with a bad version of `sys/types.h`.  The
+workaround is to issue the following commands before running
+`configure`:
+
+    $ mkdir $top_dir/include/sys
+    $ cp /usr/include/sys/types.h $top_dir/include/sys
+
+GCC v3.3.2 or later have been fixed and do not require this
+workaround.
+
+### Building for PowerPC64 / Linux
+
+For building for power64 you should use:
+
+    $ ./configure CFLAGS="-g -O2 -m64" CXXFLAGS="-g -O2 -m64"
+
+If your power support altivec registers:
+
+    $ ./configure CFLAGS="-g -O2 -m64 -maltivec" CXXFLAGS="-g -O2 -m64 -maltivec"
+
+To check if your processor has support for vector registers (altivec):
+
+    cat /proc/cpuinfo | grep altivec
+
+and should have something like this:
+
+    cpu             : PPC970, altivec supported
+
+If libunwind seems to not work (backtracing failing), try to compile
+it with `-O0`, without optimizations. There are some compiler problems
+depending on the version of your gcc.
+
+### Building on FreeBSD
+
+General building instructions apply. To build and execute several tests
+on older versions of FreeBSD, you need libexecinfo library available in
+ports as devel/libexecinfo. This port has been removed as of 2017 and is
+indeed no longer needed.
+
+## Regression Testing
+
+After building the library, you can run a set of regression tests with:
+
+    $ make check
+
+### Expected results on IA-64 Linux
+
+Unless you have a very recent C library and compiler installed, it is
+currently expected to have the following tests fail on IA-64 Linux:
+
+* `Gtest-init` (should pass starting with glibc-2.3.x/gcc-3.4)
+* `Ltest-init` (should pass starting with glibc-2.3.x/gcc-3.4)
+* `test-ptrace` (should pass starting with glibc-2.3.x/gcc-3.4)
+* `run-ia64-test-dyn1` (should pass starting with glibc-2.3.x)
+
+This does not mean that libunwind cannot be used with older compilers
+or C libraries, it just means that for certain corner cases, unwinding
+will fail.  Since they're corner cases, it is not likely for
+applications to trigger them.
+
+Note: If you get lots of errors in `Gia64-test-nat` and `Lia64-test-nat`, it's
+almost certainly a sign of an old assembler.  The GNU assembler used
+to encode previous-stack-pointer-relative offsets incorrectly.
+This bug was fixed on 21-Sep-2004 so any later assembler will be
+fine.
+
+### Expected results on x86 Linux
+
+The following tests are expected to fail on x86 Linux:
+
+* `test-ptrace`
+
+### Expected results on x86-64 Linux
+
+The following tests are expected to fail on x86-64 Linux:
+
+* `run-ptrace-misc` (see <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18748>
+  and <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18749>)
+
+### Expected results on PARISC Linux
+
+Caveat: GCC v3.4 or newer is needed on PA-RISC Linux.  Earlier
+versions of the compiler failed to generate the exception-handling
+program header (`GNU_EH_FRAME`) needed for unwinding.
+
+The following tests are expected to fail on x86-64 Linux:
+
+* `Gtest-bt` (backtrace truncated at `kill()` due to lack of unwind-info)
+* `Ltest-bt` (likewise)
+* `Gtest-resume-sig` (`Gresume.c:my_rt_sigreturn()` is wrong somehow)
+* `Ltest-resume-sig` (likewise)
+* `Gtest-init` (likewise)
+* `Ltest-init` (likewise)
+* `Gtest-dyn1` (no dynamic unwind info support yet)
+* `Ltest-dyn1` (no dynamic unwind info support yet)
+* `test-setjmp` (`longjmp()` not implemented yet)
+* `run-check-namespace` (toolchain doesn't support `HIDDEN` yet)
+
+### Expected results on HP-UX
+
+`make check` is currently unsupported for HP-UX.  You can try to run
+it, but most tests will fail (and some may fail to terminate).  The
+only test programs that are known to work at this time are:
+
+* `tests/bt`
+* `tests/Gperf-simple`
+* `tests/test-proc-info`
+* `tests/test-static-link`
+* `tests/Gtest-init`
+* `tests/Ltest-init`
+* `tests/Gtest-resume-sig`
+* `tests/Ltest-resume-sig`
+
+### Expected results on PPC64 Linux
+
+`make check` should run with no more than 10 out of 24 tests failed.
+
+
+## Performance Testing
+
+This distribution includes a few simple performance tests which give
+some idea of the basic cost of various libunwind operations.  After
+building the library, you can run these tests with the following
+commands:
+
+    $ cd tests
+    $ make perf
+
+## Contacting the Developers
+
+Please direct all questions regarding this library to <libunwind-devel@nongnu.org>.
+
+You can do this by sending an email to <libunwind-request@nongnu.org> with
+a body of "subscribe libunwind-devel", or you can subscribe and manage your
+subscription via the web-interface at <https://savannah.nongnu.org/mail/?group=libunwind>.
+
+You can also interact on our GitHub page: <https://github.com/libunwind/libunwind>.
diff --git a/src/third_party/unwind/dist/TODO b/src/third_party/unwind/dist/TODO
new file mode 100644
index 00000000000..8b2e0262b00
--- /dev/null
+++ b/src/third_party/unwind/dist/TODO
@@ -0,0 +1,97 @@
+- Update the libunwind man page for the new/fixed cache-flushing behavior.
+  Effectively, that unw_flush_cache() doesn't have to be called by
+  applications except for extraordinary circumstances (e.g., if application
+  implements its own runtime loader).
+- document split local-only/generic libraries and separate libunwind-ptrace.a
+  convenience-library
+- document new "tdep" member in unw_proc_info_t structure
+- for DWARF 2, use a dummy CIE entry with an augmentation that
+  provides the dyn-info-list-address
+
+=== taken care of:
+
+Testing:
+	+ ensure that saving r4-r7 in a stacked register properly preserves
+	  the NaT bit, even in the face of register-rotation
+	+ ensure that IA64_INSN_MOVE_STACKED works correctly in the face of
+	  register rotation
+	+ on Linux, test access to f32-f127 in a signal handler (e.g., verify
+	  that fph partition gets initialized properly)
++ According to Nicholas S. Wourms <nwourms@netscape.net>, adding this to the
+  Makefile.am:
+	AUTOMAKE_OPTIONS = 1.6 subdir-objects
+  ensures that object-files are build in separate subdirectories and that
+  in turn makes it possible for source files in different directories to
+  have the same filename, thus avoiding the need for those ugly -x86, -ia64,
+  etc., postfixes.
++ Switch ia64 (and rest over) to using Debug() instead of debug()
++ implement non-local versions of dwarf_readXX()
++ consolidate mostly architecture-independent code such as
+  unw_get_accessors() into shared files
++ caching is pretty fundamentally broken, what should happen is this:
+   o On unw_init_local()/unw_init_remote(), libunwind should validate
+     that the cached information is still valid and, if not, flush the
+     cache on its own.  Rationale: once unw_init_local() has been
+     called, it is clear that the unwind info for the calling thread
+     cannot change (otherwise the program would be buggy anyhow) and
+     hence it is sufficient to validate the cache at this point.
+     Similarly, once unw_init_remote() has been called, the target
+     address space must have been stopped, because the unwinding would
+     otherwise be unreliable anyhow.
+   o glibc currently lacks a feature for dl_iterate_phdr() to support
+     safe caching; I proposed on 12/16/2003 that glibc maintain two
+     atomic counters which get inremented whenever something is added
+     to/removed from the dl_iterate_phdr-list.  Once we have such counters,
+     we can use them in libunwind to implement an efficient version of a
+     cache-validation routine.
+   Once this has been fixed, update the libunwind man page accordingly.
+   Effectively, what this means is that unw_flush_cache() doesn't have
+   to be called by applications except for extraordinary circumstances
+   (e.g., if application implements its own runtime loader).
++ man-page for unw_is_fpreg()
++ man-page for _U_dyn_cancel()
++ man-page for _U_dyn_register()
++ global data is not protected by a lock; causes problems if two threads
+  call ia64_init() at almost the same time
++ cache the value of *cfm_loc; each rotate_FOO() call needs it!
++ implement the remote-lookup of the dynamic registration list
++ when doing sigreturn, must restore fp regs (and perhaps other regs) the same
+  way as the (user-level) gate.S sigreturn path does!
++ unw_resume() must at least restore gp (r1)!  consider restoring all
+  scratch regs (but what's the performance impact on exception handling?);
+  alternative: restore scratch regs that may be used during procedure
+  call/return (e.g., r8-r11, f8-f11)
++ implement unw_resume() for the case where the current register frame is split
+  across multiple backing stores
++ document restricions on using unw_resume():
++ implement remote cases of unw_resume()
++ test both with UNW_LOCAL_ONLY and without where this makes sense
++ allow region-length (insn_count) in unw_dyn_region_info_t to be negative
+  to indicate counting from the end of the procedure (to make it possible
+  for differently-sized procedures to share the same region list if they
+  share the same prologue/epilogue).
++ it appears that it is currently not possible to read register UNW_IA64_TP;
+  fix that => no, attempts to access r13 will result in access_reg() callbacks,
+  as desired; for local-case, access to r13 will fail though (since
+  getcontext() doesn't, and shouldn't, capture r13)
++ document the special nature of UNW_IA64_GP: read-only, but adjusted
+  automatically if the IP is changed
++ use pthread-mutexes where necessary, atomic ops where possible
++ man-page for unw_init_local()
++ man-page for unw_init_remote()
++ man-page for unw_create_addr_space()
++ man-page for unw_destroy_addr_space()
++ man-page for unw_get_proc_info()
++ man-page for unw_get_proc_name()
++ man-page for unw_get_accessors()
++ man-page for unw_regname()
++ man-page for unw_flush_cache()
++ man-page for unw_set_caching_policy()
++ man-page for unw_getcontext()
++ man-page for unw_is_signal_frame()
++ man-page for unw_step()
++ man-page for unw_get_reg()
++ man-page for unw_set_reg()
++ man-page for unw_get_fpreg()
++ man-page for unw_set_fpreg()
++ test with Intel compiler
diff --git a/src/third_party/unwind/dist/acinclude.m4 b/src/third_party/unwind/dist/acinclude.m4
new file mode 100644
index 00000000000..497f7c2f215
--- /dev/null
+++ b/src/third_party/unwind/dist/acinclude.m4
@@ -0,0 +1,32 @@
+AC_DEFUN([LIBUNWIND___THREAD],
+[dnl Check whether the compiler supports the __thread keyword.
+if test "x$enable___thread" != xno; then
+  AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread,
+		 [cat > conftest.c <<\EOF
+    __thread int a = 42;
+EOF
+  if AC_TRY_COMMAND([${CC-cc} $CFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then
+    libc_cv_gcc___thread=yes
+  else
+    libc_cv_gcc___thread=no
+  fi
+  rm -f conftest*])
+  if test "$libc_cv_gcc___thread" = yes; then
+    AC_DEFINE(HAVE___THREAD, 1,
+	[Define to 1 if __thread keyword is supported by the C compiler.])
+  fi
+else
+  libc_cv_gcc___thread=no
+fi])
+
+AC_DEFUN([CHECK_ATOMIC_OPS],
+[dnl Check whether the system has the atomic_ops package installed.
+  AC_CHECK_HEADERS(atomic_ops.h)
+#
+# Don't link against libatomic_ops for now.  We don't want libunwind
+# to depend on libatomic_ops.so.  Fortunately, none of the platforms
+# we care about so far need libatomic_ops.a (everything is done via
+# inline macros).
+#
+#  AC_CHECK_LIB(atomic_ops, main)
+])
diff --git a/src/third_party/unwind/dist/aclocal.m4 b/src/third_party/unwind/dist/aclocal.m4
new file mode 100644
index 00000000000..588aa13aee1
--- /dev/null
+++ b/src/third_party/unwind/dist/aclocal.m4
@@ -0,0 +1,10316 @@
+# generated automatically by aclocal 1.15.1 -*- Autoconf -*-
+
+# Copyright (C) 1996-2017 Free Software Foundation, Inc.
+
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+m4_ifndef([AC_CONFIG_MACRO_DIRS], [m4_defun([_AM_CONFIG_MACRO_DIRS], [])m4_defun([AC_CONFIG_MACRO_DIRS], [_AM_CONFIG_MACRO_DIRS($@)])])
+m4_ifndef([AC_AUTOCONF_VERSION],
+  [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl
+m4_if(m4_defn([AC_AUTOCONF_VERSION]), [2.69],,
+[m4_warning([this file was generated for autoconf 2.69.
+You have another version of autoconf.  It may work, but is not guaranteed to.
+If you have problems, you may need to regenerate the build system entirely.
+To do so, use the procedure documented by the package, typically 'autoreconf'.])])
+
+# libtool.m4 - Configure libtool for the host system. -*-Autoconf-*-
+#
+#   Copyright (C) 1996-2001, 2003-2015 Free Software Foundation, Inc.
+#   Written by Gordon Matzigkeit, 1996
+#
+# This file is free software; the Free Software Foundation gives
+# unlimited permission to copy and/or distribute it, with or without
+# modifications, as long as this notice is preserved.
+
+m4_define([_LT_COPYING], [dnl
+# Copyright (C) 2014 Free Software Foundation, Inc.
+# This is free software; see the source for copying conditions.  There is NO
+# warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+# GNU Libtool is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of of the License, or
+# (at your option) any later version.
+#
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program or library that is built
+# using GNU Libtool, you may include this file under the  same
+# distribution terms that you use for the rest of that program.
+#
+# GNU Libtool is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+])
+
+# serial 58 LT_INIT
+
+
+# LT_PREREQ(VERSION)
+# ------------------
+# Complain and exit if this libtool version is less that VERSION.
+m4_defun([LT_PREREQ],
+[m4_if(m4_version_compare(m4_defn([LT_PACKAGE_VERSION]), [$1]), -1,
+       [m4_default([$3],
+		   [m4_fatal([Libtool version $1 or higher is required],
+		             63)])],
+       [$2])])
+
+
+# _LT_CHECK_BUILDDIR
+# ------------------
+# Complain if the absolute build directory name contains unusual characters
+m4_defun([_LT_CHECK_BUILDDIR],
+[case `pwd` in
+  *\ * | *\	*)
+    AC_MSG_WARN([Libtool does not cope well with whitespace in `pwd`]) ;;
+esac
+])
+
+
+# LT_INIT([OPTIONS])
+# ------------------
+AC_DEFUN([LT_INIT],
+[AC_PREREQ([2.62])dnl We use AC_PATH_PROGS_FEATURE_CHECK
+AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT])dnl
+AC_BEFORE([$0], [LT_LANG])dnl
+AC_BEFORE([$0], [LT_OUTPUT])dnl
+AC_BEFORE([$0], [LTDL_INIT])dnl
+m4_require([_LT_CHECK_BUILDDIR])dnl
+
+dnl Autoconf doesn't catch unexpanded LT_ macros by default:
+m4_pattern_forbid([^_?LT_[A-Z_]+$])dnl
+m4_pattern_allow([^(_LT_EOF|LT_DLGLOBAL|LT_DLLAZY_OR_NOW|LT_MULTI_MODULE)$])dnl
+dnl aclocal doesn't pull ltoptions.m4, ltsugar.m4, or ltversion.m4
+dnl unless we require an AC_DEFUNed macro:
+AC_REQUIRE([LTOPTIONS_VERSION])dnl
+AC_REQUIRE([LTSUGAR_VERSION])dnl
+AC_REQUIRE([LTVERSION_VERSION])dnl
+AC_REQUIRE([LTOBSOLETE_VERSION])dnl
+m4_require([_LT_PROG_LTMAIN])dnl
+
+_LT_SHELL_INIT([SHELL=${CONFIG_SHELL-/bin/sh}])
+
+dnl Parse OPTIONS
+_LT_SET_OPTIONS([$0], [$1])
+
+# This can be used to rebuild libtool when needed
+LIBTOOL_DEPS=$ltmain
+
+# Always use our own libtool.
+LIBTOOL='$(SHELL) $(top_builddir)/libtool'
+AC_SUBST(LIBTOOL)dnl
+
+_LT_SETUP
+
+# Only expand once:
+m4_define([LT_INIT])
+])# LT_INIT
+
+# Old names:
+AU_ALIAS([AC_PROG_LIBTOOL], [LT_INIT])
+AU_ALIAS([AM_PROG_LIBTOOL], [LT_INIT])
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([AC_PROG_LIBTOOL], [])
+dnl AC_DEFUN([AM_PROG_LIBTOOL], [])
+
+
+# _LT_PREPARE_CC_BASENAME
+# -----------------------
+m4_defun([_LT_PREPARE_CC_BASENAME], [
+# Calculate cc_basename.  Skip known compiler wrappers and cross-prefix.
+func_cc_basename ()
+{
+    for cc_temp in @S|@*""; do
+      case $cc_temp in
+        compile | *[[\\/]]compile | ccache | *[[\\/]]ccache ) ;;
+        distcc | *[[\\/]]distcc | purify | *[[\\/]]purify ) ;;
+        \-*) ;;
+        *) break;;
+      esac
+    done
+    func_cc_basename_result=`$ECHO "$cc_temp" | $SED "s%.*/%%; s%^$host_alias-%%"`
+}
+])# _LT_PREPARE_CC_BASENAME
+
+
+# _LT_CC_BASENAME(CC)
+# -------------------
+# It would be clearer to call AC_REQUIREs from _LT_PREPARE_CC_BASENAME,
+# but that macro is also expanded into generated libtool script, which
+# arranges for $SED and $ECHO to be set by different means.
+m4_defun([_LT_CC_BASENAME],
+[m4_require([_LT_PREPARE_CC_BASENAME])dnl
+AC_REQUIRE([_LT_DECL_SED])dnl
+AC_REQUIRE([_LT_PROG_ECHO_BACKSLASH])dnl
+func_cc_basename $1
+cc_basename=$func_cc_basename_result
+])
+
+
+# _LT_FILEUTILS_DEFAULTS
+# ----------------------
+# It is okay to use these file commands and assume they have been set
+# sensibly after 'm4_require([_LT_FILEUTILS_DEFAULTS])'.
+m4_defun([_LT_FILEUTILS_DEFAULTS],
+[: ${CP="cp -f"}
+: ${MV="mv -f"}
+: ${RM="rm -f"}
+])# _LT_FILEUTILS_DEFAULTS
+
+
+# _LT_SETUP
+# ---------
+m4_defun([_LT_SETUP],
+[AC_REQUIRE([AC_CANONICAL_HOST])dnl
+AC_REQUIRE([AC_CANONICAL_BUILD])dnl
+AC_REQUIRE([_LT_PREPARE_SED_QUOTE_VARS])dnl
+AC_REQUIRE([_LT_PROG_ECHO_BACKSLASH])dnl
+
+_LT_DECL([], [PATH_SEPARATOR], [1], [The PATH separator for the build system])dnl
+dnl
+_LT_DECL([], [host_alias], [0], [The host system])dnl
+_LT_DECL([], [host], [0])dnl
+_LT_DECL([], [host_os], [0])dnl
+dnl
+_LT_DECL([], [build_alias], [0], [The build system])dnl
+_LT_DECL([], [build], [0])dnl
+_LT_DECL([], [build_os], [0])dnl
+dnl
+AC_REQUIRE([AC_PROG_CC])dnl
+AC_REQUIRE([LT_PATH_LD])dnl
+AC_REQUIRE([LT_PATH_NM])dnl
+dnl
+AC_REQUIRE([AC_PROG_LN_S])dnl
+test -z "$LN_S" && LN_S="ln -s"
+_LT_DECL([], [LN_S], [1], [Whether we need soft or hard links])dnl
+dnl
+AC_REQUIRE([LT_CMD_MAX_LEN])dnl
+_LT_DECL([objext], [ac_objext], [0], [Object file suffix (normally "o")])dnl
+_LT_DECL([], [exeext], [0], [Executable file suffix (normally "")])dnl
+dnl
+m4_require([_LT_FILEUTILS_DEFAULTS])dnl
+m4_require([_LT_CHECK_SHELL_FEATURES])dnl
+m4_require([_LT_PATH_CONVERSION_FUNCTIONS])dnl
+m4_require([_LT_CMD_RELOAD])dnl
+m4_require([_LT_CHECK_MAGIC_METHOD])dnl
+m4_require([_LT_CHECK_SHAREDLIB_FROM_LINKLIB])dnl
+m4_require([_LT_CMD_OLD_ARCHIVE])dnl
+m4_require([_LT_CMD_GLOBAL_SYMBOLS])dnl
+m4_require([_LT_WITH_SYSROOT])dnl
+m4_require([_LT_CMD_TRUNCATE])dnl
+
+_LT_CONFIG_LIBTOOL_INIT([
+# See if we are running on zsh, and set the options that allow our
+# commands through without removal of \ escapes INIT.
+if test -n "\${ZSH_VERSION+set}"; then
+   setopt NO_GLOB_SUBST
+fi
+])
+if test -n "${ZSH_VERSION+set}"; then
+   setopt NO_GLOB_SUBST
+fi
+
+_LT_CHECK_OBJDIR
+
+m4_require([_LT_TAG_COMPILER])dnl
+
+case $host_os in
+aix3*)
+  # AIX sometimes has problems with the GCC collect2 program.  For some
+  # reason, if we set the COLLECT_NAMES environment variable, the problems
+  # vanish in a puff of smoke.
+  if test set != "${COLLECT_NAMES+set}"; then
+    COLLECT_NAMES=
+    export COLLECT_NAMES
+  fi
+  ;;
+esac
+
+# Global variables:
+ofile=libtool
+can_build_shared=yes
+
+# All known linkers require a '.a' archive for static linking (except MSVC,
+# which needs '.lib').
+libext=a
+
+with_gnu_ld=$lt_cv_prog_gnu_ld
+
+old_CC=$CC
+old_CFLAGS=$CFLAGS
+
+# Set sane defaults for various variables
+test -z "$CC" && CC=cc
+test -z "$LTCC" && LTCC=$CC
+test -z "$LTCFLAGS" && LTCFLAGS=$CFLAGS
+test -z "$LD" && LD=ld
+test -z "$ac_objext" && ac_objext=o
+
+_LT_CC_BASENAME([$compiler])
+
+# Only perform the check for file, if the check method requires it
+test -z "$MAGIC_CMD" && MAGIC_CMD=file
+case $deplibs_check_method in
+file_magic*)
+  if test "$file_magic_cmd" = '$MAGIC_CMD'; then
+    _LT_PATH_MAGIC
+  fi
+  ;;
+esac
+
+# Use C for the default configuration in the libtool script
+LT_SUPPORTED_TAG([CC])
+_LT_LANG_C_CONFIG
+_LT_LANG_DEFAULT_CONFIG
+_LT_CONFIG_COMMANDS
+])# _LT_SETUP
+
+
+# _LT_PREPARE_SED_QUOTE_VARS
+# --------------------------
+# Define a few sed substitution that help us do robust quoting.
+m4_defun([_LT_PREPARE_SED_QUOTE_VARS],
+[# Backslashify metacharacters that are still active within
+# double-quoted strings.
+sed_quote_subst='s/\([["`$\\]]\)/\\\1/g'
+
+# Same as above, but do not quote variable references.
+double_quote_subst='s/\([["`\\]]\)/\\\1/g'
+
+# Sed substitution to delay expansion of an escaped shell variable in a
+# double_quote_subst'ed string.
+delay_variable_subst='s/\\\\\\\\\\\$/\\\\\\$/g'
+
+# Sed substitution to delay expansion of an escaped single quote.
+delay_single_quote_subst='s/'\''/'\'\\\\\\\'\''/g'
+
+# Sed substitution to avoid accidental globbing in evaled expressions
+no_glob_subst='s/\*/\\\*/g'
+])
+
+# _LT_PROG_LTMAIN
+# ---------------
+# Note that this code is called both from 'configure', and 'config.status'
+# now that we use AC_CONFIG_COMMANDS to generate libtool.  Notably,
+# 'config.status' has no value for ac_aux_dir unless we are using Automake,
+# so we pass a copy along to make sure it has a sensible value anyway.
+m4_defun([_LT_PROG_LTMAIN],
+[m4_ifdef([AC_REQUIRE_AUX_FILE], [AC_REQUIRE_AUX_FILE([ltmain.sh])])dnl
+_LT_CONFIG_LIBTOOL_INIT([ac_aux_dir='$ac_aux_dir'])
+ltmain=$ac_aux_dir/ltmain.sh
+])# _LT_PROG_LTMAIN
+
+
+
+# So that we can recreate a full libtool script including additional
+# tags, we accumulate the chunks of code to send to AC_CONFIG_COMMANDS
+# in macros and then make a single call at the end using the 'libtool'
+# label.
+
+
+# _LT_CONFIG_LIBTOOL_INIT([INIT-COMMANDS])
+# ----------------------------------------
+# Register INIT-COMMANDS to be passed to AC_CONFIG_COMMANDS later.
+m4_define([_LT_CONFIG_LIBTOOL_INIT],
+[m4_ifval([$1],
+          [m4_append([_LT_OUTPUT_LIBTOOL_INIT],
+                     [$1
+])])])
+
+# Initialize.
+m4_define([_LT_OUTPUT_LIBTOOL_INIT])
+
+
+# _LT_CONFIG_LIBTOOL([COMMANDS])
+# ------------------------------
+# Register COMMANDS to be passed to AC_CONFIG_COMMANDS later.
+m4_define([_LT_CONFIG_LIBTOOL],
+[m4_ifval([$1],
+          [m4_append([_LT_OUTPUT_LIBTOOL_COMMANDS],
+                     [$1
+])])])
+
+# Initialize.
+m4_define([_LT_OUTPUT_LIBTOOL_COMMANDS])
+
+
+# _LT_CONFIG_SAVE_COMMANDS([COMMANDS], [INIT_COMMANDS])
+# -----------------------------------------------------
+m4_defun([_LT_CONFIG_SAVE_COMMANDS],
+[_LT_CONFIG_LIBTOOL([$1])
+_LT_CONFIG_LIBTOOL_INIT([$2])
+])
+
+
+# _LT_FORMAT_COMMENT([COMMENT])
+# -----------------------------
+# Add leading comment marks to the start of each line, and a trailing
+# full-stop to the whole comment if one is not present already.
+m4_define([_LT_FORMAT_COMMENT],
+[m4_ifval([$1], [
+m4_bpatsubst([m4_bpatsubst([$1], [^ *], [# ])],
+              [['`$\]], [\\\&])]m4_bmatch([$1], [[!?.]$], [], [.])
+)])
+
+
+
+
+
+# _LT_DECL([CONFIGNAME], VARNAME, VALUE, [DESCRIPTION], [IS-TAGGED?])
+# -------------------------------------------------------------------
+# CONFIGNAME is the name given to the value in the libtool script.
+# VARNAME is the (base) name used in the configure script.
+# VALUE may be 0, 1 or 2 for a computed quote escaped value based on
+# VARNAME.  Any other value will be used directly.
+m4_define([_LT_DECL],
+[lt_if_append_uniq([lt_decl_varnames], [$2], [, ],
+    [lt_dict_add_subkey([lt_decl_dict], [$2], [libtool_name],
+	[m4_ifval([$1], [$1], [$2])])
+    lt_dict_add_subkey([lt_decl_dict], [$2], [value], [$3])
+    m4_ifval([$4],
+	[lt_dict_add_subkey([lt_decl_dict], [$2], [description], [$4])])
+    lt_dict_add_subkey([lt_decl_dict], [$2],
+	[tagged?], [m4_ifval([$5], [yes], [no])])])
+])
+
+
+# _LT_TAGDECL([CONFIGNAME], VARNAME, VALUE, [DESCRIPTION])
+# --------------------------------------------------------
+m4_define([_LT_TAGDECL], [_LT_DECL([$1], [$2], [$3], [$4], [yes])])
+
+
+# lt_decl_tag_varnames([SEPARATOR], [VARNAME1...])
+# ------------------------------------------------
+m4_define([lt_decl_tag_varnames],
+[_lt_decl_filter([tagged?], [yes], $@)])
+
+
+# _lt_decl_filter(SUBKEY, VALUE, [SEPARATOR], [VARNAME1..])
+# ---------------------------------------------------------
+m4_define([_lt_decl_filter],
+[m4_case([$#],
+  [0], [m4_fatal([$0: too few arguments: $#])],
+  [1], [m4_fatal([$0: too few arguments: $#: $1])],
+  [2], [lt_dict_filter([lt_decl_dict], [$1], [$2], [], lt_decl_varnames)],
+  [3], [lt_dict_filter([lt_decl_dict], [$1], [$2], [$3], lt_decl_varnames)],
+  [lt_dict_filter([lt_decl_dict], $@)])[]dnl
+])
+
+
+# lt_decl_quote_varnames([SEPARATOR], [VARNAME1...])
+# --------------------------------------------------
+m4_define([lt_decl_quote_varnames],
+[_lt_decl_filter([value], [1], $@)])
+
+
+# lt_decl_dquote_varnames([SEPARATOR], [VARNAME1...])
+# ---------------------------------------------------
+m4_define([lt_decl_dquote_varnames],
+[_lt_decl_filter([value], [2], $@)])
+
+
+# lt_decl_varnames_tagged([SEPARATOR], [VARNAME1...])
+# ---------------------------------------------------
+m4_define([lt_decl_varnames_tagged],
+[m4_assert([$# <= 2])dnl
+_$0(m4_quote(m4_default([$1], [[, ]])),
+    m4_ifval([$2], [[$2]], [m4_dquote(lt_decl_tag_varnames)]),
+    m4_split(m4_normalize(m4_quote(_LT_TAGS)), [ ]))])
+m4_define([_lt_decl_varnames_tagged],
+[m4_ifval([$3], [lt_combine([$1], [$2], [_], $3)])])
+
+
+# lt_decl_all_varnames([SEPARATOR], [VARNAME1...])
+# ------------------------------------------------
+m4_define([lt_decl_all_varnames],
+[_$0(m4_quote(m4_default([$1], [[, ]])),
+     m4_if([$2], [],
+	   m4_quote(lt_decl_varnames),
+	m4_quote(m4_shift($@))))[]dnl
+])
+m4_define([_lt_decl_all_varnames],
+[lt_join($@, lt_decl_varnames_tagged([$1],
+			lt_decl_tag_varnames([[, ]], m4_shift($@))))dnl
+])
+
+
+# _LT_CONFIG_STATUS_DECLARE([VARNAME])
+# ------------------------------------
+# Quote a variable value, and forward it to 'config.status' so that its
+# declaration there will have the same value as in 'configure'.  VARNAME
+# must have a single quote delimited value for this to work.
+m4_define([_LT_CONFIG_STATUS_DECLARE],
+[$1='`$ECHO "$][$1" | $SED "$delay_single_quote_subst"`'])
+
+
+# _LT_CONFIG_STATUS_DECLARATIONS
+# ------------------------------
+# We delimit libtool config variables with single quotes, so when
+# we write them to config.status, we have to be sure to quote all
+# embedded single quotes properly.  In configure, this macro expands
+# each variable declared with _LT_DECL (and _LT_TAGDECL) into:
+#
+#    <var>='`$ECHO "$<var>" | $SED "$delay_single_quote_subst"`'
+m4_defun([_LT_CONFIG_STATUS_DECLARATIONS],
+[m4_foreach([_lt_var], m4_quote(lt_decl_all_varnames),
+    [m4_n([_LT_CONFIG_STATUS_DECLARE(_lt_var)])])])
+
+
+# _LT_LIBTOOL_TAGS
+# ----------------
+# Output comment and list of tags supported by the script
+m4_defun([_LT_LIBTOOL_TAGS],
+[_LT_FORMAT_COMMENT([The names of the tagged configurations supported by this script])dnl
+available_tags='_LT_TAGS'dnl
+])
+
+
+# _LT_LIBTOOL_DECLARE(VARNAME, [TAG])
+# -----------------------------------
+# Extract the dictionary values for VARNAME (optionally with TAG) and
+# expand to a commented shell variable setting:
+#
+#    # Some comment about what VAR is for.
+#    visible_name=$lt_internal_name
+m4_define([_LT_LIBTOOL_DECLARE],
+[_LT_FORMAT_COMMENT(m4_quote(lt_dict_fetch([lt_decl_dict], [$1],
+					   [description])))[]dnl
+m4_pushdef([_libtool_name],
+    m4_quote(lt_dict_fetch([lt_decl_dict], [$1], [libtool_name])))[]dnl
+m4_case(m4_quote(lt_dict_fetch([lt_decl_dict], [$1], [value])),
+    [0], [_libtool_name=[$]$1],
+    [1], [_libtool_name=$lt_[]$1],
+    [2], [_libtool_name=$lt_[]$1],
+    [_libtool_name=lt_dict_fetch([lt_decl_dict], [$1], [value])])[]dnl
+m4_ifval([$2], [_$2])[]m4_popdef([_libtool_name])[]dnl
+])
+
+
+# _LT_LIBTOOL_CONFIG_VARS
+# -----------------------
+# Produce commented declarations of non-tagged libtool config variables
+# suitable for insertion in the LIBTOOL CONFIG section of the 'libtool'
+# script.  Tagged libtool config variables (even for the LIBTOOL CONFIG
+# section) are produced by _LT_LIBTOOL_TAG_VARS.
+m4_defun([_LT_LIBTOOL_CONFIG_VARS],
+[m4_foreach([_lt_var],
+    m4_quote(_lt_decl_filter([tagged?], [no], [], lt_decl_varnames)),
+    [m4_n([_LT_LIBTOOL_DECLARE(_lt_var)])])])
+
+
+# _LT_LIBTOOL_TAG_VARS(TAG)
+# -------------------------
+m4_define([_LT_LIBTOOL_TAG_VARS],
+[m4_foreach([_lt_var], m4_quote(lt_decl_tag_varnames),
+    [m4_n([_LT_LIBTOOL_DECLARE(_lt_var, [$1])])])])
+
+
+# _LT_TAGVAR(VARNAME, [TAGNAME])
+# ------------------------------
+m4_define([_LT_TAGVAR], [m4_ifval([$2], [$1_$2], [$1])])
+
+
+# _LT_CONFIG_COMMANDS
+# -------------------
+# Send accumulated output to $CONFIG_STATUS.  Thanks to the lists of
+# variables for single and double quote escaping we saved from calls
+# to _LT_DECL, we can put quote escaped variables declarations
+# into 'config.status', and then the shell code to quote escape them in
+# for loops in 'config.status'.  Finally, any additional code accumulated
+# from calls to _LT_CONFIG_LIBTOOL_INIT is expanded.
+m4_defun([_LT_CONFIG_COMMANDS],
+[AC_PROVIDE_IFELSE([LT_OUTPUT],
+	dnl If the libtool generation code has been placed in $CONFIG_LT,
+	dnl instead of duplicating it all over again into config.status,
+	dnl then we will have config.status run $CONFIG_LT later, so it
+	dnl needs to know what name is stored there:
+        [AC_CONFIG_COMMANDS([libtool],
+            [$SHELL $CONFIG_LT || AS_EXIT(1)], [CONFIG_LT='$CONFIG_LT'])],
+    dnl If the libtool generation code is destined for config.status,
+    dnl expand the accumulated commands and init code now:
+    [AC_CONFIG_COMMANDS([libtool],
+        [_LT_OUTPUT_LIBTOOL_COMMANDS], [_LT_OUTPUT_LIBTOOL_COMMANDS_INIT])])
+])#_LT_CONFIG_COMMANDS
+
+
+# Initialize.
+m4_define([_LT_OUTPUT_LIBTOOL_COMMANDS_INIT],
+[
+
+# The HP-UX ksh and POSIX shell print the target directory to stdout
+# if CDPATH is set.
+(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
+
+sed_quote_subst='$sed_quote_subst'
+double_quote_subst='$double_quote_subst'
+delay_variable_subst='$delay_variable_subst'
+_LT_CONFIG_STATUS_DECLARATIONS
+LTCC='$LTCC'
+LTCFLAGS='$LTCFLAGS'
+compiler='$compiler_DEFAULT'
+
+# A function that is used when there is no print builtin or printf.
+func_fallback_echo ()
+{
+  eval 'cat <<_LTECHO_EOF
+\$[]1
+_LTECHO_EOF'
+}
+
+# Quote evaled strings.
+for var in lt_decl_all_varnames([[ \
+]], lt_decl_quote_varnames); do
+    case \`eval \\\\\$ECHO \\\\""\\\\\$\$var"\\\\"\` in
+    *[[\\\\\\\`\\"\\\$]]*)
+      eval "lt_\$var=\\\\\\"\\\`\\\$ECHO \\"\\\$\$var\\" | \\\$SED \\"\\\$sed_quote_subst\\"\\\`\\\\\\"" ## exclude from sc_prohibit_nested_quotes
+      ;;
+    *)
+      eval "lt_\$var=\\\\\\"\\\$\$var\\\\\\""
+      ;;
+    esac
+done
+
+# Double-quote double-evaled strings.
+for var in lt_decl_all_varnames([[ \
+]], lt_decl_dquote_varnames); do
+    case \`eval \\\\\$ECHO \\\\""\\\\\$\$var"\\\\"\` in
+    *[[\\\\\\\`\\"\\\$]]*)
+      eval "lt_\$var=\\\\\\"\\\`\\\$ECHO \\"\\\$\$var\\" | \\\$SED -e \\"\\\$double_quote_subst\\" -e \\"\\\$sed_quote_subst\\" -e \\"\\\$delay_variable_subst\\"\\\`\\\\\\"" ## exclude from sc_prohibit_nested_quotes
+      ;;
+    *)
+      eval "lt_\$var=\\\\\\"\\\$\$var\\\\\\""
+      ;;
+    esac
+done
+
+_LT_OUTPUT_LIBTOOL_INIT
+])
+
+# _LT_GENERATED_FILE_INIT(FILE, [COMMENT])
+# ------------------------------------
+# Generate a child script FILE with all initialization necessary to
+# reuse the environment learned by the parent script, and make the
+# file executable.  If COMMENT is supplied, it is inserted after the
+# '#!' sequence but before initialization text begins.  After this
+# macro, additional text can be appended to FILE to form the body of
+# the child script.  The macro ends with non-zero status if the
+# file could not be fully written (such as if the disk is full).
+m4_ifdef([AS_INIT_GENERATED],
+[m4_defun([_LT_GENERATED_FILE_INIT],[AS_INIT_GENERATED($@)])],
+[m4_defun([_LT_GENERATED_FILE_INIT],
+[m4_require([AS_PREPARE])]dnl
+[m4_pushdef([AS_MESSAGE_LOG_FD])]dnl
+[lt_write_fail=0
+cat >$1 <<_ASEOF || lt_write_fail=1
+#! $SHELL
+# Generated by $as_me.
+$2
+SHELL=\${CONFIG_SHELL-$SHELL}
+export SHELL
+_ASEOF
+cat >>$1 <<\_ASEOF || lt_write_fail=1
+AS_SHELL_SANITIZE
+_AS_PREPARE
+exec AS_MESSAGE_FD>&1
+_ASEOF
+test 0 = "$lt_write_fail" && chmod +x $1[]dnl
+m4_popdef([AS_MESSAGE_LOG_FD])])])# _LT_GENERATED_FILE_INIT
+
+# LT_OUTPUT
+# ---------
+# This macro allows early generation of the libtool script (before
+# AC_OUTPUT is called), incase it is used in configure for compilation
+# tests.
+AC_DEFUN([LT_OUTPUT],
+[: ${CONFIG_LT=./config.lt}
+AC_MSG_NOTICE([creating $CONFIG_LT])
+_LT_GENERATED_FILE_INIT(["$CONFIG_LT"],
+[# Run this file to recreate a libtool stub with the current configuration.])
+
+cat >>"$CONFIG_LT" <<\_LTEOF
+lt_cl_silent=false
+exec AS_MESSAGE_LOG_FD>>config.log
+{
+  echo
+  AS_BOX([Running $as_me.])
+} >&AS_MESSAGE_LOG_FD
+
+lt_cl_help="\
+'$as_me' creates a local libtool stub from the current configuration,
+for use in further configure time tests before the real libtool is
+generated.
+
+Usage: $[0] [[OPTIONS]]
+
+  -h, --help      print this help, then exit
+  -V, --version   print version number, then exit
+  -q, --quiet     do not print progress messages
+  -d, --debug     don't remove temporary files
+
+Report bugs to <bug-libtool@gnu.org>."
+
+lt_cl_version="\
+m4_ifset([AC_PACKAGE_NAME], [AC_PACKAGE_NAME ])config.lt[]dnl
+m4_ifset([AC_PACKAGE_VERSION], [ AC_PACKAGE_VERSION])
+configured by $[0], generated by m4_PACKAGE_STRING.
+
+Copyright (C) 2011 Free Software Foundation, Inc.
+This config.lt script is free software; the Free Software Foundation
+gives unlimited permision to copy, distribute and modify it."
+
+while test 0 != $[#]
+do
+  case $[1] in
+    --version | --v* | -V )
+      echo "$lt_cl_version"; exit 0 ;;
+    --help | --h* | -h )
+      echo "$lt_cl_help"; exit 0 ;;
+    --debug | --d* | -d )
+      debug=: ;;
+    --quiet | --q* | --silent | --s* | -q )
+      lt_cl_silent=: ;;
+
+    -*) AC_MSG_ERROR([unrecognized option: $[1]
+Try '$[0] --help' for more information.]) ;;
+
+    *) AC_MSG_ERROR([unrecognized argument: $[1]
+Try '$[0] --help' for more information.]) ;;
+  esac
+  shift
+done
+
+if $lt_cl_silent; then
+  exec AS_MESSAGE_FD>/dev/null
+fi
+_LTEOF
+
+cat >>"$CONFIG_LT" <<_LTEOF
+_LT_OUTPUT_LIBTOOL_COMMANDS_INIT
+_LTEOF
+
+cat >>"$CONFIG_LT" <<\_LTEOF
+AC_MSG_NOTICE([creating $ofile])
+_LT_OUTPUT_LIBTOOL_COMMANDS
+AS_EXIT(0)
+_LTEOF
+chmod +x "$CONFIG_LT"
+
+# configure is writing to config.log, but config.lt does its own redirection,
+# appending to config.log, which fails on DOS, as config.log is still kept
+# open by configure.  Here we exec the FD to /dev/null, effectively closing
+# config.log, so it can be properly (re)opened and appended to by config.lt.
+lt_cl_success=:
+test yes = "$silent" &&
+  lt_config_lt_args="$lt_config_lt_args --quiet"
+exec AS_MESSAGE_LOG_FD>/dev/null
+$SHELL "$CONFIG_LT" $lt_config_lt_args || lt_cl_success=false
+exec AS_MESSAGE_LOG_FD>>config.log
+$lt_cl_success || AS_EXIT(1)
+])# LT_OUTPUT
+
+
+# _LT_CONFIG(TAG)
+# ---------------
+# If TAG is the built-in tag, create an initial libtool script with a
+# default configuration from the untagged config vars.  Otherwise add code
+# to config.status for appending the configuration named by TAG from the
+# matching tagged config vars.
+m4_defun([_LT_CONFIG],
+[m4_require([_LT_FILEUTILS_DEFAULTS])dnl
+_LT_CONFIG_SAVE_COMMANDS([
+  m4_define([_LT_TAG], m4_if([$1], [], [C], [$1]))dnl
+  m4_if(_LT_TAG, [C], [
+    # See if we are running on zsh, and set the options that allow our
+    # commands through without removal of \ escapes.
+    if test -n "${ZSH_VERSION+set}"; then
+      setopt NO_GLOB_SUBST
+    fi
+
+    cfgfile=${ofile}T
+    trap "$RM \"$cfgfile\"; exit 1" 1 2 15
+    $RM "$cfgfile"
+
+    cat <<_LT_EOF >> "$cfgfile"
+#! $SHELL
+# Generated automatically by $as_me ($PACKAGE) $VERSION
+# NOTE: Changes made to this file will be lost: look at ltmain.sh.
+
+# Provide generalized library-building support services.
+# Written by Gordon Matzigkeit, 1996
+
+_LT_COPYING
+_LT_LIBTOOL_TAGS
+
+# Configured defaults for sys_lib_dlsearch_path munging.
+: \${LT_SYS_LIBRARY_PATH="$configure_time_lt_sys_library_path"}
+
+# ### BEGIN LIBTOOL CONFIG
+_LT_LIBTOOL_CONFIG_VARS
+_LT_LIBTOOL_TAG_VARS
+# ### END LIBTOOL CONFIG
+
+_LT_EOF
+
+    cat <<'_LT_EOF' >> "$cfgfile"
+
+# ### BEGIN FUNCTIONS SHARED WITH CONFIGURE
+
+_LT_PREPARE_MUNGE_PATH_LIST
+_LT_PREPARE_CC_BASENAME
+
+# ### END FUNCTIONS SHARED WITH CONFIGURE
+
+_LT_EOF
+
+  case $host_os in
+  aix3*)
+    cat <<\_LT_EOF >> "$cfgfile"
+# AIX sometimes has problems with the GCC collect2 program.  For some
+# reason, if we set the COLLECT_NAMES environment variable, the problems
+# vanish in a puff of smoke.
+if test set != "${COLLECT_NAMES+set}"; then
+  COLLECT_NAMES=
+  export COLLECT_NAMES
+fi
+_LT_EOF
+    ;;
+  esac
+
+  _LT_PROG_LTMAIN
+
+  # We use sed instead of cat because bash on DJGPP gets confused if
+  # if finds mixed CR/LF and LF-only lines.  Since sed operates in
+  # text mode, it properly converts lines to CR/LF.  This bash problem
+  # is reportedly fixed, but why not run on old versions too?
+  sed '$q' "$ltmain" >> "$cfgfile" \
+     || (rm -f "$cfgfile"; exit 1)
+
+   mv -f "$cfgfile" "$ofile" ||
+    (rm -f "$ofile" && cp "$cfgfile" "$ofile" && rm -f "$cfgfile")
+  chmod +x "$ofile"
+],
+[cat <<_LT_EOF >> "$ofile"
+
+dnl Unfortunately we have to use $1 here, since _LT_TAG is not expanded
+dnl in a comment (ie after a #).
+# ### BEGIN LIBTOOL TAG CONFIG: $1
+_LT_LIBTOOL_TAG_VARS(_LT_TAG)
+# ### END LIBTOOL TAG CONFIG: $1
+_LT_EOF
+])dnl /m4_if
+],
+[m4_if([$1], [], [
+    PACKAGE='$PACKAGE'
+    VERSION='$VERSION'
+    RM='$RM'
+    ofile='$ofile'], [])
+])dnl /_LT_CONFIG_SAVE_COMMANDS
+])# _LT_CONFIG
+
+
+# LT_SUPPORTED_TAG(TAG)
+# ---------------------
+# Trace this macro to discover what tags are supported by the libtool
+# --tag option, using:
+#    autoconf --trace 'LT_SUPPORTED_TAG:$1'
+AC_DEFUN([LT_SUPPORTED_TAG], [])
+
+
+# C support is built-in for now
+m4_define([_LT_LANG_C_enabled], [])
+m4_define([_LT_TAGS], [])
+
+
+# LT_LANG(LANG)
+# -------------
+# Enable libtool support for the given language if not already enabled.
+AC_DEFUN([LT_LANG],
+[AC_BEFORE([$0], [LT_OUTPUT])dnl
+m4_case([$1],
+  [C],			[_LT_LANG(C)],
+  [C++],		[_LT_LANG(CXX)],
+  [Go],			[_LT_LANG(GO)],
+  [Java],		[_LT_LANG(GCJ)],
+  [Fortran 77],		[_LT_LANG(F77)],
+  [Fortran],		[_LT_LANG(FC)],
+  [Windows Resource],	[_LT_LANG(RC)],
+  [m4_ifdef([_LT_LANG_]$1[_CONFIG],
+    [_LT_LANG($1)],
+    [m4_fatal([$0: unsupported language: "$1"])])])dnl
+])# LT_LANG
+
+
+# _LT_LANG(LANGNAME)
+# ------------------
+m4_defun([_LT_LANG],
+[m4_ifdef([_LT_LANG_]$1[_enabled], [],
+  [LT_SUPPORTED_TAG([$1])dnl
+  m4_append([_LT_TAGS], [$1 ])dnl
+  m4_define([_LT_LANG_]$1[_enabled], [])dnl
+  _LT_LANG_$1_CONFIG($1)])dnl
+])# _LT_LANG
+
+
+m4_ifndef([AC_PROG_GO], [
+# NOTE: This macro has been submitted for inclusion into   #
+#  GNU Autoconf as AC_PROG_GO.  When it is available in    #
+#  a released version of Autoconf we should remove this    #
+#  macro and use it instead.                               #
+m4_defun([AC_PROG_GO],
+[AC_LANG_PUSH(Go)dnl
+AC_ARG_VAR([GOC],     [Go compiler command])dnl
+AC_ARG_VAR([GOFLAGS], [Go compiler flags])dnl
+_AC_ARG_VAR_LDFLAGS()dnl
+AC_CHECK_TOOL(GOC, gccgo)
+if test -z "$GOC"; then
+  if test -n "$ac_tool_prefix"; then
+    AC_CHECK_PROG(GOC, [${ac_tool_prefix}gccgo], [${ac_tool_prefix}gccgo])
+  fi
+fi
+if test -z "$GOC"; then
+  AC_CHECK_PROG(GOC, gccgo, gccgo, false)
+fi
+])#m4_defun
+])#m4_ifndef
+
+
+# _LT_LANG_DEFAULT_CONFIG
+# -----------------------
+m4_defun([_LT_LANG_DEFAULT_CONFIG],
+[AC_PROVIDE_IFELSE([AC_PROG_CXX],
+  [LT_LANG(CXX)],
+  [m4_define([AC_PROG_CXX], defn([AC_PROG_CXX])[LT_LANG(CXX)])])
+
+AC_PROVIDE_IFELSE([AC_PROG_F77],
+  [LT_LANG(F77)],
+  [m4_define([AC_PROG_F77], defn([AC_PROG_F77])[LT_LANG(F77)])])
+
+AC_PROVIDE_IFELSE([AC_PROG_FC],
+  [LT_LANG(FC)],
+  [m4_define([AC_PROG_FC], defn([AC_PROG_FC])[LT_LANG(FC)])])
+
+dnl The call to [A][M_PROG_GCJ] is quoted like that to stop aclocal
+dnl pulling things in needlessly.
+AC_PROVIDE_IFELSE([AC_PROG_GCJ],
+  [LT_LANG(GCJ)],
+  [AC_PROVIDE_IFELSE([A][M_PROG_GCJ],
+    [LT_LANG(GCJ)],
+    [AC_PROVIDE_IFELSE([LT_PROG_GCJ],
+      [LT_LANG(GCJ)],
+      [m4_ifdef([AC_PROG_GCJ],
+	[m4_define([AC_PROG_GCJ], defn([AC_PROG_GCJ])[LT_LANG(GCJ)])])
+       m4_ifdef([A][M_PROG_GCJ],
+	[m4_define([A][M_PROG_GCJ], defn([A][M_PROG_GCJ])[LT_LANG(GCJ)])])
+       m4_ifdef([LT_PROG_GCJ],
+	[m4_define([LT_PROG_GCJ], defn([LT_PROG_GCJ])[LT_LANG(GCJ)])])])])])
+
+AC_PROVIDE_IFELSE([AC_PROG_GO],
+  [LT_LANG(GO)],
+  [m4_define([AC_PROG_GO], defn([AC_PROG_GO])[LT_LANG(GO)])])
+
+AC_PROVIDE_IFELSE([LT_PROG_RC],
+  [LT_LANG(RC)],
+  [m4_define([LT_PROG_RC], defn([LT_PROG_RC])[LT_LANG(RC)])])
+])# _LT_LANG_DEFAULT_CONFIG
+
+# Obsolete macros:
+AU_DEFUN([AC_LIBTOOL_CXX], [LT_LANG(C++)])
+AU_DEFUN([AC_LIBTOOL_F77], [LT_LANG(Fortran 77)])
+AU_DEFUN([AC_LIBTOOL_FC], [LT_LANG(Fortran)])
+AU_DEFUN([AC_LIBTOOL_GCJ], [LT_LANG(Java)])
+AU_DEFUN([AC_LIBTOOL_RC], [LT_LANG(Windows Resource)])
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([AC_LIBTOOL_CXX], [])
+dnl AC_DEFUN([AC_LIBTOOL_F77], [])
+dnl AC_DEFUN([AC_LIBTOOL_FC], [])
+dnl AC_DEFUN([AC_LIBTOOL_GCJ], [])
+dnl AC_DEFUN([AC_LIBTOOL_RC], [])
+
+
+# _LT_TAG_COMPILER
+# ----------------
+m4_defun([_LT_TAG_COMPILER],
+[AC_REQUIRE([AC_PROG_CC])dnl
+
+_LT_DECL([LTCC], [CC], [1], [A C compiler])dnl
+_LT_DECL([LTCFLAGS], [CFLAGS], [1], [LTCC compiler flags])dnl
+_LT_TAGDECL([CC], [compiler], [1], [A language specific compiler])dnl
+_LT_TAGDECL([with_gcc], [GCC], [0], [Is the compiler the GNU compiler?])dnl
+
+# If no C compiler was specified, use CC.
+LTCC=${LTCC-"$CC"}
+
+# If no C compiler flags were specified, use CFLAGS.
+LTCFLAGS=${LTCFLAGS-"$CFLAGS"}
+
+# Allow CC to be a program name with arguments.
+compiler=$CC
+])# _LT_TAG_COMPILER
+
+
+# _LT_COMPILER_BOILERPLATE
+# ------------------------
+# Check for compiler boilerplate output or warnings with
+# the simple compiler test code.
+m4_defun([_LT_COMPILER_BOILERPLATE],
+[m4_require([_LT_DECL_SED])dnl
+ac_outfile=conftest.$ac_objext
+echo "$lt_simple_compile_test_code" >conftest.$ac_ext
+eval "$ac_compile" 2>&1 >/dev/null | $SED '/^$/d; /^ *+/d' >conftest.err
+_lt_compiler_boilerplate=`cat conftest.err`
+$RM conftest*
+])# _LT_COMPILER_BOILERPLATE
+
+
+# _LT_LINKER_BOILERPLATE
+# ----------------------
+# Check for linker boilerplate output or warnings with
+# the simple link test code.
+m4_defun([_LT_LINKER_BOILERPLATE],
+[m4_require([_LT_DECL_SED])dnl
+ac_outfile=conftest.$ac_objext
+echo "$lt_simple_link_test_code" >conftest.$ac_ext
+eval "$ac_link" 2>&1 >/dev/null | $SED '/^$/d; /^ *+/d' >conftest.err
+_lt_linker_boilerplate=`cat conftest.err`
+$RM -r conftest*
+])# _LT_LINKER_BOILERPLATE
+
+# _LT_REQUIRED_DARWIN_CHECKS
+# -------------------------
+m4_defun_once([_LT_REQUIRED_DARWIN_CHECKS],[
+  case $host_os in
+    rhapsody* | darwin*)
+    AC_CHECK_TOOL([DSYMUTIL], [dsymutil], [:])
+    AC_CHECK_TOOL([NMEDIT], [nmedit], [:])
+    AC_CHECK_TOOL([LIPO], [lipo], [:])
+    AC_CHECK_TOOL([OTOOL], [otool], [:])
+    AC_CHECK_TOOL([OTOOL64], [otool64], [:])
+    _LT_DECL([], [DSYMUTIL], [1],
+      [Tool to manipulate archived DWARF debug symbol files on Mac OS X])
+    _LT_DECL([], [NMEDIT], [1],
+      [Tool to change global to local symbols on Mac OS X])
+    _LT_DECL([], [LIPO], [1],
+      [Tool to manipulate fat objects and archives on Mac OS X])
+    _LT_DECL([], [OTOOL], [1],
+      [ldd/readelf like tool for Mach-O binaries on Mac OS X])
+    _LT_DECL([], [OTOOL64], [1],
+      [ldd/readelf like tool for 64 bit Mach-O binaries on Mac OS X 10.4])
+
+    AC_CACHE_CHECK([for -single_module linker flag],[lt_cv_apple_cc_single_mod],
+      [lt_cv_apple_cc_single_mod=no
+      if test -z "$LT_MULTI_MODULE"; then
+	# By default we will add the -single_module flag. You can override
+	# by either setting the environment variable LT_MULTI_MODULE
+	# non-empty at configure time, or by adding -multi_module to the
+	# link flags.
+	rm -rf libconftest.dylib*
+	echo "int foo(void){return 1;}" > conftest.c
+	echo "$LTCC $LTCFLAGS $LDFLAGS -o libconftest.dylib \
+-dynamiclib -Wl,-single_module conftest.c" >&AS_MESSAGE_LOG_FD
+	$LTCC $LTCFLAGS $LDFLAGS -o libconftest.dylib \
+	  -dynamiclib -Wl,-single_module conftest.c 2>conftest.err
+        _lt_result=$?
+	# If there is a non-empty error log, and "single_module"
+	# appears in it, assume the flag caused a linker warning
+        if test -s conftest.err && $GREP single_module conftest.err; then
+	  cat conftest.err >&AS_MESSAGE_LOG_FD
+	# Otherwise, if the output was created with a 0 exit code from
+	# the compiler, it worked.
+	elif test -f libconftest.dylib && test 0 = "$_lt_result"; then
+	  lt_cv_apple_cc_single_mod=yes
+	else
+	  cat conftest.err >&AS_MESSAGE_LOG_FD
+	fi
+	rm -rf libconftest.dylib*
+	rm -f conftest.*
+      fi])
+
+    AC_CACHE_CHECK([for -exported_symbols_list linker flag],
+      [lt_cv_ld_exported_symbols_list],
+      [lt_cv_ld_exported_symbols_list=no
+      save_LDFLAGS=$LDFLAGS
+      echo "_main" > conftest.sym
+      LDFLAGS="$LDFLAGS -Wl,-exported_symbols_list,conftest.sym"
+      AC_LINK_IFELSE([AC_LANG_PROGRAM([],[])],
+	[lt_cv_ld_exported_symbols_list=yes],
+	[lt_cv_ld_exported_symbols_list=no])
+	LDFLAGS=$save_LDFLAGS
+    ])
+
+    AC_CACHE_CHECK([for -force_load linker flag],[lt_cv_ld_force_load],
+      [lt_cv_ld_force_load=no
+      cat > conftest.c << _LT_EOF
+int forced_loaded() { return 2;}
+_LT_EOF
+      echo "$LTCC $LTCFLAGS -c -o conftest.o conftest.c" >&AS_MESSAGE_LOG_FD
+      $LTCC $LTCFLAGS -c -o conftest.o conftest.c 2>&AS_MESSAGE_LOG_FD
+      echo "$AR cru libconftest.a conftest.o" >&AS_MESSAGE_LOG_FD
+      $AR cru libconftest.a conftest.o 2>&AS_MESSAGE_LOG_FD
+      echo "$RANLIB libconftest.a" >&AS_MESSAGE_LOG_FD
+      $RANLIB libconftest.a 2>&AS_MESSAGE_LOG_FD
+      cat > conftest.c << _LT_EOF
+int main() { return 0;}
+_LT_EOF
+      echo "$LTCC $LTCFLAGS $LDFLAGS -o conftest conftest.c -Wl,-force_load,./libconftest.a" >&AS_MESSAGE_LOG_FD
+      $LTCC $LTCFLAGS $LDFLAGS -o conftest conftest.c -Wl,-force_load,./libconftest.a 2>conftest.err
+      _lt_result=$?
+      if test -s conftest.err && $GREP force_load conftest.err; then
+	cat conftest.err >&AS_MESSAGE_LOG_FD
+      elif test -f conftest && test 0 = "$_lt_result" && $GREP forced_load conftest >/dev/null 2>&1; then
+	lt_cv_ld_force_load=yes
+      else
+	cat conftest.err >&AS_MESSAGE_LOG_FD
+      fi
+        rm -f conftest.err libconftest.a conftest conftest.c
+        rm -rf conftest.dSYM
+    ])
+    case $host_os in
+    rhapsody* | darwin1.[[012]])
+      _lt_dar_allow_undefined='$wl-undefined ${wl}suppress' ;;
+    darwin1.*)
+      _lt_dar_allow_undefined='$wl-flat_namespace $wl-undefined ${wl}suppress' ;;
+    darwin*) # darwin 5.x on
+      # if running on 10.5 or later, the deployment target defaults
+      # to the OS version, if on x86, and 10.4, the deployment
+      # target defaults to 10.4. Don't you love it?
+      case ${MACOSX_DEPLOYMENT_TARGET-10.0},$host in
+	10.0,*86*-darwin8*|10.0,*-darwin[[91]]*)
+	  _lt_dar_allow_undefined='$wl-undefined ${wl}dynamic_lookup' ;;
+	10.[[012]][[,.]]*)
+	  _lt_dar_allow_undefined='$wl-flat_namespace $wl-undefined ${wl}suppress' ;;
+	10.*)
+	  _lt_dar_allow_undefined='$wl-undefined ${wl}dynamic_lookup' ;;
+      esac
+    ;;
+  esac
+    if test yes = "$lt_cv_apple_cc_single_mod"; then
+      _lt_dar_single_mod='$single_module'
+    fi
+    if test yes = "$lt_cv_ld_exported_symbols_list"; then
+      _lt_dar_export_syms=' $wl-exported_symbols_list,$output_objdir/$libname-symbols.expsym'
+    else
+      _lt_dar_export_syms='~$NMEDIT -s $output_objdir/$libname-symbols.expsym $lib'
+    fi
+    if test : != "$DSYMUTIL" && test no = "$lt_cv_ld_force_load"; then
+      _lt_dsymutil='~$DSYMUTIL $lib || :'
+    else
+      _lt_dsymutil=
+    fi
+    ;;
+  esac
+])
+
+
+# _LT_DARWIN_LINKER_FEATURES([TAG])
+# ---------------------------------
+# Checks for linker and compiler features on darwin
+m4_defun([_LT_DARWIN_LINKER_FEATURES],
+[
+  m4_require([_LT_REQUIRED_DARWIN_CHECKS])
+  _LT_TAGVAR(archive_cmds_need_lc, $1)=no
+  _LT_TAGVAR(hardcode_direct, $1)=no
+  _LT_TAGVAR(hardcode_automatic, $1)=yes
+  _LT_TAGVAR(hardcode_shlibpath_var, $1)=unsupported
+  if test yes = "$lt_cv_ld_force_load"; then
+    _LT_TAGVAR(whole_archive_flag_spec, $1)='`for conv in $convenience\"\"; do test  -n \"$conv\" && new_convenience=\"$new_convenience $wl-force_load,$conv\"; done; func_echo_all \"$new_convenience\"`'
+    m4_case([$1], [F77], [_LT_TAGVAR(compiler_needs_object, $1)=yes],
+                  [FC],  [_LT_TAGVAR(compiler_needs_object, $1)=yes])
+  else
+    _LT_TAGVAR(whole_archive_flag_spec, $1)=''
+  fi
+  _LT_TAGVAR(link_all_deplibs, $1)=yes
+  _LT_TAGVAR(allow_undefined_flag, $1)=$_lt_dar_allow_undefined
+  case $cc_basename in
+     ifort*|nagfor*) _lt_dar_can_shared=yes ;;
+     *) _lt_dar_can_shared=$GCC ;;
+  esac
+  if test yes = "$_lt_dar_can_shared"; then
+    output_verbose_link_cmd=func_echo_all
+    _LT_TAGVAR(archive_cmds, $1)="\$CC -dynamiclib \$allow_undefined_flag -o \$lib \$libobjs \$deplibs \$compiler_flags -install_name \$rpath/\$soname \$verstring $_lt_dar_single_mod$_lt_dsymutil"
+    _LT_TAGVAR(module_cmds, $1)="\$CC \$allow_undefined_flag -o \$lib -bundle \$libobjs \$deplibs \$compiler_flags$_lt_dsymutil"
+    _LT_TAGVAR(archive_expsym_cmds, $1)="sed 's|^|_|' < \$export_symbols > \$output_objdir/\$libname-symbols.expsym~\$CC -dynamiclib \$allow_undefined_flag -o \$lib \$libobjs \$deplibs \$compiler_flags -install_name \$rpath/\$soname \$verstring $_lt_dar_single_mod$_lt_dar_export_syms$_lt_dsymutil"
+    _LT_TAGVAR(module_expsym_cmds, $1)="sed -e 's|^|_|' < \$export_symbols > \$output_objdir/\$libname-symbols.expsym~\$CC \$allow_undefined_flag -o \$lib -bundle \$libobjs \$deplibs \$compiler_flags$_lt_dar_export_syms$_lt_dsymutil"
+    m4_if([$1], [CXX],
+[   if test yes != "$lt_cv_apple_cc_single_mod"; then
+      _LT_TAGVAR(archive_cmds, $1)="\$CC -r -keep_private_externs -nostdlib -o \$lib-master.o \$libobjs~\$CC -dynamiclib \$allow_undefined_flag -o \$lib \$lib-master.o \$deplibs \$compiler_flags -install_name \$rpath/\$soname \$verstring$_lt_dsymutil"
+      _LT_TAGVAR(archive_expsym_cmds, $1)="sed 's|^|_|' < \$export_symbols > \$output_objdir/\$libname-symbols.expsym~\$CC -r -keep_private_externs -nostdlib -o \$lib-master.o \$libobjs~\$CC -dynamiclib \$allow_undefined_flag -o \$lib \$lib-master.o \$deplibs \$compiler_flags -install_name \$rpath/\$soname \$verstring$_lt_dar_export_syms$_lt_dsymutil"
+    fi
+],[])
+  else
+  _LT_TAGVAR(ld_shlibs, $1)=no
+  fi
+])
+
+# _LT_SYS_MODULE_PATH_AIX([TAGNAME])
+# ----------------------------------
+# Links a minimal program and checks the executable
+# for the system default hardcoded library path. In most cases,
+# this is /usr/lib:/lib, but when the MPI compilers are used
+# the location of the communication and MPI libs are included too.
+# If we don't find anything, use the default library path according
+# to the aix ld manual.
+# Store the results from the different compilers for each TAGNAME.
+# Allow to override them for all tags through lt_cv_aix_libpath.
+m4_defun([_LT_SYS_MODULE_PATH_AIX],
+[m4_require([_LT_DECL_SED])dnl
+if test set = "${lt_cv_aix_libpath+set}"; then
+  aix_libpath=$lt_cv_aix_libpath
+else
+  AC_CACHE_VAL([_LT_TAGVAR([lt_cv_aix_libpath_], [$1])],
+  [AC_LINK_IFELSE([AC_LANG_PROGRAM],[
+  lt_aix_libpath_sed='[
+      /Import File Strings/,/^$/ {
+	  /^0/ {
+	      s/^0  *\([^ ]*\) *$/\1/
+	      p
+	  }
+      }]'
+  _LT_TAGVAR([lt_cv_aix_libpath_], [$1])=`dump -H conftest$ac_exeext 2>/dev/null | $SED -n -e "$lt_aix_libpath_sed"`
+  # Check for a 64-bit object if we didn't find anything.
+  if test -z "$_LT_TAGVAR([lt_cv_aix_libpath_], [$1])"; then
+    _LT_TAGVAR([lt_cv_aix_libpath_], [$1])=`dump -HX64 conftest$ac_exeext 2>/dev/null | $SED -n -e "$lt_aix_libpath_sed"`
+  fi],[])
+  if test -z "$_LT_TAGVAR([lt_cv_aix_libpath_], [$1])"; then
+    _LT_TAGVAR([lt_cv_aix_libpath_], [$1])=/usr/lib:/lib
+  fi
+  ])
+  aix_libpath=$_LT_TAGVAR([lt_cv_aix_libpath_], [$1])
+fi
+])# _LT_SYS_MODULE_PATH_AIX
+
+
+# _LT_SHELL_INIT(ARG)
+# -------------------
+m4_define([_LT_SHELL_INIT],
+[m4_divert_text([M4SH-INIT], [$1
+])])# _LT_SHELL_INIT
+
+
+
+# _LT_PROG_ECHO_BACKSLASH
+# -----------------------
+# Find how we can fake an echo command that does not interpret backslash.
+# In particular, with Autoconf 2.60 or later we add some code to the start
+# of the generated configure script that will find a shell with a builtin
+# printf (that we can use as an echo command).
+m4_defun([_LT_PROG_ECHO_BACKSLASH],
+[ECHO='\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'
+ECHO=$ECHO$ECHO$ECHO$ECHO$ECHO
+ECHO=$ECHO$ECHO$ECHO$ECHO$ECHO$ECHO
+
+AC_MSG_CHECKING([how to print strings])
+# Test print first, because it will be a builtin if present.
+if test "X`( print -r -- -n ) 2>/dev/null`" = X-n && \
+   test "X`print -r -- $ECHO 2>/dev/null`" = "X$ECHO"; then
+  ECHO='print -r --'
+elif test "X`printf %s $ECHO 2>/dev/null`" = "X$ECHO"; then
+  ECHO='printf %s\n'
+else
+  # Use this function as a fallback that always works.
+  func_fallback_echo ()
+  {
+    eval 'cat <<_LTECHO_EOF
+$[]1
+_LTECHO_EOF'
+  }
+  ECHO='func_fallback_echo'
+fi
+
+# func_echo_all arg...
+# Invoke $ECHO with all args, space-separated.
+func_echo_all ()
+{
+    $ECHO "$*"
+}
+
+case $ECHO in
+  printf*) AC_MSG_RESULT([printf]) ;;
+  print*) AC_MSG_RESULT([print -r]) ;;
+  *) AC_MSG_RESULT([cat]) ;;
+esac
+
+m4_ifdef([_AS_DETECT_SUGGESTED],
+[_AS_DETECT_SUGGESTED([
+  test -n "${ZSH_VERSION+set}${BASH_VERSION+set}" || (
+    ECHO='\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'
+    ECHO=$ECHO$ECHO$ECHO$ECHO$ECHO
+    ECHO=$ECHO$ECHO$ECHO$ECHO$ECHO$ECHO
+    PATH=/empty FPATH=/empty; export PATH FPATH
+    test "X`printf %s $ECHO`" = "X$ECHO" \
+      || test "X`print -r -- $ECHO`" = "X$ECHO" )])])
+
+_LT_DECL([], [SHELL], [1], [Shell to use when invoking shell scripts])
+_LT_DECL([], [ECHO], [1], [An echo program that protects backslashes])
+])# _LT_PROG_ECHO_BACKSLASH
+
+
+# _LT_WITH_SYSROOT
+# ----------------
+AC_DEFUN([_LT_WITH_SYSROOT],
+[AC_MSG_CHECKING([for sysroot])
+AC_ARG_WITH([sysroot],
+[AS_HELP_STRING([--with-sysroot@<:@=DIR@:>@],
+  [Search for dependent libraries within DIR (or the compiler's sysroot
+   if not specified).])],
+[], [with_sysroot=no])
+
+dnl lt_sysroot will always be passed unquoted.  We quote it here
+dnl in case the user passed a directory name.
+lt_sysroot=
+case $with_sysroot in #(
+ yes)
+   if test yes = "$GCC"; then
+     lt_sysroot=`$CC --print-sysroot 2>/dev/null`
+   fi
+   ;; #(
+ /*)
+   lt_sysroot=`echo "$with_sysroot" | sed -e "$sed_quote_subst"`
+   ;; #(
+ no|'')
+   ;; #(
+ *)
+   AC_MSG_RESULT([$with_sysroot])
+   AC_MSG_ERROR([The sysroot must be an absolute path.])
+   ;;
+esac
+
+ AC_MSG_RESULT([${lt_sysroot:-no}])
+_LT_DECL([], [lt_sysroot], [0], [The root where to search for ]dnl
+[dependent libraries, and where our libraries should be installed.])])
+
+# _LT_ENABLE_LOCK
+# ---------------
+m4_defun([_LT_ENABLE_LOCK],
+[AC_ARG_ENABLE([libtool-lock],
+  [AS_HELP_STRING([--disable-libtool-lock],
+    [avoid locking (might break parallel builds)])])
+test no = "$enable_libtool_lock" || enable_libtool_lock=yes
+
+# Some flags need to be propagated to the compiler or linker for good
+# libtool support.
+case $host in
+ia64-*-hpux*)
+  # Find out what ABI is being produced by ac_compile, and set mode
+  # options accordingly.
+  echo 'int i;' > conftest.$ac_ext
+  if AC_TRY_EVAL(ac_compile); then
+    case `/usr/bin/file conftest.$ac_objext` in
+      *ELF-32*)
+	HPUX_IA64_MODE=32
+	;;
+      *ELF-64*)
+	HPUX_IA64_MODE=64
+	;;
+    esac
+  fi
+  rm -rf conftest*
+  ;;
+*-*-irix6*)
+  # Find out what ABI is being produced by ac_compile, and set linker
+  # options accordingly.
+  echo '[#]line '$LINENO' "configure"' > conftest.$ac_ext
+  if AC_TRY_EVAL(ac_compile); then
+    if test yes = "$lt_cv_prog_gnu_ld"; then
+      case `/usr/bin/file conftest.$ac_objext` in
+	*32-bit*)
+	  LD="${LD-ld} -melf32bsmip"
+	  ;;
+	*N32*)
+	  LD="${LD-ld} -melf32bmipn32"
+	  ;;
+	*64-bit*)
+	  LD="${LD-ld} -melf64bmip"
+	;;
+      esac
+    else
+      case `/usr/bin/file conftest.$ac_objext` in
+	*32-bit*)
+	  LD="${LD-ld} -32"
+	  ;;
+	*N32*)
+	  LD="${LD-ld} -n32"
+	  ;;
+	*64-bit*)
+	  LD="${LD-ld} -64"
+	  ;;
+      esac
+    fi
+  fi
+  rm -rf conftest*
+  ;;
+
+mips64*-*linux*)
+  # Find out what ABI is being produced by ac_compile, and set linker
+  # options accordingly.
+  echo '[#]line '$LINENO' "configure"' > conftest.$ac_ext
+  if AC_TRY_EVAL(ac_compile); then
+    emul=elf
+    case `/usr/bin/file conftest.$ac_objext` in
+      *32-bit*)
+	emul="${emul}32"
+	;;
+      *64-bit*)
+	emul="${emul}64"
+	;;
+    esac
+    case `/usr/bin/file conftest.$ac_objext` in
+      *MSB*)
+	emul="${emul}btsmip"
+	;;
+      *LSB*)
+	emul="${emul}ltsmip"
+	;;
+    esac
+    case `/usr/bin/file conftest.$ac_objext` in
+      *N32*)
+	emul="${emul}n32"
+	;;
+    esac
+    LD="${LD-ld} -m $emul"
+  fi
+  rm -rf conftest*
+  ;;
+
+x86_64-*kfreebsd*-gnu|x86_64-*linux*|powerpc*-*linux*| \
+s390*-*linux*|s390*-*tpf*|sparc*-*linux*)
+  # Find out what ABI is being produced by ac_compile, and set linker
+  # options accordingly.  Note that the listed cases only cover the
+  # situations where additional linker options are needed (such as when
+  # doing 32-bit compilation for a host where ld defaults to 64-bit, or
+  # vice versa); the common cases where no linker options are needed do
+  # not appear in the list.
+  echo 'int i;' > conftest.$ac_ext
+  if AC_TRY_EVAL(ac_compile); then
+    case `/usr/bin/file conftest.o` in
+      *32-bit*)
+	case $host in
+	  x86_64-*kfreebsd*-gnu)
+	    LD="${LD-ld} -m elf_i386_fbsd"
+	    ;;
+	  x86_64-*linux*)
+	    case `/usr/bin/file conftest.o` in
+	      *x86-64*)
+		LD="${LD-ld} -m elf32_x86_64"
+		;;
+	      *)
+		LD="${LD-ld} -m elf_i386"
+		;;
+	    esac
+	    ;;
+	  powerpc64le-*linux*)
+	    LD="${LD-ld} -m elf32lppclinux"
+	    ;;
+	  powerpc64-*linux*)
+	    LD="${LD-ld} -m elf32ppclinux"
+	    ;;
+	  s390x-*linux*)
+	    LD="${LD-ld} -m elf_s390"
+	    ;;
+	  sparc64-*linux*)
+	    LD="${LD-ld} -m elf32_sparc"
+	    ;;
+	esac
+	;;
+      *64-bit*)
+	case $host in
+	  x86_64-*kfreebsd*-gnu)
+	    LD="${LD-ld} -m elf_x86_64_fbsd"
+	    ;;
+	  x86_64-*linux*)
+	    LD="${LD-ld} -m elf_x86_64"
+	    ;;
+	  powerpcle-*linux*)
+	    LD="${LD-ld} -m elf64lppc"
+	    ;;
+	  powerpc-*linux*)
+	    LD="${LD-ld} -m elf64ppc"
+	    ;;
+	  s390*-*linux*|s390*-*tpf*)
+	    LD="${LD-ld} -m elf64_s390"
+	    ;;
+	  sparc*-*linux*)
+	    LD="${LD-ld} -m elf64_sparc"
+	    ;;
+	esac
+	;;
+    esac
+  fi
+  rm -rf conftest*
+  ;;
+
+*-*-sco3.2v5*)
+  # On SCO OpenServer 5, we need -belf to get full-featured binaries.
+  SAVE_CFLAGS=$CFLAGS
+  CFLAGS="$CFLAGS -belf"
+  AC_CACHE_CHECK([whether the C compiler needs -belf], lt_cv_cc_needs_belf,
+    [AC_LANG_PUSH(C)
+     AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],[[]])],[lt_cv_cc_needs_belf=yes],[lt_cv_cc_needs_belf=no])
+     AC_LANG_POP])
+  if test yes != "$lt_cv_cc_needs_belf"; then
+    # this is probably gcc 2.8.0, egcs 1.0 or newer; no need for -belf
+    CFLAGS=$SAVE_CFLAGS
+  fi
+  ;;
+*-*solaris*)
+  # Find out what ABI is being produced by ac_compile, and set linker
+  # options accordingly.
+  echo 'int i;' > conftest.$ac_ext
+  if AC_TRY_EVAL(ac_compile); then
+    case `/usr/bin/file conftest.o` in
+    *64-bit*)
+      case $lt_cv_prog_gnu_ld in
+      yes*)
+        case $host in
+        i?86-*-solaris*|x86_64-*-solaris*)
+          LD="${LD-ld} -m elf_x86_64"
+          ;;
+        sparc*-*-solaris*)
+          LD="${LD-ld} -m elf64_sparc"
+          ;;
+        esac
+        # GNU ld 2.21 introduced _sol2 emulations.  Use them if available.
+        if ${LD-ld} -V | grep _sol2 >/dev/null 2>&1; then
+          LD=${LD-ld}_sol2
+        fi
+        ;;
+      *)
+	if ${LD-ld} -64 -r -o conftest2.o conftest.o >/dev/null 2>&1; then
+	  LD="${LD-ld} -64"
+	fi
+	;;
+      esac
+      ;;
+    esac
+  fi
+  rm -rf conftest*
+  ;;
+esac
+
+need_locks=$enable_libtool_lock
+])# _LT_ENABLE_LOCK
+
+
+# _LT_PROG_AR
+# -----------
+m4_defun([_LT_PROG_AR],
+[AC_CHECK_TOOLS(AR, [ar], false)
+: ${AR=ar}
+: ${AR_FLAGS=cru}
+_LT_DECL([], [AR], [1], [The archiver])
+_LT_DECL([], [AR_FLAGS], [1], [Flags to create an archive])
+
+AC_CACHE_CHECK([for archiver @FILE support], [lt_cv_ar_at_file],
+  [lt_cv_ar_at_file=no
+   AC_COMPILE_IFELSE([AC_LANG_PROGRAM],
+     [echo conftest.$ac_objext > conftest.lst
+      lt_ar_try='$AR $AR_FLAGS libconftest.a @conftest.lst >&AS_MESSAGE_LOG_FD'
+      AC_TRY_EVAL([lt_ar_try])
+      if test 0 -eq "$ac_status"; then
+	# Ensure the archiver fails upon bogus file names.
+	rm -f conftest.$ac_objext libconftest.a
+	AC_TRY_EVAL([lt_ar_try])
+	if test 0 -ne "$ac_status"; then
+          lt_cv_ar_at_file=@
+        fi
+      fi
+      rm -f conftest.* libconftest.a
+     ])
+  ])
+
+if test no = "$lt_cv_ar_at_file"; then
+  archiver_list_spec=
+else
+  archiver_list_spec=$lt_cv_ar_at_file
+fi
+_LT_DECL([], [archiver_list_spec], [1],
+  [How to feed a file listing to the archiver])
+])# _LT_PROG_AR
+
+
+# _LT_CMD_OLD_ARCHIVE
+# -------------------
+m4_defun([_LT_CMD_OLD_ARCHIVE],
+[_LT_PROG_AR
+
+AC_CHECK_TOOL(STRIP, strip, :)
+test -z "$STRIP" && STRIP=:
+_LT_DECL([], [STRIP], [1], [A symbol stripping program])
+
+AC_CHECK_TOOL(RANLIB, ranlib, :)
+test -z "$RANLIB" && RANLIB=:
+_LT_DECL([], [RANLIB], [1],
+    [Commands used to install an old-style archive])
+
+# Determine commands to create old-style static archives.
+old_archive_cmds='$AR $AR_FLAGS $oldlib$oldobjs'
+old_postinstall_cmds='chmod 644 $oldlib'
+old_postuninstall_cmds=
+
+if test -n "$RANLIB"; then
+  case $host_os in
+  bitrig* | openbsd*)
+    old_postinstall_cmds="$old_postinstall_cmds~\$RANLIB -t \$tool_oldlib"
+    ;;
+  *)
+    old_postinstall_cmds="$old_postinstall_cmds~\$RANLIB \$tool_oldlib"
+    ;;
+  esac
+  old_archive_cmds="$old_archive_cmds~\$RANLIB \$tool_oldlib"
+fi
+
+case $host_os in
+  darwin*)
+    lock_old_archive_extraction=yes ;;
+  *)
+    lock_old_archive_extraction=no ;;
+esac
+_LT_DECL([], [old_postinstall_cmds], [2])
+_LT_DECL([], [old_postuninstall_cmds], [2])
+_LT_TAGDECL([], [old_archive_cmds], [2],
+    [Commands used to build an old-style archive])
+_LT_DECL([], [lock_old_archive_extraction], [0],
+    [Whether to use a lock for old archive extraction])
+])# _LT_CMD_OLD_ARCHIVE
+
+
+# _LT_COMPILER_OPTION(MESSAGE, VARIABLE-NAME, FLAGS,
+#		[OUTPUT-FILE], [ACTION-SUCCESS], [ACTION-FAILURE])
+# ----------------------------------------------------------------
+# Check whether the given compiler option works
+AC_DEFUN([_LT_COMPILER_OPTION],
+[m4_require([_LT_FILEUTILS_DEFAULTS])dnl
+m4_require([_LT_DECL_SED])dnl
+AC_CACHE_CHECK([$1], [$2],
+  [$2=no
+   m4_if([$4], , [ac_outfile=conftest.$ac_objext], [ac_outfile=$4])
+   echo "$lt_simple_compile_test_code" > conftest.$ac_ext
+   lt_compiler_flag="$3"  ## exclude from sc_useless_quotes_in_assignment
+   # Insert the option either (1) after the last *FLAGS variable, or
+   # (2) before a word containing "conftest.", or (3) at the end.
+   # Note that $ac_compile itself does not contain backslashes and begins
+   # with a dollar sign (not a hyphen), so the echo should work correctly.
+   # The option is referenced via a variable to avoid confusing sed.
+   lt_compile=`echo "$ac_compile" | $SED \
+   -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
+   -e 's: [[^ ]]*conftest\.: $lt_compiler_flag&:; t' \
+   -e 's:$: $lt_compiler_flag:'`
+   (eval echo "\"\$as_me:$LINENO: $lt_compile\"" >&AS_MESSAGE_LOG_FD)
+   (eval "$lt_compile" 2>conftest.err)
+   ac_status=$?
+   cat conftest.err >&AS_MESSAGE_LOG_FD
+   echo "$as_me:$LINENO: \$? = $ac_status" >&AS_MESSAGE_LOG_FD
+   if (exit $ac_status) && test -s "$ac_outfile"; then
+     # The compiler can only warn and ignore the option if not recognized
+     # So say no if there are warnings other than the usual output.
+     $ECHO "$_lt_compiler_boilerplate" | $SED '/^$/d' >conftest.exp
+     $SED '/^$/d; /^ *+/d' conftest.err >conftest.er2
+     if test ! -s conftest.er2 || diff conftest.exp conftest.er2 >/dev/null; then
+       $2=yes
+     fi
+   fi
+   $RM conftest*
+])
+
+if test yes = "[$]$2"; then
+    m4_if([$5], , :, [$5])
+else
+    m4_if([$6], , :, [$6])
+fi
+])# _LT_COMPILER_OPTION
+
+# Old name:
+AU_ALIAS([AC_LIBTOOL_COMPILER_OPTION], [_LT_COMPILER_OPTION])
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([AC_LIBTOOL_COMPILER_OPTION], [])
+
+
+# _LT_LINKER_OPTION(MESSAGE, VARIABLE-NAME, FLAGS,
+#                  [ACTION-SUCCESS], [ACTION-FAILURE])
+# ----------------------------------------------------
+# Check whether the given linker option works
+AC_DEFUN([_LT_LINKER_OPTION],
+[m4_require([_LT_FILEUTILS_DEFAULTS])dnl
+m4_require([_LT_DECL_SED])dnl
+AC_CACHE_CHECK([$1], [$2],
+  [$2=no
+   save_LDFLAGS=$LDFLAGS
+   LDFLAGS="$LDFLAGS $3"
+   echo "$lt_simple_link_test_code" > conftest.$ac_ext
+   if (eval $ac_link 2>conftest.err) && test -s conftest$ac_exeext; then
+     # The linker can only warn and ignore the option if not recognized
+     # So say no if there are warnings
+     if test -s conftest.err; then
+       # Append any errors to the config.log.
+       cat conftest.err 1>&AS_MESSAGE_LOG_FD
+       $ECHO "$_lt_linker_boilerplate" | $SED '/^$/d' > conftest.exp
+       $SED '/^$/d; /^ *+/d' conftest.err >conftest.er2
+       if diff conftest.exp conftest.er2 >/dev/null; then
+         $2=yes
+       fi
+     else
+       $2=yes
+     fi
+   fi
+   $RM -r conftest*
+   LDFLAGS=$save_LDFLAGS
+])
+
+if test yes = "[$]$2"; then
+    m4_if([$4], , :, [$4])
+else
+    m4_if([$5], , :, [$5])
+fi
+])# _LT_LINKER_OPTION
+
+# Old name:
+AU_ALIAS([AC_LIBTOOL_LINKER_OPTION], [_LT_LINKER_OPTION])
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([AC_LIBTOOL_LINKER_OPTION], [])
+
+
+# LT_CMD_MAX_LEN
+#---------------
+AC_DEFUN([LT_CMD_MAX_LEN],
+[AC_REQUIRE([AC_CANONICAL_HOST])dnl
+# find the maximum length of command line arguments
+AC_MSG_CHECKING([the maximum length of command line arguments])
+AC_CACHE_VAL([lt_cv_sys_max_cmd_len], [dnl
+  i=0
+  teststring=ABCD
+
+  case $build_os in
+  msdosdjgpp*)
+    # On DJGPP, this test can blow up pretty badly due to problems in libc
+    # (any single argument exceeding 2000 bytes causes a buffer overrun
+    # during glob expansion).  Even if it were fixed, the result of this
+    # check would be larger than it should be.
+    lt_cv_sys_max_cmd_len=12288;    # 12K is about right
+    ;;
+
+  gnu*)
+    # Under GNU Hurd, this test is not required because there is
+    # no limit to the length of command line arguments.
+    # Libtool will interpret -1 as no limit whatsoever
+    lt_cv_sys_max_cmd_len=-1;
+    ;;
+
+  cygwin* | mingw* | cegcc*)
+    # On Win9x/ME, this test blows up -- it succeeds, but takes
+    # about 5 minutes as the teststring grows exponentially.
+    # Worse, since 9x/ME are not pre-emptively multitasking,
+    # you end up with a "frozen" computer, even though with patience
+    # the test eventually succeeds (with a max line length of 256k).
+    # Instead, let's just punt: use the minimum linelength reported by
+    # all of the supported platforms: 8192 (on NT/2K/XP).
+    lt_cv_sys_max_cmd_len=8192;
+    ;;
+
+  mint*)
+    # On MiNT this can take a long time and run out of memory.
+    lt_cv_sys_max_cmd_len=8192;
+    ;;
+
+  amigaos*)
+    # On AmigaOS with pdksh, this test takes hours, literally.
+    # So we just punt and use a minimum line length of 8192.
+    lt_cv_sys_max_cmd_len=8192;
+    ;;
+
+  bitrig* | darwin* | dragonfly* | freebsd* | netbsd* | openbsd*)
+    # This has been around since 386BSD, at least.  Likely further.
+    if test -x /sbin/sysctl; then
+      lt_cv_sys_max_cmd_len=`/sbin/sysctl -n kern.argmax`
+    elif test -x /usr/sbin/sysctl; then
+      lt_cv_sys_max_cmd_len=`/usr/sbin/sysctl -n kern.argmax`
+    else
+      lt_cv_sys_max_cmd_len=65536	# usable default for all BSDs
+    fi
+    # And add a safety zone
+    lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 4`
+    lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \* 3`
+    ;;
+
+  interix*)
+    # We know the value 262144 and hardcode it with a safety zone (like BSD)
+    lt_cv_sys_max_cmd_len=196608
+    ;;
+
+  os2*)
+    # The test takes a long time on OS/2.
+    lt_cv_sys_max_cmd_len=8192
+    ;;
+
+  osf*)
+    # Dr. Hans Ekkehard Plesser reports seeing a kernel panic running configure
+    # due to this test when exec_disable_arg_limit is 1 on Tru64. It is not
+    # nice to cause kernel panics so lets avoid the loop below.
+    # First set a reasonable default.
+    lt_cv_sys_max_cmd_len=16384
+    #
+    if test -x /sbin/sysconfig; then
+      case `/sbin/sysconfig -q proc exec_disable_arg_limit` in
+        *1*) lt_cv_sys_max_cmd_len=-1 ;;
+      esac
+    fi
+    ;;
+  sco3.2v5*)
+    lt_cv_sys_max_cmd_len=102400
+    ;;
+  sysv5* | sco5v6* | sysv4.2uw2*)
+    kargmax=`grep ARG_MAX /etc/conf/cf.d/stune 2>/dev/null`
+    if test -n "$kargmax"; then
+      lt_cv_sys_max_cmd_len=`echo $kargmax | sed 's/.*[[	 ]]//'`
+    else
+      lt_cv_sys_max_cmd_len=32768
+    fi
+    ;;
+  *)
+    lt_cv_sys_max_cmd_len=`(getconf ARG_MAX) 2> /dev/null`
+    if test -n "$lt_cv_sys_max_cmd_len" && \
+       test undefined != "$lt_cv_sys_max_cmd_len"; then
+      lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 4`
+      lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \* 3`
+    else
+      # Make teststring a little bigger before we do anything with it.
+      # a 1K string should be a reasonable start.
+      for i in 1 2 3 4 5 6 7 8; do
+        teststring=$teststring$teststring
+      done
+      SHELL=${SHELL-${CONFIG_SHELL-/bin/sh}}
+      # If test is not a shell built-in, we'll probably end up computing a
+      # maximum length that is only half of the actual maximum length, but
+      # we can't tell.
+      while { test X`env echo "$teststring$teststring" 2>/dev/null` \
+	         = "X$teststring$teststring"; } >/dev/null 2>&1 &&
+	      test 17 != "$i" # 1/2 MB should be enough
+      do
+        i=`expr $i + 1`
+        teststring=$teststring$teststring
+      done
+      # Only check the string length outside the loop.
+      lt_cv_sys_max_cmd_len=`expr "X$teststring" : ".*" 2>&1`
+      teststring=
+      # Add a significant safety factor because C++ compilers can tack on
+      # massive amounts of additional arguments before passing them to the
+      # linker.  It appears as though 1/2 is a usable value.
+      lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 2`
+    fi
+    ;;
+  esac
+])
+if test -n "$lt_cv_sys_max_cmd_len"; then
+  AC_MSG_RESULT($lt_cv_sys_max_cmd_len)
+else
+  AC_MSG_RESULT(none)
+fi
+max_cmd_len=$lt_cv_sys_max_cmd_len
+_LT_DECL([], [max_cmd_len], [0],
+    [What is the maximum length of a command?])
+])# LT_CMD_MAX_LEN
+
+# Old name:
+AU_ALIAS([AC_LIBTOOL_SYS_MAX_CMD_LEN], [LT_CMD_MAX_LEN])
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([AC_LIBTOOL_SYS_MAX_CMD_LEN], [])
+
+
+# _LT_HEADER_DLFCN
+# ----------------
+m4_defun([_LT_HEADER_DLFCN],
+[AC_CHECK_HEADERS([dlfcn.h], [], [], [AC_INCLUDES_DEFAULT])dnl
+])# _LT_HEADER_DLFCN
+
+
+# _LT_TRY_DLOPEN_SELF (ACTION-IF-TRUE, ACTION-IF-TRUE-W-USCORE,
+#                      ACTION-IF-FALSE, ACTION-IF-CROSS-COMPILING)
+# ----------------------------------------------------------------
+m4_defun([_LT_TRY_DLOPEN_SELF],
+[m4_require([_LT_HEADER_DLFCN])dnl
+if test yes = "$cross_compiling"; then :
+  [$4]
+else
+  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
+  lt_status=$lt_dlunknown
+  cat > conftest.$ac_ext <<_LT_EOF
+[#line $LINENO "configure"
+#include "confdefs.h"
+
+#if HAVE_DLFCN_H
+#include <dlfcn.h>
+#endif
+
+#include <stdio.h>
+
+#ifdef RTLD_GLOBAL
+#  define LT_DLGLOBAL		RTLD_GLOBAL
+#else
+#  ifdef DL_GLOBAL
+#    define LT_DLGLOBAL		DL_GLOBAL
+#  else
+#    define LT_DLGLOBAL		0
+#  endif
+#endif
+
+/* We may have to define LT_DLLAZY_OR_NOW in the command line if we
+   find out it does not work in some platform. */
+#ifndef LT_DLLAZY_OR_NOW
+#  ifdef RTLD_LAZY
+#    define LT_DLLAZY_OR_NOW		RTLD_LAZY
+#  else
+#    ifdef DL_LAZY
+#      define LT_DLLAZY_OR_NOW		DL_LAZY
+#    else
+#      ifdef RTLD_NOW
+#        define LT_DLLAZY_OR_NOW	RTLD_NOW
+#      else
+#        ifdef DL_NOW
+#          define LT_DLLAZY_OR_NOW	DL_NOW
+#        else
+#          define LT_DLLAZY_OR_NOW	0
+#        endif
+#      endif
+#    endif
+#  endif
+#endif
+
+/* When -fvisibility=hidden is used, assume the code has been annotated
+   correspondingly for the symbols needed.  */
+#if defined __GNUC__ && (((__GNUC__ == 3) && (__GNUC_MINOR__ >= 3)) || (__GNUC__ > 3))
+int fnord () __attribute__((visibility("default")));
+#endif
+
+int fnord () { return 42; }
+int main ()
+{
+  void *self = dlopen (0, LT_DLGLOBAL|LT_DLLAZY_OR_NOW);
+  int status = $lt_dlunknown;
+
+  if (self)
+    {
+      if (dlsym (self,"fnord"))       status = $lt_dlno_uscore;
+      else
+        {
+	  if (dlsym( self,"_fnord"))  status = $lt_dlneed_uscore;
+          else puts (dlerror ());
+	}
+      /* dlclose (self); */
+    }
+  else
+    puts (dlerror ());
+
+  return status;
+}]
+_LT_EOF
+  if AC_TRY_EVAL(ac_link) && test -s "conftest$ac_exeext" 2>/dev/null; then
+    (./conftest; exit; ) >&AS_MESSAGE_LOG_FD 2>/dev/null
+    lt_status=$?
+    case x$lt_status in
+      x$lt_dlno_uscore) $1 ;;
+      x$lt_dlneed_uscore) $2 ;;
+      x$lt_dlunknown|x*) $3 ;;
+    esac
+  else :
+    # compilation failed
+    $3
+  fi
+fi
+rm -fr conftest*
+])# _LT_TRY_DLOPEN_SELF
+
+
+# LT_SYS_DLOPEN_SELF
+# ------------------
+AC_DEFUN([LT_SYS_DLOPEN_SELF],
+[m4_require([_LT_HEADER_DLFCN])dnl
+if test yes != "$enable_dlopen"; then
+  enable_dlopen=unknown
+  enable_dlopen_self=unknown
+  enable_dlopen_self_static=unknown
+else
+  lt_cv_dlopen=no
+  lt_cv_dlopen_libs=
+
+  case $host_os in
+  beos*)
+    lt_cv_dlopen=load_add_on
+    lt_cv_dlopen_libs=
+    lt_cv_dlopen_self=yes
+    ;;
+
+  mingw* | pw32* | cegcc*)
+    lt_cv_dlopen=LoadLibrary
+    lt_cv_dlopen_libs=
+    ;;
+
+  cygwin*)
+    lt_cv_dlopen=dlopen
+    lt_cv_dlopen_libs=
+    ;;
+
+  darwin*)
+    # if libdl is installed we need to link against it
+    AC_CHECK_LIB([dl], [dlopen],
+		[lt_cv_dlopen=dlopen lt_cv_dlopen_libs=-ldl],[
+    lt_cv_dlopen=dyld
+    lt_cv_dlopen_libs=
+    lt_cv_dlopen_self=yes
+    ])
+    ;;
+
+  tpf*)
+    # Don't try to run any link tests for TPF.  We know it's impossible
+    # because TPF is a cross-compiler, and we know how we open DSOs.
+    lt_cv_dlopen=dlopen
+    lt_cv_dlopen_libs=
+    lt_cv_dlopen_self=no
+    ;;
+
+  *)
+    AC_CHECK_FUNC([shl_load],
+	  [lt_cv_dlopen=shl_load],
+      [AC_CHECK_LIB([dld], [shl_load],
+	    [lt_cv_dlopen=shl_load lt_cv_dlopen_libs=-ldld],
+	[AC_CHECK_FUNC([dlopen],
+	      [lt_cv_dlopen=dlopen],
+	  [AC_CHECK_LIB([dl], [dlopen],
+		[lt_cv_dlopen=dlopen lt_cv_dlopen_libs=-ldl],
+	    [AC_CHECK_LIB([svld], [dlopen],
+		  [lt_cv_dlopen=dlopen lt_cv_dlopen_libs=-lsvld],
+	      [AC_CHECK_LIB([dld], [dld_link],
+		    [lt_cv_dlopen=dld_link lt_cv_dlopen_libs=-ldld])
+	      ])
+	    ])
+	  ])
+	])
+      ])
+    ;;
+  esac
+
+  if test no = "$lt_cv_dlopen"; then
+    enable_dlopen=no
+  else
+    enable_dlopen=yes
+  fi
+
+  case $lt_cv_dlopen in
+  dlopen)
+    save_CPPFLAGS=$CPPFLAGS
+    test yes = "$ac_cv_header_dlfcn_h" && CPPFLAGS="$CPPFLAGS -DHAVE_DLFCN_H"
+
+    save_LDFLAGS=$LDFLAGS
+    wl=$lt_prog_compiler_wl eval LDFLAGS=\"\$LDFLAGS $export_dynamic_flag_spec\"
+
+    save_LIBS=$LIBS
+    LIBS="$lt_cv_dlopen_libs $LIBS"
+
+    AC_CACHE_CHECK([whether a program can dlopen itself],
+	  lt_cv_dlopen_self, [dnl
+	  _LT_TRY_DLOPEN_SELF(
+	    lt_cv_dlopen_self=yes, lt_cv_dlopen_self=yes,
+	    lt_cv_dlopen_self=no, lt_cv_dlopen_self=cross)
+    ])
+
+    if test yes = "$lt_cv_dlopen_self"; then
+      wl=$lt_prog_compiler_wl eval LDFLAGS=\"\$LDFLAGS $lt_prog_compiler_static\"
+      AC_CACHE_CHECK([whether a statically linked program can dlopen itself],
+	  lt_cv_dlopen_self_static, [dnl
+	  _LT_TRY_DLOPEN_SELF(
+	    lt_cv_dlopen_self_static=yes, lt_cv_dlopen_self_static=yes,
+	    lt_cv_dlopen_self_static=no,  lt_cv_dlopen_self_static=cross)
+      ])
+    fi
+
+    CPPFLAGS=$save_CPPFLAGS
+    LDFLAGS=$save_LDFLAGS
+    LIBS=$save_LIBS
+    ;;
+  esac
+
+  case $lt_cv_dlopen_self in
+  yes|no) enable_dlopen_self=$lt_cv_dlopen_self ;;
+  *) enable_dlopen_self=unknown ;;
+  esac
+
+  case $lt_cv_dlopen_self_static in
+  yes|no) enable_dlopen_self_static=$lt_cv_dlopen_self_static ;;
+  *) enable_dlopen_self_static=unknown ;;
+  esac
+fi
+_LT_DECL([dlopen_support], [enable_dlopen], [0],
+	 [Whether dlopen is supported])
+_LT_DECL([dlopen_self], [enable_dlopen_self], [0],
+	 [Whether dlopen of programs is supported])
+_LT_DECL([dlopen_self_static], [enable_dlopen_self_static], [0],
+	 [Whether dlopen of statically linked programs is supported])
+])# LT_SYS_DLOPEN_SELF
+
+# Old name:
+AU_ALIAS([AC_LIBTOOL_DLOPEN_SELF], [LT_SYS_DLOPEN_SELF])
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([AC_LIBTOOL_DLOPEN_SELF], [])
+
+
+# _LT_COMPILER_C_O([TAGNAME])
+# ---------------------------
+# Check to see if options -c and -o are simultaneously supported by compiler.
+# This macro does not hard code the compiler like AC_PROG_CC_C_O.
+m4_defun([_LT_COMPILER_C_O],
+[m4_require([_LT_DECL_SED])dnl
+m4_require([_LT_FILEUTILS_DEFAULTS])dnl
+m4_require([_LT_TAG_COMPILER])dnl
+AC_CACHE_CHECK([if $compiler supports -c -o file.$ac_objext],
+  [_LT_TAGVAR(lt_cv_prog_compiler_c_o, $1)],
+  [_LT_TAGVAR(lt_cv_prog_compiler_c_o, $1)=no
+   $RM -r conftest 2>/dev/null
+   mkdir conftest
+   cd conftest
+   mkdir out
+   echo "$lt_simple_compile_test_code" > conftest.$ac_ext
+
+   lt_compiler_flag="-o out/conftest2.$ac_objext"
+   # Insert the option either (1) after the last *FLAGS variable, or
+   # (2) before a word containing "conftest.", or (3) at the end.
+   # Note that $ac_compile itself does not contain backslashes and begins
+   # with a dollar sign (not a hyphen), so the echo should work correctly.
+   lt_compile=`echo "$ac_compile" | $SED \
+   -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
+   -e 's: [[^ ]]*conftest\.: $lt_compiler_flag&:; t' \
+   -e 's:$: $lt_compiler_flag:'`
+   (eval echo "\"\$as_me:$LINENO: $lt_compile\"" >&AS_MESSAGE_LOG_FD)
+   (eval "$lt_compile" 2>out/conftest.err)
+   ac_status=$?
+   cat out/conftest.err >&AS_MESSAGE_LOG_FD
+   echo "$as_me:$LINENO: \$? = $ac_status" >&AS_MESSAGE_LOG_FD
+   if (exit $ac_status) && test -s out/conftest2.$ac_objext
+   then
+     # The compiler can only warn and ignore the option if not recognized
+     # So say no if there are warnings
+     $ECHO "$_lt_compiler_boilerplate" | $SED '/^$/d' > out/conftest.exp
+     $SED '/^$/d; /^ *+/d' out/conftest.err >out/conftest.er2
+     if test ! -s out/conftest.er2 || diff out/conftest.exp out/conftest.er2 >/dev/null; then
+       _LT_TAGVAR(lt_cv_prog_compiler_c_o, $1)=yes
+     fi
+   fi
+   chmod u+w . 2>&AS_MESSAGE_LOG_FD
+   $RM conftest*
+   # SGI C++ compiler will create directory out/ii_files/ for
+   # template instantiation
+   test -d out/ii_files && $RM out/ii_files/* && rmdir out/ii_files
+   $RM out/* && rmdir out
+   cd ..
+   $RM -r conftest
+   $RM conftest*
+])
+_LT_TAGDECL([compiler_c_o], [lt_cv_prog_compiler_c_o], [1],
+	[Does compiler simultaneously support -c and -o options?])
+])# _LT_COMPILER_C_O
+
+
+# _LT_COMPILER_FILE_LOCKS([TAGNAME])
+# ----------------------------------
+# Check to see if we can do hard links to lock some files if needed
+m4_defun([_LT_COMPILER_FILE_LOCKS],
+[m4_require([_LT_ENABLE_LOCK])dnl
+m4_require([_LT_FILEUTILS_DEFAULTS])dnl
+_LT_COMPILER_C_O([$1])
+
+hard_links=nottested
+if test no = "$_LT_TAGVAR(lt_cv_prog_compiler_c_o, $1)" && test no != "$need_locks"; then
+  # do not overwrite the value of need_locks provided by the user
+  AC_MSG_CHECKING([if we can lock with hard links])
+  hard_links=yes
+  $RM conftest*
+  ln conftest.a conftest.b 2>/dev/null && hard_links=no
+  touch conftest.a
+  ln conftest.a conftest.b 2>&5 || hard_links=no
+  ln conftest.a conftest.b 2>/dev/null && hard_links=no
+  AC_MSG_RESULT([$hard_links])
+  if test no = "$hard_links"; then
+    AC_MSG_WARN(['$CC' does not support '-c -o', so 'make -j' may be unsafe])
+    need_locks=warn
+  fi
+else
+  need_locks=no
+fi
+_LT_DECL([], [need_locks], [1], [Must we lock files when doing compilation?])
+])# _LT_COMPILER_FILE_LOCKS
+
+
+# _LT_CHECK_OBJDIR
+# ----------------
+m4_defun([_LT_CHECK_OBJDIR],
+[AC_CACHE_CHECK([for objdir], [lt_cv_objdir],
+[rm -f .libs 2>/dev/null
+mkdir .libs 2>/dev/null
+if test -d .libs; then
+  lt_cv_objdir=.libs
+else
+  # MS-DOS does not allow filenames that begin with a dot.
+  lt_cv_objdir=_libs
+fi
+rmdir .libs 2>/dev/null])
+objdir=$lt_cv_objdir
+_LT_DECL([], [objdir], [0],
+         [The name of the directory that contains temporary libtool files])dnl
+m4_pattern_allow([LT_OBJDIR])dnl
+AC_DEFINE_UNQUOTED([LT_OBJDIR], "$lt_cv_objdir/",
+  [Define to the sub-directory where libtool stores uninstalled libraries.])
+])# _LT_CHECK_OBJDIR
+
+
+# _LT_LINKER_HARDCODE_LIBPATH([TAGNAME])
+# --------------------------------------
+# Check hardcoding attributes.
+m4_defun([_LT_LINKER_HARDCODE_LIBPATH],
+[AC_MSG_CHECKING([how to hardcode library paths into programs])
+_LT_TAGVAR(hardcode_action, $1)=
+if test -n "$_LT_TAGVAR(hardcode_libdir_flag_spec, $1)" ||
+   test -n "$_LT_TAGVAR(runpath_var, $1)" ||
+   test yes = "$_LT_TAGVAR(hardcode_automatic, $1)"; then
+
+  # We can hardcode non-existent directories.
+  if test no != "$_LT_TAGVAR(hardcode_direct, $1)" &&
+     # If the only mechanism to avoid hardcoding is shlibpath_var, we
+     # have to relink, otherwise we might link with an installed library
+     # when we should be linking with a yet-to-be-installed one
+     ## test no != "$_LT_TAGVAR(hardcode_shlibpath_var, $1)" &&
+     test no != "$_LT_TAGVAR(hardcode_minus_L, $1)"; then
+    # Linking always hardcodes the temporary library directory.
+    _LT_TAGVAR(hardcode_action, $1)=relink
+  else
+    # We can link without hardcoding, and we can hardcode nonexisting dirs.
+    _LT_TAGVAR(hardcode_action, $1)=immediate
+  fi
+else
+  # We cannot hardcode anything, or else we can only hardcode existing
+  # directories.
+  _LT_TAGVAR(hardcode_action, $1)=unsupported
+fi
+AC_MSG_RESULT([$_LT_TAGVAR(hardcode_action, $1)])
+
+if test relink = "$_LT_TAGVAR(hardcode_action, $1)" ||
+   test yes = "$_LT_TAGVAR(inherit_rpath, $1)"; then
+  # Fast installation is not supported
+  enable_fast_install=no
+elif test yes = "$shlibpath_overrides_runpath" ||
+     test no = "$enable_shared"; then
+  # Fast installation is not necessary
+  enable_fast_install=needless
+fi
+_LT_TAGDECL([], [hardcode_action], [0],
+    [How to hardcode a shared library path into an executable])
+])# _LT_LINKER_HARDCODE_LIBPATH
+
+
+# _LT_CMD_STRIPLIB
+# ----------------
+m4_defun([_LT_CMD_STRIPLIB],
+[m4_require([_LT_DECL_EGREP])
+striplib=
+old_striplib=
+AC_MSG_CHECKING([whether stripping libraries is possible])
+if test -n "$STRIP" && $STRIP -V 2>&1 | $GREP "GNU strip" >/dev/null; then
+  test -z "$old_striplib" && old_striplib="$STRIP --strip-debug"
+  test -z "$striplib" && striplib="$STRIP --strip-unneeded"
+  AC_MSG_RESULT([yes])
+else
+# FIXME - insert some real tests, host_os isn't really good enough
+  case $host_os in
+  darwin*)
+    if test -n "$STRIP"; then
+      striplib="$STRIP -x"
+      old_striplib="$STRIP -S"
+      AC_MSG_RESULT([yes])
+    else
+      AC_MSG_RESULT([no])
+    fi
+    ;;
+  *)
+    AC_MSG_RESULT([no])
+    ;;
+  esac
+fi
+_LT_DECL([], [old_striplib], [1], [Commands to strip libraries])
+_LT_DECL([], [striplib], [1])
+])# _LT_CMD_STRIPLIB
+
+
+# _LT_PREPARE_MUNGE_PATH_LIST
+# ---------------------------
+# Make sure func_munge_path_list() is defined correctly.
+m4_defun([_LT_PREPARE_MUNGE_PATH_LIST],
+[[# func_munge_path_list VARIABLE PATH
+# -----------------------------------
+# VARIABLE is name of variable containing _space_ separated list of
+# directories to be munged by the contents of PATH, which is string
+# having a format:
+# "DIR[:DIR]:"
+#       string "DIR[ DIR]" will be prepended to VARIABLE
+# ":DIR[:DIR]"
+#       string "DIR[ DIR]" will be appended to VARIABLE
+# "DIRP[:DIRP]::[DIRA:]DIRA"
+#       string "DIRP[ DIRP]" will be prepended to VARIABLE and string
+#       "DIRA[ DIRA]" will be appended to VARIABLE
+# "DIR[:DIR]"
+#       VARIABLE will be replaced by "DIR[ DIR]"
+func_munge_path_list ()
+{
+    case x@S|@2 in
+    x)
+        ;;
+    *:)
+        eval @S|@1=\"`$ECHO @S|@2 | $SED 's/:/ /g'` \@S|@@S|@1\"
+        ;;
+    x:*)
+        eval @S|@1=\"\@S|@@S|@1 `$ECHO @S|@2 | $SED 's/:/ /g'`\"
+        ;;
+    *::*)
+        eval @S|@1=\"\@S|@@S|@1\ `$ECHO @S|@2 | $SED -e 's/.*:://' -e 's/:/ /g'`\"
+        eval @S|@1=\"`$ECHO @S|@2 | $SED -e 's/::.*//' -e 's/:/ /g'`\ \@S|@@S|@1\"
+        ;;
+    *)
+        eval @S|@1=\"`$ECHO @S|@2 | $SED 's/:/ /g'`\"
+        ;;
+    esac
+}
+]])# _LT_PREPARE_PATH_LIST
+
+
+# _LT_SYS_DYNAMIC_LINKER([TAG])
+# -----------------------------
+# PORTME Fill in your ld.so characteristics
+m4_defun([_LT_SYS_DYNAMIC_LINKER],
+[AC_REQUIRE([AC_CANONICAL_HOST])dnl
+m4_require([_LT_DECL_EGREP])dnl
+m4_require([_LT_FILEUTILS_DEFAULTS])dnl
+m4_require([_LT_DECL_OBJDUMP])dnl
+m4_require([_LT_DECL_SED])dnl
+m4_require([_LT_CHECK_SHELL_FEATURES])dnl
+m4_require([_LT_PREPARE_MUNGE_PATH_LIST])dnl
+AC_MSG_CHECKING([dynamic linker characteristics])
+m4_if([$1],
+	[], [
+if test yes = "$GCC"; then
+  case $host_os in
+    darwin*) lt_awk_arg='/^libraries:/,/LR/' ;;
+    *) lt_awk_arg='/^libraries:/' ;;
+  esac
+  case $host_os in
+    mingw* | cegcc*) lt_sed_strip_eq='s|=\([[A-Za-z]]:\)|\1|g' ;;
+    *) lt_sed_strip_eq='s|=/|/|g' ;;
+  esac
+  lt_search_path_spec=`$CC -print-search-dirs | awk $lt_awk_arg | $SED -e "s/^libraries://" -e $lt_sed_strip_eq`
+  case $lt_search_path_spec in
+  *\;*)
+    # if the path contains ";" then we assume it to be the separator
+    # otherwise default to the standard path separator (i.e. ":") - it is
+    # assumed that no part of a normal pathname contains ";" but that should
+    # okay in the real world where ";" in dirpaths is itself problematic.
+    lt_search_path_spec=`$ECHO "$lt_search_path_spec" | $SED 's/;/ /g'`
+    ;;
+  *)
+    lt_search_path_spec=`$ECHO "$lt_search_path_spec" | $SED "s/$PATH_SEPARATOR/ /g"`
+    ;;
+  esac
+  # Ok, now we have the path, separated by spaces, we can step through it
+  # and add multilib dir if necessary...
+  lt_tmp_lt_search_path_spec=
+  lt_multi_os_dir=/`$CC $CPPFLAGS $CFLAGS $LDFLAGS -print-multi-os-directory 2>/dev/null`
+  # ...but if some path component already ends with the multilib dir we assume
+  # that all is fine and trust -print-search-dirs as is (GCC 4.2? or newer).
+  case "$lt_multi_os_dir; $lt_search_path_spec " in
+  "/; "* | "/.; "* | "/./; "* | *"$lt_multi_os_dir "* | *"$lt_multi_os_dir/ "*)
+    lt_multi_os_dir=
+    ;;
+  esac
+  for lt_sys_path in $lt_search_path_spec; do
+    if test -d "$lt_sys_path$lt_multi_os_dir"; then
+      lt_tmp_lt_search_path_spec="$lt_tmp_lt_search_path_spec $lt_sys_path$lt_multi_os_dir"
+    elif test -n "$lt_multi_os_dir"; then
+      test -d "$lt_sys_path" && \
+	lt_tmp_lt_search_path_spec="$lt_tmp_lt_search_path_spec $lt_sys_path"
+    fi
+  done
+  lt_search_path_spec=`$ECHO "$lt_tmp_lt_search_path_spec" | awk '
+BEGIN {RS = " "; FS = "/|\n";} {
+  lt_foo = "";
+  lt_count = 0;
+  for (lt_i = NF; lt_i > 0; lt_i--) {
+    if ($lt_i != "" && $lt_i != ".") {
+      if ($lt_i == "..") {
+        lt_count++;
+      } else {
+        if (lt_count == 0) {
+          lt_foo = "/" $lt_i lt_foo;
+        } else {
+          lt_count--;
+        }
+      }
+    }
+  }
+  if (lt_foo != "") { lt_freq[[lt_foo]]++; }
+  if (lt_freq[[lt_foo]] == 1) { print lt_foo; }
+}'`
+  # AWK program above erroneously prepends '/' to C:/dos/paths
+  # for these hosts.
+  case $host_os in
+    mingw* | cegcc*) lt_search_path_spec=`$ECHO "$lt_search_path_spec" |\
+      $SED 's|/\([[A-Za-z]]:\)|\1|g'` ;;
+  esac
+  sys_lib_search_path_spec=`$ECHO "$lt_search_path_spec" | $lt_NL2SP`
+else
+  sys_lib_search_path_spec="/lib /usr/lib /usr/local/lib"
+fi])
+library_names_spec=
+libname_spec='lib$name'
+soname_spec=
+shrext_cmds=.so
+postinstall_cmds=
+postuninstall_cmds=
+finish_cmds=
+finish_eval=
+shlibpath_var=
+shlibpath_overrides_runpath=unknown
+version_type=none
+dynamic_linker="$host_os ld.so"
+sys_lib_dlsearch_path_spec="/lib /usr/lib"
+need_lib_prefix=unknown
+hardcode_into_libs=no
+
+# when you set need_version to no, make sure it does not cause -set_version
+# flags to be left without arguments
+need_version=unknown
+
+AC_ARG_VAR([LT_SYS_LIBRARY_PATH],
+[User-defined run-time library search path.])
+
+case $host_os in
+aix3*)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  library_names_spec='$libname$release$shared_ext$versuffix $libname.a'
+  shlibpath_var=LIBPATH
+
+  # AIX 3 has no versioning support, so we append a major version to the name.
+  soname_spec='$libname$release$shared_ext$major'
+  ;;
+
+aix[[4-9]]*)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  need_lib_prefix=no
+  need_version=no
+  hardcode_into_libs=yes
+  if test ia64 = "$host_cpu"; then
+    # AIX 5 supports IA64
+    library_names_spec='$libname$release$shared_ext$major $libname$release$shared_ext$versuffix $libname$shared_ext'
+    shlibpath_var=LD_LIBRARY_PATH
+  else
+    # With GCC up to 2.95.x, collect2 would create an import file
+    # for dependence libraries.  The import file would start with
+    # the line '#! .'.  This would cause the generated library to
+    # depend on '.', always an invalid library.  This was fixed in
+    # development snapshots of GCC prior to 3.0.
+    case $host_os in
+      aix4 | aix4.[[01]] | aix4.[[01]].*)
+      if { echo '#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 97)'
+	   echo ' yes '
+	   echo '#endif'; } | $CC -E - | $GREP yes > /dev/null; then
+	:
+      else
+	can_build_shared=no
+      fi
+      ;;
+    esac
+    # Using Import Files as archive members, it is possible to support
+    # filename-based versioning of shared library archives on AIX. While
+    # this would work for both with and without runtime linking, it will
+    # prevent static linking of such archives. So we do filename-based
+    # shared library versioning with .so extension only, which is used
+    # when both runtime linking and shared linking is enabled.
+    # Unfortunately, runtime linking may impact performance, so we do
+    # not want this to be the default eventually. Also, we use the
+    # versioned .so libs for executables only if there is the -brtl
+    # linker flag in LDFLAGS as well, or --with-aix-soname=svr4 only.
+    # To allow for filename-based versioning support, we need to create
+    # libNAME.so.V as an archive file, containing:
+    # *) an Import File, referring to the versioned filename of the
+    #    archive as well as the shared archive member, telling the
+    #    bitwidth (32 or 64) of that shared object, and providing the
+    #    list of exported symbols of that shared object, eventually
+    #    decorated with the 'weak' keyword
+    # *) the shared object with the F_LOADONLY flag set, to really avoid
+    #    it being seen by the linker.
+    # At run time we better use the real file rather than another symlink,
+    # but for link time we create the symlink libNAME.so -> libNAME.so.V
+
+    case $with_aix_soname,$aix_use_runtimelinking in
+    # AIX (on Power*) has no versioning support, so currently we cannot hardcode correct
+    # soname into executable. Probably we can add versioning support to
+    # collect2, so additional links can be useful in future.
+    aix,yes) # traditional libtool
+      dynamic_linker='AIX unversionable lib.so'
+      # If using run time linking (on AIX 4.2 or later) use lib<name>.so
+      # instead of lib<name>.a to let people know that these are not
+      # typical AIX shared libraries.
+      library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+      ;;
+    aix,no) # traditional AIX only
+      dynamic_linker='AIX lib.a[(]lib.so.V[)]'
+      # We preserve .a as extension for shared libraries through AIX4.2
+      # and later when we are not doing run time linking.
+      library_names_spec='$libname$release.a $libname.a'
+      soname_spec='$libname$release$shared_ext$major'
+      ;;
+    svr4,*) # full svr4 only
+      dynamic_linker="AIX lib.so.V[(]$shared_archive_member_spec.o[)]"
+      library_names_spec='$libname$release$shared_ext$major $libname$shared_ext'
+      # We do not specify a path in Import Files, so LIBPATH fires.
+      shlibpath_overrides_runpath=yes
+      ;;
+    *,yes) # both, prefer svr4
+      dynamic_linker="AIX lib.so.V[(]$shared_archive_member_spec.o[)], lib.a[(]lib.so.V[)]"
+      library_names_spec='$libname$release$shared_ext$major $libname$shared_ext'
+      # unpreferred sharedlib libNAME.a needs extra handling
+      postinstall_cmds='test -n "$linkname" || linkname="$realname"~func_stripname "" ".so" "$linkname"~$install_shared_prog "$dir/$func_stripname_result.$libext" "$destdir/$func_stripname_result.$libext"~test -z "$tstripme" || test -z "$striplib" || $striplib "$destdir/$func_stripname_result.$libext"'
+      postuninstall_cmds='for n in $library_names $old_library; do :; done~func_stripname "" ".so" "$n"~test "$func_stripname_result" = "$n" || func_append rmfiles " $odir/$func_stripname_result.$libext"'
+      # We do not specify a path in Import Files, so LIBPATH fires.
+      shlibpath_overrides_runpath=yes
+      ;;
+    *,no) # both, prefer aix
+      dynamic_linker="AIX lib.a[(]lib.so.V[)], lib.so.V[(]$shared_archive_member_spec.o[)]"
+      library_names_spec='$libname$release.a $libname.a'
+      soname_spec='$libname$release$shared_ext$major'
+      # unpreferred sharedlib libNAME.so.V and symlink libNAME.so need extra handling
+      postinstall_cmds='test -z "$dlname" || $install_shared_prog $dir/$dlname $destdir/$dlname~test -z "$tstripme" || test -z "$striplib" || $striplib $destdir/$dlname~test -n "$linkname" || linkname=$realname~func_stripname "" ".a" "$linkname"~(cd "$destdir" && $LN_S -f $dlname $func_stripname_result.so)'
+      postuninstall_cmds='test -z "$dlname" || func_append rmfiles " $odir/$dlname"~for n in $old_library $library_names; do :; done~func_stripname "" ".a" "$n"~func_append rmfiles " $odir/$func_stripname_result.so"'
+      ;;
+    esac
+    shlibpath_var=LIBPATH
+  fi
+  ;;
+
+amigaos*)
+  case $host_cpu in
+  powerpc)
+    # Since July 2007 AmigaOS4 officially supports .so libraries.
+    # When compiling the executable, add -use-dynld -Lsobjs: to the compileline.
+    library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+    ;;
+  m68k)
+    library_names_spec='$libname.ixlibrary $libname.a'
+    # Create ${libname}_ixlibrary.a entries in /sys/libs.
+    finish_eval='for lib in `ls $libdir/*.ixlibrary 2>/dev/null`; do libname=`func_echo_all "$lib" | $SED '\''s%^.*/\([[^/]]*\)\.ixlibrary$%\1%'\''`; $RM /sys/libs/${libname}_ixlibrary.a; $show "cd /sys/libs && $LN_S $lib ${libname}_ixlibrary.a"; cd /sys/libs && $LN_S $lib ${libname}_ixlibrary.a || exit 1; done'
+    ;;
+  esac
+  ;;
+
+beos*)
+  library_names_spec='$libname$shared_ext'
+  dynamic_linker="$host_os ld.so"
+  shlibpath_var=LIBRARY_PATH
+  ;;
+
+bsdi[[45]]*)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  need_version=no
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  soname_spec='$libname$release$shared_ext$major'
+  finish_cmds='PATH="\$PATH:/sbin" ldconfig $libdir'
+  shlibpath_var=LD_LIBRARY_PATH
+  sys_lib_search_path_spec="/shlib /usr/lib /usr/X11/lib /usr/contrib/lib /lib /usr/local/lib"
+  sys_lib_dlsearch_path_spec="/shlib /usr/lib /usr/local/lib"
+  # the default ld.so.conf also contains /usr/contrib/lib and
+  # /usr/X11R6/lib (/usr/X11 is a link to /usr/X11R6), but let us allow
+  # libtool to hard-code these into programs
+  ;;
+
+cygwin* | mingw* | pw32* | cegcc*)
+  version_type=windows
+  shrext_cmds=.dll
+  need_version=no
+  need_lib_prefix=no
+
+  case $GCC,$cc_basename in
+  yes,*)
+    # gcc
+    library_names_spec='$libname.dll.a'
+    # DLL is installed to $(libdir)/../bin by postinstall_cmds
+    postinstall_cmds='base_file=`basename \$file`~
+      dlpath=`$SHELL 2>&1 -c '\''. $dir/'\''\$base_file'\''i; echo \$dlname'\''`~
+      dldir=$destdir/`dirname \$dlpath`~
+      test -d \$dldir || mkdir -p \$dldir~
+      $install_prog $dir/$dlname \$dldir/$dlname~
+      chmod a+x \$dldir/$dlname~
+      if test -n '\''$stripme'\'' && test -n '\''$striplib'\''; then
+        eval '\''$striplib \$dldir/$dlname'\'' || exit \$?;
+      fi'
+    postuninstall_cmds='dldll=`$SHELL 2>&1 -c '\''. $file; echo \$dlname'\''`~
+      dlpath=$dir/\$dldll~
+       $RM \$dlpath'
+    shlibpath_overrides_runpath=yes
+
+    case $host_os in
+    cygwin*)
+      # Cygwin DLLs use 'cyg' prefix rather than 'lib'
+      soname_spec='`echo $libname | sed -e 's/^lib/cyg/'``echo $release | $SED -e 's/[[.]]/-/g'`$versuffix$shared_ext'
+m4_if([$1], [],[
+      sys_lib_search_path_spec="$sys_lib_search_path_spec /usr/lib/w32api"])
+      ;;
+    mingw* | cegcc*)
+      # MinGW DLLs use traditional 'lib' prefix
+      soname_spec='$libname`echo $release | $SED -e 's/[[.]]/-/g'`$versuffix$shared_ext'
+      ;;
+    pw32*)
+      # pw32 DLLs use 'pw' prefix rather than 'lib'
+      library_names_spec='`echo $libname | sed -e 's/^lib/pw/'``echo $release | $SED -e 's/[[.]]/-/g'`$versuffix$shared_ext'
+      ;;
+    esac
+    dynamic_linker='Win32 ld.exe'
+    ;;
+
+  *,cl*)
+    # Native MSVC
+    libname_spec='$name'
+    soname_spec='$libname`echo $release | $SED -e 's/[[.]]/-/g'`$versuffix$shared_ext'
+    library_names_spec='$libname.dll.lib'
+
+    case $build_os in
+    mingw*)
+      sys_lib_search_path_spec=
+      lt_save_ifs=$IFS
+      IFS=';'
+      for lt_path in $LIB
+      do
+        IFS=$lt_save_ifs
+        # Let DOS variable expansion print the short 8.3 style file name.
+        lt_path=`cd "$lt_path" 2>/dev/null && cmd //C "for %i in (".") do @echo %~si"`
+        sys_lib_search_path_spec="$sys_lib_search_path_spec $lt_path"
+      done
+      IFS=$lt_save_ifs
+      # Convert to MSYS style.
+      sys_lib_search_path_spec=`$ECHO "$sys_lib_search_path_spec" | sed -e 's|\\\\|/|g' -e 's| \\([[a-zA-Z]]\\):| /\\1|g' -e 's|^ ||'`
+      ;;
+    cygwin*)
+      # Convert to unix form, then to dos form, then back to unix form
+      # but this time dos style (no spaces!) so that the unix form looks
+      # like /cygdrive/c/PROGRA~1:/cygdr...
+      sys_lib_search_path_spec=`cygpath --path --unix "$LIB"`
+      sys_lib_search_path_spec=`cygpath --path --dos "$sys_lib_search_path_spec" 2>/dev/null`
+      sys_lib_search_path_spec=`cygpath --path --unix "$sys_lib_search_path_spec" | $SED -e "s/$PATH_SEPARATOR/ /g"`
+      ;;
+    *)
+      sys_lib_search_path_spec=$LIB
+      if $ECHO "$sys_lib_search_path_spec" | [$GREP ';[c-zC-Z]:/' >/dev/null]; then
+        # It is most probably a Windows format PATH.
+        sys_lib_search_path_spec=`$ECHO "$sys_lib_search_path_spec" | $SED -e 's/;/ /g'`
+      else
+        sys_lib_search_path_spec=`$ECHO "$sys_lib_search_path_spec" | $SED -e "s/$PATH_SEPARATOR/ /g"`
+      fi
+      # FIXME: find the short name or the path components, as spaces are
+      # common. (e.g. "Program Files" -> "PROGRA~1")
+      ;;
+    esac
+
+    # DLL is installed to $(libdir)/../bin by postinstall_cmds
+    postinstall_cmds='base_file=`basename \$file`~
+      dlpath=`$SHELL 2>&1 -c '\''. $dir/'\''\$base_file'\''i; echo \$dlname'\''`~
+      dldir=$destdir/`dirname \$dlpath`~
+      test -d \$dldir || mkdir -p \$dldir~
+      $install_prog $dir/$dlname \$dldir/$dlname'
+    postuninstall_cmds='dldll=`$SHELL 2>&1 -c '\''. $file; echo \$dlname'\''`~
+      dlpath=$dir/\$dldll~
+       $RM \$dlpath'
+    shlibpath_overrides_runpath=yes
+    dynamic_linker='Win32 link.exe'
+    ;;
+
+  *)
+    # Assume MSVC wrapper
+    library_names_spec='$libname`echo $release | $SED -e 's/[[.]]/-/g'`$versuffix$shared_ext $libname.lib'
+    dynamic_linker='Win32 ld.exe'
+    ;;
+  esac
+  # FIXME: first we should search . and the directory the executable is in
+  shlibpath_var=PATH
+  ;;
+
+darwin* | rhapsody*)
+  dynamic_linker="$host_os dyld"
+  version_type=darwin
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='$libname$release$major$shared_ext $libname$shared_ext'
+  soname_spec='$libname$release$major$shared_ext'
+  shlibpath_overrides_runpath=yes
+  shlibpath_var=DYLD_LIBRARY_PATH
+  shrext_cmds='`test .$module = .yes && echo .so || echo .dylib`'
+m4_if([$1], [],[
+  sys_lib_search_path_spec="$sys_lib_search_path_spec /usr/local/lib"])
+  sys_lib_dlsearch_path_spec='/usr/local/lib /lib /usr/lib'
+  ;;
+
+dgux*)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  soname_spec='$libname$release$shared_ext$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  ;;
+
+freebsd* | dragonfly*)
+  # DragonFly does not have aout.  When/if they implement a new
+  # versioning mechanism, adjust this.
+  if test -x /usr/bin/objformat; then
+    objformat=`/usr/bin/objformat`
+  else
+    case $host_os in
+    freebsd[[23]].*) objformat=aout ;;
+    *) objformat=elf ;;
+    esac
+  fi
+  version_type=freebsd-$objformat
+  case $version_type in
+    freebsd-elf*)
+      library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+      soname_spec='$libname$release$shared_ext$major'
+      need_version=no
+      need_lib_prefix=no
+      ;;
+    freebsd-*)
+      library_names_spec='$libname$release$shared_ext$versuffix $libname$shared_ext$versuffix'
+      need_version=yes
+      ;;
+  esac
+  shlibpath_var=LD_LIBRARY_PATH
+  case $host_os in
+  freebsd2.*)
+    shlibpath_overrides_runpath=yes
+    ;;
+  freebsd3.[[01]]* | freebsdelf3.[[01]]*)
+    shlibpath_overrides_runpath=yes
+    hardcode_into_libs=yes
+    ;;
+  freebsd3.[[2-9]]* | freebsdelf3.[[2-9]]* | \
+  freebsd4.[[0-5]] | freebsdelf4.[[0-5]] | freebsd4.1.1 | freebsdelf4.1.1)
+    shlibpath_overrides_runpath=no
+    hardcode_into_libs=yes
+    ;;
+  *) # from 4.6 on, and DragonFly
+    shlibpath_overrides_runpath=yes
+    hardcode_into_libs=yes
+    ;;
+  esac
+  ;;
+
+haiku*)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  need_lib_prefix=no
+  need_version=no
+  dynamic_linker="$host_os runtime_loader"
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  soname_spec='$libname$release$shared_ext$major'
+  shlibpath_var=LIBRARY_PATH
+  shlibpath_overrides_runpath=no
+  sys_lib_dlsearch_path_spec='/boot/home/config/lib /boot/common/lib /boot/system/lib'
+  hardcode_into_libs=yes
+  ;;
+
+hpux9* | hpux10* | hpux11*)
+  # Give a soname corresponding to the major version so that dld.sl refuses to
+  # link against other versions.
+  version_type=sunos
+  need_lib_prefix=no
+  need_version=no
+  case $host_cpu in
+  ia64*)
+    shrext_cmds='.so'
+    hardcode_into_libs=yes
+    dynamic_linker="$host_os dld.so"
+    shlibpath_var=LD_LIBRARY_PATH
+    shlibpath_overrides_runpath=yes # Unless +noenvvar is specified.
+    library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+    soname_spec='$libname$release$shared_ext$major'
+    if test 32 = "$HPUX_IA64_MODE"; then
+      sys_lib_search_path_spec="/usr/lib/hpux32 /usr/local/lib/hpux32 /usr/local/lib"
+      sys_lib_dlsearch_path_spec=/usr/lib/hpux32
+    else
+      sys_lib_search_path_spec="/usr/lib/hpux64 /usr/local/lib/hpux64"
+      sys_lib_dlsearch_path_spec=/usr/lib/hpux64
+    fi
+    ;;
+  hppa*64*)
+    shrext_cmds='.sl'
+    hardcode_into_libs=yes
+    dynamic_linker="$host_os dld.sl"
+    shlibpath_var=LD_LIBRARY_PATH # How should we handle SHLIB_PATH
+    shlibpath_overrides_runpath=yes # Unless +noenvvar is specified.
+    library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+    soname_spec='$libname$release$shared_ext$major'
+    sys_lib_search_path_spec="/usr/lib/pa20_64 /usr/ccs/lib/pa20_64"
+    sys_lib_dlsearch_path_spec=$sys_lib_search_path_spec
+    ;;
+  *)
+    shrext_cmds='.sl'
+    dynamic_linker="$host_os dld.sl"
+    shlibpath_var=SHLIB_PATH
+    shlibpath_overrides_runpath=no # +s is required to enable SHLIB_PATH
+    library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+    soname_spec='$libname$release$shared_ext$major'
+    ;;
+  esac
+  # HP-UX runs *really* slowly unless shared libraries are mode 555, ...
+  postinstall_cmds='chmod 555 $lib'
+  # or fails outright, so override atomically:
+  install_override_mode=555
+  ;;
+
+interix[[3-9]]*)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  soname_spec='$libname$release$shared_ext$major'
+  dynamic_linker='Interix 3.x ld.so.1 (PE, like ELF)'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=no
+  hardcode_into_libs=yes
+  ;;
+
+irix5* | irix6* | nonstopux*)
+  case $host_os in
+    nonstopux*) version_type=nonstopux ;;
+    *)
+	if test yes = "$lt_cv_prog_gnu_ld"; then
+		version_type=linux # correct to gnu/linux during the next big refactor
+	else
+		version_type=irix
+	fi ;;
+  esac
+  need_lib_prefix=no
+  need_version=no
+  soname_spec='$libname$release$shared_ext$major'
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$release$shared_ext $libname$shared_ext'
+  case $host_os in
+  irix5* | nonstopux*)
+    libsuff= shlibsuff=
+    ;;
+  *)
+    case $LD in # libtool.m4 will add one of these switches to LD
+    *-32|*"-32 "|*-melf32bsmip|*"-melf32bsmip ")
+      libsuff= shlibsuff= libmagic=32-bit;;
+    *-n32|*"-n32 "|*-melf32bmipn32|*"-melf32bmipn32 ")
+      libsuff=32 shlibsuff=N32 libmagic=N32;;
+    *-64|*"-64 "|*-melf64bmip|*"-melf64bmip ")
+      libsuff=64 shlibsuff=64 libmagic=64-bit;;
+    *) libsuff= shlibsuff= libmagic=never-match;;
+    esac
+    ;;
+  esac
+  shlibpath_var=LD_LIBRARY${shlibsuff}_PATH
+  shlibpath_overrides_runpath=no
+  sys_lib_search_path_spec="/usr/lib$libsuff /lib$libsuff /usr/local/lib$libsuff"
+  sys_lib_dlsearch_path_spec="/usr/lib$libsuff /lib$libsuff"
+  hardcode_into_libs=yes
+  ;;
+
+# No shared lib support for Linux oldld, aout, or coff.
+linux*oldld* | linux*aout* | linux*coff*)
+  dynamic_linker=no
+  ;;
+
+linux*android*)
+  version_type=none # Android doesn't support versioned libraries.
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='$libname$release$shared_ext'
+  soname_spec='$libname$release$shared_ext'
+  finish_cmds=
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+
+  # This implies no fast_install, which is unacceptable.
+  # Some rework will be needed to allow for fast_install
+  # before this can be enabled.
+  hardcode_into_libs=yes
+
+  dynamic_linker='Android linker'
+  # Don't embed -rpath directories since the linker doesn't support them.
+  _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir'
+  ;;
+
+# This must be glibc/ELF.
+linux* | k*bsd*-gnu | kopensolaris*-gnu | gnu*)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  soname_spec='$libname$release$shared_ext$major'
+  finish_cmds='PATH="\$PATH:/sbin" ldconfig -n $libdir'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=no
+
+  # Some binutils ld are patched to set DT_RUNPATH
+  AC_CACHE_VAL([lt_cv_shlibpath_overrides_runpath],
+    [lt_cv_shlibpath_overrides_runpath=no
+    save_LDFLAGS=$LDFLAGS
+    save_libdir=$libdir
+    eval "libdir=/foo; wl=\"$_LT_TAGVAR(lt_prog_compiler_wl, $1)\"; \
+	 LDFLAGS=\"\$LDFLAGS $_LT_TAGVAR(hardcode_libdir_flag_spec, $1)\""
+    AC_LINK_IFELSE([AC_LANG_PROGRAM([],[])],
+      [AS_IF([ ($OBJDUMP -p conftest$ac_exeext) 2>/dev/null | grep "RUNPATH.*$libdir" >/dev/null],
+	 [lt_cv_shlibpath_overrides_runpath=yes])])
+    LDFLAGS=$save_LDFLAGS
+    libdir=$save_libdir
+    ])
+  shlibpath_overrides_runpath=$lt_cv_shlibpath_overrides_runpath
+
+  # This implies no fast_install, which is unacceptable.
+  # Some rework will be needed to allow for fast_install
+  # before this can be enabled.
+  hardcode_into_libs=yes
+
+  # Ideally, we could use ldconfig to report *all* directores which are
+  # searched for libraries, however this is still not possible.  Aside from not
+  # being certain /sbin/ldconfig is available, command
+  # 'ldconfig -N -X -v | grep ^/' on 64bit Fedora does not report /usr/lib64,
+  # even though it is searched at run-time.  Try to do the best guess by
+  # appending ld.so.conf contents (and includes) to the search path.
+  if test -f /etc/ld.so.conf; then
+    lt_ld_extra=`awk '/^include / { system(sprintf("cd /etc; cat %s 2>/dev/null", \[$]2)); skip = 1; } { if (!skip) print \[$]0; skip = 0; }' < /etc/ld.so.conf | $SED -e 's/#.*//;/^[	 ]*hwcap[	 ]/d;s/[:,	]/ /g;s/=[^=]*$//;s/=[^= ]* / /g;s/"//g;/^$/d' | tr '\n' ' '`
+    sys_lib_dlsearch_path_spec="/lib /usr/lib $lt_ld_extra"
+  fi
+
+  # We used to test for /lib/ld.so.1 and disable shared libraries on
+  # powerpc, because MkLinux only supported shared libraries with the
+  # GNU dynamic linker.  Since this was broken with cross compilers,
+  # most powerpc-linux boxes support dynamic linking these days and
+  # people can always --disable-shared, the test was removed, and we
+  # assume the GNU/Linux dynamic linker is in use.
+  dynamic_linker='GNU/Linux ld.so'
+  ;;
+
+netbsdelf*-gnu)
+  version_type=linux
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major ${libname}${shared_ext}'
+  soname_spec='${libname}${release}${shared_ext}$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=no
+  hardcode_into_libs=yes
+  dynamic_linker='NetBSD ld.elf_so'
+  ;;
+
+netbsd*)
+  version_type=sunos
+  need_lib_prefix=no
+  need_version=no
+  if echo __ELF__ | $CC -E - | $GREP __ELF__ >/dev/null; then
+    library_names_spec='$libname$release$shared_ext$versuffix $libname$shared_ext$versuffix'
+    finish_cmds='PATH="\$PATH:/sbin" ldconfig -m $libdir'
+    dynamic_linker='NetBSD (a.out) ld.so'
+  else
+    library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+    soname_spec='$libname$release$shared_ext$major'
+    dynamic_linker='NetBSD ld.elf_so'
+  fi
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  hardcode_into_libs=yes
+  ;;
+
+newsos6)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  ;;
+
+*nto* | *qnx*)
+  version_type=qnx
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  soname_spec='$libname$release$shared_ext$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=no
+  hardcode_into_libs=yes
+  dynamic_linker='ldqnx.so'
+  ;;
+
+openbsd* | bitrig*)
+  version_type=sunos
+  sys_lib_dlsearch_path_spec=/usr/lib
+  need_lib_prefix=no
+  if test -z "`echo __ELF__ | $CC -E - | $GREP __ELF__`"; then
+    need_version=no
+  else
+    need_version=yes
+  fi
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$shared_ext$versuffix'
+  finish_cmds='PATH="\$PATH:/sbin" ldconfig -m $libdir'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  ;;
+
+os2*)
+  libname_spec='$name'
+  version_type=windows
+  shrext_cmds=.dll
+  need_version=no
+  need_lib_prefix=no
+  # OS/2 can only load a DLL with a base name of 8 characters or less.
+  soname_spec='`test -n "$os2dllname" && libname="$os2dllname";
+    v=$($ECHO $release$versuffix | tr -d .-);
+    n=$($ECHO $libname | cut -b -$((8 - ${#v})) | tr . _);
+    $ECHO $n$v`$shared_ext'
+  library_names_spec='${libname}_dll.$libext'
+  dynamic_linker='OS/2 ld.exe'
+  shlibpath_var=BEGINLIBPATH
+  sys_lib_search_path_spec="/lib /usr/lib /usr/local/lib"
+  sys_lib_dlsearch_path_spec=$sys_lib_search_path_spec
+  postinstall_cmds='base_file=`basename \$file`~
+    dlpath=`$SHELL 2>&1 -c '\''. $dir/'\''\$base_file'\''i; $ECHO \$dlname'\''`~
+    dldir=$destdir/`dirname \$dlpath`~
+    test -d \$dldir || mkdir -p \$dldir~
+    $install_prog $dir/$dlname \$dldir/$dlname~
+    chmod a+x \$dldir/$dlname~
+    if test -n '\''$stripme'\'' && test -n '\''$striplib'\''; then
+      eval '\''$striplib \$dldir/$dlname'\'' || exit \$?;
+    fi'
+  postuninstall_cmds='dldll=`$SHELL 2>&1 -c '\''. $file; $ECHO \$dlname'\''`~
+    dlpath=$dir/\$dldll~
+    $RM \$dlpath'
+  ;;
+
+osf3* | osf4* | osf5*)
+  version_type=osf
+  need_lib_prefix=no
+  need_version=no
+  soname_spec='$libname$release$shared_ext$major'
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  shlibpath_var=LD_LIBRARY_PATH
+  sys_lib_search_path_spec="/usr/shlib /usr/ccs/lib /usr/lib/cmplrs/cc /usr/lib /usr/local/lib /var/shlib"
+  sys_lib_dlsearch_path_spec=$sys_lib_search_path_spec
+  ;;
+
+rdos*)
+  dynamic_linker=no
+  ;;
+
+solaris*)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  soname_spec='$libname$release$shared_ext$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  hardcode_into_libs=yes
+  # ldd complains unless libraries are executable
+  postinstall_cmds='chmod +x $lib'
+  ;;
+
+sunos4*)
+  version_type=sunos
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$shared_ext$versuffix'
+  finish_cmds='PATH="\$PATH:/usr/etc" ldconfig $libdir'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  if test yes = "$with_gnu_ld"; then
+    need_lib_prefix=no
+  fi
+  need_version=yes
+  ;;
+
+sysv4 | sysv4.3*)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  soname_spec='$libname$release$shared_ext$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  case $host_vendor in
+    sni)
+      shlibpath_overrides_runpath=no
+      need_lib_prefix=no
+      runpath_var=LD_RUN_PATH
+      ;;
+    siemens)
+      need_lib_prefix=no
+      ;;
+    motorola)
+      need_lib_prefix=no
+      need_version=no
+      shlibpath_overrides_runpath=no
+      sys_lib_search_path_spec='/lib /usr/lib /usr/ccs/lib'
+      ;;
+  esac
+  ;;
+
+sysv4*MP*)
+  if test -d /usr/nec; then
+    version_type=linux # correct to gnu/linux during the next big refactor
+    library_names_spec='$libname$shared_ext.$versuffix $libname$shared_ext.$major $libname$shared_ext'
+    soname_spec='$libname$shared_ext.$major'
+    shlibpath_var=LD_LIBRARY_PATH
+  fi
+  ;;
+
+sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX* | sysv4*uw2*)
+  version_type=sco
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext $libname$shared_ext'
+  soname_spec='$libname$release$shared_ext$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  hardcode_into_libs=yes
+  if test yes = "$with_gnu_ld"; then
+    sys_lib_search_path_spec='/usr/local/lib /usr/gnu/lib /usr/ccs/lib /usr/lib /lib'
+  else
+    sys_lib_search_path_spec='/usr/ccs/lib /usr/lib'
+    case $host_os in
+      sco3.2v5*)
+        sys_lib_search_path_spec="$sys_lib_search_path_spec /lib"
+	;;
+    esac
+  fi
+  sys_lib_dlsearch_path_spec='/usr/lib'
+  ;;
+
+tpf*)
+  # TPF is a cross-target only.  Preferred cross-host = GNU/Linux.
+  version_type=linux # correct to gnu/linux during the next big refactor
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=no
+  hardcode_into_libs=yes
+  ;;
+
+uts4*)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  soname_spec='$libname$release$shared_ext$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  ;;
+
+*)
+  dynamic_linker=no
+  ;;
+esac
+AC_MSG_RESULT([$dynamic_linker])
+test no = "$dynamic_linker" && can_build_shared=no
+
+variables_saved_for_relink="PATH $shlibpath_var $runpath_var"
+if test yes = "$GCC"; then
+  variables_saved_for_relink="$variables_saved_for_relink GCC_EXEC_PREFIX COMPILER_PATH LIBRARY_PATH"
+fi
+
+if test set = "${lt_cv_sys_lib_search_path_spec+set}"; then
+  sys_lib_search_path_spec=$lt_cv_sys_lib_search_path_spec
+fi
+
+if test set = "${lt_cv_sys_lib_dlsearch_path_spec+set}"; then
+  sys_lib_dlsearch_path_spec=$lt_cv_sys_lib_dlsearch_path_spec
+fi
+
+# remember unaugmented sys_lib_dlsearch_path content for libtool script decls...
+configure_time_dlsearch_path=$sys_lib_dlsearch_path_spec
+
+# ... but it needs LT_SYS_LIBRARY_PATH munging for other configure-time code
+func_munge_path_list sys_lib_dlsearch_path_spec "$LT_SYS_LIBRARY_PATH"
+
+# to be used as default LT_SYS_LIBRARY_PATH value in generated libtool
+configure_time_lt_sys_library_path=$LT_SYS_LIBRARY_PATH
+
+_LT_DECL([], [variables_saved_for_relink], [1],
+    [Variables whose values should be saved in libtool wrapper scripts and
+    restored at link time])
+_LT_DECL([], [need_lib_prefix], [0],
+    [Do we need the "lib" prefix for modules?])
+_LT_DECL([], [need_version], [0], [Do we need a version for libraries?])
+_LT_DECL([], [version_type], [0], [Library versioning type])
+_LT_DECL([], [runpath_var], [0],  [Shared library runtime path variable])
+_LT_DECL([], [shlibpath_var], [0],[Shared library path variable])
+_LT_DECL([], [shlibpath_overrides_runpath], [0],
+    [Is shlibpath searched before the hard-coded library search path?])
+_LT_DECL([], [libname_spec], [1], [Format of library name prefix])
+_LT_DECL([], [library_names_spec], [1],
+    [[List of archive names.  First name is the real one, the rest are links.
+    The last name is the one that the linker finds with -lNAME]])
+_LT_DECL([], [soname_spec], [1],
+    [[The coded name of the library, if different from the real name]])
+_LT_DECL([], [install_override_mode], [1],
+    [Permission mode override for installation of shared libraries])
+_LT_DECL([], [postinstall_cmds], [2],
+    [Command to use after installation of a shared archive])
+_LT_DECL([], [postuninstall_cmds], [2],
+    [Command to use after uninstallation of a shared archive])
+_LT_DECL([], [finish_cmds], [2],
+    [Commands used to finish a libtool library installation in a directory])
+_LT_DECL([], [finish_eval], [1],
+    [[As "finish_cmds", except a single script fragment to be evaled but
+    not shown]])
+_LT_DECL([], [hardcode_into_libs], [0],
+    [Whether we should hardcode library paths into libraries])
+_LT_DECL([], [sys_lib_search_path_spec], [2],
+    [Compile-time system search path for libraries])
+_LT_DECL([sys_lib_dlsearch_path_spec], [configure_time_dlsearch_path], [2],
+    [Detected run-time system search path for libraries])
+_LT_DECL([], [configure_time_lt_sys_library_path], [2],
+    [Explicit LT_SYS_LIBRARY_PATH set during ./configure time])
+])# _LT_SYS_DYNAMIC_LINKER
+
+
+# _LT_PATH_TOOL_PREFIX(TOOL)
+# --------------------------
+# find a file program that can recognize shared library
+AC_DEFUN([_LT_PATH_TOOL_PREFIX],
+[m4_require([_LT_DECL_EGREP])dnl
+AC_MSG_CHECKING([for $1])
+AC_CACHE_VAL(lt_cv_path_MAGIC_CMD,
+[case $MAGIC_CMD in
+[[\\/*] |  ?:[\\/]*])
+  lt_cv_path_MAGIC_CMD=$MAGIC_CMD # Let the user override the test with a path.
+  ;;
+*)
+  lt_save_MAGIC_CMD=$MAGIC_CMD
+  lt_save_ifs=$IFS; IFS=$PATH_SEPARATOR
+dnl $ac_dummy forces splitting on constant user-supplied paths.
+dnl POSIX.2 word splitting is done only on the output of word expansions,
+dnl not every word.  This closes a longstanding sh security hole.
+  ac_dummy="m4_if([$2], , $PATH, [$2])"
+  for ac_dir in $ac_dummy; do
+    IFS=$lt_save_ifs
+    test -z "$ac_dir" && ac_dir=.
+    if test -f "$ac_dir/$1"; then
+      lt_cv_path_MAGIC_CMD=$ac_dir/"$1"
+      if test -n "$file_magic_test_file"; then
+	case $deplibs_check_method in
+	"file_magic "*)
+	  file_magic_regex=`expr "$deplibs_check_method" : "file_magic \(.*\)"`
+	  MAGIC_CMD=$lt_cv_path_MAGIC_CMD
+	  if eval $file_magic_cmd \$file_magic_test_file 2> /dev/null |
+	    $EGREP "$file_magic_regex" > /dev/null; then
+	    :
+	  else
+	    cat <<_LT_EOF 1>&2
+
+*** Warning: the command libtool uses to detect shared libraries,
+*** $file_magic_cmd, produces output that libtool cannot recognize.
+*** The result is that libtool may fail to recognize shared libraries
+*** as such.  This will affect the creation of libtool libraries that
+*** depend on shared libraries, but programs linked with such libtool
+*** libraries will work regardless of this problem.  Nevertheless, you
+*** may want to report the problem to your system manager and/or to
+*** bug-libtool@gnu.org
+
+_LT_EOF
+	  fi ;;
+	esac
+      fi
+      break
+    fi
+  done
+  IFS=$lt_save_ifs
+  MAGIC_CMD=$lt_save_MAGIC_CMD
+  ;;
+esac])
+MAGIC_CMD=$lt_cv_path_MAGIC_CMD
+if test -n "$MAGIC_CMD"; then
+  AC_MSG_RESULT($MAGIC_CMD)
+else
+  AC_MSG_RESULT(no)
+fi
+_LT_DECL([], [MAGIC_CMD], [0],
+	 [Used to examine libraries when file_magic_cmd begins with "file"])dnl
+])# _LT_PATH_TOOL_PREFIX
+
+# Old name:
+AU_ALIAS([AC_PATH_TOOL_PREFIX], [_LT_PATH_TOOL_PREFIX])
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([AC_PATH_TOOL_PREFIX], [])
+
+
+# _LT_PATH_MAGIC
+# --------------
+# find a file program that can recognize a shared library
+m4_defun([_LT_PATH_MAGIC],
+[_LT_PATH_TOOL_PREFIX(${ac_tool_prefix}file, /usr/bin$PATH_SEPARATOR$PATH)
+if test -z "$lt_cv_path_MAGIC_CMD"; then
+  if test -n "$ac_tool_prefix"; then
+    _LT_PATH_TOOL_PREFIX(file, /usr/bin$PATH_SEPARATOR$PATH)
+  else
+    MAGIC_CMD=:
+  fi
+fi
+])# _LT_PATH_MAGIC
+
+
+# LT_PATH_LD
+# ----------
+# find the pathname to the GNU or non-GNU linker
+AC_DEFUN([LT_PATH_LD],
+[AC_REQUIRE([AC_PROG_CC])dnl
+AC_REQUIRE([AC_CANONICAL_HOST])dnl
+AC_REQUIRE([AC_CANONICAL_BUILD])dnl
+m4_require([_LT_DECL_SED])dnl
+m4_require([_LT_DECL_EGREP])dnl
+m4_require([_LT_PROG_ECHO_BACKSLASH])dnl
+
+AC_ARG_WITH([gnu-ld],
+    [AS_HELP_STRING([--with-gnu-ld],
+	[assume the C compiler uses GNU ld @<:@default=no@:>@])],
+    [test no = "$withval" || with_gnu_ld=yes],
+    [with_gnu_ld=no])dnl
+
+ac_prog=ld
+if test yes = "$GCC"; then
+  # Check if gcc -print-prog-name=ld gives a path.
+  AC_MSG_CHECKING([for ld used by $CC])
+  case $host in
+  *-*-mingw*)
+    # gcc leaves a trailing carriage return, which upsets mingw
+    ac_prog=`($CC -print-prog-name=ld) 2>&5 | tr -d '\015'` ;;
+  *)
+    ac_prog=`($CC -print-prog-name=ld) 2>&5` ;;
+  esac
+  case $ac_prog in
+    # Accept absolute paths.
+    [[\\/]]* | ?:[[\\/]]*)
+      re_direlt='/[[^/]][[^/]]*/\.\./'
+      # Canonicalize the pathname of ld
+      ac_prog=`$ECHO "$ac_prog"| $SED 's%\\\\%/%g'`
+      while $ECHO "$ac_prog" | $GREP "$re_direlt" > /dev/null 2>&1; do
+	ac_prog=`$ECHO $ac_prog| $SED "s%$re_direlt%/%"`
+      done
+      test -z "$LD" && LD=$ac_prog
+      ;;
+  "")
+    # If it fails, then pretend we aren't using GCC.
+    ac_prog=ld
+    ;;
+  *)
+    # If it is relative, then search for the first ld in PATH.
+    with_gnu_ld=unknown
+    ;;
+  esac
+elif test yes = "$with_gnu_ld"; then
+  AC_MSG_CHECKING([for GNU ld])
+else
+  AC_MSG_CHECKING([for non-GNU ld])
+fi
+AC_CACHE_VAL(lt_cv_path_LD,
+[if test -z "$LD"; then
+  lt_save_ifs=$IFS; IFS=$PATH_SEPARATOR
+  for ac_dir in $PATH; do
+    IFS=$lt_save_ifs
+    test -z "$ac_dir" && ac_dir=.
+    if test -f "$ac_dir/$ac_prog" || test -f "$ac_dir/$ac_prog$ac_exeext"; then
+      lt_cv_path_LD=$ac_dir/$ac_prog
+      # Check to see if the program is GNU ld.  I'd rather use --version,
+      # but apparently some variants of GNU ld only accept -v.
+      # Break only if it was the GNU/non-GNU ld that we prefer.
+      case `"$lt_cv_path_LD" -v 2>&1 </dev/null` in
+      *GNU* | *'with BFD'*)
+	test no != "$with_gnu_ld" && break
+	;;
+      *)
+	test yes != "$with_gnu_ld" && break
+	;;
+      esac
+    fi
+  done
+  IFS=$lt_save_ifs
+else
+  lt_cv_path_LD=$LD # Let the user override the test with a path.
+fi])
+LD=$lt_cv_path_LD
+if test -n "$LD"; then
+  AC_MSG_RESULT($LD)
+else
+  AC_MSG_RESULT(no)
+fi
+test -z "$LD" && AC_MSG_ERROR([no acceptable ld found in \$PATH])
+_LT_PATH_LD_GNU
+AC_SUBST([LD])
+
+_LT_TAGDECL([], [LD], [1], [The linker used to build libraries])
+])# LT_PATH_LD
+
+# Old names:
+AU_ALIAS([AM_PROG_LD], [LT_PATH_LD])
+AU_ALIAS([AC_PROG_LD], [LT_PATH_LD])
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([AM_PROG_LD], [])
+dnl AC_DEFUN([AC_PROG_LD], [])
+
+
+# _LT_PATH_LD_GNU
+#- --------------
+m4_defun([_LT_PATH_LD_GNU],
+[AC_CACHE_CHECK([if the linker ($LD) is GNU ld], lt_cv_prog_gnu_ld,
+[# I'd rather use --version here, but apparently some GNU lds only accept -v.
+case `$LD -v 2>&1 </dev/null` in
+*GNU* | *'with BFD'*)
+  lt_cv_prog_gnu_ld=yes
+  ;;
+*)
+  lt_cv_prog_gnu_ld=no
+  ;;
+esac])
+with_gnu_ld=$lt_cv_prog_gnu_ld
+])# _LT_PATH_LD_GNU
+
+
+# _LT_CMD_RELOAD
+# --------------
+# find reload flag for linker
+#   -- PORTME Some linkers may need a different reload flag.
+m4_defun([_LT_CMD_RELOAD],
+[AC_CACHE_CHECK([for $LD option to reload object files],
+  lt_cv_ld_reload_flag,
+  [lt_cv_ld_reload_flag='-r'])
+reload_flag=$lt_cv_ld_reload_flag
+case $reload_flag in
+"" | " "*) ;;
+*) reload_flag=" $reload_flag" ;;
+esac
+reload_cmds='$LD$reload_flag -o $output$reload_objs'
+case $host_os in
+  cygwin* | mingw* | pw32* | cegcc*)
+    if test yes != "$GCC"; then
+      reload_cmds=false
+    fi
+    ;;
+  darwin*)
+    if test yes = "$GCC"; then
+      reload_cmds='$LTCC $LTCFLAGS -nostdlib $wl-r -o $output$reload_objs'
+    else
+      reload_cmds='$LD$reload_flag -o $output$reload_objs'
+    fi
+    ;;
+esac
+_LT_TAGDECL([], [reload_flag], [1], [How to create reloadable object files])dnl
+_LT_TAGDECL([], [reload_cmds], [2])dnl
+])# _LT_CMD_RELOAD
+
+
+# _LT_PATH_DD
+# -----------
+# find a working dd
+m4_defun([_LT_PATH_DD],
+[AC_CACHE_CHECK([for a working dd], [ac_cv_path_lt_DD],
+[printf 0123456789abcdef0123456789abcdef >conftest.i
+cat conftest.i conftest.i >conftest2.i
+: ${lt_DD:=$DD}
+AC_PATH_PROGS_FEATURE_CHECK([lt_DD], [dd],
+[if "$ac_path_lt_DD" bs=32 count=1 <conftest2.i >conftest.out 2>/dev/null; then
+  cmp -s conftest.i conftest.out \
+  && ac_cv_path_lt_DD="$ac_path_lt_DD" ac_path_lt_DD_found=:
+fi])
+rm -f conftest.i conftest2.i conftest.out])
+])# _LT_PATH_DD
+
+
+# _LT_CMD_TRUNCATE
+# ----------------
+# find command to truncate a binary pipe
+m4_defun([_LT_CMD_TRUNCATE],
+[m4_require([_LT_PATH_DD])
+AC_CACHE_CHECK([how to truncate binary pipes], [lt_cv_truncate_bin],
+[printf 0123456789abcdef0123456789abcdef >conftest.i
+cat conftest.i conftest.i >conftest2.i
+lt_cv_truncate_bin=
+if "$ac_cv_path_lt_DD" bs=32 count=1 <conftest2.i >conftest.out 2>/dev/null; then
+  cmp -s conftest.i conftest.out \
+  && lt_cv_truncate_bin="$ac_cv_path_lt_DD bs=4096 count=1"
+fi
+rm -f conftest.i conftest2.i conftest.out
+test -z "$lt_cv_truncate_bin" && lt_cv_truncate_bin="$SED -e 4q"])
+_LT_DECL([lt_truncate_bin], [lt_cv_truncate_bin], [1],
+  [Command to truncate a binary pipe])
+])# _LT_CMD_TRUNCATE
+
+
+# _LT_CHECK_MAGIC_METHOD
+# ----------------------
+# how to check for library dependencies
+#  -- PORTME fill in with the dynamic library characteristics
+m4_defun([_LT_CHECK_MAGIC_METHOD],
+[m4_require([_LT_DECL_EGREP])
+m4_require([_LT_DECL_OBJDUMP])
+AC_CACHE_CHECK([how to recognize dependent libraries],
+lt_cv_deplibs_check_method,
+[lt_cv_file_magic_cmd='$MAGIC_CMD'
+lt_cv_file_magic_test_file=
+lt_cv_deplibs_check_method='unknown'
+# Need to set the preceding variable on all platforms that support
+# interlibrary dependencies.
+# 'none' -- dependencies not supported.
+# 'unknown' -- same as none, but documents that we really don't know.
+# 'pass_all' -- all dependencies passed with no checks.
+# 'test_compile' -- check by making test program.
+# 'file_magic [[regex]]' -- check by looking for files in library path
+# that responds to the $file_magic_cmd with a given extended regex.
+# If you have 'file' or equivalent on your system and you're not sure
+# whether 'pass_all' will *always* work, you probably want this one.
+
+case $host_os in
+aix[[4-9]]*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+beos*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+bsdi[[45]]*)
+  lt_cv_deplibs_check_method='file_magic ELF [[0-9]][[0-9]]*-bit [[ML]]SB (shared object|dynamic lib)'
+  lt_cv_file_magic_cmd='/usr/bin/file -L'
+  lt_cv_file_magic_test_file=/shlib/libc.so
+  ;;
+
+cygwin*)
+  # func_win32_libid is a shell function defined in ltmain.sh
+  lt_cv_deplibs_check_method='file_magic ^x86 archive import|^x86 DLL'
+  lt_cv_file_magic_cmd='func_win32_libid'
+  ;;
+
+mingw* | pw32*)
+  # Base MSYS/MinGW do not provide the 'file' command needed by
+  # func_win32_libid shell function, so use a weaker test based on 'objdump',
+  # unless we find 'file', for example because we are cross-compiling.
+  if ( file / ) >/dev/null 2>&1; then
+    lt_cv_deplibs_check_method='file_magic ^x86 archive import|^x86 DLL'
+    lt_cv_file_magic_cmd='func_win32_libid'
+  else
+    # Keep this pattern in sync with the one in func_win32_libid.
+    lt_cv_deplibs_check_method='file_magic file format (pei*-i386(.*architecture: i386)?|pe-arm-wince|pe-x86-64)'
+    lt_cv_file_magic_cmd='$OBJDUMP -f'
+  fi
+  ;;
+
+cegcc*)
+  # use the weaker test based on 'objdump'. See mingw*.
+  lt_cv_deplibs_check_method='file_magic file format pe-arm-.*little(.*architecture: arm)?'
+  lt_cv_file_magic_cmd='$OBJDUMP -f'
+  ;;
+
+darwin* | rhapsody*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+freebsd* | dragonfly*)
+  if echo __ELF__ | $CC -E - | $GREP __ELF__ > /dev/null; then
+    case $host_cpu in
+    i*86 )
+      # Not sure whether the presence of OpenBSD here was a mistake.
+      # Let's accept both of them until this is cleared up.
+      lt_cv_deplibs_check_method='file_magic (FreeBSD|OpenBSD|DragonFly)/i[[3-9]]86 (compact )?demand paged shared library'
+      lt_cv_file_magic_cmd=/usr/bin/file
+      lt_cv_file_magic_test_file=`echo /usr/lib/libc.so.*`
+      ;;
+    esac
+  else
+    lt_cv_deplibs_check_method=pass_all
+  fi
+  ;;
+
+haiku*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+hpux10.20* | hpux11*)
+  lt_cv_file_magic_cmd=/usr/bin/file
+  case $host_cpu in
+  ia64*)
+    lt_cv_deplibs_check_method='file_magic (s[[0-9]][[0-9]][[0-9]]|ELF-[[0-9]][[0-9]]) shared object file - IA64'
+    lt_cv_file_magic_test_file=/usr/lib/hpux32/libc.so
+    ;;
+  hppa*64*)
+    [lt_cv_deplibs_check_method='file_magic (s[0-9][0-9][0-9]|ELF[ -][0-9][0-9])(-bit)?( [LM]SB)? shared object( file)?[, -]* PA-RISC [0-9]\.[0-9]']
+    lt_cv_file_magic_test_file=/usr/lib/pa20_64/libc.sl
+    ;;
+  *)
+    lt_cv_deplibs_check_method='file_magic (s[[0-9]][[0-9]][[0-9]]|PA-RISC[[0-9]]\.[[0-9]]) shared library'
+    lt_cv_file_magic_test_file=/usr/lib/libc.sl
+    ;;
+  esac
+  ;;
+
+interix[[3-9]]*)
+  # PIC code is broken on Interix 3.x, that's why |\.a not |_pic\.a here
+  lt_cv_deplibs_check_method='match_pattern /lib[[^/]]+(\.so|\.a)$'
+  ;;
+
+irix5* | irix6* | nonstopux*)
+  case $LD in
+  *-32|*"-32 ") libmagic=32-bit;;
+  *-n32|*"-n32 ") libmagic=N32;;
+  *-64|*"-64 ") libmagic=64-bit;;
+  *) libmagic=never-match;;
+  esac
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+# This must be glibc/ELF.
+linux* | k*bsd*-gnu | kopensolaris*-gnu | gnu*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+netbsd* | netbsdelf*-gnu)
+  if echo __ELF__ | $CC -E - | $GREP __ELF__ > /dev/null; then
+    lt_cv_deplibs_check_method='match_pattern /lib[[^/]]+(\.so\.[[0-9]]+\.[[0-9]]+|_pic\.a)$'
+  else
+    lt_cv_deplibs_check_method='match_pattern /lib[[^/]]+(\.so|_pic\.a)$'
+  fi
+  ;;
+
+newos6*)
+  lt_cv_deplibs_check_method='file_magic ELF [[0-9]][[0-9]]*-bit [[ML]]SB (executable|dynamic lib)'
+  lt_cv_file_magic_cmd=/usr/bin/file
+  lt_cv_file_magic_test_file=/usr/lib/libnls.so
+  ;;
+
+*nto* | *qnx*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+openbsd* | bitrig*)
+  if test -z "`echo __ELF__ | $CC -E - | $GREP __ELF__`"; then
+    lt_cv_deplibs_check_method='match_pattern /lib[[^/]]+(\.so\.[[0-9]]+\.[[0-9]]+|\.so|_pic\.a)$'
+  else
+    lt_cv_deplibs_check_method='match_pattern /lib[[^/]]+(\.so\.[[0-9]]+\.[[0-9]]+|_pic\.a)$'
+  fi
+  ;;
+
+osf3* | osf4* | osf5*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+rdos*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+solaris*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX* | sysv4*uw2*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+sysv4 | sysv4.3*)
+  case $host_vendor in
+  motorola)
+    lt_cv_deplibs_check_method='file_magic ELF [[0-9]][[0-9]]*-bit [[ML]]SB (shared object|dynamic lib) M[[0-9]][[0-9]]* Version [[0-9]]'
+    lt_cv_file_magic_test_file=`echo /usr/lib/libc.so*`
+    ;;
+  ncr)
+    lt_cv_deplibs_check_method=pass_all
+    ;;
+  sequent)
+    lt_cv_file_magic_cmd='/bin/file'
+    lt_cv_deplibs_check_method='file_magic ELF [[0-9]][[0-9]]*-bit [[LM]]SB (shared object|dynamic lib )'
+    ;;
+  sni)
+    lt_cv_file_magic_cmd='/bin/file'
+    lt_cv_deplibs_check_method="file_magic ELF [[0-9]][[0-9]]*-bit [[LM]]SB dynamic lib"
+    lt_cv_file_magic_test_file=/lib/libc.so
+    ;;
+  siemens)
+    lt_cv_deplibs_check_method=pass_all
+    ;;
+  pc)
+    lt_cv_deplibs_check_method=pass_all
+    ;;
+  esac
+  ;;
+
+tpf*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+os2*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+esac
+])
+
+file_magic_glob=
+want_nocaseglob=no
+if test "$build" = "$host"; then
+  case $host_os in
+  mingw* | pw32*)
+    if ( shopt | grep nocaseglob ) >/dev/null 2>&1; then
+      want_nocaseglob=yes
+    else
+      file_magic_glob=`echo aAbBcCdDeEfFgGhHiIjJkKlLmMnNoOpPqQrRsStTuUvVwWxXyYzZ | $SED -e "s/\(..\)/s\/[[\1]]\/[[\1]]\/g;/g"`
+    fi
+    ;;
+  esac
+fi
+
+file_magic_cmd=$lt_cv_file_magic_cmd
+deplibs_check_method=$lt_cv_deplibs_check_method
+test -z "$deplibs_check_method" && deplibs_check_method=unknown
+
+_LT_DECL([], [deplibs_check_method], [1],
+    [Method to check whether dependent libraries are shared objects])
+_LT_DECL([], [file_magic_cmd], [1],
+    [Command to use when deplibs_check_method = "file_magic"])
+_LT_DECL([], [file_magic_glob], [1],
+    [How to find potential files when deplibs_check_method = "file_magic"])
+_LT_DECL([], [want_nocaseglob], [1],
+    [Find potential files using nocaseglob when deplibs_check_method = "file_magic"])
+])# _LT_CHECK_MAGIC_METHOD
+
+
+# LT_PATH_NM
+# ----------
+# find the pathname to a BSD- or MS-compatible name lister
+AC_DEFUN([LT_PATH_NM],
+[AC_REQUIRE([AC_PROG_CC])dnl
+AC_CACHE_CHECK([for BSD- or MS-compatible name lister (nm)], lt_cv_path_NM,
+[if test -n "$NM"; then
+  # Let the user override the test.
+  lt_cv_path_NM=$NM
+else
+  lt_nm_to_check=${ac_tool_prefix}nm
+  if test -n "$ac_tool_prefix" && test "$build" = "$host"; then
+    lt_nm_to_check="$lt_nm_to_check nm"
+  fi
+  for lt_tmp_nm in $lt_nm_to_check; do
+    lt_save_ifs=$IFS; IFS=$PATH_SEPARATOR
+    for ac_dir in $PATH /usr/ccs/bin/elf /usr/ccs/bin /usr/ucb /bin; do
+      IFS=$lt_save_ifs
+      test -z "$ac_dir" && ac_dir=.
+      tmp_nm=$ac_dir/$lt_tmp_nm
+      if test -f "$tmp_nm" || test -f "$tmp_nm$ac_exeext"; then
+	# Check to see if the nm accepts a BSD-compat flag.
+	# Adding the 'sed 1q' prevents false positives on HP-UX, which says:
+	#   nm: unknown option "B" ignored
+	# Tru64's nm complains that /dev/null is an invalid object file
+	# MSYS converts /dev/null to NUL, MinGW nm treats NUL as empty
+	case $build_os in
+	mingw*) lt_bad_file=conftest.nm/nofile ;;
+	*) lt_bad_file=/dev/null ;;
+	esac
+	case `"$tmp_nm" -B $lt_bad_file 2>&1 | sed '1q'` in
+	*$lt_bad_file* | *'Invalid file or object type'*)
+	  lt_cv_path_NM="$tmp_nm -B"
+	  break 2
+	  ;;
+	*)
+	  case `"$tmp_nm" -p /dev/null 2>&1 | sed '1q'` in
+	  */dev/null*)
+	    lt_cv_path_NM="$tmp_nm -p"
+	    break 2
+	    ;;
+	  *)
+	    lt_cv_path_NM=${lt_cv_path_NM="$tmp_nm"} # keep the first match, but
+	    continue # so that we can try to find one that supports BSD flags
+	    ;;
+	  esac
+	  ;;
+	esac
+      fi
+    done
+    IFS=$lt_save_ifs
+  done
+  : ${lt_cv_path_NM=no}
+fi])
+if test no != "$lt_cv_path_NM"; then
+  NM=$lt_cv_path_NM
+else
+  # Didn't find any BSD compatible name lister, look for dumpbin.
+  if test -n "$DUMPBIN"; then :
+    # Let the user override the test.
+  else
+    AC_CHECK_TOOLS(DUMPBIN, [dumpbin "link -dump"], :)
+    case `$DUMPBIN -symbols -headers /dev/null 2>&1 | sed '1q'` in
+    *COFF*)
+      DUMPBIN="$DUMPBIN -symbols -headers"
+      ;;
+    *)
+      DUMPBIN=:
+      ;;
+    esac
+  fi
+  AC_SUBST([DUMPBIN])
+  if test : != "$DUMPBIN"; then
+    NM=$DUMPBIN
+  fi
+fi
+test -z "$NM" && NM=nm
+AC_SUBST([NM])
+_LT_DECL([], [NM], [1], [A BSD- or MS-compatible name lister])dnl
+
+AC_CACHE_CHECK([the name lister ($NM) interface], [lt_cv_nm_interface],
+  [lt_cv_nm_interface="BSD nm"
+  echo "int some_variable = 0;" > conftest.$ac_ext
+  (eval echo "\"\$as_me:$LINENO: $ac_compile\"" >&AS_MESSAGE_LOG_FD)
+  (eval "$ac_compile" 2>conftest.err)
+  cat conftest.err >&AS_MESSAGE_LOG_FD
+  (eval echo "\"\$as_me:$LINENO: $NM \\\"conftest.$ac_objext\\\"\"" >&AS_MESSAGE_LOG_FD)
+  (eval "$NM \"conftest.$ac_objext\"" 2>conftest.err > conftest.out)
+  cat conftest.err >&AS_MESSAGE_LOG_FD
+  (eval echo "\"\$as_me:$LINENO: output\"" >&AS_MESSAGE_LOG_FD)
+  cat conftest.out >&AS_MESSAGE_LOG_FD
+  if $GREP 'External.*some_variable' conftest.out > /dev/null; then
+    lt_cv_nm_interface="MS dumpbin"
+  fi
+  rm -f conftest*])
+])# LT_PATH_NM
+
+# Old names:
+AU_ALIAS([AM_PROG_NM], [LT_PATH_NM])
+AU_ALIAS([AC_PROG_NM], [LT_PATH_NM])
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([AM_PROG_NM], [])
+dnl AC_DEFUN([AC_PROG_NM], [])
+
+# _LT_CHECK_SHAREDLIB_FROM_LINKLIB
+# --------------------------------
+# how to determine the name of the shared library
+# associated with a specific link library.
+#  -- PORTME fill in with the dynamic library characteristics
+m4_defun([_LT_CHECK_SHAREDLIB_FROM_LINKLIB],
+[m4_require([_LT_DECL_EGREP])
+m4_require([_LT_DECL_OBJDUMP])
+m4_require([_LT_DECL_DLLTOOL])
+AC_CACHE_CHECK([how to associate runtime and link libraries],
+lt_cv_sharedlib_from_linklib_cmd,
+[lt_cv_sharedlib_from_linklib_cmd='unknown'
+
+case $host_os in
+cygwin* | mingw* | pw32* | cegcc*)
+  # two different shell functions defined in ltmain.sh;
+  # decide which one to use based on capabilities of $DLLTOOL
+  case `$DLLTOOL --help 2>&1` in
+  *--identify-strict*)
+    lt_cv_sharedlib_from_linklib_cmd=func_cygming_dll_for_implib
+    ;;
+  *)
+    lt_cv_sharedlib_from_linklib_cmd=func_cygming_dll_for_implib_fallback
+    ;;
+  esac
+  ;;
+*)
+  # fallback: assume linklib IS sharedlib
+  lt_cv_sharedlib_from_linklib_cmd=$ECHO
+  ;;
+esac
+])
+sharedlib_from_linklib_cmd=$lt_cv_sharedlib_from_linklib_cmd
+test -z "$sharedlib_from_linklib_cmd" && sharedlib_from_linklib_cmd=$ECHO
+
+_LT_DECL([], [sharedlib_from_linklib_cmd], [1],
+    [Command to associate shared and link libraries])
+])# _LT_CHECK_SHAREDLIB_FROM_LINKLIB
+
+
+# _LT_PATH_MANIFEST_TOOL
+# ----------------------
+# locate the manifest tool
+m4_defun([_LT_PATH_MANIFEST_TOOL],
+[AC_CHECK_TOOL(MANIFEST_TOOL, mt, :)
+test -z "$MANIFEST_TOOL" && MANIFEST_TOOL=mt
+AC_CACHE_CHECK([if $MANIFEST_TOOL is a manifest tool], [lt_cv_path_mainfest_tool],
+  [lt_cv_path_mainfest_tool=no
+  echo "$as_me:$LINENO: $MANIFEST_TOOL '-?'" >&AS_MESSAGE_LOG_FD
+  $MANIFEST_TOOL '-?' 2>conftest.err > conftest.out
+  cat conftest.err >&AS_MESSAGE_LOG_FD
+  if $GREP 'Manifest Tool' conftest.out > /dev/null; then
+    lt_cv_path_mainfest_tool=yes
+  fi
+  rm -f conftest*])
+if test yes != "$lt_cv_path_mainfest_tool"; then
+  MANIFEST_TOOL=:
+fi
+_LT_DECL([], [MANIFEST_TOOL], [1], [Manifest tool])dnl
+])# _LT_PATH_MANIFEST_TOOL
+
+
+# _LT_DLL_DEF_P([FILE])
+# ---------------------
+# True iff FILE is a Windows DLL '.def' file.
+# Keep in sync with func_dll_def_p in the libtool script
+AC_DEFUN([_LT_DLL_DEF_P],
+[dnl
+  test DEF = "`$SED -n dnl
+    -e '\''s/^[[	 ]]*//'\'' dnl Strip leading whitespace
+    -e '\''/^\(;.*\)*$/d'\'' dnl      Delete empty lines and comments
+    -e '\''s/^\(EXPORTS\|LIBRARY\)\([[	 ]].*\)*$/DEF/p'\'' dnl
+    -e q dnl                          Only consider the first "real" line
+    $1`" dnl
+])# _LT_DLL_DEF_P
+
+
+# LT_LIB_M
+# --------
+# check for math library
+AC_DEFUN([LT_LIB_M],
+[AC_REQUIRE([AC_CANONICAL_HOST])dnl
+LIBM=
+case $host in
+*-*-beos* | *-*-cegcc* | *-*-cygwin* | *-*-haiku* | *-*-pw32* | *-*-darwin*)
+  # These system don't have libm, or don't need it
+  ;;
+*-ncr-sysv4.3*)
+  AC_CHECK_LIB(mw, _mwvalidcheckl, LIBM=-lmw)
+  AC_CHECK_LIB(m, cos, LIBM="$LIBM -lm")
+  ;;
+*)
+  AC_CHECK_LIB(m, cos, LIBM=-lm)
+  ;;
+esac
+AC_SUBST([LIBM])
+])# LT_LIB_M
+
+# Old name:
+AU_ALIAS([AC_CHECK_LIBM], [LT_LIB_M])
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([AC_CHECK_LIBM], [])
+
+
+# _LT_COMPILER_NO_RTTI([TAGNAME])
+# -------------------------------
+m4_defun([_LT_COMPILER_NO_RTTI],
+[m4_require([_LT_TAG_COMPILER])dnl
+
+_LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1)=
+
+if test yes = "$GCC"; then
+  case $cc_basename in
+  nvcc*)
+    _LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1)=' -Xcompiler -fno-builtin' ;;
+  *)
+    _LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1)=' -fno-builtin' ;;
+  esac
+
+  _LT_COMPILER_OPTION([if $compiler supports -fno-rtti -fno-exceptions],
+    lt_cv_prog_compiler_rtti_exceptions,
+    [-fno-rtti -fno-exceptions], [],
+    [_LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1)="$_LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1) -fno-rtti -fno-exceptions"])
+fi
+_LT_TAGDECL([no_builtin_flag], [lt_prog_compiler_no_builtin_flag], [1],
+	[Compiler flag to turn off builtin functions])
+])# _LT_COMPILER_NO_RTTI
+
+
+# _LT_CMD_GLOBAL_SYMBOLS
+# ----------------------
+m4_defun([_LT_CMD_GLOBAL_SYMBOLS],
+[AC_REQUIRE([AC_CANONICAL_HOST])dnl
+AC_REQUIRE([AC_PROG_CC])dnl
+AC_REQUIRE([AC_PROG_AWK])dnl
+AC_REQUIRE([LT_PATH_NM])dnl
+AC_REQUIRE([LT_PATH_LD])dnl
+m4_require([_LT_DECL_SED])dnl
+m4_require([_LT_DECL_EGREP])dnl
+m4_require([_LT_TAG_COMPILER])dnl
+
+# Check for command to grab the raw symbol name followed by C symbol from nm.
+AC_MSG_CHECKING([command to parse $NM output from $compiler object])
+AC_CACHE_VAL([lt_cv_sys_global_symbol_pipe],
+[
+# These are sane defaults that work on at least a few old systems.
+# [They come from Ultrix.  What could be older than Ultrix?!! ;)]
+
+# Character class describing NM global symbol codes.
+symcode='[[BCDEGRST]]'
+
+# Regexp to match symbols that can be accessed directly from C.
+sympat='\([[_A-Za-z]][[_A-Za-z0-9]]*\)'
+
+# Define system-specific variables.
+case $host_os in
+aix*)
+  symcode='[[BCDT]]'
+  ;;
+cygwin* | mingw* | pw32* | cegcc*)
+  symcode='[[ABCDGISTW]]'
+  ;;
+hpux*)
+  if test ia64 = "$host_cpu"; then
+    symcode='[[ABCDEGRST]]'
+  fi
+  ;;
+irix* | nonstopux*)
+  symcode='[[BCDEGRST]]'
+  ;;
+osf*)
+  symcode='[[BCDEGQRST]]'
+  ;;
+solaris*)
+  symcode='[[BDRT]]'
+  ;;
+sco3.2v5*)
+  symcode='[[DT]]'
+  ;;
+sysv4.2uw2*)
+  symcode='[[DT]]'
+  ;;
+sysv5* | sco5v6* | unixware* | OpenUNIX*)
+  symcode='[[ABDT]]'
+  ;;
+sysv4)
+  symcode='[[DFNSTU]]'
+  ;;
+esac
+
+# If we're using GNU nm, then use its standard symbol codes.
+case `$NM -V 2>&1` in
+*GNU* | *'with BFD'*)
+  symcode='[[ABCDGIRSTW]]' ;;
+esac
+
+if test "$lt_cv_nm_interface" = "MS dumpbin"; then
+  # Gets list of data symbols to import.
+  lt_cv_sys_global_symbol_to_import="sed -n -e 's/^I .* \(.*\)$/\1/p'"
+  # Adjust the below global symbol transforms to fixup imported variables.
+  lt_cdecl_hook=" -e 's/^I .* \(.*\)$/extern __declspec(dllimport) char \1;/p'"
+  lt_c_name_hook=" -e 's/^I .* \(.*\)$/  {\"\1\", (void *) 0},/p'"
+  lt_c_name_lib_hook="\
+  -e 's/^I .* \(lib.*\)$/  {\"\1\", (void *) 0},/p'\
+  -e 's/^I .* \(.*\)$/  {\"lib\1\", (void *) 0},/p'"
+else
+  # Disable hooks by default.
+  lt_cv_sys_global_symbol_to_import=
+  lt_cdecl_hook=
+  lt_c_name_hook=
+  lt_c_name_lib_hook=
+fi
+
+# Transform an extracted symbol line into a proper C declaration.
+# Some systems (esp. on ia64) link data and code symbols differently,
+# so use this general approach.
+lt_cv_sys_global_symbol_to_cdecl="sed -n"\
+$lt_cdecl_hook\
+" -e 's/^T .* \(.*\)$/extern int \1();/p'"\
+" -e 's/^$symcode$symcode* .* \(.*\)$/extern char \1;/p'"
+
+# Transform an extracted symbol line into symbol name and symbol address
+lt_cv_sys_global_symbol_to_c_name_address="sed -n"\
+$lt_c_name_hook\
+" -e 's/^: \(.*\) .*$/  {\"\1\", (void *) 0},/p'"\
+" -e 's/^$symcode$symcode* .* \(.*\)$/  {\"\1\", (void *) \&\1},/p'"
+
+# Transform an extracted symbol line into symbol name with lib prefix and
+# symbol address.
+lt_cv_sys_global_symbol_to_c_name_address_lib_prefix="sed -n"\
+$lt_c_name_lib_hook\
+" -e 's/^: \(.*\) .*$/  {\"\1\", (void *) 0},/p'"\
+" -e 's/^$symcode$symcode* .* \(lib.*\)$/  {\"\1\", (void *) \&\1},/p'"\
+" -e 's/^$symcode$symcode* .* \(.*\)$/  {\"lib\1\", (void *) \&\1},/p'"
+
+# Handle CRLF in mingw tool chain
+opt_cr=
+case $build_os in
+mingw*)
+  opt_cr=`$ECHO 'x\{0,1\}' | tr x '\015'` # option cr in regexp
+  ;;
+esac
+
+# Try without a prefix underscore, then with it.
+for ac_symprfx in "" "_"; do
+
+  # Transform symcode, sympat, and symprfx into a raw symbol and a C symbol.
+  symxfrm="\\1 $ac_symprfx\\2 \\2"
+
+  # Write the raw and C identifiers.
+  if test "$lt_cv_nm_interface" = "MS dumpbin"; then
+    # Fake it for dumpbin and say T for any non-static function,
+    # D for any global variable and I for any imported variable.
+    # Also find C++ and __fastcall symbols from MSVC++,
+    # which start with @ or ?.
+    lt_cv_sys_global_symbol_pipe="$AWK ['"\
+"     {last_section=section; section=\$ 3};"\
+"     /^COFF SYMBOL TABLE/{for(i in hide) delete hide[i]};"\
+"     /Section length .*#relocs.*(pick any)/{hide[last_section]=1};"\
+"     /^ *Symbol name *: /{split(\$ 0,sn,\":\"); si=substr(sn[2],2)};"\
+"     /^ *Type *: code/{print \"T\",si,substr(si,length(prfx))};"\
+"     /^ *Type *: data/{print \"I\",si,substr(si,length(prfx))};"\
+"     \$ 0!~/External *\|/{next};"\
+"     / 0+ UNDEF /{next}; / UNDEF \([^|]\)*()/{next};"\
+"     {if(hide[section]) next};"\
+"     {f=\"D\"}; \$ 0~/\(\).*\|/{f=\"T\"};"\
+"     {split(\$ 0,a,/\||\r/); split(a[2],s)};"\
+"     s[1]~/^[@?]/{print f,s[1],s[1]; next};"\
+"     s[1]~prfx {split(s[1],t,\"@\"); print f,t[1],substr(t[1],length(prfx))}"\
+"     ' prfx=^$ac_symprfx]"
+  else
+    lt_cv_sys_global_symbol_pipe="sed -n -e 's/^.*[[	 ]]\($symcode$symcode*\)[[	 ]][[	 ]]*$ac_symprfx$sympat$opt_cr$/$symxfrm/p'"
+  fi
+  lt_cv_sys_global_symbol_pipe="$lt_cv_sys_global_symbol_pipe | sed '/ __gnu_lto/d'"
+
+  # Check to see that the pipe works correctly.
+  pipe_works=no
+
+  rm -f conftest*
+  cat > conftest.$ac_ext <<_LT_EOF
+#ifdef __cplusplus
+extern "C" {
+#endif
+char nm_test_var;
+void nm_test_func(void);
+void nm_test_func(void){}
+#ifdef __cplusplus
+}
+#endif
+int main(){nm_test_var='a';nm_test_func();return(0);}
+_LT_EOF
+
+  if AC_TRY_EVAL(ac_compile); then
+    # Now try to grab the symbols.
+    nlist=conftest.nm
+    if AC_TRY_EVAL(NM conftest.$ac_objext \| "$lt_cv_sys_global_symbol_pipe" \> $nlist) && test -s "$nlist"; then
+      # Try sorting and uniquifying the output.
+      if sort "$nlist" | uniq > "$nlist"T; then
+	mv -f "$nlist"T "$nlist"
+      else
+	rm -f "$nlist"T
+      fi
+
+      # Make sure that we snagged all the symbols we need.
+      if $GREP ' nm_test_var$' "$nlist" >/dev/null; then
+	if $GREP ' nm_test_func$' "$nlist" >/dev/null; then
+	  cat <<_LT_EOF > conftest.$ac_ext
+/* Keep this code in sync between libtool.m4, ltmain, lt_system.h, and tests.  */
+#if defined _WIN32 || defined __CYGWIN__ || defined _WIN32_WCE
+/* DATA imports from DLLs on WIN32 can't be const, because runtime
+   relocations are performed -- see ld's documentation on pseudo-relocs.  */
+# define LT@&t@_DLSYM_CONST
+#elif defined __osf__
+/* This system does not cope well with relocations in const data.  */
+# define LT@&t@_DLSYM_CONST
+#else
+# define LT@&t@_DLSYM_CONST const
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+_LT_EOF
+	  # Now generate the symbol file.
+	  eval "$lt_cv_sys_global_symbol_to_cdecl"' < "$nlist" | $GREP -v main >> conftest.$ac_ext'
+
+	  cat <<_LT_EOF >> conftest.$ac_ext
+
+/* The mapping between symbol names and symbols.  */
+LT@&t@_DLSYM_CONST struct {
+  const char *name;
+  void       *address;
+}
+lt__PROGRAM__LTX_preloaded_symbols[[]] =
+{
+  { "@PROGRAM@", (void *) 0 },
+_LT_EOF
+	  $SED "s/^$symcode$symcode* .* \(.*\)$/  {\"\1\", (void *) \&\1},/" < "$nlist" | $GREP -v main >> conftest.$ac_ext
+	  cat <<\_LT_EOF >> conftest.$ac_ext
+  {0, (void *) 0}
+};
+
+/* This works around a problem in FreeBSD linker */
+#ifdef FREEBSD_WORKAROUND
+static const void *lt_preloaded_setup() {
+  return lt__PROGRAM__LTX_preloaded_symbols;
+}
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+_LT_EOF
+	  # Now try linking the two files.
+	  mv conftest.$ac_objext conftstm.$ac_objext
+	  lt_globsym_save_LIBS=$LIBS
+	  lt_globsym_save_CFLAGS=$CFLAGS
+	  LIBS=conftstm.$ac_objext
+	  CFLAGS="$CFLAGS$_LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1)"
+	  if AC_TRY_EVAL(ac_link) && test -s conftest$ac_exeext; then
+	    pipe_works=yes
+	  fi
+	  LIBS=$lt_globsym_save_LIBS
+	  CFLAGS=$lt_globsym_save_CFLAGS
+	else
+	  echo "cannot find nm_test_func in $nlist" >&AS_MESSAGE_LOG_FD
+	fi
+      else
+	echo "cannot find nm_test_var in $nlist" >&AS_MESSAGE_LOG_FD
+      fi
+    else
+      echo "cannot run $lt_cv_sys_global_symbol_pipe" >&AS_MESSAGE_LOG_FD
+    fi
+  else
+    echo "$progname: failed program was:" >&AS_MESSAGE_LOG_FD
+    cat conftest.$ac_ext >&5
+  fi
+  rm -rf conftest* conftst*
+
+  # Do not use the global_symbol_pipe unless it works.
+  if test yes = "$pipe_works"; then
+    break
+  else
+    lt_cv_sys_global_symbol_pipe=
+  fi
+done
+])
+if test -z "$lt_cv_sys_global_symbol_pipe"; then
+  lt_cv_sys_global_symbol_to_cdecl=
+fi
+if test -z "$lt_cv_sys_global_symbol_pipe$lt_cv_sys_global_symbol_to_cdecl"; then
+  AC_MSG_RESULT(failed)
+else
+  AC_MSG_RESULT(ok)
+fi
+
+# Response file support.
+if test "$lt_cv_nm_interface" = "MS dumpbin"; then
+  nm_file_list_spec='@'
+elif $NM --help 2>/dev/null | grep '[[@]]FILE' >/dev/null; then
+  nm_file_list_spec='@'
+fi
+
+_LT_DECL([global_symbol_pipe], [lt_cv_sys_global_symbol_pipe], [1],
+    [Take the output of nm and produce a listing of raw symbols and C names])
+_LT_DECL([global_symbol_to_cdecl], [lt_cv_sys_global_symbol_to_cdecl], [1],
+    [Transform the output of nm in a proper C declaration])
+_LT_DECL([global_symbol_to_import], [lt_cv_sys_global_symbol_to_import], [1],
+    [Transform the output of nm into a list of symbols to manually relocate])
+_LT_DECL([global_symbol_to_c_name_address],
+    [lt_cv_sys_global_symbol_to_c_name_address], [1],
+    [Transform the output of nm in a C name address pair])
+_LT_DECL([global_symbol_to_c_name_address_lib_prefix],
+    [lt_cv_sys_global_symbol_to_c_name_address_lib_prefix], [1],
+    [Transform the output of nm in a C name address pair when lib prefix is needed])
+_LT_DECL([nm_interface], [lt_cv_nm_interface], [1],
+    [The name lister interface])
+_LT_DECL([], [nm_file_list_spec], [1],
+    [Specify filename containing input files for $NM])
+]) # _LT_CMD_GLOBAL_SYMBOLS
+
+
+# _LT_COMPILER_PIC([TAGNAME])
+# ---------------------------
+m4_defun([_LT_COMPILER_PIC],
+[m4_require([_LT_TAG_COMPILER])dnl
+_LT_TAGVAR(lt_prog_compiler_wl, $1)=
+_LT_TAGVAR(lt_prog_compiler_pic, $1)=
+_LT_TAGVAR(lt_prog_compiler_static, $1)=
+
+m4_if([$1], [CXX], [
+  # C++ specific cases for pic, static, wl, etc.
+  if test yes = "$GXX"; then
+    _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+    _LT_TAGVAR(lt_prog_compiler_static, $1)='-static'
+
+    case $host_os in
+    aix*)
+      # All AIX code is PIC.
+      if test ia64 = "$host_cpu"; then
+	# AIX 5 now supports IA64 processor
+	_LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+      fi
+      _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC'
+      ;;
+
+    amigaos*)
+      case $host_cpu in
+      powerpc)
+            # see comment about AmigaOS4 .so support
+            _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC'
+        ;;
+      m68k)
+            # FIXME: we need at least 68020 code to build shared libraries, but
+            # adding the '-m68020' flag to GCC prevents building anything better,
+            # like '-m68040'.
+            _LT_TAGVAR(lt_prog_compiler_pic, $1)='-m68020 -resident32 -malways-restore-a4'
+        ;;
+      esac
+      ;;
+
+    beos* | irix5* | irix6* | nonstopux* | osf3* | osf4* | osf5*)
+      # PIC is the default for these OSes.
+      ;;
+    mingw* | cygwin* | os2* | pw32* | cegcc*)
+      # This hack is so that the source file can tell whether it is being
+      # built for inclusion in a dll (and should export symbols for example).
+      # Although the cygwin gcc ignores -fPIC, still need this for old-style
+      # (--disable-auto-import) libraries
+      m4_if([$1], [GCJ], [],
+	[_LT_TAGVAR(lt_prog_compiler_pic, $1)='-DDLL_EXPORT'])
+      case $host_os in
+      os2*)
+	_LT_TAGVAR(lt_prog_compiler_static, $1)='$wl-static'
+	;;
+      esac
+      ;;
+    darwin* | rhapsody*)
+      # PIC is the default on this platform
+      # Common symbols not allowed in MH_DYLIB files
+      _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fno-common'
+      ;;
+    *djgpp*)
+      # DJGPP does not support shared libraries at all
+      _LT_TAGVAR(lt_prog_compiler_pic, $1)=
+      ;;
+    haiku*)
+      # PIC is the default for Haiku.
+      # The "-static" flag exists, but is broken.
+      _LT_TAGVAR(lt_prog_compiler_static, $1)=
+      ;;
+    interix[[3-9]]*)
+      # Interix 3.x gcc -fpic/-fPIC options generate broken code.
+      # Instead, we relocate shared libraries at runtime.
+      ;;
+    sysv4*MP*)
+      if test -d /usr/nec; then
+	_LT_TAGVAR(lt_prog_compiler_pic, $1)=-Kconform_pic
+      fi
+      ;;
+    hpux*)
+      # PIC is the default for 64-bit PA HP-UX, but not for 32-bit
+      # PA HP-UX.  On IA64 HP-UX, PIC is the default but the pic flag
+      # sets the default TLS model and affects inlining.
+      case $host_cpu in
+      hppa*64*)
+	;;
+      *)
+	_LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC'
+	;;
+      esac
+      ;;
+    *qnx* | *nto*)
+      # QNX uses GNU C++, but need to define -shared option too, otherwise
+      # it will coredump.
+      _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC -shared'
+      ;;
+    *)
+      _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC'
+      ;;
+    esac
+  else
+    case $host_os in
+      aix[[4-9]]*)
+	# All AIX code is PIC.
+	if test ia64 = "$host_cpu"; then
+	  # AIX 5 now supports IA64 processor
+	  _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+	else
+	  _LT_TAGVAR(lt_prog_compiler_static, $1)='-bnso -bI:/lib/syscalls.exp'
+	fi
+	;;
+      chorus*)
+	case $cc_basename in
+	cxch68*)
+	  # Green Hills C++ Compiler
+	  # _LT_TAGVAR(lt_prog_compiler_static, $1)="--no_auto_instantiation -u __main -u __premain -u _abort -r $COOL_DIR/lib/libOrb.a $MVME_DIR/lib/CC/libC.a $MVME_DIR/lib/classix/libcx.s.a"
+	  ;;
+	esac
+	;;
+      mingw* | cygwin* | os2* | pw32* | cegcc*)
+	# This hack is so that the source file can tell whether it is being
+	# built for inclusion in a dll (and should export symbols for example).
+	m4_if([$1], [GCJ], [],
+	  [_LT_TAGVAR(lt_prog_compiler_pic, $1)='-DDLL_EXPORT'])
+	;;
+      dgux*)
+	case $cc_basename in
+	  ec++*)
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC'
+	    ;;
+	  ghcx*)
+	    # Green Hills C++ Compiler
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)='-pic'
+	    ;;
+	  *)
+	    ;;
+	esac
+	;;
+      freebsd* | dragonfly*)
+	# FreeBSD uses GNU C++
+	;;
+      hpux9* | hpux10* | hpux11*)
+	case $cc_basename in
+	  CC*)
+	    _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	    _LT_TAGVAR(lt_prog_compiler_static, $1)='$wl-a ${wl}archive'
+	    if test ia64 != "$host_cpu"; then
+	      _LT_TAGVAR(lt_prog_compiler_pic, $1)='+Z'
+	    fi
+	    ;;
+	  aCC*)
+	    _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	    _LT_TAGVAR(lt_prog_compiler_static, $1)='$wl-a ${wl}archive'
+	    case $host_cpu in
+	    hppa*64*|ia64*)
+	      # +Z the default
+	      ;;
+	    *)
+	      _LT_TAGVAR(lt_prog_compiler_pic, $1)='+Z'
+	      ;;
+	    esac
+	    ;;
+	  *)
+	    ;;
+	esac
+	;;
+      interix*)
+	# This is c89, which is MS Visual C++ (no shared libs)
+	# Anyone wants to do a port?
+	;;
+      irix5* | irix6* | nonstopux*)
+	case $cc_basename in
+	  CC*)
+	    _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	    _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared'
+	    # CC pic flag -KPIC is the default.
+	    ;;
+	  *)
+	    ;;
+	esac
+	;;
+      linux* | k*bsd*-gnu | kopensolaris*-gnu | gnu*)
+	case $cc_basename in
+	  KCC*)
+	    # KAI C++ Compiler
+	    _LT_TAGVAR(lt_prog_compiler_wl, $1)='--backend -Wl,'
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC'
+	    ;;
+	  ecpc* )
+	    # old Intel C++ for x86_64, which still supported -KPIC.
+	    _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC'
+	    _LT_TAGVAR(lt_prog_compiler_static, $1)='-static'
+	    ;;
+	  icpc* )
+	    # Intel C++, used to be incompatible with GCC.
+	    # ICC 10 doesn't accept -KPIC any more.
+	    _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC'
+	    _LT_TAGVAR(lt_prog_compiler_static, $1)='-static'
+	    ;;
+	  pgCC* | pgcpp*)
+	    # Portland Group C++ compiler
+	    _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fpic'
+	    _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+	    ;;
+	  cxx*)
+	    # Compaq C++
+	    # Make sure the PIC flag is empty.  It appears that all Alpha
+	    # Linux and Compaq Tru64 Unix objects are PIC.
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)=
+	    _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared'
+	    ;;
+	  xlc* | xlC* | bgxl[[cC]]* | mpixl[[cC]]*)
+	    # IBM XL 8.0, 9.0 on PPC and BlueGene
+	    _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)='-qpic'
+	    _LT_TAGVAR(lt_prog_compiler_static, $1)='-qstaticlink'
+	    ;;
+	  *)
+	    case `$CC -V 2>&1 | sed 5q` in
+	    *Sun\ C*)
+	      # Sun C++ 5.9
+	      _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC'
+	      _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+	      _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Qoption ld '
+	      ;;
+	    esac
+	    ;;
+	esac
+	;;
+      lynxos*)
+	;;
+      m88k*)
+	;;
+      mvs*)
+	case $cc_basename in
+	  cxx*)
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)='-W c,exportall'
+	    ;;
+	  *)
+	    ;;
+	esac
+	;;
+      netbsd* | netbsdelf*-gnu)
+	;;
+      *qnx* | *nto*)
+        # QNX uses GNU C++, but need to define -shared option too, otherwise
+        # it will coredump.
+        _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC -shared'
+        ;;
+      osf3* | osf4* | osf5*)
+	case $cc_basename in
+	  KCC*)
+	    _LT_TAGVAR(lt_prog_compiler_wl, $1)='--backend -Wl,'
+	    ;;
+	  RCC*)
+	    # Rational C++ 2.4.1
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)='-pic'
+	    ;;
+	  cxx*)
+	    # Digital/Compaq C++
+	    _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	    # Make sure the PIC flag is empty.  It appears that all Alpha
+	    # Linux and Compaq Tru64 Unix objects are PIC.
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)=
+	    _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared'
+	    ;;
+	  *)
+	    ;;
+	esac
+	;;
+      psos*)
+	;;
+      solaris*)
+	case $cc_basename in
+	  CC* | sunCC*)
+	    # Sun C++ 4.2, 5.x and Centerline C++
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC'
+	    _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+	    _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Qoption ld '
+	    ;;
+	  gcx*)
+	    # Green Hills C++ Compiler
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)='-PIC'
+	    ;;
+	  *)
+	    ;;
+	esac
+	;;
+      sunos4*)
+	case $cc_basename in
+	  CC*)
+	    # Sun C++ 4.x
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)='-pic'
+	    _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+	    ;;
+	  lcc*)
+	    # Lucid
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)='-pic'
+	    ;;
+	  *)
+	    ;;
+	esac
+	;;
+      sysv5* | unixware* | sco3.2v5* | sco5v6* | OpenUNIX*)
+	case $cc_basename in
+	  CC*)
+	    _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC'
+	    _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+	    ;;
+	esac
+	;;
+      tandem*)
+	case $cc_basename in
+	  NCC*)
+	    # NonStop-UX NCC 3.20
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC'
+	    ;;
+	  *)
+	    ;;
+	esac
+	;;
+      vxworks*)
+	;;
+      *)
+	_LT_TAGVAR(lt_prog_compiler_can_build_shared, $1)=no
+	;;
+    esac
+  fi
+],
+[
+  if test yes = "$GCC"; then
+    _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+    _LT_TAGVAR(lt_prog_compiler_static, $1)='-static'
+
+    case $host_os in
+      aix*)
+      # All AIX code is PIC.
+      if test ia64 = "$host_cpu"; then
+	# AIX 5 now supports IA64 processor
+	_LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+      fi
+      _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC'
+      ;;
+
+    amigaos*)
+      case $host_cpu in
+      powerpc)
+            # see comment about AmigaOS4 .so support
+            _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC'
+        ;;
+      m68k)
+            # FIXME: we need at least 68020 code to build shared libraries, but
+            # adding the '-m68020' flag to GCC prevents building anything better,
+            # like '-m68040'.
+            _LT_TAGVAR(lt_prog_compiler_pic, $1)='-m68020 -resident32 -malways-restore-a4'
+        ;;
+      esac
+      ;;
+
+    beos* | irix5* | irix6* | nonstopux* | osf3* | osf4* | osf5*)
+      # PIC is the default for these OSes.
+      ;;
+
+    mingw* | cygwin* | pw32* | os2* | cegcc*)
+      # This hack is so that the source file can tell whether it is being
+      # built for inclusion in a dll (and should export symbols for example).
+      # Although the cygwin gcc ignores -fPIC, still need this for old-style
+      # (--disable-auto-import) libraries
+      m4_if([$1], [GCJ], [],
+	[_LT_TAGVAR(lt_prog_compiler_pic, $1)='-DDLL_EXPORT'])
+      case $host_os in
+      os2*)
+	_LT_TAGVAR(lt_prog_compiler_static, $1)='$wl-static'
+	;;
+      esac
+      ;;
+
+    darwin* | rhapsody*)
+      # PIC is the default on this platform
+      # Common symbols not allowed in MH_DYLIB files
+      _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fno-common'
+      ;;
+
+    haiku*)
+      # PIC is the default for Haiku.
+      # The "-static" flag exists, but is broken.
+      _LT_TAGVAR(lt_prog_compiler_static, $1)=
+      ;;
+
+    hpux*)
+      # PIC is the default for 64-bit PA HP-UX, but not for 32-bit
+      # PA HP-UX.  On IA64 HP-UX, PIC is the default but the pic flag
+      # sets the default TLS model and affects inlining.
+      case $host_cpu in
+      hppa*64*)
+	# +Z the default
+	;;
+      *)
+	_LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC'
+	;;
+      esac
+      ;;
+
+    interix[[3-9]]*)
+      # Interix 3.x gcc -fpic/-fPIC options generate broken code.
+      # Instead, we relocate shared libraries at runtime.
+      ;;
+
+    msdosdjgpp*)
+      # Just because we use GCC doesn't mean we suddenly get shared libraries
+      # on systems that don't support them.
+      _LT_TAGVAR(lt_prog_compiler_can_build_shared, $1)=no
+      enable_shared=no
+      ;;
+
+    *nto* | *qnx*)
+      # QNX uses GNU C++, but need to define -shared option too, otherwise
+      # it will coredump.
+      _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC -shared'
+      ;;
+
+    sysv4*MP*)
+      if test -d /usr/nec; then
+	_LT_TAGVAR(lt_prog_compiler_pic, $1)=-Kconform_pic
+      fi
+      ;;
+
+    *)
+      _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC'
+      ;;
+    esac
+
+    case $cc_basename in
+    nvcc*) # Cuda Compiler Driver 2.2
+      _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Xlinker '
+      if test -n "$_LT_TAGVAR(lt_prog_compiler_pic, $1)"; then
+        _LT_TAGVAR(lt_prog_compiler_pic, $1)="-Xcompiler $_LT_TAGVAR(lt_prog_compiler_pic, $1)"
+      fi
+      ;;
+    esac
+  else
+    # PORTME Check for flag to pass linker flags through the system compiler.
+    case $host_os in
+    aix*)
+      _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+      if test ia64 = "$host_cpu"; then
+	# AIX 5 now supports IA64 processor
+	_LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+      else
+	_LT_TAGVAR(lt_prog_compiler_static, $1)='-bnso -bI:/lib/syscalls.exp'
+      fi
+      ;;
+
+    darwin* | rhapsody*)
+      # PIC is the default on this platform
+      # Common symbols not allowed in MH_DYLIB files
+      _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fno-common'
+      case $cc_basename in
+      nagfor*)
+        # NAG Fortran compiler
+        _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,-Wl,,'
+        _LT_TAGVAR(lt_prog_compiler_pic, $1)='-PIC'
+        _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+        ;;
+      esac
+      ;;
+
+    mingw* | cygwin* | pw32* | os2* | cegcc*)
+      # This hack is so that the source file can tell whether it is being
+      # built for inclusion in a dll (and should export symbols for example).
+      m4_if([$1], [GCJ], [],
+	[_LT_TAGVAR(lt_prog_compiler_pic, $1)='-DDLL_EXPORT'])
+      case $host_os in
+      os2*)
+	_LT_TAGVAR(lt_prog_compiler_static, $1)='$wl-static'
+	;;
+      esac
+      ;;
+
+    hpux9* | hpux10* | hpux11*)
+      _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+      # PIC is the default for IA64 HP-UX and 64-bit HP-UX, but
+      # not for PA HP-UX.
+      case $host_cpu in
+      hppa*64*|ia64*)
+	# +Z the default
+	;;
+      *)
+	_LT_TAGVAR(lt_prog_compiler_pic, $1)='+Z'
+	;;
+      esac
+      # Is there a better lt_prog_compiler_static that works with the bundled CC?
+      _LT_TAGVAR(lt_prog_compiler_static, $1)='$wl-a ${wl}archive'
+      ;;
+
+    irix5* | irix6* | nonstopux*)
+      _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+      # PIC (with -KPIC) is the default.
+      _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared'
+      ;;
+
+    linux* | k*bsd*-gnu | kopensolaris*-gnu | gnu*)
+      case $cc_basename in
+      # old Intel for x86_64, which still supported -KPIC.
+      ecc*)
+	_LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	_LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC'
+	_LT_TAGVAR(lt_prog_compiler_static, $1)='-static'
+        ;;
+      # icc used to be incompatible with GCC.
+      # ICC 10 doesn't accept -KPIC any more.
+      icc* | ifort*)
+	_LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	_LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC'
+	_LT_TAGVAR(lt_prog_compiler_static, $1)='-static'
+        ;;
+      # Lahey Fortran 8.1.
+      lf95*)
+	_LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	_LT_TAGVAR(lt_prog_compiler_pic, $1)='--shared'
+	_LT_TAGVAR(lt_prog_compiler_static, $1)='--static'
+	;;
+      nagfor*)
+	# NAG Fortran compiler
+	_LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,-Wl,,'
+	_LT_TAGVAR(lt_prog_compiler_pic, $1)='-PIC'
+	_LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+	;;
+      tcc*)
+	# Fabrice Bellard et al's Tiny C Compiler
+	_LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	_LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC'
+	_LT_TAGVAR(lt_prog_compiler_static, $1)='-static'
+	;;
+      pgcc* | pgf77* | pgf90* | pgf95* | pgfortran*)
+        # Portland Group compilers (*not* the Pentium gcc compiler,
+	# which looks to be a dead project)
+	_LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	_LT_TAGVAR(lt_prog_compiler_pic, $1)='-fpic'
+	_LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+        ;;
+      ccc*)
+        _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+        # All Alpha code is PIC.
+        _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared'
+        ;;
+      xl* | bgxl* | bgf* | mpixl*)
+	# IBM XL C 8.0/Fortran 10.1, 11.1 on PPC and BlueGene
+	_LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	_LT_TAGVAR(lt_prog_compiler_pic, $1)='-qpic'
+	_LT_TAGVAR(lt_prog_compiler_static, $1)='-qstaticlink'
+	;;
+      *)
+	case `$CC -V 2>&1 | sed 5q` in
+	*Sun\ Ceres\ Fortran* | *Sun*Fortran*\ [[1-7]].* | *Sun*Fortran*\ 8.[[0-3]]*)
+	  # Sun Fortran 8.3 passes all unrecognized flags to the linker
+	  _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC'
+	  _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+	  _LT_TAGVAR(lt_prog_compiler_wl, $1)=''
+	  ;;
+	*Sun\ F* | *Sun*Fortran*)
+	  _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC'
+	  _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+	  _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Qoption ld '
+	  ;;
+	*Sun\ C*)
+	  # Sun C 5.9
+	  _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC'
+	  _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+	  _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	  ;;
+        *Intel*\ [[CF]]*Compiler*)
+	  _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	  _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC'
+	  _LT_TAGVAR(lt_prog_compiler_static, $1)='-static'
+	  ;;
+	*Portland\ Group*)
+	  _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	  _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fpic'
+	  _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+	  ;;
+	esac
+	;;
+      esac
+      ;;
+
+    newsos6)
+      _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC'
+      _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+      ;;
+
+    *nto* | *qnx*)
+      # QNX uses GNU C++, but need to define -shared option too, otherwise
+      # it will coredump.
+      _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC -shared'
+      ;;
+
+    osf3* | osf4* | osf5*)
+      _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+      # All OSF/1 code is PIC.
+      _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared'
+      ;;
+
+    rdos*)
+      _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared'
+      ;;
+
+    solaris*)
+      _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC'
+      _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+      case $cc_basename in
+      f77* | f90* | f95* | sunf77* | sunf90* | sunf95*)
+	_LT_TAGVAR(lt_prog_compiler_wl, $1)='-Qoption ld ';;
+      *)
+	_LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,';;
+      esac
+      ;;
+
+    sunos4*)
+      _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Qoption ld '
+      _LT_TAGVAR(lt_prog_compiler_pic, $1)='-PIC'
+      _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+      ;;
+
+    sysv4 | sysv4.2uw2* | sysv4.3*)
+      _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+      _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC'
+      _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+      ;;
+
+    sysv4*MP*)
+      if test -d /usr/nec; then
+	_LT_TAGVAR(lt_prog_compiler_pic, $1)='-Kconform_pic'
+	_LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+      fi
+      ;;
+
+    sysv5* | unixware* | sco3.2v5* | sco5v6* | OpenUNIX*)
+      _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+      _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC'
+      _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+      ;;
+
+    unicos*)
+      _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+      _LT_TAGVAR(lt_prog_compiler_can_build_shared, $1)=no
+      ;;
+
+    uts4*)
+      _LT_TAGVAR(lt_prog_compiler_pic, $1)='-pic'
+      _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+      ;;
+
+    *)
+      _LT_TAGVAR(lt_prog_compiler_can_build_shared, $1)=no
+      ;;
+    esac
+  fi
+])
+case $host_os in
+  # For platforms that do not support PIC, -DPIC is meaningless:
+  *djgpp*)
+    _LT_TAGVAR(lt_prog_compiler_pic, $1)=
+    ;;
+  *)
+    _LT_TAGVAR(lt_prog_compiler_pic, $1)="$_LT_TAGVAR(lt_prog_compiler_pic, $1)@&t@m4_if([$1],[],[ -DPIC],[m4_if([$1],[CXX],[ -DPIC],[])])"
+    ;;
+esac
+
+AC_CACHE_CHECK([for $compiler option to produce PIC],
+  [_LT_TAGVAR(lt_cv_prog_compiler_pic, $1)],
+  [_LT_TAGVAR(lt_cv_prog_compiler_pic, $1)=$_LT_TAGVAR(lt_prog_compiler_pic, $1)])
+_LT_TAGVAR(lt_prog_compiler_pic, $1)=$_LT_TAGVAR(lt_cv_prog_compiler_pic, $1)
+
+#
+# Check to make sure the PIC flag actually works.
+#
+if test -n "$_LT_TAGVAR(lt_prog_compiler_pic, $1)"; then
+  _LT_COMPILER_OPTION([if $compiler PIC flag $_LT_TAGVAR(lt_prog_compiler_pic, $1) works],
+    [_LT_TAGVAR(lt_cv_prog_compiler_pic_works, $1)],
+    [$_LT_TAGVAR(lt_prog_compiler_pic, $1)@&t@m4_if([$1],[],[ -DPIC],[m4_if([$1],[CXX],[ -DPIC],[])])], [],
+    [case $_LT_TAGVAR(lt_prog_compiler_pic, $1) in
+     "" | " "*) ;;
+     *) _LT_TAGVAR(lt_prog_compiler_pic, $1)=" $_LT_TAGVAR(lt_prog_compiler_pic, $1)" ;;
+     esac],
+    [_LT_TAGVAR(lt_prog_compiler_pic, $1)=
+     _LT_TAGVAR(lt_prog_compiler_can_build_shared, $1)=no])
+fi
+_LT_TAGDECL([pic_flag], [lt_prog_compiler_pic], [1],
+	[Additional compiler flags for building library objects])
+
+_LT_TAGDECL([wl], [lt_prog_compiler_wl], [1],
+	[How to pass a linker flag through the compiler])
+#
+# Check to make sure the static flag actually works.
+#
+wl=$_LT_TAGVAR(lt_prog_compiler_wl, $1) eval lt_tmp_static_flag=\"$_LT_TAGVAR(lt_prog_compiler_static, $1)\"
+_LT_LINKER_OPTION([if $compiler static flag $lt_tmp_static_flag works],
+  _LT_TAGVAR(lt_cv_prog_compiler_static_works, $1),
+  $lt_tmp_static_flag,
+  [],
+  [_LT_TAGVAR(lt_prog_compiler_static, $1)=])
+_LT_TAGDECL([link_static_flag], [lt_prog_compiler_static], [1],
+	[Compiler flag to prevent dynamic linking])
+])# _LT_COMPILER_PIC
+
+
+# _LT_LINKER_SHLIBS([TAGNAME])
+# ----------------------------
+# See if the linker supports building shared libraries.
+m4_defun([_LT_LINKER_SHLIBS],
+[AC_REQUIRE([LT_PATH_LD])dnl
+AC_REQUIRE([LT_PATH_NM])dnl
+m4_require([_LT_PATH_MANIFEST_TOOL])dnl
+m4_require([_LT_FILEUTILS_DEFAULTS])dnl
+m4_require([_LT_DECL_EGREP])dnl
+m4_require([_LT_DECL_SED])dnl
+m4_require([_LT_CMD_GLOBAL_SYMBOLS])dnl
+m4_require([_LT_TAG_COMPILER])dnl
+AC_MSG_CHECKING([whether the $compiler linker ($LD) supports shared libraries])
+m4_if([$1], [CXX], [
+  _LT_TAGVAR(export_symbols_cmds, $1)='$NM $libobjs $convenience | $global_symbol_pipe | $SED '\''s/.* //'\'' | sort | uniq > $export_symbols'
+  _LT_TAGVAR(exclude_expsyms, $1)=['_GLOBAL_OFFSET_TABLE_|_GLOBAL__F[ID]_.*']
+  case $host_os in
+  aix[[4-9]]*)
+    # If we're using GNU nm, then we don't want the "-C" option.
+    # -C means demangle to GNU nm, but means don't demangle to AIX nm.
+    # Without the "-l" option, or with the "-B" option, AIX nm treats
+    # weak defined symbols like other global defined symbols, whereas
+    # GNU nm marks them as "W".
+    # While the 'weak' keyword is ignored in the Export File, we need
+    # it in the Import File for the 'aix-soname' feature, so we have
+    # to replace the "-B" option with "-P" for AIX nm.
+    if $NM -V 2>&1 | $GREP 'GNU' > /dev/null; then
+      _LT_TAGVAR(export_symbols_cmds, $1)='$NM -Bpg $libobjs $convenience | awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B") || (\$ 2 == "W")) && ([substr](\$ 3,1,1) != ".")) { if (\$ 2 == "W") { print \$ 3 " weak" } else { print \$ 3 } } }'\'' | sort -u > $export_symbols'
+    else
+      _LT_TAGVAR(export_symbols_cmds, $1)='`func_echo_all $NM | $SED -e '\''s/B\([[^B]]*\)$/P\1/'\''` -PCpgl $libobjs $convenience | awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B") || (\$ 2 == "W") || (\$ 2 == "V") || (\$ 2 == "Z")) && ([substr](\$ 1,1,1) != ".")) { if ((\$ 2 == "W") || (\$ 2 == "V") || (\$ 2 == "Z")) { print \$ 1 " weak" } else { print \$ 1 } } }'\'' | sort -u > $export_symbols'
+    fi
+    ;;
+  pw32*)
+    _LT_TAGVAR(export_symbols_cmds, $1)=$ltdll_cmds
+    ;;
+  cygwin* | mingw* | cegcc*)
+    case $cc_basename in
+    cl*)
+      _LT_TAGVAR(exclude_expsyms, $1)='_NULL_IMPORT_DESCRIPTOR|_IMPORT_DESCRIPTOR_.*'
+      ;;
+    *)
+      _LT_TAGVAR(export_symbols_cmds, $1)='$NM $libobjs $convenience | $global_symbol_pipe | $SED -e '\''/^[[BCDGRS]][[ ]]/s/.*[[ ]]\([[^ ]]*\)/\1 DATA/;s/^.*[[ ]]__nm__\([[^ ]]*\)[[ ]][[^ ]]*/\1 DATA/;/^I[[ ]]/d;/^[[AITW]][[ ]]/s/.* //'\'' | sort | uniq > $export_symbols'
+      _LT_TAGVAR(exclude_expsyms, $1)=['[_]+GLOBAL_OFFSET_TABLE_|[_]+GLOBAL__[FID]_.*|[_]+head_[A-Za-z0-9_]+_dll|[A-Za-z0-9_]+_dll_iname']
+      ;;
+    esac
+    ;;
+  linux* | k*bsd*-gnu | gnu*)
+    _LT_TAGVAR(link_all_deplibs, $1)=no
+    ;;
+  *)
+    _LT_TAGVAR(export_symbols_cmds, $1)='$NM $libobjs $convenience | $global_symbol_pipe | $SED '\''s/.* //'\'' | sort | uniq > $export_symbols'
+    ;;
+  esac
+], [
+  runpath_var=
+  _LT_TAGVAR(allow_undefined_flag, $1)=
+  _LT_TAGVAR(always_export_symbols, $1)=no
+  _LT_TAGVAR(archive_cmds, $1)=
+  _LT_TAGVAR(archive_expsym_cmds, $1)=
+  _LT_TAGVAR(compiler_needs_object, $1)=no
+  _LT_TAGVAR(enable_shared_with_static_runtimes, $1)=no
+  _LT_TAGVAR(export_dynamic_flag_spec, $1)=
+  _LT_TAGVAR(export_symbols_cmds, $1)='$NM $libobjs $convenience | $global_symbol_pipe | $SED '\''s/.* //'\'' | sort | uniq > $export_symbols'
+  _LT_TAGVAR(hardcode_automatic, $1)=no
+  _LT_TAGVAR(hardcode_direct, $1)=no
+  _LT_TAGVAR(hardcode_direct_absolute, $1)=no
+  _LT_TAGVAR(hardcode_libdir_flag_spec, $1)=
+  _LT_TAGVAR(hardcode_libdir_separator, $1)=
+  _LT_TAGVAR(hardcode_minus_L, $1)=no
+  _LT_TAGVAR(hardcode_shlibpath_var, $1)=unsupported
+  _LT_TAGVAR(inherit_rpath, $1)=no
+  _LT_TAGVAR(link_all_deplibs, $1)=unknown
+  _LT_TAGVAR(module_cmds, $1)=
+  _LT_TAGVAR(module_expsym_cmds, $1)=
+  _LT_TAGVAR(old_archive_from_new_cmds, $1)=
+  _LT_TAGVAR(old_archive_from_expsyms_cmds, $1)=
+  _LT_TAGVAR(thread_safe_flag_spec, $1)=
+  _LT_TAGVAR(whole_archive_flag_spec, $1)=
+  # include_expsyms should be a list of space-separated symbols to be *always*
+  # included in the symbol list
+  _LT_TAGVAR(include_expsyms, $1)=
+  # exclude_expsyms can be an extended regexp of symbols to exclude
+  # it will be wrapped by ' (' and ')$', so one must not match beginning or
+  # end of line.  Example: 'a|bc|.*d.*' will exclude the symbols 'a' and 'bc',
+  # as well as any symbol that contains 'd'.
+  _LT_TAGVAR(exclude_expsyms, $1)=['_GLOBAL_OFFSET_TABLE_|_GLOBAL__F[ID]_.*']
+  # Although _GLOBAL_OFFSET_TABLE_ is a valid symbol C name, most a.out
+  # platforms (ab)use it in PIC code, but their linkers get confused if
+  # the symbol is explicitly referenced.  Since portable code cannot
+  # rely on this symbol name, it's probably fine to never include it in
+  # preloaded symbol tables.
+  # Exclude shared library initialization/finalization symbols.
+dnl Note also adjust exclude_expsyms for C++ above.
+  extract_expsyms_cmds=
+
+  case $host_os in
+  cygwin* | mingw* | pw32* | cegcc*)
+    # FIXME: the MSVC++ port hasn't been tested in a loooong time
+    # When not using gcc, we currently assume that we are using
+    # Microsoft Visual C++.
+    if test yes != "$GCC"; then
+      with_gnu_ld=no
+    fi
+    ;;
+  interix*)
+    # we just hope/assume this is gcc and not c89 (= MSVC++)
+    with_gnu_ld=yes
+    ;;
+  openbsd* | bitrig*)
+    with_gnu_ld=no
+    ;;
+  linux* | k*bsd*-gnu | gnu*)
+    _LT_TAGVAR(link_all_deplibs, $1)=no
+    ;;
+  esac
+
+  _LT_TAGVAR(ld_shlibs, $1)=yes
+
+  # On some targets, GNU ld is compatible enough with the native linker
+  # that we're better off using the native interface for both.
+  lt_use_gnu_ld_interface=no
+  if test yes = "$with_gnu_ld"; then
+    case $host_os in
+      aix*)
+	# The AIX port of GNU ld has always aspired to compatibility
+	# with the native linker.  However, as the warning in the GNU ld
+	# block says, versions before 2.19.5* couldn't really create working
+	# shared libraries, regardless of the interface used.
+	case `$LD -v 2>&1` in
+	  *\ \(GNU\ Binutils\)\ 2.19.5*) ;;
+	  *\ \(GNU\ Binutils\)\ 2.[[2-9]]*) ;;
+	  *\ \(GNU\ Binutils\)\ [[3-9]]*) ;;
+	  *)
+	    lt_use_gnu_ld_interface=yes
+	    ;;
+	esac
+	;;
+      *)
+	lt_use_gnu_ld_interface=yes
+	;;
+    esac
+  fi
+
+  if test yes = "$lt_use_gnu_ld_interface"; then
+    # If archive_cmds runs LD, not CC, wlarc should be empty
+    wlarc='$wl'
+
+    # Set some defaults for GNU ld with shared library support. These
+    # are reset later if shared libraries are not supported. Putting them
+    # here allows them to be overridden if necessary.
+    runpath_var=LD_RUN_PATH
+    _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-rpath $wl$libdir'
+    _LT_TAGVAR(export_dynamic_flag_spec, $1)='$wl--export-dynamic'
+    # ancient GNU ld didn't support --whole-archive et. al.
+    if $LD --help 2>&1 | $GREP 'no-whole-archive' > /dev/null; then
+      _LT_TAGVAR(whole_archive_flag_spec, $1)=$wlarc'--whole-archive$convenience '$wlarc'--no-whole-archive'
+    else
+      _LT_TAGVAR(whole_archive_flag_spec, $1)=
+    fi
+    supports_anon_versioning=no
+    case `$LD -v | $SED -e 's/([^)]\+)\s\+//' 2>&1` in
+      *GNU\ gold*) supports_anon_versioning=yes ;;
+      *\ [[01]].* | *\ 2.[[0-9]].* | *\ 2.10.*) ;; # catch versions < 2.11
+      *\ 2.11.93.0.2\ *) supports_anon_versioning=yes ;; # RH7.3 ...
+      *\ 2.11.92.0.12\ *) supports_anon_versioning=yes ;; # Mandrake 8.2 ...
+      *\ 2.11.*) ;; # other 2.11 versions
+      *) supports_anon_versioning=yes ;;
+    esac
+
+    # See if GNU ld supports shared libraries.
+    case $host_os in
+    aix[[3-9]]*)
+      # On AIX/PPC, the GNU linker is very broken
+      if test ia64 != "$host_cpu"; then
+	_LT_TAGVAR(ld_shlibs, $1)=no
+	cat <<_LT_EOF 1>&2
+
+*** Warning: the GNU linker, at least up to release 2.19, is reported
+*** to be unable to reliably create shared libraries on AIX.
+*** Therefore, libtool is disabling shared libraries support.  If you
+*** really care for shared libraries, you may want to install binutils
+*** 2.20 or above, or modify your PATH so that a non-GNU linker is found.
+*** You will then need to restart the configuration process.
+
+_LT_EOF
+      fi
+      ;;
+
+    amigaos*)
+      case $host_cpu in
+      powerpc)
+            # see comment about AmigaOS4 .so support
+            _LT_TAGVAR(archive_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib'
+            _LT_TAGVAR(archive_expsym_cmds, $1)=''
+        ;;
+      m68k)
+            _LT_TAGVAR(archive_cmds, $1)='$RM $output_objdir/a2ixlibrary.data~$ECHO "#define NAME $libname" > $output_objdir/a2ixlibrary.data~$ECHO "#define LIBRARY_ID 1" >> $output_objdir/a2ixlibrary.data~$ECHO "#define VERSION $major" >> $output_objdir/a2ixlibrary.data~$ECHO "#define REVISION $revision" >> $output_objdir/a2ixlibrary.data~$AR $AR_FLAGS $lib $libobjs~$RANLIB $lib~(cd $output_objdir && a2ixlibrary -32)'
+            _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir'
+            _LT_TAGVAR(hardcode_minus_L, $1)=yes
+        ;;
+      esac
+      ;;
+
+    beos*)
+      if $LD --help 2>&1 | $GREP ': supported targets:.* elf' > /dev/null; then
+	_LT_TAGVAR(allow_undefined_flag, $1)=unsupported
+	# Joseph Beckenbach <jrb3@best.com> says some releases of gcc
+	# support --undefined.  This deserves some investigation.  FIXME
+	_LT_TAGVAR(archive_cmds, $1)='$CC -nostart $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib'
+      else
+	_LT_TAGVAR(ld_shlibs, $1)=no
+      fi
+      ;;
+
+    cygwin* | mingw* | pw32* | cegcc*)
+      # _LT_TAGVAR(hardcode_libdir_flag_spec, $1) is actually meaningless,
+      # as there is no search path for DLLs.
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir'
+      _LT_TAGVAR(export_dynamic_flag_spec, $1)='$wl--export-all-symbols'
+      _LT_TAGVAR(allow_undefined_flag, $1)=unsupported
+      _LT_TAGVAR(always_export_symbols, $1)=no
+      _LT_TAGVAR(enable_shared_with_static_runtimes, $1)=yes
+      _LT_TAGVAR(export_symbols_cmds, $1)='$NM $libobjs $convenience | $global_symbol_pipe | $SED -e '\''/^[[BCDGRS]][[ ]]/s/.*[[ ]]\([[^ ]]*\)/\1 DATA/;s/^.*[[ ]]__nm__\([[^ ]]*\)[[ ]][[^ ]]*/\1 DATA/;/^I[[ ]]/d;/^[[AITW]][[ ]]/s/.* //'\'' | sort | uniq > $export_symbols'
+      _LT_TAGVAR(exclude_expsyms, $1)=['[_]+GLOBAL_OFFSET_TABLE_|[_]+GLOBAL__[FID]_.*|[_]+head_[A-Za-z0-9_]+_dll|[A-Za-z0-9_]+_dll_iname']
+
+      if $LD --help 2>&1 | $GREP 'auto-import' > /dev/null; then
+        _LT_TAGVAR(archive_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags -o $output_objdir/$soname $wl--enable-auto-image-base -Xlinker --out-implib -Xlinker $lib'
+	# If the export-symbols file already is a .def file, use it as
+	# is; otherwise, prepend EXPORTS...
+	_LT_TAGVAR(archive_expsym_cmds, $1)='if _LT_DLL_DEF_P([$export_symbols]); then
+          cp $export_symbols $output_objdir/$soname.def;
+        else
+          echo EXPORTS > $output_objdir/$soname.def;
+          cat $export_symbols >> $output_objdir/$soname.def;
+        fi~
+        $CC -shared $output_objdir/$soname.def $libobjs $deplibs $compiler_flags -o $output_objdir/$soname $wl--enable-auto-image-base -Xlinker --out-implib -Xlinker $lib'
+      else
+	_LT_TAGVAR(ld_shlibs, $1)=no
+      fi
+      ;;
+
+    haiku*)
+      _LT_TAGVAR(archive_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib'
+      _LT_TAGVAR(link_all_deplibs, $1)=yes
+      ;;
+
+    os2*)
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir'
+      _LT_TAGVAR(hardcode_minus_L, $1)=yes
+      _LT_TAGVAR(allow_undefined_flag, $1)=unsupported
+      shrext_cmds=.dll
+      _LT_TAGVAR(archive_cmds, $1)='$ECHO "LIBRARY ${soname%$shared_ext} INITINSTANCE TERMINSTANCE" > $output_objdir/$libname.def~
+	$ECHO "DESCRIPTION \"$libname\"" >> $output_objdir/$libname.def~
+	$ECHO "DATA MULTIPLE NONSHARED" >> $output_objdir/$libname.def~
+	$ECHO EXPORTS >> $output_objdir/$libname.def~
+	emxexp $libobjs | $SED /"_DLL_InitTerm"/d >> $output_objdir/$libname.def~
+	$CC -Zdll -Zcrtdll -o $output_objdir/$soname $libobjs $deplibs $compiler_flags $output_objdir/$libname.def~
+	emximp -o $lib $output_objdir/$libname.def'
+      _LT_TAGVAR(archive_expsym_cmds, $1)='$ECHO "LIBRARY ${soname%$shared_ext} INITINSTANCE TERMINSTANCE" > $output_objdir/$libname.def~
+	$ECHO "DESCRIPTION \"$libname\"" >> $output_objdir/$libname.def~
+	$ECHO "DATA MULTIPLE NONSHARED" >> $output_objdir/$libname.def~
+	$ECHO EXPORTS >> $output_objdir/$libname.def~
+	prefix_cmds="$SED"~
+	if test EXPORTS = "`$SED 1q $export_symbols`"; then
+	  prefix_cmds="$prefix_cmds -e 1d";
+	fi~
+	prefix_cmds="$prefix_cmds -e \"s/^\(.*\)$/_\1/g\""~
+	cat $export_symbols | $prefix_cmds >> $output_objdir/$libname.def~
+	$CC -Zdll -Zcrtdll -o $output_objdir/$soname $libobjs $deplibs $compiler_flags $output_objdir/$libname.def~
+	emximp -o $lib $output_objdir/$libname.def'
+      _LT_TAGVAR(old_archive_From_new_cmds, $1)='emximp -o $output_objdir/${libname}_dll.a $output_objdir/$libname.def'
+      _LT_TAGVAR(enable_shared_with_static_runtimes, $1)=yes
+      ;;
+
+    interix[[3-9]]*)
+      _LT_TAGVAR(hardcode_direct, $1)=no
+      _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-rpath,$libdir'
+      _LT_TAGVAR(export_dynamic_flag_spec, $1)='$wl-E'
+      # Hack: On Interix 3.x, we cannot compile PIC because of a broken gcc.
+      # Instead, shared libraries are loaded at an image base (0x10000000 by
+      # default) and relocated if they conflict, which is a slow very memory
+      # consuming and fragmenting process.  To avoid this, we pick a random,
+      # 256 KiB-aligned image base between 0x50000000 and 0x6FFC0000 at link
+      # time.  Moving up from 0x10000000 also allows more sbrk(2) space.
+      _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-h,$soname $wl--image-base,`expr ${RANDOM-$$} % 4096 / 2 \* 262144 + 1342177280` -o $lib'
+      _LT_TAGVAR(archive_expsym_cmds, $1)='sed "s|^|_|" $export_symbols >$output_objdir/$soname.expsym~$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-h,$soname $wl--retain-symbols-file,$output_objdir/$soname.expsym $wl--image-base,`expr ${RANDOM-$$} % 4096 / 2 \* 262144 + 1342177280` -o $lib'
+      ;;
+
+    gnu* | linux* | tpf* | k*bsd*-gnu | kopensolaris*-gnu)
+      tmp_diet=no
+      if test linux-dietlibc = "$host_os"; then
+	case $cc_basename in
+	  diet\ *) tmp_diet=yes;;	# linux-dietlibc with static linking (!diet-dyn)
+	esac
+      fi
+      if $LD --help 2>&1 | $EGREP ': supported targets:.* elf' > /dev/null \
+	 && test no = "$tmp_diet"
+      then
+	tmp_addflag=' $pic_flag'
+	tmp_sharedflag='-shared'
+	case $cc_basename,$host_cpu in
+        pgcc*)				# Portland Group C compiler
+	  _LT_TAGVAR(whole_archive_flag_spec, $1)='$wl--whole-archive`for conv in $convenience\"\"; do test  -n \"$conv\" && new_convenience=\"$new_convenience,$conv\"; done; func_echo_all \"$new_convenience\"` $wl--no-whole-archive'
+	  tmp_addflag=' $pic_flag'
+	  ;;
+	pgf77* | pgf90* | pgf95* | pgfortran*)
+					# Portland Group f77 and f90 compilers
+	  _LT_TAGVAR(whole_archive_flag_spec, $1)='$wl--whole-archive`for conv in $convenience\"\"; do test  -n \"$conv\" && new_convenience=\"$new_convenience,$conv\"; done; func_echo_all \"$new_convenience\"` $wl--no-whole-archive'
+	  tmp_addflag=' $pic_flag -Mnomain' ;;
+	ecc*,ia64* | icc*,ia64*)	# Intel C compiler on ia64
+	  tmp_addflag=' -i_dynamic' ;;
+	efc*,ia64* | ifort*,ia64*)	# Intel Fortran compiler on ia64
+	  tmp_addflag=' -i_dynamic -nofor_main' ;;
+	ifc* | ifort*)			# Intel Fortran compiler
+	  tmp_addflag=' -nofor_main' ;;
+	lf95*)				# Lahey Fortran 8.1
+	  _LT_TAGVAR(whole_archive_flag_spec, $1)=
+	  tmp_sharedflag='--shared' ;;
+        nagfor*)                        # NAGFOR 5.3
+          tmp_sharedflag='-Wl,-shared' ;;
+	xl[[cC]]* | bgxl[[cC]]* | mpixl[[cC]]*) # IBM XL C 8.0 on PPC (deal with xlf below)
+	  tmp_sharedflag='-qmkshrobj'
+	  tmp_addflag= ;;
+	nvcc*)	# Cuda Compiler Driver 2.2
+	  _LT_TAGVAR(whole_archive_flag_spec, $1)='$wl--whole-archive`for conv in $convenience\"\"; do test  -n \"$conv\" && new_convenience=\"$new_convenience,$conv\"; done; func_echo_all \"$new_convenience\"` $wl--no-whole-archive'
+	  _LT_TAGVAR(compiler_needs_object, $1)=yes
+	  ;;
+	esac
+	case `$CC -V 2>&1 | sed 5q` in
+	*Sun\ C*)			# Sun C 5.9
+	  _LT_TAGVAR(whole_archive_flag_spec, $1)='$wl--whole-archive`new_convenience=; for conv in $convenience\"\"; do test -z \"$conv\" || new_convenience=\"$new_convenience,$conv\"; done; func_echo_all \"$new_convenience\"` $wl--no-whole-archive'
+	  _LT_TAGVAR(compiler_needs_object, $1)=yes
+	  tmp_sharedflag='-G' ;;
+	*Sun\ F*)			# Sun Fortran 8.3
+	  tmp_sharedflag='-G' ;;
+	esac
+	_LT_TAGVAR(archive_cmds, $1)='$CC '"$tmp_sharedflag""$tmp_addflag"' $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib'
+
+        if test yes = "$supports_anon_versioning"; then
+          _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $output_objdir/$libname.ver~
+            cat $export_symbols | sed -e "s/\(.*\)/\1;/" >> $output_objdir/$libname.ver~
+            echo "local: *; };" >> $output_objdir/$libname.ver~
+            $CC '"$tmp_sharedflag""$tmp_addflag"' $libobjs $deplibs $compiler_flags $wl-soname $wl$soname $wl-version-script $wl$output_objdir/$libname.ver -o $lib'
+        fi
+
+	case $cc_basename in
+	tcc*)
+	  _LT_TAGVAR(export_dynamic_flag_spec, $1)='-rdynamic'
+	  ;;
+	xlf* | bgf* | bgxlf* | mpixlf*)
+	  # IBM XL Fortran 10.1 on PPC cannot create shared libs itself
+	  _LT_TAGVAR(whole_archive_flag_spec, $1)='--whole-archive$convenience --no-whole-archive'
+	  _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-rpath $wl$libdir'
+	  _LT_TAGVAR(archive_cmds, $1)='$LD -shared $libobjs $deplibs $linker_flags -soname $soname -o $lib'
+	  if test yes = "$supports_anon_versioning"; then
+	    _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $output_objdir/$libname.ver~
+              cat $export_symbols | sed -e "s/\(.*\)/\1;/" >> $output_objdir/$libname.ver~
+              echo "local: *; };" >> $output_objdir/$libname.ver~
+              $LD -shared $libobjs $deplibs $linker_flags -soname $soname -version-script $output_objdir/$libname.ver -o $lib'
+	  fi
+	  ;;
+	esac
+      else
+        _LT_TAGVAR(ld_shlibs, $1)=no
+      fi
+      ;;
+
+    netbsd* | netbsdelf*-gnu)
+      if echo __ELF__ | $CC -E - | $GREP __ELF__ >/dev/null; then
+	_LT_TAGVAR(archive_cmds, $1)='$LD -Bshareable $libobjs $deplibs $linker_flags -o $lib'
+	wlarc=
+      else
+	_LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib'
+	_LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname $wl-retain-symbols-file $wl$export_symbols -o $lib'
+      fi
+      ;;
+
+    solaris*)
+      if $LD -v 2>&1 | $GREP 'BFD 2\.8' > /dev/null; then
+	_LT_TAGVAR(ld_shlibs, $1)=no
+	cat <<_LT_EOF 1>&2
+
+*** Warning: The releases 2.8.* of the GNU linker cannot reliably
+*** create shared libraries on Solaris systems.  Therefore, libtool
+*** is disabling shared libraries support.  We urge you to upgrade GNU
+*** binutils to release 2.9.1 or newer.  Another option is to modify
+*** your PATH or compiler configuration so that the native linker is
+*** used, and then restart.
+
+_LT_EOF
+      elif $LD --help 2>&1 | $GREP ': supported targets:.* elf' > /dev/null; then
+	_LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib'
+	_LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname $wl-retain-symbols-file $wl$export_symbols -o $lib'
+      else
+	_LT_TAGVAR(ld_shlibs, $1)=no
+      fi
+      ;;
+
+    sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX*)
+      case `$LD -v 2>&1` in
+        *\ [[01]].* | *\ 2.[[0-9]].* | *\ 2.1[[0-5]].*)
+	_LT_TAGVAR(ld_shlibs, $1)=no
+	cat <<_LT_EOF 1>&2
+
+*** Warning: Releases of the GNU linker prior to 2.16.91.0.3 cannot
+*** reliably create shared libraries on SCO systems.  Therefore, libtool
+*** is disabling shared libraries support.  We urge you to upgrade GNU
+*** binutils to release 2.16.91.0.3 or newer.  Another option is to modify
+*** your PATH or compiler configuration so that the native linker is
+*** used, and then restart.
+
+_LT_EOF
+	;;
+	*)
+	  # For security reasons, it is highly recommended that you always
+	  # use absolute paths for naming shared libraries, and exclude the
+	  # DT_RUNPATH tag from executables and libraries.  But doing so
+	  # requires that you compile everything twice, which is a pain.
+	  if $LD --help 2>&1 | $GREP ': supported targets:.* elf' > /dev/null; then
+	    _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-rpath $wl$libdir'
+	    _LT_TAGVAR(archive_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib'
+	    _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags $wl-soname $wl$soname $wl-retain-symbols-file $wl$export_symbols -o $lib'
+	  else
+	    _LT_TAGVAR(ld_shlibs, $1)=no
+	  fi
+	;;
+      esac
+      ;;
+
+    sunos4*)
+      _LT_TAGVAR(archive_cmds, $1)='$LD -assert pure-text -Bshareable -o $lib $libobjs $deplibs $linker_flags'
+      wlarc=
+      _LT_TAGVAR(hardcode_direct, $1)=yes
+      _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+      ;;
+
+    *)
+      if $LD --help 2>&1 | $GREP ': supported targets:.* elf' > /dev/null; then
+	_LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib'
+	_LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname $wl-retain-symbols-file $wl$export_symbols -o $lib'
+      else
+	_LT_TAGVAR(ld_shlibs, $1)=no
+      fi
+      ;;
+    esac
+
+    if test no = "$_LT_TAGVAR(ld_shlibs, $1)"; then
+      runpath_var=
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)=
+      _LT_TAGVAR(export_dynamic_flag_spec, $1)=
+      _LT_TAGVAR(whole_archive_flag_spec, $1)=
+    fi
+  else
+    # PORTME fill in a description of your system's linker (not GNU ld)
+    case $host_os in
+    aix3*)
+      _LT_TAGVAR(allow_undefined_flag, $1)=unsupported
+      _LT_TAGVAR(always_export_symbols, $1)=yes
+      _LT_TAGVAR(archive_expsym_cmds, $1)='$LD -o $output_objdir/$soname $libobjs $deplibs $linker_flags -bE:$export_symbols -T512 -H512 -bM:SRE~$AR $AR_FLAGS $lib $output_objdir/$soname'
+      # Note: this linker hardcodes the directories in LIBPATH if there
+      # are no directories specified by -L.
+      _LT_TAGVAR(hardcode_minus_L, $1)=yes
+      if test yes = "$GCC" && test -z "$lt_prog_compiler_static"; then
+	# Neither direct hardcoding nor static linking is supported with a
+	# broken collect2.
+	_LT_TAGVAR(hardcode_direct, $1)=unsupported
+      fi
+      ;;
+
+    aix[[4-9]]*)
+      if test ia64 = "$host_cpu"; then
+	# On IA64, the linker does run time linking by default, so we don't
+	# have to do anything special.
+	aix_use_runtimelinking=no
+	exp_sym_flag='-Bexport'
+	no_entry_flag=
+      else
+	# If we're using GNU nm, then we don't want the "-C" option.
+	# -C means demangle to GNU nm, but means don't demangle to AIX nm.
+	# Without the "-l" option, or with the "-B" option, AIX nm treats
+	# weak defined symbols like other global defined symbols, whereas
+	# GNU nm marks them as "W".
+	# While the 'weak' keyword is ignored in the Export File, we need
+	# it in the Import File for the 'aix-soname' feature, so we have
+	# to replace the "-B" option with "-P" for AIX nm.
+	if $NM -V 2>&1 | $GREP 'GNU' > /dev/null; then
+	  _LT_TAGVAR(export_symbols_cmds, $1)='$NM -Bpg $libobjs $convenience | awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B") || (\$ 2 == "W")) && ([substr](\$ 3,1,1) != ".")) { if (\$ 2 == "W") { print \$ 3 " weak" } else { print \$ 3 } } }'\'' | sort -u > $export_symbols'
+	else
+	  _LT_TAGVAR(export_symbols_cmds, $1)='`func_echo_all $NM | $SED -e '\''s/B\([[^B]]*\)$/P\1/'\''` -PCpgl $libobjs $convenience | awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B") || (\$ 2 == "W") || (\$ 2 == "V") || (\$ 2 == "Z")) && ([substr](\$ 1,1,1) != ".")) { if ((\$ 2 == "W") || (\$ 2 == "V") || (\$ 2 == "Z")) { print \$ 1 " weak" } else { print \$ 1 } } }'\'' | sort -u > $export_symbols'
+	fi
+	aix_use_runtimelinking=no
+
+	# Test if we are trying to use run time linking or normal
+	# AIX style linking. If -brtl is somewhere in LDFLAGS, we
+	# have runtime linking enabled, and use it for executables.
+	# For shared libraries, we enable/disable runtime linking
+	# depending on the kind of the shared library created -
+	# when "with_aix_soname,aix_use_runtimelinking" is:
+	# "aix,no"   lib.a(lib.so.V) shared, rtl:no,  for executables
+	# "aix,yes"  lib.so          shared, rtl:yes, for executables
+	#            lib.a           static archive
+	# "both,no"  lib.so.V(shr.o) shared, rtl:yes
+	#            lib.a(lib.so.V) shared, rtl:no,  for executables
+	# "both,yes" lib.so.V(shr.o) shared, rtl:yes, for executables
+	#            lib.a(lib.so.V) shared, rtl:no
+	# "svr4,*"   lib.so.V(shr.o) shared, rtl:yes, for executables
+	#            lib.a           static archive
+	case $host_os in aix4.[[23]]|aix4.[[23]].*|aix[[5-9]]*)
+	  for ld_flag in $LDFLAGS; do
+	  if (test x-brtl = "x$ld_flag" || test x-Wl,-brtl = "x$ld_flag"); then
+	    aix_use_runtimelinking=yes
+	    break
+	  fi
+	  done
+	  if test svr4,no = "$with_aix_soname,$aix_use_runtimelinking"; then
+	    # With aix-soname=svr4, we create the lib.so.V shared archives only,
+	    # so we don't have lib.a shared libs to link our executables.
+	    # We have to force runtime linking in this case.
+	    aix_use_runtimelinking=yes
+	    LDFLAGS="$LDFLAGS -Wl,-brtl"
+	  fi
+	  ;;
+	esac
+
+	exp_sym_flag='-bexport'
+	no_entry_flag='-bnoentry'
+      fi
+
+      # When large executables or shared objects are built, AIX ld can
+      # have problems creating the table of contents.  If linking a library
+      # or program results in "error TOC overflow" add -mminimal-toc to
+      # CXXFLAGS/CFLAGS for g++/gcc.  In the cases where that is not
+      # enough to fix the problem, add -Wl,-bbigtoc to LDFLAGS.
+
+      _LT_TAGVAR(archive_cmds, $1)=''
+      _LT_TAGVAR(hardcode_direct, $1)=yes
+      _LT_TAGVAR(hardcode_direct_absolute, $1)=yes
+      _LT_TAGVAR(hardcode_libdir_separator, $1)=':'
+      _LT_TAGVAR(link_all_deplibs, $1)=yes
+      _LT_TAGVAR(file_list_spec, $1)='$wl-f,'
+      case $with_aix_soname,$aix_use_runtimelinking in
+      aix,*) ;; # traditional, no import file
+      svr4,* | *,yes) # use import file
+	# The Import File defines what to hardcode.
+	_LT_TAGVAR(hardcode_direct, $1)=no
+	_LT_TAGVAR(hardcode_direct_absolute, $1)=no
+	;;
+      esac
+
+      if test yes = "$GCC"; then
+	case $host_os in aix4.[[012]]|aix4.[[012]].*)
+	# We only want to do this on AIX 4.2 and lower, the check
+	# below for broken collect2 doesn't work under 4.3+
+	  collect2name=`$CC -print-prog-name=collect2`
+	  if test -f "$collect2name" &&
+	   strings "$collect2name" | $GREP resolve_lib_name >/dev/null
+	  then
+	  # We have reworked collect2
+	  :
+	  else
+	  # We have old collect2
+	  _LT_TAGVAR(hardcode_direct, $1)=unsupported
+	  # It fails to find uninstalled libraries when the uninstalled
+	  # path is not listed in the libpath.  Setting hardcode_minus_L
+	  # to unsupported forces relinking
+	  _LT_TAGVAR(hardcode_minus_L, $1)=yes
+	  _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir'
+	  _LT_TAGVAR(hardcode_libdir_separator, $1)=
+	  fi
+	  ;;
+	esac
+	shared_flag='-shared'
+	if test yes = "$aix_use_runtimelinking"; then
+	  shared_flag="$shared_flag "'$wl-G'
+	fi
+	# Need to ensure runtime linking is disabled for the traditional
+	# shared library, or the linker may eventually find shared libraries
+	# /with/ Import File - we do not want to mix them.
+	shared_flag_aix='-shared'
+	shared_flag_svr4='-shared $wl-G'
+      else
+	# not using gcc
+	if test ia64 = "$host_cpu"; then
+	# VisualAge C++, Version 5.5 for AIX 5L for IA-64, Beta 3 Release
+	# chokes on -Wl,-G. The following line is correct:
+	  shared_flag='-G'
+	else
+	  if test yes = "$aix_use_runtimelinking"; then
+	    shared_flag='$wl-G'
+	  else
+	    shared_flag='$wl-bM:SRE'
+	  fi
+	  shared_flag_aix='$wl-bM:SRE'
+	  shared_flag_svr4='$wl-G'
+	fi
+      fi
+
+      _LT_TAGVAR(export_dynamic_flag_spec, $1)='$wl-bexpall'
+      # It seems that -bexpall does not export symbols beginning with
+      # underscore (_), so it is better to generate a list of symbols to export.
+      _LT_TAGVAR(always_export_symbols, $1)=yes
+      if test aix,yes = "$with_aix_soname,$aix_use_runtimelinking"; then
+	# Warning - without using the other runtime loading flags (-brtl),
+	# -berok will link without error, but may produce a broken library.
+	_LT_TAGVAR(allow_undefined_flag, $1)='-berok'
+        # Determine the default libpath from the value encoded in an
+        # empty executable.
+        _LT_SYS_MODULE_PATH_AIX([$1])
+        _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-blibpath:$libdir:'"$aix_libpath"
+        _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -o $output_objdir/$soname $libobjs $deplibs $wl'$no_entry_flag' $compiler_flags `if test -n "$allow_undefined_flag"; then func_echo_all "$wl$allow_undefined_flag"; else :; fi` $wl'$exp_sym_flag:\$export_symbols' '$shared_flag
+      else
+	if test ia64 = "$host_cpu"; then
+	  _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-R $libdir:/usr/lib:/lib'
+	  _LT_TAGVAR(allow_undefined_flag, $1)="-z nodefs"
+	  _LT_TAGVAR(archive_expsym_cmds, $1)="\$CC $shared_flag"' -o $output_objdir/$soname $libobjs $deplibs '"\$wl$no_entry_flag"' $compiler_flags $wl$allow_undefined_flag '"\$wl$exp_sym_flag:\$export_symbols"
+	else
+	 # Determine the default libpath from the value encoded in an
+	 # empty executable.
+	 _LT_SYS_MODULE_PATH_AIX([$1])
+	 _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-blibpath:$libdir:'"$aix_libpath"
+	  # Warning - without using the other run time loading flags,
+	  # -berok will link without error, but may produce a broken library.
+	  _LT_TAGVAR(no_undefined_flag, $1)=' $wl-bernotok'
+	  _LT_TAGVAR(allow_undefined_flag, $1)=' $wl-berok'
+	  if test yes = "$with_gnu_ld"; then
+	    # We only use this code for GNU lds that support --whole-archive.
+	    _LT_TAGVAR(whole_archive_flag_spec, $1)='$wl--whole-archive$convenience $wl--no-whole-archive'
+	  else
+	    # Exported symbols can be pulled into shared objects from archives
+	    _LT_TAGVAR(whole_archive_flag_spec, $1)='$convenience'
+	  fi
+	  _LT_TAGVAR(archive_cmds_need_lc, $1)=yes
+	  _LT_TAGVAR(archive_expsym_cmds, $1)='$RM -r $output_objdir/$realname.d~$MKDIR $output_objdir/$realname.d'
+	  # -brtl affects multiple linker settings, -berok does not and is overridden later
+	  compiler_flags_filtered='`func_echo_all "$compiler_flags " | $SED -e "s%-brtl\\([[, ]]\\)%-berok\\1%g"`'
+	  if test svr4 != "$with_aix_soname"; then
+	    # This is similar to how AIX traditionally builds its shared libraries.
+	    _LT_TAGVAR(archive_expsym_cmds, $1)="$_LT_TAGVAR(archive_expsym_cmds, $1)"'~$CC '$shared_flag_aix' -o $output_objdir/$realname.d/$soname $libobjs $deplibs $wl-bnoentry '$compiler_flags_filtered'$wl-bE:$export_symbols$allow_undefined_flag~$AR $AR_FLAGS $output_objdir/$libname$release.a $output_objdir/$realname.d/$soname'
+	  fi
+	  if test aix != "$with_aix_soname"; then
+	    _LT_TAGVAR(archive_expsym_cmds, $1)="$_LT_TAGVAR(archive_expsym_cmds, $1)"'~$CC '$shared_flag_svr4' -o $output_objdir/$realname.d/$shared_archive_member_spec.o $libobjs $deplibs $wl-bnoentry '$compiler_flags_filtered'$wl-bE:$export_symbols$allow_undefined_flag~$STRIP -e $output_objdir/$realname.d/$shared_archive_member_spec.o~( func_echo_all "#! $soname($shared_archive_member_spec.o)"; if test shr_64 = "$shared_archive_member_spec"; then func_echo_all "# 64"; else func_echo_all "# 32"; fi; cat $export_symbols ) > $output_objdir/$realname.d/$shared_archive_member_spec.imp~$AR $AR_FLAGS $output_objdir/$soname $output_objdir/$realname.d/$shared_archive_member_spec.o $output_objdir/$realname.d/$shared_archive_member_spec.imp'
+	  else
+	    # used by -dlpreopen to get the symbols
+	    _LT_TAGVAR(archive_expsym_cmds, $1)="$_LT_TAGVAR(archive_expsym_cmds, $1)"'~$MV  $output_objdir/$realname.d/$soname $output_objdir'
+	  fi
+	  _LT_TAGVAR(archive_expsym_cmds, $1)="$_LT_TAGVAR(archive_expsym_cmds, $1)"'~$RM -r $output_objdir/$realname.d'
+	fi
+      fi
+      ;;
+
+    amigaos*)
+      case $host_cpu in
+      powerpc)
+            # see comment about AmigaOS4 .so support
+            _LT_TAGVAR(archive_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib'
+            _LT_TAGVAR(archive_expsym_cmds, $1)=''
+        ;;
+      m68k)
+            _LT_TAGVAR(archive_cmds, $1)='$RM $output_objdir/a2ixlibrary.data~$ECHO "#define NAME $libname" > $output_objdir/a2ixlibrary.data~$ECHO "#define LIBRARY_ID 1" >> $output_objdir/a2ixlibrary.data~$ECHO "#define VERSION $major" >> $output_objdir/a2ixlibrary.data~$ECHO "#define REVISION $revision" >> $output_objdir/a2ixlibrary.data~$AR $AR_FLAGS $lib $libobjs~$RANLIB $lib~(cd $output_objdir && a2ixlibrary -32)'
+            _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir'
+            _LT_TAGVAR(hardcode_minus_L, $1)=yes
+        ;;
+      esac
+      ;;
+
+    bsdi[[45]]*)
+      _LT_TAGVAR(export_dynamic_flag_spec, $1)=-rdynamic
+      ;;
+
+    cygwin* | mingw* | pw32* | cegcc*)
+      # When not using gcc, we currently assume that we are using
+      # Microsoft Visual C++.
+      # hardcode_libdir_flag_spec is actually meaningless, as there is
+      # no search path for DLLs.
+      case $cc_basename in
+      cl*)
+	# Native MSVC
+	_LT_TAGVAR(hardcode_libdir_flag_spec, $1)=' '
+	_LT_TAGVAR(allow_undefined_flag, $1)=unsupported
+	_LT_TAGVAR(always_export_symbols, $1)=yes
+	_LT_TAGVAR(file_list_spec, $1)='@'
+	# Tell ltmain to make .lib files, not .a files.
+	libext=lib
+	# Tell ltmain to make .dll files, not .so files.
+	shrext_cmds=.dll
+	# FIXME: Setting linknames here is a bad hack.
+	_LT_TAGVAR(archive_cmds, $1)='$CC -o $output_objdir/$soname $libobjs $compiler_flags $deplibs -Wl,-DLL,-IMPLIB:"$tool_output_objdir$libname.dll.lib"~linknames='
+	_LT_TAGVAR(archive_expsym_cmds, $1)='if _LT_DLL_DEF_P([$export_symbols]); then
+            cp "$export_symbols" "$output_objdir/$soname.def";
+            echo "$tool_output_objdir$soname.def" > "$output_objdir/$soname.exp";
+          else
+            $SED -e '\''s/^/-link -EXPORT:/'\'' < $export_symbols > $output_objdir/$soname.exp;
+          fi~
+          $CC -o $tool_output_objdir$soname $libobjs $compiler_flags $deplibs "@$tool_output_objdir$soname.exp" -Wl,-DLL,-IMPLIB:"$tool_output_objdir$libname.dll.lib"~
+          linknames='
+	# The linker will not automatically build a static lib if we build a DLL.
+	# _LT_TAGVAR(old_archive_from_new_cmds, $1)='true'
+	_LT_TAGVAR(enable_shared_with_static_runtimes, $1)=yes
+	_LT_TAGVAR(exclude_expsyms, $1)='_NULL_IMPORT_DESCRIPTOR|_IMPORT_DESCRIPTOR_.*'
+	_LT_TAGVAR(export_symbols_cmds, $1)='$NM $libobjs $convenience | $global_symbol_pipe | $SED -e '\''/^[[BCDGRS]][[ ]]/s/.*[[ ]]\([[^ ]]*\)/\1,DATA/'\'' | $SED -e '\''/^[[AITW]][[ ]]/s/.*[[ ]]//'\'' | sort | uniq > $export_symbols'
+	# Don't use ranlib
+	_LT_TAGVAR(old_postinstall_cmds, $1)='chmod 644 $oldlib'
+	_LT_TAGVAR(postlink_cmds, $1)='lt_outputfile="@OUTPUT@"~
+          lt_tool_outputfile="@TOOL_OUTPUT@"~
+          case $lt_outputfile in
+            *.exe|*.EXE) ;;
+            *)
+              lt_outputfile=$lt_outputfile.exe
+              lt_tool_outputfile=$lt_tool_outputfile.exe
+              ;;
+          esac~
+          if test : != "$MANIFEST_TOOL" && test -f "$lt_outputfile.manifest"; then
+            $MANIFEST_TOOL -manifest "$lt_tool_outputfile.manifest" -outputresource:"$lt_tool_outputfile" || exit 1;
+            $RM "$lt_outputfile.manifest";
+          fi'
+	;;
+      *)
+	# Assume MSVC wrapper
+	_LT_TAGVAR(hardcode_libdir_flag_spec, $1)=' '
+	_LT_TAGVAR(allow_undefined_flag, $1)=unsupported
+	# Tell ltmain to make .lib files, not .a files.
+	libext=lib
+	# Tell ltmain to make .dll files, not .so files.
+	shrext_cmds=.dll
+	# FIXME: Setting linknames here is a bad hack.
+	_LT_TAGVAR(archive_cmds, $1)='$CC -o $lib $libobjs $compiler_flags `func_echo_all "$deplibs" | $SED '\''s/ -lc$//'\''` -link -dll~linknames='
+	# The linker will automatically build a .lib file if we build a DLL.
+	_LT_TAGVAR(old_archive_from_new_cmds, $1)='true'
+	# FIXME: Should let the user specify the lib program.
+	_LT_TAGVAR(old_archive_cmds, $1)='lib -OUT:$oldlib$oldobjs$old_deplibs'
+	_LT_TAGVAR(enable_shared_with_static_runtimes, $1)=yes
+	;;
+      esac
+      ;;
+
+    darwin* | rhapsody*)
+      _LT_DARWIN_LINKER_FEATURES($1)
+      ;;
+
+    dgux*)
+      _LT_TAGVAR(archive_cmds, $1)='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir'
+      _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+      ;;
+
+    # FreeBSD 2.2.[012] allows us to include c++rt0.o to get C++ constructor
+    # support.  Future versions do this automatically, but an explicit c++rt0.o
+    # does not break anything, and helps significantly (at the cost of a little
+    # extra space).
+    freebsd2.2*)
+      _LT_TAGVAR(archive_cmds, $1)='$LD -Bshareable -o $lib $libobjs $deplibs $linker_flags /usr/lib/c++rt0.o'
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-R$libdir'
+      _LT_TAGVAR(hardcode_direct, $1)=yes
+      _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+      ;;
+
+    # Unfortunately, older versions of FreeBSD 2 do not have this feature.
+    freebsd2.*)
+      _LT_TAGVAR(archive_cmds, $1)='$LD -Bshareable -o $lib $libobjs $deplibs $linker_flags'
+      _LT_TAGVAR(hardcode_direct, $1)=yes
+      _LT_TAGVAR(hardcode_minus_L, $1)=yes
+      _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+      ;;
+
+    # FreeBSD 3 and greater uses gcc -shared to do shared libraries.
+    freebsd* | dragonfly*)
+      _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag -o $lib $libobjs $deplibs $compiler_flags'
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-R$libdir'
+      _LT_TAGVAR(hardcode_direct, $1)=yes
+      _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+      ;;
+
+    hpux9*)
+      if test yes = "$GCC"; then
+	_LT_TAGVAR(archive_cmds, $1)='$RM $output_objdir/$soname~$CC -shared $pic_flag $wl+b $wl$install_libdir -o $output_objdir/$soname $libobjs $deplibs $compiler_flags~test "x$output_objdir/$soname" = "x$lib" || mv $output_objdir/$soname $lib'
+      else
+	_LT_TAGVAR(archive_cmds, $1)='$RM $output_objdir/$soname~$LD -b +b $install_libdir -o $output_objdir/$soname $libobjs $deplibs $linker_flags~test "x$output_objdir/$soname" = "x$lib" || mv $output_objdir/$soname $lib'
+      fi
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl+b $wl$libdir'
+      _LT_TAGVAR(hardcode_libdir_separator, $1)=:
+      _LT_TAGVAR(hardcode_direct, $1)=yes
+
+      # hardcode_minus_L: Not really in the search PATH,
+      # but as the default location of the library.
+      _LT_TAGVAR(hardcode_minus_L, $1)=yes
+      _LT_TAGVAR(export_dynamic_flag_spec, $1)='$wl-E'
+      ;;
+
+    hpux10*)
+      if test yes,no = "$GCC,$with_gnu_ld"; then
+	_LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag $wl+h $wl$soname $wl+b $wl$install_libdir -o $lib $libobjs $deplibs $compiler_flags'
+      else
+	_LT_TAGVAR(archive_cmds, $1)='$LD -b +h $soname +b $install_libdir -o $lib $libobjs $deplibs $linker_flags'
+      fi
+      if test no = "$with_gnu_ld"; then
+	_LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl+b $wl$libdir'
+	_LT_TAGVAR(hardcode_libdir_separator, $1)=:
+	_LT_TAGVAR(hardcode_direct, $1)=yes
+	_LT_TAGVAR(hardcode_direct_absolute, $1)=yes
+	_LT_TAGVAR(export_dynamic_flag_spec, $1)='$wl-E'
+	# hardcode_minus_L: Not really in the search PATH,
+	# but as the default location of the library.
+	_LT_TAGVAR(hardcode_minus_L, $1)=yes
+      fi
+      ;;
+
+    hpux11*)
+      if test yes,no = "$GCC,$with_gnu_ld"; then
+	case $host_cpu in
+	hppa*64*)
+	  _LT_TAGVAR(archive_cmds, $1)='$CC -shared $wl+h $wl$soname -o $lib $libobjs $deplibs $compiler_flags'
+	  ;;
+	ia64*)
+	  _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag $wl+h $wl$soname $wl+nodefaultrpath -o $lib $libobjs $deplibs $compiler_flags'
+	  ;;
+	*)
+	  _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag $wl+h $wl$soname $wl+b $wl$install_libdir -o $lib $libobjs $deplibs $compiler_flags'
+	  ;;
+	esac
+      else
+	case $host_cpu in
+	hppa*64*)
+	  _LT_TAGVAR(archive_cmds, $1)='$CC -b $wl+h $wl$soname -o $lib $libobjs $deplibs $compiler_flags'
+	  ;;
+	ia64*)
+	  _LT_TAGVAR(archive_cmds, $1)='$CC -b $wl+h $wl$soname $wl+nodefaultrpath -o $lib $libobjs $deplibs $compiler_flags'
+	  ;;
+	*)
+	m4_if($1, [], [
+	  # Older versions of the 11.00 compiler do not understand -b yet
+	  # (HP92453-01 A.11.01.20 doesn't, HP92453-01 B.11.X.35175-35176.GP does)
+	  _LT_LINKER_OPTION([if $CC understands -b],
+	    _LT_TAGVAR(lt_cv_prog_compiler__b, $1), [-b],
+	    [_LT_TAGVAR(archive_cmds, $1)='$CC -b $wl+h $wl$soname $wl+b $wl$install_libdir -o $lib $libobjs $deplibs $compiler_flags'],
+	    [_LT_TAGVAR(archive_cmds, $1)='$LD -b +h $soname +b $install_libdir -o $lib $libobjs $deplibs $linker_flags'])],
+	  [_LT_TAGVAR(archive_cmds, $1)='$CC -b $wl+h $wl$soname $wl+b $wl$install_libdir -o $lib $libobjs $deplibs $compiler_flags'])
+	  ;;
+	esac
+      fi
+      if test no = "$with_gnu_ld"; then
+	_LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl+b $wl$libdir'
+	_LT_TAGVAR(hardcode_libdir_separator, $1)=:
+
+	case $host_cpu in
+	hppa*64*|ia64*)
+	  _LT_TAGVAR(hardcode_direct, $1)=no
+	  _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+	  ;;
+	*)
+	  _LT_TAGVAR(hardcode_direct, $1)=yes
+	  _LT_TAGVAR(hardcode_direct_absolute, $1)=yes
+	  _LT_TAGVAR(export_dynamic_flag_spec, $1)='$wl-E'
+
+	  # hardcode_minus_L: Not really in the search PATH,
+	  # but as the default location of the library.
+	  _LT_TAGVAR(hardcode_minus_L, $1)=yes
+	  ;;
+	esac
+      fi
+      ;;
+
+    irix5* | irix6* | nonstopux*)
+      if test yes = "$GCC"; then
+	_LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname `test -n "$verstring" && func_echo_all "$wl-set_version $wl$verstring"` $wl-update_registry $wl$output_objdir/so_locations -o $lib'
+	# Try to use the -exported_symbol ld option, if it does not
+	# work, assume that -exports_file does not work either and
+	# implicitly export all symbols.
+	# This should be the same for all languages, so no per-tag cache variable.
+	AC_CACHE_CHECK([whether the $host_os linker accepts -exported_symbol],
+	  [lt_cv_irix_exported_symbol],
+	  [save_LDFLAGS=$LDFLAGS
+	   LDFLAGS="$LDFLAGS -shared $wl-exported_symbol ${wl}foo $wl-update_registry $wl/dev/null"
+	   AC_LINK_IFELSE(
+	     [AC_LANG_SOURCE(
+	        [AC_LANG_CASE([C], [[int foo (void) { return 0; }]],
+			      [C++], [[int foo (void) { return 0; }]],
+			      [Fortran 77], [[
+      subroutine foo
+      end]],
+			      [Fortran], [[
+      subroutine foo
+      end]])])],
+	      [lt_cv_irix_exported_symbol=yes],
+	      [lt_cv_irix_exported_symbol=no])
+           LDFLAGS=$save_LDFLAGS])
+	if test yes = "$lt_cv_irix_exported_symbol"; then
+          _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname `test -n "$verstring" && func_echo_all "$wl-set_version $wl$verstring"` $wl-update_registry $wl$output_objdir/so_locations $wl-exports_file $wl$export_symbols -o $lib'
+	fi
+	_LT_TAGVAR(link_all_deplibs, $1)=no
+      else
+	_LT_TAGVAR(archive_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags -soname $soname `test -n "$verstring" && func_echo_all "-set_version $verstring"` -update_registry $output_objdir/so_locations -o $lib'
+	_LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags -soname $soname `test -n "$verstring" && func_echo_all "-set_version $verstring"` -update_registry $output_objdir/so_locations -exports_file $export_symbols -o $lib'
+      fi
+      _LT_TAGVAR(archive_cmds_need_lc, $1)='no'
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-rpath $wl$libdir'
+      _LT_TAGVAR(hardcode_libdir_separator, $1)=:
+      _LT_TAGVAR(inherit_rpath, $1)=yes
+      _LT_TAGVAR(link_all_deplibs, $1)=yes
+      ;;
+
+    linux*)
+      case $cc_basename in
+      tcc*)
+	# Fabrice Bellard et al's Tiny C Compiler
+	_LT_TAGVAR(ld_shlibs, $1)=yes
+	_LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag -o $lib $libobjs $deplibs $compiler_flags'
+	;;
+      esac
+      ;;
+
+    netbsd* | netbsdelf*-gnu)
+      if echo __ELF__ | $CC -E - | $GREP __ELF__ >/dev/null; then
+	_LT_TAGVAR(archive_cmds, $1)='$LD -Bshareable -o $lib $libobjs $deplibs $linker_flags'  # a.out
+      else
+	_LT_TAGVAR(archive_cmds, $1)='$LD -shared -o $lib $libobjs $deplibs $linker_flags'      # ELF
+      fi
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-R$libdir'
+      _LT_TAGVAR(hardcode_direct, $1)=yes
+      _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+      ;;
+
+    newsos6)
+      _LT_TAGVAR(archive_cmds, $1)='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+      _LT_TAGVAR(hardcode_direct, $1)=yes
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-rpath $wl$libdir'
+      _LT_TAGVAR(hardcode_libdir_separator, $1)=:
+      _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+      ;;
+
+    *nto* | *qnx*)
+      ;;
+
+    openbsd* | bitrig*)
+      if test -f /usr/libexec/ld.so; then
+	_LT_TAGVAR(hardcode_direct, $1)=yes
+	_LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+	_LT_TAGVAR(hardcode_direct_absolute, $1)=yes
+	if test -z "`echo __ELF__ | $CC -E - | $GREP __ELF__`"; then
+	  _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag -o $lib $libobjs $deplibs $compiler_flags'
+	  _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $pic_flag -o $lib $libobjs $deplibs $compiler_flags $wl-retain-symbols-file,$export_symbols'
+	  _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-rpath,$libdir'
+	  _LT_TAGVAR(export_dynamic_flag_spec, $1)='$wl-E'
+	else
+	  _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag -o $lib $libobjs $deplibs $compiler_flags'
+	  _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-rpath,$libdir'
+	fi
+      else
+	_LT_TAGVAR(ld_shlibs, $1)=no
+      fi
+      ;;
+
+    os2*)
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir'
+      _LT_TAGVAR(hardcode_minus_L, $1)=yes
+      _LT_TAGVAR(allow_undefined_flag, $1)=unsupported
+      shrext_cmds=.dll
+      _LT_TAGVAR(archive_cmds, $1)='$ECHO "LIBRARY ${soname%$shared_ext} INITINSTANCE TERMINSTANCE" > $output_objdir/$libname.def~
+	$ECHO "DESCRIPTION \"$libname\"" >> $output_objdir/$libname.def~
+	$ECHO "DATA MULTIPLE NONSHARED" >> $output_objdir/$libname.def~
+	$ECHO EXPORTS >> $output_objdir/$libname.def~
+	emxexp $libobjs | $SED /"_DLL_InitTerm"/d >> $output_objdir/$libname.def~
+	$CC -Zdll -Zcrtdll -o $output_objdir/$soname $libobjs $deplibs $compiler_flags $output_objdir/$libname.def~
+	emximp -o $lib $output_objdir/$libname.def'
+      _LT_TAGVAR(archive_expsym_cmds, $1)='$ECHO "LIBRARY ${soname%$shared_ext} INITINSTANCE TERMINSTANCE" > $output_objdir/$libname.def~
+	$ECHO "DESCRIPTION \"$libname\"" >> $output_objdir/$libname.def~
+	$ECHO "DATA MULTIPLE NONSHARED" >> $output_objdir/$libname.def~
+	$ECHO EXPORTS >> $output_objdir/$libname.def~
+	prefix_cmds="$SED"~
+	if test EXPORTS = "`$SED 1q $export_symbols`"; then
+	  prefix_cmds="$prefix_cmds -e 1d";
+	fi~
+	prefix_cmds="$prefix_cmds -e \"s/^\(.*\)$/_\1/g\""~
+	cat $export_symbols | $prefix_cmds >> $output_objdir/$libname.def~
+	$CC -Zdll -Zcrtdll -o $output_objdir/$soname $libobjs $deplibs $compiler_flags $output_objdir/$libname.def~
+	emximp -o $lib $output_objdir/$libname.def'
+      _LT_TAGVAR(old_archive_From_new_cmds, $1)='emximp -o $output_objdir/${libname}_dll.a $output_objdir/$libname.def'
+      _LT_TAGVAR(enable_shared_with_static_runtimes, $1)=yes
+      ;;
+
+    osf3*)
+      if test yes = "$GCC"; then
+	_LT_TAGVAR(allow_undefined_flag, $1)=' $wl-expect_unresolved $wl\*'
+	_LT_TAGVAR(archive_cmds, $1)='$CC -shared$allow_undefined_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname `test -n "$verstring" && func_echo_all "$wl-set_version $wl$verstring"` $wl-update_registry $wl$output_objdir/so_locations -o $lib'
+      else
+	_LT_TAGVAR(allow_undefined_flag, $1)=' -expect_unresolved \*'
+	_LT_TAGVAR(archive_cmds, $1)='$CC -shared$allow_undefined_flag $libobjs $deplibs $compiler_flags -soname $soname `test -n "$verstring" && func_echo_all "-set_version $verstring"` -update_registry $output_objdir/so_locations -o $lib'
+      fi
+      _LT_TAGVAR(archive_cmds_need_lc, $1)='no'
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-rpath $wl$libdir'
+      _LT_TAGVAR(hardcode_libdir_separator, $1)=:
+      ;;
+
+    osf4* | osf5*)	# as osf3* with the addition of -msym flag
+      if test yes = "$GCC"; then
+	_LT_TAGVAR(allow_undefined_flag, $1)=' $wl-expect_unresolved $wl\*'
+	_LT_TAGVAR(archive_cmds, $1)='$CC -shared$allow_undefined_flag $pic_flag $libobjs $deplibs $compiler_flags $wl-msym $wl-soname $wl$soname `test -n "$verstring" && func_echo_all "$wl-set_version $wl$verstring"` $wl-update_registry $wl$output_objdir/so_locations -o $lib'
+	_LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-rpath $wl$libdir'
+      else
+	_LT_TAGVAR(allow_undefined_flag, $1)=' -expect_unresolved \*'
+	_LT_TAGVAR(archive_cmds, $1)='$CC -shared$allow_undefined_flag $libobjs $deplibs $compiler_flags -msym -soname $soname `test -n "$verstring" && func_echo_all "-set_version $verstring"` -update_registry $output_objdir/so_locations -o $lib'
+	_LT_TAGVAR(archive_expsym_cmds, $1)='for i in `cat $export_symbols`; do printf "%s %s\\n" -exported_symbol "\$i" >> $lib.exp; done; printf "%s\\n" "-hidden">> $lib.exp~
+          $CC -shared$allow_undefined_flag $wl-input $wl$lib.exp $compiler_flags $libobjs $deplibs -soname $soname `test -n "$verstring" && $ECHO "-set_version $verstring"` -update_registry $output_objdir/so_locations -o $lib~$RM $lib.exp'
+
+	# Both c and cxx compiler support -rpath directly
+	_LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-rpath $libdir'
+      fi
+      _LT_TAGVAR(archive_cmds_need_lc, $1)='no'
+      _LT_TAGVAR(hardcode_libdir_separator, $1)=:
+      ;;
+
+    solaris*)
+      _LT_TAGVAR(no_undefined_flag, $1)=' -z defs'
+      if test yes = "$GCC"; then
+	wlarc='$wl'
+	_LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag $wl-z ${wl}text $wl-h $wl$soname -o $lib $libobjs $deplibs $compiler_flags'
+	_LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~
+          $CC -shared $pic_flag $wl-z ${wl}text $wl-M $wl$lib.exp $wl-h $wl$soname -o $lib $libobjs $deplibs $compiler_flags~$RM $lib.exp'
+      else
+	case `$CC -V 2>&1` in
+	*"Compilers 5.0"*)
+	  wlarc=''
+	  _LT_TAGVAR(archive_cmds, $1)='$LD -G$allow_undefined_flag -h $soname -o $lib $libobjs $deplibs $linker_flags'
+	  _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~
+            $LD -G$allow_undefined_flag -M $lib.exp -h $soname -o $lib $libobjs $deplibs $linker_flags~$RM $lib.exp'
+	  ;;
+	*)
+	  wlarc='$wl'
+	  _LT_TAGVAR(archive_cmds, $1)='$CC -G$allow_undefined_flag -h $soname -o $lib $libobjs $deplibs $compiler_flags'
+	  _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~
+            $CC -G$allow_undefined_flag -M $lib.exp -h $soname -o $lib $libobjs $deplibs $compiler_flags~$RM $lib.exp'
+	  ;;
+	esac
+      fi
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-R$libdir'
+      _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+      case $host_os in
+      solaris2.[[0-5]] | solaris2.[[0-5]].*) ;;
+      *)
+	# The compiler driver will combine and reorder linker options,
+	# but understands '-z linker_flag'.  GCC discards it without '$wl',
+	# but is careful enough not to reorder.
+	# Supported since Solaris 2.6 (maybe 2.5.1?)
+	if test yes = "$GCC"; then
+	  _LT_TAGVAR(whole_archive_flag_spec, $1)='$wl-z ${wl}allextract$convenience $wl-z ${wl}defaultextract'
+	else
+	  _LT_TAGVAR(whole_archive_flag_spec, $1)='-z allextract$convenience -z defaultextract'
+	fi
+	;;
+      esac
+      _LT_TAGVAR(link_all_deplibs, $1)=yes
+      ;;
+
+    sunos4*)
+      if test sequent = "$host_vendor"; then
+	# Use $CC to link under sequent, because it throws in some extra .o
+	# files that make .init and .fini sections work.
+	_LT_TAGVAR(archive_cmds, $1)='$CC -G $wl-h $soname -o $lib $libobjs $deplibs $compiler_flags'
+      else
+	_LT_TAGVAR(archive_cmds, $1)='$LD -assert pure-text -Bstatic -o $lib $libobjs $deplibs $linker_flags'
+      fi
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir'
+      _LT_TAGVAR(hardcode_direct, $1)=yes
+      _LT_TAGVAR(hardcode_minus_L, $1)=yes
+      _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+      ;;
+
+    sysv4)
+      case $host_vendor in
+	sni)
+	  _LT_TAGVAR(archive_cmds, $1)='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+	  _LT_TAGVAR(hardcode_direct, $1)=yes # is this really true???
+	;;
+	siemens)
+	  ## LD is ld it makes a PLAMLIB
+	  ## CC just makes a GrossModule.
+	  _LT_TAGVAR(archive_cmds, $1)='$LD -G -o $lib $libobjs $deplibs $linker_flags'
+	  _LT_TAGVAR(reload_cmds, $1)='$CC -r -o $output$reload_objs'
+	  _LT_TAGVAR(hardcode_direct, $1)=no
+        ;;
+	motorola)
+	  _LT_TAGVAR(archive_cmds, $1)='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+	  _LT_TAGVAR(hardcode_direct, $1)=no #Motorola manual says yes, but my tests say they lie
+	;;
+      esac
+      runpath_var='LD_RUN_PATH'
+      _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+      ;;
+
+    sysv4.3*)
+      _LT_TAGVAR(archive_cmds, $1)='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+      _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+      _LT_TAGVAR(export_dynamic_flag_spec, $1)='-Bexport'
+      ;;
+
+    sysv4*MP*)
+      if test -d /usr/nec; then
+	_LT_TAGVAR(archive_cmds, $1)='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+	_LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+	runpath_var=LD_RUN_PATH
+	hardcode_runpath_var=yes
+	_LT_TAGVAR(ld_shlibs, $1)=yes
+      fi
+      ;;
+
+    sysv4*uw2* | sysv5OpenUNIX* | sysv5UnixWare7.[[01]].[[10]]* | unixware7* | sco3.2v5.0.[[024]]*)
+      _LT_TAGVAR(no_undefined_flag, $1)='$wl-z,text'
+      _LT_TAGVAR(archive_cmds_need_lc, $1)=no
+      _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+      runpath_var='LD_RUN_PATH'
+
+      if test yes = "$GCC"; then
+	_LT_TAGVAR(archive_cmds, $1)='$CC -shared $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	_LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $wl-Bexport:$export_symbols $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+      else
+	_LT_TAGVAR(archive_cmds, $1)='$CC -G $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	_LT_TAGVAR(archive_expsym_cmds, $1)='$CC -G $wl-Bexport:$export_symbols $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+      fi
+      ;;
+
+    sysv5* | sco3.2v5* | sco5v6*)
+      # Note: We CANNOT use -z defs as we might desire, because we do not
+      # link with -lc, and that would cause any symbols used from libc to
+      # always be unresolved, which means just about no library would
+      # ever link correctly.  If we're not using GNU ld we use -z text
+      # though, which does catch some bad symbols but isn't as heavy-handed
+      # as -z defs.
+      _LT_TAGVAR(no_undefined_flag, $1)='$wl-z,text'
+      _LT_TAGVAR(allow_undefined_flag, $1)='$wl-z,nodefs'
+      _LT_TAGVAR(archive_cmds_need_lc, $1)=no
+      _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-R,$libdir'
+      _LT_TAGVAR(hardcode_libdir_separator, $1)=':'
+      _LT_TAGVAR(link_all_deplibs, $1)=yes
+      _LT_TAGVAR(export_dynamic_flag_spec, $1)='$wl-Bexport'
+      runpath_var='LD_RUN_PATH'
+
+      if test yes = "$GCC"; then
+	_LT_TAGVAR(archive_cmds, $1)='$CC -shared $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	_LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $wl-Bexport:$export_symbols $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+      else
+	_LT_TAGVAR(archive_cmds, $1)='$CC -G $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	_LT_TAGVAR(archive_expsym_cmds, $1)='$CC -G $wl-Bexport:$export_symbols $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+      fi
+      ;;
+
+    uts4*)
+      _LT_TAGVAR(archive_cmds, $1)='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir'
+      _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+      ;;
+
+    *)
+      _LT_TAGVAR(ld_shlibs, $1)=no
+      ;;
+    esac
+
+    if test sni = "$host_vendor"; then
+      case $host in
+      sysv4 | sysv4.2uw2* | sysv4.3* | sysv5*)
+	_LT_TAGVAR(export_dynamic_flag_spec, $1)='$wl-Blargedynsym'
+	;;
+      esac
+    fi
+  fi
+])
+AC_MSG_RESULT([$_LT_TAGVAR(ld_shlibs, $1)])
+test no = "$_LT_TAGVAR(ld_shlibs, $1)" && can_build_shared=no
+
+_LT_TAGVAR(with_gnu_ld, $1)=$with_gnu_ld
+
+_LT_DECL([], [libext], [0], [Old archive suffix (normally "a")])dnl
+_LT_DECL([], [shrext_cmds], [1], [Shared library suffix (normally ".so")])dnl
+_LT_DECL([], [extract_expsyms_cmds], [2],
+    [The commands to extract the exported symbol list from a shared archive])
+
+#
+# Do we need to explicitly link libc?
+#
+case "x$_LT_TAGVAR(archive_cmds_need_lc, $1)" in
+x|xyes)
+  # Assume -lc should be added
+  _LT_TAGVAR(archive_cmds_need_lc, $1)=yes
+
+  if test yes,yes = "$GCC,$enable_shared"; then
+    case $_LT_TAGVAR(archive_cmds, $1) in
+    *'~'*)
+      # FIXME: we may have to deal with multi-command sequences.
+      ;;
+    '$CC '*)
+      # Test whether the compiler implicitly links with -lc since on some
+      # systems, -lgcc has to come before -lc. If gcc already passes -lc
+      # to ld, don't add -lc before -lgcc.
+      AC_CACHE_CHECK([whether -lc should be explicitly linked in],
+	[lt_cv_]_LT_TAGVAR(archive_cmds_need_lc, $1),
+	[$RM conftest*
+	echo "$lt_simple_compile_test_code" > conftest.$ac_ext
+
+	if AC_TRY_EVAL(ac_compile) 2>conftest.err; then
+	  soname=conftest
+	  lib=conftest
+	  libobjs=conftest.$ac_objext
+	  deplibs=
+	  wl=$_LT_TAGVAR(lt_prog_compiler_wl, $1)
+	  pic_flag=$_LT_TAGVAR(lt_prog_compiler_pic, $1)
+	  compiler_flags=-v
+	  linker_flags=-v
+	  verstring=
+	  output_objdir=.
+	  libname=conftest
+	  lt_save_allow_undefined_flag=$_LT_TAGVAR(allow_undefined_flag, $1)
+	  _LT_TAGVAR(allow_undefined_flag, $1)=
+	  if AC_TRY_EVAL(_LT_TAGVAR(archive_cmds, $1) 2\>\&1 \| $GREP \" -lc \" \>/dev/null 2\>\&1)
+	  then
+	    lt_cv_[]_LT_TAGVAR(archive_cmds_need_lc, $1)=no
+	  else
+	    lt_cv_[]_LT_TAGVAR(archive_cmds_need_lc, $1)=yes
+	  fi
+	  _LT_TAGVAR(allow_undefined_flag, $1)=$lt_save_allow_undefined_flag
+	else
+	  cat conftest.err 1>&5
+	fi
+	$RM conftest*
+	])
+      _LT_TAGVAR(archive_cmds_need_lc, $1)=$lt_cv_[]_LT_TAGVAR(archive_cmds_need_lc, $1)
+      ;;
+    esac
+  fi
+  ;;
+esac
+
+_LT_TAGDECL([build_libtool_need_lc], [archive_cmds_need_lc], [0],
+    [Whether or not to add -lc for building shared libraries])
+_LT_TAGDECL([allow_libtool_libs_with_static_runtimes],
+    [enable_shared_with_static_runtimes], [0],
+    [Whether or not to disallow shared libs when runtime libs are static])
+_LT_TAGDECL([], [export_dynamic_flag_spec], [1],
+    [Compiler flag to allow reflexive dlopens])
+_LT_TAGDECL([], [whole_archive_flag_spec], [1],
+    [Compiler flag to generate shared objects directly from archives])
+_LT_TAGDECL([], [compiler_needs_object], [1],
+    [Whether the compiler copes with passing no objects directly])
+_LT_TAGDECL([], [old_archive_from_new_cmds], [2],
+    [Create an old-style archive from a shared archive])
+_LT_TAGDECL([], [old_archive_from_expsyms_cmds], [2],
+    [Create a temporary old-style archive to link instead of a shared archive])
+_LT_TAGDECL([], [archive_cmds], [2], [Commands used to build a shared archive])
+_LT_TAGDECL([], [archive_expsym_cmds], [2])
+_LT_TAGDECL([], [module_cmds], [2],
+    [Commands used to build a loadable module if different from building
+    a shared archive.])
+_LT_TAGDECL([], [module_expsym_cmds], [2])
+_LT_TAGDECL([], [with_gnu_ld], [1],
+    [Whether we are building with GNU ld or not])
+_LT_TAGDECL([], [allow_undefined_flag], [1],
+    [Flag that allows shared libraries with undefined symbols to be built])
+_LT_TAGDECL([], [no_undefined_flag], [1],
+    [Flag that enforces no undefined symbols])
+_LT_TAGDECL([], [hardcode_libdir_flag_spec], [1],
+    [Flag to hardcode $libdir into a binary during linking.
+    This must work even if $libdir does not exist])
+_LT_TAGDECL([], [hardcode_libdir_separator], [1],
+    [Whether we need a single "-rpath" flag with a separated argument])
+_LT_TAGDECL([], [hardcode_direct], [0],
+    [Set to "yes" if using DIR/libNAME$shared_ext during linking hardcodes
+    DIR into the resulting binary])
+_LT_TAGDECL([], [hardcode_direct_absolute], [0],
+    [Set to "yes" if using DIR/libNAME$shared_ext during linking hardcodes
+    DIR into the resulting binary and the resulting library dependency is
+    "absolute", i.e impossible to change by setting $shlibpath_var if the
+    library is relocated])
+_LT_TAGDECL([], [hardcode_minus_L], [0],
+    [Set to "yes" if using the -LDIR flag during linking hardcodes DIR
+    into the resulting binary])
+_LT_TAGDECL([], [hardcode_shlibpath_var], [0],
+    [Set to "yes" if using SHLIBPATH_VAR=DIR during linking hardcodes DIR
+    into the resulting binary])
+_LT_TAGDECL([], [hardcode_automatic], [0],
+    [Set to "yes" if building a shared library automatically hardcodes DIR
+    into the library and all subsequent libraries and executables linked
+    against it])
+_LT_TAGDECL([], [inherit_rpath], [0],
+    [Set to yes if linker adds runtime paths of dependent libraries
+    to runtime path list])
+_LT_TAGDECL([], [link_all_deplibs], [0],
+    [Whether libtool must link a program against all its dependency libraries])
+_LT_TAGDECL([], [always_export_symbols], [0],
+    [Set to "yes" if exported symbols are required])
+_LT_TAGDECL([], [export_symbols_cmds], [2],
+    [The commands to list exported symbols])
+_LT_TAGDECL([], [exclude_expsyms], [1],
+    [Symbols that should not be listed in the preloaded symbols])
+_LT_TAGDECL([], [include_expsyms], [1],
+    [Symbols that must always be exported])
+_LT_TAGDECL([], [prelink_cmds], [2],
+    [Commands necessary for linking programs (against libraries) with templates])
+_LT_TAGDECL([], [postlink_cmds], [2],
+    [Commands necessary for finishing linking programs])
+_LT_TAGDECL([], [file_list_spec], [1],
+    [Specify filename containing input files])
+dnl FIXME: Not yet implemented
+dnl _LT_TAGDECL([], [thread_safe_flag_spec], [1],
+dnl    [Compiler flag to generate thread safe objects])
+])# _LT_LINKER_SHLIBS
+
+
+# _LT_LANG_C_CONFIG([TAG])
+# ------------------------
+# Ensure that the configuration variables for a C compiler are suitably
+# defined.  These variables are subsequently used by _LT_CONFIG to write
+# the compiler configuration to 'libtool'.
+m4_defun([_LT_LANG_C_CONFIG],
+[m4_require([_LT_DECL_EGREP])dnl
+lt_save_CC=$CC
+AC_LANG_PUSH(C)
+
+# Source file extension for C test sources.
+ac_ext=c
+
+# Object file extension for compiled C test sources.
+objext=o
+_LT_TAGVAR(objext, $1)=$objext
+
+# Code to be used in simple compile tests
+lt_simple_compile_test_code="int some_variable = 0;"
+
+# Code to be used in simple link tests
+lt_simple_link_test_code='int main(){return(0);}'
+
+_LT_TAG_COMPILER
+# Save the default compiler, since it gets overwritten when the other
+# tags are being tested, and _LT_TAGVAR(compiler, []) is a NOP.
+compiler_DEFAULT=$CC
+
+# save warnings/boilerplate of simple test code
+_LT_COMPILER_BOILERPLATE
+_LT_LINKER_BOILERPLATE
+
+if test -n "$compiler"; then
+  _LT_COMPILER_NO_RTTI($1)
+  _LT_COMPILER_PIC($1)
+  _LT_COMPILER_C_O($1)
+  _LT_COMPILER_FILE_LOCKS($1)
+  _LT_LINKER_SHLIBS($1)
+  _LT_SYS_DYNAMIC_LINKER($1)
+  _LT_LINKER_HARDCODE_LIBPATH($1)
+  LT_SYS_DLOPEN_SELF
+  _LT_CMD_STRIPLIB
+
+  # Report what library types will actually be built
+  AC_MSG_CHECKING([if libtool supports shared libraries])
+  AC_MSG_RESULT([$can_build_shared])
+
+  AC_MSG_CHECKING([whether to build shared libraries])
+  test no = "$can_build_shared" && enable_shared=no
+
+  # On AIX, shared libraries and static libraries use the same namespace, and
+  # are all built from PIC.
+  case $host_os in
+  aix3*)
+    test yes = "$enable_shared" && enable_static=no
+    if test -n "$RANLIB"; then
+      archive_cmds="$archive_cmds~\$RANLIB \$lib"
+      postinstall_cmds='$RANLIB $lib'
+    fi
+    ;;
+
+  aix[[4-9]]*)
+    if test ia64 != "$host_cpu"; then
+      case $enable_shared,$with_aix_soname,$aix_use_runtimelinking in
+      yes,aix,yes) ;;			# shared object as lib.so file only
+      yes,svr4,*) ;;			# shared object as lib.so archive member only
+      yes,*) enable_static=no ;;	# shared object in lib.a archive as well
+      esac
+    fi
+    ;;
+  esac
+  AC_MSG_RESULT([$enable_shared])
+
+  AC_MSG_CHECKING([whether to build static libraries])
+  # Make sure either enable_shared or enable_static is yes.
+  test yes = "$enable_shared" || enable_static=yes
+  AC_MSG_RESULT([$enable_static])
+
+  _LT_CONFIG($1)
+fi
+AC_LANG_POP
+CC=$lt_save_CC
+])# _LT_LANG_C_CONFIG
+
+
+# _LT_LANG_CXX_CONFIG([TAG])
+# --------------------------
+# Ensure that the configuration variables for a C++ compiler are suitably
+# defined.  These variables are subsequently used by _LT_CONFIG to write
+# the compiler configuration to 'libtool'.
+m4_defun([_LT_LANG_CXX_CONFIG],
+[m4_require([_LT_FILEUTILS_DEFAULTS])dnl
+m4_require([_LT_DECL_EGREP])dnl
+m4_require([_LT_PATH_MANIFEST_TOOL])dnl
+if test -n "$CXX" && ( test no != "$CXX" &&
+    ( (test g++ = "$CXX" && `g++ -v >/dev/null 2>&1` ) ||
+    (test g++ != "$CXX"))); then
+  AC_PROG_CXXCPP
+else
+  _lt_caught_CXX_error=yes
+fi
+
+AC_LANG_PUSH(C++)
+_LT_TAGVAR(archive_cmds_need_lc, $1)=no
+_LT_TAGVAR(allow_undefined_flag, $1)=
+_LT_TAGVAR(always_export_symbols, $1)=no
+_LT_TAGVAR(archive_expsym_cmds, $1)=
+_LT_TAGVAR(compiler_needs_object, $1)=no
+_LT_TAGVAR(export_dynamic_flag_spec, $1)=
+_LT_TAGVAR(hardcode_direct, $1)=no
+_LT_TAGVAR(hardcode_direct_absolute, $1)=no
+_LT_TAGVAR(hardcode_libdir_flag_spec, $1)=
+_LT_TAGVAR(hardcode_libdir_separator, $1)=
+_LT_TAGVAR(hardcode_minus_L, $1)=no
+_LT_TAGVAR(hardcode_shlibpath_var, $1)=unsupported
+_LT_TAGVAR(hardcode_automatic, $1)=no
+_LT_TAGVAR(inherit_rpath, $1)=no
+_LT_TAGVAR(module_cmds, $1)=
+_LT_TAGVAR(module_expsym_cmds, $1)=
+_LT_TAGVAR(link_all_deplibs, $1)=unknown
+_LT_TAGVAR(old_archive_cmds, $1)=$old_archive_cmds
+_LT_TAGVAR(reload_flag, $1)=$reload_flag
+_LT_TAGVAR(reload_cmds, $1)=$reload_cmds
+_LT_TAGVAR(no_undefined_flag, $1)=
+_LT_TAGVAR(whole_archive_flag_spec, $1)=
+_LT_TAGVAR(enable_shared_with_static_runtimes, $1)=no
+
+# Source file extension for C++ test sources.
+ac_ext=cpp
+
+# Object file extension for compiled C++ test sources.
+objext=o
+_LT_TAGVAR(objext, $1)=$objext
+
+# No sense in running all these tests if we already determined that
+# the CXX compiler isn't working.  Some variables (like enable_shared)
+# are currently assumed to apply to all compilers on this platform,
+# and will be corrupted by setting them based on a non-working compiler.
+if test yes != "$_lt_caught_CXX_error"; then
+  # Code to be used in simple compile tests
+  lt_simple_compile_test_code="int some_variable = 0;"
+
+  # Code to be used in simple link tests
+  lt_simple_link_test_code='int main(int, char *[[]]) { return(0); }'
+
+  # ltmain only uses $CC for tagged configurations so make sure $CC is set.
+  _LT_TAG_COMPILER
+
+  # save warnings/boilerplate of simple test code
+  _LT_COMPILER_BOILERPLATE
+  _LT_LINKER_BOILERPLATE
+
+  # Allow CC to be a program name with arguments.
+  lt_save_CC=$CC
+  lt_save_CFLAGS=$CFLAGS
+  lt_save_LD=$LD
+  lt_save_GCC=$GCC
+  GCC=$GXX
+  lt_save_with_gnu_ld=$with_gnu_ld
+  lt_save_path_LD=$lt_cv_path_LD
+  if test -n "${lt_cv_prog_gnu_ldcxx+set}"; then
+    lt_cv_prog_gnu_ld=$lt_cv_prog_gnu_ldcxx
+  else
+    $as_unset lt_cv_prog_gnu_ld
+  fi
+  if test -n "${lt_cv_path_LDCXX+set}"; then
+    lt_cv_path_LD=$lt_cv_path_LDCXX
+  else
+    $as_unset lt_cv_path_LD
+  fi
+  test -z "${LDCXX+set}" || LD=$LDCXX
+  CC=${CXX-"c++"}
+  CFLAGS=$CXXFLAGS
+  compiler=$CC
+  _LT_TAGVAR(compiler, $1)=$CC
+  _LT_CC_BASENAME([$compiler])
+
+  if test -n "$compiler"; then
+    # We don't want -fno-exception when compiling C++ code, so set the
+    # no_builtin_flag separately
+    if test yes = "$GXX"; then
+      _LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1)=' -fno-builtin'
+    else
+      _LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1)=
+    fi
+
+    if test yes = "$GXX"; then
+      # Set up default GNU C++ configuration
+
+      LT_PATH_LD
+
+      # Check if GNU C++ uses GNU ld as the underlying linker, since the
+      # archiving commands below assume that GNU ld is being used.
+      if test yes = "$with_gnu_ld"; then
+        _LT_TAGVAR(archive_cmds, $1)='$CC $pic_flag -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-soname $wl$soname -o $lib'
+        _LT_TAGVAR(archive_expsym_cmds, $1)='$CC $pic_flag -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-soname $wl$soname $wl-retain-symbols-file $wl$export_symbols -o $lib'
+
+        _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-rpath $wl$libdir'
+        _LT_TAGVAR(export_dynamic_flag_spec, $1)='$wl--export-dynamic'
+
+        # If archive_cmds runs LD, not CC, wlarc should be empty
+        # XXX I think wlarc can be eliminated in ltcf-cxx, but I need to
+        #     investigate it a little bit more. (MM)
+        wlarc='$wl'
+
+        # ancient GNU ld didn't support --whole-archive et. al.
+        if eval "`$CC -print-prog-name=ld` --help 2>&1" |
+	  $GREP 'no-whole-archive' > /dev/null; then
+          _LT_TAGVAR(whole_archive_flag_spec, $1)=$wlarc'--whole-archive$convenience '$wlarc'--no-whole-archive'
+        else
+          _LT_TAGVAR(whole_archive_flag_spec, $1)=
+        fi
+      else
+        with_gnu_ld=no
+        wlarc=
+
+        # A generic and very simple default shared library creation
+        # command for GNU C++ for the case where it uses the native
+        # linker, instead of GNU ld.  If possible, this setting should
+        # overridden to take advantage of the native linker features on
+        # the platform it is being used on.
+        _LT_TAGVAR(archive_cmds, $1)='$CC -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -o $lib'
+      fi
+
+      # Commands to make compiler produce verbose output that lists
+      # what "hidden" libraries, object files and flags are used when
+      # linking a shared library.
+      output_verbose_link_cmd='$CC -shared $CFLAGS -v conftest.$objext 2>&1 | $GREP -v "^Configured with:" | $GREP "\-L"'
+
+    else
+      GXX=no
+      with_gnu_ld=no
+      wlarc=
+    fi
+
+    # PORTME: fill in a description of your system's C++ link characteristics
+    AC_MSG_CHECKING([whether the $compiler linker ($LD) supports shared libraries])
+    _LT_TAGVAR(ld_shlibs, $1)=yes
+    case $host_os in
+      aix3*)
+        # FIXME: insert proper C++ library support
+        _LT_TAGVAR(ld_shlibs, $1)=no
+        ;;
+      aix[[4-9]]*)
+        if test ia64 = "$host_cpu"; then
+          # On IA64, the linker does run time linking by default, so we don't
+          # have to do anything special.
+          aix_use_runtimelinking=no
+          exp_sym_flag='-Bexport'
+          no_entry_flag=
+        else
+          aix_use_runtimelinking=no
+
+          # Test if we are trying to use run time linking or normal
+          # AIX style linking. If -brtl is somewhere in LDFLAGS, we
+          # have runtime linking enabled, and use it for executables.
+          # For shared libraries, we enable/disable runtime linking
+          # depending on the kind of the shared library created -
+          # when "with_aix_soname,aix_use_runtimelinking" is:
+          # "aix,no"   lib.a(lib.so.V) shared, rtl:no,  for executables
+          # "aix,yes"  lib.so          shared, rtl:yes, for executables
+          #            lib.a           static archive
+          # "both,no"  lib.so.V(shr.o) shared, rtl:yes
+          #            lib.a(lib.so.V) shared, rtl:no,  for executables
+          # "both,yes" lib.so.V(shr.o) shared, rtl:yes, for executables
+          #            lib.a(lib.so.V) shared, rtl:no
+          # "svr4,*"   lib.so.V(shr.o) shared, rtl:yes, for executables
+          #            lib.a           static archive
+          case $host_os in aix4.[[23]]|aix4.[[23]].*|aix[[5-9]]*)
+	    for ld_flag in $LDFLAGS; do
+	      case $ld_flag in
+	      *-brtl*)
+	        aix_use_runtimelinking=yes
+	        break
+	        ;;
+	      esac
+	    done
+	    if test svr4,no = "$with_aix_soname,$aix_use_runtimelinking"; then
+	      # With aix-soname=svr4, we create the lib.so.V shared archives only,
+	      # so we don't have lib.a shared libs to link our executables.
+	      # We have to force runtime linking in this case.
+	      aix_use_runtimelinking=yes
+	      LDFLAGS="$LDFLAGS -Wl,-brtl"
+	    fi
+	    ;;
+          esac
+
+          exp_sym_flag='-bexport'
+          no_entry_flag='-bnoentry'
+        fi
+
+        # When large executables or shared objects are built, AIX ld can
+        # have problems creating the table of contents.  If linking a library
+        # or program results in "error TOC overflow" add -mminimal-toc to
+        # CXXFLAGS/CFLAGS for g++/gcc.  In the cases where that is not
+        # enough to fix the problem, add -Wl,-bbigtoc to LDFLAGS.
+
+        _LT_TAGVAR(archive_cmds, $1)=''
+        _LT_TAGVAR(hardcode_direct, $1)=yes
+        _LT_TAGVAR(hardcode_direct_absolute, $1)=yes
+        _LT_TAGVAR(hardcode_libdir_separator, $1)=':'
+        _LT_TAGVAR(link_all_deplibs, $1)=yes
+        _LT_TAGVAR(file_list_spec, $1)='$wl-f,'
+        case $with_aix_soname,$aix_use_runtimelinking in
+        aix,*) ;;	# no import file
+        svr4,* | *,yes) # use import file
+          # The Import File defines what to hardcode.
+          _LT_TAGVAR(hardcode_direct, $1)=no
+          _LT_TAGVAR(hardcode_direct_absolute, $1)=no
+          ;;
+        esac
+
+        if test yes = "$GXX"; then
+          case $host_os in aix4.[[012]]|aix4.[[012]].*)
+          # We only want to do this on AIX 4.2 and lower, the check
+          # below for broken collect2 doesn't work under 4.3+
+	  collect2name=`$CC -print-prog-name=collect2`
+	  if test -f "$collect2name" &&
+	     strings "$collect2name" | $GREP resolve_lib_name >/dev/null
+	  then
+	    # We have reworked collect2
+	    :
+	  else
+	    # We have old collect2
+	    _LT_TAGVAR(hardcode_direct, $1)=unsupported
+	    # It fails to find uninstalled libraries when the uninstalled
+	    # path is not listed in the libpath.  Setting hardcode_minus_L
+	    # to unsupported forces relinking
+	    _LT_TAGVAR(hardcode_minus_L, $1)=yes
+	    _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir'
+	    _LT_TAGVAR(hardcode_libdir_separator, $1)=
+	  fi
+          esac
+          shared_flag='-shared'
+	  if test yes = "$aix_use_runtimelinking"; then
+	    shared_flag=$shared_flag' $wl-G'
+	  fi
+	  # Need to ensure runtime linking is disabled for the traditional
+	  # shared library, or the linker may eventually find shared libraries
+	  # /with/ Import File - we do not want to mix them.
+	  shared_flag_aix='-shared'
+	  shared_flag_svr4='-shared $wl-G'
+        else
+          # not using gcc
+          if test ia64 = "$host_cpu"; then
+	  # VisualAge C++, Version 5.5 for AIX 5L for IA-64, Beta 3 Release
+	  # chokes on -Wl,-G. The following line is correct:
+	  shared_flag='-G'
+          else
+	    if test yes = "$aix_use_runtimelinking"; then
+	      shared_flag='$wl-G'
+	    else
+	      shared_flag='$wl-bM:SRE'
+	    fi
+	    shared_flag_aix='$wl-bM:SRE'
+	    shared_flag_svr4='$wl-G'
+          fi
+        fi
+
+        _LT_TAGVAR(export_dynamic_flag_spec, $1)='$wl-bexpall'
+        # It seems that -bexpall does not export symbols beginning with
+        # underscore (_), so it is better to generate a list of symbols to
+	# export.
+        _LT_TAGVAR(always_export_symbols, $1)=yes
+	if test aix,yes = "$with_aix_soname,$aix_use_runtimelinking"; then
+          # Warning - without using the other runtime loading flags (-brtl),
+          # -berok will link without error, but may produce a broken library.
+          # The "-G" linker flag allows undefined symbols.
+          _LT_TAGVAR(no_undefined_flag, $1)='-bernotok'
+          # Determine the default libpath from the value encoded in an empty
+          # executable.
+          _LT_SYS_MODULE_PATH_AIX([$1])
+          _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-blibpath:$libdir:'"$aix_libpath"
+
+          _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -o $output_objdir/$soname $libobjs $deplibs $wl'$no_entry_flag' $compiler_flags `if test -n "$allow_undefined_flag"; then func_echo_all "$wl$allow_undefined_flag"; else :; fi` $wl'$exp_sym_flag:\$export_symbols' '$shared_flag
+        else
+          if test ia64 = "$host_cpu"; then
+	    _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-R $libdir:/usr/lib:/lib'
+	    _LT_TAGVAR(allow_undefined_flag, $1)="-z nodefs"
+	    _LT_TAGVAR(archive_expsym_cmds, $1)="\$CC $shared_flag"' -o $output_objdir/$soname $libobjs $deplibs '"\$wl$no_entry_flag"' $compiler_flags $wl$allow_undefined_flag '"\$wl$exp_sym_flag:\$export_symbols"
+          else
+	    # Determine the default libpath from the value encoded in an
+	    # empty executable.
+	    _LT_SYS_MODULE_PATH_AIX([$1])
+	    _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-blibpath:$libdir:'"$aix_libpath"
+	    # Warning - without using the other run time loading flags,
+	    # -berok will link without error, but may produce a broken library.
+	    _LT_TAGVAR(no_undefined_flag, $1)=' $wl-bernotok'
+	    _LT_TAGVAR(allow_undefined_flag, $1)=' $wl-berok'
+	    if test yes = "$with_gnu_ld"; then
+	      # We only use this code for GNU lds that support --whole-archive.
+	      _LT_TAGVAR(whole_archive_flag_spec, $1)='$wl--whole-archive$convenience $wl--no-whole-archive'
+	    else
+	      # Exported symbols can be pulled into shared objects from archives
+	      _LT_TAGVAR(whole_archive_flag_spec, $1)='$convenience'
+	    fi
+	    _LT_TAGVAR(archive_cmds_need_lc, $1)=yes
+	    _LT_TAGVAR(archive_expsym_cmds, $1)='$RM -r $output_objdir/$realname.d~$MKDIR $output_objdir/$realname.d'
+	    # -brtl affects multiple linker settings, -berok does not and is overridden later
+	    compiler_flags_filtered='`func_echo_all "$compiler_flags " | $SED -e "s%-brtl\\([[, ]]\\)%-berok\\1%g"`'
+	    if test svr4 != "$with_aix_soname"; then
+	      # This is similar to how AIX traditionally builds its shared
+	      # libraries. Need -bnortl late, we may have -brtl in LDFLAGS.
+	      _LT_TAGVAR(archive_expsym_cmds, $1)="$_LT_TAGVAR(archive_expsym_cmds, $1)"'~$CC '$shared_flag_aix' -o $output_objdir/$realname.d/$soname $libobjs $deplibs $wl-bnoentry '$compiler_flags_filtered'$wl-bE:$export_symbols$allow_undefined_flag~$AR $AR_FLAGS $output_objdir/$libname$release.a $output_objdir/$realname.d/$soname'
+	    fi
+	    if test aix != "$with_aix_soname"; then
+	      _LT_TAGVAR(archive_expsym_cmds, $1)="$_LT_TAGVAR(archive_expsym_cmds, $1)"'~$CC '$shared_flag_svr4' -o $output_objdir/$realname.d/$shared_archive_member_spec.o $libobjs $deplibs $wl-bnoentry '$compiler_flags_filtered'$wl-bE:$export_symbols$allow_undefined_flag~$STRIP -e $output_objdir/$realname.d/$shared_archive_member_spec.o~( func_echo_all "#! $soname($shared_archive_member_spec.o)"; if test shr_64 = "$shared_archive_member_spec"; then func_echo_all "# 64"; else func_echo_all "# 32"; fi; cat $export_symbols ) > $output_objdir/$realname.d/$shared_archive_member_spec.imp~$AR $AR_FLAGS $output_objdir/$soname $output_objdir/$realname.d/$shared_archive_member_spec.o $output_objdir/$realname.d/$shared_archive_member_spec.imp'
+	    else
+	      # used by -dlpreopen to get the symbols
+	      _LT_TAGVAR(archive_expsym_cmds, $1)="$_LT_TAGVAR(archive_expsym_cmds, $1)"'~$MV  $output_objdir/$realname.d/$soname $output_objdir'
+	    fi
+	    _LT_TAGVAR(archive_expsym_cmds, $1)="$_LT_TAGVAR(archive_expsym_cmds, $1)"'~$RM -r $output_objdir/$realname.d'
+          fi
+        fi
+        ;;
+
+      beos*)
+	if $LD --help 2>&1 | $GREP ': supported targets:.* elf' > /dev/null; then
+	  _LT_TAGVAR(allow_undefined_flag, $1)=unsupported
+	  # Joseph Beckenbach <jrb3@best.com> says some releases of gcc
+	  # support --undefined.  This deserves some investigation.  FIXME
+	  _LT_TAGVAR(archive_cmds, $1)='$CC -nostart $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib'
+	else
+	  _LT_TAGVAR(ld_shlibs, $1)=no
+	fi
+	;;
+
+      chorus*)
+        case $cc_basename in
+          *)
+	  # FIXME: insert proper C++ library support
+	  _LT_TAGVAR(ld_shlibs, $1)=no
+	  ;;
+        esac
+        ;;
+
+      cygwin* | mingw* | pw32* | cegcc*)
+	case $GXX,$cc_basename in
+	,cl* | no,cl*)
+	  # Native MSVC
+	  # hardcode_libdir_flag_spec is actually meaningless, as there is
+	  # no search path for DLLs.
+	  _LT_TAGVAR(hardcode_libdir_flag_spec, $1)=' '
+	  _LT_TAGVAR(allow_undefined_flag, $1)=unsupported
+	  _LT_TAGVAR(always_export_symbols, $1)=yes
+	  _LT_TAGVAR(file_list_spec, $1)='@'
+	  # Tell ltmain to make .lib files, not .a files.
+	  libext=lib
+	  # Tell ltmain to make .dll files, not .so files.
+	  shrext_cmds=.dll
+	  # FIXME: Setting linknames here is a bad hack.
+	  _LT_TAGVAR(archive_cmds, $1)='$CC -o $output_objdir/$soname $libobjs $compiler_flags $deplibs -Wl,-DLL,-IMPLIB:"$tool_output_objdir$libname.dll.lib"~linknames='
+	  _LT_TAGVAR(archive_expsym_cmds, $1)='if _LT_DLL_DEF_P([$export_symbols]); then
+              cp "$export_symbols" "$output_objdir/$soname.def";
+              echo "$tool_output_objdir$soname.def" > "$output_objdir/$soname.exp";
+            else
+              $SED -e '\''s/^/-link -EXPORT:/'\'' < $export_symbols > $output_objdir/$soname.exp;
+            fi~
+            $CC -o $tool_output_objdir$soname $libobjs $compiler_flags $deplibs "@$tool_output_objdir$soname.exp" -Wl,-DLL,-IMPLIB:"$tool_output_objdir$libname.dll.lib"~
+            linknames='
+	  # The linker will not automatically build a static lib if we build a DLL.
+	  # _LT_TAGVAR(old_archive_from_new_cmds, $1)='true'
+	  _LT_TAGVAR(enable_shared_with_static_runtimes, $1)=yes
+	  # Don't use ranlib
+	  _LT_TAGVAR(old_postinstall_cmds, $1)='chmod 644 $oldlib'
+	  _LT_TAGVAR(postlink_cmds, $1)='lt_outputfile="@OUTPUT@"~
+            lt_tool_outputfile="@TOOL_OUTPUT@"~
+            case $lt_outputfile in
+              *.exe|*.EXE) ;;
+              *)
+                lt_outputfile=$lt_outputfile.exe
+                lt_tool_outputfile=$lt_tool_outputfile.exe
+                ;;
+            esac~
+            func_to_tool_file "$lt_outputfile"~
+            if test : != "$MANIFEST_TOOL" && test -f "$lt_outputfile.manifest"; then
+              $MANIFEST_TOOL -manifest "$lt_tool_outputfile.manifest" -outputresource:"$lt_tool_outputfile" || exit 1;
+              $RM "$lt_outputfile.manifest";
+            fi'
+	  ;;
+	*)
+	  # g++
+	  # _LT_TAGVAR(hardcode_libdir_flag_spec, $1) is actually meaningless,
+	  # as there is no search path for DLLs.
+	  _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir'
+	  _LT_TAGVAR(export_dynamic_flag_spec, $1)='$wl--export-all-symbols'
+	  _LT_TAGVAR(allow_undefined_flag, $1)=unsupported
+	  _LT_TAGVAR(always_export_symbols, $1)=no
+	  _LT_TAGVAR(enable_shared_with_static_runtimes, $1)=yes
+
+	  if $LD --help 2>&1 | $GREP 'auto-import' > /dev/null; then
+	    _LT_TAGVAR(archive_cmds, $1)='$CC -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -o $output_objdir/$soname $wl--enable-auto-image-base -Xlinker --out-implib -Xlinker $lib'
+	    # If the export-symbols file already is a .def file, use it as
+	    # is; otherwise, prepend EXPORTS...
+	    _LT_TAGVAR(archive_expsym_cmds, $1)='if _LT_DLL_DEF_P([$export_symbols]); then
+              cp $export_symbols $output_objdir/$soname.def;
+            else
+              echo EXPORTS > $output_objdir/$soname.def;
+              cat $export_symbols >> $output_objdir/$soname.def;
+            fi~
+            $CC -shared -nostdlib $output_objdir/$soname.def $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -o $output_objdir/$soname $wl--enable-auto-image-base -Xlinker --out-implib -Xlinker $lib'
+	  else
+	    _LT_TAGVAR(ld_shlibs, $1)=no
+	  fi
+	  ;;
+	esac
+	;;
+      darwin* | rhapsody*)
+        _LT_DARWIN_LINKER_FEATURES($1)
+	;;
+
+      os2*)
+	_LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir'
+	_LT_TAGVAR(hardcode_minus_L, $1)=yes
+	_LT_TAGVAR(allow_undefined_flag, $1)=unsupported
+	shrext_cmds=.dll
+	_LT_TAGVAR(archive_cmds, $1)='$ECHO "LIBRARY ${soname%$shared_ext} INITINSTANCE TERMINSTANCE" > $output_objdir/$libname.def~
+	  $ECHO "DESCRIPTION \"$libname\"" >> $output_objdir/$libname.def~
+	  $ECHO "DATA MULTIPLE NONSHARED" >> $output_objdir/$libname.def~
+	  $ECHO EXPORTS >> $output_objdir/$libname.def~
+	  emxexp $libobjs | $SED /"_DLL_InitTerm"/d >> $output_objdir/$libname.def~
+	  $CC -Zdll -Zcrtdll -o $output_objdir/$soname $libobjs $deplibs $compiler_flags $output_objdir/$libname.def~
+	  emximp -o $lib $output_objdir/$libname.def'
+	_LT_TAGVAR(archive_expsym_cmds, $1)='$ECHO "LIBRARY ${soname%$shared_ext} INITINSTANCE TERMINSTANCE" > $output_objdir/$libname.def~
+	  $ECHO "DESCRIPTION \"$libname\"" >> $output_objdir/$libname.def~
+	  $ECHO "DATA MULTIPLE NONSHARED" >> $output_objdir/$libname.def~
+	  $ECHO EXPORTS >> $output_objdir/$libname.def~
+	  prefix_cmds="$SED"~
+	  if test EXPORTS = "`$SED 1q $export_symbols`"; then
+	    prefix_cmds="$prefix_cmds -e 1d";
+	  fi~
+	  prefix_cmds="$prefix_cmds -e \"s/^\(.*\)$/_\1/g\""~
+	  cat $export_symbols | $prefix_cmds >> $output_objdir/$libname.def~
+	  $CC -Zdll -Zcrtdll -o $output_objdir/$soname $libobjs $deplibs $compiler_flags $output_objdir/$libname.def~
+	  emximp -o $lib $output_objdir/$libname.def'
+	_LT_TAGVAR(old_archive_From_new_cmds, $1)='emximp -o $output_objdir/${libname}_dll.a $output_objdir/$libname.def'
+	_LT_TAGVAR(enable_shared_with_static_runtimes, $1)=yes
+	;;
+
+      dgux*)
+        case $cc_basename in
+          ec++*)
+	    # FIXME: insert proper C++ library support
+	    _LT_TAGVAR(ld_shlibs, $1)=no
+	    ;;
+          ghcx*)
+	    # Green Hills C++ Compiler
+	    # FIXME: insert proper C++ library support
+	    _LT_TAGVAR(ld_shlibs, $1)=no
+	    ;;
+          *)
+	    # FIXME: insert proper C++ library support
+	    _LT_TAGVAR(ld_shlibs, $1)=no
+	    ;;
+        esac
+        ;;
+
+      freebsd2.*)
+        # C++ shared libraries reported to be fairly broken before
+	# switch to ELF
+        _LT_TAGVAR(ld_shlibs, $1)=no
+        ;;
+
+      freebsd-elf*)
+        _LT_TAGVAR(archive_cmds_need_lc, $1)=no
+        ;;
+
+      freebsd* | dragonfly*)
+        # FreeBSD 3 and later use GNU C++ and GNU ld with standard ELF
+        # conventions
+        _LT_TAGVAR(ld_shlibs, $1)=yes
+        ;;
+
+      haiku*)
+        _LT_TAGVAR(archive_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib'
+        _LT_TAGVAR(link_all_deplibs, $1)=yes
+        ;;
+
+      hpux9*)
+        _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl+b $wl$libdir'
+        _LT_TAGVAR(hardcode_libdir_separator, $1)=:
+        _LT_TAGVAR(export_dynamic_flag_spec, $1)='$wl-E'
+        _LT_TAGVAR(hardcode_direct, $1)=yes
+        _LT_TAGVAR(hardcode_minus_L, $1)=yes # Not in the search PATH,
+				             # but as the default
+				             # location of the library.
+
+        case $cc_basename in
+          CC*)
+            # FIXME: insert proper C++ library support
+            _LT_TAGVAR(ld_shlibs, $1)=no
+            ;;
+          aCC*)
+            _LT_TAGVAR(archive_cmds, $1)='$RM $output_objdir/$soname~$CC -b $wl+b $wl$install_libdir -o $output_objdir/$soname $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags~test "x$output_objdir/$soname" = "x$lib" || mv $output_objdir/$soname $lib'
+            # Commands to make compiler produce verbose output that lists
+            # what "hidden" libraries, object files and flags are used when
+            # linking a shared library.
+            #
+            # There doesn't appear to be a way to prevent this compiler from
+            # explicitly linking system object files so we need to strip them
+            # from the output so that they don't get included in the library
+            # dependencies.
+            output_verbose_link_cmd='templist=`($CC -b $CFLAGS -v conftest.$objext 2>&1) | $EGREP "\-L"`; list= ; for z in $templist; do case $z in conftest.$objext) list="$list $z";; *.$objext);; *) list="$list $z";;esac; done; func_echo_all "$list"'
+            ;;
+          *)
+            if test yes = "$GXX"; then
+              _LT_TAGVAR(archive_cmds, $1)='$RM $output_objdir/$soname~$CC -shared -nostdlib $pic_flag $wl+b $wl$install_libdir -o $output_objdir/$soname $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags~test "x$output_objdir/$soname" = "x$lib" || mv $output_objdir/$soname $lib'
+            else
+              # FIXME: insert proper C++ library support
+              _LT_TAGVAR(ld_shlibs, $1)=no
+            fi
+            ;;
+        esac
+        ;;
+
+      hpux10*|hpux11*)
+        if test no = "$with_gnu_ld"; then
+	  _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl+b $wl$libdir'
+	  _LT_TAGVAR(hardcode_libdir_separator, $1)=:
+
+          case $host_cpu in
+            hppa*64*|ia64*)
+              ;;
+            *)
+	      _LT_TAGVAR(export_dynamic_flag_spec, $1)='$wl-E'
+              ;;
+          esac
+        fi
+        case $host_cpu in
+          hppa*64*|ia64*)
+            _LT_TAGVAR(hardcode_direct, $1)=no
+            _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+            ;;
+          *)
+            _LT_TAGVAR(hardcode_direct, $1)=yes
+            _LT_TAGVAR(hardcode_direct_absolute, $1)=yes
+            _LT_TAGVAR(hardcode_minus_L, $1)=yes # Not in the search PATH,
+					         # but as the default
+					         # location of the library.
+            ;;
+        esac
+
+        case $cc_basename in
+          CC*)
+	    # FIXME: insert proper C++ library support
+	    _LT_TAGVAR(ld_shlibs, $1)=no
+	    ;;
+          aCC*)
+	    case $host_cpu in
+	      hppa*64*)
+	        _LT_TAGVAR(archive_cmds, $1)='$CC -b $wl+h $wl$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags'
+	        ;;
+	      ia64*)
+	        _LT_TAGVAR(archive_cmds, $1)='$CC -b $wl+h $wl$soname $wl+nodefaultrpath -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags'
+	        ;;
+	      *)
+	        _LT_TAGVAR(archive_cmds, $1)='$CC -b $wl+h $wl$soname $wl+b $wl$install_libdir -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags'
+	        ;;
+	    esac
+	    # Commands to make compiler produce verbose output that lists
+	    # what "hidden" libraries, object files and flags are used when
+	    # linking a shared library.
+	    #
+	    # There doesn't appear to be a way to prevent this compiler from
+	    # explicitly linking system object files so we need to strip them
+	    # from the output so that they don't get included in the library
+	    # dependencies.
+	    output_verbose_link_cmd='templist=`($CC -b $CFLAGS -v conftest.$objext 2>&1) | $GREP "\-L"`; list= ; for z in $templist; do case $z in conftest.$objext) list="$list $z";; *.$objext);; *) list="$list $z";;esac; done; func_echo_all "$list"'
+	    ;;
+          *)
+	    if test yes = "$GXX"; then
+	      if test no = "$with_gnu_ld"; then
+	        case $host_cpu in
+	          hppa*64*)
+	            _LT_TAGVAR(archive_cmds, $1)='$CC -shared -nostdlib -fPIC $wl+h $wl$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags'
+	            ;;
+	          ia64*)
+	            _LT_TAGVAR(archive_cmds, $1)='$CC -shared -nostdlib $pic_flag $wl+h $wl$soname $wl+nodefaultrpath -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags'
+	            ;;
+	          *)
+	            _LT_TAGVAR(archive_cmds, $1)='$CC -shared -nostdlib $pic_flag $wl+h $wl$soname $wl+b $wl$install_libdir -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags'
+	            ;;
+	        esac
+	      fi
+	    else
+	      # FIXME: insert proper C++ library support
+	      _LT_TAGVAR(ld_shlibs, $1)=no
+	    fi
+	    ;;
+        esac
+        ;;
+
+      interix[[3-9]]*)
+	_LT_TAGVAR(hardcode_direct, $1)=no
+	_LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+	_LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-rpath,$libdir'
+	_LT_TAGVAR(export_dynamic_flag_spec, $1)='$wl-E'
+	# Hack: On Interix 3.x, we cannot compile PIC because of a broken gcc.
+	# Instead, shared libraries are loaded at an image base (0x10000000 by
+	# default) and relocated if they conflict, which is a slow very memory
+	# consuming and fragmenting process.  To avoid this, we pick a random,
+	# 256 KiB-aligned image base between 0x50000000 and 0x6FFC0000 at link
+	# time.  Moving up from 0x10000000 also allows more sbrk(2) space.
+	_LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-h,$soname $wl--image-base,`expr ${RANDOM-$$} % 4096 / 2 \* 262144 + 1342177280` -o $lib'
+	_LT_TAGVAR(archive_expsym_cmds, $1)='sed "s|^|_|" $export_symbols >$output_objdir/$soname.expsym~$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-h,$soname $wl--retain-symbols-file,$output_objdir/$soname.expsym $wl--image-base,`expr ${RANDOM-$$} % 4096 / 2 \* 262144 + 1342177280` -o $lib'
+	;;
+      irix5* | irix6*)
+        case $cc_basename in
+          CC*)
+	    # SGI C++
+	    _LT_TAGVAR(archive_cmds, $1)='$CC -shared -all -multigot $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -soname $soname `test -n "$verstring" && func_echo_all "-set_version $verstring"` -update_registry $output_objdir/so_locations -o $lib'
+
+	    # Archives containing C++ object files must be created using
+	    # "CC -ar", where "CC" is the IRIX C++ compiler.  This is
+	    # necessary to make sure instantiated templates are included
+	    # in the archive.
+	    _LT_TAGVAR(old_archive_cmds, $1)='$CC -ar -WR,-u -o $oldlib $oldobjs'
+	    ;;
+          *)
+	    if test yes = "$GXX"; then
+	      if test no = "$with_gnu_ld"; then
+	        _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-soname $wl$soname `test -n "$verstring" && func_echo_all "$wl-set_version $wl$verstring"` $wl-update_registry $wl$output_objdir/so_locations -o $lib'
+	      else
+	        _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-soname $wl$soname `test -n "$verstring" && func_echo_all "$wl-set_version $wl$verstring"` -o $lib'
+	      fi
+	    fi
+	    _LT_TAGVAR(link_all_deplibs, $1)=yes
+	    ;;
+        esac
+        _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-rpath $wl$libdir'
+        _LT_TAGVAR(hardcode_libdir_separator, $1)=:
+        _LT_TAGVAR(inherit_rpath, $1)=yes
+        ;;
+
+      linux* | k*bsd*-gnu | kopensolaris*-gnu | gnu*)
+        case $cc_basename in
+          KCC*)
+	    # Kuck and Associates, Inc. (KAI) C++ Compiler
+
+	    # KCC will only create a shared library if the output file
+	    # ends with ".so" (or ".sl" for HP-UX), so rename the library
+	    # to its proper name (with version) after linking.
+	    _LT_TAGVAR(archive_cmds, $1)='tempext=`echo $shared_ext | $SED -e '\''s/\([[^()0-9A-Za-z{}]]\)/\\\\\1/g'\''`; templib=`echo $lib | $SED -e "s/\$tempext\..*/.so/"`; $CC $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags --soname $soname -o \$templib; mv \$templib $lib'
+	    _LT_TAGVAR(archive_expsym_cmds, $1)='tempext=`echo $shared_ext | $SED -e '\''s/\([[^()0-9A-Za-z{}]]\)/\\\\\1/g'\''`; templib=`echo $lib | $SED -e "s/\$tempext\..*/.so/"`; $CC $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags --soname $soname -o \$templib $wl-retain-symbols-file,$export_symbols; mv \$templib $lib'
+	    # Commands to make compiler produce verbose output that lists
+	    # what "hidden" libraries, object files and flags are used when
+	    # linking a shared library.
+	    #
+	    # There doesn't appear to be a way to prevent this compiler from
+	    # explicitly linking system object files so we need to strip them
+	    # from the output so that they don't get included in the library
+	    # dependencies.
+	    output_verbose_link_cmd='templist=`$CC $CFLAGS -v conftest.$objext -o libconftest$shared_ext 2>&1 | $GREP "ld"`; rm -f libconftest$shared_ext; list= ; for z in $templist; do case $z in conftest.$objext) list="$list $z";; *.$objext);; *) list="$list $z";;esac; done; func_echo_all "$list"'
+
+	    _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-rpath,$libdir'
+	    _LT_TAGVAR(export_dynamic_flag_spec, $1)='$wl--export-dynamic'
+
+	    # Archives containing C++ object files must be created using
+	    # "CC -Bstatic", where "CC" is the KAI C++ compiler.
+	    _LT_TAGVAR(old_archive_cmds, $1)='$CC -Bstatic -o $oldlib $oldobjs'
+	    ;;
+	  icpc* | ecpc* )
+	    # Intel C++
+	    with_gnu_ld=yes
+	    # version 8.0 and above of icpc choke on multiply defined symbols
+	    # if we add $predep_objects and $postdep_objects, however 7.1 and
+	    # earlier do not add the objects themselves.
+	    case `$CC -V 2>&1` in
+	      *"Version 7."*)
+	        _LT_TAGVAR(archive_cmds, $1)='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-soname $wl$soname -o $lib'
+		_LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-soname $wl$soname $wl-retain-symbols-file $wl$export_symbols -o $lib'
+		;;
+	      *)  # Version 8.0 or newer
+	        tmp_idyn=
+	        case $host_cpu in
+		  ia64*) tmp_idyn=' -i_dynamic';;
+		esac
+	        _LT_TAGVAR(archive_cmds, $1)='$CC -shared'"$tmp_idyn"' $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib'
+		_LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared'"$tmp_idyn"' $libobjs $deplibs $compiler_flags $wl-soname $wl$soname $wl-retain-symbols-file $wl$export_symbols -o $lib'
+		;;
+	    esac
+	    _LT_TAGVAR(archive_cmds_need_lc, $1)=no
+	    _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-rpath,$libdir'
+	    _LT_TAGVAR(export_dynamic_flag_spec, $1)='$wl--export-dynamic'
+	    _LT_TAGVAR(whole_archive_flag_spec, $1)='$wl--whole-archive$convenience $wl--no-whole-archive'
+	    ;;
+          pgCC* | pgcpp*)
+            # Portland Group C++ compiler
+	    case `$CC -V` in
+	    *pgCC\ [[1-5]].* | *pgcpp\ [[1-5]].*)
+	      _LT_TAGVAR(prelink_cmds, $1)='tpldir=Template.dir~
+               rm -rf $tpldir~
+               $CC --prelink_objects --instantiation_dir $tpldir $objs $libobjs $compile_deplibs~
+               compile_command="$compile_command `find $tpldir -name \*.o | sort | $NL2SP`"'
+	      _LT_TAGVAR(old_archive_cmds, $1)='tpldir=Template.dir~
+                rm -rf $tpldir~
+                $CC --prelink_objects --instantiation_dir $tpldir $oldobjs$old_deplibs~
+                $AR $AR_FLAGS $oldlib$oldobjs$old_deplibs `find $tpldir -name \*.o | sort | $NL2SP`~
+                $RANLIB $oldlib'
+	      _LT_TAGVAR(archive_cmds, $1)='tpldir=Template.dir~
+                rm -rf $tpldir~
+                $CC --prelink_objects --instantiation_dir $tpldir $predep_objects $libobjs $deplibs $convenience $postdep_objects~
+                $CC -shared $pic_flag $predep_objects $libobjs $deplibs `find $tpldir -name \*.o | sort | $NL2SP` $postdep_objects $compiler_flags $wl-soname $wl$soname -o $lib'
+	      _LT_TAGVAR(archive_expsym_cmds, $1)='tpldir=Template.dir~
+                rm -rf $tpldir~
+                $CC --prelink_objects --instantiation_dir $tpldir $predep_objects $libobjs $deplibs $convenience $postdep_objects~
+                $CC -shared $pic_flag $predep_objects $libobjs $deplibs `find $tpldir -name \*.o | sort | $NL2SP` $postdep_objects $compiler_flags $wl-soname $wl$soname $wl-retain-symbols-file $wl$export_symbols -o $lib'
+	      ;;
+	    *) # Version 6 and above use weak symbols
+	      _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-soname $wl$soname -o $lib'
+	      _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $pic_flag $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-soname $wl$soname $wl-retain-symbols-file $wl$export_symbols -o $lib'
+	      ;;
+	    esac
+
+	    _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl--rpath $wl$libdir'
+	    _LT_TAGVAR(export_dynamic_flag_spec, $1)='$wl--export-dynamic'
+	    _LT_TAGVAR(whole_archive_flag_spec, $1)='$wl--whole-archive`for conv in $convenience\"\"; do test  -n \"$conv\" && new_convenience=\"$new_convenience,$conv\"; done; func_echo_all \"$new_convenience\"` $wl--no-whole-archive'
+            ;;
+	  cxx*)
+	    # Compaq C++
+	    _LT_TAGVAR(archive_cmds, $1)='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-soname $wl$soname -o $lib'
+	    _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-soname $wl$soname  -o $lib $wl-retain-symbols-file $wl$export_symbols'
+
+	    runpath_var=LD_RUN_PATH
+	    _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-rpath $libdir'
+	    _LT_TAGVAR(hardcode_libdir_separator, $1)=:
+
+	    # Commands to make compiler produce verbose output that lists
+	    # what "hidden" libraries, object files and flags are used when
+	    # linking a shared library.
+	    #
+	    # There doesn't appear to be a way to prevent this compiler from
+	    # explicitly linking system object files so we need to strip them
+	    # from the output so that they don't get included in the library
+	    # dependencies.
+	    output_verbose_link_cmd='templist=`$CC -shared $CFLAGS -v conftest.$objext 2>&1 | $GREP "ld"`; templist=`func_echo_all "$templist" | $SED "s/\(^.*ld.*\)\( .*ld .*$\)/\1/"`; list= ; for z in $templist; do case $z in conftest.$objext) list="$list $z";; *.$objext);; *) list="$list $z";;esac; done; func_echo_all "X$list" | $Xsed'
+	    ;;
+	  xl* | mpixl* | bgxl*)
+	    # IBM XL 8.0 on PPC, with GNU ld
+	    _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-rpath $wl$libdir'
+	    _LT_TAGVAR(export_dynamic_flag_spec, $1)='$wl--export-dynamic'
+	    _LT_TAGVAR(archive_cmds, $1)='$CC -qmkshrobj $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib'
+	    if test yes = "$supports_anon_versioning"; then
+	      _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $output_objdir/$libname.ver~
+                cat $export_symbols | sed -e "s/\(.*\)/\1;/" >> $output_objdir/$libname.ver~
+                echo "local: *; };" >> $output_objdir/$libname.ver~
+                $CC -qmkshrobj $libobjs $deplibs $compiler_flags $wl-soname $wl$soname $wl-version-script $wl$output_objdir/$libname.ver -o $lib'
+	    fi
+	    ;;
+	  *)
+	    case `$CC -V 2>&1 | sed 5q` in
+	    *Sun\ C*)
+	      # Sun C++ 5.9
+	      _LT_TAGVAR(no_undefined_flag, $1)=' -zdefs'
+	      _LT_TAGVAR(archive_cmds, $1)='$CC -G$allow_undefined_flag -h$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags'
+	      _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -G$allow_undefined_flag -h$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-retain-symbols-file $wl$export_symbols'
+	      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-R$libdir'
+	      _LT_TAGVAR(whole_archive_flag_spec, $1)='$wl--whole-archive`new_convenience=; for conv in $convenience\"\"; do test -z \"$conv\" || new_convenience=\"$new_convenience,$conv\"; done; func_echo_all \"$new_convenience\"` $wl--no-whole-archive'
+	      _LT_TAGVAR(compiler_needs_object, $1)=yes
+
+	      # Not sure whether something based on
+	      # $CC $CFLAGS -v conftest.$objext -o libconftest$shared_ext 2>&1
+	      # would be better.
+	      output_verbose_link_cmd='func_echo_all'
+
+	      # Archives containing C++ object files must be created using
+	      # "CC -xar", where "CC" is the Sun C++ compiler.  This is
+	      # necessary to make sure instantiated templates are included
+	      # in the archive.
+	      _LT_TAGVAR(old_archive_cmds, $1)='$CC -xar -o $oldlib $oldobjs'
+	      ;;
+	    esac
+	    ;;
+	esac
+	;;
+
+      lynxos*)
+        # FIXME: insert proper C++ library support
+	_LT_TAGVAR(ld_shlibs, $1)=no
+	;;
+
+      m88k*)
+        # FIXME: insert proper C++ library support
+        _LT_TAGVAR(ld_shlibs, $1)=no
+	;;
+
+      mvs*)
+        case $cc_basename in
+          cxx*)
+	    # FIXME: insert proper C++ library support
+	    _LT_TAGVAR(ld_shlibs, $1)=no
+	    ;;
+	  *)
+	    # FIXME: insert proper C++ library support
+	    _LT_TAGVAR(ld_shlibs, $1)=no
+	    ;;
+	esac
+	;;
+
+      netbsd*)
+        if echo __ELF__ | $CC -E - | $GREP __ELF__ >/dev/null; then
+	  _LT_TAGVAR(archive_cmds, $1)='$LD -Bshareable  -o $lib $predep_objects $libobjs $deplibs $postdep_objects $linker_flags'
+	  wlarc=
+	  _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-R$libdir'
+	  _LT_TAGVAR(hardcode_direct, $1)=yes
+	  _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+	fi
+	# Workaround some broken pre-1.5 toolchains
+	output_verbose_link_cmd='$CC -shared $CFLAGS -v conftest.$objext 2>&1 | $GREP conftest.$objext | $SED -e "s:-lgcc -lc -lgcc::"'
+	;;
+
+      *nto* | *qnx*)
+        _LT_TAGVAR(ld_shlibs, $1)=yes
+	;;
+
+      openbsd* | bitrig*)
+	if test -f /usr/libexec/ld.so; then
+	  _LT_TAGVAR(hardcode_direct, $1)=yes
+	  _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+	  _LT_TAGVAR(hardcode_direct_absolute, $1)=yes
+	  _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -o $lib'
+	  _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-rpath,$libdir'
+	  if test -z "`echo __ELF__ | $CC -E - | grep __ELF__`"; then
+	    _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $pic_flag $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-retain-symbols-file,$export_symbols -o $lib'
+	    _LT_TAGVAR(export_dynamic_flag_spec, $1)='$wl-E'
+	    _LT_TAGVAR(whole_archive_flag_spec, $1)=$wlarc'--whole-archive$convenience '$wlarc'--no-whole-archive'
+	  fi
+	  output_verbose_link_cmd=func_echo_all
+	else
+	  _LT_TAGVAR(ld_shlibs, $1)=no
+	fi
+	;;
+
+      osf3* | osf4* | osf5*)
+        case $cc_basename in
+          KCC*)
+	    # Kuck and Associates, Inc. (KAI) C++ Compiler
+
+	    # KCC will only create a shared library if the output file
+	    # ends with ".so" (or ".sl" for HP-UX), so rename the library
+	    # to its proper name (with version) after linking.
+	    _LT_TAGVAR(archive_cmds, $1)='tempext=`echo $shared_ext | $SED -e '\''s/\([[^()0-9A-Za-z{}]]\)/\\\\\1/g'\''`; templib=`echo "$lib" | $SED -e "s/\$tempext\..*/.so/"`; $CC $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags --soname $soname -o \$templib; mv \$templib $lib'
+
+	    _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-rpath,$libdir'
+	    _LT_TAGVAR(hardcode_libdir_separator, $1)=:
+
+	    # Archives containing C++ object files must be created using
+	    # the KAI C++ compiler.
+	    case $host in
+	      osf3*) _LT_TAGVAR(old_archive_cmds, $1)='$CC -Bstatic -o $oldlib $oldobjs' ;;
+	      *) _LT_TAGVAR(old_archive_cmds, $1)='$CC -o $oldlib $oldobjs' ;;
+	    esac
+	    ;;
+          RCC*)
+	    # Rational C++ 2.4.1
+	    # FIXME: insert proper C++ library support
+	    _LT_TAGVAR(ld_shlibs, $1)=no
+	    ;;
+          cxx*)
+	    case $host in
+	      osf3*)
+	        _LT_TAGVAR(allow_undefined_flag, $1)=' $wl-expect_unresolved $wl\*'
+	        _LT_TAGVAR(archive_cmds, $1)='$CC -shared$allow_undefined_flag $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-soname $soname `test -n "$verstring" && func_echo_all "$wl-set_version $verstring"` -update_registry $output_objdir/so_locations -o $lib'
+	        _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-rpath $wl$libdir'
+		;;
+	      *)
+	        _LT_TAGVAR(allow_undefined_flag, $1)=' -expect_unresolved \*'
+	        _LT_TAGVAR(archive_cmds, $1)='$CC -shared$allow_undefined_flag $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -msym -soname $soname `test -n "$verstring" && func_echo_all "-set_version $verstring"` -update_registry $output_objdir/so_locations -o $lib'
+	        _LT_TAGVAR(archive_expsym_cmds, $1)='for i in `cat $export_symbols`; do printf "%s %s\\n" -exported_symbol "\$i" >> $lib.exp; done~
+                  echo "-hidden">> $lib.exp~
+                  $CC -shared$allow_undefined_flag $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -msym -soname $soname $wl-input $wl$lib.exp  `test -n "$verstring" && $ECHO "-set_version $verstring"` -update_registry $output_objdir/so_locations -o $lib~
+                  $RM $lib.exp'
+	        _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-rpath $libdir'
+		;;
+	    esac
+
+	    _LT_TAGVAR(hardcode_libdir_separator, $1)=:
+
+	    # Commands to make compiler produce verbose output that lists
+	    # what "hidden" libraries, object files and flags are used when
+	    # linking a shared library.
+	    #
+	    # There doesn't appear to be a way to prevent this compiler from
+	    # explicitly linking system object files so we need to strip them
+	    # from the output so that they don't get included in the library
+	    # dependencies.
+	    output_verbose_link_cmd='templist=`$CC -shared $CFLAGS -v conftest.$objext 2>&1 | $GREP "ld" | $GREP -v "ld:"`; templist=`func_echo_all "$templist" | $SED "s/\(^.*ld.*\)\( .*ld.*$\)/\1/"`; list= ; for z in $templist; do case $z in conftest.$objext) list="$list $z";; *.$objext);; *) list="$list $z";;esac; done; func_echo_all "$list"'
+	    ;;
+	  *)
+	    if test yes,no = "$GXX,$with_gnu_ld"; then
+	      _LT_TAGVAR(allow_undefined_flag, $1)=' $wl-expect_unresolved $wl\*'
+	      case $host in
+	        osf3*)
+	          _LT_TAGVAR(archive_cmds, $1)='$CC -shared -nostdlib $allow_undefined_flag $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-soname $wl$soname `test -n "$verstring" && func_echo_all "$wl-set_version $wl$verstring"` $wl-update_registry $wl$output_objdir/so_locations -o $lib'
+		  ;;
+	        *)
+	          _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag -nostdlib $allow_undefined_flag $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-msym $wl-soname $wl$soname `test -n "$verstring" && func_echo_all "$wl-set_version $wl$verstring"` $wl-update_registry $wl$output_objdir/so_locations -o $lib'
+		  ;;
+	      esac
+
+	      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-rpath $wl$libdir'
+	      _LT_TAGVAR(hardcode_libdir_separator, $1)=:
+
+	      # Commands to make compiler produce verbose output that lists
+	      # what "hidden" libraries, object files and flags are used when
+	      # linking a shared library.
+	      output_verbose_link_cmd='$CC -shared $CFLAGS -v conftest.$objext 2>&1 | $GREP -v "^Configured with:" | $GREP "\-L"'
+
+	    else
+	      # FIXME: insert proper C++ library support
+	      _LT_TAGVAR(ld_shlibs, $1)=no
+	    fi
+	    ;;
+        esac
+        ;;
+
+      psos*)
+        # FIXME: insert proper C++ library support
+        _LT_TAGVAR(ld_shlibs, $1)=no
+        ;;
+
+      sunos4*)
+        case $cc_basename in
+          CC*)
+	    # Sun C++ 4.x
+	    # FIXME: insert proper C++ library support
+	    _LT_TAGVAR(ld_shlibs, $1)=no
+	    ;;
+          lcc*)
+	    # Lucid
+	    # FIXME: insert proper C++ library support
+	    _LT_TAGVAR(ld_shlibs, $1)=no
+	    ;;
+          *)
+	    # FIXME: insert proper C++ library support
+	    _LT_TAGVAR(ld_shlibs, $1)=no
+	    ;;
+        esac
+        ;;
+
+      solaris*)
+        case $cc_basename in
+          CC* | sunCC*)
+	    # Sun C++ 4.2, 5.x and Centerline C++
+            _LT_TAGVAR(archive_cmds_need_lc,$1)=yes
+	    _LT_TAGVAR(no_undefined_flag, $1)=' -zdefs'
+	    _LT_TAGVAR(archive_cmds, $1)='$CC -G$allow_undefined_flag -h$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags'
+	    _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~
+              $CC -G$allow_undefined_flag $wl-M $wl$lib.exp -h$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags~$RM $lib.exp'
+
+	    _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-R$libdir'
+	    _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+	    case $host_os in
+	      solaris2.[[0-5]] | solaris2.[[0-5]].*) ;;
+	      *)
+		# The compiler driver will combine and reorder linker options,
+		# but understands '-z linker_flag'.
+	        # Supported since Solaris 2.6 (maybe 2.5.1?)
+		_LT_TAGVAR(whole_archive_flag_spec, $1)='-z allextract$convenience -z defaultextract'
+	        ;;
+	    esac
+	    _LT_TAGVAR(link_all_deplibs, $1)=yes
+
+	    output_verbose_link_cmd='func_echo_all'
+
+	    # Archives containing C++ object files must be created using
+	    # "CC -xar", where "CC" is the Sun C++ compiler.  This is
+	    # necessary to make sure instantiated templates are included
+	    # in the archive.
+	    _LT_TAGVAR(old_archive_cmds, $1)='$CC -xar -o $oldlib $oldobjs'
+	    ;;
+          gcx*)
+	    # Green Hills C++ Compiler
+	    _LT_TAGVAR(archive_cmds, $1)='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-h $wl$soname -o $lib'
+
+	    # The C++ compiler must be used to create the archive.
+	    _LT_TAGVAR(old_archive_cmds, $1)='$CC $LDFLAGS -archive -o $oldlib $oldobjs'
+	    ;;
+          *)
+	    # GNU C++ compiler with Solaris linker
+	    if test yes,no = "$GXX,$with_gnu_ld"; then
+	      _LT_TAGVAR(no_undefined_flag, $1)=' $wl-z ${wl}defs'
+	      if $CC --version | $GREP -v '^2\.7' > /dev/null; then
+	        _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-h $wl$soname -o $lib'
+	        _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~
+                  $CC -shared $pic_flag -nostdlib $wl-M $wl$lib.exp $wl-h $wl$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags~$RM $lib.exp'
+
+	        # Commands to make compiler produce verbose output that lists
+	        # what "hidden" libraries, object files and flags are used when
+	        # linking a shared library.
+	        output_verbose_link_cmd='$CC -shared $CFLAGS -v conftest.$objext 2>&1 | $GREP -v "^Configured with:" | $GREP "\-L"'
+	      else
+	        # g++ 2.7 appears to require '-G' NOT '-shared' on this
+	        # platform.
+	        _LT_TAGVAR(archive_cmds, $1)='$CC -G -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-h $wl$soname -o $lib'
+	        _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~
+                  $CC -G -nostdlib $wl-M $wl$lib.exp $wl-h $wl$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags~$RM $lib.exp'
+
+	        # Commands to make compiler produce verbose output that lists
+	        # what "hidden" libraries, object files and flags are used when
+	        # linking a shared library.
+	        output_verbose_link_cmd='$CC -G $CFLAGS -v conftest.$objext 2>&1 | $GREP -v "^Configured with:" | $GREP "\-L"'
+	      fi
+
+	      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-R $wl$libdir'
+	      case $host_os in
+		solaris2.[[0-5]] | solaris2.[[0-5]].*) ;;
+		*)
+		  _LT_TAGVAR(whole_archive_flag_spec, $1)='$wl-z ${wl}allextract$convenience $wl-z ${wl}defaultextract'
+		  ;;
+	      esac
+	    fi
+	    ;;
+        esac
+        ;;
+
+    sysv4*uw2* | sysv5OpenUNIX* | sysv5UnixWare7.[[01]].[[10]]* | unixware7* | sco3.2v5.0.[[024]]*)
+      _LT_TAGVAR(no_undefined_flag, $1)='$wl-z,text'
+      _LT_TAGVAR(archive_cmds_need_lc, $1)=no
+      _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+      runpath_var='LD_RUN_PATH'
+
+      case $cc_basename in
+        CC*)
+	  _LT_TAGVAR(archive_cmds, $1)='$CC -G $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	  _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -G $wl-Bexport:$export_symbols $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	  ;;
+	*)
+	  _LT_TAGVAR(archive_cmds, $1)='$CC -shared $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	  _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $wl-Bexport:$export_symbols $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	  ;;
+      esac
+      ;;
+
+      sysv5* | sco3.2v5* | sco5v6*)
+	# Note: We CANNOT use -z defs as we might desire, because we do not
+	# link with -lc, and that would cause any symbols used from libc to
+	# always be unresolved, which means just about no library would
+	# ever link correctly.  If we're not using GNU ld we use -z text
+	# though, which does catch some bad symbols but isn't as heavy-handed
+	# as -z defs.
+	_LT_TAGVAR(no_undefined_flag, $1)='$wl-z,text'
+	_LT_TAGVAR(allow_undefined_flag, $1)='$wl-z,nodefs'
+	_LT_TAGVAR(archive_cmds_need_lc, $1)=no
+	_LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+	_LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-R,$libdir'
+	_LT_TAGVAR(hardcode_libdir_separator, $1)=':'
+	_LT_TAGVAR(link_all_deplibs, $1)=yes
+	_LT_TAGVAR(export_dynamic_flag_spec, $1)='$wl-Bexport'
+	runpath_var='LD_RUN_PATH'
+
+	case $cc_basename in
+          CC*)
+	    _LT_TAGVAR(archive_cmds, $1)='$CC -G $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	    _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -G $wl-Bexport:$export_symbols $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	    _LT_TAGVAR(old_archive_cmds, $1)='$CC -Tprelink_objects $oldobjs~
+              '"$_LT_TAGVAR(old_archive_cmds, $1)"
+	    _LT_TAGVAR(reload_cmds, $1)='$CC -Tprelink_objects $reload_objs~
+              '"$_LT_TAGVAR(reload_cmds, $1)"
+	    ;;
+	  *)
+	    _LT_TAGVAR(archive_cmds, $1)='$CC -shared $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	    _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $wl-Bexport:$export_symbols $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	    ;;
+	esac
+      ;;
+
+      tandem*)
+        case $cc_basename in
+          NCC*)
+	    # NonStop-UX NCC 3.20
+	    # FIXME: insert proper C++ library support
+	    _LT_TAGVAR(ld_shlibs, $1)=no
+	    ;;
+          *)
+	    # FIXME: insert proper C++ library support
+	    _LT_TAGVAR(ld_shlibs, $1)=no
+	    ;;
+        esac
+        ;;
+
+      vxworks*)
+        # FIXME: insert proper C++ library support
+        _LT_TAGVAR(ld_shlibs, $1)=no
+        ;;
+
+      *)
+        # FIXME: insert proper C++ library support
+        _LT_TAGVAR(ld_shlibs, $1)=no
+        ;;
+    esac
+
+    AC_MSG_RESULT([$_LT_TAGVAR(ld_shlibs, $1)])
+    test no = "$_LT_TAGVAR(ld_shlibs, $1)" && can_build_shared=no
+
+    _LT_TAGVAR(GCC, $1)=$GXX
+    _LT_TAGVAR(LD, $1)=$LD
+
+    ## CAVEAT EMPTOR:
+    ## There is no encapsulation within the following macros, do not change
+    ## the running order or otherwise move them around unless you know exactly
+    ## what you are doing...
+    _LT_SYS_HIDDEN_LIBDEPS($1)
+    _LT_COMPILER_PIC($1)
+    _LT_COMPILER_C_O($1)
+    _LT_COMPILER_FILE_LOCKS($1)
+    _LT_LINKER_SHLIBS($1)
+    _LT_SYS_DYNAMIC_LINKER($1)
+    _LT_LINKER_HARDCODE_LIBPATH($1)
+
+    _LT_CONFIG($1)
+  fi # test -n "$compiler"
+
+  CC=$lt_save_CC
+  CFLAGS=$lt_save_CFLAGS
+  LDCXX=$LD
+  LD=$lt_save_LD
+  GCC=$lt_save_GCC
+  with_gnu_ld=$lt_save_with_gnu_ld
+  lt_cv_path_LDCXX=$lt_cv_path_LD
+  lt_cv_path_LD=$lt_save_path_LD
+  lt_cv_prog_gnu_ldcxx=$lt_cv_prog_gnu_ld
+  lt_cv_prog_gnu_ld=$lt_save_with_gnu_ld
+fi # test yes != "$_lt_caught_CXX_error"
+
+AC_LANG_POP
+])# _LT_LANG_CXX_CONFIG
+
+
+# _LT_FUNC_STRIPNAME_CNF
+# ----------------------
+# func_stripname_cnf prefix suffix name
+# strip PREFIX and SUFFIX off of NAME.
+# PREFIX and SUFFIX must not contain globbing or regex special
+# characters, hashes, percent signs, but SUFFIX may contain a leading
+# dot (in which case that matches only a dot).
+#
+# This function is identical to the (non-XSI) version of func_stripname,
+# except this one can be used by m4 code that may be executed by configure,
+# rather than the libtool script.
+m4_defun([_LT_FUNC_STRIPNAME_CNF],[dnl
+AC_REQUIRE([_LT_DECL_SED])
+AC_REQUIRE([_LT_PROG_ECHO_BACKSLASH])
+func_stripname_cnf ()
+{
+  case @S|@2 in
+  .*) func_stripname_result=`$ECHO "@S|@3" | $SED "s%^@S|@1%%; s%\\\\@S|@2\$%%"`;;
+  *)  func_stripname_result=`$ECHO "@S|@3" | $SED "s%^@S|@1%%; s%@S|@2\$%%"`;;
+  esac
+} # func_stripname_cnf
+])# _LT_FUNC_STRIPNAME_CNF
+
+
+# _LT_SYS_HIDDEN_LIBDEPS([TAGNAME])
+# ---------------------------------
+# Figure out "hidden" library dependencies from verbose
+# compiler output when linking a shared library.
+# Parse the compiler output and extract the necessary
+# objects, libraries and library flags.
+m4_defun([_LT_SYS_HIDDEN_LIBDEPS],
+[m4_require([_LT_FILEUTILS_DEFAULTS])dnl
+AC_REQUIRE([_LT_FUNC_STRIPNAME_CNF])dnl
+# Dependencies to place before and after the object being linked:
+_LT_TAGVAR(predep_objects, $1)=
+_LT_TAGVAR(postdep_objects, $1)=
+_LT_TAGVAR(predeps, $1)=
+_LT_TAGVAR(postdeps, $1)=
+_LT_TAGVAR(compiler_lib_search_path, $1)=
+
+dnl we can't use the lt_simple_compile_test_code here,
+dnl because it contains code intended for an executable,
+dnl not a library.  It's possible we should let each
+dnl tag define a new lt_????_link_test_code variable,
+dnl but it's only used here...
+m4_if([$1], [], [cat > conftest.$ac_ext <<_LT_EOF
+int a;
+void foo (void) { a = 0; }
+_LT_EOF
+], [$1], [CXX], [cat > conftest.$ac_ext <<_LT_EOF
+class Foo
+{
+public:
+  Foo (void) { a = 0; }
+private:
+  int a;
+};
+_LT_EOF
+], [$1], [F77], [cat > conftest.$ac_ext <<_LT_EOF
+      subroutine foo
+      implicit none
+      integer*4 a
+      a=0
+      return
+      end
+_LT_EOF
+], [$1], [FC], [cat > conftest.$ac_ext <<_LT_EOF
+      subroutine foo
+      implicit none
+      integer a
+      a=0
+      return
+      end
+_LT_EOF
+], [$1], [GCJ], [cat > conftest.$ac_ext <<_LT_EOF
+public class foo {
+  private int a;
+  public void bar (void) {
+    a = 0;
+  }
+};
+_LT_EOF
+], [$1], [GO], [cat > conftest.$ac_ext <<_LT_EOF
+package foo
+func foo() {
+}
+_LT_EOF
+])
+
+_lt_libdeps_save_CFLAGS=$CFLAGS
+case "$CC $CFLAGS " in #(
+*\ -flto*\ *) CFLAGS="$CFLAGS -fno-lto" ;;
+*\ -fwhopr*\ *) CFLAGS="$CFLAGS -fno-whopr" ;;
+*\ -fuse-linker-plugin*\ *) CFLAGS="$CFLAGS -fno-use-linker-plugin" ;;
+esac
+
+dnl Parse the compiler output and extract the necessary
+dnl objects, libraries and library flags.
+if AC_TRY_EVAL(ac_compile); then
+  # Parse the compiler output and extract the necessary
+  # objects, libraries and library flags.
+
+  # Sentinel used to keep track of whether or not we are before
+  # the conftest object file.
+  pre_test_object_deps_done=no
+
+  for p in `eval "$output_verbose_link_cmd"`; do
+    case $prev$p in
+
+    -L* | -R* | -l*)
+       # Some compilers place space between "-{L,R}" and the path.
+       # Remove the space.
+       if test x-L = "$p" ||
+          test x-R = "$p"; then
+	 prev=$p
+	 continue
+       fi
+
+       # Expand the sysroot to ease extracting the directories later.
+       if test -z "$prev"; then
+         case $p in
+         -L*) func_stripname_cnf '-L' '' "$p"; prev=-L; p=$func_stripname_result ;;
+         -R*) func_stripname_cnf '-R' '' "$p"; prev=-R; p=$func_stripname_result ;;
+         -l*) func_stripname_cnf '-l' '' "$p"; prev=-l; p=$func_stripname_result ;;
+         esac
+       fi
+       case $p in
+       =*) func_stripname_cnf '=' '' "$p"; p=$lt_sysroot$func_stripname_result ;;
+       esac
+       if test no = "$pre_test_object_deps_done"; then
+	 case $prev in
+	 -L | -R)
+	   # Internal compiler library paths should come after those
+	   # provided the user.  The postdeps already come after the
+	   # user supplied libs so there is no need to process them.
+	   if test -z "$_LT_TAGVAR(compiler_lib_search_path, $1)"; then
+	     _LT_TAGVAR(compiler_lib_search_path, $1)=$prev$p
+	   else
+	     _LT_TAGVAR(compiler_lib_search_path, $1)="${_LT_TAGVAR(compiler_lib_search_path, $1)} $prev$p"
+	   fi
+	   ;;
+	 # The "-l" case would never come before the object being
+	 # linked, so don't bother handling this case.
+	 esac
+       else
+	 if test -z "$_LT_TAGVAR(postdeps, $1)"; then
+	   _LT_TAGVAR(postdeps, $1)=$prev$p
+	 else
+	   _LT_TAGVAR(postdeps, $1)="${_LT_TAGVAR(postdeps, $1)} $prev$p"
+	 fi
+       fi
+       prev=
+       ;;
+
+    *.lto.$objext) ;; # Ignore GCC LTO objects
+    *.$objext)
+       # This assumes that the test object file only shows up
+       # once in the compiler output.
+       if test "$p" = "conftest.$objext"; then
+	 pre_test_object_deps_done=yes
+	 continue
+       fi
+
+       if test no = "$pre_test_object_deps_done"; then
+	 if test -z "$_LT_TAGVAR(predep_objects, $1)"; then
+	   _LT_TAGVAR(predep_objects, $1)=$p
+	 else
+	   _LT_TAGVAR(predep_objects, $1)="$_LT_TAGVAR(predep_objects, $1) $p"
+	 fi
+       else
+	 if test -z "$_LT_TAGVAR(postdep_objects, $1)"; then
+	   _LT_TAGVAR(postdep_objects, $1)=$p
+	 else
+	   _LT_TAGVAR(postdep_objects, $1)="$_LT_TAGVAR(postdep_objects, $1) $p"
+	 fi
+       fi
+       ;;
+
+    *) ;; # Ignore the rest.
+
+    esac
+  done
+
+  # Clean up.
+  rm -f a.out a.exe
+else
+  echo "libtool.m4: error: problem compiling $1 test program"
+fi
+
+$RM -f confest.$objext
+CFLAGS=$_lt_libdeps_save_CFLAGS
+
+# PORTME: override above test on systems where it is broken
+m4_if([$1], [CXX],
+[case $host_os in
+interix[[3-9]]*)
+  # Interix 3.5 installs completely hosed .la files for C++, so rather than
+  # hack all around it, let's just trust "g++" to DTRT.
+  _LT_TAGVAR(predep_objects,$1)=
+  _LT_TAGVAR(postdep_objects,$1)=
+  _LT_TAGVAR(postdeps,$1)=
+  ;;
+esac
+])
+
+case " $_LT_TAGVAR(postdeps, $1) " in
+*" -lc "*) _LT_TAGVAR(archive_cmds_need_lc, $1)=no ;;
+esac
+ _LT_TAGVAR(compiler_lib_search_dirs, $1)=
+if test -n "${_LT_TAGVAR(compiler_lib_search_path, $1)}"; then
+ _LT_TAGVAR(compiler_lib_search_dirs, $1)=`echo " ${_LT_TAGVAR(compiler_lib_search_path, $1)}" | $SED -e 's! -L! !g' -e 's!^ !!'`
+fi
+_LT_TAGDECL([], [compiler_lib_search_dirs], [1],
+    [The directories searched by this compiler when creating a shared library])
+_LT_TAGDECL([], [predep_objects], [1],
+    [Dependencies to place before and after the objects being linked to
+    create a shared library])
+_LT_TAGDECL([], [postdep_objects], [1])
+_LT_TAGDECL([], [predeps], [1])
+_LT_TAGDECL([], [postdeps], [1])
+_LT_TAGDECL([], [compiler_lib_search_path], [1],
+    [The library search path used internally by the compiler when linking
+    a shared library])
+])# _LT_SYS_HIDDEN_LIBDEPS
+
+
+# _LT_LANG_F77_CONFIG([TAG])
+# --------------------------
+# Ensure that the configuration variables for a Fortran 77 compiler are
+# suitably defined.  These variables are subsequently used by _LT_CONFIG
+# to write the compiler configuration to 'libtool'.
+m4_defun([_LT_LANG_F77_CONFIG],
+[AC_LANG_PUSH(Fortran 77)
+if test -z "$F77" || test no = "$F77"; then
+  _lt_disable_F77=yes
+fi
+
+_LT_TAGVAR(archive_cmds_need_lc, $1)=no
+_LT_TAGVAR(allow_undefined_flag, $1)=
+_LT_TAGVAR(always_export_symbols, $1)=no
+_LT_TAGVAR(archive_expsym_cmds, $1)=
+_LT_TAGVAR(export_dynamic_flag_spec, $1)=
+_LT_TAGVAR(hardcode_direct, $1)=no
+_LT_TAGVAR(hardcode_direct_absolute, $1)=no
+_LT_TAGVAR(hardcode_libdir_flag_spec, $1)=
+_LT_TAGVAR(hardcode_libdir_separator, $1)=
+_LT_TAGVAR(hardcode_minus_L, $1)=no
+_LT_TAGVAR(hardcode_automatic, $1)=no
+_LT_TAGVAR(inherit_rpath, $1)=no
+_LT_TAGVAR(module_cmds, $1)=
+_LT_TAGVAR(module_expsym_cmds, $1)=
+_LT_TAGVAR(link_all_deplibs, $1)=unknown
+_LT_TAGVAR(old_archive_cmds, $1)=$old_archive_cmds
+_LT_TAGVAR(reload_flag, $1)=$reload_flag
+_LT_TAGVAR(reload_cmds, $1)=$reload_cmds
+_LT_TAGVAR(no_undefined_flag, $1)=
+_LT_TAGVAR(whole_archive_flag_spec, $1)=
+_LT_TAGVAR(enable_shared_with_static_runtimes, $1)=no
+
+# Source file extension for f77 test sources.
+ac_ext=f
+
+# Object file extension for compiled f77 test sources.
+objext=o
+_LT_TAGVAR(objext, $1)=$objext
+
+# No sense in running all these tests if we already determined that
+# the F77 compiler isn't working.  Some variables (like enable_shared)
+# are currently assumed to apply to all compilers on this platform,
+# and will be corrupted by setting them based on a non-working compiler.
+if test yes != "$_lt_disable_F77"; then
+  # Code to be used in simple compile tests
+  lt_simple_compile_test_code="\
+      subroutine t
+      return
+      end
+"
+
+  # Code to be used in simple link tests
+  lt_simple_link_test_code="\
+      program t
+      end
+"
+
+  # ltmain only uses $CC for tagged configurations so make sure $CC is set.
+  _LT_TAG_COMPILER
+
+  # save warnings/boilerplate of simple test code
+  _LT_COMPILER_BOILERPLATE
+  _LT_LINKER_BOILERPLATE
+
+  # Allow CC to be a program name with arguments.
+  lt_save_CC=$CC
+  lt_save_GCC=$GCC
+  lt_save_CFLAGS=$CFLAGS
+  CC=${F77-"f77"}
+  CFLAGS=$FFLAGS
+  compiler=$CC
+  _LT_TAGVAR(compiler, $1)=$CC
+  _LT_CC_BASENAME([$compiler])
+  GCC=$G77
+  if test -n "$compiler"; then
+    AC_MSG_CHECKING([if libtool supports shared libraries])
+    AC_MSG_RESULT([$can_build_shared])
+
+    AC_MSG_CHECKING([whether to build shared libraries])
+    test no = "$can_build_shared" && enable_shared=no
+
+    # On AIX, shared libraries and static libraries use the same namespace, and
+    # are all built from PIC.
+    case $host_os in
+      aix3*)
+        test yes = "$enable_shared" && enable_static=no
+        if test -n "$RANLIB"; then
+          archive_cmds="$archive_cmds~\$RANLIB \$lib"
+          postinstall_cmds='$RANLIB $lib'
+        fi
+        ;;
+      aix[[4-9]]*)
+	if test ia64 != "$host_cpu"; then
+	  case $enable_shared,$with_aix_soname,$aix_use_runtimelinking in
+	  yes,aix,yes) ;;		# shared object as lib.so file only
+	  yes,svr4,*) ;;		# shared object as lib.so archive member only
+	  yes,*) enable_static=no ;;	# shared object in lib.a archive as well
+	  esac
+	fi
+        ;;
+    esac
+    AC_MSG_RESULT([$enable_shared])
+
+    AC_MSG_CHECKING([whether to build static libraries])
+    # Make sure either enable_shared or enable_static is yes.
+    test yes = "$enable_shared" || enable_static=yes
+    AC_MSG_RESULT([$enable_static])
+
+    _LT_TAGVAR(GCC, $1)=$G77
+    _LT_TAGVAR(LD, $1)=$LD
+
+    ## CAVEAT EMPTOR:
+    ## There is no encapsulation within the following macros, do not change
+    ## the running order or otherwise move them around unless you know exactly
+    ## what you are doing...
+    _LT_COMPILER_PIC($1)
+    _LT_COMPILER_C_O($1)
+    _LT_COMPILER_FILE_LOCKS($1)
+    _LT_LINKER_SHLIBS($1)
+    _LT_SYS_DYNAMIC_LINKER($1)
+    _LT_LINKER_HARDCODE_LIBPATH($1)
+
+    _LT_CONFIG($1)
+  fi # test -n "$compiler"
+
+  GCC=$lt_save_GCC
+  CC=$lt_save_CC
+  CFLAGS=$lt_save_CFLAGS
+fi # test yes != "$_lt_disable_F77"
+
+AC_LANG_POP
+])# _LT_LANG_F77_CONFIG
+
+
+# _LT_LANG_FC_CONFIG([TAG])
+# -------------------------
+# Ensure that the configuration variables for a Fortran compiler are
+# suitably defined.  These variables are subsequently used by _LT_CONFIG
+# to write the compiler configuration to 'libtool'.
+m4_defun([_LT_LANG_FC_CONFIG],
+[AC_LANG_PUSH(Fortran)
+
+if test -z "$FC" || test no = "$FC"; then
+  _lt_disable_FC=yes
+fi
+
+_LT_TAGVAR(archive_cmds_need_lc, $1)=no
+_LT_TAGVAR(allow_undefined_flag, $1)=
+_LT_TAGVAR(always_export_symbols, $1)=no
+_LT_TAGVAR(archive_expsym_cmds, $1)=
+_LT_TAGVAR(export_dynamic_flag_spec, $1)=
+_LT_TAGVAR(hardcode_direct, $1)=no
+_LT_TAGVAR(hardcode_direct_absolute, $1)=no
+_LT_TAGVAR(hardcode_libdir_flag_spec, $1)=
+_LT_TAGVAR(hardcode_libdir_separator, $1)=
+_LT_TAGVAR(hardcode_minus_L, $1)=no
+_LT_TAGVAR(hardcode_automatic, $1)=no
+_LT_TAGVAR(inherit_rpath, $1)=no
+_LT_TAGVAR(module_cmds, $1)=
+_LT_TAGVAR(module_expsym_cmds, $1)=
+_LT_TAGVAR(link_all_deplibs, $1)=unknown
+_LT_TAGVAR(old_archive_cmds, $1)=$old_archive_cmds
+_LT_TAGVAR(reload_flag, $1)=$reload_flag
+_LT_TAGVAR(reload_cmds, $1)=$reload_cmds
+_LT_TAGVAR(no_undefined_flag, $1)=
+_LT_TAGVAR(whole_archive_flag_spec, $1)=
+_LT_TAGVAR(enable_shared_with_static_runtimes, $1)=no
+
+# Source file extension for fc test sources.
+ac_ext=${ac_fc_srcext-f}
+
+# Object file extension for compiled fc test sources.
+objext=o
+_LT_TAGVAR(objext, $1)=$objext
+
+# No sense in running all these tests if we already determined that
+# the FC compiler isn't working.  Some variables (like enable_shared)
+# are currently assumed to apply to all compilers on this platform,
+# and will be corrupted by setting them based on a non-working compiler.
+if test yes != "$_lt_disable_FC"; then
+  # Code to be used in simple compile tests
+  lt_simple_compile_test_code="\
+      subroutine t
+      return
+      end
+"
+
+  # Code to be used in simple link tests
+  lt_simple_link_test_code="\
+      program t
+      end
+"
+
+  # ltmain only uses $CC for tagged configurations so make sure $CC is set.
+  _LT_TAG_COMPILER
+
+  # save warnings/boilerplate of simple test code
+  _LT_COMPILER_BOILERPLATE
+  _LT_LINKER_BOILERPLATE
+
+  # Allow CC to be a program name with arguments.
+  lt_save_CC=$CC
+  lt_save_GCC=$GCC
+  lt_save_CFLAGS=$CFLAGS
+  CC=${FC-"f95"}
+  CFLAGS=$FCFLAGS
+  compiler=$CC
+  GCC=$ac_cv_fc_compiler_gnu
+
+  _LT_TAGVAR(compiler, $1)=$CC
+  _LT_CC_BASENAME([$compiler])
+
+  if test -n "$compiler"; then
+    AC_MSG_CHECKING([if libtool supports shared libraries])
+    AC_MSG_RESULT([$can_build_shared])
+
+    AC_MSG_CHECKING([whether to build shared libraries])
+    test no = "$can_build_shared" && enable_shared=no
+
+    # On AIX, shared libraries and static libraries use the same namespace, and
+    # are all built from PIC.
+    case $host_os in
+      aix3*)
+        test yes = "$enable_shared" && enable_static=no
+        if test -n "$RANLIB"; then
+          archive_cmds="$archive_cmds~\$RANLIB \$lib"
+          postinstall_cmds='$RANLIB $lib'
+        fi
+        ;;
+      aix[[4-9]]*)
+	if test ia64 != "$host_cpu"; then
+	  case $enable_shared,$with_aix_soname,$aix_use_runtimelinking in
+	  yes,aix,yes) ;;		# shared object as lib.so file only
+	  yes,svr4,*) ;;		# shared object as lib.so archive member only
+	  yes,*) enable_static=no ;;	# shared object in lib.a archive as well
+	  esac
+	fi
+        ;;
+    esac
+    AC_MSG_RESULT([$enable_shared])
+
+    AC_MSG_CHECKING([whether to build static libraries])
+    # Make sure either enable_shared or enable_static is yes.
+    test yes = "$enable_shared" || enable_static=yes
+    AC_MSG_RESULT([$enable_static])
+
+    _LT_TAGVAR(GCC, $1)=$ac_cv_fc_compiler_gnu
+    _LT_TAGVAR(LD, $1)=$LD
+
+    ## CAVEAT EMPTOR:
+    ## There is no encapsulation within the following macros, do not change
+    ## the running order or otherwise move them around unless you know exactly
+    ## what you are doing...
+    _LT_SYS_HIDDEN_LIBDEPS($1)
+    _LT_COMPILER_PIC($1)
+    _LT_COMPILER_C_O($1)
+    _LT_COMPILER_FILE_LOCKS($1)
+    _LT_LINKER_SHLIBS($1)
+    _LT_SYS_DYNAMIC_LINKER($1)
+    _LT_LINKER_HARDCODE_LIBPATH($1)
+
+    _LT_CONFIG($1)
+  fi # test -n "$compiler"
+
+  GCC=$lt_save_GCC
+  CC=$lt_save_CC
+  CFLAGS=$lt_save_CFLAGS
+fi # test yes != "$_lt_disable_FC"
+
+AC_LANG_POP
+])# _LT_LANG_FC_CONFIG
+
+
+# _LT_LANG_GCJ_CONFIG([TAG])
+# --------------------------
+# Ensure that the configuration variables for the GNU Java Compiler compiler
+# are suitably defined.  These variables are subsequently used by _LT_CONFIG
+# to write the compiler configuration to 'libtool'.
+m4_defun([_LT_LANG_GCJ_CONFIG],
+[AC_REQUIRE([LT_PROG_GCJ])dnl
+AC_LANG_SAVE
+
+# Source file extension for Java test sources.
+ac_ext=java
+
+# Object file extension for compiled Java test sources.
+objext=o
+_LT_TAGVAR(objext, $1)=$objext
+
+# Code to be used in simple compile tests
+lt_simple_compile_test_code="class foo {}"
+
+# Code to be used in simple link tests
+lt_simple_link_test_code='public class conftest { public static void main(String[[]] argv) {}; }'
+
+# ltmain only uses $CC for tagged configurations so make sure $CC is set.
+_LT_TAG_COMPILER
+
+# save warnings/boilerplate of simple test code
+_LT_COMPILER_BOILERPLATE
+_LT_LINKER_BOILERPLATE
+
+# Allow CC to be a program name with arguments.
+lt_save_CC=$CC
+lt_save_CFLAGS=$CFLAGS
+lt_save_GCC=$GCC
+GCC=yes
+CC=${GCJ-"gcj"}
+CFLAGS=$GCJFLAGS
+compiler=$CC
+_LT_TAGVAR(compiler, $1)=$CC
+_LT_TAGVAR(LD, $1)=$LD
+_LT_CC_BASENAME([$compiler])
+
+# GCJ did not exist at the time GCC didn't implicitly link libc in.
+_LT_TAGVAR(archive_cmds_need_lc, $1)=no
+
+_LT_TAGVAR(old_archive_cmds, $1)=$old_archive_cmds
+_LT_TAGVAR(reload_flag, $1)=$reload_flag
+_LT_TAGVAR(reload_cmds, $1)=$reload_cmds
+
+if test -n "$compiler"; then
+  _LT_COMPILER_NO_RTTI($1)
+  _LT_COMPILER_PIC($1)
+  _LT_COMPILER_C_O($1)
+  _LT_COMPILER_FILE_LOCKS($1)
+  _LT_LINKER_SHLIBS($1)
+  _LT_LINKER_HARDCODE_LIBPATH($1)
+
+  _LT_CONFIG($1)
+fi
+
+AC_LANG_RESTORE
+
+GCC=$lt_save_GCC
+CC=$lt_save_CC
+CFLAGS=$lt_save_CFLAGS
+])# _LT_LANG_GCJ_CONFIG
+
+
+# _LT_LANG_GO_CONFIG([TAG])
+# --------------------------
+# Ensure that the configuration variables for the GNU Go compiler
+# are suitably defined.  These variables are subsequently used by _LT_CONFIG
+# to write the compiler configuration to 'libtool'.
+m4_defun([_LT_LANG_GO_CONFIG],
+[AC_REQUIRE([LT_PROG_GO])dnl
+AC_LANG_SAVE
+
+# Source file extension for Go test sources.
+ac_ext=go
+
+# Object file extension for compiled Go test sources.
+objext=o
+_LT_TAGVAR(objext, $1)=$objext
+
+# Code to be used in simple compile tests
+lt_simple_compile_test_code="package main; func main() { }"
+
+# Code to be used in simple link tests
+lt_simple_link_test_code='package main; func main() { }'
+
+# ltmain only uses $CC for tagged configurations so make sure $CC is set.
+_LT_TAG_COMPILER
+
+# save warnings/boilerplate of simple test code
+_LT_COMPILER_BOILERPLATE
+_LT_LINKER_BOILERPLATE
+
+# Allow CC to be a program name with arguments.
+lt_save_CC=$CC
+lt_save_CFLAGS=$CFLAGS
+lt_save_GCC=$GCC
+GCC=yes
+CC=${GOC-"gccgo"}
+CFLAGS=$GOFLAGS
+compiler=$CC
+_LT_TAGVAR(compiler, $1)=$CC
+_LT_TAGVAR(LD, $1)=$LD
+_LT_CC_BASENAME([$compiler])
+
+# Go did not exist at the time GCC didn't implicitly link libc in.
+_LT_TAGVAR(archive_cmds_need_lc, $1)=no
+
+_LT_TAGVAR(old_archive_cmds, $1)=$old_archive_cmds
+_LT_TAGVAR(reload_flag, $1)=$reload_flag
+_LT_TAGVAR(reload_cmds, $1)=$reload_cmds
+
+if test -n "$compiler"; then
+  _LT_COMPILER_NO_RTTI($1)
+  _LT_COMPILER_PIC($1)
+  _LT_COMPILER_C_O($1)
+  _LT_COMPILER_FILE_LOCKS($1)
+  _LT_LINKER_SHLIBS($1)
+  _LT_LINKER_HARDCODE_LIBPATH($1)
+
+  _LT_CONFIG($1)
+fi
+
+AC_LANG_RESTORE
+
+GCC=$lt_save_GCC
+CC=$lt_save_CC
+CFLAGS=$lt_save_CFLAGS
+])# _LT_LANG_GO_CONFIG
+
+
+# _LT_LANG_RC_CONFIG([TAG])
+# -------------------------
+# Ensure that the configuration variables for the Windows resource compiler
+# are suitably defined.  These variables are subsequently used by _LT_CONFIG
+# to write the compiler configuration to 'libtool'.
+m4_defun([_LT_LANG_RC_CONFIG],
+[AC_REQUIRE([LT_PROG_RC])dnl
+AC_LANG_SAVE
+
+# Source file extension for RC test sources.
+ac_ext=rc
+
+# Object file extension for compiled RC test sources.
+objext=o
+_LT_TAGVAR(objext, $1)=$objext
+
+# Code to be used in simple compile tests
+lt_simple_compile_test_code='sample MENU { MENUITEM "&Soup", 100, CHECKED }'
+
+# Code to be used in simple link tests
+lt_simple_link_test_code=$lt_simple_compile_test_code
+
+# ltmain only uses $CC for tagged configurations so make sure $CC is set.
+_LT_TAG_COMPILER
+
+# save warnings/boilerplate of simple test code
+_LT_COMPILER_BOILERPLATE
+_LT_LINKER_BOILERPLATE
+
+# Allow CC to be a program name with arguments.
+lt_save_CC=$CC
+lt_save_CFLAGS=$CFLAGS
+lt_save_GCC=$GCC
+GCC=
+CC=${RC-"windres"}
+CFLAGS=
+compiler=$CC
+_LT_TAGVAR(compiler, $1)=$CC
+_LT_CC_BASENAME([$compiler])
+_LT_TAGVAR(lt_cv_prog_compiler_c_o, $1)=yes
+
+if test -n "$compiler"; then
+  :
+  _LT_CONFIG($1)
+fi
+
+GCC=$lt_save_GCC
+AC_LANG_RESTORE
+CC=$lt_save_CC
+CFLAGS=$lt_save_CFLAGS
+])# _LT_LANG_RC_CONFIG
+
+
+# LT_PROG_GCJ
+# -----------
+AC_DEFUN([LT_PROG_GCJ],
+[m4_ifdef([AC_PROG_GCJ], [AC_PROG_GCJ],
+  [m4_ifdef([A][M_PROG_GCJ], [A][M_PROG_GCJ],
+    [AC_CHECK_TOOL(GCJ, gcj,)
+      test set = "${GCJFLAGS+set}" || GCJFLAGS="-g -O2"
+      AC_SUBST(GCJFLAGS)])])[]dnl
+])
+
+# Old name:
+AU_ALIAS([LT_AC_PROG_GCJ], [LT_PROG_GCJ])
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([LT_AC_PROG_GCJ], [])
+
+
+# LT_PROG_GO
+# ----------
+AC_DEFUN([LT_PROG_GO],
+[AC_CHECK_TOOL(GOC, gccgo,)
+])
+
+
+# LT_PROG_RC
+# ----------
+AC_DEFUN([LT_PROG_RC],
+[AC_CHECK_TOOL(RC, windres,)
+])
+
+# Old name:
+AU_ALIAS([LT_AC_PROG_RC], [LT_PROG_RC])
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([LT_AC_PROG_RC], [])
+
+
+# _LT_DECL_EGREP
+# --------------
+# If we don't have a new enough Autoconf to choose the best grep
+# available, choose the one first in the user's PATH.
+m4_defun([_LT_DECL_EGREP],
+[AC_REQUIRE([AC_PROG_EGREP])dnl
+AC_REQUIRE([AC_PROG_FGREP])dnl
+test -z "$GREP" && GREP=grep
+_LT_DECL([], [GREP], [1], [A grep program that handles long lines])
+_LT_DECL([], [EGREP], [1], [An ERE matcher])
+_LT_DECL([], [FGREP], [1], [A literal string matcher])
+dnl Non-bleeding-edge autoconf doesn't subst GREP, so do it here too
+AC_SUBST([GREP])
+])
+
+
+# _LT_DECL_OBJDUMP
+# --------------
+# If we don't have a new enough Autoconf to choose the best objdump
+# available, choose the one first in the user's PATH.
+m4_defun([_LT_DECL_OBJDUMP],
+[AC_CHECK_TOOL(OBJDUMP, objdump, false)
+test -z "$OBJDUMP" && OBJDUMP=objdump
+_LT_DECL([], [OBJDUMP], [1], [An object symbol dumper])
+AC_SUBST([OBJDUMP])
+])
+
+# _LT_DECL_DLLTOOL
+# ----------------
+# Ensure DLLTOOL variable is set.
+m4_defun([_LT_DECL_DLLTOOL],
+[AC_CHECK_TOOL(DLLTOOL, dlltool, false)
+test -z "$DLLTOOL" && DLLTOOL=dlltool
+_LT_DECL([], [DLLTOOL], [1], [DLL creation program])
+AC_SUBST([DLLTOOL])
+])
+
+# _LT_DECL_SED
+# ------------
+# Check for a fully-functional sed program, that truncates
+# as few characters as possible.  Prefer GNU sed if found.
+m4_defun([_LT_DECL_SED],
+[AC_PROG_SED
+test -z "$SED" && SED=sed
+Xsed="$SED -e 1s/^X//"
+_LT_DECL([], [SED], [1], [A sed program that does not truncate output])
+_LT_DECL([], [Xsed], ["\$SED -e 1s/^X//"],
+    [Sed that helps us avoid accidentally triggering echo(1) options like -n])
+])# _LT_DECL_SED
+
+m4_ifndef([AC_PROG_SED], [
+# NOTE: This macro has been submitted for inclusion into   #
+#  GNU Autoconf as AC_PROG_SED.  When it is available in   #
+#  a released version of Autoconf we should remove this    #
+#  macro and use it instead.                               #
+
+m4_defun([AC_PROG_SED],
+[AC_MSG_CHECKING([for a sed that does not truncate output])
+AC_CACHE_VAL(lt_cv_path_SED,
+[# Loop through the user's path and test for sed and gsed.
+# Then use that list of sed's as ones to test for truncation.
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for lt_ac_prog in sed gsed; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
+      if $as_executable_p "$as_dir/$lt_ac_prog$ac_exec_ext"; then
+        lt_ac_sed_list="$lt_ac_sed_list $as_dir/$lt_ac_prog$ac_exec_ext"
+      fi
+    done
+  done
+done
+IFS=$as_save_IFS
+lt_ac_max=0
+lt_ac_count=0
+# Add /usr/xpg4/bin/sed as it is typically found on Solaris
+# along with /bin/sed that truncates output.
+for lt_ac_sed in $lt_ac_sed_list /usr/xpg4/bin/sed; do
+  test ! -f "$lt_ac_sed" && continue
+  cat /dev/null > conftest.in
+  lt_ac_count=0
+  echo $ECHO_N "0123456789$ECHO_C" >conftest.in
+  # Check for GNU sed and select it if it is found.
+  if "$lt_ac_sed" --version 2>&1 < /dev/null | grep 'GNU' > /dev/null; then
+    lt_cv_path_SED=$lt_ac_sed
+    break
+  fi
+  while true; do
+    cat conftest.in conftest.in >conftest.tmp
+    mv conftest.tmp conftest.in
+    cp conftest.in conftest.nl
+    echo >>conftest.nl
+    $lt_ac_sed -e 's/a$//' < conftest.nl >conftest.out || break
+    cmp -s conftest.out conftest.nl || break
+    # 10000 chars as input seems more than enough
+    test 10 -lt "$lt_ac_count" && break
+    lt_ac_count=`expr $lt_ac_count + 1`
+    if test "$lt_ac_count" -gt "$lt_ac_max"; then
+      lt_ac_max=$lt_ac_count
+      lt_cv_path_SED=$lt_ac_sed
+    fi
+  done
+done
+])
+SED=$lt_cv_path_SED
+AC_SUBST([SED])
+AC_MSG_RESULT([$SED])
+])#AC_PROG_SED
+])#m4_ifndef
+
+# Old name:
+AU_ALIAS([LT_AC_PROG_SED], [AC_PROG_SED])
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([LT_AC_PROG_SED], [])
+
+
+# _LT_CHECK_SHELL_FEATURES
+# ------------------------
+# Find out whether the shell is Bourne or XSI compatible,
+# or has some other useful features.
+m4_defun([_LT_CHECK_SHELL_FEATURES],
+[if ( (MAIL=60; unset MAIL) || exit) >/dev/null 2>&1; then
+  lt_unset=unset
+else
+  lt_unset=false
+fi
+_LT_DECL([], [lt_unset], [0], [whether the shell understands "unset"])dnl
+
+# test EBCDIC or ASCII
+case `echo X|tr X '\101'` in
+ A) # ASCII based system
+    # \n is not interpreted correctly by Solaris 8 /usr/ucb/tr
+  lt_SP2NL='tr \040 \012'
+  lt_NL2SP='tr \015\012 \040\040'
+  ;;
+ *) # EBCDIC based system
+  lt_SP2NL='tr \100 \n'
+  lt_NL2SP='tr \r\n \100\100'
+  ;;
+esac
+_LT_DECL([SP2NL], [lt_SP2NL], [1], [turn spaces into newlines])dnl
+_LT_DECL([NL2SP], [lt_NL2SP], [1], [turn newlines into spaces])dnl
+])# _LT_CHECK_SHELL_FEATURES
+
+
+# _LT_PATH_CONVERSION_FUNCTIONS
+# -----------------------------
+# Determine what file name conversion functions should be used by
+# func_to_host_file (and, implicitly, by func_to_host_path).  These are needed
+# for certain cross-compile configurations and native mingw.
+m4_defun([_LT_PATH_CONVERSION_FUNCTIONS],
+[AC_REQUIRE([AC_CANONICAL_HOST])dnl
+AC_REQUIRE([AC_CANONICAL_BUILD])dnl
+AC_MSG_CHECKING([how to convert $build file names to $host format])
+AC_CACHE_VAL(lt_cv_to_host_file_cmd,
+[case $host in
+  *-*-mingw* )
+    case $build in
+      *-*-mingw* ) # actually msys
+        lt_cv_to_host_file_cmd=func_convert_file_msys_to_w32
+        ;;
+      *-*-cygwin* )
+        lt_cv_to_host_file_cmd=func_convert_file_cygwin_to_w32
+        ;;
+      * ) # otherwise, assume *nix
+        lt_cv_to_host_file_cmd=func_convert_file_nix_to_w32
+        ;;
+    esac
+    ;;
+  *-*-cygwin* )
+    case $build in
+      *-*-mingw* ) # actually msys
+        lt_cv_to_host_file_cmd=func_convert_file_msys_to_cygwin
+        ;;
+      *-*-cygwin* )
+        lt_cv_to_host_file_cmd=func_convert_file_noop
+        ;;
+      * ) # otherwise, assume *nix
+        lt_cv_to_host_file_cmd=func_convert_file_nix_to_cygwin
+        ;;
+    esac
+    ;;
+  * ) # unhandled hosts (and "normal" native builds)
+    lt_cv_to_host_file_cmd=func_convert_file_noop
+    ;;
+esac
+])
+to_host_file_cmd=$lt_cv_to_host_file_cmd
+AC_MSG_RESULT([$lt_cv_to_host_file_cmd])
+_LT_DECL([to_host_file_cmd], [lt_cv_to_host_file_cmd],
+         [0], [convert $build file names to $host format])dnl
+
+AC_MSG_CHECKING([how to convert $build file names to toolchain format])
+AC_CACHE_VAL(lt_cv_to_tool_file_cmd,
+[#assume ordinary cross tools, or native build.
+lt_cv_to_tool_file_cmd=func_convert_file_noop
+case $host in
+  *-*-mingw* )
+    case $build in
+      *-*-mingw* ) # actually msys
+        lt_cv_to_tool_file_cmd=func_convert_file_msys_to_w32
+        ;;
+    esac
+    ;;
+esac
+])
+to_tool_file_cmd=$lt_cv_to_tool_file_cmd
+AC_MSG_RESULT([$lt_cv_to_tool_file_cmd])
+_LT_DECL([to_tool_file_cmd], [lt_cv_to_tool_file_cmd],
+         [0], [convert $build files to toolchain format])dnl
+])# _LT_PATH_CONVERSION_FUNCTIONS
+
+# Helper functions for option handling.                    -*- Autoconf -*-
+#
+#   Copyright (C) 2004-2005, 2007-2009, 2011-2015 Free Software
+#   Foundation, Inc.
+#   Written by Gary V. Vaughan, 2004
+#
+# This file is free software; the Free Software Foundation gives
+# unlimited permission to copy and/or distribute it, with or without
+# modifications, as long as this notice is preserved.
+
+# serial 8 ltoptions.m4
+
+# This is to help aclocal find these macros, as it can't see m4_define.
+AC_DEFUN([LTOPTIONS_VERSION], [m4_if([1])])
+
+
+# _LT_MANGLE_OPTION(MACRO-NAME, OPTION-NAME)
+# ------------------------------------------
+m4_define([_LT_MANGLE_OPTION],
+[[_LT_OPTION_]m4_bpatsubst($1__$2, [[^a-zA-Z0-9_]], [_])])
+
+
+# _LT_SET_OPTION(MACRO-NAME, OPTION-NAME)
+# ---------------------------------------
+# Set option OPTION-NAME for macro MACRO-NAME, and if there is a
+# matching handler defined, dispatch to it.  Other OPTION-NAMEs are
+# saved as a flag.
+m4_define([_LT_SET_OPTION],
+[m4_define(_LT_MANGLE_OPTION([$1], [$2]))dnl
+m4_ifdef(_LT_MANGLE_DEFUN([$1], [$2]),
+        _LT_MANGLE_DEFUN([$1], [$2]),
+    [m4_warning([Unknown $1 option '$2'])])[]dnl
+])
+
+
+# _LT_IF_OPTION(MACRO-NAME, OPTION-NAME, IF-SET, [IF-NOT-SET])
+# ------------------------------------------------------------
+# Execute IF-SET if OPTION is set, IF-NOT-SET otherwise.
+m4_define([_LT_IF_OPTION],
+[m4_ifdef(_LT_MANGLE_OPTION([$1], [$2]), [$3], [$4])])
+
+
+# _LT_UNLESS_OPTIONS(MACRO-NAME, OPTION-LIST, IF-NOT-SET)
+# -------------------------------------------------------
+# Execute IF-NOT-SET unless all options in OPTION-LIST for MACRO-NAME
+# are set.
+m4_define([_LT_UNLESS_OPTIONS],
+[m4_foreach([_LT_Option], m4_split(m4_normalize([$2])),
+	    [m4_ifdef(_LT_MANGLE_OPTION([$1], _LT_Option),
+		      [m4_define([$0_found])])])[]dnl
+m4_ifdef([$0_found], [m4_undefine([$0_found])], [$3
+])[]dnl
+])
+
+
+# _LT_SET_OPTIONS(MACRO-NAME, OPTION-LIST)
+# ----------------------------------------
+# OPTION-LIST is a space-separated list of Libtool options associated
+# with MACRO-NAME.  If any OPTION has a matching handler declared with
+# LT_OPTION_DEFINE, dispatch to that macro; otherwise complain about
+# the unknown option and exit.
+m4_defun([_LT_SET_OPTIONS],
+[# Set options
+m4_foreach([_LT_Option], m4_split(m4_normalize([$2])),
+    [_LT_SET_OPTION([$1], _LT_Option)])
+
+m4_if([$1],[LT_INIT],[
+  dnl
+  dnl Simply set some default values (i.e off) if boolean options were not
+  dnl specified:
+  _LT_UNLESS_OPTIONS([LT_INIT], [dlopen], [enable_dlopen=no
+  ])
+  _LT_UNLESS_OPTIONS([LT_INIT], [win32-dll], [enable_win32_dll=no
+  ])
+  dnl
+  dnl If no reference was made to various pairs of opposing options, then
+  dnl we run the default mode handler for the pair.  For example, if neither
+  dnl 'shared' nor 'disable-shared' was passed, we enable building of shared
+  dnl archives by default:
+  _LT_UNLESS_OPTIONS([LT_INIT], [shared disable-shared], [_LT_ENABLE_SHARED])
+  _LT_UNLESS_OPTIONS([LT_INIT], [static disable-static], [_LT_ENABLE_STATIC])
+  _LT_UNLESS_OPTIONS([LT_INIT], [pic-only no-pic], [_LT_WITH_PIC])
+  _LT_UNLESS_OPTIONS([LT_INIT], [fast-install disable-fast-install],
+		   [_LT_ENABLE_FAST_INSTALL])
+  _LT_UNLESS_OPTIONS([LT_INIT], [aix-soname=aix aix-soname=both aix-soname=svr4],
+		   [_LT_WITH_AIX_SONAME([aix])])
+  ])
+])# _LT_SET_OPTIONS
+
+
+
+# _LT_MANGLE_DEFUN(MACRO-NAME, OPTION-NAME)
+# -----------------------------------------
+m4_define([_LT_MANGLE_DEFUN],
+[[_LT_OPTION_DEFUN_]m4_bpatsubst(m4_toupper([$1__$2]), [[^A-Z0-9_]], [_])])
+
+
+# LT_OPTION_DEFINE(MACRO-NAME, OPTION-NAME, CODE)
+# -----------------------------------------------
+m4_define([LT_OPTION_DEFINE],
+[m4_define(_LT_MANGLE_DEFUN([$1], [$2]), [$3])[]dnl
+])# LT_OPTION_DEFINE
+
+
+# dlopen
+# ------
+LT_OPTION_DEFINE([LT_INIT], [dlopen], [enable_dlopen=yes
+])
+
+AU_DEFUN([AC_LIBTOOL_DLOPEN],
+[_LT_SET_OPTION([LT_INIT], [dlopen])
+AC_DIAGNOSE([obsolete],
+[$0: Remove this warning and the call to _LT_SET_OPTION when you
+put the 'dlopen' option into LT_INIT's first parameter.])
+])
+
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([AC_LIBTOOL_DLOPEN], [])
+
+
+# win32-dll
+# ---------
+# Declare package support for building win32 dll's.
+LT_OPTION_DEFINE([LT_INIT], [win32-dll],
+[enable_win32_dll=yes
+
+case $host in
+*-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-cegcc*)
+  AC_CHECK_TOOL(AS, as, false)
+  AC_CHECK_TOOL(DLLTOOL, dlltool, false)
+  AC_CHECK_TOOL(OBJDUMP, objdump, false)
+  ;;
+esac
+
+test -z "$AS" && AS=as
+_LT_DECL([], [AS],      [1], [Assembler program])dnl
+
+test -z "$DLLTOOL" && DLLTOOL=dlltool
+_LT_DECL([], [DLLTOOL], [1], [DLL creation program])dnl
+
+test -z "$OBJDUMP" && OBJDUMP=objdump
+_LT_DECL([], [OBJDUMP], [1], [Object dumper program])dnl
+])# win32-dll
+
+AU_DEFUN([AC_LIBTOOL_WIN32_DLL],
+[AC_REQUIRE([AC_CANONICAL_HOST])dnl
+_LT_SET_OPTION([LT_INIT], [win32-dll])
+AC_DIAGNOSE([obsolete],
+[$0: Remove this warning and the call to _LT_SET_OPTION when you
+put the 'win32-dll' option into LT_INIT's first parameter.])
+])
+
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([AC_LIBTOOL_WIN32_DLL], [])
+
+
+# _LT_ENABLE_SHARED([DEFAULT])
+# ----------------------------
+# implement the --enable-shared flag, and supports the 'shared' and
+# 'disable-shared' LT_INIT options.
+# DEFAULT is either 'yes' or 'no'.  If omitted, it defaults to 'yes'.
+m4_define([_LT_ENABLE_SHARED],
+[m4_define([_LT_ENABLE_SHARED_DEFAULT], [m4_if($1, no, no, yes)])dnl
+AC_ARG_ENABLE([shared],
+    [AS_HELP_STRING([--enable-shared@<:@=PKGS@:>@],
+	[build shared libraries @<:@default=]_LT_ENABLE_SHARED_DEFAULT[@:>@])],
+    [p=${PACKAGE-default}
+    case $enableval in
+    yes) enable_shared=yes ;;
+    no) enable_shared=no ;;
+    *)
+      enable_shared=no
+      # Look at the argument we got.  We use all the common list separators.
+      lt_save_ifs=$IFS; IFS=$IFS$PATH_SEPARATOR,
+      for pkg in $enableval; do
+	IFS=$lt_save_ifs
+	if test "X$pkg" = "X$p"; then
+	  enable_shared=yes
+	fi
+      done
+      IFS=$lt_save_ifs
+      ;;
+    esac],
+    [enable_shared=]_LT_ENABLE_SHARED_DEFAULT)
+
+    _LT_DECL([build_libtool_libs], [enable_shared], [0],
+	[Whether or not to build shared libraries])
+])# _LT_ENABLE_SHARED
+
+LT_OPTION_DEFINE([LT_INIT], [shared], [_LT_ENABLE_SHARED([yes])])
+LT_OPTION_DEFINE([LT_INIT], [disable-shared], [_LT_ENABLE_SHARED([no])])
+
+# Old names:
+AC_DEFUN([AC_ENABLE_SHARED],
+[_LT_SET_OPTION([LT_INIT], m4_if([$1], [no], [disable-])[shared])
+])
+
+AC_DEFUN([AC_DISABLE_SHARED],
+[_LT_SET_OPTION([LT_INIT], [disable-shared])
+])
+
+AU_DEFUN([AM_ENABLE_SHARED], [AC_ENABLE_SHARED($@)])
+AU_DEFUN([AM_DISABLE_SHARED], [AC_DISABLE_SHARED($@)])
+
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([AM_ENABLE_SHARED], [])
+dnl AC_DEFUN([AM_DISABLE_SHARED], [])
+
+
+
+# _LT_ENABLE_STATIC([DEFAULT])
+# ----------------------------
+# implement the --enable-static flag, and support the 'static' and
+# 'disable-static' LT_INIT options.
+# DEFAULT is either 'yes' or 'no'.  If omitted, it defaults to 'yes'.
+m4_define([_LT_ENABLE_STATIC],
+[m4_define([_LT_ENABLE_STATIC_DEFAULT], [m4_if($1, no, no, yes)])dnl
+AC_ARG_ENABLE([static],
+    [AS_HELP_STRING([--enable-static@<:@=PKGS@:>@],
+	[build static libraries @<:@default=]_LT_ENABLE_STATIC_DEFAULT[@:>@])],
+    [p=${PACKAGE-default}
+    case $enableval in
+    yes) enable_static=yes ;;
+    no) enable_static=no ;;
+    *)
+     enable_static=no
+      # Look at the argument we got.  We use all the common list separators.
+      lt_save_ifs=$IFS; IFS=$IFS$PATH_SEPARATOR,
+      for pkg in $enableval; do
+	IFS=$lt_save_ifs
+	if test "X$pkg" = "X$p"; then
+	  enable_static=yes
+	fi
+      done
+      IFS=$lt_save_ifs
+      ;;
+    esac],
+    [enable_static=]_LT_ENABLE_STATIC_DEFAULT)
+
+    _LT_DECL([build_old_libs], [enable_static], [0],
+	[Whether or not to build static libraries])
+])# _LT_ENABLE_STATIC
+
+LT_OPTION_DEFINE([LT_INIT], [static], [_LT_ENABLE_STATIC([yes])])
+LT_OPTION_DEFINE([LT_INIT], [disable-static], [_LT_ENABLE_STATIC([no])])
+
+# Old names:
+AC_DEFUN([AC_ENABLE_STATIC],
+[_LT_SET_OPTION([LT_INIT], m4_if([$1], [no], [disable-])[static])
+])
+
+AC_DEFUN([AC_DISABLE_STATIC],
+[_LT_SET_OPTION([LT_INIT], [disable-static])
+])
+
+AU_DEFUN([AM_ENABLE_STATIC], [AC_ENABLE_STATIC($@)])
+AU_DEFUN([AM_DISABLE_STATIC], [AC_DISABLE_STATIC($@)])
+
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([AM_ENABLE_STATIC], [])
+dnl AC_DEFUN([AM_DISABLE_STATIC], [])
+
+
+
+# _LT_ENABLE_FAST_INSTALL([DEFAULT])
+# ----------------------------------
+# implement the --enable-fast-install flag, and support the 'fast-install'
+# and 'disable-fast-install' LT_INIT options.
+# DEFAULT is either 'yes' or 'no'.  If omitted, it defaults to 'yes'.
+m4_define([_LT_ENABLE_FAST_INSTALL],
+[m4_define([_LT_ENABLE_FAST_INSTALL_DEFAULT], [m4_if($1, no, no, yes)])dnl
+AC_ARG_ENABLE([fast-install],
+    [AS_HELP_STRING([--enable-fast-install@<:@=PKGS@:>@],
+    [optimize for fast installation @<:@default=]_LT_ENABLE_FAST_INSTALL_DEFAULT[@:>@])],
+    [p=${PACKAGE-default}
+    case $enableval in
+    yes) enable_fast_install=yes ;;
+    no) enable_fast_install=no ;;
+    *)
+      enable_fast_install=no
+      # Look at the argument we got.  We use all the common list separators.
+      lt_save_ifs=$IFS; IFS=$IFS$PATH_SEPARATOR,
+      for pkg in $enableval; do
+	IFS=$lt_save_ifs
+	if test "X$pkg" = "X$p"; then
+	  enable_fast_install=yes
+	fi
+      done
+      IFS=$lt_save_ifs
+      ;;
+    esac],
+    [enable_fast_install=]_LT_ENABLE_FAST_INSTALL_DEFAULT)
+
+_LT_DECL([fast_install], [enable_fast_install], [0],
+	 [Whether or not to optimize for fast installation])dnl
+])# _LT_ENABLE_FAST_INSTALL
+
+LT_OPTION_DEFINE([LT_INIT], [fast-install], [_LT_ENABLE_FAST_INSTALL([yes])])
+LT_OPTION_DEFINE([LT_INIT], [disable-fast-install], [_LT_ENABLE_FAST_INSTALL([no])])
+
+# Old names:
+AU_DEFUN([AC_ENABLE_FAST_INSTALL],
+[_LT_SET_OPTION([LT_INIT], m4_if([$1], [no], [disable-])[fast-install])
+AC_DIAGNOSE([obsolete],
+[$0: Remove this warning and the call to _LT_SET_OPTION when you put
+the 'fast-install' option into LT_INIT's first parameter.])
+])
+
+AU_DEFUN([AC_DISABLE_FAST_INSTALL],
+[_LT_SET_OPTION([LT_INIT], [disable-fast-install])
+AC_DIAGNOSE([obsolete],
+[$0: Remove this warning and the call to _LT_SET_OPTION when you put
+the 'disable-fast-install' option into LT_INIT's first parameter.])
+])
+
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([AC_ENABLE_FAST_INSTALL], [])
+dnl AC_DEFUN([AM_DISABLE_FAST_INSTALL], [])
+
+
+# _LT_WITH_AIX_SONAME([DEFAULT])
+# ----------------------------------
+# implement the --with-aix-soname flag, and support the `aix-soname=aix'
+# and `aix-soname=both' and `aix-soname=svr4' LT_INIT options. DEFAULT
+# is either `aix', `both' or `svr4'.  If omitted, it defaults to `aix'.
+m4_define([_LT_WITH_AIX_SONAME],
+[m4_define([_LT_WITH_AIX_SONAME_DEFAULT], [m4_if($1, svr4, svr4, m4_if($1, both, both, aix))])dnl
+shared_archive_member_spec=
+case $host,$enable_shared in
+power*-*-aix[[5-9]]*,yes)
+  AC_MSG_CHECKING([which variant of shared library versioning to provide])
+  AC_ARG_WITH([aix-soname],
+    [AS_HELP_STRING([--with-aix-soname=aix|svr4|both],
+      [shared library versioning (aka "SONAME") variant to provide on AIX, @<:@default=]_LT_WITH_AIX_SONAME_DEFAULT[@:>@.])],
+    [case $withval in
+    aix|svr4|both)
+      ;;
+    *)
+      AC_MSG_ERROR([Unknown argument to --with-aix-soname])
+      ;;
+    esac
+    lt_cv_with_aix_soname=$with_aix_soname],
+    [AC_CACHE_VAL([lt_cv_with_aix_soname],
+      [lt_cv_with_aix_soname=]_LT_WITH_AIX_SONAME_DEFAULT)
+    with_aix_soname=$lt_cv_with_aix_soname])
+  AC_MSG_RESULT([$with_aix_soname])
+  if test aix != "$with_aix_soname"; then
+    # For the AIX way of multilib, we name the shared archive member
+    # based on the bitwidth used, traditionally 'shr.o' or 'shr_64.o',
+    # and 'shr.imp' or 'shr_64.imp', respectively, for the Import File.
+    # Even when GNU compilers ignore OBJECT_MODE but need '-maix64' flag,
+    # the AIX toolchain works better with OBJECT_MODE set (default 32).
+    if test 64 = "${OBJECT_MODE-32}"; then
+      shared_archive_member_spec=shr_64
+    else
+      shared_archive_member_spec=shr
+    fi
+  fi
+  ;;
+*)
+  with_aix_soname=aix
+  ;;
+esac
+
+_LT_DECL([], [shared_archive_member_spec], [0],
+    [Shared archive member basename, for filename based shared library versioning on AIX])dnl
+])# _LT_WITH_AIX_SONAME
+
+LT_OPTION_DEFINE([LT_INIT], [aix-soname=aix], [_LT_WITH_AIX_SONAME([aix])])
+LT_OPTION_DEFINE([LT_INIT], [aix-soname=both], [_LT_WITH_AIX_SONAME([both])])
+LT_OPTION_DEFINE([LT_INIT], [aix-soname=svr4], [_LT_WITH_AIX_SONAME([svr4])])
+
+
+# _LT_WITH_PIC([MODE])
+# --------------------
+# implement the --with-pic flag, and support the 'pic-only' and 'no-pic'
+# LT_INIT options.
+# MODE is either 'yes' or 'no'.  If omitted, it defaults to 'both'.
+m4_define([_LT_WITH_PIC],
+[AC_ARG_WITH([pic],
+    [AS_HELP_STRING([--with-pic@<:@=PKGS@:>@],
+	[try to use only PIC/non-PIC objects @<:@default=use both@:>@])],
+    [lt_p=${PACKAGE-default}
+    case $withval in
+    yes|no) pic_mode=$withval ;;
+    *)
+      pic_mode=default
+      # Look at the argument we got.  We use all the common list separators.
+      lt_save_ifs=$IFS; IFS=$IFS$PATH_SEPARATOR,
+      for lt_pkg in $withval; do
+	IFS=$lt_save_ifs
+	if test "X$lt_pkg" = "X$lt_p"; then
+	  pic_mode=yes
+	fi
+      done
+      IFS=$lt_save_ifs
+      ;;
+    esac],
+    [pic_mode=m4_default([$1], [default])])
+
+_LT_DECL([], [pic_mode], [0], [What type of objects to build])dnl
+])# _LT_WITH_PIC
+
+LT_OPTION_DEFINE([LT_INIT], [pic-only], [_LT_WITH_PIC([yes])])
+LT_OPTION_DEFINE([LT_INIT], [no-pic], [_LT_WITH_PIC([no])])
+
+# Old name:
+AU_DEFUN([AC_LIBTOOL_PICMODE],
+[_LT_SET_OPTION([LT_INIT], [pic-only])
+AC_DIAGNOSE([obsolete],
+[$0: Remove this warning and the call to _LT_SET_OPTION when you
+put the 'pic-only' option into LT_INIT's first parameter.])
+])
+
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([AC_LIBTOOL_PICMODE], [])
+
+
+m4_define([_LTDL_MODE], [])
+LT_OPTION_DEFINE([LTDL_INIT], [nonrecursive],
+		 [m4_define([_LTDL_MODE], [nonrecursive])])
+LT_OPTION_DEFINE([LTDL_INIT], [recursive],
+		 [m4_define([_LTDL_MODE], [recursive])])
+LT_OPTION_DEFINE([LTDL_INIT], [subproject],
+		 [m4_define([_LTDL_MODE], [subproject])])
+
+m4_define([_LTDL_TYPE], [])
+LT_OPTION_DEFINE([LTDL_INIT], [installable],
+		 [m4_define([_LTDL_TYPE], [installable])])
+LT_OPTION_DEFINE([LTDL_INIT], [convenience],
+		 [m4_define([_LTDL_TYPE], [convenience])])
+
+# ltsugar.m4 -- libtool m4 base layer.                         -*-Autoconf-*-
+#
+# Copyright (C) 2004-2005, 2007-2008, 2011-2015 Free Software
+# Foundation, Inc.
+# Written by Gary V. Vaughan, 2004
+#
+# This file is free software; the Free Software Foundation gives
+# unlimited permission to copy and/or distribute it, with or without
+# modifications, as long as this notice is preserved.
+
+# serial 6 ltsugar.m4
+
+# This is to help aclocal find these macros, as it can't see m4_define.
+AC_DEFUN([LTSUGAR_VERSION], [m4_if([0.1])])
+
+
+# lt_join(SEP, ARG1, [ARG2...])
+# -----------------------------
+# Produce ARG1SEPARG2...SEPARGn, omitting [] arguments and their
+# associated separator.
+# Needed until we can rely on m4_join from Autoconf 2.62, since all earlier
+# versions in m4sugar had bugs.
+m4_define([lt_join],
+[m4_if([$#], [1], [],
+       [$#], [2], [[$2]],
+       [m4_if([$2], [], [], [[$2]_])$0([$1], m4_shift(m4_shift($@)))])])
+m4_define([_lt_join],
+[m4_if([$#$2], [2], [],
+       [m4_if([$2], [], [], [[$1$2]])$0([$1], m4_shift(m4_shift($@)))])])
+
+
+# lt_car(LIST)
+# lt_cdr(LIST)
+# ------------
+# Manipulate m4 lists.
+# These macros are necessary as long as will still need to support
+# Autoconf-2.59, which quotes differently.
+m4_define([lt_car], [[$1]])
+m4_define([lt_cdr],
+[m4_if([$#], 0, [m4_fatal([$0: cannot be called without arguments])],
+       [$#], 1, [],
+       [m4_dquote(m4_shift($@))])])
+m4_define([lt_unquote], $1)
+
+
+# lt_append(MACRO-NAME, STRING, [SEPARATOR])
+# ------------------------------------------
+# Redefine MACRO-NAME to hold its former content plus 'SEPARATOR''STRING'.
+# Note that neither SEPARATOR nor STRING are expanded; they are appended
+# to MACRO-NAME as is (leaving the expansion for when MACRO-NAME is invoked).
+# No SEPARATOR is output if MACRO-NAME was previously undefined (different
+# than defined and empty).
+#
+# This macro is needed until we can rely on Autoconf 2.62, since earlier
+# versions of m4sugar mistakenly expanded SEPARATOR but not STRING.
+m4_define([lt_append],
+[m4_define([$1],
+	   m4_ifdef([$1], [m4_defn([$1])[$3]])[$2])])
+
+
+
+# lt_combine(SEP, PREFIX-LIST, INFIX, SUFFIX1, [SUFFIX2...])
+# ----------------------------------------------------------
+# Produce a SEP delimited list of all paired combinations of elements of
+# PREFIX-LIST with SUFFIX1 through SUFFIXn.  Each element of the list
+# has the form PREFIXmINFIXSUFFIXn.
+# Needed until we can rely on m4_combine added in Autoconf 2.62.
+m4_define([lt_combine],
+[m4_if(m4_eval([$# > 3]), [1],
+       [m4_pushdef([_Lt_sep], [m4_define([_Lt_sep], m4_defn([lt_car]))])]]dnl
+[[m4_foreach([_Lt_prefix], [$2],
+	     [m4_foreach([_Lt_suffix],
+		]m4_dquote(m4_dquote(m4_shift(m4_shift(m4_shift($@)))))[,
+	[_Lt_sep([$1])[]m4_defn([_Lt_prefix])[$3]m4_defn([_Lt_suffix])])])])])
+
+
+# lt_if_append_uniq(MACRO-NAME, VARNAME, [SEPARATOR], [UNIQ], [NOT-UNIQ])
+# -----------------------------------------------------------------------
+# Iff MACRO-NAME does not yet contain VARNAME, then append it (delimited
+# by SEPARATOR if supplied) and expand UNIQ, else NOT-UNIQ.
+m4_define([lt_if_append_uniq],
+[m4_ifdef([$1],
+	  [m4_if(m4_index([$3]m4_defn([$1])[$3], [$3$2$3]), [-1],
+		 [lt_append([$1], [$2], [$3])$4],
+		 [$5])],
+	  [lt_append([$1], [$2], [$3])$4])])
+
+
+# lt_dict_add(DICT, KEY, VALUE)
+# -----------------------------
+m4_define([lt_dict_add],
+[m4_define([$1($2)], [$3])])
+
+
+# lt_dict_add_subkey(DICT, KEY, SUBKEY, VALUE)
+# --------------------------------------------
+m4_define([lt_dict_add_subkey],
+[m4_define([$1($2:$3)], [$4])])
+
+
+# lt_dict_fetch(DICT, KEY, [SUBKEY])
+# ----------------------------------
+m4_define([lt_dict_fetch],
+[m4_ifval([$3],
+	m4_ifdef([$1($2:$3)], [m4_defn([$1($2:$3)])]),
+    m4_ifdef([$1($2)], [m4_defn([$1($2)])]))])
+
+
+# lt_if_dict_fetch(DICT, KEY, [SUBKEY], VALUE, IF-TRUE, [IF-FALSE])
+# -----------------------------------------------------------------
+m4_define([lt_if_dict_fetch],
+[m4_if(lt_dict_fetch([$1], [$2], [$3]), [$4],
+	[$5],
+    [$6])])
+
+
+# lt_dict_filter(DICT, [SUBKEY], VALUE, [SEPARATOR], KEY, [...])
+# --------------------------------------------------------------
+m4_define([lt_dict_filter],
+[m4_if([$5], [], [],
+  [lt_join(m4_quote(m4_default([$4], [[, ]])),
+           lt_unquote(m4_split(m4_normalize(m4_foreach(_Lt_key, lt_car([m4_shiftn(4, $@)]),
+		      [lt_if_dict_fetch([$1], _Lt_key, [$2], [$3], [_Lt_key ])])))))])[]dnl
+])
+
+# ltversion.m4 -- version numbers			-*- Autoconf -*-
+#
+#   Copyright (C) 2004, 2011-2015 Free Software Foundation, Inc.
+#   Written by Scott James Remnant, 2004
+#
+# This file is free software; the Free Software Foundation gives
+# unlimited permission to copy and/or distribute it, with or without
+# modifications, as long as this notice is preserved.
+
+# @configure_input@
+
+# serial 4179 ltversion.m4
+# This file is part of GNU Libtool
+
+m4_define([LT_PACKAGE_VERSION], [2.4.6])
+m4_define([LT_PACKAGE_REVISION], [2.4.6])
+
+AC_DEFUN([LTVERSION_VERSION],
+[macro_version='2.4.6'
+macro_revision='2.4.6'
+_LT_DECL(, macro_version, 0, [Which release of libtool.m4 was used?])
+_LT_DECL(, macro_revision, 0)
+])
+
+# lt~obsolete.m4 -- aclocal satisfying obsolete definitions.    -*-Autoconf-*-
+#
+#   Copyright (C) 2004-2005, 2007, 2009, 2011-2015 Free Software
+#   Foundation, Inc.
+#   Written by Scott James Remnant, 2004.
+#
+# This file is free software; the Free Software Foundation gives
+# unlimited permission to copy and/or distribute it, with or without
+# modifications, as long as this notice is preserved.
+
+# serial 5 lt~obsolete.m4
+
+# These exist entirely to fool aclocal when bootstrapping libtool.
+#
+# In the past libtool.m4 has provided macros via AC_DEFUN (or AU_DEFUN),
+# which have later been changed to m4_define as they aren't part of the
+# exported API, or moved to Autoconf or Automake where they belong.
+#
+# The trouble is, aclocal is a bit thick.  It'll see the old AC_DEFUN
+# in /usr/share/aclocal/libtool.m4 and remember it, then when it sees us
+# using a macro with the same name in our local m4/libtool.m4 it'll
+# pull the old libtool.m4 in (it doesn't see our shiny new m4_define
+# and doesn't know about Autoconf macros at all.)
+#
+# So we provide this file, which has a silly filename so it's always
+# included after everything else.  This provides aclocal with the
+# AC_DEFUNs it wants, but when m4 processes it, it doesn't do anything
+# because those macros already exist, or will be overwritten later.
+# We use AC_DEFUN over AU_DEFUN for compatibility with aclocal-1.6.
+#
+# Anytime we withdraw an AC_DEFUN or AU_DEFUN, remember to add it here.
+# Yes, that means every name once taken will need to remain here until
+# we give up compatibility with versions before 1.7, at which point
+# we need to keep only those names which we still refer to.
+
+# This is to help aclocal find these macros, as it can't see m4_define.
+AC_DEFUN([LTOBSOLETE_VERSION], [m4_if([1])])
+
+m4_ifndef([AC_LIBTOOL_LINKER_OPTION],	[AC_DEFUN([AC_LIBTOOL_LINKER_OPTION])])
+m4_ifndef([AC_PROG_EGREP],		[AC_DEFUN([AC_PROG_EGREP])])
+m4_ifndef([_LT_AC_PROG_ECHO_BACKSLASH],	[AC_DEFUN([_LT_AC_PROG_ECHO_BACKSLASH])])
+m4_ifndef([_LT_AC_SHELL_INIT],		[AC_DEFUN([_LT_AC_SHELL_INIT])])
+m4_ifndef([_LT_AC_SYS_LIBPATH_AIX],	[AC_DEFUN([_LT_AC_SYS_LIBPATH_AIX])])
+m4_ifndef([_LT_PROG_LTMAIN],		[AC_DEFUN([_LT_PROG_LTMAIN])])
+m4_ifndef([_LT_AC_TAGVAR],		[AC_DEFUN([_LT_AC_TAGVAR])])
+m4_ifndef([AC_LTDL_ENABLE_INSTALL],	[AC_DEFUN([AC_LTDL_ENABLE_INSTALL])])
+m4_ifndef([AC_LTDL_PREOPEN],		[AC_DEFUN([AC_LTDL_PREOPEN])])
+m4_ifndef([_LT_AC_SYS_COMPILER],	[AC_DEFUN([_LT_AC_SYS_COMPILER])])
+m4_ifndef([_LT_AC_LOCK],		[AC_DEFUN([_LT_AC_LOCK])])
+m4_ifndef([AC_LIBTOOL_SYS_OLD_ARCHIVE],	[AC_DEFUN([AC_LIBTOOL_SYS_OLD_ARCHIVE])])
+m4_ifndef([_LT_AC_TRY_DLOPEN_SELF],	[AC_DEFUN([_LT_AC_TRY_DLOPEN_SELF])])
+m4_ifndef([AC_LIBTOOL_PROG_CC_C_O],	[AC_DEFUN([AC_LIBTOOL_PROG_CC_C_O])])
+m4_ifndef([AC_LIBTOOL_SYS_HARD_LINK_LOCKS], [AC_DEFUN([AC_LIBTOOL_SYS_HARD_LINK_LOCKS])])
+m4_ifndef([AC_LIBTOOL_OBJDIR],		[AC_DEFUN([AC_LIBTOOL_OBJDIR])])
+m4_ifndef([AC_LTDL_OBJDIR],		[AC_DEFUN([AC_LTDL_OBJDIR])])
+m4_ifndef([AC_LIBTOOL_PROG_LD_HARDCODE_LIBPATH], [AC_DEFUN([AC_LIBTOOL_PROG_LD_HARDCODE_LIBPATH])])
+m4_ifndef([AC_LIBTOOL_SYS_LIB_STRIP],	[AC_DEFUN([AC_LIBTOOL_SYS_LIB_STRIP])])
+m4_ifndef([AC_PATH_MAGIC],		[AC_DEFUN([AC_PATH_MAGIC])])
+m4_ifndef([AC_PROG_LD_GNU],		[AC_DEFUN([AC_PROG_LD_GNU])])
+m4_ifndef([AC_PROG_LD_RELOAD_FLAG],	[AC_DEFUN([AC_PROG_LD_RELOAD_FLAG])])
+m4_ifndef([AC_DEPLIBS_CHECK_METHOD],	[AC_DEFUN([AC_DEPLIBS_CHECK_METHOD])])
+m4_ifndef([AC_LIBTOOL_PROG_COMPILER_NO_RTTI], [AC_DEFUN([AC_LIBTOOL_PROG_COMPILER_NO_RTTI])])
+m4_ifndef([AC_LIBTOOL_SYS_GLOBAL_SYMBOL_PIPE], [AC_DEFUN([AC_LIBTOOL_SYS_GLOBAL_SYMBOL_PIPE])])
+m4_ifndef([AC_LIBTOOL_PROG_COMPILER_PIC], [AC_DEFUN([AC_LIBTOOL_PROG_COMPILER_PIC])])
+m4_ifndef([AC_LIBTOOL_PROG_LD_SHLIBS],	[AC_DEFUN([AC_LIBTOOL_PROG_LD_SHLIBS])])
+m4_ifndef([AC_LIBTOOL_POSTDEP_PREDEP],	[AC_DEFUN([AC_LIBTOOL_POSTDEP_PREDEP])])
+m4_ifndef([LT_AC_PROG_EGREP],		[AC_DEFUN([LT_AC_PROG_EGREP])])
+m4_ifndef([LT_AC_PROG_SED],		[AC_DEFUN([LT_AC_PROG_SED])])
+m4_ifndef([_LT_CC_BASENAME],		[AC_DEFUN([_LT_CC_BASENAME])])
+m4_ifndef([_LT_COMPILER_BOILERPLATE],	[AC_DEFUN([_LT_COMPILER_BOILERPLATE])])
+m4_ifndef([_LT_LINKER_BOILERPLATE],	[AC_DEFUN([_LT_LINKER_BOILERPLATE])])
+m4_ifndef([_AC_PROG_LIBTOOL],		[AC_DEFUN([_AC_PROG_LIBTOOL])])
+m4_ifndef([AC_LIBTOOL_SETUP],		[AC_DEFUN([AC_LIBTOOL_SETUP])])
+m4_ifndef([_LT_AC_CHECK_DLFCN],		[AC_DEFUN([_LT_AC_CHECK_DLFCN])])
+m4_ifndef([AC_LIBTOOL_SYS_DYNAMIC_LINKER],	[AC_DEFUN([AC_LIBTOOL_SYS_DYNAMIC_LINKER])])
+m4_ifndef([_LT_AC_TAGCONFIG],		[AC_DEFUN([_LT_AC_TAGCONFIG])])
+m4_ifndef([AC_DISABLE_FAST_INSTALL],	[AC_DEFUN([AC_DISABLE_FAST_INSTALL])])
+m4_ifndef([_LT_AC_LANG_CXX],		[AC_DEFUN([_LT_AC_LANG_CXX])])
+m4_ifndef([_LT_AC_LANG_F77],		[AC_DEFUN([_LT_AC_LANG_F77])])
+m4_ifndef([_LT_AC_LANG_GCJ],		[AC_DEFUN([_LT_AC_LANG_GCJ])])
+m4_ifndef([AC_LIBTOOL_LANG_C_CONFIG],	[AC_DEFUN([AC_LIBTOOL_LANG_C_CONFIG])])
+m4_ifndef([_LT_AC_LANG_C_CONFIG],	[AC_DEFUN([_LT_AC_LANG_C_CONFIG])])
+m4_ifndef([AC_LIBTOOL_LANG_CXX_CONFIG],	[AC_DEFUN([AC_LIBTOOL_LANG_CXX_CONFIG])])
+m4_ifndef([_LT_AC_LANG_CXX_CONFIG],	[AC_DEFUN([_LT_AC_LANG_CXX_CONFIG])])
+m4_ifndef([AC_LIBTOOL_LANG_F77_CONFIG],	[AC_DEFUN([AC_LIBTOOL_LANG_F77_CONFIG])])
+m4_ifndef([_LT_AC_LANG_F77_CONFIG],	[AC_DEFUN([_LT_AC_LANG_F77_CONFIG])])
+m4_ifndef([AC_LIBTOOL_LANG_GCJ_CONFIG],	[AC_DEFUN([AC_LIBTOOL_LANG_GCJ_CONFIG])])
+m4_ifndef([_LT_AC_LANG_GCJ_CONFIG],	[AC_DEFUN([_LT_AC_LANG_GCJ_CONFIG])])
+m4_ifndef([AC_LIBTOOL_LANG_RC_CONFIG],	[AC_DEFUN([AC_LIBTOOL_LANG_RC_CONFIG])])
+m4_ifndef([_LT_AC_LANG_RC_CONFIG],	[AC_DEFUN([_LT_AC_LANG_RC_CONFIG])])
+m4_ifndef([AC_LIBTOOL_CONFIG],		[AC_DEFUN([AC_LIBTOOL_CONFIG])])
+m4_ifndef([_LT_AC_FILE_LTDLL_C],	[AC_DEFUN([_LT_AC_FILE_LTDLL_C])])
+m4_ifndef([_LT_REQUIRED_DARWIN_CHECKS],	[AC_DEFUN([_LT_REQUIRED_DARWIN_CHECKS])])
+m4_ifndef([_LT_AC_PROG_CXXCPP],		[AC_DEFUN([_LT_AC_PROG_CXXCPP])])
+m4_ifndef([_LT_PREPARE_SED_QUOTE_VARS],	[AC_DEFUN([_LT_PREPARE_SED_QUOTE_VARS])])
+m4_ifndef([_LT_PROG_ECHO_BACKSLASH],	[AC_DEFUN([_LT_PROG_ECHO_BACKSLASH])])
+m4_ifndef([_LT_PROG_F77],		[AC_DEFUN([_LT_PROG_F77])])
+m4_ifndef([_LT_PROG_FC],		[AC_DEFUN([_LT_PROG_FC])])
+m4_ifndef([_LT_PROG_CXX],		[AC_DEFUN([_LT_PROG_CXX])])
+
+# Copyright (C) 2002-2017 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# AM_AUTOMAKE_VERSION(VERSION)
+# ----------------------------
+# Automake X.Y traces this macro to ensure aclocal.m4 has been
+# generated from the m4 files accompanying Automake X.Y.
+# (This private macro should not be called outside this file.)
+AC_DEFUN([AM_AUTOMAKE_VERSION],
+[am__api_version='1.15'
+dnl Some users find AM_AUTOMAKE_VERSION and mistake it for a way to
+dnl require some minimum version.  Point them to the right macro.
+m4_if([$1], [1.15.1], [],
+      [AC_FATAL([Do not call $0, use AM_INIT_AUTOMAKE([$1]).])])dnl
+])
+
+# _AM_AUTOCONF_VERSION(VERSION)
+# -----------------------------
+# aclocal traces this macro to find the Autoconf version.
+# This is a private macro too.  Using m4_define simplifies
+# the logic in aclocal, which can simply ignore this definition.
+m4_define([_AM_AUTOCONF_VERSION], [])
+
+# AM_SET_CURRENT_AUTOMAKE_VERSION
+# -------------------------------
+# Call AM_AUTOMAKE_VERSION and AM_AUTOMAKE_VERSION so they can be traced.
+# This function is AC_REQUIREd by AM_INIT_AUTOMAKE.
+AC_DEFUN([AM_SET_CURRENT_AUTOMAKE_VERSION],
+[AM_AUTOMAKE_VERSION([1.15.1])dnl
+m4_ifndef([AC_AUTOCONF_VERSION],
+  [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl
+_AM_AUTOCONF_VERSION(m4_defn([AC_AUTOCONF_VERSION]))])
+
+# Copyright (C) 2011-2017 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# AM_PROG_AR([ACT-IF-FAIL])
+# -------------------------
+# Try to determine the archiver interface, and trigger the ar-lib wrapper
+# if it is needed.  If the detection of archiver interface fails, run
+# ACT-IF-FAIL (default is to abort configure with a proper error message).
+AC_DEFUN([AM_PROG_AR],
+[AC_BEFORE([$0], [LT_INIT])dnl
+AC_BEFORE([$0], [AC_PROG_LIBTOOL])dnl
+AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
+AC_REQUIRE_AUX_FILE([ar-lib])dnl
+AC_CHECK_TOOLS([AR], [ar lib "link -lib"], [false])
+: ${AR=ar}
+
+AC_CACHE_CHECK([the archiver ($AR) interface], [am_cv_ar_interface],
+  [AC_LANG_PUSH([C])
+   am_cv_ar_interface=ar
+   AC_COMPILE_IFELSE([AC_LANG_SOURCE([[int some_variable = 0;]])],
+     [am_ar_try='$AR cru libconftest.a conftest.$ac_objext >&AS_MESSAGE_LOG_FD'
+      AC_TRY_EVAL([am_ar_try])
+      if test "$ac_status" -eq 0; then
+        am_cv_ar_interface=ar
+      else
+        am_ar_try='$AR -NOLOGO -OUT:conftest.lib conftest.$ac_objext >&AS_MESSAGE_LOG_FD'
+        AC_TRY_EVAL([am_ar_try])
+        if test "$ac_status" -eq 0; then
+          am_cv_ar_interface=lib
+        else
+          am_cv_ar_interface=unknown
+        fi
+      fi
+      rm -f conftest.lib libconftest.a
+     ])
+   AC_LANG_POP([C])])
+
+case $am_cv_ar_interface in
+ar)
+  ;;
+lib)
+  # Microsoft lib, so override with the ar-lib wrapper script.
+  # FIXME: It is wrong to rewrite AR.
+  # But if we don't then we get into trouble of one sort or another.
+  # A longer-term fix would be to have automake use am__AR in this case,
+  # and then we could set am__AR="$am_aux_dir/ar-lib \$(AR)" or something
+  # similar.
+  AR="$am_aux_dir/ar-lib $AR"
+  ;;
+unknown)
+  m4_default([$1],
+             [AC_MSG_ERROR([could not determine $AR interface])])
+  ;;
+esac
+AC_SUBST([AR])dnl
+])
+
+# Figure out how to run the assembler.                      -*- Autoconf -*-
+
+# Copyright (C) 2001-2017 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# AM_PROG_AS
+# ----------
+AC_DEFUN([AM_PROG_AS],
+[# By default we simply use the C compiler to build assembly code.
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+test "${CCASFLAGS+set}" = set || CCASFLAGS=$CFLAGS
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+AC_ARG_VAR([CCASFLAGS], [assembler compiler flags (defaults to CFLAGS)])
+_AM_IF_OPTION([no-dependencies],, [_AM_DEPENDENCIES([CCAS])])dnl
+])
+
+# AM_AUX_DIR_EXPAND                                         -*- Autoconf -*-
+
+# Copyright (C) 2001-2017 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# For projects using AC_CONFIG_AUX_DIR([foo]), Autoconf sets
+# $ac_aux_dir to '$srcdir/foo'.  In other projects, it is set to
+# '$srcdir', '$srcdir/..', or '$srcdir/../..'.
+#
+# Of course, Automake must honor this variable whenever it calls a
+# tool from the auxiliary directory.  The problem is that $srcdir (and
+# therefore $ac_aux_dir as well) can be either absolute or relative,
+# depending on how configure is run.  This is pretty annoying, since
+# it makes $ac_aux_dir quite unusable in subdirectories: in the top
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+#    fails when called from a subdirectory if $ac_aux_dir is relative
+# $top_srcdir/$ac_aux_dir/missing
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+#    fails when called from a subdirectory in a VPATH build with
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+# are both prefixed by $srcdir.  In an in-source build this is usually
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+# configure, and could therefore not use this "fixed" $ac_aux_dir.
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+AC_DEFUN([AM_AUX_DIR_EXPAND],
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+am_aux_dir=`cd "$ac_aux_dir" && pwd`
+])
+
+# AM_CONDITIONAL                                            -*- Autoconf -*-
+
+# Copyright (C) 1997-2017 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# AM_CONDITIONAL(NAME, SHELL-CONDITION)
+# -------------------------------------
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+AC_DEFUN([AM_CONDITIONAL],
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+AC_CONFIG_COMMANDS_PRE(
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+  AC_MSG_ERROR([[conditional "$1" was never defined.
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+fi])])
+
+# Copyright (C) 1999-2017 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+
+# There are a few dirty hacks below to avoid letting 'AC_PROG_CC' be
+# written in clear, in which case automake, when reading aclocal.m4,
+# will think it sees a *use*, and therefore will trigger all it's
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+# CC etc. in the Makefile, will ask for an AC_PROG_CC use...
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+
+# _AM_DEPENDENCIES(NAME)
+# ----------------------
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+# We don't AC_REQUIRE the corresponding AC_PROG_CC since the latter was
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+AC_DEFUN([_AM_DEPENDENCIES],
+[AC_REQUIRE([AM_SET_DEPDIR])dnl
+AC_REQUIRE([AM_OUTPUT_DEPENDENCY_COMMANDS])dnl
+AC_REQUIRE([AM_MAKE_INCLUDE])dnl
+AC_REQUIRE([AM_DEP_TRACK])dnl
+
+m4_if([$1], [CC],   [depcc="$CC"   am_compiler_list=],
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+      [$1], [OBJC], [depcc="$OBJC" am_compiler_list='gcc3 gcc'],
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+AC_CACHE_CHECK([dependency style of $depcc],
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+[if test -z "$AMDEP_TRUE" && test -f "$am_depcomp"; then
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+  # in D".
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+  mkdir conftest.dir
+  # Copy depcomp to subdir because otherwise we won't find it if we're
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+  cp "$am_depcomp" conftest.dir
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+  mkdir sub
+
+  am_cv_$1_dependencies_compiler_type=none
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+  m4_case([$1], [CC],
+    [case " $depcc " in #(
+     *\ -arch\ *\ -arch\ *) am__universal=true ;;
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+    [CXX],
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+     *\ -arch\ *\ -arch\ *) am__universal=true ;;
+     esac])
+
+  for depmode in $am_compiler_list; do
+    # Setup a source with many dependencies, because some compilers
+    # like to wrap large dependency lists on column 80 (with \), and
+    # we should not choose a depcomp mode which is confused by this.
+    #
+    # We need to recreate these files for each test, as the compiler may
+    # overwrite some of them when testing with obscure command lines.
+    # This happens at least with the AIX C compiler.
+    : > sub/conftest.c
+    for i in 1 2 3 4 5 6; do
+      echo '#include "conftst'$i'.h"' >> sub/conftest.c
+      # Using ": > sub/conftst$i.h" creates only sub/conftst1.h with
+      # Solaris 10 /bin/sh.
+      echo '/* dummy */' > sub/conftst$i.h
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+    echo "${am__include} ${am__quote}sub/conftest.Po${am__quote}" > confmf
+
+    # We check with '-c' and '-o' for the sake of the "dashmstdout"
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+    # handle '-M -o', and we need to detect this.  Also, some Intel
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+    am__obj=sub/conftest.${OBJEXT-o}
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+      # After this tag, mechanisms are not by side-effect, so they'll
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+      else
+	break
+      fi
+      ;;
+    msvc7 | msvc7msys | msvisualcpp | msvcmsys)
+      # This compiler won't grok '-c -o', but also, the minuso test has
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+      am__obj=conftest.${OBJEXT-o}
+      am__minus_obj=
+      ;;
+    none) break ;;
+    esac
+    if depmode=$depmode \
+       source=sub/conftest.c object=$am__obj \
+       depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo \
+       $SHELL ./depcomp $depcc -c $am__minus_obj sub/conftest.c \
+         >/dev/null 2>conftest.err &&
+       grep sub/conftst1.h sub/conftest.Po > /dev/null 2>&1 &&
+       grep sub/conftst6.h sub/conftest.Po > /dev/null 2>&1 &&
+       grep $am__obj sub/conftest.Po > /dev/null 2>&1 &&
+       ${MAKE-make} -s -f confmf > /dev/null 2>&1; then
+      # icc doesn't choke on unknown options, it will just issue warnings
+      # or remarks (even with -Werror).  So we grep stderr for any message
+      # that says an option was ignored or not supported.
+      # When given -MP, icc 7.0 and 7.1 complain thusly:
+      #   icc: Command line warning: ignoring option '-M'; no argument required
+      # The diagnosis changed in icc 8.0:
+      #   icc: Command line remark: option '-MP' not supported
+      if (grep 'ignoring option' conftest.err ||
+          grep 'not supported' conftest.err) >/dev/null 2>&1; then :; else
+        am_cv_$1_dependencies_compiler_type=$depmode
+        break
+      fi
+    fi
+  done
+
+  cd ..
+  rm -rf conftest.dir
+else
+  am_cv_$1_dependencies_compiler_type=none
+fi
+])
+AC_SUBST([$1DEPMODE], [depmode=$am_cv_$1_dependencies_compiler_type])
+AM_CONDITIONAL([am__fastdep$1], [
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+  && test "$am_cv_$1_dependencies_compiler_type" = gcc3])
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+
+# AM_SET_DEPDIR
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+AC_DEFUN([AM_SET_DEPDIR],
+[AC_REQUIRE([AM_SET_LEADING_DOT])dnl
+AC_SUBST([DEPDIR], ["${am__leading_dot}deps"])dnl
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+  [--disable-dependency-tracking],
+  [speeds up one-time build])])
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+_AM_SUBST_NOTMAKE([AMDEPBACKSLASH])dnl
+AC_SUBST([am__nodep])dnl
+_AM_SUBST_NOTMAKE([am__nodep])dnl
+])
+
+# Generate code to set up dependency tracking.              -*- Autoconf -*-
+
+# Copyright (C) 1999-2017 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+
+# _AM_OUTPUT_DEPENDENCY_COMMANDS
+# ------------------------------
+AC_DEFUN([_AM_OUTPUT_DEPENDENCY_COMMANDS],
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+  # Older Autoconf quotes --file arguments for eval, but not when files
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+  case $CONFIG_FILES in
+  *\'*) eval set x "$CONFIG_FILES" ;;
+  *)   set x $CONFIG_FILES ;;
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+  shift
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+    # Check whether this is an Automake generated Makefile or not.
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+    # some people rename them; so instead we look at the file content.
+    # Grep'ing the first line is not enough: some people post-process
+    # each Makefile.in and add a new line on top of each file to say so.
+    # Grep'ing the whole file is not good either: AIX grep has a line
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+    # Extract the definition of DEPDIR, am__include, and am__quote
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+    am__include=`sed -n 's/^am__include = //p' < "$mf"`
+    test -z "$am__include" && continue
+    am__quote=`sed -n 's/^am__quote = //p' < "$mf"`
+    # Find all dependency output files, they are included files with
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+      fdir=`AS_DIRNAME(["$file"])`
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+}
+])# _AM_OUTPUT_DEPENDENCY_COMMANDS
+
+
+# AM_OUTPUT_DEPENDENCY_COMMANDS
+# -----------------------------
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+
+# Do all the work for Automake.                             -*- Autoconf -*-
+
+# Copyright (C) 1996-2017 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
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+# This macro actually does too much.  Some checks are only needed if
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+dnl Redefine AC_PROG_CC to automatically invoke _AM_PROG_CC_C_O.
+m4_define([AC_PROG_CC],
+m4_defn([AC_PROG_CC])
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+# AM_INIT_AUTOMAKE(PACKAGE, VERSION, [NO-DEFINE])
+# AM_INIT_AUTOMAKE([OPTIONS])
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+# The call with PACKAGE and VERSION arguments is the old style
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+# We support both call styles for the transition.  After
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+
+# test whether we have cygpath
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+ AC_SUBST([PACKAGE], ['AC_PACKAGE_TARNAME'])dnl
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+_AM_IF_OPTION([no-define],,
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+# Some tools Automake needs.
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+AC_REQUIRE([AC_ARG_PROGRAM])dnl
+AM_MISSING_PROG([ACLOCAL], [aclocal-${am__api_version}])
+AM_MISSING_PROG([AUTOCONF], [autoconf])
+AM_MISSING_PROG([AUTOMAKE], [automake-${am__api_version}])
+AM_MISSING_PROG([AUTOHEADER], [autoheader])
+AM_MISSING_PROG([MAKEINFO], [makeinfo])
+AC_REQUIRE([AM_PROG_INSTALL_SH])dnl
+AC_REQUIRE([AM_PROG_INSTALL_STRIP])dnl
+AC_REQUIRE([AC_PROG_MKDIR_P])dnl
+# For better backward compatibility.  To be removed once Automake 1.9.x
+# dies out for good.  For more background, see:
+# <http://lists.gnu.org/archive/html/automake/2012-07/msg00001.html>
+# <http://lists.gnu.org/archive/html/automake/2012-07/msg00014.html>
+AC_SUBST([mkdir_p], ['$(MKDIR_P)'])
+# We need awk for the "check" target (and possibly the TAP driver).  The
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+AC_REQUIRE([AC_PROG_AWK])dnl
+AC_REQUIRE([AC_PROG_MAKE_SET])dnl
+AC_REQUIRE([AM_SET_LEADING_DOT])dnl
+_AM_IF_OPTION([tar-ustar], [_AM_PROG_TAR([ustar])],
+	      [_AM_IF_OPTION([tar-pax], [_AM_PROG_TAR([pax])],
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+AC_PROVIDE_IFELSE([AC_PROG_CXX],
+		  [_AM_DEPENDENCIES([CXX])],
+		  [m4_define([AC_PROG_CXX],
+			     m4_defn([AC_PROG_CXX])[_AM_DEPENDENCIES([CXX])])])dnl
+AC_PROVIDE_IFELSE([AC_PROG_OBJC],
+		  [_AM_DEPENDENCIES([OBJC])],
+		  [m4_define([AC_PROG_OBJC],
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+AC_PROVIDE_IFELSE([AC_PROG_OBJCXX],
+		  [_AM_DEPENDENCIES([OBJCXX])],
+		  [m4_define([AC_PROG_OBJCXX],
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+# recipes.  So use an aggressive probe to check that the usage we want is
+# actually supported "in the wild" to an acceptable degree.
+# See automake bug#10828.
+# To make any issue more visible, cause the running configure to be aborted
+# by default if the 'rm' program in use doesn't match our expectations; the
+# user can still override this though.
+if rm -f && rm -fr && rm -rf; then : OK; else
+  cat >&2 <<'END'
+Oops!
+
+Your 'rm' program seems unable to run without file operands specified
+on the command line, even when the '-f' option is present.  This is contrary
+to the behaviour of most rm programs out there, and not conforming with
+the upcoming POSIX standard: <http://austingroupbugs.net/view.php?id=542>
+
+Please tell bug-automake@gnu.org about your system, including the value
+of your $PATH and any error possibly output before this message.  This
+can help us improve future automake versions.
+
+END
+  if test x"$ACCEPT_INFERIOR_RM_PROGRAM" = x"yes"; then
+    echo 'Configuration will proceed anyway, since you have set the' >&2
+    echo 'ACCEPT_INFERIOR_RM_PROGRAM variable to "yes"' >&2
+    echo >&2
+  else
+    cat >&2 <<'END'
+Aborting the configuration process, to ensure you take notice of the issue.
+
+You can download and install GNU coreutils to get an 'rm' implementation
+that behaves properly: <http://www.gnu.org/software/coreutils/>.
+
+If you want to complete the configuration process using your problematic
+'rm' anyway, export the environment variable ACCEPT_INFERIOR_RM_PROGRAM
+to "yes", and re-run configure.
+
+END
+    AC_MSG_ERROR([Your 'rm' program is bad, sorry.])
+  fi
+fi
+dnl The trailing newline in this macro's definition is deliberate, for
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+])
+
+dnl Hook into '_AC_COMPILER_EXEEXT' early to learn its expansion.  Do not
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+# When config.status generates a header, we must update the stamp-h file.
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+# Copyright (C) 2001-2017 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# AM_PROG_INSTALL_SH
+# ------------------
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+AC_DEFUN([AM_PROG_INSTALL_SH],
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+  case $am_aux_dir in
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+    install_sh="\${SHELL} '$am_aux_dir/install-sh'" ;;
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+    install_sh="\${SHELL} $am_aux_dir/install-sh"
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+fi
+AC_SUBST([install_sh])])
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+# Copyright (C) 2003-2017 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# Check whether the underlying file-system supports filenames
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+AC_DEFUN([AM_SET_LEADING_DOT],
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+  am__leading_dot=_
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+AC_SUBST([am__leading_dot])])
+
+# Add --enable-maintainer-mode option to configure.         -*- Autoconf -*-
+# From Jim Meyering
+
+# Copyright (C) 1996-2017 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# AM_MAINTAINER_MODE([DEFAULT-MODE])
+# ----------------------------------
+# Control maintainer-specific portions of Makefiles.
+# Default is to disable them, unless 'enable' is passed literally.
+# For symmetry, 'disable' may be passed as well.  Anyway, the user
+# can override the default with the --enable/--disable switch.
+AC_DEFUN([AM_MAINTAINER_MODE],
+[m4_case(m4_default([$1], [disable]),
+       [enable], [m4_define([am_maintainer_other], [disable])],
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+        m4_warn([syntax], [unexpected argument to AM@&t@_MAINTAINER_MODE: $1])])
+AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
+  dnl maintainer-mode's default is 'disable' unless 'enable' is passed
+  AC_ARG_ENABLE([maintainer-mode],
+    [AS_HELP_STRING([--]am_maintainer_other[-maintainer-mode],
+      am_maintainer_other[ make rules and dependencies not useful
+      (and sometimes confusing) to the casual installer])],
+    [USE_MAINTAINER_MODE=$enableval],
+    [USE_MAINTAINER_MODE=]m4_if(am_maintainer_other, [enable], [no], [yes]))
+  AC_MSG_RESULT([$USE_MAINTAINER_MODE])
+  AM_CONDITIONAL([MAINTAINER_MODE], [test $USE_MAINTAINER_MODE = yes])
+  MAINT=$MAINTAINER_MODE_TRUE
+  AC_SUBST([MAINT])dnl
+]
+)
+
+# Check to see how 'make' treats includes.	            -*- Autoconf -*-
+
+# Copyright (C) 2001-2017 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# AM_MAKE_INCLUDE()
+# -----------------
+# Check to see how make treats includes.
+AC_DEFUN([AM_MAKE_INCLUDE],
+[am_make=${MAKE-make}
+cat > confinc << 'END'
+am__doit:
+	@echo this is the am__doit target
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+# If we don't find an include directive, just comment out the code.
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+am__include="#"
+am__quote=
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+# First try GNU make style include.
+echo "include confinc" > confmf
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+case `$am_make -s -f confmf 2> /dev/null` in #(
+*the\ am__doit\ target*)
+  am__include=include
+  am__quote=
+  _am_result=GNU
+  ;;
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+# Now try BSD make style include.
+if test "$am__include" = "#"; then
+   echo '.include "confinc"' > confmf
+   case `$am_make -s -f confmf 2> /dev/null` in #(
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+     am__include=.include
+     am__quote="\""
+     _am_result=BSD
+     ;;
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+AC_SUBST([am__include])
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+AC_MSG_RESULT([$_am_result])
+rm -f confinc confmf
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+# Fake the existence of programs that GNU maintainers use.  -*- Autoconf -*-
+
+# Copyright (C) 1997-2017 Free Software Foundation, Inc.
+#
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+
+# AM_MISSING_PROG(NAME, PROGRAM)
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+AC_DEFUN([AM_MISSING_PROG],
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+AC_SUBST($1)])
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+# AM_MISSING_HAS_RUN
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+  am_missing_run=
+  AC_MSG_WARN(['missing' script is too old or missing])
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+
+# Helper functions for option handling.                     -*- Autoconf -*-
+
+# Copyright (C) 2001-2017 Free Software Foundation, Inc.
+#
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+# with or without modifications, as long as this notice is preserved.
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+# _AM_SET_OPTIONS(OPTIONS)
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+[m4_foreach_w([_AM_Option], [$1], [_AM_SET_OPTION(_AM_Option)])])
+
+# _AM_IF_OPTION(OPTION, IF-SET, [IF-NOT-SET])
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+AC_DEFUN([_AM_IF_OPTION],
+[m4_ifset(_AM_MANGLE_OPTION([$1]), [$2], [$3])])
+
+# Copyright (C) 1999-2017 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# _AM_PROG_CC_C_O
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+  for am_i in 1 2; do
+    if AM_RUN_LOG([$CC -c conftest.$ac_ext -o conftest2.$ac_objext]) \
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+      break
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+  rm -f core conftest*
+  unset am_i])
+if test "$am_cv_prog_cc_c_o" != yes; then
+   # Losing compiler, so override with the script.
+   # FIXME: It is wrong to rewrite CC.
+   # But if we don't then we get into trouble of one sort or another.
+   # A longer-term fix would be to have automake use am__CC in this case,
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+AC_LANG_POP([C])])
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+# For backward compatibility.
+AC_DEFUN_ONCE([AM_PROG_CC_C_O], [AC_REQUIRE([AC_PROG_CC])])
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+# Copyright (C) 2001-2017 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# AM_RUN_LOG(COMMAND)
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+   echo "$as_me:$LINENO: \$? = $ac_status" >&AS_MESSAGE_LOG_FD
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+# Check to make sure that the build environment is sane.    -*- Autoconf -*-
+
+# Copyright (C) 1996-2017 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
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+# with or without modifications, as long as this notice is preserved.
+
+# AM_SANITY_CHECK
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+AC_DEFUN([AM_SANITY_CHECK],
+[AC_MSG_CHECKING([whether build environment is sane])
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+    AC_MSG_ERROR([unsafe absolute working directory name]);;
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+    AC_MSG_ERROR([unsafe srcdir value: '$srcdir']);;
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+# Do 'set' in a subshell so we don't clobber the current shell's
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+	set X `ls -t "$srcdir/configure" conftest.file`
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+     if test "$[*]" != "X $srcdir/configure conftest.file" \
+	&& test "$[*]" != "X conftest.file $srcdir/configure"; then
+
+	# If neither matched, then we have a broken ls.  This can happen
+	# if, for instance, CONFIG_SHELL is bash and it inherits a
+	# broken ls alias from the environment.  This has actually
+	# happened.  Such a system could not be considered "sane".
+	AC_MSG_ERROR([ls -t appears to fail.  Make sure there is not a broken
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+     fi
+     if test "$[2]" = conftest.file || test $am_try -eq 2; then
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+     # Just in case.
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+AC_MSG_RESULT([yes])
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+     wait $am_sleep_pid 2>/dev/null
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+   AC_MSG_RESULT([done])])
+rm -f conftest.file
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+
+# Copyright (C) 2009-2017 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# AM_SILENT_RULES([DEFAULT])
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+AC_DEFUN([AM_SILENT_RULES],
+[AC_ARG_ENABLE([silent-rules], [dnl
+AS_HELP_STRING(
+  [--enable-silent-rules],
+  [less verbose build output (undo: "make V=1")])
+AS_HELP_STRING(
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+   no) AM_DEFAULT_VERBOSITY=1;;
+    *) AM_DEFAULT_VERBOSITY=m4_if([$1], [yes], [0], [1]);;
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+dnl
+dnl A few 'make' implementations (e.g., NonStop OS and NextStep)
+dnl do not support nested variable expansions.
+dnl See automake bug#9928 and bug#10237.
+am_make=${MAKE-make}
+AC_CACHE_CHECK([whether $am_make supports nested variables],
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+   [if AS_ECHO([['TRUE=$(BAR$(V))
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+  am_cv_make_support_nested_variables=yes
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+  am_cv_make_support_nested_variables=no
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+  AM_V='$(V)'
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+else
+  AM_V=$AM_DEFAULT_VERBOSITY
+  AM_DEFAULT_V=$AM_DEFAULT_VERBOSITY
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+AC_SUBST([AM_V])dnl
+AM_SUBST_NOTMAKE([AM_V])dnl
+AC_SUBST([AM_DEFAULT_V])dnl
+AM_SUBST_NOTMAKE([AM_DEFAULT_V])dnl
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+AM_BACKSLASH='\'
+AC_SUBST([AM_BACKSLASH])dnl
+_AM_SUBST_NOTMAKE([AM_BACKSLASH])dnl
+])
+
+# Copyright (C) 2001-2017 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# AM_PROG_INSTALL_STRIP
+# ---------------------
+# One issue with vendor 'install' (even GNU) is that you can't
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+# is unlikely to handle the host's binaries.
+# Fortunately install-sh will honor a STRIPPROG variable, so we
+# always use install-sh in "make install-strip", and initialize
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+AC_DEFUN([AM_PROG_INSTALL_STRIP],
+[AC_REQUIRE([AM_PROG_INSTALL_SH])dnl
+# Installed binaries are usually stripped using 'strip' when the user
+# run "make install-strip".  However 'strip' might not be the right
+# tool to use in cross-compilation environments, therefore Automake
+# will honor the 'STRIP' environment variable to overrule this program.
+dnl Don't test for $cross_compiling = yes, because it might be 'maybe'.
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+  AC_CHECK_TOOL([STRIP], [strip], :)
+fi
+INSTALL_STRIP_PROGRAM="\$(install_sh) -c -s"
+AC_SUBST([INSTALL_STRIP_PROGRAM])])
+
+# Copyright (C) 2006-2017 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# _AM_SUBST_NOTMAKE(VARIABLE)
+# ---------------------------
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+AC_DEFUN([_AM_SUBST_NOTMAKE])
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+# AM_SUBST_NOTMAKE(VARIABLE)
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+AC_DEFUN([AM_SUBST_NOTMAKE], [_AM_SUBST_NOTMAKE($@)])
+
+# Check how to create a tarball.                            -*- Autoconf -*-
+
+# Copyright (C) 2004-2017 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# _AM_PROG_TAR(FORMAT)
+# --------------------
+# Check how to create a tarball in format FORMAT.
+# FORMAT should be one of 'v7', 'ustar', or 'pax'.
+#
+# Substitute a variable $(am__tar) that is a command
+# writing to stdout a FORMAT-tarball containing the directory
+# $tardir.
+#     tardir=directory && $(am__tar) > result.tar
+#
+# Substitute a variable $(am__untar) that extract such
+# a tarball read from stdin.
+#     $(am__untar) < result.tar
+#
+AC_DEFUN([_AM_PROG_TAR],
+[# Always define AMTAR for backward compatibility.  Yes, it's still used
+# in the wild :-(  We should find a proper way to deprecate it ...
+AC_SUBST([AMTAR], ['$${TAR-tar}'])
+
+# We'll loop over all known methods to create a tar archive until one works.
+_am_tools='gnutar m4_if([$1], [ustar], [plaintar]) pax cpio none'
+
+m4_if([$1], [v7],
+  [am__tar='$${TAR-tar} chof - "$$tardir"' am__untar='$${TAR-tar} xf -'],
+
+  [m4_case([$1],
+    [ustar],
+     [# The POSIX 1988 'ustar' format is defined with fixed-size fields.
+      # There is notably a 21 bits limit for the UID and the GID.  In fact,
+      # the 'pax' utility can hang on bigger UID/GID (see automake bug#8343
+      # and bug#13588).
+      am_max_uid=2097151 # 2^21 - 1
+      am_max_gid=$am_max_uid
+      # The $UID and $GID variables are not portable, so we need to resort
+      # to the POSIX-mandated id(1) utility.  Errors in the 'id' calls
+      # below are definitely unexpected, so allow the users to see them
+      # (that is, avoid stderr redirection).
+      am_uid=`id -u || echo unknown`
+      am_gid=`id -g || echo unknown`
+      AC_MSG_CHECKING([whether UID '$am_uid' is supported by ustar format])
+      if test $am_uid -le $am_max_uid; then
+         AC_MSG_RESULT([yes])
+      else
+         AC_MSG_RESULT([no])
+         _am_tools=none
+      fi
+      AC_MSG_CHECKING([whether GID '$am_gid' is supported by ustar format])
+      if test $am_gid -le $am_max_gid; then
+         AC_MSG_RESULT([yes])
+      else
+        AC_MSG_RESULT([no])
+        _am_tools=none
+      fi],
+
+  [pax],
+    [],
+
+  [m4_fatal([Unknown tar format])])
+
+  AC_MSG_CHECKING([how to create a $1 tar archive])
+
+  # Go ahead even if we have the value already cached.  We do so because we
+  # need to set the values for the 'am__tar' and 'am__untar' variables.
+  _am_tools=${am_cv_prog_tar_$1-$_am_tools}
+
+  for _am_tool in $_am_tools; do
+    case $_am_tool in
+    gnutar)
+      for _am_tar in tar gnutar gtar; do
+        AM_RUN_LOG([$_am_tar --version]) && break
+      done
+      am__tar="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$$tardir"'
+      am__tar_="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$tardir"'
+      am__untar="$_am_tar -xf -"
+      ;;
+    plaintar)
+      # Must skip GNU tar: if it does not support --format= it doesn't create
+      # ustar tarball either.
+      (tar --version) >/dev/null 2>&1 && continue
+      am__tar='tar chf - "$$tardir"'
+      am__tar_='tar chf - "$tardir"'
+      am__untar='tar xf -'
+      ;;
+    pax)
+      am__tar='pax -L -x $1 -w "$$tardir"'
+      am__tar_='pax -L -x $1 -w "$tardir"'
+      am__untar='pax -r'
+      ;;
+    cpio)
+      am__tar='find "$$tardir" -print | cpio -o -H $1 -L'
+      am__tar_='find "$tardir" -print | cpio -o -H $1 -L'
+      am__untar='cpio -i -H $1 -d'
+      ;;
+    none)
+      am__tar=false
+      am__tar_=false
+      am__untar=false
+      ;;
+    esac
+
+    # If the value was cached, stop now.  We just wanted to have am__tar
+    # and am__untar set.
+    test -n "${am_cv_prog_tar_$1}" && break
+
+    # tar/untar a dummy directory, and stop if the command works.
+    rm -rf conftest.dir
+    mkdir conftest.dir
+    echo GrepMe > conftest.dir/file
+    AM_RUN_LOG([tardir=conftest.dir && eval $am__tar_ >conftest.tar])
+    rm -rf conftest.dir
+    if test -s conftest.tar; then
+      AM_RUN_LOG([$am__untar <conftest.tar])
+      AM_RUN_LOG([cat conftest.dir/file])
+      grep GrepMe conftest.dir/file >/dev/null 2>&1 && break
+    fi
+  done
+  rm -rf conftest.dir
+
+  AC_CACHE_VAL([am_cv_prog_tar_$1], [am_cv_prog_tar_$1=$_am_tool])
+  AC_MSG_RESULT([$am_cv_prog_tar_$1])])
+
+AC_SUBST([am__tar])
+AC_SUBST([am__untar])
+]) # _AM_PROG_TAR
+
+m4_include([acinclude.m4])
diff --git a/src/third_party/unwind/dist/config/ar-lib b/src/third_party/unwind/dist/config/ar-lib
new file mode 100755
index 00000000000..05094d34c69
--- /dev/null
+++ b/src/third_party/unwind/dist/config/ar-lib
@@ -0,0 +1,270 @@
+#! /bin/sh
+# Wrapper for Microsoft lib.exe
+
+me=ar-lib
+scriptversion=2012-03-01.08; # UTC
+
+# Copyright (C) 2010-2017 Free Software Foundation, Inc.
+# Written by Peter Rosin <peda@lysator.liu.se>.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+# This file is maintained in Automake, please report
+# bugs to <bug-automake@gnu.org> or send patches to
+# <automake-patches@gnu.org>.
+
+
+# func_error message
+func_error ()
+{
+  echo "$me: $1" 1>&2
+  exit 1
+}
+
+file_conv=
+
+# func_file_conv build_file
+# Convert a $build file to $host form and store it in $file
+# Currently only supports Windows hosts.
+func_file_conv ()
+{
+  file=$1
+  case $file in
+    / | /[!/]*) # absolute file, and not a UNC file
+      if test -z "$file_conv"; then
+	# lazily determine how to convert abs files
+	case `uname -s` in
+	  MINGW*)
+	    file_conv=mingw
+	    ;;
+	  CYGWIN*)
+	    file_conv=cygwin
+	    ;;
+	  *)
+	    file_conv=wine
+	    ;;
+	esac
+      fi
+      case $file_conv in
+	mingw)
+	  file=`cmd //C echo "$file " | sed -e 's/"\(.*\) " *$/\1/'`
+	  ;;
+	cygwin)
+	  file=`cygpath -m "$file" || echo "$file"`
+	  ;;
+	wine)
+	  file=`winepath -w "$file" || echo "$file"`
+	  ;;
+      esac
+      ;;
+  esac
+}
+
+# func_at_file at_file operation archive
+# Iterate over all members in AT_FILE performing OPERATION on ARCHIVE
+# for each of them.
+# When interpreting the content of the @FILE, do NOT use func_file_conv,
+# since the user would need to supply preconverted file names to
+# binutils ar, at least for MinGW.
+func_at_file ()
+{
+  operation=$2
+  archive=$3
+  at_file_contents=`cat "$1"`
+  eval set x "$at_file_contents"
+  shift
+
+  for member
+  do
+    $AR -NOLOGO $operation:"$member" "$archive" || exit $?
+  done
+}
+
+case $1 in
+  '')
+     func_error "no command.  Try '$0 --help' for more information."
+     ;;
+  -h | --h*)
+    cat <<EOF
+Usage: $me [--help] [--version] PROGRAM ACTION ARCHIVE [MEMBER...]
+
+Members may be specified in a file named with @FILE.
+EOF
+    exit $?
+    ;;
+  -v | --v*)
+    echo "$me, version $scriptversion"
+    exit $?
+    ;;
+esac
+
+if test $# -lt 3; then
+  func_error "you must specify a program, an action and an archive"
+fi
+
+AR=$1
+shift
+while :
+do
+  if test $# -lt 2; then
+    func_error "you must specify a program, an action and an archive"
+  fi
+  case $1 in
+    -lib | -LIB \
+    | -ltcg | -LTCG \
+    | -machine* | -MACHINE* \
+    | -subsystem* | -SUBSYSTEM* \
+    | -verbose | -VERBOSE \
+    | -wx* | -WX* )
+      AR="$AR $1"
+      shift
+      ;;
+    *)
+      action=$1
+      shift
+      break
+      ;;
+  esac
+done
+orig_archive=$1
+shift
+func_file_conv "$orig_archive"
+archive=$file
+
+# strip leading dash in $action
+action=${action#-}
+
+delete=
+extract=
+list=
+quick=
+replace=
+index=
+create=
+
+while test -n "$action"
+do
+  case $action in
+    d*) delete=yes  ;;
+    x*) extract=yes ;;
+    t*) list=yes    ;;
+    q*) quick=yes   ;;
+    r*) replace=yes ;;
+    s*) index=yes   ;;
+    S*)             ;; # the index is always updated implicitly
+    c*) create=yes  ;;
+    u*)             ;; # TODO: don't ignore the update modifier
+    v*)             ;; # TODO: don't ignore the verbose modifier
+    *)
+      func_error "unknown action specified"
+      ;;
+  esac
+  action=${action#?}
+done
+
+case $delete$extract$list$quick$replace,$index in
+  yes,* | ,yes)
+    ;;
+  yesyes*)
+    func_error "more than one action specified"
+    ;;
+  *)
+    func_error "no action specified"
+    ;;
+esac
+
+if test -n "$delete"; then
+  if test ! -f "$orig_archive"; then
+    func_error "archive not found"
+  fi
+  for member
+  do
+    case $1 in
+      @*)
+        func_at_file "${1#@}" -REMOVE "$archive"
+        ;;
+      *)
+        func_file_conv "$1"
+        $AR -NOLOGO -REMOVE:"$file" "$archive" || exit $?
+        ;;
+    esac
+  done
+
+elif test -n "$extract"; then
+  if test ! -f "$orig_archive"; then
+    func_error "archive not found"
+  fi
+  if test $# -gt 0; then
+    for member
+    do
+      case $1 in
+        @*)
+          func_at_file "${1#@}" -EXTRACT "$archive"
+          ;;
+        *)
+          func_file_conv "$1"
+          $AR -NOLOGO -EXTRACT:"$file" "$archive" || exit $?
+          ;;
+      esac
+    done
+  else
+    $AR -NOLOGO -LIST "$archive" | sed -e 's/\\/\\\\/g' | while read member
+    do
+      $AR -NOLOGO -EXTRACT:"$member" "$archive" || exit $?
+    done
+  fi
+
+elif test -n "$quick$replace"; then
+  if test ! -f "$orig_archive"; then
+    if test -z "$create"; then
+      echo "$me: creating $orig_archive"
+    fi
+    orig_archive=
+  else
+    orig_archive=$archive
+  fi
+
+  for member
+  do
+    case $1 in
+    @*)
+      func_file_conv "${1#@}"
+      set x "$@" "@$file"
+      ;;
+    *)
+      func_file_conv "$1"
+      set x "$@" "$file"
+      ;;
+    esac
+    shift
+    shift
+  done
+
+  if test -n "$orig_archive"; then
+    $AR -NOLOGO -OUT:"$archive" "$orig_archive" "$@" || exit $?
+  else
+    $AR -NOLOGO -OUT:"$archive" "$@" || exit $?
+  fi
+
+elif test -n "$list"; then
+  if test ! -f "$orig_archive"; then
+    func_error "archive not found"
+  fi
+  $AR -NOLOGO -LIST "$archive" || exit $?
+fi
diff --git a/src/third_party/unwind/dist/config/compile b/src/third_party/unwind/dist/config/compile
new file mode 100755
index 00000000000..a85b723c7e6
--- /dev/null
+++ b/src/third_party/unwind/dist/config/compile
@@ -0,0 +1,347 @@
+#! /bin/sh
+# Wrapper for compilers which do not understand '-c -o'.
+
+scriptversion=2012-10-14.11; # UTC
+
+# Copyright (C) 1999-2014 Free Software Foundation, Inc.
+# Written by Tom Tromey <tromey@cygnus.com>.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+# This file is maintained in Automake, please report
+# bugs to <bug-automake@gnu.org> or send patches to
+# <automake-patches@gnu.org>.
+
+nl='
+'
+
+# We need space, tab and new line, in precisely that order.  Quoting is
+# there to prevent tools from complaining about whitespace usage.
+IFS=" ""	$nl"
+
+file_conv=
+
+# func_file_conv build_file lazy
+# Convert a $build file to $host form and store it in $file
+# Currently only supports Windows hosts. If the determined conversion
+# type is listed in (the comma separated) LAZY, no conversion will
+# take place.
+func_file_conv ()
+{
+  file=$1
+  case $file in
+    / | /[!/]*) # absolute file, and not a UNC file
+      if test -z "$file_conv"; then
+	# lazily determine how to convert abs files
+	case `uname -s` in
+	  MINGW*)
+	    file_conv=mingw
+	    ;;
+	  CYGWIN*)
+	    file_conv=cygwin
+	    ;;
+	  *)
+	    file_conv=wine
+	    ;;
+	esac
+      fi
+      case $file_conv/,$2, in
+	*,$file_conv,*)
+	  ;;
+	mingw/*)
+	  file=`cmd //C echo "$file " | sed -e 's/"\(.*\) " *$/\1/'`
+	  ;;
+	cygwin/*)
+	  file=`cygpath -m "$file" || echo "$file"`
+	  ;;
+	wine/*)
+	  file=`winepath -w "$file" || echo "$file"`
+	  ;;
+      esac
+      ;;
+  esac
+}
+
+# func_cl_dashL linkdir
+# Make cl look for libraries in LINKDIR
+func_cl_dashL ()
+{
+  func_file_conv "$1"
+  if test -z "$lib_path"; then
+    lib_path=$file
+  else
+    lib_path="$lib_path;$file"
+  fi
+  linker_opts="$linker_opts -LIBPATH:$file"
+}
+
+# func_cl_dashl library
+# Do a library search-path lookup for cl
+func_cl_dashl ()
+{
+  lib=$1
+  found=no
+  save_IFS=$IFS
+  IFS=';'
+  for dir in $lib_path $LIB
+  do
+    IFS=$save_IFS
+    if $shared && test -f "$dir/$lib.dll.lib"; then
+      found=yes
+      lib=$dir/$lib.dll.lib
+      break
+    fi
+    if test -f "$dir/$lib.lib"; then
+      found=yes
+      lib=$dir/$lib.lib
+      break
+    fi
+    if test -f "$dir/lib$lib.a"; then
+      found=yes
+      lib=$dir/lib$lib.a
+      break
+    fi
+  done
+  IFS=$save_IFS
+
+  if test "$found" != yes; then
+    lib=$lib.lib
+  fi
+}
+
+# func_cl_wrapper cl arg...
+# Adjust compile command to suit cl
+func_cl_wrapper ()
+{
+  # Assume a capable shell
+  lib_path=
+  shared=:
+  linker_opts=
+  for arg
+  do
+    if test -n "$eat"; then
+      eat=
+    else
+      case $1 in
+	-o)
+	  # configure might choose to run compile as 'compile cc -o foo foo.c'.
+	  eat=1
+	  case $2 in
+	    *.o | *.[oO][bB][jJ])
+	      func_file_conv "$2"
+	      set x "$@" -Fo"$file"
+	      shift
+	      ;;
+	    *)
+	      func_file_conv "$2"
+	      set x "$@" -Fe"$file"
+	      shift
+	      ;;
+	  esac
+	  ;;
+	-I)
+	  eat=1
+	  func_file_conv "$2" mingw
+	  set x "$@" -I"$file"
+	  shift
+	  ;;
+	-I*)
+	  func_file_conv "${1#-I}" mingw
+	  set x "$@" -I"$file"
+	  shift
+	  ;;
+	-l)
+	  eat=1
+	  func_cl_dashl "$2"
+	  set x "$@" "$lib"
+	  shift
+	  ;;
+	-l*)
+	  func_cl_dashl "${1#-l}"
+	  set x "$@" "$lib"
+	  shift
+	  ;;
+	-L)
+	  eat=1
+	  func_cl_dashL "$2"
+	  ;;
+	-L*)
+	  func_cl_dashL "${1#-L}"
+	  ;;
+	-static)
+	  shared=false
+	  ;;
+	-Wl,*)
+	  arg=${1#-Wl,}
+	  save_ifs="$IFS"; IFS=','
+	  for flag in $arg; do
+	    IFS="$save_ifs"
+	    linker_opts="$linker_opts $flag"
+	  done
+	  IFS="$save_ifs"
+	  ;;
+	-Xlinker)
+	  eat=1
+	  linker_opts="$linker_opts $2"
+	  ;;
+	-*)
+	  set x "$@" "$1"
+	  shift
+	  ;;
+	*.cc | *.CC | *.cxx | *.CXX | *.[cC]++)
+	  func_file_conv "$1"
+	  set x "$@" -Tp"$file"
+	  shift
+	  ;;
+	*.c | *.cpp | *.CPP | *.lib | *.LIB | *.Lib | *.OBJ | *.obj | *.[oO])
+	  func_file_conv "$1" mingw
+	  set x "$@" "$file"
+	  shift
+	  ;;
+	*)
+	  set x "$@" "$1"
+	  shift
+	  ;;
+      esac
+    fi
+    shift
+  done
+  if test -n "$linker_opts"; then
+    linker_opts="-link$linker_opts"
+  fi
+  exec "$@" $linker_opts
+  exit 1
+}
+
+eat=
+
+case $1 in
+  '')
+     echo "$0: No command.  Try '$0 --help' for more information." 1>&2
+     exit 1;
+     ;;
+  -h | --h*)
+    cat <<\EOF
+Usage: compile [--help] [--version] PROGRAM [ARGS]
+
+Wrapper for compilers which do not understand '-c -o'.
+Remove '-o dest.o' from ARGS, run PROGRAM with the remaining
+arguments, and rename the output as expected.
+
+If you are trying to build a whole package this is not the
+right script to run: please start by reading the file 'INSTALL'.
+
+Report bugs to <bug-automake@gnu.org>.
+EOF
+    exit $?
+    ;;
+  -v | --v*)
+    echo "compile $scriptversion"
+    exit $?
+    ;;
+  cl | *[/\\]cl | cl.exe | *[/\\]cl.exe )
+    func_cl_wrapper "$@"      # Doesn't return...
+    ;;
+esac
+
+ofile=
+cfile=
+
+for arg
+do
+  if test -n "$eat"; then
+    eat=
+  else
+    case $1 in
+      -o)
+	# configure might choose to run compile as 'compile cc -o foo foo.c'.
+	# So we strip '-o arg' only if arg is an object.
+	eat=1
+	case $2 in
+	  *.o | *.obj)
+	    ofile=$2
+	    ;;
+	  *)
+	    set x "$@" -o "$2"
+	    shift
+	    ;;
+	esac
+	;;
+      *.c)
+	cfile=$1
+	set x "$@" "$1"
+	shift
+	;;
+      *)
+	set x "$@" "$1"
+	shift
+	;;
+    esac
+  fi
+  shift
+done
+
+if test -z "$ofile" || test -z "$cfile"; then
+  # If no '-o' option was seen then we might have been invoked from a
+  # pattern rule where we don't need one.  That is ok -- this is a
+  # normal compilation that the losing compiler can handle.  If no
+  # '.c' file was seen then we are probably linking.  That is also
+  # ok.
+  exec "$@"
+fi
+
+# Name of file we expect compiler to create.
+cofile=`echo "$cfile" | sed 's|^.*[\\/]||; s|^[a-zA-Z]:||; s/\.c$/.o/'`
+
+# Create the lock directory.
+# Note: use '[/\\:.-]' here to ensure that we don't use the same name
+# that we are using for the .o file.  Also, base the name on the expected
+# object file name, since that is what matters with a parallel build.
+lockdir=`echo "$cofile" | sed -e 's|[/\\:.-]|_|g'`.d
+while true; do
+  if mkdir "$lockdir" >/dev/null 2>&1; then
+    break
+  fi
+  sleep 1
+done
+# FIXME: race condition here if user kills between mkdir and trap.
+trap "rmdir '$lockdir'; exit 1" 1 2 15
+
+# Run the compile.
+"$@"
+ret=$?
+
+if test -f "$cofile"; then
+  test "$cofile" = "$ofile" || mv "$cofile" "$ofile"
+elif test -f "${cofile}bj"; then
+  test "${cofile}bj" = "$ofile" || mv "${cofile}bj" "$ofile"
+fi
+
+rmdir "$lockdir"
+exit $ret
+
+# Local Variables:
+# mode: shell-script
+# sh-indentation: 2
+# eval: (add-hook 'write-file-hooks 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC"
+# time-stamp-end: "; # UTC"
+# End:
diff --git a/src/third_party/unwind/dist/config/config.guess b/src/third_party/unwind/dist/config/config.guess
new file mode 100755
index 00000000000..f50dcdb6de2
--- /dev/null
+++ b/src/third_party/unwind/dist/config/config.guess
@@ -0,0 +1,1480 @@
+#! /bin/sh
+# Attempt to guess a canonical system name.
+#   Copyright 1992-2018 Free Software Foundation, Inc.
+
+timestamp='2018-02-24'
+
+# This file is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, see <https://www.gnu.org/licenses/>.
+#
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that
+# program.  This Exception is an additional permission under section 7
+# of the GNU General Public License, version 3 ("GPLv3").
+#
+# Originally written by Per Bothner; maintained since 2000 by Ben Elliston.
+#
+# You can get the latest version of this script from:
+# https://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.guess
+#
+# Please send patches to <config-patches@gnu.org>.
+
+
+me=`echo "$0" | sed -e 's,.*/,,'`
+
+usage="\
+Usage: $0 [OPTION]
+
+Output the configuration name of the system \`$me' is run on.
+
+Options:
+  -h, --help         print this help, then exit
+  -t, --time-stamp   print date of last modification, then exit
+  -v, --version      print version number, then exit
+
+Report bugs and patches to <config-patches@gnu.org>."
+
+version="\
+GNU config.guess ($timestamp)
+
+Originally written by Per Bothner.
+Copyright 1992-2018 Free Software Foundation, Inc.
+
+This is free software; see the source for copying conditions.  There is NO
+warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."
+
+help="
+Try \`$me --help' for more information."
+
+# Parse command line
+while test $# -gt 0 ; do
+  case $1 in
+    --time-stamp | --time* | -t )
+       echo "$timestamp" ; exit ;;
+    --version | -v )
+       echo "$version" ; exit ;;
+    --help | --h* | -h )
+       echo "$usage"; exit ;;
+    -- )     # Stop option processing
+       shift; break ;;
+    - )	# Use stdin as input.
+       break ;;
+    -* )
+       echo "$me: invalid option $1$help" >&2
+       exit 1 ;;
+    * )
+       break ;;
+  esac
+done
+
+if test $# != 0; then
+  echo "$me: too many arguments$help" >&2
+  exit 1
+fi
+
+trap 'exit 1' 1 2 15
+
+# CC_FOR_BUILD -- compiler used by this script. Note that the use of a
+# compiler to aid in system detection is discouraged as it requires
+# temporary files to be created and, as you can see below, it is a
+# headache to deal with in a portable fashion.
+
+# Historically, `CC_FOR_BUILD' used to be named `HOST_CC'. We still
+# use `HOST_CC' if defined, but it is deprecated.
+
+# Portable tmp directory creation inspired by the Autoconf team.
+
+set_cc_for_build='
+trap "exitcode=\$?; (rm -f \$tmpfiles 2>/dev/null; rmdir \$tmp 2>/dev/null) && exit \$exitcode" 0 ;
+trap "rm -f \$tmpfiles 2>/dev/null; rmdir \$tmp 2>/dev/null; exit 1" 1 2 13 15 ;
+: ${TMPDIR=/tmp} ;
+ { tmp=`(umask 077 && mktemp -d "$TMPDIR/cgXXXXXX") 2>/dev/null` && test -n "$tmp" && test -d "$tmp" ; } ||
+ { test -n "$RANDOM" && tmp=$TMPDIR/cg$$-$RANDOM && (umask 077 && mkdir $tmp) ; } ||
+ { tmp=$TMPDIR/cg-$$ && (umask 077 && mkdir $tmp) && echo "Warning: creating insecure temp directory" >&2 ; } ||
+ { echo "$me: cannot create a temporary directory in $TMPDIR" >&2 ; exit 1 ; } ;
+dummy=$tmp/dummy ;
+tmpfiles="$dummy.c $dummy.o $dummy.rel $dummy" ;
+case $CC_FOR_BUILD,$HOST_CC,$CC in
+ ,,)    echo "int x;" > "$dummy.c" ;
+	for c in cc gcc c89 c99 ; do
+	  if ($c -c -o "$dummy.o" "$dummy.c") >/dev/null 2>&1 ; then
+	     CC_FOR_BUILD="$c"; break ;
+	  fi ;
+	done ;
+	if test x"$CC_FOR_BUILD" = x ; then
+	  CC_FOR_BUILD=no_compiler_found ;
+	fi
+	;;
+ ,,*)   CC_FOR_BUILD=$CC ;;
+ ,*,*)  CC_FOR_BUILD=$HOST_CC ;;
+esac ; set_cc_for_build= ;'
+
+# This is needed to find uname on a Pyramid OSx when run in the BSD universe.
+# (ghazi@noc.rutgers.edu 1994-08-24)
+if (test -f /.attbin/uname) >/dev/null 2>&1 ; then
+	PATH=$PATH:/.attbin ; export PATH
+fi
+
+UNAME_MACHINE=`(uname -m) 2>/dev/null` || UNAME_MACHINE=unknown
+UNAME_RELEASE=`(uname -r) 2>/dev/null` || UNAME_RELEASE=unknown
+UNAME_SYSTEM=`(uname -s) 2>/dev/null`  || UNAME_SYSTEM=unknown
+UNAME_VERSION=`(uname -v) 2>/dev/null` || UNAME_VERSION=unknown
+
+case "$UNAME_SYSTEM" in
+Linux|GNU|GNU/*)
+	# If the system lacks a compiler, then just pick glibc.
+	# We could probably try harder.
+	LIBC=gnu
+
+	eval "$set_cc_for_build"
+	cat <<-EOF > "$dummy.c"
+	#include <features.h>
+	#if defined(__UCLIBC__)
+	LIBC=uclibc
+	#elif defined(__dietlibc__)
+	LIBC=dietlibc
+	#else
+	LIBC=gnu
+	#endif
+	EOF
+	eval "`$CC_FOR_BUILD -E "$dummy.c" 2>/dev/null | grep '^LIBC' | sed 's, ,,g'`"
+
+	# If ldd exists, use it to detect musl libc.
+	if command -v ldd >/dev/null && \
+		ldd --version 2>&1 | grep -q ^musl
+	then
+	    LIBC=musl
+	fi
+	;;
+esac
+
+# Note: order is significant - the case branches are not exclusive.
+
+case "$UNAME_MACHINE:$UNAME_SYSTEM:$UNAME_RELEASE:$UNAME_VERSION" in
+    *:NetBSD:*:*)
+	# NetBSD (nbsd) targets should (where applicable) match one or
+	# more of the tuples: *-*-netbsdelf*, *-*-netbsdaout*,
+	# *-*-netbsdecoff* and *-*-netbsd*.  For targets that recently
+	# switched to ELF, *-*-netbsd* would select the old
+	# object file format.  This provides both forward
+	# compatibility and a consistent mechanism for selecting the
+	# object file format.
+	#
+	# Note: NetBSD doesn't particularly care about the vendor
+	# portion of the name.  We always set it to "unknown".
+	sysctl="sysctl -n hw.machine_arch"
+	UNAME_MACHINE_ARCH=`(uname -p 2>/dev/null || \
+	    "/sbin/$sysctl" 2>/dev/null || \
+	    "/usr/sbin/$sysctl" 2>/dev/null || \
+	    echo unknown)`
+	case "$UNAME_MACHINE_ARCH" in
+	    armeb) machine=armeb-unknown ;;
+	    arm*) machine=arm-unknown ;;
+	    sh3el) machine=shl-unknown ;;
+	    sh3eb) machine=sh-unknown ;;
+	    sh5el) machine=sh5le-unknown ;;
+	    earmv*)
+		arch=`echo "$UNAME_MACHINE_ARCH" | sed -e 's,^e\(armv[0-9]\).*$,\1,'`
+		endian=`echo "$UNAME_MACHINE_ARCH" | sed -ne 's,^.*\(eb\)$,\1,p'`
+		machine="${arch}${endian}"-unknown
+		;;
+	    *) machine="$UNAME_MACHINE_ARCH"-unknown ;;
+	esac
+	# The Operating System including object format, if it has switched
+	# to ELF recently (or will in the future) and ABI.
+	case "$UNAME_MACHINE_ARCH" in
+	    earm*)
+		os=netbsdelf
+		;;
+	    arm*|i386|m68k|ns32k|sh3*|sparc|vax)
+		eval "$set_cc_for_build"
+		if echo __ELF__ | $CC_FOR_BUILD -E - 2>/dev/null \
+			| grep -q __ELF__
+		then
+		    # Once all utilities can be ECOFF (netbsdecoff) or a.out (netbsdaout).
+		    # Return netbsd for either.  FIX?
+		    os=netbsd
+		else
+		    os=netbsdelf
+		fi
+		;;
+	    *)
+		os=netbsd
+		;;
+	esac
+	# Determine ABI tags.
+	case "$UNAME_MACHINE_ARCH" in
+	    earm*)
+		expr='s/^earmv[0-9]/-eabi/;s/eb$//'
+		abi=`echo "$UNAME_MACHINE_ARCH" | sed -e "$expr"`
+		;;
+	esac
+	# The OS release
+	# Debian GNU/NetBSD machines have a different userland, and
+	# thus, need a distinct triplet. However, they do not need
+	# kernel version information, so it can be replaced with a
+	# suitable tag, in the style of linux-gnu.
+	case "$UNAME_VERSION" in
+	    Debian*)
+		release='-gnu'
+		;;
+	    *)
+		release=`echo "$UNAME_RELEASE" | sed -e 's/[-_].*//' | cut -d. -f1,2`
+		;;
+	esac
+	# Since CPU_TYPE-MANUFACTURER-KERNEL-OPERATING_SYSTEM:
+	# contains redundant information, the shorter form:
+	# CPU_TYPE-MANUFACTURER-OPERATING_SYSTEM is used.
+	echo "$machine-${os}${release}${abi}"
+	exit ;;
+    *:Bitrig:*:*)
+	UNAME_MACHINE_ARCH=`arch | sed 's/Bitrig.//'`
+	echo "$UNAME_MACHINE_ARCH"-unknown-bitrig"$UNAME_RELEASE"
+	exit ;;
+    *:OpenBSD:*:*)
+	UNAME_MACHINE_ARCH=`arch | sed 's/OpenBSD.//'`
+	echo "$UNAME_MACHINE_ARCH"-unknown-openbsd"$UNAME_RELEASE"
+	exit ;;
+    *:LibertyBSD:*:*)
+	UNAME_MACHINE_ARCH=`arch | sed 's/^.*BSD\.//'`
+	echo "$UNAME_MACHINE_ARCH"-unknown-libertybsd"$UNAME_RELEASE"
+	exit ;;
+    *:MidnightBSD:*:*)
+	echo "$UNAME_MACHINE"-unknown-midnightbsd"$UNAME_RELEASE"
+	exit ;;
+    *:ekkoBSD:*:*)
+	echo "$UNAME_MACHINE"-unknown-ekkobsd"$UNAME_RELEASE"
+	exit ;;
+    *:SolidBSD:*:*)
+	echo "$UNAME_MACHINE"-unknown-solidbsd"$UNAME_RELEASE"
+	exit ;;
+    macppc:MirBSD:*:*)
+	echo powerpc-unknown-mirbsd"$UNAME_RELEASE"
+	exit ;;
+    *:MirBSD:*:*)
+	echo "$UNAME_MACHINE"-unknown-mirbsd"$UNAME_RELEASE"
+	exit ;;
+    *:Sortix:*:*)
+	echo "$UNAME_MACHINE"-unknown-sortix
+	exit ;;
+    *:Redox:*:*)
+	echo "$UNAME_MACHINE"-unknown-redox
+	exit ;;
+    mips:OSF1:*.*)
+        echo mips-dec-osf1
+        exit ;;
+    alpha:OSF1:*:*)
+	case $UNAME_RELEASE in
+	*4.0)
+		UNAME_RELEASE=`/usr/sbin/sizer -v | awk '{print $3}'`
+		;;
+	*5.*)
+		UNAME_RELEASE=`/usr/sbin/sizer -v | awk '{print $4}'`
+		;;
+	esac
+	# According to Compaq, /usr/sbin/psrinfo has been available on
+	# OSF/1 and Tru64 systems produced since 1995.  I hope that
+	# covers most systems running today.  This code pipes the CPU
+	# types through head -n 1, so we only detect the type of CPU 0.
+	ALPHA_CPU_TYPE=`/usr/sbin/psrinfo -v | sed -n -e 's/^  The alpha \(.*\) processor.*$/\1/p' | head -n 1`
+	case "$ALPHA_CPU_TYPE" in
+	    "EV4 (21064)")
+		UNAME_MACHINE=alpha ;;
+	    "EV4.5 (21064)")
+		UNAME_MACHINE=alpha ;;
+	    "LCA4 (21066/21068)")
+		UNAME_MACHINE=alpha ;;
+	    "EV5 (21164)")
+		UNAME_MACHINE=alphaev5 ;;
+	    "EV5.6 (21164A)")
+		UNAME_MACHINE=alphaev56 ;;
+	    "EV5.6 (21164PC)")
+		UNAME_MACHINE=alphapca56 ;;
+	    "EV5.7 (21164PC)")
+		UNAME_MACHINE=alphapca57 ;;
+	    "EV6 (21264)")
+		UNAME_MACHINE=alphaev6 ;;
+	    "EV6.7 (21264A)")
+		UNAME_MACHINE=alphaev67 ;;
+	    "EV6.8CB (21264C)")
+		UNAME_MACHINE=alphaev68 ;;
+	    "EV6.8AL (21264B)")
+		UNAME_MACHINE=alphaev68 ;;
+	    "EV6.8CX (21264D)")
+		UNAME_MACHINE=alphaev68 ;;
+	    "EV6.9A (21264/EV69A)")
+		UNAME_MACHINE=alphaev69 ;;
+	    "EV7 (21364)")
+		UNAME_MACHINE=alphaev7 ;;
+	    "EV7.9 (21364A)")
+		UNAME_MACHINE=alphaev79 ;;
+	esac
+	# A Pn.n version is a patched version.
+	# A Vn.n version is a released version.
+	# A Tn.n version is a released field test version.
+	# A Xn.n version is an unreleased experimental baselevel.
+	# 1.2 uses "1.2" for uname -r.
+	echo "$UNAME_MACHINE"-dec-osf"`echo "$UNAME_RELEASE" | sed -e 's/^[PVTX]//' | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz`"
+	# Reset EXIT trap before exiting to avoid spurious non-zero exit code.
+	exitcode=$?
+	trap '' 0
+	exit $exitcode ;;
+    Amiga*:UNIX_System_V:4.0:*)
+	echo m68k-unknown-sysv4
+	exit ;;
+    *:[Aa]miga[Oo][Ss]:*:*)
+	echo "$UNAME_MACHINE"-unknown-amigaos
+	exit ;;
+    *:[Mm]orph[Oo][Ss]:*:*)
+	echo "$UNAME_MACHINE"-unknown-morphos
+	exit ;;
+    *:OS/390:*:*)
+	echo i370-ibm-openedition
+	exit ;;
+    *:z/VM:*:*)
+	echo s390-ibm-zvmoe
+	exit ;;
+    *:OS400:*:*)
+	echo powerpc-ibm-os400
+	exit ;;
+    arm:RISC*:1.[012]*:*|arm:riscix:1.[012]*:*)
+	echo arm-acorn-riscix"$UNAME_RELEASE"
+	exit ;;
+    arm*:riscos:*:*|arm*:RISCOS:*:*)
+	echo arm-unknown-riscos
+	exit ;;
+    SR2?01:HI-UX/MPP:*:* | SR8000:HI-UX/MPP:*:*)
+	echo hppa1.1-hitachi-hiuxmpp
+	exit ;;
+    Pyramid*:OSx*:*:* | MIS*:OSx*:*:* | MIS*:SMP_DC-OSx*:*:*)
+	# akee@wpdis03.wpafb.af.mil (Earle F. Ake) contributed MIS and NILE.
+	if test "`(/bin/universe) 2>/dev/null`" = att ; then
+		echo pyramid-pyramid-sysv3
+	else
+		echo pyramid-pyramid-bsd
+	fi
+	exit ;;
+    NILE*:*:*:dcosx)
+	echo pyramid-pyramid-svr4
+	exit ;;
+    DRS?6000:unix:4.0:6*)
+	echo sparc-icl-nx6
+	exit ;;
+    DRS?6000:UNIX_SV:4.2*:7* | DRS?6000:isis:4.2*:7*)
+	case `/usr/bin/uname -p` in
+	    sparc) echo sparc-icl-nx7; exit ;;
+	esac ;;
+    s390x:SunOS:*:*)
+	echo "$UNAME_MACHINE"-ibm-solaris2"`echo "$UNAME_RELEASE" | sed -e 's/[^.]*//'`"
+	exit ;;
+    sun4H:SunOS:5.*:*)
+	echo sparc-hal-solaris2"`echo "$UNAME_RELEASE"|sed -e 's/[^.]*//'`"
+	exit ;;
+    sun4*:SunOS:5.*:* | tadpole*:SunOS:5.*:*)
+	echo sparc-sun-solaris2"`echo "$UNAME_RELEASE" | sed -e 's/[^.]*//'`"
+	exit ;;
+    i86pc:AuroraUX:5.*:* | i86xen:AuroraUX:5.*:*)
+	echo i386-pc-auroraux"$UNAME_RELEASE"
+	exit ;;
+    i86pc:SunOS:5.*:* | i86xen:SunOS:5.*:*)
+	eval "$set_cc_for_build"
+	SUN_ARCH=i386
+	# If there is a compiler, see if it is configured for 64-bit objects.
+	# Note that the Sun cc does not turn __LP64__ into 1 like gcc does.
+	# This test works for both compilers.
+	if [ "$CC_FOR_BUILD" != no_compiler_found ]; then
+	    if (echo '#ifdef __amd64'; echo IS_64BIT_ARCH; echo '#endif') | \
+		(CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | \
+		grep IS_64BIT_ARCH >/dev/null
+	    then
+		SUN_ARCH=x86_64
+	    fi
+	fi
+	echo "$SUN_ARCH"-pc-solaris2"`echo "$UNAME_RELEASE"|sed -e 's/[^.]*//'`"
+	exit ;;
+    sun4*:SunOS:6*:*)
+	# According to config.sub, this is the proper way to canonicalize
+	# SunOS6.  Hard to guess exactly what SunOS6 will be like, but
+	# it's likely to be more like Solaris than SunOS4.
+	echo sparc-sun-solaris3"`echo "$UNAME_RELEASE"|sed -e 's/[^.]*//'`"
+	exit ;;
+    sun4*:SunOS:*:*)
+	case "`/usr/bin/arch -k`" in
+	    Series*|S4*)
+		UNAME_RELEASE=`uname -v`
+		;;
+	esac
+	# Japanese Language versions have a version number like `4.1.3-JL'.
+	echo sparc-sun-sunos"`echo "$UNAME_RELEASE"|sed -e 's/-/_/'`"
+	exit ;;
+    sun3*:SunOS:*:*)
+	echo m68k-sun-sunos"$UNAME_RELEASE"
+	exit ;;
+    sun*:*:4.2BSD:*)
+	UNAME_RELEASE=`(sed 1q /etc/motd | awk '{print substr($5,1,3)}') 2>/dev/null`
+	test "x$UNAME_RELEASE" = x && UNAME_RELEASE=3
+	case "`/bin/arch`" in
+	    sun3)
+		echo m68k-sun-sunos"$UNAME_RELEASE"
+		;;
+	    sun4)
+		echo sparc-sun-sunos"$UNAME_RELEASE"
+		;;
+	esac
+	exit ;;
+    aushp:SunOS:*:*)
+	echo sparc-auspex-sunos"$UNAME_RELEASE"
+	exit ;;
+    # The situation for MiNT is a little confusing.  The machine name
+    # can be virtually everything (everything which is not
+    # "atarist" or "atariste" at least should have a processor
+    # > m68000).  The system name ranges from "MiNT" over "FreeMiNT"
+    # to the lowercase version "mint" (or "freemint").  Finally
+    # the system name "TOS" denotes a system which is actually not
+    # MiNT.  But MiNT is downward compatible to TOS, so this should
+    # be no problem.
+    atarist[e]:*MiNT:*:* | atarist[e]:*mint:*:* | atarist[e]:*TOS:*:*)
+	echo m68k-atari-mint"$UNAME_RELEASE"
+	exit ;;
+    atari*:*MiNT:*:* | atari*:*mint:*:* | atarist[e]:*TOS:*:*)
+	echo m68k-atari-mint"$UNAME_RELEASE"
+	exit ;;
+    *falcon*:*MiNT:*:* | *falcon*:*mint:*:* | *falcon*:*TOS:*:*)
+	echo m68k-atari-mint"$UNAME_RELEASE"
+	exit ;;
+    milan*:*MiNT:*:* | milan*:*mint:*:* | *milan*:*TOS:*:*)
+	echo m68k-milan-mint"$UNAME_RELEASE"
+	exit ;;
+    hades*:*MiNT:*:* | hades*:*mint:*:* | *hades*:*TOS:*:*)
+	echo m68k-hades-mint"$UNAME_RELEASE"
+	exit ;;
+    *:*MiNT:*:* | *:*mint:*:* | *:*TOS:*:*)
+	echo m68k-unknown-mint"$UNAME_RELEASE"
+	exit ;;
+    m68k:machten:*:*)
+	echo m68k-apple-machten"$UNAME_RELEASE"
+	exit ;;
+    powerpc:machten:*:*)
+	echo powerpc-apple-machten"$UNAME_RELEASE"
+	exit ;;
+    RISC*:Mach:*:*)
+	echo mips-dec-mach_bsd4.3
+	exit ;;
+    RISC*:ULTRIX:*:*)
+	echo mips-dec-ultrix"$UNAME_RELEASE"
+	exit ;;
+    VAX*:ULTRIX*:*:*)
+	echo vax-dec-ultrix"$UNAME_RELEASE"
+	exit ;;
+    2020:CLIX:*:* | 2430:CLIX:*:*)
+	echo clipper-intergraph-clix"$UNAME_RELEASE"
+	exit ;;
+    mips:*:*:UMIPS | mips:*:*:RISCos)
+	eval "$set_cc_for_build"
+	sed 's/^	//' << EOF > "$dummy.c"
+#ifdef __cplusplus
+#include <stdio.h>  /* for printf() prototype */
+	int main (int argc, char *argv[]) {
+#else
+	int main (argc, argv) int argc; char *argv[]; {
+#endif
+	#if defined (host_mips) && defined (MIPSEB)
+	#if defined (SYSTYPE_SYSV)
+	  printf ("mips-mips-riscos%ssysv\\n", argv[1]); exit (0);
+	#endif
+	#if defined (SYSTYPE_SVR4)
+	  printf ("mips-mips-riscos%ssvr4\\n", argv[1]); exit (0);
+	#endif
+	#if defined (SYSTYPE_BSD43) || defined(SYSTYPE_BSD)
+	  printf ("mips-mips-riscos%sbsd\\n", argv[1]); exit (0);
+	#endif
+	#endif
+	  exit (-1);
+	}
+EOF
+	$CC_FOR_BUILD -o "$dummy" "$dummy.c" &&
+	  dummyarg=`echo "$UNAME_RELEASE" | sed -n 's/\([0-9]*\).*/\1/p'` &&
+	  SYSTEM_NAME=`"$dummy" "$dummyarg"` &&
+	    { echo "$SYSTEM_NAME"; exit; }
+	echo mips-mips-riscos"$UNAME_RELEASE"
+	exit ;;
+    Motorola:PowerMAX_OS:*:*)
+	echo powerpc-motorola-powermax
+	exit ;;
+    Motorola:*:4.3:PL8-*)
+	echo powerpc-harris-powermax
+	exit ;;
+    Night_Hawk:*:*:PowerMAX_OS | Synergy:PowerMAX_OS:*:*)
+	echo powerpc-harris-powermax
+	exit ;;
+    Night_Hawk:Power_UNIX:*:*)
+	echo powerpc-harris-powerunix
+	exit ;;
+    m88k:CX/UX:7*:*)
+	echo m88k-harris-cxux7
+	exit ;;
+    m88k:*:4*:R4*)
+	echo m88k-motorola-sysv4
+	exit ;;
+    m88k:*:3*:R3*)
+	echo m88k-motorola-sysv3
+	exit ;;
+    AViiON:dgux:*:*)
+	# DG/UX returns AViiON for all architectures
+	UNAME_PROCESSOR=`/usr/bin/uname -p`
+	if [ "$UNAME_PROCESSOR" = mc88100 ] || [ "$UNAME_PROCESSOR" = mc88110 ]
+	then
+	    if [ "$TARGET_BINARY_INTERFACE"x = m88kdguxelfx ] || \
+	       [ "$TARGET_BINARY_INTERFACE"x = x ]
+	    then
+		echo m88k-dg-dgux"$UNAME_RELEASE"
+	    else
+		echo m88k-dg-dguxbcs"$UNAME_RELEASE"
+	    fi
+	else
+	    echo i586-dg-dgux"$UNAME_RELEASE"
+	fi
+	exit ;;
+    M88*:DolphinOS:*:*)	# DolphinOS (SVR3)
+	echo m88k-dolphin-sysv3
+	exit ;;
+    M88*:*:R3*:*)
+	# Delta 88k system running SVR3
+	echo m88k-motorola-sysv3
+	exit ;;
+    XD88*:*:*:*) # Tektronix XD88 system running UTekV (SVR3)
+	echo m88k-tektronix-sysv3
+	exit ;;
+    Tek43[0-9][0-9]:UTek:*:*) # Tektronix 4300 system running UTek (BSD)
+	echo m68k-tektronix-bsd
+	exit ;;
+    *:IRIX*:*:*)
+	echo mips-sgi-irix"`echo "$UNAME_RELEASE"|sed -e 's/-/_/g'`"
+	exit ;;
+    ????????:AIX?:[12].1:2)   # AIX 2.2.1 or AIX 2.1.1 is RT/PC AIX.
+	echo romp-ibm-aix     # uname -m gives an 8 hex-code CPU id
+	exit ;;               # Note that: echo "'`uname -s`'" gives 'AIX '
+    i*86:AIX:*:*)
+	echo i386-ibm-aix
+	exit ;;
+    ia64:AIX:*:*)
+	if [ -x /usr/bin/oslevel ] ; then
+		IBM_REV=`/usr/bin/oslevel`
+	else
+		IBM_REV="$UNAME_VERSION.$UNAME_RELEASE"
+	fi
+	echo "$UNAME_MACHINE"-ibm-aix"$IBM_REV"
+	exit ;;
+    *:AIX:2:3)
+	if grep bos325 /usr/include/stdio.h >/dev/null 2>&1; then
+		eval "$set_cc_for_build"
+		sed 's/^		//' << EOF > "$dummy.c"
+		#include <sys/systemcfg.h>
+
+		main()
+			{
+			if (!__power_pc())
+				exit(1);
+			puts("powerpc-ibm-aix3.2.5");
+			exit(0);
+			}
+EOF
+		if $CC_FOR_BUILD -o "$dummy" "$dummy.c" && SYSTEM_NAME=`"$dummy"`
+		then
+			echo "$SYSTEM_NAME"
+		else
+			echo rs6000-ibm-aix3.2.5
+		fi
+	elif grep bos324 /usr/include/stdio.h >/dev/null 2>&1; then
+		echo rs6000-ibm-aix3.2.4
+	else
+		echo rs6000-ibm-aix3.2
+	fi
+	exit ;;
+    *:AIX:*:[4567])
+	IBM_CPU_ID=`/usr/sbin/lsdev -C -c processor -S available | sed 1q | awk '{ print $1 }'`
+	if /usr/sbin/lsattr -El "$IBM_CPU_ID" | grep ' POWER' >/dev/null 2>&1; then
+		IBM_ARCH=rs6000
+	else
+		IBM_ARCH=powerpc
+	fi
+	if [ -x /usr/bin/lslpp ] ; then
+		IBM_REV=`/usr/bin/lslpp -Lqc bos.rte.libc |
+			   awk -F: '{ print $3 }' | sed s/[0-9]*$/0/`
+	else
+		IBM_REV="$UNAME_VERSION.$UNAME_RELEASE"
+	fi
+	echo "$IBM_ARCH"-ibm-aix"$IBM_REV"
+	exit ;;
+    *:AIX:*:*)
+	echo rs6000-ibm-aix
+	exit ;;
+    ibmrt:4.4BSD:*|romp-ibm:4.4BSD:*)
+	echo romp-ibm-bsd4.4
+	exit ;;
+    ibmrt:*BSD:*|romp-ibm:BSD:*)            # covers RT/PC BSD and
+	echo romp-ibm-bsd"$UNAME_RELEASE"   # 4.3 with uname added to
+	exit ;;                             # report: romp-ibm BSD 4.3
+    *:BOSX:*:*)
+	echo rs6000-bull-bosx
+	exit ;;
+    DPX/2?00:B.O.S.:*:*)
+	echo m68k-bull-sysv3
+	exit ;;
+    9000/[34]??:4.3bsd:1.*:*)
+	echo m68k-hp-bsd
+	exit ;;
+    hp300:4.4BSD:*:* | 9000/[34]??:4.3bsd:2.*:*)
+	echo m68k-hp-bsd4.4
+	exit ;;
+    9000/[34678]??:HP-UX:*:*)
+	HPUX_REV=`echo "$UNAME_RELEASE"|sed -e 's/[^.]*.[0B]*//'`
+	case "$UNAME_MACHINE" in
+	    9000/31?)            HP_ARCH=m68000 ;;
+	    9000/[34]??)         HP_ARCH=m68k ;;
+	    9000/[678][0-9][0-9])
+		if [ -x /usr/bin/getconf ]; then
+		    sc_cpu_version=`/usr/bin/getconf SC_CPU_VERSION 2>/dev/null`
+		    sc_kernel_bits=`/usr/bin/getconf SC_KERNEL_BITS 2>/dev/null`
+		    case "$sc_cpu_version" in
+		      523) HP_ARCH=hppa1.0 ;; # CPU_PA_RISC1_0
+		      528) HP_ARCH=hppa1.1 ;; # CPU_PA_RISC1_1
+		      532)                      # CPU_PA_RISC2_0
+			case "$sc_kernel_bits" in
+			  32) HP_ARCH=hppa2.0n ;;
+			  64) HP_ARCH=hppa2.0w ;;
+			  '') HP_ARCH=hppa2.0 ;;   # HP-UX 10.20
+			esac ;;
+		    esac
+		fi
+		if [ "$HP_ARCH" = "" ]; then
+		    eval "$set_cc_for_build"
+		    sed 's/^		//' << EOF > "$dummy.c"
+
+		#define _HPUX_SOURCE
+		#include <stdlib.h>
+		#include <unistd.h>
+
+		int main ()
+		{
+		#if defined(_SC_KERNEL_BITS)
+		    long bits = sysconf(_SC_KERNEL_BITS);
+		#endif
+		    long cpu  = sysconf (_SC_CPU_VERSION);
+
+		    switch (cpu)
+			{
+			case CPU_PA_RISC1_0: puts ("hppa1.0"); break;
+			case CPU_PA_RISC1_1: puts ("hppa1.1"); break;
+			case CPU_PA_RISC2_0:
+		#if defined(_SC_KERNEL_BITS)
+			    switch (bits)
+				{
+				case 64: puts ("hppa2.0w"); break;
+				case 32: puts ("hppa2.0n"); break;
+				default: puts ("hppa2.0"); break;
+				} break;
+		#else  /* !defined(_SC_KERNEL_BITS) */
+			    puts ("hppa2.0"); break;
+		#endif
+			default: puts ("hppa1.0"); break;
+			}
+		    exit (0);
+		}
+EOF
+		    (CCOPTS="" $CC_FOR_BUILD -o "$dummy" "$dummy.c" 2>/dev/null) && HP_ARCH=`"$dummy"`
+		    test -z "$HP_ARCH" && HP_ARCH=hppa
+		fi ;;
+	esac
+	if [ "$HP_ARCH" = hppa2.0w ]
+	then
+	    eval "$set_cc_for_build"
+
+	    # hppa2.0w-hp-hpux* has a 64-bit kernel and a compiler generating
+	    # 32-bit code.  hppa64-hp-hpux* has the same kernel and a compiler
+	    # generating 64-bit code.  GNU and HP use different nomenclature:
+	    #
+	    # $ CC_FOR_BUILD=cc ./config.guess
+	    # => hppa2.0w-hp-hpux11.23
+	    # $ CC_FOR_BUILD="cc +DA2.0w" ./config.guess
+	    # => hppa64-hp-hpux11.23
+
+	    if echo __LP64__ | (CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) |
+		grep -q __LP64__
+	    then
+		HP_ARCH=hppa2.0w
+	    else
+		HP_ARCH=hppa64
+	    fi
+	fi
+	echo "$HP_ARCH"-hp-hpux"$HPUX_REV"
+	exit ;;
+    ia64:HP-UX:*:*)
+	HPUX_REV=`echo "$UNAME_RELEASE"|sed -e 's/[^.]*.[0B]*//'`
+	echo ia64-hp-hpux"$HPUX_REV"
+	exit ;;
+    3050*:HI-UX:*:*)
+	eval "$set_cc_for_build"
+	sed 's/^	//' << EOF > "$dummy.c"
+	#include <unistd.h>
+	int
+	main ()
+	{
+	  long cpu = sysconf (_SC_CPU_VERSION);
+	  /* The order matters, because CPU_IS_HP_MC68K erroneously returns
+	     true for CPU_PA_RISC1_0.  CPU_IS_PA_RISC returns correct
+	     results, however.  */
+	  if (CPU_IS_PA_RISC (cpu))
+	    {
+	      switch (cpu)
+		{
+		  case CPU_PA_RISC1_0: puts ("hppa1.0-hitachi-hiuxwe2"); break;
+		  case CPU_PA_RISC1_1: puts ("hppa1.1-hitachi-hiuxwe2"); break;
+		  case CPU_PA_RISC2_0: puts ("hppa2.0-hitachi-hiuxwe2"); break;
+		  default: puts ("hppa-hitachi-hiuxwe2"); break;
+		}
+	    }
+	  else if (CPU_IS_HP_MC68K (cpu))
+	    puts ("m68k-hitachi-hiuxwe2");
+	  else puts ("unknown-hitachi-hiuxwe2");
+	  exit (0);
+	}
+EOF
+	$CC_FOR_BUILD -o "$dummy" "$dummy.c" && SYSTEM_NAME=`"$dummy"` &&
+		{ echo "$SYSTEM_NAME"; exit; }
+	echo unknown-hitachi-hiuxwe2
+	exit ;;
+    9000/7??:4.3bsd:*:* | 9000/8?[79]:4.3bsd:*:*)
+	echo hppa1.1-hp-bsd
+	exit ;;
+    9000/8??:4.3bsd:*:*)
+	echo hppa1.0-hp-bsd
+	exit ;;
+    *9??*:MPE/iX:*:* | *3000*:MPE/iX:*:*)
+	echo hppa1.0-hp-mpeix
+	exit ;;
+    hp7??:OSF1:*:* | hp8?[79]:OSF1:*:*)
+	echo hppa1.1-hp-osf
+	exit ;;
+    hp8??:OSF1:*:*)
+	echo hppa1.0-hp-osf
+	exit ;;
+    i*86:OSF1:*:*)
+	if [ -x /usr/sbin/sysversion ] ; then
+	    echo "$UNAME_MACHINE"-unknown-osf1mk
+	else
+	    echo "$UNAME_MACHINE"-unknown-osf1
+	fi
+	exit ;;
+    parisc*:Lites*:*:*)
+	echo hppa1.1-hp-lites
+	exit ;;
+    C1*:ConvexOS:*:* | convex:ConvexOS:C1*:*)
+	echo c1-convex-bsd
+	exit ;;
+    C2*:ConvexOS:*:* | convex:ConvexOS:C2*:*)
+	if getsysinfo -f scalar_acc
+	then echo c32-convex-bsd
+	else echo c2-convex-bsd
+	fi
+	exit ;;
+    C34*:ConvexOS:*:* | convex:ConvexOS:C34*:*)
+	echo c34-convex-bsd
+	exit ;;
+    C38*:ConvexOS:*:* | convex:ConvexOS:C38*:*)
+	echo c38-convex-bsd
+	exit ;;
+    C4*:ConvexOS:*:* | convex:ConvexOS:C4*:*)
+	echo c4-convex-bsd
+	exit ;;
+    CRAY*Y-MP:*:*:*)
+	echo ymp-cray-unicos"$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/'
+	exit ;;
+    CRAY*[A-Z]90:*:*:*)
+	echo "$UNAME_MACHINE"-cray-unicos"$UNAME_RELEASE" \
+	| sed -e 's/CRAY.*\([A-Z]90\)/\1/' \
+	      -e y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/ \
+	      -e 's/\.[^.]*$/.X/'
+	exit ;;
+    CRAY*TS:*:*:*)
+	echo t90-cray-unicos"$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/'
+	exit ;;
+    CRAY*T3E:*:*:*)
+	echo alphaev5-cray-unicosmk"$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/'
+	exit ;;
+    CRAY*SV1:*:*:*)
+	echo sv1-cray-unicos"$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/'
+	exit ;;
+    *:UNICOS/mp:*:*)
+	echo craynv-cray-unicosmp"$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/'
+	exit ;;
+    F30[01]:UNIX_System_V:*:* | F700:UNIX_System_V:*:*)
+	FUJITSU_PROC=`uname -m | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz`
+	FUJITSU_SYS=`uname -p | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz | sed -e 's/\///'`
+	FUJITSU_REL=`echo "$UNAME_RELEASE" | sed -e 's/ /_/'`
+	echo "${FUJITSU_PROC}-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}"
+	exit ;;
+    5000:UNIX_System_V:4.*:*)
+	FUJITSU_SYS=`uname -p | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz | sed -e 's/\///'`
+	FUJITSU_REL=`echo "$UNAME_RELEASE" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz | sed -e 's/ /_/'`
+	echo "sparc-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}"
+	exit ;;
+    i*86:BSD/386:*:* | i*86:BSD/OS:*:* | *:Ascend\ Embedded/OS:*:*)
+	echo "$UNAME_MACHINE"-pc-bsdi"$UNAME_RELEASE"
+	exit ;;
+    sparc*:BSD/OS:*:*)
+	echo sparc-unknown-bsdi"$UNAME_RELEASE"
+	exit ;;
+    *:BSD/OS:*:*)
+	echo "$UNAME_MACHINE"-unknown-bsdi"$UNAME_RELEASE"
+	exit ;;
+    *:FreeBSD:*:*)
+	UNAME_PROCESSOR=`/usr/bin/uname -p`
+	case "$UNAME_PROCESSOR" in
+	    amd64)
+		UNAME_PROCESSOR=x86_64 ;;
+	    i386)
+		UNAME_PROCESSOR=i586 ;;
+	esac
+	echo "$UNAME_PROCESSOR"-unknown-freebsd"`echo "$UNAME_RELEASE"|sed -e 's/[-(].*//'`"
+	exit ;;
+    i*:CYGWIN*:*)
+	echo "$UNAME_MACHINE"-pc-cygwin
+	exit ;;
+    *:MINGW64*:*)
+	echo "$UNAME_MACHINE"-pc-mingw64
+	exit ;;
+    *:MINGW*:*)
+	echo "$UNAME_MACHINE"-pc-mingw32
+	exit ;;
+    *:MSYS*:*)
+	echo "$UNAME_MACHINE"-pc-msys
+	exit ;;
+    i*:PW*:*)
+	echo "$UNAME_MACHINE"-pc-pw32
+	exit ;;
+    *:Interix*:*)
+	case "$UNAME_MACHINE" in
+	    x86)
+		echo i586-pc-interix"$UNAME_RELEASE"
+		exit ;;
+	    authenticamd | genuineintel | EM64T)
+		echo x86_64-unknown-interix"$UNAME_RELEASE"
+		exit ;;
+	    IA64)
+		echo ia64-unknown-interix"$UNAME_RELEASE"
+		exit ;;
+	esac ;;
+    i*:UWIN*:*)
+	echo "$UNAME_MACHINE"-pc-uwin
+	exit ;;
+    amd64:CYGWIN*:*:* | x86_64:CYGWIN*:*:*)
+	echo x86_64-unknown-cygwin
+	exit ;;
+    prep*:SunOS:5.*:*)
+	echo powerpcle-unknown-solaris2"`echo "$UNAME_RELEASE"|sed -e 's/[^.]*//'`"
+	exit ;;
+    *:GNU:*:*)
+	# the GNU system
+	echo "`echo "$UNAME_MACHINE"|sed -e 's,[-/].*$,,'`-unknown-$LIBC`echo "$UNAME_RELEASE"|sed -e 's,/.*$,,'`"
+	exit ;;
+    *:GNU/*:*:*)
+	# other systems with GNU libc and userland
+	echo "$UNAME_MACHINE-unknown-`echo "$UNAME_SYSTEM" | sed 's,^[^/]*/,,' | tr "[:upper:]" "[:lower:]"``echo "$UNAME_RELEASE"|sed -e 's/[-(].*//'`-$LIBC"
+	exit ;;
+    i*86:Minix:*:*)
+	echo "$UNAME_MACHINE"-pc-minix
+	exit ;;
+    aarch64:Linux:*:*)
+	echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"
+	exit ;;
+    aarch64_be:Linux:*:*)
+	UNAME_MACHINE=aarch64_be
+	echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"
+	exit ;;
+    alpha:Linux:*:*)
+	case `sed -n '/^cpu model/s/^.*: \(.*\)/\1/p' < /proc/cpuinfo` in
+	  EV5)   UNAME_MACHINE=alphaev5 ;;
+	  EV56)  UNAME_MACHINE=alphaev56 ;;
+	  PCA56) UNAME_MACHINE=alphapca56 ;;
+	  PCA57) UNAME_MACHINE=alphapca56 ;;
+	  EV6)   UNAME_MACHINE=alphaev6 ;;
+	  EV67)  UNAME_MACHINE=alphaev67 ;;
+	  EV68*) UNAME_MACHINE=alphaev68 ;;
+	esac
+	objdump --private-headers /bin/sh | grep -q ld.so.1
+	if test "$?" = 0 ; then LIBC=gnulibc1 ; fi
+	echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"
+	exit ;;
+    arc:Linux:*:* | arceb:Linux:*:*)
+	echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"
+	exit ;;
+    arm*:Linux:*:*)
+	eval "$set_cc_for_build"
+	if echo __ARM_EABI__ | $CC_FOR_BUILD -E - 2>/dev/null \
+	    | grep -q __ARM_EABI__
+	then
+	    echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"
+	else
+	    if echo __ARM_PCS_VFP | $CC_FOR_BUILD -E - 2>/dev/null \
+		| grep -q __ARM_PCS_VFP
+	    then
+		echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"eabi
+	    else
+		echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"eabihf
+	    fi
+	fi
+	exit ;;
+    avr32*:Linux:*:*)
+	echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"
+	exit ;;
+    cris:Linux:*:*)
+	echo "$UNAME_MACHINE"-axis-linux-"$LIBC"
+	exit ;;
+    crisv32:Linux:*:*)
+	echo "$UNAME_MACHINE"-axis-linux-"$LIBC"
+	exit ;;
+    e2k:Linux:*:*)
+	echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"
+	exit ;;
+    frv:Linux:*:*)
+	echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"
+	exit ;;
+    hexagon:Linux:*:*)
+	echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"
+	exit ;;
+    i*86:Linux:*:*)
+	echo "$UNAME_MACHINE"-pc-linux-"$LIBC"
+	exit ;;
+    ia64:Linux:*:*)
+	echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"
+	exit ;;
+    k1om:Linux:*:*)
+	echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"
+	exit ;;
+    m32r*:Linux:*:*)
+	echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"
+	exit ;;
+    m68*:Linux:*:*)
+	echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"
+	exit ;;
+    mips:Linux:*:* | mips64:Linux:*:*)
+	eval "$set_cc_for_build"
+	sed 's/^	//' << EOF > "$dummy.c"
+	#undef CPU
+	#undef ${UNAME_MACHINE}
+	#undef ${UNAME_MACHINE}el
+	#if defined(__MIPSEL__) || defined(__MIPSEL) || defined(_MIPSEL) || defined(MIPSEL)
+	CPU=${UNAME_MACHINE}el
+	#else
+	#if defined(__MIPSEB__) || defined(__MIPSEB) || defined(_MIPSEB) || defined(MIPSEB)
+	CPU=${UNAME_MACHINE}
+	#else
+	CPU=
+	#endif
+	#endif
+EOF
+	eval "`$CC_FOR_BUILD -E "$dummy.c" 2>/dev/null | grep '^CPU'`"
+	test "x$CPU" != x && { echo "$CPU-unknown-linux-$LIBC"; exit; }
+	;;
+    mips64el:Linux:*:*)
+	echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"
+	exit ;;
+    openrisc*:Linux:*:*)
+	echo or1k-unknown-linux-"$LIBC"
+	exit ;;
+    or32:Linux:*:* | or1k*:Linux:*:*)
+	echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"
+	exit ;;
+    padre:Linux:*:*)
+	echo sparc-unknown-linux-"$LIBC"
+	exit ;;
+    parisc64:Linux:*:* | hppa64:Linux:*:*)
+	echo hppa64-unknown-linux-"$LIBC"
+	exit ;;
+    parisc:Linux:*:* | hppa:Linux:*:*)
+	# Look for CPU level
+	case `grep '^cpu[^a-z]*:' /proc/cpuinfo 2>/dev/null | cut -d' ' -f2` in
+	  PA7*) echo hppa1.1-unknown-linux-"$LIBC" ;;
+	  PA8*) echo hppa2.0-unknown-linux-"$LIBC" ;;
+	  *)    echo hppa-unknown-linux-"$LIBC" ;;
+	esac
+	exit ;;
+    ppc64:Linux:*:*)
+	echo powerpc64-unknown-linux-"$LIBC"
+	exit ;;
+    ppc:Linux:*:*)
+	echo powerpc-unknown-linux-"$LIBC"
+	exit ;;
+    ppc64le:Linux:*:*)
+	echo powerpc64le-unknown-linux-"$LIBC"
+	exit ;;
+    ppcle:Linux:*:*)
+	echo powerpcle-unknown-linux-"$LIBC"
+	exit ;;
+    riscv32:Linux:*:* | riscv64:Linux:*:*)
+	echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"
+	exit ;;
+    s390:Linux:*:* | s390x:Linux:*:*)
+	echo "$UNAME_MACHINE"-ibm-linux-"$LIBC"
+	exit ;;
+    sh64*:Linux:*:*)
+	echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"
+	exit ;;
+    sh*:Linux:*:*)
+	echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"
+	exit ;;
+    sparc:Linux:*:* | sparc64:Linux:*:*)
+	echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"
+	exit ;;
+    tile*:Linux:*:*)
+	echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"
+	exit ;;
+    vax:Linux:*:*)
+	echo "$UNAME_MACHINE"-dec-linux-"$LIBC"
+	exit ;;
+    x86_64:Linux:*:*)
+	if objdump -f /bin/sh | grep -q elf32-x86-64; then
+	    echo "$UNAME_MACHINE"-pc-linux-"$LIBC"x32
+	else
+	    echo "$UNAME_MACHINE"-pc-linux-"$LIBC"
+	fi
+	exit ;;
+    xtensa*:Linux:*:*)
+	echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"
+	exit ;;
+    i*86:DYNIX/ptx:4*:*)
+	# ptx 4.0 does uname -s correctly, with DYNIX/ptx in there.
+	# earlier versions are messed up and put the nodename in both
+	# sysname and nodename.
+	echo i386-sequent-sysv4
+	exit ;;
+    i*86:UNIX_SV:4.2MP:2.*)
+	# Unixware is an offshoot of SVR4, but it has its own version
+	# number series starting with 2...
+	# I am not positive that other SVR4 systems won't match this,
+	# I just have to hope.  -- rms.
+	# Use sysv4.2uw... so that sysv4* matches it.
+	echo "$UNAME_MACHINE"-pc-sysv4.2uw"$UNAME_VERSION"
+	exit ;;
+    i*86:OS/2:*:*)
+	# If we were able to find `uname', then EMX Unix compatibility
+	# is probably installed.
+	echo "$UNAME_MACHINE"-pc-os2-emx
+	exit ;;
+    i*86:XTS-300:*:STOP)
+	echo "$UNAME_MACHINE"-unknown-stop
+	exit ;;
+    i*86:atheos:*:*)
+	echo "$UNAME_MACHINE"-unknown-atheos
+	exit ;;
+    i*86:syllable:*:*)
+	echo "$UNAME_MACHINE"-pc-syllable
+	exit ;;
+    i*86:LynxOS:2.*:* | i*86:LynxOS:3.[01]*:* | i*86:LynxOS:4.[02]*:*)
+	echo i386-unknown-lynxos"$UNAME_RELEASE"
+	exit ;;
+    i*86:*DOS:*:*)
+	echo "$UNAME_MACHINE"-pc-msdosdjgpp
+	exit ;;
+    i*86:*:4.*:*)
+	UNAME_REL=`echo "$UNAME_RELEASE" | sed 's/\/MP$//'`
+	if grep Novell /usr/include/link.h >/dev/null 2>/dev/null; then
+		echo "$UNAME_MACHINE"-univel-sysv"$UNAME_REL"
+	else
+		echo "$UNAME_MACHINE"-pc-sysv"$UNAME_REL"
+	fi
+	exit ;;
+    i*86:*:5:[678]*)
+	# UnixWare 7.x, OpenUNIX and OpenServer 6.
+	case `/bin/uname -X | grep "^Machine"` in
+	    *486*)	     UNAME_MACHINE=i486 ;;
+	    *Pentium)	     UNAME_MACHINE=i586 ;;
+	    *Pent*|*Celeron) UNAME_MACHINE=i686 ;;
+	esac
+	echo "$UNAME_MACHINE-unknown-sysv${UNAME_RELEASE}${UNAME_SYSTEM}{$UNAME_VERSION}"
+	exit ;;
+    i*86:*:3.2:*)
+	if test -f /usr/options/cb.name; then
+		UNAME_REL=`sed -n 's/.*Version //p' </usr/options/cb.name`
+		echo "$UNAME_MACHINE"-pc-isc"$UNAME_REL"
+	elif /bin/uname -X 2>/dev/null >/dev/null ; then
+		UNAME_REL=`(/bin/uname -X|grep Release|sed -e 's/.*= //')`
+		(/bin/uname -X|grep i80486 >/dev/null) && UNAME_MACHINE=i486
+		(/bin/uname -X|grep '^Machine.*Pentium' >/dev/null) \
+			&& UNAME_MACHINE=i586
+		(/bin/uname -X|grep '^Machine.*Pent *II' >/dev/null) \
+			&& UNAME_MACHINE=i686
+		(/bin/uname -X|grep '^Machine.*Pentium Pro' >/dev/null) \
+			&& UNAME_MACHINE=i686
+		echo "$UNAME_MACHINE"-pc-sco"$UNAME_REL"
+	else
+		echo "$UNAME_MACHINE"-pc-sysv32
+	fi
+	exit ;;
+    pc:*:*:*)
+	# Left here for compatibility:
+	# uname -m prints for DJGPP always 'pc', but it prints nothing about
+	# the processor, so we play safe by assuming i586.
+	# Note: whatever this is, it MUST be the same as what config.sub
+	# prints for the "djgpp" host, or else GDB configure will decide that
+	# this is a cross-build.
+	echo i586-pc-msdosdjgpp
+	exit ;;
+    Intel:Mach:3*:*)
+	echo i386-pc-mach3
+	exit ;;
+    paragon:*:*:*)
+	echo i860-intel-osf1
+	exit ;;
+    i860:*:4.*:*) # i860-SVR4
+	if grep Stardent /usr/include/sys/uadmin.h >/dev/null 2>&1 ; then
+	  echo i860-stardent-sysv"$UNAME_RELEASE" # Stardent Vistra i860-SVR4
+	else # Add other i860-SVR4 vendors below as they are discovered.
+	  echo i860-unknown-sysv"$UNAME_RELEASE"  # Unknown i860-SVR4
+	fi
+	exit ;;
+    mini*:CTIX:SYS*5:*)
+	# "miniframe"
+	echo m68010-convergent-sysv
+	exit ;;
+    mc68k:UNIX:SYSTEM5:3.51m)
+	echo m68k-convergent-sysv
+	exit ;;
+    M680?0:D-NIX:5.3:*)
+	echo m68k-diab-dnix
+	exit ;;
+    M68*:*:R3V[5678]*:*)
+	test -r /sysV68 && { echo 'm68k-motorola-sysv'; exit; } ;;
+    3[345]??:*:4.0:3.0 | 3[34]??A:*:4.0:3.0 | 3[34]??,*:*:4.0:3.0 | 3[34]??/*:*:4.0:3.0 | 4400:*:4.0:3.0 | 4850:*:4.0:3.0 | SKA40:*:4.0:3.0 | SDS2:*:4.0:3.0 | SHG2:*:4.0:3.0 | S7501*:*:4.0:3.0)
+	OS_REL=''
+	test -r /etc/.relid \
+	&& OS_REL=.`sed -n 's/[^ ]* [^ ]* \([0-9][0-9]\).*/\1/p' < /etc/.relid`
+	/bin/uname -p 2>/dev/null | grep 86 >/dev/null \
+	  && { echo i486-ncr-sysv4.3"$OS_REL"; exit; }
+	/bin/uname -p 2>/dev/null | /bin/grep entium >/dev/null \
+	  && { echo i586-ncr-sysv4.3"$OS_REL"; exit; } ;;
+    3[34]??:*:4.0:* | 3[34]??,*:*:4.0:*)
+	/bin/uname -p 2>/dev/null | grep 86 >/dev/null \
+	  && { echo i486-ncr-sysv4; exit; } ;;
+    NCR*:*:4.2:* | MPRAS*:*:4.2:*)
+	OS_REL='.3'
+	test -r /etc/.relid \
+	    && OS_REL=.`sed -n 's/[^ ]* [^ ]* \([0-9][0-9]\).*/\1/p' < /etc/.relid`
+	/bin/uname -p 2>/dev/null | grep 86 >/dev/null \
+	    && { echo i486-ncr-sysv4.3"$OS_REL"; exit; }
+	/bin/uname -p 2>/dev/null | /bin/grep entium >/dev/null \
+	    && { echo i586-ncr-sysv4.3"$OS_REL"; exit; }
+	/bin/uname -p 2>/dev/null | /bin/grep pteron >/dev/null \
+	    && { echo i586-ncr-sysv4.3"$OS_REL"; exit; } ;;
+    m68*:LynxOS:2.*:* | m68*:LynxOS:3.0*:*)
+	echo m68k-unknown-lynxos"$UNAME_RELEASE"
+	exit ;;
+    mc68030:UNIX_System_V:4.*:*)
+	echo m68k-atari-sysv4
+	exit ;;
+    TSUNAMI:LynxOS:2.*:*)
+	echo sparc-unknown-lynxos"$UNAME_RELEASE"
+	exit ;;
+    rs6000:LynxOS:2.*:*)
+	echo rs6000-unknown-lynxos"$UNAME_RELEASE"
+	exit ;;
+    PowerPC:LynxOS:2.*:* | PowerPC:LynxOS:3.[01]*:* | PowerPC:LynxOS:4.[02]*:*)
+	echo powerpc-unknown-lynxos"$UNAME_RELEASE"
+	exit ;;
+    SM[BE]S:UNIX_SV:*:*)
+	echo mips-dde-sysv"$UNAME_RELEASE"
+	exit ;;
+    RM*:ReliantUNIX-*:*:*)
+	echo mips-sni-sysv4
+	exit ;;
+    RM*:SINIX-*:*:*)
+	echo mips-sni-sysv4
+	exit ;;
+    *:SINIX-*:*:*)
+	if uname -p 2>/dev/null >/dev/null ; then
+		UNAME_MACHINE=`(uname -p) 2>/dev/null`
+		echo "$UNAME_MACHINE"-sni-sysv4
+	else
+		echo ns32k-sni-sysv
+	fi
+	exit ;;
+    PENTIUM:*:4.0*:*)	# Unisys `ClearPath HMP IX 4000' SVR4/MP effort
+			# says <Richard.M.Bartel@ccMail.Census.GOV>
+	echo i586-unisys-sysv4
+	exit ;;
+    *:UNIX_System_V:4*:FTX*)
+	# From Gerald Hewes <hewes@openmarket.com>.
+	# How about differentiating between stratus architectures? -djm
+	echo hppa1.1-stratus-sysv4
+	exit ;;
+    *:*:*:FTX*)
+	# From seanf@swdc.stratus.com.
+	echo i860-stratus-sysv4
+	exit ;;
+    i*86:VOS:*:*)
+	# From Paul.Green@stratus.com.
+	echo "$UNAME_MACHINE"-stratus-vos
+	exit ;;
+    *:VOS:*:*)
+	# From Paul.Green@stratus.com.
+	echo hppa1.1-stratus-vos
+	exit ;;
+    mc68*:A/UX:*:*)
+	echo m68k-apple-aux"$UNAME_RELEASE"
+	exit ;;
+    news*:NEWS-OS:6*:*)
+	echo mips-sony-newsos6
+	exit ;;
+    R[34]000:*System_V*:*:* | R4000:UNIX_SYSV:*:* | R*000:UNIX_SV:*:*)
+	if [ -d /usr/nec ]; then
+		echo mips-nec-sysv"$UNAME_RELEASE"
+	else
+		echo mips-unknown-sysv"$UNAME_RELEASE"
+	fi
+	exit ;;
+    BeBox:BeOS:*:*)	# BeOS running on hardware made by Be, PPC only.
+	echo powerpc-be-beos
+	exit ;;
+    BeMac:BeOS:*:*)	# BeOS running on Mac or Mac clone, PPC only.
+	echo powerpc-apple-beos
+	exit ;;
+    BePC:BeOS:*:*)	# BeOS running on Intel PC compatible.
+	echo i586-pc-beos
+	exit ;;
+    BePC:Haiku:*:*)	# Haiku running on Intel PC compatible.
+	echo i586-pc-haiku
+	exit ;;
+    x86_64:Haiku:*:*)
+	echo x86_64-unknown-haiku
+	exit ;;
+    SX-4:SUPER-UX:*:*)
+	echo sx4-nec-superux"$UNAME_RELEASE"
+	exit ;;
+    SX-5:SUPER-UX:*:*)
+	echo sx5-nec-superux"$UNAME_RELEASE"
+	exit ;;
+    SX-6:SUPER-UX:*:*)
+	echo sx6-nec-superux"$UNAME_RELEASE"
+	exit ;;
+    SX-7:SUPER-UX:*:*)
+	echo sx7-nec-superux"$UNAME_RELEASE"
+	exit ;;
+    SX-8:SUPER-UX:*:*)
+	echo sx8-nec-superux"$UNAME_RELEASE"
+	exit ;;
+    SX-8R:SUPER-UX:*:*)
+	echo sx8r-nec-superux"$UNAME_RELEASE"
+	exit ;;
+    SX-ACE:SUPER-UX:*:*)
+	echo sxace-nec-superux"$UNAME_RELEASE"
+	exit ;;
+    Power*:Rhapsody:*:*)
+	echo powerpc-apple-rhapsody"$UNAME_RELEASE"
+	exit ;;
+    *:Rhapsody:*:*)
+	echo "$UNAME_MACHINE"-apple-rhapsody"$UNAME_RELEASE"
+	exit ;;
+    *:Darwin:*:*)
+	UNAME_PROCESSOR=`uname -p` || UNAME_PROCESSOR=unknown
+	eval "$set_cc_for_build"
+	if test "$UNAME_PROCESSOR" = unknown ; then
+	    UNAME_PROCESSOR=powerpc
+	fi
+	if test "`echo "$UNAME_RELEASE" | sed -e 's/\..*//'`" -le 10 ; then
+	    if [ "$CC_FOR_BUILD" != no_compiler_found ]; then
+		if (echo '#ifdef __LP64__'; echo IS_64BIT_ARCH; echo '#endif') | \
+		       (CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | \
+		       grep IS_64BIT_ARCH >/dev/null
+		then
+		    case $UNAME_PROCESSOR in
+			i386) UNAME_PROCESSOR=x86_64 ;;
+			powerpc) UNAME_PROCESSOR=powerpc64 ;;
+		    esac
+		fi
+		# On 10.4-10.6 one might compile for PowerPC via gcc -arch ppc
+		if (echo '#ifdef __POWERPC__'; echo IS_PPC; echo '#endif') | \
+		       (CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | \
+		       grep IS_PPC >/dev/null
+		then
+		    UNAME_PROCESSOR=powerpc
+		fi
+	    fi
+	elif test "$UNAME_PROCESSOR" = i386 ; then
+	    # Avoid executing cc on OS X 10.9, as it ships with a stub
+	    # that puts up a graphical alert prompting to install
+	    # developer tools.  Any system running Mac OS X 10.7 or
+	    # later (Darwin 11 and later) is required to have a 64-bit
+	    # processor. This is not true of the ARM version of Darwin
+	    # that Apple uses in portable devices.
+	    UNAME_PROCESSOR=x86_64
+	fi
+	echo "$UNAME_PROCESSOR"-apple-darwin"$UNAME_RELEASE"
+	exit ;;
+    *:procnto*:*:* | *:QNX:[0123456789]*:*)
+	UNAME_PROCESSOR=`uname -p`
+	if test "$UNAME_PROCESSOR" = x86; then
+		UNAME_PROCESSOR=i386
+		UNAME_MACHINE=pc
+	fi
+	echo "$UNAME_PROCESSOR"-"$UNAME_MACHINE"-nto-qnx"$UNAME_RELEASE"
+	exit ;;
+    *:QNX:*:4*)
+	echo i386-pc-qnx
+	exit ;;
+    NEO-*:NONSTOP_KERNEL:*:*)
+	echo neo-tandem-nsk"$UNAME_RELEASE"
+	exit ;;
+    NSE-*:NONSTOP_KERNEL:*:*)
+	echo nse-tandem-nsk"$UNAME_RELEASE"
+	exit ;;
+    NSR-*:NONSTOP_KERNEL:*:*)
+	echo nsr-tandem-nsk"$UNAME_RELEASE"
+	exit ;;
+    NSV-*:NONSTOP_KERNEL:*:*)
+	echo nsv-tandem-nsk"$UNAME_RELEASE"
+	exit ;;
+    NSX-*:NONSTOP_KERNEL:*:*)
+	echo nsx-tandem-nsk"$UNAME_RELEASE"
+	exit ;;
+    *:NonStop-UX:*:*)
+	echo mips-compaq-nonstopux
+	exit ;;
+    BS2000:POSIX*:*:*)
+	echo bs2000-siemens-sysv
+	exit ;;
+    DS/*:UNIX_System_V:*:*)
+	echo "$UNAME_MACHINE"-"$UNAME_SYSTEM"-"$UNAME_RELEASE"
+	exit ;;
+    *:Plan9:*:*)
+	# "uname -m" is not consistent, so use $cputype instead. 386
+	# is converted to i386 for consistency with other x86
+	# operating systems.
+	if test "$cputype" = 386; then
+	    UNAME_MACHINE=i386
+	else
+	    UNAME_MACHINE="$cputype"
+	fi
+	echo "$UNAME_MACHINE"-unknown-plan9
+	exit ;;
+    *:TOPS-10:*:*)
+	echo pdp10-unknown-tops10
+	exit ;;
+    *:TENEX:*:*)
+	echo pdp10-unknown-tenex
+	exit ;;
+    KS10:TOPS-20:*:* | KL10:TOPS-20:*:* | TYPE4:TOPS-20:*:*)
+	echo pdp10-dec-tops20
+	exit ;;
+    XKL-1:TOPS-20:*:* | TYPE5:TOPS-20:*:*)
+	echo pdp10-xkl-tops20
+	exit ;;
+    *:TOPS-20:*:*)
+	echo pdp10-unknown-tops20
+	exit ;;
+    *:ITS:*:*)
+	echo pdp10-unknown-its
+	exit ;;
+    SEI:*:*:SEIUX)
+	echo mips-sei-seiux"$UNAME_RELEASE"
+	exit ;;
+    *:DragonFly:*:*)
+	echo "$UNAME_MACHINE"-unknown-dragonfly"`echo "$UNAME_RELEASE"|sed -e 's/[-(].*//'`"
+	exit ;;
+    *:*VMS:*:*)
+	UNAME_MACHINE=`(uname -p) 2>/dev/null`
+	case "$UNAME_MACHINE" in
+	    A*) echo alpha-dec-vms ; exit ;;
+	    I*) echo ia64-dec-vms ; exit ;;
+	    V*) echo vax-dec-vms ; exit ;;
+	esac ;;
+    *:XENIX:*:SysV)
+	echo i386-pc-xenix
+	exit ;;
+    i*86:skyos:*:*)
+	echo "$UNAME_MACHINE"-pc-skyos"`echo "$UNAME_RELEASE" | sed -e 's/ .*$//'`"
+	exit ;;
+    i*86:rdos:*:*)
+	echo "$UNAME_MACHINE"-pc-rdos
+	exit ;;
+    i*86:AROS:*:*)
+	echo "$UNAME_MACHINE"-pc-aros
+	exit ;;
+    x86_64:VMkernel:*:*)
+	echo "$UNAME_MACHINE"-unknown-esx
+	exit ;;
+    amd64:Isilon\ OneFS:*:*)
+	echo x86_64-unknown-onefs
+	exit ;;
+esac
+
+echo "$0: unable to guess system type" >&2
+
+case "$UNAME_MACHINE:$UNAME_SYSTEM" in
+    mips:Linux | mips64:Linux)
+	# If we got here on MIPS GNU/Linux, output extra information.
+	cat >&2 <<EOF
+
+NOTE: MIPS GNU/Linux systems require a C compiler to fully recognize
+the system type. Please install a C compiler and try again.
+EOF
+	;;
+esac
+
+cat >&2 <<EOF
+
+This script (version $timestamp), has failed to recognize the
+operating system you are using. If your script is old, overwrite *all*
+copies of config.guess and config.sub with the latest versions from:
+
+  https://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.guess
+and
+  https://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.sub
+
+If $0 has already been updated, send the following data and any
+information you think might be pertinent to config-patches@gnu.org to
+provide the necessary information to handle your system.
+
+config.guess timestamp = $timestamp
+
+uname -m = `(uname -m) 2>/dev/null || echo unknown`
+uname -r = `(uname -r) 2>/dev/null || echo unknown`
+uname -s = `(uname -s) 2>/dev/null || echo unknown`
+uname -v = `(uname -v) 2>/dev/null || echo unknown`
+
+/usr/bin/uname -p = `(/usr/bin/uname -p) 2>/dev/null`
+/bin/uname -X     = `(/bin/uname -X) 2>/dev/null`
+
+hostinfo               = `(hostinfo) 2>/dev/null`
+/bin/universe          = `(/bin/universe) 2>/dev/null`
+/usr/bin/arch -k       = `(/usr/bin/arch -k) 2>/dev/null`
+/bin/arch              = `(/bin/arch) 2>/dev/null`
+/usr/bin/oslevel       = `(/usr/bin/oslevel) 2>/dev/null`
+/usr/convex/getsysinfo = `(/usr/convex/getsysinfo) 2>/dev/null`
+
+UNAME_MACHINE = "$UNAME_MACHINE"
+UNAME_RELEASE = "$UNAME_RELEASE"
+UNAME_SYSTEM  = "$UNAME_SYSTEM"
+UNAME_VERSION = "$UNAME_VERSION"
+EOF
+
+exit 1
+
+# Local variables:
+# eval: (add-hook 'write-file-functions 'time-stamp)
+# time-stamp-start: "timestamp='"
+# time-stamp-format: "%:y-%02m-%02d"
+# time-stamp-end: "'"
+# End:
diff --git a/src/third_party/unwind/dist/config/config.sub b/src/third_party/unwind/dist/config/config.sub
new file mode 100755
index 00000000000..1d8e98bcee2
--- /dev/null
+++ b/src/third_party/unwind/dist/config/config.sub
@@ -0,0 +1,1801 @@
+#! /bin/sh
+# Configuration validation subroutine script.
+#   Copyright 1992-2018 Free Software Foundation, Inc.
+
+timestamp='2018-02-22'
+
+# This file is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, see <https://www.gnu.org/licenses/>.
+#
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that
+# program.  This Exception is an additional permission under section 7
+# of the GNU General Public License, version 3 ("GPLv3").
+
+
+# Please send patches to <config-patches@gnu.org>.
+#
+# Configuration subroutine to validate and canonicalize a configuration type.
+# Supply the specified configuration type as an argument.
+# If it is invalid, we print an error message on stderr and exit with code 1.
+# Otherwise, we print the canonical config type on stdout and succeed.
+
+# You can get the latest version of this script from:
+# https://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.sub
+
+# This file is supposed to be the same for all GNU packages
+# and recognize all the CPU types, system types and aliases
+# that are meaningful with *any* GNU software.
+# Each package is responsible for reporting which valid configurations
+# it does not support.  The user should be able to distinguish
+# a failure to support a valid configuration from a meaningless
+# configuration.
+
+# The goal of this file is to map all the various variations of a given
+# machine specification into a single specification in the form:
+#	CPU_TYPE-MANUFACTURER-OPERATING_SYSTEM
+# or in some cases, the newer four-part form:
+#	CPU_TYPE-MANUFACTURER-KERNEL-OPERATING_SYSTEM
+# It is wrong to echo any other type of specification.
+
+me=`echo "$0" | sed -e 's,.*/,,'`
+
+usage="\
+Usage: $0 [OPTION] CPU-MFR-OPSYS or ALIAS
+
+Canonicalize a configuration name.
+
+Options:
+  -h, --help         print this help, then exit
+  -t, --time-stamp   print date of last modification, then exit
+  -v, --version      print version number, then exit
+
+Report bugs and patches to <config-patches@gnu.org>."
+
+version="\
+GNU config.sub ($timestamp)
+
+Copyright 1992-2018 Free Software Foundation, Inc.
+
+This is free software; see the source for copying conditions.  There is NO
+warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."
+
+help="
+Try \`$me --help' for more information."
+
+# Parse command line
+while test $# -gt 0 ; do
+  case $1 in
+    --time-stamp | --time* | -t )
+       echo "$timestamp" ; exit ;;
+    --version | -v )
+       echo "$version" ; exit ;;
+    --help | --h* | -h )
+       echo "$usage"; exit ;;
+    -- )     # Stop option processing
+       shift; break ;;
+    - )	# Use stdin as input.
+       break ;;
+    -* )
+       echo "$me: invalid option $1$help"
+       exit 1 ;;
+
+    *local*)
+       # First pass through any local machine types.
+       echo "$1"
+       exit ;;
+
+    * )
+       break ;;
+  esac
+done
+
+case $# in
+ 0) echo "$me: missing argument$help" >&2
+    exit 1;;
+ 1) ;;
+ *) echo "$me: too many arguments$help" >&2
+    exit 1;;
+esac
+
+# Separate what the user gave into CPU-COMPANY and OS or KERNEL-OS (if any).
+# Here we must recognize all the valid KERNEL-OS combinations.
+maybe_os=`echo "$1" | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\2/'`
+case $maybe_os in
+  nto-qnx* | linux-gnu* | linux-android* | linux-dietlibc | linux-newlib* | \
+  linux-musl* | linux-uclibc* | uclinux-uclibc* | uclinux-gnu* | kfreebsd*-gnu* | \
+  knetbsd*-gnu* | netbsd*-gnu* | netbsd*-eabi* | \
+  kopensolaris*-gnu* | cloudabi*-eabi* | \
+  storm-chaos* | os2-emx* | rtmk-nova*)
+    os=-$maybe_os
+    basic_machine=`echo "$1" | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\1/'`
+    ;;
+  android-linux)
+    os=-linux-android
+    basic_machine=`echo "$1" | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\1/'`-unknown
+    ;;
+  *)
+    basic_machine=`echo "$1" | sed 's/-[^-]*$//'`
+    if [ "$basic_machine" != "$1" ]
+    then os=`echo "$1" | sed 's/.*-/-/'`
+    else os=; fi
+    ;;
+esac
+
+### Let's recognize common machines as not being operating systems so
+### that things like config.sub decstation-3100 work.  We also
+### recognize some manufacturers as not being operating systems, so we
+### can provide default operating systems below.
+case $os in
+	-sun*os*)
+		# Prevent following clause from handling this invalid input.
+		;;
+	-dec* | -mips* | -sequent* | -encore* | -pc532* | -sgi* | -sony* | \
+	-att* | -7300* | -3300* | -delta* | -motorola* | -sun[234]* | \
+	-unicom* | -ibm* | -next | -hp | -isi* | -apollo | -altos* | \
+	-convergent* | -ncr* | -news | -32* | -3600* | -3100* | -hitachi* |\
+	-c[123]* | -convex* | -sun | -crds | -omron* | -dg | -ultra | -tti* | \
+	-harris | -dolphin | -highlevel | -gould | -cbm | -ns | -masscomp | \
+	-apple | -axis | -knuth | -cray | -microblaze*)
+		os=
+		basic_machine=$1
+		;;
+	-bluegene*)
+		os=-cnk
+		;;
+	-sim | -cisco | -oki | -wec | -winbond)
+		os=
+		basic_machine=$1
+		;;
+	-scout)
+		;;
+	-wrs)
+		os=-vxworks
+		basic_machine=$1
+		;;
+	-chorusos*)
+		os=-chorusos
+		basic_machine=$1
+		;;
+	-chorusrdb)
+		os=-chorusrdb
+		basic_machine=$1
+		;;
+	-hiux*)
+		os=-hiuxwe2
+		;;
+	-sco6)
+		os=-sco5v6
+		basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'`
+		;;
+	-sco5)
+		os=-sco3.2v5
+		basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'`
+		;;
+	-sco4)
+		os=-sco3.2v4
+		basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'`
+		;;
+	-sco3.2.[4-9]*)
+		os=`echo $os | sed -e 's/sco3.2./sco3.2v/'`
+		basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'`
+		;;
+	-sco3.2v[4-9]*)
+		# Don't forget version if it is 3.2v4 or newer.
+		basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'`
+		;;
+	-sco5v6*)
+		# Don't forget version if it is 3.2v4 or newer.
+		basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'`
+		;;
+	-sco*)
+		os=-sco3.2v2
+		basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'`
+		;;
+	-udk*)
+		basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'`
+		;;
+	-isc)
+		os=-isc2.2
+		basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'`
+		;;
+	-clix*)
+		basic_machine=clipper-intergraph
+		;;
+	-isc*)
+		basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'`
+		;;
+	-lynx*178)
+		os=-lynxos178
+		;;
+	-lynx*5)
+		os=-lynxos5
+		;;
+	-lynx*)
+		os=-lynxos
+		;;
+	-ptx*)
+		basic_machine=`echo "$1" | sed -e 's/86-.*/86-sequent/'`
+		;;
+	-psos*)
+		os=-psos
+		;;
+	-mint | -mint[0-9]*)
+		basic_machine=m68k-atari
+		os=-mint
+		;;
+esac
+
+# Decode aliases for certain CPU-COMPANY combinations.
+case $basic_machine in
+	# Recognize the basic CPU types without company name.
+	# Some are omitted here because they have special meanings below.
+	1750a | 580 \
+	| a29k \
+	| aarch64 | aarch64_be \
+	| alpha | alphaev[4-8] | alphaev56 | alphaev6[78] | alphapca5[67] \
+	| alpha64 | alpha64ev[4-8] | alpha64ev56 | alpha64ev6[78] | alpha64pca5[67] \
+	| am33_2.0 \
+	| arc | arceb \
+	| arm | arm[bl]e | arme[lb] | armv[2-8] | armv[3-8][lb] | armv7[arm] \
+	| avr | avr32 \
+	| ba \
+	| be32 | be64 \
+	| bfin \
+	| c4x | c8051 | clipper \
+	| d10v | d30v | dlx | dsp16xx \
+	| e2k | epiphany \
+	| fido | fr30 | frv | ft32 \
+	| h8300 | h8500 | hppa | hppa1.[01] | hppa2.0 | hppa2.0[nw] | hppa64 \
+	| hexagon \
+	| i370 | i860 | i960 | ia16 | ia64 \
+	| ip2k | iq2000 \
+	| k1om \
+	| le32 | le64 \
+	| lm32 \
+	| m32c | m32r | m32rle | m68000 | m68k | m88k \
+	| maxq | mb | microblaze | microblazeel | mcore | mep | metag \
+	| mips | mipsbe | mipseb | mipsel | mipsle \
+	| mips16 \
+	| mips64 | mips64el \
+	| mips64octeon | mips64octeonel \
+	| mips64orion | mips64orionel \
+	| mips64r5900 | mips64r5900el \
+	| mips64vr | mips64vrel \
+	| mips64vr4100 | mips64vr4100el \
+	| mips64vr4300 | mips64vr4300el \
+	| mips64vr5000 | mips64vr5000el \
+	| mips64vr5900 | mips64vr5900el \
+	| mipsisa32 | mipsisa32el \
+	| mipsisa32r2 | mipsisa32r2el \
+	| mipsisa32r6 | mipsisa32r6el \
+	| mipsisa64 | mipsisa64el \
+	| mipsisa64r2 | mipsisa64r2el \
+	| mipsisa64r6 | mipsisa64r6el \
+	| mipsisa64sb1 | mipsisa64sb1el \
+	| mipsisa64sr71k | mipsisa64sr71kel \
+	| mipsr5900 | mipsr5900el \
+	| mipstx39 | mipstx39el \
+	| mn10200 | mn10300 \
+	| moxie \
+	| mt \
+	| msp430 \
+	| nds32 | nds32le | nds32be \
+	| nios | nios2 | nios2eb | nios2el \
+	| ns16k | ns32k \
+	| open8 | or1k | or1knd | or32 \
+	| pdp10 | pj | pjl \
+	| powerpc | powerpc64 | powerpc64le | powerpcle \
+	| pru \
+	| pyramid \
+	| riscv32 | riscv64 \
+	| rl78 | rx \
+	| score \
+	| sh | sh[1234] | sh[24]a | sh[24]aeb | sh[23]e | sh[234]eb | sheb | shbe | shle | sh[1234]le | sh3ele \
+	| sh64 | sh64le \
+	| sparc | sparc64 | sparc64b | sparc64v | sparc86x | sparclet | sparclite \
+	| sparcv8 | sparcv9 | sparcv9b | sparcv9v \
+	| spu \
+	| tahoe | tic4x | tic54x | tic55x | tic6x | tic80 | tron \
+	| ubicom32 \
+	| v850 | v850e | v850e1 | v850e2 | v850es | v850e2v3 \
+	| visium \
+	| wasm32 \
+	| x86 | xc16x | xstormy16 | xtensa \
+	| z8k | z80)
+		basic_machine=$basic_machine-unknown
+		;;
+	c54x)
+		basic_machine=tic54x-unknown
+		;;
+	c55x)
+		basic_machine=tic55x-unknown
+		;;
+	c6x)
+		basic_machine=tic6x-unknown
+		;;
+	leon|leon[3-9])
+		basic_machine=sparc-$basic_machine
+		;;
+	m6811 | m68hc11 | m6812 | m68hc12 | m68hcs12x | nvptx | picochip)
+		basic_machine=$basic_machine-unknown
+		os=-none
+		;;
+	m88110 | m680[12346]0 | m683?2 | m68360 | m5200 | v70 | w65)
+		;;
+	ms1)
+		basic_machine=mt-unknown
+		;;
+
+	strongarm | thumb | xscale)
+		basic_machine=arm-unknown
+		;;
+	xgate)
+		basic_machine=$basic_machine-unknown
+		os=-none
+		;;
+	xscaleeb)
+		basic_machine=armeb-unknown
+		;;
+
+	xscaleel)
+		basic_machine=armel-unknown
+		;;
+
+	# We use `pc' rather than `unknown'
+	# because (1) that's what they normally are, and
+	# (2) the word "unknown" tends to confuse beginning users.
+	i*86 | x86_64)
+	  basic_machine=$basic_machine-pc
+	  ;;
+	# Object if more than one company name word.
+	*-*-*)
+		echo Invalid configuration \`"$1"\': machine \`"$basic_machine"\' not recognized 1>&2
+		exit 1
+		;;
+	# Recognize the basic CPU types with company name.
+	580-* \
+	| a29k-* \
+	| aarch64-* | aarch64_be-* \
+	| alpha-* | alphaev[4-8]-* | alphaev56-* | alphaev6[78]-* \
+	| alpha64-* | alpha64ev[4-8]-* | alpha64ev56-* | alpha64ev6[78]-* \
+	| alphapca5[67]-* | alpha64pca5[67]-* | arc-* | arceb-* \
+	| arm-*  | armbe-* | armle-* | armeb-* | armv*-* \
+	| avr-* | avr32-* \
+	| ba-* \
+	| be32-* | be64-* \
+	| bfin-* | bs2000-* \
+	| c[123]* | c30-* | [cjt]90-* | c4x-* \
+	| c8051-* | clipper-* | craynv-* | cydra-* \
+	| d10v-* | d30v-* | dlx-* \
+	| e2k-* | elxsi-* \
+	| f30[01]-* | f700-* | fido-* | fr30-* | frv-* | fx80-* \
+	| h8300-* | h8500-* \
+	| hppa-* | hppa1.[01]-* | hppa2.0-* | hppa2.0[nw]-* | hppa64-* \
+	| hexagon-* \
+	| i*86-* | i860-* | i960-* | ia16-* | ia64-* \
+	| ip2k-* | iq2000-* \
+	| k1om-* \
+	| le32-* | le64-* \
+	| lm32-* \
+	| m32c-* | m32r-* | m32rle-* \
+	| m68000-* | m680[012346]0-* | m68360-* | m683?2-* | m68k-* \
+	| m88110-* | m88k-* | maxq-* | mcore-* | metag-* \
+	| microblaze-* | microblazeel-* \
+	| mips-* | mipsbe-* | mipseb-* | mipsel-* | mipsle-* \
+	| mips16-* \
+	| mips64-* | mips64el-* \
+	| mips64octeon-* | mips64octeonel-* \
+	| mips64orion-* | mips64orionel-* \
+	| mips64r5900-* | mips64r5900el-* \
+	| mips64vr-* | mips64vrel-* \
+	| mips64vr4100-* | mips64vr4100el-* \
+	| mips64vr4300-* | mips64vr4300el-* \
+	| mips64vr5000-* | mips64vr5000el-* \
+	| mips64vr5900-* | mips64vr5900el-* \
+	| mipsisa32-* | mipsisa32el-* \
+	| mipsisa32r2-* | mipsisa32r2el-* \
+	| mipsisa32r6-* | mipsisa32r6el-* \
+	| mipsisa64-* | mipsisa64el-* \
+	| mipsisa64r2-* | mipsisa64r2el-* \
+	| mipsisa64r6-* | mipsisa64r6el-* \
+	| mipsisa64sb1-* | mipsisa64sb1el-* \
+	| mipsisa64sr71k-* | mipsisa64sr71kel-* \
+	| mipsr5900-* | mipsr5900el-* \
+	| mipstx39-* | mipstx39el-* \
+	| mmix-* \
+	| mt-* \
+	| msp430-* \
+	| nds32-* | nds32le-* | nds32be-* \
+	| nios-* | nios2-* | nios2eb-* | nios2el-* \
+	| none-* | np1-* | ns16k-* | ns32k-* \
+	| open8-* \
+	| or1k*-* \
+	| orion-* \
+	| pdp10-* | pdp11-* | pj-* | pjl-* | pn-* | power-* \
+	| powerpc-* | powerpc64-* | powerpc64le-* | powerpcle-* \
+	| pru-* \
+	| pyramid-* \
+	| riscv32-* | riscv64-* \
+	| rl78-* | romp-* | rs6000-* | rx-* \
+	| sh-* | sh[1234]-* | sh[24]a-* | sh[24]aeb-* | sh[23]e-* | sh[34]eb-* | sheb-* | shbe-* \
+	| shle-* | sh[1234]le-* | sh3ele-* | sh64-* | sh64le-* \
+	| sparc-* | sparc64-* | sparc64b-* | sparc64v-* | sparc86x-* | sparclet-* \
+	| sparclite-* \
+	| sparcv8-* | sparcv9-* | sparcv9b-* | sparcv9v-* | sv1-* | sx*-* \
+	| tahoe-* \
+	| tic30-* | tic4x-* | tic54x-* | tic55x-* | tic6x-* | tic80-* \
+	| tile*-* \
+	| tron-* \
+	| ubicom32-* \
+	| v850-* | v850e-* | v850e1-* | v850es-* | v850e2-* | v850e2v3-* \
+	| vax-* \
+	| visium-* \
+	| wasm32-* \
+	| we32k-* \
+	| x86-* | x86_64-* | xc16x-* | xps100-* \
+	| xstormy16-* | xtensa*-* \
+	| ymp-* \
+	| z8k-* | z80-*)
+		;;
+	# Recognize the basic CPU types without company name, with glob match.
+	xtensa*)
+		basic_machine=$basic_machine-unknown
+		;;
+	# Recognize the various machine names and aliases which stand
+	# for a CPU type and a company and sometimes even an OS.
+	386bsd)
+		basic_machine=i386-pc
+		os=-bsd
+		;;
+	3b1 | 7300 | 7300-att | att-7300 | pc7300 | safari | unixpc)
+		basic_machine=m68000-att
+		;;
+	3b*)
+		basic_machine=we32k-att
+		;;
+	a29khif)
+		basic_machine=a29k-amd
+		os=-udi
+		;;
+	abacus)
+		basic_machine=abacus-unknown
+		;;
+	adobe68k)
+		basic_machine=m68010-adobe
+		os=-scout
+		;;
+	alliant | fx80)
+		basic_machine=fx80-alliant
+		;;
+	altos | altos3068)
+		basic_machine=m68k-altos
+		;;
+	am29k)
+		basic_machine=a29k-none
+		os=-bsd
+		;;
+	amd64)
+		basic_machine=x86_64-pc
+		;;
+	amd64-*)
+		basic_machine=x86_64-`echo "$basic_machine" | sed 's/^[^-]*-//'`
+		;;
+	amdahl)
+		basic_machine=580-amdahl
+		os=-sysv
+		;;
+	amiga | amiga-*)
+		basic_machine=m68k-unknown
+		;;
+	amigaos | amigados)
+		basic_machine=m68k-unknown
+		os=-amigaos
+		;;
+	amigaunix | amix)
+		basic_machine=m68k-unknown
+		os=-sysv4
+		;;
+	apollo68)
+		basic_machine=m68k-apollo
+		os=-sysv
+		;;
+	apollo68bsd)
+		basic_machine=m68k-apollo
+		os=-bsd
+		;;
+	aros)
+		basic_machine=i386-pc
+		os=-aros
+		;;
+	asmjs)
+		basic_machine=asmjs-unknown
+		;;
+	aux)
+		basic_machine=m68k-apple
+		os=-aux
+		;;
+	balance)
+		basic_machine=ns32k-sequent
+		os=-dynix
+		;;
+	blackfin)
+		basic_machine=bfin-unknown
+		os=-linux
+		;;
+	blackfin-*)
+		basic_machine=bfin-`echo "$basic_machine" | sed 's/^[^-]*-//'`
+		os=-linux
+		;;
+	bluegene*)
+		basic_machine=powerpc-ibm
+		os=-cnk
+		;;
+	c54x-*)
+		basic_machine=tic54x-`echo "$basic_machine" | sed 's/^[^-]*-//'`
+		;;
+	c55x-*)
+		basic_machine=tic55x-`echo "$basic_machine" | sed 's/^[^-]*-//'`
+		;;
+	c6x-*)
+		basic_machine=tic6x-`echo "$basic_machine" | sed 's/^[^-]*-//'`
+		;;
+	c90)
+		basic_machine=c90-cray
+		os=-unicos
+		;;
+	cegcc)
+		basic_machine=arm-unknown
+		os=-cegcc
+		;;
+	convex-c1)
+		basic_machine=c1-convex
+		os=-bsd
+		;;
+	convex-c2)
+		basic_machine=c2-convex
+		os=-bsd
+		;;
+	convex-c32)
+		basic_machine=c32-convex
+		os=-bsd
+		;;
+	convex-c34)
+		basic_machine=c34-convex
+		os=-bsd
+		;;
+	convex-c38)
+		basic_machine=c38-convex
+		os=-bsd
+		;;
+	cray | j90)
+		basic_machine=j90-cray
+		os=-unicos
+		;;
+	craynv)
+		basic_machine=craynv-cray
+		os=-unicosmp
+		;;
+	cr16 | cr16-*)
+		basic_machine=cr16-unknown
+		os=-elf
+		;;
+	crds | unos)
+		basic_machine=m68k-crds
+		;;
+	crisv32 | crisv32-* | etraxfs*)
+		basic_machine=crisv32-axis
+		;;
+	cris | cris-* | etrax*)
+		basic_machine=cris-axis
+		;;
+	crx)
+		basic_machine=crx-unknown
+		os=-elf
+		;;
+	da30 | da30-*)
+		basic_machine=m68k-da30
+		;;
+	decstation | decstation-3100 | pmax | pmax-* | pmin | dec3100 | decstatn)
+		basic_machine=mips-dec
+		;;
+	decsystem10* | dec10*)
+		basic_machine=pdp10-dec
+		os=-tops10
+		;;
+	decsystem20* | dec20*)
+		basic_machine=pdp10-dec
+		os=-tops20
+		;;
+	delta | 3300 | motorola-3300 | motorola-delta \
+	      | 3300-motorola | delta-motorola)
+		basic_machine=m68k-motorola
+		;;
+	delta88)
+		basic_machine=m88k-motorola
+		os=-sysv3
+		;;
+	dicos)
+		basic_machine=i686-pc
+		os=-dicos
+		;;
+	djgpp)
+		basic_machine=i586-pc
+		os=-msdosdjgpp
+		;;
+	dpx20 | dpx20-*)
+		basic_machine=rs6000-bull
+		os=-bosx
+		;;
+	dpx2*)
+		basic_machine=m68k-bull
+		os=-sysv3
+		;;
+	e500v[12])
+		basic_machine=powerpc-unknown
+		os=$os"spe"
+		;;
+	e500v[12]-*)
+		basic_machine=powerpc-`echo "$basic_machine" | sed 's/^[^-]*-//'`
+		os=$os"spe"
+		;;
+	ebmon29k)
+		basic_machine=a29k-amd
+		os=-ebmon
+		;;
+	elxsi)
+		basic_machine=elxsi-elxsi
+		os=-bsd
+		;;
+	encore | umax | mmax)
+		basic_machine=ns32k-encore
+		;;
+	es1800 | OSE68k | ose68k | ose | OSE)
+		basic_machine=m68k-ericsson
+		os=-ose
+		;;
+	fx2800)
+		basic_machine=i860-alliant
+		;;
+	genix)
+		basic_machine=ns32k-ns
+		;;
+	gmicro)
+		basic_machine=tron-gmicro
+		os=-sysv
+		;;
+	go32)
+		basic_machine=i386-pc
+		os=-go32
+		;;
+	h3050r* | hiux*)
+		basic_machine=hppa1.1-hitachi
+		os=-hiuxwe2
+		;;
+	h8300hms)
+		basic_machine=h8300-hitachi
+		os=-hms
+		;;
+	h8300xray)
+		basic_machine=h8300-hitachi
+		os=-xray
+		;;
+	h8500hms)
+		basic_machine=h8500-hitachi
+		os=-hms
+		;;
+	harris)
+		basic_machine=m88k-harris
+		os=-sysv3
+		;;
+	hp300-*)
+		basic_machine=m68k-hp
+		;;
+	hp300bsd)
+		basic_machine=m68k-hp
+		os=-bsd
+		;;
+	hp300hpux)
+		basic_machine=m68k-hp
+		os=-hpux
+		;;
+	hp3k9[0-9][0-9] | hp9[0-9][0-9])
+		basic_machine=hppa1.0-hp
+		;;
+	hp9k2[0-9][0-9] | hp9k31[0-9])
+		basic_machine=m68000-hp
+		;;
+	hp9k3[2-9][0-9])
+		basic_machine=m68k-hp
+		;;
+	hp9k6[0-9][0-9] | hp6[0-9][0-9])
+		basic_machine=hppa1.0-hp
+		;;
+	hp9k7[0-79][0-9] | hp7[0-79][0-9])
+		basic_machine=hppa1.1-hp
+		;;
+	hp9k78[0-9] | hp78[0-9])
+		# FIXME: really hppa2.0-hp
+		basic_machine=hppa1.1-hp
+		;;
+	hp9k8[67]1 | hp8[67]1 | hp9k80[24] | hp80[24] | hp9k8[78]9 | hp8[78]9 | hp9k893 | hp893)
+		# FIXME: really hppa2.0-hp
+		basic_machine=hppa1.1-hp
+		;;
+	hp9k8[0-9][13679] | hp8[0-9][13679])
+		basic_machine=hppa1.1-hp
+		;;
+	hp9k8[0-9][0-9] | hp8[0-9][0-9])
+		basic_machine=hppa1.0-hp
+		;;
+	hppaosf)
+		basic_machine=hppa1.1-hp
+		os=-osf
+		;;
+	hppro)
+		basic_machine=hppa1.1-hp
+		os=-proelf
+		;;
+	i370-ibm* | ibm*)
+		basic_machine=i370-ibm
+		;;
+	i*86v32)
+		basic_machine=`echo "$1" | sed -e 's/86.*/86-pc/'`
+		os=-sysv32
+		;;
+	i*86v4*)
+		basic_machine=`echo "$1" | sed -e 's/86.*/86-pc/'`
+		os=-sysv4
+		;;
+	i*86v)
+		basic_machine=`echo "$1" | sed -e 's/86.*/86-pc/'`
+		os=-sysv
+		;;
+	i*86sol2)
+		basic_machine=`echo "$1" | sed -e 's/86.*/86-pc/'`
+		os=-solaris2
+		;;
+	i386mach)
+		basic_machine=i386-mach
+		os=-mach
+		;;
+	vsta)
+		basic_machine=i386-unknown
+		os=-vsta
+		;;
+	iris | iris4d)
+		basic_machine=mips-sgi
+		case $os in
+		    -irix*)
+			;;
+		    *)
+			os=-irix4
+			;;
+		esac
+		;;
+	isi68 | isi)
+		basic_machine=m68k-isi
+		os=-sysv
+		;;
+	leon-*|leon[3-9]-*)
+		basic_machine=sparc-`echo "$basic_machine" | sed 's/-.*//'`
+		;;
+	m68knommu)
+		basic_machine=m68k-unknown
+		os=-linux
+		;;
+	m68knommu-*)
+		basic_machine=m68k-`echo "$basic_machine" | sed 's/^[^-]*-//'`
+		os=-linux
+		;;
+	magnum | m3230)
+		basic_machine=mips-mips
+		os=-sysv
+		;;
+	merlin)
+		basic_machine=ns32k-utek
+		os=-sysv
+		;;
+	microblaze*)
+		basic_machine=microblaze-xilinx
+		;;
+	mingw64)
+		basic_machine=x86_64-pc
+		os=-mingw64
+		;;
+	mingw32)
+		basic_machine=i686-pc
+		os=-mingw32
+		;;
+	mingw32ce)
+		basic_machine=arm-unknown
+		os=-mingw32ce
+		;;
+	miniframe)
+		basic_machine=m68000-convergent
+		;;
+	*mint | -mint[0-9]* | *MiNT | *MiNT[0-9]*)
+		basic_machine=m68k-atari
+		os=-mint
+		;;
+	mips3*-*)
+		basic_machine=`echo "$basic_machine" | sed -e 's/mips3/mips64/'`
+		;;
+	mips3*)
+		basic_machine=`echo "$basic_machine" | sed -e 's/mips3/mips64/'`-unknown
+		;;
+	monitor)
+		basic_machine=m68k-rom68k
+		os=-coff
+		;;
+	morphos)
+		basic_machine=powerpc-unknown
+		os=-morphos
+		;;
+	moxiebox)
+		basic_machine=moxie-unknown
+		os=-moxiebox
+		;;
+	msdos)
+		basic_machine=i386-pc
+		os=-msdos
+		;;
+	ms1-*)
+		basic_machine=`echo "$basic_machine" | sed -e 's/ms1-/mt-/'`
+		;;
+	msys)
+		basic_machine=i686-pc
+		os=-msys
+		;;
+	mvs)
+		basic_machine=i370-ibm
+		os=-mvs
+		;;
+	nacl)
+		basic_machine=le32-unknown
+		os=-nacl
+		;;
+	ncr3000)
+		basic_machine=i486-ncr
+		os=-sysv4
+		;;
+	netbsd386)
+		basic_machine=i386-unknown
+		os=-netbsd
+		;;
+	netwinder)
+		basic_machine=armv4l-rebel
+		os=-linux
+		;;
+	news | news700 | news800 | news900)
+		basic_machine=m68k-sony
+		os=-newsos
+		;;
+	news1000)
+		basic_machine=m68030-sony
+		os=-newsos
+		;;
+	news-3600 | risc-news)
+		basic_machine=mips-sony
+		os=-newsos
+		;;
+	necv70)
+		basic_machine=v70-nec
+		os=-sysv
+		;;
+	next | m*-next)
+		basic_machine=m68k-next
+		case $os in
+		    -nextstep* )
+			;;
+		    -ns2*)
+		      os=-nextstep2
+			;;
+		    *)
+		      os=-nextstep3
+			;;
+		esac
+		;;
+	nh3000)
+		basic_machine=m68k-harris
+		os=-cxux
+		;;
+	nh[45]000)
+		basic_machine=m88k-harris
+		os=-cxux
+		;;
+	nindy960)
+		basic_machine=i960-intel
+		os=-nindy
+		;;
+	mon960)
+		basic_machine=i960-intel
+		os=-mon960
+		;;
+	nonstopux)
+		basic_machine=mips-compaq
+		os=-nonstopux
+		;;
+	np1)
+		basic_machine=np1-gould
+		;;
+	neo-tandem)
+		basic_machine=neo-tandem
+		;;
+	nse-tandem)
+		basic_machine=nse-tandem
+		;;
+	nsr-tandem)
+		basic_machine=nsr-tandem
+		;;
+	nsv-tandem)
+		basic_machine=nsv-tandem
+		;;
+	nsx-tandem)
+		basic_machine=nsx-tandem
+		;;
+	op50n-* | op60c-*)
+		basic_machine=hppa1.1-oki
+		os=-proelf
+		;;
+	openrisc | openrisc-*)
+		basic_machine=or32-unknown
+		;;
+	os400)
+		basic_machine=powerpc-ibm
+		os=-os400
+		;;
+	OSE68000 | ose68000)
+		basic_machine=m68000-ericsson
+		os=-ose
+		;;
+	os68k)
+		basic_machine=m68k-none
+		os=-os68k
+		;;
+	pa-hitachi)
+		basic_machine=hppa1.1-hitachi
+		os=-hiuxwe2
+		;;
+	paragon)
+		basic_machine=i860-intel
+		os=-osf
+		;;
+	parisc)
+		basic_machine=hppa-unknown
+		os=-linux
+		;;
+	parisc-*)
+		basic_machine=hppa-`echo "$basic_machine" | sed 's/^[^-]*-//'`
+		os=-linux
+		;;
+	pbd)
+		basic_machine=sparc-tti
+		;;
+	pbb)
+		basic_machine=m68k-tti
+		;;
+	pc532 | pc532-*)
+		basic_machine=ns32k-pc532
+		;;
+	pc98)
+		basic_machine=i386-pc
+		;;
+	pc98-*)
+		basic_machine=i386-`echo "$basic_machine" | sed 's/^[^-]*-//'`
+		;;
+	pentium | p5 | k5 | k6 | nexgen | viac3)
+		basic_machine=i586-pc
+		;;
+	pentiumpro | p6 | 6x86 | athlon | athlon_*)
+		basic_machine=i686-pc
+		;;
+	pentiumii | pentium2 | pentiumiii | pentium3)
+		basic_machine=i686-pc
+		;;
+	pentium4)
+		basic_machine=i786-pc
+		;;
+	pentium-* | p5-* | k5-* | k6-* | nexgen-* | viac3-*)
+		basic_machine=i586-`echo "$basic_machine" | sed 's/^[^-]*-//'`
+		;;
+	pentiumpro-* | p6-* | 6x86-* | athlon-*)
+		basic_machine=i686-`echo "$basic_machine" | sed 's/^[^-]*-//'`
+		;;
+	pentiumii-* | pentium2-* | pentiumiii-* | pentium3-*)
+		basic_machine=i686-`echo "$basic_machine" | sed 's/^[^-]*-//'`
+		;;
+	pentium4-*)
+		basic_machine=i786-`echo "$basic_machine" | sed 's/^[^-]*-//'`
+		;;
+	pn)
+		basic_machine=pn-gould
+		;;
+	power)	basic_machine=power-ibm
+		;;
+	ppc | ppcbe)	basic_machine=powerpc-unknown
+		;;
+	ppc-* | ppcbe-*)
+		basic_machine=powerpc-`echo "$basic_machine" | sed 's/^[^-]*-//'`
+		;;
+	ppcle | powerpclittle)
+		basic_machine=powerpcle-unknown
+		;;
+	ppcle-* | powerpclittle-*)
+		basic_machine=powerpcle-`echo "$basic_machine" | sed 's/^[^-]*-//'`
+		;;
+	ppc64)	basic_machine=powerpc64-unknown
+		;;
+	ppc64-*) basic_machine=powerpc64-`echo "$basic_machine" | sed 's/^[^-]*-//'`
+		;;
+	ppc64le | powerpc64little)
+		basic_machine=powerpc64le-unknown
+		;;
+	ppc64le-* | powerpc64little-*)
+		basic_machine=powerpc64le-`echo "$basic_machine" | sed 's/^[^-]*-//'`
+		;;
+	ps2)
+		basic_machine=i386-ibm
+		;;
+	pw32)
+		basic_machine=i586-unknown
+		os=-pw32
+		;;
+	rdos | rdos64)
+		basic_machine=x86_64-pc
+		os=-rdos
+		;;
+	rdos32)
+		basic_machine=i386-pc
+		os=-rdos
+		;;
+	rom68k)
+		basic_machine=m68k-rom68k
+		os=-coff
+		;;
+	rm[46]00)
+		basic_machine=mips-siemens
+		;;
+	rtpc | rtpc-*)
+		basic_machine=romp-ibm
+		;;
+	s390 | s390-*)
+		basic_machine=s390-ibm
+		;;
+	s390x | s390x-*)
+		basic_machine=s390x-ibm
+		;;
+	sa29200)
+		basic_machine=a29k-amd
+		os=-udi
+		;;
+	sb1)
+		basic_machine=mipsisa64sb1-unknown
+		;;
+	sb1el)
+		basic_machine=mipsisa64sb1el-unknown
+		;;
+	sde)
+		basic_machine=mipsisa32-sde
+		os=-elf
+		;;
+	sei)
+		basic_machine=mips-sei
+		os=-seiux
+		;;
+	sequent)
+		basic_machine=i386-sequent
+		;;
+	sh5el)
+		basic_machine=sh5le-unknown
+		;;
+	simso-wrs)
+		basic_machine=sparclite-wrs
+		os=-vxworks
+		;;
+	sps7)
+		basic_machine=m68k-bull
+		os=-sysv2
+		;;
+	spur)
+		basic_machine=spur-unknown
+		;;
+	st2000)
+		basic_machine=m68k-tandem
+		;;
+	stratus)
+		basic_machine=i860-stratus
+		os=-sysv4
+		;;
+	strongarm-* | thumb-*)
+		basic_machine=arm-`echo "$basic_machine" | sed 's/^[^-]*-//'`
+		;;
+	sun2)
+		basic_machine=m68000-sun
+		;;
+	sun2os3)
+		basic_machine=m68000-sun
+		os=-sunos3
+		;;
+	sun2os4)
+		basic_machine=m68000-sun
+		os=-sunos4
+		;;
+	sun3os3)
+		basic_machine=m68k-sun
+		os=-sunos3
+		;;
+	sun3os4)
+		basic_machine=m68k-sun
+		os=-sunos4
+		;;
+	sun4os3)
+		basic_machine=sparc-sun
+		os=-sunos3
+		;;
+	sun4os4)
+		basic_machine=sparc-sun
+		os=-sunos4
+		;;
+	sun4sol2)
+		basic_machine=sparc-sun
+		os=-solaris2
+		;;
+	sun3 | sun3-*)
+		basic_machine=m68k-sun
+		;;
+	sun4)
+		basic_machine=sparc-sun
+		;;
+	sun386 | sun386i | roadrunner)
+		basic_machine=i386-sun
+		;;
+	sv1)
+		basic_machine=sv1-cray
+		os=-unicos
+		;;
+	symmetry)
+		basic_machine=i386-sequent
+		os=-dynix
+		;;
+	t3e)
+		basic_machine=alphaev5-cray
+		os=-unicos
+		;;
+	t90)
+		basic_machine=t90-cray
+		os=-unicos
+		;;
+	tile*)
+		basic_machine=$basic_machine-unknown
+		os=-linux-gnu
+		;;
+	tx39)
+		basic_machine=mipstx39-unknown
+		;;
+	tx39el)
+		basic_machine=mipstx39el-unknown
+		;;
+	toad1)
+		basic_machine=pdp10-xkl
+		os=-tops20
+		;;
+	tower | tower-32)
+		basic_machine=m68k-ncr
+		;;
+	tpf)
+		basic_machine=s390x-ibm
+		os=-tpf
+		;;
+	udi29k)
+		basic_machine=a29k-amd
+		os=-udi
+		;;
+	ultra3)
+		basic_machine=a29k-nyu
+		os=-sym1
+		;;
+	v810 | necv810)
+		basic_machine=v810-nec
+		os=-none
+		;;
+	vaxv)
+		basic_machine=vax-dec
+		os=-sysv
+		;;
+	vms)
+		basic_machine=vax-dec
+		os=-vms
+		;;
+	vpp*|vx|vx-*)
+		basic_machine=f301-fujitsu
+		;;
+	vxworks960)
+		basic_machine=i960-wrs
+		os=-vxworks
+		;;
+	vxworks68)
+		basic_machine=m68k-wrs
+		os=-vxworks
+		;;
+	vxworks29k)
+		basic_machine=a29k-wrs
+		os=-vxworks
+		;;
+	w65*)
+		basic_machine=w65-wdc
+		os=-none
+		;;
+	w89k-*)
+		basic_machine=hppa1.1-winbond
+		os=-proelf
+		;;
+	x64)
+		basic_machine=x86_64-pc
+		;;
+	xbox)
+		basic_machine=i686-pc
+		os=-mingw32
+		;;
+	xps | xps100)
+		basic_machine=xps100-honeywell
+		;;
+	xscale-* | xscalee[bl]-*)
+		basic_machine=`echo "$basic_machine" | sed 's/^xscale/arm/'`
+		;;
+	ymp)
+		basic_machine=ymp-cray
+		os=-unicos
+		;;
+	none)
+		basic_machine=none-none
+		os=-none
+		;;
+
+# Here we handle the default manufacturer of certain CPU types.  It is in
+# some cases the only manufacturer, in others, it is the most popular.
+	w89k)
+		basic_machine=hppa1.1-winbond
+		;;
+	op50n)
+		basic_machine=hppa1.1-oki
+		;;
+	op60c)
+		basic_machine=hppa1.1-oki
+		;;
+	romp)
+		basic_machine=romp-ibm
+		;;
+	mmix)
+		basic_machine=mmix-knuth
+		;;
+	rs6000)
+		basic_machine=rs6000-ibm
+		;;
+	vax)
+		basic_machine=vax-dec
+		;;
+	pdp11)
+		basic_machine=pdp11-dec
+		;;
+	we32k)
+		basic_machine=we32k-att
+		;;
+	sh[1234] | sh[24]a | sh[24]aeb | sh[34]eb | sh[1234]le | sh[23]ele)
+		basic_machine=sh-unknown
+		;;
+	cydra)
+		basic_machine=cydra-cydrome
+		;;
+	orion)
+		basic_machine=orion-highlevel
+		;;
+	orion105)
+		basic_machine=clipper-highlevel
+		;;
+	mac | mpw | mac-mpw)
+		basic_machine=m68k-apple
+		;;
+	pmac | pmac-mpw)
+		basic_machine=powerpc-apple
+		;;
+	*-unknown)
+		# Make sure to match an already-canonicalized machine name.
+		;;
+	*)
+		echo Invalid configuration \`"$1"\': machine \`"$basic_machine"\' not recognized 1>&2
+		exit 1
+		;;
+esac
+
+# Here we canonicalize certain aliases for manufacturers.
+case $basic_machine in
+	*-digital*)
+		basic_machine=`echo "$basic_machine" | sed 's/digital.*/dec/'`
+		;;
+	*-commodore*)
+		basic_machine=`echo "$basic_machine" | sed 's/commodore.*/cbm/'`
+		;;
+	*)
+		;;
+esac
+
+# Decode manufacturer-specific aliases for certain operating systems.
+
+if [ x"$os" != x"" ]
+then
+case $os in
+	# First match some system type aliases that might get confused
+	# with valid system types.
+	# -solaris* is a basic system type, with this one exception.
+	-auroraux)
+		os=-auroraux
+		;;
+	-solaris1 | -solaris1.*)
+		os=`echo $os | sed -e 's|solaris1|sunos4|'`
+		;;
+	-solaris)
+		os=-solaris2
+		;;
+	-unixware*)
+		os=-sysv4.2uw
+		;;
+	-gnu/linux*)
+		os=`echo $os | sed -e 's|gnu/linux|linux-gnu|'`
+		;;
+	# es1800 is here to avoid being matched by es* (a different OS)
+	-es1800*)
+		os=-ose
+		;;
+	# Now accept the basic system types.
+	# The portable systems comes first.
+	# Each alternative MUST end in a * to match a version number.
+	# -sysv* is not here because it comes later, after sysvr4.
+	-gnu* | -bsd* | -mach* | -minix* | -genix* | -ultrix* | -irix* \
+	      | -*vms* | -sco* | -esix* | -isc* | -aix* | -cnk* | -sunos | -sunos[34]*\
+	      | -hpux* | -unos* | -osf* | -luna* | -dgux* | -auroraux* | -solaris* \
+	      | -sym* | -kopensolaris* | -plan9* \
+	      | -amigaos* | -amigados* | -msdos* | -newsos* | -unicos* | -aof* \
+	      | -aos* | -aros* | -cloudabi* | -sortix* \
+	      | -nindy* | -vxsim* | -vxworks* | -ebmon* | -hms* | -mvs* \
+	      | -clix* | -riscos* | -uniplus* | -iris* | -rtu* | -xenix* \
+	      | -hiux* | -knetbsd* | -mirbsd* | -netbsd* \
+	      | -bitrig* | -openbsd* | -solidbsd* | -libertybsd* \
+	      | -ekkobsd* | -kfreebsd* | -freebsd* | -riscix* | -lynxos* \
+	      | -bosx* | -nextstep* | -cxux* | -aout* | -elf* | -oabi* \
+	      | -ptx* | -coff* | -ecoff* | -winnt* | -domain* | -vsta* \
+	      | -udi* | -eabi* | -lites* | -ieee* | -go32* | -aux* \
+	      | -chorusos* | -chorusrdb* | -cegcc* | -glidix* \
+	      | -cygwin* | -msys* | -pe* | -psos* | -moss* | -proelf* | -rtems* \
+	      | -midipix* | -mingw32* | -mingw64* | -linux-gnu* | -linux-android* \
+	      | -linux-newlib* | -linux-musl* | -linux-uclibc* \
+	      | -uxpv* | -beos* | -mpeix* | -udk* | -moxiebox* \
+	      | -interix* | -uwin* | -mks* | -rhapsody* | -darwin* \
+	      | -openstep* | -oskit* | -conix* | -pw32* | -nonstopux* \
+	      | -storm-chaos* | -tops10* | -tenex* | -tops20* | -its* \
+	      | -os2* | -vos* | -palmos* | -uclinux* | -nucleus* \
+	      | -morphos* | -superux* | -rtmk* | -windiss* \
+	      | -powermax* | -dnix* | -nx6 | -nx7 | -sei* | -dragonfly* \
+	      | -skyos* | -haiku* | -rdos* | -toppers* | -drops* | -es* \
+	      | -onefs* | -tirtos* | -phoenix* | -fuchsia* | -redox* | -bme* \
+	      | -midnightbsd*)
+	# Remember, each alternative MUST END IN *, to match a version number.
+		;;
+	-qnx*)
+		case $basic_machine in
+		    x86-* | i*86-*)
+			;;
+		    *)
+			os=-nto$os
+			;;
+		esac
+		;;
+	-nto-qnx*)
+		;;
+	-nto*)
+		os=`echo $os | sed -e 's|nto|nto-qnx|'`
+		;;
+	-sim | -xray | -os68k* | -v88r* \
+	      | -windows* | -osx | -abug | -netware* | -os9* \
+	      | -macos* | -mpw* | -magic* | -mmixware* | -mon960* | -lnews*)
+		;;
+	-mac*)
+		os=`echo "$os" | sed -e 's|mac|macos|'`
+		;;
+	-linux-dietlibc)
+		os=-linux-dietlibc
+		;;
+	-linux*)
+		os=`echo $os | sed -e 's|linux|linux-gnu|'`
+		;;
+	-sunos5*)
+		os=`echo "$os" | sed -e 's|sunos5|solaris2|'`
+		;;
+	-sunos6*)
+		os=`echo "$os" | sed -e 's|sunos6|solaris3|'`
+		;;
+	-opened*)
+		os=-openedition
+		;;
+	-os400*)
+		os=-os400
+		;;
+	-wince*)
+		os=-wince
+		;;
+	-utek*)
+		os=-bsd
+		;;
+	-dynix*)
+		os=-bsd
+		;;
+	-acis*)
+		os=-aos
+		;;
+	-atheos*)
+		os=-atheos
+		;;
+	-syllable*)
+		os=-syllable
+		;;
+	-386bsd)
+		os=-bsd
+		;;
+	-ctix* | -uts*)
+		os=-sysv
+		;;
+	-nova*)
+		os=-rtmk-nova
+		;;
+	-ns2)
+		os=-nextstep2
+		;;
+	-nsk*)
+		os=-nsk
+		;;
+	# Preserve the version number of sinix5.
+	-sinix5.*)
+		os=`echo $os | sed -e 's|sinix|sysv|'`
+		;;
+	-sinix*)
+		os=-sysv4
+		;;
+	-tpf*)
+		os=-tpf
+		;;
+	-triton*)
+		os=-sysv3
+		;;
+	-oss*)
+		os=-sysv3
+		;;
+	-svr4*)
+		os=-sysv4
+		;;
+	-svr3)
+		os=-sysv3
+		;;
+	-sysvr4)
+		os=-sysv4
+		;;
+	# This must come after -sysvr4.
+	-sysv*)
+		;;
+	-ose*)
+		os=-ose
+		;;
+	-*mint | -mint[0-9]* | -*MiNT | -MiNT[0-9]*)
+		os=-mint
+		;;
+	-zvmoe)
+		os=-zvmoe
+		;;
+	-dicos*)
+		os=-dicos
+		;;
+	-pikeos*)
+		# Until real need of OS specific support for
+		# particular features comes up, bare metal
+		# configurations are quite functional.
+		case $basic_machine in
+		    arm*)
+			os=-eabi
+			;;
+		    *)
+			os=-elf
+			;;
+		esac
+		;;
+	-nacl*)
+		;;
+	-ios)
+		;;
+	-none)
+		;;
+	*)
+		# Get rid of the `-' at the beginning of $os.
+		os=`echo $os | sed 's/[^-]*-//'`
+		echo Invalid configuration \`"$1"\': system \`"$os"\' not recognized 1>&2
+		exit 1
+		;;
+esac
+else
+
+# Here we handle the default operating systems that come with various machines.
+# The value should be what the vendor currently ships out the door with their
+# machine or put another way, the most popular os provided with the machine.
+
+# Note that if you're going to try to match "-MANUFACTURER" here (say,
+# "-sun"), then you have to tell the case statement up towards the top
+# that MANUFACTURER isn't an operating system.  Otherwise, code above
+# will signal an error saying that MANUFACTURER isn't an operating
+# system, and we'll never get to this point.
+
+case $basic_machine in
+	score-*)
+		os=-elf
+		;;
+	spu-*)
+		os=-elf
+		;;
+	*-acorn)
+		os=-riscix1.2
+		;;
+	arm*-rebel)
+		os=-linux
+		;;
+	arm*-semi)
+		os=-aout
+		;;
+	c4x-* | tic4x-*)
+		os=-coff
+		;;
+	c8051-*)
+		os=-elf
+		;;
+	hexagon-*)
+		os=-elf
+		;;
+	tic54x-*)
+		os=-coff
+		;;
+	tic55x-*)
+		os=-coff
+		;;
+	tic6x-*)
+		os=-coff
+		;;
+	# This must come before the *-dec entry.
+	pdp10-*)
+		os=-tops20
+		;;
+	pdp11-*)
+		os=-none
+		;;
+	*-dec | vax-*)
+		os=-ultrix4.2
+		;;
+	m68*-apollo)
+		os=-domain
+		;;
+	i386-sun)
+		os=-sunos4.0.2
+		;;
+	m68000-sun)
+		os=-sunos3
+		;;
+	m68*-cisco)
+		os=-aout
+		;;
+	mep-*)
+		os=-elf
+		;;
+	mips*-cisco)
+		os=-elf
+		;;
+	mips*-*)
+		os=-elf
+		;;
+	or32-*)
+		os=-coff
+		;;
+	*-tti)	# must be before sparc entry or we get the wrong os.
+		os=-sysv3
+		;;
+	sparc-* | *-sun)
+		os=-sunos4.1.1
+		;;
+	pru-*)
+		os=-elf
+		;;
+	*-be)
+		os=-beos
+		;;
+	*-ibm)
+		os=-aix
+		;;
+	*-knuth)
+		os=-mmixware
+		;;
+	*-wec)
+		os=-proelf
+		;;
+	*-winbond)
+		os=-proelf
+		;;
+	*-oki)
+		os=-proelf
+		;;
+	*-hp)
+		os=-hpux
+		;;
+	*-hitachi)
+		os=-hiux
+		;;
+	i860-* | *-att | *-ncr | *-altos | *-motorola | *-convergent)
+		os=-sysv
+		;;
+	*-cbm)
+		os=-amigaos
+		;;
+	*-dg)
+		os=-dgux
+		;;
+	*-dolphin)
+		os=-sysv3
+		;;
+	m68k-ccur)
+		os=-rtu
+		;;
+	m88k-omron*)
+		os=-luna
+		;;
+	*-next)
+		os=-nextstep
+		;;
+	*-sequent)
+		os=-ptx
+		;;
+	*-crds)
+		os=-unos
+		;;
+	*-ns)
+		os=-genix
+		;;
+	i370-*)
+		os=-mvs
+		;;
+	*-gould)
+		os=-sysv
+		;;
+	*-highlevel)
+		os=-bsd
+		;;
+	*-encore)
+		os=-bsd
+		;;
+	*-sgi)
+		os=-irix
+		;;
+	*-siemens)
+		os=-sysv4
+		;;
+	*-masscomp)
+		os=-rtu
+		;;
+	f30[01]-fujitsu | f700-fujitsu)
+		os=-uxpv
+		;;
+	*-rom68k)
+		os=-coff
+		;;
+	*-*bug)
+		os=-coff
+		;;
+	*-apple)
+		os=-macos
+		;;
+	*-atari*)
+		os=-mint
+		;;
+	*)
+		os=-none
+		;;
+esac
+fi
+
+# Here we handle the case where we know the os, and the CPU type, but not the
+# manufacturer.  We pick the logical manufacturer.
+vendor=unknown
+case $basic_machine in
+	*-unknown)
+		case $os in
+			-riscix*)
+				vendor=acorn
+				;;
+			-sunos*)
+				vendor=sun
+				;;
+			-cnk*|-aix*)
+				vendor=ibm
+				;;
+			-beos*)
+				vendor=be
+				;;
+			-hpux*)
+				vendor=hp
+				;;
+			-mpeix*)
+				vendor=hp
+				;;
+			-hiux*)
+				vendor=hitachi
+				;;
+			-unos*)
+				vendor=crds
+				;;
+			-dgux*)
+				vendor=dg
+				;;
+			-luna*)
+				vendor=omron
+				;;
+			-genix*)
+				vendor=ns
+				;;
+			-mvs* | -opened*)
+				vendor=ibm
+				;;
+			-os400*)
+				vendor=ibm
+				;;
+			-ptx*)
+				vendor=sequent
+				;;
+			-tpf*)
+				vendor=ibm
+				;;
+			-vxsim* | -vxworks* | -windiss*)
+				vendor=wrs
+				;;
+			-aux*)
+				vendor=apple
+				;;
+			-hms*)
+				vendor=hitachi
+				;;
+			-mpw* | -macos*)
+				vendor=apple
+				;;
+			-*mint | -mint[0-9]* | -*MiNT | -MiNT[0-9]*)
+				vendor=atari
+				;;
+			-vos*)
+				vendor=stratus
+				;;
+		esac
+		basic_machine=`echo "$basic_machine" | sed "s/unknown/$vendor/"`
+		;;
+esac
+
+echo "$basic_machine$os"
+exit
+
+# Local variables:
+# eval: (add-hook 'write-file-functions 'time-stamp)
+# time-stamp-start: "timestamp='"
+# time-stamp-format: "%:y-%02m-%02d"
+# time-stamp-end: "'"
+# End:
diff --git a/src/third_party/unwind/dist/config/depcomp b/src/third_party/unwind/dist/config/depcomp
new file mode 100755
index 00000000000..b39f98f9ae9
--- /dev/null
+++ b/src/third_party/unwind/dist/config/depcomp
@@ -0,0 +1,791 @@
+#! /bin/sh
+# depcomp - compile a program generating dependencies as side-effects
+
+scriptversion=2016-01-11.22; # UTC
+
+# Copyright (C) 1999-2017 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+# Originally written by Alexandre Oliva <oliva@dcc.unicamp.br>.
+
+case $1 in
+  '')
+    echo "$0: No command.  Try '$0 --help' for more information." 1>&2
+    exit 1;
+    ;;
+  -h | --h*)
+    cat <<\EOF
+Usage: depcomp [--help] [--version] PROGRAM [ARGS]
+
+Run PROGRAMS ARGS to compile a file, generating dependencies
+as side-effects.
+
+Environment variables:
+  depmode     Dependency tracking mode.
+  source      Source file read by 'PROGRAMS ARGS'.
+  object      Object file output by 'PROGRAMS ARGS'.
+  DEPDIR      directory where to store dependencies.
+  depfile     Dependency file to output.
+  tmpdepfile  Temporary file to use when outputting dependencies.
+  libtool     Whether libtool is used (yes/no).
+
+Report bugs to <bug-automake@gnu.org>.
+EOF
+    exit $?
+    ;;
+  -v | --v*)
+    echo "depcomp $scriptversion"
+    exit $?
+    ;;
+esac
+
+# Get the directory component of the given path, and save it in the
+# global variables '$dir'.  Note that this directory component will
+# be either empty or ending with a '/' character.  This is deliberate.
+set_dir_from ()
+{
+  case $1 in
+    */*) dir=`echo "$1" | sed -e 's|/[^/]*$|/|'`;;
+      *) dir=;;
+  esac
+}
+
+# Get the suffix-stripped basename of the given path, and save it the
+# global variable '$base'.
+set_base_from ()
+{
+  base=`echo "$1" | sed -e 's|^.*/||' -e 's/\.[^.]*$//'`
+}
+
+# If no dependency file was actually created by the compiler invocation,
+# we still have to create a dummy depfile, to avoid errors with the
+# Makefile "include basename.Plo" scheme.
+make_dummy_depfile ()
+{
+  echo "#dummy" > "$depfile"
+}
+
+# Factor out some common post-processing of the generated depfile.
+# Requires the auxiliary global variable '$tmpdepfile' to be set.
+aix_post_process_depfile ()
+{
+  # If the compiler actually managed to produce a dependency file,
+  # post-process it.
+  if test -f "$tmpdepfile"; then
+    # Each line is of the form 'foo.o: dependency.h'.
+    # Do two passes, one to just change these to
+    #   $object: dependency.h
+    # and one to simply output
+    #   dependency.h:
+    # which is needed to avoid the deleted-header problem.
+    { sed -e "s,^.*\.[$lower]*:,$object:," < "$tmpdepfile"
+      sed -e "s,^.*\.[$lower]*:[$tab ]*,," -e 's,$,:,' < "$tmpdepfile"
+    } > "$depfile"
+    rm -f "$tmpdepfile"
+  else
+    make_dummy_depfile
+  fi
+}
+
+# A tabulation character.
+tab='	'
+# A newline character.
+nl='
+'
+# Character ranges might be problematic outside the C locale.
+# These definitions help.
+upper=ABCDEFGHIJKLMNOPQRSTUVWXYZ
+lower=abcdefghijklmnopqrstuvwxyz
+digits=0123456789
+alpha=${upper}${lower}
+
+if test -z "$depmode" || test -z "$source" || test -z "$object"; then
+  echo "depcomp: Variables source, object and depmode must be set" 1>&2
+  exit 1
+fi
+
+# Dependencies for sub/bar.o or sub/bar.obj go into sub/.deps/bar.Po.
+depfile=${depfile-`echo "$object" |
+  sed 's|[^\\/]*$|'${DEPDIR-.deps}'/&|;s|\.\([^.]*\)$|.P\1|;s|Pobj$|Po|'`}
+tmpdepfile=${tmpdepfile-`echo "$depfile" | sed 's/\.\([^.]*\)$/.T\1/'`}
+
+rm -f "$tmpdepfile"
+
+# Avoid interferences from the environment.
+gccflag= dashmflag=
+
+# Some modes work just like other modes, but use different flags.  We
+# parameterize here, but still list the modes in the big case below,
+# to make depend.m4 easier to write.  Note that we *cannot* use a case
+# here, because this file can only contain one case statement.
+if test "$depmode" = hp; then
+  # HP compiler uses -M and no extra arg.
+  gccflag=-M
+  depmode=gcc
+fi
+
+if test "$depmode" = dashXmstdout; then
+  # This is just like dashmstdout with a different argument.
+  dashmflag=-xM
+  depmode=dashmstdout
+fi
+
+cygpath_u="cygpath -u -f -"
+if test "$depmode" = msvcmsys; then
+  # This is just like msvisualcpp but w/o cygpath translation.
+  # Just convert the backslash-escaped backslashes to single forward
+  # slashes to satisfy depend.m4
+  cygpath_u='sed s,\\\\,/,g'
+  depmode=msvisualcpp
+fi
+
+if test "$depmode" = msvc7msys; then
+  # This is just like msvc7 but w/o cygpath translation.
+  # Just convert the backslash-escaped backslashes to single forward
+  # slashes to satisfy depend.m4
+  cygpath_u='sed s,\\\\,/,g'
+  depmode=msvc7
+fi
+
+if test "$depmode" = xlc; then
+  # IBM C/C++ Compilers xlc/xlC can output gcc-like dependency information.
+  gccflag=-qmakedep=gcc,-MF
+  depmode=gcc
+fi
+
+case "$depmode" in
+gcc3)
+## gcc 3 implements dependency tracking that does exactly what
+## we want.  Yay!  Note: for some reason libtool 1.4 doesn't like
+## it if -MD -MP comes after the -MF stuff.  Hmm.
+## Unfortunately, FreeBSD c89 acceptance of flags depends upon
+## the command line argument order; so add the flags where they
+## appear in depend2.am.  Note that the slowdown incurred here
+## affects only configure: in makefiles, %FASTDEP% shortcuts this.
+  for arg
+  do
+    case $arg in
+    -c) set fnord "$@" -MT "$object" -MD -MP -MF "$tmpdepfile" "$arg" ;;
+    *)  set fnord "$@" "$arg" ;;
+    esac
+    shift # fnord
+    shift # $arg
+  done
+  "$@"
+  stat=$?
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  mv "$tmpdepfile" "$depfile"
+  ;;
+
+gcc)
+## Note that this doesn't just cater to obsosete pre-3.x GCC compilers.
+## but also to in-use compilers like IMB xlc/xlC and the HP C compiler.
+## (see the conditional assignment to $gccflag above).
+## There are various ways to get dependency output from gcc.  Here's
+## why we pick this rather obscure method:
+## - Don't want to use -MD because we'd like the dependencies to end
+##   up in a subdir.  Having to rename by hand is ugly.
+##   (We might end up doing this anyway to support other compilers.)
+## - The DEPENDENCIES_OUTPUT environment variable makes gcc act like
+##   -MM, not -M (despite what the docs say).  Also, it might not be
+##   supported by the other compilers which use the 'gcc' depmode.
+## - Using -M directly means running the compiler twice (even worse
+##   than renaming).
+  if test -z "$gccflag"; then
+    gccflag=-MD,
+  fi
+  "$@" -Wp,"$gccflag$tmpdepfile"
+  stat=$?
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+  echo "$object : \\" > "$depfile"
+  # The second -e expression handles DOS-style file names with drive
+  # letters.
+  sed -e 's/^[^:]*: / /' \
+      -e 's/^['$alpha']:\/[^:]*: / /' < "$tmpdepfile" >> "$depfile"
+## This next piece of magic avoids the "deleted header file" problem.
+## The problem is that when a header file which appears in a .P file
+## is deleted, the dependency causes make to die (because there is
+## typically no way to rebuild the header).  We avoid this by adding
+## dummy dependencies for each header file.  Too bad gcc doesn't do
+## this for us directly.
+## Some versions of gcc put a space before the ':'.  On the theory
+## that the space means something, we add a space to the output as
+## well.  hp depmode also adds that space, but also prefixes the VPATH
+## to the object.  Take care to not repeat it in the output.
+## Some versions of the HPUX 10.20 sed can't process this invocation
+## correctly.  Breaking it into two sed invocations is a workaround.
+  tr ' ' "$nl" < "$tmpdepfile" \
+    | sed -e 's/^\\$//' -e '/^$/d' -e "s|.*$object$||" -e '/:$/d' \
+    | sed -e 's/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+hp)
+  # This case exists only to let depend.m4 do its work.  It works by
+  # looking at the text of this script.  This case will never be run,
+  # since it is checked for above.
+  exit 1
+  ;;
+
+sgi)
+  if test "$libtool" = yes; then
+    "$@" "-Wp,-MDupdate,$tmpdepfile"
+  else
+    "$@" -MDupdate "$tmpdepfile"
+  fi
+  stat=$?
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+
+  if test -f "$tmpdepfile"; then  # yes, the sourcefile depend on other files
+    echo "$object : \\" > "$depfile"
+    # Clip off the initial element (the dependent).  Don't try to be
+    # clever and replace this with sed code, as IRIX sed won't handle
+    # lines with more than a fixed number of characters (4096 in
+    # IRIX 6.2 sed, 8192 in IRIX 6.5).  We also remove comment lines;
+    # the IRIX cc adds comments like '#:fec' to the end of the
+    # dependency line.
+    tr ' ' "$nl" < "$tmpdepfile" \
+      | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' \
+      | tr "$nl" ' ' >> "$depfile"
+    echo >> "$depfile"
+    # The second pass generates a dummy entry for each header file.
+    tr ' ' "$nl" < "$tmpdepfile" \
+      | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' -e 's/$/:/' \
+      >> "$depfile"
+  else
+    make_dummy_depfile
+  fi
+  rm -f "$tmpdepfile"
+  ;;
+
+xlc)
+  # This case exists only to let depend.m4 do its work.  It works by
+  # looking at the text of this script.  This case will never be run,
+  # since it is checked for above.
+  exit 1
+  ;;
+
+aix)
+  # The C for AIX Compiler uses -M and outputs the dependencies
+  # in a .u file.  In older versions, this file always lives in the
+  # current directory.  Also, the AIX compiler puts '$object:' at the
+  # start of each line; $object doesn't have directory information.
+  # Version 6 uses the directory in both cases.
+  set_dir_from "$object"
+  set_base_from "$object"
+  if test "$libtool" = yes; then
+    tmpdepfile1=$dir$base.u
+    tmpdepfile2=$base.u
+    tmpdepfile3=$dir.libs/$base.u
+    "$@" -Wc,-M
+  else
+    tmpdepfile1=$dir$base.u
+    tmpdepfile2=$dir$base.u
+    tmpdepfile3=$dir$base.u
+    "$@" -M
+  fi
+  stat=$?
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
+    exit $stat
+  fi
+
+  for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
+  do
+    test -f "$tmpdepfile" && break
+  done
+  aix_post_process_depfile
+  ;;
+
+tcc)
+  # tcc (Tiny C Compiler) understand '-MD -MF file' since version 0.9.26
+  # FIXME: That version still under development at the moment of writing.
+  #        Make that this statement remains true also for stable, released
+  #        versions.
+  # It will wrap lines (doesn't matter whether long or short) with a
+  # trailing '\', as in:
+  #
+  #   foo.o : \
+  #    foo.c \
+  #    foo.h \
+  #
+  # It will put a trailing '\' even on the last line, and will use leading
+  # spaces rather than leading tabs (at least since its commit 0394caf7
+  # "Emit spaces for -MD").
+  "$@" -MD -MF "$tmpdepfile"
+  stat=$?
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+  # Each non-empty line is of the form 'foo.o : \' or ' dep.h \'.
+  # We have to change lines of the first kind to '$object: \'.
+  sed -e "s|.*:|$object :|" < "$tmpdepfile" > "$depfile"
+  # And for each line of the second kind, we have to emit a 'dep.h:'
+  # dummy dependency, to avoid the deleted-header problem.
+  sed -n -e 's|^  *\(.*\) *\\$|\1:|p' < "$tmpdepfile" >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+## The order of this option in the case statement is important, since the
+## shell code in configure will try each of these formats in the order
+## listed in this file.  A plain '-MD' option would be understood by many
+## compilers, so we must ensure this comes after the gcc and icc options.
+pgcc)
+  # Portland's C compiler understands '-MD'.
+  # Will always output deps to 'file.d' where file is the root name of the
+  # source file under compilation, even if file resides in a subdirectory.
+  # The object file name does not affect the name of the '.d' file.
+  # pgcc 10.2 will output
+  #    foo.o: sub/foo.c sub/foo.h
+  # and will wrap long lines using '\' :
+  #    foo.o: sub/foo.c ... \
+  #     sub/foo.h ... \
+  #     ...
+  set_dir_from "$object"
+  # Use the source, not the object, to determine the base name, since
+  # that's sadly what pgcc will do too.
+  set_base_from "$source"
+  tmpdepfile=$base.d
+
+  # For projects that build the same source file twice into different object
+  # files, the pgcc approach of using the *source* file root name can cause
+  # problems in parallel builds.  Use a locking strategy to avoid stomping on
+  # the same $tmpdepfile.
+  lockdir=$base.d-lock
+  trap "
+    echo '$0: caught signal, cleaning up...' >&2
+    rmdir '$lockdir'
+    exit 1
+  " 1 2 13 15
+  numtries=100
+  i=$numtries
+  while test $i -gt 0; do
+    # mkdir is a portable test-and-set.
+    if mkdir "$lockdir" 2>/dev/null; then
+      # This process acquired the lock.
+      "$@" -MD
+      stat=$?
+      # Release the lock.
+      rmdir "$lockdir"
+      break
+    else
+      # If the lock is being held by a different process, wait
+      # until the winning process is done or we timeout.
+      while test -d "$lockdir" && test $i -gt 0; do
+        sleep 1
+        i=`expr $i - 1`
+      done
+    fi
+    i=`expr $i - 1`
+  done
+  trap - 1 2 13 15
+  if test $i -le 0; then
+    echo "$0: failed to acquire lock after $numtries attempts" >&2
+    echo "$0: check lockdir '$lockdir'" >&2
+    exit 1
+  fi
+
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+  # Each line is of the form `foo.o: dependent.h',
+  # or `foo.o: dep1.h dep2.h \', or ` dep3.h dep4.h \'.
+  # Do two passes, one to just change these to
+  # `$object: dependent.h' and one to simply `dependent.h:'.
+  sed "s,^[^:]*:,$object :," < "$tmpdepfile" > "$depfile"
+  # Some versions of the HPUX 10.20 sed can't process this invocation
+  # correctly.  Breaking it into two sed invocations is a workaround.
+  sed 's,^[^:]*: \(.*\)$,\1,;s/^\\$//;/^$/d;/:$/d' < "$tmpdepfile" \
+    | sed -e 's/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+hp2)
+  # The "hp" stanza above does not work with aCC (C++) and HP's ia64
+  # compilers, which have integrated preprocessors.  The correct option
+  # to use with these is +Maked; it writes dependencies to a file named
+  # 'foo.d', which lands next to the object file, wherever that
+  # happens to be.
+  # Much of this is similar to the tru64 case; see comments there.
+  set_dir_from  "$object"
+  set_base_from "$object"
+  if test "$libtool" = yes; then
+    tmpdepfile1=$dir$base.d
+    tmpdepfile2=$dir.libs/$base.d
+    "$@" -Wc,+Maked
+  else
+    tmpdepfile1=$dir$base.d
+    tmpdepfile2=$dir$base.d
+    "$@" +Maked
+  fi
+  stat=$?
+  if test $stat -ne 0; then
+     rm -f "$tmpdepfile1" "$tmpdepfile2"
+     exit $stat
+  fi
+
+  for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2"
+  do
+    test -f "$tmpdepfile" && break
+  done
+  if test -f "$tmpdepfile"; then
+    sed -e "s,^.*\.[$lower]*:,$object:," "$tmpdepfile" > "$depfile"
+    # Add 'dependent.h:' lines.
+    sed -ne '2,${
+               s/^ *//
+               s/ \\*$//
+               s/$/:/
+               p
+             }' "$tmpdepfile" >> "$depfile"
+  else
+    make_dummy_depfile
+  fi
+  rm -f "$tmpdepfile" "$tmpdepfile2"
+  ;;
+
+tru64)
+  # The Tru64 compiler uses -MD to generate dependencies as a side
+  # effect.  'cc -MD -o foo.o ...' puts the dependencies into 'foo.o.d'.
+  # At least on Alpha/Redhat 6.1, Compaq CCC V6.2-504 seems to put
+  # dependencies in 'foo.d' instead, so we check for that too.
+  # Subdirectories are respected.
+  set_dir_from  "$object"
+  set_base_from "$object"
+
+  if test "$libtool" = yes; then
+    # Libtool generates 2 separate objects for the 2 libraries.  These
+    # two compilations output dependencies in $dir.libs/$base.o.d and
+    # in $dir$base.o.d.  We have to check for both files, because
+    # one of the two compilations can be disabled.  We should prefer
+    # $dir$base.o.d over $dir.libs/$base.o.d because the latter is
+    # automatically cleaned when .libs/ is deleted, while ignoring
+    # the former would cause a distcleancheck panic.
+    tmpdepfile1=$dir$base.o.d          # libtool 1.5
+    tmpdepfile2=$dir.libs/$base.o.d    # Likewise.
+    tmpdepfile3=$dir.libs/$base.d      # Compaq CCC V6.2-504
+    "$@" -Wc,-MD
+  else
+    tmpdepfile1=$dir$base.d
+    tmpdepfile2=$dir$base.d
+    tmpdepfile3=$dir$base.d
+    "$@" -MD
+  fi
+
+  stat=$?
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
+    exit $stat
+  fi
+
+  for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
+  do
+    test -f "$tmpdepfile" && break
+  done
+  # Same post-processing that is required for AIX mode.
+  aix_post_process_depfile
+  ;;
+
+msvc7)
+  if test "$libtool" = yes; then
+    showIncludes=-Wc,-showIncludes
+  else
+    showIncludes=-showIncludes
+  fi
+  "$@" $showIncludes > "$tmpdepfile"
+  stat=$?
+  grep -v '^Note: including file: ' "$tmpdepfile"
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+  echo "$object : \\" > "$depfile"
+  # The first sed program below extracts the file names and escapes
+  # backslashes for cygpath.  The second sed program outputs the file
+  # name when reading, but also accumulates all include files in the
+  # hold buffer in order to output them again at the end.  This only
+  # works with sed implementations that can handle large buffers.
+  sed < "$tmpdepfile" -n '
+/^Note: including file:  *\(.*\)/ {
+  s//\1/
+  s/\\/\\\\/g
+  p
+}' | $cygpath_u | sort -u | sed -n '
+s/ /\\ /g
+s/\(.*\)/'"$tab"'\1 \\/p
+s/.\(.*\) \\/\1:/
+H
+$ {
+  s/.*/'"$tab"'/
+  G
+  p
+}' >> "$depfile"
+  echo >> "$depfile" # make sure the fragment doesn't end with a backslash
+  rm -f "$tmpdepfile"
+  ;;
+
+msvc7msys)
+  # This case exists only to let depend.m4 do its work.  It works by
+  # looking at the text of this script.  This case will never be run,
+  # since it is checked for above.
+  exit 1
+  ;;
+
+#nosideeffect)
+  # This comment above is used by automake to tell side-effect
+  # dependency tracking mechanisms from slower ones.
+
+dashmstdout)
+  # Important note: in order to support this mode, a compiler *must*
+  # always write the preprocessed file to stdout, regardless of -o.
+  "$@" || exit $?
+
+  # Remove the call to Libtool.
+  if test "$libtool" = yes; then
+    while test "X$1" != 'X--mode=compile'; do
+      shift
+    done
+    shift
+  fi
+
+  # Remove '-o $object'.
+  IFS=" "
+  for arg
+  do
+    case $arg in
+    -o)
+      shift
+      ;;
+    $object)
+      shift
+      ;;
+    *)
+      set fnord "$@" "$arg"
+      shift # fnord
+      shift # $arg
+      ;;
+    esac
+  done
+
+  test -z "$dashmflag" && dashmflag=-M
+  # Require at least two characters before searching for ':'
+  # in the target name.  This is to cope with DOS-style filenames:
+  # a dependency such as 'c:/foo/bar' could be seen as target 'c' otherwise.
+  "$@" $dashmflag |
+    sed "s|^[$tab ]*[^:$tab ][^:][^:]*:[$tab ]*|$object: |" > "$tmpdepfile"
+  rm -f "$depfile"
+  cat < "$tmpdepfile" > "$depfile"
+  # Some versions of the HPUX 10.20 sed can't process this sed invocation
+  # correctly.  Breaking it into two sed invocations is a workaround.
+  tr ' ' "$nl" < "$tmpdepfile" \
+    | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \
+    | sed -e 's/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+dashXmstdout)
+  # This case only exists to satisfy depend.m4.  It is never actually
+  # run, as this mode is specially recognized in the preamble.
+  exit 1
+  ;;
+
+makedepend)
+  "$@" || exit $?
+  # Remove any Libtool call
+  if test "$libtool" = yes; then
+    while test "X$1" != 'X--mode=compile'; do
+      shift
+    done
+    shift
+  fi
+  # X makedepend
+  shift
+  cleared=no eat=no
+  for arg
+  do
+    case $cleared in
+    no)
+      set ""; shift
+      cleared=yes ;;
+    esac
+    if test $eat = yes; then
+      eat=no
+      continue
+    fi
+    case "$arg" in
+    -D*|-I*)
+      set fnord "$@" "$arg"; shift ;;
+    # Strip any option that makedepend may not understand.  Remove
+    # the object too, otherwise makedepend will parse it as a source file.
+    -arch)
+      eat=yes ;;
+    -*|$object)
+      ;;
+    *)
+      set fnord "$@" "$arg"; shift ;;
+    esac
+  done
+  obj_suffix=`echo "$object" | sed 's/^.*\././'`
+  touch "$tmpdepfile"
+  ${MAKEDEPEND-makedepend} -o"$obj_suffix" -f"$tmpdepfile" "$@"
+  rm -f "$depfile"
+  # makedepend may prepend the VPATH from the source file name to the object.
+  # No need to regex-escape $object, excess matching of '.' is harmless.
+  sed "s|^.*\($object *:\)|\1|" "$tmpdepfile" > "$depfile"
+  # Some versions of the HPUX 10.20 sed can't process the last invocation
+  # correctly.  Breaking it into two sed invocations is a workaround.
+  sed '1,2d' "$tmpdepfile" \
+    | tr ' ' "$nl" \
+    | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \
+    | sed -e 's/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile" "$tmpdepfile".bak
+  ;;
+
+cpp)
+  # Important note: in order to support this mode, a compiler *must*
+  # always write the preprocessed file to stdout.
+  "$@" || exit $?
+
+  # Remove the call to Libtool.
+  if test "$libtool" = yes; then
+    while test "X$1" != 'X--mode=compile'; do
+      shift
+    done
+    shift
+  fi
+
+  # Remove '-o $object'.
+  IFS=" "
+  for arg
+  do
+    case $arg in
+    -o)
+      shift
+      ;;
+    $object)
+      shift
+      ;;
+    *)
+      set fnord "$@" "$arg"
+      shift # fnord
+      shift # $arg
+      ;;
+    esac
+  done
+
+  "$@" -E \
+    | sed -n -e '/^# [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
+             -e '/^#line [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
+    | sed '$ s: \\$::' > "$tmpdepfile"
+  rm -f "$depfile"
+  echo "$object : \\" > "$depfile"
+  cat < "$tmpdepfile" >> "$depfile"
+  sed < "$tmpdepfile" '/^$/d;s/^ //;s/ \\$//;s/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+msvisualcpp)
+  # Important note: in order to support this mode, a compiler *must*
+  # always write the preprocessed file to stdout.
+  "$@" || exit $?
+
+  # Remove the call to Libtool.
+  if test "$libtool" = yes; then
+    while test "X$1" != 'X--mode=compile'; do
+      shift
+    done
+    shift
+  fi
+
+  IFS=" "
+  for arg
+  do
+    case "$arg" in
+    -o)
+      shift
+      ;;
+    $object)
+      shift
+      ;;
+    "-Gm"|"/Gm"|"-Gi"|"/Gi"|"-ZI"|"/ZI")
+        set fnord "$@"
+        shift
+        shift
+        ;;
+    *)
+        set fnord "$@" "$arg"
+        shift
+        shift
+        ;;
+    esac
+  done
+  "$@" -E 2>/dev/null |
+  sed -n '/^#line [0-9][0-9]* "\([^"]*\)"/ s::\1:p' | $cygpath_u | sort -u > "$tmpdepfile"
+  rm -f "$depfile"
+  echo "$object : \\" > "$depfile"
+  sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::'"$tab"'\1 \\:p' >> "$depfile"
+  echo "$tab" >> "$depfile"
+  sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::\1\::p' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+msvcmsys)
+  # This case exists only to let depend.m4 do its work.  It works by
+  # looking at the text of this script.  This case will never be run,
+  # since it is checked for above.
+  exit 1
+  ;;
+
+none)
+  exec "$@"
+  ;;
+
+*)
+  echo "Unknown depmode $depmode" 1>&2
+  exit 1
+  ;;
+esac
+
+exit 0
+
+# Local Variables:
+# mode: shell-script
+# sh-indentation: 2
+# eval: (add-hook 'write-file-hooks 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC0"
+# time-stamp-end: "; # UTC"
+# End:
diff --git a/src/third_party/unwind/dist/config/install-sh b/src/third_party/unwind/dist/config/install-sh
new file mode 100755
index 00000000000..59990a10492
--- /dev/null
+++ b/src/third_party/unwind/dist/config/install-sh
@@ -0,0 +1,508 @@
+#!/bin/sh
+# install - install a program, script, or datafile
+
+scriptversion=2014-09-12.12; # UTC
+
+# This originates from X11R5 (mit/util/scripts/install.sh), which was
+# later released in X11R6 (xc/config/util/install.sh) with the
+# following copyright and license.
+#
+# Copyright (C) 1994 X Consortium
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to
+# deal in the Software without restriction, including without limitation the
+# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+# sell copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+# X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+# AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNEC-
+# TION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+#
+# Except as contained in this notice, the name of the X Consortium shall not
+# be used in advertising or otherwise to promote the sale, use or other deal-
+# ings in this Software without prior written authorization from the X Consor-
+# tium.
+#
+#
+# FSF changes to this file are in the public domain.
+#
+# Calling this script install-sh is preferred over install.sh, to prevent
+# 'make' implicit rules from creating a file called install from it
+# when there is no Makefile.
+#
+# This script is compatible with the BSD install script, but was written
+# from scratch.
+
+tab='	'
+nl='
+'
+IFS=" $tab$nl"
+
+# Set DOITPROG to "echo" to test this script.
+
+doit=${DOITPROG-}
+doit_exec=${doit:-exec}
+
+# Put in absolute file names if you don't have them in your path;
+# or use environment vars.
+
+chgrpprog=${CHGRPPROG-chgrp}
+chmodprog=${CHMODPROG-chmod}
+chownprog=${CHOWNPROG-chown}
+cmpprog=${CMPPROG-cmp}
+cpprog=${CPPROG-cp}
+mkdirprog=${MKDIRPROG-mkdir}
+mvprog=${MVPROG-mv}
+rmprog=${RMPROG-rm}
+stripprog=${STRIPPROG-strip}
+
+posix_mkdir=
+
+# Desired mode of installed file.
+mode=0755
+
+chgrpcmd=
+chmodcmd=$chmodprog
+chowncmd=
+mvcmd=$mvprog
+rmcmd="$rmprog -f"
+stripcmd=
+
+src=
+dst=
+dir_arg=
+dst_arg=
+
+copy_on_change=false
+is_target_a_directory=possibly
+
+usage="\
+Usage: $0 [OPTION]... [-T] SRCFILE DSTFILE
+   or: $0 [OPTION]... SRCFILES... DIRECTORY
+   or: $0 [OPTION]... -t DIRECTORY SRCFILES...
+   or: $0 [OPTION]... -d DIRECTORIES...
+
+In the 1st form, copy SRCFILE to DSTFILE.
+In the 2nd and 3rd, copy all SRCFILES to DIRECTORY.
+In the 4th, create DIRECTORIES.
+
+Options:
+     --help     display this help and exit.
+     --version  display version info and exit.
+
+  -c            (ignored)
+  -C            install only if different (preserve the last data modification time)
+  -d            create directories instead of installing files.
+  -g GROUP      $chgrpprog installed files to GROUP.
+  -m MODE       $chmodprog installed files to MODE.
+  -o USER       $chownprog installed files to USER.
+  -s            $stripprog installed files.
+  -t DIRECTORY  install into DIRECTORY.
+  -T            report an error if DSTFILE is a directory.
+
+Environment variables override the default commands:
+  CHGRPPROG CHMODPROG CHOWNPROG CMPPROG CPPROG MKDIRPROG MVPROG
+  RMPROG STRIPPROG
+"
+
+while test $# -ne 0; do
+  case $1 in
+    -c) ;;
+
+    -C) copy_on_change=true;;
+
+    -d) dir_arg=true;;
+
+    -g) chgrpcmd="$chgrpprog $2"
+        shift;;
+
+    --help) echo "$usage"; exit $?;;
+
+    -m) mode=$2
+        case $mode in
+          *' '* | *"$tab"* | *"$nl"* | *'*'* | *'?'* | *'['*)
+            echo "$0: invalid mode: $mode" >&2
+            exit 1;;
+        esac
+        shift;;
+
+    -o) chowncmd="$chownprog $2"
+        shift;;
+
+    -s) stripcmd=$stripprog;;
+
+    -t)
+        is_target_a_directory=always
+        dst_arg=$2
+        # Protect names problematic for 'test' and other utilities.
+        case $dst_arg in
+          -* | [=\(\)!]) dst_arg=./$dst_arg;;
+        esac
+        shift;;
+
+    -T) is_target_a_directory=never;;
+
+    --version) echo "$0 $scriptversion"; exit $?;;
+
+    --) shift
+        break;;
+
+    -*) echo "$0: invalid option: $1" >&2
+        exit 1;;
+
+    *)  break;;
+  esac
+  shift
+done
+
+# We allow the use of options -d and -T together, by making -d
+# take the precedence; this is for compatibility with GNU install.
+
+if test -n "$dir_arg"; then
+  if test -n "$dst_arg"; then
+    echo "$0: target directory not allowed when installing a directory." >&2
+    exit 1
+  fi
+fi
+
+if test $# -ne 0 && test -z "$dir_arg$dst_arg"; then
+  # When -d is used, all remaining arguments are directories to create.
+  # When -t is used, the destination is already specified.
+  # Otherwise, the last argument is the destination.  Remove it from $@.
+  for arg
+  do
+    if test -n "$dst_arg"; then
+      # $@ is not empty: it contains at least $arg.
+      set fnord "$@" "$dst_arg"
+      shift # fnord
+    fi
+    shift # arg
+    dst_arg=$arg
+    # Protect names problematic for 'test' and other utilities.
+    case $dst_arg in
+      -* | [=\(\)!]) dst_arg=./$dst_arg;;
+    esac
+  done
+fi
+
+if test $# -eq 0; then
+  if test -z "$dir_arg"; then
+    echo "$0: no input file specified." >&2
+    exit 1
+  fi
+  # It's OK to call 'install-sh -d' without argument.
+  # This can happen when creating conditional directories.
+  exit 0
+fi
+
+if test -z "$dir_arg"; then
+  if test $# -gt 1 || test "$is_target_a_directory" = always; then
+    if test ! -d "$dst_arg"; then
+      echo "$0: $dst_arg: Is not a directory." >&2
+      exit 1
+    fi
+  fi
+fi
+
+if test -z "$dir_arg"; then
+  do_exit='(exit $ret); exit $ret'
+  trap "ret=129; $do_exit" 1
+  trap "ret=130; $do_exit" 2
+  trap "ret=141; $do_exit" 13
+  trap "ret=143; $do_exit" 15
+
+  # Set umask so as not to create temps with too-generous modes.
+  # However, 'strip' requires both read and write access to temps.
+  case $mode in
+    # Optimize common cases.
+    *644) cp_umask=133;;
+    *755) cp_umask=22;;
+
+    *[0-7])
+      if test -z "$stripcmd"; then
+        u_plus_rw=
+      else
+        u_plus_rw='% 200'
+      fi
+      cp_umask=`expr '(' 777 - $mode % 1000 ')' $u_plus_rw`;;
+    *)
+      if test -z "$stripcmd"; then
+        u_plus_rw=
+      else
+        u_plus_rw=,u+rw
+      fi
+      cp_umask=$mode$u_plus_rw;;
+  esac
+fi
+
+for src
+do
+  # Protect names problematic for 'test' and other utilities.
+  case $src in
+    -* | [=\(\)!]) src=./$src;;
+  esac
+
+  if test -n "$dir_arg"; then
+    dst=$src
+    dstdir=$dst
+    test -d "$dstdir"
+    dstdir_status=$?
+  else
+
+    # Waiting for this to be detected by the "$cpprog $src $dsttmp" command
+    # might cause directories to be created, which would be especially bad
+    # if $src (and thus $dsttmp) contains '*'.
+    if test ! -f "$src" && test ! -d "$src"; then
+      echo "$0: $src does not exist." >&2
+      exit 1
+    fi
+
+    if test -z "$dst_arg"; then
+      echo "$0: no destination specified." >&2
+      exit 1
+    fi
+    dst=$dst_arg
+
+    # If destination is a directory, append the input filename; won't work
+    # if double slashes aren't ignored.
+    if test -d "$dst"; then
+      if test "$is_target_a_directory" = never; then
+        echo "$0: $dst_arg: Is a directory" >&2
+        exit 1
+      fi
+      dstdir=$dst
+      dst=$dstdir/`basename "$src"`
+      dstdir_status=0
+    else
+      dstdir=`dirname "$dst"`
+      test -d "$dstdir"
+      dstdir_status=$?
+    fi
+  fi
+
+  obsolete_mkdir_used=false
+
+  if test $dstdir_status != 0; then
+    case $posix_mkdir in
+      '')
+        # Create intermediate dirs using mode 755 as modified by the umask.
+        # This is like FreeBSD 'install' as of 1997-10-28.
+        umask=`umask`
+        case $stripcmd.$umask in
+          # Optimize common cases.
+          *[2367][2367]) mkdir_umask=$umask;;
+          .*0[02][02] | .[02][02] | .[02]) mkdir_umask=22;;
+
+          *[0-7])
+            mkdir_umask=`expr $umask + 22 \
+              - $umask % 100 % 40 + $umask % 20 \
+              - $umask % 10 % 4 + $umask % 2
+            `;;
+          *) mkdir_umask=$umask,go-w;;
+        esac
+
+        # With -d, create the new directory with the user-specified mode.
+        # Otherwise, rely on $mkdir_umask.
+        if test -n "$dir_arg"; then
+          mkdir_mode=-m$mode
+        else
+          mkdir_mode=
+        fi
+
+        posix_mkdir=false
+        case $umask in
+          *[123567][0-7][0-7])
+            # POSIX mkdir -p sets u+wx bits regardless of umask, which
+            # is incompatible with FreeBSD 'install' when (umask & 300) != 0.
+            ;;
+          *)
+            # $RANDOM is not portable (e.g. dash);  use it when possible to
+            # lower collision chance
+            tmpdir=${TMPDIR-/tmp}/ins$RANDOM-$$
+            trap 'ret=$?; rmdir "$tmpdir/a/b" "$tmpdir/a" "$tmpdir" 2>/dev/null; exit $ret' 0
+
+            # As "mkdir -p" follows symlinks and we work in /tmp possibly;  so
+            # create the $tmpdir first (and fail if unsuccessful) to make sure
+            # that nobody tries to guess the $tmpdir name.
+            if (umask $mkdir_umask &&
+                $mkdirprog $mkdir_mode "$tmpdir" &&
+                exec $mkdirprog $mkdir_mode -p -- "$tmpdir/a/b") >/dev/null 2>&1
+            then
+              if test -z "$dir_arg" || {
+                   # Check for POSIX incompatibilities with -m.
+                   # HP-UX 11.23 and IRIX 6.5 mkdir -m -p sets group- or
+                   # other-writable bit of parent directory when it shouldn't.
+                   # FreeBSD 6.1 mkdir -m -p sets mode of existing directory.
+                   test_tmpdir="$tmpdir/a"
+                   ls_ld_tmpdir=`ls -ld "$test_tmpdir"`
+                   case $ls_ld_tmpdir in
+                     d????-?r-*) different_mode=700;;
+                     d????-?--*) different_mode=755;;
+                     *) false;;
+                   esac &&
+                   $mkdirprog -m$different_mode -p -- "$test_tmpdir" && {
+                     ls_ld_tmpdir_1=`ls -ld "$test_tmpdir"`
+                     test "$ls_ld_tmpdir" = "$ls_ld_tmpdir_1"
+                   }
+                 }
+              then posix_mkdir=:
+              fi
+              rmdir "$tmpdir/a/b" "$tmpdir/a" "$tmpdir"
+            else
+              # Remove any dirs left behind by ancient mkdir implementations.
+              rmdir ./$mkdir_mode ./-p ./-- "$tmpdir" 2>/dev/null
+            fi
+            trap '' 0;;
+        esac;;
+    esac
+
+    if
+      $posix_mkdir && (
+        umask $mkdir_umask &&
+        $doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir"
+      )
+    then :
+    else
+
+      # The umask is ridiculous, or mkdir does not conform to POSIX,
+      # or it failed possibly due to a race condition.  Create the
+      # directory the slow way, step by step, checking for races as we go.
+
+      case $dstdir in
+        /*) prefix='/';;
+        [-=\(\)!]*) prefix='./';;
+        *)  prefix='';;
+      esac
+
+      oIFS=$IFS
+      IFS=/
+      set -f
+      set fnord $dstdir
+      shift
+      set +f
+      IFS=$oIFS
+
+      prefixes=
+
+      for d
+      do
+        test X"$d" = X && continue
+
+        prefix=$prefix$d
+        if test -d "$prefix"; then
+          prefixes=
+        else
+          if $posix_mkdir; then
+            (umask=$mkdir_umask &&
+             $doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir") && break
+            # Don't fail if two instances are running concurrently.
+            test -d "$prefix" || exit 1
+          else
+            case $prefix in
+              *\'*) qprefix=`echo "$prefix" | sed "s/'/'\\\\\\\\''/g"`;;
+              *) qprefix=$prefix;;
+            esac
+            prefixes="$prefixes '$qprefix'"
+          fi
+        fi
+        prefix=$prefix/
+      done
+
+      if test -n "$prefixes"; then
+        # Don't fail if two instances are running concurrently.
+        (umask $mkdir_umask &&
+         eval "\$doit_exec \$mkdirprog $prefixes") ||
+          test -d "$dstdir" || exit 1
+        obsolete_mkdir_used=true
+      fi
+    fi
+  fi
+
+  if test -n "$dir_arg"; then
+    { test -z "$chowncmd" || $doit $chowncmd "$dst"; } &&
+    { test -z "$chgrpcmd" || $doit $chgrpcmd "$dst"; } &&
+    { test "$obsolete_mkdir_used$chowncmd$chgrpcmd" = false ||
+      test -z "$chmodcmd" || $doit $chmodcmd $mode "$dst"; } || exit 1
+  else
+
+    # Make a couple of temp file names in the proper directory.
+    dsttmp=$dstdir/_inst.$$_
+    rmtmp=$dstdir/_rm.$$_
+
+    # Trap to clean up those temp files at exit.
+    trap 'ret=$?; rm -f "$dsttmp" "$rmtmp" && exit $ret' 0
+
+    # Copy the file name to the temp name.
+    (umask $cp_umask && $doit_exec $cpprog "$src" "$dsttmp") &&
+
+    # and set any options; do chmod last to preserve setuid bits.
+    #
+    # If any of these fail, we abort the whole thing.  If we want to
+    # ignore errors from any of these, just make sure not to ignore
+    # errors from the above "$doit $cpprog $src $dsttmp" command.
+    #
+    { test -z "$chowncmd" || $doit $chowncmd "$dsttmp"; } &&
+    { test -z "$chgrpcmd" || $doit $chgrpcmd "$dsttmp"; } &&
+    { test -z "$stripcmd" || $doit $stripcmd "$dsttmp"; } &&
+    { test -z "$chmodcmd" || $doit $chmodcmd $mode "$dsttmp"; } &&
+
+    # If -C, don't bother to copy if it wouldn't change the file.
+    if $copy_on_change &&
+       old=`LC_ALL=C ls -dlL "$dst"     2>/dev/null` &&
+       new=`LC_ALL=C ls -dlL "$dsttmp"  2>/dev/null` &&
+       set -f &&
+       set X $old && old=:$2:$4:$5:$6 &&
+       set X $new && new=:$2:$4:$5:$6 &&
+       set +f &&
+       test "$old" = "$new" &&
+       $cmpprog "$dst" "$dsttmp" >/dev/null 2>&1
+    then
+      rm -f "$dsttmp"
+    else
+      # Rename the file to the real destination.
+      $doit $mvcmd -f "$dsttmp" "$dst" 2>/dev/null ||
+
+      # The rename failed, perhaps because mv can't rename something else
+      # to itself, or perhaps because mv is so ancient that it does not
+      # support -f.
+      {
+        # Now remove or move aside any old file at destination location.
+        # We try this two ways since rm can't unlink itself on some
+        # systems and the destination file might be busy for other
+        # reasons.  In this case, the final cleanup might fail but the new
+        # file should still install successfully.
+        {
+          test ! -f "$dst" ||
+          $doit $rmcmd -f "$dst" 2>/dev/null ||
+          { $doit $mvcmd -f "$dst" "$rmtmp" 2>/dev/null &&
+            { $doit $rmcmd -f "$rmtmp" 2>/dev/null; :; }
+          } ||
+          { echo "$0: cannot unlink or rename $dst" >&2
+            (exit 1); exit 1
+          }
+        } &&
+
+        # Now rename the file to the real destination.
+        $doit $mvcmd "$dsttmp" "$dst"
+      }
+    fi || exit 1
+
+    trap '' 0
+  fi
+done
+
+# Local variables:
+# eval: (add-hook 'write-file-hooks 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC"
+# time-stamp-end: "; # UTC"
+# End:
diff --git a/src/third_party/unwind/dist/config/ltmain.sh b/src/third_party/unwind/dist/config/ltmain.sh
new file mode 100644
index 00000000000..a736cf99425
--- /dev/null
+++ b/src/third_party/unwind/dist/config/ltmain.sh
@@ -0,0 +1,11156 @@
+#! /bin/sh
+## DO NOT EDIT - This file generated from ./build-aux/ltmain.in
+##               by inline-source v2014-01-03.01
+
+# libtool (GNU libtool) 2.4.6
+# Provide generalized library-building support services.
+# Written by Gordon Matzigkeit <gord@gnu.ai.mit.edu>, 1996
+
+# Copyright (C) 1996-2015 Free Software Foundation, Inc.
+# This is free software; see the source for copying conditions.  There is NO
+# warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+# GNU Libtool is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# As a special exception to the GNU General Public License,
+# if you distribute this file as part of a program or library that
+# is built using GNU Libtool, you may include this file under the
+# same distribution terms that you use for the rest of that program.
+#
+# GNU Libtool is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+PROGRAM=libtool
+PACKAGE=libtool
+VERSION="2.4.6 Debian-2.4.6-2"
+package_revision=2.4.6
+
+
+## ------ ##
+## Usage. ##
+## ------ ##
+
+# Run './libtool --help' for help with using this script from the
+# command line.
+
+
+## ------------------------------- ##
+## User overridable command paths. ##
+## ------------------------------- ##
+
+# After configure completes, it has a better idea of some of the
+# shell tools we need than the defaults used by the functions shared
+# with bootstrap, so set those here where they can still be over-
+# ridden by the user, but otherwise take precedence.
+
+: ${AUTOCONF="autoconf"}
+: ${AUTOMAKE="automake"}
+
+
+## -------------------------- ##
+## Source external libraries. ##
+## -------------------------- ##
+
+# Much of our low-level functionality needs to be sourced from external
+# libraries, which are installed to $pkgauxdir.
+
+# Set a version string for this script.
+scriptversion=2015-01-20.17; # UTC
+
+# General shell script boiler plate, and helper functions.
+# Written by Gary V. Vaughan, 2004
+
+# Copyright (C) 2004-2015 Free Software Foundation, Inc.
+# This is free software; see the source for copying conditions.  There is NO
+# warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+
+# As a special exception to the GNU General Public License, if you distribute
+# this file as part of a program or library that is built using GNU Libtool,
+# you may include this file under the same distribution terms that you use
+# for the rest of that program.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNES FOR A PARTICULAR PURPOSE. See the GNU
+# General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+# Please report bugs or propose patches to gary@gnu.org.
+
+
+## ------ ##
+## Usage. ##
+## ------ ##
+
+# Evaluate this file near the top of your script to gain access to
+# the functions and variables defined here:
+#
+#   . `echo "$0" | ${SED-sed} 's|[^/]*$||'`/build-aux/funclib.sh
+#
+# If you need to override any of the default environment variable
+# settings, do that before evaluating this file.
+
+
+## -------------------- ##
+## Shell normalisation. ##
+## -------------------- ##
+
+# Some shells need a little help to be as Bourne compatible as possible.
+# Before doing anything else, make sure all that help has been provided!
+
+DUALCASE=1; export DUALCASE # for MKS sh
+if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then :
+  emulate sh
+  NULLCMD=:
+  # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which
+  # is contrary to our usage.  Disable this feature.
+  alias -g '${1+"$@"}'='"$@"'
+  setopt NO_GLOB_SUBST
+else
+  case `(set -o) 2>/dev/null` in *posix*) set -o posix ;; esac
+fi
+
+# NLS nuisances: We save the old values in case they are required later.
+_G_user_locale=
+_G_safe_locale=
+for _G_var in LANG LANGUAGE LC_ALL LC_CTYPE LC_COLLATE LC_MESSAGES
+do
+  eval "if test set = \"\${$_G_var+set}\"; then
+          save_$_G_var=\$$_G_var
+          $_G_var=C
+	  export $_G_var
+	  _G_user_locale=\"$_G_var=\\\$save_\$_G_var; \$_G_user_locale\"
+	  _G_safe_locale=\"$_G_var=C; \$_G_safe_locale\"
+	fi"
+done
+
+# CDPATH.
+(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
+
+# Make sure IFS has a sensible default
+sp=' '
+nl='
+'
+IFS="$sp	$nl"
+
+# There are apparently some retarded systems that use ';' as a PATH separator!
+if test "${PATH_SEPARATOR+set}" != set; then
+  PATH_SEPARATOR=:
+  (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 && {
+    (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 ||
+      PATH_SEPARATOR=';'
+  }
+fi
+
+
+
+## ------------------------- ##
+## Locate command utilities. ##
+## ------------------------- ##
+
+
+# func_executable_p FILE
+# ----------------------
+# Check that FILE is an executable regular file.
+func_executable_p ()
+{
+    test -f "$1" && test -x "$1"
+}
+
+
+# func_path_progs PROGS_LIST CHECK_FUNC [PATH]
+# --------------------------------------------
+# Search for either a program that responds to --version with output
+# containing "GNU", or else returned by CHECK_FUNC otherwise, by
+# trying all the directories in PATH with each of the elements of
+# PROGS_LIST.
+#
+# CHECK_FUNC should accept the path to a candidate program, and
+# set $func_check_prog_result if it truncates its output less than
+# $_G_path_prog_max characters.
+func_path_progs ()
+{
+    _G_progs_list=$1
+    _G_check_func=$2
+    _G_PATH=${3-"$PATH"}
+
+    _G_path_prog_max=0
+    _G_path_prog_found=false
+    _G_save_IFS=$IFS; IFS=${PATH_SEPARATOR-:}
+    for _G_dir in $_G_PATH; do
+      IFS=$_G_save_IFS
+      test -z "$_G_dir" && _G_dir=.
+      for _G_prog_name in $_G_progs_list; do
+        for _exeext in '' .EXE; do
+          _G_path_prog=$_G_dir/$_G_prog_name$_exeext
+          func_executable_p "$_G_path_prog" || continue
+          case `"$_G_path_prog" --version 2>&1` in
+            *GNU*) func_path_progs_result=$_G_path_prog _G_path_prog_found=: ;;
+            *)     $_G_check_func $_G_path_prog
+		   func_path_progs_result=$func_check_prog_result
+		   ;;
+          esac
+          $_G_path_prog_found && break 3
+        done
+      done
+    done
+    IFS=$_G_save_IFS
+    test -z "$func_path_progs_result" && {
+      echo "no acceptable sed could be found in \$PATH" >&2
+      exit 1
+    }
+}
+
+
+# We want to be able to use the functions in this file before configure
+# has figured out where the best binaries are kept, which means we have
+# to search for them ourselves - except when the results are already set
+# where we skip the searches.
+
+# Unless the user overrides by setting SED, search the path for either GNU
+# sed, or the sed that truncates its output the least.
+test -z "$SED" && {
+  _G_sed_script=s/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb/
+  for _G_i in 1 2 3 4 5 6 7; do
+    _G_sed_script=$_G_sed_script$nl$_G_sed_script
+  done
+  echo "$_G_sed_script" 2>/dev/null | sed 99q >conftest.sed
+  _G_sed_script=
+
+  func_check_prog_sed ()
+  {
+    _G_path_prog=$1
+
+    _G_count=0
+    printf 0123456789 >conftest.in
+    while :
+    do
+      cat conftest.in conftest.in >conftest.tmp
+      mv conftest.tmp conftest.in
+      cp conftest.in conftest.nl
+      echo '' >> conftest.nl
+      "$_G_path_prog" -f conftest.sed <conftest.nl >conftest.out 2>/dev/null || break
+      diff conftest.out conftest.nl >/dev/null 2>&1 || break
+      _G_count=`expr $_G_count + 1`
+      if test "$_G_count" -gt "$_G_path_prog_max"; then
+        # Best one so far, save it but keep looking for a better one
+        func_check_prog_result=$_G_path_prog
+        _G_path_prog_max=$_G_count
+      fi
+      # 10*(2^10) chars as input seems more than enough
+      test 10 -lt "$_G_count" && break
+    done
+    rm -f conftest.in conftest.tmp conftest.nl conftest.out
+  }
+
+  func_path_progs "sed gsed" func_check_prog_sed $PATH:/usr/xpg4/bin
+  rm -f conftest.sed
+  SED=$func_path_progs_result
+}
+
+
+# Unless the user overrides by setting GREP, search the path for either GNU
+# grep, or the grep that truncates its output the least.
+test -z "$GREP" && {
+  func_check_prog_grep ()
+  {
+    _G_path_prog=$1
+
+    _G_count=0
+    _G_path_prog_max=0
+    printf 0123456789 >conftest.in
+    while :
+    do
+      cat conftest.in conftest.in >conftest.tmp
+      mv conftest.tmp conftest.in
+      cp conftest.in conftest.nl
+      echo 'GREP' >> conftest.nl
+      "$_G_path_prog" -e 'GREP$' -e '-(cannot match)-' <conftest.nl >conftest.out 2>/dev/null || break
+      diff conftest.out conftest.nl >/dev/null 2>&1 || break
+      _G_count=`expr $_G_count + 1`
+      if test "$_G_count" -gt "$_G_path_prog_max"; then
+        # Best one so far, save it but keep looking for a better one
+        func_check_prog_result=$_G_path_prog
+        _G_path_prog_max=$_G_count
+      fi
+      # 10*(2^10) chars as input seems more than enough
+      test 10 -lt "$_G_count" && break
+    done
+    rm -f conftest.in conftest.tmp conftest.nl conftest.out
+  }
+
+  func_path_progs "grep ggrep" func_check_prog_grep $PATH:/usr/xpg4/bin
+  GREP=$func_path_progs_result
+}
+
+
+## ------------------------------- ##
+## User overridable command paths. ##
+## ------------------------------- ##
+
+# All uppercase variable names are used for environment variables.  These
+# variables can be overridden by the user before calling a script that
+# uses them if a suitable command of that name is not already available
+# in the command search PATH.
+
+: ${CP="cp -f"}
+: ${ECHO="printf %s\n"}
+: ${EGREP="$GREP -E"}
+: ${FGREP="$GREP -F"}
+: ${LN_S="ln -s"}
+: ${MAKE="make"}
+: ${MKDIR="mkdir"}
+: ${MV="mv -f"}
+: ${RM="rm -f"}
+: ${SHELL="${CONFIG_SHELL-/bin/sh}"}
+
+
+## -------------------- ##
+## Useful sed snippets. ##
+## -------------------- ##
+
+sed_dirname='s|/[^/]*$||'
+sed_basename='s|^.*/||'
+
+# Sed substitution that helps us do robust quoting.  It backslashifies
+# metacharacters that are still active within double-quoted strings.
+sed_quote_subst='s|\([`"$\\]\)|\\\1|g'
+
+# Same as above, but do not quote variable references.
+sed_double_quote_subst='s/\(["`\\]\)/\\\1/g'
+
+# Sed substitution that turns a string into a regex matching for the
+# string literally.
+sed_make_literal_regex='s|[].[^$\\*\/]|\\&|g'
+
+# Sed substitution that converts a w32 file name or path
+# that contains forward slashes, into one that contains
+# (escaped) backslashes.  A very naive implementation.
+sed_naive_backslashify='s|\\\\*|\\|g;s|/|\\|g;s|\\|\\\\|g'
+
+# Re-'\' parameter expansions in output of sed_double_quote_subst that
+# were '\'-ed in input to the same.  If an odd number of '\' preceded a
+# '$' in input to sed_double_quote_subst, that '$' was protected from
+# expansion.  Since each input '\' is now two '\'s, look for any number
+# of runs of four '\'s followed by two '\'s and then a '$'.  '\' that '$'.
+_G_bs='\\'
+_G_bs2='\\\\'
+_G_bs4='\\\\\\\\'
+_G_dollar='\$'
+sed_double_backslash="\
+  s/$_G_bs4/&\\
+/g
+  s/^$_G_bs2$_G_dollar/$_G_bs&/
+  s/\\([^$_G_bs]\\)$_G_bs2$_G_dollar/\\1$_G_bs2$_G_bs$_G_dollar/g
+  s/\n//g"
+
+
+## ----------------- ##
+## Global variables. ##
+## ----------------- ##
+
+# Except for the global variables explicitly listed below, the following
+# functions in the '^func_' namespace, and the '^require_' namespace
+# variables initialised in the 'Resource management' section, sourcing
+# this file will not pollute your global namespace with anything
+# else. There's no portable way to scope variables in Bourne shell
+# though, so actually running these functions will sometimes place
+# results into a variable named after the function, and often use
+# temporary variables in the '^_G_' namespace. If you are careful to
+# avoid using those namespaces casually in your sourcing script, things
+# should continue to work as you expect. And, of course, you can freely
+# overwrite any of the functions or variables defined here before
+# calling anything to customize them.
+
+EXIT_SUCCESS=0
+EXIT_FAILURE=1
+EXIT_MISMATCH=63  # $? = 63 is used to indicate version mismatch to missing.
+EXIT_SKIP=77	  # $? = 77 is used to indicate a skipped test to automake.
+
+# Allow overriding, eg assuming that you follow the convention of
+# putting '$debug_cmd' at the start of all your functions, you can get
+# bash to show function call trace with:
+#
+#    debug_cmd='eval echo "${FUNCNAME[0]} $*" >&2' bash your-script-name
+debug_cmd=${debug_cmd-":"}
+exit_cmd=:
+
+# By convention, finish your script with:
+#
+#    exit $exit_status
+#
+# so that you can set exit_status to non-zero if you want to indicate
+# something went wrong during execution without actually bailing out at
+# the point of failure.
+exit_status=$EXIT_SUCCESS
+
+# Work around backward compatibility issue on IRIX 6.5. On IRIX 6.4+, sh
+# is ksh but when the shell is invoked as "sh" and the current value of
+# the _XPG environment variable is not equal to 1 (one), the special
+# positional parameter $0, within a function call, is the name of the
+# function.
+progpath=$0
+
+# The name of this program.
+progname=`$ECHO "$progpath" |$SED "$sed_basename"`
+
+# Make sure we have an absolute progpath for reexecution:
+case $progpath in
+  [\\/]*|[A-Za-z]:\\*) ;;
+  *[\\/]*)
+     progdir=`$ECHO "$progpath" |$SED "$sed_dirname"`
+     progdir=`cd "$progdir" && pwd`
+     progpath=$progdir/$progname
+     ;;
+  *)
+     _G_IFS=$IFS
+     IFS=${PATH_SEPARATOR-:}
+     for progdir in $PATH; do
+       IFS=$_G_IFS
+       test -x "$progdir/$progname" && break
+     done
+     IFS=$_G_IFS
+     test -n "$progdir" || progdir=`pwd`
+     progpath=$progdir/$progname
+     ;;
+esac
+
+
+## ----------------- ##
+## Standard options. ##
+## ----------------- ##
+
+# The following options affect the operation of the functions defined
+# below, and should be set appropriately depending on run-time para-
+# meters passed on the command line.
+
+opt_dry_run=false
+opt_quiet=false
+opt_verbose=false
+
+# Categories 'all' and 'none' are always available.  Append any others
+# you will pass as the first argument to func_warning from your own
+# code.
+warning_categories=
+
+# By default, display warnings according to 'opt_warning_types'.  Set
+# 'warning_func'  to ':' to elide all warnings, or func_fatal_error to
+# treat the next displayed warning as a fatal error.
+warning_func=func_warn_and_continue
+
+# Set to 'all' to display all warnings, 'none' to suppress all
+# warnings, or a space delimited list of some subset of
+# 'warning_categories' to display only the listed warnings.
+opt_warning_types=all
+
+
+## -------------------- ##
+## Resource management. ##
+## -------------------- ##
+
+# This section contains definitions for functions that each ensure a
+# particular resource (a file, or a non-empty configuration variable for
+# example) is available, and if appropriate to extract default values
+# from pertinent package files. Call them using their associated
+# 'require_*' variable to ensure that they are executed, at most, once.
+#
+# It's entirely deliberate that calling these functions can set
+# variables that don't obey the namespace limitations obeyed by the rest
+# of this file, in order that that they be as useful as possible to
+# callers.
+
+
+# require_term_colors
+# -------------------
+# Allow display of bold text on terminals that support it.
+require_term_colors=func_require_term_colors
+func_require_term_colors ()
+{
+    $debug_cmd
+
+    test -t 1 && {
+      # COLORTERM and USE_ANSI_COLORS environment variables take
+      # precedence, because most terminfo databases neglect to describe
+      # whether color sequences are supported.
+      test -n "${COLORTERM+set}" && : ${USE_ANSI_COLORS="1"}
+
+      if test 1 = "$USE_ANSI_COLORS"; then
+        # Standard ANSI escape sequences
+        tc_reset=''
+        tc_bold='';   tc_standout=''
+        tc_red='';   tc_green=''
+        tc_blue='';  tc_cyan=''
+      else
+        # Otherwise trust the terminfo database after all.
+        test -n "`tput sgr0 2>/dev/null`" && {
+          tc_reset=`tput sgr0`
+          test -n "`tput bold 2>/dev/null`" && tc_bold=`tput bold`
+          tc_standout=$tc_bold
+          test -n "`tput smso 2>/dev/null`" && tc_standout=`tput smso`
+          test -n "`tput setaf 1 2>/dev/null`" && tc_red=`tput setaf 1`
+          test -n "`tput setaf 2 2>/dev/null`" && tc_green=`tput setaf 2`
+          test -n "`tput setaf 4 2>/dev/null`" && tc_blue=`tput setaf 4`
+          test -n "`tput setaf 5 2>/dev/null`" && tc_cyan=`tput setaf 5`
+        }
+      fi
+    }
+
+    require_term_colors=:
+}
+
+
+## ----------------- ##
+## Function library. ##
+## ----------------- ##
+
+# This section contains a variety of useful functions to call in your
+# scripts. Take note of the portable wrappers for features provided by
+# some modern shells, which will fall back to slower equivalents on
+# less featureful shells.
+
+
+# func_append VAR VALUE
+# ---------------------
+# Append VALUE onto the existing contents of VAR.
+
+  # We should try to minimise forks, especially on Windows where they are
+  # unreasonably slow, so skip the feature probes when bash or zsh are
+  # being used:
+  if test set = "${BASH_VERSION+set}${ZSH_VERSION+set}"; then
+    : ${_G_HAVE_ARITH_OP="yes"}
+    : ${_G_HAVE_XSI_OPS="yes"}
+    # The += operator was introduced in bash 3.1
+    case $BASH_VERSION in
+      [12].* | 3.0 | 3.0*) ;;
+      *)
+        : ${_G_HAVE_PLUSEQ_OP="yes"}
+        ;;
+    esac
+  fi
+
+  # _G_HAVE_PLUSEQ_OP
+  # Can be empty, in which case the shell is probed, "yes" if += is
+  # useable or anything else if it does not work.
+  test -z "$_G_HAVE_PLUSEQ_OP" \
+    && (eval 'x=a; x+=" b"; test "a b" = "$x"') 2>/dev/null \
+    && _G_HAVE_PLUSEQ_OP=yes
+
+if test yes = "$_G_HAVE_PLUSEQ_OP"
+then
+  # This is an XSI compatible shell, allowing a faster implementation...
+  eval 'func_append ()
+  {
+    $debug_cmd
+
+    eval "$1+=\$2"
+  }'
+else
+  # ...otherwise fall back to using expr, which is often a shell builtin.
+  func_append ()
+  {
+    $debug_cmd
+
+    eval "$1=\$$1\$2"
+  }
+fi
+
+
+# func_append_quoted VAR VALUE
+# ----------------------------
+# Quote VALUE and append to the end of shell variable VAR, separated
+# by a space.
+if test yes = "$_G_HAVE_PLUSEQ_OP"; then
+  eval 'func_append_quoted ()
+  {
+    $debug_cmd
+
+    func_quote_for_eval "$2"
+    eval "$1+=\\ \$func_quote_for_eval_result"
+  }'
+else
+  func_append_quoted ()
+  {
+    $debug_cmd
+
+    func_quote_for_eval "$2"
+    eval "$1=\$$1\\ \$func_quote_for_eval_result"
+  }
+fi
+
+
+# func_append_uniq VAR VALUE
+# --------------------------
+# Append unique VALUE onto the existing contents of VAR, assuming
+# entries are delimited by the first character of VALUE.  For example:
+#
+#   func_append_uniq options " --another-option option-argument"
+#
+# will only append to $options if " --another-option option-argument "
+# is not already present somewhere in $options already (note spaces at
+# each end implied by leading space in second argument).
+func_append_uniq ()
+{
+    $debug_cmd
+
+    eval _G_current_value='`$ECHO $'$1'`'
+    _G_delim=`expr "$2" : '\(.\)'`
+
+    case $_G_delim$_G_current_value$_G_delim in
+      *"$2$_G_delim"*) ;;
+      *) func_append "$@" ;;
+    esac
+}
+
+
+# func_arith TERM...
+# ------------------
+# Set func_arith_result to the result of evaluating TERMs.
+  test -z "$_G_HAVE_ARITH_OP" \
+    && (eval 'test 2 = $(( 1 + 1 ))') 2>/dev/null \
+    && _G_HAVE_ARITH_OP=yes
+
+if test yes = "$_G_HAVE_ARITH_OP"; then
+  eval 'func_arith ()
+  {
+    $debug_cmd
+
+    func_arith_result=$(( $* ))
+  }'
+else
+  func_arith ()
+  {
+    $debug_cmd
+
+    func_arith_result=`expr "$@"`
+  }
+fi
+
+
+# func_basename FILE
+# ------------------
+# Set func_basename_result to FILE with everything up to and including
+# the last / stripped.
+if test yes = "$_G_HAVE_XSI_OPS"; then
+  # If this shell supports suffix pattern removal, then use it to avoid
+  # forking. Hide the definitions single quotes in case the shell chokes
+  # on unsupported syntax...
+  _b='func_basename_result=${1##*/}'
+  _d='case $1 in
+        */*) func_dirname_result=${1%/*}$2 ;;
+        *  ) func_dirname_result=$3        ;;
+      esac'
+
+else
+  # ...otherwise fall back to using sed.
+  _b='func_basename_result=`$ECHO "$1" |$SED "$sed_basename"`'
+  _d='func_dirname_result=`$ECHO "$1"  |$SED "$sed_dirname"`
+      if test "X$func_dirname_result" = "X$1"; then
+        func_dirname_result=$3
+      else
+        func_append func_dirname_result "$2"
+      fi'
+fi
+
+eval 'func_basename ()
+{
+    $debug_cmd
+
+    '"$_b"'
+}'
+
+
+# func_dirname FILE APPEND NONDIR_REPLACEMENT
+# -------------------------------------------
+# Compute the dirname of FILE.  If nonempty, add APPEND to the result,
+# otherwise set result to NONDIR_REPLACEMENT.
+eval 'func_dirname ()
+{
+    $debug_cmd
+
+    '"$_d"'
+}'
+
+
+# func_dirname_and_basename FILE APPEND NONDIR_REPLACEMENT
+# --------------------------------------------------------
+# Perform func_basename and func_dirname in a single function
+# call:
+#   dirname:  Compute the dirname of FILE.  If nonempty,
+#             add APPEND to the result, otherwise set result
+#             to NONDIR_REPLACEMENT.
+#             value returned in "$func_dirname_result"
+#   basename: Compute filename of FILE.
+#             value retuned in "$func_basename_result"
+# For efficiency, we do not delegate to the functions above but instead
+# duplicate the functionality here.
+eval 'func_dirname_and_basename ()
+{
+    $debug_cmd
+
+    '"$_b"'
+    '"$_d"'
+}'
+
+
+# func_echo ARG...
+# ----------------
+# Echo program name prefixed message.
+func_echo ()
+{
+    $debug_cmd
+
+    _G_message=$*
+
+    func_echo_IFS=$IFS
+    IFS=$nl
+    for _G_line in $_G_message; do
+      IFS=$func_echo_IFS
+      $ECHO "$progname: $_G_line"
+    done
+    IFS=$func_echo_IFS
+}
+
+
+# func_echo_all ARG...
+# --------------------
+# Invoke $ECHO with all args, space-separated.
+func_echo_all ()
+{
+    $ECHO "$*"
+}
+
+
+# func_echo_infix_1 INFIX ARG...
+# ------------------------------
+# Echo program name, followed by INFIX on the first line, with any
+# additional lines not showing INFIX.
+func_echo_infix_1 ()
+{
+    $debug_cmd
+
+    $require_term_colors
+
+    _G_infix=$1; shift
+    _G_indent=$_G_infix
+    _G_prefix="$progname: $_G_infix: "
+    _G_message=$*
+
+    # Strip color escape sequences before counting printable length
+    for _G_tc in "$tc_reset" "$tc_bold" "$tc_standout" "$tc_red" "$tc_green" "$tc_blue" "$tc_cyan"
+    do
+      test -n "$_G_tc" && {
+        _G_esc_tc=`$ECHO "$_G_tc" | $SED "$sed_make_literal_regex"`
+        _G_indent=`$ECHO "$_G_indent" | $SED "s|$_G_esc_tc||g"`
+      }
+    done
+    _G_indent="$progname: "`echo "$_G_indent" | $SED 's|.| |g'`"  " ## exclude from sc_prohibit_nested_quotes
+
+    func_echo_infix_1_IFS=$IFS
+    IFS=$nl
+    for _G_line in $_G_message; do
+      IFS=$func_echo_infix_1_IFS
+      $ECHO "$_G_prefix$tc_bold$_G_line$tc_reset" >&2
+      _G_prefix=$_G_indent
+    done
+    IFS=$func_echo_infix_1_IFS
+}
+
+
+# func_error ARG...
+# -----------------
+# Echo program name prefixed message to standard error.
+func_error ()
+{
+    $debug_cmd
+
+    $require_term_colors
+
+    func_echo_infix_1 "  $tc_standout${tc_red}error$tc_reset" "$*" >&2
+}
+
+
+# func_fatal_error ARG...
+# -----------------------
+# Echo program name prefixed message to standard error, and exit.
+func_fatal_error ()
+{
+    $debug_cmd
+
+    func_error "$*"
+    exit $EXIT_FAILURE
+}
+
+
+# func_grep EXPRESSION FILENAME
+# -----------------------------
+# Check whether EXPRESSION matches any line of FILENAME, without output.
+func_grep ()
+{
+    $debug_cmd
+
+    $GREP "$1" "$2" >/dev/null 2>&1
+}
+
+
+# func_len STRING
+# ---------------
+# Set func_len_result to the length of STRING. STRING may not
+# start with a hyphen.
+  test -z "$_G_HAVE_XSI_OPS" \
+    && (eval 'x=a/b/c;
+      test 5aa/bb/cc = "${#x}${x%%/*}${x%/*}${x#*/}${x##*/}"') 2>/dev/null \
+    && _G_HAVE_XSI_OPS=yes
+
+if test yes = "$_G_HAVE_XSI_OPS"; then
+  eval 'func_len ()
+  {
+    $debug_cmd
+
+    func_len_result=${#1}
+  }'
+else
+  func_len ()
+  {
+    $debug_cmd
+
+    func_len_result=`expr "$1" : ".*" 2>/dev/null || echo $max_cmd_len`
+  }
+fi
+
+
+# func_mkdir_p DIRECTORY-PATH
+# ---------------------------
+# Make sure the entire path to DIRECTORY-PATH is available.
+func_mkdir_p ()
+{
+    $debug_cmd
+
+    _G_directory_path=$1
+    _G_dir_list=
+
+    if test -n "$_G_directory_path" && test : != "$opt_dry_run"; then
+
+      # Protect directory names starting with '-'
+      case $_G_directory_path in
+        -*) _G_directory_path=./$_G_directory_path ;;
+      esac
+
+      # While some portion of DIR does not yet exist...
+      while test ! -d "$_G_directory_path"; do
+        # ...make a list in topmost first order.  Use a colon delimited
+	# list incase some portion of path contains whitespace.
+        _G_dir_list=$_G_directory_path:$_G_dir_list
+
+        # If the last portion added has no slash in it, the list is done
+        case $_G_directory_path in */*) ;; *) break ;; esac
+
+        # ...otherwise throw away the child directory and loop
+        _G_directory_path=`$ECHO "$_G_directory_path" | $SED -e "$sed_dirname"`
+      done
+      _G_dir_list=`$ECHO "$_G_dir_list" | $SED 's|:*$||'`
+
+      func_mkdir_p_IFS=$IFS; IFS=:
+      for _G_dir in $_G_dir_list; do
+	IFS=$func_mkdir_p_IFS
+        # mkdir can fail with a 'File exist' error if two processes
+        # try to create one of the directories concurrently.  Don't
+        # stop in that case!
+        $MKDIR "$_G_dir" 2>/dev/null || :
+      done
+      IFS=$func_mkdir_p_IFS
+
+      # Bail out if we (or some other process) failed to create a directory.
+      test -d "$_G_directory_path" || \
+        func_fatal_error "Failed to create '$1'"
+    fi
+}
+
+
+# func_mktempdir [BASENAME]
+# -------------------------
+# Make a temporary directory that won't clash with other running
+# libtool processes, and avoids race conditions if possible.  If
+# given, BASENAME is the basename for that directory.
+func_mktempdir ()
+{
+    $debug_cmd
+
+    _G_template=${TMPDIR-/tmp}/${1-$progname}
+
+    if test : = "$opt_dry_run"; then
+      # Return a directory name, but don't create it in dry-run mode
+      _G_tmpdir=$_G_template-$$
+    else
+
+      # If mktemp works, use that first and foremost
+      _G_tmpdir=`mktemp -d "$_G_template-XXXXXXXX" 2>/dev/null`
+
+      if test ! -d "$_G_tmpdir"; then
+        # Failing that, at least try and use $RANDOM to avoid a race
+        _G_tmpdir=$_G_template-${RANDOM-0}$$
+
+        func_mktempdir_umask=`umask`
+        umask 0077
+        $MKDIR "$_G_tmpdir"
+        umask $func_mktempdir_umask
+      fi
+
+      # If we're not in dry-run mode, bomb out on failure
+      test -d "$_G_tmpdir" || \
+        func_fatal_error "cannot create temporary directory '$_G_tmpdir'"
+    fi
+
+    $ECHO "$_G_tmpdir"
+}
+
+
+# func_normal_abspath PATH
+# ------------------------
+# Remove doubled-up and trailing slashes, "." path components,
+# and cancel out any ".." path components in PATH after making
+# it an absolute path.
+func_normal_abspath ()
+{
+    $debug_cmd
+
+    # These SED scripts presuppose an absolute path with a trailing slash.
+    _G_pathcar='s|^/\([^/]*\).*$|\1|'
+    _G_pathcdr='s|^/[^/]*||'
+    _G_removedotparts=':dotsl
+		s|/\./|/|g
+		t dotsl
+		s|/\.$|/|'
+    _G_collapseslashes='s|/\{1,\}|/|g'
+    _G_finalslash='s|/*$|/|'
+
+    # Start from root dir and reassemble the path.
+    func_normal_abspath_result=
+    func_normal_abspath_tpath=$1
+    func_normal_abspath_altnamespace=
+    case $func_normal_abspath_tpath in
+      "")
+        # Empty path, that just means $cwd.
+        func_stripname '' '/' "`pwd`"
+        func_normal_abspath_result=$func_stripname_result
+        return
+        ;;
+      # The next three entries are used to spot a run of precisely
+      # two leading slashes without using negated character classes;
+      # we take advantage of case's first-match behaviour.
+      ///*)
+        # Unusual form of absolute path, do nothing.
+        ;;
+      //*)
+        # Not necessarily an ordinary path; POSIX reserves leading '//'
+        # and for example Cygwin uses it to access remote file shares
+        # over CIFS/SMB, so we conserve a leading double slash if found.
+        func_normal_abspath_altnamespace=/
+        ;;
+      /*)
+        # Absolute path, do nothing.
+        ;;
+      *)
+        # Relative path, prepend $cwd.
+        func_normal_abspath_tpath=`pwd`/$func_normal_abspath_tpath
+        ;;
+    esac
+
+    # Cancel out all the simple stuff to save iterations.  We also want
+    # the path to end with a slash for ease of parsing, so make sure
+    # there is one (and only one) here.
+    func_normal_abspath_tpath=`$ECHO "$func_normal_abspath_tpath" | $SED \
+          -e "$_G_removedotparts" -e "$_G_collapseslashes" -e "$_G_finalslash"`
+    while :; do
+      # Processed it all yet?
+      if test / = "$func_normal_abspath_tpath"; then
+        # If we ascended to the root using ".." the result may be empty now.
+        if test -z "$func_normal_abspath_result"; then
+          func_normal_abspath_result=/
+        fi
+        break
+      fi
+      func_normal_abspath_tcomponent=`$ECHO "$func_normal_abspath_tpath" | $SED \
+          -e "$_G_pathcar"`
+      func_normal_abspath_tpath=`$ECHO "$func_normal_abspath_tpath" | $SED \
+          -e "$_G_pathcdr"`
+      # Figure out what to do with it
+      case $func_normal_abspath_tcomponent in
+        "")
+          # Trailing empty path component, ignore it.
+          ;;
+        ..)
+          # Parent dir; strip last assembled component from result.
+          func_dirname "$func_normal_abspath_result"
+          func_normal_abspath_result=$func_dirname_result
+          ;;
+        *)
+          # Actual path component, append it.
+          func_append func_normal_abspath_result "/$func_normal_abspath_tcomponent"
+          ;;
+      esac
+    done
+    # Restore leading double-slash if one was found on entry.
+    func_normal_abspath_result=$func_normal_abspath_altnamespace$func_normal_abspath_result
+}
+
+
+# func_notquiet ARG...
+# --------------------
+# Echo program name prefixed message only when not in quiet mode.
+func_notquiet ()
+{
+    $debug_cmd
+
+    $opt_quiet || func_echo ${1+"$@"}
+
+    # A bug in bash halts the script if the last line of a function
+    # fails when set -e is in force, so we need another command to
+    # work around that:
+    :
+}
+
+
+# func_relative_path SRCDIR DSTDIR
+# --------------------------------
+# Set func_relative_path_result to the relative path from SRCDIR to DSTDIR.
+func_relative_path ()
+{
+    $debug_cmd
+
+    func_relative_path_result=
+    func_normal_abspath "$1"
+    func_relative_path_tlibdir=$func_normal_abspath_result
+    func_normal_abspath "$2"
+    func_relative_path_tbindir=$func_normal_abspath_result
+
+    # Ascend the tree starting from libdir
+    while :; do
+      # check if we have found a prefix of bindir
+      case $func_relative_path_tbindir in
+        $func_relative_path_tlibdir)
+          # found an exact match
+          func_relative_path_tcancelled=
+          break
+          ;;
+        $func_relative_path_tlibdir*)
+          # found a matching prefix
+          func_stripname "$func_relative_path_tlibdir" '' "$func_relative_path_tbindir"
+          func_relative_path_tcancelled=$func_stripname_result
+          if test -z "$func_relative_path_result"; then
+            func_relative_path_result=.
+          fi
+          break
+          ;;
+        *)
+          func_dirname $func_relative_path_tlibdir
+          func_relative_path_tlibdir=$func_dirname_result
+          if test -z "$func_relative_path_tlibdir"; then
+            # Have to descend all the way to the root!
+            func_relative_path_result=../$func_relative_path_result
+            func_relative_path_tcancelled=$func_relative_path_tbindir
+            break
+          fi
+          func_relative_path_result=../$func_relative_path_result
+          ;;
+      esac
+    done
+
+    # Now calculate path; take care to avoid doubling-up slashes.
+    func_stripname '' '/' "$func_relative_path_result"
+    func_relative_path_result=$func_stripname_result
+    func_stripname '/' '/' "$func_relative_path_tcancelled"
+    if test -n "$func_stripname_result"; then
+      func_append func_relative_path_result "/$func_stripname_result"
+    fi
+
+    # Normalisation. If bindir is libdir, return '.' else relative path.
+    if test -n "$func_relative_path_result"; then
+      func_stripname './' '' "$func_relative_path_result"
+      func_relative_path_result=$func_stripname_result
+    fi
+
+    test -n "$func_relative_path_result" || func_relative_path_result=.
+
+    :
+}
+
+
+# func_quote_for_eval ARG...
+# --------------------------
+# Aesthetically quote ARGs to be evaled later.
+# This function returns two values:
+#   i) func_quote_for_eval_result
+#      double-quoted, suitable for a subsequent eval
+#  ii) func_quote_for_eval_unquoted_result
+#      has all characters that are still active within double
+#      quotes backslashified.
+func_quote_for_eval ()
+{
+    $debug_cmd
+
+    func_quote_for_eval_unquoted_result=
+    func_quote_for_eval_result=
+    while test 0 -lt $#; do
+      case $1 in
+        *[\\\`\"\$]*)
+	  _G_unquoted_arg=`printf '%s\n' "$1" |$SED "$sed_quote_subst"` ;;
+        *)
+          _G_unquoted_arg=$1 ;;
+      esac
+      if test -n "$func_quote_for_eval_unquoted_result"; then
+	func_append func_quote_for_eval_unquoted_result " $_G_unquoted_arg"
+      else
+        func_append func_quote_for_eval_unquoted_result "$_G_unquoted_arg"
+      fi
+
+      case $_G_unquoted_arg in
+        # Double-quote args containing shell metacharacters to delay
+        # word splitting, command substitution and variable expansion
+        # for a subsequent eval.
+        # Many Bourne shells cannot handle close brackets correctly
+        # in scan sets, so we specify it separately.
+        *[\[\~\#\^\&\*\(\)\{\}\|\;\<\>\?\'\ \	]*|*]*|"")
+          _G_quoted_arg=\"$_G_unquoted_arg\"
+          ;;
+        *)
+          _G_quoted_arg=$_G_unquoted_arg
+	  ;;
+      esac
+
+      if test -n "$func_quote_for_eval_result"; then
+	func_append func_quote_for_eval_result " $_G_quoted_arg"
+      else
+        func_append func_quote_for_eval_result "$_G_quoted_arg"
+      fi
+      shift
+    done
+}
+
+
+# func_quote_for_expand ARG
+# -------------------------
+# Aesthetically quote ARG to be evaled later; same as above,
+# but do not quote variable references.
+func_quote_for_expand ()
+{
+    $debug_cmd
+
+    case $1 in
+      *[\\\`\"]*)
+	_G_arg=`$ECHO "$1" | $SED \
+	    -e "$sed_double_quote_subst" -e "$sed_double_backslash"` ;;
+      *)
+        _G_arg=$1 ;;
+    esac
+
+    case $_G_arg in
+      # Double-quote args containing shell metacharacters to delay
+      # word splitting and command substitution for a subsequent eval.
+      # Many Bourne shells cannot handle close brackets correctly
+      # in scan sets, so we specify it separately.
+      *[\[\~\#\^\&\*\(\)\{\}\|\;\<\>\?\'\ \	]*|*]*|"")
+        _G_arg=\"$_G_arg\"
+        ;;
+    esac
+
+    func_quote_for_expand_result=$_G_arg
+}
+
+
+# func_stripname PREFIX SUFFIX NAME
+# ---------------------------------
+# strip PREFIX and SUFFIX from NAME, and store in func_stripname_result.
+# PREFIX and SUFFIX must not contain globbing or regex special
+# characters, hashes, percent signs, but SUFFIX may contain a leading
+# dot (in which case that matches only a dot).
+if test yes = "$_G_HAVE_XSI_OPS"; then
+  eval 'func_stripname ()
+  {
+    $debug_cmd
+
+    # pdksh 5.2.14 does not do ${X%$Y} correctly if both X and Y are
+    # positional parameters, so assign one to ordinary variable first.
+    func_stripname_result=$3
+    func_stripname_result=${func_stripname_result#"$1"}
+    func_stripname_result=${func_stripname_result%"$2"}
+  }'
+else
+  func_stripname ()
+  {
+    $debug_cmd
+
+    case $2 in
+      .*) func_stripname_result=`$ECHO "$3" | $SED -e "s%^$1%%" -e "s%\\\\$2\$%%"`;;
+      *)  func_stripname_result=`$ECHO "$3" | $SED -e "s%^$1%%" -e "s%$2\$%%"`;;
+    esac
+  }
+fi
+
+
+# func_show_eval CMD [FAIL_EXP]
+# -----------------------------
+# Unless opt_quiet is true, then output CMD.  Then, if opt_dryrun is
+# not true, evaluate CMD.  If the evaluation of CMD fails, and FAIL_EXP
+# is given, then evaluate it.
+func_show_eval ()
+{
+    $debug_cmd
+
+    _G_cmd=$1
+    _G_fail_exp=${2-':'}
+
+    func_quote_for_expand "$_G_cmd"
+    eval "func_notquiet $func_quote_for_expand_result"
+
+    $opt_dry_run || {
+      eval "$_G_cmd"
+      _G_status=$?
+      if test 0 -ne "$_G_status"; then
+	eval "(exit $_G_status); $_G_fail_exp"
+      fi
+    }
+}
+
+
+# func_show_eval_locale CMD [FAIL_EXP]
+# ------------------------------------
+# Unless opt_quiet is true, then output CMD.  Then, if opt_dryrun is
+# not true, evaluate CMD.  If the evaluation of CMD fails, and FAIL_EXP
+# is given, then evaluate it.  Use the saved locale for evaluation.
+func_show_eval_locale ()
+{
+    $debug_cmd
+
+    _G_cmd=$1
+    _G_fail_exp=${2-':'}
+
+    $opt_quiet || {
+      func_quote_for_expand "$_G_cmd"
+      eval "func_echo $func_quote_for_expand_result"
+    }
+
+    $opt_dry_run || {
+      eval "$_G_user_locale
+	    $_G_cmd"
+      _G_status=$?
+      eval "$_G_safe_locale"
+      if test 0 -ne "$_G_status"; then
+	eval "(exit $_G_status); $_G_fail_exp"
+      fi
+    }
+}
+
+
+# func_tr_sh
+# ----------
+# Turn $1 into a string suitable for a shell variable name.
+# Result is stored in $func_tr_sh_result.  All characters
+# not in the set a-zA-Z0-9_ are replaced with '_'. Further,
+# if $1 begins with a digit, a '_' is prepended as well.
+func_tr_sh ()
+{
+    $debug_cmd
+
+    case $1 in
+    [0-9]* | *[!a-zA-Z0-9_]*)
+      func_tr_sh_result=`$ECHO "$1" | $SED -e 's/^\([0-9]\)/_\1/' -e 's/[^a-zA-Z0-9_]/_/g'`
+      ;;
+    * )
+      func_tr_sh_result=$1
+      ;;
+    esac
+}
+
+
+# func_verbose ARG...
+# -------------------
+# Echo program name prefixed message in verbose mode only.
+func_verbose ()
+{
+    $debug_cmd
+
+    $opt_verbose && func_echo "$*"
+
+    :
+}
+
+
+# func_warn_and_continue ARG...
+# -----------------------------
+# Echo program name prefixed warning message to standard error.
+func_warn_and_continue ()
+{
+    $debug_cmd
+
+    $require_term_colors
+
+    func_echo_infix_1 "${tc_red}warning$tc_reset" "$*" >&2
+}
+
+
+# func_warning CATEGORY ARG...
+# ----------------------------
+# Echo program name prefixed warning message to standard error. Warning
+# messages can be filtered according to CATEGORY, where this function
+# elides messages where CATEGORY is not listed in the global variable
+# 'opt_warning_types'.
+func_warning ()
+{
+    $debug_cmd
+
+    # CATEGORY must be in the warning_categories list!
+    case " $warning_categories " in
+      *" $1 "*) ;;
+      *) func_internal_error "invalid warning category '$1'" ;;
+    esac
+
+    _G_category=$1
+    shift
+
+    case " $opt_warning_types " in
+      *" $_G_category "*) $warning_func ${1+"$@"} ;;
+    esac
+}
+
+
+# func_sort_ver VER1 VER2
+# -----------------------
+# 'sort -V' is not generally available.
+# Note this deviates from the version comparison in automake
+# in that it treats 1.5 < 1.5.0, and treats 1.4.4a < 1.4-p3a
+# but this should suffice as we won't be specifying old
+# version formats or redundant trailing .0 in bootstrap.conf.
+# If we did want full compatibility then we should probably
+# use m4_version_compare from autoconf.
+func_sort_ver ()
+{
+    $debug_cmd
+
+    printf '%s\n%s\n' "$1" "$2" \
+      | sort -t. -k 1,1n -k 2,2n -k 3,3n -k 4,4n -k 5,5n -k 6,6n -k 7,7n -k 8,8n -k 9,9n
+}
+
+# func_lt_ver PREV CURR
+# ---------------------
+# Return true if PREV and CURR are in the correct order according to
+# func_sort_ver, otherwise false.  Use it like this:
+#
+#  func_lt_ver "$prev_ver" "$proposed_ver" || func_fatal_error "..."
+func_lt_ver ()
+{
+    $debug_cmd
+
+    test "x$1" = x`func_sort_ver "$1" "$2" | $SED 1q`
+}
+
+
+# Local variables:
+# mode: shell-script
+# sh-indentation: 2
+# eval: (add-hook 'before-save-hook 'time-stamp)
+# time-stamp-pattern: "10/scriptversion=%:y-%02m-%02d.%02H; # UTC"
+# time-stamp-time-zone: "UTC"
+# End:
+#! /bin/sh
+
+# Set a version string for this script.
+scriptversion=2014-01-07.03; # UTC
+
+# A portable, pluggable option parser for Bourne shell.
+# Written by Gary V. Vaughan, 2010
+
+# Copyright (C) 2010-2015 Free Software Foundation, Inc.
+# This is free software; see the source for copying conditions.  There is NO
+# warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# Please report bugs or propose patches to gary@gnu.org.
+
+
+## ------ ##
+## Usage. ##
+## ------ ##
+
+# This file is a library for parsing options in your shell scripts along
+# with assorted other useful supporting features that you can make use
+# of too.
+#
+# For the simplest scripts you might need only:
+#
+#   #!/bin/sh
+#   . relative/path/to/funclib.sh
+#   . relative/path/to/options-parser
+#   scriptversion=1.0
+#   func_options ${1+"$@"}
+#   eval set dummy "$func_options_result"; shift
+#   ...rest of your script...
+#
+# In order for the '--version' option to work, you will need to have a
+# suitably formatted comment like the one at the top of this file
+# starting with '# Written by ' and ending with '# warranty; '.
+#
+# For '-h' and '--help' to work, you will also need a one line
+# description of your script's purpose in a comment directly above the
+# '# Written by ' line, like the one at the top of this file.
+#
+# The default options also support '--debug', which will turn on shell
+# execution tracing (see the comment above debug_cmd below for another
+# use), and '--verbose' and the func_verbose function to allow your script
+# to display verbose messages only when your user has specified
+# '--verbose'.
+#
+# After sourcing this file, you can plug processing for additional
+# options by amending the variables from the 'Configuration' section
+# below, and following the instructions in the 'Option parsing'
+# section further down.
+
+## -------------- ##
+## Configuration. ##
+## -------------- ##
+
+# You should override these variables in your script after sourcing this
+# file so that they reflect the customisations you have added to the
+# option parser.
+
+# The usage line for option parsing errors and the start of '-h' and
+# '--help' output messages. You can embed shell variables for delayed
+# expansion at the time the message is displayed, but you will need to
+# quote other shell meta-characters carefully to prevent them being
+# expanded when the contents are evaled.
+usage='$progpath [OPTION]...'
+
+# Short help message in response to '-h' and '--help'.  Add to this or
+# override it after sourcing this library to reflect the full set of
+# options your script accepts.
+usage_message="\
+       --debug        enable verbose shell tracing
+   -W, --warnings=CATEGORY
+                      report the warnings falling in CATEGORY [all]
+   -v, --verbose      verbosely report processing
+       --version      print version information and exit
+   -h, --help         print short or long help message and exit
+"
+
+# Additional text appended to 'usage_message' in response to '--help'.
+long_help_message="
+Warning categories include:
+       'all'          show all warnings
+       'none'         turn off all the warnings
+       'error'        warnings are treated as fatal errors"
+
+# Help message printed before fatal option parsing errors.
+fatal_help="Try '\$progname --help' for more information."
+
+
+
+## ------------------------- ##
+## Hook function management. ##
+## ------------------------- ##
+
+# This section contains functions for adding, removing, and running hooks
+# to the main code.  A hook is just a named list of of function, that can
+# be run in order later on.
+
+# func_hookable FUNC_NAME
+# -----------------------
+# Declare that FUNC_NAME will run hooks added with
+# 'func_add_hook FUNC_NAME ...'.
+func_hookable ()
+{
+    $debug_cmd
+
+    func_append hookable_fns " $1"
+}
+
+
+# func_add_hook FUNC_NAME HOOK_FUNC
+# ---------------------------------
+# Request that FUNC_NAME call HOOK_FUNC before it returns.  FUNC_NAME must
+# first have been declared "hookable" by a call to 'func_hookable'.
+func_add_hook ()
+{
+    $debug_cmd
+
+    case " $hookable_fns " in
+      *" $1 "*) ;;
+      *) func_fatal_error "'$1' does not accept hook functions." ;;
+    esac
+
+    eval func_append ${1}_hooks '" $2"'
+}
+
+
+# func_remove_hook FUNC_NAME HOOK_FUNC
+# ------------------------------------
+# Remove HOOK_FUNC from the list of functions called by FUNC_NAME.
+func_remove_hook ()
+{
+    $debug_cmd
+
+    eval ${1}_hooks='`$ECHO "\$'$1'_hooks" |$SED "s| '$2'||"`'
+}
+
+
+# func_run_hooks FUNC_NAME [ARG]...
+# ---------------------------------
+# Run all hook functions registered to FUNC_NAME.
+# It is assumed that the list of hook functions contains nothing more
+# than a whitespace-delimited list of legal shell function names, and
+# no effort is wasted trying to catch shell meta-characters or preserve
+# whitespace.
+func_run_hooks ()
+{
+    $debug_cmd
+
+    case " $hookable_fns " in
+      *" $1 "*) ;;
+      *) func_fatal_error "'$1' does not support hook funcions.n" ;;
+    esac
+
+    eval _G_hook_fns=\$$1_hooks; shift
+
+    for _G_hook in $_G_hook_fns; do
+      eval $_G_hook '"$@"'
+
+      # store returned options list back into positional
+      # parameters for next 'cmd' execution.
+      eval _G_hook_result=\$${_G_hook}_result
+      eval set dummy "$_G_hook_result"; shift
+    done
+
+    func_quote_for_eval ${1+"$@"}
+    func_run_hooks_result=$func_quote_for_eval_result
+}
+
+
+
+## --------------- ##
+## Option parsing. ##
+## --------------- ##
+
+# In order to add your own option parsing hooks, you must accept the
+# full positional parameter list in your hook function, remove any
+# options that you action, and then pass back the remaining unprocessed
+# options in '<hooked_function_name>_result', escaped suitably for
+# 'eval'.  Like this:
+#
+#    my_options_prep ()
+#    {
+#        $debug_cmd
+#
+#        # Extend the existing usage message.
+#        usage_message=$usage_message'
+#      -s, --silent       don'\''t print informational messages
+#    '
+#
+#        func_quote_for_eval ${1+"$@"}
+#        my_options_prep_result=$func_quote_for_eval_result
+#    }
+#    func_add_hook func_options_prep my_options_prep
+#
+#
+#    my_silent_option ()
+#    {
+#        $debug_cmd
+#
+#        # Note that for efficiency, we parse as many options as we can
+#        # recognise in a loop before passing the remainder back to the
+#        # caller on the first unrecognised argument we encounter.
+#        while test $# -gt 0; do
+#          opt=$1; shift
+#          case $opt in
+#            --silent|-s) opt_silent=: ;;
+#            # Separate non-argument short options:
+#            -s*)         func_split_short_opt "$_G_opt"
+#                         set dummy "$func_split_short_opt_name" \
+#                             "-$func_split_short_opt_arg" ${1+"$@"}
+#                         shift
+#                         ;;
+#            *)            set dummy "$_G_opt" "$*"; shift; break ;;
+#          esac
+#        done
+#
+#        func_quote_for_eval ${1+"$@"}
+#        my_silent_option_result=$func_quote_for_eval_result
+#    }
+#    func_add_hook func_parse_options my_silent_option
+#
+#
+#    my_option_validation ()
+#    {
+#        $debug_cmd
+#
+#        $opt_silent && $opt_verbose && func_fatal_help "\
+#    '--silent' and '--verbose' options are mutually exclusive."
+#
+#        func_quote_for_eval ${1+"$@"}
+#        my_option_validation_result=$func_quote_for_eval_result
+#    }
+#    func_add_hook func_validate_options my_option_validation
+#
+# You'll alse need to manually amend $usage_message to reflect the extra
+# options you parse.  It's preferable to append if you can, so that
+# multiple option parsing hooks can be added safely.
+
+
+# func_options [ARG]...
+# ---------------------
+# All the functions called inside func_options are hookable. See the
+# individual implementations for details.
+func_hookable func_options
+func_options ()
+{
+    $debug_cmd
+
+    func_options_prep ${1+"$@"}
+    eval func_parse_options \
+        ${func_options_prep_result+"$func_options_prep_result"}
+    eval func_validate_options \
+        ${func_parse_options_result+"$func_parse_options_result"}
+
+    eval func_run_hooks func_options \
+        ${func_validate_options_result+"$func_validate_options_result"}
+
+    # save modified positional parameters for caller
+    func_options_result=$func_run_hooks_result
+}
+
+
+# func_options_prep [ARG]...
+# --------------------------
+# All initialisations required before starting the option parse loop.
+# Note that when calling hook functions, we pass through the list of
+# positional parameters.  If a hook function modifies that list, and
+# needs to propogate that back to rest of this script, then the complete
+# modified list must be put in 'func_run_hooks_result' before
+# returning.
+func_hookable func_options_prep
+func_options_prep ()
+{
+    $debug_cmd
+
+    # Option defaults:
+    opt_verbose=false
+    opt_warning_types=
+
+    func_run_hooks func_options_prep ${1+"$@"}
+
+    # save modified positional parameters for caller
+    func_options_prep_result=$func_run_hooks_result
+}
+
+
+# func_parse_options [ARG]...
+# ---------------------------
+# The main option parsing loop.
+func_hookable func_parse_options
+func_parse_options ()
+{
+    $debug_cmd
+
+    func_parse_options_result=
+
+    # this just eases exit handling
+    while test $# -gt 0; do
+      # Defer to hook functions for initial option parsing, so they
+      # get priority in the event of reusing an option name.
+      func_run_hooks func_parse_options ${1+"$@"}
+
+      # Adjust func_parse_options positional parameters to match
+      eval set dummy "$func_run_hooks_result"; shift
+
+      # Break out of the loop if we already parsed every option.
+      test $# -gt 0 || break
+
+      _G_opt=$1
+      shift
+      case $_G_opt in
+        --debug|-x)   debug_cmd='set -x'
+                      func_echo "enabling shell trace mode"
+                      $debug_cmd
+                      ;;
+
+        --no-warnings|--no-warning|--no-warn)
+                      set dummy --warnings none ${1+"$@"}
+                      shift
+		      ;;
+
+        --warnings|--warning|-W)
+                      test $# = 0 && func_missing_arg $_G_opt && break
+                      case " $warning_categories $1" in
+                        *" $1 "*)
+                          # trailing space prevents matching last $1 above
+                          func_append_uniq opt_warning_types " $1"
+                          ;;
+                        *all)
+                          opt_warning_types=$warning_categories
+                          ;;
+                        *none)
+                          opt_warning_types=none
+                          warning_func=:
+                          ;;
+                        *error)
+                          opt_warning_types=$warning_categories
+                          warning_func=func_fatal_error
+                          ;;
+                        *)
+                          func_fatal_error \
+                             "unsupported warning category: '$1'"
+                          ;;
+                      esac
+                      shift
+                      ;;
+
+        --verbose|-v) opt_verbose=: ;;
+        --version)    func_version ;;
+        -\?|-h)       func_usage ;;
+        --help)       func_help ;;
+
+	# Separate optargs to long options (plugins may need this):
+	--*=*)        func_split_equals "$_G_opt"
+	              set dummy "$func_split_equals_lhs" \
+                          "$func_split_equals_rhs" ${1+"$@"}
+                      shift
+                      ;;
+
+       # Separate optargs to short options:
+        -W*)
+                      func_split_short_opt "$_G_opt"
+                      set dummy "$func_split_short_opt_name" \
+                          "$func_split_short_opt_arg" ${1+"$@"}
+                      shift
+                      ;;
+
+        # Separate non-argument short options:
+        -\?*|-h*|-v*|-x*)
+                      func_split_short_opt "$_G_opt"
+                      set dummy "$func_split_short_opt_name" \
+                          "-$func_split_short_opt_arg" ${1+"$@"}
+                      shift
+                      ;;
+
+        --)           break ;;
+        -*)           func_fatal_help "unrecognised option: '$_G_opt'" ;;
+        *)            set dummy "$_G_opt" ${1+"$@"}; shift; break ;;
+      esac
+    done
+
+    # save modified positional parameters for caller
+    func_quote_for_eval ${1+"$@"}
+    func_parse_options_result=$func_quote_for_eval_result
+}
+
+
+# func_validate_options [ARG]...
+# ------------------------------
+# Perform any sanity checks on option settings and/or unconsumed
+# arguments.
+func_hookable func_validate_options
+func_validate_options ()
+{
+    $debug_cmd
+
+    # Display all warnings if -W was not given.
+    test -n "$opt_warning_types" || opt_warning_types=" $warning_categories"
+
+    func_run_hooks func_validate_options ${1+"$@"}
+
+    # Bail if the options were screwed!
+    $exit_cmd $EXIT_FAILURE
+
+    # save modified positional parameters for caller
+    func_validate_options_result=$func_run_hooks_result
+}
+
+
+
+## ----------------- ##
+## Helper functions. ##
+## ----------------- ##
+
+# This section contains the helper functions used by the rest of the
+# hookable option parser framework in ascii-betical order.
+
+
+# func_fatal_help ARG...
+# ----------------------
+# Echo program name prefixed message to standard error, followed by
+# a help hint, and exit.
+func_fatal_help ()
+{
+    $debug_cmd
+
+    eval \$ECHO \""Usage: $usage"\"
+    eval \$ECHO \""$fatal_help"\"
+    func_error ${1+"$@"}
+    exit $EXIT_FAILURE
+}
+
+
+# func_help
+# ---------
+# Echo long help message to standard output and exit.
+func_help ()
+{
+    $debug_cmd
+
+    func_usage_message
+    $ECHO "$long_help_message"
+    exit 0
+}
+
+
+# func_missing_arg ARGNAME
+# ------------------------
+# Echo program name prefixed message to standard error and set global
+# exit_cmd.
+func_missing_arg ()
+{
+    $debug_cmd
+
+    func_error "Missing argument for '$1'."
+    exit_cmd=exit
+}
+
+
+# func_split_equals STRING
+# ------------------------
+# Set func_split_equals_lhs and func_split_equals_rhs shell variables after
+# splitting STRING at the '=' sign.
+test -z "$_G_HAVE_XSI_OPS" \
+    && (eval 'x=a/b/c;
+      test 5aa/bb/cc = "${#x}${x%%/*}${x%/*}${x#*/}${x##*/}"') 2>/dev/null \
+    && _G_HAVE_XSI_OPS=yes
+
+if test yes = "$_G_HAVE_XSI_OPS"
+then
+  # This is an XSI compatible shell, allowing a faster implementation...
+  eval 'func_split_equals ()
+  {
+      $debug_cmd
+
+      func_split_equals_lhs=${1%%=*}
+      func_split_equals_rhs=${1#*=}
+      test "x$func_split_equals_lhs" = "x$1" \
+        && func_split_equals_rhs=
+  }'
+else
+  # ...otherwise fall back to using expr, which is often a shell builtin.
+  func_split_equals ()
+  {
+      $debug_cmd
+
+      func_split_equals_lhs=`expr "x$1" : 'x\([^=]*\)'`
+      func_split_equals_rhs=
+      test "x$func_split_equals_lhs" = "x$1" \
+        || func_split_equals_rhs=`expr "x$1" : 'x[^=]*=\(.*\)$'`
+  }
+fi #func_split_equals
+
+
+# func_split_short_opt SHORTOPT
+# -----------------------------
+# Set func_split_short_opt_name and func_split_short_opt_arg shell
+# variables after splitting SHORTOPT after the 2nd character.
+if test yes = "$_G_HAVE_XSI_OPS"
+then
+  # This is an XSI compatible shell, allowing a faster implementation...
+  eval 'func_split_short_opt ()
+  {
+      $debug_cmd
+
+      func_split_short_opt_arg=${1#??}
+      func_split_short_opt_name=${1%"$func_split_short_opt_arg"}
+  }'
+else
+  # ...otherwise fall back to using expr, which is often a shell builtin.
+  func_split_short_opt ()
+  {
+      $debug_cmd
+
+      func_split_short_opt_name=`expr "x$1" : 'x-\(.\)'`
+      func_split_short_opt_arg=`expr "x$1" : 'x-.\(.*\)$'`
+  }
+fi #func_split_short_opt
+
+
+# func_usage
+# ----------
+# Echo short help message to standard output and exit.
+func_usage ()
+{
+    $debug_cmd
+
+    func_usage_message
+    $ECHO "Run '$progname --help |${PAGER-more}' for full usage"
+    exit 0
+}
+
+
+# func_usage_message
+# ------------------
+# Echo short help message to standard output.
+func_usage_message ()
+{
+    $debug_cmd
+
+    eval \$ECHO \""Usage: $usage"\"
+    echo
+    $SED -n 's|^# ||
+        /^Written by/{
+          x;p;x
+        }
+	h
+	/^Written by/q' < "$progpath"
+    echo
+    eval \$ECHO \""$usage_message"\"
+}
+
+
+# func_version
+# ------------
+# Echo version message to standard output and exit.
+func_version ()
+{
+    $debug_cmd
+
+    printf '%s\n' "$progname $scriptversion"
+    $SED -n '
+        /(C)/!b go
+        :more
+        /\./!{
+          N
+          s|\n# | |
+          b more
+        }
+        :go
+        /^# Written by /,/# warranty; / {
+          s|^# ||
+          s|^# *$||
+          s|\((C)\)[ 0-9,-]*[ ,-]\([1-9][0-9]* \)|\1 \2|
+          p
+        }
+        /^# Written by / {
+          s|^# ||
+          p
+        }
+        /^warranty; /q' < "$progpath"
+
+    exit $?
+}
+
+
+# Local variables:
+# mode: shell-script
+# sh-indentation: 2
+# eval: (add-hook 'before-save-hook 'time-stamp)
+# time-stamp-pattern: "10/scriptversion=%:y-%02m-%02d.%02H; # UTC"
+# time-stamp-time-zone: "UTC"
+# End:
+
+# Set a version string.
+scriptversion='(GNU libtool) 2.4.6'
+
+
+# func_echo ARG...
+# ----------------
+# Libtool also displays the current mode in messages, so override
+# funclib.sh func_echo with this custom definition.
+func_echo ()
+{
+    $debug_cmd
+
+    _G_message=$*
+
+    func_echo_IFS=$IFS
+    IFS=$nl
+    for _G_line in $_G_message; do
+      IFS=$func_echo_IFS
+      $ECHO "$progname${opt_mode+: $opt_mode}: $_G_line"
+    done
+    IFS=$func_echo_IFS
+}
+
+
+# func_warning ARG...
+# -------------------
+# Libtool warnings are not categorized, so override funclib.sh
+# func_warning with this simpler definition.
+func_warning ()
+{
+    $debug_cmd
+
+    $warning_func ${1+"$@"}
+}
+
+
+## ---------------- ##
+## Options parsing. ##
+## ---------------- ##
+
+# Hook in the functions to make sure our own options are parsed during
+# the option parsing loop.
+
+usage='$progpath [OPTION]... [MODE-ARG]...'
+
+# Short help message in response to '-h'.
+usage_message="Options:
+       --config             show all configuration variables
+       --debug              enable verbose shell tracing
+   -n, --dry-run            display commands without modifying any files
+       --features           display basic configuration information and exit
+       --mode=MODE          use operation mode MODE
+       --no-warnings        equivalent to '-Wnone'
+       --preserve-dup-deps  don't remove duplicate dependency libraries
+       --quiet, --silent    don't print informational messages
+       --tag=TAG            use configuration variables from tag TAG
+   -v, --verbose            print more informational messages than default
+       --version            print version information
+   -W, --warnings=CATEGORY  report the warnings falling in CATEGORY [all]
+   -h, --help, --help-all   print short, long, or detailed help message
+"
+
+# Additional text appended to 'usage_message' in response to '--help'.
+func_help ()
+{
+    $debug_cmd
+
+    func_usage_message
+    $ECHO "$long_help_message
+
+MODE must be one of the following:
+
+       clean           remove files from the build directory
+       compile         compile a source file into a libtool object
+       execute         automatically set library path, then run a program
+       finish          complete the installation of libtool libraries
+       install         install libraries or executables
+       link            create a library or an executable
+       uninstall       remove libraries from an installed directory
+
+MODE-ARGS vary depending on the MODE.  When passed as first option,
+'--mode=MODE' may be abbreviated as 'MODE' or a unique abbreviation of that.
+Try '$progname --help --mode=MODE' for a more detailed description of MODE.
+
+When reporting a bug, please describe a test case to reproduce it and
+include the following information:
+
+       host-triplet:   $host
+       shell:          $SHELL
+       compiler:       $LTCC
+       compiler flags: $LTCFLAGS
+       linker:         $LD (gnu? $with_gnu_ld)
+       version:        $progname $scriptversion Debian-2.4.6-2
+       automake:       `($AUTOMAKE --version) 2>/dev/null |$SED 1q`
+       autoconf:       `($AUTOCONF --version) 2>/dev/null |$SED 1q`
+
+Report bugs to <bug-libtool@gnu.org>.
+GNU libtool home page: <http://www.gnu.org/s/libtool/>.
+General help using GNU software: <http://www.gnu.org/gethelp/>."
+    exit 0
+}
+
+
+# func_lo2o OBJECT-NAME
+# ---------------------
+# Transform OBJECT-NAME from a '.lo' suffix to the platform specific
+# object suffix.
+
+lo2o=s/\\.lo\$/.$objext/
+o2lo=s/\\.$objext\$/.lo/
+
+if test yes = "$_G_HAVE_XSI_OPS"; then
+  eval 'func_lo2o ()
+  {
+    case $1 in
+      *.lo) func_lo2o_result=${1%.lo}.$objext ;;
+      *   ) func_lo2o_result=$1               ;;
+    esac
+  }'
+
+  # func_xform LIBOBJ-OR-SOURCE
+  # ---------------------------
+  # Transform LIBOBJ-OR-SOURCE from a '.o' or '.c' (or otherwise)
+  # suffix to a '.lo' libtool-object suffix.
+  eval 'func_xform ()
+  {
+    func_xform_result=${1%.*}.lo
+  }'
+else
+  # ...otherwise fall back to using sed.
+  func_lo2o ()
+  {
+    func_lo2o_result=`$ECHO "$1" | $SED "$lo2o"`
+  }
+
+  func_xform ()
+  {
+    func_xform_result=`$ECHO "$1" | $SED 's|\.[^.]*$|.lo|'`
+  }
+fi
+
+
+# func_fatal_configuration ARG...
+# -------------------------------
+# Echo program name prefixed message to standard error, followed by
+# a configuration failure hint, and exit.
+func_fatal_configuration ()
+{
+    func__fatal_error ${1+"$@"} \
+      "See the $PACKAGE documentation for more information." \
+      "Fatal configuration error."
+}
+
+
+# func_config
+# -----------
+# Display the configuration for all the tags in this script.
+func_config ()
+{
+    re_begincf='^# ### BEGIN LIBTOOL'
+    re_endcf='^# ### END LIBTOOL'
+
+    # Default configuration.
+    $SED "1,/$re_begincf CONFIG/d;/$re_endcf CONFIG/,\$d" < "$progpath"
+
+    # Now print the configurations for the tags.
+    for tagname in $taglist; do
+      $SED -n "/$re_begincf TAG CONFIG: $tagname\$/,/$re_endcf TAG CONFIG: $tagname\$/p" < "$progpath"
+    done
+
+    exit $?
+}
+
+
+# func_features
+# -------------
+# Display the features supported by this script.
+func_features ()
+{
+    echo "host: $host"
+    if test yes = "$build_libtool_libs"; then
+      echo "enable shared libraries"
+    else
+      echo "disable shared libraries"
+    fi
+    if test yes = "$build_old_libs"; then
+      echo "enable static libraries"
+    else
+      echo "disable static libraries"
+    fi
+
+    exit $?
+}
+
+
+# func_enable_tag TAGNAME
+# -----------------------
+# Verify that TAGNAME is valid, and either flag an error and exit, or
+# enable the TAGNAME tag.  We also add TAGNAME to the global $taglist
+# variable here.
+func_enable_tag ()
+{
+    # Global variable:
+    tagname=$1
+
+    re_begincf="^# ### BEGIN LIBTOOL TAG CONFIG: $tagname\$"
+    re_endcf="^# ### END LIBTOOL TAG CONFIG: $tagname\$"
+    sed_extractcf=/$re_begincf/,/$re_endcf/p
+
+    # Validate tagname.
+    case $tagname in
+      *[!-_A-Za-z0-9,/]*)
+        func_fatal_error "invalid tag name: $tagname"
+        ;;
+    esac
+
+    # Don't test for the "default" C tag, as we know it's
+    # there but not specially marked.
+    case $tagname in
+        CC) ;;
+    *)
+        if $GREP "$re_begincf" "$progpath" >/dev/null 2>&1; then
+	  taglist="$taglist $tagname"
+
+	  # Evaluate the configuration.  Be careful to quote the path
+	  # and the sed script, to avoid splitting on whitespace, but
+	  # also don't use non-portable quotes within backquotes within
+	  # quotes we have to do it in 2 steps:
+	  extractedcf=`$SED -n -e "$sed_extractcf" < "$progpath"`
+	  eval "$extractedcf"
+        else
+	  func_error "ignoring unknown tag $tagname"
+        fi
+        ;;
+    esac
+}
+
+
+# func_check_version_match
+# ------------------------
+# Ensure that we are using m4 macros, and libtool script from the same
+# release of libtool.
+func_check_version_match ()
+{
+    if test "$package_revision" != "$macro_revision"; then
+      if test "$VERSION" != "$macro_version"; then
+        if test -z "$macro_version"; then
+          cat >&2 <<_LT_EOF
+$progname: Version mismatch error.  This is $PACKAGE $VERSION, but the
+$progname: definition of this LT_INIT comes from an older release.
+$progname: You should recreate aclocal.m4 with macros from $PACKAGE $VERSION
+$progname: and run autoconf again.
+_LT_EOF
+        else
+          cat >&2 <<_LT_EOF
+$progname: Version mismatch error.  This is $PACKAGE $VERSION, but the
+$progname: definition of this LT_INIT comes from $PACKAGE $macro_version.
+$progname: You should recreate aclocal.m4 with macros from $PACKAGE $VERSION
+$progname: and run autoconf again.
+_LT_EOF
+        fi
+      else
+        cat >&2 <<_LT_EOF
+$progname: Version mismatch error.  This is $PACKAGE $VERSION, revision $package_revision,
+$progname: but the definition of this LT_INIT comes from revision $macro_revision.
+$progname: You should recreate aclocal.m4 with macros from revision $package_revision
+$progname: of $PACKAGE $VERSION and run autoconf again.
+_LT_EOF
+      fi
+
+      exit $EXIT_MISMATCH
+    fi
+}
+
+
+# libtool_options_prep [ARG]...
+# -----------------------------
+# Preparation for options parsed by libtool.
+libtool_options_prep ()
+{
+    $debug_mode
+
+    # Option defaults:
+    opt_config=false
+    opt_dlopen=
+    opt_dry_run=false
+    opt_help=false
+    opt_mode=
+    opt_preserve_dup_deps=false
+    opt_quiet=false
+
+    nonopt=
+    preserve_args=
+
+    # Shorthand for --mode=foo, only valid as the first argument
+    case $1 in
+    clean|clea|cle|cl)
+      shift; set dummy --mode clean ${1+"$@"}; shift
+      ;;
+    compile|compil|compi|comp|com|co|c)
+      shift; set dummy --mode compile ${1+"$@"}; shift
+      ;;
+    execute|execut|execu|exec|exe|ex|e)
+      shift; set dummy --mode execute ${1+"$@"}; shift
+      ;;
+    finish|finis|fini|fin|fi|f)
+      shift; set dummy --mode finish ${1+"$@"}; shift
+      ;;
+    install|instal|insta|inst|ins|in|i)
+      shift; set dummy --mode install ${1+"$@"}; shift
+      ;;
+    link|lin|li|l)
+      shift; set dummy --mode link ${1+"$@"}; shift
+      ;;
+    uninstall|uninstal|uninsta|uninst|unins|unin|uni|un|u)
+      shift; set dummy --mode uninstall ${1+"$@"}; shift
+      ;;
+    esac
+
+    # Pass back the list of options.
+    func_quote_for_eval ${1+"$@"}
+    libtool_options_prep_result=$func_quote_for_eval_result
+}
+func_add_hook func_options_prep libtool_options_prep
+
+
+# libtool_parse_options [ARG]...
+# ---------------------------------
+# Provide handling for libtool specific options.
+libtool_parse_options ()
+{
+    $debug_cmd
+
+    # Perform our own loop to consume as many options as possible in
+    # each iteration.
+    while test $# -gt 0; do
+      _G_opt=$1
+      shift
+      case $_G_opt in
+        --dry-run|--dryrun|-n)
+                        opt_dry_run=:
+                        ;;
+
+        --config)       func_config ;;
+
+        --dlopen|-dlopen)
+                        opt_dlopen="${opt_dlopen+$opt_dlopen
+}$1"
+                        shift
+                        ;;
+
+        --preserve-dup-deps)
+                        opt_preserve_dup_deps=: ;;
+
+        --features)     func_features ;;
+
+        --finish)       set dummy --mode finish ${1+"$@"}; shift ;;
+
+        --help)         opt_help=: ;;
+
+        --help-all)     opt_help=': help-all' ;;
+
+        --mode)         test $# = 0 && func_missing_arg $_G_opt && break
+                        opt_mode=$1
+                        case $1 in
+                          # Valid mode arguments:
+                          clean|compile|execute|finish|install|link|relink|uninstall) ;;
+
+                          # Catch anything else as an error
+                          *) func_error "invalid argument for $_G_opt"
+                             exit_cmd=exit
+                             break
+                             ;;
+                        esac
+                        shift
+                        ;;
+
+        --no-silent|--no-quiet)
+                        opt_quiet=false
+                        func_append preserve_args " $_G_opt"
+                        ;;
+
+        --no-warnings|--no-warning|--no-warn)
+                        opt_warning=false
+                        func_append preserve_args " $_G_opt"
+                        ;;
+
+        --no-verbose)
+                        opt_verbose=false
+                        func_append preserve_args " $_G_opt"
+                        ;;
+
+        --silent|--quiet)
+                        opt_quiet=:
+                        opt_verbose=false
+                        func_append preserve_args " $_G_opt"
+                        ;;
+
+        --tag)          test $# = 0 && func_missing_arg $_G_opt && break
+                        opt_tag=$1
+                        func_append preserve_args " $_G_opt $1"
+                        func_enable_tag "$1"
+                        shift
+                        ;;
+
+        --verbose|-v)   opt_quiet=false
+                        opt_verbose=:
+                        func_append preserve_args " $_G_opt"
+                        ;;
+
+	# An option not handled by this hook function:
+        *)		set dummy "$_G_opt" ${1+"$@"};	shift; break  ;;
+      esac
+    done
+
+
+    # save modified positional parameters for caller
+    func_quote_for_eval ${1+"$@"}
+    libtool_parse_options_result=$func_quote_for_eval_result
+}
+func_add_hook func_parse_options libtool_parse_options
+
+
+
+# libtool_validate_options [ARG]...
+# ---------------------------------
+# Perform any sanity checks on option settings and/or unconsumed
+# arguments.
+libtool_validate_options ()
+{
+    # save first non-option argument
+    if test 0 -lt $#; then
+      nonopt=$1
+      shift
+    fi
+
+    # preserve --debug
+    test : = "$debug_cmd" || func_append preserve_args " --debug"
+
+    case $host in
+      # Solaris2 added to fix http://debbugs.gnu.org/cgi/bugreport.cgi?bug=16452
+      # see also: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59788
+      *cygwin* | *mingw* | *pw32* | *cegcc* | *solaris2* | *os2*)
+        # don't eliminate duplications in $postdeps and $predeps
+        opt_duplicate_compiler_generated_deps=:
+        ;;
+      *)
+        opt_duplicate_compiler_generated_deps=$opt_preserve_dup_deps
+        ;;
+    esac
+
+    $opt_help || {
+      # Sanity checks first:
+      func_check_version_match
+
+      test yes != "$build_libtool_libs" \
+        && test yes != "$build_old_libs" \
+        && func_fatal_configuration "not configured to build any kind of library"
+
+      # Darwin sucks
+      eval std_shrext=\"$shrext_cmds\"
+
+      # Only execute mode is allowed to have -dlopen flags.
+      if test -n "$opt_dlopen" && test execute != "$opt_mode"; then
+        func_error "unrecognized option '-dlopen'"
+        $ECHO "$help" 1>&2
+        exit $EXIT_FAILURE
+      fi
+
+      # Change the help message to a mode-specific one.
+      generic_help=$help
+      help="Try '$progname --help --mode=$opt_mode' for more information."
+    }
+
+    # Pass back the unparsed argument list
+    func_quote_for_eval ${1+"$@"}
+    libtool_validate_options_result=$func_quote_for_eval_result
+}
+func_add_hook func_validate_options libtool_validate_options
+
+
+# Process options as early as possible so that --help and --version
+# can return quickly.
+func_options ${1+"$@"}
+eval set dummy "$func_options_result"; shift
+
+
+
+## ----------- ##
+##    Main.    ##
+## ----------- ##
+
+magic='%%%MAGIC variable%%%'
+magic_exe='%%%MAGIC EXE variable%%%'
+
+# Global variables.
+extracted_archives=
+extracted_serial=0
+
+# If this variable is set in any of the actions, the command in it
+# will be execed at the end.  This prevents here-documents from being
+# left over by shells.
+exec_cmd=
+
+
+# A function that is used when there is no print builtin or printf.
+func_fallback_echo ()
+{
+  eval 'cat <<_LTECHO_EOF
+$1
+_LTECHO_EOF'
+}
+
+# func_generated_by_libtool
+# True iff stdin has been generated by Libtool. This function is only
+# a basic sanity check; it will hardly flush out determined imposters.
+func_generated_by_libtool_p ()
+{
+  $GREP "^# Generated by .*$PACKAGE" > /dev/null 2>&1
+}
+
+# func_lalib_p file
+# True iff FILE is a libtool '.la' library or '.lo' object file.
+# This function is only a basic sanity check; it will hardly flush out
+# determined imposters.
+func_lalib_p ()
+{
+    test -f "$1" &&
+      $SED -e 4q "$1" 2>/dev/null | func_generated_by_libtool_p
+}
+
+# func_lalib_unsafe_p file
+# True iff FILE is a libtool '.la' library or '.lo' object file.
+# This function implements the same check as func_lalib_p without
+# resorting to external programs.  To this end, it redirects stdin and
+# closes it afterwards, without saving the original file descriptor.
+# As a safety measure, use it only where a negative result would be
+# fatal anyway.  Works if 'file' does not exist.
+func_lalib_unsafe_p ()
+{
+    lalib_p=no
+    if test -f "$1" && test -r "$1" && exec 5<&0 <"$1"; then
+	for lalib_p_l in 1 2 3 4
+	do
+	    read lalib_p_line
+	    case $lalib_p_line in
+		\#\ Generated\ by\ *$PACKAGE* ) lalib_p=yes; break;;
+	    esac
+	done
+	exec 0<&5 5<&-
+    fi
+    test yes = "$lalib_p"
+}
+
+# func_ltwrapper_script_p file
+# True iff FILE is a libtool wrapper script
+# This function is only a basic sanity check; it will hardly flush out
+# determined imposters.
+func_ltwrapper_script_p ()
+{
+    test -f "$1" &&
+      $lt_truncate_bin < "$1" 2>/dev/null | func_generated_by_libtool_p
+}
+
+# func_ltwrapper_executable_p file
+# True iff FILE is a libtool wrapper executable
+# This function is only a basic sanity check; it will hardly flush out
+# determined imposters.
+func_ltwrapper_executable_p ()
+{
+    func_ltwrapper_exec_suffix=
+    case $1 in
+    *.exe) ;;
+    *) func_ltwrapper_exec_suffix=.exe ;;
+    esac
+    $GREP "$magic_exe" "$1$func_ltwrapper_exec_suffix" >/dev/null 2>&1
+}
+
+# func_ltwrapper_scriptname file
+# Assumes file is an ltwrapper_executable
+# uses $file to determine the appropriate filename for a
+# temporary ltwrapper_script.
+func_ltwrapper_scriptname ()
+{
+    func_dirname_and_basename "$1" "" "."
+    func_stripname '' '.exe' "$func_basename_result"
+    func_ltwrapper_scriptname_result=$func_dirname_result/$objdir/${func_stripname_result}_ltshwrapper
+}
+
+# func_ltwrapper_p file
+# True iff FILE is a libtool wrapper script or wrapper executable
+# This function is only a basic sanity check; it will hardly flush out
+# determined imposters.
+func_ltwrapper_p ()
+{
+    func_ltwrapper_script_p "$1" || func_ltwrapper_executable_p "$1"
+}
+
+
+# func_execute_cmds commands fail_cmd
+# Execute tilde-delimited COMMANDS.
+# If FAIL_CMD is given, eval that upon failure.
+# FAIL_CMD may read-access the current command in variable CMD!
+func_execute_cmds ()
+{
+    $debug_cmd
+
+    save_ifs=$IFS; IFS='~'
+    for cmd in $1; do
+      IFS=$sp$nl
+      eval cmd=\"$cmd\"
+      IFS=$save_ifs
+      func_show_eval "$cmd" "${2-:}"
+    done
+    IFS=$save_ifs
+}
+
+
+# func_source file
+# Source FILE, adding directory component if necessary.
+# Note that it is not necessary on cygwin/mingw to append a dot to
+# FILE even if both FILE and FILE.exe exist: automatic-append-.exe
+# behavior happens only for exec(3), not for open(2)!  Also, sourcing
+# 'FILE.' does not work on cygwin managed mounts.
+func_source ()
+{
+    $debug_cmd
+
+    case $1 in
+    */* | *\\*)	. "$1" ;;
+    *)		. "./$1" ;;
+    esac
+}
+
+
+# func_resolve_sysroot PATH
+# Replace a leading = in PATH with a sysroot.  Store the result into
+# func_resolve_sysroot_result
+func_resolve_sysroot ()
+{
+  func_resolve_sysroot_result=$1
+  case $func_resolve_sysroot_result in
+  =*)
+    func_stripname '=' '' "$func_resolve_sysroot_result"
+    func_resolve_sysroot_result=$lt_sysroot$func_stripname_result
+    ;;
+  esac
+}
+
+# func_replace_sysroot PATH
+# If PATH begins with the sysroot, replace it with = and
+# store the result into func_replace_sysroot_result.
+func_replace_sysroot ()
+{
+  case $lt_sysroot:$1 in
+  ?*:"$lt_sysroot"*)
+    func_stripname "$lt_sysroot" '' "$1"
+    func_replace_sysroot_result='='$func_stripname_result
+    ;;
+  *)
+    # Including no sysroot.
+    func_replace_sysroot_result=$1
+    ;;
+  esac
+}
+
+# func_infer_tag arg
+# Infer tagged configuration to use if any are available and
+# if one wasn't chosen via the "--tag" command line option.
+# Only attempt this if the compiler in the base compile
+# command doesn't match the default compiler.
+# arg is usually of the form 'gcc ...'
+func_infer_tag ()
+{
+    $debug_cmd
+
+    if test -n "$available_tags" && test -z "$tagname"; then
+      CC_quoted=
+      for arg in $CC; do
+	func_append_quoted CC_quoted "$arg"
+      done
+      CC_expanded=`func_echo_all $CC`
+      CC_quoted_expanded=`func_echo_all $CC_quoted`
+      case $@ in
+      # Blanks in the command may have been stripped by the calling shell,
+      # but not from the CC environment variable when configure was run.
+      " $CC "* | "$CC "* | " $CC_expanded "* | "$CC_expanded "* | \
+      " $CC_quoted"* | "$CC_quoted "* | " $CC_quoted_expanded "* | "$CC_quoted_expanded "*) ;;
+      # Blanks at the start of $base_compile will cause this to fail
+      # if we don't check for them as well.
+      *)
+	for z in $available_tags; do
+	  if $GREP "^# ### BEGIN LIBTOOL TAG CONFIG: $z$" < "$progpath" > /dev/null; then
+	    # Evaluate the configuration.
+	    eval "`$SED -n -e '/^# ### BEGIN LIBTOOL TAG CONFIG: '$z'$/,/^# ### END LIBTOOL TAG CONFIG: '$z'$/p' < $progpath`"
+	    CC_quoted=
+	    for arg in $CC; do
+	      # Double-quote args containing other shell metacharacters.
+	      func_append_quoted CC_quoted "$arg"
+	    done
+	    CC_expanded=`func_echo_all $CC`
+	    CC_quoted_expanded=`func_echo_all $CC_quoted`
+	    case "$@ " in
+	    " $CC "* | "$CC "* | " $CC_expanded "* | "$CC_expanded "* | \
+	    " $CC_quoted"* | "$CC_quoted "* | " $CC_quoted_expanded "* | "$CC_quoted_expanded "*)
+	      # The compiler in the base compile command matches
+	      # the one in the tagged configuration.
+	      # Assume this is the tagged configuration we want.
+	      tagname=$z
+	      break
+	      ;;
+	    esac
+	  fi
+	done
+	# If $tagname still isn't set, then no tagged configuration
+	# was found and let the user know that the "--tag" command
+	# line option must be used.
+	if test -z "$tagname"; then
+	  func_echo "unable to infer tagged configuration"
+	  func_fatal_error "specify a tag with '--tag'"
+#	else
+#	  func_verbose "using $tagname tagged configuration"
+	fi
+	;;
+      esac
+    fi
+}
+
+
+
+# func_write_libtool_object output_name pic_name nonpic_name
+# Create a libtool object file (analogous to a ".la" file),
+# but don't create it if we're doing a dry run.
+func_write_libtool_object ()
+{
+    write_libobj=$1
+    if test yes = "$build_libtool_libs"; then
+      write_lobj=\'$2\'
+    else
+      write_lobj=none
+    fi
+
+    if test yes = "$build_old_libs"; then
+      write_oldobj=\'$3\'
+    else
+      write_oldobj=none
+    fi
+
+    $opt_dry_run || {
+      cat >${write_libobj}T <<EOF
+# $write_libobj - a libtool object file
+# Generated by $PROGRAM (GNU $PACKAGE) $VERSION
+#
+# Please DO NOT delete this file!
+# It is necessary for linking the library.
+
+# Name of the PIC object.
+pic_object=$write_lobj
+
+# Name of the non-PIC object
+non_pic_object=$write_oldobj
+
+EOF
+      $MV "${write_libobj}T" "$write_libobj"
+    }
+}
+
+
+##################################################
+# FILE NAME AND PATH CONVERSION HELPER FUNCTIONS #
+##################################################
+
+# func_convert_core_file_wine_to_w32 ARG
+# Helper function used by file name conversion functions when $build is *nix,
+# and $host is mingw, cygwin, or some other w32 environment. Relies on a
+# correctly configured wine environment available, with the winepath program
+# in $build's $PATH.
+#
+# ARG is the $build file name to be converted to w32 format.
+# Result is available in $func_convert_core_file_wine_to_w32_result, and will
+# be empty on error (or when ARG is empty)
+func_convert_core_file_wine_to_w32 ()
+{
+  $debug_cmd
+
+  func_convert_core_file_wine_to_w32_result=$1
+  if test -n "$1"; then
+    # Unfortunately, winepath does not exit with a non-zero error code, so we
+    # are forced to check the contents of stdout. On the other hand, if the
+    # command is not found, the shell will set an exit code of 127 and print
+    # *an error message* to stdout. So we must check for both error code of
+    # zero AND non-empty stdout, which explains the odd construction:
+    func_convert_core_file_wine_to_w32_tmp=`winepath -w "$1" 2>/dev/null`
+    if test "$?" -eq 0 && test -n "$func_convert_core_file_wine_to_w32_tmp"; then
+      func_convert_core_file_wine_to_w32_result=`$ECHO "$func_convert_core_file_wine_to_w32_tmp" |
+        $SED -e "$sed_naive_backslashify"`
+    else
+      func_convert_core_file_wine_to_w32_result=
+    fi
+  fi
+}
+# end: func_convert_core_file_wine_to_w32
+
+
+# func_convert_core_path_wine_to_w32 ARG
+# Helper function used by path conversion functions when $build is *nix, and
+# $host is mingw, cygwin, or some other w32 environment. Relies on a correctly
+# configured wine environment available, with the winepath program in $build's
+# $PATH. Assumes ARG has no leading or trailing path separator characters.
+#
+# ARG is path to be converted from $build format to win32.
+# Result is available in $func_convert_core_path_wine_to_w32_result.
+# Unconvertible file (directory) names in ARG are skipped; if no directory names
+# are convertible, then the result may be empty.
+func_convert_core_path_wine_to_w32 ()
+{
+  $debug_cmd
+
+  # unfortunately, winepath doesn't convert paths, only file names
+  func_convert_core_path_wine_to_w32_result=
+  if test -n "$1"; then
+    oldIFS=$IFS
+    IFS=:
+    for func_convert_core_path_wine_to_w32_f in $1; do
+      IFS=$oldIFS
+      func_convert_core_file_wine_to_w32 "$func_convert_core_path_wine_to_w32_f"
+      if test -n "$func_convert_core_file_wine_to_w32_result"; then
+        if test -z "$func_convert_core_path_wine_to_w32_result"; then
+          func_convert_core_path_wine_to_w32_result=$func_convert_core_file_wine_to_w32_result
+        else
+          func_append func_convert_core_path_wine_to_w32_result ";$func_convert_core_file_wine_to_w32_result"
+        fi
+      fi
+    done
+    IFS=$oldIFS
+  fi
+}
+# end: func_convert_core_path_wine_to_w32
+
+
+# func_cygpath ARGS...
+# Wrapper around calling the cygpath program via LT_CYGPATH. This is used when
+# when (1) $build is *nix and Cygwin is hosted via a wine environment; or (2)
+# $build is MSYS and $host is Cygwin, or (3) $build is Cygwin. In case (1) or
+# (2), returns the Cygwin file name or path in func_cygpath_result (input
+# file name or path is assumed to be in w32 format, as previously converted
+# from $build's *nix or MSYS format). In case (3), returns the w32 file name
+# or path in func_cygpath_result (input file name or path is assumed to be in
+# Cygwin format). Returns an empty string on error.
+#
+# ARGS are passed to cygpath, with the last one being the file name or path to
+# be converted.
+#
+# Specify the absolute *nix (or w32) name to cygpath in the LT_CYGPATH
+# environment variable; do not put it in $PATH.
+func_cygpath ()
+{
+  $debug_cmd
+
+  if test -n "$LT_CYGPATH" && test -f "$LT_CYGPATH"; then
+    func_cygpath_result=`$LT_CYGPATH "$@" 2>/dev/null`
+    if test "$?" -ne 0; then
+      # on failure, ensure result is empty
+      func_cygpath_result=
+    fi
+  else
+    func_cygpath_result=
+    func_error "LT_CYGPATH is empty or specifies non-existent file: '$LT_CYGPATH'"
+  fi
+}
+#end: func_cygpath
+
+
+# func_convert_core_msys_to_w32 ARG
+# Convert file name or path ARG from MSYS format to w32 format.  Return
+# result in func_convert_core_msys_to_w32_result.
+func_convert_core_msys_to_w32 ()
+{
+  $debug_cmd
+
+  # awkward: cmd appends spaces to result
+  func_convert_core_msys_to_w32_result=`( cmd //c echo "$1" ) 2>/dev/null |
+    $SED -e 's/[ ]*$//' -e "$sed_naive_backslashify"`
+}
+#end: func_convert_core_msys_to_w32
+
+
+# func_convert_file_check ARG1 ARG2
+# Verify that ARG1 (a file name in $build format) was converted to $host
+# format in ARG2. Otherwise, emit an error message, but continue (resetting
+# func_to_host_file_result to ARG1).
+func_convert_file_check ()
+{
+  $debug_cmd
+
+  if test -z "$2" && test -n "$1"; then
+    func_error "Could not determine host file name corresponding to"
+    func_error "  '$1'"
+    func_error "Continuing, but uninstalled executables may not work."
+    # Fallback:
+    func_to_host_file_result=$1
+  fi
+}
+# end func_convert_file_check
+
+
+# func_convert_path_check FROM_PATHSEP TO_PATHSEP FROM_PATH TO_PATH
+# Verify that FROM_PATH (a path in $build format) was converted to $host
+# format in TO_PATH. Otherwise, emit an error message, but continue, resetting
+# func_to_host_file_result to a simplistic fallback value (see below).
+func_convert_path_check ()
+{
+  $debug_cmd
+
+  if test -z "$4" && test -n "$3"; then
+    func_error "Could not determine the host path corresponding to"
+    func_error "  '$3'"
+    func_error "Continuing, but uninstalled executables may not work."
+    # Fallback.  This is a deliberately simplistic "conversion" and
+    # should not be "improved".  See libtool.info.
+    if test "x$1" != "x$2"; then
+      lt_replace_pathsep_chars="s|$1|$2|g"
+      func_to_host_path_result=`echo "$3" |
+        $SED -e "$lt_replace_pathsep_chars"`
+    else
+      func_to_host_path_result=$3
+    fi
+  fi
+}
+# end func_convert_path_check
+
+
+# func_convert_path_front_back_pathsep FRONTPAT BACKPAT REPL ORIG
+# Modifies func_to_host_path_result by prepending REPL if ORIG matches FRONTPAT
+# and appending REPL if ORIG matches BACKPAT.
+func_convert_path_front_back_pathsep ()
+{
+  $debug_cmd
+
+  case $4 in
+  $1 ) func_to_host_path_result=$3$func_to_host_path_result
+    ;;
+  esac
+  case $4 in
+  $2 ) func_append func_to_host_path_result "$3"
+    ;;
+  esac
+}
+# end func_convert_path_front_back_pathsep
+
+
+##################################################
+# $build to $host FILE NAME CONVERSION FUNCTIONS #
+##################################################
+# invoked via '$to_host_file_cmd ARG'
+#
+# In each case, ARG is the path to be converted from $build to $host format.
+# Result will be available in $func_to_host_file_result.
+
+
+# func_to_host_file ARG
+# Converts the file name ARG from $build format to $host format. Return result
+# in func_to_host_file_result.
+func_to_host_file ()
+{
+  $debug_cmd
+
+  $to_host_file_cmd "$1"
+}
+# end func_to_host_file
+
+
+# func_to_tool_file ARG LAZY
+# converts the file name ARG from $build format to toolchain format. Return
+# result in func_to_tool_file_result.  If the conversion in use is listed
+# in (the comma separated) LAZY, no conversion takes place.
+func_to_tool_file ()
+{
+  $debug_cmd
+
+  case ,$2, in
+    *,"$to_tool_file_cmd",*)
+      func_to_tool_file_result=$1
+      ;;
+    *)
+      $to_tool_file_cmd "$1"
+      func_to_tool_file_result=$func_to_host_file_result
+      ;;
+  esac
+}
+# end func_to_tool_file
+
+
+# func_convert_file_noop ARG
+# Copy ARG to func_to_host_file_result.
+func_convert_file_noop ()
+{
+  func_to_host_file_result=$1
+}
+# end func_convert_file_noop
+
+
+# func_convert_file_msys_to_w32 ARG
+# Convert file name ARG from (mingw) MSYS to (mingw) w32 format; automatic
+# conversion to w32 is not available inside the cwrapper.  Returns result in
+# func_to_host_file_result.
+func_convert_file_msys_to_w32 ()
+{
+  $debug_cmd
+
+  func_to_host_file_result=$1
+  if test -n "$1"; then
+    func_convert_core_msys_to_w32 "$1"
+    func_to_host_file_result=$func_convert_core_msys_to_w32_result
+  fi
+  func_convert_file_check "$1" "$func_to_host_file_result"
+}
+# end func_convert_file_msys_to_w32
+
+
+# func_convert_file_cygwin_to_w32 ARG
+# Convert file name ARG from Cygwin to w32 format.  Returns result in
+# func_to_host_file_result.
+func_convert_file_cygwin_to_w32 ()
+{
+  $debug_cmd
+
+  func_to_host_file_result=$1
+  if test -n "$1"; then
+    # because $build is cygwin, we call "the" cygpath in $PATH; no need to use
+    # LT_CYGPATH in this case.
+    func_to_host_file_result=`cygpath -m "$1"`
+  fi
+  func_convert_file_check "$1" "$func_to_host_file_result"
+}
+# end func_convert_file_cygwin_to_w32
+
+
+# func_convert_file_nix_to_w32 ARG
+# Convert file name ARG from *nix to w32 format.  Requires a wine environment
+# and a working winepath. Returns result in func_to_host_file_result.
+func_convert_file_nix_to_w32 ()
+{
+  $debug_cmd
+
+  func_to_host_file_result=$1
+  if test -n "$1"; then
+    func_convert_core_file_wine_to_w32 "$1"
+    func_to_host_file_result=$func_convert_core_file_wine_to_w32_result
+  fi
+  func_convert_file_check "$1" "$func_to_host_file_result"
+}
+# end func_convert_file_nix_to_w32
+
+
+# func_convert_file_msys_to_cygwin ARG
+# Convert file name ARG from MSYS to Cygwin format.  Requires LT_CYGPATH set.
+# Returns result in func_to_host_file_result.
+func_convert_file_msys_to_cygwin ()
+{
+  $debug_cmd
+
+  func_to_host_file_result=$1
+  if test -n "$1"; then
+    func_convert_core_msys_to_w32 "$1"
+    func_cygpath -u "$func_convert_core_msys_to_w32_result"
+    func_to_host_file_result=$func_cygpath_result
+  fi
+  func_convert_file_check "$1" "$func_to_host_file_result"
+}
+# end func_convert_file_msys_to_cygwin
+
+
+# func_convert_file_nix_to_cygwin ARG
+# Convert file name ARG from *nix to Cygwin format.  Requires Cygwin installed
+# in a wine environment, working winepath, and LT_CYGPATH set.  Returns result
+# in func_to_host_file_result.
+func_convert_file_nix_to_cygwin ()
+{
+  $debug_cmd
+
+  func_to_host_file_result=$1
+  if test -n "$1"; then
+    # convert from *nix to w32, then use cygpath to convert from w32 to cygwin.
+    func_convert_core_file_wine_to_w32 "$1"
+    func_cygpath -u "$func_convert_core_file_wine_to_w32_result"
+    func_to_host_file_result=$func_cygpath_result
+  fi
+  func_convert_file_check "$1" "$func_to_host_file_result"
+}
+# end func_convert_file_nix_to_cygwin
+
+
+#############################################
+# $build to $host PATH CONVERSION FUNCTIONS #
+#############################################
+# invoked via '$to_host_path_cmd ARG'
+#
+# In each case, ARG is the path to be converted from $build to $host format.
+# The result will be available in $func_to_host_path_result.
+#
+# Path separators are also converted from $build format to $host format.  If
+# ARG begins or ends with a path separator character, it is preserved (but
+# converted to $host format) on output.
+#
+# All path conversion functions are named using the following convention:
+#   file name conversion function    : func_convert_file_X_to_Y ()
+#   path conversion function         : func_convert_path_X_to_Y ()
+# where, for any given $build/$host combination the 'X_to_Y' value is the
+# same.  If conversion functions are added for new $build/$host combinations,
+# the two new functions must follow this pattern, or func_init_to_host_path_cmd
+# will break.
+
+
+# func_init_to_host_path_cmd
+# Ensures that function "pointer" variable $to_host_path_cmd is set to the
+# appropriate value, based on the value of $to_host_file_cmd.
+to_host_path_cmd=
+func_init_to_host_path_cmd ()
+{
+  $debug_cmd
+
+  if test -z "$to_host_path_cmd"; then
+    func_stripname 'func_convert_file_' '' "$to_host_file_cmd"
+    to_host_path_cmd=func_convert_path_$func_stripname_result
+  fi
+}
+
+
+# func_to_host_path ARG
+# Converts the path ARG from $build format to $host format. Return result
+# in func_to_host_path_result.
+func_to_host_path ()
+{
+  $debug_cmd
+
+  func_init_to_host_path_cmd
+  $to_host_path_cmd "$1"
+}
+# end func_to_host_path
+
+
+# func_convert_path_noop ARG
+# Copy ARG to func_to_host_path_result.
+func_convert_path_noop ()
+{
+  func_to_host_path_result=$1
+}
+# end func_convert_path_noop
+
+
+# func_convert_path_msys_to_w32 ARG
+# Convert path ARG from (mingw) MSYS to (mingw) w32 format; automatic
+# conversion to w32 is not available inside the cwrapper.  Returns result in
+# func_to_host_path_result.
+func_convert_path_msys_to_w32 ()
+{
+  $debug_cmd
+
+  func_to_host_path_result=$1
+  if test -n "$1"; then
+    # Remove leading and trailing path separator characters from ARG.  MSYS
+    # behavior is inconsistent here; cygpath turns them into '.;' and ';.';
+    # and winepath ignores them completely.
+    func_stripname : : "$1"
+    func_to_host_path_tmp1=$func_stripname_result
+    func_convert_core_msys_to_w32 "$func_to_host_path_tmp1"
+    func_to_host_path_result=$func_convert_core_msys_to_w32_result
+    func_convert_path_check : ";" \
+      "$func_to_host_path_tmp1" "$func_to_host_path_result"
+    func_convert_path_front_back_pathsep ":*" "*:" ";" "$1"
+  fi
+}
+# end func_convert_path_msys_to_w32
+
+
+# func_convert_path_cygwin_to_w32 ARG
+# Convert path ARG from Cygwin to w32 format.  Returns result in
+# func_to_host_file_result.
+func_convert_path_cygwin_to_w32 ()
+{
+  $debug_cmd
+
+  func_to_host_path_result=$1
+  if test -n "$1"; then
+    # See func_convert_path_msys_to_w32:
+    func_stripname : : "$1"
+    func_to_host_path_tmp1=$func_stripname_result
+    func_to_host_path_result=`cygpath -m -p "$func_to_host_path_tmp1"`
+    func_convert_path_check : ";" \
+      "$func_to_host_path_tmp1" "$func_to_host_path_result"
+    func_convert_path_front_back_pathsep ":*" "*:" ";" "$1"
+  fi
+}
+# end func_convert_path_cygwin_to_w32
+
+
+# func_convert_path_nix_to_w32 ARG
+# Convert path ARG from *nix to w32 format.  Requires a wine environment and
+# a working winepath.  Returns result in func_to_host_file_result.
+func_convert_path_nix_to_w32 ()
+{
+  $debug_cmd
+
+  func_to_host_path_result=$1
+  if test -n "$1"; then
+    # See func_convert_path_msys_to_w32:
+    func_stripname : : "$1"
+    func_to_host_path_tmp1=$func_stripname_result
+    func_convert_core_path_wine_to_w32 "$func_to_host_path_tmp1"
+    func_to_host_path_result=$func_convert_core_path_wine_to_w32_result
+    func_convert_path_check : ";" \
+      "$func_to_host_path_tmp1" "$func_to_host_path_result"
+    func_convert_path_front_back_pathsep ":*" "*:" ";" "$1"
+  fi
+}
+# end func_convert_path_nix_to_w32
+
+
+# func_convert_path_msys_to_cygwin ARG
+# Convert path ARG from MSYS to Cygwin format.  Requires LT_CYGPATH set.
+# Returns result in func_to_host_file_result.
+func_convert_path_msys_to_cygwin ()
+{
+  $debug_cmd
+
+  func_to_host_path_result=$1
+  if test -n "$1"; then
+    # See func_convert_path_msys_to_w32:
+    func_stripname : : "$1"
+    func_to_host_path_tmp1=$func_stripname_result
+    func_convert_core_msys_to_w32 "$func_to_host_path_tmp1"
+    func_cygpath -u -p "$func_convert_core_msys_to_w32_result"
+    func_to_host_path_result=$func_cygpath_result
+    func_convert_path_check : : \
+      "$func_to_host_path_tmp1" "$func_to_host_path_result"
+    func_convert_path_front_back_pathsep ":*" "*:" : "$1"
+  fi
+}
+# end func_convert_path_msys_to_cygwin
+
+
+# func_convert_path_nix_to_cygwin ARG
+# Convert path ARG from *nix to Cygwin format.  Requires Cygwin installed in a
+# a wine environment, working winepath, and LT_CYGPATH set.  Returns result in
+# func_to_host_file_result.
+func_convert_path_nix_to_cygwin ()
+{
+  $debug_cmd
+
+  func_to_host_path_result=$1
+  if test -n "$1"; then
+    # Remove leading and trailing path separator characters from
+    # ARG. msys behavior is inconsistent here, cygpath turns them
+    # into '.;' and ';.', and winepath ignores them completely.
+    func_stripname : : "$1"
+    func_to_host_path_tmp1=$func_stripname_result
+    func_convert_core_path_wine_to_w32 "$func_to_host_path_tmp1"
+    func_cygpath -u -p "$func_convert_core_path_wine_to_w32_result"
+    func_to_host_path_result=$func_cygpath_result
+    func_convert_path_check : : \
+      "$func_to_host_path_tmp1" "$func_to_host_path_result"
+    func_convert_path_front_back_pathsep ":*" "*:" : "$1"
+  fi
+}
+# end func_convert_path_nix_to_cygwin
+
+
+# func_dll_def_p FILE
+# True iff FILE is a Windows DLL '.def' file.
+# Keep in sync with _LT_DLL_DEF_P in libtool.m4
+func_dll_def_p ()
+{
+  $debug_cmd
+
+  func_dll_def_p_tmp=`$SED -n \
+    -e 's/^[	 ]*//' \
+    -e '/^\(;.*\)*$/d' \
+    -e 's/^\(EXPORTS\|LIBRARY\)\([	 ].*\)*$/DEF/p' \
+    -e q \
+    "$1"`
+  test DEF = "$func_dll_def_p_tmp"
+}
+
+
+# func_mode_compile arg...
+func_mode_compile ()
+{
+    $debug_cmd
+
+    # Get the compilation command and the source file.
+    base_compile=
+    srcfile=$nonopt  #  always keep a non-empty value in "srcfile"
+    suppress_opt=yes
+    suppress_output=
+    arg_mode=normal
+    libobj=
+    later=
+    pie_flag=
+
+    for arg
+    do
+      case $arg_mode in
+      arg  )
+	# do not "continue".  Instead, add this to base_compile
+	lastarg=$arg
+	arg_mode=normal
+	;;
+
+      target )
+	libobj=$arg
+	arg_mode=normal
+	continue
+	;;
+
+      normal )
+	# Accept any command-line options.
+	case $arg in
+	-o)
+	  test -n "$libobj" && \
+	    func_fatal_error "you cannot specify '-o' more than once"
+	  arg_mode=target
+	  continue
+	  ;;
+
+	-pie | -fpie | -fPIE)
+          func_append pie_flag " $arg"
+	  continue
+	  ;;
+
+	-shared | -static | -prefer-pic | -prefer-non-pic)
+	  func_append later " $arg"
+	  continue
+	  ;;
+
+	-no-suppress)
+	  suppress_opt=no
+	  continue
+	  ;;
+
+	-Xcompiler)
+	  arg_mode=arg  #  the next one goes into the "base_compile" arg list
+	  continue      #  The current "srcfile" will either be retained or
+	  ;;            #  replaced later.  I would guess that would be a bug.
+
+	-Wc,*)
+	  func_stripname '-Wc,' '' "$arg"
+	  args=$func_stripname_result
+	  lastarg=
+	  save_ifs=$IFS; IFS=,
+	  for arg in $args; do
+	    IFS=$save_ifs
+	    func_append_quoted lastarg "$arg"
+	  done
+	  IFS=$save_ifs
+	  func_stripname ' ' '' "$lastarg"
+	  lastarg=$func_stripname_result
+
+	  # Add the arguments to base_compile.
+	  func_append base_compile " $lastarg"
+	  continue
+	  ;;
+
+	*)
+	  # Accept the current argument as the source file.
+	  # The previous "srcfile" becomes the current argument.
+	  #
+	  lastarg=$srcfile
+	  srcfile=$arg
+	  ;;
+	esac  #  case $arg
+	;;
+      esac    #  case $arg_mode
+
+      # Aesthetically quote the previous argument.
+      func_append_quoted base_compile "$lastarg"
+    done # for arg
+
+    case $arg_mode in
+    arg)
+      func_fatal_error "you must specify an argument for -Xcompile"
+      ;;
+    target)
+      func_fatal_error "you must specify a target with '-o'"
+      ;;
+    *)
+      # Get the name of the library object.
+      test -z "$libobj" && {
+	func_basename "$srcfile"
+	libobj=$func_basename_result
+      }
+      ;;
+    esac
+
+    # Recognize several different file suffixes.
+    # If the user specifies -o file.o, it is replaced with file.lo
+    case $libobj in
+    *.[cCFSifmso] | \
+    *.ada | *.adb | *.ads | *.asm | \
+    *.c++ | *.cc | *.ii | *.class | *.cpp | *.cxx | \
+    *.[fF][09]? | *.for | *.java | *.go | *.obj | *.sx | *.cu | *.cup)
+      func_xform "$libobj"
+      libobj=$func_xform_result
+      ;;
+    esac
+
+    case $libobj in
+    *.lo) func_lo2o "$libobj"; obj=$func_lo2o_result ;;
+    *)
+      func_fatal_error "cannot determine name of library object from '$libobj'"
+      ;;
+    esac
+
+    func_infer_tag $base_compile
+
+    for arg in $later; do
+      case $arg in
+      -shared)
+	test yes = "$build_libtool_libs" \
+	  || func_fatal_configuration "cannot build a shared library"
+	build_old_libs=no
+	continue
+	;;
+
+      -static)
+	build_libtool_libs=no
+	build_old_libs=yes
+	continue
+	;;
+
+      -prefer-pic)
+	pic_mode=yes
+	continue
+	;;
+
+      -prefer-non-pic)
+	pic_mode=no
+	continue
+	;;
+      esac
+    done
+
+    func_quote_for_eval "$libobj"
+    test "X$libobj" != "X$func_quote_for_eval_result" \
+      && $ECHO "X$libobj" | $GREP '[]~#^*{};<>?"'"'"'	 &()|`$[]' \
+      && func_warning "libobj name '$libobj' may not contain shell special characters."
+    func_dirname_and_basename "$obj" "/" ""
+    objname=$func_basename_result
+    xdir=$func_dirname_result
+    lobj=$xdir$objdir/$objname
+
+    test -z "$base_compile" && \
+      func_fatal_help "you must specify a compilation command"
+
+    # Delete any leftover library objects.
+    if test yes = "$build_old_libs"; then
+      removelist="$obj $lobj $libobj ${libobj}T"
+    else
+      removelist="$lobj $libobj ${libobj}T"
+    fi
+
+    # On Cygwin there's no "real" PIC flag so we must build both object types
+    case $host_os in
+    cygwin* | mingw* | pw32* | os2* | cegcc*)
+      pic_mode=default
+      ;;
+    esac
+    if test no = "$pic_mode" && test pass_all != "$deplibs_check_method"; then
+      # non-PIC code in shared libraries is not supported
+      pic_mode=default
+    fi
+
+    # Calculate the filename of the output object if compiler does
+    # not support -o with -c
+    if test no = "$compiler_c_o"; then
+      output_obj=`$ECHO "$srcfile" | $SED 's%^.*/%%; s%\.[^.]*$%%'`.$objext
+      lockfile=$output_obj.lock
+    else
+      output_obj=
+      need_locks=no
+      lockfile=
+    fi
+
+    # Lock this critical section if it is needed
+    # We use this script file to make the link, it avoids creating a new file
+    if test yes = "$need_locks"; then
+      until $opt_dry_run || ln "$progpath" "$lockfile" 2>/dev/null; do
+	func_echo "Waiting for $lockfile to be removed"
+	sleep 2
+      done
+    elif test warn = "$need_locks"; then
+      if test -f "$lockfile"; then
+	$ECHO "\
+*** ERROR, $lockfile exists and contains:
+`cat $lockfile 2>/dev/null`
+
+This indicates that another process is trying to use the same
+temporary object file, and libtool could not work around it because
+your compiler does not support '-c' and '-o' together.  If you
+repeat this compilation, it may succeed, by chance, but you had better
+avoid parallel builds (make -j) in this platform, or get a better
+compiler."
+
+	$opt_dry_run || $RM $removelist
+	exit $EXIT_FAILURE
+      fi
+      func_append removelist " $output_obj"
+      $ECHO "$srcfile" > "$lockfile"
+    fi
+
+    $opt_dry_run || $RM $removelist
+    func_append removelist " $lockfile"
+    trap '$opt_dry_run || $RM $removelist; exit $EXIT_FAILURE' 1 2 15
+
+    func_to_tool_file "$srcfile" func_convert_file_msys_to_w32
+    srcfile=$func_to_tool_file_result
+    func_quote_for_eval "$srcfile"
+    qsrcfile=$func_quote_for_eval_result
+
+    # Only build a PIC object if we are building libtool libraries.
+    if test yes = "$build_libtool_libs"; then
+      # Without this assignment, base_compile gets emptied.
+      fbsd_hideous_sh_bug=$base_compile
+
+      if test no != "$pic_mode"; then
+	command="$base_compile $qsrcfile $pic_flag"
+      else
+	# Don't build PIC code
+	command="$base_compile $qsrcfile"
+      fi
+
+      func_mkdir_p "$xdir$objdir"
+
+      if test -z "$output_obj"; then
+	# Place PIC objects in $objdir
+	func_append command " -o $lobj"
+      fi
+
+      func_show_eval_locale "$command"	\
+          'test -n "$output_obj" && $RM $removelist; exit $EXIT_FAILURE'
+
+      if test warn = "$need_locks" &&
+	 test "X`cat $lockfile 2>/dev/null`" != "X$srcfile"; then
+	$ECHO "\
+*** ERROR, $lockfile contains:
+`cat $lockfile 2>/dev/null`
+
+but it should contain:
+$srcfile
+
+This indicates that another process is trying to use the same
+temporary object file, and libtool could not work around it because
+your compiler does not support '-c' and '-o' together.  If you
+repeat this compilation, it may succeed, by chance, but you had better
+avoid parallel builds (make -j) in this platform, or get a better
+compiler."
+
+	$opt_dry_run || $RM $removelist
+	exit $EXIT_FAILURE
+      fi
+
+      # Just move the object if needed, then go on to compile the next one
+      if test -n "$output_obj" && test "X$output_obj" != "X$lobj"; then
+	func_show_eval '$MV "$output_obj" "$lobj"' \
+	  'error=$?; $opt_dry_run || $RM $removelist; exit $error'
+      fi
+
+      # Allow error messages only from the first compilation.
+      if test yes = "$suppress_opt"; then
+	suppress_output=' >/dev/null 2>&1'
+      fi
+    fi
+
+    # Only build a position-dependent object if we build old libraries.
+    if test yes = "$build_old_libs"; then
+      if test yes != "$pic_mode"; then
+	# Don't build PIC code
+	command="$base_compile $qsrcfile$pie_flag"
+      else
+	command="$base_compile $qsrcfile $pic_flag"
+      fi
+      if test yes = "$compiler_c_o"; then
+	func_append command " -o $obj"
+      fi
+
+      # Suppress compiler output if we already did a PIC compilation.
+      func_append command "$suppress_output"
+      func_show_eval_locale "$command" \
+        '$opt_dry_run || $RM $removelist; exit $EXIT_FAILURE'
+
+      if test warn = "$need_locks" &&
+	 test "X`cat $lockfile 2>/dev/null`" != "X$srcfile"; then
+	$ECHO "\
+*** ERROR, $lockfile contains:
+`cat $lockfile 2>/dev/null`
+
+but it should contain:
+$srcfile
+
+This indicates that another process is trying to use the same
+temporary object file, and libtool could not work around it because
+your compiler does not support '-c' and '-o' together.  If you
+repeat this compilation, it may succeed, by chance, but you had better
+avoid parallel builds (make -j) in this platform, or get a better
+compiler."
+
+	$opt_dry_run || $RM $removelist
+	exit $EXIT_FAILURE
+      fi
+
+      # Just move the object if needed
+      if test -n "$output_obj" && test "X$output_obj" != "X$obj"; then
+	func_show_eval '$MV "$output_obj" "$obj"' \
+	  'error=$?; $opt_dry_run || $RM $removelist; exit $error'
+      fi
+    fi
+
+    $opt_dry_run || {
+      func_write_libtool_object "$libobj" "$objdir/$objname" "$objname"
+
+      # Unlock the critical section if it was locked
+      if test no != "$need_locks"; then
+	removelist=$lockfile
+        $RM "$lockfile"
+      fi
+    }
+
+    exit $EXIT_SUCCESS
+}
+
+$opt_help || {
+  test compile = "$opt_mode" && func_mode_compile ${1+"$@"}
+}
+
+func_mode_help ()
+{
+    # We need to display help for each of the modes.
+    case $opt_mode in
+      "")
+        # Generic help is extracted from the usage comments
+        # at the start of this file.
+        func_help
+        ;;
+
+      clean)
+        $ECHO \
+"Usage: $progname [OPTION]... --mode=clean RM [RM-OPTION]... FILE...
+
+Remove files from the build directory.
+
+RM is the name of the program to use to delete files associated with each FILE
+(typically '/bin/rm').  RM-OPTIONS are options (such as '-f') to be passed
+to RM.
+
+If FILE is a libtool library, object or program, all the files associated
+with it are deleted. Otherwise, only FILE itself is deleted using RM."
+        ;;
+
+      compile)
+      $ECHO \
+"Usage: $progname [OPTION]... --mode=compile COMPILE-COMMAND... SOURCEFILE
+
+Compile a source file into a libtool library object.
+
+This mode accepts the following additional options:
+
+  -o OUTPUT-FILE    set the output file name to OUTPUT-FILE
+  -no-suppress      do not suppress compiler output for multiple passes
+  -prefer-pic       try to build PIC objects only
+  -prefer-non-pic   try to build non-PIC objects only
+  -shared           do not build a '.o' file suitable for static linking
+  -static           only build a '.o' file suitable for static linking
+  -Wc,FLAG          pass FLAG directly to the compiler
+
+COMPILE-COMMAND is a command to be used in creating a 'standard' object file
+from the given SOURCEFILE.
+
+The output file name is determined by removing the directory component from
+SOURCEFILE, then substituting the C source code suffix '.c' with the
+library object suffix, '.lo'."
+        ;;
+
+      execute)
+        $ECHO \
+"Usage: $progname [OPTION]... --mode=execute COMMAND [ARGS]...
+
+Automatically set library path, then run a program.
+
+This mode accepts the following additional options:
+
+  -dlopen FILE      add the directory containing FILE to the library path
+
+This mode sets the library path environment variable according to '-dlopen'
+flags.
+
+If any of the ARGS are libtool executable wrappers, then they are translated
+into their corresponding uninstalled binary, and any of their required library
+directories are added to the library path.
+
+Then, COMMAND is executed, with ARGS as arguments."
+        ;;
+
+      finish)
+        $ECHO \
+"Usage: $progname [OPTION]... --mode=finish [LIBDIR]...
+
+Complete the installation of libtool libraries.
+
+Each LIBDIR is a directory that contains libtool libraries.
+
+The commands that this mode executes may require superuser privileges.  Use
+the '--dry-run' option if you just want to see what would be executed."
+        ;;
+
+      install)
+        $ECHO \
+"Usage: $progname [OPTION]... --mode=install INSTALL-COMMAND...
+
+Install executables or libraries.
+
+INSTALL-COMMAND is the installation command.  The first component should be
+either the 'install' or 'cp' program.
+
+The following components of INSTALL-COMMAND are treated specially:
+
+  -inst-prefix-dir PREFIX-DIR  Use PREFIX-DIR as a staging area for installation
+
+The rest of the components are interpreted as arguments to that command (only
+BSD-compatible install options are recognized)."
+        ;;
+
+      link)
+        $ECHO \
+"Usage: $progname [OPTION]... --mode=link LINK-COMMAND...
+
+Link object files or libraries together to form another library, or to
+create an executable program.
+
+LINK-COMMAND is a command using the C compiler that you would use to create
+a program from several object files.
+
+The following components of LINK-COMMAND are treated specially:
+
+  -all-static       do not do any dynamic linking at all
+  -avoid-version    do not add a version suffix if possible
+  -bindir BINDIR    specify path to binaries directory (for systems where
+                    libraries must be found in the PATH setting at runtime)
+  -dlopen FILE      '-dlpreopen' FILE if it cannot be dlopened at runtime
+  -dlpreopen FILE   link in FILE and add its symbols to lt_preloaded_symbols
+  -export-dynamic   allow symbols from OUTPUT-FILE to be resolved with dlsym(3)
+  -export-symbols SYMFILE
+                    try to export only the symbols listed in SYMFILE
+  -export-symbols-regex REGEX
+                    try to export only the symbols matching REGEX
+  -LLIBDIR          search LIBDIR for required installed libraries
+  -lNAME            OUTPUT-FILE requires the installed library libNAME
+  -module           build a library that can dlopened
+  -no-fast-install  disable the fast-install mode
+  -no-install       link a not-installable executable
+  -no-undefined     declare that a library does not refer to external symbols
+  -o OUTPUT-FILE    create OUTPUT-FILE from the specified objects
+  -objectlist FILE  use a list of object files found in FILE to specify objects
+  -os2dllname NAME  force a short DLL name on OS/2 (no effect on other OSes)
+  -precious-files-regex REGEX
+                    don't remove output files matching REGEX
+  -release RELEASE  specify package release information
+  -rpath LIBDIR     the created library will eventually be installed in LIBDIR
+  -R[ ]LIBDIR       add LIBDIR to the runtime path of programs and libraries
+  -shared           only do dynamic linking of libtool libraries
+  -shrext SUFFIX    override the standard shared library file extension
+  -static           do not do any dynamic linking of uninstalled libtool libraries
+  -static-libtool-libs
+                    do not do any dynamic linking of libtool libraries
+  -version-info CURRENT[:REVISION[:AGE]]
+                    specify library version info [each variable defaults to 0]
+  -weak LIBNAME     declare that the target provides the LIBNAME interface
+  -Wc,FLAG
+  -Xcompiler FLAG   pass linker-specific FLAG directly to the compiler
+  -Wl,FLAG
+  -Xlinker FLAG     pass linker-specific FLAG directly to the linker
+  -XCClinker FLAG   pass link-specific FLAG to the compiler driver (CC)
+
+All other options (arguments beginning with '-') are ignored.
+
+Every other argument is treated as a filename.  Files ending in '.la' are
+treated as uninstalled libtool libraries, other files are standard or library
+object files.
+
+If the OUTPUT-FILE ends in '.la', then a libtool library is created,
+only library objects ('.lo' files) may be specified, and '-rpath' is
+required, except when creating a convenience library.
+
+If OUTPUT-FILE ends in '.a' or '.lib', then a standard library is created
+using 'ar' and 'ranlib', or on Windows using 'lib'.
+
+If OUTPUT-FILE ends in '.lo' or '.$objext', then a reloadable object file
+is created, otherwise an executable program is created."
+        ;;
+
+      uninstall)
+        $ECHO \
+"Usage: $progname [OPTION]... --mode=uninstall RM [RM-OPTION]... FILE...
+
+Remove libraries from an installation directory.
+
+RM is the name of the program to use to delete files associated with each FILE
+(typically '/bin/rm').  RM-OPTIONS are options (such as '-f') to be passed
+to RM.
+
+If FILE is a libtool library, all the files associated with it are deleted.
+Otherwise, only FILE itself is deleted using RM."
+        ;;
+
+      *)
+        func_fatal_help "invalid operation mode '$opt_mode'"
+        ;;
+    esac
+
+    echo
+    $ECHO "Try '$progname --help' for more information about other modes."
+}
+
+# Now that we've collected a possible --mode arg, show help if necessary
+if $opt_help; then
+  if test : = "$opt_help"; then
+    func_mode_help
+  else
+    {
+      func_help noexit
+      for opt_mode in compile link execute install finish uninstall clean; do
+	func_mode_help
+      done
+    } | $SED -n '1p; 2,$s/^Usage:/  or: /p'
+    {
+      func_help noexit
+      for opt_mode in compile link execute install finish uninstall clean; do
+	echo
+	func_mode_help
+      done
+    } |
+    $SED '1d
+      /^When reporting/,/^Report/{
+	H
+	d
+      }
+      $x
+      /information about other modes/d
+      /more detailed .*MODE/d
+      s/^Usage:.*--mode=\([^ ]*\) .*/Description of \1 mode:/'
+  fi
+  exit $?
+fi
+
+
+# func_mode_execute arg...
+func_mode_execute ()
+{
+    $debug_cmd
+
+    # The first argument is the command name.
+    cmd=$nonopt
+    test -z "$cmd" && \
+      func_fatal_help "you must specify a COMMAND"
+
+    # Handle -dlopen flags immediately.
+    for file in $opt_dlopen; do
+      test -f "$file" \
+	|| func_fatal_help "'$file' is not a file"
+
+      dir=
+      case $file in
+      *.la)
+	func_resolve_sysroot "$file"
+	file=$func_resolve_sysroot_result
+
+	# Check to see that this really is a libtool archive.
+	func_lalib_unsafe_p "$file" \
+	  || func_fatal_help "'$lib' is not a valid libtool archive"
+
+	# Read the libtool library.
+	dlname=
+	library_names=
+	func_source "$file"
+
+	# Skip this library if it cannot be dlopened.
+	if test -z "$dlname"; then
+	  # Warn if it was a shared library.
+	  test -n "$library_names" && \
+	    func_warning "'$file' was not linked with '-export-dynamic'"
+	  continue
+	fi
+
+	func_dirname "$file" "" "."
+	dir=$func_dirname_result
+
+	if test -f "$dir/$objdir/$dlname"; then
+	  func_append dir "/$objdir"
+	else
+	  if test ! -f "$dir/$dlname"; then
+	    func_fatal_error "cannot find '$dlname' in '$dir' or '$dir/$objdir'"
+	  fi
+	fi
+	;;
+
+      *.lo)
+	# Just add the directory containing the .lo file.
+	func_dirname "$file" "" "."
+	dir=$func_dirname_result
+	;;
+
+      *)
+	func_warning "'-dlopen' is ignored for non-libtool libraries and objects"
+	continue
+	;;
+      esac
+
+      # Get the absolute pathname.
+      absdir=`cd "$dir" && pwd`
+      test -n "$absdir" && dir=$absdir
+
+      # Now add the directory to shlibpath_var.
+      if eval "test -z \"\$$shlibpath_var\""; then
+	eval "$shlibpath_var=\"\$dir\""
+      else
+	eval "$shlibpath_var=\"\$dir:\$$shlibpath_var\""
+      fi
+    done
+
+    # This variable tells wrapper scripts just to set shlibpath_var
+    # rather than running their programs.
+    libtool_execute_magic=$magic
+
+    # Check if any of the arguments is a wrapper script.
+    args=
+    for file
+    do
+      case $file in
+      -* | *.la | *.lo ) ;;
+      *)
+	# Do a test to see if this is really a libtool program.
+	if func_ltwrapper_script_p "$file"; then
+	  func_source "$file"
+	  # Transform arg to wrapped name.
+	  file=$progdir/$program
+	elif func_ltwrapper_executable_p "$file"; then
+	  func_ltwrapper_scriptname "$file"
+	  func_source "$func_ltwrapper_scriptname_result"
+	  # Transform arg to wrapped name.
+	  file=$progdir/$program
+	fi
+	;;
+      esac
+      # Quote arguments (to preserve shell metacharacters).
+      func_append_quoted args "$file"
+    done
+
+    if $opt_dry_run; then
+      # Display what would be done.
+      if test -n "$shlibpath_var"; then
+	eval "\$ECHO \"\$shlibpath_var=\$$shlibpath_var\""
+	echo "export $shlibpath_var"
+      fi
+      $ECHO "$cmd$args"
+      exit $EXIT_SUCCESS
+    else
+      if test -n "$shlibpath_var"; then
+	# Export the shlibpath_var.
+	eval "export $shlibpath_var"
+      fi
+
+      # Restore saved environment variables
+      for lt_var in LANG LANGUAGE LC_ALL LC_CTYPE LC_COLLATE LC_MESSAGES
+      do
+	eval "if test \"\${save_$lt_var+set}\" = set; then
+                $lt_var=\$save_$lt_var; export $lt_var
+	      else
+		$lt_unset $lt_var
+	      fi"
+      done
+
+      # Now prepare to actually exec the command.
+      exec_cmd=\$cmd$args
+    fi
+}
+
+test execute = "$opt_mode" && func_mode_execute ${1+"$@"}
+
+
+# func_mode_finish arg...
+func_mode_finish ()
+{
+    $debug_cmd
+
+    libs=
+    libdirs=
+    admincmds=
+
+    for opt in "$nonopt" ${1+"$@"}
+    do
+      if test -d "$opt"; then
+	func_append libdirs " $opt"
+
+      elif test -f "$opt"; then
+	if func_lalib_unsafe_p "$opt"; then
+	  func_append libs " $opt"
+	else
+	  func_warning "'$opt' is not a valid libtool archive"
+	fi
+
+      else
+	func_fatal_error "invalid argument '$opt'"
+      fi
+    done
+
+    if test -n "$libs"; then
+      if test -n "$lt_sysroot"; then
+        sysroot_regex=`$ECHO "$lt_sysroot" | $SED "$sed_make_literal_regex"`
+        sysroot_cmd="s/\([ ']\)$sysroot_regex/\1/g;"
+      else
+        sysroot_cmd=
+      fi
+
+      # Remove sysroot references
+      if $opt_dry_run; then
+        for lib in $libs; do
+          echo "removing references to $lt_sysroot and '=' prefixes from $lib"
+        done
+      else
+        tmpdir=`func_mktempdir`
+        for lib in $libs; do
+	  $SED -e "$sysroot_cmd s/\([ ']-[LR]\)=/\1/g; s/\([ ']\)=/\1/g" $lib \
+	    > $tmpdir/tmp-la
+	  mv -f $tmpdir/tmp-la $lib
+	done
+        ${RM}r "$tmpdir"
+      fi
+    fi
+
+    if test -n "$finish_cmds$finish_eval" && test -n "$libdirs"; then
+      for libdir in $libdirs; do
+	if test -n "$finish_cmds"; then
+	  # Do each command in the finish commands.
+	  func_execute_cmds "$finish_cmds" 'admincmds="$admincmds
+'"$cmd"'"'
+	fi
+	if test -n "$finish_eval"; then
+	  # Do the single finish_eval.
+	  eval cmds=\"$finish_eval\"
+	  $opt_dry_run || eval "$cmds" || func_append admincmds "
+       $cmds"
+	fi
+      done
+    fi
+
+    # Exit here if they wanted silent mode.
+    $opt_quiet && exit $EXIT_SUCCESS
+
+    if test -n "$finish_cmds$finish_eval" && test -n "$libdirs"; then
+      echo "----------------------------------------------------------------------"
+      echo "Libraries have been installed in:"
+      for libdir in $libdirs; do
+	$ECHO "   $libdir"
+      done
+      echo
+      echo "If you ever happen to want to link against installed libraries"
+      echo "in a given directory, LIBDIR, you must either use libtool, and"
+      echo "specify the full pathname of the library, or use the '-LLIBDIR'"
+      echo "flag during linking and do at least one of the following:"
+      if test -n "$shlibpath_var"; then
+	echo "   - add LIBDIR to the '$shlibpath_var' environment variable"
+	echo "     during execution"
+      fi
+      if test -n "$runpath_var"; then
+	echo "   - add LIBDIR to the '$runpath_var' environment variable"
+	echo "     during linking"
+      fi
+      if test -n "$hardcode_libdir_flag_spec"; then
+	libdir=LIBDIR
+	eval flag=\"$hardcode_libdir_flag_spec\"
+
+	$ECHO "   - use the '$flag' linker flag"
+      fi
+      if test -n "$admincmds"; then
+	$ECHO "   - have your system administrator run these commands:$admincmds"
+      fi
+      if test -f /etc/ld.so.conf; then
+	echo "   - have your system administrator add LIBDIR to '/etc/ld.so.conf'"
+      fi
+      echo
+
+      echo "See any operating system documentation about shared libraries for"
+      case $host in
+	solaris2.[6789]|solaris2.1[0-9])
+	  echo "more information, such as the ld(1), crle(1) and ld.so(8) manual"
+	  echo "pages."
+	  ;;
+	*)
+	  echo "more information, such as the ld(1) and ld.so(8) manual pages."
+	  ;;
+      esac
+      echo "----------------------------------------------------------------------"
+    fi
+    exit $EXIT_SUCCESS
+}
+
+test finish = "$opt_mode" && func_mode_finish ${1+"$@"}
+
+
+# func_mode_install arg...
+func_mode_install ()
+{
+    $debug_cmd
+
+    # There may be an optional sh(1) argument at the beginning of
+    # install_prog (especially on Windows NT).
+    if test "$SHELL" = "$nonopt" || test /bin/sh = "$nonopt" ||
+       # Allow the use of GNU shtool's install command.
+       case $nonopt in *shtool*) :;; *) false;; esac
+    then
+      # Aesthetically quote it.
+      func_quote_for_eval "$nonopt"
+      install_prog="$func_quote_for_eval_result "
+      arg=$1
+      shift
+    else
+      install_prog=
+      arg=$nonopt
+    fi
+
+    # The real first argument should be the name of the installation program.
+    # Aesthetically quote it.
+    func_quote_for_eval "$arg"
+    func_append install_prog "$func_quote_for_eval_result"
+    install_shared_prog=$install_prog
+    case " $install_prog " in
+      *[\\\ /]cp\ *) install_cp=: ;;
+      *) install_cp=false ;;
+    esac
+
+    # We need to accept at least all the BSD install flags.
+    dest=
+    files=
+    opts=
+    prev=
+    install_type=
+    isdir=false
+    stripme=
+    no_mode=:
+    for arg
+    do
+      arg2=
+      if test -n "$dest"; then
+	func_append files " $dest"
+	dest=$arg
+	continue
+      fi
+
+      case $arg in
+      -d) isdir=: ;;
+      -f)
+	if $install_cp; then :; else
+	  prev=$arg
+	fi
+	;;
+      -g | -m | -o)
+	prev=$arg
+	;;
+      -s)
+	stripme=" -s"
+	continue
+	;;
+      -*)
+	;;
+      *)
+	# If the previous option needed an argument, then skip it.
+	if test -n "$prev"; then
+	  if test X-m = "X$prev" && test -n "$install_override_mode"; then
+	    arg2=$install_override_mode
+	    no_mode=false
+	  fi
+	  prev=
+	else
+	  dest=$arg
+	  continue
+	fi
+	;;
+      esac
+
+      # Aesthetically quote the argument.
+      func_quote_for_eval "$arg"
+      func_append install_prog " $func_quote_for_eval_result"
+      if test -n "$arg2"; then
+	func_quote_for_eval "$arg2"
+      fi
+      func_append install_shared_prog " $func_quote_for_eval_result"
+    done
+
+    test -z "$install_prog" && \
+      func_fatal_help "you must specify an install program"
+
+    test -n "$prev" && \
+      func_fatal_help "the '$prev' option requires an argument"
+
+    if test -n "$install_override_mode" && $no_mode; then
+      if $install_cp; then :; else
+	func_quote_for_eval "$install_override_mode"
+	func_append install_shared_prog " -m $func_quote_for_eval_result"
+      fi
+    fi
+
+    if test -z "$files"; then
+      if test -z "$dest"; then
+	func_fatal_help "no file or destination specified"
+      else
+	func_fatal_help "you must specify a destination"
+      fi
+    fi
+
+    # Strip any trailing slash from the destination.
+    func_stripname '' '/' "$dest"
+    dest=$func_stripname_result
+
+    # Check to see that the destination is a directory.
+    test -d "$dest" && isdir=:
+    if $isdir; then
+      destdir=$dest
+      destname=
+    else
+      func_dirname_and_basename "$dest" "" "."
+      destdir=$func_dirname_result
+      destname=$func_basename_result
+
+      # Not a directory, so check to see that there is only one file specified.
+      set dummy $files; shift
+      test "$#" -gt 1 && \
+	func_fatal_help "'$dest' is not a directory"
+    fi
+    case $destdir in
+    [\\/]* | [A-Za-z]:[\\/]*) ;;
+    *)
+      for file in $files; do
+	case $file in
+	*.lo) ;;
+	*)
+	  func_fatal_help "'$destdir' must be an absolute directory name"
+	  ;;
+	esac
+      done
+      ;;
+    esac
+
+    # This variable tells wrapper scripts just to set variables rather
+    # than running their programs.
+    libtool_install_magic=$magic
+
+    staticlibs=
+    future_libdirs=
+    current_libdirs=
+    for file in $files; do
+
+      # Do each installation.
+      case $file in
+      *.$libext)
+	# Do the static libraries later.
+	func_append staticlibs " $file"
+	;;
+
+      *.la)
+	func_resolve_sysroot "$file"
+	file=$func_resolve_sysroot_result
+
+	# Check to see that this really is a libtool archive.
+	func_lalib_unsafe_p "$file" \
+	  || func_fatal_help "'$file' is not a valid libtool archive"
+
+	library_names=
+	old_library=
+	relink_command=
+	func_source "$file"
+
+	# Add the libdir to current_libdirs if it is the destination.
+	if test "X$destdir" = "X$libdir"; then
+	  case "$current_libdirs " in
+	  *" $libdir "*) ;;
+	  *) func_append current_libdirs " $libdir" ;;
+	  esac
+	else
+	  # Note the libdir as a future libdir.
+	  case "$future_libdirs " in
+	  *" $libdir "*) ;;
+	  *) func_append future_libdirs " $libdir" ;;
+	  esac
+	fi
+
+	func_dirname "$file" "/" ""
+	dir=$func_dirname_result
+	func_append dir "$objdir"
+
+	if test -n "$relink_command"; then
+	  # Determine the prefix the user has applied to our future dir.
+	  inst_prefix_dir=`$ECHO "$destdir" | $SED -e "s%$libdir\$%%"`
+
+	  # Don't allow the user to place us outside of our expected
+	  # location b/c this prevents finding dependent libraries that
+	  # are installed to the same prefix.
+	  # At present, this check doesn't affect windows .dll's that
+	  # are installed into $libdir/../bin (currently, that works fine)
+	  # but it's something to keep an eye on.
+	  test "$inst_prefix_dir" = "$destdir" && \
+	    func_fatal_error "error: cannot install '$file' to a directory not ending in $libdir"
+
+	  if test -n "$inst_prefix_dir"; then
+	    # Stick the inst_prefix_dir data into the link command.
+	    relink_command=`$ECHO "$relink_command" | $SED "s%@inst_prefix_dir@%-inst-prefix-dir $inst_prefix_dir%"`
+	  else
+	    relink_command=`$ECHO "$relink_command" | $SED "s%@inst_prefix_dir@%%"`
+	  fi
+
+	  func_warning "relinking '$file'"
+	  func_show_eval "$relink_command" \
+	    'func_fatal_error "error: relink '\''$file'\'' with the above command before installing it"'
+	fi
+
+	# See the names of the shared library.
+	set dummy $library_names; shift
+	if test -n "$1"; then
+	  realname=$1
+	  shift
+
+	  srcname=$realname
+	  test -n "$relink_command" && srcname=${realname}T
+
+	  # Install the shared library and build the symlinks.
+	  func_show_eval "$install_shared_prog $dir/$srcname $destdir/$realname" \
+	      'exit $?'
+	  tstripme=$stripme
+	  case $host_os in
+	  cygwin* | mingw* | pw32* | cegcc*)
+	    case $realname in
+	    *.dll.a)
+	      tstripme=
+	      ;;
+	    esac
+	    ;;
+	  os2*)
+	    case $realname in
+	    *_dll.a)
+	      tstripme=
+	      ;;
+	    esac
+	    ;;
+	  esac
+	  if test -n "$tstripme" && test -n "$striplib"; then
+	    func_show_eval "$striplib $destdir/$realname" 'exit $?'
+	  fi
+
+	  if test "$#" -gt 0; then
+	    # Delete the old symlinks, and create new ones.
+	    # Try 'ln -sf' first, because the 'ln' binary might depend on
+	    # the symlink we replace!  Solaris /bin/ln does not understand -f,
+	    # so we also need to try rm && ln -s.
+	    for linkname
+	    do
+	      test "$linkname" != "$realname" \
+		&& func_show_eval "(cd $destdir && { $LN_S -f $realname $linkname || { $RM $linkname && $LN_S $realname $linkname; }; })"
+	    done
+	  fi
+
+	  # Do each command in the postinstall commands.
+	  lib=$destdir/$realname
+	  func_execute_cmds "$postinstall_cmds" 'exit $?'
+	fi
+
+	# Install the pseudo-library for information purposes.
+	func_basename "$file"
+	name=$func_basename_result
+	instname=$dir/${name}i
+	func_show_eval "$install_prog $instname $destdir/$name" 'exit $?'
+
+	# Maybe install the static library, too.
+	test -n "$old_library" && func_append staticlibs " $dir/$old_library"
+	;;
+
+      *.lo)
+	# Install (i.e. copy) a libtool object.
+
+	# Figure out destination file name, if it wasn't already specified.
+	if test -n "$destname"; then
+	  destfile=$destdir/$destname
+	else
+	  func_basename "$file"
+	  destfile=$func_basename_result
+	  destfile=$destdir/$destfile
+	fi
+
+	# Deduce the name of the destination old-style object file.
+	case $destfile in
+	*.lo)
+	  func_lo2o "$destfile"
+	  staticdest=$func_lo2o_result
+	  ;;
+	*.$objext)
+	  staticdest=$destfile
+	  destfile=
+	  ;;
+	*)
+	  func_fatal_help "cannot copy a libtool object to '$destfile'"
+	  ;;
+	esac
+
+	# Install the libtool object if requested.
+	test -n "$destfile" && \
+	  func_show_eval "$install_prog $file $destfile" 'exit $?'
+
+	# Install the old object if enabled.
+	if test yes = "$build_old_libs"; then
+	  # Deduce the name of the old-style object file.
+	  func_lo2o "$file"
+	  staticobj=$func_lo2o_result
+	  func_show_eval "$install_prog \$staticobj \$staticdest" 'exit $?'
+	fi
+	exit $EXIT_SUCCESS
+	;;
+
+      *)
+	# Figure out destination file name, if it wasn't already specified.
+	if test -n "$destname"; then
+	  destfile=$destdir/$destname
+	else
+	  func_basename "$file"
+	  destfile=$func_basename_result
+	  destfile=$destdir/$destfile
+	fi
+
+	# If the file is missing, and there is a .exe on the end, strip it
+	# because it is most likely a libtool script we actually want to
+	# install
+	stripped_ext=
+	case $file in
+	  *.exe)
+	    if test ! -f "$file"; then
+	      func_stripname '' '.exe' "$file"
+	      file=$func_stripname_result
+	      stripped_ext=.exe
+	    fi
+	    ;;
+	esac
+
+	# Do a test to see if this is really a libtool program.
+	case $host in
+	*cygwin* | *mingw*)
+	    if func_ltwrapper_executable_p "$file"; then
+	      func_ltwrapper_scriptname "$file"
+	      wrapper=$func_ltwrapper_scriptname_result
+	    else
+	      func_stripname '' '.exe' "$file"
+	      wrapper=$func_stripname_result
+	    fi
+	    ;;
+	*)
+	    wrapper=$file
+	    ;;
+	esac
+	if func_ltwrapper_script_p "$wrapper"; then
+	  notinst_deplibs=
+	  relink_command=
+
+	  func_source "$wrapper"
+
+	  # Check the variables that should have been set.
+	  test -z "$generated_by_libtool_version" && \
+	    func_fatal_error "invalid libtool wrapper script '$wrapper'"
+
+	  finalize=:
+	  for lib in $notinst_deplibs; do
+	    # Check to see that each library is installed.
+	    libdir=
+	    if test -f "$lib"; then
+	      func_source "$lib"
+	    fi
+	    libfile=$libdir/`$ECHO "$lib" | $SED 's%^.*/%%g'`
+	    if test -n "$libdir" && test ! -f "$libfile"; then
+	      func_warning "'$lib' has not been installed in '$libdir'"
+	      finalize=false
+	    fi
+	  done
+
+	  relink_command=
+	  func_source "$wrapper"
+
+	  outputname=
+	  if test no = "$fast_install" && test -n "$relink_command"; then
+	    $opt_dry_run || {
+	      if $finalize; then
+	        tmpdir=`func_mktempdir`
+		func_basename "$file$stripped_ext"
+		file=$func_basename_result
+	        outputname=$tmpdir/$file
+	        # Replace the output file specification.
+	        relink_command=`$ECHO "$relink_command" | $SED 's%@OUTPUT@%'"$outputname"'%g'`
+
+	        $opt_quiet || {
+	          func_quote_for_expand "$relink_command"
+		  eval "func_echo $func_quote_for_expand_result"
+	        }
+	        if eval "$relink_command"; then :
+	          else
+		  func_error "error: relink '$file' with the above command before installing it"
+		  $opt_dry_run || ${RM}r "$tmpdir"
+		  continue
+	        fi
+	        file=$outputname
+	      else
+	        func_warning "cannot relink '$file'"
+	      fi
+	    }
+	  else
+	    # Install the binary that we compiled earlier.
+	    file=`$ECHO "$file$stripped_ext" | $SED "s%\([^/]*\)$%$objdir/\1%"`
+	  fi
+	fi
+
+	# remove .exe since cygwin /usr/bin/install will append another
+	# one anyway
+	case $install_prog,$host in
+	*/usr/bin/install*,*cygwin*)
+	  case $file:$destfile in
+	  *.exe:*.exe)
+	    # this is ok
+	    ;;
+	  *.exe:*)
+	    destfile=$destfile.exe
+	    ;;
+	  *:*.exe)
+	    func_stripname '' '.exe' "$destfile"
+	    destfile=$func_stripname_result
+	    ;;
+	  esac
+	  ;;
+	esac
+	func_show_eval "$install_prog\$stripme \$file \$destfile" 'exit $?'
+	$opt_dry_run || if test -n "$outputname"; then
+	  ${RM}r "$tmpdir"
+	fi
+	;;
+      esac
+    done
+
+    for file in $staticlibs; do
+      func_basename "$file"
+      name=$func_basename_result
+
+      # Set up the ranlib parameters.
+      oldlib=$destdir/$name
+      func_to_tool_file "$oldlib" func_convert_file_msys_to_w32
+      tool_oldlib=$func_to_tool_file_result
+
+      func_show_eval "$install_prog \$file \$oldlib" 'exit $?'
+
+      if test -n "$stripme" && test -n "$old_striplib"; then
+	func_show_eval "$old_striplib $tool_oldlib" 'exit $?'
+      fi
+
+      # Do each command in the postinstall commands.
+      func_execute_cmds "$old_postinstall_cmds" 'exit $?'
+    done
+
+    test -n "$future_libdirs" && \
+      func_warning "remember to run '$progname --finish$future_libdirs'"
+
+    if test -n "$current_libdirs"; then
+      # Maybe just do a dry run.
+      $opt_dry_run && current_libdirs=" -n$current_libdirs"
+      exec_cmd='$SHELL "$progpath" $preserve_args --finish$current_libdirs'
+    else
+      exit $EXIT_SUCCESS
+    fi
+}
+
+test install = "$opt_mode" && func_mode_install ${1+"$@"}
+
+
+# func_generate_dlsyms outputname originator pic_p
+# Extract symbols from dlprefiles and create ${outputname}S.o with
+# a dlpreopen symbol table.
+func_generate_dlsyms ()
+{
+    $debug_cmd
+
+    my_outputname=$1
+    my_originator=$2
+    my_pic_p=${3-false}
+    my_prefix=`$ECHO "$my_originator" | $SED 's%[^a-zA-Z0-9]%_%g'`
+    my_dlsyms=
+
+    if test -n "$dlfiles$dlprefiles" || test no != "$dlself"; then
+      if test -n "$NM" && test -n "$global_symbol_pipe"; then
+	my_dlsyms=${my_outputname}S.c
+      else
+	func_error "not configured to extract global symbols from dlpreopened files"
+      fi
+    fi
+
+    if test -n "$my_dlsyms"; then
+      case $my_dlsyms in
+      "") ;;
+      *.c)
+	# Discover the nlist of each of the dlfiles.
+	nlist=$output_objdir/$my_outputname.nm
+
+	func_show_eval "$RM $nlist ${nlist}S ${nlist}T"
+
+	# Parse the name list into a source file.
+	func_verbose "creating $output_objdir/$my_dlsyms"
+
+	$opt_dry_run || $ECHO > "$output_objdir/$my_dlsyms" "\
+/* $my_dlsyms - symbol resolution table for '$my_outputname' dlsym emulation. */
+/* Generated by $PROGRAM (GNU $PACKAGE) $VERSION */
+
+#ifdef __cplusplus
+extern \"C\" {
+#endif
+
+#if defined __GNUC__ && (((__GNUC__ == 4) && (__GNUC_MINOR__ >= 4)) || (__GNUC__ > 4))
+#pragma GCC diagnostic ignored \"-Wstrict-prototypes\"
+#endif
+
+/* Keep this code in sync between libtool.m4, ltmain, lt_system.h, and tests.  */
+#if defined _WIN32 || defined __CYGWIN__ || defined _WIN32_WCE
+/* DATA imports from DLLs on WIN32 can't be const, because runtime
+   relocations are performed -- see ld's documentation on pseudo-relocs.  */
+# define LT_DLSYM_CONST
+#elif defined __osf__
+/* This system does not cope well with relocations in const data.  */
+# define LT_DLSYM_CONST
+#else
+# define LT_DLSYM_CONST const
+#endif
+
+#define STREQ(s1, s2) (strcmp ((s1), (s2)) == 0)
+
+/* External symbol declarations for the compiler. */\
+"
+
+	if test yes = "$dlself"; then
+	  func_verbose "generating symbol list for '$output'"
+
+	  $opt_dry_run || echo ': @PROGRAM@ ' > "$nlist"
+
+	  # Add our own program objects to the symbol list.
+	  progfiles=`$ECHO "$objs$old_deplibs" | $SP2NL | $SED "$lo2o" | $NL2SP`
+	  for progfile in $progfiles; do
+	    func_to_tool_file "$progfile" func_convert_file_msys_to_w32
+	    func_verbose "extracting global C symbols from '$func_to_tool_file_result'"
+	    $opt_dry_run || eval "$NM $func_to_tool_file_result | $global_symbol_pipe >> '$nlist'"
+	  done
+
+	  if test -n "$exclude_expsyms"; then
+	    $opt_dry_run || {
+	      eval '$EGREP -v " ($exclude_expsyms)$" "$nlist" > "$nlist"T'
+	      eval '$MV "$nlist"T "$nlist"'
+	    }
+	  fi
+
+	  if test -n "$export_symbols_regex"; then
+	    $opt_dry_run || {
+	      eval '$EGREP -e "$export_symbols_regex" "$nlist" > "$nlist"T'
+	      eval '$MV "$nlist"T "$nlist"'
+	    }
+	  fi
+
+	  # Prepare the list of exported symbols
+	  if test -z "$export_symbols"; then
+	    export_symbols=$output_objdir/$outputname.exp
+	    $opt_dry_run || {
+	      $RM $export_symbols
+	      eval "$SED -n -e '/^: @PROGRAM@ $/d' -e 's/^.* \(.*\)$/\1/p' "'< "$nlist" > "$export_symbols"'
+	      case $host in
+	      *cygwin* | *mingw* | *cegcc* )
+                eval "echo EXPORTS "'> "$output_objdir/$outputname.def"'
+                eval 'cat "$export_symbols" >> "$output_objdir/$outputname.def"'
+	        ;;
+	      esac
+	    }
+	  else
+	    $opt_dry_run || {
+	      eval "$SED -e 's/\([].[*^$]\)/\\\\\1/g' -e 's/^/ /' -e 's/$/$/'"' < "$export_symbols" > "$output_objdir/$outputname.exp"'
+	      eval '$GREP -f "$output_objdir/$outputname.exp" < "$nlist" > "$nlist"T'
+	      eval '$MV "$nlist"T "$nlist"'
+	      case $host in
+	        *cygwin* | *mingw* | *cegcc* )
+	          eval "echo EXPORTS "'> "$output_objdir/$outputname.def"'
+	          eval 'cat "$nlist" >> "$output_objdir/$outputname.def"'
+	          ;;
+	      esac
+	    }
+	  fi
+	fi
+
+	for dlprefile in $dlprefiles; do
+	  func_verbose "extracting global C symbols from '$dlprefile'"
+	  func_basename "$dlprefile"
+	  name=$func_basename_result
+          case $host in
+	    *cygwin* | *mingw* | *cegcc* )
+	      # if an import library, we need to obtain dlname
+	      if func_win32_import_lib_p "$dlprefile"; then
+	        func_tr_sh "$dlprefile"
+	        eval "curr_lafile=\$libfile_$func_tr_sh_result"
+	        dlprefile_dlbasename=
+	        if test -n "$curr_lafile" && func_lalib_p "$curr_lafile"; then
+	          # Use subshell, to avoid clobbering current variable values
+	          dlprefile_dlname=`source "$curr_lafile" && echo "$dlname"`
+	          if test -n "$dlprefile_dlname"; then
+	            func_basename "$dlprefile_dlname"
+	            dlprefile_dlbasename=$func_basename_result
+	          else
+	            # no lafile. user explicitly requested -dlpreopen <import library>.
+	            $sharedlib_from_linklib_cmd "$dlprefile"
+	            dlprefile_dlbasename=$sharedlib_from_linklib_result
+	          fi
+	        fi
+	        $opt_dry_run || {
+	          if test -n "$dlprefile_dlbasename"; then
+	            eval '$ECHO ": $dlprefile_dlbasename" >> "$nlist"'
+	          else
+	            func_warning "Could not compute DLL name from $name"
+	            eval '$ECHO ": $name " >> "$nlist"'
+	          fi
+	          func_to_tool_file "$dlprefile" func_convert_file_msys_to_w32
+	          eval "$NM \"$func_to_tool_file_result\" 2>/dev/null | $global_symbol_pipe |
+	            $SED -e '/I __imp/d' -e 's/I __nm_/D /;s/_nm__//' >> '$nlist'"
+	        }
+	      else # not an import lib
+	        $opt_dry_run || {
+	          eval '$ECHO ": $name " >> "$nlist"'
+	          func_to_tool_file "$dlprefile" func_convert_file_msys_to_w32
+	          eval "$NM \"$func_to_tool_file_result\" 2>/dev/null | $global_symbol_pipe >> '$nlist'"
+	        }
+	      fi
+	    ;;
+	    *)
+	      $opt_dry_run || {
+	        eval '$ECHO ": $name " >> "$nlist"'
+	        func_to_tool_file "$dlprefile" func_convert_file_msys_to_w32
+	        eval "$NM \"$func_to_tool_file_result\" 2>/dev/null | $global_symbol_pipe >> '$nlist'"
+	      }
+	    ;;
+          esac
+	done
+
+	$opt_dry_run || {
+	  # Make sure we have at least an empty file.
+	  test -f "$nlist" || : > "$nlist"
+
+	  if test -n "$exclude_expsyms"; then
+	    $EGREP -v " ($exclude_expsyms)$" "$nlist" > "$nlist"T
+	    $MV "$nlist"T "$nlist"
+	  fi
+
+	  # Try sorting and uniquifying the output.
+	  if $GREP -v "^: " < "$nlist" |
+	      if sort -k 3 </dev/null >/dev/null 2>&1; then
+		sort -k 3
+	      else
+		sort +2
+	      fi |
+	      uniq > "$nlist"S; then
+	    :
+	  else
+	    $GREP -v "^: " < "$nlist" > "$nlist"S
+	  fi
+
+	  if test -f "$nlist"S; then
+	    eval "$global_symbol_to_cdecl"' < "$nlist"S >> "$output_objdir/$my_dlsyms"'
+	  else
+	    echo '/* NONE */' >> "$output_objdir/$my_dlsyms"
+	  fi
+
+	  func_show_eval '$RM "${nlist}I"'
+	  if test -n "$global_symbol_to_import"; then
+	    eval "$global_symbol_to_import"' < "$nlist"S > "$nlist"I'
+	  fi
+
+	  echo >> "$output_objdir/$my_dlsyms" "\
+
+/* The mapping between symbol names and symbols.  */
+typedef struct {
+  const char *name;
+  void *address;
+} lt_dlsymlist;
+extern LT_DLSYM_CONST lt_dlsymlist
+lt_${my_prefix}_LTX_preloaded_symbols[];\
+"
+
+	  if test -s "$nlist"I; then
+	    echo >> "$output_objdir/$my_dlsyms" "\
+static void lt_syminit(void)
+{
+  LT_DLSYM_CONST lt_dlsymlist *symbol = lt_${my_prefix}_LTX_preloaded_symbols;
+  for (; symbol->name; ++symbol)
+    {"
+	    $SED 's/.*/      if (STREQ (symbol->name, \"&\")) symbol->address = (void *) \&&;/' < "$nlist"I >> "$output_objdir/$my_dlsyms"
+	    echo >> "$output_objdir/$my_dlsyms" "\
+    }
+}"
+	  fi
+	  echo >> "$output_objdir/$my_dlsyms" "\
+LT_DLSYM_CONST lt_dlsymlist
+lt_${my_prefix}_LTX_preloaded_symbols[] =
+{ {\"$my_originator\", (void *) 0},"
+
+	  if test -s "$nlist"I; then
+	    echo >> "$output_objdir/$my_dlsyms" "\
+  {\"@INIT@\", (void *) &lt_syminit},"
+	  fi
+
+	  case $need_lib_prefix in
+	  no)
+	    eval "$global_symbol_to_c_name_address" < "$nlist" >> "$output_objdir/$my_dlsyms"
+	    ;;
+	  *)
+	    eval "$global_symbol_to_c_name_address_lib_prefix" < "$nlist" >> "$output_objdir/$my_dlsyms"
+	    ;;
+	  esac
+	  echo >> "$output_objdir/$my_dlsyms" "\
+  {0, (void *) 0}
+};
+
+/* This works around a problem in FreeBSD linker */
+#ifdef FREEBSD_WORKAROUND
+static const void *lt_preloaded_setup() {
+  return lt_${my_prefix}_LTX_preloaded_symbols;
+}
+#endif
+
+#ifdef __cplusplus
+}
+#endif\
+"
+	} # !$opt_dry_run
+
+	pic_flag_for_symtable=
+	case "$compile_command " in
+	*" -static "*) ;;
+	*)
+	  case $host in
+	  # compiling the symbol table file with pic_flag works around
+	  # a FreeBSD bug that causes programs to crash when -lm is
+	  # linked before any other PIC object.  But we must not use
+	  # pic_flag when linking with -static.  The problem exists in
+	  # FreeBSD 2.2.6 and is fixed in FreeBSD 3.1.
+	  *-*-freebsd2.*|*-*-freebsd3.0*|*-*-freebsdelf3.0*)
+	    pic_flag_for_symtable=" $pic_flag -DFREEBSD_WORKAROUND" ;;
+	  *-*-hpux*)
+	    pic_flag_for_symtable=" $pic_flag"  ;;
+	  *)
+	    $my_pic_p && pic_flag_for_symtable=" $pic_flag"
+	    ;;
+	  esac
+	  ;;
+	esac
+	symtab_cflags=
+	for arg in $LTCFLAGS; do
+	  case $arg in
+	  -pie | -fpie | -fPIE) ;;
+	  *) func_append symtab_cflags " $arg" ;;
+	  esac
+	done
+
+	# Now compile the dynamic symbol file.
+	func_show_eval '(cd $output_objdir && $LTCC$symtab_cflags -c$no_builtin_flag$pic_flag_for_symtable "$my_dlsyms")' 'exit $?'
+
+	# Clean up the generated files.
+	func_show_eval '$RM "$output_objdir/$my_dlsyms" "$nlist" "${nlist}S" "${nlist}T" "${nlist}I"'
+
+	# Transform the symbol file into the correct name.
+	symfileobj=$output_objdir/${my_outputname}S.$objext
+	case $host in
+	*cygwin* | *mingw* | *cegcc* )
+	  if test -f "$output_objdir/$my_outputname.def"; then
+	    compile_command=`$ECHO "$compile_command" | $SED "s%@SYMFILE@%$output_objdir/$my_outputname.def $symfileobj%"`
+	    finalize_command=`$ECHO "$finalize_command" | $SED "s%@SYMFILE@%$output_objdir/$my_outputname.def $symfileobj%"`
+	  else
+	    compile_command=`$ECHO "$compile_command" | $SED "s%@SYMFILE@%$symfileobj%"`
+	    finalize_command=`$ECHO "$finalize_command" | $SED "s%@SYMFILE@%$symfileobj%"`
+	  fi
+	  ;;
+	*)
+	  compile_command=`$ECHO "$compile_command" | $SED "s%@SYMFILE@%$symfileobj%"`
+	  finalize_command=`$ECHO "$finalize_command" | $SED "s%@SYMFILE@%$symfileobj%"`
+	  ;;
+	esac
+	;;
+      *)
+	func_fatal_error "unknown suffix for '$my_dlsyms'"
+	;;
+      esac
+    else
+      # We keep going just in case the user didn't refer to
+      # lt_preloaded_symbols.  The linker will fail if global_symbol_pipe
+      # really was required.
+
+      # Nullify the symbol file.
+      compile_command=`$ECHO "$compile_command" | $SED "s% @SYMFILE@%%"`
+      finalize_command=`$ECHO "$finalize_command" | $SED "s% @SYMFILE@%%"`
+    fi
+}
+
+# func_cygming_gnu_implib_p ARG
+# This predicate returns with zero status (TRUE) if
+# ARG is a GNU/binutils-style import library. Returns
+# with nonzero status (FALSE) otherwise.
+func_cygming_gnu_implib_p ()
+{
+  $debug_cmd
+
+  func_to_tool_file "$1" func_convert_file_msys_to_w32
+  func_cygming_gnu_implib_tmp=`$NM "$func_to_tool_file_result" | eval "$global_symbol_pipe" | $EGREP ' (_head_[A-Za-z0-9_]+_[ad]l*|[A-Za-z0-9_]+_[ad]l*_iname)$'`
+  test -n "$func_cygming_gnu_implib_tmp"
+}
+
+# func_cygming_ms_implib_p ARG
+# This predicate returns with zero status (TRUE) if
+# ARG is an MS-style import library. Returns
+# with nonzero status (FALSE) otherwise.
+func_cygming_ms_implib_p ()
+{
+  $debug_cmd
+
+  func_to_tool_file "$1" func_convert_file_msys_to_w32
+  func_cygming_ms_implib_tmp=`$NM "$func_to_tool_file_result" | eval "$global_symbol_pipe" | $GREP '_NULL_IMPORT_DESCRIPTOR'`
+  test -n "$func_cygming_ms_implib_tmp"
+}
+
+# func_win32_libid arg
+# return the library type of file 'arg'
+#
+# Need a lot of goo to handle *both* DLLs and import libs
+# Has to be a shell function in order to 'eat' the argument
+# that is supplied when $file_magic_command is called.
+# Despite the name, also deal with 64 bit binaries.
+func_win32_libid ()
+{
+  $debug_cmd
+
+  win32_libid_type=unknown
+  win32_fileres=`file -L $1 2>/dev/null`
+  case $win32_fileres in
+  *ar\ archive\ import\ library*) # definitely import
+    win32_libid_type="x86 archive import"
+    ;;
+  *ar\ archive*) # could be an import, or static
+    # Keep the egrep pattern in sync with the one in _LT_CHECK_MAGIC_METHOD.
+    if eval $OBJDUMP -f $1 | $SED -e '10q' 2>/dev/null |
+       $EGREP 'file format (pei*-i386(.*architecture: i386)?|pe-arm-wince|pe-x86-64)' >/dev/null; then
+      case $nm_interface in
+      "MS dumpbin")
+	if func_cygming_ms_implib_p "$1" ||
+	   func_cygming_gnu_implib_p "$1"
+	then
+	  win32_nmres=import
+	else
+	  win32_nmres=
+	fi
+	;;
+      *)
+	func_to_tool_file "$1" func_convert_file_msys_to_w32
+	win32_nmres=`eval $NM -f posix -A \"$func_to_tool_file_result\" |
+	  $SED -n -e '
+	    1,100{
+		/ I /{
+		    s|.*|import|
+		    p
+		    q
+		}
+	    }'`
+	;;
+      esac
+      case $win32_nmres in
+      import*)  win32_libid_type="x86 archive import";;
+      *)        win32_libid_type="x86 archive static";;
+      esac
+    fi
+    ;;
+  *DLL*)
+    win32_libid_type="x86 DLL"
+    ;;
+  *executable*) # but shell scripts are "executable" too...
+    case $win32_fileres in
+    *MS\ Windows\ PE\ Intel*)
+      win32_libid_type="x86 DLL"
+      ;;
+    esac
+    ;;
+  esac
+  $ECHO "$win32_libid_type"
+}
+
+# func_cygming_dll_for_implib ARG
+#
+# Platform-specific function to extract the
+# name of the DLL associated with the specified
+# import library ARG.
+# Invoked by eval'ing the libtool variable
+#    $sharedlib_from_linklib_cmd
+# Result is available in the variable
+#    $sharedlib_from_linklib_result
+func_cygming_dll_for_implib ()
+{
+  $debug_cmd
+
+  sharedlib_from_linklib_result=`$DLLTOOL --identify-strict --identify "$1"`
+}
+
+# func_cygming_dll_for_implib_fallback_core SECTION_NAME LIBNAMEs
+#
+# The is the core of a fallback implementation of a
+# platform-specific function to extract the name of the
+# DLL associated with the specified import library LIBNAME.
+#
+# SECTION_NAME is either .idata$6 or .idata$7, depending
+# on the platform and compiler that created the implib.
+#
+# Echos the name of the DLL associated with the
+# specified import library.
+func_cygming_dll_for_implib_fallback_core ()
+{
+  $debug_cmd
+
+  match_literal=`$ECHO "$1" | $SED "$sed_make_literal_regex"`
+  $OBJDUMP -s --section "$1" "$2" 2>/dev/null |
+    $SED '/^Contents of section '"$match_literal"':/{
+      # Place marker at beginning of archive member dllname section
+      s/.*/====MARK====/
+      p
+      d
+    }
+    # These lines can sometimes be longer than 43 characters, but
+    # are always uninteresting
+    /:[	 ]*file format pe[i]\{,1\}-/d
+    /^In archive [^:]*:/d
+    # Ensure marker is printed
+    /^====MARK====/p
+    # Remove all lines with less than 43 characters
+    /^.\{43\}/!d
+    # From remaining lines, remove first 43 characters
+    s/^.\{43\}//' |
+    $SED -n '
+      # Join marker and all lines until next marker into a single line
+      /^====MARK====/ b para
+      H
+      $ b para
+      b
+      :para
+      x
+      s/\n//g
+      # Remove the marker
+      s/^====MARK====//
+      # Remove trailing dots and whitespace
+      s/[\. \t]*$//
+      # Print
+      /./p' |
+    # we now have a list, one entry per line, of the stringified
+    # contents of the appropriate section of all members of the
+    # archive that possess that section. Heuristic: eliminate
+    # all those that have a first or second character that is
+    # a '.' (that is, objdump's representation of an unprintable
+    # character.) This should work for all archives with less than
+    # 0x302f exports -- but will fail for DLLs whose name actually
+    # begins with a literal '.' or a single character followed by
+    # a '.'.
+    #
+    # Of those that remain, print the first one.
+    $SED -e '/^\./d;/^.\./d;q'
+}
+
+# func_cygming_dll_for_implib_fallback ARG
+# Platform-specific function to extract the
+# name of the DLL associated with the specified
+# import library ARG.
+#
+# This fallback implementation is for use when $DLLTOOL
+# does not support the --identify-strict option.
+# Invoked by eval'ing the libtool variable
+#    $sharedlib_from_linklib_cmd
+# Result is available in the variable
+#    $sharedlib_from_linklib_result
+func_cygming_dll_for_implib_fallback ()
+{
+  $debug_cmd
+
+  if func_cygming_gnu_implib_p "$1"; then
+    # binutils import library
+    sharedlib_from_linklib_result=`func_cygming_dll_for_implib_fallback_core '.idata$7' "$1"`
+  elif func_cygming_ms_implib_p "$1"; then
+    # ms-generated import library
+    sharedlib_from_linklib_result=`func_cygming_dll_for_implib_fallback_core '.idata$6' "$1"`
+  else
+    # unknown
+    sharedlib_from_linklib_result=
+  fi
+}
+
+
+# func_extract_an_archive dir oldlib
+func_extract_an_archive ()
+{
+    $debug_cmd
+
+    f_ex_an_ar_dir=$1; shift
+    f_ex_an_ar_oldlib=$1
+    if test yes = "$lock_old_archive_extraction"; then
+      lockfile=$f_ex_an_ar_oldlib.lock
+      until $opt_dry_run || ln "$progpath" "$lockfile" 2>/dev/null; do
+	func_echo "Waiting for $lockfile to be removed"
+	sleep 2
+      done
+    fi
+    func_show_eval "(cd \$f_ex_an_ar_dir && $AR x \"\$f_ex_an_ar_oldlib\")" \
+		   'stat=$?; rm -f "$lockfile"; exit $stat'
+    if test yes = "$lock_old_archive_extraction"; then
+      $opt_dry_run || rm -f "$lockfile"
+    fi
+    if ($AR t "$f_ex_an_ar_oldlib" | sort | sort -uc >/dev/null 2>&1); then
+     :
+    else
+      func_fatal_error "object name conflicts in archive: $f_ex_an_ar_dir/$f_ex_an_ar_oldlib"
+    fi
+}
+
+
+# func_extract_archives gentop oldlib ...
+func_extract_archives ()
+{
+    $debug_cmd
+
+    my_gentop=$1; shift
+    my_oldlibs=${1+"$@"}
+    my_oldobjs=
+    my_xlib=
+    my_xabs=
+    my_xdir=
+
+    for my_xlib in $my_oldlibs; do
+      # Extract the objects.
+      case $my_xlib in
+	[\\/]* | [A-Za-z]:[\\/]*) my_xabs=$my_xlib ;;
+	*) my_xabs=`pwd`"/$my_xlib" ;;
+      esac
+      func_basename "$my_xlib"
+      my_xlib=$func_basename_result
+      my_xlib_u=$my_xlib
+      while :; do
+        case " $extracted_archives " in
+	*" $my_xlib_u "*)
+	  func_arith $extracted_serial + 1
+	  extracted_serial=$func_arith_result
+	  my_xlib_u=lt$extracted_serial-$my_xlib ;;
+	*) break ;;
+	esac
+      done
+      extracted_archives="$extracted_archives $my_xlib_u"
+      my_xdir=$my_gentop/$my_xlib_u
+
+      func_mkdir_p "$my_xdir"
+
+      case $host in
+      *-darwin*)
+	func_verbose "Extracting $my_xabs"
+	# Do not bother doing anything if just a dry run
+	$opt_dry_run || {
+	  darwin_orig_dir=`pwd`
+	  cd $my_xdir || exit $?
+	  darwin_archive=$my_xabs
+	  darwin_curdir=`pwd`
+	  func_basename "$darwin_archive"
+	  darwin_base_archive=$func_basename_result
+	  darwin_arches=`$LIPO -info "$darwin_archive" 2>/dev/null | $GREP Architectures 2>/dev/null || true`
+	  if test -n "$darwin_arches"; then
+	    darwin_arches=`$ECHO "$darwin_arches" | $SED -e 's/.*are://'`
+	    darwin_arch=
+	    func_verbose "$darwin_base_archive has multiple architectures $darwin_arches"
+	    for darwin_arch in  $darwin_arches; do
+	      func_mkdir_p "unfat-$$/$darwin_base_archive-$darwin_arch"
+	      $LIPO -thin $darwin_arch -output "unfat-$$/$darwin_base_archive-$darwin_arch/$darwin_base_archive" "$darwin_archive"
+	      cd "unfat-$$/$darwin_base_archive-$darwin_arch"
+	      func_extract_an_archive "`pwd`" "$darwin_base_archive"
+	      cd "$darwin_curdir"
+	      $RM "unfat-$$/$darwin_base_archive-$darwin_arch/$darwin_base_archive"
+	    done # $darwin_arches
+            ## Okay now we've a bunch of thin objects, gotta fatten them up :)
+	    darwin_filelist=`find unfat-$$ -type f -name \*.o -print -o -name \*.lo -print | $SED -e "$sed_basename" | sort -u`
+	    darwin_file=
+	    darwin_files=
+	    for darwin_file in $darwin_filelist; do
+	      darwin_files=`find unfat-$$ -name $darwin_file -print | sort | $NL2SP`
+	      $LIPO -create -output "$darwin_file" $darwin_files
+	    done # $darwin_filelist
+	    $RM -rf unfat-$$
+	    cd "$darwin_orig_dir"
+	  else
+	    cd $darwin_orig_dir
+	    func_extract_an_archive "$my_xdir" "$my_xabs"
+	  fi # $darwin_arches
+	} # !$opt_dry_run
+	;;
+      *)
+        func_extract_an_archive "$my_xdir" "$my_xabs"
+	;;
+      esac
+      my_oldobjs="$my_oldobjs "`find $my_xdir -name \*.$objext -print -o -name \*.lo -print | sort | $NL2SP`
+    done
+
+    func_extract_archives_result=$my_oldobjs
+}
+
+
+# func_emit_wrapper [arg=no]
+#
+# Emit a libtool wrapper script on stdout.
+# Don't directly open a file because we may want to
+# incorporate the script contents within a cygwin/mingw
+# wrapper executable.  Must ONLY be called from within
+# func_mode_link because it depends on a number of variables
+# set therein.
+#
+# ARG is the value that the WRAPPER_SCRIPT_BELONGS_IN_OBJDIR
+# variable will take.  If 'yes', then the emitted script
+# will assume that the directory where it is stored is
+# the $objdir directory.  This is a cygwin/mingw-specific
+# behavior.
+func_emit_wrapper ()
+{
+	func_emit_wrapper_arg1=${1-no}
+
+	$ECHO "\
+#! $SHELL
+
+# $output - temporary wrapper script for $objdir/$outputname
+# Generated by $PROGRAM (GNU $PACKAGE) $VERSION
+#
+# The $output program cannot be directly executed until all the libtool
+# libraries that it depends on are installed.
+#
+# This wrapper script should never be moved out of the build directory.
+# If it is, it will not operate correctly.
+
+# Sed substitution that helps us do robust quoting.  It backslashifies
+# metacharacters that are still active within double-quoted strings.
+sed_quote_subst='$sed_quote_subst'
+
+# Be Bourne compatible
+if test -n \"\${ZSH_VERSION+set}\" && (emulate sh) >/dev/null 2>&1; then
+  emulate sh
+  NULLCMD=:
+  # Zsh 3.x and 4.x performs word splitting on \${1+\"\$@\"}, which
+  # is contrary to our usage.  Disable this feature.
+  alias -g '\${1+\"\$@\"}'='\"\$@\"'
+  setopt NO_GLOB_SUBST
+else
+  case \`(set -o) 2>/dev/null\` in *posix*) set -o posix;; esac
+fi
+BIN_SH=xpg4; export BIN_SH # for Tru64
+DUALCASE=1; export DUALCASE # for MKS sh
+
+# The HP-UX ksh and POSIX shell print the target directory to stdout
+# if CDPATH is set.
+(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
+
+relink_command=\"$relink_command\"
+
+# This environment variable determines our operation mode.
+if test \"\$libtool_install_magic\" = \"$magic\"; then
+  # install mode needs the following variables:
+  generated_by_libtool_version='$macro_version'
+  notinst_deplibs='$notinst_deplibs'
+else
+  # When we are sourced in execute mode, \$file and \$ECHO are already set.
+  if test \"\$libtool_execute_magic\" != \"$magic\"; then
+    file=\"\$0\""
+
+    qECHO=`$ECHO "$ECHO" | $SED "$sed_quote_subst"`
+    $ECHO "\
+
+# A function that is used when there is no print builtin or printf.
+func_fallback_echo ()
+{
+  eval 'cat <<_LTECHO_EOF
+\$1
+_LTECHO_EOF'
+}
+    ECHO=\"$qECHO\"
+  fi
+
+# Very basic option parsing. These options are (a) specific to
+# the libtool wrapper, (b) are identical between the wrapper
+# /script/ and the wrapper /executable/ that is used only on
+# windows platforms, and (c) all begin with the string "--lt-"
+# (application programs are unlikely to have options that match
+# this pattern).
+#
+# There are only two supported options: --lt-debug and
+# --lt-dump-script. There is, deliberately, no --lt-help.
+#
+# The first argument to this parsing function should be the
+# script's $0 value, followed by "$@".
+lt_option_debug=
+func_parse_lt_options ()
+{
+  lt_script_arg0=\$0
+  shift
+  for lt_opt
+  do
+    case \"\$lt_opt\" in
+    --lt-debug) lt_option_debug=1 ;;
+    --lt-dump-script)
+        lt_dump_D=\`\$ECHO \"X\$lt_script_arg0\" | $SED -e 's/^X//' -e 's%/[^/]*$%%'\`
+        test \"X\$lt_dump_D\" = \"X\$lt_script_arg0\" && lt_dump_D=.
+        lt_dump_F=\`\$ECHO \"X\$lt_script_arg0\" | $SED -e 's/^X//' -e 's%^.*/%%'\`
+        cat \"\$lt_dump_D/\$lt_dump_F\"
+        exit 0
+      ;;
+    --lt-*)
+        \$ECHO \"Unrecognized --lt- option: '\$lt_opt'\" 1>&2
+        exit 1
+      ;;
+    esac
+  done
+
+  # Print the debug banner immediately:
+  if test -n \"\$lt_option_debug\"; then
+    echo \"$outputname:$output:\$LINENO: libtool wrapper (GNU $PACKAGE) $VERSION\" 1>&2
+  fi
+}
+
+# Used when --lt-debug. Prints its arguments to stdout
+# (redirection is the responsibility of the caller)
+func_lt_dump_args ()
+{
+  lt_dump_args_N=1;
+  for lt_arg
+  do
+    \$ECHO \"$outputname:$output:\$LINENO: newargv[\$lt_dump_args_N]: \$lt_arg\"
+    lt_dump_args_N=\`expr \$lt_dump_args_N + 1\`
+  done
+}
+
+# Core function for launching the target application
+func_exec_program_core ()
+{
+"
+  case $host in
+  # Backslashes separate directories on plain windows
+  *-*-mingw | *-*-os2* | *-cegcc*)
+    $ECHO "\
+      if test -n \"\$lt_option_debug\"; then
+        \$ECHO \"$outputname:$output:\$LINENO: newargv[0]: \$progdir\\\\\$program\" 1>&2
+        func_lt_dump_args \${1+\"\$@\"} 1>&2
+      fi
+      exec \"\$progdir\\\\\$program\" \${1+\"\$@\"}
+"
+    ;;
+
+  *)
+    $ECHO "\
+      if test -n \"\$lt_option_debug\"; then
+        \$ECHO \"$outputname:$output:\$LINENO: newargv[0]: \$progdir/\$program\" 1>&2
+        func_lt_dump_args \${1+\"\$@\"} 1>&2
+      fi
+      exec \"\$progdir/\$program\" \${1+\"\$@\"}
+"
+    ;;
+  esac
+  $ECHO "\
+      \$ECHO \"\$0: cannot exec \$program \$*\" 1>&2
+      exit 1
+}
+
+# A function to encapsulate launching the target application
+# Strips options in the --lt-* namespace from \$@ and
+# launches target application with the remaining arguments.
+func_exec_program ()
+{
+  case \" \$* \" in
+  *\\ --lt-*)
+    for lt_wr_arg
+    do
+      case \$lt_wr_arg in
+      --lt-*) ;;
+      *) set x \"\$@\" \"\$lt_wr_arg\"; shift;;
+      esac
+      shift
+    done ;;
+  esac
+  func_exec_program_core \${1+\"\$@\"}
+}
+
+  # Parse options
+  func_parse_lt_options \"\$0\" \${1+\"\$@\"}
+
+  # Find the directory that this script lives in.
+  thisdir=\`\$ECHO \"\$file\" | $SED 's%/[^/]*$%%'\`
+  test \"x\$thisdir\" = \"x\$file\" && thisdir=.
+
+  # Follow symbolic links until we get to the real thisdir.
+  file=\`ls -ld \"\$file\" | $SED -n 's/.*-> //p'\`
+  while test -n \"\$file\"; do
+    destdir=\`\$ECHO \"\$file\" | $SED 's%/[^/]*\$%%'\`
+
+    # If there was a directory component, then change thisdir.
+    if test \"x\$destdir\" != \"x\$file\"; then
+      case \"\$destdir\" in
+      [\\\\/]* | [A-Za-z]:[\\\\/]*) thisdir=\"\$destdir\" ;;
+      *) thisdir=\"\$thisdir/\$destdir\" ;;
+      esac
+    fi
+
+    file=\`\$ECHO \"\$file\" | $SED 's%^.*/%%'\`
+    file=\`ls -ld \"\$thisdir/\$file\" | $SED -n 's/.*-> //p'\`
+  done
+
+  # Usually 'no', except on cygwin/mingw when embedded into
+  # the cwrapper.
+  WRAPPER_SCRIPT_BELONGS_IN_OBJDIR=$func_emit_wrapper_arg1
+  if test \"\$WRAPPER_SCRIPT_BELONGS_IN_OBJDIR\" = \"yes\"; then
+    # special case for '.'
+    if test \"\$thisdir\" = \".\"; then
+      thisdir=\`pwd\`
+    fi
+    # remove .libs from thisdir
+    case \"\$thisdir\" in
+    *[\\\\/]$objdir ) thisdir=\`\$ECHO \"\$thisdir\" | $SED 's%[\\\\/][^\\\\/]*$%%'\` ;;
+    $objdir )   thisdir=. ;;
+    esac
+  fi
+
+  # Try to get the absolute directory name.
+  absdir=\`cd \"\$thisdir\" && pwd\`
+  test -n \"\$absdir\" && thisdir=\"\$absdir\"
+"
+
+	if test yes = "$fast_install"; then
+	  $ECHO "\
+  program=lt-'$outputname'$exeext
+  progdir=\"\$thisdir/$objdir\"
+
+  if test ! -f \"\$progdir/\$program\" ||
+     { file=\`ls -1dt \"\$progdir/\$program\" \"\$progdir/../\$program\" 2>/dev/null | $SED 1q\`; \\
+       test \"X\$file\" != \"X\$progdir/\$program\"; }; then
+
+    file=\"\$\$-\$program\"
+
+    if test ! -d \"\$progdir\"; then
+      $MKDIR \"\$progdir\"
+    else
+      $RM \"\$progdir/\$file\"
+    fi"
+
+	  $ECHO "\
+
+    # relink executable if necessary
+    if test -n \"\$relink_command\"; then
+      if relink_command_output=\`eval \$relink_command 2>&1\`; then :
+      else
+	\$ECHO \"\$relink_command_output\" >&2
+	$RM \"\$progdir/\$file\"
+	exit 1
+      fi
+    fi
+
+    $MV \"\$progdir/\$file\" \"\$progdir/\$program\" 2>/dev/null ||
+    { $RM \"\$progdir/\$program\";
+      $MV \"\$progdir/\$file\" \"\$progdir/\$program\"; }
+    $RM \"\$progdir/\$file\"
+  fi"
+	else
+	  $ECHO "\
+  program='$outputname'
+  progdir=\"\$thisdir/$objdir\"
+"
+	fi
+
+	$ECHO "\
+
+  if test -f \"\$progdir/\$program\"; then"
+
+	# fixup the dll searchpath if we need to.
+	#
+	# Fix the DLL searchpath if we need to.  Do this before prepending
+	# to shlibpath, because on Windows, both are PATH and uninstalled
+	# libraries must come first.
+	if test -n "$dllsearchpath"; then
+	  $ECHO "\
+    # Add the dll search path components to the executable PATH
+    PATH=$dllsearchpath:\$PATH
+"
+	fi
+
+	# Export our shlibpath_var if we have one.
+	if test yes = "$shlibpath_overrides_runpath" && test -n "$shlibpath_var" && test -n "$temp_rpath"; then
+	  $ECHO "\
+    # Add our own library path to $shlibpath_var
+    $shlibpath_var=\"$temp_rpath\$$shlibpath_var\"
+
+    # Some systems cannot cope with colon-terminated $shlibpath_var
+    # The second colon is a workaround for a bug in BeOS R4 sed
+    $shlibpath_var=\`\$ECHO \"\$$shlibpath_var\" | $SED 's/::*\$//'\`
+
+    export $shlibpath_var
+"
+	fi
+
+	$ECHO "\
+    if test \"\$libtool_execute_magic\" != \"$magic\"; then
+      # Run the actual program with our arguments.
+      func_exec_program \${1+\"\$@\"}
+    fi
+  else
+    # The program doesn't exist.
+    \$ECHO \"\$0: error: '\$progdir/\$program' does not exist\" 1>&2
+    \$ECHO \"This script is just a wrapper for \$program.\" 1>&2
+    \$ECHO \"See the $PACKAGE documentation for more information.\" 1>&2
+    exit 1
+  fi
+fi\
+"
+}
+
+
+# func_emit_cwrapperexe_src
+# emit the source code for a wrapper executable on stdout
+# Must ONLY be called from within func_mode_link because
+# it depends on a number of variable set therein.
+func_emit_cwrapperexe_src ()
+{
+	cat <<EOF
+
+/* $cwrappersource - temporary wrapper executable for $objdir/$outputname
+   Generated by $PROGRAM (GNU $PACKAGE) $VERSION
+
+   The $output program cannot be directly executed until all the libtool
+   libraries that it depends on are installed.
+
+   This wrapper executable should never be moved out of the build directory.
+   If it is, it will not operate correctly.
+*/
+EOF
+	    cat <<"EOF"
+#ifdef _MSC_VER
+# define _CRT_SECURE_NO_DEPRECATE 1
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#ifdef _MSC_VER
+# include <direct.h>
+# include <process.h>
+# include <io.h>
+#else
+# include <unistd.h>
+# include <stdint.h>
+# ifdef __CYGWIN__
+#  include <io.h>
+# endif
+#endif
+#include <malloc.h>
+#include <stdarg.h>
+#include <assert.h>
+#include <string.h>
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+
+#define STREQ(s1, s2) (strcmp ((s1), (s2)) == 0)
+
+/* declarations of non-ANSI functions */
+#if defined __MINGW32__
+# ifdef __STRICT_ANSI__
+int _putenv (const char *);
+# endif
+#elif defined __CYGWIN__
+# ifdef __STRICT_ANSI__
+char *realpath (const char *, char *);
+int putenv (char *);
+int setenv (const char *, const char *, int);
+# endif
+/* #elif defined other_platform || defined ... */
+#endif
+
+/* portability defines, excluding path handling macros */
+#if defined _MSC_VER
+# define setmode _setmode
+# define stat    _stat
+# define chmod   _chmod
+# define getcwd  _getcwd
+# define putenv  _putenv
+# define S_IXUSR _S_IEXEC
+#elif defined __MINGW32__
+# define setmode _setmode
+# define stat    _stat
+# define chmod   _chmod
+# define getcwd  _getcwd
+# define putenv  _putenv
+#elif defined __CYGWIN__
+# define HAVE_SETENV
+# define FOPEN_WB "wb"
+/* #elif defined other platforms ... */
+#endif
+
+#if defined PATH_MAX
+# define LT_PATHMAX PATH_MAX
+#elif defined MAXPATHLEN
+# define LT_PATHMAX MAXPATHLEN
+#else
+# define LT_PATHMAX 1024
+#endif
+
+#ifndef S_IXOTH
+# define S_IXOTH 0
+#endif
+#ifndef S_IXGRP
+# define S_IXGRP 0
+#endif
+
+/* path handling portability macros */
+#ifndef DIR_SEPARATOR
+# define DIR_SEPARATOR '/'
+# define PATH_SEPARATOR ':'
+#endif
+
+#if defined _WIN32 || defined __MSDOS__ || defined __DJGPP__ || \
+  defined __OS2__
+# define HAVE_DOS_BASED_FILE_SYSTEM
+# define FOPEN_WB "wb"
+# ifndef DIR_SEPARATOR_2
+#  define DIR_SEPARATOR_2 '\\'
+# endif
+# ifndef PATH_SEPARATOR_2
+#  define PATH_SEPARATOR_2 ';'
+# endif
+#endif
+
+#ifndef DIR_SEPARATOR_2
+# define IS_DIR_SEPARATOR(ch) ((ch) == DIR_SEPARATOR)
+#else /* DIR_SEPARATOR_2 */
+# define IS_DIR_SEPARATOR(ch) \
+	(((ch) == DIR_SEPARATOR) || ((ch) == DIR_SEPARATOR_2))
+#endif /* DIR_SEPARATOR_2 */
+
+#ifndef PATH_SEPARATOR_2
+# define IS_PATH_SEPARATOR(ch) ((ch) == PATH_SEPARATOR)
+#else /* PATH_SEPARATOR_2 */
+# define IS_PATH_SEPARATOR(ch) ((ch) == PATH_SEPARATOR_2)
+#endif /* PATH_SEPARATOR_2 */
+
+#ifndef FOPEN_WB
+# define FOPEN_WB "w"
+#endif
+#ifndef _O_BINARY
+# define _O_BINARY 0
+#endif
+
+#define XMALLOC(type, num)      ((type *) xmalloc ((num) * sizeof(type)))
+#define XFREE(stale) do { \
+  if (stale) { free (stale); stale = 0; } \
+} while (0)
+
+#if defined LT_DEBUGWRAPPER
+static int lt_debug = 1;
+#else
+static int lt_debug = 0;
+#endif
+
+const char *program_name = "libtool-wrapper"; /* in case xstrdup fails */
+
+void *xmalloc (size_t num);
+char *xstrdup (const char *string);
+const char *base_name (const char *name);
+char *find_executable (const char *wrapper);
+char *chase_symlinks (const char *pathspec);
+int make_executable (const char *path);
+int check_executable (const char *path);
+char *strendzap (char *str, const char *pat);
+void lt_debugprintf (const char *file, int line, const char *fmt, ...);
+void lt_fatal (const char *file, int line, const char *message, ...);
+static const char *nonnull (const char *s);
+static const char *nonempty (const char *s);
+void lt_setenv (const char *name, const char *value);
+char *lt_extend_str (const char *orig_value, const char *add, int to_end);
+void lt_update_exe_path (const char *name, const char *value);
+void lt_update_lib_path (const char *name, const char *value);
+char **prepare_spawn (char **argv);
+void lt_dump_script (FILE *f);
+EOF
+
+	    cat <<EOF
+#if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 5)
+# define externally_visible volatile
+#else
+# define externally_visible __attribute__((externally_visible)) volatile
+#endif
+externally_visible const char * MAGIC_EXE = "$magic_exe";
+const char * LIB_PATH_VARNAME = "$shlibpath_var";
+EOF
+
+	    if test yes = "$shlibpath_overrides_runpath" && test -n "$shlibpath_var" && test -n "$temp_rpath"; then
+              func_to_host_path "$temp_rpath"
+	      cat <<EOF
+const char * LIB_PATH_VALUE   = "$func_to_host_path_result";
+EOF
+	    else
+	      cat <<"EOF"
+const char * LIB_PATH_VALUE   = "";
+EOF
+	    fi
+
+	    if test -n "$dllsearchpath"; then
+              func_to_host_path "$dllsearchpath:"
+	      cat <<EOF
+const char * EXE_PATH_VARNAME = "PATH";
+const char * EXE_PATH_VALUE   = "$func_to_host_path_result";
+EOF
+	    else
+	      cat <<"EOF"
+const char * EXE_PATH_VARNAME = "";
+const char * EXE_PATH_VALUE   = "";
+EOF
+	    fi
+
+	    if test yes = "$fast_install"; then
+	      cat <<EOF
+const char * TARGET_PROGRAM_NAME = "lt-$outputname"; /* hopefully, no .exe */
+EOF
+	    else
+	      cat <<EOF
+const char * TARGET_PROGRAM_NAME = "$outputname"; /* hopefully, no .exe */
+EOF
+	    fi
+
+
+	    cat <<"EOF"
+
+#define LTWRAPPER_OPTION_PREFIX         "--lt-"
+
+static const char *ltwrapper_option_prefix = LTWRAPPER_OPTION_PREFIX;
+static const char *dumpscript_opt       = LTWRAPPER_OPTION_PREFIX "dump-script";
+static const char *debug_opt            = LTWRAPPER_OPTION_PREFIX "debug";
+
+int
+main (int argc, char *argv[])
+{
+  char **newargz;
+  int  newargc;
+  char *tmp_pathspec;
+  char *actual_cwrapper_path;
+  char *actual_cwrapper_name;
+  char *target_name;
+  char *lt_argv_zero;
+  int rval = 127;
+
+  int i;
+
+  program_name = (char *) xstrdup (base_name (argv[0]));
+  newargz = XMALLOC (char *, (size_t) argc + 1);
+
+  /* very simple arg parsing; don't want to rely on getopt
+   * also, copy all non cwrapper options to newargz, except
+   * argz[0], which is handled differently
+   */
+  newargc=0;
+  for (i = 1; i < argc; i++)
+    {
+      if (STREQ (argv[i], dumpscript_opt))
+	{
+EOF
+	    case $host in
+	      *mingw* | *cygwin* )
+		# make stdout use "unix" line endings
+		echo "          setmode(1,_O_BINARY);"
+		;;
+	      esac
+
+	    cat <<"EOF"
+	  lt_dump_script (stdout);
+	  return 0;
+	}
+      if (STREQ (argv[i], debug_opt))
+	{
+          lt_debug = 1;
+          continue;
+	}
+      if (STREQ (argv[i], ltwrapper_option_prefix))
+        {
+          /* however, if there is an option in the LTWRAPPER_OPTION_PREFIX
+             namespace, but it is not one of the ones we know about and
+             have already dealt with, above (inluding dump-script), then
+             report an error. Otherwise, targets might begin to believe
+             they are allowed to use options in the LTWRAPPER_OPTION_PREFIX
+             namespace. The first time any user complains about this, we'll
+             need to make LTWRAPPER_OPTION_PREFIX a configure-time option
+             or a configure.ac-settable value.
+           */
+          lt_fatal (__FILE__, __LINE__,
+		    "unrecognized %s option: '%s'",
+                    ltwrapper_option_prefix, argv[i]);
+        }
+      /* otherwise ... */
+      newargz[++newargc] = xstrdup (argv[i]);
+    }
+  newargz[++newargc] = NULL;
+
+EOF
+	    cat <<EOF
+  /* The GNU banner must be the first non-error debug message */
+  lt_debugprintf (__FILE__, __LINE__, "libtool wrapper (GNU $PACKAGE) $VERSION\n");
+EOF
+	    cat <<"EOF"
+  lt_debugprintf (__FILE__, __LINE__, "(main) argv[0]: %s\n", argv[0]);
+  lt_debugprintf (__FILE__, __LINE__, "(main) program_name: %s\n", program_name);
+
+  tmp_pathspec = find_executable (argv[0]);
+  if (tmp_pathspec == NULL)
+    lt_fatal (__FILE__, __LINE__, "couldn't find %s", argv[0]);
+  lt_debugprintf (__FILE__, __LINE__,
+                  "(main) found exe (before symlink chase) at: %s\n",
+		  tmp_pathspec);
+
+  actual_cwrapper_path = chase_symlinks (tmp_pathspec);
+  lt_debugprintf (__FILE__, __LINE__,
+                  "(main) found exe (after symlink chase) at: %s\n",
+		  actual_cwrapper_path);
+  XFREE (tmp_pathspec);
+
+  actual_cwrapper_name = xstrdup (base_name (actual_cwrapper_path));
+  strendzap (actual_cwrapper_path, actual_cwrapper_name);
+
+  /* wrapper name transforms */
+  strendzap (actual_cwrapper_name, ".exe");
+  tmp_pathspec = lt_extend_str (actual_cwrapper_name, ".exe", 1);
+  XFREE (actual_cwrapper_name);
+  actual_cwrapper_name = tmp_pathspec;
+  tmp_pathspec = 0;
+
+  /* target_name transforms -- use actual target program name; might have lt- prefix */
+  target_name = xstrdup (base_name (TARGET_PROGRAM_NAME));
+  strendzap (target_name, ".exe");
+  tmp_pathspec = lt_extend_str (target_name, ".exe", 1);
+  XFREE (target_name);
+  target_name = tmp_pathspec;
+  tmp_pathspec = 0;
+
+  lt_debugprintf (__FILE__, __LINE__,
+		  "(main) libtool target name: %s\n",
+		  target_name);
+EOF
+
+	    cat <<EOF
+  newargz[0] =
+    XMALLOC (char, (strlen (actual_cwrapper_path) +
+		    strlen ("$objdir") + 1 + strlen (actual_cwrapper_name) + 1));
+  strcpy (newargz[0], actual_cwrapper_path);
+  strcat (newargz[0], "$objdir");
+  strcat (newargz[0], "/");
+EOF
+
+	    cat <<"EOF"
+  /* stop here, and copy so we don't have to do this twice */
+  tmp_pathspec = xstrdup (newargz[0]);
+
+  /* do NOT want the lt- prefix here, so use actual_cwrapper_name */
+  strcat (newargz[0], actual_cwrapper_name);
+
+  /* DO want the lt- prefix here if it exists, so use target_name */
+  lt_argv_zero = lt_extend_str (tmp_pathspec, target_name, 1);
+  XFREE (tmp_pathspec);
+  tmp_pathspec = NULL;
+EOF
+
+	    case $host_os in
+	      mingw*)
+	    cat <<"EOF"
+  {
+    char* p;
+    while ((p = strchr (newargz[0], '\\')) != NULL)
+      {
+	*p = '/';
+      }
+    while ((p = strchr (lt_argv_zero, '\\')) != NULL)
+      {
+	*p = '/';
+      }
+  }
+EOF
+	    ;;
+	    esac
+
+	    cat <<"EOF"
+  XFREE (target_name);
+  XFREE (actual_cwrapper_path);
+  XFREE (actual_cwrapper_name);
+
+  lt_setenv ("BIN_SH", "xpg4"); /* for Tru64 */
+  lt_setenv ("DUALCASE", "1");  /* for MSK sh */
+  /* Update the DLL searchpath.  EXE_PATH_VALUE ($dllsearchpath) must
+     be prepended before (that is, appear after) LIB_PATH_VALUE ($temp_rpath)
+     because on Windows, both *_VARNAMEs are PATH but uninstalled
+     libraries must come first. */
+  lt_update_exe_path (EXE_PATH_VARNAME, EXE_PATH_VALUE);
+  lt_update_lib_path (LIB_PATH_VARNAME, LIB_PATH_VALUE);
+
+  lt_debugprintf (__FILE__, __LINE__, "(main) lt_argv_zero: %s\n",
+		  nonnull (lt_argv_zero));
+  for (i = 0; i < newargc; i++)
+    {
+      lt_debugprintf (__FILE__, __LINE__, "(main) newargz[%d]: %s\n",
+		      i, nonnull (newargz[i]));
+    }
+
+EOF
+
+	    case $host_os in
+	      mingw*)
+		cat <<"EOF"
+  /* execv doesn't actually work on mingw as expected on unix */
+  newargz = prepare_spawn (newargz);
+  rval = (int) _spawnv (_P_WAIT, lt_argv_zero, (const char * const *) newargz);
+  if (rval == -1)
+    {
+      /* failed to start process */
+      lt_debugprintf (__FILE__, __LINE__,
+		      "(main) failed to launch target \"%s\": %s\n",
+		      lt_argv_zero, nonnull (strerror (errno)));
+      return 127;
+    }
+  return rval;
+EOF
+		;;
+	      *)
+		cat <<"EOF"
+  execv (lt_argv_zero, newargz);
+  return rval; /* =127, but avoids unused variable warning */
+EOF
+		;;
+	    esac
+
+	    cat <<"EOF"
+}
+
+void *
+xmalloc (size_t num)
+{
+  void *p = (void *) malloc (num);
+  if (!p)
+    lt_fatal (__FILE__, __LINE__, "memory exhausted");
+
+  return p;
+}
+
+char *
+xstrdup (const char *string)
+{
+  return string ? strcpy ((char *) xmalloc (strlen (string) + 1),
+			  string) : NULL;
+}
+
+const char *
+base_name (const char *name)
+{
+  const char *base;
+
+#if defined HAVE_DOS_BASED_FILE_SYSTEM
+  /* Skip over the disk name in MSDOS pathnames. */
+  if (isalpha ((unsigned char) name[0]) && name[1] == ':')
+    name += 2;
+#endif
+
+  for (base = name; *name; name++)
+    if (IS_DIR_SEPARATOR (*name))
+      base = name + 1;
+  return base;
+}
+
+int
+check_executable (const char *path)
+{
+  struct stat st;
+
+  lt_debugprintf (__FILE__, __LINE__, "(check_executable): %s\n",
+                  nonempty (path));
+  if ((!path) || (!*path))
+    return 0;
+
+  if ((stat (path, &st) >= 0)
+      && (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH)))
+    return 1;
+  else
+    return 0;
+}
+
+int
+make_executable (const char *path)
+{
+  int rval = 0;
+  struct stat st;
+
+  lt_debugprintf (__FILE__, __LINE__, "(make_executable): %s\n",
+                  nonempty (path));
+  if ((!path) || (!*path))
+    return 0;
+
+  if (stat (path, &st) >= 0)
+    {
+      rval = chmod (path, st.st_mode | S_IXOTH | S_IXGRP | S_IXUSR);
+    }
+  return rval;
+}
+
+/* Searches for the full path of the wrapper.  Returns
+   newly allocated full path name if found, NULL otherwise
+   Does not chase symlinks, even on platforms that support them.
+*/
+char *
+find_executable (const char *wrapper)
+{
+  int has_slash = 0;
+  const char *p;
+  const char *p_next;
+  /* static buffer for getcwd */
+  char tmp[LT_PATHMAX + 1];
+  size_t tmp_len;
+  char *concat_name;
+
+  lt_debugprintf (__FILE__, __LINE__, "(find_executable): %s\n",
+                  nonempty (wrapper));
+
+  if ((wrapper == NULL) || (*wrapper == '\0'))
+    return NULL;
+
+  /* Absolute path? */
+#if defined HAVE_DOS_BASED_FILE_SYSTEM
+  if (isalpha ((unsigned char) wrapper[0]) && wrapper[1] == ':')
+    {
+      concat_name = xstrdup (wrapper);
+      if (check_executable (concat_name))
+	return concat_name;
+      XFREE (concat_name);
+    }
+  else
+    {
+#endif
+      if (IS_DIR_SEPARATOR (wrapper[0]))
+	{
+	  concat_name = xstrdup (wrapper);
+	  if (check_executable (concat_name))
+	    return concat_name;
+	  XFREE (concat_name);
+	}
+#if defined HAVE_DOS_BASED_FILE_SYSTEM
+    }
+#endif
+
+  for (p = wrapper; *p; p++)
+    if (*p == '/')
+      {
+	has_slash = 1;
+	break;
+      }
+  if (!has_slash)
+    {
+      /* no slashes; search PATH */
+      const char *path = getenv ("PATH");
+      if (path != NULL)
+	{
+	  for (p = path; *p; p = p_next)
+	    {
+	      const char *q;
+	      size_t p_len;
+	      for (q = p; *q; q++)
+		if (IS_PATH_SEPARATOR (*q))
+		  break;
+	      p_len = (size_t) (q - p);
+	      p_next = (*q == '\0' ? q : q + 1);
+	      if (p_len == 0)
+		{
+		  /* empty path: current directory */
+		  if (getcwd (tmp, LT_PATHMAX) == NULL)
+		    lt_fatal (__FILE__, __LINE__, "getcwd failed: %s",
+                              nonnull (strerror (errno)));
+		  tmp_len = strlen (tmp);
+		  concat_name =
+		    XMALLOC (char, tmp_len + 1 + strlen (wrapper) + 1);
+		  memcpy (concat_name, tmp, tmp_len);
+		  concat_name[tmp_len] = '/';
+		  strcpy (concat_name + tmp_len + 1, wrapper);
+		}
+	      else
+		{
+		  concat_name =
+		    XMALLOC (char, p_len + 1 + strlen (wrapper) + 1);
+		  memcpy (concat_name, p, p_len);
+		  concat_name[p_len] = '/';
+		  strcpy (concat_name + p_len + 1, wrapper);
+		}
+	      if (check_executable (concat_name))
+		return concat_name;
+	      XFREE (concat_name);
+	    }
+	}
+      /* not found in PATH; assume curdir */
+    }
+  /* Relative path | not found in path: prepend cwd */
+  if (getcwd (tmp, LT_PATHMAX) == NULL)
+    lt_fatal (__FILE__, __LINE__, "getcwd failed: %s",
+              nonnull (strerror (errno)));
+  tmp_len = strlen (tmp);
+  concat_name = XMALLOC (char, tmp_len + 1 + strlen (wrapper) + 1);
+  memcpy (concat_name, tmp, tmp_len);
+  concat_name[tmp_len] = '/';
+  strcpy (concat_name + tmp_len + 1, wrapper);
+
+  if (check_executable (concat_name))
+    return concat_name;
+  XFREE (concat_name);
+  return NULL;
+}
+
+char *
+chase_symlinks (const char *pathspec)
+{
+#ifndef S_ISLNK
+  return xstrdup (pathspec);
+#else
+  char buf[LT_PATHMAX];
+  struct stat s;
+  char *tmp_pathspec = xstrdup (pathspec);
+  char *p;
+  int has_symlinks = 0;
+  while (strlen (tmp_pathspec) && !has_symlinks)
+    {
+      lt_debugprintf (__FILE__, __LINE__,
+		      "checking path component for symlinks: %s\n",
+		      tmp_pathspec);
+      if (lstat (tmp_pathspec, &s) == 0)
+	{
+	  if (S_ISLNK (s.st_mode) != 0)
+	    {
+	      has_symlinks = 1;
+	      break;
+	    }
+
+	  /* search backwards for last DIR_SEPARATOR */
+	  p = tmp_pathspec + strlen (tmp_pathspec) - 1;
+	  while ((p > tmp_pathspec) && (!IS_DIR_SEPARATOR (*p)))
+	    p--;
+	  if ((p == tmp_pathspec) && (!IS_DIR_SEPARATOR (*p)))
+	    {
+	      /* no more DIR_SEPARATORS left */
+	      break;
+	    }
+	  *p = '\0';
+	}
+      else
+	{
+	  lt_fatal (__FILE__, __LINE__,
+		    "error accessing file \"%s\": %s",
+		    tmp_pathspec, nonnull (strerror (errno)));
+	}
+    }
+  XFREE (tmp_pathspec);
+
+  if (!has_symlinks)
+    {
+      return xstrdup (pathspec);
+    }
+
+  tmp_pathspec = realpath (pathspec, buf);
+  if (tmp_pathspec == 0)
+    {
+      lt_fatal (__FILE__, __LINE__,
+		"could not follow symlinks for %s", pathspec);
+    }
+  return xstrdup (tmp_pathspec);
+#endif
+}
+
+char *
+strendzap (char *str, const char *pat)
+{
+  size_t len, patlen;
+
+  assert (str != NULL);
+  assert (pat != NULL);
+
+  len = strlen (str);
+  patlen = strlen (pat);
+
+  if (patlen <= len)
+    {
+      str += len - patlen;
+      if (STREQ (str, pat))
+	*str = '\0';
+    }
+  return str;
+}
+
+void
+lt_debugprintf (const char *file, int line, const char *fmt, ...)
+{
+  va_list args;
+  if (lt_debug)
+    {
+      (void) fprintf (stderr, "%s:%s:%d: ", program_name, file, line);
+      va_start (args, fmt);
+      (void) vfprintf (stderr, fmt, args);
+      va_end (args);
+    }
+}
+
+static void
+lt_error_core (int exit_status, const char *file,
+	       int line, const char *mode,
+	       const char *message, va_list ap)
+{
+  fprintf (stderr, "%s:%s:%d: %s: ", program_name, file, line, mode);
+  vfprintf (stderr, message, ap);
+  fprintf (stderr, ".\n");
+
+  if (exit_status >= 0)
+    exit (exit_status);
+}
+
+void
+lt_fatal (const char *file, int line, const char *message, ...)
+{
+  va_list ap;
+  va_start (ap, message);
+  lt_error_core (EXIT_FAILURE, file, line, "FATAL", message, ap);
+  va_end (ap);
+}
+
+static const char *
+nonnull (const char *s)
+{
+  return s ? s : "(null)";
+}
+
+static const char *
+nonempty (const char *s)
+{
+  return (s && !*s) ? "(empty)" : nonnull (s);
+}
+
+void
+lt_setenv (const char *name, const char *value)
+{
+  lt_debugprintf (__FILE__, __LINE__,
+		  "(lt_setenv) setting '%s' to '%s'\n",
+                  nonnull (name), nonnull (value));
+  {
+#ifdef HAVE_SETENV
+    /* always make a copy, for consistency with !HAVE_SETENV */
+    char *str = xstrdup (value);
+    setenv (name, str, 1);
+#else
+    size_t len = strlen (name) + 1 + strlen (value) + 1;
+    char *str = XMALLOC (char, len);
+    sprintf (str, "%s=%s", name, value);
+    if (putenv (str) != EXIT_SUCCESS)
+      {
+        XFREE (str);
+      }
+#endif
+  }
+}
+
+char *
+lt_extend_str (const char *orig_value, const char *add, int to_end)
+{
+  char *new_value;
+  if (orig_value && *orig_value)
+    {
+      size_t orig_value_len = strlen (orig_value);
+      size_t add_len = strlen (add);
+      new_value = XMALLOC (char, add_len + orig_value_len + 1);
+      if (to_end)
+        {
+          strcpy (new_value, orig_value);
+          strcpy (new_value + orig_value_len, add);
+        }
+      else
+        {
+          strcpy (new_value, add);
+          strcpy (new_value + add_len, orig_value);
+        }
+    }
+  else
+    {
+      new_value = xstrdup (add);
+    }
+  return new_value;
+}
+
+void
+lt_update_exe_path (const char *name, const char *value)
+{
+  lt_debugprintf (__FILE__, __LINE__,
+		  "(lt_update_exe_path) modifying '%s' by prepending '%s'\n",
+                  nonnull (name), nonnull (value));
+
+  if (name && *name && value && *value)
+    {
+      char *new_value = lt_extend_str (getenv (name), value, 0);
+      /* some systems can't cope with a ':'-terminated path #' */
+      size_t len = strlen (new_value);
+      while ((len > 0) && IS_PATH_SEPARATOR (new_value[len-1]))
+        {
+          new_value[--len] = '\0';
+        }
+      lt_setenv (name, new_value);
+      XFREE (new_value);
+    }
+}
+
+void
+lt_update_lib_path (const char *name, const char *value)
+{
+  lt_debugprintf (__FILE__, __LINE__,
+		  "(lt_update_lib_path) modifying '%s' by prepending '%s'\n",
+                  nonnull (name), nonnull (value));
+
+  if (name && *name && value && *value)
+    {
+      char *new_value = lt_extend_str (getenv (name), value, 0);
+      lt_setenv (name, new_value);
+      XFREE (new_value);
+    }
+}
+
+EOF
+	    case $host_os in
+	      mingw*)
+		cat <<"EOF"
+
+/* Prepares an argument vector before calling spawn().
+   Note that spawn() does not by itself call the command interpreter
+     (getenv ("COMSPEC") != NULL ? getenv ("COMSPEC") :
+      ({ OSVERSIONINFO v; v.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
+         GetVersionEx(&v);
+         v.dwPlatformId == VER_PLATFORM_WIN32_NT;
+      }) ? "cmd.exe" : "command.com").
+   Instead it simply concatenates the arguments, separated by ' ', and calls
+   CreateProcess().  We must quote the arguments since Win32 CreateProcess()
+   interprets characters like ' ', '\t', '\\', '"' (but not '<' and '>') in a
+   special way:
+   - Space and tab are interpreted as delimiters. They are not treated as
+     delimiters if they are surrounded by double quotes: "...".
+   - Unescaped double quotes are removed from the input. Their only effect is
+     that within double quotes, space and tab are treated like normal
+     characters.
+   - Backslashes not followed by double quotes are not special.
+   - But 2*n+1 backslashes followed by a double quote become
+     n backslashes followed by a double quote (n >= 0):
+       \" -> "
+       \\\" -> \"
+       \\\\\" -> \\"
+ */
+#define SHELL_SPECIAL_CHARS "\"\\ \001\002\003\004\005\006\007\010\011\012\013\014\015\016\017\020\021\022\023\024\025\026\027\030\031\032\033\034\035\036\037"
+#define SHELL_SPACE_CHARS " \001\002\003\004\005\006\007\010\011\012\013\014\015\016\017\020\021\022\023\024\025\026\027\030\031\032\033\034\035\036\037"
+char **
+prepare_spawn (char **argv)
+{
+  size_t argc;
+  char **new_argv;
+  size_t i;
+
+  /* Count number of arguments.  */
+  for (argc = 0; argv[argc] != NULL; argc++)
+    ;
+
+  /* Allocate new argument vector.  */
+  new_argv = XMALLOC (char *, argc + 1);
+
+  /* Put quoted arguments into the new argument vector.  */
+  for (i = 0; i < argc; i++)
+    {
+      const char *string = argv[i];
+
+      if (string[0] == '\0')
+	new_argv[i] = xstrdup ("\"\"");
+      else if (strpbrk (string, SHELL_SPECIAL_CHARS) != NULL)
+	{
+	  int quote_around = (strpbrk (string, SHELL_SPACE_CHARS) != NULL);
+	  size_t length;
+	  unsigned int backslashes;
+	  const char *s;
+	  char *quoted_string;
+	  char *p;
+
+	  length = 0;
+	  backslashes = 0;
+	  if (quote_around)
+	    length++;
+	  for (s = string; *s != '\0'; s++)
+	    {
+	      char c = *s;
+	      if (c == '"')
+		length += backslashes + 1;
+	      length++;
+	      if (c == '\\')
+		backslashes++;
+	      else
+		backslashes = 0;
+	    }
+	  if (quote_around)
+	    length += backslashes + 1;
+
+	  quoted_string = XMALLOC (char, length + 1);
+
+	  p = quoted_string;
+	  backslashes = 0;
+	  if (quote_around)
+	    *p++ = '"';
+	  for (s = string; *s != '\0'; s++)
+	    {
+	      char c = *s;
+	      if (c == '"')
+		{
+		  unsigned int j;
+		  for (j = backslashes + 1; j > 0; j--)
+		    *p++ = '\\';
+		}
+	      *p++ = c;
+	      if (c == '\\')
+		backslashes++;
+	      else
+		backslashes = 0;
+	    }
+	  if (quote_around)
+	    {
+	      unsigned int j;
+	      for (j = backslashes; j > 0; j--)
+		*p++ = '\\';
+	      *p++ = '"';
+	    }
+	  *p = '\0';
+
+	  new_argv[i] = quoted_string;
+	}
+      else
+	new_argv[i] = (char *) string;
+    }
+  new_argv[argc] = NULL;
+
+  return new_argv;
+}
+EOF
+		;;
+	    esac
+
+            cat <<"EOF"
+void lt_dump_script (FILE* f)
+{
+EOF
+	    func_emit_wrapper yes |
+	      $SED -n -e '
+s/^\(.\{79\}\)\(..*\)/\1\
+\2/
+h
+s/\([\\"]\)/\\\1/g
+s/$/\\n/
+s/\([^\n]*\).*/  fputs ("\1", f);/p
+g
+D'
+            cat <<"EOF"
+}
+EOF
+}
+# end: func_emit_cwrapperexe_src
+
+# func_win32_import_lib_p ARG
+# True if ARG is an import lib, as indicated by $file_magic_cmd
+func_win32_import_lib_p ()
+{
+    $debug_cmd
+
+    case `eval $file_magic_cmd \"\$1\" 2>/dev/null | $SED -e 10q` in
+    *import*) : ;;
+    *) false ;;
+    esac
+}
+
+# func_suncc_cstd_abi
+# !!ONLY CALL THIS FOR SUN CC AFTER $compile_command IS FULLY EXPANDED!!
+# Several compiler flags select an ABI that is incompatible with the
+# Cstd library. Avoid specifying it if any are in CXXFLAGS.
+func_suncc_cstd_abi ()
+{
+    $debug_cmd
+
+    case " $compile_command " in
+    *" -compat=g "*|*\ -std=c++[0-9][0-9]\ *|*" -library=stdcxx4 "*|*" -library=stlport4 "*)
+      suncc_use_cstd_abi=no
+      ;;
+    *)
+      suncc_use_cstd_abi=yes
+      ;;
+    esac
+}
+
+# func_mode_link arg...
+func_mode_link ()
+{
+    $debug_cmd
+
+    case $host in
+    *-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-os2* | *-cegcc*)
+      # It is impossible to link a dll without this setting, and
+      # we shouldn't force the makefile maintainer to figure out
+      # what system we are compiling for in order to pass an extra
+      # flag for every libtool invocation.
+      # allow_undefined=no
+
+      # FIXME: Unfortunately, there are problems with the above when trying
+      # to make a dll that has undefined symbols, in which case not
+      # even a static library is built.  For now, we need to specify
+      # -no-undefined on the libtool link line when we can be certain
+      # that all symbols are satisfied, otherwise we get a static library.
+      allow_undefined=yes
+      ;;
+    *)
+      allow_undefined=yes
+      ;;
+    esac
+    libtool_args=$nonopt
+    base_compile="$nonopt $@"
+    compile_command=$nonopt
+    finalize_command=$nonopt
+
+    compile_rpath=
+    finalize_rpath=
+    compile_shlibpath=
+    finalize_shlibpath=
+    convenience=
+    old_convenience=
+    deplibs=
+    old_deplibs=
+    compiler_flags=
+    linker_flags=
+    dllsearchpath=
+    lib_search_path=`pwd`
+    inst_prefix_dir=
+    new_inherited_linker_flags=
+
+    avoid_version=no
+    bindir=
+    dlfiles=
+    dlprefiles=
+    dlself=no
+    export_dynamic=no
+    export_symbols=
+    export_symbols_regex=
+    generated=
+    libobjs=
+    ltlibs=
+    module=no
+    no_install=no
+    objs=
+    os2dllname=
+    non_pic_objects=
+    precious_files_regex=
+    prefer_static_libs=no
+    preload=false
+    prev=
+    prevarg=
+    release=
+    rpath=
+    xrpath=
+    perm_rpath=
+    temp_rpath=
+    thread_safe=no
+    vinfo=
+    vinfo_number=no
+    weak_libs=
+    single_module=$wl-single_module
+    func_infer_tag $base_compile
+
+    # We need to know -static, to get the right output filenames.
+    for arg
+    do
+      case $arg in
+      -shared)
+	test yes != "$build_libtool_libs" \
+	  && func_fatal_configuration "cannot build a shared library"
+	build_old_libs=no
+	break
+	;;
+      -all-static | -static | -static-libtool-libs)
+	case $arg in
+	-all-static)
+	  if test yes = "$build_libtool_libs" && test -z "$link_static_flag"; then
+	    func_warning "complete static linking is impossible in this configuration"
+	  fi
+	  if test -n "$link_static_flag"; then
+	    dlopen_self=$dlopen_self_static
+	  fi
+	  prefer_static_libs=yes
+	  ;;
+	-static)
+	  if test -z "$pic_flag" && test -n "$link_static_flag"; then
+	    dlopen_self=$dlopen_self_static
+	  fi
+	  prefer_static_libs=built
+	  ;;
+	-static-libtool-libs)
+	  if test -z "$pic_flag" && test -n "$link_static_flag"; then
+	    dlopen_self=$dlopen_self_static
+	  fi
+	  prefer_static_libs=yes
+	  ;;
+	esac
+	build_libtool_libs=no
+	build_old_libs=yes
+	break
+	;;
+      esac
+    done
+
+    # See if our shared archives depend on static archives.
+    test -n "$old_archive_from_new_cmds" && build_old_libs=yes
+
+    # Go through the arguments, transforming them on the way.
+    while test "$#" -gt 0; do
+      arg=$1
+      shift
+      func_quote_for_eval "$arg"
+      qarg=$func_quote_for_eval_unquoted_result
+      func_append libtool_args " $func_quote_for_eval_result"
+
+      # If the previous option needs an argument, assign it.
+      if test -n "$prev"; then
+	case $prev in
+	output)
+	  func_append compile_command " @OUTPUT@"
+	  func_append finalize_command " @OUTPUT@"
+	  ;;
+	esac
+
+	case $prev in
+	bindir)
+	  bindir=$arg
+	  prev=
+	  continue
+	  ;;
+	dlfiles|dlprefiles)
+	  $preload || {
+	    # Add the symbol object into the linking commands.
+	    func_append compile_command " @SYMFILE@"
+	    func_append finalize_command " @SYMFILE@"
+	    preload=:
+	  }
+	  case $arg in
+	  *.la | *.lo) ;;  # We handle these cases below.
+	  force)
+	    if test no = "$dlself"; then
+	      dlself=needless
+	      export_dynamic=yes
+	    fi
+	    prev=
+	    continue
+	    ;;
+	  self)
+	    if test dlprefiles = "$prev"; then
+	      dlself=yes
+	    elif test dlfiles = "$prev" && test yes != "$dlopen_self"; then
+	      dlself=yes
+	    else
+	      dlself=needless
+	      export_dynamic=yes
+	    fi
+	    prev=
+	    continue
+	    ;;
+	  *)
+	    if test dlfiles = "$prev"; then
+	      func_append dlfiles " $arg"
+	    else
+	      func_append dlprefiles " $arg"
+	    fi
+	    prev=
+	    continue
+	    ;;
+	  esac
+	  ;;
+	expsyms)
+	  export_symbols=$arg
+	  test -f "$arg" \
+	    || func_fatal_error "symbol file '$arg' does not exist"
+	  prev=
+	  continue
+	  ;;
+	expsyms_regex)
+	  export_symbols_regex=$arg
+	  prev=
+	  continue
+	  ;;
+	framework)
+	  case $host in
+	    *-*-darwin*)
+	      case "$deplibs " in
+		*" $qarg.ltframework "*) ;;
+		*) func_append deplibs " $qarg.ltframework" # this is fixed later
+		   ;;
+	      esac
+	      ;;
+	  esac
+	  prev=
+	  continue
+	  ;;
+	inst_prefix)
+	  inst_prefix_dir=$arg
+	  prev=
+	  continue
+	  ;;
+	mllvm)
+	  # Clang does not use LLVM to link, so we can simply discard any
+	  # '-mllvm $arg' options when doing the link step.
+	  prev=
+	  continue
+	  ;;
+	objectlist)
+	  if test -f "$arg"; then
+	    save_arg=$arg
+	    moreargs=
+	    for fil in `cat "$save_arg"`
+	    do
+#	      func_append moreargs " $fil"
+	      arg=$fil
+	      # A libtool-controlled object.
+
+	      # Check to see that this really is a libtool object.
+	      if func_lalib_unsafe_p "$arg"; then
+		pic_object=
+		non_pic_object=
+
+		# Read the .lo file
+		func_source "$arg"
+
+		if test -z "$pic_object" ||
+		   test -z "$non_pic_object" ||
+		   test none = "$pic_object" &&
+		   test none = "$non_pic_object"; then
+		  func_fatal_error "cannot find name of object for '$arg'"
+		fi
+
+		# Extract subdirectory from the argument.
+		func_dirname "$arg" "/" ""
+		xdir=$func_dirname_result
+
+		if test none != "$pic_object"; then
+		  # Prepend the subdirectory the object is found in.
+		  pic_object=$xdir$pic_object
+
+		  if test dlfiles = "$prev"; then
+		    if test yes = "$build_libtool_libs" && test yes = "$dlopen_support"; then
+		      func_append dlfiles " $pic_object"
+		      prev=
+		      continue
+		    else
+		      # If libtool objects are unsupported, then we need to preload.
+		      prev=dlprefiles
+		    fi
+		  fi
+
+		  # CHECK ME:  I think I busted this.  -Ossama
+		  if test dlprefiles = "$prev"; then
+		    # Preload the old-style object.
+		    func_append dlprefiles " $pic_object"
+		    prev=
+		  fi
+
+		  # A PIC object.
+		  func_append libobjs " $pic_object"
+		  arg=$pic_object
+		fi
+
+		# Non-PIC object.
+		if test none != "$non_pic_object"; then
+		  # Prepend the subdirectory the object is found in.
+		  non_pic_object=$xdir$non_pic_object
+
+		  # A standard non-PIC object
+		  func_append non_pic_objects " $non_pic_object"
+		  if test -z "$pic_object" || test none = "$pic_object"; then
+		    arg=$non_pic_object
+		  fi
+		else
+		  # If the PIC object exists, use it instead.
+		  # $xdir was prepended to $pic_object above.
+		  non_pic_object=$pic_object
+		  func_append non_pic_objects " $non_pic_object"
+		fi
+	      else
+		# Only an error if not doing a dry-run.
+		if $opt_dry_run; then
+		  # Extract subdirectory from the argument.
+		  func_dirname "$arg" "/" ""
+		  xdir=$func_dirname_result
+
+		  func_lo2o "$arg"
+		  pic_object=$xdir$objdir/$func_lo2o_result
+		  non_pic_object=$xdir$func_lo2o_result
+		  func_append libobjs " $pic_object"
+		  func_append non_pic_objects " $non_pic_object"
+	        else
+		  func_fatal_error "'$arg' is not a valid libtool object"
+		fi
+	      fi
+	    done
+	  else
+	    func_fatal_error "link input file '$arg' does not exist"
+	  fi
+	  arg=$save_arg
+	  prev=
+	  continue
+	  ;;
+	os2dllname)
+	  os2dllname=$arg
+	  prev=
+	  continue
+	  ;;
+	precious_regex)
+	  precious_files_regex=$arg
+	  prev=
+	  continue
+	  ;;
+	release)
+	  release=-$arg
+	  prev=
+	  continue
+	  ;;
+	rpath | xrpath)
+	  # We need an absolute path.
+	  case $arg in
+	  [\\/]* | [A-Za-z]:[\\/]*) ;;
+	  *)
+	    func_fatal_error "only absolute run-paths are allowed"
+	    ;;
+	  esac
+	  if test rpath = "$prev"; then
+	    case "$rpath " in
+	    *" $arg "*) ;;
+	    *) func_append rpath " $arg" ;;
+	    esac
+	  else
+	    case "$xrpath " in
+	    *" $arg "*) ;;
+	    *) func_append xrpath " $arg" ;;
+	    esac
+	  fi
+	  prev=
+	  continue
+	  ;;
+	shrext)
+	  shrext_cmds=$arg
+	  prev=
+	  continue
+	  ;;
+	weak)
+	  func_append weak_libs " $arg"
+	  prev=
+	  continue
+	  ;;
+	xcclinker)
+	  func_append linker_flags " $qarg"
+	  func_append compiler_flags " $qarg"
+	  prev=
+	  func_append compile_command " $qarg"
+	  func_append finalize_command " $qarg"
+	  continue
+	  ;;
+	xcompiler)
+	  func_append compiler_flags " $qarg"
+	  prev=
+	  func_append compile_command " $qarg"
+	  func_append finalize_command " $qarg"
+	  continue
+	  ;;
+	xlinker)
+	  func_append linker_flags " $qarg"
+	  func_append compiler_flags " $wl$qarg"
+	  prev=
+	  func_append compile_command " $wl$qarg"
+	  func_append finalize_command " $wl$qarg"
+	  continue
+	  ;;
+	*)
+	  eval "$prev=\"\$arg\""
+	  prev=
+	  continue
+	  ;;
+	esac
+      fi # test -n "$prev"
+
+      prevarg=$arg
+
+      case $arg in
+      -all-static)
+	if test -n "$link_static_flag"; then
+	  # See comment for -static flag below, for more details.
+	  func_append compile_command " $link_static_flag"
+	  func_append finalize_command " $link_static_flag"
+	fi
+	continue
+	;;
+
+      -allow-undefined)
+	# FIXME: remove this flag sometime in the future.
+	func_fatal_error "'-allow-undefined' must not be used because it is the default"
+	;;
+
+      -avoid-version)
+	avoid_version=yes
+	continue
+	;;
+
+      -bindir)
+	prev=bindir
+	continue
+	;;
+
+      -dlopen)
+	prev=dlfiles
+	continue
+	;;
+
+      -dlpreopen)
+	prev=dlprefiles
+	continue
+	;;
+
+      -export-dynamic)
+	export_dynamic=yes
+	continue
+	;;
+
+      -export-symbols | -export-symbols-regex)
+	if test -n "$export_symbols" || test -n "$export_symbols_regex"; then
+	  func_fatal_error "more than one -exported-symbols argument is not allowed"
+	fi
+	if test X-export-symbols = "X$arg"; then
+	  prev=expsyms
+	else
+	  prev=expsyms_regex
+	fi
+	continue
+	;;
+
+      -framework)
+	prev=framework
+	continue
+	;;
+
+      -inst-prefix-dir)
+	prev=inst_prefix
+	continue
+	;;
+
+      # The native IRIX linker understands -LANG:*, -LIST:* and -LNO:*
+      # so, if we see these flags be careful not to treat them like -L
+      -L[A-Z][A-Z]*:*)
+	case $with_gcc/$host in
+	no/*-*-irix* | /*-*-irix*)
+	  func_append compile_command " $arg"
+	  func_append finalize_command " $arg"
+	  ;;
+	esac
+	continue
+	;;
+
+      -L*)
+	func_stripname "-L" '' "$arg"
+	if test -z "$func_stripname_result"; then
+	  if test "$#" -gt 0; then
+	    func_fatal_error "require no space between '-L' and '$1'"
+	  else
+	    func_fatal_error "need path for '-L' option"
+	  fi
+	fi
+	func_resolve_sysroot "$func_stripname_result"
+	dir=$func_resolve_sysroot_result
+	# We need an absolute path.
+	case $dir in
+	[\\/]* | [A-Za-z]:[\\/]*) ;;
+	*)
+	  absdir=`cd "$dir" && pwd`
+	  test -z "$absdir" && \
+	    func_fatal_error "cannot determine absolute directory name of '$dir'"
+	  dir=$absdir
+	  ;;
+	esac
+	case "$deplibs " in
+	*" -L$dir "* | *" $arg "*)
+	  # Will only happen for absolute or sysroot arguments
+	  ;;
+	*)
+	  # Preserve sysroot, but never include relative directories
+	  case $dir in
+	    [\\/]* | [A-Za-z]:[\\/]* | =*) func_append deplibs " $arg" ;;
+	    *) func_append deplibs " -L$dir" ;;
+	  esac
+	  func_append lib_search_path " $dir"
+	  ;;
+	esac
+	case $host in
+	*-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-os2* | *-cegcc*)
+	  testbindir=`$ECHO "$dir" | $SED 's*/lib$*/bin*'`
+	  case :$dllsearchpath: in
+	  *":$dir:"*) ;;
+	  ::) dllsearchpath=$dir;;
+	  *) func_append dllsearchpath ":$dir";;
+	  esac
+	  case :$dllsearchpath: in
+	  *":$testbindir:"*) ;;
+	  ::) dllsearchpath=$testbindir;;
+	  *) func_append dllsearchpath ":$testbindir";;
+	  esac
+	  ;;
+	esac
+	continue
+	;;
+
+      -l*)
+	if test X-lc = "X$arg" || test X-lm = "X$arg"; then
+	  case $host in
+	  *-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-beos* | *-cegcc* | *-*-haiku*)
+	    # These systems don't actually have a C or math library (as such)
+	    continue
+	    ;;
+	  *-*-os2*)
+	    # These systems don't actually have a C library (as such)
+	    test X-lc = "X$arg" && continue
+	    ;;
+	  *-*-openbsd* | *-*-freebsd* | *-*-dragonfly* | *-*-bitrig*)
+	    # Do not include libc due to us having libc/libc_r.
+	    test X-lc = "X$arg" && continue
+	    ;;
+	  *-*-rhapsody* | *-*-darwin1.[012])
+	    # Rhapsody C and math libraries are in the System framework
+	    func_append deplibs " System.ltframework"
+	    continue
+	    ;;
+	  *-*-sco3.2v5* | *-*-sco5v6*)
+	    # Causes problems with __ctype
+	    test X-lc = "X$arg" && continue
+	    ;;
+	  *-*-sysv4.2uw2* | *-*-sysv5* | *-*-unixware* | *-*-OpenUNIX*)
+	    # Compiler inserts libc in the correct place for threads to work
+	    test X-lc = "X$arg" && continue
+	    ;;
+	  esac
+	elif test X-lc_r = "X$arg"; then
+	 case $host in
+	 *-*-openbsd* | *-*-freebsd* | *-*-dragonfly* | *-*-bitrig*)
+	   # Do not include libc_r directly, use -pthread flag.
+	   continue
+	   ;;
+	 esac
+	fi
+	func_append deplibs " $arg"
+	continue
+	;;
+
+      -mllvm)
+	prev=mllvm
+	continue
+	;;
+
+      -module)
+	module=yes
+	continue
+	;;
+
+      # Tru64 UNIX uses -model [arg] to determine the layout of C++
+      # classes, name mangling, and exception handling.
+      # Darwin uses the -arch flag to determine output architecture.
+      -model|-arch|-isysroot|--sysroot)
+	func_append compiler_flags " $arg"
+	func_append compile_command " $arg"
+	func_append finalize_command " $arg"
+	prev=xcompiler
+	continue
+	;;
+
+      -mt|-mthreads|-kthread|-Kthread|-pthread|-pthreads|--thread-safe \
+      |-threads|-fopenmp|-openmp|-mp|-xopenmp|-omp|-qsmp=*)
+	func_append compiler_flags " $arg"
+	func_append compile_command " $arg"
+	func_append finalize_command " $arg"
+	case "$new_inherited_linker_flags " in
+	    *" $arg "*) ;;
+	    * ) func_append new_inherited_linker_flags " $arg" ;;
+	esac
+	continue
+	;;
+
+      -multi_module)
+	single_module=$wl-multi_module
+	continue
+	;;
+
+      -no-fast-install)
+	fast_install=no
+	continue
+	;;
+
+      -no-install)
+	case $host in
+	*-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-os2* | *-*-darwin* | *-cegcc*)
+	  # The PATH hackery in wrapper scripts is required on Windows
+	  # and Darwin in order for the loader to find any dlls it needs.
+	  func_warning "'-no-install' is ignored for $host"
+	  func_warning "assuming '-no-fast-install' instead"
+	  fast_install=no
+	  ;;
+	*) no_install=yes ;;
+	esac
+	continue
+	;;
+
+      -no-undefined)
+	allow_undefined=no
+	continue
+	;;
+
+      -objectlist)
+	prev=objectlist
+	continue
+	;;
+
+      -os2dllname)
+	prev=os2dllname
+	continue
+	;;
+
+      -o) prev=output ;;
+
+      -precious-files-regex)
+	prev=precious_regex
+	continue
+	;;
+
+      -release)
+	prev=release
+	continue
+	;;
+
+      -rpath)
+	prev=rpath
+	continue
+	;;
+
+      -R)
+	prev=xrpath
+	continue
+	;;
+
+      -R*)
+	func_stripname '-R' '' "$arg"
+	dir=$func_stripname_result
+	# We need an absolute path.
+	case $dir in
+	[\\/]* | [A-Za-z]:[\\/]*) ;;
+	=*)
+	  func_stripname '=' '' "$dir"
+	  dir=$lt_sysroot$func_stripname_result
+	  ;;
+	*)
+	  func_fatal_error "only absolute run-paths are allowed"
+	  ;;
+	esac
+	case "$xrpath " in
+	*" $dir "*) ;;
+	*) func_append xrpath " $dir" ;;
+	esac
+	continue
+	;;
+
+      -shared)
+	# The effects of -shared are defined in a previous loop.
+	continue
+	;;
+
+      -shrext)
+	prev=shrext
+	continue
+	;;
+
+      -static | -static-libtool-libs)
+	# The effects of -static are defined in a previous loop.
+	# We used to do the same as -all-static on platforms that
+	# didn't have a PIC flag, but the assumption that the effects
+	# would be equivalent was wrong.  It would break on at least
+	# Digital Unix and AIX.
+	continue
+	;;
+
+      -thread-safe)
+	thread_safe=yes
+	continue
+	;;
+
+      -version-info)
+	prev=vinfo
+	continue
+	;;
+
+      -version-number)
+	prev=vinfo
+	vinfo_number=yes
+	continue
+	;;
+
+      -weak)
+        prev=weak
+	continue
+	;;
+
+      -Wc,*)
+	func_stripname '-Wc,' '' "$arg"
+	args=$func_stripname_result
+	arg=
+	save_ifs=$IFS; IFS=,
+	for flag in $args; do
+	  IFS=$save_ifs
+          func_quote_for_eval "$flag"
+	  func_append arg " $func_quote_for_eval_result"
+	  func_append compiler_flags " $func_quote_for_eval_result"
+	done
+	IFS=$save_ifs
+	func_stripname ' ' '' "$arg"
+	arg=$func_stripname_result
+	;;
+
+      -Wl,*)
+	func_stripname '-Wl,' '' "$arg"
+	args=$func_stripname_result
+	arg=
+	save_ifs=$IFS; IFS=,
+	for flag in $args; do
+	  IFS=$save_ifs
+          func_quote_for_eval "$flag"
+	  func_append arg " $wl$func_quote_for_eval_result"
+	  func_append compiler_flags " $wl$func_quote_for_eval_result"
+	  func_append linker_flags " $func_quote_for_eval_result"
+	done
+	IFS=$save_ifs
+	func_stripname ' ' '' "$arg"
+	arg=$func_stripname_result
+	;;
+
+      -Xcompiler)
+	prev=xcompiler
+	continue
+	;;
+
+      -Xlinker)
+	prev=xlinker
+	continue
+	;;
+
+      -XCClinker)
+	prev=xcclinker
+	continue
+	;;
+
+      # -msg_* for osf cc
+      -msg_*)
+	func_quote_for_eval "$arg"
+	arg=$func_quote_for_eval_result
+	;;
+
+      # Flags to be passed through unchanged, with rationale:
+      # -64, -mips[0-9]      enable 64-bit mode for the SGI compiler
+      # -r[0-9][0-9]*        specify processor for the SGI compiler
+      # -xarch=*, -xtarget=* enable 64-bit mode for the Sun compiler
+      # +DA*, +DD*           enable 64-bit mode for the HP compiler
+      # -q*                  compiler args for the IBM compiler
+      # -m*, -t[45]*, -txscale* architecture-specific flags for GCC
+      # -F/path              path to uninstalled frameworks, gcc on darwin
+      # -p, -pg, --coverage, -fprofile-*  profiling flags for GCC
+      # -fstack-protector*   stack protector flags for GCC
+      # @file                GCC response files
+      # -tp=*                Portland pgcc target processor selection
+      # --sysroot=*          for sysroot support
+      # -O*, -g*, -flto*, -fwhopr*, -fuse-linker-plugin GCC link-time optimization
+      # -specs=*             GCC specs files
+      # -stdlib=*            select c++ std lib with clang
+      # -fsanitize=*         Clang/GCC memory and address sanitizer
+      -64|-mips[0-9]|-r[0-9][0-9]*|-xarch=*|-xtarget=*|+DA*|+DD*|-q*|-m*| \
+      -t[45]*|-txscale*|-p|-pg|--coverage|-fprofile-*|-F*|@*|-tp=*|--sysroot=*| \
+      -O*|-g*|-flto*|-fwhopr*|-fuse-linker-plugin|-fstack-protector*|-stdlib=*| \
+      -specs=*|-fsanitize=*)
+        func_quote_for_eval "$arg"
+	arg=$func_quote_for_eval_result
+        func_append compile_command " $arg"
+        func_append finalize_command " $arg"
+        func_append compiler_flags " $arg"
+        continue
+        ;;
+
+      -Z*)
+        if test os2 = "`expr $host : '.*\(os2\)'`"; then
+          # OS/2 uses -Zxxx to specify OS/2-specific options
+	  compiler_flags="$compiler_flags $arg"
+	  func_append compile_command " $arg"
+	  func_append finalize_command " $arg"
+	  case $arg in
+	  -Zlinker | -Zstack)
+	    prev=xcompiler
+	    ;;
+	  esac
+	  continue
+        else
+	  # Otherwise treat like 'Some other compiler flag' below
+	  func_quote_for_eval "$arg"
+	  arg=$func_quote_for_eval_result
+        fi
+	;;
+
+      # Some other compiler flag.
+      -* | +*)
+        func_quote_for_eval "$arg"
+	arg=$func_quote_for_eval_result
+	;;
+
+      *.$objext)
+	# A standard object.
+	func_append objs " $arg"
+	;;
+
+      *.lo)
+	# A libtool-controlled object.
+
+	# Check to see that this really is a libtool object.
+	if func_lalib_unsafe_p "$arg"; then
+	  pic_object=
+	  non_pic_object=
+
+	  # Read the .lo file
+	  func_source "$arg"
+
+	  if test -z "$pic_object" ||
+	     test -z "$non_pic_object" ||
+	     test none = "$pic_object" &&
+	     test none = "$non_pic_object"; then
+	    func_fatal_error "cannot find name of object for '$arg'"
+	  fi
+
+	  # Extract subdirectory from the argument.
+	  func_dirname "$arg" "/" ""
+	  xdir=$func_dirname_result
+
+	  test none = "$pic_object" || {
+	    # Prepend the subdirectory the object is found in.
+	    pic_object=$xdir$pic_object
+
+	    if test dlfiles = "$prev"; then
+	      if test yes = "$build_libtool_libs" && test yes = "$dlopen_support"; then
+		func_append dlfiles " $pic_object"
+		prev=
+		continue
+	      else
+		# If libtool objects are unsupported, then we need to preload.
+		prev=dlprefiles
+	      fi
+	    fi
+
+	    # CHECK ME:  I think I busted this.  -Ossama
+	    if test dlprefiles = "$prev"; then
+	      # Preload the old-style object.
+	      func_append dlprefiles " $pic_object"
+	      prev=
+	    fi
+
+	    # A PIC object.
+	    func_append libobjs " $pic_object"
+	    arg=$pic_object
+	  }
+
+	  # Non-PIC object.
+	  if test none != "$non_pic_object"; then
+	    # Prepend the subdirectory the object is found in.
+	    non_pic_object=$xdir$non_pic_object
+
+	    # A standard non-PIC object
+	    func_append non_pic_objects " $non_pic_object"
+	    if test -z "$pic_object" || test none = "$pic_object"; then
+	      arg=$non_pic_object
+	    fi
+	  else
+	    # If the PIC object exists, use it instead.
+	    # $xdir was prepended to $pic_object above.
+	    non_pic_object=$pic_object
+	    func_append non_pic_objects " $non_pic_object"
+	  fi
+	else
+	  # Only an error if not doing a dry-run.
+	  if $opt_dry_run; then
+	    # Extract subdirectory from the argument.
+	    func_dirname "$arg" "/" ""
+	    xdir=$func_dirname_result
+
+	    func_lo2o "$arg"
+	    pic_object=$xdir$objdir/$func_lo2o_result
+	    non_pic_object=$xdir$func_lo2o_result
+	    func_append libobjs " $pic_object"
+	    func_append non_pic_objects " $non_pic_object"
+	  else
+	    func_fatal_error "'$arg' is not a valid libtool object"
+	  fi
+	fi
+	;;
+
+      *.$libext)
+	# An archive.
+	func_append deplibs " $arg"
+	func_append old_deplibs " $arg"
+	continue
+	;;
+
+      *.la)
+	# A libtool-controlled library.
+
+	func_resolve_sysroot "$arg"
+	if test dlfiles = "$prev"; then
+	  # This library was specified with -dlopen.
+	  func_append dlfiles " $func_resolve_sysroot_result"
+	  prev=
+	elif test dlprefiles = "$prev"; then
+	  # The library was specified with -dlpreopen.
+	  func_append dlprefiles " $func_resolve_sysroot_result"
+	  prev=
+	else
+	  func_append deplibs " $func_resolve_sysroot_result"
+	fi
+	continue
+	;;
+
+      # Some other compiler argument.
+      *)
+	# Unknown arguments in both finalize_command and compile_command need
+	# to be aesthetically quoted because they are evaled later.
+	func_quote_for_eval "$arg"
+	arg=$func_quote_for_eval_result
+	;;
+      esac # arg
+
+      # Now actually substitute the argument into the commands.
+      if test -n "$arg"; then
+	func_append compile_command " $arg"
+	func_append finalize_command " $arg"
+      fi
+    done # argument parsing loop
+
+    test -n "$prev" && \
+      func_fatal_help "the '$prevarg' option requires an argument"
+
+    if test yes = "$export_dynamic" && test -n "$export_dynamic_flag_spec"; then
+      eval arg=\"$export_dynamic_flag_spec\"
+      func_append compile_command " $arg"
+      func_append finalize_command " $arg"
+    fi
+
+    oldlibs=
+    # calculate the name of the file, without its directory
+    func_basename "$output"
+    outputname=$func_basename_result
+    libobjs_save=$libobjs
+
+    if test -n "$shlibpath_var"; then
+      # get the directories listed in $shlibpath_var
+      eval shlib_search_path=\`\$ECHO \"\$$shlibpath_var\" \| \$SED \'s/:/ /g\'\`
+    else
+      shlib_search_path=
+    fi
+    eval sys_lib_search_path=\"$sys_lib_search_path_spec\"
+    eval sys_lib_dlsearch_path=\"$sys_lib_dlsearch_path_spec\"
+
+    # Definition is injected by LT_CONFIG during libtool generation.
+    func_munge_path_list sys_lib_dlsearch_path "$LT_SYS_LIBRARY_PATH"
+
+    func_dirname "$output" "/" ""
+    output_objdir=$func_dirname_result$objdir
+    func_to_tool_file "$output_objdir/"
+    tool_output_objdir=$func_to_tool_file_result
+    # Create the object directory.
+    func_mkdir_p "$output_objdir"
+
+    # Determine the type of output
+    case $output in
+    "")
+      func_fatal_help "you must specify an output file"
+      ;;
+    *.$libext) linkmode=oldlib ;;
+    *.lo | *.$objext) linkmode=obj ;;
+    *.la) linkmode=lib ;;
+    *) linkmode=prog ;; # Anything else should be a program.
+    esac
+
+    specialdeplibs=
+
+    libs=
+    # Find all interdependent deplibs by searching for libraries
+    # that are linked more than once (e.g. -la -lb -la)
+    for deplib in $deplibs; do
+      if $opt_preserve_dup_deps; then
+	case "$libs " in
+	*" $deplib "*) func_append specialdeplibs " $deplib" ;;
+	esac
+      fi
+      func_append libs " $deplib"
+    done
+
+    if test lib = "$linkmode"; then
+      libs="$predeps $libs $compiler_lib_search_path $postdeps"
+
+      # Compute libraries that are listed more than once in $predeps
+      # $postdeps and mark them as special (i.e., whose duplicates are
+      # not to be eliminated).
+      pre_post_deps=
+      if $opt_duplicate_compiler_generated_deps; then
+	for pre_post_dep in $predeps $postdeps; do
+	  case "$pre_post_deps " in
+	  *" $pre_post_dep "*) func_append specialdeplibs " $pre_post_deps" ;;
+	  esac
+	  func_append pre_post_deps " $pre_post_dep"
+	done
+      fi
+      pre_post_deps=
+    fi
+
+    deplibs=
+    newdependency_libs=
+    newlib_search_path=
+    need_relink=no # whether we're linking any uninstalled libtool libraries
+    notinst_deplibs= # not-installed libtool libraries
+    notinst_path= # paths that contain not-installed libtool libraries
+
+    case $linkmode in
+    lib)
+	passes="conv dlpreopen link"
+	for file in $dlfiles $dlprefiles; do
+	  case $file in
+	  *.la) ;;
+	  *)
+	    func_fatal_help "libraries can '-dlopen' only libtool libraries: $file"
+	    ;;
+	  esac
+	done
+	;;
+    prog)
+	compile_deplibs=
+	finalize_deplibs=
+	alldeplibs=false
+	newdlfiles=
+	newdlprefiles=
+	passes="conv scan dlopen dlpreopen link"
+	;;
+    *)  passes="conv"
+	;;
+    esac
+
+    for pass in $passes; do
+      # The preopen pass in lib mode reverses $deplibs; put it back here
+      # so that -L comes before libs that need it for instance...
+      if test lib,link = "$linkmode,$pass"; then
+	## FIXME: Find the place where the list is rebuilt in the wrong
+	##        order, and fix it there properly
+        tmp_deplibs=
+	for deplib in $deplibs; do
+	  tmp_deplibs="$deplib $tmp_deplibs"
+	done
+	deplibs=$tmp_deplibs
+      fi
+
+      if test lib,link = "$linkmode,$pass" ||
+	 test prog,scan = "$linkmode,$pass"; then
+	libs=$deplibs
+	deplibs=
+      fi
+      if test prog = "$linkmode"; then
+	case $pass in
+	dlopen) libs=$dlfiles ;;
+	dlpreopen) libs=$dlprefiles ;;
+	link)
+	  libs="$deplibs %DEPLIBS%"
+	  test "X$link_all_deplibs" != Xno && libs="$libs $dependency_libs"
+	  ;;
+	esac
+      fi
+      if test lib,dlpreopen = "$linkmode,$pass"; then
+	# Collect and forward deplibs of preopened libtool libs
+	for lib in $dlprefiles; do
+	  # Ignore non-libtool-libs
+	  dependency_libs=
+	  func_resolve_sysroot "$lib"
+	  case $lib in
+	  *.la)	func_source "$func_resolve_sysroot_result" ;;
+	  esac
+
+	  # Collect preopened libtool deplibs, except any this library
+	  # has declared as weak libs
+	  for deplib in $dependency_libs; do
+	    func_basename "$deplib"
+            deplib_base=$func_basename_result
+	    case " $weak_libs " in
+	    *" $deplib_base "*) ;;
+	    *) func_append deplibs " $deplib" ;;
+	    esac
+	  done
+	done
+	libs=$dlprefiles
+      fi
+      if test dlopen = "$pass"; then
+	# Collect dlpreopened libraries
+	save_deplibs=$deplibs
+	deplibs=
+      fi
+
+      for deplib in $libs; do
+	lib=
+	found=false
+	case $deplib in
+	-mt|-mthreads|-kthread|-Kthread|-pthread|-pthreads|--thread-safe \
+        |-threads|-fopenmp|-openmp|-mp|-xopenmp|-omp|-qsmp=*)
+	  if test prog,link = "$linkmode,$pass"; then
+	    compile_deplibs="$deplib $compile_deplibs"
+	    finalize_deplibs="$deplib $finalize_deplibs"
+	  else
+	    func_append compiler_flags " $deplib"
+	    if test lib = "$linkmode"; then
+		case "$new_inherited_linker_flags " in
+		    *" $deplib "*) ;;
+		    * ) func_append new_inherited_linker_flags " $deplib" ;;
+		esac
+	    fi
+	  fi
+	  continue
+	  ;;
+	-l*)
+	  if test lib != "$linkmode" && test prog != "$linkmode"; then
+	    func_warning "'-l' is ignored for archives/objects"
+	    continue
+	  fi
+	  func_stripname '-l' '' "$deplib"
+	  name=$func_stripname_result
+	  if test lib = "$linkmode"; then
+	    searchdirs="$newlib_search_path $lib_search_path $compiler_lib_search_dirs $sys_lib_search_path $shlib_search_path"
+	  else
+	    searchdirs="$newlib_search_path $lib_search_path $sys_lib_search_path $shlib_search_path"
+	  fi
+	  for searchdir in $searchdirs; do
+	    for search_ext in .la $std_shrext .so .a; do
+	      # Search the libtool library
+	      lib=$searchdir/lib$name$search_ext
+	      if test -f "$lib"; then
+		if test .la = "$search_ext"; then
+		  found=:
+		else
+		  found=false
+		fi
+		break 2
+	      fi
+	    done
+	  done
+	  if $found; then
+	    # deplib is a libtool library
+	    # If $allow_libtool_libs_with_static_runtimes && $deplib is a stdlib,
+	    # We need to do some special things here, and not later.
+	    if test yes = "$allow_libtool_libs_with_static_runtimes"; then
+	      case " $predeps $postdeps " in
+	      *" $deplib "*)
+		if func_lalib_p "$lib"; then
+		  library_names=
+		  old_library=
+		  func_source "$lib"
+		  for l in $old_library $library_names; do
+		    ll=$l
+		  done
+		  if test "X$ll" = "X$old_library"; then # only static version available
+		    found=false
+		    func_dirname "$lib" "" "."
+		    ladir=$func_dirname_result
+		    lib=$ladir/$old_library
+		    if test prog,link = "$linkmode,$pass"; then
+		      compile_deplibs="$deplib $compile_deplibs"
+		      finalize_deplibs="$deplib $finalize_deplibs"
+		    else
+		      deplibs="$deplib $deplibs"
+		      test lib = "$linkmode" && newdependency_libs="$deplib $newdependency_libs"
+		    fi
+		    continue
+		  fi
+		fi
+		;;
+	      *) ;;
+	      esac
+	    fi
+	  else
+	    # deplib doesn't seem to be a libtool library
+	    if test prog,link = "$linkmode,$pass"; then
+	      compile_deplibs="$deplib $compile_deplibs"
+	      finalize_deplibs="$deplib $finalize_deplibs"
+	    else
+	      deplibs="$deplib $deplibs"
+	      test lib = "$linkmode" && newdependency_libs="$deplib $newdependency_libs"
+	    fi
+	    continue
+	  fi
+	  ;; # -l
+	*.ltframework)
+	  if test prog,link = "$linkmode,$pass"; then
+	    compile_deplibs="$deplib $compile_deplibs"
+	    finalize_deplibs="$deplib $finalize_deplibs"
+	  else
+	    deplibs="$deplib $deplibs"
+	    if test lib = "$linkmode"; then
+		case "$new_inherited_linker_flags " in
+		    *" $deplib "*) ;;
+		    * ) func_append new_inherited_linker_flags " $deplib" ;;
+		esac
+	    fi
+	  fi
+	  continue
+	  ;;
+	-L*)
+	  case $linkmode in
+	  lib)
+	    deplibs="$deplib $deplibs"
+	    test conv = "$pass" && continue
+	    newdependency_libs="$deplib $newdependency_libs"
+	    func_stripname '-L' '' "$deplib"
+	    func_resolve_sysroot "$func_stripname_result"
+	    func_append newlib_search_path " $func_resolve_sysroot_result"
+	    ;;
+	  prog)
+	    if test conv = "$pass"; then
+	      deplibs="$deplib $deplibs"
+	      continue
+	    fi
+	    if test scan = "$pass"; then
+	      deplibs="$deplib $deplibs"
+	    else
+	      compile_deplibs="$deplib $compile_deplibs"
+	      finalize_deplibs="$deplib $finalize_deplibs"
+	    fi
+	    func_stripname '-L' '' "$deplib"
+	    func_resolve_sysroot "$func_stripname_result"
+	    func_append newlib_search_path " $func_resolve_sysroot_result"
+	    ;;
+	  *)
+	    func_warning "'-L' is ignored for archives/objects"
+	    ;;
+	  esac # linkmode
+	  continue
+	  ;; # -L
+	-R*)
+	  if test link = "$pass"; then
+	    func_stripname '-R' '' "$deplib"
+	    func_resolve_sysroot "$func_stripname_result"
+	    dir=$func_resolve_sysroot_result
+	    # Make sure the xrpath contains only unique directories.
+	    case "$xrpath " in
+	    *" $dir "*) ;;
+	    *) func_append xrpath " $dir" ;;
+	    esac
+	  fi
+	  deplibs="$deplib $deplibs"
+	  continue
+	  ;;
+	*.la)
+	  func_resolve_sysroot "$deplib"
+	  lib=$func_resolve_sysroot_result
+	  ;;
+	*.$libext)
+	  if test conv = "$pass"; then
+	    deplibs="$deplib $deplibs"
+	    continue
+	  fi
+	  case $linkmode in
+	  lib)
+	    # Linking convenience modules into shared libraries is allowed,
+	    # but linking other static libraries is non-portable.
+	    case " $dlpreconveniencelibs " in
+	    *" $deplib "*) ;;
+	    *)
+	      valid_a_lib=false
+	      case $deplibs_check_method in
+		match_pattern*)
+		  set dummy $deplibs_check_method; shift
+		  match_pattern_regex=`expr "$deplibs_check_method" : "$1 \(.*\)"`
+		  if eval "\$ECHO \"$deplib\"" 2>/dev/null | $SED 10q \
+		    | $EGREP "$match_pattern_regex" > /dev/null; then
+		    valid_a_lib=:
+		  fi
+		;;
+		pass_all)
+		  valid_a_lib=:
+		;;
+	      esac
+	      if $valid_a_lib; then
+		echo
+		$ECHO "*** Warning: Linking the shared library $output against the"
+		$ECHO "*** static library $deplib is not portable!"
+		deplibs="$deplib $deplibs"
+	      else
+		echo
+		$ECHO "*** Warning: Trying to link with static lib archive $deplib."
+		echo "*** I have the capability to make that library automatically link in when"
+		echo "*** you link to this library.  But I can only do this if you have a"
+		echo "*** shared version of the library, which you do not appear to have"
+		echo "*** because the file extensions .$libext of this argument makes me believe"
+		echo "*** that it is just a static archive that I should not use here."
+	      fi
+	      ;;
+	    esac
+	    continue
+	    ;;
+	  prog)
+	    if test link != "$pass"; then
+	      deplibs="$deplib $deplibs"
+	    else
+	      compile_deplibs="$deplib $compile_deplibs"
+	      finalize_deplibs="$deplib $finalize_deplibs"
+	    fi
+	    continue
+	    ;;
+	  esac # linkmode
+	  ;; # *.$libext
+	*.lo | *.$objext)
+	  if test conv = "$pass"; then
+	    deplibs="$deplib $deplibs"
+	  elif test prog = "$linkmode"; then
+	    if test dlpreopen = "$pass" || test yes != "$dlopen_support" || test no = "$build_libtool_libs"; then
+	      # If there is no dlopen support or we're linking statically,
+	      # we need to preload.
+	      func_append newdlprefiles " $deplib"
+	      compile_deplibs="$deplib $compile_deplibs"
+	      finalize_deplibs="$deplib $finalize_deplibs"
+	    else
+	      func_append newdlfiles " $deplib"
+	    fi
+	  fi
+	  continue
+	  ;;
+	%DEPLIBS%)
+	  alldeplibs=:
+	  continue
+	  ;;
+	esac # case $deplib
+
+	$found || test -f "$lib" \
+	  || func_fatal_error "cannot find the library '$lib' or unhandled argument '$deplib'"
+
+	# Check to see that this really is a libtool archive.
+	func_lalib_unsafe_p "$lib" \
+	  || func_fatal_error "'$lib' is not a valid libtool archive"
+
+	func_dirname "$lib" "" "."
+	ladir=$func_dirname_result
+
+	dlname=
+	dlopen=
+	dlpreopen=
+	libdir=
+	library_names=
+	old_library=
+	inherited_linker_flags=
+	# If the library was installed with an old release of libtool,
+	# it will not redefine variables installed, or shouldnotlink
+	installed=yes
+	shouldnotlink=no
+	avoidtemprpath=
+
+
+	# Read the .la file
+	func_source "$lib"
+
+	# Convert "-framework foo" to "foo.ltframework"
+	if test -n "$inherited_linker_flags"; then
+	  tmp_inherited_linker_flags=`$ECHO "$inherited_linker_flags" | $SED 's/-framework \([^ $]*\)/\1.ltframework/g'`
+	  for tmp_inherited_linker_flag in $tmp_inherited_linker_flags; do
+	    case " $new_inherited_linker_flags " in
+	      *" $tmp_inherited_linker_flag "*) ;;
+	      *) func_append new_inherited_linker_flags " $tmp_inherited_linker_flag";;
+	    esac
+	  done
+	fi
+	dependency_libs=`$ECHO " $dependency_libs" | $SED 's% \([^ $]*\).ltframework% -framework \1%g'`
+	if test lib,link = "$linkmode,$pass" ||
+	   test prog,scan = "$linkmode,$pass" ||
+	   { test prog != "$linkmode" && test lib != "$linkmode"; }; then
+	  test -n "$dlopen" && func_append dlfiles " $dlopen"
+	  test -n "$dlpreopen" && func_append dlprefiles " $dlpreopen"
+	fi
+
+	if test conv = "$pass"; then
+	  # Only check for convenience libraries
+	  deplibs="$lib $deplibs"
+	  if test -z "$libdir"; then
+	    if test -z "$old_library"; then
+	      func_fatal_error "cannot find name of link library for '$lib'"
+	    fi
+	    # It is a libtool convenience library, so add in its objects.
+	    func_append convenience " $ladir/$objdir/$old_library"
+	    func_append old_convenience " $ladir/$objdir/$old_library"
+	    tmp_libs=
+	    for deplib in $dependency_libs; do
+	      deplibs="$deplib $deplibs"
+	      if $opt_preserve_dup_deps; then
+		case "$tmp_libs " in
+		*" $deplib "*) func_append specialdeplibs " $deplib" ;;
+		esac
+	      fi
+	      func_append tmp_libs " $deplib"
+	    done
+	  elif test prog != "$linkmode" && test lib != "$linkmode"; then
+	    func_fatal_error "'$lib' is not a convenience library"
+	  fi
+	  continue
+	fi # $pass = conv
+
+
+	# Get the name of the library we link against.
+	linklib=
+	if test -n "$old_library" &&
+	   { test yes = "$prefer_static_libs" ||
+	     test built,no = "$prefer_static_libs,$installed"; }; then
+	  linklib=$old_library
+	else
+	  for l in $old_library $library_names; do
+	    linklib=$l
+	  done
+	fi
+	if test -z "$linklib"; then
+	  func_fatal_error "cannot find name of link library for '$lib'"
+	fi
+
+	# This library was specified with -dlopen.
+	if test dlopen = "$pass"; then
+	  test -z "$libdir" \
+	    && func_fatal_error "cannot -dlopen a convenience library: '$lib'"
+	  if test -z "$dlname" ||
+	     test yes != "$dlopen_support" ||
+	     test no = "$build_libtool_libs"
+	  then
+	    # If there is no dlname, no dlopen support or we're linking
+	    # statically, we need to preload.  We also need to preload any
+	    # dependent libraries so libltdl's deplib preloader doesn't
+	    # bomb out in the load deplibs phase.
+	    func_append dlprefiles " $lib $dependency_libs"
+	  else
+	    func_append newdlfiles " $lib"
+	  fi
+	  continue
+	fi # $pass = dlopen
+
+	# We need an absolute path.
+	case $ladir in
+	[\\/]* | [A-Za-z]:[\\/]*) abs_ladir=$ladir ;;
+	*)
+	  abs_ladir=`cd "$ladir" && pwd`
+	  if test -z "$abs_ladir"; then
+	    func_warning "cannot determine absolute directory name of '$ladir'"
+	    func_warning "passing it literally to the linker, although it might fail"
+	    abs_ladir=$ladir
+	  fi
+	  ;;
+	esac
+	func_basename "$lib"
+	laname=$func_basename_result
+
+	# Find the relevant object directory and library name.
+	if test yes = "$installed"; then
+	  if test ! -f "$lt_sysroot$libdir/$linklib" && test -f "$abs_ladir/$linklib"; then
+	    func_warning "library '$lib' was moved."
+	    dir=$ladir
+	    absdir=$abs_ladir
+	    libdir=$abs_ladir
+	  else
+	    dir=$lt_sysroot$libdir
+	    absdir=$lt_sysroot$libdir
+	  fi
+	  test yes = "$hardcode_automatic" && avoidtemprpath=yes
+	else
+	  if test ! -f "$ladir/$objdir/$linklib" && test -f "$abs_ladir/$linklib"; then
+	    dir=$ladir
+	    absdir=$abs_ladir
+	    # Remove this search path later
+	    func_append notinst_path " $abs_ladir"
+	  else
+	    dir=$ladir/$objdir
+	    absdir=$abs_ladir/$objdir
+	    # Remove this search path later
+	    func_append notinst_path " $abs_ladir"
+	  fi
+	fi # $installed = yes
+	func_stripname 'lib' '.la' "$laname"
+	name=$func_stripname_result
+
+	# This library was specified with -dlpreopen.
+	if test dlpreopen = "$pass"; then
+	  if test -z "$libdir" && test prog = "$linkmode"; then
+	    func_fatal_error "only libraries may -dlpreopen a convenience library: '$lib'"
+	  fi
+	  case $host in
+	    # special handling for platforms with PE-DLLs.
+	    *cygwin* | *mingw* | *cegcc* )
+	      # Linker will automatically link against shared library if both
+	      # static and shared are present.  Therefore, ensure we extract
+	      # symbols from the import library if a shared library is present
+	      # (otherwise, the dlopen module name will be incorrect).  We do
+	      # this by putting the import library name into $newdlprefiles.
+	      # We recover the dlopen module name by 'saving' the la file
+	      # name in a special purpose variable, and (later) extracting the
+	      # dlname from the la file.
+	      if test -n "$dlname"; then
+	        func_tr_sh "$dir/$linklib"
+	        eval "libfile_$func_tr_sh_result=\$abs_ladir/\$laname"
+	        func_append newdlprefiles " $dir/$linklib"
+	      else
+	        func_append newdlprefiles " $dir/$old_library"
+	        # Keep a list of preopened convenience libraries to check
+	        # that they are being used correctly in the link pass.
+	        test -z "$libdir" && \
+	          func_append dlpreconveniencelibs " $dir/$old_library"
+	      fi
+	    ;;
+	    * )
+	      # Prefer using a static library (so that no silly _DYNAMIC symbols
+	      # are required to link).
+	      if test -n "$old_library"; then
+	        func_append newdlprefiles " $dir/$old_library"
+	        # Keep a list of preopened convenience libraries to check
+	        # that they are being used correctly in the link pass.
+	        test -z "$libdir" && \
+	          func_append dlpreconveniencelibs " $dir/$old_library"
+	      # Otherwise, use the dlname, so that lt_dlopen finds it.
+	      elif test -n "$dlname"; then
+	        func_append newdlprefiles " $dir/$dlname"
+	      else
+	        func_append newdlprefiles " $dir/$linklib"
+	      fi
+	    ;;
+	  esac
+	fi # $pass = dlpreopen
+
+	if test -z "$libdir"; then
+	  # Link the convenience library
+	  if test lib = "$linkmode"; then
+	    deplibs="$dir/$old_library $deplibs"
+	  elif test prog,link = "$linkmode,$pass"; then
+	    compile_deplibs="$dir/$old_library $compile_deplibs"
+	    finalize_deplibs="$dir/$old_library $finalize_deplibs"
+	  else
+	    deplibs="$lib $deplibs" # used for prog,scan pass
+	  fi
+	  continue
+	fi
+
+
+	if test prog = "$linkmode" && test link != "$pass"; then
+	  func_append newlib_search_path " $ladir"
+	  deplibs="$lib $deplibs"
+
+	  linkalldeplibs=false
+	  if test no != "$link_all_deplibs" || test -z "$library_names" ||
+	     test no = "$build_libtool_libs"; then
+	    linkalldeplibs=:
+	  fi
+
+	  tmp_libs=
+	  for deplib in $dependency_libs; do
+	    case $deplib in
+	    -L*) func_stripname '-L' '' "$deplib"
+	         func_resolve_sysroot "$func_stripname_result"
+	         func_append newlib_search_path " $func_resolve_sysroot_result"
+		 ;;
+	    esac
+	    # Need to link against all dependency_libs?
+	    if $linkalldeplibs; then
+	      deplibs="$deplib $deplibs"
+	    else
+	      # Need to hardcode shared library paths
+	      # or/and link against static libraries
+	      newdependency_libs="$deplib $newdependency_libs"
+	    fi
+	    if $opt_preserve_dup_deps; then
+	      case "$tmp_libs " in
+	      *" $deplib "*) func_append specialdeplibs " $deplib" ;;
+	      esac
+	    fi
+	    func_append tmp_libs " $deplib"
+	  done # for deplib
+	  continue
+	fi # $linkmode = prog...
+
+	if test prog,link = "$linkmode,$pass"; then
+	  if test -n "$library_names" &&
+	     { { test no = "$prefer_static_libs" ||
+	         test built,yes = "$prefer_static_libs,$installed"; } ||
+	       test -z "$old_library"; }; then
+	    # We need to hardcode the library path
+	    if test -n "$shlibpath_var" && test -z "$avoidtemprpath"; then
+	      # Make sure the rpath contains only unique directories.
+	      case $temp_rpath: in
+	      *"$absdir:"*) ;;
+	      *) func_append temp_rpath "$absdir:" ;;
+	      esac
+	    fi
+
+	    # Hardcode the library path.
+	    # Skip directories that are in the system default run-time
+	    # search path.
+	    case " $sys_lib_dlsearch_path " in
+	    *" $absdir "*) ;;
+	    *)
+	      case "$compile_rpath " in
+	      *" $absdir "*) ;;
+	      *) func_append compile_rpath " $absdir" ;;
+	      esac
+	      ;;
+	    esac
+	    case " $sys_lib_dlsearch_path " in
+	    *" $libdir "*) ;;
+	    *)
+	      case "$finalize_rpath " in
+	      *" $libdir "*) ;;
+	      *) func_append finalize_rpath " $libdir" ;;
+	      esac
+	      ;;
+	    esac
+	  fi # $linkmode,$pass = prog,link...
+
+	  if $alldeplibs &&
+	     { test pass_all = "$deplibs_check_method" ||
+	       { test yes = "$build_libtool_libs" &&
+		 test -n "$library_names"; }; }; then
+	    # We only need to search for static libraries
+	    continue
+	  fi
+	fi
+
+	link_static=no # Whether the deplib will be linked statically
+	use_static_libs=$prefer_static_libs
+	if test built = "$use_static_libs" && test yes = "$installed"; then
+	  use_static_libs=no
+	fi
+	if test -n "$library_names" &&
+	   { test no = "$use_static_libs" || test -z "$old_library"; }; then
+	  case $host in
+	  *cygwin* | *mingw* | *cegcc* | *os2*)
+	      # No point in relinking DLLs because paths are not encoded
+	      func_append notinst_deplibs " $lib"
+	      need_relink=no
+	    ;;
+	  *)
+	    if test no = "$installed"; then
+	      func_append notinst_deplibs " $lib"
+	      need_relink=yes
+	    fi
+	    ;;
+	  esac
+	  # This is a shared library
+
+	  # Warn about portability, can't link against -module's on some
+	  # systems (darwin).  Don't bleat about dlopened modules though!
+	  dlopenmodule=
+	  for dlpremoduletest in $dlprefiles; do
+	    if test "X$dlpremoduletest" = "X$lib"; then
+	      dlopenmodule=$dlpremoduletest
+	      break
+	    fi
+	  done
+	  if test -z "$dlopenmodule" && test yes = "$shouldnotlink" && test link = "$pass"; then
+	    echo
+	    if test prog = "$linkmode"; then
+	      $ECHO "*** Warning: Linking the executable $output against the loadable module"
+	    else
+	      $ECHO "*** Warning: Linking the shared library $output against the loadable module"
+	    fi
+	    $ECHO "*** $linklib is not portable!"
+	  fi
+	  if test lib = "$linkmode" &&
+	     test yes = "$hardcode_into_libs"; then
+	    # Hardcode the library path.
+	    # Skip directories that are in the system default run-time
+	    # search path.
+	    case " $sys_lib_dlsearch_path " in
+	    *" $absdir "*) ;;
+	    *)
+	      case "$compile_rpath " in
+	      *" $absdir "*) ;;
+	      *) func_append compile_rpath " $absdir" ;;
+	      esac
+	      ;;
+	    esac
+	    case " $sys_lib_dlsearch_path " in
+	    *" $libdir "*) ;;
+	    *)
+	      case "$finalize_rpath " in
+	      *" $libdir "*) ;;
+	      *) func_append finalize_rpath " $libdir" ;;
+	      esac
+	      ;;
+	    esac
+	  fi
+
+	  if test -n "$old_archive_from_expsyms_cmds"; then
+	    # figure out the soname
+	    set dummy $library_names
+	    shift
+	    realname=$1
+	    shift
+	    libname=`eval "\\$ECHO \"$libname_spec\""`
+	    # use dlname if we got it. it's perfectly good, no?
+	    if test -n "$dlname"; then
+	      soname=$dlname
+	    elif test -n "$soname_spec"; then
+	      # bleh windows
+	      case $host in
+	      *cygwin* | mingw* | *cegcc* | *os2*)
+	        func_arith $current - $age
+		major=$func_arith_result
+		versuffix=-$major
+		;;
+	      esac
+	      eval soname=\"$soname_spec\"
+	    else
+	      soname=$realname
+	    fi
+
+	    # Make a new name for the extract_expsyms_cmds to use
+	    soroot=$soname
+	    func_basename "$soroot"
+	    soname=$func_basename_result
+	    func_stripname 'lib' '.dll' "$soname"
+	    newlib=libimp-$func_stripname_result.a
+
+	    # If the library has no export list, then create one now
+	    if test -f "$output_objdir/$soname-def"; then :
+	    else
+	      func_verbose "extracting exported symbol list from '$soname'"
+	      func_execute_cmds "$extract_expsyms_cmds" 'exit $?'
+	    fi
+
+	    # Create $newlib
+	    if test -f "$output_objdir/$newlib"; then :; else
+	      func_verbose "generating import library for '$soname'"
+	      func_execute_cmds "$old_archive_from_expsyms_cmds" 'exit $?'
+	    fi
+	    # make sure the library variables are pointing to the new library
+	    dir=$output_objdir
+	    linklib=$newlib
+	  fi # test -n "$old_archive_from_expsyms_cmds"
+
+	  if test prog = "$linkmode" || test relink != "$opt_mode"; then
+	    add_shlibpath=
+	    add_dir=
+	    add=
+	    lib_linked=yes
+	    case $hardcode_action in
+	    immediate | unsupported)
+	      if test no = "$hardcode_direct"; then
+		add=$dir/$linklib
+		case $host in
+		  *-*-sco3.2v5.0.[024]*) add_dir=-L$dir ;;
+		  *-*-sysv4*uw2*) add_dir=-L$dir ;;
+		  *-*-sysv5OpenUNIX* | *-*-sysv5UnixWare7.[01].[10]* | \
+		    *-*-unixware7*) add_dir=-L$dir ;;
+		  *-*-darwin* )
+		    # if the lib is a (non-dlopened) module then we cannot
+		    # link against it, someone is ignoring the earlier warnings
+		    if /usr/bin/file -L $add 2> /dev/null |
+			 $GREP ": [^:]* bundle" >/dev/null; then
+		      if test "X$dlopenmodule" != "X$lib"; then
+			$ECHO "*** Warning: lib $linklib is a module, not a shared library"
+			if test -z "$old_library"; then
+			  echo
+			  echo "*** And there doesn't seem to be a static archive available"
+			  echo "*** The link will probably fail, sorry"
+			else
+			  add=$dir/$old_library
+			fi
+		      elif test -n "$old_library"; then
+			add=$dir/$old_library
+		      fi
+		    fi
+		esac
+	      elif test no = "$hardcode_minus_L"; then
+		case $host in
+		*-*-sunos*) add_shlibpath=$dir ;;
+		esac
+		add_dir=-L$dir
+		add=-l$name
+	      elif test no = "$hardcode_shlibpath_var"; then
+		add_shlibpath=$dir
+		add=-l$name
+	      else
+		lib_linked=no
+	      fi
+	      ;;
+	    relink)
+	      if test yes = "$hardcode_direct" &&
+	         test no = "$hardcode_direct_absolute"; then
+		add=$dir/$linklib
+	      elif test yes = "$hardcode_minus_L"; then
+		add_dir=-L$absdir
+		# Try looking first in the location we're being installed to.
+		if test -n "$inst_prefix_dir"; then
+		  case $libdir in
+		    [\\/]*)
+		      func_append add_dir " -L$inst_prefix_dir$libdir"
+		      ;;
+		  esac
+		fi
+		add=-l$name
+	      elif test yes = "$hardcode_shlibpath_var"; then
+		add_shlibpath=$dir
+		add=-l$name
+	      else
+		lib_linked=no
+	      fi
+	      ;;
+	    *) lib_linked=no ;;
+	    esac
+
+	    if test yes != "$lib_linked"; then
+	      func_fatal_configuration "unsupported hardcode properties"
+	    fi
+
+	    if test -n "$add_shlibpath"; then
+	      case :$compile_shlibpath: in
+	      *":$add_shlibpath:"*) ;;
+	      *) func_append compile_shlibpath "$add_shlibpath:" ;;
+	      esac
+	    fi
+	    if test prog = "$linkmode"; then
+	      test -n "$add_dir" && compile_deplibs="$add_dir $compile_deplibs"
+	      test -n "$add" && compile_deplibs="$add $compile_deplibs"
+	    else
+	      test -n "$add_dir" && deplibs="$add_dir $deplibs"
+	      test -n "$add" && deplibs="$add $deplibs"
+	      if test yes != "$hardcode_direct" &&
+		 test yes != "$hardcode_minus_L" &&
+		 test yes = "$hardcode_shlibpath_var"; then
+		case :$finalize_shlibpath: in
+		*":$libdir:"*) ;;
+		*) func_append finalize_shlibpath "$libdir:" ;;
+		esac
+	      fi
+	    fi
+	  fi
+
+	  if test prog = "$linkmode" || test relink = "$opt_mode"; then
+	    add_shlibpath=
+	    add_dir=
+	    add=
+	    # Finalize command for both is simple: just hardcode it.
+	    if test yes = "$hardcode_direct" &&
+	       test no = "$hardcode_direct_absolute"; then
+	      add=$libdir/$linklib
+	    elif test yes = "$hardcode_minus_L"; then
+	      add_dir=-L$libdir
+	      add=-l$name
+	    elif test yes = "$hardcode_shlibpath_var"; then
+	      case :$finalize_shlibpath: in
+	      *":$libdir:"*) ;;
+	      *) func_append finalize_shlibpath "$libdir:" ;;
+	      esac
+	      add=-l$name
+	    elif test yes = "$hardcode_automatic"; then
+	      if test -n "$inst_prefix_dir" &&
+		 test -f "$inst_prefix_dir$libdir/$linklib"; then
+		add=$inst_prefix_dir$libdir/$linklib
+	      else
+		add=$libdir/$linklib
+	      fi
+	    else
+	      # We cannot seem to hardcode it, guess we'll fake it.
+	      add_dir=-L$libdir
+	      # Try looking first in the location we're being installed to.
+	      if test -n "$inst_prefix_dir"; then
+		case $libdir in
+		  [\\/]*)
+		    func_append add_dir " -L$inst_prefix_dir$libdir"
+		    ;;
+		esac
+	      fi
+	      add=-l$name
+	    fi
+
+	    if test prog = "$linkmode"; then
+	      test -n "$add_dir" && finalize_deplibs="$add_dir $finalize_deplibs"
+	      test -n "$add" && finalize_deplibs="$add $finalize_deplibs"
+	    else
+	      test -n "$add_dir" && deplibs="$add_dir $deplibs"
+	      test -n "$add" && deplibs="$add $deplibs"
+	    fi
+	  fi
+	elif test prog = "$linkmode"; then
+	  # Here we assume that one of hardcode_direct or hardcode_minus_L
+	  # is not unsupported.  This is valid on all known static and
+	  # shared platforms.
+	  if test unsupported != "$hardcode_direct"; then
+	    test -n "$old_library" && linklib=$old_library
+	    compile_deplibs="$dir/$linklib $compile_deplibs"
+	    finalize_deplibs="$dir/$linklib $finalize_deplibs"
+	  else
+	    compile_deplibs="-l$name -L$dir $compile_deplibs"
+	    finalize_deplibs="-l$name -L$dir $finalize_deplibs"
+	  fi
+	elif test yes = "$build_libtool_libs"; then
+	  # Not a shared library
+	  if test pass_all != "$deplibs_check_method"; then
+	    # We're trying link a shared library against a static one
+	    # but the system doesn't support it.
+
+	    # Just print a warning and add the library to dependency_libs so
+	    # that the program can be linked against the static library.
+	    echo
+	    $ECHO "*** Warning: This system cannot link to static lib archive $lib."
+	    echo "*** I have the capability to make that library automatically link in when"
+	    echo "*** you link to this library.  But I can only do this if you have a"
+	    echo "*** shared version of the library, which you do not appear to have."
+	    if test yes = "$module"; then
+	      echo "*** But as you try to build a module library, libtool will still create "
+	      echo "*** a static module, that should work as long as the dlopening application"
+	      echo "*** is linked with the -dlopen flag to resolve symbols at runtime."
+	      if test -z "$global_symbol_pipe"; then
+		echo
+		echo "*** However, this would only work if libtool was able to extract symbol"
+		echo "*** lists from a program, using 'nm' or equivalent, but libtool could"
+		echo "*** not find such a program.  So, this module is probably useless."
+		echo "*** 'nm' from GNU binutils and a full rebuild may help."
+	      fi
+	      if test no = "$build_old_libs"; then
+		build_libtool_libs=module
+		build_old_libs=yes
+	      else
+		build_libtool_libs=no
+	      fi
+	    fi
+	  else
+	    deplibs="$dir/$old_library $deplibs"
+	    link_static=yes
+	  fi
+	fi # link shared/static library?
+
+	if test lib = "$linkmode"; then
+	  if test -n "$dependency_libs" &&
+	     { test yes != "$hardcode_into_libs" ||
+	       test yes = "$build_old_libs" ||
+	       test yes = "$link_static"; }; then
+	    # Extract -R from dependency_libs
+	    temp_deplibs=
+	    for libdir in $dependency_libs; do
+	      case $libdir in
+	      -R*) func_stripname '-R' '' "$libdir"
+	           temp_xrpath=$func_stripname_result
+		   case " $xrpath " in
+		   *" $temp_xrpath "*) ;;
+		   *) func_append xrpath " $temp_xrpath";;
+		   esac;;
+	      *) func_append temp_deplibs " $libdir";;
+	      esac
+	    done
+	    dependency_libs=$temp_deplibs
+	  fi
+
+	  func_append newlib_search_path " $absdir"
+	  # Link against this library
+	  test no = "$link_static" && newdependency_libs="$abs_ladir/$laname $newdependency_libs"
+	  # ... and its dependency_libs
+	  tmp_libs=
+	  for deplib in $dependency_libs; do
+	    newdependency_libs="$deplib $newdependency_libs"
+	    case $deplib in
+              -L*) func_stripname '-L' '' "$deplib"
+                   func_resolve_sysroot "$func_stripname_result";;
+              *) func_resolve_sysroot "$deplib" ;;
+            esac
+	    if $opt_preserve_dup_deps; then
+	      case "$tmp_libs " in
+	      *" $func_resolve_sysroot_result "*)
+                func_append specialdeplibs " $func_resolve_sysroot_result" ;;
+	      esac
+	    fi
+	    func_append tmp_libs " $func_resolve_sysroot_result"
+	  done
+
+	  if test no != "$link_all_deplibs"; then
+	    # Add the search paths of all dependency libraries
+	    for deplib in $dependency_libs; do
+	      path=
+	      case $deplib in
+	      -L*) path=$deplib ;;
+	      *.la)
+	        func_resolve_sysroot "$deplib"
+	        deplib=$func_resolve_sysroot_result
+	        func_dirname "$deplib" "" "."
+		dir=$func_dirname_result
+		# We need an absolute path.
+		case $dir in
+		[\\/]* | [A-Za-z]:[\\/]*) absdir=$dir ;;
+		*)
+		  absdir=`cd "$dir" && pwd`
+		  if test -z "$absdir"; then
+		    func_warning "cannot determine absolute directory name of '$dir'"
+		    absdir=$dir
+		  fi
+		  ;;
+		esac
+		if $GREP "^installed=no" $deplib > /dev/null; then
+		case $host in
+		*-*-darwin*)
+		  depdepl=
+		  eval deplibrary_names=`$SED -n -e 's/^library_names=\(.*\)$/\1/p' $deplib`
+		  if test -n "$deplibrary_names"; then
+		    for tmp in $deplibrary_names; do
+		      depdepl=$tmp
+		    done
+		    if test -f "$absdir/$objdir/$depdepl"; then
+		      depdepl=$absdir/$objdir/$depdepl
+		      darwin_install_name=`$OTOOL -L $depdepl | awk '{if (NR == 2) {print $1;exit}}'`
+                      if test -z "$darwin_install_name"; then
+                          darwin_install_name=`$OTOOL64 -L $depdepl  | awk '{if (NR == 2) {print $1;exit}}'`
+                      fi
+		      func_append compiler_flags " $wl-dylib_file $wl$darwin_install_name:$depdepl"
+		      func_append linker_flags " -dylib_file $darwin_install_name:$depdepl"
+		      path=
+		    fi
+		  fi
+		  ;;
+		*)
+		  path=-L$absdir/$objdir
+		  ;;
+		esac
+		else
+		  eval libdir=`$SED -n -e 's/^libdir=\(.*\)$/\1/p' $deplib`
+		  test -z "$libdir" && \
+		    func_fatal_error "'$deplib' is not a valid libtool archive"
+		  test "$absdir" != "$libdir" && \
+		    func_warning "'$deplib' seems to be moved"
+
+		  path=-L$absdir
+		fi
+		;;
+	      esac
+	      case " $deplibs " in
+	      *" $path "*) ;;
+	      *) deplibs="$path $deplibs" ;;
+	      esac
+	    done
+	  fi # link_all_deplibs != no
+	fi # linkmode = lib
+      done # for deplib in $libs
+      if test link = "$pass"; then
+	if test prog = "$linkmode"; then
+	  compile_deplibs="$new_inherited_linker_flags $compile_deplibs"
+	  finalize_deplibs="$new_inherited_linker_flags $finalize_deplibs"
+	else
+	  compiler_flags="$compiler_flags "`$ECHO " $new_inherited_linker_flags" | $SED 's% \([^ $]*\).ltframework% -framework \1%g'`
+	fi
+      fi
+      dependency_libs=$newdependency_libs
+      if test dlpreopen = "$pass"; then
+	# Link the dlpreopened libraries before other libraries
+	for deplib in $save_deplibs; do
+	  deplibs="$deplib $deplibs"
+	done
+      fi
+      if test dlopen != "$pass"; then
+	test conv = "$pass" || {
+	  # Make sure lib_search_path contains only unique directories.
+	  lib_search_path=
+	  for dir in $newlib_search_path; do
+	    case "$lib_search_path " in
+	    *" $dir "*) ;;
+	    *) func_append lib_search_path " $dir" ;;
+	    esac
+	  done
+	  newlib_search_path=
+	}
+
+	if test prog,link = "$linkmode,$pass"; then
+	  vars="compile_deplibs finalize_deplibs"
+	else
+	  vars=deplibs
+	fi
+	for var in $vars dependency_libs; do
+	  # Add libraries to $var in reverse order
+	  eval tmp_libs=\"\$$var\"
+	  new_libs=
+	  for deplib in $tmp_libs; do
+	    # FIXME: Pedantically, this is the right thing to do, so
+	    #        that some nasty dependency loop isn't accidentally
+	    #        broken:
+	    #new_libs="$deplib $new_libs"
+	    # Pragmatically, this seems to cause very few problems in
+	    # practice:
+	    case $deplib in
+	    -L*) new_libs="$deplib $new_libs" ;;
+	    -R*) ;;
+	    *)
+	      # And here is the reason: when a library appears more
+	      # than once as an explicit dependence of a library, or
+	      # is implicitly linked in more than once by the
+	      # compiler, it is considered special, and multiple
+	      # occurrences thereof are not removed.  Compare this
+	      # with having the same library being listed as a
+	      # dependency of multiple other libraries: in this case,
+	      # we know (pedantically, we assume) the library does not
+	      # need to be listed more than once, so we keep only the
+	      # last copy.  This is not always right, but it is rare
+	      # enough that we require users that really mean to play
+	      # such unportable linking tricks to link the library
+	      # using -Wl,-lname, so that libtool does not consider it
+	      # for duplicate removal.
+	      case " $specialdeplibs " in
+	      *" $deplib "*) new_libs="$deplib $new_libs" ;;
+	      *)
+		case " $new_libs " in
+		*" $deplib "*) ;;
+		*) new_libs="$deplib $new_libs" ;;
+		esac
+		;;
+	      esac
+	      ;;
+	    esac
+	  done
+	  tmp_libs=
+	  for deplib in $new_libs; do
+	    case $deplib in
+	    -L*)
+	      case " $tmp_libs " in
+	      *" $deplib "*) ;;
+	      *) func_append tmp_libs " $deplib" ;;
+	      esac
+	      ;;
+	    *) func_append tmp_libs " $deplib" ;;
+	    esac
+	  done
+	  eval $var=\"$tmp_libs\"
+	done # for var
+      fi
+
+      # Add Sun CC postdeps if required:
+      test CXX = "$tagname" && {
+        case $host_os in
+        linux*)
+          case `$CC -V 2>&1 | sed 5q` in
+          *Sun\ C*) # Sun C++ 5.9
+            func_suncc_cstd_abi
+
+            if test no != "$suncc_use_cstd_abi"; then
+              func_append postdeps ' -library=Cstd -library=Crun'
+            fi
+            ;;
+          esac
+          ;;
+
+        solaris*)
+          func_cc_basename "$CC"
+          case $func_cc_basename_result in
+          CC* | sunCC*)
+            func_suncc_cstd_abi
+
+            if test no != "$suncc_use_cstd_abi"; then
+              func_append postdeps ' -library=Cstd -library=Crun'
+            fi
+            ;;
+          esac
+          ;;
+        esac
+      }
+
+      # Last step: remove runtime libs from dependency_libs
+      # (they stay in deplibs)
+      tmp_libs=
+      for i in $dependency_libs; do
+	case " $predeps $postdeps $compiler_lib_search_path " in
+	*" $i "*)
+	  i=
+	  ;;
+	esac
+	if test -n "$i"; then
+	  func_append tmp_libs " $i"
+	fi
+      done
+      dependency_libs=$tmp_libs
+    done # for pass
+    if test prog = "$linkmode"; then
+      dlfiles=$newdlfiles
+    fi
+    if test prog = "$linkmode" || test lib = "$linkmode"; then
+      dlprefiles=$newdlprefiles
+    fi
+
+    case $linkmode in
+    oldlib)
+      if test -n "$dlfiles$dlprefiles" || test no != "$dlself"; then
+	func_warning "'-dlopen' is ignored for archives"
+      fi
+
+      case " $deplibs" in
+      *\ -l* | *\ -L*)
+	func_warning "'-l' and '-L' are ignored for archives" ;;
+      esac
+
+      test -n "$rpath" && \
+	func_warning "'-rpath' is ignored for archives"
+
+      test -n "$xrpath" && \
+	func_warning "'-R' is ignored for archives"
+
+      test -n "$vinfo" && \
+	func_warning "'-version-info/-version-number' is ignored for archives"
+
+      test -n "$release" && \
+	func_warning "'-release' is ignored for archives"
+
+      test -n "$export_symbols$export_symbols_regex" && \
+	func_warning "'-export-symbols' is ignored for archives"
+
+      # Now set the variables for building old libraries.
+      build_libtool_libs=no
+      oldlibs=$output
+      func_append objs "$old_deplibs"
+      ;;
+
+    lib)
+      # Make sure we only generate libraries of the form 'libNAME.la'.
+      case $outputname in
+      lib*)
+	func_stripname 'lib' '.la' "$outputname"
+	name=$func_stripname_result
+	eval shared_ext=\"$shrext_cmds\"
+	eval libname=\"$libname_spec\"
+	;;
+      *)
+	test no = "$module" \
+	  && func_fatal_help "libtool library '$output' must begin with 'lib'"
+
+	if test no != "$need_lib_prefix"; then
+	  # Add the "lib" prefix for modules if required
+	  func_stripname '' '.la' "$outputname"
+	  name=$func_stripname_result
+	  eval shared_ext=\"$shrext_cmds\"
+	  eval libname=\"$libname_spec\"
+	else
+	  func_stripname '' '.la' "$outputname"
+	  libname=$func_stripname_result
+	fi
+	;;
+      esac
+
+      if test -n "$objs"; then
+	if test pass_all != "$deplibs_check_method"; then
+	  func_fatal_error "cannot build libtool library '$output' from non-libtool objects on this host:$objs"
+	else
+	  echo
+	  $ECHO "*** Warning: Linking the shared library $output against the non-libtool"
+	  $ECHO "*** objects $objs is not portable!"
+	  func_append libobjs " $objs"
+	fi
+      fi
+
+      test no = "$dlself" \
+	|| func_warning "'-dlopen self' is ignored for libtool libraries"
+
+      set dummy $rpath
+      shift
+      test 1 -lt "$#" \
+	&& func_warning "ignoring multiple '-rpath's for a libtool library"
+
+      install_libdir=$1
+
+      oldlibs=
+      if test -z "$rpath"; then
+	if test yes = "$build_libtool_libs"; then
+	  # Building a libtool convenience library.
+	  # Some compilers have problems with a '.al' extension so
+	  # convenience libraries should have the same extension an
+	  # archive normally would.
+	  oldlibs="$output_objdir/$libname.$libext $oldlibs"
+	  build_libtool_libs=convenience
+	  build_old_libs=yes
+	fi
+
+	test -n "$vinfo" && \
+	  func_warning "'-version-info/-version-number' is ignored for convenience libraries"
+
+	test -n "$release" && \
+	  func_warning "'-release' is ignored for convenience libraries"
+      else
+
+	# Parse the version information argument.
+	save_ifs=$IFS; IFS=:
+	set dummy $vinfo 0 0 0
+	shift
+	IFS=$save_ifs
+
+	test -n "$7" && \
+	  func_fatal_help "too many parameters to '-version-info'"
+
+	# convert absolute version numbers to libtool ages
+	# this retains compatibility with .la files and attempts
+	# to make the code below a bit more comprehensible
+
+	case $vinfo_number in
+	yes)
+	  number_major=$1
+	  number_minor=$2
+	  number_revision=$3
+	  #
+	  # There are really only two kinds -- those that
+	  # use the current revision as the major version
+	  # and those that subtract age and use age as
+	  # a minor version.  But, then there is irix
+	  # that has an extra 1 added just for fun
+	  #
+	  case $version_type in
+	  # correct linux to gnu/linux during the next big refactor
+	  darwin|freebsd-elf|linux|osf|windows|none)
+	    func_arith $number_major + $number_minor
+	    current=$func_arith_result
+	    age=$number_minor
+	    revision=$number_revision
+	    ;;
+	  freebsd-aout|qnx|sunos)
+	    current=$number_major
+	    revision=$number_minor
+	    age=0
+	    ;;
+	  irix|nonstopux)
+	    func_arith $number_major + $number_minor
+	    current=$func_arith_result
+	    age=$number_minor
+	    revision=$number_minor
+	    lt_irix_increment=no
+	    ;;
+	  *)
+	    func_fatal_configuration "$modename: unknown library version type '$version_type'"
+	    ;;
+	  esac
+	  ;;
+	no)
+	  current=$1
+	  revision=$2
+	  age=$3
+	  ;;
+	esac
+
+	# Check that each of the things are valid numbers.
+	case $current in
+	0|[1-9]|[1-9][0-9]|[1-9][0-9][0-9]|[1-9][0-9][0-9][0-9]|[1-9][0-9][0-9][0-9][0-9]) ;;
+	*)
+	  func_error "CURRENT '$current' must be a nonnegative integer"
+	  func_fatal_error "'$vinfo' is not valid version information"
+	  ;;
+	esac
+
+	case $revision in
+	0|[1-9]|[1-9][0-9]|[1-9][0-9][0-9]|[1-9][0-9][0-9][0-9]|[1-9][0-9][0-9][0-9][0-9]) ;;
+	*)
+	  func_error "REVISION '$revision' must be a nonnegative integer"
+	  func_fatal_error "'$vinfo' is not valid version information"
+	  ;;
+	esac
+
+	case $age in
+	0|[1-9]|[1-9][0-9]|[1-9][0-9][0-9]|[1-9][0-9][0-9][0-9]|[1-9][0-9][0-9][0-9][0-9]) ;;
+	*)
+	  func_error "AGE '$age' must be a nonnegative integer"
+	  func_fatal_error "'$vinfo' is not valid version information"
+	  ;;
+	esac
+
+	if test "$age" -gt "$current"; then
+	  func_error "AGE '$age' is greater than the current interface number '$current'"
+	  func_fatal_error "'$vinfo' is not valid version information"
+	fi
+
+	# Calculate the version variables.
+	major=
+	versuffix=
+	verstring=
+	case $version_type in
+	none) ;;
+
+	darwin)
+	  # Like Linux, but with the current version available in
+	  # verstring for coding it into the library header
+	  func_arith $current - $age
+	  major=.$func_arith_result
+	  versuffix=$major.$age.$revision
+	  # Darwin ld doesn't like 0 for these options...
+	  func_arith $current + 1
+	  minor_current=$func_arith_result
+	  xlcverstring="$wl-compatibility_version $wl$minor_current $wl-current_version $wl$minor_current.$revision"
+	  verstring="-compatibility_version $minor_current -current_version $minor_current.$revision"
+          # On Darwin other compilers
+          case $CC in
+              nagfor*)
+                  verstring="$wl-compatibility_version $wl$minor_current $wl-current_version $wl$minor_current.$revision"
+                  ;;
+              *)
+                  verstring="-compatibility_version $minor_current -current_version $minor_current.$revision"
+                  ;;
+          esac
+	  ;;
+
+	freebsd-aout)
+	  major=.$current
+	  versuffix=.$current.$revision
+	  ;;
+
+	freebsd-elf)
+	  func_arith $current - $age
+	  major=.$func_arith_result
+	  versuffix=$major.$age.$revision
+	  ;;
+
+	irix | nonstopux)
+	  if test no = "$lt_irix_increment"; then
+	    func_arith $current - $age
+	  else
+	    func_arith $current - $age + 1
+	  fi
+	  major=$func_arith_result
+
+	  case $version_type in
+	    nonstopux) verstring_prefix=nonstopux ;;
+	    *)         verstring_prefix=sgi ;;
+	  esac
+	  verstring=$verstring_prefix$major.$revision
+
+	  # Add in all the interfaces that we are compatible with.
+	  loop=$revision
+	  while test 0 -ne "$loop"; do
+	    func_arith $revision - $loop
+	    iface=$func_arith_result
+	    func_arith $loop - 1
+	    loop=$func_arith_result
+	    verstring=$verstring_prefix$major.$iface:$verstring
+	  done
+
+	  # Before this point, $major must not contain '.'.
+	  major=.$major
+	  versuffix=$major.$revision
+	  ;;
+
+	linux) # correct to gnu/linux during the next big refactor
+	  func_arith $current - $age
+	  major=.$func_arith_result
+	  versuffix=$major.$age.$revision
+	  ;;
+
+	osf)
+	  func_arith $current - $age
+	  major=.$func_arith_result
+	  versuffix=.$current.$age.$revision
+	  verstring=$current.$age.$revision
+
+	  # Add in all the interfaces that we are compatible with.
+	  loop=$age
+	  while test 0 -ne "$loop"; do
+	    func_arith $current - $loop
+	    iface=$func_arith_result
+	    func_arith $loop - 1
+	    loop=$func_arith_result
+	    verstring=$verstring:$iface.0
+	  done
+
+	  # Make executables depend on our current version.
+	  func_append verstring ":$current.0"
+	  ;;
+
+	qnx)
+	  major=.$current
+	  versuffix=.$current
+	  ;;
+
+	sco)
+	  major=.$current
+	  versuffix=.$current
+	  ;;
+
+	sunos)
+	  major=.$current
+	  versuffix=.$current.$revision
+	  ;;
+
+	windows)
+	  # Use '-' rather than '.', since we only want one
+	  # extension on DOS 8.3 file systems.
+	  func_arith $current - $age
+	  major=$func_arith_result
+	  versuffix=-$major
+	  ;;
+
+	*)
+	  func_fatal_configuration "unknown library version type '$version_type'"
+	  ;;
+	esac
+
+	# Clear the version info if we defaulted, and they specified a release.
+	if test -z "$vinfo" && test -n "$release"; then
+	  major=
+	  case $version_type in
+	  darwin)
+	    # we can't check for "0.0" in archive_cmds due to quoting
+	    # problems, so we reset it completely
+	    verstring=
+	    ;;
+	  *)
+	    verstring=0.0
+	    ;;
+	  esac
+	  if test no = "$need_version"; then
+	    versuffix=
+	  else
+	    versuffix=.0.0
+	  fi
+	fi
+
+	# Remove version info from name if versioning should be avoided
+	if test yes,no = "$avoid_version,$need_version"; then
+	  major=
+	  versuffix=
+	  verstring=
+	fi
+
+	# Check to see if the archive will have undefined symbols.
+	if test yes = "$allow_undefined"; then
+	  if test unsupported = "$allow_undefined_flag"; then
+	    if test yes = "$build_old_libs"; then
+	      func_warning "undefined symbols not allowed in $host shared libraries; building static only"
+	      build_libtool_libs=no
+	    else
+	      func_fatal_error "can't build $host shared library unless -no-undefined is specified"
+	    fi
+	  fi
+	else
+	  # Don't allow undefined symbols.
+	  allow_undefined_flag=$no_undefined_flag
+	fi
+
+      fi
+
+      func_generate_dlsyms "$libname" "$libname" :
+      func_append libobjs " $symfileobj"
+      test " " = "$libobjs" && libobjs=
+
+      if test relink != "$opt_mode"; then
+	# Remove our outputs, but don't remove object files since they
+	# may have been created when compiling PIC objects.
+	removelist=
+	tempremovelist=`$ECHO "$output_objdir/*"`
+	for p in $tempremovelist; do
+	  case $p in
+	    *.$objext | *.gcno)
+	       ;;
+	    $output_objdir/$outputname | $output_objdir/$libname.* | $output_objdir/$libname$release.*)
+	       if test -n "$precious_files_regex"; then
+		 if $ECHO "$p" | $EGREP -e "$precious_files_regex" >/dev/null 2>&1
+		 then
+		   continue
+		 fi
+	       fi
+	       func_append removelist " $p"
+	       ;;
+	    *) ;;
+	  esac
+	done
+	test -n "$removelist" && \
+	  func_show_eval "${RM}r \$removelist"
+      fi
+
+      # Now set the variables for building old libraries.
+      if test yes = "$build_old_libs" && test convenience != "$build_libtool_libs"; then
+	func_append oldlibs " $output_objdir/$libname.$libext"
+
+	# Transform .lo files to .o files.
+	oldobjs="$objs "`$ECHO "$libobjs" | $SP2NL | $SED "/\.$libext$/d; $lo2o" | $NL2SP`
+      fi
+
+      # Eliminate all temporary directories.
+      #for path in $notinst_path; do
+      #	lib_search_path=`$ECHO "$lib_search_path " | $SED "s% $path % %g"`
+      #	deplibs=`$ECHO "$deplibs " | $SED "s% -L$path % %g"`
+      #	dependency_libs=`$ECHO "$dependency_libs " | $SED "s% -L$path % %g"`
+      #done
+
+      if test -n "$xrpath"; then
+	# If the user specified any rpath flags, then add them.
+	temp_xrpath=
+	for libdir in $xrpath; do
+	  func_replace_sysroot "$libdir"
+	  func_append temp_xrpath " -R$func_replace_sysroot_result"
+	  case "$finalize_rpath " in
+	  *" $libdir "*) ;;
+	  *) func_append finalize_rpath " $libdir" ;;
+	  esac
+	done
+	if test yes != "$hardcode_into_libs" || test yes = "$build_old_libs"; then
+	  dependency_libs="$temp_xrpath $dependency_libs"
+	fi
+      fi
+
+      # Make sure dlfiles contains only unique files that won't be dlpreopened
+      old_dlfiles=$dlfiles
+      dlfiles=
+      for lib in $old_dlfiles; do
+	case " $dlprefiles $dlfiles " in
+	*" $lib "*) ;;
+	*) func_append dlfiles " $lib" ;;
+	esac
+      done
+
+      # Make sure dlprefiles contains only unique files
+      old_dlprefiles=$dlprefiles
+      dlprefiles=
+      for lib in $old_dlprefiles; do
+	case "$dlprefiles " in
+	*" $lib "*) ;;
+	*) func_append dlprefiles " $lib" ;;
+	esac
+      done
+
+      if test yes = "$build_libtool_libs"; then
+	if test -n "$rpath"; then
+	  case $host in
+	  *-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-os2* | *-*-beos* | *-cegcc* | *-*-haiku*)
+	    # these systems don't actually have a c library (as such)!
+	    ;;
+	  *-*-rhapsody* | *-*-darwin1.[012])
+	    # Rhapsody C library is in the System framework
+	    func_append deplibs " System.ltframework"
+	    ;;
+	  *-*-netbsd*)
+	    # Don't link with libc until the a.out ld.so is fixed.
+	    ;;
+	  *-*-openbsd* | *-*-freebsd* | *-*-dragonfly*)
+	    # Do not include libc due to us having libc/libc_r.
+	    ;;
+	  *-*-sco3.2v5* | *-*-sco5v6*)
+	    # Causes problems with __ctype
+	    ;;
+	  *-*-sysv4.2uw2* | *-*-sysv5* | *-*-unixware* | *-*-OpenUNIX*)
+	    # Compiler inserts libc in the correct place for threads to work
+	    ;;
+	  *)
+	    # Add libc to deplibs on all other systems if necessary.
+	    if test yes = "$build_libtool_need_lc"; then
+	      func_append deplibs " -lc"
+	    fi
+	    ;;
+	  esac
+	fi
+
+	# Transform deplibs into only deplibs that can be linked in shared.
+	name_save=$name
+	libname_save=$libname
+	release_save=$release
+	versuffix_save=$versuffix
+	major_save=$major
+	# I'm not sure if I'm treating the release correctly.  I think
+	# release should show up in the -l (ie -lgmp5) so we don't want to
+	# add it in twice.  Is that correct?
+	release=
+	versuffix=
+	major=
+	newdeplibs=
+	droppeddeps=no
+	case $deplibs_check_method in
+	pass_all)
+	  # Don't check for shared/static.  Everything works.
+	  # This might be a little naive.  We might want to check
+	  # whether the library exists or not.  But this is on
+	  # osf3 & osf4 and I'm not really sure... Just
+	  # implementing what was already the behavior.
+	  newdeplibs=$deplibs
+	  ;;
+	test_compile)
+	  # This code stresses the "libraries are programs" paradigm to its
+	  # limits. Maybe even breaks it.  We compile a program, linking it
+	  # against the deplibs as a proxy for the library.  Then we can check
+	  # whether they linked in statically or dynamically with ldd.
+	  $opt_dry_run || $RM conftest.c
+	  cat > conftest.c <<EOF
+	  int main() { return 0; }
+EOF
+	  $opt_dry_run || $RM conftest
+	  if $LTCC $LTCFLAGS -o conftest conftest.c $deplibs; then
+	    ldd_output=`ldd conftest`
+	    for i in $deplibs; do
+	      case $i in
+	      -l*)
+		func_stripname -l '' "$i"
+		name=$func_stripname_result
+		if test yes = "$allow_libtool_libs_with_static_runtimes"; then
+		  case " $predeps $postdeps " in
+		  *" $i "*)
+		    func_append newdeplibs " $i"
+		    i=
+		    ;;
+		  esac
+		fi
+		if test -n "$i"; then
+		  libname=`eval "\\$ECHO \"$libname_spec\""`
+		  deplib_matches=`eval "\\$ECHO \"$library_names_spec\""`
+		  set dummy $deplib_matches; shift
+		  deplib_match=$1
+		  if test `expr "$ldd_output" : ".*$deplib_match"` -ne 0; then
+		    func_append newdeplibs " $i"
+		  else
+		    droppeddeps=yes
+		    echo
+		    $ECHO "*** Warning: dynamic linker does not accept needed library $i."
+		    echo "*** I have the capability to make that library automatically link in when"
+		    echo "*** you link to this library.  But I can only do this if you have a"
+		    echo "*** shared version of the library, which I believe you do not have"
+		    echo "*** because a test_compile did reveal that the linker did not use it for"
+		    echo "*** its dynamic dependency list that programs get resolved with at runtime."
+		  fi
+		fi
+		;;
+	      *)
+		func_append newdeplibs " $i"
+		;;
+	      esac
+	    done
+	  else
+	    # Error occurred in the first compile.  Let's try to salvage
+	    # the situation: Compile a separate program for each library.
+	    for i in $deplibs; do
+	      case $i in
+	      -l*)
+		func_stripname -l '' "$i"
+		name=$func_stripname_result
+		$opt_dry_run || $RM conftest
+		if $LTCC $LTCFLAGS -o conftest conftest.c $i; then
+		  ldd_output=`ldd conftest`
+		  if test yes = "$allow_libtool_libs_with_static_runtimes"; then
+		    case " $predeps $postdeps " in
+		    *" $i "*)
+		      func_append newdeplibs " $i"
+		      i=
+		      ;;
+		    esac
+		  fi
+		  if test -n "$i"; then
+		    libname=`eval "\\$ECHO \"$libname_spec\""`
+		    deplib_matches=`eval "\\$ECHO \"$library_names_spec\""`
+		    set dummy $deplib_matches; shift
+		    deplib_match=$1
+		    if test `expr "$ldd_output" : ".*$deplib_match"` -ne 0; then
+		      func_append newdeplibs " $i"
+		    else
+		      droppeddeps=yes
+		      echo
+		      $ECHO "*** Warning: dynamic linker does not accept needed library $i."
+		      echo "*** I have the capability to make that library automatically link in when"
+		      echo "*** you link to this library.  But I can only do this if you have a"
+		      echo "*** shared version of the library, which you do not appear to have"
+		      echo "*** because a test_compile did reveal that the linker did not use this one"
+		      echo "*** as a dynamic dependency that programs can get resolved with at runtime."
+		    fi
+		  fi
+		else
+		  droppeddeps=yes
+		  echo
+		  $ECHO "*** Warning!  Library $i is needed by this library but I was not able to"
+		  echo "*** make it link in!  You will probably need to install it or some"
+		  echo "*** library that it depends on before this library will be fully"
+		  echo "*** functional.  Installing it before continuing would be even better."
+		fi
+		;;
+	      *)
+		func_append newdeplibs " $i"
+		;;
+	      esac
+	    done
+	  fi
+	  ;;
+	file_magic*)
+	  set dummy $deplibs_check_method; shift
+	  file_magic_regex=`expr "$deplibs_check_method" : "$1 \(.*\)"`
+	  for a_deplib in $deplibs; do
+	    case $a_deplib in
+	    -l*)
+	      func_stripname -l '' "$a_deplib"
+	      name=$func_stripname_result
+	      if test yes = "$allow_libtool_libs_with_static_runtimes"; then
+		case " $predeps $postdeps " in
+		*" $a_deplib "*)
+		  func_append newdeplibs " $a_deplib"
+		  a_deplib=
+		  ;;
+		esac
+	      fi
+	      if test -n "$a_deplib"; then
+		libname=`eval "\\$ECHO \"$libname_spec\""`
+		if test -n "$file_magic_glob"; then
+		  libnameglob=`func_echo_all "$libname" | $SED -e $file_magic_glob`
+		else
+		  libnameglob=$libname
+		fi
+		test yes = "$want_nocaseglob" && nocaseglob=`shopt -p nocaseglob`
+		for i in $lib_search_path $sys_lib_search_path $shlib_search_path; do
+		  if test yes = "$want_nocaseglob"; then
+		    shopt -s nocaseglob
+		    potential_libs=`ls $i/$libnameglob[.-]* 2>/dev/null`
+		    $nocaseglob
+		  else
+		    potential_libs=`ls $i/$libnameglob[.-]* 2>/dev/null`
+		  fi
+		  for potent_lib in $potential_libs; do
+		      # Follow soft links.
+		      if ls -lLd "$potent_lib" 2>/dev/null |
+			 $GREP " -> " >/dev/null; then
+			continue
+		      fi
+		      # The statement above tries to avoid entering an
+		      # endless loop below, in case of cyclic links.
+		      # We might still enter an endless loop, since a link
+		      # loop can be closed while we follow links,
+		      # but so what?
+		      potlib=$potent_lib
+		      while test -h "$potlib" 2>/dev/null; do
+			potliblink=`ls -ld $potlib | $SED 's/.* -> //'`
+			case $potliblink in
+			[\\/]* | [A-Za-z]:[\\/]*) potlib=$potliblink;;
+			*) potlib=`$ECHO "$potlib" | $SED 's|[^/]*$||'`"$potliblink";;
+			esac
+		      done
+		      if eval $file_magic_cmd \"\$potlib\" 2>/dev/null |
+			 $SED -e 10q |
+			 $EGREP "$file_magic_regex" > /dev/null; then
+			func_append newdeplibs " $a_deplib"
+			a_deplib=
+			break 2
+		      fi
+		  done
+		done
+	      fi
+	      if test -n "$a_deplib"; then
+		droppeddeps=yes
+		echo
+		$ECHO "*** Warning: linker path does not have real file for library $a_deplib."
+		echo "*** I have the capability to make that library automatically link in when"
+		echo "*** you link to this library.  But I can only do this if you have a"
+		echo "*** shared version of the library, which you do not appear to have"
+		echo "*** because I did check the linker path looking for a file starting"
+		if test -z "$potlib"; then
+		  $ECHO "*** with $libname but no candidates were found. (...for file magic test)"
+		else
+		  $ECHO "*** with $libname and none of the candidates passed a file format test"
+		  $ECHO "*** using a file magic. Last file checked: $potlib"
+		fi
+	      fi
+	      ;;
+	    *)
+	      # Add a -L argument.
+	      func_append newdeplibs " $a_deplib"
+	      ;;
+	    esac
+	  done # Gone through all deplibs.
+	  ;;
+	match_pattern*)
+	  set dummy $deplibs_check_method; shift
+	  match_pattern_regex=`expr "$deplibs_check_method" : "$1 \(.*\)"`
+	  for a_deplib in $deplibs; do
+	    case $a_deplib in
+	    -l*)
+	      func_stripname -l '' "$a_deplib"
+	      name=$func_stripname_result
+	      if test yes = "$allow_libtool_libs_with_static_runtimes"; then
+		case " $predeps $postdeps " in
+		*" $a_deplib "*)
+		  func_append newdeplibs " $a_deplib"
+		  a_deplib=
+		  ;;
+		esac
+	      fi
+	      if test -n "$a_deplib"; then
+		libname=`eval "\\$ECHO \"$libname_spec\""`
+		for i in $lib_search_path $sys_lib_search_path $shlib_search_path; do
+		  potential_libs=`ls $i/$libname[.-]* 2>/dev/null`
+		  for potent_lib in $potential_libs; do
+		    potlib=$potent_lib # see symlink-check above in file_magic test
+		    if eval "\$ECHO \"$potent_lib\"" 2>/dev/null | $SED 10q | \
+		       $EGREP "$match_pattern_regex" > /dev/null; then
+		      func_append newdeplibs " $a_deplib"
+		      a_deplib=
+		      break 2
+		    fi
+		  done
+		done
+	      fi
+	      if test -n "$a_deplib"; then
+		droppeddeps=yes
+		echo
+		$ECHO "*** Warning: linker path does not have real file for library $a_deplib."
+		echo "*** I have the capability to make that library automatically link in when"
+		echo "*** you link to this library.  But I can only do this if you have a"
+		echo "*** shared version of the library, which you do not appear to have"
+		echo "*** because I did check the linker path looking for a file starting"
+		if test -z "$potlib"; then
+		  $ECHO "*** with $libname but no candidates were found. (...for regex pattern test)"
+		else
+		  $ECHO "*** with $libname and none of the candidates passed a file format test"
+		  $ECHO "*** using a regex pattern. Last file checked: $potlib"
+		fi
+	      fi
+	      ;;
+	    *)
+	      # Add a -L argument.
+	      func_append newdeplibs " $a_deplib"
+	      ;;
+	    esac
+	  done # Gone through all deplibs.
+	  ;;
+	none | unknown | *)
+	  newdeplibs=
+	  tmp_deplibs=`$ECHO " $deplibs" | $SED 's/ -lc$//; s/ -[LR][^ ]*//g'`
+	  if test yes = "$allow_libtool_libs_with_static_runtimes"; then
+	    for i in $predeps $postdeps; do
+	      # can't use Xsed below, because $i might contain '/'
+	      tmp_deplibs=`$ECHO " $tmp_deplibs" | $SED "s|$i||"`
+	    done
+	  fi
+	  case $tmp_deplibs in
+	  *[!\	\ ]*)
+	    echo
+	    if test none = "$deplibs_check_method"; then
+	      echo "*** Warning: inter-library dependencies are not supported in this platform."
+	    else
+	      echo "*** Warning: inter-library dependencies are not known to be supported."
+	    fi
+	    echo "*** All declared inter-library dependencies are being dropped."
+	    droppeddeps=yes
+	    ;;
+	  esac
+	  ;;
+	esac
+	versuffix=$versuffix_save
+	major=$major_save
+	release=$release_save
+	libname=$libname_save
+	name=$name_save
+
+	case $host in
+	*-*-rhapsody* | *-*-darwin1.[012])
+	  # On Rhapsody replace the C library with the System framework
+	  newdeplibs=`$ECHO " $newdeplibs" | $SED 's/ -lc / System.ltframework /'`
+	  ;;
+	esac
+
+	if test yes = "$droppeddeps"; then
+	  if test yes = "$module"; then
+	    echo
+	    echo "*** Warning: libtool could not satisfy all declared inter-library"
+	    $ECHO "*** dependencies of module $libname.  Therefore, libtool will create"
+	    echo "*** a static module, that should work as long as the dlopening"
+	    echo "*** application is linked with the -dlopen flag."
+	    if test -z "$global_symbol_pipe"; then
+	      echo
+	      echo "*** However, this would only work if libtool was able to extract symbol"
+	      echo "*** lists from a program, using 'nm' or equivalent, but libtool could"
+	      echo "*** not find such a program.  So, this module is probably useless."
+	      echo "*** 'nm' from GNU binutils and a full rebuild may help."
+	    fi
+	    if test no = "$build_old_libs"; then
+	      oldlibs=$output_objdir/$libname.$libext
+	      build_libtool_libs=module
+	      build_old_libs=yes
+	    else
+	      build_libtool_libs=no
+	    fi
+	  else
+	    echo "*** The inter-library dependencies that have been dropped here will be"
+	    echo "*** automatically added whenever a program is linked with this library"
+	    echo "*** or is declared to -dlopen it."
+
+	    if test no = "$allow_undefined"; then
+	      echo
+	      echo "*** Since this library must not contain undefined symbols,"
+	      echo "*** because either the platform does not support them or"
+	      echo "*** it was explicitly requested with -no-undefined,"
+	      echo "*** libtool will only create a static version of it."
+	      if test no = "$build_old_libs"; then
+		oldlibs=$output_objdir/$libname.$libext
+		build_libtool_libs=module
+		build_old_libs=yes
+	      else
+		build_libtool_libs=no
+	      fi
+	    fi
+	  fi
+	fi
+	# Done checking deplibs!
+	deplibs=$newdeplibs
+      fi
+      # Time to change all our "foo.ltframework" stuff back to "-framework foo"
+      case $host in
+	*-*-darwin*)
+	  newdeplibs=`$ECHO " $newdeplibs" | $SED 's% \([^ $]*\).ltframework% -framework \1%g'`
+	  new_inherited_linker_flags=`$ECHO " $new_inherited_linker_flags" | $SED 's% \([^ $]*\).ltframework% -framework \1%g'`
+	  deplibs=`$ECHO " $deplibs" | $SED 's% \([^ $]*\).ltframework% -framework \1%g'`
+	  ;;
+      esac
+
+      # move library search paths that coincide with paths to not yet
+      # installed libraries to the beginning of the library search list
+      new_libs=
+      for path in $notinst_path; do
+	case " $new_libs " in
+	*" -L$path/$objdir "*) ;;
+	*)
+	  case " $deplibs " in
+	  *" -L$path/$objdir "*)
+	    func_append new_libs " -L$path/$objdir" ;;
+	  esac
+	  ;;
+	esac
+      done
+      for deplib in $deplibs; do
+	case $deplib in
+	-L*)
+	  case " $new_libs " in
+	  *" $deplib "*) ;;
+	  *) func_append new_libs " $deplib" ;;
+	  esac
+	  ;;
+	*) func_append new_libs " $deplib" ;;
+	esac
+      done
+      deplibs=$new_libs
+
+      # All the library-specific variables (install_libdir is set above).
+      library_names=
+      old_library=
+      dlname=
+
+      # Test again, we may have decided not to build it any more
+      if test yes = "$build_libtool_libs"; then
+	# Remove $wl instances when linking with ld.
+	# FIXME: should test the right _cmds variable.
+	case $archive_cmds in
+	  *\$LD\ *) wl= ;;
+        esac
+	if test yes = "$hardcode_into_libs"; then
+	  # Hardcode the library paths
+	  hardcode_libdirs=
+	  dep_rpath=
+	  rpath=$finalize_rpath
+	  test relink = "$opt_mode" || rpath=$compile_rpath$rpath
+	  for libdir in $rpath; do
+	    if test -n "$hardcode_libdir_flag_spec"; then
+	      if test -n "$hardcode_libdir_separator"; then
+		func_replace_sysroot "$libdir"
+		libdir=$func_replace_sysroot_result
+		if test -z "$hardcode_libdirs"; then
+		  hardcode_libdirs=$libdir
+		else
+		  # Just accumulate the unique libdirs.
+		  case $hardcode_libdir_separator$hardcode_libdirs$hardcode_libdir_separator in
+		  *"$hardcode_libdir_separator$libdir$hardcode_libdir_separator"*)
+		    ;;
+		  *)
+		    func_append hardcode_libdirs "$hardcode_libdir_separator$libdir"
+		    ;;
+		  esac
+		fi
+	      else
+		eval flag=\"$hardcode_libdir_flag_spec\"
+		func_append dep_rpath " $flag"
+	      fi
+	    elif test -n "$runpath_var"; then
+	      case "$perm_rpath " in
+	      *" $libdir "*) ;;
+	      *) func_append perm_rpath " $libdir" ;;
+	      esac
+	    fi
+	  done
+	  # Substitute the hardcoded libdirs into the rpath.
+	  if test -n "$hardcode_libdir_separator" &&
+	     test -n "$hardcode_libdirs"; then
+	    libdir=$hardcode_libdirs
+	    eval "dep_rpath=\"$hardcode_libdir_flag_spec\""
+	  fi
+	  if test -n "$runpath_var" && test -n "$perm_rpath"; then
+	    # We should set the runpath_var.
+	    rpath=
+	    for dir in $perm_rpath; do
+	      func_append rpath "$dir:"
+	    done
+	    eval "$runpath_var='$rpath\$$runpath_var'; export $runpath_var"
+	  fi
+	  test -n "$dep_rpath" && deplibs="$dep_rpath $deplibs"
+	fi
+
+	shlibpath=$finalize_shlibpath
+	test relink = "$opt_mode" || shlibpath=$compile_shlibpath$shlibpath
+	if test -n "$shlibpath"; then
+	  eval "$shlibpath_var='$shlibpath\$$shlibpath_var'; export $shlibpath_var"
+	fi
+
+	# Get the real and link names of the library.
+	eval shared_ext=\"$shrext_cmds\"
+	eval library_names=\"$library_names_spec\"
+	set dummy $library_names
+	shift
+	realname=$1
+	shift
+
+	if test -n "$soname_spec"; then
+	  eval soname=\"$soname_spec\"
+	else
+	  soname=$realname
+	fi
+	if test -z "$dlname"; then
+	  dlname=$soname
+	fi
+
+	lib=$output_objdir/$realname
+	linknames=
+	for link
+	do
+	  func_append linknames " $link"
+	done
+
+	# Use standard objects if they are pic
+	test -z "$pic_flag" && libobjs=`$ECHO "$libobjs" | $SP2NL | $SED "$lo2o" | $NL2SP`
+	test "X$libobjs" = "X " && libobjs=
+
+	delfiles=
+	if test -n "$export_symbols" && test -n "$include_expsyms"; then
+	  $opt_dry_run || cp "$export_symbols" "$output_objdir/$libname.uexp"
+	  export_symbols=$output_objdir/$libname.uexp
+	  func_append delfiles " $export_symbols"
+	fi
+
+	orig_export_symbols=
+	case $host_os in
+	cygwin* | mingw* | cegcc*)
+	  if test -n "$export_symbols" && test -z "$export_symbols_regex"; then
+	    # exporting using user supplied symfile
+	    func_dll_def_p "$export_symbols" || {
+	      # and it's NOT already a .def file. Must figure out
+	      # which of the given symbols are data symbols and tag
+	      # them as such. So, trigger use of export_symbols_cmds.
+	      # export_symbols gets reassigned inside the "prepare
+	      # the list of exported symbols" if statement, so the
+	      # include_expsyms logic still works.
+	      orig_export_symbols=$export_symbols
+	      export_symbols=
+	      always_export_symbols=yes
+	    }
+	  fi
+	  ;;
+	esac
+
+	# Prepare the list of exported symbols
+	if test -z "$export_symbols"; then
+	  if test yes = "$always_export_symbols" || test -n "$export_symbols_regex"; then
+	    func_verbose "generating symbol list for '$libname.la'"
+	    export_symbols=$output_objdir/$libname.exp
+	    $opt_dry_run || $RM $export_symbols
+	    cmds=$export_symbols_cmds
+	    save_ifs=$IFS; IFS='~'
+	    for cmd1 in $cmds; do
+	      IFS=$save_ifs
+	      # Take the normal branch if the nm_file_list_spec branch
+	      # doesn't work or if tool conversion is not needed.
+	      case $nm_file_list_spec~$to_tool_file_cmd in
+		*~func_convert_file_noop | *~func_convert_file_msys_to_w32 | ~*)
+		  try_normal_branch=yes
+		  eval cmd=\"$cmd1\"
+		  func_len " $cmd"
+		  len=$func_len_result
+		  ;;
+		*)
+		  try_normal_branch=no
+		  ;;
+	      esac
+	      if test yes = "$try_normal_branch" \
+		 && { test "$len" -lt "$max_cmd_len" \
+		      || test "$max_cmd_len" -le -1; }
+	      then
+		func_show_eval "$cmd" 'exit $?'
+		skipped_export=false
+	      elif test -n "$nm_file_list_spec"; then
+		func_basename "$output"
+		output_la=$func_basename_result
+		save_libobjs=$libobjs
+		save_output=$output
+		output=$output_objdir/$output_la.nm
+		func_to_tool_file "$output"
+		libobjs=$nm_file_list_spec$func_to_tool_file_result
+		func_append delfiles " $output"
+		func_verbose "creating $NM input file list: $output"
+		for obj in $save_libobjs; do
+		  func_to_tool_file "$obj"
+		  $ECHO "$func_to_tool_file_result"
+		done > "$output"
+		eval cmd=\"$cmd1\"
+		func_show_eval "$cmd" 'exit $?'
+		output=$save_output
+		libobjs=$save_libobjs
+		skipped_export=false
+	      else
+		# The command line is too long to execute in one step.
+		func_verbose "using reloadable object file for export list..."
+		skipped_export=:
+		# Break out early, otherwise skipped_export may be
+		# set to false by a later but shorter cmd.
+		break
+	      fi
+	    done
+	    IFS=$save_ifs
+	    if test -n "$export_symbols_regex" && test : != "$skipped_export"; then
+	      func_show_eval '$EGREP -e "$export_symbols_regex" "$export_symbols" > "${export_symbols}T"'
+	      func_show_eval '$MV "${export_symbols}T" "$export_symbols"'
+	    fi
+	  fi
+	fi
+
+	if test -n "$export_symbols" && test -n "$include_expsyms"; then
+	  tmp_export_symbols=$export_symbols
+	  test -n "$orig_export_symbols" && tmp_export_symbols=$orig_export_symbols
+	  $opt_dry_run || eval '$ECHO "$include_expsyms" | $SP2NL >> "$tmp_export_symbols"'
+	fi
+
+	if test : != "$skipped_export" && test -n "$orig_export_symbols"; then
+	  # The given exports_symbols file has to be filtered, so filter it.
+	  func_verbose "filter symbol list for '$libname.la' to tag DATA exports"
+	  # FIXME: $output_objdir/$libname.filter potentially contains lots of
+	  # 's' commands, which not all seds can handle. GNU sed should be fine
+	  # though. Also, the filter scales superlinearly with the number of
+	  # global variables. join(1) would be nice here, but unfortunately
+	  # isn't a blessed tool.
+	  $opt_dry_run || $SED -e '/[ ,]DATA/!d;s,\(.*\)\([ \,].*\),s|^\1$|\1\2|,' < $export_symbols > $output_objdir/$libname.filter
+	  func_append delfiles " $export_symbols $output_objdir/$libname.filter"
+	  export_symbols=$output_objdir/$libname.def
+	  $opt_dry_run || $SED -f $output_objdir/$libname.filter < $orig_export_symbols > $export_symbols
+	fi
+
+	tmp_deplibs=
+	for test_deplib in $deplibs; do
+	  case " $convenience " in
+	  *" $test_deplib "*) ;;
+	  *)
+	    func_append tmp_deplibs " $test_deplib"
+	    ;;
+	  esac
+	done
+	deplibs=$tmp_deplibs
+
+	if test -n "$convenience"; then
+	  if test -n "$whole_archive_flag_spec" &&
+	    test yes = "$compiler_needs_object" &&
+	    test -z "$libobjs"; then
+	    # extract the archives, so we have objects to list.
+	    # TODO: could optimize this to just extract one archive.
+	    whole_archive_flag_spec=
+	  fi
+	  if test -n "$whole_archive_flag_spec"; then
+	    save_libobjs=$libobjs
+	    eval libobjs=\"\$libobjs $whole_archive_flag_spec\"
+	    test "X$libobjs" = "X " && libobjs=
+	  else
+	    gentop=$output_objdir/${outputname}x
+	    func_append generated " $gentop"
+
+	    func_extract_archives $gentop $convenience
+	    func_append libobjs " $func_extract_archives_result"
+	    test "X$libobjs" = "X " && libobjs=
+	  fi
+	fi
+
+	if test yes = "$thread_safe" && test -n "$thread_safe_flag_spec"; then
+	  eval flag=\"$thread_safe_flag_spec\"
+	  func_append linker_flags " $flag"
+	fi
+
+	# Make a backup of the uninstalled library when relinking
+	if test relink = "$opt_mode"; then
+	  $opt_dry_run || eval '(cd $output_objdir && $RM ${realname}U && $MV $realname ${realname}U)' || exit $?
+	fi
+
+	# Do each of the archive commands.
+	if test yes = "$module" && test -n "$module_cmds"; then
+	  if test -n "$export_symbols" && test -n "$module_expsym_cmds"; then
+	    eval test_cmds=\"$module_expsym_cmds\"
+	    cmds=$module_expsym_cmds
+	  else
+	    eval test_cmds=\"$module_cmds\"
+	    cmds=$module_cmds
+	  fi
+	else
+	  if test -n "$export_symbols" && test -n "$archive_expsym_cmds"; then
+	    eval test_cmds=\"$archive_expsym_cmds\"
+	    cmds=$archive_expsym_cmds
+	  else
+	    eval test_cmds=\"$archive_cmds\"
+	    cmds=$archive_cmds
+	  fi
+	fi
+
+	if test : != "$skipped_export" &&
+	   func_len " $test_cmds" &&
+	   len=$func_len_result &&
+	   test "$len" -lt "$max_cmd_len" || test "$max_cmd_len" -le -1; then
+	  :
+	else
+	  # The command line is too long to link in one step, link piecewise
+	  # or, if using GNU ld and skipped_export is not :, use a linker
+	  # script.
+
+	  # Save the value of $output and $libobjs because we want to
+	  # use them later.  If we have whole_archive_flag_spec, we
+	  # want to use save_libobjs as it was before
+	  # whole_archive_flag_spec was expanded, because we can't
+	  # assume the linker understands whole_archive_flag_spec.
+	  # This may have to be revisited, in case too many
+	  # convenience libraries get linked in and end up exceeding
+	  # the spec.
+	  if test -z "$convenience" || test -z "$whole_archive_flag_spec"; then
+	    save_libobjs=$libobjs
+	  fi
+	  save_output=$output
+	  func_basename "$output"
+	  output_la=$func_basename_result
+
+	  # Clear the reloadable object creation command queue and
+	  # initialize k to one.
+	  test_cmds=
+	  concat_cmds=
+	  objlist=
+	  last_robj=
+	  k=1
+
+	  if test -n "$save_libobjs" && test : != "$skipped_export" && test yes = "$with_gnu_ld"; then
+	    output=$output_objdir/$output_la.lnkscript
+	    func_verbose "creating GNU ld script: $output"
+	    echo 'INPUT (' > $output
+	    for obj in $save_libobjs
+	    do
+	      func_to_tool_file "$obj"
+	      $ECHO "$func_to_tool_file_result" >> $output
+	    done
+	    echo ')' >> $output
+	    func_append delfiles " $output"
+	    func_to_tool_file "$output"
+	    output=$func_to_tool_file_result
+	  elif test -n "$save_libobjs" && test : != "$skipped_export" && test -n "$file_list_spec"; then
+	    output=$output_objdir/$output_la.lnk
+	    func_verbose "creating linker input file list: $output"
+	    : > $output
+	    set x $save_libobjs
+	    shift
+	    firstobj=
+	    if test yes = "$compiler_needs_object"; then
+	      firstobj="$1 "
+	      shift
+	    fi
+	    for obj
+	    do
+	      func_to_tool_file "$obj"
+	      $ECHO "$func_to_tool_file_result" >> $output
+	    done
+	    func_append delfiles " $output"
+	    func_to_tool_file "$output"
+	    output=$firstobj\"$file_list_spec$func_to_tool_file_result\"
+	  else
+	    if test -n "$save_libobjs"; then
+	      func_verbose "creating reloadable object files..."
+	      output=$output_objdir/$output_la-$k.$objext
+	      eval test_cmds=\"$reload_cmds\"
+	      func_len " $test_cmds"
+	      len0=$func_len_result
+	      len=$len0
+
+	      # Loop over the list of objects to be linked.
+	      for obj in $save_libobjs
+	      do
+		func_len " $obj"
+		func_arith $len + $func_len_result
+		len=$func_arith_result
+		if test -z "$objlist" ||
+		   test "$len" -lt "$max_cmd_len"; then
+		  func_append objlist " $obj"
+		else
+		  # The command $test_cmds is almost too long, add a
+		  # command to the queue.
+		  if test 1 -eq "$k"; then
+		    # The first file doesn't have a previous command to add.
+		    reload_objs=$objlist
+		    eval concat_cmds=\"$reload_cmds\"
+		  else
+		    # All subsequent reloadable object files will link in
+		    # the last one created.
+		    reload_objs="$objlist $last_robj"
+		    eval concat_cmds=\"\$concat_cmds~$reload_cmds~\$RM $last_robj\"
+		  fi
+		  last_robj=$output_objdir/$output_la-$k.$objext
+		  func_arith $k + 1
+		  k=$func_arith_result
+		  output=$output_objdir/$output_la-$k.$objext
+		  objlist=" $obj"
+		  func_len " $last_robj"
+		  func_arith $len0 + $func_len_result
+		  len=$func_arith_result
+		fi
+	      done
+	      # Handle the remaining objects by creating one last
+	      # reloadable object file.  All subsequent reloadable object
+	      # files will link in the last one created.
+	      test -z "$concat_cmds" || concat_cmds=$concat_cmds~
+	      reload_objs="$objlist $last_robj"
+	      eval concat_cmds=\"\$concat_cmds$reload_cmds\"
+	      if test -n "$last_robj"; then
+	        eval concat_cmds=\"\$concat_cmds~\$RM $last_robj\"
+	      fi
+	      func_append delfiles " $output"
+
+	    else
+	      output=
+	    fi
+
+	    ${skipped_export-false} && {
+	      func_verbose "generating symbol list for '$libname.la'"
+	      export_symbols=$output_objdir/$libname.exp
+	      $opt_dry_run || $RM $export_symbols
+	      libobjs=$output
+	      # Append the command to create the export file.
+	      test -z "$concat_cmds" || concat_cmds=$concat_cmds~
+	      eval concat_cmds=\"\$concat_cmds$export_symbols_cmds\"
+	      if test -n "$last_robj"; then
+		eval concat_cmds=\"\$concat_cmds~\$RM $last_robj\"
+	      fi
+	    }
+
+	    test -n "$save_libobjs" &&
+	      func_verbose "creating a temporary reloadable object file: $output"
+
+	    # Loop through the commands generated above and execute them.
+	    save_ifs=$IFS; IFS='~'
+	    for cmd in $concat_cmds; do
+	      IFS=$save_ifs
+	      $opt_quiet || {
+		  func_quote_for_expand "$cmd"
+		  eval "func_echo $func_quote_for_expand_result"
+	      }
+	      $opt_dry_run || eval "$cmd" || {
+		lt_exit=$?
+
+		# Restore the uninstalled library and exit
+		if test relink = "$opt_mode"; then
+		  ( cd "$output_objdir" && \
+		    $RM "${realname}T" && \
+		    $MV "${realname}U" "$realname" )
+		fi
+
+		exit $lt_exit
+	      }
+	    done
+	    IFS=$save_ifs
+
+	    if test -n "$export_symbols_regex" && ${skipped_export-false}; then
+	      func_show_eval '$EGREP -e "$export_symbols_regex" "$export_symbols" > "${export_symbols}T"'
+	      func_show_eval '$MV "${export_symbols}T" "$export_symbols"'
+	    fi
+	  fi
+
+          ${skipped_export-false} && {
+	    if test -n "$export_symbols" && test -n "$include_expsyms"; then
+	      tmp_export_symbols=$export_symbols
+	      test -n "$orig_export_symbols" && tmp_export_symbols=$orig_export_symbols
+	      $opt_dry_run || eval '$ECHO "$include_expsyms" | $SP2NL >> "$tmp_export_symbols"'
+	    fi
+
+	    if test -n "$orig_export_symbols"; then
+	      # The given exports_symbols file has to be filtered, so filter it.
+	      func_verbose "filter symbol list for '$libname.la' to tag DATA exports"
+	      # FIXME: $output_objdir/$libname.filter potentially contains lots of
+	      # 's' commands, which not all seds can handle. GNU sed should be fine
+	      # though. Also, the filter scales superlinearly with the number of
+	      # global variables. join(1) would be nice here, but unfortunately
+	      # isn't a blessed tool.
+	      $opt_dry_run || $SED -e '/[ ,]DATA/!d;s,\(.*\)\([ \,].*\),s|^\1$|\1\2|,' < $export_symbols > $output_objdir/$libname.filter
+	      func_append delfiles " $export_symbols $output_objdir/$libname.filter"
+	      export_symbols=$output_objdir/$libname.def
+	      $opt_dry_run || $SED -f $output_objdir/$libname.filter < $orig_export_symbols > $export_symbols
+	    fi
+	  }
+
+	  libobjs=$output
+	  # Restore the value of output.
+	  output=$save_output
+
+	  if test -n "$convenience" && test -n "$whole_archive_flag_spec"; then
+	    eval libobjs=\"\$libobjs $whole_archive_flag_spec\"
+	    test "X$libobjs" = "X " && libobjs=
+	  fi
+	  # Expand the library linking commands again to reset the
+	  # value of $libobjs for piecewise linking.
+
+	  # Do each of the archive commands.
+	  if test yes = "$module" && test -n "$module_cmds"; then
+	    if test -n "$export_symbols" && test -n "$module_expsym_cmds"; then
+	      cmds=$module_expsym_cmds
+	    else
+	      cmds=$module_cmds
+	    fi
+	  else
+	    if test -n "$export_symbols" && test -n "$archive_expsym_cmds"; then
+	      cmds=$archive_expsym_cmds
+	    else
+	      cmds=$archive_cmds
+	    fi
+	  fi
+	fi
+
+	if test -n "$delfiles"; then
+	  # Append the command to remove temporary files to $cmds.
+	  eval cmds=\"\$cmds~\$RM $delfiles\"
+	fi
+
+	# Add any objects from preloaded convenience libraries
+	if test -n "$dlprefiles"; then
+	  gentop=$output_objdir/${outputname}x
+	  func_append generated " $gentop"
+
+	  func_extract_archives $gentop $dlprefiles
+	  func_append libobjs " $func_extract_archives_result"
+	  test "X$libobjs" = "X " && libobjs=
+	fi
+
+	save_ifs=$IFS; IFS='~'
+	for cmd in $cmds; do
+	  IFS=$sp$nl
+	  eval cmd=\"$cmd\"
+	  IFS=$save_ifs
+	  $opt_quiet || {
+	    func_quote_for_expand "$cmd"
+	    eval "func_echo $func_quote_for_expand_result"
+	  }
+	  $opt_dry_run || eval "$cmd" || {
+	    lt_exit=$?
+
+	    # Restore the uninstalled library and exit
+	    if test relink = "$opt_mode"; then
+	      ( cd "$output_objdir" && \
+	        $RM "${realname}T" && \
+		$MV "${realname}U" "$realname" )
+	    fi
+
+	    exit $lt_exit
+	  }
+	done
+	IFS=$save_ifs
+
+	# Restore the uninstalled library and exit
+	if test relink = "$opt_mode"; then
+	  $opt_dry_run || eval '(cd $output_objdir && $RM ${realname}T && $MV $realname ${realname}T && $MV ${realname}U $realname)' || exit $?
+
+	  if test -n "$convenience"; then
+	    if test -z "$whole_archive_flag_spec"; then
+	      func_show_eval '${RM}r "$gentop"'
+	    fi
+	  fi
+
+	  exit $EXIT_SUCCESS
+	fi
+
+	# Create links to the real library.
+	for linkname in $linknames; do
+	  if test "$realname" != "$linkname"; then
+	    func_show_eval '(cd "$output_objdir" && $RM "$linkname" && $LN_S "$realname" "$linkname")' 'exit $?'
+	  fi
+	done
+
+	# If -module or -export-dynamic was specified, set the dlname.
+	if test yes = "$module" || test yes = "$export_dynamic"; then
+	  # On all known operating systems, these are identical.
+	  dlname=$soname
+	fi
+      fi
+      ;;
+
+    obj)
+      if test -n "$dlfiles$dlprefiles" || test no != "$dlself"; then
+	func_warning "'-dlopen' is ignored for objects"
+      fi
+
+      case " $deplibs" in
+      *\ -l* | *\ -L*)
+	func_warning "'-l' and '-L' are ignored for objects" ;;
+      esac
+
+      test -n "$rpath" && \
+	func_warning "'-rpath' is ignored for objects"
+
+      test -n "$xrpath" && \
+	func_warning "'-R' is ignored for objects"
+
+      test -n "$vinfo" && \
+	func_warning "'-version-info' is ignored for objects"
+
+      test -n "$release" && \
+	func_warning "'-release' is ignored for objects"
+
+      case $output in
+      *.lo)
+	test -n "$objs$old_deplibs" && \
+	  func_fatal_error "cannot build library object '$output' from non-libtool objects"
+
+	libobj=$output
+	func_lo2o "$libobj"
+	obj=$func_lo2o_result
+	;;
+      *)
+	libobj=
+	obj=$output
+	;;
+      esac
+
+      # Delete the old objects.
+      $opt_dry_run || $RM $obj $libobj
+
+      # Objects from convenience libraries.  This assumes
+      # single-version convenience libraries.  Whenever we create
+      # different ones for PIC/non-PIC, this we'll have to duplicate
+      # the extraction.
+      reload_conv_objs=
+      gentop=
+      # if reload_cmds runs $LD directly, get rid of -Wl from
+      # whole_archive_flag_spec and hope we can get by with turning comma
+      # into space.
+      case $reload_cmds in
+        *\$LD[\ \$]*) wl= ;;
+      esac
+      if test -n "$convenience"; then
+	if test -n "$whole_archive_flag_spec"; then
+	  eval tmp_whole_archive_flags=\"$whole_archive_flag_spec\"
+	  test -n "$wl" || tmp_whole_archive_flags=`$ECHO "$tmp_whole_archive_flags" | $SED 's|,| |g'`
+	  reload_conv_objs=$reload_objs\ $tmp_whole_archive_flags
+	else
+	  gentop=$output_objdir/${obj}x
+	  func_append generated " $gentop"
+
+	  func_extract_archives $gentop $convenience
+	  reload_conv_objs="$reload_objs $func_extract_archives_result"
+	fi
+      fi
+
+      # If we're not building shared, we need to use non_pic_objs
+      test yes = "$build_libtool_libs" || libobjs=$non_pic_objects
+
+      # Create the old-style object.
+      reload_objs=$objs$old_deplibs' '`$ECHO "$libobjs" | $SP2NL | $SED "/\.$libext$/d; /\.lib$/d; $lo2o" | $NL2SP`' '$reload_conv_objs
+
+      output=$obj
+      func_execute_cmds "$reload_cmds" 'exit $?'
+
+      # Exit if we aren't doing a library object file.
+      if test -z "$libobj"; then
+	if test -n "$gentop"; then
+	  func_show_eval '${RM}r "$gentop"'
+	fi
+
+	exit $EXIT_SUCCESS
+      fi
+
+      test yes = "$build_libtool_libs" || {
+	if test -n "$gentop"; then
+	  func_show_eval '${RM}r "$gentop"'
+	fi
+
+	# Create an invalid libtool object if no PIC, so that we don't
+	# accidentally link it into a program.
+	# $show "echo timestamp > $libobj"
+	# $opt_dry_run || eval "echo timestamp > $libobj" || exit $?
+	exit $EXIT_SUCCESS
+      }
+
+      if test -n "$pic_flag" || test default != "$pic_mode"; then
+	# Only do commands if we really have different PIC objects.
+	reload_objs="$libobjs $reload_conv_objs"
+	output=$libobj
+	func_execute_cmds "$reload_cmds" 'exit $?'
+      fi
+
+      if test -n "$gentop"; then
+	func_show_eval '${RM}r "$gentop"'
+      fi
+
+      exit $EXIT_SUCCESS
+      ;;
+
+    prog)
+      case $host in
+	*cygwin*) func_stripname '' '.exe' "$output"
+	          output=$func_stripname_result.exe;;
+      esac
+      test -n "$vinfo" && \
+	func_warning "'-version-info' is ignored for programs"
+
+      test -n "$release" && \
+	func_warning "'-release' is ignored for programs"
+
+      $preload \
+	&& test unknown,unknown,unknown = "$dlopen_support,$dlopen_self,$dlopen_self_static" \
+	&& func_warning "'LT_INIT([dlopen])' not used. Assuming no dlopen support."
+
+      case $host in
+      *-*-rhapsody* | *-*-darwin1.[012])
+	# On Rhapsody replace the C library is the System framework
+	compile_deplibs=`$ECHO " $compile_deplibs" | $SED 's/ -lc / System.ltframework /'`
+	finalize_deplibs=`$ECHO " $finalize_deplibs" | $SED 's/ -lc / System.ltframework /'`
+	;;
+      esac
+
+      case $host in
+      *-*-darwin*)
+	# Don't allow lazy linking, it breaks C++ global constructors
+	# But is supposedly fixed on 10.4 or later (yay!).
+	if test CXX = "$tagname"; then
+	  case ${MACOSX_DEPLOYMENT_TARGET-10.0} in
+	    10.[0123])
+	      func_append compile_command " $wl-bind_at_load"
+	      func_append finalize_command " $wl-bind_at_load"
+	    ;;
+	  esac
+	fi
+	# Time to change all our "foo.ltframework" stuff back to "-framework foo"
+	compile_deplibs=`$ECHO " $compile_deplibs" | $SED 's% \([^ $]*\).ltframework% -framework \1%g'`
+	finalize_deplibs=`$ECHO " $finalize_deplibs" | $SED 's% \([^ $]*\).ltframework% -framework \1%g'`
+	;;
+      esac
+
+
+      # move library search paths that coincide with paths to not yet
+      # installed libraries to the beginning of the library search list
+      new_libs=
+      for path in $notinst_path; do
+	case " $new_libs " in
+	*" -L$path/$objdir "*) ;;
+	*)
+	  case " $compile_deplibs " in
+	  *" -L$path/$objdir "*)
+	    func_append new_libs " -L$path/$objdir" ;;
+	  esac
+	  ;;
+	esac
+      done
+      for deplib in $compile_deplibs; do
+	case $deplib in
+	-L*)
+	  case " $new_libs " in
+	  *" $deplib "*) ;;
+	  *) func_append new_libs " $deplib" ;;
+	  esac
+	  ;;
+	*) func_append new_libs " $deplib" ;;
+	esac
+      done
+      compile_deplibs=$new_libs
+
+
+      func_append compile_command " $compile_deplibs"
+      func_append finalize_command " $finalize_deplibs"
+
+      if test -n "$rpath$xrpath"; then
+	# If the user specified any rpath flags, then add them.
+	for libdir in $rpath $xrpath; do
+	  # This is the magic to use -rpath.
+	  case "$finalize_rpath " in
+	  *" $libdir "*) ;;
+	  *) func_append finalize_rpath " $libdir" ;;
+	  esac
+	done
+      fi
+
+      # Now hardcode the library paths
+      rpath=
+      hardcode_libdirs=
+      for libdir in $compile_rpath $finalize_rpath; do
+	if test -n "$hardcode_libdir_flag_spec"; then
+	  if test -n "$hardcode_libdir_separator"; then
+	    if test -z "$hardcode_libdirs"; then
+	      hardcode_libdirs=$libdir
+	    else
+	      # Just accumulate the unique libdirs.
+	      case $hardcode_libdir_separator$hardcode_libdirs$hardcode_libdir_separator in
+	      *"$hardcode_libdir_separator$libdir$hardcode_libdir_separator"*)
+		;;
+	      *)
+		func_append hardcode_libdirs "$hardcode_libdir_separator$libdir"
+		;;
+	      esac
+	    fi
+	  else
+	    eval flag=\"$hardcode_libdir_flag_spec\"
+	    func_append rpath " $flag"
+	  fi
+	elif test -n "$runpath_var"; then
+	  case "$perm_rpath " in
+	  *" $libdir "*) ;;
+	  *) func_append perm_rpath " $libdir" ;;
+	  esac
+	fi
+	case $host in
+	*-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-os2* | *-cegcc*)
+	  testbindir=`$ECHO "$libdir" | $SED -e 's*/lib$*/bin*'`
+	  case :$dllsearchpath: in
+	  *":$libdir:"*) ;;
+	  ::) dllsearchpath=$libdir;;
+	  *) func_append dllsearchpath ":$libdir";;
+	  esac
+	  case :$dllsearchpath: in
+	  *":$testbindir:"*) ;;
+	  ::) dllsearchpath=$testbindir;;
+	  *) func_append dllsearchpath ":$testbindir";;
+	  esac
+	  ;;
+	esac
+      done
+      # Substitute the hardcoded libdirs into the rpath.
+      if test -n "$hardcode_libdir_separator" &&
+	 test -n "$hardcode_libdirs"; then
+	libdir=$hardcode_libdirs
+	eval rpath=\" $hardcode_libdir_flag_spec\"
+      fi
+      compile_rpath=$rpath
+
+      rpath=
+      hardcode_libdirs=
+      for libdir in $finalize_rpath; do
+	if test -n "$hardcode_libdir_flag_spec"; then
+	  if test -n "$hardcode_libdir_separator"; then
+	    if test -z "$hardcode_libdirs"; then
+	      hardcode_libdirs=$libdir
+	    else
+	      # Just accumulate the unique libdirs.
+	      case $hardcode_libdir_separator$hardcode_libdirs$hardcode_libdir_separator in
+	      *"$hardcode_libdir_separator$libdir$hardcode_libdir_separator"*)
+		;;
+	      *)
+		func_append hardcode_libdirs "$hardcode_libdir_separator$libdir"
+		;;
+	      esac
+	    fi
+	  else
+	    eval flag=\"$hardcode_libdir_flag_spec\"
+	    func_append rpath " $flag"
+	  fi
+	elif test -n "$runpath_var"; then
+	  case "$finalize_perm_rpath " in
+	  *" $libdir "*) ;;
+	  *) func_append finalize_perm_rpath " $libdir" ;;
+	  esac
+	fi
+      done
+      # Substitute the hardcoded libdirs into the rpath.
+      if test -n "$hardcode_libdir_separator" &&
+	 test -n "$hardcode_libdirs"; then
+	libdir=$hardcode_libdirs
+	eval rpath=\" $hardcode_libdir_flag_spec\"
+      fi
+      finalize_rpath=$rpath
+
+      if test -n "$libobjs" && test yes = "$build_old_libs"; then
+	# Transform all the library objects into standard objects.
+	compile_command=`$ECHO "$compile_command" | $SP2NL | $SED "$lo2o" | $NL2SP`
+	finalize_command=`$ECHO "$finalize_command" | $SP2NL | $SED "$lo2o" | $NL2SP`
+      fi
+
+      func_generate_dlsyms "$outputname" "@PROGRAM@" false
+
+      # template prelinking step
+      if test -n "$prelink_cmds"; then
+	func_execute_cmds "$prelink_cmds" 'exit $?'
+      fi
+
+      wrappers_required=:
+      case $host in
+      *cegcc* | *mingw32ce*)
+        # Disable wrappers for cegcc and mingw32ce hosts, we are cross compiling anyway.
+        wrappers_required=false
+        ;;
+      *cygwin* | *mingw* )
+        test yes = "$build_libtool_libs" || wrappers_required=false
+        ;;
+      *)
+        if test no = "$need_relink" || test yes != "$build_libtool_libs"; then
+          wrappers_required=false
+        fi
+        ;;
+      esac
+      $wrappers_required || {
+	# Replace the output file specification.
+	compile_command=`$ECHO "$compile_command" | $SED 's%@OUTPUT@%'"$output"'%g'`
+	link_command=$compile_command$compile_rpath
+
+	# We have no uninstalled library dependencies, so finalize right now.
+	exit_status=0
+	func_show_eval "$link_command" 'exit_status=$?'
+
+	if test -n "$postlink_cmds"; then
+	  func_to_tool_file "$output"
+	  postlink_cmds=`func_echo_all "$postlink_cmds" | $SED -e 's%@OUTPUT@%'"$output"'%g' -e 's%@TOOL_OUTPUT@%'"$func_to_tool_file_result"'%g'`
+	  func_execute_cmds "$postlink_cmds" 'exit $?'
+	fi
+
+	# Delete the generated files.
+	if test -f "$output_objdir/${outputname}S.$objext"; then
+	  func_show_eval '$RM "$output_objdir/${outputname}S.$objext"'
+	fi
+
+	exit $exit_status
+      }
+
+      if test -n "$compile_shlibpath$finalize_shlibpath"; then
+	compile_command="$shlibpath_var=\"$compile_shlibpath$finalize_shlibpath\$$shlibpath_var\" $compile_command"
+      fi
+      if test -n "$finalize_shlibpath"; then
+	finalize_command="$shlibpath_var=\"$finalize_shlibpath\$$shlibpath_var\" $finalize_command"
+      fi
+
+      compile_var=
+      finalize_var=
+      if test -n "$runpath_var"; then
+	if test -n "$perm_rpath"; then
+	  # We should set the runpath_var.
+	  rpath=
+	  for dir in $perm_rpath; do
+	    func_append rpath "$dir:"
+	  done
+	  compile_var="$runpath_var=\"$rpath\$$runpath_var\" "
+	fi
+	if test -n "$finalize_perm_rpath"; then
+	  # We should set the runpath_var.
+	  rpath=
+	  for dir in $finalize_perm_rpath; do
+	    func_append rpath "$dir:"
+	  done
+	  finalize_var="$runpath_var=\"$rpath\$$runpath_var\" "
+	fi
+      fi
+
+      if test yes = "$no_install"; then
+	# We don't need to create a wrapper script.
+	link_command=$compile_var$compile_command$compile_rpath
+	# Replace the output file specification.
+	link_command=`$ECHO "$link_command" | $SED 's%@OUTPUT@%'"$output"'%g'`
+	# Delete the old output file.
+	$opt_dry_run || $RM $output
+	# Link the executable and exit
+	func_show_eval "$link_command" 'exit $?'
+
+	if test -n "$postlink_cmds"; then
+	  func_to_tool_file "$output"
+	  postlink_cmds=`func_echo_all "$postlink_cmds" | $SED -e 's%@OUTPUT@%'"$output"'%g' -e 's%@TOOL_OUTPUT@%'"$func_to_tool_file_result"'%g'`
+	  func_execute_cmds "$postlink_cmds" 'exit $?'
+	fi
+
+	exit $EXIT_SUCCESS
+      fi
+
+      case $hardcode_action,$fast_install in
+        relink,*)
+	  # Fast installation is not supported
+	  link_command=$compile_var$compile_command$compile_rpath
+	  relink_command=$finalize_var$finalize_command$finalize_rpath
+
+	  func_warning "this platform does not like uninstalled shared libraries"
+	  func_warning "'$output' will be relinked during installation"
+	  ;;
+        *,yes)
+	  link_command=$finalize_var$compile_command$finalize_rpath
+	  relink_command=`$ECHO "$compile_var$compile_command$compile_rpath" | $SED 's%@OUTPUT@%\$progdir/\$file%g'`
+          ;;
+	*,no)
+	  link_command=$compile_var$compile_command$compile_rpath
+	  relink_command=$finalize_var$finalize_command$finalize_rpath
+          ;;
+	*,needless)
+	  link_command=$finalize_var$compile_command$finalize_rpath
+	  relink_command=
+          ;;
+      esac
+
+      # Replace the output file specification.
+      link_command=`$ECHO "$link_command" | $SED 's%@OUTPUT@%'"$output_objdir/$outputname"'%g'`
+
+      # Delete the old output files.
+      $opt_dry_run || $RM $output $output_objdir/$outputname $output_objdir/lt-$outputname
+
+      func_show_eval "$link_command" 'exit $?'
+
+      if test -n "$postlink_cmds"; then
+	func_to_tool_file "$output_objdir/$outputname"
+	postlink_cmds=`func_echo_all "$postlink_cmds" | $SED -e 's%@OUTPUT@%'"$output_objdir/$outputname"'%g' -e 's%@TOOL_OUTPUT@%'"$func_to_tool_file_result"'%g'`
+	func_execute_cmds "$postlink_cmds" 'exit $?'
+      fi
+
+      # Now create the wrapper script.
+      func_verbose "creating $output"
+
+      # Quote the relink command for shipping.
+      if test -n "$relink_command"; then
+	# Preserve any variables that may affect compiler behavior
+	for var in $variables_saved_for_relink; do
+	  if eval test -z \"\${$var+set}\"; then
+	    relink_command="{ test -z \"\${$var+set}\" || $lt_unset $var || { $var=; export $var; }; }; $relink_command"
+	  elif eval var_value=\$$var; test -z "$var_value"; then
+	    relink_command="$var=; export $var; $relink_command"
+	  else
+	    func_quote_for_eval "$var_value"
+	    relink_command="$var=$func_quote_for_eval_result; export $var; $relink_command"
+	  fi
+	done
+	relink_command="(cd `pwd`; $relink_command)"
+	relink_command=`$ECHO "$relink_command" | $SED "$sed_quote_subst"`
+      fi
+
+      # Only actually do things if not in dry run mode.
+      $opt_dry_run || {
+	# win32 will think the script is a binary if it has
+	# a .exe suffix, so we strip it off here.
+	case $output in
+	  *.exe) func_stripname '' '.exe' "$output"
+	         output=$func_stripname_result ;;
+	esac
+	# test for cygwin because mv fails w/o .exe extensions
+	case $host in
+	  *cygwin*)
+	    exeext=.exe
+	    func_stripname '' '.exe' "$outputname"
+	    outputname=$func_stripname_result ;;
+	  *) exeext= ;;
+	esac
+	case $host in
+	  *cygwin* | *mingw* )
+	    func_dirname_and_basename "$output" "" "."
+	    output_name=$func_basename_result
+	    output_path=$func_dirname_result
+	    cwrappersource=$output_path/$objdir/lt-$output_name.c
+	    cwrapper=$output_path/$output_name.exe
+	    $RM $cwrappersource $cwrapper
+	    trap "$RM $cwrappersource $cwrapper; exit $EXIT_FAILURE" 1 2 15
+
+	    func_emit_cwrapperexe_src > $cwrappersource
+
+	    # The wrapper executable is built using the $host compiler,
+	    # because it contains $host paths and files. If cross-
+	    # compiling, it, like the target executable, must be
+	    # executed on the $host or under an emulation environment.
+	    $opt_dry_run || {
+	      $LTCC $LTCFLAGS -o $cwrapper $cwrappersource
+	      $STRIP $cwrapper
+	    }
+
+	    # Now, create the wrapper script for func_source use:
+	    func_ltwrapper_scriptname $cwrapper
+	    $RM $func_ltwrapper_scriptname_result
+	    trap "$RM $func_ltwrapper_scriptname_result; exit $EXIT_FAILURE" 1 2 15
+	    $opt_dry_run || {
+	      # note: this script will not be executed, so do not chmod.
+	      if test "x$build" = "x$host"; then
+		$cwrapper --lt-dump-script > $func_ltwrapper_scriptname_result
+	      else
+		func_emit_wrapper no > $func_ltwrapper_scriptname_result
+	      fi
+	    }
+	  ;;
+	  * )
+	    $RM $output
+	    trap "$RM $output; exit $EXIT_FAILURE" 1 2 15
+
+	    func_emit_wrapper no > $output
+	    chmod +x $output
+	  ;;
+	esac
+      }
+      exit $EXIT_SUCCESS
+      ;;
+    esac
+
+    # See if we need to build an old-fashioned archive.
+    for oldlib in $oldlibs; do
+
+      case $build_libtool_libs in
+        convenience)
+	  oldobjs="$libobjs_save $symfileobj"
+	  addlibs=$convenience
+	  build_libtool_libs=no
+	  ;;
+	module)
+	  oldobjs=$libobjs_save
+	  addlibs=$old_convenience
+	  build_libtool_libs=no
+          ;;
+	*)
+	  oldobjs="$old_deplibs $non_pic_objects"
+	  $preload && test -f "$symfileobj" \
+	    && func_append oldobjs " $symfileobj"
+	  addlibs=$old_convenience
+	  ;;
+      esac
+
+      if test -n "$addlibs"; then
+	gentop=$output_objdir/${outputname}x
+	func_append generated " $gentop"
+
+	func_extract_archives $gentop $addlibs
+	func_append oldobjs " $func_extract_archives_result"
+      fi
+
+      # Do each command in the archive commands.
+      if test -n "$old_archive_from_new_cmds" && test yes = "$build_libtool_libs"; then
+	cmds=$old_archive_from_new_cmds
+      else
+
+	# Add any objects from preloaded convenience libraries
+	if test -n "$dlprefiles"; then
+	  gentop=$output_objdir/${outputname}x
+	  func_append generated " $gentop"
+
+	  func_extract_archives $gentop $dlprefiles
+	  func_append oldobjs " $func_extract_archives_result"
+	fi
+
+	# POSIX demands no paths to be encoded in archives.  We have
+	# to avoid creating archives with duplicate basenames if we
+	# might have to extract them afterwards, e.g., when creating a
+	# static archive out of a convenience library, or when linking
+	# the entirety of a libtool archive into another (currently
+	# not supported by libtool).
+	if (for obj in $oldobjs
+	    do
+	      func_basename "$obj"
+	      $ECHO "$func_basename_result"
+	    done | sort | sort -uc >/dev/null 2>&1); then
+	  :
+	else
+	  echo "copying selected object files to avoid basename conflicts..."
+	  gentop=$output_objdir/${outputname}x
+	  func_append generated " $gentop"
+	  func_mkdir_p "$gentop"
+	  save_oldobjs=$oldobjs
+	  oldobjs=
+	  counter=1
+	  for obj in $save_oldobjs
+	  do
+	    func_basename "$obj"
+	    objbase=$func_basename_result
+	    case " $oldobjs " in
+	    " ") oldobjs=$obj ;;
+	    *[\ /]"$objbase "*)
+	      while :; do
+		# Make sure we don't pick an alternate name that also
+		# overlaps.
+		newobj=lt$counter-$objbase
+		func_arith $counter + 1
+		counter=$func_arith_result
+		case " $oldobjs " in
+		*[\ /]"$newobj "*) ;;
+		*) if test ! -f "$gentop/$newobj"; then break; fi ;;
+		esac
+	      done
+	      func_show_eval "ln $obj $gentop/$newobj || cp $obj $gentop/$newobj"
+	      func_append oldobjs " $gentop/$newobj"
+	      ;;
+	    *) func_append oldobjs " $obj" ;;
+	    esac
+	  done
+	fi
+	func_to_tool_file "$oldlib" func_convert_file_msys_to_w32
+	tool_oldlib=$func_to_tool_file_result
+	eval cmds=\"$old_archive_cmds\"
+
+	func_len " $cmds"
+	len=$func_len_result
+	if test "$len" -lt "$max_cmd_len" || test "$max_cmd_len" -le -1; then
+	  cmds=$old_archive_cmds
+	elif test -n "$archiver_list_spec"; then
+	  func_verbose "using command file archive linking..."
+	  for obj in $oldobjs
+	  do
+	    func_to_tool_file "$obj"
+	    $ECHO "$func_to_tool_file_result"
+	  done > $output_objdir/$libname.libcmd
+	  func_to_tool_file "$output_objdir/$libname.libcmd"
+	  oldobjs=" $archiver_list_spec$func_to_tool_file_result"
+	  cmds=$old_archive_cmds
+	else
+	  # the command line is too long to link in one step, link in parts
+	  func_verbose "using piecewise archive linking..."
+	  save_RANLIB=$RANLIB
+	  RANLIB=:
+	  objlist=
+	  concat_cmds=
+	  save_oldobjs=$oldobjs
+	  oldobjs=
+	  # Is there a better way of finding the last object in the list?
+	  for obj in $save_oldobjs
+	  do
+	    last_oldobj=$obj
+	  done
+	  eval test_cmds=\"$old_archive_cmds\"
+	  func_len " $test_cmds"
+	  len0=$func_len_result
+	  len=$len0
+	  for obj in $save_oldobjs
+	  do
+	    func_len " $obj"
+	    func_arith $len + $func_len_result
+	    len=$func_arith_result
+	    func_append objlist " $obj"
+	    if test "$len" -lt "$max_cmd_len"; then
+	      :
+	    else
+	      # the above command should be used before it gets too long
+	      oldobjs=$objlist
+	      if test "$obj" = "$last_oldobj"; then
+		RANLIB=$save_RANLIB
+	      fi
+	      test -z "$concat_cmds" || concat_cmds=$concat_cmds~
+	      eval concat_cmds=\"\$concat_cmds$old_archive_cmds\"
+	      objlist=
+	      len=$len0
+	    fi
+	  done
+	  RANLIB=$save_RANLIB
+	  oldobjs=$objlist
+	  if test -z "$oldobjs"; then
+	    eval cmds=\"\$concat_cmds\"
+	  else
+	    eval cmds=\"\$concat_cmds~\$old_archive_cmds\"
+	  fi
+	fi
+      fi
+      func_execute_cmds "$cmds" 'exit $?'
+    done
+
+    test -n "$generated" && \
+      func_show_eval "${RM}r$generated"
+
+    # Now create the libtool archive.
+    case $output in
+    *.la)
+      old_library=
+      test yes = "$build_old_libs" && old_library=$libname.$libext
+      func_verbose "creating $output"
+
+      # Preserve any variables that may affect compiler behavior
+      for var in $variables_saved_for_relink; do
+	if eval test -z \"\${$var+set}\"; then
+	  relink_command="{ test -z \"\${$var+set}\" || $lt_unset $var || { $var=; export $var; }; }; $relink_command"
+	elif eval var_value=\$$var; test -z "$var_value"; then
+	  relink_command="$var=; export $var; $relink_command"
+	else
+	  func_quote_for_eval "$var_value"
+	  relink_command="$var=$func_quote_for_eval_result; export $var; $relink_command"
+	fi
+      done
+      # Quote the link command for shipping.
+      relink_command="(cd `pwd`; $SHELL \"$progpath\" $preserve_args --mode=relink $libtool_args @inst_prefix_dir@)"
+      relink_command=`$ECHO "$relink_command" | $SED "$sed_quote_subst"`
+      if test yes = "$hardcode_automatic"; then
+	relink_command=
+      fi
+
+      # Only create the output if not a dry run.
+      $opt_dry_run || {
+	for installed in no yes; do
+	  if test yes = "$installed"; then
+	    if test -z "$install_libdir"; then
+	      break
+	    fi
+	    output=$output_objdir/${outputname}i
+	    # Replace all uninstalled libtool libraries with the installed ones
+	    newdependency_libs=
+	    for deplib in $dependency_libs; do
+	      case $deplib in
+	      *.la)
+		func_basename "$deplib"
+		name=$func_basename_result
+		func_resolve_sysroot "$deplib"
+		eval libdir=`$SED -n -e 's/^libdir=\(.*\)$/\1/p' $func_resolve_sysroot_result`
+		test -z "$libdir" && \
+		  func_fatal_error "'$deplib' is not a valid libtool archive"
+		func_append newdependency_libs " ${lt_sysroot:+=}$libdir/$name"
+		;;
+	      -L*)
+		func_stripname -L '' "$deplib"
+		func_replace_sysroot "$func_stripname_result"
+		func_append newdependency_libs " -L$func_replace_sysroot_result"
+		;;
+	      -R*)
+		func_stripname -R '' "$deplib"
+		func_replace_sysroot "$func_stripname_result"
+		func_append newdependency_libs " -R$func_replace_sysroot_result"
+		;;
+	      *) func_append newdependency_libs " $deplib" ;;
+	      esac
+	    done
+	    dependency_libs=$newdependency_libs
+	    newdlfiles=
+
+	    for lib in $dlfiles; do
+	      case $lib in
+	      *.la)
+	        func_basename "$lib"
+		name=$func_basename_result
+		eval libdir=`$SED -n -e 's/^libdir=\(.*\)$/\1/p' $lib`
+		test -z "$libdir" && \
+		  func_fatal_error "'$lib' is not a valid libtool archive"
+		func_append newdlfiles " ${lt_sysroot:+=}$libdir/$name"
+		;;
+	      *) func_append newdlfiles " $lib" ;;
+	      esac
+	    done
+	    dlfiles=$newdlfiles
+	    newdlprefiles=
+	    for lib in $dlprefiles; do
+	      case $lib in
+	      *.la)
+		# Only pass preopened files to the pseudo-archive (for
+		# eventual linking with the app. that links it) if we
+		# didn't already link the preopened objects directly into
+		# the library:
+		func_basename "$lib"
+		name=$func_basename_result
+		eval libdir=`$SED -n -e 's/^libdir=\(.*\)$/\1/p' $lib`
+		test -z "$libdir" && \
+		  func_fatal_error "'$lib' is not a valid libtool archive"
+		func_append newdlprefiles " ${lt_sysroot:+=}$libdir/$name"
+		;;
+	      esac
+	    done
+	    dlprefiles=$newdlprefiles
+	  else
+	    newdlfiles=
+	    for lib in $dlfiles; do
+	      case $lib in
+		[\\/]* | [A-Za-z]:[\\/]*) abs=$lib ;;
+		*) abs=`pwd`"/$lib" ;;
+	      esac
+	      func_append newdlfiles " $abs"
+	    done
+	    dlfiles=$newdlfiles
+	    newdlprefiles=
+	    for lib in $dlprefiles; do
+	      case $lib in
+		[\\/]* | [A-Za-z]:[\\/]*) abs=$lib ;;
+		*) abs=`pwd`"/$lib" ;;
+	      esac
+	      func_append newdlprefiles " $abs"
+	    done
+	    dlprefiles=$newdlprefiles
+	  fi
+	  $RM $output
+	  # place dlname in correct position for cygwin
+	  # In fact, it would be nice if we could use this code for all target
+	  # systems that can't hard-code library paths into their executables
+	  # and that have no shared library path variable independent of PATH,
+	  # but it turns out we can't easily determine that from inspecting
+	  # libtool variables, so we have to hard-code the OSs to which it
+	  # applies here; at the moment, that means platforms that use the PE
+	  # object format with DLL files.  See the long comment at the top of
+	  # tests/bindir.at for full details.
+	  tdlname=$dlname
+	  case $host,$output,$installed,$module,$dlname in
+	    *cygwin*,*lai,yes,no,*.dll | *mingw*,*lai,yes,no,*.dll | *cegcc*,*lai,yes,no,*.dll)
+	      # If a -bindir argument was supplied, place the dll there.
+	      if test -n "$bindir"; then
+		func_relative_path "$install_libdir" "$bindir"
+		tdlname=$func_relative_path_result/$dlname
+	      else
+		# Otherwise fall back on heuristic.
+		tdlname=../bin/$dlname
+	      fi
+	      ;;
+	  esac
+	  $ECHO > $output "\
+# $outputname - a libtool library file
+# Generated by $PROGRAM (GNU $PACKAGE) $VERSION
+#
+# Please DO NOT delete this file!
+# It is necessary for linking the library.
+
+# The name that we can dlopen(3).
+dlname='$tdlname'
+
+# Names of this library.
+library_names='$library_names'
+
+# The name of the static archive.
+old_library='$old_library'
+
+# Linker flags that cannot go in dependency_libs.
+inherited_linker_flags='$new_inherited_linker_flags'
+
+# Libraries that this one depends upon.
+dependency_libs='$dependency_libs'
+
+# Names of additional weak libraries provided by this library
+weak_library_names='$weak_libs'
+
+# Version information for $libname.
+current=$current
+age=$age
+revision=$revision
+
+# Is this an already installed library?
+installed=$installed
+
+# Should we warn about portability when linking against -modules?
+shouldnotlink=$module
+
+# Files to dlopen/dlpreopen
+dlopen='$dlfiles'
+dlpreopen='$dlprefiles'
+
+# Directory that this library needs to be installed in:
+libdir='$install_libdir'"
+	  if test no,yes = "$installed,$need_relink"; then
+	    $ECHO >> $output "\
+relink_command=\"$relink_command\""
+	  fi
+	done
+      }
+
+      # Do a symbolic link so that the libtool archive can be found in
+      # LD_LIBRARY_PATH before the program is installed.
+      func_show_eval '( cd "$output_objdir" && $RM "$outputname" && $LN_S "../$outputname" "$outputname" )' 'exit $?'
+      ;;
+    esac
+    exit $EXIT_SUCCESS
+}
+
+if test link = "$opt_mode" || test relink = "$opt_mode"; then
+  func_mode_link ${1+"$@"}
+fi
+
+
+# func_mode_uninstall arg...
+func_mode_uninstall ()
+{
+    $debug_cmd
+
+    RM=$nonopt
+    files=
+    rmforce=false
+    exit_status=0
+
+    # This variable tells wrapper scripts just to set variables rather
+    # than running their programs.
+    libtool_install_magic=$magic
+
+    for arg
+    do
+      case $arg in
+      -f) func_append RM " $arg"; rmforce=: ;;
+      -*) func_append RM " $arg" ;;
+      *) func_append files " $arg" ;;
+      esac
+    done
+
+    test -z "$RM" && \
+      func_fatal_help "you must specify an RM program"
+
+    rmdirs=
+
+    for file in $files; do
+      func_dirname "$file" "" "."
+      dir=$func_dirname_result
+      if test . = "$dir"; then
+	odir=$objdir
+      else
+	odir=$dir/$objdir
+      fi
+      func_basename "$file"
+      name=$func_basename_result
+      test uninstall = "$opt_mode" && odir=$dir
+
+      # Remember odir for removal later, being careful to avoid duplicates
+      if test clean = "$opt_mode"; then
+	case " $rmdirs " in
+	  *" $odir "*) ;;
+	  *) func_append rmdirs " $odir" ;;
+	esac
+      fi
+
+      # Don't error if the file doesn't exist and rm -f was used.
+      if { test -L "$file"; } >/dev/null 2>&1 ||
+	 { test -h "$file"; } >/dev/null 2>&1 ||
+	 test -f "$file"; then
+	:
+      elif test -d "$file"; then
+	exit_status=1
+	continue
+      elif $rmforce; then
+	continue
+      fi
+
+      rmfiles=$file
+
+      case $name in
+      *.la)
+	# Possibly a libtool archive, so verify it.
+	if func_lalib_p "$file"; then
+	  func_source $dir/$name
+
+	  # Delete the libtool libraries and symlinks.
+	  for n in $library_names; do
+	    func_append rmfiles " $odir/$n"
+	  done
+	  test -n "$old_library" && func_append rmfiles " $odir/$old_library"
+
+	  case $opt_mode in
+	  clean)
+	    case " $library_names " in
+	    *" $dlname "*) ;;
+	    *) test -n "$dlname" && func_append rmfiles " $odir/$dlname" ;;
+	    esac
+	    test -n "$libdir" && func_append rmfiles " $odir/$name $odir/${name}i"
+	    ;;
+	  uninstall)
+	    if test -n "$library_names"; then
+	      # Do each command in the postuninstall commands.
+	      func_execute_cmds "$postuninstall_cmds" '$rmforce || exit_status=1'
+	    fi
+
+	    if test -n "$old_library"; then
+	      # Do each command in the old_postuninstall commands.
+	      func_execute_cmds "$old_postuninstall_cmds" '$rmforce || exit_status=1'
+	    fi
+	    # FIXME: should reinstall the best remaining shared library.
+	    ;;
+	  esac
+	fi
+	;;
+
+      *.lo)
+	# Possibly a libtool object, so verify it.
+	if func_lalib_p "$file"; then
+
+	  # Read the .lo file
+	  func_source $dir/$name
+
+	  # Add PIC object to the list of files to remove.
+	  if test -n "$pic_object" && test none != "$pic_object"; then
+	    func_append rmfiles " $dir/$pic_object"
+	  fi
+
+	  # Add non-PIC object to the list of files to remove.
+	  if test -n "$non_pic_object" && test none != "$non_pic_object"; then
+	    func_append rmfiles " $dir/$non_pic_object"
+	  fi
+	fi
+	;;
+
+      *)
+	if test clean = "$opt_mode"; then
+	  noexename=$name
+	  case $file in
+	  *.exe)
+	    func_stripname '' '.exe' "$file"
+	    file=$func_stripname_result
+	    func_stripname '' '.exe' "$name"
+	    noexename=$func_stripname_result
+	    # $file with .exe has already been added to rmfiles,
+	    # add $file without .exe
+	    func_append rmfiles " $file"
+	    ;;
+	  esac
+	  # Do a test to see if this is a libtool program.
+	  if func_ltwrapper_p "$file"; then
+	    if func_ltwrapper_executable_p "$file"; then
+	      func_ltwrapper_scriptname "$file"
+	      relink_command=
+	      func_source $func_ltwrapper_scriptname_result
+	      func_append rmfiles " $func_ltwrapper_scriptname_result"
+	    else
+	      relink_command=
+	      func_source $dir/$noexename
+	    fi
+
+	    # note $name still contains .exe if it was in $file originally
+	    # as does the version of $file that was added into $rmfiles
+	    func_append rmfiles " $odir/$name $odir/${name}S.$objext"
+	    if test yes = "$fast_install" && test -n "$relink_command"; then
+	      func_append rmfiles " $odir/lt-$name"
+	    fi
+	    if test "X$noexename" != "X$name"; then
+	      func_append rmfiles " $odir/lt-$noexename.c"
+	    fi
+	  fi
+	fi
+	;;
+      esac
+      func_show_eval "$RM $rmfiles" 'exit_status=1'
+    done
+
+    # Try to remove the $objdir's in the directories where we deleted files
+    for dir in $rmdirs; do
+      if test -d "$dir"; then
+	func_show_eval "rmdir $dir >/dev/null 2>&1"
+      fi
+    done
+
+    exit $exit_status
+}
+
+if test uninstall = "$opt_mode" || test clean = "$opt_mode"; then
+  func_mode_uninstall ${1+"$@"}
+fi
+
+test -z "$opt_mode" && {
+  help=$generic_help
+  func_fatal_help "you must specify a MODE"
+}
+
+test -z "$exec_cmd" && \
+  func_fatal_help "invalid operation mode '$opt_mode'"
+
+if test -n "$exec_cmd"; then
+  eval exec "$exec_cmd"
+  exit $EXIT_FAILURE
+fi
+
+exit $exit_status
+
+
+# The TAGs below are defined such that we never get into a situation
+# where we disable both kinds of libraries.  Given conflicting
+# choices, we go for a static library, that is the most portable,
+# since we can't tell whether shared libraries were disabled because
+# the user asked for that or because the platform doesn't support
+# them.  This is particularly important on AIX, because we don't
+# support having both static and shared libraries enabled at the same
+# time on that platform, so we default to a shared-only configuration.
+# If a disable-shared tag is given, we'll fallback to a static-only
+# configuration.  But we'll never go from static-only to shared-only.
+
+# ### BEGIN LIBTOOL TAG CONFIG: disable-shared
+build_libtool_libs=no
+build_old_libs=yes
+# ### END LIBTOOL TAG CONFIG: disable-shared
+
+# ### BEGIN LIBTOOL TAG CONFIG: disable-static
+build_old_libs=`case $build_libtool_libs in yes) echo no;; *) echo yes;; esac`
+# ### END LIBTOOL TAG CONFIG: disable-static
+
+# Local Variables:
+# mode:shell-script
+# sh-indentation:2
+# End:
diff --git a/src/third_party/unwind/dist/config/missing b/src/third_party/unwind/dist/config/missing
new file mode 100755
index 00000000000..f62bbae306c
--- /dev/null
+++ b/src/third_party/unwind/dist/config/missing
@@ -0,0 +1,215 @@
+#! /bin/sh
+# Common wrapper for a few potentially missing GNU programs.
+
+scriptversion=2013-10-28.13; # UTC
+
+# Copyright (C) 1996-2014 Free Software Foundation, Inc.
+# Originally written by Fran,cois Pinard <pinard@iro.umontreal.ca>, 1996.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+if test $# -eq 0; then
+  echo 1>&2 "Try '$0 --help' for more information"
+  exit 1
+fi
+
+case $1 in
+
+  --is-lightweight)
+    # Used by our autoconf macros to check whether the available missing
+    # script is modern enough.
+    exit 0
+    ;;
+
+  --run)
+    # Back-compat with the calling convention used by older automake.
+    shift
+    ;;
+
+  -h|--h|--he|--hel|--help)
+    echo "\
+$0 [OPTION]... PROGRAM [ARGUMENT]...
+
+Run 'PROGRAM [ARGUMENT]...', returning a proper advice when this fails due
+to PROGRAM being missing or too old.
+
+Options:
+  -h, --help      display this help and exit
+  -v, --version   output version information and exit
+
+Supported PROGRAM values:
+  aclocal   autoconf  autoheader   autom4te  automake  makeinfo
+  bison     yacc      flex         lex       help2man
+
+Version suffixes to PROGRAM as well as the prefixes 'gnu-', 'gnu', and
+'g' are ignored when checking the name.
+
+Send bug reports to <bug-automake@gnu.org>."
+    exit $?
+    ;;
+
+  -v|--v|--ve|--ver|--vers|--versi|--versio|--version)
+    echo "missing $scriptversion (GNU Automake)"
+    exit $?
+    ;;
+
+  -*)
+    echo 1>&2 "$0: unknown '$1' option"
+    echo 1>&2 "Try '$0 --help' for more information"
+    exit 1
+    ;;
+
+esac
+
+# Run the given program, remember its exit status.
+"$@"; st=$?
+
+# If it succeeded, we are done.
+test $st -eq 0 && exit 0
+
+# Also exit now if we it failed (or wasn't found), and '--version' was
+# passed; such an option is passed most likely to detect whether the
+# program is present and works.
+case $2 in --version|--help) exit $st;; esac
+
+# Exit code 63 means version mismatch.  This often happens when the user
+# tries to use an ancient version of a tool on a file that requires a
+# minimum version.
+if test $st -eq 63; then
+  msg="probably too old"
+elif test $st -eq 127; then
+  # Program was missing.
+  msg="missing on your system"
+else
+  # Program was found and executed, but failed.  Give up.
+  exit $st
+fi
+
+perl_URL=http://www.perl.org/
+flex_URL=http://flex.sourceforge.net/
+gnu_software_URL=http://www.gnu.org/software
+
+program_details ()
+{
+  case $1 in
+    aclocal|automake)
+      echo "The '$1' program is part of the GNU Automake package:"
+      echo "<$gnu_software_URL/automake>"
+      echo "It also requires GNU Autoconf, GNU m4 and Perl in order to run:"
+      echo "<$gnu_software_URL/autoconf>"
+      echo "<$gnu_software_URL/m4/>"
+      echo "<$perl_URL>"
+      ;;
+    autoconf|autom4te|autoheader)
+      echo "The '$1' program is part of the GNU Autoconf package:"
+      echo "<$gnu_software_URL/autoconf/>"
+      echo "It also requires GNU m4 and Perl in order to run:"
+      echo "<$gnu_software_URL/m4/>"
+      echo "<$perl_URL>"
+      ;;
+  esac
+}
+
+give_advice ()
+{
+  # Normalize program name to check for.
+  normalized_program=`echo "$1" | sed '
+    s/^gnu-//; t
+    s/^gnu//; t
+    s/^g//; t'`
+
+  printf '%s\n' "'$1' is $msg."
+
+  configure_deps="'configure.ac' or m4 files included by 'configure.ac'"
+  case $normalized_program in
+    autoconf*)
+      echo "You should only need it if you modified 'configure.ac',"
+      echo "or m4 files included by it."
+      program_details 'autoconf'
+      ;;
+    autoheader*)
+      echo "You should only need it if you modified 'acconfig.h' or"
+      echo "$configure_deps."
+      program_details 'autoheader'
+      ;;
+    automake*)
+      echo "You should only need it if you modified 'Makefile.am' or"
+      echo "$configure_deps."
+      program_details 'automake'
+      ;;
+    aclocal*)
+      echo "You should only need it if you modified 'acinclude.m4' or"
+      echo "$configure_deps."
+      program_details 'aclocal'
+      ;;
+   autom4te*)
+      echo "You might have modified some maintainer files that require"
+      echo "the 'autom4te' program to be rebuilt."
+      program_details 'autom4te'
+      ;;
+    bison*|yacc*)
+      echo "You should only need it if you modified a '.y' file."
+      echo "You may want to install the GNU Bison package:"
+      echo "<$gnu_software_URL/bison/>"
+      ;;
+    lex*|flex*)
+      echo "You should only need it if you modified a '.l' file."
+      echo "You may want to install the Fast Lexical Analyzer package:"
+      echo "<$flex_URL>"
+      ;;
+    help2man*)
+      echo "You should only need it if you modified a dependency" \
+           "of a man page."
+      echo "You may want to install the GNU Help2man package:"
+      echo "<$gnu_software_URL/help2man/>"
+    ;;
+    makeinfo*)
+      echo "You should only need it if you modified a '.texi' file, or"
+      echo "any other file indirectly affecting the aspect of the manual."
+      echo "You might want to install the Texinfo package:"
+      echo "<$gnu_software_URL/texinfo/>"
+      echo "The spurious makeinfo call might also be the consequence of"
+      echo "using a buggy 'make' (AIX, DU, IRIX), in which case you might"
+      echo "want to install GNU make:"
+      echo "<$gnu_software_URL/make/>"
+      ;;
+    *)
+      echo "You might have modified some files without having the proper"
+      echo "tools for further handling them.  Check the 'README' file, it"
+      echo "often tells you about the needed prerequisites for installing"
+      echo "this package.  You may also peek at any GNU archive site, in"
+      echo "case some other package contains this missing '$1' program."
+      ;;
+  esac
+}
+
+give_advice "$1" | sed -e '1s/^/WARNING: /' \
+                       -e '2,$s/^/         /' >&2
+
+# Propagate the correct exit status (expected to be 127 for a program
+# not found, 63 for a program that failed due to version mismatch).
+exit $st
+
+# Local variables:
+# eval: (add-hook 'write-file-hooks 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC"
+# time-stamp-end: "; # UTC"
+# End:
diff --git a/src/third_party/unwind/dist/config/test-driver b/src/third_party/unwind/dist/config/test-driver
new file mode 100755
index 00000000000..8e575b017d9
--- /dev/null
+++ b/src/third_party/unwind/dist/config/test-driver
@@ -0,0 +1,148 @@
+#! /bin/sh
+# test-driver - basic testsuite driver script.
+
+scriptversion=2013-07-13.22; # UTC
+
+# Copyright (C) 2011-2014 Free Software Foundation, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+# This file is maintained in Automake, please report
+# bugs to <bug-automake@gnu.org> or send patches to
+# <automake-patches@gnu.org>.
+
+# Make unconditional expansion of undefined variables an error.  This
+# helps a lot in preventing typo-related bugs.
+set -u
+
+usage_error ()
+{
+  echo "$0: $*" >&2
+  print_usage >&2
+  exit 2
+}
+
+print_usage ()
+{
+  cat <<END
+Usage:
+  test-driver --test-name=NAME --log-file=PATH --trs-file=PATH
+              [--expect-failure={yes|no}] [--color-tests={yes|no}]
+              [--enable-hard-errors={yes|no}] [--]
+              TEST-SCRIPT [TEST-SCRIPT-ARGUMENTS]
+The '--test-name', '--log-file' and '--trs-file' options are mandatory.
+END
+}
+
+test_name= # Used for reporting.
+log_file=  # Where to save the output of the test script.
+trs_file=  # Where to save the metadata of the test run.
+expect_failure=no
+color_tests=no
+enable_hard_errors=yes
+while test $# -gt 0; do
+  case $1 in
+  --help) print_usage; exit $?;;
+  --version) echo "test-driver $scriptversion"; exit $?;;
+  --test-name) test_name=$2; shift;;
+  --log-file) log_file=$2; shift;;
+  --trs-file) trs_file=$2; shift;;
+  --color-tests) color_tests=$2; shift;;
+  --expect-failure) expect_failure=$2; shift;;
+  --enable-hard-errors) enable_hard_errors=$2; shift;;
+  --) shift; break;;
+  -*) usage_error "invalid option: '$1'";;
+   *) break;;
+  esac
+  shift
+done
+
+missing_opts=
+test x"$test_name" = x && missing_opts="$missing_opts --test-name"
+test x"$log_file"  = x && missing_opts="$missing_opts --log-file"
+test x"$trs_file"  = x && missing_opts="$missing_opts --trs-file"
+if test x"$missing_opts" != x; then
+  usage_error "the following mandatory options are missing:$missing_opts"
+fi
+
+if test $# -eq 0; then
+  usage_error "missing argument"
+fi
+
+if test $color_tests = yes; then
+  # Keep this in sync with 'lib/am/check.am:$(am__tty_colors)'.
+  red='' # Red.
+  grn='' # Green.
+  lgn='' # Light green.
+  blu='' # Blue.
+  mgn='' # Magenta.
+  std=''     # No color.
+else
+  red= grn= lgn= blu= mgn= std=
+fi
+
+do_exit='rm -f $log_file $trs_file; (exit $st); exit $st'
+trap "st=129; $do_exit" 1
+trap "st=130; $do_exit" 2
+trap "st=141; $do_exit" 13
+trap "st=143; $do_exit" 15
+
+# Test script is run here.
+"$@" >$log_file 2>&1
+estatus=$?
+
+if test $enable_hard_errors = no && test $estatus -eq 99; then
+  tweaked_estatus=1
+else
+  tweaked_estatus=$estatus
+fi
+
+case $tweaked_estatus:$expect_failure in
+  0:yes) col=$red res=XPASS recheck=yes gcopy=yes;;
+  0:*)   col=$grn res=PASS  recheck=no  gcopy=no;;
+  77:*)  col=$blu res=SKIP  recheck=no  gcopy=yes;;
+  99:*)  col=$mgn res=ERROR recheck=yes gcopy=yes;;
+  *:yes) col=$lgn res=XFAIL recheck=no  gcopy=yes;;
+  *:*)   col=$red res=FAIL  recheck=yes gcopy=yes;;
+esac
+
+# Report the test outcome and exit status in the logs, so that one can
+# know whether the test passed or failed simply by looking at the '.log'
+# file, without the need of also peaking into the corresponding '.trs'
+# file (automake bug#11814).
+echo "$res $test_name (exit status: $estatus)" >>$log_file
+
+# Report outcome to console.
+echo "${col}${res}${std}: $test_name"
+
+# Register the test result, and other relevant metadata.
+echo ":test-result: $res" > $trs_file
+echo ":global-test-result: $res" >> $trs_file
+echo ":recheck: $recheck" >> $trs_file
+echo ":copy-in-global-log: $gcopy" >> $trs_file
+
+# Local Variables:
+# mode: shell-script
+# sh-indentation: 2
+# eval: (add-hook 'write-file-hooks 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC"
+# time-stamp-end: "; # UTC"
+# End:
diff --git a/src/third_party/unwind/dist/configure b/src/third_party/unwind/dist/configure
new file mode 100755
index 00000000000..c6e8b27031b
--- /dev/null
+++ b/src/third_party/unwind/dist/configure
@@ -0,0 +1,21114 @@
+#! /bin/sh
+# Guess values for system-dependent variables and create Makefiles.
+# Generated by GNU Autoconf 2.69 for libunwind 1.4-rc1.
+#
+# Report bugs to <libunwind-devel@nongnu.org>.
+#
+#
+# Copyright (C) 1992-1996, 1998-2012 Free Software Foundation, Inc.
+#
+#
+# This configure script is free software; the Free Software Foundation
+# gives unlimited permission to copy, distribute and modify it.
+## -------------------- ##
+## M4sh Initialization. ##
+## -------------------- ##
+
+# Be more Bourne compatible
+DUALCASE=1; export DUALCASE # for MKS sh
+if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then :
+  emulate sh
+  NULLCMD=:
+  # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which
+  # is contrary to our usage.  Disable this feature.
+  alias -g '${1+"$@"}'='"$@"'
+  setopt NO_GLOB_SUBST
+else
+  case `(set -o) 2>/dev/null` in #(
+  *posix*) :
+    set -o posix ;; #(
+  *) :
+     ;;
+esac
+fi
+
+
+as_nl='
+'
+export as_nl
+# Printing a long string crashes Solaris 7 /usr/bin/printf.
+as_echo='\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'
+as_echo=$as_echo$as_echo$as_echo$as_echo$as_echo
+as_echo=$as_echo$as_echo$as_echo$as_echo$as_echo$as_echo
+# Prefer a ksh shell builtin over an external printf program on Solaris,
+# but without wasting forks for bash or zsh.
+if test -z "$BASH_VERSION$ZSH_VERSION" \
+    && (test "X`print -r -- $as_echo`" = "X$as_echo") 2>/dev/null; then
+  as_echo='print -r --'
+  as_echo_n='print -rn --'
+elif (test "X`printf %s $as_echo`" = "X$as_echo") 2>/dev/null; then
+  as_echo='printf %s\n'
+  as_echo_n='printf %s'
+else
+  if test "X`(/usr/ucb/echo -n -n $as_echo) 2>/dev/null`" = "X-n $as_echo"; then
+    as_echo_body='eval /usr/ucb/echo -n "$1$as_nl"'
+    as_echo_n='/usr/ucb/echo -n'
+  else
+    as_echo_body='eval expr "X$1" : "X\\(.*\\)"'
+    as_echo_n_body='eval
+      arg=$1;
+      case $arg in #(
+      *"$as_nl"*)
+	expr "X$arg" : "X\\(.*\\)$as_nl";
+	arg=`expr "X$arg" : ".*$as_nl\\(.*\\)"`;;
+      esac;
+      expr "X$arg" : "X\\(.*\\)" | tr -d "$as_nl"
+    '
+    export as_echo_n_body
+    as_echo_n='sh -c $as_echo_n_body as_echo'
+  fi
+  export as_echo_body
+  as_echo='sh -c $as_echo_body as_echo'
+fi
+
+# The user is always right.
+if test "${PATH_SEPARATOR+set}" != set; then
+  PATH_SEPARATOR=:
+  (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 && {
+    (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 ||
+      PATH_SEPARATOR=';'
+  }
+fi
+
+
+# IFS
+# We need space, tab and new line, in precisely that order.  Quoting is
+# there to prevent editors from complaining about space-tab.
+# (If _AS_PATH_WALK were called with IFS unset, it would disable word
+# splitting by setting IFS to empty value.)
+IFS=" ""	$as_nl"
+
+# Find who we are.  Look in the path if we contain no directory separator.
+as_myself=
+case $0 in #((
+  *[\\/]* ) as_myself=$0 ;;
+  *) as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    test -r "$as_dir/$0" && as_myself=$as_dir/$0 && break
+  done
+IFS=$as_save_IFS
+
+     ;;
+esac
+# We did not find ourselves, most probably we were run as `sh COMMAND'
+# in which case we are not to be found in the path.
+if test "x$as_myself" = x; then
+  as_myself=$0
+fi
+if test ! -f "$as_myself"; then
+  $as_echo "$as_myself: error: cannot find myself; rerun with an absolute file name" >&2
+  exit 1
+fi
+
+# Unset variables that we do not need and which cause bugs (e.g. in
+# pre-3.0 UWIN ksh).  But do not cause bugs in bash 2.01; the "|| exit 1"
+# suppresses any "Segmentation fault" message there.  '((' could
+# trigger a bug in pdksh 5.2.14.
+for as_var in BASH_ENV ENV MAIL MAILPATH
+do eval test x\${$as_var+set} = xset \
+  && ( (unset $as_var) || exit 1) >/dev/null 2>&1 && unset $as_var || :
+done
+PS1='$ '
+PS2='> '
+PS4='+ '
+
+# NLS nuisances.
+LC_ALL=C
+export LC_ALL
+LANGUAGE=C
+export LANGUAGE
+
+# CDPATH.
+(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
+
+# Use a proper internal environment variable to ensure we don't fall
+  # into an infinite loop, continuously re-executing ourselves.
+  if test x"${_as_can_reexec}" != xno && test "x$CONFIG_SHELL" != x; then
+    _as_can_reexec=no; export _as_can_reexec;
+    # We cannot yet assume a decent shell, so we have to provide a
+# neutralization value for shells without unset; and this also
+# works around shells that cannot unset nonexistent variables.
+# Preserve -v and -x to the replacement shell.
+BASH_ENV=/dev/null
+ENV=/dev/null
+(unset BASH_ENV) >/dev/null 2>&1 && unset BASH_ENV ENV
+case $- in # ((((
+  *v*x* | *x*v* ) as_opts=-vx ;;
+  *v* ) as_opts=-v ;;
+  *x* ) as_opts=-x ;;
+  * ) as_opts= ;;
+esac
+exec $CONFIG_SHELL $as_opts "$as_myself" ${1+"$@"}
+# Admittedly, this is quite paranoid, since all the known shells bail
+# out after a failed `exec'.
+$as_echo "$0: could not re-execute with $CONFIG_SHELL" >&2
+as_fn_exit 255
+  fi
+  # We don't want this to propagate to other subprocesses.
+          { _as_can_reexec=; unset _as_can_reexec;}
+if test "x$CONFIG_SHELL" = x; then
+  as_bourne_compatible="if test -n \"\${ZSH_VERSION+set}\" && (emulate sh) >/dev/null 2>&1; then :
+  emulate sh
+  NULLCMD=:
+  # Pre-4.2 versions of Zsh do word splitting on \${1+\"\$@\"}, which
+  # is contrary to our usage.  Disable this feature.
+  alias -g '\${1+\"\$@\"}'='\"\$@\"'
+  setopt NO_GLOB_SUBST
+else
+  case \`(set -o) 2>/dev/null\` in #(
+  *posix*) :
+    set -o posix ;; #(
+  *) :
+     ;;
+esac
+fi
+"
+  as_required="as_fn_return () { (exit \$1); }
+as_fn_success () { as_fn_return 0; }
+as_fn_failure () { as_fn_return 1; }
+as_fn_ret_success () { return 0; }
+as_fn_ret_failure () { return 1; }
+
+exitcode=0
+as_fn_success || { exitcode=1; echo as_fn_success failed.; }
+as_fn_failure && { exitcode=1; echo as_fn_failure succeeded.; }
+as_fn_ret_success || { exitcode=1; echo as_fn_ret_success failed.; }
+as_fn_ret_failure && { exitcode=1; echo as_fn_ret_failure succeeded.; }
+if ( set x; as_fn_ret_success y && test x = \"\$1\" ); then :
+
+else
+  exitcode=1; echo positional parameters were not saved.
+fi
+test x\$exitcode = x0 || exit 1
+test -x / || exit 1"
+  as_suggested="  as_lineno_1=";as_suggested=$as_suggested$LINENO;as_suggested=$as_suggested" as_lineno_1a=\$LINENO
+  as_lineno_2=";as_suggested=$as_suggested$LINENO;as_suggested=$as_suggested" as_lineno_2a=\$LINENO
+  eval 'test \"x\$as_lineno_1'\$as_run'\" != \"x\$as_lineno_2'\$as_run'\" &&
+  test \"x\`expr \$as_lineno_1'\$as_run' + 1\`\" = \"x\$as_lineno_2'\$as_run'\"' || exit 1
+
+  test -n \"\${ZSH_VERSION+set}\${BASH_VERSION+set}\" || (
+    ECHO='\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'
+    ECHO=\$ECHO\$ECHO\$ECHO\$ECHO\$ECHO
+    ECHO=\$ECHO\$ECHO\$ECHO\$ECHO\$ECHO\$ECHO
+    PATH=/empty FPATH=/empty; export PATH FPATH
+    test \"X\`printf %s \$ECHO\`\" = \"X\$ECHO\" \\
+      || test \"X\`print -r -- \$ECHO\`\" = \"X\$ECHO\" ) || exit 1
+test \$(( 1 + 1 )) = 2 || exit 1"
+  if (eval "$as_required") 2>/dev/null; then :
+  as_have_required=yes
+else
+  as_have_required=no
+fi
+  if test x$as_have_required = xyes && (eval "$as_suggested") 2>/dev/null; then :
+
+else
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+as_found=false
+for as_dir in /bin$PATH_SEPARATOR/usr/bin$PATH_SEPARATOR$PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  as_found=:
+  case $as_dir in #(
+	 /*)
+	   for as_base in sh bash ksh sh5; do
+	     # Try only shells that exist, to save several forks.
+	     as_shell=$as_dir/$as_base
+	     if { test -f "$as_shell" || test -f "$as_shell.exe"; } &&
+		    { $as_echo "$as_bourne_compatible""$as_required" | as_run=a "$as_shell"; } 2>/dev/null; then :
+  CONFIG_SHELL=$as_shell as_have_required=yes
+		   if { $as_echo "$as_bourne_compatible""$as_suggested" | as_run=a "$as_shell"; } 2>/dev/null; then :
+  break 2
+fi
+fi
+	   done;;
+       esac
+  as_found=false
+done
+$as_found || { if { test -f "$SHELL" || test -f "$SHELL.exe"; } &&
+	      { $as_echo "$as_bourne_compatible""$as_required" | as_run=a "$SHELL"; } 2>/dev/null; then :
+  CONFIG_SHELL=$SHELL as_have_required=yes
+fi; }
+IFS=$as_save_IFS
+
+
+      if test "x$CONFIG_SHELL" != x; then :
+  export CONFIG_SHELL
+             # We cannot yet assume a decent shell, so we have to provide a
+# neutralization value for shells without unset; and this also
+# works around shells that cannot unset nonexistent variables.
+# Preserve -v and -x to the replacement shell.
+BASH_ENV=/dev/null
+ENV=/dev/null
+(unset BASH_ENV) >/dev/null 2>&1 && unset BASH_ENV ENV
+case $- in # ((((
+  *v*x* | *x*v* ) as_opts=-vx ;;
+  *v* ) as_opts=-v ;;
+  *x* ) as_opts=-x ;;
+  * ) as_opts= ;;
+esac
+exec $CONFIG_SHELL $as_opts "$as_myself" ${1+"$@"}
+# Admittedly, this is quite paranoid, since all the known shells bail
+# out after a failed `exec'.
+$as_echo "$0: could not re-execute with $CONFIG_SHELL" >&2
+exit 255
+fi
+
+    if test x$as_have_required = xno; then :
+  $as_echo "$0: This script requires a shell more modern than all"
+  $as_echo "$0: the shells that I found on your system."
+  if test x${ZSH_VERSION+set} = xset ; then
+    $as_echo "$0: In particular, zsh $ZSH_VERSION has bugs and should"
+    $as_echo "$0: be upgraded to zsh 4.3.4 or later."
+  else
+    $as_echo "$0: Please tell bug-autoconf@gnu.org and libunwind-devel@nongnu.org
+$0: about your system, including any error possibly output
+$0: before this message. Then install a modern shell, or
+$0: manually run the script under such a shell if you do
+$0: have one."
+  fi
+  exit 1
+fi
+fi
+fi
+SHELL=${CONFIG_SHELL-/bin/sh}
+export SHELL
+# Unset more variables known to interfere with behavior of common tools.
+CLICOLOR_FORCE= GREP_OPTIONS=
+unset CLICOLOR_FORCE GREP_OPTIONS
+
+## --------------------- ##
+## M4sh Shell Functions. ##
+## --------------------- ##
+# as_fn_unset VAR
+# ---------------
+# Portably unset VAR.
+as_fn_unset ()
+{
+  { eval $1=; unset $1;}
+}
+as_unset=as_fn_unset
+
+# as_fn_set_status STATUS
+# -----------------------
+# Set $? to STATUS, without forking.
+as_fn_set_status ()
+{
+  return $1
+} # as_fn_set_status
+
+# as_fn_exit STATUS
+# -----------------
+# Exit the shell with STATUS, even in a "trap 0" or "set -e" context.
+as_fn_exit ()
+{
+  set +e
+  as_fn_set_status $1
+  exit $1
+} # as_fn_exit
+
+# as_fn_mkdir_p
+# -------------
+# Create "$as_dir" as a directory, including parents if necessary.
+as_fn_mkdir_p ()
+{
+
+  case $as_dir in #(
+  -*) as_dir=./$as_dir;;
+  esac
+  test -d "$as_dir" || eval $as_mkdir_p || {
+    as_dirs=
+    while :; do
+      case $as_dir in #(
+      *\'*) as_qdir=`$as_echo "$as_dir" | sed "s/'/'\\\\\\\\''/g"`;; #'(
+      *) as_qdir=$as_dir;;
+      esac
+      as_dirs="'$as_qdir' $as_dirs"
+      as_dir=`$as_dirname -- "$as_dir" ||
+$as_expr X"$as_dir" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	 X"$as_dir" : 'X\(//\)[^/]' \| \
+	 X"$as_dir" : 'X\(//\)$' \| \
+	 X"$as_dir" : 'X\(/\)' \| . 2>/dev/null ||
+$as_echo X"$as_dir" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)[^/].*/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+      test -d "$as_dir" && break
+    done
+    test -z "$as_dirs" || eval "mkdir $as_dirs"
+  } || test -d "$as_dir" || as_fn_error $? "cannot create directory $as_dir"
+
+
+} # as_fn_mkdir_p
+
+# as_fn_executable_p FILE
+# -----------------------
+# Test if FILE is an executable regular file.
+as_fn_executable_p ()
+{
+  test -f "$1" && test -x "$1"
+} # as_fn_executable_p
+# as_fn_append VAR VALUE
+# ----------------------
+# Append the text in VALUE to the end of the definition contained in VAR. Take
+# advantage of any shell optimizations that allow amortized linear growth over
+# repeated appends, instead of the typical quadratic growth present in naive
+# implementations.
+if (eval "as_var=1; as_var+=2; test x\$as_var = x12") 2>/dev/null; then :
+  eval 'as_fn_append ()
+  {
+    eval $1+=\$2
+  }'
+else
+  as_fn_append ()
+  {
+    eval $1=\$$1\$2
+  }
+fi # as_fn_append
+
+# as_fn_arith ARG...
+# ------------------
+# Perform arithmetic evaluation on the ARGs, and store the result in the
+# global $as_val. Take advantage of shells that can avoid forks. The arguments
+# must be portable across $(()) and expr.
+if (eval "test \$(( 1 + 1 )) = 2") 2>/dev/null; then :
+  eval 'as_fn_arith ()
+  {
+    as_val=$(( $* ))
+  }'
+else
+  as_fn_arith ()
+  {
+    as_val=`expr "$@" || test $? -eq 1`
+  }
+fi # as_fn_arith
+
+
+# as_fn_error STATUS ERROR [LINENO LOG_FD]
+# ----------------------------------------
+# Output "`basename $0`: error: ERROR" to stderr. If LINENO and LOG_FD are
+# provided, also output the error to LOG_FD, referencing LINENO. Then exit the
+# script with STATUS, using 1 if that was 0.
+as_fn_error ()
+{
+  as_status=$1; test $as_status -eq 0 && as_status=1
+  if test "$4"; then
+    as_lineno=${as_lineno-"$3"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+    $as_echo "$as_me:${as_lineno-$LINENO}: error: $2" >&$4
+  fi
+  $as_echo "$as_me: error: $2" >&2
+  as_fn_exit $as_status
+} # as_fn_error
+
+if expr a : '\(a\)' >/dev/null 2>&1 &&
+   test "X`expr 00001 : '.*\(...\)'`" = X001; then
+  as_expr=expr
+else
+  as_expr=false
+fi
+
+if (basename -- /) >/dev/null 2>&1 && test "X`basename -- / 2>&1`" = "X/"; then
+  as_basename=basename
+else
+  as_basename=false
+fi
+
+if (as_dir=`dirname -- /` && test "X$as_dir" = X/) >/dev/null 2>&1; then
+  as_dirname=dirname
+else
+  as_dirname=false
+fi
+
+as_me=`$as_basename -- "$0" ||
+$as_expr X/"$0" : '.*/\([^/][^/]*\)/*$' \| \
+	 X"$0" : 'X\(//\)$' \| \
+	 X"$0" : 'X\(/\)' \| . 2>/dev/null ||
+$as_echo X/"$0" |
+    sed '/^.*\/\([^/][^/]*\)\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\/\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\/\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+
+# Avoid depending upon Character Ranges.
+as_cr_letters='abcdefghijklmnopqrstuvwxyz'
+as_cr_LETTERS='ABCDEFGHIJKLMNOPQRSTUVWXYZ'
+as_cr_Letters=$as_cr_letters$as_cr_LETTERS
+as_cr_digits='0123456789'
+as_cr_alnum=$as_cr_Letters$as_cr_digits
+
+
+  as_lineno_1=$LINENO as_lineno_1a=$LINENO
+  as_lineno_2=$LINENO as_lineno_2a=$LINENO
+  eval 'test "x$as_lineno_1'$as_run'" != "x$as_lineno_2'$as_run'" &&
+  test "x`expr $as_lineno_1'$as_run' + 1`" = "x$as_lineno_2'$as_run'"' || {
+  # Blame Lee E. McMahon (1931-1989) for sed's syntax.  :-)
+  sed -n '
+    p
+    /[$]LINENO/=
+  ' <$as_myself |
+    sed '
+      s/[$]LINENO.*/&-/
+      t lineno
+      b
+      :lineno
+      N
+      :loop
+      s/[$]LINENO\([^'$as_cr_alnum'_].*\n\)\(.*\)/\2\1\2/
+      t loop
+      s/-\n.*//
+    ' >$as_me.lineno &&
+  chmod +x "$as_me.lineno" ||
+    { $as_echo "$as_me: error: cannot create $as_me.lineno; rerun with a POSIX shell" >&2; as_fn_exit 1; }
+
+  # If we had to re-execute with $CONFIG_SHELL, we're ensured to have
+  # already done that, so ensure we don't try to do so again and fall
+  # in an infinite loop.  This has already happened in practice.
+  _as_can_reexec=no; export _as_can_reexec
+  # Don't try to exec as it changes $[0], causing all sort of problems
+  # (the dirname of $[0] is not the place where we might find the
+  # original and so on.  Autoconf is especially sensitive to this).
+  . "./$as_me.lineno"
+  # Exit status is that of the last command.
+  exit
+}
+
+ECHO_C= ECHO_N= ECHO_T=
+case `echo -n x` in #(((((
+-n*)
+  case `echo 'xy\c'` in
+  *c*) ECHO_T='	';;	# ECHO_T is single tab character.
+  xy)  ECHO_C='\c';;
+  *)   echo `echo ksh88 bug on AIX 6.1` > /dev/null
+       ECHO_T='	';;
+  esac;;
+*)
+  ECHO_N='-n';;
+esac
+
+rm -f conf$$ conf$$.exe conf$$.file
+if test -d conf$$.dir; then
+  rm -f conf$$.dir/conf$$.file
+else
+  rm -f conf$$.dir
+  mkdir conf$$.dir 2>/dev/null
+fi
+if (echo >conf$$.file) 2>/dev/null; then
+  if ln -s conf$$.file conf$$ 2>/dev/null; then
+    as_ln_s='ln -s'
+    # ... but there are two gotchas:
+    # 1) On MSYS, both `ln -s file dir' and `ln file dir' fail.
+    # 2) DJGPP < 2.04 has no symlinks; `ln -s' creates a wrapper executable.
+    # In both cases, we have to default to `cp -pR'.
+    ln -s conf$$.file conf$$.dir 2>/dev/null && test ! -f conf$$.exe ||
+      as_ln_s='cp -pR'
+  elif ln conf$$.file conf$$ 2>/dev/null; then
+    as_ln_s=ln
+  else
+    as_ln_s='cp -pR'
+  fi
+else
+  as_ln_s='cp -pR'
+fi
+rm -f conf$$ conf$$.exe conf$$.dir/conf$$.file conf$$.file
+rmdir conf$$.dir 2>/dev/null
+
+if mkdir -p . 2>/dev/null; then
+  as_mkdir_p='mkdir -p "$as_dir"'
+else
+  test -d ./-p && rmdir ./-p
+  as_mkdir_p=false
+fi
+
+as_test_x='test -x'
+as_executable_p=as_fn_executable_p
+
+# Sed expression to map a string onto a valid CPP name.
+as_tr_cpp="eval sed 'y%*$as_cr_letters%P$as_cr_LETTERS%;s%[^_$as_cr_alnum]%_%g'"
+
+# Sed expression to map a string onto a valid variable name.
+as_tr_sh="eval sed 'y%*+%pp%;s%[^_$as_cr_alnum]%_%g'"
+
+SHELL=${CONFIG_SHELL-/bin/sh}
+
+
+test -n "$DJDIR" || exec 7<&0 </dev/null
+exec 6>&1
+
+# Name of the host.
+# hostname on some systems (SVR3.2, old GNU/Linux) returns a bogus exit status,
+# so uname gets run too.
+ac_hostname=`(hostname || uname -n) 2>/dev/null | sed 1q`
+
+#
+# Initializations.
+#
+ac_default_prefix=/usr/local
+ac_clean_files=
+ac_config_libobj_dir=.
+LIBOBJS=
+cross_compiling=no
+subdirs=
+MFLAGS=
+MAKEFLAGS=
+
+# Identity of this package.
+PACKAGE_NAME='libunwind'
+PACKAGE_TARNAME='libunwind'
+PACKAGE_VERSION='1.4-rc1'
+PACKAGE_STRING='libunwind 1.4-rc1'
+PACKAGE_BUGREPORT='libunwind-devel@nongnu.org'
+PACKAGE_URL=''
+
+ac_unique_file="src/mi/backtrace.c"
+# Factoring default headers for most tests.
+ac_includes_default="\
+#include <stdio.h>
+#ifdef HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_STAT_H
+# include <sys/stat.h>
+#endif
+#ifdef STDC_HEADERS
+# include <stdlib.h>
+# include <stddef.h>
+#else
+# ifdef HAVE_STDLIB_H
+#  include <stdlib.h>
+# endif
+#endif
+#ifdef HAVE_STRING_H
+# if !defined STDC_HEADERS && defined HAVE_MEMORY_H
+#  include <memory.h>
+# endif
+# include <string.h>
+#endif
+#ifdef HAVE_STRINGS_H
+# include <strings.h>
+#endif
+#ifdef HAVE_INTTYPES_H
+# include <inttypes.h>
+#endif
+#ifdef HAVE_STDINT_H
+# include <stdint.h>
+#endif
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif"
+
+ac_subst_vars='am__EXEEXT_FALSE
+am__EXEEXT_TRUE
+LTLIBOBJS
+LIBOBJS
+CONFIG_TESTS_FALSE
+CONFIG_TESTS_TRUE
+CONFIG_DOCS_FALSE
+CONFIG_DOCS_TRUE
+LATEX2MAN
+BACKTRACELIB
+DLLIB
+enable_debug_frame
+enable_cxx_exceptions
+PKG_MAINTAINER
+PKG_EXTRA
+PKG_MINOR
+PKG_MAJOR
+LIBCRTS
+LDFLAGS_NOSTARTFILES
+LDFLAGS_STATIC_LIBCXA
+ARCH
+arch
+build_arch
+HAVE_LZMA_FALSE
+HAVE_LZMA_TRUE
+LIBLZMA
+SUPPORT_CXX_EXCEPTIONS_FALSE
+SUPPORT_CXX_EXCEPTIONS_TRUE
+USE_DWARF_FALSE
+USE_DWARF_TRUE
+USE_ELFXX_FALSE
+USE_ELFXX_TRUE
+USE_ELF64_FALSE
+USE_ELF64_TRUE
+USE_ELF32_FALSE
+USE_ELF32_TRUE
+OS_QNX_FALSE
+OS_QNX_TRUE
+OS_FREEBSD_FALSE
+OS_FREEBSD_TRUE
+OS_HPUX_FALSE
+OS_HPUX_TRUE
+OS_LINUX_FALSE
+OS_LINUX_TRUE
+ARCH_S390X_FALSE
+ARCH_S390X_TRUE
+ARCH_TILEGX_FALSE
+ARCH_TILEGX_TRUE
+ARCH_SH_FALSE
+ARCH_SH_TRUE
+ARCH_PPC64_FALSE
+ARCH_PPC64_TRUE
+ARCH_PPC32_FALSE
+ARCH_PPC32_TRUE
+ARCH_X86_64_FALSE
+ARCH_X86_64_TRUE
+ARCH_X86_FALSE
+ARCH_X86_TRUE
+ARCH_MIPS_FALSE
+ARCH_MIPS_TRUE
+ARCH_HPPA_FALSE
+ARCH_HPPA_TRUE
+ARCH_IA64_FALSE
+ARCH_IA64_TRUE
+ARCH_ARM_FALSE
+ARCH_ARM_TRUE
+ARCH_AARCH64_FALSE
+ARCH_AARCH64_TRUE
+REMOTE_ONLY_FALSE
+REMOTE_ONLY_TRUE
+NO_PTRACE_TEST_FALSE
+NO_PTRACE_TEST_TRUE
+BUILD_SETJMP_FALSE
+BUILD_SETJMP_TRUE
+BUILD_PTRACE_FALSE
+BUILD_PTRACE_TRUE
+BUILD_COREDUMP_FALSE
+BUILD_COREDUMP_TRUE
+USE_ALTIVEC_FALSE
+USE_ALTIVEC_TRUE
+am__fastdepCCAS_FALSE
+am__fastdepCCAS_TRUE
+CCASDEPMODE
+CCASFLAGS
+CCAS
+CXXCPP
+CPP
+LT_SYS_LIBRARY_PATH
+OTOOL64
+OTOOL
+LIPO
+NMEDIT
+DSYMUTIL
+MANIFEST_TOOL
+RANLIB
+DLLTOOL
+OBJDUMP
+LN_S
+NM
+ac_ct_DUMPBIN
+DUMPBIN
+LD
+FGREP
+EGREP
+GREP
+SED
+LIBTOOL
+ac_ct_AR
+AR
+am__fastdepCXX_FALSE
+am__fastdepCXX_TRUE
+CXXDEPMODE
+ac_ct_CXX
+CXXFLAGS
+CXX
+am__fastdepCC_FALSE
+am__fastdepCC_TRUE
+CCDEPMODE
+am__nodep
+AMDEPBACKSLASH
+AMDEP_FALSE
+AMDEP_TRUE
+am__quote
+am__include
+DEPDIR
+OBJEXT
+EXEEXT
+ac_ct_CC
+CPPFLAGS
+LDFLAGS
+CFLAGS
+CC
+MAINT
+MAINTAINER_MODE_FALSE
+MAINTAINER_MODE_TRUE
+AM_BACKSLASH
+AM_DEFAULT_VERBOSITY
+AM_DEFAULT_V
+AM_V
+am__untar
+am__tar
+AMTAR
+am__leading_dot
+SET_MAKE
+AWK
+mkdir_p
+MKDIR_P
+INSTALL_STRIP_PROGRAM
+STRIP
+install_sh
+MAKEINFO
+AUTOHEADER
+AUTOMAKE
+AUTOCONF
+ACLOCAL
+VERSION
+PACKAGE
+CYGPATH_W
+am__isrc
+INSTALL_DATA
+INSTALL_SCRIPT
+INSTALL_PROGRAM
+target_os
+target_vendor
+target_cpu
+target
+host_os
+host_vendor
+host_cpu
+host
+build_os
+build_vendor
+build_cpu
+build
+target_alias
+host_alias
+build_alias
+LIBS
+ECHO_T
+ECHO_N
+ECHO_C
+DEFS
+mandir
+localedir
+libdir
+psdir
+pdfdir
+dvidir
+htmldir
+infodir
+docdir
+oldincludedir
+includedir
+runstatedir
+localstatedir
+sharedstatedir
+sysconfdir
+datadir
+datarootdir
+libexecdir
+sbindir
+bindir
+program_transform_name
+prefix
+exec_prefix
+PACKAGE_URL
+PACKAGE_BUGREPORT
+PACKAGE_STRING
+PACKAGE_VERSION
+PACKAGE_TARNAME
+PACKAGE_NAME
+PATH_SEPARATOR
+SHELL'
+ac_subst_files=''
+ac_user_opts='
+enable_option_checking
+enable_silent_rules
+enable_maintainer_mode
+enable_dependency_tracking
+enable_shared
+enable_static
+with_pic
+enable_fast_install
+with_aix_soname
+with_gnu_ld
+with_sysroot
+enable_libtool_lock
+enable_coredump
+enable_ptrace
+enable_setjmp
+enable_documentation
+enable_tests
+enable_debug
+enable_cxx_exceptions
+enable_debug_frame
+enable_block_signals
+enable_conservative_checks
+enable_msabi_support
+enable_minidebuginfo
+enable_per_thread_cache
+'
+      ac_precious_vars='build_alias
+host_alias
+target_alias
+CC
+CFLAGS
+LDFLAGS
+LIBS
+CPPFLAGS
+CXX
+CXXFLAGS
+CCC
+LT_SYS_LIBRARY_PATH
+CPP
+CXXCPP
+CCAS
+CCASFLAGS'
+
+
+# Initialize some variables set by options.
+ac_init_help=
+ac_init_version=false
+ac_unrecognized_opts=
+ac_unrecognized_sep=
+# The variables have the same names as the options, with
+# dashes changed to underlines.
+cache_file=/dev/null
+exec_prefix=NONE
+no_create=
+no_recursion=
+prefix=NONE
+program_prefix=NONE
+program_suffix=NONE
+program_transform_name=s,x,x,
+silent=
+site=
+srcdir=
+verbose=
+x_includes=NONE
+x_libraries=NONE
+
+# Installation directory options.
+# These are left unexpanded so users can "make install exec_prefix=/foo"
+# and all the variables that are supposed to be based on exec_prefix
+# by default will actually change.
+# Use braces instead of parens because sh, perl, etc. also accept them.
+# (The list follows the same order as the GNU Coding Standards.)
+bindir='${exec_prefix}/bin'
+sbindir='${exec_prefix}/sbin'
+libexecdir='${exec_prefix}/libexec'
+datarootdir='${prefix}/share'
+datadir='${datarootdir}'
+sysconfdir='${prefix}/etc'
+sharedstatedir='${prefix}/com'
+localstatedir='${prefix}/var'
+runstatedir='${localstatedir}/run'
+includedir='${prefix}/include'
+oldincludedir='/usr/include'
+docdir='${datarootdir}/doc/${PACKAGE_TARNAME}'
+infodir='${datarootdir}/info'
+htmldir='${docdir}'
+dvidir='${docdir}'
+pdfdir='${docdir}'
+psdir='${docdir}'
+libdir='${exec_prefix}/lib'
+localedir='${datarootdir}/locale'
+mandir='${datarootdir}/man'
+
+ac_prev=
+ac_dashdash=
+for ac_option
+do
+  # If the previous option needs an argument, assign it.
+  if test -n "$ac_prev"; then
+    eval $ac_prev=\$ac_option
+    ac_prev=
+    continue
+  fi
+
+  case $ac_option in
+  *=?*) ac_optarg=`expr "X$ac_option" : '[^=]*=\(.*\)'` ;;
+  *=)   ac_optarg= ;;
+  *)    ac_optarg=yes ;;
+  esac
+
+  # Accept the important Cygnus configure options, so we can diagnose typos.
+
+  case $ac_dashdash$ac_option in
+  --)
+    ac_dashdash=yes ;;
+
+  -bindir | --bindir | --bindi | --bind | --bin | --bi)
+    ac_prev=bindir ;;
+  -bindir=* | --bindir=* | --bindi=* | --bind=* | --bin=* | --bi=*)
+    bindir=$ac_optarg ;;
+
+  -build | --build | --buil | --bui | --bu)
+    ac_prev=build_alias ;;
+  -build=* | --build=* | --buil=* | --bui=* | --bu=*)
+    build_alias=$ac_optarg ;;
+
+  -cache-file | --cache-file | --cache-fil | --cache-fi \
+  | --cache-f | --cache- | --cache | --cach | --cac | --ca | --c)
+    ac_prev=cache_file ;;
+  -cache-file=* | --cache-file=* | --cache-fil=* | --cache-fi=* \
+  | --cache-f=* | --cache-=* | --cache=* | --cach=* | --cac=* | --ca=* | --c=*)
+    cache_file=$ac_optarg ;;
+
+  --config-cache | -C)
+    cache_file=config.cache ;;
+
+  -datadir | --datadir | --datadi | --datad)
+    ac_prev=datadir ;;
+  -datadir=* | --datadir=* | --datadi=* | --datad=*)
+    datadir=$ac_optarg ;;
+
+  -datarootdir | --datarootdir | --datarootdi | --datarootd | --dataroot \
+  | --dataroo | --dataro | --datar)
+    ac_prev=datarootdir ;;
+  -datarootdir=* | --datarootdir=* | --datarootdi=* | --datarootd=* \
+  | --dataroot=* | --dataroo=* | --dataro=* | --datar=*)
+    datarootdir=$ac_optarg ;;
+
+  -disable-* | --disable-*)
+    ac_useropt=`expr "x$ac_option" : 'x-*disable-\(.*\)'`
+    # Reject names that are not valid shell variable names.
+    expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
+      as_fn_error $? "invalid feature name: $ac_useropt"
+    ac_useropt_orig=$ac_useropt
+    ac_useropt=`$as_echo "$ac_useropt" | sed 's/[-+.]/_/g'`
+    case $ac_user_opts in
+      *"
+"enable_$ac_useropt"
+"*) ;;
+      *) ac_unrecognized_opts="$ac_unrecognized_opts$ac_unrecognized_sep--disable-$ac_useropt_orig"
+	 ac_unrecognized_sep=', ';;
+    esac
+    eval enable_$ac_useropt=no ;;
+
+  -docdir | --docdir | --docdi | --doc | --do)
+    ac_prev=docdir ;;
+  -docdir=* | --docdir=* | --docdi=* | --doc=* | --do=*)
+    docdir=$ac_optarg ;;
+
+  -dvidir | --dvidir | --dvidi | --dvid | --dvi | --dv)
+    ac_prev=dvidir ;;
+  -dvidir=* | --dvidir=* | --dvidi=* | --dvid=* | --dvi=* | --dv=*)
+    dvidir=$ac_optarg ;;
+
+  -enable-* | --enable-*)
+    ac_useropt=`expr "x$ac_option" : 'x-*enable-\([^=]*\)'`
+    # Reject names that are not valid shell variable names.
+    expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
+      as_fn_error $? "invalid feature name: $ac_useropt"
+    ac_useropt_orig=$ac_useropt
+    ac_useropt=`$as_echo "$ac_useropt" | sed 's/[-+.]/_/g'`
+    case $ac_user_opts in
+      *"
+"enable_$ac_useropt"
+"*) ;;
+      *) ac_unrecognized_opts="$ac_unrecognized_opts$ac_unrecognized_sep--enable-$ac_useropt_orig"
+	 ac_unrecognized_sep=', ';;
+    esac
+    eval enable_$ac_useropt=\$ac_optarg ;;
+
+  -exec-prefix | --exec_prefix | --exec-prefix | --exec-prefi \
+  | --exec-pref | --exec-pre | --exec-pr | --exec-p | --exec- \
+  | --exec | --exe | --ex)
+    ac_prev=exec_prefix ;;
+  -exec-prefix=* | --exec_prefix=* | --exec-prefix=* | --exec-prefi=* \
+  | --exec-pref=* | --exec-pre=* | --exec-pr=* | --exec-p=* | --exec-=* \
+  | --exec=* | --exe=* | --ex=*)
+    exec_prefix=$ac_optarg ;;
+
+  -gas | --gas | --ga | --g)
+    # Obsolete; use --with-gas.
+    with_gas=yes ;;
+
+  -help | --help | --hel | --he | -h)
+    ac_init_help=long ;;
+  -help=r* | --help=r* | --hel=r* | --he=r* | -hr*)
+    ac_init_help=recursive ;;
+  -help=s* | --help=s* | --hel=s* | --he=s* | -hs*)
+    ac_init_help=short ;;
+
+  -host | --host | --hos | --ho)
+    ac_prev=host_alias ;;
+  -host=* | --host=* | --hos=* | --ho=*)
+    host_alias=$ac_optarg ;;
+
+  -htmldir | --htmldir | --htmldi | --htmld | --html | --htm | --ht)
+    ac_prev=htmldir ;;
+  -htmldir=* | --htmldir=* | --htmldi=* | --htmld=* | --html=* | --htm=* \
+  | --ht=*)
+    htmldir=$ac_optarg ;;
+
+  -includedir | --includedir | --includedi | --included | --include \
+  | --includ | --inclu | --incl | --inc)
+    ac_prev=includedir ;;
+  -includedir=* | --includedir=* | --includedi=* | --included=* | --include=* \
+  | --includ=* | --inclu=* | --incl=* | --inc=*)
+    includedir=$ac_optarg ;;
+
+  -infodir | --infodir | --infodi | --infod | --info | --inf)
+    ac_prev=infodir ;;
+  -infodir=* | --infodir=* | --infodi=* | --infod=* | --info=* | --inf=*)
+    infodir=$ac_optarg ;;
+
+  -libdir | --libdir | --libdi | --libd)
+    ac_prev=libdir ;;
+  -libdir=* | --libdir=* | --libdi=* | --libd=*)
+    libdir=$ac_optarg ;;
+
+  -libexecdir | --libexecdir | --libexecdi | --libexecd | --libexec \
+  | --libexe | --libex | --libe)
+    ac_prev=libexecdir ;;
+  -libexecdir=* | --libexecdir=* | --libexecdi=* | --libexecd=* | --libexec=* \
+  | --libexe=* | --libex=* | --libe=*)
+    libexecdir=$ac_optarg ;;
+
+  -localedir | --localedir | --localedi | --localed | --locale)
+    ac_prev=localedir ;;
+  -localedir=* | --localedir=* | --localedi=* | --localed=* | --locale=*)
+    localedir=$ac_optarg ;;
+
+  -localstatedir | --localstatedir | --localstatedi | --localstated \
+  | --localstate | --localstat | --localsta | --localst | --locals)
+    ac_prev=localstatedir ;;
+  -localstatedir=* | --localstatedir=* | --localstatedi=* | --localstated=* \
+  | --localstate=* | --localstat=* | --localsta=* | --localst=* | --locals=*)
+    localstatedir=$ac_optarg ;;
+
+  -mandir | --mandir | --mandi | --mand | --man | --ma | --m)
+    ac_prev=mandir ;;
+  -mandir=* | --mandir=* | --mandi=* | --mand=* | --man=* | --ma=* | --m=*)
+    mandir=$ac_optarg ;;
+
+  -nfp | --nfp | --nf)
+    # Obsolete; use --without-fp.
+    with_fp=no ;;
+
+  -no-create | --no-create | --no-creat | --no-crea | --no-cre \
+  | --no-cr | --no-c | -n)
+    no_create=yes ;;
+
+  -no-recursion | --no-recursion | --no-recursio | --no-recursi \
+  | --no-recurs | --no-recur | --no-recu | --no-rec | --no-re | --no-r)
+    no_recursion=yes ;;
+
+  -oldincludedir | --oldincludedir | --oldincludedi | --oldincluded \
+  | --oldinclude | --oldinclud | --oldinclu | --oldincl | --oldinc \
+  | --oldin | --oldi | --old | --ol | --o)
+    ac_prev=oldincludedir ;;
+  -oldincludedir=* | --oldincludedir=* | --oldincludedi=* | --oldincluded=* \
+  | --oldinclude=* | --oldinclud=* | --oldinclu=* | --oldincl=* | --oldinc=* \
+  | --oldin=* | --oldi=* | --old=* | --ol=* | --o=*)
+    oldincludedir=$ac_optarg ;;
+
+  -prefix | --prefix | --prefi | --pref | --pre | --pr | --p)
+    ac_prev=prefix ;;
+  -prefix=* | --prefix=* | --prefi=* | --pref=* | --pre=* | --pr=* | --p=*)
+    prefix=$ac_optarg ;;
+
+  -program-prefix | --program-prefix | --program-prefi | --program-pref \
+  | --program-pre | --program-pr | --program-p)
+    ac_prev=program_prefix ;;
+  -program-prefix=* | --program-prefix=* | --program-prefi=* \
+  | --program-pref=* | --program-pre=* | --program-pr=* | --program-p=*)
+    program_prefix=$ac_optarg ;;
+
+  -program-suffix | --program-suffix | --program-suffi | --program-suff \
+  | --program-suf | --program-su | --program-s)
+    ac_prev=program_suffix ;;
+  -program-suffix=* | --program-suffix=* | --program-suffi=* \
+  | --program-suff=* | --program-suf=* | --program-su=* | --program-s=*)
+    program_suffix=$ac_optarg ;;
+
+  -program-transform-name | --program-transform-name \
+  | --program-transform-nam | --program-transform-na \
+  | --program-transform-n | --program-transform- \
+  | --program-transform | --program-transfor \
+  | --program-transfo | --program-transf \
+  | --program-trans | --program-tran \
+  | --progr-tra | --program-tr | --program-t)
+    ac_prev=program_transform_name ;;
+  -program-transform-name=* | --program-transform-name=* \
+  | --program-transform-nam=* | --program-transform-na=* \
+  | --program-transform-n=* | --program-transform-=* \
+  | --program-transform=* | --program-transfor=* \
+  | --program-transfo=* | --program-transf=* \
+  | --program-trans=* | --program-tran=* \
+  | --progr-tra=* | --program-tr=* | --program-t=*)
+    program_transform_name=$ac_optarg ;;
+
+  -pdfdir | --pdfdir | --pdfdi | --pdfd | --pdf | --pd)
+    ac_prev=pdfdir ;;
+  -pdfdir=* | --pdfdir=* | --pdfdi=* | --pdfd=* | --pdf=* | --pd=*)
+    pdfdir=$ac_optarg ;;
+
+  -psdir | --psdir | --psdi | --psd | --ps)
+    ac_prev=psdir ;;
+  -psdir=* | --psdir=* | --psdi=* | --psd=* | --ps=*)
+    psdir=$ac_optarg ;;
+
+  -q | -quiet | --quiet | --quie | --qui | --qu | --q \
+  | -silent | --silent | --silen | --sile | --sil)
+    silent=yes ;;
+
+  -runstatedir | --runstatedir | --runstatedi | --runstated \
+  | --runstate | --runstat | --runsta | --runst | --runs \
+  | --run | --ru | --r)
+    ac_prev=runstatedir ;;
+  -runstatedir=* | --runstatedir=* | --runstatedi=* | --runstated=* \
+  | --runstate=* | --runstat=* | --runsta=* | --runst=* | --runs=* \
+  | --run=* | --ru=* | --r=*)
+    runstatedir=$ac_optarg ;;
+
+  -sbindir | --sbindir | --sbindi | --sbind | --sbin | --sbi | --sb)
+    ac_prev=sbindir ;;
+  -sbindir=* | --sbindir=* | --sbindi=* | --sbind=* | --sbin=* \
+  | --sbi=* | --sb=*)
+    sbindir=$ac_optarg ;;
+
+  -sharedstatedir | --sharedstatedir | --sharedstatedi \
+  | --sharedstated | --sharedstate | --sharedstat | --sharedsta \
+  | --sharedst | --shareds | --shared | --share | --shar \
+  | --sha | --sh)
+    ac_prev=sharedstatedir ;;
+  -sharedstatedir=* | --sharedstatedir=* | --sharedstatedi=* \
+  | --sharedstated=* | --sharedstate=* | --sharedstat=* | --sharedsta=* \
+  | --sharedst=* | --shareds=* | --shared=* | --share=* | --shar=* \
+  | --sha=* | --sh=*)
+    sharedstatedir=$ac_optarg ;;
+
+  -site | --site | --sit)
+    ac_prev=site ;;
+  -site=* | --site=* | --sit=*)
+    site=$ac_optarg ;;
+
+  -srcdir | --srcdir | --srcdi | --srcd | --src | --sr)
+    ac_prev=srcdir ;;
+  -srcdir=* | --srcdir=* | --srcdi=* | --srcd=* | --src=* | --sr=*)
+    srcdir=$ac_optarg ;;
+
+  -sysconfdir | --sysconfdir | --sysconfdi | --sysconfd | --sysconf \
+  | --syscon | --sysco | --sysc | --sys | --sy)
+    ac_prev=sysconfdir ;;
+  -sysconfdir=* | --sysconfdir=* | --sysconfdi=* | --sysconfd=* | --sysconf=* \
+  | --syscon=* | --sysco=* | --sysc=* | --sys=* | --sy=*)
+    sysconfdir=$ac_optarg ;;
+
+  -target | --target | --targe | --targ | --tar | --ta | --t)
+    ac_prev=target_alias ;;
+  -target=* | --target=* | --targe=* | --targ=* | --tar=* | --ta=* | --t=*)
+    target_alias=$ac_optarg ;;
+
+  -v | -verbose | --verbose | --verbos | --verbo | --verb)
+    verbose=yes ;;
+
+  -version | --version | --versio | --versi | --vers | -V)
+    ac_init_version=: ;;
+
+  -with-* | --with-*)
+    ac_useropt=`expr "x$ac_option" : 'x-*with-\([^=]*\)'`
+    # Reject names that are not valid shell variable names.
+    expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
+      as_fn_error $? "invalid package name: $ac_useropt"
+    ac_useropt_orig=$ac_useropt
+    ac_useropt=`$as_echo "$ac_useropt" | sed 's/[-+.]/_/g'`
+    case $ac_user_opts in
+      *"
+"with_$ac_useropt"
+"*) ;;
+      *) ac_unrecognized_opts="$ac_unrecognized_opts$ac_unrecognized_sep--with-$ac_useropt_orig"
+	 ac_unrecognized_sep=', ';;
+    esac
+    eval with_$ac_useropt=\$ac_optarg ;;
+
+  -without-* | --without-*)
+    ac_useropt=`expr "x$ac_option" : 'x-*without-\(.*\)'`
+    # Reject names that are not valid shell variable names.
+    expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
+      as_fn_error $? "invalid package name: $ac_useropt"
+    ac_useropt_orig=$ac_useropt
+    ac_useropt=`$as_echo "$ac_useropt" | sed 's/[-+.]/_/g'`
+    case $ac_user_opts in
+      *"
+"with_$ac_useropt"
+"*) ;;
+      *) ac_unrecognized_opts="$ac_unrecognized_opts$ac_unrecognized_sep--without-$ac_useropt_orig"
+	 ac_unrecognized_sep=', ';;
+    esac
+    eval with_$ac_useropt=no ;;
+
+  --x)
+    # Obsolete; use --with-x.
+    with_x=yes ;;
+
+  -x-includes | --x-includes | --x-include | --x-includ | --x-inclu \
+  | --x-incl | --x-inc | --x-in | --x-i)
+    ac_prev=x_includes ;;
+  -x-includes=* | --x-includes=* | --x-include=* | --x-includ=* | --x-inclu=* \
+  | --x-incl=* | --x-inc=* | --x-in=* | --x-i=*)
+    x_includes=$ac_optarg ;;
+
+  -x-libraries | --x-libraries | --x-librarie | --x-librari \
+  | --x-librar | --x-libra | --x-libr | --x-lib | --x-li | --x-l)
+    ac_prev=x_libraries ;;
+  -x-libraries=* | --x-libraries=* | --x-librarie=* | --x-librari=* \
+  | --x-librar=* | --x-libra=* | --x-libr=* | --x-lib=* | --x-li=* | --x-l=*)
+    x_libraries=$ac_optarg ;;
+
+  -*) as_fn_error $? "unrecognized option: \`$ac_option'
+Try \`$0 --help' for more information"
+    ;;
+
+  *=*)
+    ac_envvar=`expr "x$ac_option" : 'x\([^=]*\)='`
+    # Reject names that are not valid shell variable names.
+    case $ac_envvar in #(
+      '' | [0-9]* | *[!_$as_cr_alnum]* )
+      as_fn_error $? "invalid variable name: \`$ac_envvar'" ;;
+    esac
+    eval $ac_envvar=\$ac_optarg
+    export $ac_envvar ;;
+
+  *)
+    # FIXME: should be removed in autoconf 3.0.
+    $as_echo "$as_me: WARNING: you should use --build, --host, --target" >&2
+    expr "x$ac_option" : ".*[^-._$as_cr_alnum]" >/dev/null &&
+      $as_echo "$as_me: WARNING: invalid host type: $ac_option" >&2
+    : "${build_alias=$ac_option} ${host_alias=$ac_option} ${target_alias=$ac_option}"
+    ;;
+
+  esac
+done
+
+if test -n "$ac_prev"; then
+  ac_option=--`echo $ac_prev | sed 's/_/-/g'`
+  as_fn_error $? "missing argument to $ac_option"
+fi
+
+if test -n "$ac_unrecognized_opts"; then
+  case $enable_option_checking in
+    no) ;;
+    fatal) as_fn_error $? "unrecognized options: $ac_unrecognized_opts" ;;
+    *)     $as_echo "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2 ;;
+  esac
+fi
+
+# Check all directory arguments for consistency.
+for ac_var in	exec_prefix prefix bindir sbindir libexecdir datarootdir \
+		datadir sysconfdir sharedstatedir localstatedir includedir \
+		oldincludedir docdir infodir htmldir dvidir pdfdir psdir \
+		libdir localedir mandir runstatedir
+do
+  eval ac_val=\$$ac_var
+  # Remove trailing slashes.
+  case $ac_val in
+    */ )
+      ac_val=`expr "X$ac_val" : 'X\(.*[^/]\)' \| "X$ac_val" : 'X\(.*\)'`
+      eval $ac_var=\$ac_val;;
+  esac
+  # Be sure to have absolute directory names.
+  case $ac_val in
+    [\\/$]* | ?:[\\/]* )  continue;;
+    NONE | '' ) case $ac_var in *prefix ) continue;; esac;;
+  esac
+  as_fn_error $? "expected an absolute directory name for --$ac_var: $ac_val"
+done
+
+# There might be people who depend on the old broken behavior: `$host'
+# used to hold the argument of --host etc.
+# FIXME: To remove some day.
+build=$build_alias
+host=$host_alias
+target=$target_alias
+
+# FIXME: To remove some day.
+if test "x$host_alias" != x; then
+  if test "x$build_alias" = x; then
+    cross_compiling=maybe
+  elif test "x$build_alias" != "x$host_alias"; then
+    cross_compiling=yes
+  fi
+fi
+
+ac_tool_prefix=
+test -n "$host_alias" && ac_tool_prefix=$host_alias-
+
+test "$silent" = yes && exec 6>/dev/null
+
+
+ac_pwd=`pwd` && test -n "$ac_pwd" &&
+ac_ls_di=`ls -di .` &&
+ac_pwd_ls_di=`cd "$ac_pwd" && ls -di .` ||
+  as_fn_error $? "working directory cannot be determined"
+test "X$ac_ls_di" = "X$ac_pwd_ls_di" ||
+  as_fn_error $? "pwd does not report name of working directory"
+
+
+# Find the source files, if location was not specified.
+if test -z "$srcdir"; then
+  ac_srcdir_defaulted=yes
+  # Try the directory containing this script, then the parent directory.
+  ac_confdir=`$as_dirname -- "$as_myself" ||
+$as_expr X"$as_myself" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	 X"$as_myself" : 'X\(//\)[^/]' \| \
+	 X"$as_myself" : 'X\(//\)$' \| \
+	 X"$as_myself" : 'X\(/\)' \| . 2>/dev/null ||
+$as_echo X"$as_myself" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)[^/].*/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+  srcdir=$ac_confdir
+  if test ! -r "$srcdir/$ac_unique_file"; then
+    srcdir=..
+  fi
+else
+  ac_srcdir_defaulted=no
+fi
+if test ! -r "$srcdir/$ac_unique_file"; then
+  test "$ac_srcdir_defaulted" = yes && srcdir="$ac_confdir or .."
+  as_fn_error $? "cannot find sources ($ac_unique_file) in $srcdir"
+fi
+ac_msg="sources are in $srcdir, but \`cd $srcdir' does not work"
+ac_abs_confdir=`(
+	cd "$srcdir" && test -r "./$ac_unique_file" || as_fn_error $? "$ac_msg"
+	pwd)`
+# When building in place, set srcdir=.
+if test "$ac_abs_confdir" = "$ac_pwd"; then
+  srcdir=.
+fi
+# Remove unnecessary trailing slashes from srcdir.
+# Double slashes in file names in object file debugging info
+# mess up M-x gdb in Emacs.
+case $srcdir in
+*/) srcdir=`expr "X$srcdir" : 'X\(.*[^/]\)' \| "X$srcdir" : 'X\(.*\)'`;;
+esac
+for ac_var in $ac_precious_vars; do
+  eval ac_env_${ac_var}_set=\${${ac_var}+set}
+  eval ac_env_${ac_var}_value=\$${ac_var}
+  eval ac_cv_env_${ac_var}_set=\${${ac_var}+set}
+  eval ac_cv_env_${ac_var}_value=\$${ac_var}
+done
+
+#
+# Report the --help message.
+#
+if test "$ac_init_help" = "long"; then
+  # Omit some internal or obsolete options to make the list less imposing.
+  # This message is too long to be a string in the A/UX 3.1 sh.
+  cat <<_ACEOF
+\`configure' configures libunwind 1.4-rc1 to adapt to many kinds of systems.
+
+Usage: $0 [OPTION]... [VAR=VALUE]...
+
+To assign environment variables (e.g., CC, CFLAGS...), specify them as
+VAR=VALUE.  See below for descriptions of some of the useful variables.
+
+Defaults for the options are specified in brackets.
+
+Configuration:
+  -h, --help              display this help and exit
+      --help=short        display options specific to this package
+      --help=recursive    display the short help of all the included packages
+  -V, --version           display version information and exit
+  -q, --quiet, --silent   do not print \`checking ...' messages
+      --cache-file=FILE   cache test results in FILE [disabled]
+  -C, --config-cache      alias for \`--cache-file=config.cache'
+  -n, --no-create         do not create output files
+      --srcdir=DIR        find the sources in DIR [configure dir or \`..']
+
+Installation directories:
+  --prefix=PREFIX         install architecture-independent files in PREFIX
+                          [$ac_default_prefix]
+  --exec-prefix=EPREFIX   install architecture-dependent files in EPREFIX
+                          [PREFIX]
+
+By default, \`make install' will install all the files in
+\`$ac_default_prefix/bin', \`$ac_default_prefix/lib' etc.  You can specify
+an installation prefix other than \`$ac_default_prefix' using \`--prefix',
+for instance \`--prefix=\$HOME'.
+
+For better control, use the options below.
+
+Fine tuning of the installation directories:
+  --bindir=DIR            user executables [EPREFIX/bin]
+  --sbindir=DIR           system admin executables [EPREFIX/sbin]
+  --libexecdir=DIR        program executables [EPREFIX/libexec]
+  --sysconfdir=DIR        read-only single-machine data [PREFIX/etc]
+  --sharedstatedir=DIR    modifiable architecture-independent data [PREFIX/com]
+  --localstatedir=DIR     modifiable single-machine data [PREFIX/var]
+  --runstatedir=DIR       modifiable per-process data [LOCALSTATEDIR/run]
+  --libdir=DIR            object code libraries [EPREFIX/lib]
+  --includedir=DIR        C header files [PREFIX/include]
+  --oldincludedir=DIR     C header files for non-gcc [/usr/include]
+  --datarootdir=DIR       read-only arch.-independent data root [PREFIX/share]
+  --datadir=DIR           read-only architecture-independent data [DATAROOTDIR]
+  --infodir=DIR           info documentation [DATAROOTDIR/info]
+  --localedir=DIR         locale-dependent data [DATAROOTDIR/locale]
+  --mandir=DIR            man documentation [DATAROOTDIR/man]
+  --docdir=DIR            documentation root [DATAROOTDIR/doc/libunwind]
+  --htmldir=DIR           html documentation [DOCDIR]
+  --dvidir=DIR            dvi documentation [DOCDIR]
+  --pdfdir=DIR            pdf documentation [DOCDIR]
+  --psdir=DIR             ps documentation [DOCDIR]
+_ACEOF
+
+  cat <<\_ACEOF
+
+Program names:
+  --program-prefix=PREFIX            prepend PREFIX to installed program names
+  --program-suffix=SUFFIX            append SUFFIX to installed program names
+  --program-transform-name=PROGRAM   run sed PROGRAM on installed program names
+
+System types:
+  --build=BUILD     configure for building on BUILD [guessed]
+  --host=HOST       cross-compile to build programs to run on HOST [BUILD]
+  --target=TARGET   configure for building compilers for TARGET [HOST]
+_ACEOF
+fi
+
+if test -n "$ac_init_help"; then
+  case $ac_init_help in
+     short | recursive ) echo "Configuration of libunwind 1.4-rc1:";;
+   esac
+  cat <<\_ACEOF
+
+Optional Features:
+  --disable-option-checking  ignore unrecognized --enable/--with options
+  --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
+  --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
+  --enable-silent-rules   less verbose build output (undo: "make V=1")
+  --disable-silent-rules  verbose build output (undo: "make V=0")
+  --enable-maintainer-mode
+                          enable make rules and dependencies not useful (and
+                          sometimes confusing) to the casual installer
+  --enable-dependency-tracking
+                          do not reject slow dependency extractors
+  --disable-dependency-tracking
+                          speeds up one-time build
+  --enable-shared[=PKGS]  build shared libraries [default=yes]
+  --enable-static[=PKGS]  build static libraries [default=yes]
+  --enable-fast-install[=PKGS]
+                          optimize for fast installation [default=yes]
+  --disable-libtool-lock  avoid locking (might break parallel builds)
+  --enable-coredump       building libunwind-coredump library
+  --enable-ptrace         building libunwind-ptrace library
+  --enable-setjmp         building libunwind-setjmp library
+  --disable-documentation Disable generating the man pages
+  --disable-tests         Disable tests build
+  --enable-debug          turn on debug support (slows down execution)
+  --enable-cxx-exceptions use libunwind to handle C++ exceptions
+  --enable-debug-frame    Load the ".debug_frame" section if available
+  --enable-block-signals  Block signals before performing mutex operations
+  --enable-conservative-checks
+                          Validate all memory addresses before use
+  --enable-msabi-support  Enables support for Microsoft ABI extensions
+  --enable-minidebuginfo  Enables support for LZMA-compressed symbol tables
+  --enable-per-thread-cache
+                          build with support for UNW_CACHE_PER_THREAD (which
+                          imposes a hight TLS memory usage) (default:
+                          disabled)
+
+Optional Packages:
+  --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
+  --without-PACKAGE       do not use PACKAGE (same as --with-PACKAGE=no)
+  --with-pic[=PKGS]       try to use only PIC/non-PIC objects [default=use
+                          both]
+  --with-aix-soname=aix|svr4|both
+                          shared library versioning (aka "SONAME") variant to
+                          provide on AIX, [default=aix].
+  --with-gnu-ld           assume the C compiler uses GNU ld [default=no]
+  --with-sysroot[=DIR]    Search for dependent libraries within DIR (or the
+                          compiler's sysroot if not specified).
+
+Some influential environment variables:
+  CC          C compiler command
+  CFLAGS      C compiler flags
+  LDFLAGS     linker flags, e.g. -L<lib dir> if you have libraries in a
+              nonstandard directory <lib dir>
+  LIBS        libraries to pass to the linker, e.g. -l<library>
+  CPPFLAGS    (Objective) C/C++ preprocessor flags, e.g. -I<include dir> if
+              you have headers in a nonstandard directory <include dir>
+  CXX         C++ compiler command
+  CXXFLAGS    C++ compiler flags
+  LT_SYS_LIBRARY_PATH
+              User-defined run-time library search path.
+  CPP         C preprocessor
+  CXXCPP      C++ preprocessor
+  CCAS        assembler compiler command (defaults to CC)
+  CCASFLAGS   assembler compiler flags (defaults to CFLAGS)
+
+Use these variables to override the choices made by `configure' or to help
+it to find libraries and programs with nonstandard names/locations.
+
+Report bugs to <libunwind-devel@nongnu.org>.
+_ACEOF
+ac_status=$?
+fi
+
+if test "$ac_init_help" = "recursive"; then
+  # If there are subdirs, report their specific --help.
+  for ac_dir in : $ac_subdirs_all; do test "x$ac_dir" = x: && continue
+    test -d "$ac_dir" ||
+      { cd "$srcdir" && ac_pwd=`pwd` && srcdir=. && test -d "$ac_dir"; } ||
+      continue
+    ac_builddir=.
+
+case "$ac_dir" in
+.) ac_dir_suffix= ac_top_builddir_sub=. ac_top_build_prefix= ;;
+*)
+  ac_dir_suffix=/`$as_echo "$ac_dir" | sed 's|^\.[\\/]||'`
+  # A ".." for each directory in $ac_dir_suffix.
+  ac_top_builddir_sub=`$as_echo "$ac_dir_suffix" | sed 's|/[^\\/]*|/..|g;s|/||'`
+  case $ac_top_builddir_sub in
+  "") ac_top_builddir_sub=. ac_top_build_prefix= ;;
+  *)  ac_top_build_prefix=$ac_top_builddir_sub/ ;;
+  esac ;;
+esac
+ac_abs_top_builddir=$ac_pwd
+ac_abs_builddir=$ac_pwd$ac_dir_suffix
+# for backward compatibility:
+ac_top_builddir=$ac_top_build_prefix
+
+case $srcdir in
+  .)  # We are building in place.
+    ac_srcdir=.
+    ac_top_srcdir=$ac_top_builddir_sub
+    ac_abs_top_srcdir=$ac_pwd ;;
+  [\\/]* | ?:[\\/]* )  # Absolute name.
+    ac_srcdir=$srcdir$ac_dir_suffix;
+    ac_top_srcdir=$srcdir
+    ac_abs_top_srcdir=$srcdir ;;
+  *) # Relative name.
+    ac_srcdir=$ac_top_build_prefix$srcdir$ac_dir_suffix
+    ac_top_srcdir=$ac_top_build_prefix$srcdir
+    ac_abs_top_srcdir=$ac_pwd/$srcdir ;;
+esac
+ac_abs_srcdir=$ac_abs_top_srcdir$ac_dir_suffix
+
+    cd "$ac_dir" || { ac_status=$?; continue; }
+    # Check for guested configure.
+    if test -f "$ac_srcdir/configure.gnu"; then
+      echo &&
+      $SHELL "$ac_srcdir/configure.gnu" --help=recursive
+    elif test -f "$ac_srcdir/configure"; then
+      echo &&
+      $SHELL "$ac_srcdir/configure" --help=recursive
+    else
+      $as_echo "$as_me: WARNING: no configuration information is in $ac_dir" >&2
+    fi || ac_status=$?
+    cd "$ac_pwd" || { ac_status=$?; break; }
+  done
+fi
+
+test -n "$ac_init_help" && exit $ac_status
+if $ac_init_version; then
+  cat <<\_ACEOF
+libunwind configure 1.4-rc1
+generated by GNU Autoconf 2.69
+
+Copyright (C) 2012 Free Software Foundation, Inc.
+This configure script is free software; the Free Software Foundation
+gives unlimited permission to copy, distribute and modify it.
+_ACEOF
+  exit
+fi
+
+## ------------------------ ##
+## Autoconf initialization. ##
+## ------------------------ ##
+
+# ac_fn_c_try_compile LINENO
+# --------------------------
+# Try to compile conftest.$ac_ext, and return whether this succeeded.
+ac_fn_c_try_compile ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  rm -f conftest.$ac_objext
+  if { { ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_compile") 2>conftest.err
+  ac_status=$?
+  if test -s conftest.err; then
+    grep -v '^ *+' conftest.err >conftest.er1
+    cat conftest.er1 >&5
+    mv -f conftest.er1 conftest.err
+  fi
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest.$ac_objext; then :
+  ac_retval=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	ac_retval=1
+fi
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  as_fn_set_status $ac_retval
+
+} # ac_fn_c_try_compile
+
+# ac_fn_cxx_try_compile LINENO
+# ----------------------------
+# Try to compile conftest.$ac_ext, and return whether this succeeded.
+ac_fn_cxx_try_compile ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  rm -f conftest.$ac_objext
+  if { { ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_compile") 2>conftest.err
+  ac_status=$?
+  if test -s conftest.err; then
+    grep -v '^ *+' conftest.err >conftest.er1
+    cat conftest.er1 >&5
+    mv -f conftest.er1 conftest.err
+  fi
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && {
+	 test -z "$ac_cxx_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest.$ac_objext; then :
+  ac_retval=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	ac_retval=1
+fi
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  as_fn_set_status $ac_retval
+
+} # ac_fn_cxx_try_compile
+
+# ac_fn_c_try_link LINENO
+# -----------------------
+# Try to link conftest.$ac_ext, and return whether this succeeded.
+ac_fn_c_try_link ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  rm -f conftest.$ac_objext conftest$ac_exeext
+  if { { ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_link") 2>conftest.err
+  ac_status=$?
+  if test -s conftest.err; then
+    grep -v '^ *+' conftest.err >conftest.er1
+    cat conftest.er1 >&5
+    mv -f conftest.er1 conftest.err
+  fi
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest$ac_exeext && {
+	 test "$cross_compiling" = yes ||
+	 test -x conftest$ac_exeext
+       }; then :
+  ac_retval=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	ac_retval=1
+fi
+  # Delete the IPA/IPO (Inter Procedural Analysis/Optimization) information
+  # created by the PGI compiler (conftest_ipa8_conftest.oo), as it would
+  # interfere with the next link command; also delete a directory that is
+  # left behind by Apple's compiler.  We do this before executing the actions.
+  rm -rf conftest.dSYM conftest_ipa8_conftest.oo
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  as_fn_set_status $ac_retval
+
+} # ac_fn_c_try_link
+
+# ac_fn_c_check_header_compile LINENO HEADER VAR INCLUDES
+# -------------------------------------------------------
+# Tests whether HEADER exists and can be compiled using the include files in
+# INCLUDES, setting the cache variable VAR accordingly.
+ac_fn_c_check_header_compile ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
+$as_echo_n "checking for $2... " >&6; }
+if eval \${$3+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+#include <$2>
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  eval "$3=yes"
+else
+  eval "$3=no"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+eval ac_res=\$$3
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+
+} # ac_fn_c_check_header_compile
+
+# ac_fn_c_try_cpp LINENO
+# ----------------------
+# Try to preprocess conftest.$ac_ext, and return whether this succeeded.
+ac_fn_c_try_cpp ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  if { { ac_try="$ac_cpp conftest.$ac_ext"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_cpp conftest.$ac_ext") 2>conftest.err
+  ac_status=$?
+  if test -s conftest.err; then
+    grep -v '^ *+' conftest.err >conftest.er1
+    cat conftest.er1 >&5
+    mv -f conftest.er1 conftest.err
+  fi
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } > conftest.i && {
+	 test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       }; then :
+  ac_retval=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+    ac_retval=1
+fi
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  as_fn_set_status $ac_retval
+
+} # ac_fn_c_try_cpp
+
+# ac_fn_c_try_run LINENO
+# ----------------------
+# Try to link conftest.$ac_ext, and return whether this succeeded. Assumes
+# that executables *can* be run.
+ac_fn_c_try_run ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  if { { ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_link") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && { ac_try='./conftest$ac_exeext'
+  { { case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_try") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }; then :
+  ac_retval=0
+else
+  $as_echo "$as_me: program exited with status $ac_status" >&5
+       $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+       ac_retval=$ac_status
+fi
+  rm -rf conftest.dSYM conftest_ipa8_conftest.oo
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  as_fn_set_status $ac_retval
+
+} # ac_fn_c_try_run
+
+# ac_fn_c_check_func LINENO FUNC VAR
+# ----------------------------------
+# Tests whether FUNC exists, setting the cache variable VAR accordingly
+ac_fn_c_check_func ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
+$as_echo_n "checking for $2... " >&6; }
+if eval \${$3+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+/* Define $2 to an innocuous variant, in case <limits.h> declares $2.
+   For example, HP-UX 11i <limits.h> declares gettimeofday.  */
+#define $2 innocuous_$2
+
+/* System header to define __stub macros and hopefully few prototypes,
+    which can conflict with char $2 (); below.
+    Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
+    <limits.h> exists even on freestanding compilers.  */
+
+#ifdef __STDC__
+# include <limits.h>
+#else
+# include <assert.h>
+#endif
+
+#undef $2
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char $2 ();
+/* The GNU C library defines this for functions which it implements
+    to always fail with ENOSYS.  Some functions are actually named
+    something starting with __ and the normal name is an alias.  */
+#if defined __stub_$2 || defined __stub___$2
+choke me
+#endif
+
+int
+main ()
+{
+return $2 ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  eval "$3=yes"
+else
+  eval "$3=no"
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+fi
+eval ac_res=\$$3
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+
+} # ac_fn_c_check_func
+
+# ac_fn_cxx_try_cpp LINENO
+# ------------------------
+# Try to preprocess conftest.$ac_ext, and return whether this succeeded.
+ac_fn_cxx_try_cpp ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  if { { ac_try="$ac_cpp conftest.$ac_ext"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_cpp conftest.$ac_ext") 2>conftest.err
+  ac_status=$?
+  if test -s conftest.err; then
+    grep -v '^ *+' conftest.err >conftest.er1
+    cat conftest.er1 >&5
+    mv -f conftest.er1 conftest.err
+  fi
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } > conftest.i && {
+	 test -z "$ac_cxx_preproc_warn_flag$ac_cxx_werror_flag" ||
+	 test ! -s conftest.err
+       }; then :
+  ac_retval=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+    ac_retval=1
+fi
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  as_fn_set_status $ac_retval
+
+} # ac_fn_cxx_try_cpp
+
+# ac_fn_cxx_try_link LINENO
+# -------------------------
+# Try to link conftest.$ac_ext, and return whether this succeeded.
+ac_fn_cxx_try_link ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  rm -f conftest.$ac_objext conftest$ac_exeext
+  if { { ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_link") 2>conftest.err
+  ac_status=$?
+  if test -s conftest.err; then
+    grep -v '^ *+' conftest.err >conftest.er1
+    cat conftest.er1 >&5
+    mv -f conftest.er1 conftest.err
+  fi
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && {
+	 test -z "$ac_cxx_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest$ac_exeext && {
+	 test "$cross_compiling" = yes ||
+	 test -x conftest$ac_exeext
+       }; then :
+  ac_retval=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	ac_retval=1
+fi
+  # Delete the IPA/IPO (Inter Procedural Analysis/Optimization) information
+  # created by the PGI compiler (conftest_ipa8_conftest.oo), as it would
+  # interfere with the next link command; also delete a directory that is
+  # left behind by Apple's compiler.  We do this before executing the actions.
+  rm -rf conftest.dSYM conftest_ipa8_conftest.oo
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  as_fn_set_status $ac_retval
+
+} # ac_fn_cxx_try_link
+
+# ac_fn_c_check_header_mongrel LINENO HEADER VAR INCLUDES
+# -------------------------------------------------------
+# Tests whether HEADER exists, giving a warning if it cannot be compiled using
+# the include files in INCLUDES and setting the cache variable VAR
+# accordingly.
+ac_fn_c_check_header_mongrel ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  if eval \${$3+:} false; then :
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
+$as_echo_n "checking for $2... " >&6; }
+if eval \${$3+:} false; then :
+  $as_echo_n "(cached) " >&6
+fi
+eval ac_res=\$$3
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+else
+  # Is the header compilable?
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking $2 usability" >&5
+$as_echo_n "checking $2 usability... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+#include <$2>
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_header_compiler=yes
+else
+  ac_header_compiler=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_header_compiler" >&5
+$as_echo "$ac_header_compiler" >&6; }
+
+# Is the header present?
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking $2 presence" >&5
+$as_echo_n "checking $2 presence... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <$2>
+_ACEOF
+if ac_fn_c_try_cpp "$LINENO"; then :
+  ac_header_preproc=yes
+else
+  ac_header_preproc=no
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_header_preproc" >&5
+$as_echo "$ac_header_preproc" >&6; }
+
+# So?  What about this header?
+case $ac_header_compiler:$ac_header_preproc:$ac_c_preproc_warn_flag in #((
+  yes:no: )
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: accepted by the compiler, rejected by the preprocessor!" >&5
+$as_echo "$as_me: WARNING: $2: accepted by the compiler, rejected by the preprocessor!" >&2;}
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: proceeding with the compiler's result" >&5
+$as_echo "$as_me: WARNING: $2: proceeding with the compiler's result" >&2;}
+    ;;
+  no:yes:* )
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: present but cannot be compiled" >&5
+$as_echo "$as_me: WARNING: $2: present but cannot be compiled" >&2;}
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2:     check for missing prerequisite headers?" >&5
+$as_echo "$as_me: WARNING: $2:     check for missing prerequisite headers?" >&2;}
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: see the Autoconf documentation" >&5
+$as_echo "$as_me: WARNING: $2: see the Autoconf documentation" >&2;}
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2:     section \"Present But Cannot Be Compiled\"" >&5
+$as_echo "$as_me: WARNING: $2:     section \"Present But Cannot Be Compiled\"" >&2;}
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: proceeding with the compiler's result" >&5
+$as_echo "$as_me: WARNING: $2: proceeding with the compiler's result" >&2;}
+( $as_echo "## ----------------------------------------- ##
+## Report this to libunwind-devel@nongnu.org ##
+## ----------------------------------------- ##"
+     ) | sed "s/^/$as_me: WARNING:     /" >&2
+    ;;
+esac
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
+$as_echo_n "checking for $2... " >&6; }
+if eval \${$3+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  eval "$3=\$ac_header_compiler"
+fi
+eval ac_res=\$$3
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+fi
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+
+} # ac_fn_c_check_header_mongrel
+
+# ac_fn_c_check_type LINENO TYPE VAR INCLUDES
+# -------------------------------------------
+# Tests whether TYPE exists after having included INCLUDES, setting cache
+# variable VAR accordingly.
+ac_fn_c_check_type ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
+$as_echo_n "checking for $2... " >&6; }
+if eval \${$3+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  eval "$3=no"
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+int
+main ()
+{
+if (sizeof ($2))
+	 return 0;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+int
+main ()
+{
+if (sizeof (($2)))
+	    return 0;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+
+else
+  eval "$3=yes"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+eval ac_res=\$$3
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+
+} # ac_fn_c_check_type
+
+# ac_fn_c_compute_int LINENO EXPR VAR INCLUDES
+# --------------------------------------------
+# Tries to find the compile-time value of EXPR in a program that includes
+# INCLUDES, setting VAR accordingly. Returns whether the value could be
+# computed
+ac_fn_c_compute_int ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  if test "$cross_compiling" = yes; then
+    # Depending upon the size, compute the lo and hi bounds.
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+int
+main ()
+{
+static int test_array [1 - 2 * !(($2) >= 0)];
+test_array [0] = 0;
+return test_array [0];
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_lo=0 ac_mid=0
+  while :; do
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+int
+main ()
+{
+static int test_array [1 - 2 * !(($2) <= $ac_mid)];
+test_array [0] = 0;
+return test_array [0];
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_hi=$ac_mid; break
+else
+  as_fn_arith $ac_mid + 1 && ac_lo=$as_val
+			if test $ac_lo -le $ac_mid; then
+			  ac_lo= ac_hi=
+			  break
+			fi
+			as_fn_arith 2 '*' $ac_mid + 1 && ac_mid=$as_val
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+  done
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+int
+main ()
+{
+static int test_array [1 - 2 * !(($2) < 0)];
+test_array [0] = 0;
+return test_array [0];
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_hi=-1 ac_mid=-1
+  while :; do
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+int
+main ()
+{
+static int test_array [1 - 2 * !(($2) >= $ac_mid)];
+test_array [0] = 0;
+return test_array [0];
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_lo=$ac_mid; break
+else
+  as_fn_arith '(' $ac_mid ')' - 1 && ac_hi=$as_val
+			if test $ac_mid -le $ac_hi; then
+			  ac_lo= ac_hi=
+			  break
+			fi
+			as_fn_arith 2 '*' $ac_mid && ac_mid=$as_val
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+  done
+else
+  ac_lo= ac_hi=
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+# Binary search between lo and hi bounds.
+while test "x$ac_lo" != "x$ac_hi"; do
+  as_fn_arith '(' $ac_hi - $ac_lo ')' / 2 + $ac_lo && ac_mid=$as_val
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+int
+main ()
+{
+static int test_array [1 - 2 * !(($2) <= $ac_mid)];
+test_array [0] = 0;
+return test_array [0];
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_hi=$ac_mid
+else
+  as_fn_arith '(' $ac_mid ')' + 1 && ac_lo=$as_val
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+done
+case $ac_lo in #((
+?*) eval "$3=\$ac_lo"; ac_retval=0 ;;
+'') ac_retval=1 ;;
+esac
+  else
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+static long int longval () { return $2; }
+static unsigned long int ulongval () { return $2; }
+#include <stdio.h>
+#include <stdlib.h>
+int
+main ()
+{
+
+  FILE *f = fopen ("conftest.val", "w");
+  if (! f)
+    return 1;
+  if (($2) < 0)
+    {
+      long int i = longval ();
+      if (i != ($2))
+	return 1;
+      fprintf (f, "%ld", i);
+    }
+  else
+    {
+      unsigned long int i = ulongval ();
+      if (i != ($2))
+	return 1;
+      fprintf (f, "%lu", i);
+    }
+  /* Do not output a trailing newline, as this causes \r\n confusion
+     on some platforms.  */
+  return ferror (f) || fclose (f) != 0;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"; then :
+  echo >>conftest.val; read $3 <conftest.val; ac_retval=0
+else
+  ac_retval=1
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+rm -f conftest.val
+
+  fi
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  as_fn_set_status $ac_retval
+
+} # ac_fn_c_compute_int
+
+# ac_fn_c_check_member LINENO AGGR MEMBER VAR INCLUDES
+# ----------------------------------------------------
+# Tries to find if the field MEMBER exists in type AGGR, after including
+# INCLUDES, setting cache variable VAR accordingly.
+ac_fn_c_check_member ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2.$3" >&5
+$as_echo_n "checking for $2.$3... " >&6; }
+if eval \${$4+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$5
+int
+main ()
+{
+static $2 ac_aggr;
+if (ac_aggr.$3)
+return 0;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  eval "$4=yes"
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$5
+int
+main ()
+{
+static $2 ac_aggr;
+if (sizeof ac_aggr.$3)
+return 0;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  eval "$4=yes"
+else
+  eval "$4=no"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+eval ac_res=\$$4
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+
+} # ac_fn_c_check_member
+
+# ac_fn_c_check_decl LINENO SYMBOL VAR INCLUDES
+# ---------------------------------------------
+# Tests whether SYMBOL is declared in INCLUDES, setting cache variable VAR
+# accordingly.
+ac_fn_c_check_decl ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  as_decl_name=`echo $2|sed 's/ *(.*//'`
+  as_decl_use=`echo $2|sed -e 's/(/((/' -e 's/)/) 0&/' -e 's/,/) 0& (/g'`
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $as_decl_name is declared" >&5
+$as_echo_n "checking whether $as_decl_name is declared... " >&6; }
+if eval \${$3+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+int
+main ()
+{
+#ifndef $as_decl_name
+#ifdef __cplusplus
+  (void) $as_decl_use;
+#else
+  (void) $as_decl_name;
+#endif
+#endif
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  eval "$3=yes"
+else
+  eval "$3=no"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+eval ac_res=\$$3
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+
+} # ac_fn_c_check_decl
+cat >config.log <<_ACEOF
+This file contains any messages produced by compilers while
+running configure, to aid debugging if configure makes a mistake.
+
+It was created by libunwind $as_me 1.4-rc1, which was
+generated by GNU Autoconf 2.69.  Invocation command line was
+
+  $ $0 $@
+
+_ACEOF
+exec 5>>config.log
+{
+cat <<_ASUNAME
+## --------- ##
+## Platform. ##
+## --------- ##
+
+hostname = `(hostname || uname -n) 2>/dev/null | sed 1q`
+uname -m = `(uname -m) 2>/dev/null || echo unknown`
+uname -r = `(uname -r) 2>/dev/null || echo unknown`
+uname -s = `(uname -s) 2>/dev/null || echo unknown`
+uname -v = `(uname -v) 2>/dev/null || echo unknown`
+
+/usr/bin/uname -p = `(/usr/bin/uname -p) 2>/dev/null || echo unknown`
+/bin/uname -X     = `(/bin/uname -X) 2>/dev/null     || echo unknown`
+
+/bin/arch              = `(/bin/arch) 2>/dev/null              || echo unknown`
+/usr/bin/arch -k       = `(/usr/bin/arch -k) 2>/dev/null       || echo unknown`
+/usr/convex/getsysinfo = `(/usr/convex/getsysinfo) 2>/dev/null || echo unknown`
+/usr/bin/hostinfo      = `(/usr/bin/hostinfo) 2>/dev/null      || echo unknown`
+/bin/machine           = `(/bin/machine) 2>/dev/null           || echo unknown`
+/usr/bin/oslevel       = `(/usr/bin/oslevel) 2>/dev/null       || echo unknown`
+/bin/universe          = `(/bin/universe) 2>/dev/null          || echo unknown`
+
+_ASUNAME
+
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    $as_echo "PATH: $as_dir"
+  done
+IFS=$as_save_IFS
+
+} >&5
+
+cat >&5 <<_ACEOF
+
+
+## ----------- ##
+## Core tests. ##
+## ----------- ##
+
+_ACEOF
+
+
+# Keep a trace of the command line.
+# Strip out --no-create and --no-recursion so they do not pile up.
+# Strip out --silent because we don't want to record it for future runs.
+# Also quote any args containing shell meta-characters.
+# Make two passes to allow for proper duplicate-argument suppression.
+ac_configure_args=
+ac_configure_args0=
+ac_configure_args1=
+ac_must_keep_next=false
+for ac_pass in 1 2
+do
+  for ac_arg
+  do
+    case $ac_arg in
+    -no-create | --no-c* | -n | -no-recursion | --no-r*) continue ;;
+    -q | -quiet | --quiet | --quie | --qui | --qu | --q \
+    | -silent | --silent | --silen | --sile | --sil)
+      continue ;;
+    *\'*)
+      ac_arg=`$as_echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
+    esac
+    case $ac_pass in
+    1) as_fn_append ac_configure_args0 " '$ac_arg'" ;;
+    2)
+      as_fn_append ac_configure_args1 " '$ac_arg'"
+      if test $ac_must_keep_next = true; then
+	ac_must_keep_next=false # Got value, back to normal.
+      else
+	case $ac_arg in
+	  *=* | --config-cache | -C | -disable-* | --disable-* \
+	  | -enable-* | --enable-* | -gas | --g* | -nfp | --nf* \
+	  | -q | -quiet | --q* | -silent | --sil* | -v | -verb* \
+	  | -with-* | --with-* | -without-* | --without-* | --x)
+	    case "$ac_configure_args0 " in
+	      "$ac_configure_args1"*" '$ac_arg' "* ) continue ;;
+	    esac
+	    ;;
+	  -* ) ac_must_keep_next=true ;;
+	esac
+      fi
+      as_fn_append ac_configure_args " '$ac_arg'"
+      ;;
+    esac
+  done
+done
+{ ac_configure_args0=; unset ac_configure_args0;}
+{ ac_configure_args1=; unset ac_configure_args1;}
+
+# When interrupted or exit'd, cleanup temporary files, and complete
+# config.log.  We remove comments because anyway the quotes in there
+# would cause problems or look ugly.
+# WARNING: Use '\'' to represent an apostrophe within the trap.
+# WARNING: Do not start the trap code with a newline, due to a FreeBSD 4.0 bug.
+trap 'exit_status=$?
+  # Save into config.log some information that might help in debugging.
+  {
+    echo
+
+    $as_echo "## ---------------- ##
+## Cache variables. ##
+## ---------------- ##"
+    echo
+    # The following way of writing the cache mishandles newlines in values,
+(
+  for ac_var in `(set) 2>&1 | sed -n '\''s/^\([a-zA-Z_][a-zA-Z0-9_]*\)=.*/\1/p'\''`; do
+    eval ac_val=\$$ac_var
+    case $ac_val in #(
+    *${as_nl}*)
+      case $ac_var in #(
+      *_cv_*) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: cache variable $ac_var contains a newline" >&5
+$as_echo "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;} ;;
+      esac
+      case $ac_var in #(
+      _ | IFS | as_nl) ;; #(
+      BASH_ARGV | BASH_SOURCE) eval $ac_var= ;; #(
+      *) { eval $ac_var=; unset $ac_var;} ;;
+      esac ;;
+    esac
+  done
+  (set) 2>&1 |
+    case $as_nl`(ac_space='\'' '\''; set) 2>&1` in #(
+    *${as_nl}ac_space=\ *)
+      sed -n \
+	"s/'\''/'\''\\\\'\'''\''/g;
+	  s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1='\''\\2'\''/p"
+      ;; #(
+    *)
+      sed -n "/^[_$as_cr_alnum]*_cv_[_$as_cr_alnum]*=/p"
+      ;;
+    esac |
+    sort
+)
+    echo
+
+    $as_echo "## ----------------- ##
+## Output variables. ##
+## ----------------- ##"
+    echo
+    for ac_var in $ac_subst_vars
+    do
+      eval ac_val=\$$ac_var
+      case $ac_val in
+      *\'\''*) ac_val=`$as_echo "$ac_val" | sed "s/'\''/'\''\\\\\\\\'\'''\''/g"`;;
+      esac
+      $as_echo "$ac_var='\''$ac_val'\''"
+    done | sort
+    echo
+
+    if test -n "$ac_subst_files"; then
+      $as_echo "## ------------------- ##
+## File substitutions. ##
+## ------------------- ##"
+      echo
+      for ac_var in $ac_subst_files
+      do
+	eval ac_val=\$$ac_var
+	case $ac_val in
+	*\'\''*) ac_val=`$as_echo "$ac_val" | sed "s/'\''/'\''\\\\\\\\'\'''\''/g"`;;
+	esac
+	$as_echo "$ac_var='\''$ac_val'\''"
+      done | sort
+      echo
+    fi
+
+    if test -s confdefs.h; then
+      $as_echo "## ----------- ##
+## confdefs.h. ##
+## ----------- ##"
+      echo
+      cat confdefs.h
+      echo
+    fi
+    test "$ac_signal" != 0 &&
+      $as_echo "$as_me: caught signal $ac_signal"
+    $as_echo "$as_me: exit $exit_status"
+  } >&5
+  rm -f core *.core core.conftest.* &&
+    rm -f -r conftest* confdefs* conf$$* $ac_clean_files &&
+    exit $exit_status
+' 0
+for ac_signal in 1 2 13 15; do
+  trap 'ac_signal='$ac_signal'; as_fn_exit 1' $ac_signal
+done
+ac_signal=0
+
+# confdefs.h avoids OS command line length limits that DEFS can exceed.
+rm -f -r conftest* confdefs.h
+
+$as_echo "/* confdefs.h */" > confdefs.h
+
+# Predefined preprocessor variables.
+
+cat >>confdefs.h <<_ACEOF
+#define PACKAGE_NAME "$PACKAGE_NAME"
+_ACEOF
+
+cat >>confdefs.h <<_ACEOF
+#define PACKAGE_TARNAME "$PACKAGE_TARNAME"
+_ACEOF
+
+cat >>confdefs.h <<_ACEOF
+#define PACKAGE_VERSION "$PACKAGE_VERSION"
+_ACEOF
+
+cat >>confdefs.h <<_ACEOF
+#define PACKAGE_STRING "$PACKAGE_STRING"
+_ACEOF
+
+cat >>confdefs.h <<_ACEOF
+#define PACKAGE_BUGREPORT "$PACKAGE_BUGREPORT"
+_ACEOF
+
+cat >>confdefs.h <<_ACEOF
+#define PACKAGE_URL "$PACKAGE_URL"
+_ACEOF
+
+
+# Let the site file select an alternate cache file if it wants to.
+# Prefer an explicitly selected file to automatically selected ones.
+ac_site_file1=NONE
+ac_site_file2=NONE
+if test -n "$CONFIG_SITE"; then
+  # We do not want a PATH search for config.site.
+  case $CONFIG_SITE in #((
+    -*)  ac_site_file1=./$CONFIG_SITE;;
+    */*) ac_site_file1=$CONFIG_SITE;;
+    *)   ac_site_file1=./$CONFIG_SITE;;
+  esac
+elif test "x$prefix" != xNONE; then
+  ac_site_file1=$prefix/share/config.site
+  ac_site_file2=$prefix/etc/config.site
+else
+  ac_site_file1=$ac_default_prefix/share/config.site
+  ac_site_file2=$ac_default_prefix/etc/config.site
+fi
+for ac_site_file in "$ac_site_file1" "$ac_site_file2"
+do
+  test "x$ac_site_file" = xNONE && continue
+  if test /dev/null != "$ac_site_file" && test -r "$ac_site_file"; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: loading site script $ac_site_file" >&5
+$as_echo "$as_me: loading site script $ac_site_file" >&6;}
+    sed 's/^/| /' "$ac_site_file" >&5
+    . "$ac_site_file" \
+      || { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "failed to load site script $ac_site_file
+See \`config.log' for more details" "$LINENO" 5; }
+  fi
+done
+
+if test -r "$cache_file"; then
+  # Some versions of bash will fail to source /dev/null (special files
+  # actually), so we avoid doing that.  DJGPP emulates it as a regular file.
+  if test /dev/null != "$cache_file" && test -f "$cache_file"; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: loading cache $cache_file" >&5
+$as_echo "$as_me: loading cache $cache_file" >&6;}
+    case $cache_file in
+      [\\/]* | ?:[\\/]* ) . "$cache_file";;
+      *)                      . "./$cache_file";;
+    esac
+  fi
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: creating cache $cache_file" >&5
+$as_echo "$as_me: creating cache $cache_file" >&6;}
+  >$cache_file
+fi
+
+# Check that the precious variables saved in the cache have kept the same
+# value.
+ac_cache_corrupted=false
+for ac_var in $ac_precious_vars; do
+  eval ac_old_set=\$ac_cv_env_${ac_var}_set
+  eval ac_new_set=\$ac_env_${ac_var}_set
+  eval ac_old_val=\$ac_cv_env_${ac_var}_value
+  eval ac_new_val=\$ac_env_${ac_var}_value
+  case $ac_old_set,$ac_new_set in
+    set,)
+      { $as_echo "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' was set to \`$ac_old_val' in the previous run" >&5
+$as_echo "$as_me: error: \`$ac_var' was set to \`$ac_old_val' in the previous run" >&2;}
+      ac_cache_corrupted=: ;;
+    ,set)
+      { $as_echo "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' was not set in the previous run" >&5
+$as_echo "$as_me: error: \`$ac_var' was not set in the previous run" >&2;}
+      ac_cache_corrupted=: ;;
+    ,);;
+    *)
+      if test "x$ac_old_val" != "x$ac_new_val"; then
+	# differences in whitespace do not lead to failure.
+	ac_old_val_w=`echo x $ac_old_val`
+	ac_new_val_w=`echo x $ac_new_val`
+	if test "$ac_old_val_w" != "$ac_new_val_w"; then
+	  { $as_echo "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' has changed since the previous run:" >&5
+$as_echo "$as_me: error: \`$ac_var' has changed since the previous run:" >&2;}
+	  ac_cache_corrupted=:
+	else
+	  { $as_echo "$as_me:${as_lineno-$LINENO}: warning: ignoring whitespace changes in \`$ac_var' since the previous run:" >&5
+$as_echo "$as_me: warning: ignoring whitespace changes in \`$ac_var' since the previous run:" >&2;}
+	  eval $ac_var=\$ac_old_val
+	fi
+	{ $as_echo "$as_me:${as_lineno-$LINENO}:   former value:  \`$ac_old_val'" >&5
+$as_echo "$as_me:   former value:  \`$ac_old_val'" >&2;}
+	{ $as_echo "$as_me:${as_lineno-$LINENO}:   current value: \`$ac_new_val'" >&5
+$as_echo "$as_me:   current value: \`$ac_new_val'" >&2;}
+      fi;;
+  esac
+  # Pass precious variables to config.status.
+  if test "$ac_new_set" = set; then
+    case $ac_new_val in
+    *\'*) ac_arg=$ac_var=`$as_echo "$ac_new_val" | sed "s/'/'\\\\\\\\''/g"` ;;
+    *) ac_arg=$ac_var=$ac_new_val ;;
+    esac
+    case " $ac_configure_args " in
+      *" '$ac_arg' "*) ;; # Avoid dups.  Use of quotes ensures accuracy.
+      *) as_fn_append ac_configure_args " '$ac_arg'" ;;
+    esac
+  fi
+done
+if $ac_cache_corrupted; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+  { $as_echo "$as_me:${as_lineno-$LINENO}: error: changes in the environment can compromise the build" >&5
+$as_echo "$as_me: error: changes in the environment can compromise the build" >&2;}
+  as_fn_error $? "run \`make distclean' and/or \`rm $cache_file' and start over" "$LINENO" 5
+fi
+## -------------------- ##
+## Main body of script. ##
+## -------------------- ##
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+
+ac_aux_dir=
+for ac_dir in config "$srcdir"/config; do
+  if test -f "$ac_dir/install-sh"; then
+    ac_aux_dir=$ac_dir
+    ac_install_sh="$ac_aux_dir/install-sh -c"
+    break
+  elif test -f "$ac_dir/install.sh"; then
+    ac_aux_dir=$ac_dir
+    ac_install_sh="$ac_aux_dir/install.sh -c"
+    break
+  elif test -f "$ac_dir/shtool"; then
+    ac_aux_dir=$ac_dir
+    ac_install_sh="$ac_aux_dir/shtool install -c"
+    break
+  fi
+done
+if test -z "$ac_aux_dir"; then
+  as_fn_error $? "cannot find install-sh, install.sh, or shtool in config \"$srcdir\"/config" "$LINENO" 5
+fi
+
+# These three variables are undocumented and unsupported,
+# and are intended to be withdrawn in a future Autoconf release.
+# They can cause serious problems if a builder's source tree is in a directory
+# whose full name contains unusual characters.
+ac_config_guess="$SHELL $ac_aux_dir/config.guess"  # Please don't use this var.
+ac_config_sub="$SHELL $ac_aux_dir/config.sub"  # Please don't use this var.
+ac_configure="$SHELL $ac_aux_dir/configure"  # Please don't use this var.
+
+
+# Make sure we can run config.sub.
+$SHELL "$ac_aux_dir/config.sub" sun4 >/dev/null 2>&1 ||
+  as_fn_error $? "cannot run $SHELL $ac_aux_dir/config.sub" "$LINENO" 5
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking build system type" >&5
+$as_echo_n "checking build system type... " >&6; }
+if ${ac_cv_build+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_build_alias=$build_alias
+test "x$ac_build_alias" = x &&
+  ac_build_alias=`$SHELL "$ac_aux_dir/config.guess"`
+test "x$ac_build_alias" = x &&
+  as_fn_error $? "cannot guess build type; you must specify one" "$LINENO" 5
+ac_cv_build=`$SHELL "$ac_aux_dir/config.sub" $ac_build_alias` ||
+  as_fn_error $? "$SHELL $ac_aux_dir/config.sub $ac_build_alias failed" "$LINENO" 5
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_build" >&5
+$as_echo "$ac_cv_build" >&6; }
+case $ac_cv_build in
+*-*-*) ;;
+*) as_fn_error $? "invalid value of canonical build" "$LINENO" 5;;
+esac
+build=$ac_cv_build
+ac_save_IFS=$IFS; IFS='-'
+set x $ac_cv_build
+shift
+build_cpu=$1
+build_vendor=$2
+shift; shift
+# Remember, the first character of IFS is used to create $*,
+# except with old shells:
+build_os=$*
+IFS=$ac_save_IFS
+case $build_os in *\ *) build_os=`echo "$build_os" | sed 's/ /-/g'`;; esac
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking host system type" >&5
+$as_echo_n "checking host system type... " >&6; }
+if ${ac_cv_host+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test "x$host_alias" = x; then
+  ac_cv_host=$ac_cv_build
+else
+  ac_cv_host=`$SHELL "$ac_aux_dir/config.sub" $host_alias` ||
+    as_fn_error $? "$SHELL $ac_aux_dir/config.sub $host_alias failed" "$LINENO" 5
+fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_host" >&5
+$as_echo "$ac_cv_host" >&6; }
+case $ac_cv_host in
+*-*-*) ;;
+*) as_fn_error $? "invalid value of canonical host" "$LINENO" 5;;
+esac
+host=$ac_cv_host
+ac_save_IFS=$IFS; IFS='-'
+set x $ac_cv_host
+shift
+host_cpu=$1
+host_vendor=$2
+shift; shift
+# Remember, the first character of IFS is used to create $*,
+# except with old shells:
+host_os=$*
+IFS=$ac_save_IFS
+case $host_os in *\ *) host_os=`echo "$host_os" | sed 's/ /-/g'`;; esac
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking target system type" >&5
+$as_echo_n "checking target system type... " >&6; }
+if ${ac_cv_target+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test "x$target_alias" = x; then
+  ac_cv_target=$ac_cv_host
+else
+  ac_cv_target=`$SHELL "$ac_aux_dir/config.sub" $target_alias` ||
+    as_fn_error $? "$SHELL $ac_aux_dir/config.sub $target_alias failed" "$LINENO" 5
+fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_target" >&5
+$as_echo "$ac_cv_target" >&6; }
+case $ac_cv_target in
+*-*-*) ;;
+*) as_fn_error $? "invalid value of canonical target" "$LINENO" 5;;
+esac
+target=$ac_cv_target
+ac_save_IFS=$IFS; IFS='-'
+set x $ac_cv_target
+shift
+target_cpu=$1
+target_vendor=$2
+shift; shift
+# Remember, the first character of IFS is used to create $*,
+# except with old shells:
+target_os=$*
+IFS=$ac_save_IFS
+case $target_os in *\ *) target_os=`echo "$target_os" | sed 's/ /-/g'`;; esac
+
+
+# The aliases save the names the user supplied, while $host etc.
+# will get canonicalized.
+test -n "$target_alias" &&
+  test "$program_prefix$program_suffix$program_transform_name" = \
+    NONENONEs,x,x, &&
+  program_prefix=${target_alias}-
+am__api_version='1.15'
+
+# Find a good install program.  We prefer a C program (faster),
+# so one script is as good as another.  But avoid the broken or
+# incompatible versions:
+# SysV /etc/install, /usr/sbin/install
+# SunOS /usr/etc/install
+# IRIX /sbin/install
+# AIX /bin/install
+# AmigaOS /C/install, which installs bootblocks on floppy discs
+# AIX 4 /usr/bin/installbsd, which doesn't work without a -g flag
+# AFS /usr/afsws/bin/install, which mishandles nonexistent args
+# SVR4 /usr/ucb/install, which tries to use the nonexistent group "staff"
+# OS/2's system install, which has a completely different semantic
+# ./install, which can be erroneously created by make from ./install.sh.
+# Reject install programs that cannot install multiple files.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for a BSD-compatible install" >&5
+$as_echo_n "checking for a BSD-compatible install... " >&6; }
+if test -z "$INSTALL"; then
+if ${ac_cv_path_install+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    # Account for people who put trailing slashes in PATH elements.
+case $as_dir/ in #((
+  ./ | .// | /[cC]/* | \
+  /etc/* | /usr/sbin/* | /usr/etc/* | /sbin/* | /usr/afsws/bin/* | \
+  ?:[\\/]os2[\\/]install[\\/]* | ?:[\\/]OS2[\\/]INSTALL[\\/]* | \
+  /usr/ucb/* ) ;;
+  *)
+    # OSF1 and SCO ODT 3.0 have their own names for install.
+    # Don't use installbsd from OSF since it installs stuff as root
+    # by default.
+    for ac_prog in ginstall scoinst install; do
+      for ac_exec_ext in '' $ac_executable_extensions; do
+	if as_fn_executable_p "$as_dir/$ac_prog$ac_exec_ext"; then
+	  if test $ac_prog = install &&
+	    grep dspmsg "$as_dir/$ac_prog$ac_exec_ext" >/dev/null 2>&1; then
+	    # AIX install.  It has an incompatible calling convention.
+	    :
+	  elif test $ac_prog = install &&
+	    grep pwplus "$as_dir/$ac_prog$ac_exec_ext" >/dev/null 2>&1; then
+	    # program-specific install script used by HP pwplus--don't use.
+	    :
+	  else
+	    rm -rf conftest.one conftest.two conftest.dir
+	    echo one > conftest.one
+	    echo two > conftest.two
+	    mkdir conftest.dir
+	    if "$as_dir/$ac_prog$ac_exec_ext" -c conftest.one conftest.two "`pwd`/conftest.dir" &&
+	      test -s conftest.one && test -s conftest.two &&
+	      test -s conftest.dir/conftest.one &&
+	      test -s conftest.dir/conftest.two
+	    then
+	      ac_cv_path_install="$as_dir/$ac_prog$ac_exec_ext -c"
+	      break 3
+	    fi
+	  fi
+	fi
+      done
+    done
+    ;;
+esac
+
+  done
+IFS=$as_save_IFS
+
+rm -rf conftest.one conftest.two conftest.dir
+
+fi
+  if test "${ac_cv_path_install+set}" = set; then
+    INSTALL=$ac_cv_path_install
+  else
+    # As a last resort, use the slow shell script.  Don't cache a
+    # value for INSTALL within a source directory, because that will
+    # break other packages using the cache if that directory is
+    # removed, or if the value is a relative name.
+    INSTALL=$ac_install_sh
+  fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $INSTALL" >&5
+$as_echo "$INSTALL" >&6; }
+
+# Use test -z because SunOS4 sh mishandles braces in ${var-val}.
+# It thinks the first close brace ends the variable substitution.
+test -z "$INSTALL_PROGRAM" && INSTALL_PROGRAM='${INSTALL}'
+
+test -z "$INSTALL_SCRIPT" && INSTALL_SCRIPT='${INSTALL}'
+
+test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL} -m 644'
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether build environment is sane" >&5
+$as_echo_n "checking whether build environment is sane... " >&6; }
+# Reject unsafe characters in $srcdir or the absolute working directory
+# name.  Accept space and tab only in the latter.
+am_lf='
+'
+case `pwd` in
+  *[\\\"\#\$\&\'\`$am_lf]*)
+    as_fn_error $? "unsafe absolute working directory name" "$LINENO" 5;;
+esac
+case $srcdir in
+  *[\\\"\#\$\&\'\`$am_lf\ \	]*)
+    as_fn_error $? "unsafe srcdir value: '$srcdir'" "$LINENO" 5;;
+esac
+
+# Do 'set' in a subshell so we don't clobber the current shell's
+# arguments.  Must try -L first in case configure is actually a
+# symlink; some systems play weird games with the mod time of symlinks
+# (eg FreeBSD returns the mod time of the symlink's containing
+# directory).
+if (
+   am_has_slept=no
+   for am_try in 1 2; do
+     echo "timestamp, slept: $am_has_slept" > conftest.file
+     set X `ls -Lt "$srcdir/configure" conftest.file 2> /dev/null`
+     if test "$*" = "X"; then
+	# -L didn't work.
+	set X `ls -t "$srcdir/configure" conftest.file`
+     fi
+     if test "$*" != "X $srcdir/configure conftest.file" \
+	&& test "$*" != "X conftest.file $srcdir/configure"; then
+
+	# If neither matched, then we have a broken ls.  This can happen
+	# if, for instance, CONFIG_SHELL is bash and it inherits a
+	# broken ls alias from the environment.  This has actually
+	# happened.  Such a system could not be considered "sane".
+	as_fn_error $? "ls -t appears to fail.  Make sure there is not a broken
+  alias in your environment" "$LINENO" 5
+     fi
+     if test "$2" = conftest.file || test $am_try -eq 2; then
+       break
+     fi
+     # Just in case.
+     sleep 1
+     am_has_slept=yes
+   done
+   test "$2" = conftest.file
+   )
+then
+   # Ok.
+   :
+else
+   as_fn_error $? "newly created file is older than distributed files!
+Check your system clock" "$LINENO" 5
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+# If we didn't sleep, we still need to ensure time stamps of config.status and
+# generated files are strictly newer.
+am_sleep_pid=
+if grep 'slept: no' conftest.file >/dev/null 2>&1; then
+  ( sleep 1 ) &
+  am_sleep_pid=$!
+fi
+
+rm -f conftest.file
+
+test "$program_prefix" != NONE &&
+  program_transform_name="s&^&$program_prefix&;$program_transform_name"
+# Use a double $ so make ignores it.
+test "$program_suffix" != NONE &&
+  program_transform_name="s&\$&$program_suffix&;$program_transform_name"
+# Double any \ or $.
+# By default was `s,x,x', remove it if useless.
+ac_script='s/[\\$]/&&/g;s/;s,x,x,$//'
+program_transform_name=`$as_echo "$program_transform_name" | sed "$ac_script"`
+
+# Expand $ac_aux_dir to an absolute path.
+am_aux_dir=`cd "$ac_aux_dir" && pwd`
+
+if test x"${MISSING+set}" != xset; then
+  case $am_aux_dir in
+  *\ * | *\	*)
+    MISSING="\${SHELL} \"$am_aux_dir/missing\"" ;;
+  *)
+    MISSING="\${SHELL} $am_aux_dir/missing" ;;
+  esac
+fi
+# Use eval to expand $SHELL
+if eval "$MISSING --is-lightweight"; then
+  am_missing_run="$MISSING "
+else
+  am_missing_run=
+  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: 'missing' script is too old or missing" >&5
+$as_echo "$as_me: WARNING: 'missing' script is too old or missing" >&2;}
+fi
+
+if test x"${install_sh+set}" != xset; then
+  case $am_aux_dir in
+  *\ * | *\	*)
+    install_sh="\${SHELL} '$am_aux_dir/install-sh'" ;;
+  *)
+    install_sh="\${SHELL} $am_aux_dir/install-sh"
+  esac
+fi
+
+# Installed binaries are usually stripped using 'strip' when the user
+# run "make install-strip".  However 'strip' might not be the right
+# tool to use in cross-compilation environments, therefore Automake
+# will honor the 'STRIP' environment variable to overrule this program.
+if test "$cross_compiling" != no; then
+  if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}strip", so it can be a program name with args.
+set dummy ${ac_tool_prefix}strip; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_STRIP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$STRIP"; then
+  ac_cv_prog_STRIP="$STRIP" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_STRIP="${ac_tool_prefix}strip"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+STRIP=$ac_cv_prog_STRIP
+if test -n "$STRIP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $STRIP" >&5
+$as_echo "$STRIP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_STRIP"; then
+  ac_ct_STRIP=$STRIP
+  # Extract the first word of "strip", so it can be a program name with args.
+set dummy strip; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_ac_ct_STRIP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_STRIP"; then
+  ac_cv_prog_ac_ct_STRIP="$ac_ct_STRIP" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_STRIP="strip"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_STRIP=$ac_cv_prog_ac_ct_STRIP
+if test -n "$ac_ct_STRIP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_STRIP" >&5
+$as_echo "$ac_ct_STRIP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_ct_STRIP" = x; then
+    STRIP=":"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    STRIP=$ac_ct_STRIP
+  fi
+else
+  STRIP="$ac_cv_prog_STRIP"
+fi
+
+fi
+INSTALL_STRIP_PROGRAM="\$(install_sh) -c -s"
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for a thread-safe mkdir -p" >&5
+$as_echo_n "checking for a thread-safe mkdir -p... " >&6; }
+if test -z "$MKDIR_P"; then
+  if ${ac_cv_path_mkdir+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH$PATH_SEPARATOR/opt/sfw/bin
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_prog in mkdir gmkdir; do
+	 for ac_exec_ext in '' $ac_executable_extensions; do
+	   as_fn_executable_p "$as_dir/$ac_prog$ac_exec_ext" || continue
+	   case `"$as_dir/$ac_prog$ac_exec_ext" --version 2>&1` in #(
+	     'mkdir (GNU coreutils) '* | \
+	     'mkdir (coreutils) '* | \
+	     'mkdir (fileutils) '4.1*)
+	       ac_cv_path_mkdir=$as_dir/$ac_prog$ac_exec_ext
+	       break 3;;
+	   esac
+	 done
+       done
+  done
+IFS=$as_save_IFS
+
+fi
+
+  test -d ./--version && rmdir ./--version
+  if test "${ac_cv_path_mkdir+set}" = set; then
+    MKDIR_P="$ac_cv_path_mkdir -p"
+  else
+    # As a last resort, use the slow shell script.  Don't cache a
+    # value for MKDIR_P within a source directory, because that will
+    # break other packages using the cache if that directory is
+    # removed, or if the value is a relative name.
+    MKDIR_P="$ac_install_sh -d"
+  fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $MKDIR_P" >&5
+$as_echo "$MKDIR_P" >&6; }
+
+for ac_prog in gawk mawk nawk awk
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_AWK+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$AWK"; then
+  ac_cv_prog_AWK="$AWK" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_AWK="$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+AWK=$ac_cv_prog_AWK
+if test -n "$AWK"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AWK" >&5
+$as_echo "$AWK" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$AWK" && break
+done
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ${MAKE-make} sets \$(MAKE)" >&5
+$as_echo_n "checking whether ${MAKE-make} sets \$(MAKE)... " >&6; }
+set x ${MAKE-make}
+ac_make=`$as_echo "$2" | sed 's/+/p/g; s/[^a-zA-Z0-9_]/_/g'`
+if eval \${ac_cv_prog_make_${ac_make}_set+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat >conftest.make <<\_ACEOF
+SHELL = /bin/sh
+all:
+	@echo '@@@%%%=$(MAKE)=@@@%%%'
+_ACEOF
+# GNU make sometimes prints "make[1]: Entering ...", which would confuse us.
+case `${MAKE-make} -f conftest.make 2>/dev/null` in
+  *@@@%%%=?*=@@@%%%*)
+    eval ac_cv_prog_make_${ac_make}_set=yes;;
+  *)
+    eval ac_cv_prog_make_${ac_make}_set=no;;
+esac
+rm -f conftest.make
+fi
+if eval test \$ac_cv_prog_make_${ac_make}_set = yes; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+  SET_MAKE=
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+  SET_MAKE="MAKE=${MAKE-make}"
+fi
+
+rm -rf .tst 2>/dev/null
+mkdir .tst 2>/dev/null
+if test -d .tst; then
+  am__leading_dot=.
+else
+  am__leading_dot=_
+fi
+rmdir .tst 2>/dev/null
+
+# Check whether --enable-silent-rules was given.
+if test "${enable_silent_rules+set}" = set; then :
+  enableval=$enable_silent_rules;
+fi
+
+case $enable_silent_rules in # (((
+  yes) AM_DEFAULT_VERBOSITY=0;;
+   no) AM_DEFAULT_VERBOSITY=1;;
+    *) AM_DEFAULT_VERBOSITY=1;;
+esac
+am_make=${MAKE-make}
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $am_make supports nested variables" >&5
+$as_echo_n "checking whether $am_make supports nested variables... " >&6; }
+if ${am_cv_make_support_nested_variables+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if $as_echo 'TRUE=$(BAR$(V))
+BAR0=false
+BAR1=true
+V=1
+am__doit:
+	@$(TRUE)
+.PHONY: am__doit' | $am_make -f - >/dev/null 2>&1; then
+  am_cv_make_support_nested_variables=yes
+else
+  am_cv_make_support_nested_variables=no
+fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $am_cv_make_support_nested_variables" >&5
+$as_echo "$am_cv_make_support_nested_variables" >&6; }
+if test $am_cv_make_support_nested_variables = yes; then
+    AM_V='$(V)'
+  AM_DEFAULT_V='$(AM_DEFAULT_VERBOSITY)'
+else
+  AM_V=$AM_DEFAULT_VERBOSITY
+  AM_DEFAULT_V=$AM_DEFAULT_VERBOSITY
+fi
+AM_BACKSLASH='\'
+
+if test "`cd $srcdir && pwd`" != "`pwd`"; then
+  # Use -I$(srcdir) only when $(srcdir) != ., so that make's output
+  # is not polluted with repeated "-I."
+  am__isrc=' -I$(srcdir)'
+  # test to see if srcdir already configured
+  if test -f $srcdir/config.status; then
+    as_fn_error $? "source directory already configured; run \"make distclean\" there first" "$LINENO" 5
+  fi
+fi
+
+# test whether we have cygpath
+if test -z "$CYGPATH_W"; then
+  if (cygpath --version) >/dev/null 2>/dev/null; then
+    CYGPATH_W='cygpath -w'
+  else
+    CYGPATH_W=echo
+  fi
+fi
+
+
+# Define the identity of the package.
+ PACKAGE='libunwind'
+ VERSION='1.4-rc1'
+
+
+cat >>confdefs.h <<_ACEOF
+#define PACKAGE "$PACKAGE"
+_ACEOF
+
+
+cat >>confdefs.h <<_ACEOF
+#define VERSION "$VERSION"
+_ACEOF
+
+# Some tools Automake needs.
+
+ACLOCAL=${ACLOCAL-"${am_missing_run}aclocal-${am__api_version}"}
+
+
+AUTOCONF=${AUTOCONF-"${am_missing_run}autoconf"}
+
+
+AUTOMAKE=${AUTOMAKE-"${am_missing_run}automake-${am__api_version}"}
+
+
+AUTOHEADER=${AUTOHEADER-"${am_missing_run}autoheader"}
+
+
+MAKEINFO=${MAKEINFO-"${am_missing_run}makeinfo"}
+
+# For better backward compatibility.  To be removed once Automake 1.9.x
+# dies out for good.  For more background, see:
+# <http://lists.gnu.org/archive/html/automake/2012-07/msg00001.html>
+# <http://lists.gnu.org/archive/html/automake/2012-07/msg00014.html>
+mkdir_p='$(MKDIR_P)'
+
+# We need awk for the "check" target (and possibly the TAP driver).  The
+# system "awk" is bad on some platforms.
+# Always define AMTAR for backward compatibility.  Yes, it's still used
+# in the wild :-(  We should find a proper way to deprecate it ...
+AMTAR='$${TAR-tar}'
+
+
+# We'll loop over all known methods to create a tar archive until one works.
+_am_tools='gnutar  pax cpio none'
+
+am__tar='$${TAR-tar} chof - "$$tardir"' am__untar='$${TAR-tar} xf -'
+
+
+
+
+
+
+# POSIX will say in a future version that running "rm -f" with no argument
+# is OK; and we want to be able to make that assumption in our Makefile
+# recipes.  So use an aggressive probe to check that the usage we want is
+# actually supported "in the wild" to an acceptable degree.
+# See automake bug#10828.
+# To make any issue more visible, cause the running configure to be aborted
+# by default if the 'rm' program in use doesn't match our expectations; the
+# user can still override this though.
+if rm -f && rm -fr && rm -rf; then : OK; else
+  cat >&2 <<'END'
+Oops!
+
+Your 'rm' program seems unable to run without file operands specified
+on the command line, even when the '-f' option is present.  This is contrary
+to the behaviour of most rm programs out there, and not conforming with
+the upcoming POSIX standard: <http://austingroupbugs.net/view.php?id=542>
+
+Please tell bug-automake@gnu.org about your system, including the value
+of your $PATH and any error possibly output before this message.  This
+can help us improve future automake versions.
+
+END
+  if test x"$ACCEPT_INFERIOR_RM_PROGRAM" = x"yes"; then
+    echo 'Configuration will proceed anyway, since you have set the' >&2
+    echo 'ACCEPT_INFERIOR_RM_PROGRAM variable to "yes"' >&2
+    echo >&2
+  else
+    cat >&2 <<'END'
+Aborting the configuration process, to ensure you take notice of the issue.
+
+You can download and install GNU coreutils to get an 'rm' implementation
+that behaves properly: <http://www.gnu.org/software/coreutils/>.
+
+If you want to complete the configuration process using your problematic
+'rm' anyway, export the environment variable ACCEPT_INFERIOR_RM_PROGRAM
+to "yes", and re-run configure.
+
+END
+    as_fn_error $? "Your 'rm' program is bad, sorry." "$LINENO" 5
+  fi
+fi
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to enable maintainer-specific portions of Makefiles" >&5
+$as_echo_n "checking whether to enable maintainer-specific portions of Makefiles... " >&6; }
+    # Check whether --enable-maintainer-mode was given.
+if test "${enable_maintainer_mode+set}" = set; then :
+  enableval=$enable_maintainer_mode; USE_MAINTAINER_MODE=$enableval
+else
+  USE_MAINTAINER_MODE=no
+fi
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $USE_MAINTAINER_MODE" >&5
+$as_echo "$USE_MAINTAINER_MODE" >&6; }
+   if test $USE_MAINTAINER_MODE = yes; then
+  MAINTAINER_MODE_TRUE=
+  MAINTAINER_MODE_FALSE='#'
+else
+  MAINTAINER_MODE_TRUE='#'
+  MAINTAINER_MODE_FALSE=
+fi
+
+  MAINT=$MAINTAINER_MODE_TRUE
+
+
+ac_config_headers="$ac_config_headers include/config.h"
+
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}gcc", so it can be a program name with args.
+set dummy ${ac_tool_prefix}gcc; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_CC+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_CC="${ac_tool_prefix}gcc"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+$as_echo "$CC" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_CC"; then
+  ac_ct_CC=$CC
+  # Extract the first word of "gcc", so it can be a program name with args.
+set dummy gcc; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_ac_ct_CC+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_CC"; then
+  ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_CC="gcc"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_CC=$ac_cv_prog_ac_ct_CC
+if test -n "$ac_ct_CC"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
+$as_echo "$ac_ct_CC" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_ct_CC" = x; then
+    CC=""
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    CC=$ac_ct_CC
+  fi
+else
+  CC="$ac_cv_prog_CC"
+fi
+
+if test -z "$CC"; then
+          if test -n "$ac_tool_prefix"; then
+    # Extract the first word of "${ac_tool_prefix}cc", so it can be a program name with args.
+set dummy ${ac_tool_prefix}cc; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_CC+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_CC="${ac_tool_prefix}cc"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+$as_echo "$CC" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  fi
+fi
+if test -z "$CC"; then
+  # Extract the first word of "cc", so it can be a program name with args.
+set dummy cc; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_CC+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+  ac_prog_rejected=no
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    if test "$as_dir/$ac_word$ac_exec_ext" = "/usr/ucb/cc"; then
+       ac_prog_rejected=yes
+       continue
+     fi
+    ac_cv_prog_CC="cc"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+if test $ac_prog_rejected = yes; then
+  # We found a bogon in the path, so make sure we never use it.
+  set dummy $ac_cv_prog_CC
+  shift
+  if test $# != 0; then
+    # We chose a different compiler from the bogus one.
+    # However, it has the same basename, so the bogon will be chosen
+    # first if we set CC to just the basename; use the full file name.
+    shift
+    ac_cv_prog_CC="$as_dir/$ac_word${1+' '}$@"
+  fi
+fi
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+$as_echo "$CC" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$CC"; then
+  if test -n "$ac_tool_prefix"; then
+  for ac_prog in cl.exe
+  do
+    # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
+set dummy $ac_tool_prefix$ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_CC+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_CC="$ac_tool_prefix$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+$as_echo "$CC" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+    test -n "$CC" && break
+  done
+fi
+if test -z "$CC"; then
+  ac_ct_CC=$CC
+  for ac_prog in cl.exe
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_ac_ct_CC+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_CC"; then
+  ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_CC="$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_CC=$ac_cv_prog_ac_ct_CC
+if test -n "$ac_ct_CC"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
+$as_echo "$ac_ct_CC" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$ac_ct_CC" && break
+done
+
+  if test "x$ac_ct_CC" = x; then
+    CC=""
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    CC=$ac_ct_CC
+  fi
+fi
+
+fi
+
+
+test -z "$CC" && { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "no acceptable C compiler found in \$PATH
+See \`config.log' for more details" "$LINENO" 5; }
+
+# Provide some information about the compiler.
+$as_echo "$as_me:${as_lineno-$LINENO}: checking for C compiler version" >&5
+set X $ac_compile
+ac_compiler=$2
+for ac_option in --version -v -V -qversion; do
+  { { ac_try="$ac_compiler $ac_option >&5"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_compiler $ac_option >&5") 2>conftest.err
+  ac_status=$?
+  if test -s conftest.err; then
+    sed '10a\
+... rest of stderr output deleted ...
+         10q' conftest.err >conftest.er1
+    cat conftest.er1 >&5
+  fi
+  rm -f conftest.er1 conftest.err
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+done
+
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+ac_clean_files_save=$ac_clean_files
+ac_clean_files="$ac_clean_files a.out a.out.dSYM a.exe b.out"
+# Try to create an executable without -o first, disregard a.out.
+# It will help us diagnose broken compilers, and finding out an intuition
+# of exeext.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the C compiler works" >&5
+$as_echo_n "checking whether the C compiler works... " >&6; }
+ac_link_default=`$as_echo "$ac_link" | sed 's/ -o *conftest[^ ]*//'`
+
+# The possible output files:
+ac_files="a.out conftest.exe conftest a.exe a_out.exe b.out conftest.*"
+
+ac_rmfiles=
+for ac_file in $ac_files
+do
+  case $ac_file in
+    *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.map | *.inf | *.dSYM | *.o | *.obj ) ;;
+    * ) ac_rmfiles="$ac_rmfiles $ac_file";;
+  esac
+done
+rm -f $ac_rmfiles
+
+if { { ac_try="$ac_link_default"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_link_default") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then :
+  # Autoconf-2.13 could set the ac_cv_exeext variable to `no'.
+# So ignore a value of `no', otherwise this would lead to `EXEEXT = no'
+# in a Makefile.  We should not override ac_cv_exeext if it was cached,
+# so that the user can short-circuit this test for compilers unknown to
+# Autoconf.
+for ac_file in $ac_files ''
+do
+  test -f "$ac_file" || continue
+  case $ac_file in
+    *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.map | *.inf | *.dSYM | *.o | *.obj )
+	;;
+    [ab].out )
+	# We found the default executable, but exeext='' is most
+	# certainly right.
+	break;;
+    *.* )
+	if test "${ac_cv_exeext+set}" = set && test "$ac_cv_exeext" != no;
+	then :; else
+	   ac_cv_exeext=`expr "$ac_file" : '[^.]*\(\..*\)'`
+	fi
+	# We set ac_cv_exeext here because the later test for it is not
+	# safe: cross compilers may not add the suffix if given an `-o'
+	# argument, so we may need to know it at that point already.
+	# Even if this section looks crufty: it has the advantage of
+	# actually working.
+	break;;
+    * )
+	break;;
+  esac
+done
+test "$ac_cv_exeext" = no && ac_cv_exeext=
+
+else
+  ac_file=''
+fi
+if test -z "$ac_file"; then :
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+$as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error 77 "C compiler cannot create executables
+See \`config.log' for more details" "$LINENO" 5; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for C compiler default output file name" >&5
+$as_echo_n "checking for C compiler default output file name... " >&6; }
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_file" >&5
+$as_echo "$ac_file" >&6; }
+ac_exeext=$ac_cv_exeext
+
+rm -f -r a.out a.out.dSYM a.exe conftest$ac_cv_exeext b.out
+ac_clean_files=$ac_clean_files_save
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for suffix of executables" >&5
+$as_echo_n "checking for suffix of executables... " >&6; }
+if { { ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_link") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then :
+  # If both `conftest.exe' and `conftest' are `present' (well, observable)
+# catch `conftest.exe'.  For instance with Cygwin, `ls conftest' will
+# work properly (i.e., refer to `conftest.exe'), while it won't with
+# `rm'.
+for ac_file in conftest.exe conftest conftest.*; do
+  test -f "$ac_file" || continue
+  case $ac_file in
+    *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.map | *.inf | *.dSYM | *.o | *.obj ) ;;
+    *.* ) ac_cv_exeext=`expr "$ac_file" : '[^.]*\(\..*\)'`
+	  break;;
+    * ) break;;
+  esac
+done
+else
+  { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "cannot compute suffix of executables: cannot compile and link
+See \`config.log' for more details" "$LINENO" 5; }
+fi
+rm -f conftest conftest$ac_cv_exeext
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_exeext" >&5
+$as_echo "$ac_cv_exeext" >&6; }
+
+rm -f conftest.$ac_ext
+EXEEXT=$ac_cv_exeext
+ac_exeext=$EXEEXT
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdio.h>
+int
+main ()
+{
+FILE *f = fopen ("conftest.out", "w");
+ return ferror (f) || fclose (f) != 0;
+
+  ;
+  return 0;
+}
+_ACEOF
+ac_clean_files="$ac_clean_files conftest.out"
+# Check that the compiler produces executables we can run.  If not, either
+# the compiler is broken, or we cross compile.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we are cross compiling" >&5
+$as_echo_n "checking whether we are cross compiling... " >&6; }
+if test "$cross_compiling" != yes; then
+  { { ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_link") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+  if { ac_try='./conftest$ac_cv_exeext'
+  { { case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_try") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }; then
+    cross_compiling=no
+  else
+    if test "$cross_compiling" = maybe; then
+	cross_compiling=yes
+    else
+	{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "cannot run C compiled programs.
+If you meant to cross compile, use \`--host'.
+See \`config.log' for more details" "$LINENO" 5; }
+    fi
+  fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $cross_compiling" >&5
+$as_echo "$cross_compiling" >&6; }
+
+rm -f conftest.$ac_ext conftest$ac_cv_exeext conftest.out
+ac_clean_files=$ac_clean_files_save
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for suffix of object files" >&5
+$as_echo_n "checking for suffix of object files... " >&6; }
+if ${ac_cv_objext+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.o conftest.obj
+if { { ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_compile") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then :
+  for ac_file in conftest.o conftest.obj conftest.*; do
+  test -f "$ac_file" || continue;
+  case $ac_file in
+    *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.map | *.inf | *.dSYM ) ;;
+    *) ac_cv_objext=`expr "$ac_file" : '.*\.\(.*\)'`
+       break;;
+  esac
+done
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "cannot compute suffix of object files: cannot compile
+See \`config.log' for more details" "$LINENO" 5; }
+fi
+rm -f conftest.$ac_cv_objext conftest.$ac_ext
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_objext" >&5
+$as_echo "$ac_cv_objext" >&6; }
+OBJEXT=$ac_cv_objext
+ac_objext=$OBJEXT
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we are using the GNU C compiler" >&5
+$as_echo_n "checking whether we are using the GNU C compiler... " >&6; }
+if ${ac_cv_c_compiler_gnu+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+#ifndef __GNUC__
+       choke me
+#endif
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_compiler_gnu=yes
+else
+  ac_compiler_gnu=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ac_cv_c_compiler_gnu=$ac_compiler_gnu
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_compiler_gnu" >&5
+$as_echo "$ac_cv_c_compiler_gnu" >&6; }
+if test $ac_compiler_gnu = yes; then
+  GCC=yes
+else
+  GCC=
+fi
+ac_test_CFLAGS=${CFLAGS+set}
+ac_save_CFLAGS=$CFLAGS
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC accepts -g" >&5
+$as_echo_n "checking whether $CC accepts -g... " >&6; }
+if ${ac_cv_prog_cc_g+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_save_c_werror_flag=$ac_c_werror_flag
+   ac_c_werror_flag=yes
+   ac_cv_prog_cc_g=no
+   CFLAGS="-g"
+   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_prog_cc_g=yes
+else
+  CFLAGS=""
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+
+else
+  ac_c_werror_flag=$ac_save_c_werror_flag
+	 CFLAGS="-g"
+	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_prog_cc_g=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+   ac_c_werror_flag=$ac_save_c_werror_flag
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_g" >&5
+$as_echo "$ac_cv_prog_cc_g" >&6; }
+if test "$ac_test_CFLAGS" = set; then
+  CFLAGS=$ac_save_CFLAGS
+elif test $ac_cv_prog_cc_g = yes; then
+  if test "$GCC" = yes; then
+    CFLAGS="-g -O2"
+  else
+    CFLAGS="-g"
+  fi
+else
+  if test "$GCC" = yes; then
+    CFLAGS="-O2"
+  else
+    CFLAGS=
+  fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $CC option to accept ISO C89" >&5
+$as_echo_n "checking for $CC option to accept ISO C89... " >&6; }
+if ${ac_cv_prog_cc_c89+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_cv_prog_cc_c89=no
+ac_save_CC=$CC
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdarg.h>
+#include <stdio.h>
+struct stat;
+/* Most of the following tests are stolen from RCS 5.7's src/conf.sh.  */
+struct buf { int x; };
+FILE * (*rcsopen) (struct buf *, struct stat *, int);
+static char *e (p, i)
+     char **p;
+     int i;
+{
+  return p[i];
+}
+static char *f (char * (*g) (char **, int), char **p, ...)
+{
+  char *s;
+  va_list v;
+  va_start (v,p);
+  s = g (p, va_arg (v,int));
+  va_end (v);
+  return s;
+}
+
+/* OSF 4.0 Compaq cc is some sort of almost-ANSI by default.  It has
+   function prototypes and stuff, but not '\xHH' hex character constants.
+   These don't provoke an error unfortunately, instead are silently treated
+   as 'x'.  The following induces an error, until -std is added to get
+   proper ANSI mode.  Curiously '\x00'!='x' always comes out true, for an
+   array size at least.  It's necessary to write '\x00'==0 to get something
+   that's true only with -std.  */
+int osf4_cc_array ['\x00' == 0 ? 1 : -1];
+
+/* IBM C 6 for AIX is almost-ANSI by default, but it replaces macro parameters
+   inside strings and character constants.  */
+#define FOO(x) 'x'
+int xlc6_cc_array[FOO(a) == 'x' ? 1 : -1];
+
+int test (int i, double x);
+struct s1 {int (*f) (int a);};
+struct s2 {int (*f) (double a);};
+int pairnames (int, char **, FILE *(*)(struct buf *, struct stat *, int), int, int);
+int argc;
+char **argv;
+int
+main ()
+{
+return f (e, argv, 0) != argv[0]  ||  f (e, argv, 1) != argv[1];
+  ;
+  return 0;
+}
+_ACEOF
+for ac_arg in '' -qlanglvl=extc89 -qlanglvl=ansi -std \
+	-Ae "-Aa -D_HPUX_SOURCE" "-Xc -D__EXTENSIONS__"
+do
+  CC="$ac_save_CC $ac_arg"
+  if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_prog_cc_c89=$ac_arg
+fi
+rm -f core conftest.err conftest.$ac_objext
+  test "x$ac_cv_prog_cc_c89" != "xno" && break
+done
+rm -f conftest.$ac_ext
+CC=$ac_save_CC
+
+fi
+# AC_CACHE_VAL
+case "x$ac_cv_prog_cc_c89" in
+  x)
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
+$as_echo "none needed" >&6; } ;;
+  xno)
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
+$as_echo "unsupported" >&6; } ;;
+  *)
+    CC="$CC $ac_cv_prog_cc_c89"
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c89" >&5
+$as_echo "$ac_cv_prog_cc_c89" >&6; } ;;
+esac
+if test "x$ac_cv_prog_cc_c89" != xno; then :
+
+fi
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC understands -c and -o together" >&5
+$as_echo_n "checking whether $CC understands -c and -o together... " >&6; }
+if ${am_cv_prog_cc_c_o+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+  # Make sure it works both with $CC and with simple cc.
+  # Following AC_PROG_CC_C_O, we do the test twice because some
+  # compilers refuse to overwrite an existing .o file with -o,
+  # though they will create one.
+  am_cv_prog_cc_c_o=yes
+  for am_i in 1 2; do
+    if { echo "$as_me:$LINENO: $CC -c conftest.$ac_ext -o conftest2.$ac_objext" >&5
+   ($CC -c conftest.$ac_ext -o conftest2.$ac_objext) >&5 2>&5
+   ac_status=$?
+   echo "$as_me:$LINENO: \$? = $ac_status" >&5
+   (exit $ac_status); } \
+         && test -f conftest2.$ac_objext; then
+      : OK
+    else
+      am_cv_prog_cc_c_o=no
+      break
+    fi
+  done
+  rm -f core conftest*
+  unset am_i
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $am_cv_prog_cc_c_o" >&5
+$as_echo "$am_cv_prog_cc_c_o" >&6; }
+if test "$am_cv_prog_cc_c_o" != yes; then
+   # Losing compiler, so override with the script.
+   # FIXME: It is wrong to rewrite CC.
+   # But if we don't then we get into trouble of one sort or another.
+   # A longer-term fix would be to have automake use am__CC in this case,
+   # and then we could set am__CC="\$(top_srcdir)/compile \$(CC)"
+   CC="$am_aux_dir/compile $CC"
+fi
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+DEPDIR="${am__leading_dot}deps"
+
+ac_config_commands="$ac_config_commands depfiles"
+
+
+am_make=${MAKE-make}
+cat > confinc << 'END'
+am__doit:
+	@echo this is the am__doit target
+.PHONY: am__doit
+END
+# If we don't find an include directive, just comment out the code.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for style of include used by $am_make" >&5
+$as_echo_n "checking for style of include used by $am_make... " >&6; }
+am__include="#"
+am__quote=
+_am_result=none
+# First try GNU make style include.
+echo "include confinc" > confmf
+# Ignore all kinds of additional output from 'make'.
+case `$am_make -s -f confmf 2> /dev/null` in #(
+*the\ am__doit\ target*)
+  am__include=include
+  am__quote=
+  _am_result=GNU
+  ;;
+esac
+# Now try BSD make style include.
+if test "$am__include" = "#"; then
+   echo '.include "confinc"' > confmf
+   case `$am_make -s -f confmf 2> /dev/null` in #(
+   *the\ am__doit\ target*)
+     am__include=.include
+     am__quote="\""
+     _am_result=BSD
+     ;;
+   esac
+fi
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $_am_result" >&5
+$as_echo "$_am_result" >&6; }
+rm -f confinc confmf
+
+# Check whether --enable-dependency-tracking was given.
+if test "${enable_dependency_tracking+set}" = set; then :
+  enableval=$enable_dependency_tracking;
+fi
+
+if test "x$enable_dependency_tracking" != xno; then
+  am_depcomp="$ac_aux_dir/depcomp"
+  AMDEPBACKSLASH='\'
+  am__nodep='_no'
+fi
+ if test "x$enable_dependency_tracking" != xno; then
+  AMDEP_TRUE=
+  AMDEP_FALSE='#'
+else
+  AMDEP_TRUE='#'
+  AMDEP_FALSE=
+fi
+
+
+
+depcc="$CC"   am_compiler_list=
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking dependency style of $depcc" >&5
+$as_echo_n "checking dependency style of $depcc... " >&6; }
+if ${am_cv_CC_dependencies_compiler_type+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -z "$AMDEP_TRUE" && test -f "$am_depcomp"; then
+  # We make a subdir and do the tests there.  Otherwise we can end up
+  # making bogus files that we don't know about and never remove.  For
+  # instance it was reported that on HP-UX the gcc test will end up
+  # making a dummy file named 'D' -- because '-MD' means "put the output
+  # in D".
+  rm -rf conftest.dir
+  mkdir conftest.dir
+  # Copy depcomp to subdir because otherwise we won't find it if we're
+  # using a relative directory.
+  cp "$am_depcomp" conftest.dir
+  cd conftest.dir
+  # We will build objects and dependencies in a subdirectory because
+  # it helps to detect inapplicable dependency modes.  For instance
+  # both Tru64's cc and ICC support -MD to output dependencies as a
+  # side effect of compilation, but ICC will put the dependencies in
+  # the current directory while Tru64 will put them in the object
+  # directory.
+  mkdir sub
+
+  am_cv_CC_dependencies_compiler_type=none
+  if test "$am_compiler_list" = ""; then
+     am_compiler_list=`sed -n 's/^#*\([a-zA-Z0-9]*\))$/\1/p' < ./depcomp`
+  fi
+  am__universal=false
+  case " $depcc " in #(
+     *\ -arch\ *\ -arch\ *) am__universal=true ;;
+     esac
+
+  for depmode in $am_compiler_list; do
+    # Setup a source with many dependencies, because some compilers
+    # like to wrap large dependency lists on column 80 (with \), and
+    # we should not choose a depcomp mode which is confused by this.
+    #
+    # We need to recreate these files for each test, as the compiler may
+    # overwrite some of them when testing with obscure command lines.
+    # This happens at least with the AIX C compiler.
+    : > sub/conftest.c
+    for i in 1 2 3 4 5 6; do
+      echo '#include "conftst'$i'.h"' >> sub/conftest.c
+      # Using ": > sub/conftst$i.h" creates only sub/conftst1.h with
+      # Solaris 10 /bin/sh.
+      echo '/* dummy */' > sub/conftst$i.h
+    done
+    echo "${am__include} ${am__quote}sub/conftest.Po${am__quote}" > confmf
+
+    # We check with '-c' and '-o' for the sake of the "dashmstdout"
+    # mode.  It turns out that the SunPro C++ compiler does not properly
+    # handle '-M -o', and we need to detect this.  Also, some Intel
+    # versions had trouble with output in subdirs.
+    am__obj=sub/conftest.${OBJEXT-o}
+    am__minus_obj="-o $am__obj"
+    case $depmode in
+    gcc)
+      # This depmode causes a compiler race in universal mode.
+      test "$am__universal" = false || continue
+      ;;
+    nosideeffect)
+      # After this tag, mechanisms are not by side-effect, so they'll
+      # only be used when explicitly requested.
+      if test "x$enable_dependency_tracking" = xyes; then
+	continue
+      else
+	break
+      fi
+      ;;
+    msvc7 | msvc7msys | msvisualcpp | msvcmsys)
+      # This compiler won't grok '-c -o', but also, the minuso test has
+      # not run yet.  These depmodes are late enough in the game, and
+      # so weak that their functioning should not be impacted.
+      am__obj=conftest.${OBJEXT-o}
+      am__minus_obj=
+      ;;
+    none) break ;;
+    esac
+    if depmode=$depmode \
+       source=sub/conftest.c object=$am__obj \
+       depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo \
+       $SHELL ./depcomp $depcc -c $am__minus_obj sub/conftest.c \
+         >/dev/null 2>conftest.err &&
+       grep sub/conftst1.h sub/conftest.Po > /dev/null 2>&1 &&
+       grep sub/conftst6.h sub/conftest.Po > /dev/null 2>&1 &&
+       grep $am__obj sub/conftest.Po > /dev/null 2>&1 &&
+       ${MAKE-make} -s -f confmf > /dev/null 2>&1; then
+      # icc doesn't choke on unknown options, it will just issue warnings
+      # or remarks (even with -Werror).  So we grep stderr for any message
+      # that says an option was ignored or not supported.
+      # When given -MP, icc 7.0 and 7.1 complain thusly:
+      #   icc: Command line warning: ignoring option '-M'; no argument required
+      # The diagnosis changed in icc 8.0:
+      #   icc: Command line remark: option '-MP' not supported
+      if (grep 'ignoring option' conftest.err ||
+          grep 'not supported' conftest.err) >/dev/null 2>&1; then :; else
+        am_cv_CC_dependencies_compiler_type=$depmode
+        break
+      fi
+    fi
+  done
+
+  cd ..
+  rm -rf conftest.dir
+else
+  am_cv_CC_dependencies_compiler_type=none
+fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $am_cv_CC_dependencies_compiler_type" >&5
+$as_echo "$am_cv_CC_dependencies_compiler_type" >&6; }
+CCDEPMODE=depmode=$am_cv_CC_dependencies_compiler_type
+
+ if
+  test "x$enable_dependency_tracking" != xno \
+  && test "$am_cv_CC_dependencies_compiler_type" = gcc3; then
+  am__fastdepCC_TRUE=
+  am__fastdepCC_FALSE='#'
+else
+  am__fastdepCC_TRUE='#'
+  am__fastdepCC_FALSE=
+fi
+
+
+ac_ext=cpp
+ac_cpp='$CXXCPP $CPPFLAGS'
+ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
+if test -z "$CXX"; then
+  if test -n "$CCC"; then
+    CXX=$CCC
+  else
+    if test -n "$ac_tool_prefix"; then
+  for ac_prog in g++ c++ gpp aCC CC cxx cc++ cl.exe FCC KCC RCC xlC_r xlC
+  do
+    # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
+set dummy $ac_tool_prefix$ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_CXX+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$CXX"; then
+  ac_cv_prog_CXX="$CXX" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_CXX="$ac_tool_prefix$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+CXX=$ac_cv_prog_CXX
+if test -n "$CXX"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CXX" >&5
+$as_echo "$CXX" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+    test -n "$CXX" && break
+  done
+fi
+if test -z "$CXX"; then
+  ac_ct_CXX=$CXX
+  for ac_prog in g++ c++ gpp aCC CC cxx cc++ cl.exe FCC KCC RCC xlC_r xlC
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_ac_ct_CXX+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_CXX"; then
+  ac_cv_prog_ac_ct_CXX="$ac_ct_CXX" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_CXX="$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_CXX=$ac_cv_prog_ac_ct_CXX
+if test -n "$ac_ct_CXX"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CXX" >&5
+$as_echo "$ac_ct_CXX" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$ac_ct_CXX" && break
+done
+
+  if test "x$ac_ct_CXX" = x; then
+    CXX="g++"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    CXX=$ac_ct_CXX
+  fi
+fi
+
+  fi
+fi
+# Provide some information about the compiler.
+$as_echo "$as_me:${as_lineno-$LINENO}: checking for C++ compiler version" >&5
+set X $ac_compile
+ac_compiler=$2
+for ac_option in --version -v -V -qversion; do
+  { { ac_try="$ac_compiler $ac_option >&5"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_compiler $ac_option >&5") 2>conftest.err
+  ac_status=$?
+  if test -s conftest.err; then
+    sed '10a\
+... rest of stderr output deleted ...
+         10q' conftest.err >conftest.er1
+    cat conftest.er1 >&5
+  fi
+  rm -f conftest.er1 conftest.err
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+done
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we are using the GNU C++ compiler" >&5
+$as_echo_n "checking whether we are using the GNU C++ compiler... " >&6; }
+if ${ac_cv_cxx_compiler_gnu+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+#ifndef __GNUC__
+       choke me
+#endif
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_cxx_try_compile "$LINENO"; then :
+  ac_compiler_gnu=yes
+else
+  ac_compiler_gnu=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ac_cv_cxx_compiler_gnu=$ac_compiler_gnu
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_cxx_compiler_gnu" >&5
+$as_echo "$ac_cv_cxx_compiler_gnu" >&6; }
+if test $ac_compiler_gnu = yes; then
+  GXX=yes
+else
+  GXX=
+fi
+ac_test_CXXFLAGS=${CXXFLAGS+set}
+ac_save_CXXFLAGS=$CXXFLAGS
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CXX accepts -g" >&5
+$as_echo_n "checking whether $CXX accepts -g... " >&6; }
+if ${ac_cv_prog_cxx_g+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_save_cxx_werror_flag=$ac_cxx_werror_flag
+   ac_cxx_werror_flag=yes
+   ac_cv_prog_cxx_g=no
+   CXXFLAGS="-g"
+   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_cxx_try_compile "$LINENO"; then :
+  ac_cv_prog_cxx_g=yes
+else
+  CXXFLAGS=""
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_cxx_try_compile "$LINENO"; then :
+
+else
+  ac_cxx_werror_flag=$ac_save_cxx_werror_flag
+	 CXXFLAGS="-g"
+	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_cxx_try_compile "$LINENO"; then :
+  ac_cv_prog_cxx_g=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+   ac_cxx_werror_flag=$ac_save_cxx_werror_flag
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cxx_g" >&5
+$as_echo "$ac_cv_prog_cxx_g" >&6; }
+if test "$ac_test_CXXFLAGS" = set; then
+  CXXFLAGS=$ac_save_CXXFLAGS
+elif test $ac_cv_prog_cxx_g = yes; then
+  if test "$GXX" = yes; then
+    CXXFLAGS="-g -O2"
+  else
+    CXXFLAGS="-g"
+  fi
+else
+  if test "$GXX" = yes; then
+    CXXFLAGS="-O2"
+  else
+    CXXFLAGS=
+  fi
+fi
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+depcc="$CXX"  am_compiler_list=
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking dependency style of $depcc" >&5
+$as_echo_n "checking dependency style of $depcc... " >&6; }
+if ${am_cv_CXX_dependencies_compiler_type+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -z "$AMDEP_TRUE" && test -f "$am_depcomp"; then
+  # We make a subdir and do the tests there.  Otherwise we can end up
+  # making bogus files that we don't know about and never remove.  For
+  # instance it was reported that on HP-UX the gcc test will end up
+  # making a dummy file named 'D' -- because '-MD' means "put the output
+  # in D".
+  rm -rf conftest.dir
+  mkdir conftest.dir
+  # Copy depcomp to subdir because otherwise we won't find it if we're
+  # using a relative directory.
+  cp "$am_depcomp" conftest.dir
+  cd conftest.dir
+  # We will build objects and dependencies in a subdirectory because
+  # it helps to detect inapplicable dependency modes.  For instance
+  # both Tru64's cc and ICC support -MD to output dependencies as a
+  # side effect of compilation, but ICC will put the dependencies in
+  # the current directory while Tru64 will put them in the object
+  # directory.
+  mkdir sub
+
+  am_cv_CXX_dependencies_compiler_type=none
+  if test "$am_compiler_list" = ""; then
+     am_compiler_list=`sed -n 's/^#*\([a-zA-Z0-9]*\))$/\1/p' < ./depcomp`
+  fi
+  am__universal=false
+  case " $depcc " in #(
+     *\ -arch\ *\ -arch\ *) am__universal=true ;;
+     esac
+
+  for depmode in $am_compiler_list; do
+    # Setup a source with many dependencies, because some compilers
+    # like to wrap large dependency lists on column 80 (with \), and
+    # we should not choose a depcomp mode which is confused by this.
+    #
+    # We need to recreate these files for each test, as the compiler may
+    # overwrite some of them when testing with obscure command lines.
+    # This happens at least with the AIX C compiler.
+    : > sub/conftest.c
+    for i in 1 2 3 4 5 6; do
+      echo '#include "conftst'$i'.h"' >> sub/conftest.c
+      # Using ": > sub/conftst$i.h" creates only sub/conftst1.h with
+      # Solaris 10 /bin/sh.
+      echo '/* dummy */' > sub/conftst$i.h
+    done
+    echo "${am__include} ${am__quote}sub/conftest.Po${am__quote}" > confmf
+
+    # We check with '-c' and '-o' for the sake of the "dashmstdout"
+    # mode.  It turns out that the SunPro C++ compiler does not properly
+    # handle '-M -o', and we need to detect this.  Also, some Intel
+    # versions had trouble with output in subdirs.
+    am__obj=sub/conftest.${OBJEXT-o}
+    am__minus_obj="-o $am__obj"
+    case $depmode in
+    gcc)
+      # This depmode causes a compiler race in universal mode.
+      test "$am__universal" = false || continue
+      ;;
+    nosideeffect)
+      # After this tag, mechanisms are not by side-effect, so they'll
+      # only be used when explicitly requested.
+      if test "x$enable_dependency_tracking" = xyes; then
+	continue
+      else
+	break
+      fi
+      ;;
+    msvc7 | msvc7msys | msvisualcpp | msvcmsys)
+      # This compiler won't grok '-c -o', but also, the minuso test has
+      # not run yet.  These depmodes are late enough in the game, and
+      # so weak that their functioning should not be impacted.
+      am__obj=conftest.${OBJEXT-o}
+      am__minus_obj=
+      ;;
+    none) break ;;
+    esac
+    if depmode=$depmode \
+       source=sub/conftest.c object=$am__obj \
+       depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo \
+       $SHELL ./depcomp $depcc -c $am__minus_obj sub/conftest.c \
+         >/dev/null 2>conftest.err &&
+       grep sub/conftst1.h sub/conftest.Po > /dev/null 2>&1 &&
+       grep sub/conftst6.h sub/conftest.Po > /dev/null 2>&1 &&
+       grep $am__obj sub/conftest.Po > /dev/null 2>&1 &&
+       ${MAKE-make} -s -f confmf > /dev/null 2>&1; then
+      # icc doesn't choke on unknown options, it will just issue warnings
+      # or remarks (even with -Werror).  So we grep stderr for any message
+      # that says an option was ignored or not supported.
+      # When given -MP, icc 7.0 and 7.1 complain thusly:
+      #   icc: Command line warning: ignoring option '-M'; no argument required
+      # The diagnosis changed in icc 8.0:
+      #   icc: Command line remark: option '-MP' not supported
+      if (grep 'ignoring option' conftest.err ||
+          grep 'not supported' conftest.err) >/dev/null 2>&1; then :; else
+        am_cv_CXX_dependencies_compiler_type=$depmode
+        break
+      fi
+    fi
+  done
+
+  cd ..
+  rm -rf conftest.dir
+else
+  am_cv_CXX_dependencies_compiler_type=none
+fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $am_cv_CXX_dependencies_compiler_type" >&5
+$as_echo "$am_cv_CXX_dependencies_compiler_type" >&6; }
+CXXDEPMODE=depmode=$am_cv_CXX_dependencies_compiler_type
+
+ if
+  test "x$enable_dependency_tracking" != xno \
+  && test "$am_cv_CXX_dependencies_compiler_type" = gcc3; then
+  am__fastdepCXX_TRUE=
+  am__fastdepCXX_FALSE='#'
+else
+  am__fastdepCXX_TRUE='#'
+  am__fastdepCXX_FALSE=
+fi
+
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ${MAKE-make} sets \$(MAKE)" >&5
+$as_echo_n "checking whether ${MAKE-make} sets \$(MAKE)... " >&6; }
+set x ${MAKE-make}
+ac_make=`$as_echo "$2" | sed 's/+/p/g; s/[^a-zA-Z0-9_]/_/g'`
+if eval \${ac_cv_prog_make_${ac_make}_set+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat >conftest.make <<\_ACEOF
+SHELL = /bin/sh
+all:
+	@echo '@@@%%%=$(MAKE)=@@@%%%'
+_ACEOF
+# GNU make sometimes prints "make[1]: Entering ...", which would confuse us.
+case `${MAKE-make} -f conftest.make 2>/dev/null` in
+  *@@@%%%=?*=@@@%%%*)
+    eval ac_cv_prog_make_${ac_make}_set=yes;;
+  *)
+    eval ac_cv_prog_make_${ac_make}_set=no;;
+esac
+rm -f conftest.make
+fi
+if eval test \$ac_cv_prog_make_${ac_make}_set = yes; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+  SET_MAKE=
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+  SET_MAKE="MAKE=${MAKE-make}"
+fi
+
+
+if test -n "$ac_tool_prefix"; then
+  for ac_prog in ar lib "link -lib"
+  do
+    # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
+set dummy $ac_tool_prefix$ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_AR+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$AR"; then
+  ac_cv_prog_AR="$AR" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_AR="$ac_tool_prefix$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+AR=$ac_cv_prog_AR
+if test -n "$AR"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AR" >&5
+$as_echo "$AR" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+    test -n "$AR" && break
+  done
+fi
+if test -z "$AR"; then
+  ac_ct_AR=$AR
+  for ac_prog in ar lib "link -lib"
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_ac_ct_AR+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_AR"; then
+  ac_cv_prog_ac_ct_AR="$ac_ct_AR" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_AR="$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_AR=$ac_cv_prog_ac_ct_AR
+if test -n "$ac_ct_AR"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_AR" >&5
+$as_echo "$ac_ct_AR" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$ac_ct_AR" && break
+done
+
+  if test "x$ac_ct_AR" = x; then
+    AR="false"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    AR=$ac_ct_AR
+  fi
+fi
+
+: ${AR=ar}
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking the archiver ($AR) interface" >&5
+$as_echo_n "checking the archiver ($AR) interface... " >&6; }
+if ${am_cv_ar_interface+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+   am_cv_ar_interface=ar
+   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+int some_variable = 0;
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  am_ar_try='$AR cru libconftest.a conftest.$ac_objext >&5'
+      { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$am_ar_try\""; } >&5
+  (eval $am_ar_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+      if test "$ac_status" -eq 0; then
+        am_cv_ar_interface=ar
+      else
+        am_ar_try='$AR -NOLOGO -OUT:conftest.lib conftest.$ac_objext >&5'
+        { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$am_ar_try\""; } >&5
+  (eval $am_ar_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+        if test "$ac_status" -eq 0; then
+          am_cv_ar_interface=lib
+        else
+          am_cv_ar_interface=unknown
+        fi
+      fi
+      rm -f conftest.lib libconftest.a
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+   ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $am_cv_ar_interface" >&5
+$as_echo "$am_cv_ar_interface" >&6; }
+
+case $am_cv_ar_interface in
+ar)
+  ;;
+lib)
+  # Microsoft lib, so override with the ar-lib wrapper script.
+  # FIXME: It is wrong to rewrite AR.
+  # But if we don't then we get into trouble of one sort or another.
+  # A longer-term fix would be to have automake use am__AR in this case,
+  # and then we could set am__AR="$am_aux_dir/ar-lib \$(AR)" or something
+  # similar.
+  AR="$am_aux_dir/ar-lib $AR"
+  ;;
+unknown)
+  as_fn_error $? "could not determine $AR interface" "$LINENO" 5
+  ;;
+esac
+
+case `pwd` in
+  *\ * | *\	*)
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Libtool does not cope well with whitespace in \`pwd\`" >&5
+$as_echo "$as_me: WARNING: Libtool does not cope well with whitespace in \`pwd\`" >&2;} ;;
+esac
+
+
+
+macro_version='2.4.6'
+macro_revision='2.4.6'
+
+
+
+
+
+
+
+
+
+
+
+
+
+ltmain=$ac_aux_dir/ltmain.sh
+
+# Backslashify metacharacters that are still active within
+# double-quoted strings.
+sed_quote_subst='s/\(["`$\\]\)/\\\1/g'
+
+# Same as above, but do not quote variable references.
+double_quote_subst='s/\(["`\\]\)/\\\1/g'
+
+# Sed substitution to delay expansion of an escaped shell variable in a
+# double_quote_subst'ed string.
+delay_variable_subst='s/\\\\\\\\\\\$/\\\\\\$/g'
+
+# Sed substitution to delay expansion of an escaped single quote.
+delay_single_quote_subst='s/'\''/'\'\\\\\\\'\''/g'
+
+# Sed substitution to avoid accidental globbing in evaled expressions
+no_glob_subst='s/\*/\\\*/g'
+
+ECHO='\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'
+ECHO=$ECHO$ECHO$ECHO$ECHO$ECHO
+ECHO=$ECHO$ECHO$ECHO$ECHO$ECHO$ECHO
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to print strings" >&5
+$as_echo_n "checking how to print strings... " >&6; }
+# Test print first, because it will be a builtin if present.
+if test "X`( print -r -- -n ) 2>/dev/null`" = X-n && \
+   test "X`print -r -- $ECHO 2>/dev/null`" = "X$ECHO"; then
+  ECHO='print -r --'
+elif test "X`printf %s $ECHO 2>/dev/null`" = "X$ECHO"; then
+  ECHO='printf %s\n'
+else
+  # Use this function as a fallback that always works.
+  func_fallback_echo ()
+  {
+    eval 'cat <<_LTECHO_EOF
+$1
+_LTECHO_EOF'
+  }
+  ECHO='func_fallback_echo'
+fi
+
+# func_echo_all arg...
+# Invoke $ECHO with all args, space-separated.
+func_echo_all ()
+{
+    $ECHO ""
+}
+
+case $ECHO in
+  printf*) { $as_echo "$as_me:${as_lineno-$LINENO}: result: printf" >&5
+$as_echo "printf" >&6; } ;;
+  print*) { $as_echo "$as_me:${as_lineno-$LINENO}: result: print -r" >&5
+$as_echo "print -r" >&6; } ;;
+  *) { $as_echo "$as_me:${as_lineno-$LINENO}: result: cat" >&5
+$as_echo "cat" >&6; } ;;
+esac
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for a sed that does not truncate output" >&5
+$as_echo_n "checking for a sed that does not truncate output... " >&6; }
+if ${ac_cv_path_SED+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+            ac_script=s/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb/
+     for ac_i in 1 2 3 4 5 6 7; do
+       ac_script="$ac_script$as_nl$ac_script"
+     done
+     echo "$ac_script" 2>/dev/null | sed 99q >conftest.sed
+     { ac_script=; unset ac_script;}
+     if test -z "$SED"; then
+  ac_path_SED_found=false
+  # Loop through the user's path and test for each of PROGNAME-LIST
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_prog in sed gsed; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
+      ac_path_SED="$as_dir/$ac_prog$ac_exec_ext"
+      as_fn_executable_p "$ac_path_SED" || continue
+# Check for GNU ac_path_SED and select it if it is found.
+  # Check for GNU $ac_path_SED
+case `"$ac_path_SED" --version 2>&1` in
+*GNU*)
+  ac_cv_path_SED="$ac_path_SED" ac_path_SED_found=:;;
+*)
+  ac_count=0
+  $as_echo_n 0123456789 >"conftest.in"
+  while :
+  do
+    cat "conftest.in" "conftest.in" >"conftest.tmp"
+    mv "conftest.tmp" "conftest.in"
+    cp "conftest.in" "conftest.nl"
+    $as_echo '' >> "conftest.nl"
+    "$ac_path_SED" -f conftest.sed < "conftest.nl" >"conftest.out" 2>/dev/null || break
+    diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
+    as_fn_arith $ac_count + 1 && ac_count=$as_val
+    if test $ac_count -gt ${ac_path_SED_max-0}; then
+      # Best one so far, save it but keep looking for a better one
+      ac_cv_path_SED="$ac_path_SED"
+      ac_path_SED_max=$ac_count
+    fi
+    # 10*(2^10) chars as input seems more than enough
+    test $ac_count -gt 10 && break
+  done
+  rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
+esac
+
+      $ac_path_SED_found && break 3
+    done
+  done
+  done
+IFS=$as_save_IFS
+  if test -z "$ac_cv_path_SED"; then
+    as_fn_error $? "no acceptable sed could be found in \$PATH" "$LINENO" 5
+  fi
+else
+  ac_cv_path_SED=$SED
+fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_SED" >&5
+$as_echo "$ac_cv_path_SED" >&6; }
+ SED="$ac_cv_path_SED"
+  rm -f conftest.sed
+
+test -z "$SED" && SED=sed
+Xsed="$SED -e 1s/^X//"
+
+
+
+
+
+
+
+
+
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for grep that handles long lines and -e" >&5
+$as_echo_n "checking for grep that handles long lines and -e... " >&6; }
+if ${ac_cv_path_GREP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -z "$GREP"; then
+  ac_path_GREP_found=false
+  # Loop through the user's path and test for each of PROGNAME-LIST
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_prog in grep ggrep; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
+      ac_path_GREP="$as_dir/$ac_prog$ac_exec_ext"
+      as_fn_executable_p "$ac_path_GREP" || continue
+# Check for GNU ac_path_GREP and select it if it is found.
+  # Check for GNU $ac_path_GREP
+case `"$ac_path_GREP" --version 2>&1` in
+*GNU*)
+  ac_cv_path_GREP="$ac_path_GREP" ac_path_GREP_found=:;;
+*)
+  ac_count=0
+  $as_echo_n 0123456789 >"conftest.in"
+  while :
+  do
+    cat "conftest.in" "conftest.in" >"conftest.tmp"
+    mv "conftest.tmp" "conftest.in"
+    cp "conftest.in" "conftest.nl"
+    $as_echo 'GREP' >> "conftest.nl"
+    "$ac_path_GREP" -e 'GREP$' -e '-(cannot match)-' < "conftest.nl" >"conftest.out" 2>/dev/null || break
+    diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
+    as_fn_arith $ac_count + 1 && ac_count=$as_val
+    if test $ac_count -gt ${ac_path_GREP_max-0}; then
+      # Best one so far, save it but keep looking for a better one
+      ac_cv_path_GREP="$ac_path_GREP"
+      ac_path_GREP_max=$ac_count
+    fi
+    # 10*(2^10) chars as input seems more than enough
+    test $ac_count -gt 10 && break
+  done
+  rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
+esac
+
+      $ac_path_GREP_found && break 3
+    done
+  done
+  done
+IFS=$as_save_IFS
+  if test -z "$ac_cv_path_GREP"; then
+    as_fn_error $? "no acceptable grep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
+  fi
+else
+  ac_cv_path_GREP=$GREP
+fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_GREP" >&5
+$as_echo "$ac_cv_path_GREP" >&6; }
+ GREP="$ac_cv_path_GREP"
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for egrep" >&5
+$as_echo_n "checking for egrep... " >&6; }
+if ${ac_cv_path_EGREP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if echo a | $GREP -E '(a|b)' >/dev/null 2>&1
+   then ac_cv_path_EGREP="$GREP -E"
+   else
+     if test -z "$EGREP"; then
+  ac_path_EGREP_found=false
+  # Loop through the user's path and test for each of PROGNAME-LIST
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_prog in egrep; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
+      ac_path_EGREP="$as_dir/$ac_prog$ac_exec_ext"
+      as_fn_executable_p "$ac_path_EGREP" || continue
+# Check for GNU ac_path_EGREP and select it if it is found.
+  # Check for GNU $ac_path_EGREP
+case `"$ac_path_EGREP" --version 2>&1` in
+*GNU*)
+  ac_cv_path_EGREP="$ac_path_EGREP" ac_path_EGREP_found=:;;
+*)
+  ac_count=0
+  $as_echo_n 0123456789 >"conftest.in"
+  while :
+  do
+    cat "conftest.in" "conftest.in" >"conftest.tmp"
+    mv "conftest.tmp" "conftest.in"
+    cp "conftest.in" "conftest.nl"
+    $as_echo 'EGREP' >> "conftest.nl"
+    "$ac_path_EGREP" 'EGREP$' < "conftest.nl" >"conftest.out" 2>/dev/null || break
+    diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
+    as_fn_arith $ac_count + 1 && ac_count=$as_val
+    if test $ac_count -gt ${ac_path_EGREP_max-0}; then
+      # Best one so far, save it but keep looking for a better one
+      ac_cv_path_EGREP="$ac_path_EGREP"
+      ac_path_EGREP_max=$ac_count
+    fi
+    # 10*(2^10) chars as input seems more than enough
+    test $ac_count -gt 10 && break
+  done
+  rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
+esac
+
+      $ac_path_EGREP_found && break 3
+    done
+  done
+  done
+IFS=$as_save_IFS
+  if test -z "$ac_cv_path_EGREP"; then
+    as_fn_error $? "no acceptable egrep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
+  fi
+else
+  ac_cv_path_EGREP=$EGREP
+fi
+
+   fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_EGREP" >&5
+$as_echo "$ac_cv_path_EGREP" >&6; }
+ EGREP="$ac_cv_path_EGREP"
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for fgrep" >&5
+$as_echo_n "checking for fgrep... " >&6; }
+if ${ac_cv_path_FGREP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if echo 'ab*c' | $GREP -F 'ab*c' >/dev/null 2>&1
+   then ac_cv_path_FGREP="$GREP -F"
+   else
+     if test -z "$FGREP"; then
+  ac_path_FGREP_found=false
+  # Loop through the user's path and test for each of PROGNAME-LIST
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_prog in fgrep; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
+      ac_path_FGREP="$as_dir/$ac_prog$ac_exec_ext"
+      as_fn_executable_p "$ac_path_FGREP" || continue
+# Check for GNU ac_path_FGREP and select it if it is found.
+  # Check for GNU $ac_path_FGREP
+case `"$ac_path_FGREP" --version 2>&1` in
+*GNU*)
+  ac_cv_path_FGREP="$ac_path_FGREP" ac_path_FGREP_found=:;;
+*)
+  ac_count=0
+  $as_echo_n 0123456789 >"conftest.in"
+  while :
+  do
+    cat "conftest.in" "conftest.in" >"conftest.tmp"
+    mv "conftest.tmp" "conftest.in"
+    cp "conftest.in" "conftest.nl"
+    $as_echo 'FGREP' >> "conftest.nl"
+    "$ac_path_FGREP" FGREP < "conftest.nl" >"conftest.out" 2>/dev/null || break
+    diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
+    as_fn_arith $ac_count + 1 && ac_count=$as_val
+    if test $ac_count -gt ${ac_path_FGREP_max-0}; then
+      # Best one so far, save it but keep looking for a better one
+      ac_cv_path_FGREP="$ac_path_FGREP"
+      ac_path_FGREP_max=$ac_count
+    fi
+    # 10*(2^10) chars as input seems more than enough
+    test $ac_count -gt 10 && break
+  done
+  rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
+esac
+
+      $ac_path_FGREP_found && break 3
+    done
+  done
+  done
+IFS=$as_save_IFS
+  if test -z "$ac_cv_path_FGREP"; then
+    as_fn_error $? "no acceptable fgrep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
+  fi
+else
+  ac_cv_path_FGREP=$FGREP
+fi
+
+   fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_FGREP" >&5
+$as_echo "$ac_cv_path_FGREP" >&6; }
+ FGREP="$ac_cv_path_FGREP"
+
+
+test -z "$GREP" && GREP=grep
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+# Check whether --with-gnu-ld was given.
+if test "${with_gnu_ld+set}" = set; then :
+  withval=$with_gnu_ld; test no = "$withval" || with_gnu_ld=yes
+else
+  with_gnu_ld=no
+fi
+
+ac_prog=ld
+if test yes = "$GCC"; then
+  # Check if gcc -print-prog-name=ld gives a path.
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ld used by $CC" >&5
+$as_echo_n "checking for ld used by $CC... " >&6; }
+  case $host in
+  *-*-mingw*)
+    # gcc leaves a trailing carriage return, which upsets mingw
+    ac_prog=`($CC -print-prog-name=ld) 2>&5 | tr -d '\015'` ;;
+  *)
+    ac_prog=`($CC -print-prog-name=ld) 2>&5` ;;
+  esac
+  case $ac_prog in
+    # Accept absolute paths.
+    [\\/]* | ?:[\\/]*)
+      re_direlt='/[^/][^/]*/\.\./'
+      # Canonicalize the pathname of ld
+      ac_prog=`$ECHO "$ac_prog"| $SED 's%\\\\%/%g'`
+      while $ECHO "$ac_prog" | $GREP "$re_direlt" > /dev/null 2>&1; do
+	ac_prog=`$ECHO $ac_prog| $SED "s%$re_direlt%/%"`
+      done
+      test -z "$LD" && LD=$ac_prog
+      ;;
+  "")
+    # If it fails, then pretend we aren't using GCC.
+    ac_prog=ld
+    ;;
+  *)
+    # If it is relative, then search for the first ld in PATH.
+    with_gnu_ld=unknown
+    ;;
+  esac
+elif test yes = "$with_gnu_ld"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for GNU ld" >&5
+$as_echo_n "checking for GNU ld... " >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for non-GNU ld" >&5
+$as_echo_n "checking for non-GNU ld... " >&6; }
+fi
+if ${lt_cv_path_LD+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -z "$LD"; then
+  lt_save_ifs=$IFS; IFS=$PATH_SEPARATOR
+  for ac_dir in $PATH; do
+    IFS=$lt_save_ifs
+    test -z "$ac_dir" && ac_dir=.
+    if test -f "$ac_dir/$ac_prog" || test -f "$ac_dir/$ac_prog$ac_exeext"; then
+      lt_cv_path_LD=$ac_dir/$ac_prog
+      # Check to see if the program is GNU ld.  I'd rather use --version,
+      # but apparently some variants of GNU ld only accept -v.
+      # Break only if it was the GNU/non-GNU ld that we prefer.
+      case `"$lt_cv_path_LD" -v 2>&1 </dev/null` in
+      *GNU* | *'with BFD'*)
+	test no != "$with_gnu_ld" && break
+	;;
+      *)
+	test yes != "$with_gnu_ld" && break
+	;;
+      esac
+    fi
+  done
+  IFS=$lt_save_ifs
+else
+  lt_cv_path_LD=$LD # Let the user override the test with a path.
+fi
+fi
+
+LD=$lt_cv_path_LD
+if test -n "$LD"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LD" >&5
+$as_echo "$LD" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+test -z "$LD" && as_fn_error $? "no acceptable ld found in \$PATH" "$LINENO" 5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if the linker ($LD) is GNU ld" >&5
+$as_echo_n "checking if the linker ($LD) is GNU ld... " >&6; }
+if ${lt_cv_prog_gnu_ld+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  # I'd rather use --version here, but apparently some GNU lds only accept -v.
+case `$LD -v 2>&1 </dev/null` in
+*GNU* | *'with BFD'*)
+  lt_cv_prog_gnu_ld=yes
+  ;;
+*)
+  lt_cv_prog_gnu_ld=no
+  ;;
+esac
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_gnu_ld" >&5
+$as_echo "$lt_cv_prog_gnu_ld" >&6; }
+with_gnu_ld=$lt_cv_prog_gnu_ld
+
+
+
+
+
+
+
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for BSD- or MS-compatible name lister (nm)" >&5
+$as_echo_n "checking for BSD- or MS-compatible name lister (nm)... " >&6; }
+if ${lt_cv_path_NM+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$NM"; then
+  # Let the user override the test.
+  lt_cv_path_NM=$NM
+else
+  lt_nm_to_check=${ac_tool_prefix}nm
+  if test -n "$ac_tool_prefix" && test "$build" = "$host"; then
+    lt_nm_to_check="$lt_nm_to_check nm"
+  fi
+  for lt_tmp_nm in $lt_nm_to_check; do
+    lt_save_ifs=$IFS; IFS=$PATH_SEPARATOR
+    for ac_dir in $PATH /usr/ccs/bin/elf /usr/ccs/bin /usr/ucb /bin; do
+      IFS=$lt_save_ifs
+      test -z "$ac_dir" && ac_dir=.
+      tmp_nm=$ac_dir/$lt_tmp_nm
+      if test -f "$tmp_nm" || test -f "$tmp_nm$ac_exeext"; then
+	# Check to see if the nm accepts a BSD-compat flag.
+	# Adding the 'sed 1q' prevents false positives on HP-UX, which says:
+	#   nm: unknown option "B" ignored
+	# Tru64's nm complains that /dev/null is an invalid object file
+	# MSYS converts /dev/null to NUL, MinGW nm treats NUL as empty
+	case $build_os in
+	mingw*) lt_bad_file=conftest.nm/nofile ;;
+	*) lt_bad_file=/dev/null ;;
+	esac
+	case `"$tmp_nm" -B $lt_bad_file 2>&1 | sed '1q'` in
+	*$lt_bad_file* | *'Invalid file or object type'*)
+	  lt_cv_path_NM="$tmp_nm -B"
+	  break 2
+	  ;;
+	*)
+	  case `"$tmp_nm" -p /dev/null 2>&1 | sed '1q'` in
+	  */dev/null*)
+	    lt_cv_path_NM="$tmp_nm -p"
+	    break 2
+	    ;;
+	  *)
+	    lt_cv_path_NM=${lt_cv_path_NM="$tmp_nm"} # keep the first match, but
+	    continue # so that we can try to find one that supports BSD flags
+	    ;;
+	  esac
+	  ;;
+	esac
+      fi
+    done
+    IFS=$lt_save_ifs
+  done
+  : ${lt_cv_path_NM=no}
+fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_path_NM" >&5
+$as_echo "$lt_cv_path_NM" >&6; }
+if test no != "$lt_cv_path_NM"; then
+  NM=$lt_cv_path_NM
+else
+  # Didn't find any BSD compatible name lister, look for dumpbin.
+  if test -n "$DUMPBIN"; then :
+    # Let the user override the test.
+  else
+    if test -n "$ac_tool_prefix"; then
+  for ac_prog in dumpbin "link -dump"
+  do
+    # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
+set dummy $ac_tool_prefix$ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_DUMPBIN+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$DUMPBIN"; then
+  ac_cv_prog_DUMPBIN="$DUMPBIN" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_DUMPBIN="$ac_tool_prefix$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+DUMPBIN=$ac_cv_prog_DUMPBIN
+if test -n "$DUMPBIN"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DUMPBIN" >&5
+$as_echo "$DUMPBIN" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+    test -n "$DUMPBIN" && break
+  done
+fi
+if test -z "$DUMPBIN"; then
+  ac_ct_DUMPBIN=$DUMPBIN
+  for ac_prog in dumpbin "link -dump"
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_ac_ct_DUMPBIN+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_DUMPBIN"; then
+  ac_cv_prog_ac_ct_DUMPBIN="$ac_ct_DUMPBIN" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_DUMPBIN="$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_DUMPBIN=$ac_cv_prog_ac_ct_DUMPBIN
+if test -n "$ac_ct_DUMPBIN"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_DUMPBIN" >&5
+$as_echo "$ac_ct_DUMPBIN" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$ac_ct_DUMPBIN" && break
+done
+
+  if test "x$ac_ct_DUMPBIN" = x; then
+    DUMPBIN=":"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    DUMPBIN=$ac_ct_DUMPBIN
+  fi
+fi
+
+    case `$DUMPBIN -symbols -headers /dev/null 2>&1 | sed '1q'` in
+    *COFF*)
+      DUMPBIN="$DUMPBIN -symbols -headers"
+      ;;
+    *)
+      DUMPBIN=:
+      ;;
+    esac
+  fi
+
+  if test : != "$DUMPBIN"; then
+    NM=$DUMPBIN
+  fi
+fi
+test -z "$NM" && NM=nm
+
+
+
+
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking the name lister ($NM) interface" >&5
+$as_echo_n "checking the name lister ($NM) interface... " >&6; }
+if ${lt_cv_nm_interface+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_nm_interface="BSD nm"
+  echo "int some_variable = 0;" > conftest.$ac_ext
+  (eval echo "\"\$as_me:$LINENO: $ac_compile\"" >&5)
+  (eval "$ac_compile" 2>conftest.err)
+  cat conftest.err >&5
+  (eval echo "\"\$as_me:$LINENO: $NM \\\"conftest.$ac_objext\\\"\"" >&5)
+  (eval "$NM \"conftest.$ac_objext\"" 2>conftest.err > conftest.out)
+  cat conftest.err >&5
+  (eval echo "\"\$as_me:$LINENO: output\"" >&5)
+  cat conftest.out >&5
+  if $GREP 'External.*some_variable' conftest.out > /dev/null; then
+    lt_cv_nm_interface="MS dumpbin"
+  fi
+  rm -f conftest*
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_nm_interface" >&5
+$as_echo "$lt_cv_nm_interface" >&6; }
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ln -s works" >&5
+$as_echo_n "checking whether ln -s works... " >&6; }
+LN_S=$as_ln_s
+if test "$LN_S" = "ln -s"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no, using $LN_S" >&5
+$as_echo "no, using $LN_S" >&6; }
+fi
+
+# find the maximum length of command line arguments
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking the maximum length of command line arguments" >&5
+$as_echo_n "checking the maximum length of command line arguments... " >&6; }
+if ${lt_cv_sys_max_cmd_len+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+    i=0
+  teststring=ABCD
+
+  case $build_os in
+  msdosdjgpp*)
+    # On DJGPP, this test can blow up pretty badly due to problems in libc
+    # (any single argument exceeding 2000 bytes causes a buffer overrun
+    # during glob expansion).  Even if it were fixed, the result of this
+    # check would be larger than it should be.
+    lt_cv_sys_max_cmd_len=12288;    # 12K is about right
+    ;;
+
+  gnu*)
+    # Under GNU Hurd, this test is not required because there is
+    # no limit to the length of command line arguments.
+    # Libtool will interpret -1 as no limit whatsoever
+    lt_cv_sys_max_cmd_len=-1;
+    ;;
+
+  cygwin* | mingw* | cegcc*)
+    # On Win9x/ME, this test blows up -- it succeeds, but takes
+    # about 5 minutes as the teststring grows exponentially.
+    # Worse, since 9x/ME are not pre-emptively multitasking,
+    # you end up with a "frozen" computer, even though with patience
+    # the test eventually succeeds (with a max line length of 256k).
+    # Instead, let's just punt: use the minimum linelength reported by
+    # all of the supported platforms: 8192 (on NT/2K/XP).
+    lt_cv_sys_max_cmd_len=8192;
+    ;;
+
+  mint*)
+    # On MiNT this can take a long time and run out of memory.
+    lt_cv_sys_max_cmd_len=8192;
+    ;;
+
+  amigaos*)
+    # On AmigaOS with pdksh, this test takes hours, literally.
+    # So we just punt and use a minimum line length of 8192.
+    lt_cv_sys_max_cmd_len=8192;
+    ;;
+
+  bitrig* | darwin* | dragonfly* | freebsd* | netbsd* | openbsd*)
+    # This has been around since 386BSD, at least.  Likely further.
+    if test -x /sbin/sysctl; then
+      lt_cv_sys_max_cmd_len=`/sbin/sysctl -n kern.argmax`
+    elif test -x /usr/sbin/sysctl; then
+      lt_cv_sys_max_cmd_len=`/usr/sbin/sysctl -n kern.argmax`
+    else
+      lt_cv_sys_max_cmd_len=65536	# usable default for all BSDs
+    fi
+    # And add a safety zone
+    lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 4`
+    lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \* 3`
+    ;;
+
+  interix*)
+    # We know the value 262144 and hardcode it with a safety zone (like BSD)
+    lt_cv_sys_max_cmd_len=196608
+    ;;
+
+  os2*)
+    # The test takes a long time on OS/2.
+    lt_cv_sys_max_cmd_len=8192
+    ;;
+
+  osf*)
+    # Dr. Hans Ekkehard Plesser reports seeing a kernel panic running configure
+    # due to this test when exec_disable_arg_limit is 1 on Tru64. It is not
+    # nice to cause kernel panics so lets avoid the loop below.
+    # First set a reasonable default.
+    lt_cv_sys_max_cmd_len=16384
+    #
+    if test -x /sbin/sysconfig; then
+      case `/sbin/sysconfig -q proc exec_disable_arg_limit` in
+        *1*) lt_cv_sys_max_cmd_len=-1 ;;
+      esac
+    fi
+    ;;
+  sco3.2v5*)
+    lt_cv_sys_max_cmd_len=102400
+    ;;
+  sysv5* | sco5v6* | sysv4.2uw2*)
+    kargmax=`grep ARG_MAX /etc/conf/cf.d/stune 2>/dev/null`
+    if test -n "$kargmax"; then
+      lt_cv_sys_max_cmd_len=`echo $kargmax | sed 's/.*[	 ]//'`
+    else
+      lt_cv_sys_max_cmd_len=32768
+    fi
+    ;;
+  *)
+    lt_cv_sys_max_cmd_len=`(getconf ARG_MAX) 2> /dev/null`
+    if test -n "$lt_cv_sys_max_cmd_len" && \
+       test undefined != "$lt_cv_sys_max_cmd_len"; then
+      lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 4`
+      lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \* 3`
+    else
+      # Make teststring a little bigger before we do anything with it.
+      # a 1K string should be a reasonable start.
+      for i in 1 2 3 4 5 6 7 8; do
+        teststring=$teststring$teststring
+      done
+      SHELL=${SHELL-${CONFIG_SHELL-/bin/sh}}
+      # If test is not a shell built-in, we'll probably end up computing a
+      # maximum length that is only half of the actual maximum length, but
+      # we can't tell.
+      while { test X`env echo "$teststring$teststring" 2>/dev/null` \
+	         = "X$teststring$teststring"; } >/dev/null 2>&1 &&
+	      test 17 != "$i" # 1/2 MB should be enough
+      do
+        i=`expr $i + 1`
+        teststring=$teststring$teststring
+      done
+      # Only check the string length outside the loop.
+      lt_cv_sys_max_cmd_len=`expr "X$teststring" : ".*" 2>&1`
+      teststring=
+      # Add a significant safety factor because C++ compilers can tack on
+      # massive amounts of additional arguments before passing them to the
+      # linker.  It appears as though 1/2 is a usable value.
+      lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 2`
+    fi
+    ;;
+  esac
+
+fi
+
+if test -n "$lt_cv_sys_max_cmd_len"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_sys_max_cmd_len" >&5
+$as_echo "$lt_cv_sys_max_cmd_len" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: none" >&5
+$as_echo "none" >&6; }
+fi
+max_cmd_len=$lt_cv_sys_max_cmd_len
+
+
+
+
+
+
+: ${CP="cp -f"}
+: ${MV="mv -f"}
+: ${RM="rm -f"}
+
+if ( (MAIL=60; unset MAIL) || exit) >/dev/null 2>&1; then
+  lt_unset=unset
+else
+  lt_unset=false
+fi
+
+
+
+
+
+# test EBCDIC or ASCII
+case `echo X|tr X '\101'` in
+ A) # ASCII based system
+    # \n is not interpreted correctly by Solaris 8 /usr/ucb/tr
+  lt_SP2NL='tr \040 \012'
+  lt_NL2SP='tr \015\012 \040\040'
+  ;;
+ *) # EBCDIC based system
+  lt_SP2NL='tr \100 \n'
+  lt_NL2SP='tr \r\n \100\100'
+  ;;
+esac
+
+
+
+
+
+
+
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to convert $build file names to $host format" >&5
+$as_echo_n "checking how to convert $build file names to $host format... " >&6; }
+if ${lt_cv_to_host_file_cmd+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $host in
+  *-*-mingw* )
+    case $build in
+      *-*-mingw* ) # actually msys
+        lt_cv_to_host_file_cmd=func_convert_file_msys_to_w32
+        ;;
+      *-*-cygwin* )
+        lt_cv_to_host_file_cmd=func_convert_file_cygwin_to_w32
+        ;;
+      * ) # otherwise, assume *nix
+        lt_cv_to_host_file_cmd=func_convert_file_nix_to_w32
+        ;;
+    esac
+    ;;
+  *-*-cygwin* )
+    case $build in
+      *-*-mingw* ) # actually msys
+        lt_cv_to_host_file_cmd=func_convert_file_msys_to_cygwin
+        ;;
+      *-*-cygwin* )
+        lt_cv_to_host_file_cmd=func_convert_file_noop
+        ;;
+      * ) # otherwise, assume *nix
+        lt_cv_to_host_file_cmd=func_convert_file_nix_to_cygwin
+        ;;
+    esac
+    ;;
+  * ) # unhandled hosts (and "normal" native builds)
+    lt_cv_to_host_file_cmd=func_convert_file_noop
+    ;;
+esac
+
+fi
+
+to_host_file_cmd=$lt_cv_to_host_file_cmd
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_to_host_file_cmd" >&5
+$as_echo "$lt_cv_to_host_file_cmd" >&6; }
+
+
+
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to convert $build file names to toolchain format" >&5
+$as_echo_n "checking how to convert $build file names to toolchain format... " >&6; }
+if ${lt_cv_to_tool_file_cmd+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  #assume ordinary cross tools, or native build.
+lt_cv_to_tool_file_cmd=func_convert_file_noop
+case $host in
+  *-*-mingw* )
+    case $build in
+      *-*-mingw* ) # actually msys
+        lt_cv_to_tool_file_cmd=func_convert_file_msys_to_w32
+        ;;
+    esac
+    ;;
+esac
+
+fi
+
+to_tool_file_cmd=$lt_cv_to_tool_file_cmd
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_to_tool_file_cmd" >&5
+$as_echo "$lt_cv_to_tool_file_cmd" >&6; }
+
+
+
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $LD option to reload object files" >&5
+$as_echo_n "checking for $LD option to reload object files... " >&6; }
+if ${lt_cv_ld_reload_flag+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_ld_reload_flag='-r'
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ld_reload_flag" >&5
+$as_echo "$lt_cv_ld_reload_flag" >&6; }
+reload_flag=$lt_cv_ld_reload_flag
+case $reload_flag in
+"" | " "*) ;;
+*) reload_flag=" $reload_flag" ;;
+esac
+reload_cmds='$LD$reload_flag -o $output$reload_objs'
+case $host_os in
+  cygwin* | mingw* | pw32* | cegcc*)
+    if test yes != "$GCC"; then
+      reload_cmds=false
+    fi
+    ;;
+  darwin*)
+    if test yes = "$GCC"; then
+      reload_cmds='$LTCC $LTCFLAGS -nostdlib $wl-r -o $output$reload_objs'
+    else
+      reload_cmds='$LD$reload_flag -o $output$reload_objs'
+    fi
+    ;;
+esac
+
+
+
+
+
+
+
+
+
+if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}objdump", so it can be a program name with args.
+set dummy ${ac_tool_prefix}objdump; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_OBJDUMP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$OBJDUMP"; then
+  ac_cv_prog_OBJDUMP="$OBJDUMP" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_OBJDUMP="${ac_tool_prefix}objdump"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+OBJDUMP=$ac_cv_prog_OBJDUMP
+if test -n "$OBJDUMP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $OBJDUMP" >&5
+$as_echo "$OBJDUMP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_OBJDUMP"; then
+  ac_ct_OBJDUMP=$OBJDUMP
+  # Extract the first word of "objdump", so it can be a program name with args.
+set dummy objdump; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_ac_ct_OBJDUMP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_OBJDUMP"; then
+  ac_cv_prog_ac_ct_OBJDUMP="$ac_ct_OBJDUMP" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_OBJDUMP="objdump"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_OBJDUMP=$ac_cv_prog_ac_ct_OBJDUMP
+if test -n "$ac_ct_OBJDUMP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OBJDUMP" >&5
+$as_echo "$ac_ct_OBJDUMP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_ct_OBJDUMP" = x; then
+    OBJDUMP="false"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    OBJDUMP=$ac_ct_OBJDUMP
+  fi
+else
+  OBJDUMP="$ac_cv_prog_OBJDUMP"
+fi
+
+test -z "$OBJDUMP" && OBJDUMP=objdump
+
+
+
+
+
+
+
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to recognize dependent libraries" >&5
+$as_echo_n "checking how to recognize dependent libraries... " >&6; }
+if ${lt_cv_deplibs_check_method+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_file_magic_cmd='$MAGIC_CMD'
+lt_cv_file_magic_test_file=
+lt_cv_deplibs_check_method='unknown'
+# Need to set the preceding variable on all platforms that support
+# interlibrary dependencies.
+# 'none' -- dependencies not supported.
+# 'unknown' -- same as none, but documents that we really don't know.
+# 'pass_all' -- all dependencies passed with no checks.
+# 'test_compile' -- check by making test program.
+# 'file_magic [[regex]]' -- check by looking for files in library path
+# that responds to the $file_magic_cmd with a given extended regex.
+# If you have 'file' or equivalent on your system and you're not sure
+# whether 'pass_all' will *always* work, you probably want this one.
+
+case $host_os in
+aix[4-9]*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+beos*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+bsdi[45]*)
+  lt_cv_deplibs_check_method='file_magic ELF [0-9][0-9]*-bit [ML]SB (shared object|dynamic lib)'
+  lt_cv_file_magic_cmd='/usr/bin/file -L'
+  lt_cv_file_magic_test_file=/shlib/libc.so
+  ;;
+
+cygwin*)
+  # func_win32_libid is a shell function defined in ltmain.sh
+  lt_cv_deplibs_check_method='file_magic ^x86 archive import|^x86 DLL'
+  lt_cv_file_magic_cmd='func_win32_libid'
+  ;;
+
+mingw* | pw32*)
+  # Base MSYS/MinGW do not provide the 'file' command needed by
+  # func_win32_libid shell function, so use a weaker test based on 'objdump',
+  # unless we find 'file', for example because we are cross-compiling.
+  if ( file / ) >/dev/null 2>&1; then
+    lt_cv_deplibs_check_method='file_magic ^x86 archive import|^x86 DLL'
+    lt_cv_file_magic_cmd='func_win32_libid'
+  else
+    # Keep this pattern in sync with the one in func_win32_libid.
+    lt_cv_deplibs_check_method='file_magic file format (pei*-i386(.*architecture: i386)?|pe-arm-wince|pe-x86-64)'
+    lt_cv_file_magic_cmd='$OBJDUMP -f'
+  fi
+  ;;
+
+cegcc*)
+  # use the weaker test based on 'objdump'. See mingw*.
+  lt_cv_deplibs_check_method='file_magic file format pe-arm-.*little(.*architecture: arm)?'
+  lt_cv_file_magic_cmd='$OBJDUMP -f'
+  ;;
+
+darwin* | rhapsody*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+freebsd* | dragonfly*)
+  if echo __ELF__ | $CC -E - | $GREP __ELF__ > /dev/null; then
+    case $host_cpu in
+    i*86 )
+      # Not sure whether the presence of OpenBSD here was a mistake.
+      # Let's accept both of them until this is cleared up.
+      lt_cv_deplibs_check_method='file_magic (FreeBSD|OpenBSD|DragonFly)/i[3-9]86 (compact )?demand paged shared library'
+      lt_cv_file_magic_cmd=/usr/bin/file
+      lt_cv_file_magic_test_file=`echo /usr/lib/libc.so.*`
+      ;;
+    esac
+  else
+    lt_cv_deplibs_check_method=pass_all
+  fi
+  ;;
+
+haiku*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+hpux10.20* | hpux11*)
+  lt_cv_file_magic_cmd=/usr/bin/file
+  case $host_cpu in
+  ia64*)
+    lt_cv_deplibs_check_method='file_magic (s[0-9][0-9][0-9]|ELF-[0-9][0-9]) shared object file - IA64'
+    lt_cv_file_magic_test_file=/usr/lib/hpux32/libc.so
+    ;;
+  hppa*64*)
+    lt_cv_deplibs_check_method='file_magic (s[0-9][0-9][0-9]|ELF[ -][0-9][0-9])(-bit)?( [LM]SB)? shared object( file)?[, -]* PA-RISC [0-9]\.[0-9]'
+    lt_cv_file_magic_test_file=/usr/lib/pa20_64/libc.sl
+    ;;
+  *)
+    lt_cv_deplibs_check_method='file_magic (s[0-9][0-9][0-9]|PA-RISC[0-9]\.[0-9]) shared library'
+    lt_cv_file_magic_test_file=/usr/lib/libc.sl
+    ;;
+  esac
+  ;;
+
+interix[3-9]*)
+  # PIC code is broken on Interix 3.x, that's why |\.a not |_pic\.a here
+  lt_cv_deplibs_check_method='match_pattern /lib[^/]+(\.so|\.a)$'
+  ;;
+
+irix5* | irix6* | nonstopux*)
+  case $LD in
+  *-32|*"-32 ") libmagic=32-bit;;
+  *-n32|*"-n32 ") libmagic=N32;;
+  *-64|*"-64 ") libmagic=64-bit;;
+  *) libmagic=never-match;;
+  esac
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+# This must be glibc/ELF.
+linux* | k*bsd*-gnu | kopensolaris*-gnu | gnu*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+netbsd* | netbsdelf*-gnu)
+  if echo __ELF__ | $CC -E - | $GREP __ELF__ > /dev/null; then
+    lt_cv_deplibs_check_method='match_pattern /lib[^/]+(\.so\.[0-9]+\.[0-9]+|_pic\.a)$'
+  else
+    lt_cv_deplibs_check_method='match_pattern /lib[^/]+(\.so|_pic\.a)$'
+  fi
+  ;;
+
+newos6*)
+  lt_cv_deplibs_check_method='file_magic ELF [0-9][0-9]*-bit [ML]SB (executable|dynamic lib)'
+  lt_cv_file_magic_cmd=/usr/bin/file
+  lt_cv_file_magic_test_file=/usr/lib/libnls.so
+  ;;
+
+*nto* | *qnx*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+openbsd* | bitrig*)
+  if test -z "`echo __ELF__ | $CC -E - | $GREP __ELF__`"; then
+    lt_cv_deplibs_check_method='match_pattern /lib[^/]+(\.so\.[0-9]+\.[0-9]+|\.so|_pic\.a)$'
+  else
+    lt_cv_deplibs_check_method='match_pattern /lib[^/]+(\.so\.[0-9]+\.[0-9]+|_pic\.a)$'
+  fi
+  ;;
+
+osf3* | osf4* | osf5*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+rdos*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+solaris*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX* | sysv4*uw2*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+sysv4 | sysv4.3*)
+  case $host_vendor in
+  motorola)
+    lt_cv_deplibs_check_method='file_magic ELF [0-9][0-9]*-bit [ML]SB (shared object|dynamic lib) M[0-9][0-9]* Version [0-9]'
+    lt_cv_file_magic_test_file=`echo /usr/lib/libc.so*`
+    ;;
+  ncr)
+    lt_cv_deplibs_check_method=pass_all
+    ;;
+  sequent)
+    lt_cv_file_magic_cmd='/bin/file'
+    lt_cv_deplibs_check_method='file_magic ELF [0-9][0-9]*-bit [LM]SB (shared object|dynamic lib )'
+    ;;
+  sni)
+    lt_cv_file_magic_cmd='/bin/file'
+    lt_cv_deplibs_check_method="file_magic ELF [0-9][0-9]*-bit [LM]SB dynamic lib"
+    lt_cv_file_magic_test_file=/lib/libc.so
+    ;;
+  siemens)
+    lt_cv_deplibs_check_method=pass_all
+    ;;
+  pc)
+    lt_cv_deplibs_check_method=pass_all
+    ;;
+  esac
+  ;;
+
+tpf*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+os2*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+esac
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_deplibs_check_method" >&5
+$as_echo "$lt_cv_deplibs_check_method" >&6; }
+
+file_magic_glob=
+want_nocaseglob=no
+if test "$build" = "$host"; then
+  case $host_os in
+  mingw* | pw32*)
+    if ( shopt | grep nocaseglob ) >/dev/null 2>&1; then
+      want_nocaseglob=yes
+    else
+      file_magic_glob=`echo aAbBcCdDeEfFgGhHiIjJkKlLmMnNoOpPqQrRsStTuUvVwWxXyYzZ | $SED -e "s/\(..\)/s\/[\1]\/[\1]\/g;/g"`
+    fi
+    ;;
+  esac
+fi
+
+file_magic_cmd=$lt_cv_file_magic_cmd
+deplibs_check_method=$lt_cv_deplibs_check_method
+test -z "$deplibs_check_method" && deplibs_check_method=unknown
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}dlltool", so it can be a program name with args.
+set dummy ${ac_tool_prefix}dlltool; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_DLLTOOL+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$DLLTOOL"; then
+  ac_cv_prog_DLLTOOL="$DLLTOOL" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_DLLTOOL="${ac_tool_prefix}dlltool"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+DLLTOOL=$ac_cv_prog_DLLTOOL
+if test -n "$DLLTOOL"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DLLTOOL" >&5
+$as_echo "$DLLTOOL" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_DLLTOOL"; then
+  ac_ct_DLLTOOL=$DLLTOOL
+  # Extract the first word of "dlltool", so it can be a program name with args.
+set dummy dlltool; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_ac_ct_DLLTOOL+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_DLLTOOL"; then
+  ac_cv_prog_ac_ct_DLLTOOL="$ac_ct_DLLTOOL" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_DLLTOOL="dlltool"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_DLLTOOL=$ac_cv_prog_ac_ct_DLLTOOL
+if test -n "$ac_ct_DLLTOOL"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_DLLTOOL" >&5
+$as_echo "$ac_ct_DLLTOOL" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_ct_DLLTOOL" = x; then
+    DLLTOOL="false"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    DLLTOOL=$ac_ct_DLLTOOL
+  fi
+else
+  DLLTOOL="$ac_cv_prog_DLLTOOL"
+fi
+
+test -z "$DLLTOOL" && DLLTOOL=dlltool
+
+
+
+
+
+
+
+
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to associate runtime and link libraries" >&5
+$as_echo_n "checking how to associate runtime and link libraries... " >&6; }
+if ${lt_cv_sharedlib_from_linklib_cmd+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_sharedlib_from_linklib_cmd='unknown'
+
+case $host_os in
+cygwin* | mingw* | pw32* | cegcc*)
+  # two different shell functions defined in ltmain.sh;
+  # decide which one to use based on capabilities of $DLLTOOL
+  case `$DLLTOOL --help 2>&1` in
+  *--identify-strict*)
+    lt_cv_sharedlib_from_linklib_cmd=func_cygming_dll_for_implib
+    ;;
+  *)
+    lt_cv_sharedlib_from_linklib_cmd=func_cygming_dll_for_implib_fallback
+    ;;
+  esac
+  ;;
+*)
+  # fallback: assume linklib IS sharedlib
+  lt_cv_sharedlib_from_linklib_cmd=$ECHO
+  ;;
+esac
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_sharedlib_from_linklib_cmd" >&5
+$as_echo "$lt_cv_sharedlib_from_linklib_cmd" >&6; }
+sharedlib_from_linklib_cmd=$lt_cv_sharedlib_from_linklib_cmd
+test -z "$sharedlib_from_linklib_cmd" && sharedlib_from_linklib_cmd=$ECHO
+
+
+
+
+
+
+
+if test -n "$ac_tool_prefix"; then
+  for ac_prog in ar
+  do
+    # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
+set dummy $ac_tool_prefix$ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_AR+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$AR"; then
+  ac_cv_prog_AR="$AR" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_AR="$ac_tool_prefix$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+AR=$ac_cv_prog_AR
+if test -n "$AR"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AR" >&5
+$as_echo "$AR" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+    test -n "$AR" && break
+  done
+fi
+if test -z "$AR"; then
+  ac_ct_AR=$AR
+  for ac_prog in ar
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_ac_ct_AR+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_AR"; then
+  ac_cv_prog_ac_ct_AR="$ac_ct_AR" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_AR="$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_AR=$ac_cv_prog_ac_ct_AR
+if test -n "$ac_ct_AR"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_AR" >&5
+$as_echo "$ac_ct_AR" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$ac_ct_AR" && break
+done
+
+  if test "x$ac_ct_AR" = x; then
+    AR="false"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    AR=$ac_ct_AR
+  fi
+fi
+
+: ${AR=ar}
+: ${AR_FLAGS=cru}
+
+
+
+
+
+
+
+
+
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for archiver @FILE support" >&5
+$as_echo_n "checking for archiver @FILE support... " >&6; }
+if ${lt_cv_ar_at_file+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_ar_at_file=no
+   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  echo conftest.$ac_objext > conftest.lst
+      lt_ar_try='$AR $AR_FLAGS libconftest.a @conftest.lst >&5'
+      { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$lt_ar_try\""; } >&5
+  (eval $lt_ar_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+      if test 0 -eq "$ac_status"; then
+	# Ensure the archiver fails upon bogus file names.
+	rm -f conftest.$ac_objext libconftest.a
+	{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$lt_ar_try\""; } >&5
+  (eval $lt_ar_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+	if test 0 -ne "$ac_status"; then
+          lt_cv_ar_at_file=@
+        fi
+      fi
+      rm -f conftest.* libconftest.a
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ar_at_file" >&5
+$as_echo "$lt_cv_ar_at_file" >&6; }
+
+if test no = "$lt_cv_ar_at_file"; then
+  archiver_list_spec=
+else
+  archiver_list_spec=$lt_cv_ar_at_file
+fi
+
+
+
+
+
+
+
+if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}strip", so it can be a program name with args.
+set dummy ${ac_tool_prefix}strip; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_STRIP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$STRIP"; then
+  ac_cv_prog_STRIP="$STRIP" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_STRIP="${ac_tool_prefix}strip"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+STRIP=$ac_cv_prog_STRIP
+if test -n "$STRIP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $STRIP" >&5
+$as_echo "$STRIP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_STRIP"; then
+  ac_ct_STRIP=$STRIP
+  # Extract the first word of "strip", so it can be a program name with args.
+set dummy strip; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_ac_ct_STRIP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_STRIP"; then
+  ac_cv_prog_ac_ct_STRIP="$ac_ct_STRIP" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_STRIP="strip"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_STRIP=$ac_cv_prog_ac_ct_STRIP
+if test -n "$ac_ct_STRIP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_STRIP" >&5
+$as_echo "$ac_ct_STRIP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_ct_STRIP" = x; then
+    STRIP=":"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    STRIP=$ac_ct_STRIP
+  fi
+else
+  STRIP="$ac_cv_prog_STRIP"
+fi
+
+test -z "$STRIP" && STRIP=:
+
+
+
+
+
+
+if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}ranlib", so it can be a program name with args.
+set dummy ${ac_tool_prefix}ranlib; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_RANLIB+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$RANLIB"; then
+  ac_cv_prog_RANLIB="$RANLIB" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_RANLIB="${ac_tool_prefix}ranlib"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+RANLIB=$ac_cv_prog_RANLIB
+if test -n "$RANLIB"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $RANLIB" >&5
+$as_echo "$RANLIB" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_RANLIB"; then
+  ac_ct_RANLIB=$RANLIB
+  # Extract the first word of "ranlib", so it can be a program name with args.
+set dummy ranlib; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_ac_ct_RANLIB+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_RANLIB"; then
+  ac_cv_prog_ac_ct_RANLIB="$ac_ct_RANLIB" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_RANLIB="ranlib"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_RANLIB=$ac_cv_prog_ac_ct_RANLIB
+if test -n "$ac_ct_RANLIB"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_RANLIB" >&5
+$as_echo "$ac_ct_RANLIB" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_ct_RANLIB" = x; then
+    RANLIB=":"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    RANLIB=$ac_ct_RANLIB
+  fi
+else
+  RANLIB="$ac_cv_prog_RANLIB"
+fi
+
+test -z "$RANLIB" && RANLIB=:
+
+
+
+
+
+
+# Determine commands to create old-style static archives.
+old_archive_cmds='$AR $AR_FLAGS $oldlib$oldobjs'
+old_postinstall_cmds='chmod 644 $oldlib'
+old_postuninstall_cmds=
+
+if test -n "$RANLIB"; then
+  case $host_os in
+  bitrig* | openbsd*)
+    old_postinstall_cmds="$old_postinstall_cmds~\$RANLIB -t \$tool_oldlib"
+    ;;
+  *)
+    old_postinstall_cmds="$old_postinstall_cmds~\$RANLIB \$tool_oldlib"
+    ;;
+  esac
+  old_archive_cmds="$old_archive_cmds~\$RANLIB \$tool_oldlib"
+fi
+
+case $host_os in
+  darwin*)
+    lock_old_archive_extraction=yes ;;
+  *)
+    lock_old_archive_extraction=no ;;
+esac
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+# If no C compiler was specified, use CC.
+LTCC=${LTCC-"$CC"}
+
+# If no C compiler flags were specified, use CFLAGS.
+LTCFLAGS=${LTCFLAGS-"$CFLAGS"}
+
+# Allow CC to be a program name with arguments.
+compiler=$CC
+
+
+# Check for command to grab the raw symbol name followed by C symbol from nm.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking command to parse $NM output from $compiler object" >&5
+$as_echo_n "checking command to parse $NM output from $compiler object... " >&6; }
+if ${lt_cv_sys_global_symbol_pipe+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+
+# These are sane defaults that work on at least a few old systems.
+# [They come from Ultrix.  What could be older than Ultrix?!! ;)]
+
+# Character class describing NM global symbol codes.
+symcode='[BCDEGRST]'
+
+# Regexp to match symbols that can be accessed directly from C.
+sympat='\([_A-Za-z][_A-Za-z0-9]*\)'
+
+# Define system-specific variables.
+case $host_os in
+aix*)
+  symcode='[BCDT]'
+  ;;
+cygwin* | mingw* | pw32* | cegcc*)
+  symcode='[ABCDGISTW]'
+  ;;
+hpux*)
+  if test ia64 = "$host_cpu"; then
+    symcode='[ABCDEGRST]'
+  fi
+  ;;
+irix* | nonstopux*)
+  symcode='[BCDEGRST]'
+  ;;
+osf*)
+  symcode='[BCDEGQRST]'
+  ;;
+solaris*)
+  symcode='[BDRT]'
+  ;;
+sco3.2v5*)
+  symcode='[DT]'
+  ;;
+sysv4.2uw2*)
+  symcode='[DT]'
+  ;;
+sysv5* | sco5v6* | unixware* | OpenUNIX*)
+  symcode='[ABDT]'
+  ;;
+sysv4)
+  symcode='[DFNSTU]'
+  ;;
+esac
+
+# If we're using GNU nm, then use its standard symbol codes.
+case `$NM -V 2>&1` in
+*GNU* | *'with BFD'*)
+  symcode='[ABCDGIRSTW]' ;;
+esac
+
+if test "$lt_cv_nm_interface" = "MS dumpbin"; then
+  # Gets list of data symbols to import.
+  lt_cv_sys_global_symbol_to_import="sed -n -e 's/^I .* \(.*\)$/\1/p'"
+  # Adjust the below global symbol transforms to fixup imported variables.
+  lt_cdecl_hook=" -e 's/^I .* \(.*\)$/extern __declspec(dllimport) char \1;/p'"
+  lt_c_name_hook=" -e 's/^I .* \(.*\)$/  {\"\1\", (void *) 0},/p'"
+  lt_c_name_lib_hook="\
+  -e 's/^I .* \(lib.*\)$/  {\"\1\", (void *) 0},/p'\
+  -e 's/^I .* \(.*\)$/  {\"lib\1\", (void *) 0},/p'"
+else
+  # Disable hooks by default.
+  lt_cv_sys_global_symbol_to_import=
+  lt_cdecl_hook=
+  lt_c_name_hook=
+  lt_c_name_lib_hook=
+fi
+
+# Transform an extracted symbol line into a proper C declaration.
+# Some systems (esp. on ia64) link data and code symbols differently,
+# so use this general approach.
+lt_cv_sys_global_symbol_to_cdecl="sed -n"\
+$lt_cdecl_hook\
+" -e 's/^T .* \(.*\)$/extern int \1();/p'"\
+" -e 's/^$symcode$symcode* .* \(.*\)$/extern char \1;/p'"
+
+# Transform an extracted symbol line into symbol name and symbol address
+lt_cv_sys_global_symbol_to_c_name_address="sed -n"\
+$lt_c_name_hook\
+" -e 's/^: \(.*\) .*$/  {\"\1\", (void *) 0},/p'"\
+" -e 's/^$symcode$symcode* .* \(.*\)$/  {\"\1\", (void *) \&\1},/p'"
+
+# Transform an extracted symbol line into symbol name with lib prefix and
+# symbol address.
+lt_cv_sys_global_symbol_to_c_name_address_lib_prefix="sed -n"\
+$lt_c_name_lib_hook\
+" -e 's/^: \(.*\) .*$/  {\"\1\", (void *) 0},/p'"\
+" -e 's/^$symcode$symcode* .* \(lib.*\)$/  {\"\1\", (void *) \&\1},/p'"\
+" -e 's/^$symcode$symcode* .* \(.*\)$/  {\"lib\1\", (void *) \&\1},/p'"
+
+# Handle CRLF in mingw tool chain
+opt_cr=
+case $build_os in
+mingw*)
+  opt_cr=`$ECHO 'x\{0,1\}' | tr x '\015'` # option cr in regexp
+  ;;
+esac
+
+# Try without a prefix underscore, then with it.
+for ac_symprfx in "" "_"; do
+
+  # Transform symcode, sympat, and symprfx into a raw symbol and a C symbol.
+  symxfrm="\\1 $ac_symprfx\\2 \\2"
+
+  # Write the raw and C identifiers.
+  if test "$lt_cv_nm_interface" = "MS dumpbin"; then
+    # Fake it for dumpbin and say T for any non-static function,
+    # D for any global variable and I for any imported variable.
+    # Also find C++ and __fastcall symbols from MSVC++,
+    # which start with @ or ?.
+    lt_cv_sys_global_symbol_pipe="$AWK '"\
+"     {last_section=section; section=\$ 3};"\
+"     /^COFF SYMBOL TABLE/{for(i in hide) delete hide[i]};"\
+"     /Section length .*#relocs.*(pick any)/{hide[last_section]=1};"\
+"     /^ *Symbol name *: /{split(\$ 0,sn,\":\"); si=substr(sn[2],2)};"\
+"     /^ *Type *: code/{print \"T\",si,substr(si,length(prfx))};"\
+"     /^ *Type *: data/{print \"I\",si,substr(si,length(prfx))};"\
+"     \$ 0!~/External *\|/{next};"\
+"     / 0+ UNDEF /{next}; / UNDEF \([^|]\)*()/{next};"\
+"     {if(hide[section]) next};"\
+"     {f=\"D\"}; \$ 0~/\(\).*\|/{f=\"T\"};"\
+"     {split(\$ 0,a,/\||\r/); split(a[2],s)};"\
+"     s[1]~/^[@?]/{print f,s[1],s[1]; next};"\
+"     s[1]~prfx {split(s[1],t,\"@\"); print f,t[1],substr(t[1],length(prfx))}"\
+"     ' prfx=^$ac_symprfx"
+  else
+    lt_cv_sys_global_symbol_pipe="sed -n -e 's/^.*[	 ]\($symcode$symcode*\)[	 ][	 ]*$ac_symprfx$sympat$opt_cr$/$symxfrm/p'"
+  fi
+  lt_cv_sys_global_symbol_pipe="$lt_cv_sys_global_symbol_pipe | sed '/ __gnu_lto/d'"
+
+  # Check to see that the pipe works correctly.
+  pipe_works=no
+
+  rm -f conftest*
+  cat > conftest.$ac_ext <<_LT_EOF
+#ifdef __cplusplus
+extern "C" {
+#endif
+char nm_test_var;
+void nm_test_func(void);
+void nm_test_func(void){}
+#ifdef __cplusplus
+}
+#endif
+int main(){nm_test_var='a';nm_test_func();return(0);}
+_LT_EOF
+
+  if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
+    # Now try to grab the symbols.
+    nlist=conftest.nm
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$NM conftest.$ac_objext \| "$lt_cv_sys_global_symbol_pipe" \> $nlist\""; } >&5
+  (eval $NM conftest.$ac_objext \| "$lt_cv_sys_global_symbol_pipe" \> $nlist) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s "$nlist"; then
+      # Try sorting and uniquifying the output.
+      if sort "$nlist" | uniq > "$nlist"T; then
+	mv -f "$nlist"T "$nlist"
+      else
+	rm -f "$nlist"T
+      fi
+
+      # Make sure that we snagged all the symbols we need.
+      if $GREP ' nm_test_var$' "$nlist" >/dev/null; then
+	if $GREP ' nm_test_func$' "$nlist" >/dev/null; then
+	  cat <<_LT_EOF > conftest.$ac_ext
+/* Keep this code in sync between libtool.m4, ltmain, lt_system.h, and tests.  */
+#if defined _WIN32 || defined __CYGWIN__ || defined _WIN32_WCE
+/* DATA imports from DLLs on WIN32 can't be const, because runtime
+   relocations are performed -- see ld's documentation on pseudo-relocs.  */
+# define LT_DLSYM_CONST
+#elif defined __osf__
+/* This system does not cope well with relocations in const data.  */
+# define LT_DLSYM_CONST
+#else
+# define LT_DLSYM_CONST const
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+_LT_EOF
+	  # Now generate the symbol file.
+	  eval "$lt_cv_sys_global_symbol_to_cdecl"' < "$nlist" | $GREP -v main >> conftest.$ac_ext'
+
+	  cat <<_LT_EOF >> conftest.$ac_ext
+
+/* The mapping between symbol names and symbols.  */
+LT_DLSYM_CONST struct {
+  const char *name;
+  void       *address;
+}
+lt__PROGRAM__LTX_preloaded_symbols[] =
+{
+  { "@PROGRAM@", (void *) 0 },
+_LT_EOF
+	  $SED "s/^$symcode$symcode* .* \(.*\)$/  {\"\1\", (void *) \&\1},/" < "$nlist" | $GREP -v main >> conftest.$ac_ext
+	  cat <<\_LT_EOF >> conftest.$ac_ext
+  {0, (void *) 0}
+};
+
+/* This works around a problem in FreeBSD linker */
+#ifdef FREEBSD_WORKAROUND
+static const void *lt_preloaded_setup() {
+  return lt__PROGRAM__LTX_preloaded_symbols;
+}
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+_LT_EOF
+	  # Now try linking the two files.
+	  mv conftest.$ac_objext conftstm.$ac_objext
+	  lt_globsym_save_LIBS=$LIBS
+	  lt_globsym_save_CFLAGS=$CFLAGS
+	  LIBS=conftstm.$ac_objext
+	  CFLAGS="$CFLAGS$lt_prog_compiler_no_builtin_flag"
+	  if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+	    pipe_works=yes
+	  fi
+	  LIBS=$lt_globsym_save_LIBS
+	  CFLAGS=$lt_globsym_save_CFLAGS
+	else
+	  echo "cannot find nm_test_func in $nlist" >&5
+	fi
+      else
+	echo "cannot find nm_test_var in $nlist" >&5
+      fi
+    else
+      echo "cannot run $lt_cv_sys_global_symbol_pipe" >&5
+    fi
+  else
+    echo "$progname: failed program was:" >&5
+    cat conftest.$ac_ext >&5
+  fi
+  rm -rf conftest* conftst*
+
+  # Do not use the global_symbol_pipe unless it works.
+  if test yes = "$pipe_works"; then
+    break
+  else
+    lt_cv_sys_global_symbol_pipe=
+  fi
+done
+
+fi
+
+if test -z "$lt_cv_sys_global_symbol_pipe"; then
+  lt_cv_sys_global_symbol_to_cdecl=
+fi
+if test -z "$lt_cv_sys_global_symbol_pipe$lt_cv_sys_global_symbol_to_cdecl"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: failed" >&5
+$as_echo "failed" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: ok" >&5
+$as_echo "ok" >&6; }
+fi
+
+# Response file support.
+if test "$lt_cv_nm_interface" = "MS dumpbin"; then
+  nm_file_list_spec='@'
+elif $NM --help 2>/dev/null | grep '[@]FILE' >/dev/null; then
+  nm_file_list_spec='@'
+fi
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for sysroot" >&5
+$as_echo_n "checking for sysroot... " >&6; }
+
+# Check whether --with-sysroot was given.
+if test "${with_sysroot+set}" = set; then :
+  withval=$with_sysroot;
+else
+  with_sysroot=no
+fi
+
+
+lt_sysroot=
+case $with_sysroot in #(
+ yes)
+   if test yes = "$GCC"; then
+     lt_sysroot=`$CC --print-sysroot 2>/dev/null`
+   fi
+   ;; #(
+ /*)
+   lt_sysroot=`echo "$with_sysroot" | sed -e "$sed_quote_subst"`
+   ;; #(
+ no|'')
+   ;; #(
+ *)
+   { $as_echo "$as_me:${as_lineno-$LINENO}: result: $with_sysroot" >&5
+$as_echo "$with_sysroot" >&6; }
+   as_fn_error $? "The sysroot must be an absolute path." "$LINENO" 5
+   ;;
+esac
+
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: ${lt_sysroot:-no}" >&5
+$as_echo "${lt_sysroot:-no}" >&6; }
+
+
+
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for a working dd" >&5
+$as_echo_n "checking for a working dd... " >&6; }
+if ${ac_cv_path_lt_DD+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  printf 0123456789abcdef0123456789abcdef >conftest.i
+cat conftest.i conftest.i >conftest2.i
+: ${lt_DD:=$DD}
+if test -z "$lt_DD"; then
+  ac_path_lt_DD_found=false
+  # Loop through the user's path and test for each of PROGNAME-LIST
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_prog in dd; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
+      ac_path_lt_DD="$as_dir/$ac_prog$ac_exec_ext"
+      as_fn_executable_p "$ac_path_lt_DD" || continue
+if "$ac_path_lt_DD" bs=32 count=1 <conftest2.i >conftest.out 2>/dev/null; then
+  cmp -s conftest.i conftest.out \
+  && ac_cv_path_lt_DD="$ac_path_lt_DD" ac_path_lt_DD_found=:
+fi
+      $ac_path_lt_DD_found && break 3
+    done
+  done
+  done
+IFS=$as_save_IFS
+  if test -z "$ac_cv_path_lt_DD"; then
+    :
+  fi
+else
+  ac_cv_path_lt_DD=$lt_DD
+fi
+
+rm -f conftest.i conftest2.i conftest.out
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_lt_DD" >&5
+$as_echo "$ac_cv_path_lt_DD" >&6; }
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to truncate binary pipes" >&5
+$as_echo_n "checking how to truncate binary pipes... " >&6; }
+if ${lt_cv_truncate_bin+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  printf 0123456789abcdef0123456789abcdef >conftest.i
+cat conftest.i conftest.i >conftest2.i
+lt_cv_truncate_bin=
+if "$ac_cv_path_lt_DD" bs=32 count=1 <conftest2.i >conftest.out 2>/dev/null; then
+  cmp -s conftest.i conftest.out \
+  && lt_cv_truncate_bin="$ac_cv_path_lt_DD bs=4096 count=1"
+fi
+rm -f conftest.i conftest2.i conftest.out
+test -z "$lt_cv_truncate_bin" && lt_cv_truncate_bin="$SED -e 4q"
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_truncate_bin" >&5
+$as_echo "$lt_cv_truncate_bin" >&6; }
+
+
+
+
+
+
+
+# Calculate cc_basename.  Skip known compiler wrappers and cross-prefix.
+func_cc_basename ()
+{
+    for cc_temp in $*""; do
+      case $cc_temp in
+        compile | *[\\/]compile | ccache | *[\\/]ccache ) ;;
+        distcc | *[\\/]distcc | purify | *[\\/]purify ) ;;
+        \-*) ;;
+        *) break;;
+      esac
+    done
+    func_cc_basename_result=`$ECHO "$cc_temp" | $SED "s%.*/%%; s%^$host_alias-%%"`
+}
+
+# Check whether --enable-libtool-lock was given.
+if test "${enable_libtool_lock+set}" = set; then :
+  enableval=$enable_libtool_lock;
+fi
+
+test no = "$enable_libtool_lock" || enable_libtool_lock=yes
+
+# Some flags need to be propagated to the compiler or linker for good
+# libtool support.
+case $host in
+ia64-*-hpux*)
+  # Find out what ABI is being produced by ac_compile, and set mode
+  # options accordingly.
+  echo 'int i;' > conftest.$ac_ext
+  if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
+    case `/usr/bin/file conftest.$ac_objext` in
+      *ELF-32*)
+	HPUX_IA64_MODE=32
+	;;
+      *ELF-64*)
+	HPUX_IA64_MODE=64
+	;;
+    esac
+  fi
+  rm -rf conftest*
+  ;;
+*-*-irix6*)
+  # Find out what ABI is being produced by ac_compile, and set linker
+  # options accordingly.
+  echo '#line '$LINENO' "configure"' > conftest.$ac_ext
+  if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
+    if test yes = "$lt_cv_prog_gnu_ld"; then
+      case `/usr/bin/file conftest.$ac_objext` in
+	*32-bit*)
+	  LD="${LD-ld} -melf32bsmip"
+	  ;;
+	*N32*)
+	  LD="${LD-ld} -melf32bmipn32"
+	  ;;
+	*64-bit*)
+	  LD="${LD-ld} -melf64bmip"
+	;;
+      esac
+    else
+      case `/usr/bin/file conftest.$ac_objext` in
+	*32-bit*)
+	  LD="${LD-ld} -32"
+	  ;;
+	*N32*)
+	  LD="${LD-ld} -n32"
+	  ;;
+	*64-bit*)
+	  LD="${LD-ld} -64"
+	  ;;
+      esac
+    fi
+  fi
+  rm -rf conftest*
+  ;;
+
+mips64*-*linux*)
+  # Find out what ABI is being produced by ac_compile, and set linker
+  # options accordingly.
+  echo '#line '$LINENO' "configure"' > conftest.$ac_ext
+  if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
+    emul=elf
+    case `/usr/bin/file conftest.$ac_objext` in
+      *32-bit*)
+	emul="${emul}32"
+	;;
+      *64-bit*)
+	emul="${emul}64"
+	;;
+    esac
+    case `/usr/bin/file conftest.$ac_objext` in
+      *MSB*)
+	emul="${emul}btsmip"
+	;;
+      *LSB*)
+	emul="${emul}ltsmip"
+	;;
+    esac
+    case `/usr/bin/file conftest.$ac_objext` in
+      *N32*)
+	emul="${emul}n32"
+	;;
+    esac
+    LD="${LD-ld} -m $emul"
+  fi
+  rm -rf conftest*
+  ;;
+
+x86_64-*kfreebsd*-gnu|x86_64-*linux*|powerpc*-*linux*| \
+s390*-*linux*|s390*-*tpf*|sparc*-*linux*)
+  # Find out what ABI is being produced by ac_compile, and set linker
+  # options accordingly.  Note that the listed cases only cover the
+  # situations where additional linker options are needed (such as when
+  # doing 32-bit compilation for a host where ld defaults to 64-bit, or
+  # vice versa); the common cases where no linker options are needed do
+  # not appear in the list.
+  echo 'int i;' > conftest.$ac_ext
+  if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
+    case `/usr/bin/file conftest.o` in
+      *32-bit*)
+	case $host in
+	  x86_64-*kfreebsd*-gnu)
+	    LD="${LD-ld} -m elf_i386_fbsd"
+	    ;;
+	  x86_64-*linux*)
+	    case `/usr/bin/file conftest.o` in
+	      *x86-64*)
+		LD="${LD-ld} -m elf32_x86_64"
+		;;
+	      *)
+		LD="${LD-ld} -m elf_i386"
+		;;
+	    esac
+	    ;;
+	  powerpc64le-*linux*)
+	    LD="${LD-ld} -m elf32lppclinux"
+	    ;;
+	  powerpc64-*linux*)
+	    LD="${LD-ld} -m elf32ppclinux"
+	    ;;
+	  s390x-*linux*)
+	    LD="${LD-ld} -m elf_s390"
+	    ;;
+	  sparc64-*linux*)
+	    LD="${LD-ld} -m elf32_sparc"
+	    ;;
+	esac
+	;;
+      *64-bit*)
+	case $host in
+	  x86_64-*kfreebsd*-gnu)
+	    LD="${LD-ld} -m elf_x86_64_fbsd"
+	    ;;
+	  x86_64-*linux*)
+	    LD="${LD-ld} -m elf_x86_64"
+	    ;;
+	  powerpcle-*linux*)
+	    LD="${LD-ld} -m elf64lppc"
+	    ;;
+	  powerpc-*linux*)
+	    LD="${LD-ld} -m elf64ppc"
+	    ;;
+	  s390*-*linux*|s390*-*tpf*)
+	    LD="${LD-ld} -m elf64_s390"
+	    ;;
+	  sparc*-*linux*)
+	    LD="${LD-ld} -m elf64_sparc"
+	    ;;
+	esac
+	;;
+    esac
+  fi
+  rm -rf conftest*
+  ;;
+
+*-*-sco3.2v5*)
+  # On SCO OpenServer 5, we need -belf to get full-featured binaries.
+  SAVE_CFLAGS=$CFLAGS
+  CFLAGS="$CFLAGS -belf"
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the C compiler needs -belf" >&5
+$as_echo_n "checking whether the C compiler needs -belf... " >&6; }
+if ${lt_cv_cc_needs_belf+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  lt_cv_cc_needs_belf=yes
+else
+  lt_cv_cc_needs_belf=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+     ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_cc_needs_belf" >&5
+$as_echo "$lt_cv_cc_needs_belf" >&6; }
+  if test yes != "$lt_cv_cc_needs_belf"; then
+    # this is probably gcc 2.8.0, egcs 1.0 or newer; no need for -belf
+    CFLAGS=$SAVE_CFLAGS
+  fi
+  ;;
+*-*solaris*)
+  # Find out what ABI is being produced by ac_compile, and set linker
+  # options accordingly.
+  echo 'int i;' > conftest.$ac_ext
+  if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
+    case `/usr/bin/file conftest.o` in
+    *64-bit*)
+      case $lt_cv_prog_gnu_ld in
+      yes*)
+        case $host in
+        i?86-*-solaris*|x86_64-*-solaris*)
+          LD="${LD-ld} -m elf_x86_64"
+          ;;
+        sparc*-*-solaris*)
+          LD="${LD-ld} -m elf64_sparc"
+          ;;
+        esac
+        # GNU ld 2.21 introduced _sol2 emulations.  Use them if available.
+        if ${LD-ld} -V | grep _sol2 >/dev/null 2>&1; then
+          LD=${LD-ld}_sol2
+        fi
+        ;;
+      *)
+	if ${LD-ld} -64 -r -o conftest2.o conftest.o >/dev/null 2>&1; then
+	  LD="${LD-ld} -64"
+	fi
+	;;
+      esac
+      ;;
+    esac
+  fi
+  rm -rf conftest*
+  ;;
+esac
+
+need_locks=$enable_libtool_lock
+
+if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}mt", so it can be a program name with args.
+set dummy ${ac_tool_prefix}mt; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_MANIFEST_TOOL+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$MANIFEST_TOOL"; then
+  ac_cv_prog_MANIFEST_TOOL="$MANIFEST_TOOL" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_MANIFEST_TOOL="${ac_tool_prefix}mt"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+MANIFEST_TOOL=$ac_cv_prog_MANIFEST_TOOL
+if test -n "$MANIFEST_TOOL"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MANIFEST_TOOL" >&5
+$as_echo "$MANIFEST_TOOL" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_MANIFEST_TOOL"; then
+  ac_ct_MANIFEST_TOOL=$MANIFEST_TOOL
+  # Extract the first word of "mt", so it can be a program name with args.
+set dummy mt; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_ac_ct_MANIFEST_TOOL+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_MANIFEST_TOOL"; then
+  ac_cv_prog_ac_ct_MANIFEST_TOOL="$ac_ct_MANIFEST_TOOL" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_MANIFEST_TOOL="mt"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_MANIFEST_TOOL=$ac_cv_prog_ac_ct_MANIFEST_TOOL
+if test -n "$ac_ct_MANIFEST_TOOL"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_MANIFEST_TOOL" >&5
+$as_echo "$ac_ct_MANIFEST_TOOL" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_ct_MANIFEST_TOOL" = x; then
+    MANIFEST_TOOL=":"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    MANIFEST_TOOL=$ac_ct_MANIFEST_TOOL
+  fi
+else
+  MANIFEST_TOOL="$ac_cv_prog_MANIFEST_TOOL"
+fi
+
+test -z "$MANIFEST_TOOL" && MANIFEST_TOOL=mt
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if $MANIFEST_TOOL is a manifest tool" >&5
+$as_echo_n "checking if $MANIFEST_TOOL is a manifest tool... " >&6; }
+if ${lt_cv_path_mainfest_tool+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_path_mainfest_tool=no
+  echo "$as_me:$LINENO: $MANIFEST_TOOL '-?'" >&5
+  $MANIFEST_TOOL '-?' 2>conftest.err > conftest.out
+  cat conftest.err >&5
+  if $GREP 'Manifest Tool' conftest.out > /dev/null; then
+    lt_cv_path_mainfest_tool=yes
+  fi
+  rm -f conftest*
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_path_mainfest_tool" >&5
+$as_echo "$lt_cv_path_mainfest_tool" >&6; }
+if test yes != "$lt_cv_path_mainfest_tool"; then
+  MANIFEST_TOOL=:
+fi
+
+
+
+
+
+
+  case $host_os in
+    rhapsody* | darwin*)
+    if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}dsymutil", so it can be a program name with args.
+set dummy ${ac_tool_prefix}dsymutil; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_DSYMUTIL+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$DSYMUTIL"; then
+  ac_cv_prog_DSYMUTIL="$DSYMUTIL" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_DSYMUTIL="${ac_tool_prefix}dsymutil"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+DSYMUTIL=$ac_cv_prog_DSYMUTIL
+if test -n "$DSYMUTIL"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DSYMUTIL" >&5
+$as_echo "$DSYMUTIL" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_DSYMUTIL"; then
+  ac_ct_DSYMUTIL=$DSYMUTIL
+  # Extract the first word of "dsymutil", so it can be a program name with args.
+set dummy dsymutil; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_ac_ct_DSYMUTIL+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_DSYMUTIL"; then
+  ac_cv_prog_ac_ct_DSYMUTIL="$ac_ct_DSYMUTIL" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_DSYMUTIL="dsymutil"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_DSYMUTIL=$ac_cv_prog_ac_ct_DSYMUTIL
+if test -n "$ac_ct_DSYMUTIL"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_DSYMUTIL" >&5
+$as_echo "$ac_ct_DSYMUTIL" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_ct_DSYMUTIL" = x; then
+    DSYMUTIL=":"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    DSYMUTIL=$ac_ct_DSYMUTIL
+  fi
+else
+  DSYMUTIL="$ac_cv_prog_DSYMUTIL"
+fi
+
+    if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}nmedit", so it can be a program name with args.
+set dummy ${ac_tool_prefix}nmedit; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_NMEDIT+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$NMEDIT"; then
+  ac_cv_prog_NMEDIT="$NMEDIT" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_NMEDIT="${ac_tool_prefix}nmedit"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+NMEDIT=$ac_cv_prog_NMEDIT
+if test -n "$NMEDIT"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $NMEDIT" >&5
+$as_echo "$NMEDIT" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_NMEDIT"; then
+  ac_ct_NMEDIT=$NMEDIT
+  # Extract the first word of "nmedit", so it can be a program name with args.
+set dummy nmedit; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_ac_ct_NMEDIT+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_NMEDIT"; then
+  ac_cv_prog_ac_ct_NMEDIT="$ac_ct_NMEDIT" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_NMEDIT="nmedit"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_NMEDIT=$ac_cv_prog_ac_ct_NMEDIT
+if test -n "$ac_ct_NMEDIT"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_NMEDIT" >&5
+$as_echo "$ac_ct_NMEDIT" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_ct_NMEDIT" = x; then
+    NMEDIT=":"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    NMEDIT=$ac_ct_NMEDIT
+  fi
+else
+  NMEDIT="$ac_cv_prog_NMEDIT"
+fi
+
+    if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}lipo", so it can be a program name with args.
+set dummy ${ac_tool_prefix}lipo; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_LIPO+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$LIPO"; then
+  ac_cv_prog_LIPO="$LIPO" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_LIPO="${ac_tool_prefix}lipo"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+LIPO=$ac_cv_prog_LIPO
+if test -n "$LIPO"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LIPO" >&5
+$as_echo "$LIPO" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_LIPO"; then
+  ac_ct_LIPO=$LIPO
+  # Extract the first word of "lipo", so it can be a program name with args.
+set dummy lipo; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_ac_ct_LIPO+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_LIPO"; then
+  ac_cv_prog_ac_ct_LIPO="$ac_ct_LIPO" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_LIPO="lipo"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_LIPO=$ac_cv_prog_ac_ct_LIPO
+if test -n "$ac_ct_LIPO"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_LIPO" >&5
+$as_echo "$ac_ct_LIPO" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_ct_LIPO" = x; then
+    LIPO=":"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    LIPO=$ac_ct_LIPO
+  fi
+else
+  LIPO="$ac_cv_prog_LIPO"
+fi
+
+    if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}otool", so it can be a program name with args.
+set dummy ${ac_tool_prefix}otool; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_OTOOL+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$OTOOL"; then
+  ac_cv_prog_OTOOL="$OTOOL" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_OTOOL="${ac_tool_prefix}otool"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+OTOOL=$ac_cv_prog_OTOOL
+if test -n "$OTOOL"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $OTOOL" >&5
+$as_echo "$OTOOL" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_OTOOL"; then
+  ac_ct_OTOOL=$OTOOL
+  # Extract the first word of "otool", so it can be a program name with args.
+set dummy otool; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_ac_ct_OTOOL+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_OTOOL"; then
+  ac_cv_prog_ac_ct_OTOOL="$ac_ct_OTOOL" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_OTOOL="otool"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_OTOOL=$ac_cv_prog_ac_ct_OTOOL
+if test -n "$ac_ct_OTOOL"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OTOOL" >&5
+$as_echo "$ac_ct_OTOOL" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_ct_OTOOL" = x; then
+    OTOOL=":"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    OTOOL=$ac_ct_OTOOL
+  fi
+else
+  OTOOL="$ac_cv_prog_OTOOL"
+fi
+
+    if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}otool64", so it can be a program name with args.
+set dummy ${ac_tool_prefix}otool64; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_OTOOL64+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$OTOOL64"; then
+  ac_cv_prog_OTOOL64="$OTOOL64" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_OTOOL64="${ac_tool_prefix}otool64"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+OTOOL64=$ac_cv_prog_OTOOL64
+if test -n "$OTOOL64"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $OTOOL64" >&5
+$as_echo "$OTOOL64" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_OTOOL64"; then
+  ac_ct_OTOOL64=$OTOOL64
+  # Extract the first word of "otool64", so it can be a program name with args.
+set dummy otool64; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_ac_ct_OTOOL64+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_OTOOL64"; then
+  ac_cv_prog_ac_ct_OTOOL64="$ac_ct_OTOOL64" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_OTOOL64="otool64"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_OTOOL64=$ac_cv_prog_ac_ct_OTOOL64
+if test -n "$ac_ct_OTOOL64"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OTOOL64" >&5
+$as_echo "$ac_ct_OTOOL64" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_ct_OTOOL64" = x; then
+    OTOOL64=":"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    OTOOL64=$ac_ct_OTOOL64
+  fi
+else
+  OTOOL64="$ac_cv_prog_OTOOL64"
+fi
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -single_module linker flag" >&5
+$as_echo_n "checking for -single_module linker flag... " >&6; }
+if ${lt_cv_apple_cc_single_mod+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_apple_cc_single_mod=no
+      if test -z "$LT_MULTI_MODULE"; then
+	# By default we will add the -single_module flag. You can override
+	# by either setting the environment variable LT_MULTI_MODULE
+	# non-empty at configure time, or by adding -multi_module to the
+	# link flags.
+	rm -rf libconftest.dylib*
+	echo "int foo(void){return 1;}" > conftest.c
+	echo "$LTCC $LTCFLAGS $LDFLAGS -o libconftest.dylib \
+-dynamiclib -Wl,-single_module conftest.c" >&5
+	$LTCC $LTCFLAGS $LDFLAGS -o libconftest.dylib \
+	  -dynamiclib -Wl,-single_module conftest.c 2>conftest.err
+        _lt_result=$?
+	# If there is a non-empty error log, and "single_module"
+	# appears in it, assume the flag caused a linker warning
+        if test -s conftest.err && $GREP single_module conftest.err; then
+	  cat conftest.err >&5
+	# Otherwise, if the output was created with a 0 exit code from
+	# the compiler, it worked.
+	elif test -f libconftest.dylib && test 0 = "$_lt_result"; then
+	  lt_cv_apple_cc_single_mod=yes
+	else
+	  cat conftest.err >&5
+	fi
+	rm -rf libconftest.dylib*
+	rm -f conftest.*
+      fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_apple_cc_single_mod" >&5
+$as_echo "$lt_cv_apple_cc_single_mod" >&6; }
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -exported_symbols_list linker flag" >&5
+$as_echo_n "checking for -exported_symbols_list linker flag... " >&6; }
+if ${lt_cv_ld_exported_symbols_list+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_ld_exported_symbols_list=no
+      save_LDFLAGS=$LDFLAGS
+      echo "_main" > conftest.sym
+      LDFLAGS="$LDFLAGS -Wl,-exported_symbols_list,conftest.sym"
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  lt_cv_ld_exported_symbols_list=yes
+else
+  lt_cv_ld_exported_symbols_list=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+	LDFLAGS=$save_LDFLAGS
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ld_exported_symbols_list" >&5
+$as_echo "$lt_cv_ld_exported_symbols_list" >&6; }
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -force_load linker flag" >&5
+$as_echo_n "checking for -force_load linker flag... " >&6; }
+if ${lt_cv_ld_force_load+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_ld_force_load=no
+      cat > conftest.c << _LT_EOF
+int forced_loaded() { return 2;}
+_LT_EOF
+      echo "$LTCC $LTCFLAGS -c -o conftest.o conftest.c" >&5
+      $LTCC $LTCFLAGS -c -o conftest.o conftest.c 2>&5
+      echo "$AR cru libconftest.a conftest.o" >&5
+      $AR cru libconftest.a conftest.o 2>&5
+      echo "$RANLIB libconftest.a" >&5
+      $RANLIB libconftest.a 2>&5
+      cat > conftest.c << _LT_EOF
+int main() { return 0;}
+_LT_EOF
+      echo "$LTCC $LTCFLAGS $LDFLAGS -o conftest conftest.c -Wl,-force_load,./libconftest.a" >&5
+      $LTCC $LTCFLAGS $LDFLAGS -o conftest conftest.c -Wl,-force_load,./libconftest.a 2>conftest.err
+      _lt_result=$?
+      if test -s conftest.err && $GREP force_load conftest.err; then
+	cat conftest.err >&5
+      elif test -f conftest && test 0 = "$_lt_result" && $GREP forced_load conftest >/dev/null 2>&1; then
+	lt_cv_ld_force_load=yes
+      else
+	cat conftest.err >&5
+      fi
+        rm -f conftest.err libconftest.a conftest conftest.c
+        rm -rf conftest.dSYM
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ld_force_load" >&5
+$as_echo "$lt_cv_ld_force_load" >&6; }
+    case $host_os in
+    rhapsody* | darwin1.[012])
+      _lt_dar_allow_undefined='$wl-undefined ${wl}suppress' ;;
+    darwin1.*)
+      _lt_dar_allow_undefined='$wl-flat_namespace $wl-undefined ${wl}suppress' ;;
+    darwin*) # darwin 5.x on
+      # if running on 10.5 or later, the deployment target defaults
+      # to the OS version, if on x86, and 10.4, the deployment
+      # target defaults to 10.4. Don't you love it?
+      case ${MACOSX_DEPLOYMENT_TARGET-10.0},$host in
+	10.0,*86*-darwin8*|10.0,*-darwin[91]*)
+	  _lt_dar_allow_undefined='$wl-undefined ${wl}dynamic_lookup' ;;
+	10.[012][,.]*)
+	  _lt_dar_allow_undefined='$wl-flat_namespace $wl-undefined ${wl}suppress' ;;
+	10.*)
+	  _lt_dar_allow_undefined='$wl-undefined ${wl}dynamic_lookup' ;;
+      esac
+    ;;
+  esac
+    if test yes = "$lt_cv_apple_cc_single_mod"; then
+      _lt_dar_single_mod='$single_module'
+    fi
+    if test yes = "$lt_cv_ld_exported_symbols_list"; then
+      _lt_dar_export_syms=' $wl-exported_symbols_list,$output_objdir/$libname-symbols.expsym'
+    else
+      _lt_dar_export_syms='~$NMEDIT -s $output_objdir/$libname-symbols.expsym $lib'
+    fi
+    if test : != "$DSYMUTIL" && test no = "$lt_cv_ld_force_load"; then
+      _lt_dsymutil='~$DSYMUTIL $lib || :'
+    else
+      _lt_dsymutil=
+    fi
+    ;;
+  esac
+
+# func_munge_path_list VARIABLE PATH
+# -----------------------------------
+# VARIABLE is name of variable containing _space_ separated list of
+# directories to be munged by the contents of PATH, which is string
+# having a format:
+# "DIR[:DIR]:"
+#       string "DIR[ DIR]" will be prepended to VARIABLE
+# ":DIR[:DIR]"
+#       string "DIR[ DIR]" will be appended to VARIABLE
+# "DIRP[:DIRP]::[DIRA:]DIRA"
+#       string "DIRP[ DIRP]" will be prepended to VARIABLE and string
+#       "DIRA[ DIRA]" will be appended to VARIABLE
+# "DIR[:DIR]"
+#       VARIABLE will be replaced by "DIR[ DIR]"
+func_munge_path_list ()
+{
+    case x$2 in
+    x)
+        ;;
+    *:)
+        eval $1=\"`$ECHO $2 | $SED 's/:/ /g'` \$$1\"
+        ;;
+    x:*)
+        eval $1=\"\$$1 `$ECHO $2 | $SED 's/:/ /g'`\"
+        ;;
+    *::*)
+        eval $1=\"\$$1\ `$ECHO $2 | $SED -e 's/.*:://' -e 's/:/ /g'`\"
+        eval $1=\"`$ECHO $2 | $SED -e 's/::.*//' -e 's/:/ /g'`\ \$$1\"
+        ;;
+    *)
+        eval $1=\"`$ECHO $2 | $SED 's/:/ /g'`\"
+        ;;
+    esac
+}
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to run the C preprocessor" >&5
+$as_echo_n "checking how to run the C preprocessor... " >&6; }
+# On Suns, sometimes $CPP names a directory.
+if test -n "$CPP" && test -d "$CPP"; then
+  CPP=
+fi
+if test -z "$CPP"; then
+  if ${ac_cv_prog_CPP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+      # Double quotes because CPP needs to be expanded
+    for CPP in "$CC -E" "$CC -E -traditional-cpp" "/lib/cpp"
+    do
+      ac_preproc_ok=false
+for ac_c_preproc_warn_flag in '' yes
+do
+  # Use a header file that comes with gcc, so configuring glibc
+  # with a fresh cross-compiler works.
+  # Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
+  # <limits.h> exists even on freestanding compilers.
+  # On the NeXT, cc -E runs the code through the compiler's parser,
+  # not just through cpp. "Syntax error" is here to catch this case.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#ifdef __STDC__
+# include <limits.h>
+#else
+# include <assert.h>
+#endif
+		     Syntax error
+_ACEOF
+if ac_fn_c_try_cpp "$LINENO"; then :
+
+else
+  # Broken: fails on valid input.
+continue
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+
+  # OK, works on sane cases.  Now check whether nonexistent headers
+  # can be detected and how.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <ac_nonexistent.h>
+_ACEOF
+if ac_fn_c_try_cpp "$LINENO"; then :
+  # Broken: success on invalid input.
+continue
+else
+  # Passes both tests.
+ac_preproc_ok=:
+break
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+
+done
+# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
+rm -f conftest.i conftest.err conftest.$ac_ext
+if $ac_preproc_ok; then :
+  break
+fi
+
+    done
+    ac_cv_prog_CPP=$CPP
+
+fi
+  CPP=$ac_cv_prog_CPP
+else
+  ac_cv_prog_CPP=$CPP
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $CPP" >&5
+$as_echo "$CPP" >&6; }
+ac_preproc_ok=false
+for ac_c_preproc_warn_flag in '' yes
+do
+  # Use a header file that comes with gcc, so configuring glibc
+  # with a fresh cross-compiler works.
+  # Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
+  # <limits.h> exists even on freestanding compilers.
+  # On the NeXT, cc -E runs the code through the compiler's parser,
+  # not just through cpp. "Syntax error" is here to catch this case.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#ifdef __STDC__
+# include <limits.h>
+#else
+# include <assert.h>
+#endif
+		     Syntax error
+_ACEOF
+if ac_fn_c_try_cpp "$LINENO"; then :
+
+else
+  # Broken: fails on valid input.
+continue
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+
+  # OK, works on sane cases.  Now check whether nonexistent headers
+  # can be detected and how.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <ac_nonexistent.h>
+_ACEOF
+if ac_fn_c_try_cpp "$LINENO"; then :
+  # Broken: success on invalid input.
+continue
+else
+  # Passes both tests.
+ac_preproc_ok=:
+break
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+
+done
+# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
+rm -f conftest.i conftest.err conftest.$ac_ext
+if $ac_preproc_ok; then :
+
+else
+  { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "C preprocessor \"$CPP\" fails sanity check
+See \`config.log' for more details" "$LINENO" 5; }
+fi
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for ANSI C header files" >&5
+$as_echo_n "checking for ANSI C header files... " >&6; }
+if ${ac_cv_header_stdc+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <float.h>
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_header_stdc=yes
+else
+  ac_cv_header_stdc=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+
+if test $ac_cv_header_stdc = yes; then
+  # SunOS 4.x string.h does not declare mem*, contrary to ANSI.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <string.h>
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "memchr" >/dev/null 2>&1; then :
+
+else
+  ac_cv_header_stdc=no
+fi
+rm -f conftest*
+
+fi
+
+if test $ac_cv_header_stdc = yes; then
+  # ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdlib.h>
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "free" >/dev/null 2>&1; then :
+
+else
+  ac_cv_header_stdc=no
+fi
+rm -f conftest*
+
+fi
+
+if test $ac_cv_header_stdc = yes; then
+  # /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi.
+  if test "$cross_compiling" = yes; then :
+  :
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <ctype.h>
+#include <stdlib.h>
+#if ((' ' & 0x0FF) == 0x020)
+# define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
+# define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c))
+#else
+# define ISLOWER(c) \
+		   (('a' <= (c) && (c) <= 'i') \
+		     || ('j' <= (c) && (c) <= 'r') \
+		     || ('s' <= (c) && (c) <= 'z'))
+# define TOUPPER(c) (ISLOWER(c) ? ((c) | 0x40) : (c))
+#endif
+
+#define XOR(e, f) (((e) && !(f)) || (!(e) && (f)))
+int
+main ()
+{
+  int i;
+  for (i = 0; i < 256; i++)
+    if (XOR (islower (i), ISLOWER (i))
+	|| toupper (i) != TOUPPER (i))
+      return 2;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"; then :
+
+else
+  ac_cv_header_stdc=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_header_stdc" >&5
+$as_echo "$ac_cv_header_stdc" >&6; }
+if test $ac_cv_header_stdc = yes; then
+
+$as_echo "#define STDC_HEADERS 1" >>confdefs.h
+
+fi
+
+# On IRIX 5.3, sys/types and inttypes.h are conflicting.
+for ac_header in sys/types.h sys/stat.h stdlib.h string.h memory.h strings.h \
+		  inttypes.h stdint.h unistd.h
+do :
+  as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
+ac_fn_c_check_header_compile "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default
+"
+if eval test \"x\$"$as_ac_Header"\" = x"yes"; then :
+  cat >>confdefs.h <<_ACEOF
+#define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+
+done
+
+
+for ac_header in dlfcn.h
+do :
+  ac_fn_c_check_header_compile "$LINENO" "dlfcn.h" "ac_cv_header_dlfcn_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_dlfcn_h" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_DLFCN_H 1
+_ACEOF
+
+fi
+
+done
+
+
+
+
+func_stripname_cnf ()
+{
+  case $2 in
+  .*) func_stripname_result=`$ECHO "$3" | $SED "s%^$1%%; s%\\\\$2\$%%"`;;
+  *)  func_stripname_result=`$ECHO "$3" | $SED "s%^$1%%; s%$2\$%%"`;;
+  esac
+} # func_stripname_cnf
+
+
+
+
+
+# Set options
+
+
+
+        enable_dlopen=no
+
+
+  enable_win32_dll=no
+
+
+            # Check whether --enable-shared was given.
+if test "${enable_shared+set}" = set; then :
+  enableval=$enable_shared; p=${PACKAGE-default}
+    case $enableval in
+    yes) enable_shared=yes ;;
+    no) enable_shared=no ;;
+    *)
+      enable_shared=no
+      # Look at the argument we got.  We use all the common list separators.
+      lt_save_ifs=$IFS; IFS=$IFS$PATH_SEPARATOR,
+      for pkg in $enableval; do
+	IFS=$lt_save_ifs
+	if test "X$pkg" = "X$p"; then
+	  enable_shared=yes
+	fi
+      done
+      IFS=$lt_save_ifs
+      ;;
+    esac
+else
+  enable_shared=yes
+fi
+
+
+
+
+
+
+
+
+
+  # Check whether --enable-static was given.
+if test "${enable_static+set}" = set; then :
+  enableval=$enable_static; p=${PACKAGE-default}
+    case $enableval in
+    yes) enable_static=yes ;;
+    no) enable_static=no ;;
+    *)
+     enable_static=no
+      # Look at the argument we got.  We use all the common list separators.
+      lt_save_ifs=$IFS; IFS=$IFS$PATH_SEPARATOR,
+      for pkg in $enableval; do
+	IFS=$lt_save_ifs
+	if test "X$pkg" = "X$p"; then
+	  enable_static=yes
+	fi
+      done
+      IFS=$lt_save_ifs
+      ;;
+    esac
+else
+  enable_static=yes
+fi
+
+
+
+
+
+
+
+
+
+
+# Check whether --with-pic was given.
+if test "${with_pic+set}" = set; then :
+  withval=$with_pic; lt_p=${PACKAGE-default}
+    case $withval in
+    yes|no) pic_mode=$withval ;;
+    *)
+      pic_mode=default
+      # Look at the argument we got.  We use all the common list separators.
+      lt_save_ifs=$IFS; IFS=$IFS$PATH_SEPARATOR,
+      for lt_pkg in $withval; do
+	IFS=$lt_save_ifs
+	if test "X$lt_pkg" = "X$lt_p"; then
+	  pic_mode=yes
+	fi
+      done
+      IFS=$lt_save_ifs
+      ;;
+    esac
+else
+  pic_mode=default
+fi
+
+
+
+
+
+
+
+
+  # Check whether --enable-fast-install was given.
+if test "${enable_fast_install+set}" = set; then :
+  enableval=$enable_fast_install; p=${PACKAGE-default}
+    case $enableval in
+    yes) enable_fast_install=yes ;;
+    no) enable_fast_install=no ;;
+    *)
+      enable_fast_install=no
+      # Look at the argument we got.  We use all the common list separators.
+      lt_save_ifs=$IFS; IFS=$IFS$PATH_SEPARATOR,
+      for pkg in $enableval; do
+	IFS=$lt_save_ifs
+	if test "X$pkg" = "X$p"; then
+	  enable_fast_install=yes
+	fi
+      done
+      IFS=$lt_save_ifs
+      ;;
+    esac
+else
+  enable_fast_install=yes
+fi
+
+
+
+
+
+
+
+
+  shared_archive_member_spec=
+case $host,$enable_shared in
+power*-*-aix[5-9]*,yes)
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking which variant of shared library versioning to provide" >&5
+$as_echo_n "checking which variant of shared library versioning to provide... " >&6; }
+
+# Check whether --with-aix-soname was given.
+if test "${with_aix_soname+set}" = set; then :
+  withval=$with_aix_soname; case $withval in
+    aix|svr4|both)
+      ;;
+    *)
+      as_fn_error $? "Unknown argument to --with-aix-soname" "$LINENO" 5
+      ;;
+    esac
+    lt_cv_with_aix_soname=$with_aix_soname
+else
+  if ${lt_cv_with_aix_soname+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_with_aix_soname=aix
+fi
+
+    with_aix_soname=$lt_cv_with_aix_soname
+fi
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $with_aix_soname" >&5
+$as_echo "$with_aix_soname" >&6; }
+  if test aix != "$with_aix_soname"; then
+    # For the AIX way of multilib, we name the shared archive member
+    # based on the bitwidth used, traditionally 'shr.o' or 'shr_64.o',
+    # and 'shr.imp' or 'shr_64.imp', respectively, for the Import File.
+    # Even when GNU compilers ignore OBJECT_MODE but need '-maix64' flag,
+    # the AIX toolchain works better with OBJECT_MODE set (default 32).
+    if test 64 = "${OBJECT_MODE-32}"; then
+      shared_archive_member_spec=shr_64
+    else
+      shared_archive_member_spec=shr
+    fi
+  fi
+  ;;
+*)
+  with_aix_soname=aix
+  ;;
+esac
+
+
+
+
+
+
+
+
+
+
+# This can be used to rebuild libtool when needed
+LIBTOOL_DEPS=$ltmain
+
+# Always use our own libtool.
+LIBTOOL='$(SHELL) $(top_builddir)/libtool'
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+test -z "$LN_S" && LN_S="ln -s"
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+if test -n "${ZSH_VERSION+set}"; then
+   setopt NO_GLOB_SUBST
+fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for objdir" >&5
+$as_echo_n "checking for objdir... " >&6; }
+if ${lt_cv_objdir+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  rm -f .libs 2>/dev/null
+mkdir .libs 2>/dev/null
+if test -d .libs; then
+  lt_cv_objdir=.libs
+else
+  # MS-DOS does not allow filenames that begin with a dot.
+  lt_cv_objdir=_libs
+fi
+rmdir .libs 2>/dev/null
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_objdir" >&5
+$as_echo "$lt_cv_objdir" >&6; }
+objdir=$lt_cv_objdir
+
+
+
+
+
+cat >>confdefs.h <<_ACEOF
+#define LT_OBJDIR "$lt_cv_objdir/"
+_ACEOF
+
+
+
+
+case $host_os in
+aix3*)
+  # AIX sometimes has problems with the GCC collect2 program.  For some
+  # reason, if we set the COLLECT_NAMES environment variable, the problems
+  # vanish in a puff of smoke.
+  if test set != "${COLLECT_NAMES+set}"; then
+    COLLECT_NAMES=
+    export COLLECT_NAMES
+  fi
+  ;;
+esac
+
+# Global variables:
+ofile=libtool
+can_build_shared=yes
+
+# All known linkers require a '.a' archive for static linking (except MSVC,
+# which needs '.lib').
+libext=a
+
+with_gnu_ld=$lt_cv_prog_gnu_ld
+
+old_CC=$CC
+old_CFLAGS=$CFLAGS
+
+# Set sane defaults for various variables
+test -z "$CC" && CC=cc
+test -z "$LTCC" && LTCC=$CC
+test -z "$LTCFLAGS" && LTCFLAGS=$CFLAGS
+test -z "$LD" && LD=ld
+test -z "$ac_objext" && ac_objext=o
+
+func_cc_basename $compiler
+cc_basename=$func_cc_basename_result
+
+
+# Only perform the check for file, if the check method requires it
+test -z "$MAGIC_CMD" && MAGIC_CMD=file
+case $deplibs_check_method in
+file_magic*)
+  if test "$file_magic_cmd" = '$MAGIC_CMD'; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ${ac_tool_prefix}file" >&5
+$as_echo_n "checking for ${ac_tool_prefix}file... " >&6; }
+if ${lt_cv_path_MAGIC_CMD+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $MAGIC_CMD in
+[\\/*] |  ?:[\\/]*)
+  lt_cv_path_MAGIC_CMD=$MAGIC_CMD # Let the user override the test with a path.
+  ;;
+*)
+  lt_save_MAGIC_CMD=$MAGIC_CMD
+  lt_save_ifs=$IFS; IFS=$PATH_SEPARATOR
+  ac_dummy="/usr/bin$PATH_SEPARATOR$PATH"
+  for ac_dir in $ac_dummy; do
+    IFS=$lt_save_ifs
+    test -z "$ac_dir" && ac_dir=.
+    if test -f "$ac_dir/${ac_tool_prefix}file"; then
+      lt_cv_path_MAGIC_CMD=$ac_dir/"${ac_tool_prefix}file"
+      if test -n "$file_magic_test_file"; then
+	case $deplibs_check_method in
+	"file_magic "*)
+	  file_magic_regex=`expr "$deplibs_check_method" : "file_magic \(.*\)"`
+	  MAGIC_CMD=$lt_cv_path_MAGIC_CMD
+	  if eval $file_magic_cmd \$file_magic_test_file 2> /dev/null |
+	    $EGREP "$file_magic_regex" > /dev/null; then
+	    :
+	  else
+	    cat <<_LT_EOF 1>&2
+
+*** Warning: the command libtool uses to detect shared libraries,
+*** $file_magic_cmd, produces output that libtool cannot recognize.
+*** The result is that libtool may fail to recognize shared libraries
+*** as such.  This will affect the creation of libtool libraries that
+*** depend on shared libraries, but programs linked with such libtool
+*** libraries will work regardless of this problem.  Nevertheless, you
+*** may want to report the problem to your system manager and/or to
+*** bug-libtool@gnu.org
+
+_LT_EOF
+	  fi ;;
+	esac
+      fi
+      break
+    fi
+  done
+  IFS=$lt_save_ifs
+  MAGIC_CMD=$lt_save_MAGIC_CMD
+  ;;
+esac
+fi
+
+MAGIC_CMD=$lt_cv_path_MAGIC_CMD
+if test -n "$MAGIC_CMD"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MAGIC_CMD" >&5
+$as_echo "$MAGIC_CMD" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+
+
+
+if test -z "$lt_cv_path_MAGIC_CMD"; then
+  if test -n "$ac_tool_prefix"; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for file" >&5
+$as_echo_n "checking for file... " >&6; }
+if ${lt_cv_path_MAGIC_CMD+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $MAGIC_CMD in
+[\\/*] |  ?:[\\/]*)
+  lt_cv_path_MAGIC_CMD=$MAGIC_CMD # Let the user override the test with a path.
+  ;;
+*)
+  lt_save_MAGIC_CMD=$MAGIC_CMD
+  lt_save_ifs=$IFS; IFS=$PATH_SEPARATOR
+  ac_dummy="/usr/bin$PATH_SEPARATOR$PATH"
+  for ac_dir in $ac_dummy; do
+    IFS=$lt_save_ifs
+    test -z "$ac_dir" && ac_dir=.
+    if test -f "$ac_dir/file"; then
+      lt_cv_path_MAGIC_CMD=$ac_dir/"file"
+      if test -n "$file_magic_test_file"; then
+	case $deplibs_check_method in
+	"file_magic "*)
+	  file_magic_regex=`expr "$deplibs_check_method" : "file_magic \(.*\)"`
+	  MAGIC_CMD=$lt_cv_path_MAGIC_CMD
+	  if eval $file_magic_cmd \$file_magic_test_file 2> /dev/null |
+	    $EGREP "$file_magic_regex" > /dev/null; then
+	    :
+	  else
+	    cat <<_LT_EOF 1>&2
+
+*** Warning: the command libtool uses to detect shared libraries,
+*** $file_magic_cmd, produces output that libtool cannot recognize.
+*** The result is that libtool may fail to recognize shared libraries
+*** as such.  This will affect the creation of libtool libraries that
+*** depend on shared libraries, but programs linked with such libtool
+*** libraries will work regardless of this problem.  Nevertheless, you
+*** may want to report the problem to your system manager and/or to
+*** bug-libtool@gnu.org
+
+_LT_EOF
+	  fi ;;
+	esac
+      fi
+      break
+    fi
+  done
+  IFS=$lt_save_ifs
+  MAGIC_CMD=$lt_save_MAGIC_CMD
+  ;;
+esac
+fi
+
+MAGIC_CMD=$lt_cv_path_MAGIC_CMD
+if test -n "$MAGIC_CMD"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MAGIC_CMD" >&5
+$as_echo "$MAGIC_CMD" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  else
+    MAGIC_CMD=:
+  fi
+fi
+
+  fi
+  ;;
+esac
+
+# Use C for the default configuration in the libtool script
+
+lt_save_CC=$CC
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+# Source file extension for C test sources.
+ac_ext=c
+
+# Object file extension for compiled C test sources.
+objext=o
+objext=$objext
+
+# Code to be used in simple compile tests
+lt_simple_compile_test_code="int some_variable = 0;"
+
+# Code to be used in simple link tests
+lt_simple_link_test_code='int main(){return(0);}'
+
+
+
+
+
+
+
+# If no C compiler was specified, use CC.
+LTCC=${LTCC-"$CC"}
+
+# If no C compiler flags were specified, use CFLAGS.
+LTCFLAGS=${LTCFLAGS-"$CFLAGS"}
+
+# Allow CC to be a program name with arguments.
+compiler=$CC
+
+# Save the default compiler, since it gets overwritten when the other
+# tags are being tested, and _LT_TAGVAR(compiler, []) is a NOP.
+compiler_DEFAULT=$CC
+
+# save warnings/boilerplate of simple test code
+ac_outfile=conftest.$ac_objext
+echo "$lt_simple_compile_test_code" >conftest.$ac_ext
+eval "$ac_compile" 2>&1 >/dev/null | $SED '/^$/d; /^ *+/d' >conftest.err
+_lt_compiler_boilerplate=`cat conftest.err`
+$RM conftest*
+
+ac_outfile=conftest.$ac_objext
+echo "$lt_simple_link_test_code" >conftest.$ac_ext
+eval "$ac_link" 2>&1 >/dev/null | $SED '/^$/d; /^ *+/d' >conftest.err
+_lt_linker_boilerplate=`cat conftest.err`
+$RM -r conftest*
+
+
+if test -n "$compiler"; then
+
+lt_prog_compiler_no_builtin_flag=
+
+if test yes = "$GCC"; then
+  case $cc_basename in
+  nvcc*)
+    lt_prog_compiler_no_builtin_flag=' -Xcompiler -fno-builtin' ;;
+  *)
+    lt_prog_compiler_no_builtin_flag=' -fno-builtin' ;;
+  esac
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $compiler supports -fno-rtti -fno-exceptions" >&5
+$as_echo_n "checking if $compiler supports -fno-rtti -fno-exceptions... " >&6; }
+if ${lt_cv_prog_compiler_rtti_exceptions+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_prog_compiler_rtti_exceptions=no
+   ac_outfile=conftest.$ac_objext
+   echo "$lt_simple_compile_test_code" > conftest.$ac_ext
+   lt_compiler_flag="-fno-rtti -fno-exceptions"  ## exclude from sc_useless_quotes_in_assignment
+   # Insert the option either (1) after the last *FLAGS variable, or
+   # (2) before a word containing "conftest.", or (3) at the end.
+   # Note that $ac_compile itself does not contain backslashes and begins
+   # with a dollar sign (not a hyphen), so the echo should work correctly.
+   # The option is referenced via a variable to avoid confusing sed.
+   lt_compile=`echo "$ac_compile" | $SED \
+   -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
+   -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
+   -e 's:$: $lt_compiler_flag:'`
+   (eval echo "\"\$as_me:$LINENO: $lt_compile\"" >&5)
+   (eval "$lt_compile" 2>conftest.err)
+   ac_status=$?
+   cat conftest.err >&5
+   echo "$as_me:$LINENO: \$? = $ac_status" >&5
+   if (exit $ac_status) && test -s "$ac_outfile"; then
+     # The compiler can only warn and ignore the option if not recognized
+     # So say no if there are warnings other than the usual output.
+     $ECHO "$_lt_compiler_boilerplate" | $SED '/^$/d' >conftest.exp
+     $SED '/^$/d; /^ *+/d' conftest.err >conftest.er2
+     if test ! -s conftest.er2 || diff conftest.exp conftest.er2 >/dev/null; then
+       lt_cv_prog_compiler_rtti_exceptions=yes
+     fi
+   fi
+   $RM conftest*
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_rtti_exceptions" >&5
+$as_echo "$lt_cv_prog_compiler_rtti_exceptions" >&6; }
+
+if test yes = "$lt_cv_prog_compiler_rtti_exceptions"; then
+    lt_prog_compiler_no_builtin_flag="$lt_prog_compiler_no_builtin_flag -fno-rtti -fno-exceptions"
+else
+    :
+fi
+
+fi
+
+
+
+
+
+
+  lt_prog_compiler_wl=
+lt_prog_compiler_pic=
+lt_prog_compiler_static=
+
+
+  if test yes = "$GCC"; then
+    lt_prog_compiler_wl='-Wl,'
+    lt_prog_compiler_static='-static'
+
+    case $host_os in
+      aix*)
+      # All AIX code is PIC.
+      if test ia64 = "$host_cpu"; then
+	# AIX 5 now supports IA64 processor
+	lt_prog_compiler_static='-Bstatic'
+      fi
+      lt_prog_compiler_pic='-fPIC'
+      ;;
+
+    amigaos*)
+      case $host_cpu in
+      powerpc)
+            # see comment about AmigaOS4 .so support
+            lt_prog_compiler_pic='-fPIC'
+        ;;
+      m68k)
+            # FIXME: we need at least 68020 code to build shared libraries, but
+            # adding the '-m68020' flag to GCC prevents building anything better,
+            # like '-m68040'.
+            lt_prog_compiler_pic='-m68020 -resident32 -malways-restore-a4'
+        ;;
+      esac
+      ;;
+
+    beos* | irix5* | irix6* | nonstopux* | osf3* | osf4* | osf5*)
+      # PIC is the default for these OSes.
+      ;;
+
+    mingw* | cygwin* | pw32* | os2* | cegcc*)
+      # This hack is so that the source file can tell whether it is being
+      # built for inclusion in a dll (and should export symbols for example).
+      # Although the cygwin gcc ignores -fPIC, still need this for old-style
+      # (--disable-auto-import) libraries
+      lt_prog_compiler_pic='-DDLL_EXPORT'
+      case $host_os in
+      os2*)
+	lt_prog_compiler_static='$wl-static'
+	;;
+      esac
+      ;;
+
+    darwin* | rhapsody*)
+      # PIC is the default on this platform
+      # Common symbols not allowed in MH_DYLIB files
+      lt_prog_compiler_pic='-fno-common'
+      ;;
+
+    haiku*)
+      # PIC is the default for Haiku.
+      # The "-static" flag exists, but is broken.
+      lt_prog_compiler_static=
+      ;;
+
+    hpux*)
+      # PIC is the default for 64-bit PA HP-UX, but not for 32-bit
+      # PA HP-UX.  On IA64 HP-UX, PIC is the default but the pic flag
+      # sets the default TLS model and affects inlining.
+      case $host_cpu in
+      hppa*64*)
+	# +Z the default
+	;;
+      *)
+	lt_prog_compiler_pic='-fPIC'
+	;;
+      esac
+      ;;
+
+    interix[3-9]*)
+      # Interix 3.x gcc -fpic/-fPIC options generate broken code.
+      # Instead, we relocate shared libraries at runtime.
+      ;;
+
+    msdosdjgpp*)
+      # Just because we use GCC doesn't mean we suddenly get shared libraries
+      # on systems that don't support them.
+      lt_prog_compiler_can_build_shared=no
+      enable_shared=no
+      ;;
+
+    *nto* | *qnx*)
+      # QNX uses GNU C++, but need to define -shared option too, otherwise
+      # it will coredump.
+      lt_prog_compiler_pic='-fPIC -shared'
+      ;;
+
+    sysv4*MP*)
+      if test -d /usr/nec; then
+	lt_prog_compiler_pic=-Kconform_pic
+      fi
+      ;;
+
+    *)
+      lt_prog_compiler_pic='-fPIC'
+      ;;
+    esac
+
+    case $cc_basename in
+    nvcc*) # Cuda Compiler Driver 2.2
+      lt_prog_compiler_wl='-Xlinker '
+      if test -n "$lt_prog_compiler_pic"; then
+        lt_prog_compiler_pic="-Xcompiler $lt_prog_compiler_pic"
+      fi
+      ;;
+    esac
+  else
+    # PORTME Check for flag to pass linker flags through the system compiler.
+    case $host_os in
+    aix*)
+      lt_prog_compiler_wl='-Wl,'
+      if test ia64 = "$host_cpu"; then
+	# AIX 5 now supports IA64 processor
+	lt_prog_compiler_static='-Bstatic'
+      else
+	lt_prog_compiler_static='-bnso -bI:/lib/syscalls.exp'
+      fi
+      ;;
+
+    darwin* | rhapsody*)
+      # PIC is the default on this platform
+      # Common symbols not allowed in MH_DYLIB files
+      lt_prog_compiler_pic='-fno-common'
+      case $cc_basename in
+      nagfor*)
+        # NAG Fortran compiler
+        lt_prog_compiler_wl='-Wl,-Wl,,'
+        lt_prog_compiler_pic='-PIC'
+        lt_prog_compiler_static='-Bstatic'
+        ;;
+      esac
+      ;;
+
+    mingw* | cygwin* | pw32* | os2* | cegcc*)
+      # This hack is so that the source file can tell whether it is being
+      # built for inclusion in a dll (and should export symbols for example).
+      lt_prog_compiler_pic='-DDLL_EXPORT'
+      case $host_os in
+      os2*)
+	lt_prog_compiler_static='$wl-static'
+	;;
+      esac
+      ;;
+
+    hpux9* | hpux10* | hpux11*)
+      lt_prog_compiler_wl='-Wl,'
+      # PIC is the default for IA64 HP-UX and 64-bit HP-UX, but
+      # not for PA HP-UX.
+      case $host_cpu in
+      hppa*64*|ia64*)
+	# +Z the default
+	;;
+      *)
+	lt_prog_compiler_pic='+Z'
+	;;
+      esac
+      # Is there a better lt_prog_compiler_static that works with the bundled CC?
+      lt_prog_compiler_static='$wl-a ${wl}archive'
+      ;;
+
+    irix5* | irix6* | nonstopux*)
+      lt_prog_compiler_wl='-Wl,'
+      # PIC (with -KPIC) is the default.
+      lt_prog_compiler_static='-non_shared'
+      ;;
+
+    linux* | k*bsd*-gnu | kopensolaris*-gnu | gnu*)
+      case $cc_basename in
+      # old Intel for x86_64, which still supported -KPIC.
+      ecc*)
+	lt_prog_compiler_wl='-Wl,'
+	lt_prog_compiler_pic='-KPIC'
+	lt_prog_compiler_static='-static'
+        ;;
+      # icc used to be incompatible with GCC.
+      # ICC 10 doesn't accept -KPIC any more.
+      icc* | ifort*)
+	lt_prog_compiler_wl='-Wl,'
+	lt_prog_compiler_pic='-fPIC'
+	lt_prog_compiler_static='-static'
+        ;;
+      # Lahey Fortran 8.1.
+      lf95*)
+	lt_prog_compiler_wl='-Wl,'
+	lt_prog_compiler_pic='--shared'
+	lt_prog_compiler_static='--static'
+	;;
+      nagfor*)
+	# NAG Fortran compiler
+	lt_prog_compiler_wl='-Wl,-Wl,,'
+	lt_prog_compiler_pic='-PIC'
+	lt_prog_compiler_static='-Bstatic'
+	;;
+      tcc*)
+	# Fabrice Bellard et al's Tiny C Compiler
+	lt_prog_compiler_wl='-Wl,'
+	lt_prog_compiler_pic='-fPIC'
+	lt_prog_compiler_static='-static'
+	;;
+      pgcc* | pgf77* | pgf90* | pgf95* | pgfortran*)
+        # Portland Group compilers (*not* the Pentium gcc compiler,
+	# which looks to be a dead project)
+	lt_prog_compiler_wl='-Wl,'
+	lt_prog_compiler_pic='-fpic'
+	lt_prog_compiler_static='-Bstatic'
+        ;;
+      ccc*)
+        lt_prog_compiler_wl='-Wl,'
+        # All Alpha code is PIC.
+        lt_prog_compiler_static='-non_shared'
+        ;;
+      xl* | bgxl* | bgf* | mpixl*)
+	# IBM XL C 8.0/Fortran 10.1, 11.1 on PPC and BlueGene
+	lt_prog_compiler_wl='-Wl,'
+	lt_prog_compiler_pic='-qpic'
+	lt_prog_compiler_static='-qstaticlink'
+	;;
+      *)
+	case `$CC -V 2>&1 | sed 5q` in
+	*Sun\ Ceres\ Fortran* | *Sun*Fortran*\ [1-7].* | *Sun*Fortran*\ 8.[0-3]*)
+	  # Sun Fortran 8.3 passes all unrecognized flags to the linker
+	  lt_prog_compiler_pic='-KPIC'
+	  lt_prog_compiler_static='-Bstatic'
+	  lt_prog_compiler_wl=''
+	  ;;
+	*Sun\ F* | *Sun*Fortran*)
+	  lt_prog_compiler_pic='-KPIC'
+	  lt_prog_compiler_static='-Bstatic'
+	  lt_prog_compiler_wl='-Qoption ld '
+	  ;;
+	*Sun\ C*)
+	  # Sun C 5.9
+	  lt_prog_compiler_pic='-KPIC'
+	  lt_prog_compiler_static='-Bstatic'
+	  lt_prog_compiler_wl='-Wl,'
+	  ;;
+        *Intel*\ [CF]*Compiler*)
+	  lt_prog_compiler_wl='-Wl,'
+	  lt_prog_compiler_pic='-fPIC'
+	  lt_prog_compiler_static='-static'
+	  ;;
+	*Portland\ Group*)
+	  lt_prog_compiler_wl='-Wl,'
+	  lt_prog_compiler_pic='-fpic'
+	  lt_prog_compiler_static='-Bstatic'
+	  ;;
+	esac
+	;;
+      esac
+      ;;
+
+    newsos6)
+      lt_prog_compiler_pic='-KPIC'
+      lt_prog_compiler_static='-Bstatic'
+      ;;
+
+    *nto* | *qnx*)
+      # QNX uses GNU C++, but need to define -shared option too, otherwise
+      # it will coredump.
+      lt_prog_compiler_pic='-fPIC -shared'
+      ;;
+
+    osf3* | osf4* | osf5*)
+      lt_prog_compiler_wl='-Wl,'
+      # All OSF/1 code is PIC.
+      lt_prog_compiler_static='-non_shared'
+      ;;
+
+    rdos*)
+      lt_prog_compiler_static='-non_shared'
+      ;;
+
+    solaris*)
+      lt_prog_compiler_pic='-KPIC'
+      lt_prog_compiler_static='-Bstatic'
+      case $cc_basename in
+      f77* | f90* | f95* | sunf77* | sunf90* | sunf95*)
+	lt_prog_compiler_wl='-Qoption ld ';;
+      *)
+	lt_prog_compiler_wl='-Wl,';;
+      esac
+      ;;
+
+    sunos4*)
+      lt_prog_compiler_wl='-Qoption ld '
+      lt_prog_compiler_pic='-PIC'
+      lt_prog_compiler_static='-Bstatic'
+      ;;
+
+    sysv4 | sysv4.2uw2* | sysv4.3*)
+      lt_prog_compiler_wl='-Wl,'
+      lt_prog_compiler_pic='-KPIC'
+      lt_prog_compiler_static='-Bstatic'
+      ;;
+
+    sysv4*MP*)
+      if test -d /usr/nec; then
+	lt_prog_compiler_pic='-Kconform_pic'
+	lt_prog_compiler_static='-Bstatic'
+      fi
+      ;;
+
+    sysv5* | unixware* | sco3.2v5* | sco5v6* | OpenUNIX*)
+      lt_prog_compiler_wl='-Wl,'
+      lt_prog_compiler_pic='-KPIC'
+      lt_prog_compiler_static='-Bstatic'
+      ;;
+
+    unicos*)
+      lt_prog_compiler_wl='-Wl,'
+      lt_prog_compiler_can_build_shared=no
+      ;;
+
+    uts4*)
+      lt_prog_compiler_pic='-pic'
+      lt_prog_compiler_static='-Bstatic'
+      ;;
+
+    *)
+      lt_prog_compiler_can_build_shared=no
+      ;;
+    esac
+  fi
+
+case $host_os in
+  # For platforms that do not support PIC, -DPIC is meaningless:
+  *djgpp*)
+    lt_prog_compiler_pic=
+    ;;
+  *)
+    lt_prog_compiler_pic="$lt_prog_compiler_pic -DPIC"
+    ;;
+esac
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $compiler option to produce PIC" >&5
+$as_echo_n "checking for $compiler option to produce PIC... " >&6; }
+if ${lt_cv_prog_compiler_pic+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_prog_compiler_pic=$lt_prog_compiler_pic
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_pic" >&5
+$as_echo "$lt_cv_prog_compiler_pic" >&6; }
+lt_prog_compiler_pic=$lt_cv_prog_compiler_pic
+
+#
+# Check to make sure the PIC flag actually works.
+#
+if test -n "$lt_prog_compiler_pic"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $compiler PIC flag $lt_prog_compiler_pic works" >&5
+$as_echo_n "checking if $compiler PIC flag $lt_prog_compiler_pic works... " >&6; }
+if ${lt_cv_prog_compiler_pic_works+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_prog_compiler_pic_works=no
+   ac_outfile=conftest.$ac_objext
+   echo "$lt_simple_compile_test_code" > conftest.$ac_ext
+   lt_compiler_flag="$lt_prog_compiler_pic -DPIC"  ## exclude from sc_useless_quotes_in_assignment
+   # Insert the option either (1) after the last *FLAGS variable, or
+   # (2) before a word containing "conftest.", or (3) at the end.
+   # Note that $ac_compile itself does not contain backslashes and begins
+   # with a dollar sign (not a hyphen), so the echo should work correctly.
+   # The option is referenced via a variable to avoid confusing sed.
+   lt_compile=`echo "$ac_compile" | $SED \
+   -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
+   -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
+   -e 's:$: $lt_compiler_flag:'`
+   (eval echo "\"\$as_me:$LINENO: $lt_compile\"" >&5)
+   (eval "$lt_compile" 2>conftest.err)
+   ac_status=$?
+   cat conftest.err >&5
+   echo "$as_me:$LINENO: \$? = $ac_status" >&5
+   if (exit $ac_status) && test -s "$ac_outfile"; then
+     # The compiler can only warn and ignore the option if not recognized
+     # So say no if there are warnings other than the usual output.
+     $ECHO "$_lt_compiler_boilerplate" | $SED '/^$/d' >conftest.exp
+     $SED '/^$/d; /^ *+/d' conftest.err >conftest.er2
+     if test ! -s conftest.er2 || diff conftest.exp conftest.er2 >/dev/null; then
+       lt_cv_prog_compiler_pic_works=yes
+     fi
+   fi
+   $RM conftest*
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_pic_works" >&5
+$as_echo "$lt_cv_prog_compiler_pic_works" >&6; }
+
+if test yes = "$lt_cv_prog_compiler_pic_works"; then
+    case $lt_prog_compiler_pic in
+     "" | " "*) ;;
+     *) lt_prog_compiler_pic=" $lt_prog_compiler_pic" ;;
+     esac
+else
+    lt_prog_compiler_pic=
+     lt_prog_compiler_can_build_shared=no
+fi
+
+fi
+
+
+
+
+
+
+
+
+
+
+
+#
+# Check to make sure the static flag actually works.
+#
+wl=$lt_prog_compiler_wl eval lt_tmp_static_flag=\"$lt_prog_compiler_static\"
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if $compiler static flag $lt_tmp_static_flag works" >&5
+$as_echo_n "checking if $compiler static flag $lt_tmp_static_flag works... " >&6; }
+if ${lt_cv_prog_compiler_static_works+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_prog_compiler_static_works=no
+   save_LDFLAGS=$LDFLAGS
+   LDFLAGS="$LDFLAGS $lt_tmp_static_flag"
+   echo "$lt_simple_link_test_code" > conftest.$ac_ext
+   if (eval $ac_link 2>conftest.err) && test -s conftest$ac_exeext; then
+     # The linker can only warn and ignore the option if not recognized
+     # So say no if there are warnings
+     if test -s conftest.err; then
+       # Append any errors to the config.log.
+       cat conftest.err 1>&5
+       $ECHO "$_lt_linker_boilerplate" | $SED '/^$/d' > conftest.exp
+       $SED '/^$/d; /^ *+/d' conftest.err >conftest.er2
+       if diff conftest.exp conftest.er2 >/dev/null; then
+         lt_cv_prog_compiler_static_works=yes
+       fi
+     else
+       lt_cv_prog_compiler_static_works=yes
+     fi
+   fi
+   $RM -r conftest*
+   LDFLAGS=$save_LDFLAGS
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_static_works" >&5
+$as_echo "$lt_cv_prog_compiler_static_works" >&6; }
+
+if test yes = "$lt_cv_prog_compiler_static_works"; then
+    :
+else
+    lt_prog_compiler_static=
+fi
+
+
+
+
+
+
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $compiler supports -c -o file.$ac_objext" >&5
+$as_echo_n "checking if $compiler supports -c -o file.$ac_objext... " >&6; }
+if ${lt_cv_prog_compiler_c_o+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_prog_compiler_c_o=no
+   $RM -r conftest 2>/dev/null
+   mkdir conftest
+   cd conftest
+   mkdir out
+   echo "$lt_simple_compile_test_code" > conftest.$ac_ext
+
+   lt_compiler_flag="-o out/conftest2.$ac_objext"
+   # Insert the option either (1) after the last *FLAGS variable, or
+   # (2) before a word containing "conftest.", or (3) at the end.
+   # Note that $ac_compile itself does not contain backslashes and begins
+   # with a dollar sign (not a hyphen), so the echo should work correctly.
+   lt_compile=`echo "$ac_compile" | $SED \
+   -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
+   -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
+   -e 's:$: $lt_compiler_flag:'`
+   (eval echo "\"\$as_me:$LINENO: $lt_compile\"" >&5)
+   (eval "$lt_compile" 2>out/conftest.err)
+   ac_status=$?
+   cat out/conftest.err >&5
+   echo "$as_me:$LINENO: \$? = $ac_status" >&5
+   if (exit $ac_status) && test -s out/conftest2.$ac_objext
+   then
+     # The compiler can only warn and ignore the option if not recognized
+     # So say no if there are warnings
+     $ECHO "$_lt_compiler_boilerplate" | $SED '/^$/d' > out/conftest.exp
+     $SED '/^$/d; /^ *+/d' out/conftest.err >out/conftest.er2
+     if test ! -s out/conftest.er2 || diff out/conftest.exp out/conftest.er2 >/dev/null; then
+       lt_cv_prog_compiler_c_o=yes
+     fi
+   fi
+   chmod u+w . 2>&5
+   $RM conftest*
+   # SGI C++ compiler will create directory out/ii_files/ for
+   # template instantiation
+   test -d out/ii_files && $RM out/ii_files/* && rmdir out/ii_files
+   $RM out/* && rmdir out
+   cd ..
+   $RM -r conftest
+   $RM conftest*
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_c_o" >&5
+$as_echo "$lt_cv_prog_compiler_c_o" >&6; }
+
+
+
+
+
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $compiler supports -c -o file.$ac_objext" >&5
+$as_echo_n "checking if $compiler supports -c -o file.$ac_objext... " >&6; }
+if ${lt_cv_prog_compiler_c_o+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_prog_compiler_c_o=no
+   $RM -r conftest 2>/dev/null
+   mkdir conftest
+   cd conftest
+   mkdir out
+   echo "$lt_simple_compile_test_code" > conftest.$ac_ext
+
+   lt_compiler_flag="-o out/conftest2.$ac_objext"
+   # Insert the option either (1) after the last *FLAGS variable, or
+   # (2) before a word containing "conftest.", or (3) at the end.
+   # Note that $ac_compile itself does not contain backslashes and begins
+   # with a dollar sign (not a hyphen), so the echo should work correctly.
+   lt_compile=`echo "$ac_compile" | $SED \
+   -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
+   -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
+   -e 's:$: $lt_compiler_flag:'`
+   (eval echo "\"\$as_me:$LINENO: $lt_compile\"" >&5)
+   (eval "$lt_compile" 2>out/conftest.err)
+   ac_status=$?
+   cat out/conftest.err >&5
+   echo "$as_me:$LINENO: \$? = $ac_status" >&5
+   if (exit $ac_status) && test -s out/conftest2.$ac_objext
+   then
+     # The compiler can only warn and ignore the option if not recognized
+     # So say no if there are warnings
+     $ECHO "$_lt_compiler_boilerplate" | $SED '/^$/d' > out/conftest.exp
+     $SED '/^$/d; /^ *+/d' out/conftest.err >out/conftest.er2
+     if test ! -s out/conftest.er2 || diff out/conftest.exp out/conftest.er2 >/dev/null; then
+       lt_cv_prog_compiler_c_o=yes
+     fi
+   fi
+   chmod u+w . 2>&5
+   $RM conftest*
+   # SGI C++ compiler will create directory out/ii_files/ for
+   # template instantiation
+   test -d out/ii_files && $RM out/ii_files/* && rmdir out/ii_files
+   $RM out/* && rmdir out
+   cd ..
+   $RM -r conftest
+   $RM conftest*
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_c_o" >&5
+$as_echo "$lt_cv_prog_compiler_c_o" >&6; }
+
+
+
+
+hard_links=nottested
+if test no = "$lt_cv_prog_compiler_c_o" && test no != "$need_locks"; then
+  # do not overwrite the value of need_locks provided by the user
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if we can lock with hard links" >&5
+$as_echo_n "checking if we can lock with hard links... " >&6; }
+  hard_links=yes
+  $RM conftest*
+  ln conftest.a conftest.b 2>/dev/null && hard_links=no
+  touch conftest.a
+  ln conftest.a conftest.b 2>&5 || hard_links=no
+  ln conftest.a conftest.b 2>/dev/null && hard_links=no
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $hard_links" >&5
+$as_echo "$hard_links" >&6; }
+  if test no = "$hard_links"; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: '$CC' does not support '-c -o', so 'make -j' may be unsafe" >&5
+$as_echo "$as_me: WARNING: '$CC' does not support '-c -o', so 'make -j' may be unsafe" >&2;}
+    need_locks=warn
+  fi
+else
+  need_locks=no
+fi
+
+
+
+
+
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the $compiler linker ($LD) supports shared libraries" >&5
+$as_echo_n "checking whether the $compiler linker ($LD) supports shared libraries... " >&6; }
+
+  runpath_var=
+  allow_undefined_flag=
+  always_export_symbols=no
+  archive_cmds=
+  archive_expsym_cmds=
+  compiler_needs_object=no
+  enable_shared_with_static_runtimes=no
+  export_dynamic_flag_spec=
+  export_symbols_cmds='$NM $libobjs $convenience | $global_symbol_pipe | $SED '\''s/.* //'\'' | sort | uniq > $export_symbols'
+  hardcode_automatic=no
+  hardcode_direct=no
+  hardcode_direct_absolute=no
+  hardcode_libdir_flag_spec=
+  hardcode_libdir_separator=
+  hardcode_minus_L=no
+  hardcode_shlibpath_var=unsupported
+  inherit_rpath=no
+  link_all_deplibs=unknown
+  module_cmds=
+  module_expsym_cmds=
+  old_archive_from_new_cmds=
+  old_archive_from_expsyms_cmds=
+  thread_safe_flag_spec=
+  whole_archive_flag_spec=
+  # include_expsyms should be a list of space-separated symbols to be *always*
+  # included in the symbol list
+  include_expsyms=
+  # exclude_expsyms can be an extended regexp of symbols to exclude
+  # it will be wrapped by ' (' and ')$', so one must not match beginning or
+  # end of line.  Example: 'a|bc|.*d.*' will exclude the symbols 'a' and 'bc',
+  # as well as any symbol that contains 'd'.
+  exclude_expsyms='_GLOBAL_OFFSET_TABLE_|_GLOBAL__F[ID]_.*'
+  # Although _GLOBAL_OFFSET_TABLE_ is a valid symbol C name, most a.out
+  # platforms (ab)use it in PIC code, but their linkers get confused if
+  # the symbol is explicitly referenced.  Since portable code cannot
+  # rely on this symbol name, it's probably fine to never include it in
+  # preloaded symbol tables.
+  # Exclude shared library initialization/finalization symbols.
+  extract_expsyms_cmds=
+
+  case $host_os in
+  cygwin* | mingw* | pw32* | cegcc*)
+    # FIXME: the MSVC++ port hasn't been tested in a loooong time
+    # When not using gcc, we currently assume that we are using
+    # Microsoft Visual C++.
+    if test yes != "$GCC"; then
+      with_gnu_ld=no
+    fi
+    ;;
+  interix*)
+    # we just hope/assume this is gcc and not c89 (= MSVC++)
+    with_gnu_ld=yes
+    ;;
+  openbsd* | bitrig*)
+    with_gnu_ld=no
+    ;;
+  linux* | k*bsd*-gnu | gnu*)
+    link_all_deplibs=no
+    ;;
+  esac
+
+  ld_shlibs=yes
+
+  # On some targets, GNU ld is compatible enough with the native linker
+  # that we're better off using the native interface for both.
+  lt_use_gnu_ld_interface=no
+  if test yes = "$with_gnu_ld"; then
+    case $host_os in
+      aix*)
+	# The AIX port of GNU ld has always aspired to compatibility
+	# with the native linker.  However, as the warning in the GNU ld
+	# block says, versions before 2.19.5* couldn't really create working
+	# shared libraries, regardless of the interface used.
+	case `$LD -v 2>&1` in
+	  *\ \(GNU\ Binutils\)\ 2.19.5*) ;;
+	  *\ \(GNU\ Binutils\)\ 2.[2-9]*) ;;
+	  *\ \(GNU\ Binutils\)\ [3-9]*) ;;
+	  *)
+	    lt_use_gnu_ld_interface=yes
+	    ;;
+	esac
+	;;
+      *)
+	lt_use_gnu_ld_interface=yes
+	;;
+    esac
+  fi
+
+  if test yes = "$lt_use_gnu_ld_interface"; then
+    # If archive_cmds runs LD, not CC, wlarc should be empty
+    wlarc='$wl'
+
+    # Set some defaults for GNU ld with shared library support. These
+    # are reset later if shared libraries are not supported. Putting them
+    # here allows them to be overridden if necessary.
+    runpath_var=LD_RUN_PATH
+    hardcode_libdir_flag_spec='$wl-rpath $wl$libdir'
+    export_dynamic_flag_spec='$wl--export-dynamic'
+    # ancient GNU ld didn't support --whole-archive et. al.
+    if $LD --help 2>&1 | $GREP 'no-whole-archive' > /dev/null; then
+      whole_archive_flag_spec=$wlarc'--whole-archive$convenience '$wlarc'--no-whole-archive'
+    else
+      whole_archive_flag_spec=
+    fi
+    supports_anon_versioning=no
+    case `$LD -v | $SED -e 's/(^)\+)\s\+//' 2>&1` in
+      *GNU\ gold*) supports_anon_versioning=yes ;;
+      *\ [01].* | *\ 2.[0-9].* | *\ 2.10.*) ;; # catch versions < 2.11
+      *\ 2.11.93.0.2\ *) supports_anon_versioning=yes ;; # RH7.3 ...
+      *\ 2.11.92.0.12\ *) supports_anon_versioning=yes ;; # Mandrake 8.2 ...
+      *\ 2.11.*) ;; # other 2.11 versions
+      *) supports_anon_versioning=yes ;;
+    esac
+
+    # See if GNU ld supports shared libraries.
+    case $host_os in
+    aix[3-9]*)
+      # On AIX/PPC, the GNU linker is very broken
+      if test ia64 != "$host_cpu"; then
+	ld_shlibs=no
+	cat <<_LT_EOF 1>&2
+
+*** Warning: the GNU linker, at least up to release 2.19, is reported
+*** to be unable to reliably create shared libraries on AIX.
+*** Therefore, libtool is disabling shared libraries support.  If you
+*** really care for shared libraries, you may want to install binutils
+*** 2.20 or above, or modify your PATH so that a non-GNU linker is found.
+*** You will then need to restart the configuration process.
+
+_LT_EOF
+      fi
+      ;;
+
+    amigaos*)
+      case $host_cpu in
+      powerpc)
+            # see comment about AmigaOS4 .so support
+            archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib'
+            archive_expsym_cmds=''
+        ;;
+      m68k)
+            archive_cmds='$RM $output_objdir/a2ixlibrary.data~$ECHO "#define NAME $libname" > $output_objdir/a2ixlibrary.data~$ECHO "#define LIBRARY_ID 1" >> $output_objdir/a2ixlibrary.data~$ECHO "#define VERSION $major" >> $output_objdir/a2ixlibrary.data~$ECHO "#define REVISION $revision" >> $output_objdir/a2ixlibrary.data~$AR $AR_FLAGS $lib $libobjs~$RANLIB $lib~(cd $output_objdir && a2ixlibrary -32)'
+            hardcode_libdir_flag_spec='-L$libdir'
+            hardcode_minus_L=yes
+        ;;
+      esac
+      ;;
+
+    beos*)
+      if $LD --help 2>&1 | $GREP ': supported targets:.* elf' > /dev/null; then
+	allow_undefined_flag=unsupported
+	# Joseph Beckenbach <jrb3@best.com> says some releases of gcc
+	# support --undefined.  This deserves some investigation.  FIXME
+	archive_cmds='$CC -nostart $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib'
+      else
+	ld_shlibs=no
+      fi
+      ;;
+
+    cygwin* | mingw* | pw32* | cegcc*)
+      # _LT_TAGVAR(hardcode_libdir_flag_spec, ) is actually meaningless,
+      # as there is no search path for DLLs.
+      hardcode_libdir_flag_spec='-L$libdir'
+      export_dynamic_flag_spec='$wl--export-all-symbols'
+      allow_undefined_flag=unsupported
+      always_export_symbols=no
+      enable_shared_with_static_runtimes=yes
+      export_symbols_cmds='$NM $libobjs $convenience | $global_symbol_pipe | $SED -e '\''/^[BCDGRS][ ]/s/.*[ ]\([^ ]*\)/\1 DATA/;s/^.*[ ]__nm__\([^ ]*\)[ ][^ ]*/\1 DATA/;/^I[ ]/d;/^[AITW][ ]/s/.* //'\'' | sort | uniq > $export_symbols'
+      exclude_expsyms='[_]+GLOBAL_OFFSET_TABLE_|[_]+GLOBAL__[FID]_.*|[_]+head_[A-Za-z0-9_]+_dll|[A-Za-z0-9_]+_dll_iname'
+
+      if $LD --help 2>&1 | $GREP 'auto-import' > /dev/null; then
+        archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags -o $output_objdir/$soname $wl--enable-auto-image-base -Xlinker --out-implib -Xlinker $lib'
+	# If the export-symbols file already is a .def file, use it as
+	# is; otherwise, prepend EXPORTS...
+	archive_expsym_cmds='if   test DEF = "`$SED -n     -e '\''s/^[	 ]*//'\''     -e '\''/^\(;.*\)*$/d'\''     -e '\''s/^\(EXPORTS\|LIBRARY\)\([	 ].*\)*$/DEF/p'\''     -e q     $export_symbols`" ; then
+          cp $export_symbols $output_objdir/$soname.def;
+        else
+          echo EXPORTS > $output_objdir/$soname.def;
+          cat $export_symbols >> $output_objdir/$soname.def;
+        fi~
+        $CC -shared $output_objdir/$soname.def $libobjs $deplibs $compiler_flags -o $output_objdir/$soname $wl--enable-auto-image-base -Xlinker --out-implib -Xlinker $lib'
+      else
+	ld_shlibs=no
+      fi
+      ;;
+
+    haiku*)
+      archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib'
+      link_all_deplibs=yes
+      ;;
+
+    os2*)
+      hardcode_libdir_flag_spec='-L$libdir'
+      hardcode_minus_L=yes
+      allow_undefined_flag=unsupported
+      shrext_cmds=.dll
+      archive_cmds='$ECHO "LIBRARY ${soname%$shared_ext} INITINSTANCE TERMINSTANCE" > $output_objdir/$libname.def~
+	$ECHO "DESCRIPTION \"$libname\"" >> $output_objdir/$libname.def~
+	$ECHO "DATA MULTIPLE NONSHARED" >> $output_objdir/$libname.def~
+	$ECHO EXPORTS >> $output_objdir/$libname.def~
+	emxexp $libobjs | $SED /"_DLL_InitTerm"/d >> $output_objdir/$libname.def~
+	$CC -Zdll -Zcrtdll -o $output_objdir/$soname $libobjs $deplibs $compiler_flags $output_objdir/$libname.def~
+	emximp -o $lib $output_objdir/$libname.def'
+      archive_expsym_cmds='$ECHO "LIBRARY ${soname%$shared_ext} INITINSTANCE TERMINSTANCE" > $output_objdir/$libname.def~
+	$ECHO "DESCRIPTION \"$libname\"" >> $output_objdir/$libname.def~
+	$ECHO "DATA MULTIPLE NONSHARED" >> $output_objdir/$libname.def~
+	$ECHO EXPORTS >> $output_objdir/$libname.def~
+	prefix_cmds="$SED"~
+	if test EXPORTS = "`$SED 1q $export_symbols`"; then
+	  prefix_cmds="$prefix_cmds -e 1d";
+	fi~
+	prefix_cmds="$prefix_cmds -e \"s/^\(.*\)$/_\1/g\""~
+	cat $export_symbols | $prefix_cmds >> $output_objdir/$libname.def~
+	$CC -Zdll -Zcrtdll -o $output_objdir/$soname $libobjs $deplibs $compiler_flags $output_objdir/$libname.def~
+	emximp -o $lib $output_objdir/$libname.def'
+      old_archive_From_new_cmds='emximp -o $output_objdir/${libname}_dll.a $output_objdir/$libname.def'
+      enable_shared_with_static_runtimes=yes
+      ;;
+
+    interix[3-9]*)
+      hardcode_direct=no
+      hardcode_shlibpath_var=no
+      hardcode_libdir_flag_spec='$wl-rpath,$libdir'
+      export_dynamic_flag_spec='$wl-E'
+      # Hack: On Interix 3.x, we cannot compile PIC because of a broken gcc.
+      # Instead, shared libraries are loaded at an image base (0x10000000 by
+      # default) and relocated if they conflict, which is a slow very memory
+      # consuming and fragmenting process.  To avoid this, we pick a random,
+      # 256 KiB-aligned image base between 0x50000000 and 0x6FFC0000 at link
+      # time.  Moving up from 0x10000000 also allows more sbrk(2) space.
+      archive_cmds='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-h,$soname $wl--image-base,`expr ${RANDOM-$$} % 4096 / 2 \* 262144 + 1342177280` -o $lib'
+      archive_expsym_cmds='sed "s|^|_|" $export_symbols >$output_objdir/$soname.expsym~$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-h,$soname $wl--retain-symbols-file,$output_objdir/$soname.expsym $wl--image-base,`expr ${RANDOM-$$} % 4096 / 2 \* 262144 + 1342177280` -o $lib'
+      ;;
+
+    gnu* | linux* | tpf* | k*bsd*-gnu | kopensolaris*-gnu)
+      tmp_diet=no
+      if test linux-dietlibc = "$host_os"; then
+	case $cc_basename in
+	  diet\ *) tmp_diet=yes;;	# linux-dietlibc with static linking (!diet-dyn)
+	esac
+      fi
+      if $LD --help 2>&1 | $EGREP ': supported targets:.* elf' > /dev/null \
+	 && test no = "$tmp_diet"
+      then
+	tmp_addflag=' $pic_flag'
+	tmp_sharedflag='-shared'
+	case $cc_basename,$host_cpu in
+        pgcc*)				# Portland Group C compiler
+	  whole_archive_flag_spec='$wl--whole-archive`for conv in $convenience\"\"; do test  -n \"$conv\" && new_convenience=\"$new_convenience,$conv\"; done; func_echo_all \"$new_convenience\"` $wl--no-whole-archive'
+	  tmp_addflag=' $pic_flag'
+	  ;;
+	pgf77* | pgf90* | pgf95* | pgfortran*)
+					# Portland Group f77 and f90 compilers
+	  whole_archive_flag_spec='$wl--whole-archive`for conv in $convenience\"\"; do test  -n \"$conv\" && new_convenience=\"$new_convenience,$conv\"; done; func_echo_all \"$new_convenience\"` $wl--no-whole-archive'
+	  tmp_addflag=' $pic_flag -Mnomain' ;;
+	ecc*,ia64* | icc*,ia64*)	# Intel C compiler on ia64
+	  tmp_addflag=' -i_dynamic' ;;
+	efc*,ia64* | ifort*,ia64*)	# Intel Fortran compiler on ia64
+	  tmp_addflag=' -i_dynamic -nofor_main' ;;
+	ifc* | ifort*)			# Intel Fortran compiler
+	  tmp_addflag=' -nofor_main' ;;
+	lf95*)				# Lahey Fortran 8.1
+	  whole_archive_flag_spec=
+	  tmp_sharedflag='--shared' ;;
+        nagfor*)                        # NAGFOR 5.3
+          tmp_sharedflag='-Wl,-shared' ;;
+	xl[cC]* | bgxl[cC]* | mpixl[cC]*) # IBM XL C 8.0 on PPC (deal with xlf below)
+	  tmp_sharedflag='-qmkshrobj'
+	  tmp_addflag= ;;
+	nvcc*)	# Cuda Compiler Driver 2.2
+	  whole_archive_flag_spec='$wl--whole-archive`for conv in $convenience\"\"; do test  -n \"$conv\" && new_convenience=\"$new_convenience,$conv\"; done; func_echo_all \"$new_convenience\"` $wl--no-whole-archive'
+	  compiler_needs_object=yes
+	  ;;
+	esac
+	case `$CC -V 2>&1 | sed 5q` in
+	*Sun\ C*)			# Sun C 5.9
+	  whole_archive_flag_spec='$wl--whole-archive`new_convenience=; for conv in $convenience\"\"; do test -z \"$conv\" || new_convenience=\"$new_convenience,$conv\"; done; func_echo_all \"$new_convenience\"` $wl--no-whole-archive'
+	  compiler_needs_object=yes
+	  tmp_sharedflag='-G' ;;
+	*Sun\ F*)			# Sun Fortran 8.3
+	  tmp_sharedflag='-G' ;;
+	esac
+	archive_cmds='$CC '"$tmp_sharedflag""$tmp_addflag"' $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib'
+
+        if test yes = "$supports_anon_versioning"; then
+          archive_expsym_cmds='echo "{ global:" > $output_objdir/$libname.ver~
+            cat $export_symbols | sed -e "s/\(.*\)/\1;/" >> $output_objdir/$libname.ver~
+            echo "local: *; };" >> $output_objdir/$libname.ver~
+            $CC '"$tmp_sharedflag""$tmp_addflag"' $libobjs $deplibs $compiler_flags $wl-soname $wl$soname $wl-version-script $wl$output_objdir/$libname.ver -o $lib'
+        fi
+
+	case $cc_basename in
+	tcc*)
+	  export_dynamic_flag_spec='-rdynamic'
+	  ;;
+	xlf* | bgf* | bgxlf* | mpixlf*)
+	  # IBM XL Fortran 10.1 on PPC cannot create shared libs itself
+	  whole_archive_flag_spec='--whole-archive$convenience --no-whole-archive'
+	  hardcode_libdir_flag_spec='$wl-rpath $wl$libdir'
+	  archive_cmds='$LD -shared $libobjs $deplibs $linker_flags -soname $soname -o $lib'
+	  if test yes = "$supports_anon_versioning"; then
+	    archive_expsym_cmds='echo "{ global:" > $output_objdir/$libname.ver~
+              cat $export_symbols | sed -e "s/\(.*\)/\1;/" >> $output_objdir/$libname.ver~
+              echo "local: *; };" >> $output_objdir/$libname.ver~
+              $LD -shared $libobjs $deplibs $linker_flags -soname $soname -version-script $output_objdir/$libname.ver -o $lib'
+	  fi
+	  ;;
+	esac
+      else
+        ld_shlibs=no
+      fi
+      ;;
+
+    netbsd* | netbsdelf*-gnu)
+      if echo __ELF__ | $CC -E - | $GREP __ELF__ >/dev/null; then
+	archive_cmds='$LD -Bshareable $libobjs $deplibs $linker_flags -o $lib'
+	wlarc=
+      else
+	archive_cmds='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib'
+	archive_expsym_cmds='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname $wl-retain-symbols-file $wl$export_symbols -o $lib'
+      fi
+      ;;
+
+    solaris*)
+      if $LD -v 2>&1 | $GREP 'BFD 2\.8' > /dev/null; then
+	ld_shlibs=no
+	cat <<_LT_EOF 1>&2
+
+*** Warning: The releases 2.8.* of the GNU linker cannot reliably
+*** create shared libraries on Solaris systems.  Therefore, libtool
+*** is disabling shared libraries support.  We urge you to upgrade GNU
+*** binutils to release 2.9.1 or newer.  Another option is to modify
+*** your PATH or compiler configuration so that the native linker is
+*** used, and then restart.
+
+_LT_EOF
+      elif $LD --help 2>&1 | $GREP ': supported targets:.* elf' > /dev/null; then
+	archive_cmds='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib'
+	archive_expsym_cmds='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname $wl-retain-symbols-file $wl$export_symbols -o $lib'
+      else
+	ld_shlibs=no
+      fi
+      ;;
+
+    sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX*)
+      case `$LD -v 2>&1` in
+        *\ [01].* | *\ 2.[0-9].* | *\ 2.1[0-5].*)
+	ld_shlibs=no
+	cat <<_LT_EOF 1>&2
+
+*** Warning: Releases of the GNU linker prior to 2.16.91.0.3 cannot
+*** reliably create shared libraries on SCO systems.  Therefore, libtool
+*** is disabling shared libraries support.  We urge you to upgrade GNU
+*** binutils to release 2.16.91.0.3 or newer.  Another option is to modify
+*** your PATH or compiler configuration so that the native linker is
+*** used, and then restart.
+
+_LT_EOF
+	;;
+	*)
+	  # For security reasons, it is highly recommended that you always
+	  # use absolute paths for naming shared libraries, and exclude the
+	  # DT_RUNPATH tag from executables and libraries.  But doing so
+	  # requires that you compile everything twice, which is a pain.
+	  if $LD --help 2>&1 | $GREP ': supported targets:.* elf' > /dev/null; then
+	    hardcode_libdir_flag_spec='$wl-rpath $wl$libdir'
+	    archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib'
+	    archive_expsym_cmds='$CC -shared $libobjs $deplibs $compiler_flags $wl-soname $wl$soname $wl-retain-symbols-file $wl$export_symbols -o $lib'
+	  else
+	    ld_shlibs=no
+	  fi
+	;;
+      esac
+      ;;
+
+    sunos4*)
+      archive_cmds='$LD -assert pure-text -Bshareable -o $lib $libobjs $deplibs $linker_flags'
+      wlarc=
+      hardcode_direct=yes
+      hardcode_shlibpath_var=no
+      ;;
+
+    *)
+      if $LD --help 2>&1 | $GREP ': supported targets:.* elf' > /dev/null; then
+	archive_cmds='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib'
+	archive_expsym_cmds='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname $wl-retain-symbols-file $wl$export_symbols -o $lib'
+      else
+	ld_shlibs=no
+      fi
+      ;;
+    esac
+
+    if test no = "$ld_shlibs"; then
+      runpath_var=
+      hardcode_libdir_flag_spec=
+      export_dynamic_flag_spec=
+      whole_archive_flag_spec=
+    fi
+  else
+    # PORTME fill in a description of your system's linker (not GNU ld)
+    case $host_os in
+    aix3*)
+      allow_undefined_flag=unsupported
+      always_export_symbols=yes
+      archive_expsym_cmds='$LD -o $output_objdir/$soname $libobjs $deplibs $linker_flags -bE:$export_symbols -T512 -H512 -bM:SRE~$AR $AR_FLAGS $lib $output_objdir/$soname'
+      # Note: this linker hardcodes the directories in LIBPATH if there
+      # are no directories specified by -L.
+      hardcode_minus_L=yes
+      if test yes = "$GCC" && test -z "$lt_prog_compiler_static"; then
+	# Neither direct hardcoding nor static linking is supported with a
+	# broken collect2.
+	hardcode_direct=unsupported
+      fi
+      ;;
+
+    aix[4-9]*)
+      if test ia64 = "$host_cpu"; then
+	# On IA64, the linker does run time linking by default, so we don't
+	# have to do anything special.
+	aix_use_runtimelinking=no
+	exp_sym_flag='-Bexport'
+	no_entry_flag=
+      else
+	# If we're using GNU nm, then we don't want the "-C" option.
+	# -C means demangle to GNU nm, but means don't demangle to AIX nm.
+	# Without the "-l" option, or with the "-B" option, AIX nm treats
+	# weak defined symbols like other global defined symbols, whereas
+	# GNU nm marks them as "W".
+	# While the 'weak' keyword is ignored in the Export File, we need
+	# it in the Import File for the 'aix-soname' feature, so we have
+	# to replace the "-B" option with "-P" for AIX nm.
+	if $NM -V 2>&1 | $GREP 'GNU' > /dev/null; then
+	  export_symbols_cmds='$NM -Bpg $libobjs $convenience | awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B") || (\$ 2 == "W")) && (substr(\$ 3,1,1) != ".")) { if (\$ 2 == "W") { print \$ 3 " weak" } else { print \$ 3 } } }'\'' | sort -u > $export_symbols'
+	else
+	  export_symbols_cmds='`func_echo_all $NM | $SED -e '\''s/B\([^B]*\)$/P\1/'\''` -PCpgl $libobjs $convenience | awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B") || (\$ 2 == "W") || (\$ 2 == "V") || (\$ 2 == "Z")) && (substr(\$ 1,1,1) != ".")) { if ((\$ 2 == "W") || (\$ 2 == "V") || (\$ 2 == "Z")) { print \$ 1 " weak" } else { print \$ 1 } } }'\'' | sort -u > $export_symbols'
+	fi
+	aix_use_runtimelinking=no
+
+	# Test if we are trying to use run time linking or normal
+	# AIX style linking. If -brtl is somewhere in LDFLAGS, we
+	# have runtime linking enabled, and use it for executables.
+	# For shared libraries, we enable/disable runtime linking
+	# depending on the kind of the shared library created -
+	# when "with_aix_soname,aix_use_runtimelinking" is:
+	# "aix,no"   lib.a(lib.so.V) shared, rtl:no,  for executables
+	# "aix,yes"  lib.so          shared, rtl:yes, for executables
+	#            lib.a           static archive
+	# "both,no"  lib.so.V(shr.o) shared, rtl:yes
+	#            lib.a(lib.so.V) shared, rtl:no,  for executables
+	# "both,yes" lib.so.V(shr.o) shared, rtl:yes, for executables
+	#            lib.a(lib.so.V) shared, rtl:no
+	# "svr4,*"   lib.so.V(shr.o) shared, rtl:yes, for executables
+	#            lib.a           static archive
+	case $host_os in aix4.[23]|aix4.[23].*|aix[5-9]*)
+	  for ld_flag in $LDFLAGS; do
+	  if (test x-brtl = "x$ld_flag" || test x-Wl,-brtl = "x$ld_flag"); then
+	    aix_use_runtimelinking=yes
+	    break
+	  fi
+	  done
+	  if test svr4,no = "$with_aix_soname,$aix_use_runtimelinking"; then
+	    # With aix-soname=svr4, we create the lib.so.V shared archives only,
+	    # so we don't have lib.a shared libs to link our executables.
+	    # We have to force runtime linking in this case.
+	    aix_use_runtimelinking=yes
+	    LDFLAGS="$LDFLAGS -Wl,-brtl"
+	  fi
+	  ;;
+	esac
+
+	exp_sym_flag='-bexport'
+	no_entry_flag='-bnoentry'
+      fi
+
+      # When large executables or shared objects are built, AIX ld can
+      # have problems creating the table of contents.  If linking a library
+      # or program results in "error TOC overflow" add -mminimal-toc to
+      # CXXFLAGS/CFLAGS for g++/gcc.  In the cases where that is not
+      # enough to fix the problem, add -Wl,-bbigtoc to LDFLAGS.
+
+      archive_cmds=''
+      hardcode_direct=yes
+      hardcode_direct_absolute=yes
+      hardcode_libdir_separator=':'
+      link_all_deplibs=yes
+      file_list_spec='$wl-f,'
+      case $with_aix_soname,$aix_use_runtimelinking in
+      aix,*) ;; # traditional, no import file
+      svr4,* | *,yes) # use import file
+	# The Import File defines what to hardcode.
+	hardcode_direct=no
+	hardcode_direct_absolute=no
+	;;
+      esac
+
+      if test yes = "$GCC"; then
+	case $host_os in aix4.[012]|aix4.[012].*)
+	# We only want to do this on AIX 4.2 and lower, the check
+	# below for broken collect2 doesn't work under 4.3+
+	  collect2name=`$CC -print-prog-name=collect2`
+	  if test -f "$collect2name" &&
+	   strings "$collect2name" | $GREP resolve_lib_name >/dev/null
+	  then
+	  # We have reworked collect2
+	  :
+	  else
+	  # We have old collect2
+	  hardcode_direct=unsupported
+	  # It fails to find uninstalled libraries when the uninstalled
+	  # path is not listed in the libpath.  Setting hardcode_minus_L
+	  # to unsupported forces relinking
+	  hardcode_minus_L=yes
+	  hardcode_libdir_flag_spec='-L$libdir'
+	  hardcode_libdir_separator=
+	  fi
+	  ;;
+	esac
+	shared_flag='-shared'
+	if test yes = "$aix_use_runtimelinking"; then
+	  shared_flag="$shared_flag "'$wl-G'
+	fi
+	# Need to ensure runtime linking is disabled for the traditional
+	# shared library, or the linker may eventually find shared libraries
+	# /with/ Import File - we do not want to mix them.
+	shared_flag_aix='-shared'
+	shared_flag_svr4='-shared $wl-G'
+      else
+	# not using gcc
+	if test ia64 = "$host_cpu"; then
+	# VisualAge C++, Version 5.5 for AIX 5L for IA-64, Beta 3 Release
+	# chokes on -Wl,-G. The following line is correct:
+	  shared_flag='-G'
+	else
+	  if test yes = "$aix_use_runtimelinking"; then
+	    shared_flag='$wl-G'
+	  else
+	    shared_flag='$wl-bM:SRE'
+	  fi
+	  shared_flag_aix='$wl-bM:SRE'
+	  shared_flag_svr4='$wl-G'
+	fi
+      fi
+
+      export_dynamic_flag_spec='$wl-bexpall'
+      # It seems that -bexpall does not export symbols beginning with
+      # underscore (_), so it is better to generate a list of symbols to export.
+      always_export_symbols=yes
+      if test aix,yes = "$with_aix_soname,$aix_use_runtimelinking"; then
+	# Warning - without using the other runtime loading flags (-brtl),
+	# -berok will link without error, but may produce a broken library.
+	allow_undefined_flag='-berok'
+        # Determine the default libpath from the value encoded in an
+        # empty executable.
+        if test set = "${lt_cv_aix_libpath+set}"; then
+  aix_libpath=$lt_cv_aix_libpath
+else
+  if ${lt_cv_aix_libpath_+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+
+  lt_aix_libpath_sed='
+      /Import File Strings/,/^$/ {
+	  /^0/ {
+	      s/^0  *\([^ ]*\) *$/\1/
+	      p
+	  }
+      }'
+  lt_cv_aix_libpath_=`dump -H conftest$ac_exeext 2>/dev/null | $SED -n -e "$lt_aix_libpath_sed"`
+  # Check for a 64-bit object if we didn't find anything.
+  if test -z "$lt_cv_aix_libpath_"; then
+    lt_cv_aix_libpath_=`dump -HX64 conftest$ac_exeext 2>/dev/null | $SED -n -e "$lt_aix_libpath_sed"`
+  fi
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+  if test -z "$lt_cv_aix_libpath_"; then
+    lt_cv_aix_libpath_=/usr/lib:/lib
+  fi
+
+fi
+
+  aix_libpath=$lt_cv_aix_libpath_
+fi
+
+        hardcode_libdir_flag_spec='$wl-blibpath:$libdir:'"$aix_libpath"
+        archive_expsym_cmds='$CC -o $output_objdir/$soname $libobjs $deplibs $wl'$no_entry_flag' $compiler_flags `if test -n "$allow_undefined_flag"; then func_echo_all "$wl$allow_undefined_flag"; else :; fi` $wl'$exp_sym_flag:\$export_symbols' '$shared_flag
+      else
+	if test ia64 = "$host_cpu"; then
+	  hardcode_libdir_flag_spec='$wl-R $libdir:/usr/lib:/lib'
+	  allow_undefined_flag="-z nodefs"
+	  archive_expsym_cmds="\$CC $shared_flag"' -o $output_objdir/$soname $libobjs $deplibs '"\$wl$no_entry_flag"' $compiler_flags $wl$allow_undefined_flag '"\$wl$exp_sym_flag:\$export_symbols"
+	else
+	 # Determine the default libpath from the value encoded in an
+	 # empty executable.
+	 if test set = "${lt_cv_aix_libpath+set}"; then
+  aix_libpath=$lt_cv_aix_libpath
+else
+  if ${lt_cv_aix_libpath_+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+
+  lt_aix_libpath_sed='
+      /Import File Strings/,/^$/ {
+	  /^0/ {
+	      s/^0  *\([^ ]*\) *$/\1/
+	      p
+	  }
+      }'
+  lt_cv_aix_libpath_=`dump -H conftest$ac_exeext 2>/dev/null | $SED -n -e "$lt_aix_libpath_sed"`
+  # Check for a 64-bit object if we didn't find anything.
+  if test -z "$lt_cv_aix_libpath_"; then
+    lt_cv_aix_libpath_=`dump -HX64 conftest$ac_exeext 2>/dev/null | $SED -n -e "$lt_aix_libpath_sed"`
+  fi
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+  if test -z "$lt_cv_aix_libpath_"; then
+    lt_cv_aix_libpath_=/usr/lib:/lib
+  fi
+
+fi
+
+  aix_libpath=$lt_cv_aix_libpath_
+fi
+
+	 hardcode_libdir_flag_spec='$wl-blibpath:$libdir:'"$aix_libpath"
+	  # Warning - without using the other run time loading flags,
+	  # -berok will link without error, but may produce a broken library.
+	  no_undefined_flag=' $wl-bernotok'
+	  allow_undefined_flag=' $wl-berok'
+	  if test yes = "$with_gnu_ld"; then
+	    # We only use this code for GNU lds that support --whole-archive.
+	    whole_archive_flag_spec='$wl--whole-archive$convenience $wl--no-whole-archive'
+	  else
+	    # Exported symbols can be pulled into shared objects from archives
+	    whole_archive_flag_spec='$convenience'
+	  fi
+	  archive_cmds_need_lc=yes
+	  archive_expsym_cmds='$RM -r $output_objdir/$realname.d~$MKDIR $output_objdir/$realname.d'
+	  # -brtl affects multiple linker settings, -berok does not and is overridden later
+	  compiler_flags_filtered='`func_echo_all "$compiler_flags " | $SED -e "s%-brtl\\([, ]\\)%-berok\\1%g"`'
+	  if test svr4 != "$with_aix_soname"; then
+	    # This is similar to how AIX traditionally builds its shared libraries.
+	    archive_expsym_cmds="$archive_expsym_cmds"'~$CC '$shared_flag_aix' -o $output_objdir/$realname.d/$soname $libobjs $deplibs $wl-bnoentry '$compiler_flags_filtered'$wl-bE:$export_symbols$allow_undefined_flag~$AR $AR_FLAGS $output_objdir/$libname$release.a $output_objdir/$realname.d/$soname'
+	  fi
+	  if test aix != "$with_aix_soname"; then
+	    archive_expsym_cmds="$archive_expsym_cmds"'~$CC '$shared_flag_svr4' -o $output_objdir/$realname.d/$shared_archive_member_spec.o $libobjs $deplibs $wl-bnoentry '$compiler_flags_filtered'$wl-bE:$export_symbols$allow_undefined_flag~$STRIP -e $output_objdir/$realname.d/$shared_archive_member_spec.o~( func_echo_all "#! $soname($shared_archive_member_spec.o)"; if test shr_64 = "$shared_archive_member_spec"; then func_echo_all "# 64"; else func_echo_all "# 32"; fi; cat $export_symbols ) > $output_objdir/$realname.d/$shared_archive_member_spec.imp~$AR $AR_FLAGS $output_objdir/$soname $output_objdir/$realname.d/$shared_archive_member_spec.o $output_objdir/$realname.d/$shared_archive_member_spec.imp'
+	  else
+	    # used by -dlpreopen to get the symbols
+	    archive_expsym_cmds="$archive_expsym_cmds"'~$MV  $output_objdir/$realname.d/$soname $output_objdir'
+	  fi
+	  archive_expsym_cmds="$archive_expsym_cmds"'~$RM -r $output_objdir/$realname.d'
+	fi
+      fi
+      ;;
+
+    amigaos*)
+      case $host_cpu in
+      powerpc)
+            # see comment about AmigaOS4 .so support
+            archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib'
+            archive_expsym_cmds=''
+        ;;
+      m68k)
+            archive_cmds='$RM $output_objdir/a2ixlibrary.data~$ECHO "#define NAME $libname" > $output_objdir/a2ixlibrary.data~$ECHO "#define LIBRARY_ID 1" >> $output_objdir/a2ixlibrary.data~$ECHO "#define VERSION $major" >> $output_objdir/a2ixlibrary.data~$ECHO "#define REVISION $revision" >> $output_objdir/a2ixlibrary.data~$AR $AR_FLAGS $lib $libobjs~$RANLIB $lib~(cd $output_objdir && a2ixlibrary -32)'
+            hardcode_libdir_flag_spec='-L$libdir'
+            hardcode_minus_L=yes
+        ;;
+      esac
+      ;;
+
+    bsdi[45]*)
+      export_dynamic_flag_spec=-rdynamic
+      ;;
+
+    cygwin* | mingw* | pw32* | cegcc*)
+      # When not using gcc, we currently assume that we are using
+      # Microsoft Visual C++.
+      # hardcode_libdir_flag_spec is actually meaningless, as there is
+      # no search path for DLLs.
+      case $cc_basename in
+      cl*)
+	# Native MSVC
+	hardcode_libdir_flag_spec=' '
+	allow_undefined_flag=unsupported
+	always_export_symbols=yes
+	file_list_spec='@'
+	# Tell ltmain to make .lib files, not .a files.
+	libext=lib
+	# Tell ltmain to make .dll files, not .so files.
+	shrext_cmds=.dll
+	# FIXME: Setting linknames here is a bad hack.
+	archive_cmds='$CC -o $output_objdir/$soname $libobjs $compiler_flags $deplibs -Wl,-DLL,-IMPLIB:"$tool_output_objdir$libname.dll.lib"~linknames='
+	archive_expsym_cmds='if   test DEF = "`$SED -n     -e '\''s/^[	 ]*//'\''     -e '\''/^\(;.*\)*$/d'\''     -e '\''s/^\(EXPORTS\|LIBRARY\)\([	 ].*\)*$/DEF/p'\''     -e q     $export_symbols`" ; then
+            cp "$export_symbols" "$output_objdir/$soname.def";
+            echo "$tool_output_objdir$soname.def" > "$output_objdir/$soname.exp";
+          else
+            $SED -e '\''s/^/-link -EXPORT:/'\'' < $export_symbols > $output_objdir/$soname.exp;
+          fi~
+          $CC -o $tool_output_objdir$soname $libobjs $compiler_flags $deplibs "@$tool_output_objdir$soname.exp" -Wl,-DLL,-IMPLIB:"$tool_output_objdir$libname.dll.lib"~
+          linknames='
+	# The linker will not automatically build a static lib if we build a DLL.
+	# _LT_TAGVAR(old_archive_from_new_cmds, )='true'
+	enable_shared_with_static_runtimes=yes
+	exclude_expsyms='_NULL_IMPORT_DESCRIPTOR|_IMPORT_DESCRIPTOR_.*'
+	export_symbols_cmds='$NM $libobjs $convenience | $global_symbol_pipe | $SED -e '\''/^[BCDGRS][ ]/s/.*[ ]\([^ ]*\)/\1,DATA/'\'' | $SED -e '\''/^[AITW][ ]/s/.*[ ]//'\'' | sort | uniq > $export_symbols'
+	# Don't use ranlib
+	old_postinstall_cmds='chmod 644 $oldlib'
+	postlink_cmds='lt_outputfile="@OUTPUT@"~
+          lt_tool_outputfile="@TOOL_OUTPUT@"~
+          case $lt_outputfile in
+            *.exe|*.EXE) ;;
+            *)
+              lt_outputfile=$lt_outputfile.exe
+              lt_tool_outputfile=$lt_tool_outputfile.exe
+              ;;
+          esac~
+          if test : != "$MANIFEST_TOOL" && test -f "$lt_outputfile.manifest"; then
+            $MANIFEST_TOOL -manifest "$lt_tool_outputfile.manifest" -outputresource:"$lt_tool_outputfile" || exit 1;
+            $RM "$lt_outputfile.manifest";
+          fi'
+	;;
+      *)
+	# Assume MSVC wrapper
+	hardcode_libdir_flag_spec=' '
+	allow_undefined_flag=unsupported
+	# Tell ltmain to make .lib files, not .a files.
+	libext=lib
+	# Tell ltmain to make .dll files, not .so files.
+	shrext_cmds=.dll
+	# FIXME: Setting linknames here is a bad hack.
+	archive_cmds='$CC -o $lib $libobjs $compiler_flags `func_echo_all "$deplibs" | $SED '\''s/ -lc$//'\''` -link -dll~linknames='
+	# The linker will automatically build a .lib file if we build a DLL.
+	old_archive_from_new_cmds='true'
+	# FIXME: Should let the user specify the lib program.
+	old_archive_cmds='lib -OUT:$oldlib$oldobjs$old_deplibs'
+	enable_shared_with_static_runtimes=yes
+	;;
+      esac
+      ;;
+
+    darwin* | rhapsody*)
+
+
+  archive_cmds_need_lc=no
+  hardcode_direct=no
+  hardcode_automatic=yes
+  hardcode_shlibpath_var=unsupported
+  if test yes = "$lt_cv_ld_force_load"; then
+    whole_archive_flag_spec='`for conv in $convenience\"\"; do test  -n \"$conv\" && new_convenience=\"$new_convenience $wl-force_load,$conv\"; done; func_echo_all \"$new_convenience\"`'
+
+  else
+    whole_archive_flag_spec=''
+  fi
+  link_all_deplibs=yes
+  allow_undefined_flag=$_lt_dar_allow_undefined
+  case $cc_basename in
+     ifort*|nagfor*) _lt_dar_can_shared=yes ;;
+     *) _lt_dar_can_shared=$GCC ;;
+  esac
+  if test yes = "$_lt_dar_can_shared"; then
+    output_verbose_link_cmd=func_echo_all
+    archive_cmds="\$CC -dynamiclib \$allow_undefined_flag -o \$lib \$libobjs \$deplibs \$compiler_flags -install_name \$rpath/\$soname \$verstring $_lt_dar_single_mod$_lt_dsymutil"
+    module_cmds="\$CC \$allow_undefined_flag -o \$lib -bundle \$libobjs \$deplibs \$compiler_flags$_lt_dsymutil"
+    archive_expsym_cmds="sed 's|^|_|' < \$export_symbols > \$output_objdir/\$libname-symbols.expsym~\$CC -dynamiclib \$allow_undefined_flag -o \$lib \$libobjs \$deplibs \$compiler_flags -install_name \$rpath/\$soname \$verstring $_lt_dar_single_mod$_lt_dar_export_syms$_lt_dsymutil"
+    module_expsym_cmds="sed -e 's|^|_|' < \$export_symbols > \$output_objdir/\$libname-symbols.expsym~\$CC \$allow_undefined_flag -o \$lib -bundle \$libobjs \$deplibs \$compiler_flags$_lt_dar_export_syms$_lt_dsymutil"
+
+  else
+  ld_shlibs=no
+  fi
+
+      ;;
+
+    dgux*)
+      archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+      hardcode_libdir_flag_spec='-L$libdir'
+      hardcode_shlibpath_var=no
+      ;;
+
+    # FreeBSD 2.2.[012] allows us to include c++rt0.o to get C++ constructor
+    # support.  Future versions do this automatically, but an explicit c++rt0.o
+    # does not break anything, and helps significantly (at the cost of a little
+    # extra space).
+    freebsd2.2*)
+      archive_cmds='$LD -Bshareable -o $lib $libobjs $deplibs $linker_flags /usr/lib/c++rt0.o'
+      hardcode_libdir_flag_spec='-R$libdir'
+      hardcode_direct=yes
+      hardcode_shlibpath_var=no
+      ;;
+
+    # Unfortunately, older versions of FreeBSD 2 do not have this feature.
+    freebsd2.*)
+      archive_cmds='$LD -Bshareable -o $lib $libobjs $deplibs $linker_flags'
+      hardcode_direct=yes
+      hardcode_minus_L=yes
+      hardcode_shlibpath_var=no
+      ;;
+
+    # FreeBSD 3 and greater uses gcc -shared to do shared libraries.
+    freebsd* | dragonfly*)
+      archive_cmds='$CC -shared $pic_flag -o $lib $libobjs $deplibs $compiler_flags'
+      hardcode_libdir_flag_spec='-R$libdir'
+      hardcode_direct=yes
+      hardcode_shlibpath_var=no
+      ;;
+
+    hpux9*)
+      if test yes = "$GCC"; then
+	archive_cmds='$RM $output_objdir/$soname~$CC -shared $pic_flag $wl+b $wl$install_libdir -o $output_objdir/$soname $libobjs $deplibs $compiler_flags~test "x$output_objdir/$soname" = "x$lib" || mv $output_objdir/$soname $lib'
+      else
+	archive_cmds='$RM $output_objdir/$soname~$LD -b +b $install_libdir -o $output_objdir/$soname $libobjs $deplibs $linker_flags~test "x$output_objdir/$soname" = "x$lib" || mv $output_objdir/$soname $lib'
+      fi
+      hardcode_libdir_flag_spec='$wl+b $wl$libdir'
+      hardcode_libdir_separator=:
+      hardcode_direct=yes
+
+      # hardcode_minus_L: Not really in the search PATH,
+      # but as the default location of the library.
+      hardcode_minus_L=yes
+      export_dynamic_flag_spec='$wl-E'
+      ;;
+
+    hpux10*)
+      if test yes,no = "$GCC,$with_gnu_ld"; then
+	archive_cmds='$CC -shared $pic_flag $wl+h $wl$soname $wl+b $wl$install_libdir -o $lib $libobjs $deplibs $compiler_flags'
+      else
+	archive_cmds='$LD -b +h $soname +b $install_libdir -o $lib $libobjs $deplibs $linker_flags'
+      fi
+      if test no = "$with_gnu_ld"; then
+	hardcode_libdir_flag_spec='$wl+b $wl$libdir'
+	hardcode_libdir_separator=:
+	hardcode_direct=yes
+	hardcode_direct_absolute=yes
+	export_dynamic_flag_spec='$wl-E'
+	# hardcode_minus_L: Not really in the search PATH,
+	# but as the default location of the library.
+	hardcode_minus_L=yes
+      fi
+      ;;
+
+    hpux11*)
+      if test yes,no = "$GCC,$with_gnu_ld"; then
+	case $host_cpu in
+	hppa*64*)
+	  archive_cmds='$CC -shared $wl+h $wl$soname -o $lib $libobjs $deplibs $compiler_flags'
+	  ;;
+	ia64*)
+	  archive_cmds='$CC -shared $pic_flag $wl+h $wl$soname $wl+nodefaultrpath -o $lib $libobjs $deplibs $compiler_flags'
+	  ;;
+	*)
+	  archive_cmds='$CC -shared $pic_flag $wl+h $wl$soname $wl+b $wl$install_libdir -o $lib $libobjs $deplibs $compiler_flags'
+	  ;;
+	esac
+      else
+	case $host_cpu in
+	hppa*64*)
+	  archive_cmds='$CC -b $wl+h $wl$soname -o $lib $libobjs $deplibs $compiler_flags'
+	  ;;
+	ia64*)
+	  archive_cmds='$CC -b $wl+h $wl$soname $wl+nodefaultrpath -o $lib $libobjs $deplibs $compiler_flags'
+	  ;;
+	*)
+
+	  # Older versions of the 11.00 compiler do not understand -b yet
+	  # (HP92453-01 A.11.01.20 doesn't, HP92453-01 B.11.X.35175-35176.GP does)
+	  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $CC understands -b" >&5
+$as_echo_n "checking if $CC understands -b... " >&6; }
+if ${lt_cv_prog_compiler__b+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_prog_compiler__b=no
+   save_LDFLAGS=$LDFLAGS
+   LDFLAGS="$LDFLAGS -b"
+   echo "$lt_simple_link_test_code" > conftest.$ac_ext
+   if (eval $ac_link 2>conftest.err) && test -s conftest$ac_exeext; then
+     # The linker can only warn and ignore the option if not recognized
+     # So say no if there are warnings
+     if test -s conftest.err; then
+       # Append any errors to the config.log.
+       cat conftest.err 1>&5
+       $ECHO "$_lt_linker_boilerplate" | $SED '/^$/d' > conftest.exp
+       $SED '/^$/d; /^ *+/d' conftest.err >conftest.er2
+       if diff conftest.exp conftest.er2 >/dev/null; then
+         lt_cv_prog_compiler__b=yes
+       fi
+     else
+       lt_cv_prog_compiler__b=yes
+     fi
+   fi
+   $RM -r conftest*
+   LDFLAGS=$save_LDFLAGS
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler__b" >&5
+$as_echo "$lt_cv_prog_compiler__b" >&6; }
+
+if test yes = "$lt_cv_prog_compiler__b"; then
+    archive_cmds='$CC -b $wl+h $wl$soname $wl+b $wl$install_libdir -o $lib $libobjs $deplibs $compiler_flags'
+else
+    archive_cmds='$LD -b +h $soname +b $install_libdir -o $lib $libobjs $deplibs $linker_flags'
+fi
+
+	  ;;
+	esac
+      fi
+      if test no = "$with_gnu_ld"; then
+	hardcode_libdir_flag_spec='$wl+b $wl$libdir'
+	hardcode_libdir_separator=:
+
+	case $host_cpu in
+	hppa*64*|ia64*)
+	  hardcode_direct=no
+	  hardcode_shlibpath_var=no
+	  ;;
+	*)
+	  hardcode_direct=yes
+	  hardcode_direct_absolute=yes
+	  export_dynamic_flag_spec='$wl-E'
+
+	  # hardcode_minus_L: Not really in the search PATH,
+	  # but as the default location of the library.
+	  hardcode_minus_L=yes
+	  ;;
+	esac
+      fi
+      ;;
+
+    irix5* | irix6* | nonstopux*)
+      if test yes = "$GCC"; then
+	archive_cmds='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname `test -n "$verstring" && func_echo_all "$wl-set_version $wl$verstring"` $wl-update_registry $wl$output_objdir/so_locations -o $lib'
+	# Try to use the -exported_symbol ld option, if it does not
+	# work, assume that -exports_file does not work either and
+	# implicitly export all symbols.
+	# This should be the same for all languages, so no per-tag cache variable.
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the $host_os linker accepts -exported_symbol" >&5
+$as_echo_n "checking whether the $host_os linker accepts -exported_symbol... " >&6; }
+if ${lt_cv_irix_exported_symbol+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  save_LDFLAGS=$LDFLAGS
+	   LDFLAGS="$LDFLAGS -shared $wl-exported_symbol ${wl}foo $wl-update_registry $wl/dev/null"
+	   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+int foo (void) { return 0; }
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  lt_cv_irix_exported_symbol=yes
+else
+  lt_cv_irix_exported_symbol=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+           LDFLAGS=$save_LDFLAGS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_irix_exported_symbol" >&5
+$as_echo "$lt_cv_irix_exported_symbol" >&6; }
+	if test yes = "$lt_cv_irix_exported_symbol"; then
+          archive_expsym_cmds='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname `test -n "$verstring" && func_echo_all "$wl-set_version $wl$verstring"` $wl-update_registry $wl$output_objdir/so_locations $wl-exports_file $wl$export_symbols -o $lib'
+	fi
+	link_all_deplibs=no
+      else
+	archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags -soname $soname `test -n "$verstring" && func_echo_all "-set_version $verstring"` -update_registry $output_objdir/so_locations -o $lib'
+	archive_expsym_cmds='$CC -shared $libobjs $deplibs $compiler_flags -soname $soname `test -n "$verstring" && func_echo_all "-set_version $verstring"` -update_registry $output_objdir/so_locations -exports_file $export_symbols -o $lib'
+      fi
+      archive_cmds_need_lc='no'
+      hardcode_libdir_flag_spec='$wl-rpath $wl$libdir'
+      hardcode_libdir_separator=:
+      inherit_rpath=yes
+      link_all_deplibs=yes
+      ;;
+
+    linux*)
+      case $cc_basename in
+      tcc*)
+	# Fabrice Bellard et al's Tiny C Compiler
+	ld_shlibs=yes
+	archive_cmds='$CC -shared $pic_flag -o $lib $libobjs $deplibs $compiler_flags'
+	;;
+      esac
+      ;;
+
+    netbsd* | netbsdelf*-gnu)
+      if echo __ELF__ | $CC -E - | $GREP __ELF__ >/dev/null; then
+	archive_cmds='$LD -Bshareable -o $lib $libobjs $deplibs $linker_flags'  # a.out
+      else
+	archive_cmds='$LD -shared -o $lib $libobjs $deplibs $linker_flags'      # ELF
+      fi
+      hardcode_libdir_flag_spec='-R$libdir'
+      hardcode_direct=yes
+      hardcode_shlibpath_var=no
+      ;;
+
+    newsos6)
+      archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+      hardcode_direct=yes
+      hardcode_libdir_flag_spec='$wl-rpath $wl$libdir'
+      hardcode_libdir_separator=:
+      hardcode_shlibpath_var=no
+      ;;
+
+    *nto* | *qnx*)
+      ;;
+
+    openbsd* | bitrig*)
+      if test -f /usr/libexec/ld.so; then
+	hardcode_direct=yes
+	hardcode_shlibpath_var=no
+	hardcode_direct_absolute=yes
+	if test -z "`echo __ELF__ | $CC -E - | $GREP __ELF__`"; then
+	  archive_cmds='$CC -shared $pic_flag -o $lib $libobjs $deplibs $compiler_flags'
+	  archive_expsym_cmds='$CC -shared $pic_flag -o $lib $libobjs $deplibs $compiler_flags $wl-retain-symbols-file,$export_symbols'
+	  hardcode_libdir_flag_spec='$wl-rpath,$libdir'
+	  export_dynamic_flag_spec='$wl-E'
+	else
+	  archive_cmds='$CC -shared $pic_flag -o $lib $libobjs $deplibs $compiler_flags'
+	  hardcode_libdir_flag_spec='$wl-rpath,$libdir'
+	fi
+      else
+	ld_shlibs=no
+      fi
+      ;;
+
+    os2*)
+      hardcode_libdir_flag_spec='-L$libdir'
+      hardcode_minus_L=yes
+      allow_undefined_flag=unsupported
+      shrext_cmds=.dll
+      archive_cmds='$ECHO "LIBRARY ${soname%$shared_ext} INITINSTANCE TERMINSTANCE" > $output_objdir/$libname.def~
+	$ECHO "DESCRIPTION \"$libname\"" >> $output_objdir/$libname.def~
+	$ECHO "DATA MULTIPLE NONSHARED" >> $output_objdir/$libname.def~
+	$ECHO EXPORTS >> $output_objdir/$libname.def~
+	emxexp $libobjs | $SED /"_DLL_InitTerm"/d >> $output_objdir/$libname.def~
+	$CC -Zdll -Zcrtdll -o $output_objdir/$soname $libobjs $deplibs $compiler_flags $output_objdir/$libname.def~
+	emximp -o $lib $output_objdir/$libname.def'
+      archive_expsym_cmds='$ECHO "LIBRARY ${soname%$shared_ext} INITINSTANCE TERMINSTANCE" > $output_objdir/$libname.def~
+	$ECHO "DESCRIPTION \"$libname\"" >> $output_objdir/$libname.def~
+	$ECHO "DATA MULTIPLE NONSHARED" >> $output_objdir/$libname.def~
+	$ECHO EXPORTS >> $output_objdir/$libname.def~
+	prefix_cmds="$SED"~
+	if test EXPORTS = "`$SED 1q $export_symbols`"; then
+	  prefix_cmds="$prefix_cmds -e 1d";
+	fi~
+	prefix_cmds="$prefix_cmds -e \"s/^\(.*\)$/_\1/g\""~
+	cat $export_symbols | $prefix_cmds >> $output_objdir/$libname.def~
+	$CC -Zdll -Zcrtdll -o $output_objdir/$soname $libobjs $deplibs $compiler_flags $output_objdir/$libname.def~
+	emximp -o $lib $output_objdir/$libname.def'
+      old_archive_From_new_cmds='emximp -o $output_objdir/${libname}_dll.a $output_objdir/$libname.def'
+      enable_shared_with_static_runtimes=yes
+      ;;
+
+    osf3*)
+      if test yes = "$GCC"; then
+	allow_undefined_flag=' $wl-expect_unresolved $wl\*'
+	archive_cmds='$CC -shared$allow_undefined_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname `test -n "$verstring" && func_echo_all "$wl-set_version $wl$verstring"` $wl-update_registry $wl$output_objdir/so_locations -o $lib'
+      else
+	allow_undefined_flag=' -expect_unresolved \*'
+	archive_cmds='$CC -shared$allow_undefined_flag $libobjs $deplibs $compiler_flags -soname $soname `test -n "$verstring" && func_echo_all "-set_version $verstring"` -update_registry $output_objdir/so_locations -o $lib'
+      fi
+      archive_cmds_need_lc='no'
+      hardcode_libdir_flag_spec='$wl-rpath $wl$libdir'
+      hardcode_libdir_separator=:
+      ;;
+
+    osf4* | osf5*)	# as osf3* with the addition of -msym flag
+      if test yes = "$GCC"; then
+	allow_undefined_flag=' $wl-expect_unresolved $wl\*'
+	archive_cmds='$CC -shared$allow_undefined_flag $pic_flag $libobjs $deplibs $compiler_flags $wl-msym $wl-soname $wl$soname `test -n "$verstring" && func_echo_all "$wl-set_version $wl$verstring"` $wl-update_registry $wl$output_objdir/so_locations -o $lib'
+	hardcode_libdir_flag_spec='$wl-rpath $wl$libdir'
+      else
+	allow_undefined_flag=' -expect_unresolved \*'
+	archive_cmds='$CC -shared$allow_undefined_flag $libobjs $deplibs $compiler_flags -msym -soname $soname `test -n "$verstring" && func_echo_all "-set_version $verstring"` -update_registry $output_objdir/so_locations -o $lib'
+	archive_expsym_cmds='for i in `cat $export_symbols`; do printf "%s %s\\n" -exported_symbol "\$i" >> $lib.exp; done; printf "%s\\n" "-hidden">> $lib.exp~
+          $CC -shared$allow_undefined_flag $wl-input $wl$lib.exp $compiler_flags $libobjs $deplibs -soname $soname `test -n "$verstring" && $ECHO "-set_version $verstring"` -update_registry $output_objdir/so_locations -o $lib~$RM $lib.exp'
+
+	# Both c and cxx compiler support -rpath directly
+	hardcode_libdir_flag_spec='-rpath $libdir'
+      fi
+      archive_cmds_need_lc='no'
+      hardcode_libdir_separator=:
+      ;;
+
+    solaris*)
+      no_undefined_flag=' -z defs'
+      if test yes = "$GCC"; then
+	wlarc='$wl'
+	archive_cmds='$CC -shared $pic_flag $wl-z ${wl}text $wl-h $wl$soname -o $lib $libobjs $deplibs $compiler_flags'
+	archive_expsym_cmds='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~
+          $CC -shared $pic_flag $wl-z ${wl}text $wl-M $wl$lib.exp $wl-h $wl$soname -o $lib $libobjs $deplibs $compiler_flags~$RM $lib.exp'
+      else
+	case `$CC -V 2>&1` in
+	*"Compilers 5.0"*)
+	  wlarc=''
+	  archive_cmds='$LD -G$allow_undefined_flag -h $soname -o $lib $libobjs $deplibs $linker_flags'
+	  archive_expsym_cmds='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~
+            $LD -G$allow_undefined_flag -M $lib.exp -h $soname -o $lib $libobjs $deplibs $linker_flags~$RM $lib.exp'
+	  ;;
+	*)
+	  wlarc='$wl'
+	  archive_cmds='$CC -G$allow_undefined_flag -h $soname -o $lib $libobjs $deplibs $compiler_flags'
+	  archive_expsym_cmds='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~
+            $CC -G$allow_undefined_flag -M $lib.exp -h $soname -o $lib $libobjs $deplibs $compiler_flags~$RM $lib.exp'
+	  ;;
+	esac
+      fi
+      hardcode_libdir_flag_spec='-R$libdir'
+      hardcode_shlibpath_var=no
+      case $host_os in
+      solaris2.[0-5] | solaris2.[0-5].*) ;;
+      *)
+	# The compiler driver will combine and reorder linker options,
+	# but understands '-z linker_flag'.  GCC discards it without '$wl',
+	# but is careful enough not to reorder.
+	# Supported since Solaris 2.6 (maybe 2.5.1?)
+	if test yes = "$GCC"; then
+	  whole_archive_flag_spec='$wl-z ${wl}allextract$convenience $wl-z ${wl}defaultextract'
+	else
+	  whole_archive_flag_spec='-z allextract$convenience -z defaultextract'
+	fi
+	;;
+      esac
+      link_all_deplibs=yes
+      ;;
+
+    sunos4*)
+      if test sequent = "$host_vendor"; then
+	# Use $CC to link under sequent, because it throws in some extra .o
+	# files that make .init and .fini sections work.
+	archive_cmds='$CC -G $wl-h $soname -o $lib $libobjs $deplibs $compiler_flags'
+      else
+	archive_cmds='$LD -assert pure-text -Bstatic -o $lib $libobjs $deplibs $linker_flags'
+      fi
+      hardcode_libdir_flag_spec='-L$libdir'
+      hardcode_direct=yes
+      hardcode_minus_L=yes
+      hardcode_shlibpath_var=no
+      ;;
+
+    sysv4)
+      case $host_vendor in
+	sni)
+	  archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+	  hardcode_direct=yes # is this really true???
+	;;
+	siemens)
+	  ## LD is ld it makes a PLAMLIB
+	  ## CC just makes a GrossModule.
+	  archive_cmds='$LD -G -o $lib $libobjs $deplibs $linker_flags'
+	  reload_cmds='$CC -r -o $output$reload_objs'
+	  hardcode_direct=no
+        ;;
+	motorola)
+	  archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+	  hardcode_direct=no #Motorola manual says yes, but my tests say they lie
+	;;
+      esac
+      runpath_var='LD_RUN_PATH'
+      hardcode_shlibpath_var=no
+      ;;
+
+    sysv4.3*)
+      archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+      hardcode_shlibpath_var=no
+      export_dynamic_flag_spec='-Bexport'
+      ;;
+
+    sysv4*MP*)
+      if test -d /usr/nec; then
+	archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+	hardcode_shlibpath_var=no
+	runpath_var=LD_RUN_PATH
+	hardcode_runpath_var=yes
+	ld_shlibs=yes
+      fi
+      ;;
+
+    sysv4*uw2* | sysv5OpenUNIX* | sysv5UnixWare7.[01].[10]* | unixware7* | sco3.2v5.0.[024]*)
+      no_undefined_flag='$wl-z,text'
+      archive_cmds_need_lc=no
+      hardcode_shlibpath_var=no
+      runpath_var='LD_RUN_PATH'
+
+      if test yes = "$GCC"; then
+	archive_cmds='$CC -shared $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	archive_expsym_cmds='$CC -shared $wl-Bexport:$export_symbols $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+      else
+	archive_cmds='$CC -G $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	archive_expsym_cmds='$CC -G $wl-Bexport:$export_symbols $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+      fi
+      ;;
+
+    sysv5* | sco3.2v5* | sco5v6*)
+      # Note: We CANNOT use -z defs as we might desire, because we do not
+      # link with -lc, and that would cause any symbols used from libc to
+      # always be unresolved, which means just about no library would
+      # ever link correctly.  If we're not using GNU ld we use -z text
+      # though, which does catch some bad symbols but isn't as heavy-handed
+      # as -z defs.
+      no_undefined_flag='$wl-z,text'
+      allow_undefined_flag='$wl-z,nodefs'
+      archive_cmds_need_lc=no
+      hardcode_shlibpath_var=no
+      hardcode_libdir_flag_spec='$wl-R,$libdir'
+      hardcode_libdir_separator=':'
+      link_all_deplibs=yes
+      export_dynamic_flag_spec='$wl-Bexport'
+      runpath_var='LD_RUN_PATH'
+
+      if test yes = "$GCC"; then
+	archive_cmds='$CC -shared $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	archive_expsym_cmds='$CC -shared $wl-Bexport:$export_symbols $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+      else
+	archive_cmds='$CC -G $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	archive_expsym_cmds='$CC -G $wl-Bexport:$export_symbols $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+      fi
+      ;;
+
+    uts4*)
+      archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+      hardcode_libdir_flag_spec='-L$libdir'
+      hardcode_shlibpath_var=no
+      ;;
+
+    *)
+      ld_shlibs=no
+      ;;
+    esac
+
+    if test sni = "$host_vendor"; then
+      case $host in
+      sysv4 | sysv4.2uw2* | sysv4.3* | sysv5*)
+	export_dynamic_flag_spec='$wl-Blargedynsym'
+	;;
+      esac
+    fi
+  fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ld_shlibs" >&5
+$as_echo "$ld_shlibs" >&6; }
+test no = "$ld_shlibs" && can_build_shared=no
+
+with_gnu_ld=$with_gnu_ld
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+#
+# Do we need to explicitly link libc?
+#
+case "x$archive_cmds_need_lc" in
+x|xyes)
+  # Assume -lc should be added
+  archive_cmds_need_lc=yes
+
+  if test yes,yes = "$GCC,$enable_shared"; then
+    case $archive_cmds in
+    *'~'*)
+      # FIXME: we may have to deal with multi-command sequences.
+      ;;
+    '$CC '*)
+      # Test whether the compiler implicitly links with -lc since on some
+      # systems, -lgcc has to come before -lc. If gcc already passes -lc
+      # to ld, don't add -lc before -lgcc.
+      { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether -lc should be explicitly linked in" >&5
+$as_echo_n "checking whether -lc should be explicitly linked in... " >&6; }
+if ${lt_cv_archive_cmds_need_lc+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  $RM conftest*
+	echo "$lt_simple_compile_test_code" > conftest.$ac_ext
+
+	if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } 2>conftest.err; then
+	  soname=conftest
+	  lib=conftest
+	  libobjs=conftest.$ac_objext
+	  deplibs=
+	  wl=$lt_prog_compiler_wl
+	  pic_flag=$lt_prog_compiler_pic
+	  compiler_flags=-v
+	  linker_flags=-v
+	  verstring=
+	  output_objdir=.
+	  libname=conftest
+	  lt_save_allow_undefined_flag=$allow_undefined_flag
+	  allow_undefined_flag=
+	  if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$archive_cmds 2\>\&1 \| $GREP \" -lc \" \>/dev/null 2\>\&1\""; } >&5
+  (eval $archive_cmds 2\>\&1 \| $GREP \" -lc \" \>/dev/null 2\>\&1) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+	  then
+	    lt_cv_archive_cmds_need_lc=no
+	  else
+	    lt_cv_archive_cmds_need_lc=yes
+	  fi
+	  allow_undefined_flag=$lt_save_allow_undefined_flag
+	else
+	  cat conftest.err 1>&5
+	fi
+	$RM conftest*
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_archive_cmds_need_lc" >&5
+$as_echo "$lt_cv_archive_cmds_need_lc" >&6; }
+      archive_cmds_need_lc=$lt_cv_archive_cmds_need_lc
+      ;;
+    esac
+  fi
+  ;;
+esac
+
+
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+
+
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking dynamic linker characteristics" >&5
+$as_echo_n "checking dynamic linker characteristics... " >&6; }
+
+if test yes = "$GCC"; then
+  case $host_os in
+    darwin*) lt_awk_arg='/^libraries:/,/LR/' ;;
+    *) lt_awk_arg='/^libraries:/' ;;
+  esac
+  case $host_os in
+    mingw* | cegcc*) lt_sed_strip_eq='s|=\([A-Za-z]:\)|\1|g' ;;
+    *) lt_sed_strip_eq='s|=/|/|g' ;;
+  esac
+  lt_search_path_spec=`$CC -print-search-dirs | awk $lt_awk_arg | $SED -e "s/^libraries://" -e $lt_sed_strip_eq`
+  case $lt_search_path_spec in
+  *\;*)
+    # if the path contains ";" then we assume it to be the separator
+    # otherwise default to the standard path separator (i.e. ":") - it is
+    # assumed that no part of a normal pathname contains ";" but that should
+    # okay in the real world where ";" in dirpaths is itself problematic.
+    lt_search_path_spec=`$ECHO "$lt_search_path_spec" | $SED 's/;/ /g'`
+    ;;
+  *)
+    lt_search_path_spec=`$ECHO "$lt_search_path_spec" | $SED "s/$PATH_SEPARATOR/ /g"`
+    ;;
+  esac
+  # Ok, now we have the path, separated by spaces, we can step through it
+  # and add multilib dir if necessary...
+  lt_tmp_lt_search_path_spec=
+  lt_multi_os_dir=/`$CC $CPPFLAGS $CFLAGS $LDFLAGS -print-multi-os-directory 2>/dev/null`
+  # ...but if some path component already ends with the multilib dir we assume
+  # that all is fine and trust -print-search-dirs as is (GCC 4.2? or newer).
+  case "$lt_multi_os_dir; $lt_search_path_spec " in
+  "/; "* | "/.; "* | "/./; "* | *"$lt_multi_os_dir "* | *"$lt_multi_os_dir/ "*)
+    lt_multi_os_dir=
+    ;;
+  esac
+  for lt_sys_path in $lt_search_path_spec; do
+    if test -d "$lt_sys_path$lt_multi_os_dir"; then
+      lt_tmp_lt_search_path_spec="$lt_tmp_lt_search_path_spec $lt_sys_path$lt_multi_os_dir"
+    elif test -n "$lt_multi_os_dir"; then
+      test -d "$lt_sys_path" && \
+	lt_tmp_lt_search_path_spec="$lt_tmp_lt_search_path_spec $lt_sys_path"
+    fi
+  done
+  lt_search_path_spec=`$ECHO "$lt_tmp_lt_search_path_spec" | awk '
+BEGIN {RS = " "; FS = "/|\n";} {
+  lt_foo = "";
+  lt_count = 0;
+  for (lt_i = NF; lt_i > 0; lt_i--) {
+    if ($lt_i != "" && $lt_i != ".") {
+      if ($lt_i == "..") {
+        lt_count++;
+      } else {
+        if (lt_count == 0) {
+          lt_foo = "/" $lt_i lt_foo;
+        } else {
+          lt_count--;
+        }
+      }
+    }
+  }
+  if (lt_foo != "") { lt_freq[lt_foo]++; }
+  if (lt_freq[lt_foo] == 1) { print lt_foo; }
+}'`
+  # AWK program above erroneously prepends '/' to C:/dos/paths
+  # for these hosts.
+  case $host_os in
+    mingw* | cegcc*) lt_search_path_spec=`$ECHO "$lt_search_path_spec" |\
+      $SED 's|/\([A-Za-z]:\)|\1|g'` ;;
+  esac
+  sys_lib_search_path_spec=`$ECHO "$lt_search_path_spec" | $lt_NL2SP`
+else
+  sys_lib_search_path_spec="/lib /usr/lib /usr/local/lib"
+fi
+library_names_spec=
+libname_spec='lib$name'
+soname_spec=
+shrext_cmds=.so
+postinstall_cmds=
+postuninstall_cmds=
+finish_cmds=
+finish_eval=
+shlibpath_var=
+shlibpath_overrides_runpath=unknown
+version_type=none
+dynamic_linker="$host_os ld.so"
+sys_lib_dlsearch_path_spec="/lib /usr/lib"
+need_lib_prefix=unknown
+hardcode_into_libs=no
+
+# when you set need_version to no, make sure it does not cause -set_version
+# flags to be left without arguments
+need_version=unknown
+
+
+
+case $host_os in
+aix3*)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  library_names_spec='$libname$release$shared_ext$versuffix $libname.a'
+  shlibpath_var=LIBPATH
+
+  # AIX 3 has no versioning support, so we append a major version to the name.
+  soname_spec='$libname$release$shared_ext$major'
+  ;;
+
+aix[4-9]*)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  need_lib_prefix=no
+  need_version=no
+  hardcode_into_libs=yes
+  if test ia64 = "$host_cpu"; then
+    # AIX 5 supports IA64
+    library_names_spec='$libname$release$shared_ext$major $libname$release$shared_ext$versuffix $libname$shared_ext'
+    shlibpath_var=LD_LIBRARY_PATH
+  else
+    # With GCC up to 2.95.x, collect2 would create an import file
+    # for dependence libraries.  The import file would start with
+    # the line '#! .'.  This would cause the generated library to
+    # depend on '.', always an invalid library.  This was fixed in
+    # development snapshots of GCC prior to 3.0.
+    case $host_os in
+      aix4 | aix4.[01] | aix4.[01].*)
+      if { echo '#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 97)'
+	   echo ' yes '
+	   echo '#endif'; } | $CC -E - | $GREP yes > /dev/null; then
+	:
+      else
+	can_build_shared=no
+      fi
+      ;;
+    esac
+    # Using Import Files as archive members, it is possible to support
+    # filename-based versioning of shared library archives on AIX. While
+    # this would work for both with and without runtime linking, it will
+    # prevent static linking of such archives. So we do filename-based
+    # shared library versioning with .so extension only, which is used
+    # when both runtime linking and shared linking is enabled.
+    # Unfortunately, runtime linking may impact performance, so we do
+    # not want this to be the default eventually. Also, we use the
+    # versioned .so libs for executables only if there is the -brtl
+    # linker flag in LDFLAGS as well, or --with-aix-soname=svr4 only.
+    # To allow for filename-based versioning support, we need to create
+    # libNAME.so.V as an archive file, containing:
+    # *) an Import File, referring to the versioned filename of the
+    #    archive as well as the shared archive member, telling the
+    #    bitwidth (32 or 64) of that shared object, and providing the
+    #    list of exported symbols of that shared object, eventually
+    #    decorated with the 'weak' keyword
+    # *) the shared object with the F_LOADONLY flag set, to really avoid
+    #    it being seen by the linker.
+    # At run time we better use the real file rather than another symlink,
+    # but for link time we create the symlink libNAME.so -> libNAME.so.V
+
+    case $with_aix_soname,$aix_use_runtimelinking in
+    # AIX (on Power*) has no versioning support, so currently we cannot hardcode correct
+    # soname into executable. Probably we can add versioning support to
+    # collect2, so additional links can be useful in future.
+    aix,yes) # traditional libtool
+      dynamic_linker='AIX unversionable lib.so'
+      # If using run time linking (on AIX 4.2 or later) use lib<name>.so
+      # instead of lib<name>.a to let people know that these are not
+      # typical AIX shared libraries.
+      library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+      ;;
+    aix,no) # traditional AIX only
+      dynamic_linker='AIX lib.a(lib.so.V)'
+      # We preserve .a as extension for shared libraries through AIX4.2
+      # and later when we are not doing run time linking.
+      library_names_spec='$libname$release.a $libname.a'
+      soname_spec='$libname$release$shared_ext$major'
+      ;;
+    svr4,*) # full svr4 only
+      dynamic_linker="AIX lib.so.V($shared_archive_member_spec.o)"
+      library_names_spec='$libname$release$shared_ext$major $libname$shared_ext'
+      # We do not specify a path in Import Files, so LIBPATH fires.
+      shlibpath_overrides_runpath=yes
+      ;;
+    *,yes) # both, prefer svr4
+      dynamic_linker="AIX lib.so.V($shared_archive_member_spec.o), lib.a(lib.so.V)"
+      library_names_spec='$libname$release$shared_ext$major $libname$shared_ext'
+      # unpreferred sharedlib libNAME.a needs extra handling
+      postinstall_cmds='test -n "$linkname" || linkname="$realname"~func_stripname "" ".so" "$linkname"~$install_shared_prog "$dir/$func_stripname_result.$libext" "$destdir/$func_stripname_result.$libext"~test -z "$tstripme" || test -z "$striplib" || $striplib "$destdir/$func_stripname_result.$libext"'
+      postuninstall_cmds='for n in $library_names $old_library; do :; done~func_stripname "" ".so" "$n"~test "$func_stripname_result" = "$n" || func_append rmfiles " $odir/$func_stripname_result.$libext"'
+      # We do not specify a path in Import Files, so LIBPATH fires.
+      shlibpath_overrides_runpath=yes
+      ;;
+    *,no) # both, prefer aix
+      dynamic_linker="AIX lib.a(lib.so.V), lib.so.V($shared_archive_member_spec.o)"
+      library_names_spec='$libname$release.a $libname.a'
+      soname_spec='$libname$release$shared_ext$major'
+      # unpreferred sharedlib libNAME.so.V and symlink libNAME.so need extra handling
+      postinstall_cmds='test -z "$dlname" || $install_shared_prog $dir/$dlname $destdir/$dlname~test -z "$tstripme" || test -z "$striplib" || $striplib $destdir/$dlname~test -n "$linkname" || linkname=$realname~func_stripname "" ".a" "$linkname"~(cd "$destdir" && $LN_S -f $dlname $func_stripname_result.so)'
+      postuninstall_cmds='test -z "$dlname" || func_append rmfiles " $odir/$dlname"~for n in $old_library $library_names; do :; done~func_stripname "" ".a" "$n"~func_append rmfiles " $odir/$func_stripname_result.so"'
+      ;;
+    esac
+    shlibpath_var=LIBPATH
+  fi
+  ;;
+
+amigaos*)
+  case $host_cpu in
+  powerpc)
+    # Since July 2007 AmigaOS4 officially supports .so libraries.
+    # When compiling the executable, add -use-dynld -Lsobjs: to the compileline.
+    library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+    ;;
+  m68k)
+    library_names_spec='$libname.ixlibrary $libname.a'
+    # Create ${libname}_ixlibrary.a entries in /sys/libs.
+    finish_eval='for lib in `ls $libdir/*.ixlibrary 2>/dev/null`; do libname=`func_echo_all "$lib" | $SED '\''s%^.*/\([^/]*\)\.ixlibrary$%\1%'\''`; $RM /sys/libs/${libname}_ixlibrary.a; $show "cd /sys/libs && $LN_S $lib ${libname}_ixlibrary.a"; cd /sys/libs && $LN_S $lib ${libname}_ixlibrary.a || exit 1; done'
+    ;;
+  esac
+  ;;
+
+beos*)
+  library_names_spec='$libname$shared_ext'
+  dynamic_linker="$host_os ld.so"
+  shlibpath_var=LIBRARY_PATH
+  ;;
+
+bsdi[45]*)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  need_version=no
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  soname_spec='$libname$release$shared_ext$major'
+  finish_cmds='PATH="\$PATH:/sbin" ldconfig $libdir'
+  shlibpath_var=LD_LIBRARY_PATH
+  sys_lib_search_path_spec="/shlib /usr/lib /usr/X11/lib /usr/contrib/lib /lib /usr/local/lib"
+  sys_lib_dlsearch_path_spec="/shlib /usr/lib /usr/local/lib"
+  # the default ld.so.conf also contains /usr/contrib/lib and
+  # /usr/X11R6/lib (/usr/X11 is a link to /usr/X11R6), but let us allow
+  # libtool to hard-code these into programs
+  ;;
+
+cygwin* | mingw* | pw32* | cegcc*)
+  version_type=windows
+  shrext_cmds=.dll
+  need_version=no
+  need_lib_prefix=no
+
+  case $GCC,$cc_basename in
+  yes,*)
+    # gcc
+    library_names_spec='$libname.dll.a'
+    # DLL is installed to $(libdir)/../bin by postinstall_cmds
+    postinstall_cmds='base_file=`basename \$file`~
+      dlpath=`$SHELL 2>&1 -c '\''. $dir/'\''\$base_file'\''i; echo \$dlname'\''`~
+      dldir=$destdir/`dirname \$dlpath`~
+      test -d \$dldir || mkdir -p \$dldir~
+      $install_prog $dir/$dlname \$dldir/$dlname~
+      chmod a+x \$dldir/$dlname~
+      if test -n '\''$stripme'\'' && test -n '\''$striplib'\''; then
+        eval '\''$striplib \$dldir/$dlname'\'' || exit \$?;
+      fi'
+    postuninstall_cmds='dldll=`$SHELL 2>&1 -c '\''. $file; echo \$dlname'\''`~
+      dlpath=$dir/\$dldll~
+       $RM \$dlpath'
+    shlibpath_overrides_runpath=yes
+
+    case $host_os in
+    cygwin*)
+      # Cygwin DLLs use 'cyg' prefix rather than 'lib'
+      soname_spec='`echo $libname | sed -e 's/^lib/cyg/'``echo $release | $SED -e 's/[.]/-/g'`$versuffix$shared_ext'
+
+      sys_lib_search_path_spec="$sys_lib_search_path_spec /usr/lib/w32api"
+      ;;
+    mingw* | cegcc*)
+      # MinGW DLLs use traditional 'lib' prefix
+      soname_spec='$libname`echo $release | $SED -e 's/[.]/-/g'`$versuffix$shared_ext'
+      ;;
+    pw32*)
+      # pw32 DLLs use 'pw' prefix rather than 'lib'
+      library_names_spec='`echo $libname | sed -e 's/^lib/pw/'``echo $release | $SED -e 's/[.]/-/g'`$versuffix$shared_ext'
+      ;;
+    esac
+    dynamic_linker='Win32 ld.exe'
+    ;;
+
+  *,cl*)
+    # Native MSVC
+    libname_spec='$name'
+    soname_spec='$libname`echo $release | $SED -e 's/[.]/-/g'`$versuffix$shared_ext'
+    library_names_spec='$libname.dll.lib'
+
+    case $build_os in
+    mingw*)
+      sys_lib_search_path_spec=
+      lt_save_ifs=$IFS
+      IFS=';'
+      for lt_path in $LIB
+      do
+        IFS=$lt_save_ifs
+        # Let DOS variable expansion print the short 8.3 style file name.
+        lt_path=`cd "$lt_path" 2>/dev/null && cmd //C "for %i in (".") do @echo %~si"`
+        sys_lib_search_path_spec="$sys_lib_search_path_spec $lt_path"
+      done
+      IFS=$lt_save_ifs
+      # Convert to MSYS style.
+      sys_lib_search_path_spec=`$ECHO "$sys_lib_search_path_spec" | sed -e 's|\\\\|/|g' -e 's| \\([a-zA-Z]\\):| /\\1|g' -e 's|^ ||'`
+      ;;
+    cygwin*)
+      # Convert to unix form, then to dos form, then back to unix form
+      # but this time dos style (no spaces!) so that the unix form looks
+      # like /cygdrive/c/PROGRA~1:/cygdr...
+      sys_lib_search_path_spec=`cygpath --path --unix "$LIB"`
+      sys_lib_search_path_spec=`cygpath --path --dos "$sys_lib_search_path_spec" 2>/dev/null`
+      sys_lib_search_path_spec=`cygpath --path --unix "$sys_lib_search_path_spec" | $SED -e "s/$PATH_SEPARATOR/ /g"`
+      ;;
+    *)
+      sys_lib_search_path_spec=$LIB
+      if $ECHO "$sys_lib_search_path_spec" | $GREP ';[c-zC-Z]:/' >/dev/null; then
+        # It is most probably a Windows format PATH.
+        sys_lib_search_path_spec=`$ECHO "$sys_lib_search_path_spec" | $SED -e 's/;/ /g'`
+      else
+        sys_lib_search_path_spec=`$ECHO "$sys_lib_search_path_spec" | $SED -e "s/$PATH_SEPARATOR/ /g"`
+      fi
+      # FIXME: find the short name or the path components, as spaces are
+      # common. (e.g. "Program Files" -> "PROGRA~1")
+      ;;
+    esac
+
+    # DLL is installed to $(libdir)/../bin by postinstall_cmds
+    postinstall_cmds='base_file=`basename \$file`~
+      dlpath=`$SHELL 2>&1 -c '\''. $dir/'\''\$base_file'\''i; echo \$dlname'\''`~
+      dldir=$destdir/`dirname \$dlpath`~
+      test -d \$dldir || mkdir -p \$dldir~
+      $install_prog $dir/$dlname \$dldir/$dlname'
+    postuninstall_cmds='dldll=`$SHELL 2>&1 -c '\''. $file; echo \$dlname'\''`~
+      dlpath=$dir/\$dldll~
+       $RM \$dlpath'
+    shlibpath_overrides_runpath=yes
+    dynamic_linker='Win32 link.exe'
+    ;;
+
+  *)
+    # Assume MSVC wrapper
+    library_names_spec='$libname`echo $release | $SED -e 's/[.]/-/g'`$versuffix$shared_ext $libname.lib'
+    dynamic_linker='Win32 ld.exe'
+    ;;
+  esac
+  # FIXME: first we should search . and the directory the executable is in
+  shlibpath_var=PATH
+  ;;
+
+darwin* | rhapsody*)
+  dynamic_linker="$host_os dyld"
+  version_type=darwin
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='$libname$release$major$shared_ext $libname$shared_ext'
+  soname_spec='$libname$release$major$shared_ext'
+  shlibpath_overrides_runpath=yes
+  shlibpath_var=DYLD_LIBRARY_PATH
+  shrext_cmds='`test .$module = .yes && echo .so || echo .dylib`'
+
+  sys_lib_search_path_spec="$sys_lib_search_path_spec /usr/local/lib"
+  sys_lib_dlsearch_path_spec='/usr/local/lib /lib /usr/lib'
+  ;;
+
+dgux*)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  soname_spec='$libname$release$shared_ext$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  ;;
+
+freebsd* | dragonfly*)
+  # DragonFly does not have aout.  When/if they implement a new
+  # versioning mechanism, adjust this.
+  if test -x /usr/bin/objformat; then
+    objformat=`/usr/bin/objformat`
+  else
+    case $host_os in
+    freebsd[23].*) objformat=aout ;;
+    *) objformat=elf ;;
+    esac
+  fi
+  version_type=freebsd-$objformat
+  case $version_type in
+    freebsd-elf*)
+      library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+      soname_spec='$libname$release$shared_ext$major'
+      need_version=no
+      need_lib_prefix=no
+      ;;
+    freebsd-*)
+      library_names_spec='$libname$release$shared_ext$versuffix $libname$shared_ext$versuffix'
+      need_version=yes
+      ;;
+  esac
+  shlibpath_var=LD_LIBRARY_PATH
+  case $host_os in
+  freebsd2.*)
+    shlibpath_overrides_runpath=yes
+    ;;
+  freebsd3.[01]* | freebsdelf3.[01]*)
+    shlibpath_overrides_runpath=yes
+    hardcode_into_libs=yes
+    ;;
+  freebsd3.[2-9]* | freebsdelf3.[2-9]* | \
+  freebsd4.[0-5] | freebsdelf4.[0-5] | freebsd4.1.1 | freebsdelf4.1.1)
+    shlibpath_overrides_runpath=no
+    hardcode_into_libs=yes
+    ;;
+  *) # from 4.6 on, and DragonFly
+    shlibpath_overrides_runpath=yes
+    hardcode_into_libs=yes
+    ;;
+  esac
+  ;;
+
+haiku*)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  need_lib_prefix=no
+  need_version=no
+  dynamic_linker="$host_os runtime_loader"
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  soname_spec='$libname$release$shared_ext$major'
+  shlibpath_var=LIBRARY_PATH
+  shlibpath_overrides_runpath=no
+  sys_lib_dlsearch_path_spec='/boot/home/config/lib /boot/common/lib /boot/system/lib'
+  hardcode_into_libs=yes
+  ;;
+
+hpux9* | hpux10* | hpux11*)
+  # Give a soname corresponding to the major version so that dld.sl refuses to
+  # link against other versions.
+  version_type=sunos
+  need_lib_prefix=no
+  need_version=no
+  case $host_cpu in
+  ia64*)
+    shrext_cmds='.so'
+    hardcode_into_libs=yes
+    dynamic_linker="$host_os dld.so"
+    shlibpath_var=LD_LIBRARY_PATH
+    shlibpath_overrides_runpath=yes # Unless +noenvvar is specified.
+    library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+    soname_spec='$libname$release$shared_ext$major'
+    if test 32 = "$HPUX_IA64_MODE"; then
+      sys_lib_search_path_spec="/usr/lib/hpux32 /usr/local/lib/hpux32 /usr/local/lib"
+      sys_lib_dlsearch_path_spec=/usr/lib/hpux32
+    else
+      sys_lib_search_path_spec="/usr/lib/hpux64 /usr/local/lib/hpux64"
+      sys_lib_dlsearch_path_spec=/usr/lib/hpux64
+    fi
+    ;;
+  hppa*64*)
+    shrext_cmds='.sl'
+    hardcode_into_libs=yes
+    dynamic_linker="$host_os dld.sl"
+    shlibpath_var=LD_LIBRARY_PATH # How should we handle SHLIB_PATH
+    shlibpath_overrides_runpath=yes # Unless +noenvvar is specified.
+    library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+    soname_spec='$libname$release$shared_ext$major'
+    sys_lib_search_path_spec="/usr/lib/pa20_64 /usr/ccs/lib/pa20_64"
+    sys_lib_dlsearch_path_spec=$sys_lib_search_path_spec
+    ;;
+  *)
+    shrext_cmds='.sl'
+    dynamic_linker="$host_os dld.sl"
+    shlibpath_var=SHLIB_PATH
+    shlibpath_overrides_runpath=no # +s is required to enable SHLIB_PATH
+    library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+    soname_spec='$libname$release$shared_ext$major'
+    ;;
+  esac
+  # HP-UX runs *really* slowly unless shared libraries are mode 555, ...
+  postinstall_cmds='chmod 555 $lib'
+  # or fails outright, so override atomically:
+  install_override_mode=555
+  ;;
+
+interix[3-9]*)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  soname_spec='$libname$release$shared_ext$major'
+  dynamic_linker='Interix 3.x ld.so.1 (PE, like ELF)'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=no
+  hardcode_into_libs=yes
+  ;;
+
+irix5* | irix6* | nonstopux*)
+  case $host_os in
+    nonstopux*) version_type=nonstopux ;;
+    *)
+	if test yes = "$lt_cv_prog_gnu_ld"; then
+		version_type=linux # correct to gnu/linux during the next big refactor
+	else
+		version_type=irix
+	fi ;;
+  esac
+  need_lib_prefix=no
+  need_version=no
+  soname_spec='$libname$release$shared_ext$major'
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$release$shared_ext $libname$shared_ext'
+  case $host_os in
+  irix5* | nonstopux*)
+    libsuff= shlibsuff=
+    ;;
+  *)
+    case $LD in # libtool.m4 will add one of these switches to LD
+    *-32|*"-32 "|*-melf32bsmip|*"-melf32bsmip ")
+      libsuff= shlibsuff= libmagic=32-bit;;
+    *-n32|*"-n32 "|*-melf32bmipn32|*"-melf32bmipn32 ")
+      libsuff=32 shlibsuff=N32 libmagic=N32;;
+    *-64|*"-64 "|*-melf64bmip|*"-melf64bmip ")
+      libsuff=64 shlibsuff=64 libmagic=64-bit;;
+    *) libsuff= shlibsuff= libmagic=never-match;;
+    esac
+    ;;
+  esac
+  shlibpath_var=LD_LIBRARY${shlibsuff}_PATH
+  shlibpath_overrides_runpath=no
+  sys_lib_search_path_spec="/usr/lib$libsuff /lib$libsuff /usr/local/lib$libsuff"
+  sys_lib_dlsearch_path_spec="/usr/lib$libsuff /lib$libsuff"
+  hardcode_into_libs=yes
+  ;;
+
+# No shared lib support for Linux oldld, aout, or coff.
+linux*oldld* | linux*aout* | linux*coff*)
+  dynamic_linker=no
+  ;;
+
+linux*android*)
+  version_type=none # Android doesn't support versioned libraries.
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='$libname$release$shared_ext'
+  soname_spec='$libname$release$shared_ext'
+  finish_cmds=
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+
+  # This implies no fast_install, which is unacceptable.
+  # Some rework will be needed to allow for fast_install
+  # before this can be enabled.
+  hardcode_into_libs=yes
+
+  dynamic_linker='Android linker'
+  # Don't embed -rpath directories since the linker doesn't support them.
+  hardcode_libdir_flag_spec='-L$libdir'
+  ;;
+
+# This must be glibc/ELF.
+linux* | k*bsd*-gnu | kopensolaris*-gnu | gnu*)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  soname_spec='$libname$release$shared_ext$major'
+  finish_cmds='PATH="\$PATH:/sbin" ldconfig -n $libdir'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=no
+
+  # Some binutils ld are patched to set DT_RUNPATH
+  if ${lt_cv_shlibpath_overrides_runpath+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_shlibpath_overrides_runpath=no
+    save_LDFLAGS=$LDFLAGS
+    save_libdir=$libdir
+    eval "libdir=/foo; wl=\"$lt_prog_compiler_wl\"; \
+	 LDFLAGS=\"\$LDFLAGS $hardcode_libdir_flag_spec\""
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  if  ($OBJDUMP -p conftest$ac_exeext) 2>/dev/null | grep "RUNPATH.*$libdir" >/dev/null; then :
+  lt_cv_shlibpath_overrides_runpath=yes
+fi
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+    LDFLAGS=$save_LDFLAGS
+    libdir=$save_libdir
+
+fi
+
+  shlibpath_overrides_runpath=$lt_cv_shlibpath_overrides_runpath
+
+  # This implies no fast_install, which is unacceptable.
+  # Some rework will be needed to allow for fast_install
+  # before this can be enabled.
+  hardcode_into_libs=yes
+
+  # Ideally, we could use ldconfig to report *all* directores which are
+  # searched for libraries, however this is still not possible.  Aside from not
+  # being certain /sbin/ldconfig is available, command
+  # 'ldconfig -N -X -v | grep ^/' on 64bit Fedora does not report /usr/lib64,
+  # even though it is searched at run-time.  Try to do the best guess by
+  # appending ld.so.conf contents (and includes) to the search path.
+  if test -f /etc/ld.so.conf; then
+    lt_ld_extra=`awk '/^include / { system(sprintf("cd /etc; cat %s 2>/dev/null", \$2)); skip = 1; } { if (!skip) print \$0; skip = 0; }' < /etc/ld.so.conf | $SED -e 's/#.*//;/^[	 ]*hwcap[	 ]/d;s/[:,	]/ /g;s/=[^=]*$//;s/=[^= ]* / /g;s/"//g;/^$/d' | tr '\n' ' '`
+    sys_lib_dlsearch_path_spec="/lib /usr/lib $lt_ld_extra"
+  fi
+
+  # We used to test for /lib/ld.so.1 and disable shared libraries on
+  # powerpc, because MkLinux only supported shared libraries with the
+  # GNU dynamic linker.  Since this was broken with cross compilers,
+  # most powerpc-linux boxes support dynamic linking these days and
+  # people can always --disable-shared, the test was removed, and we
+  # assume the GNU/Linux dynamic linker is in use.
+  dynamic_linker='GNU/Linux ld.so'
+  ;;
+
+netbsdelf*-gnu)
+  version_type=linux
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major ${libname}${shared_ext}'
+  soname_spec='${libname}${release}${shared_ext}$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=no
+  hardcode_into_libs=yes
+  dynamic_linker='NetBSD ld.elf_so'
+  ;;
+
+netbsd*)
+  version_type=sunos
+  need_lib_prefix=no
+  need_version=no
+  if echo __ELF__ | $CC -E - | $GREP __ELF__ >/dev/null; then
+    library_names_spec='$libname$release$shared_ext$versuffix $libname$shared_ext$versuffix'
+    finish_cmds='PATH="\$PATH:/sbin" ldconfig -m $libdir'
+    dynamic_linker='NetBSD (a.out) ld.so'
+  else
+    library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+    soname_spec='$libname$release$shared_ext$major'
+    dynamic_linker='NetBSD ld.elf_so'
+  fi
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  hardcode_into_libs=yes
+  ;;
+
+newsos6)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  ;;
+
+*nto* | *qnx*)
+  version_type=qnx
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  soname_spec='$libname$release$shared_ext$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=no
+  hardcode_into_libs=yes
+  dynamic_linker='ldqnx.so'
+  ;;
+
+openbsd* | bitrig*)
+  version_type=sunos
+  sys_lib_dlsearch_path_spec=/usr/lib
+  need_lib_prefix=no
+  if test -z "`echo __ELF__ | $CC -E - | $GREP __ELF__`"; then
+    need_version=no
+  else
+    need_version=yes
+  fi
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$shared_ext$versuffix'
+  finish_cmds='PATH="\$PATH:/sbin" ldconfig -m $libdir'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  ;;
+
+os2*)
+  libname_spec='$name'
+  version_type=windows
+  shrext_cmds=.dll
+  need_version=no
+  need_lib_prefix=no
+  # OS/2 can only load a DLL with a base name of 8 characters or less.
+  soname_spec='`test -n "$os2dllname" && libname="$os2dllname";
+    v=$($ECHO $release$versuffix | tr -d .-);
+    n=$($ECHO $libname | cut -b -$((8 - ${#v})) | tr . _);
+    $ECHO $n$v`$shared_ext'
+  library_names_spec='${libname}_dll.$libext'
+  dynamic_linker='OS/2 ld.exe'
+  shlibpath_var=BEGINLIBPATH
+  sys_lib_search_path_spec="/lib /usr/lib /usr/local/lib"
+  sys_lib_dlsearch_path_spec=$sys_lib_search_path_spec
+  postinstall_cmds='base_file=`basename \$file`~
+    dlpath=`$SHELL 2>&1 -c '\''. $dir/'\''\$base_file'\''i; $ECHO \$dlname'\''`~
+    dldir=$destdir/`dirname \$dlpath`~
+    test -d \$dldir || mkdir -p \$dldir~
+    $install_prog $dir/$dlname \$dldir/$dlname~
+    chmod a+x \$dldir/$dlname~
+    if test -n '\''$stripme'\'' && test -n '\''$striplib'\''; then
+      eval '\''$striplib \$dldir/$dlname'\'' || exit \$?;
+    fi'
+  postuninstall_cmds='dldll=`$SHELL 2>&1 -c '\''. $file; $ECHO \$dlname'\''`~
+    dlpath=$dir/\$dldll~
+    $RM \$dlpath'
+  ;;
+
+osf3* | osf4* | osf5*)
+  version_type=osf
+  need_lib_prefix=no
+  need_version=no
+  soname_spec='$libname$release$shared_ext$major'
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  shlibpath_var=LD_LIBRARY_PATH
+  sys_lib_search_path_spec="/usr/shlib /usr/ccs/lib /usr/lib/cmplrs/cc /usr/lib /usr/local/lib /var/shlib"
+  sys_lib_dlsearch_path_spec=$sys_lib_search_path_spec
+  ;;
+
+rdos*)
+  dynamic_linker=no
+  ;;
+
+solaris*)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  soname_spec='$libname$release$shared_ext$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  hardcode_into_libs=yes
+  # ldd complains unless libraries are executable
+  postinstall_cmds='chmod +x $lib'
+  ;;
+
+sunos4*)
+  version_type=sunos
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$shared_ext$versuffix'
+  finish_cmds='PATH="\$PATH:/usr/etc" ldconfig $libdir'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  if test yes = "$with_gnu_ld"; then
+    need_lib_prefix=no
+  fi
+  need_version=yes
+  ;;
+
+sysv4 | sysv4.3*)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  soname_spec='$libname$release$shared_ext$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  case $host_vendor in
+    sni)
+      shlibpath_overrides_runpath=no
+      need_lib_prefix=no
+      runpath_var=LD_RUN_PATH
+      ;;
+    siemens)
+      need_lib_prefix=no
+      ;;
+    motorola)
+      need_lib_prefix=no
+      need_version=no
+      shlibpath_overrides_runpath=no
+      sys_lib_search_path_spec='/lib /usr/lib /usr/ccs/lib'
+      ;;
+  esac
+  ;;
+
+sysv4*MP*)
+  if test -d /usr/nec; then
+    version_type=linux # correct to gnu/linux during the next big refactor
+    library_names_spec='$libname$shared_ext.$versuffix $libname$shared_ext.$major $libname$shared_ext'
+    soname_spec='$libname$shared_ext.$major'
+    shlibpath_var=LD_LIBRARY_PATH
+  fi
+  ;;
+
+sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX* | sysv4*uw2*)
+  version_type=sco
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext $libname$shared_ext'
+  soname_spec='$libname$release$shared_ext$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  hardcode_into_libs=yes
+  if test yes = "$with_gnu_ld"; then
+    sys_lib_search_path_spec='/usr/local/lib /usr/gnu/lib /usr/ccs/lib /usr/lib /lib'
+  else
+    sys_lib_search_path_spec='/usr/ccs/lib /usr/lib'
+    case $host_os in
+      sco3.2v5*)
+        sys_lib_search_path_spec="$sys_lib_search_path_spec /lib"
+	;;
+    esac
+  fi
+  sys_lib_dlsearch_path_spec='/usr/lib'
+  ;;
+
+tpf*)
+  # TPF is a cross-target only.  Preferred cross-host = GNU/Linux.
+  version_type=linux # correct to gnu/linux during the next big refactor
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=no
+  hardcode_into_libs=yes
+  ;;
+
+uts4*)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  soname_spec='$libname$release$shared_ext$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  ;;
+
+*)
+  dynamic_linker=no
+  ;;
+esac
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $dynamic_linker" >&5
+$as_echo "$dynamic_linker" >&6; }
+test no = "$dynamic_linker" && can_build_shared=no
+
+variables_saved_for_relink="PATH $shlibpath_var $runpath_var"
+if test yes = "$GCC"; then
+  variables_saved_for_relink="$variables_saved_for_relink GCC_EXEC_PREFIX COMPILER_PATH LIBRARY_PATH"
+fi
+
+if test set = "${lt_cv_sys_lib_search_path_spec+set}"; then
+  sys_lib_search_path_spec=$lt_cv_sys_lib_search_path_spec
+fi
+
+if test set = "${lt_cv_sys_lib_dlsearch_path_spec+set}"; then
+  sys_lib_dlsearch_path_spec=$lt_cv_sys_lib_dlsearch_path_spec
+fi
+
+# remember unaugmented sys_lib_dlsearch_path content for libtool script decls...
+configure_time_dlsearch_path=$sys_lib_dlsearch_path_spec
+
+# ... but it needs LT_SYS_LIBRARY_PATH munging for other configure-time code
+func_munge_path_list sys_lib_dlsearch_path_spec "$LT_SYS_LIBRARY_PATH"
+
+# to be used as default LT_SYS_LIBRARY_PATH value in generated libtool
+configure_time_lt_sys_library_path=$LT_SYS_LIBRARY_PATH
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
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+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking how to hardcode library paths into programs" >&5
+$as_echo_n "checking how to hardcode library paths into programs... " >&6; }
+hardcode_action=
+if test -n "$hardcode_libdir_flag_spec" ||
+   test -n "$runpath_var" ||
+   test yes = "$hardcode_automatic"; then
+
+  # We can hardcode non-existent directories.
+  if test no != "$hardcode_direct" &&
+     # If the only mechanism to avoid hardcoding is shlibpath_var, we
+     # have to relink, otherwise we might link with an installed library
+     # when we should be linking with a yet-to-be-installed one
+     ## test no != "$_LT_TAGVAR(hardcode_shlibpath_var, )" &&
+     test no != "$hardcode_minus_L"; then
+    # Linking always hardcodes the temporary library directory.
+    hardcode_action=relink
+  else
+    # We can link without hardcoding, and we can hardcode nonexisting dirs.
+    hardcode_action=immediate
+  fi
+else
+  # We cannot hardcode anything, or else we can only hardcode existing
+  # directories.
+  hardcode_action=unsupported
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $hardcode_action" >&5
+$as_echo "$hardcode_action" >&6; }
+
+if test relink = "$hardcode_action" ||
+   test yes = "$inherit_rpath"; then
+  # Fast installation is not supported
+  enable_fast_install=no
+elif test yes = "$shlibpath_overrides_runpath" ||
+     test no = "$enable_shared"; then
+  # Fast installation is not necessary
+  enable_fast_install=needless
+fi
+
+
+
+
+
+
+  if test yes != "$enable_dlopen"; then
+  enable_dlopen=unknown
+  enable_dlopen_self=unknown
+  enable_dlopen_self_static=unknown
+else
+  lt_cv_dlopen=no
+  lt_cv_dlopen_libs=
+
+  case $host_os in
+  beos*)
+    lt_cv_dlopen=load_add_on
+    lt_cv_dlopen_libs=
+    lt_cv_dlopen_self=yes
+    ;;
+
+  mingw* | pw32* | cegcc*)
+    lt_cv_dlopen=LoadLibrary
+    lt_cv_dlopen_libs=
+    ;;
+
+  cygwin*)
+    lt_cv_dlopen=dlopen
+    lt_cv_dlopen_libs=
+    ;;
+
+  darwin*)
+    # if libdl is installed we need to link against it
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for dlopen in -ldl" >&5
+$as_echo_n "checking for dlopen in -ldl... " >&6; }
+if ${ac_cv_lib_dl_dlopen+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-ldl  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char dlopen ();
+int
+main ()
+{
+return dlopen ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_dl_dlopen=yes
+else
+  ac_cv_lib_dl_dlopen=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dl_dlopen" >&5
+$as_echo "$ac_cv_lib_dl_dlopen" >&6; }
+if test "x$ac_cv_lib_dl_dlopen" = xyes; then :
+  lt_cv_dlopen=dlopen lt_cv_dlopen_libs=-ldl
+else
+
+    lt_cv_dlopen=dyld
+    lt_cv_dlopen_libs=
+    lt_cv_dlopen_self=yes
+
+fi
+
+    ;;
+
+  tpf*)
+    # Don't try to run any link tests for TPF.  We know it's impossible
+    # because TPF is a cross-compiler, and we know how we open DSOs.
+    lt_cv_dlopen=dlopen
+    lt_cv_dlopen_libs=
+    lt_cv_dlopen_self=no
+    ;;
+
+  *)
+    ac_fn_c_check_func "$LINENO" "shl_load" "ac_cv_func_shl_load"
+if test "x$ac_cv_func_shl_load" = xyes; then :
+  lt_cv_dlopen=shl_load
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for shl_load in -ldld" >&5
+$as_echo_n "checking for shl_load in -ldld... " >&6; }
+if ${ac_cv_lib_dld_shl_load+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-ldld  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char shl_load ();
+int
+main ()
+{
+return shl_load ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_dld_shl_load=yes
+else
+  ac_cv_lib_dld_shl_load=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dld_shl_load" >&5
+$as_echo "$ac_cv_lib_dld_shl_load" >&6; }
+if test "x$ac_cv_lib_dld_shl_load" = xyes; then :
+  lt_cv_dlopen=shl_load lt_cv_dlopen_libs=-ldld
+else
+  ac_fn_c_check_func "$LINENO" "dlopen" "ac_cv_func_dlopen"
+if test "x$ac_cv_func_dlopen" = xyes; then :
+  lt_cv_dlopen=dlopen
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for dlopen in -ldl" >&5
+$as_echo_n "checking for dlopen in -ldl... " >&6; }
+if ${ac_cv_lib_dl_dlopen+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-ldl  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char dlopen ();
+int
+main ()
+{
+return dlopen ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_dl_dlopen=yes
+else
+  ac_cv_lib_dl_dlopen=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dl_dlopen" >&5
+$as_echo "$ac_cv_lib_dl_dlopen" >&6; }
+if test "x$ac_cv_lib_dl_dlopen" = xyes; then :
+  lt_cv_dlopen=dlopen lt_cv_dlopen_libs=-ldl
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for dlopen in -lsvld" >&5
+$as_echo_n "checking for dlopen in -lsvld... " >&6; }
+if ${ac_cv_lib_svld_dlopen+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lsvld  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char dlopen ();
+int
+main ()
+{
+return dlopen ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_svld_dlopen=yes
+else
+  ac_cv_lib_svld_dlopen=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_svld_dlopen" >&5
+$as_echo "$ac_cv_lib_svld_dlopen" >&6; }
+if test "x$ac_cv_lib_svld_dlopen" = xyes; then :
+  lt_cv_dlopen=dlopen lt_cv_dlopen_libs=-lsvld
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for dld_link in -ldld" >&5
+$as_echo_n "checking for dld_link in -ldld... " >&6; }
+if ${ac_cv_lib_dld_dld_link+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-ldld  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char dld_link ();
+int
+main ()
+{
+return dld_link ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_dld_dld_link=yes
+else
+  ac_cv_lib_dld_dld_link=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dld_dld_link" >&5
+$as_echo "$ac_cv_lib_dld_dld_link" >&6; }
+if test "x$ac_cv_lib_dld_dld_link" = xyes; then :
+  lt_cv_dlopen=dld_link lt_cv_dlopen_libs=-ldld
+fi
+
+
+fi
+
+
+fi
+
+
+fi
+
+
+fi
+
+
+fi
+
+    ;;
+  esac
+
+  if test no = "$lt_cv_dlopen"; then
+    enable_dlopen=no
+  else
+    enable_dlopen=yes
+  fi
+
+  case $lt_cv_dlopen in
+  dlopen)
+    save_CPPFLAGS=$CPPFLAGS
+    test yes = "$ac_cv_header_dlfcn_h" && CPPFLAGS="$CPPFLAGS -DHAVE_DLFCN_H"
+
+    save_LDFLAGS=$LDFLAGS
+    wl=$lt_prog_compiler_wl eval LDFLAGS=\"\$LDFLAGS $export_dynamic_flag_spec\"
+
+    save_LIBS=$LIBS
+    LIBS="$lt_cv_dlopen_libs $LIBS"
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether a program can dlopen itself" >&5
+$as_echo_n "checking whether a program can dlopen itself... " >&6; }
+if ${lt_cv_dlopen_self+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  	  if test yes = "$cross_compiling"; then :
+  lt_cv_dlopen_self=cross
+else
+  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
+  lt_status=$lt_dlunknown
+  cat > conftest.$ac_ext <<_LT_EOF
+#line $LINENO "configure"
+#include "confdefs.h"
+
+#if HAVE_DLFCN_H
+#include <dlfcn.h>
+#endif
+
+#include <stdio.h>
+
+#ifdef RTLD_GLOBAL
+#  define LT_DLGLOBAL		RTLD_GLOBAL
+#else
+#  ifdef DL_GLOBAL
+#    define LT_DLGLOBAL		DL_GLOBAL
+#  else
+#    define LT_DLGLOBAL		0
+#  endif
+#endif
+
+/* We may have to define LT_DLLAZY_OR_NOW in the command line if we
+   find out it does not work in some platform. */
+#ifndef LT_DLLAZY_OR_NOW
+#  ifdef RTLD_LAZY
+#    define LT_DLLAZY_OR_NOW		RTLD_LAZY
+#  else
+#    ifdef DL_LAZY
+#      define LT_DLLAZY_OR_NOW		DL_LAZY
+#    else
+#      ifdef RTLD_NOW
+#        define LT_DLLAZY_OR_NOW	RTLD_NOW
+#      else
+#        ifdef DL_NOW
+#          define LT_DLLAZY_OR_NOW	DL_NOW
+#        else
+#          define LT_DLLAZY_OR_NOW	0
+#        endif
+#      endif
+#    endif
+#  endif
+#endif
+
+/* When -fvisibility=hidden is used, assume the code has been annotated
+   correspondingly for the symbols needed.  */
+#if defined __GNUC__ && (((__GNUC__ == 3) && (__GNUC_MINOR__ >= 3)) || (__GNUC__ > 3))
+int fnord () __attribute__((visibility("default")));
+#endif
+
+int fnord () { return 42; }
+int main ()
+{
+  void *self = dlopen (0, LT_DLGLOBAL|LT_DLLAZY_OR_NOW);
+  int status = $lt_dlunknown;
+
+  if (self)
+    {
+      if (dlsym (self,"fnord"))       status = $lt_dlno_uscore;
+      else
+        {
+	  if (dlsym( self,"_fnord"))  status = $lt_dlneed_uscore;
+          else puts (dlerror ());
+	}
+      /* dlclose (self); */
+    }
+  else
+    puts (dlerror ());
+
+  return status;
+}
+_LT_EOF
+  if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s "conftest$ac_exeext" 2>/dev/null; then
+    (./conftest; exit; ) >&5 2>/dev/null
+    lt_status=$?
+    case x$lt_status in
+      x$lt_dlno_uscore) lt_cv_dlopen_self=yes ;;
+      x$lt_dlneed_uscore) lt_cv_dlopen_self=yes ;;
+      x$lt_dlunknown|x*) lt_cv_dlopen_self=no ;;
+    esac
+  else :
+    # compilation failed
+    lt_cv_dlopen_self=no
+  fi
+fi
+rm -fr conftest*
+
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_dlopen_self" >&5
+$as_echo "$lt_cv_dlopen_self" >&6; }
+
+    if test yes = "$lt_cv_dlopen_self"; then
+      wl=$lt_prog_compiler_wl eval LDFLAGS=\"\$LDFLAGS $lt_prog_compiler_static\"
+      { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether a statically linked program can dlopen itself" >&5
+$as_echo_n "checking whether a statically linked program can dlopen itself... " >&6; }
+if ${lt_cv_dlopen_self_static+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  	  if test yes = "$cross_compiling"; then :
+  lt_cv_dlopen_self_static=cross
+else
+  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
+  lt_status=$lt_dlunknown
+  cat > conftest.$ac_ext <<_LT_EOF
+#line $LINENO "configure"
+#include "confdefs.h"
+
+#if HAVE_DLFCN_H
+#include <dlfcn.h>
+#endif
+
+#include <stdio.h>
+
+#ifdef RTLD_GLOBAL
+#  define LT_DLGLOBAL		RTLD_GLOBAL
+#else
+#  ifdef DL_GLOBAL
+#    define LT_DLGLOBAL		DL_GLOBAL
+#  else
+#    define LT_DLGLOBAL		0
+#  endif
+#endif
+
+/* We may have to define LT_DLLAZY_OR_NOW in the command line if we
+   find out it does not work in some platform. */
+#ifndef LT_DLLAZY_OR_NOW
+#  ifdef RTLD_LAZY
+#    define LT_DLLAZY_OR_NOW		RTLD_LAZY
+#  else
+#    ifdef DL_LAZY
+#      define LT_DLLAZY_OR_NOW		DL_LAZY
+#    else
+#      ifdef RTLD_NOW
+#        define LT_DLLAZY_OR_NOW	RTLD_NOW
+#      else
+#        ifdef DL_NOW
+#          define LT_DLLAZY_OR_NOW	DL_NOW
+#        else
+#          define LT_DLLAZY_OR_NOW	0
+#        endif
+#      endif
+#    endif
+#  endif
+#endif
+
+/* When -fvisibility=hidden is used, assume the code has been annotated
+   correspondingly for the symbols needed.  */
+#if defined __GNUC__ && (((__GNUC__ == 3) && (__GNUC_MINOR__ >= 3)) || (__GNUC__ > 3))
+int fnord () __attribute__((visibility("default")));
+#endif
+
+int fnord () { return 42; }
+int main ()
+{
+  void *self = dlopen (0, LT_DLGLOBAL|LT_DLLAZY_OR_NOW);
+  int status = $lt_dlunknown;
+
+  if (self)
+    {
+      if (dlsym (self,"fnord"))       status = $lt_dlno_uscore;
+      else
+        {
+	  if (dlsym( self,"_fnord"))  status = $lt_dlneed_uscore;
+          else puts (dlerror ());
+	}
+      /* dlclose (self); */
+    }
+  else
+    puts (dlerror ());
+
+  return status;
+}
+_LT_EOF
+  if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s "conftest$ac_exeext" 2>/dev/null; then
+    (./conftest; exit; ) >&5 2>/dev/null
+    lt_status=$?
+    case x$lt_status in
+      x$lt_dlno_uscore) lt_cv_dlopen_self_static=yes ;;
+      x$lt_dlneed_uscore) lt_cv_dlopen_self_static=yes ;;
+      x$lt_dlunknown|x*) lt_cv_dlopen_self_static=no ;;
+    esac
+  else :
+    # compilation failed
+    lt_cv_dlopen_self_static=no
+  fi
+fi
+rm -fr conftest*
+
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_dlopen_self_static" >&5
+$as_echo "$lt_cv_dlopen_self_static" >&6; }
+    fi
+
+    CPPFLAGS=$save_CPPFLAGS
+    LDFLAGS=$save_LDFLAGS
+    LIBS=$save_LIBS
+    ;;
+  esac
+
+  case $lt_cv_dlopen_self in
+  yes|no) enable_dlopen_self=$lt_cv_dlopen_self ;;
+  *) enable_dlopen_self=unknown ;;
+  esac
+
+  case $lt_cv_dlopen_self_static in
+  yes|no) enable_dlopen_self_static=$lt_cv_dlopen_self_static ;;
+  *) enable_dlopen_self_static=unknown ;;
+  esac
+fi
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+striplib=
+old_striplib=
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether stripping libraries is possible" >&5
+$as_echo_n "checking whether stripping libraries is possible... " >&6; }
+if test -n "$STRIP" && $STRIP -V 2>&1 | $GREP "GNU strip" >/dev/null; then
+  test -z "$old_striplib" && old_striplib="$STRIP --strip-debug"
+  test -z "$striplib" && striplib="$STRIP --strip-unneeded"
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+else
+# FIXME - insert some real tests, host_os isn't really good enough
+  case $host_os in
+  darwin*)
+    if test -n "$STRIP"; then
+      striplib="$STRIP -x"
+      old_striplib="$STRIP -S"
+      { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+    else
+      { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+    fi
+    ;;
+  *)
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+    ;;
+  esac
+fi
+
+
+
+
+
+
+
+
+
+
+
+
+  # Report what library types will actually be built
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if libtool supports shared libraries" >&5
+$as_echo_n "checking if libtool supports shared libraries... " >&6; }
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $can_build_shared" >&5
+$as_echo "$can_build_shared" >&6; }
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to build shared libraries" >&5
+$as_echo_n "checking whether to build shared libraries... " >&6; }
+  test no = "$can_build_shared" && enable_shared=no
+
+  # On AIX, shared libraries and static libraries use the same namespace, and
+  # are all built from PIC.
+  case $host_os in
+  aix3*)
+    test yes = "$enable_shared" && enable_static=no
+    if test -n "$RANLIB"; then
+      archive_cmds="$archive_cmds~\$RANLIB \$lib"
+      postinstall_cmds='$RANLIB $lib'
+    fi
+    ;;
+
+  aix[4-9]*)
+    if test ia64 != "$host_cpu"; then
+      case $enable_shared,$with_aix_soname,$aix_use_runtimelinking in
+      yes,aix,yes) ;;			# shared object as lib.so file only
+      yes,svr4,*) ;;			# shared object as lib.so archive member only
+      yes,*) enable_static=no ;;	# shared object in lib.a archive as well
+      esac
+    fi
+    ;;
+  esac
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_shared" >&5
+$as_echo "$enable_shared" >&6; }
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to build static libraries" >&5
+$as_echo_n "checking whether to build static libraries... " >&6; }
+  # Make sure either enable_shared or enable_static is yes.
+  test yes = "$enable_shared" || enable_static=yes
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_static" >&5
+$as_echo "$enable_static" >&6; }
+
+
+
+
+fi
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+CC=$lt_save_CC
+
+      if test -n "$CXX" && ( test no != "$CXX" &&
+    ( (test g++ = "$CXX" && `g++ -v >/dev/null 2>&1` ) ||
+    (test g++ != "$CXX"))); then
+  ac_ext=cpp
+ac_cpp='$CXXCPP $CPPFLAGS'
+ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to run the C++ preprocessor" >&5
+$as_echo_n "checking how to run the C++ preprocessor... " >&6; }
+if test -z "$CXXCPP"; then
+  if ${ac_cv_prog_CXXCPP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+      # Double quotes because CXXCPP needs to be expanded
+    for CXXCPP in "$CXX -E" "/lib/cpp"
+    do
+      ac_preproc_ok=false
+for ac_cxx_preproc_warn_flag in '' yes
+do
+  # Use a header file that comes with gcc, so configuring glibc
+  # with a fresh cross-compiler works.
+  # Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
+  # <limits.h> exists even on freestanding compilers.
+  # On the NeXT, cc -E runs the code through the compiler's parser,
+  # not just through cpp. "Syntax error" is here to catch this case.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#ifdef __STDC__
+# include <limits.h>
+#else
+# include <assert.h>
+#endif
+		     Syntax error
+_ACEOF
+if ac_fn_cxx_try_cpp "$LINENO"; then :
+
+else
+  # Broken: fails on valid input.
+continue
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+
+  # OK, works on sane cases.  Now check whether nonexistent headers
+  # can be detected and how.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <ac_nonexistent.h>
+_ACEOF
+if ac_fn_cxx_try_cpp "$LINENO"; then :
+  # Broken: success on invalid input.
+continue
+else
+  # Passes both tests.
+ac_preproc_ok=:
+break
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+
+done
+# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
+rm -f conftest.i conftest.err conftest.$ac_ext
+if $ac_preproc_ok; then :
+  break
+fi
+
+    done
+    ac_cv_prog_CXXCPP=$CXXCPP
+
+fi
+  CXXCPP=$ac_cv_prog_CXXCPP
+else
+  ac_cv_prog_CXXCPP=$CXXCPP
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $CXXCPP" >&5
+$as_echo "$CXXCPP" >&6; }
+ac_preproc_ok=false
+for ac_cxx_preproc_warn_flag in '' yes
+do
+  # Use a header file that comes with gcc, so configuring glibc
+  # with a fresh cross-compiler works.
+  # Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
+  # <limits.h> exists even on freestanding compilers.
+  # On the NeXT, cc -E runs the code through the compiler's parser,
+  # not just through cpp. "Syntax error" is here to catch this case.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#ifdef __STDC__
+# include <limits.h>
+#else
+# include <assert.h>
+#endif
+		     Syntax error
+_ACEOF
+if ac_fn_cxx_try_cpp "$LINENO"; then :
+
+else
+  # Broken: fails on valid input.
+continue
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+
+  # OK, works on sane cases.  Now check whether nonexistent headers
+  # can be detected and how.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <ac_nonexistent.h>
+_ACEOF
+if ac_fn_cxx_try_cpp "$LINENO"; then :
+  # Broken: success on invalid input.
+continue
+else
+  # Passes both tests.
+ac_preproc_ok=:
+break
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+
+done
+# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
+rm -f conftest.i conftest.err conftest.$ac_ext
+if $ac_preproc_ok; then :
+
+else
+  { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "C++ preprocessor \"$CXXCPP\" fails sanity check
+See \`config.log' for more details" "$LINENO" 5; }
+fi
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+else
+  _lt_caught_CXX_error=yes
+fi
+
+ac_ext=cpp
+ac_cpp='$CXXCPP $CPPFLAGS'
+ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
+
+archive_cmds_need_lc_CXX=no
+allow_undefined_flag_CXX=
+always_export_symbols_CXX=no
+archive_expsym_cmds_CXX=
+compiler_needs_object_CXX=no
+export_dynamic_flag_spec_CXX=
+hardcode_direct_CXX=no
+hardcode_direct_absolute_CXX=no
+hardcode_libdir_flag_spec_CXX=
+hardcode_libdir_separator_CXX=
+hardcode_minus_L_CXX=no
+hardcode_shlibpath_var_CXX=unsupported
+hardcode_automatic_CXX=no
+inherit_rpath_CXX=no
+module_cmds_CXX=
+module_expsym_cmds_CXX=
+link_all_deplibs_CXX=unknown
+old_archive_cmds_CXX=$old_archive_cmds
+reload_flag_CXX=$reload_flag
+reload_cmds_CXX=$reload_cmds
+no_undefined_flag_CXX=
+whole_archive_flag_spec_CXX=
+enable_shared_with_static_runtimes_CXX=no
+
+# Source file extension for C++ test sources.
+ac_ext=cpp
+
+# Object file extension for compiled C++ test sources.
+objext=o
+objext_CXX=$objext
+
+# No sense in running all these tests if we already determined that
+# the CXX compiler isn't working.  Some variables (like enable_shared)
+# are currently assumed to apply to all compilers on this platform,
+# and will be corrupted by setting them based on a non-working compiler.
+if test yes != "$_lt_caught_CXX_error"; then
+  # Code to be used in simple compile tests
+  lt_simple_compile_test_code="int some_variable = 0;"
+
+  # Code to be used in simple link tests
+  lt_simple_link_test_code='int main(int, char *[]) { return(0); }'
+
+  # ltmain only uses $CC for tagged configurations so make sure $CC is set.
+
+
+
+
+
+
+# If no C compiler was specified, use CC.
+LTCC=${LTCC-"$CC"}
+
+# If no C compiler flags were specified, use CFLAGS.
+LTCFLAGS=${LTCFLAGS-"$CFLAGS"}
+
+# Allow CC to be a program name with arguments.
+compiler=$CC
+
+
+  # save warnings/boilerplate of simple test code
+  ac_outfile=conftest.$ac_objext
+echo "$lt_simple_compile_test_code" >conftest.$ac_ext
+eval "$ac_compile" 2>&1 >/dev/null | $SED '/^$/d; /^ *+/d' >conftest.err
+_lt_compiler_boilerplate=`cat conftest.err`
+$RM conftest*
+
+  ac_outfile=conftest.$ac_objext
+echo "$lt_simple_link_test_code" >conftest.$ac_ext
+eval "$ac_link" 2>&1 >/dev/null | $SED '/^$/d; /^ *+/d' >conftest.err
+_lt_linker_boilerplate=`cat conftest.err`
+$RM -r conftest*
+
+
+  # Allow CC to be a program name with arguments.
+  lt_save_CC=$CC
+  lt_save_CFLAGS=$CFLAGS
+  lt_save_LD=$LD
+  lt_save_GCC=$GCC
+  GCC=$GXX
+  lt_save_with_gnu_ld=$with_gnu_ld
+  lt_save_path_LD=$lt_cv_path_LD
+  if test -n "${lt_cv_prog_gnu_ldcxx+set}"; then
+    lt_cv_prog_gnu_ld=$lt_cv_prog_gnu_ldcxx
+  else
+    $as_unset lt_cv_prog_gnu_ld
+  fi
+  if test -n "${lt_cv_path_LDCXX+set}"; then
+    lt_cv_path_LD=$lt_cv_path_LDCXX
+  else
+    $as_unset lt_cv_path_LD
+  fi
+  test -z "${LDCXX+set}" || LD=$LDCXX
+  CC=${CXX-"c++"}
+  CFLAGS=$CXXFLAGS
+  compiler=$CC
+  compiler_CXX=$CC
+  func_cc_basename $compiler
+cc_basename=$func_cc_basename_result
+
+
+  if test -n "$compiler"; then
+    # We don't want -fno-exception when compiling C++ code, so set the
+    # no_builtin_flag separately
+    if test yes = "$GXX"; then
+      lt_prog_compiler_no_builtin_flag_CXX=' -fno-builtin'
+    else
+      lt_prog_compiler_no_builtin_flag_CXX=
+    fi
+
+    if test yes = "$GXX"; then
+      # Set up default GNU C++ configuration
+
+
+
+# Check whether --with-gnu-ld was given.
+if test "${with_gnu_ld+set}" = set; then :
+  withval=$with_gnu_ld; test no = "$withval" || with_gnu_ld=yes
+else
+  with_gnu_ld=no
+fi
+
+ac_prog=ld
+if test yes = "$GCC"; then
+  # Check if gcc -print-prog-name=ld gives a path.
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ld used by $CC" >&5
+$as_echo_n "checking for ld used by $CC... " >&6; }
+  case $host in
+  *-*-mingw*)
+    # gcc leaves a trailing carriage return, which upsets mingw
+    ac_prog=`($CC -print-prog-name=ld) 2>&5 | tr -d '\015'` ;;
+  *)
+    ac_prog=`($CC -print-prog-name=ld) 2>&5` ;;
+  esac
+  case $ac_prog in
+    # Accept absolute paths.
+    [\\/]* | ?:[\\/]*)
+      re_direlt='/[^/][^/]*/\.\./'
+      # Canonicalize the pathname of ld
+      ac_prog=`$ECHO "$ac_prog"| $SED 's%\\\\%/%g'`
+      while $ECHO "$ac_prog" | $GREP "$re_direlt" > /dev/null 2>&1; do
+	ac_prog=`$ECHO $ac_prog| $SED "s%$re_direlt%/%"`
+      done
+      test -z "$LD" && LD=$ac_prog
+      ;;
+  "")
+    # If it fails, then pretend we aren't using GCC.
+    ac_prog=ld
+    ;;
+  *)
+    # If it is relative, then search for the first ld in PATH.
+    with_gnu_ld=unknown
+    ;;
+  esac
+elif test yes = "$with_gnu_ld"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for GNU ld" >&5
+$as_echo_n "checking for GNU ld... " >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for non-GNU ld" >&5
+$as_echo_n "checking for non-GNU ld... " >&6; }
+fi
+if ${lt_cv_path_LD+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -z "$LD"; then
+  lt_save_ifs=$IFS; IFS=$PATH_SEPARATOR
+  for ac_dir in $PATH; do
+    IFS=$lt_save_ifs
+    test -z "$ac_dir" && ac_dir=.
+    if test -f "$ac_dir/$ac_prog" || test -f "$ac_dir/$ac_prog$ac_exeext"; then
+      lt_cv_path_LD=$ac_dir/$ac_prog
+      # Check to see if the program is GNU ld.  I'd rather use --version,
+      # but apparently some variants of GNU ld only accept -v.
+      # Break only if it was the GNU/non-GNU ld that we prefer.
+      case `"$lt_cv_path_LD" -v 2>&1 </dev/null` in
+      *GNU* | *'with BFD'*)
+	test no != "$with_gnu_ld" && break
+	;;
+      *)
+	test yes != "$with_gnu_ld" && break
+	;;
+      esac
+    fi
+  done
+  IFS=$lt_save_ifs
+else
+  lt_cv_path_LD=$LD # Let the user override the test with a path.
+fi
+fi
+
+LD=$lt_cv_path_LD
+if test -n "$LD"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LD" >&5
+$as_echo "$LD" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+test -z "$LD" && as_fn_error $? "no acceptable ld found in \$PATH" "$LINENO" 5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if the linker ($LD) is GNU ld" >&5
+$as_echo_n "checking if the linker ($LD) is GNU ld... " >&6; }
+if ${lt_cv_prog_gnu_ld+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  # I'd rather use --version here, but apparently some GNU lds only accept -v.
+case `$LD -v 2>&1 </dev/null` in
+*GNU* | *'with BFD'*)
+  lt_cv_prog_gnu_ld=yes
+  ;;
+*)
+  lt_cv_prog_gnu_ld=no
+  ;;
+esac
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_gnu_ld" >&5
+$as_echo "$lt_cv_prog_gnu_ld" >&6; }
+with_gnu_ld=$lt_cv_prog_gnu_ld
+
+
+
+
+
+
+
+      # Check if GNU C++ uses GNU ld as the underlying linker, since the
+      # archiving commands below assume that GNU ld is being used.
+      if test yes = "$with_gnu_ld"; then
+        archive_cmds_CXX='$CC $pic_flag -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-soname $wl$soname -o $lib'
+        archive_expsym_cmds_CXX='$CC $pic_flag -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-soname $wl$soname $wl-retain-symbols-file $wl$export_symbols -o $lib'
+
+        hardcode_libdir_flag_spec_CXX='$wl-rpath $wl$libdir'
+        export_dynamic_flag_spec_CXX='$wl--export-dynamic'
+
+        # If archive_cmds runs LD, not CC, wlarc should be empty
+        # XXX I think wlarc can be eliminated in ltcf-cxx, but I need to
+        #     investigate it a little bit more. (MM)
+        wlarc='$wl'
+
+        # ancient GNU ld didn't support --whole-archive et. al.
+        if eval "`$CC -print-prog-name=ld` --help 2>&1" |
+	  $GREP 'no-whole-archive' > /dev/null; then
+          whole_archive_flag_spec_CXX=$wlarc'--whole-archive$convenience '$wlarc'--no-whole-archive'
+        else
+          whole_archive_flag_spec_CXX=
+        fi
+      else
+        with_gnu_ld=no
+        wlarc=
+
+        # A generic and very simple default shared library creation
+        # command for GNU C++ for the case where it uses the native
+        # linker, instead of GNU ld.  If possible, this setting should
+        # overridden to take advantage of the native linker features on
+        # the platform it is being used on.
+        archive_cmds_CXX='$CC -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -o $lib'
+      fi
+
+      # Commands to make compiler produce verbose output that lists
+      # what "hidden" libraries, object files and flags are used when
+      # linking a shared library.
+      output_verbose_link_cmd='$CC -shared $CFLAGS -v conftest.$objext 2>&1 | $GREP -v "^Configured with:" | $GREP "\-L"'
+
+    else
+      GXX=no
+      with_gnu_ld=no
+      wlarc=
+    fi
+
+    # PORTME: fill in a description of your system's C++ link characteristics
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the $compiler linker ($LD) supports shared libraries" >&5
+$as_echo_n "checking whether the $compiler linker ($LD) supports shared libraries... " >&6; }
+    ld_shlibs_CXX=yes
+    case $host_os in
+      aix3*)
+        # FIXME: insert proper C++ library support
+        ld_shlibs_CXX=no
+        ;;
+      aix[4-9]*)
+        if test ia64 = "$host_cpu"; then
+          # On IA64, the linker does run time linking by default, so we don't
+          # have to do anything special.
+          aix_use_runtimelinking=no
+          exp_sym_flag='-Bexport'
+          no_entry_flag=
+        else
+          aix_use_runtimelinking=no
+
+          # Test if we are trying to use run time linking or normal
+          # AIX style linking. If -brtl is somewhere in LDFLAGS, we
+          # have runtime linking enabled, and use it for executables.
+          # For shared libraries, we enable/disable runtime linking
+          # depending on the kind of the shared library created -
+          # when "with_aix_soname,aix_use_runtimelinking" is:
+          # "aix,no"   lib.a(lib.so.V) shared, rtl:no,  for executables
+          # "aix,yes"  lib.so          shared, rtl:yes, for executables
+          #            lib.a           static archive
+          # "both,no"  lib.so.V(shr.o) shared, rtl:yes
+          #            lib.a(lib.so.V) shared, rtl:no,  for executables
+          # "both,yes" lib.so.V(shr.o) shared, rtl:yes, for executables
+          #            lib.a(lib.so.V) shared, rtl:no
+          # "svr4,*"   lib.so.V(shr.o) shared, rtl:yes, for executables
+          #            lib.a           static archive
+          case $host_os in aix4.[23]|aix4.[23].*|aix[5-9]*)
+	    for ld_flag in $LDFLAGS; do
+	      case $ld_flag in
+	      *-brtl*)
+	        aix_use_runtimelinking=yes
+	        break
+	        ;;
+	      esac
+	    done
+	    if test svr4,no = "$with_aix_soname,$aix_use_runtimelinking"; then
+	      # With aix-soname=svr4, we create the lib.so.V shared archives only,
+	      # so we don't have lib.a shared libs to link our executables.
+	      # We have to force runtime linking in this case.
+	      aix_use_runtimelinking=yes
+	      LDFLAGS="$LDFLAGS -Wl,-brtl"
+	    fi
+	    ;;
+          esac
+
+          exp_sym_flag='-bexport'
+          no_entry_flag='-bnoentry'
+        fi
+
+        # When large executables or shared objects are built, AIX ld can
+        # have problems creating the table of contents.  If linking a library
+        # or program results in "error TOC overflow" add -mminimal-toc to
+        # CXXFLAGS/CFLAGS for g++/gcc.  In the cases where that is not
+        # enough to fix the problem, add -Wl,-bbigtoc to LDFLAGS.
+
+        archive_cmds_CXX=''
+        hardcode_direct_CXX=yes
+        hardcode_direct_absolute_CXX=yes
+        hardcode_libdir_separator_CXX=':'
+        link_all_deplibs_CXX=yes
+        file_list_spec_CXX='$wl-f,'
+        case $with_aix_soname,$aix_use_runtimelinking in
+        aix,*) ;;	# no import file
+        svr4,* | *,yes) # use import file
+          # The Import File defines what to hardcode.
+          hardcode_direct_CXX=no
+          hardcode_direct_absolute_CXX=no
+          ;;
+        esac
+
+        if test yes = "$GXX"; then
+          case $host_os in aix4.[012]|aix4.[012].*)
+          # We only want to do this on AIX 4.2 and lower, the check
+          # below for broken collect2 doesn't work under 4.3+
+	  collect2name=`$CC -print-prog-name=collect2`
+	  if test -f "$collect2name" &&
+	     strings "$collect2name" | $GREP resolve_lib_name >/dev/null
+	  then
+	    # We have reworked collect2
+	    :
+	  else
+	    # We have old collect2
+	    hardcode_direct_CXX=unsupported
+	    # It fails to find uninstalled libraries when the uninstalled
+	    # path is not listed in the libpath.  Setting hardcode_minus_L
+	    # to unsupported forces relinking
+	    hardcode_minus_L_CXX=yes
+	    hardcode_libdir_flag_spec_CXX='-L$libdir'
+	    hardcode_libdir_separator_CXX=
+	  fi
+          esac
+          shared_flag='-shared'
+	  if test yes = "$aix_use_runtimelinking"; then
+	    shared_flag=$shared_flag' $wl-G'
+	  fi
+	  # Need to ensure runtime linking is disabled for the traditional
+	  # shared library, or the linker may eventually find shared libraries
+	  # /with/ Import File - we do not want to mix them.
+	  shared_flag_aix='-shared'
+	  shared_flag_svr4='-shared $wl-G'
+        else
+          # not using gcc
+          if test ia64 = "$host_cpu"; then
+	  # VisualAge C++, Version 5.5 for AIX 5L for IA-64, Beta 3 Release
+	  # chokes on -Wl,-G. The following line is correct:
+	  shared_flag='-G'
+          else
+	    if test yes = "$aix_use_runtimelinking"; then
+	      shared_flag='$wl-G'
+	    else
+	      shared_flag='$wl-bM:SRE'
+	    fi
+	    shared_flag_aix='$wl-bM:SRE'
+	    shared_flag_svr4='$wl-G'
+          fi
+        fi
+
+        export_dynamic_flag_spec_CXX='$wl-bexpall'
+        # It seems that -bexpall does not export symbols beginning with
+        # underscore (_), so it is better to generate a list of symbols to
+	# export.
+        always_export_symbols_CXX=yes
+	if test aix,yes = "$with_aix_soname,$aix_use_runtimelinking"; then
+          # Warning - without using the other runtime loading flags (-brtl),
+          # -berok will link without error, but may produce a broken library.
+          # The "-G" linker flag allows undefined symbols.
+          no_undefined_flag_CXX='-bernotok'
+          # Determine the default libpath from the value encoded in an empty
+          # executable.
+          if test set = "${lt_cv_aix_libpath+set}"; then
+  aix_libpath=$lt_cv_aix_libpath
+else
+  if ${lt_cv_aix_libpath__CXX+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_cxx_try_link "$LINENO"; then :
+
+  lt_aix_libpath_sed='
+      /Import File Strings/,/^$/ {
+	  /^0/ {
+	      s/^0  *\([^ ]*\) *$/\1/
+	      p
+	  }
+      }'
+  lt_cv_aix_libpath__CXX=`dump -H conftest$ac_exeext 2>/dev/null | $SED -n -e "$lt_aix_libpath_sed"`
+  # Check for a 64-bit object if we didn't find anything.
+  if test -z "$lt_cv_aix_libpath__CXX"; then
+    lt_cv_aix_libpath__CXX=`dump -HX64 conftest$ac_exeext 2>/dev/null | $SED -n -e "$lt_aix_libpath_sed"`
+  fi
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+  if test -z "$lt_cv_aix_libpath__CXX"; then
+    lt_cv_aix_libpath__CXX=/usr/lib:/lib
+  fi
+
+fi
+
+  aix_libpath=$lt_cv_aix_libpath__CXX
+fi
+
+          hardcode_libdir_flag_spec_CXX='$wl-blibpath:$libdir:'"$aix_libpath"
+
+          archive_expsym_cmds_CXX='$CC -o $output_objdir/$soname $libobjs $deplibs $wl'$no_entry_flag' $compiler_flags `if test -n "$allow_undefined_flag"; then func_echo_all "$wl$allow_undefined_flag"; else :; fi` $wl'$exp_sym_flag:\$export_symbols' '$shared_flag
+        else
+          if test ia64 = "$host_cpu"; then
+	    hardcode_libdir_flag_spec_CXX='$wl-R $libdir:/usr/lib:/lib'
+	    allow_undefined_flag_CXX="-z nodefs"
+	    archive_expsym_cmds_CXX="\$CC $shared_flag"' -o $output_objdir/$soname $libobjs $deplibs '"\$wl$no_entry_flag"' $compiler_flags $wl$allow_undefined_flag '"\$wl$exp_sym_flag:\$export_symbols"
+          else
+	    # Determine the default libpath from the value encoded in an
+	    # empty executable.
+	    if test set = "${lt_cv_aix_libpath+set}"; then
+  aix_libpath=$lt_cv_aix_libpath
+else
+  if ${lt_cv_aix_libpath__CXX+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_cxx_try_link "$LINENO"; then :
+
+  lt_aix_libpath_sed='
+      /Import File Strings/,/^$/ {
+	  /^0/ {
+	      s/^0  *\([^ ]*\) *$/\1/
+	      p
+	  }
+      }'
+  lt_cv_aix_libpath__CXX=`dump -H conftest$ac_exeext 2>/dev/null | $SED -n -e "$lt_aix_libpath_sed"`
+  # Check for a 64-bit object if we didn't find anything.
+  if test -z "$lt_cv_aix_libpath__CXX"; then
+    lt_cv_aix_libpath__CXX=`dump -HX64 conftest$ac_exeext 2>/dev/null | $SED -n -e "$lt_aix_libpath_sed"`
+  fi
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+  if test -z "$lt_cv_aix_libpath__CXX"; then
+    lt_cv_aix_libpath__CXX=/usr/lib:/lib
+  fi
+
+fi
+
+  aix_libpath=$lt_cv_aix_libpath__CXX
+fi
+
+	    hardcode_libdir_flag_spec_CXX='$wl-blibpath:$libdir:'"$aix_libpath"
+	    # Warning - without using the other run time loading flags,
+	    # -berok will link without error, but may produce a broken library.
+	    no_undefined_flag_CXX=' $wl-bernotok'
+	    allow_undefined_flag_CXX=' $wl-berok'
+	    if test yes = "$with_gnu_ld"; then
+	      # We only use this code for GNU lds that support --whole-archive.
+	      whole_archive_flag_spec_CXX='$wl--whole-archive$convenience $wl--no-whole-archive'
+	    else
+	      # Exported symbols can be pulled into shared objects from archives
+	      whole_archive_flag_spec_CXX='$convenience'
+	    fi
+	    archive_cmds_need_lc_CXX=yes
+	    archive_expsym_cmds_CXX='$RM -r $output_objdir/$realname.d~$MKDIR $output_objdir/$realname.d'
+	    # -brtl affects multiple linker settings, -berok does not and is overridden later
+	    compiler_flags_filtered='`func_echo_all "$compiler_flags " | $SED -e "s%-brtl\\([, ]\\)%-berok\\1%g"`'
+	    if test svr4 != "$with_aix_soname"; then
+	      # This is similar to how AIX traditionally builds its shared
+	      # libraries. Need -bnortl late, we may have -brtl in LDFLAGS.
+	      archive_expsym_cmds_CXX="$archive_expsym_cmds_CXX"'~$CC '$shared_flag_aix' -o $output_objdir/$realname.d/$soname $libobjs $deplibs $wl-bnoentry '$compiler_flags_filtered'$wl-bE:$export_symbols$allow_undefined_flag~$AR $AR_FLAGS $output_objdir/$libname$release.a $output_objdir/$realname.d/$soname'
+	    fi
+	    if test aix != "$with_aix_soname"; then
+	      archive_expsym_cmds_CXX="$archive_expsym_cmds_CXX"'~$CC '$shared_flag_svr4' -o $output_objdir/$realname.d/$shared_archive_member_spec.o $libobjs $deplibs $wl-bnoentry '$compiler_flags_filtered'$wl-bE:$export_symbols$allow_undefined_flag~$STRIP -e $output_objdir/$realname.d/$shared_archive_member_spec.o~( func_echo_all "#! $soname($shared_archive_member_spec.o)"; if test shr_64 = "$shared_archive_member_spec"; then func_echo_all "# 64"; else func_echo_all "# 32"; fi; cat $export_symbols ) > $output_objdir/$realname.d/$shared_archive_member_spec.imp~$AR $AR_FLAGS $output_objdir/$soname $output_objdir/$realname.d/$shared_archive_member_spec.o $output_objdir/$realname.d/$shared_archive_member_spec.imp'
+	    else
+	      # used by -dlpreopen to get the symbols
+	      archive_expsym_cmds_CXX="$archive_expsym_cmds_CXX"'~$MV  $output_objdir/$realname.d/$soname $output_objdir'
+	    fi
+	    archive_expsym_cmds_CXX="$archive_expsym_cmds_CXX"'~$RM -r $output_objdir/$realname.d'
+          fi
+        fi
+        ;;
+
+      beos*)
+	if $LD --help 2>&1 | $GREP ': supported targets:.* elf' > /dev/null; then
+	  allow_undefined_flag_CXX=unsupported
+	  # Joseph Beckenbach <jrb3@best.com> says some releases of gcc
+	  # support --undefined.  This deserves some investigation.  FIXME
+	  archive_cmds_CXX='$CC -nostart $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib'
+	else
+	  ld_shlibs_CXX=no
+	fi
+	;;
+
+      chorus*)
+        case $cc_basename in
+          *)
+	  # FIXME: insert proper C++ library support
+	  ld_shlibs_CXX=no
+	  ;;
+        esac
+        ;;
+
+      cygwin* | mingw* | pw32* | cegcc*)
+	case $GXX,$cc_basename in
+	,cl* | no,cl*)
+	  # Native MSVC
+	  # hardcode_libdir_flag_spec is actually meaningless, as there is
+	  # no search path for DLLs.
+	  hardcode_libdir_flag_spec_CXX=' '
+	  allow_undefined_flag_CXX=unsupported
+	  always_export_symbols_CXX=yes
+	  file_list_spec_CXX='@'
+	  # Tell ltmain to make .lib files, not .a files.
+	  libext=lib
+	  # Tell ltmain to make .dll files, not .so files.
+	  shrext_cmds=.dll
+	  # FIXME: Setting linknames here is a bad hack.
+	  archive_cmds_CXX='$CC -o $output_objdir/$soname $libobjs $compiler_flags $deplibs -Wl,-DLL,-IMPLIB:"$tool_output_objdir$libname.dll.lib"~linknames='
+	  archive_expsym_cmds_CXX='if   test DEF = "`$SED -n     -e '\''s/^[	 ]*//'\''     -e '\''/^\(;.*\)*$/d'\''     -e '\''s/^\(EXPORTS\|LIBRARY\)\([	 ].*\)*$/DEF/p'\''     -e q     $export_symbols`" ; then
+              cp "$export_symbols" "$output_objdir/$soname.def";
+              echo "$tool_output_objdir$soname.def" > "$output_objdir/$soname.exp";
+            else
+              $SED -e '\''s/^/-link -EXPORT:/'\'' < $export_symbols > $output_objdir/$soname.exp;
+            fi~
+            $CC -o $tool_output_objdir$soname $libobjs $compiler_flags $deplibs "@$tool_output_objdir$soname.exp" -Wl,-DLL,-IMPLIB:"$tool_output_objdir$libname.dll.lib"~
+            linknames='
+	  # The linker will not automatically build a static lib if we build a DLL.
+	  # _LT_TAGVAR(old_archive_from_new_cmds, CXX)='true'
+	  enable_shared_with_static_runtimes_CXX=yes
+	  # Don't use ranlib
+	  old_postinstall_cmds_CXX='chmod 644 $oldlib'
+	  postlink_cmds_CXX='lt_outputfile="@OUTPUT@"~
+            lt_tool_outputfile="@TOOL_OUTPUT@"~
+            case $lt_outputfile in
+              *.exe|*.EXE) ;;
+              *)
+                lt_outputfile=$lt_outputfile.exe
+                lt_tool_outputfile=$lt_tool_outputfile.exe
+                ;;
+            esac~
+            func_to_tool_file "$lt_outputfile"~
+            if test : != "$MANIFEST_TOOL" && test -f "$lt_outputfile.manifest"; then
+              $MANIFEST_TOOL -manifest "$lt_tool_outputfile.manifest" -outputresource:"$lt_tool_outputfile" || exit 1;
+              $RM "$lt_outputfile.manifest";
+            fi'
+	  ;;
+	*)
+	  # g++
+	  # _LT_TAGVAR(hardcode_libdir_flag_spec, CXX) is actually meaningless,
+	  # as there is no search path for DLLs.
+	  hardcode_libdir_flag_spec_CXX='-L$libdir'
+	  export_dynamic_flag_spec_CXX='$wl--export-all-symbols'
+	  allow_undefined_flag_CXX=unsupported
+	  always_export_symbols_CXX=no
+	  enable_shared_with_static_runtimes_CXX=yes
+
+	  if $LD --help 2>&1 | $GREP 'auto-import' > /dev/null; then
+	    archive_cmds_CXX='$CC -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -o $output_objdir/$soname $wl--enable-auto-image-base -Xlinker --out-implib -Xlinker $lib'
+	    # If the export-symbols file already is a .def file, use it as
+	    # is; otherwise, prepend EXPORTS...
+	    archive_expsym_cmds_CXX='if   test DEF = "`$SED -n     -e '\''s/^[	 ]*//'\''     -e '\''/^\(;.*\)*$/d'\''     -e '\''s/^\(EXPORTS\|LIBRARY\)\([	 ].*\)*$/DEF/p'\''     -e q     $export_symbols`" ; then
+              cp $export_symbols $output_objdir/$soname.def;
+            else
+              echo EXPORTS > $output_objdir/$soname.def;
+              cat $export_symbols >> $output_objdir/$soname.def;
+            fi~
+            $CC -shared -nostdlib $output_objdir/$soname.def $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -o $output_objdir/$soname $wl--enable-auto-image-base -Xlinker --out-implib -Xlinker $lib'
+	  else
+	    ld_shlibs_CXX=no
+	  fi
+	  ;;
+	esac
+	;;
+      darwin* | rhapsody*)
+
+
+  archive_cmds_need_lc_CXX=no
+  hardcode_direct_CXX=no
+  hardcode_automatic_CXX=yes
+  hardcode_shlibpath_var_CXX=unsupported
+  if test yes = "$lt_cv_ld_force_load"; then
+    whole_archive_flag_spec_CXX='`for conv in $convenience\"\"; do test  -n \"$conv\" && new_convenience=\"$new_convenience $wl-force_load,$conv\"; done; func_echo_all \"$new_convenience\"`'
+
+  else
+    whole_archive_flag_spec_CXX=''
+  fi
+  link_all_deplibs_CXX=yes
+  allow_undefined_flag_CXX=$_lt_dar_allow_undefined
+  case $cc_basename in
+     ifort*|nagfor*) _lt_dar_can_shared=yes ;;
+     *) _lt_dar_can_shared=$GCC ;;
+  esac
+  if test yes = "$_lt_dar_can_shared"; then
+    output_verbose_link_cmd=func_echo_all
+    archive_cmds_CXX="\$CC -dynamiclib \$allow_undefined_flag -o \$lib \$libobjs \$deplibs \$compiler_flags -install_name \$rpath/\$soname \$verstring $_lt_dar_single_mod$_lt_dsymutil"
+    module_cmds_CXX="\$CC \$allow_undefined_flag -o \$lib -bundle \$libobjs \$deplibs \$compiler_flags$_lt_dsymutil"
+    archive_expsym_cmds_CXX="sed 's|^|_|' < \$export_symbols > \$output_objdir/\$libname-symbols.expsym~\$CC -dynamiclib \$allow_undefined_flag -o \$lib \$libobjs \$deplibs \$compiler_flags -install_name \$rpath/\$soname \$verstring $_lt_dar_single_mod$_lt_dar_export_syms$_lt_dsymutil"
+    module_expsym_cmds_CXX="sed -e 's|^|_|' < \$export_symbols > \$output_objdir/\$libname-symbols.expsym~\$CC \$allow_undefined_flag -o \$lib -bundle \$libobjs \$deplibs \$compiler_flags$_lt_dar_export_syms$_lt_dsymutil"
+       if test yes != "$lt_cv_apple_cc_single_mod"; then
+      archive_cmds_CXX="\$CC -r -keep_private_externs -nostdlib -o \$lib-master.o \$libobjs~\$CC -dynamiclib \$allow_undefined_flag -o \$lib \$lib-master.o \$deplibs \$compiler_flags -install_name \$rpath/\$soname \$verstring$_lt_dsymutil"
+      archive_expsym_cmds_CXX="sed 's|^|_|' < \$export_symbols > \$output_objdir/\$libname-symbols.expsym~\$CC -r -keep_private_externs -nostdlib -o \$lib-master.o \$libobjs~\$CC -dynamiclib \$allow_undefined_flag -o \$lib \$lib-master.o \$deplibs \$compiler_flags -install_name \$rpath/\$soname \$verstring$_lt_dar_export_syms$_lt_dsymutil"
+    fi
+
+  else
+  ld_shlibs_CXX=no
+  fi
+
+	;;
+
+      os2*)
+	hardcode_libdir_flag_spec_CXX='-L$libdir'
+	hardcode_minus_L_CXX=yes
+	allow_undefined_flag_CXX=unsupported
+	shrext_cmds=.dll
+	archive_cmds_CXX='$ECHO "LIBRARY ${soname%$shared_ext} INITINSTANCE TERMINSTANCE" > $output_objdir/$libname.def~
+	  $ECHO "DESCRIPTION \"$libname\"" >> $output_objdir/$libname.def~
+	  $ECHO "DATA MULTIPLE NONSHARED" >> $output_objdir/$libname.def~
+	  $ECHO EXPORTS >> $output_objdir/$libname.def~
+	  emxexp $libobjs | $SED /"_DLL_InitTerm"/d >> $output_objdir/$libname.def~
+	  $CC -Zdll -Zcrtdll -o $output_objdir/$soname $libobjs $deplibs $compiler_flags $output_objdir/$libname.def~
+	  emximp -o $lib $output_objdir/$libname.def'
+	archive_expsym_cmds_CXX='$ECHO "LIBRARY ${soname%$shared_ext} INITINSTANCE TERMINSTANCE" > $output_objdir/$libname.def~
+	  $ECHO "DESCRIPTION \"$libname\"" >> $output_objdir/$libname.def~
+	  $ECHO "DATA MULTIPLE NONSHARED" >> $output_objdir/$libname.def~
+	  $ECHO EXPORTS >> $output_objdir/$libname.def~
+	  prefix_cmds="$SED"~
+	  if test EXPORTS = "`$SED 1q $export_symbols`"; then
+	    prefix_cmds="$prefix_cmds -e 1d";
+	  fi~
+	  prefix_cmds="$prefix_cmds -e \"s/^\(.*\)$/_\1/g\""~
+	  cat $export_symbols | $prefix_cmds >> $output_objdir/$libname.def~
+	  $CC -Zdll -Zcrtdll -o $output_objdir/$soname $libobjs $deplibs $compiler_flags $output_objdir/$libname.def~
+	  emximp -o $lib $output_objdir/$libname.def'
+	old_archive_From_new_cmds_CXX='emximp -o $output_objdir/${libname}_dll.a $output_objdir/$libname.def'
+	enable_shared_with_static_runtimes_CXX=yes
+	;;
+
+      dgux*)
+        case $cc_basename in
+          ec++*)
+	    # FIXME: insert proper C++ library support
+	    ld_shlibs_CXX=no
+	    ;;
+          ghcx*)
+	    # Green Hills C++ Compiler
+	    # FIXME: insert proper C++ library support
+	    ld_shlibs_CXX=no
+	    ;;
+          *)
+	    # FIXME: insert proper C++ library support
+	    ld_shlibs_CXX=no
+	    ;;
+        esac
+        ;;
+
+      freebsd2.*)
+        # C++ shared libraries reported to be fairly broken before
+	# switch to ELF
+        ld_shlibs_CXX=no
+        ;;
+
+      freebsd-elf*)
+        archive_cmds_need_lc_CXX=no
+        ;;
+
+      freebsd* | dragonfly*)
+        # FreeBSD 3 and later use GNU C++ and GNU ld with standard ELF
+        # conventions
+        ld_shlibs_CXX=yes
+        ;;
+
+      haiku*)
+        archive_cmds_CXX='$CC -shared $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib'
+        link_all_deplibs_CXX=yes
+        ;;
+
+      hpux9*)
+        hardcode_libdir_flag_spec_CXX='$wl+b $wl$libdir'
+        hardcode_libdir_separator_CXX=:
+        export_dynamic_flag_spec_CXX='$wl-E'
+        hardcode_direct_CXX=yes
+        hardcode_minus_L_CXX=yes # Not in the search PATH,
+				             # but as the default
+				             # location of the library.
+
+        case $cc_basename in
+          CC*)
+            # FIXME: insert proper C++ library support
+            ld_shlibs_CXX=no
+            ;;
+          aCC*)
+            archive_cmds_CXX='$RM $output_objdir/$soname~$CC -b $wl+b $wl$install_libdir -o $output_objdir/$soname $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags~test "x$output_objdir/$soname" = "x$lib" || mv $output_objdir/$soname $lib'
+            # Commands to make compiler produce verbose output that lists
+            # what "hidden" libraries, object files and flags are used when
+            # linking a shared library.
+            #
+            # There doesn't appear to be a way to prevent this compiler from
+            # explicitly linking system object files so we need to strip them
+            # from the output so that they don't get included in the library
+            # dependencies.
+            output_verbose_link_cmd='templist=`($CC -b $CFLAGS -v conftest.$objext 2>&1) | $EGREP "\-L"`; list= ; for z in $templist; do case $z in conftest.$objext) list="$list $z";; *.$objext);; *) list="$list $z";;esac; done; func_echo_all "$list"'
+            ;;
+          *)
+            if test yes = "$GXX"; then
+              archive_cmds_CXX='$RM $output_objdir/$soname~$CC -shared -nostdlib $pic_flag $wl+b $wl$install_libdir -o $output_objdir/$soname $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags~test "x$output_objdir/$soname" = "x$lib" || mv $output_objdir/$soname $lib'
+            else
+              # FIXME: insert proper C++ library support
+              ld_shlibs_CXX=no
+            fi
+            ;;
+        esac
+        ;;
+
+      hpux10*|hpux11*)
+        if test no = "$with_gnu_ld"; then
+	  hardcode_libdir_flag_spec_CXX='$wl+b $wl$libdir'
+	  hardcode_libdir_separator_CXX=:
+
+          case $host_cpu in
+            hppa*64*|ia64*)
+              ;;
+            *)
+	      export_dynamic_flag_spec_CXX='$wl-E'
+              ;;
+          esac
+        fi
+        case $host_cpu in
+          hppa*64*|ia64*)
+            hardcode_direct_CXX=no
+            hardcode_shlibpath_var_CXX=no
+            ;;
+          *)
+            hardcode_direct_CXX=yes
+            hardcode_direct_absolute_CXX=yes
+            hardcode_minus_L_CXX=yes # Not in the search PATH,
+					         # but as the default
+					         # location of the library.
+            ;;
+        esac
+
+        case $cc_basename in
+          CC*)
+	    # FIXME: insert proper C++ library support
+	    ld_shlibs_CXX=no
+	    ;;
+          aCC*)
+	    case $host_cpu in
+	      hppa*64*)
+	        archive_cmds_CXX='$CC -b $wl+h $wl$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags'
+	        ;;
+	      ia64*)
+	        archive_cmds_CXX='$CC -b $wl+h $wl$soname $wl+nodefaultrpath -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags'
+	        ;;
+	      *)
+	        archive_cmds_CXX='$CC -b $wl+h $wl$soname $wl+b $wl$install_libdir -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags'
+	        ;;
+	    esac
+	    # Commands to make compiler produce verbose output that lists
+	    # what "hidden" libraries, object files and flags are used when
+	    # linking a shared library.
+	    #
+	    # There doesn't appear to be a way to prevent this compiler from
+	    # explicitly linking system object files so we need to strip them
+	    # from the output so that they don't get included in the library
+	    # dependencies.
+	    output_verbose_link_cmd='templist=`($CC -b $CFLAGS -v conftest.$objext 2>&1) | $GREP "\-L"`; list= ; for z in $templist; do case $z in conftest.$objext) list="$list $z";; *.$objext);; *) list="$list $z";;esac; done; func_echo_all "$list"'
+	    ;;
+          *)
+	    if test yes = "$GXX"; then
+	      if test no = "$with_gnu_ld"; then
+	        case $host_cpu in
+	          hppa*64*)
+	            archive_cmds_CXX='$CC -shared -nostdlib -fPIC $wl+h $wl$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags'
+	            ;;
+	          ia64*)
+	            archive_cmds_CXX='$CC -shared -nostdlib $pic_flag $wl+h $wl$soname $wl+nodefaultrpath -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags'
+	            ;;
+	          *)
+	            archive_cmds_CXX='$CC -shared -nostdlib $pic_flag $wl+h $wl$soname $wl+b $wl$install_libdir -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags'
+	            ;;
+	        esac
+	      fi
+	    else
+	      # FIXME: insert proper C++ library support
+	      ld_shlibs_CXX=no
+	    fi
+	    ;;
+        esac
+        ;;
+
+      interix[3-9]*)
+	hardcode_direct_CXX=no
+	hardcode_shlibpath_var_CXX=no
+	hardcode_libdir_flag_spec_CXX='$wl-rpath,$libdir'
+	export_dynamic_flag_spec_CXX='$wl-E'
+	# Hack: On Interix 3.x, we cannot compile PIC because of a broken gcc.
+	# Instead, shared libraries are loaded at an image base (0x10000000 by
+	# default) and relocated if they conflict, which is a slow very memory
+	# consuming and fragmenting process.  To avoid this, we pick a random,
+	# 256 KiB-aligned image base between 0x50000000 and 0x6FFC0000 at link
+	# time.  Moving up from 0x10000000 also allows more sbrk(2) space.
+	archive_cmds_CXX='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-h,$soname $wl--image-base,`expr ${RANDOM-$$} % 4096 / 2 \* 262144 + 1342177280` -o $lib'
+	archive_expsym_cmds_CXX='sed "s|^|_|" $export_symbols >$output_objdir/$soname.expsym~$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-h,$soname $wl--retain-symbols-file,$output_objdir/$soname.expsym $wl--image-base,`expr ${RANDOM-$$} % 4096 / 2 \* 262144 + 1342177280` -o $lib'
+	;;
+      irix5* | irix6*)
+        case $cc_basename in
+          CC*)
+	    # SGI C++
+	    archive_cmds_CXX='$CC -shared -all -multigot $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -soname $soname `test -n "$verstring" && func_echo_all "-set_version $verstring"` -update_registry $output_objdir/so_locations -o $lib'
+
+	    # Archives containing C++ object files must be created using
+	    # "CC -ar", where "CC" is the IRIX C++ compiler.  This is
+	    # necessary to make sure instantiated templates are included
+	    # in the archive.
+	    old_archive_cmds_CXX='$CC -ar -WR,-u -o $oldlib $oldobjs'
+	    ;;
+          *)
+	    if test yes = "$GXX"; then
+	      if test no = "$with_gnu_ld"; then
+	        archive_cmds_CXX='$CC -shared $pic_flag -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-soname $wl$soname `test -n "$verstring" && func_echo_all "$wl-set_version $wl$verstring"` $wl-update_registry $wl$output_objdir/so_locations -o $lib'
+	      else
+	        archive_cmds_CXX='$CC -shared $pic_flag -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-soname $wl$soname `test -n "$verstring" && func_echo_all "$wl-set_version $wl$verstring"` -o $lib'
+	      fi
+	    fi
+	    link_all_deplibs_CXX=yes
+	    ;;
+        esac
+        hardcode_libdir_flag_spec_CXX='$wl-rpath $wl$libdir'
+        hardcode_libdir_separator_CXX=:
+        inherit_rpath_CXX=yes
+        ;;
+
+      linux* | k*bsd*-gnu | kopensolaris*-gnu | gnu*)
+        case $cc_basename in
+          KCC*)
+	    # Kuck and Associates, Inc. (KAI) C++ Compiler
+
+	    # KCC will only create a shared library if the output file
+	    # ends with ".so" (or ".sl" for HP-UX), so rename the library
+	    # to its proper name (with version) after linking.
+	    archive_cmds_CXX='tempext=`echo $shared_ext | $SED -e '\''s/\([^()0-9A-Za-z{}]\)/\\\\\1/g'\''`; templib=`echo $lib | $SED -e "s/\$tempext\..*/.so/"`; $CC $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags --soname $soname -o \$templib; mv \$templib $lib'
+	    archive_expsym_cmds_CXX='tempext=`echo $shared_ext | $SED -e '\''s/\([^()0-9A-Za-z{}]\)/\\\\\1/g'\''`; templib=`echo $lib | $SED -e "s/\$tempext\..*/.so/"`; $CC $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags --soname $soname -o \$templib $wl-retain-symbols-file,$export_symbols; mv \$templib $lib'
+	    # Commands to make compiler produce verbose output that lists
+	    # what "hidden" libraries, object files and flags are used when
+	    # linking a shared library.
+	    #
+	    # There doesn't appear to be a way to prevent this compiler from
+	    # explicitly linking system object files so we need to strip them
+	    # from the output so that they don't get included in the library
+	    # dependencies.
+	    output_verbose_link_cmd='templist=`$CC $CFLAGS -v conftest.$objext -o libconftest$shared_ext 2>&1 | $GREP "ld"`; rm -f libconftest$shared_ext; list= ; for z in $templist; do case $z in conftest.$objext) list="$list $z";; *.$objext);; *) list="$list $z";;esac; done; func_echo_all "$list"'
+
+	    hardcode_libdir_flag_spec_CXX='$wl-rpath,$libdir'
+	    export_dynamic_flag_spec_CXX='$wl--export-dynamic'
+
+	    # Archives containing C++ object files must be created using
+	    # "CC -Bstatic", where "CC" is the KAI C++ compiler.
+	    old_archive_cmds_CXX='$CC -Bstatic -o $oldlib $oldobjs'
+	    ;;
+	  icpc* | ecpc* )
+	    # Intel C++
+	    with_gnu_ld=yes
+	    # version 8.0 and above of icpc choke on multiply defined symbols
+	    # if we add $predep_objects and $postdep_objects, however 7.1 and
+	    # earlier do not add the objects themselves.
+	    case `$CC -V 2>&1` in
+	      *"Version 7."*)
+	        archive_cmds_CXX='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-soname $wl$soname -o $lib'
+		archive_expsym_cmds_CXX='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-soname $wl$soname $wl-retain-symbols-file $wl$export_symbols -o $lib'
+		;;
+	      *)  # Version 8.0 or newer
+	        tmp_idyn=
+	        case $host_cpu in
+		  ia64*) tmp_idyn=' -i_dynamic';;
+		esac
+	        archive_cmds_CXX='$CC -shared'"$tmp_idyn"' $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib'
+		archive_expsym_cmds_CXX='$CC -shared'"$tmp_idyn"' $libobjs $deplibs $compiler_flags $wl-soname $wl$soname $wl-retain-symbols-file $wl$export_symbols -o $lib'
+		;;
+	    esac
+	    archive_cmds_need_lc_CXX=no
+	    hardcode_libdir_flag_spec_CXX='$wl-rpath,$libdir'
+	    export_dynamic_flag_spec_CXX='$wl--export-dynamic'
+	    whole_archive_flag_spec_CXX='$wl--whole-archive$convenience $wl--no-whole-archive'
+	    ;;
+          pgCC* | pgcpp*)
+            # Portland Group C++ compiler
+	    case `$CC -V` in
+	    *pgCC\ [1-5].* | *pgcpp\ [1-5].*)
+	      prelink_cmds_CXX='tpldir=Template.dir~
+               rm -rf $tpldir~
+               $CC --prelink_objects --instantiation_dir $tpldir $objs $libobjs $compile_deplibs~
+               compile_command="$compile_command `find $tpldir -name \*.o | sort | $NL2SP`"'
+	      old_archive_cmds_CXX='tpldir=Template.dir~
+                rm -rf $tpldir~
+                $CC --prelink_objects --instantiation_dir $tpldir $oldobjs$old_deplibs~
+                $AR $AR_FLAGS $oldlib$oldobjs$old_deplibs `find $tpldir -name \*.o | sort | $NL2SP`~
+                $RANLIB $oldlib'
+	      archive_cmds_CXX='tpldir=Template.dir~
+                rm -rf $tpldir~
+                $CC --prelink_objects --instantiation_dir $tpldir $predep_objects $libobjs $deplibs $convenience $postdep_objects~
+                $CC -shared $pic_flag $predep_objects $libobjs $deplibs `find $tpldir -name \*.o | sort | $NL2SP` $postdep_objects $compiler_flags $wl-soname $wl$soname -o $lib'
+	      archive_expsym_cmds_CXX='tpldir=Template.dir~
+                rm -rf $tpldir~
+                $CC --prelink_objects --instantiation_dir $tpldir $predep_objects $libobjs $deplibs $convenience $postdep_objects~
+                $CC -shared $pic_flag $predep_objects $libobjs $deplibs `find $tpldir -name \*.o | sort | $NL2SP` $postdep_objects $compiler_flags $wl-soname $wl$soname $wl-retain-symbols-file $wl$export_symbols -o $lib'
+	      ;;
+	    *) # Version 6 and above use weak symbols
+	      archive_cmds_CXX='$CC -shared $pic_flag $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-soname $wl$soname -o $lib'
+	      archive_expsym_cmds_CXX='$CC -shared $pic_flag $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-soname $wl$soname $wl-retain-symbols-file $wl$export_symbols -o $lib'
+	      ;;
+	    esac
+
+	    hardcode_libdir_flag_spec_CXX='$wl--rpath $wl$libdir'
+	    export_dynamic_flag_spec_CXX='$wl--export-dynamic'
+	    whole_archive_flag_spec_CXX='$wl--whole-archive`for conv in $convenience\"\"; do test  -n \"$conv\" && new_convenience=\"$new_convenience,$conv\"; done; func_echo_all \"$new_convenience\"` $wl--no-whole-archive'
+            ;;
+	  cxx*)
+	    # Compaq C++
+	    archive_cmds_CXX='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-soname $wl$soname -o $lib'
+	    archive_expsym_cmds_CXX='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-soname $wl$soname  -o $lib $wl-retain-symbols-file $wl$export_symbols'
+
+	    runpath_var=LD_RUN_PATH
+	    hardcode_libdir_flag_spec_CXX='-rpath $libdir'
+	    hardcode_libdir_separator_CXX=:
+
+	    # Commands to make compiler produce verbose output that lists
+	    # what "hidden" libraries, object files and flags are used when
+	    # linking a shared library.
+	    #
+	    # There doesn't appear to be a way to prevent this compiler from
+	    # explicitly linking system object files so we need to strip them
+	    # from the output so that they don't get included in the library
+	    # dependencies.
+	    output_verbose_link_cmd='templist=`$CC -shared $CFLAGS -v conftest.$objext 2>&1 | $GREP "ld"`; templist=`func_echo_all "$templist" | $SED "s/\(^.*ld.*\)\( .*ld .*$\)/\1/"`; list= ; for z in $templist; do case $z in conftest.$objext) list="$list $z";; *.$objext);; *) list="$list $z";;esac; done; func_echo_all "X$list" | $Xsed'
+	    ;;
+	  xl* | mpixl* | bgxl*)
+	    # IBM XL 8.0 on PPC, with GNU ld
+	    hardcode_libdir_flag_spec_CXX='$wl-rpath $wl$libdir'
+	    export_dynamic_flag_spec_CXX='$wl--export-dynamic'
+	    archive_cmds_CXX='$CC -qmkshrobj $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib'
+	    if test yes = "$supports_anon_versioning"; then
+	      archive_expsym_cmds_CXX='echo "{ global:" > $output_objdir/$libname.ver~
+                cat $export_symbols | sed -e "s/\(.*\)/\1;/" >> $output_objdir/$libname.ver~
+                echo "local: *; };" >> $output_objdir/$libname.ver~
+                $CC -qmkshrobj $libobjs $deplibs $compiler_flags $wl-soname $wl$soname $wl-version-script $wl$output_objdir/$libname.ver -o $lib'
+	    fi
+	    ;;
+	  *)
+	    case `$CC -V 2>&1 | sed 5q` in
+	    *Sun\ C*)
+	      # Sun C++ 5.9
+	      no_undefined_flag_CXX=' -zdefs'
+	      archive_cmds_CXX='$CC -G$allow_undefined_flag -h$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags'
+	      archive_expsym_cmds_CXX='$CC -G$allow_undefined_flag -h$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-retain-symbols-file $wl$export_symbols'
+	      hardcode_libdir_flag_spec_CXX='-R$libdir'
+	      whole_archive_flag_spec_CXX='$wl--whole-archive`new_convenience=; for conv in $convenience\"\"; do test -z \"$conv\" || new_convenience=\"$new_convenience,$conv\"; done; func_echo_all \"$new_convenience\"` $wl--no-whole-archive'
+	      compiler_needs_object_CXX=yes
+
+	      # Not sure whether something based on
+	      # $CC $CFLAGS -v conftest.$objext -o libconftest$shared_ext 2>&1
+	      # would be better.
+	      output_verbose_link_cmd='func_echo_all'
+
+	      # Archives containing C++ object files must be created using
+	      # "CC -xar", where "CC" is the Sun C++ compiler.  This is
+	      # necessary to make sure instantiated templates are included
+	      # in the archive.
+	      old_archive_cmds_CXX='$CC -xar -o $oldlib $oldobjs'
+	      ;;
+	    esac
+	    ;;
+	esac
+	;;
+
+      lynxos*)
+        # FIXME: insert proper C++ library support
+	ld_shlibs_CXX=no
+	;;
+
+      m88k*)
+        # FIXME: insert proper C++ library support
+        ld_shlibs_CXX=no
+	;;
+
+      mvs*)
+        case $cc_basename in
+          cxx*)
+	    # FIXME: insert proper C++ library support
+	    ld_shlibs_CXX=no
+	    ;;
+	  *)
+	    # FIXME: insert proper C++ library support
+	    ld_shlibs_CXX=no
+	    ;;
+	esac
+	;;
+
+      netbsd*)
+        if echo __ELF__ | $CC -E - | $GREP __ELF__ >/dev/null; then
+	  archive_cmds_CXX='$LD -Bshareable  -o $lib $predep_objects $libobjs $deplibs $postdep_objects $linker_flags'
+	  wlarc=
+	  hardcode_libdir_flag_spec_CXX='-R$libdir'
+	  hardcode_direct_CXX=yes
+	  hardcode_shlibpath_var_CXX=no
+	fi
+	# Workaround some broken pre-1.5 toolchains
+	output_verbose_link_cmd='$CC -shared $CFLAGS -v conftest.$objext 2>&1 | $GREP conftest.$objext | $SED -e "s:-lgcc -lc -lgcc::"'
+	;;
+
+      *nto* | *qnx*)
+        ld_shlibs_CXX=yes
+	;;
+
+      openbsd* | bitrig*)
+	if test -f /usr/libexec/ld.so; then
+	  hardcode_direct_CXX=yes
+	  hardcode_shlibpath_var_CXX=no
+	  hardcode_direct_absolute_CXX=yes
+	  archive_cmds_CXX='$CC -shared $pic_flag $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -o $lib'
+	  hardcode_libdir_flag_spec_CXX='$wl-rpath,$libdir'
+	  if test -z "`echo __ELF__ | $CC -E - | grep __ELF__`"; then
+	    archive_expsym_cmds_CXX='$CC -shared $pic_flag $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-retain-symbols-file,$export_symbols -o $lib'
+	    export_dynamic_flag_spec_CXX='$wl-E'
+	    whole_archive_flag_spec_CXX=$wlarc'--whole-archive$convenience '$wlarc'--no-whole-archive'
+	  fi
+	  output_verbose_link_cmd=func_echo_all
+	else
+	  ld_shlibs_CXX=no
+	fi
+	;;
+
+      osf3* | osf4* | osf5*)
+        case $cc_basename in
+          KCC*)
+	    # Kuck and Associates, Inc. (KAI) C++ Compiler
+
+	    # KCC will only create a shared library if the output file
+	    # ends with ".so" (or ".sl" for HP-UX), so rename the library
+	    # to its proper name (with version) after linking.
+	    archive_cmds_CXX='tempext=`echo $shared_ext | $SED -e '\''s/\([^()0-9A-Za-z{}]\)/\\\\\1/g'\''`; templib=`echo "$lib" | $SED -e "s/\$tempext\..*/.so/"`; $CC $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags --soname $soname -o \$templib; mv \$templib $lib'
+
+	    hardcode_libdir_flag_spec_CXX='$wl-rpath,$libdir'
+	    hardcode_libdir_separator_CXX=:
+
+	    # Archives containing C++ object files must be created using
+	    # the KAI C++ compiler.
+	    case $host in
+	      osf3*) old_archive_cmds_CXX='$CC -Bstatic -o $oldlib $oldobjs' ;;
+	      *) old_archive_cmds_CXX='$CC -o $oldlib $oldobjs' ;;
+	    esac
+	    ;;
+          RCC*)
+	    # Rational C++ 2.4.1
+	    # FIXME: insert proper C++ library support
+	    ld_shlibs_CXX=no
+	    ;;
+          cxx*)
+	    case $host in
+	      osf3*)
+	        allow_undefined_flag_CXX=' $wl-expect_unresolved $wl\*'
+	        archive_cmds_CXX='$CC -shared$allow_undefined_flag $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-soname $soname `test -n "$verstring" && func_echo_all "$wl-set_version $verstring"` -update_registry $output_objdir/so_locations -o $lib'
+	        hardcode_libdir_flag_spec_CXX='$wl-rpath $wl$libdir'
+		;;
+	      *)
+	        allow_undefined_flag_CXX=' -expect_unresolved \*'
+	        archive_cmds_CXX='$CC -shared$allow_undefined_flag $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -msym -soname $soname `test -n "$verstring" && func_echo_all "-set_version $verstring"` -update_registry $output_objdir/so_locations -o $lib'
+	        archive_expsym_cmds_CXX='for i in `cat $export_symbols`; do printf "%s %s\\n" -exported_symbol "\$i" >> $lib.exp; done~
+                  echo "-hidden">> $lib.exp~
+                  $CC -shared$allow_undefined_flag $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -msym -soname $soname $wl-input $wl$lib.exp  `test -n "$verstring" && $ECHO "-set_version $verstring"` -update_registry $output_objdir/so_locations -o $lib~
+                  $RM $lib.exp'
+	        hardcode_libdir_flag_spec_CXX='-rpath $libdir'
+		;;
+	    esac
+
+	    hardcode_libdir_separator_CXX=:
+
+	    # Commands to make compiler produce verbose output that lists
+	    # what "hidden" libraries, object files and flags are used when
+	    # linking a shared library.
+	    #
+	    # There doesn't appear to be a way to prevent this compiler from
+	    # explicitly linking system object files so we need to strip them
+	    # from the output so that they don't get included in the library
+	    # dependencies.
+	    output_verbose_link_cmd='templist=`$CC -shared $CFLAGS -v conftest.$objext 2>&1 | $GREP "ld" | $GREP -v "ld:"`; templist=`func_echo_all "$templist" | $SED "s/\(^.*ld.*\)\( .*ld.*$\)/\1/"`; list= ; for z in $templist; do case $z in conftest.$objext) list="$list $z";; *.$objext);; *) list="$list $z";;esac; done; func_echo_all "$list"'
+	    ;;
+	  *)
+	    if test yes,no = "$GXX,$with_gnu_ld"; then
+	      allow_undefined_flag_CXX=' $wl-expect_unresolved $wl\*'
+	      case $host in
+	        osf3*)
+	          archive_cmds_CXX='$CC -shared -nostdlib $allow_undefined_flag $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-soname $wl$soname `test -n "$verstring" && func_echo_all "$wl-set_version $wl$verstring"` $wl-update_registry $wl$output_objdir/so_locations -o $lib'
+		  ;;
+	        *)
+	          archive_cmds_CXX='$CC -shared $pic_flag -nostdlib $allow_undefined_flag $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-msym $wl-soname $wl$soname `test -n "$verstring" && func_echo_all "$wl-set_version $wl$verstring"` $wl-update_registry $wl$output_objdir/so_locations -o $lib'
+		  ;;
+	      esac
+
+	      hardcode_libdir_flag_spec_CXX='$wl-rpath $wl$libdir'
+	      hardcode_libdir_separator_CXX=:
+
+	      # Commands to make compiler produce verbose output that lists
+	      # what "hidden" libraries, object files and flags are used when
+	      # linking a shared library.
+	      output_verbose_link_cmd='$CC -shared $CFLAGS -v conftest.$objext 2>&1 | $GREP -v "^Configured with:" | $GREP "\-L"'
+
+	    else
+	      # FIXME: insert proper C++ library support
+	      ld_shlibs_CXX=no
+	    fi
+	    ;;
+        esac
+        ;;
+
+      psos*)
+        # FIXME: insert proper C++ library support
+        ld_shlibs_CXX=no
+        ;;
+
+      sunos4*)
+        case $cc_basename in
+          CC*)
+	    # Sun C++ 4.x
+	    # FIXME: insert proper C++ library support
+	    ld_shlibs_CXX=no
+	    ;;
+          lcc*)
+	    # Lucid
+	    # FIXME: insert proper C++ library support
+	    ld_shlibs_CXX=no
+	    ;;
+          *)
+	    # FIXME: insert proper C++ library support
+	    ld_shlibs_CXX=no
+	    ;;
+        esac
+        ;;
+
+      solaris*)
+        case $cc_basename in
+          CC* | sunCC*)
+	    # Sun C++ 4.2, 5.x and Centerline C++
+            archive_cmds_need_lc_CXX=yes
+	    no_undefined_flag_CXX=' -zdefs'
+	    archive_cmds_CXX='$CC -G$allow_undefined_flag -h$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags'
+	    archive_expsym_cmds_CXX='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~
+              $CC -G$allow_undefined_flag $wl-M $wl$lib.exp -h$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags~$RM $lib.exp'
+
+	    hardcode_libdir_flag_spec_CXX='-R$libdir'
+	    hardcode_shlibpath_var_CXX=no
+	    case $host_os in
+	      solaris2.[0-5] | solaris2.[0-5].*) ;;
+	      *)
+		# The compiler driver will combine and reorder linker options,
+		# but understands '-z linker_flag'.
+	        # Supported since Solaris 2.6 (maybe 2.5.1?)
+		whole_archive_flag_spec_CXX='-z allextract$convenience -z defaultextract'
+	        ;;
+	    esac
+	    link_all_deplibs_CXX=yes
+
+	    output_verbose_link_cmd='func_echo_all'
+
+	    # Archives containing C++ object files must be created using
+	    # "CC -xar", where "CC" is the Sun C++ compiler.  This is
+	    # necessary to make sure instantiated templates are included
+	    # in the archive.
+	    old_archive_cmds_CXX='$CC -xar -o $oldlib $oldobjs'
+	    ;;
+          gcx*)
+	    # Green Hills C++ Compiler
+	    archive_cmds_CXX='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-h $wl$soname -o $lib'
+
+	    # The C++ compiler must be used to create the archive.
+	    old_archive_cmds_CXX='$CC $LDFLAGS -archive -o $oldlib $oldobjs'
+	    ;;
+          *)
+	    # GNU C++ compiler with Solaris linker
+	    if test yes,no = "$GXX,$with_gnu_ld"; then
+	      no_undefined_flag_CXX=' $wl-z ${wl}defs'
+	      if $CC --version | $GREP -v '^2\.7' > /dev/null; then
+	        archive_cmds_CXX='$CC -shared $pic_flag -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-h $wl$soname -o $lib'
+	        archive_expsym_cmds_CXX='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~
+                  $CC -shared $pic_flag -nostdlib $wl-M $wl$lib.exp $wl-h $wl$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags~$RM $lib.exp'
+
+	        # Commands to make compiler produce verbose output that lists
+	        # what "hidden" libraries, object files and flags are used when
+	        # linking a shared library.
+	        output_verbose_link_cmd='$CC -shared $CFLAGS -v conftest.$objext 2>&1 | $GREP -v "^Configured with:" | $GREP "\-L"'
+	      else
+	        # g++ 2.7 appears to require '-G' NOT '-shared' on this
+	        # platform.
+	        archive_cmds_CXX='$CC -G -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-h $wl$soname -o $lib'
+	        archive_expsym_cmds_CXX='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~
+                  $CC -G -nostdlib $wl-M $wl$lib.exp $wl-h $wl$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags~$RM $lib.exp'
+
+	        # Commands to make compiler produce verbose output that lists
+	        # what "hidden" libraries, object files and flags are used when
+	        # linking a shared library.
+	        output_verbose_link_cmd='$CC -G $CFLAGS -v conftest.$objext 2>&1 | $GREP -v "^Configured with:" | $GREP "\-L"'
+	      fi
+
+	      hardcode_libdir_flag_spec_CXX='$wl-R $wl$libdir'
+	      case $host_os in
+		solaris2.[0-5] | solaris2.[0-5].*) ;;
+		*)
+		  whole_archive_flag_spec_CXX='$wl-z ${wl}allextract$convenience $wl-z ${wl}defaultextract'
+		  ;;
+	      esac
+	    fi
+	    ;;
+        esac
+        ;;
+
+    sysv4*uw2* | sysv5OpenUNIX* | sysv5UnixWare7.[01].[10]* | unixware7* | sco3.2v5.0.[024]*)
+      no_undefined_flag_CXX='$wl-z,text'
+      archive_cmds_need_lc_CXX=no
+      hardcode_shlibpath_var_CXX=no
+      runpath_var='LD_RUN_PATH'
+
+      case $cc_basename in
+        CC*)
+	  archive_cmds_CXX='$CC -G $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	  archive_expsym_cmds_CXX='$CC -G $wl-Bexport:$export_symbols $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	  ;;
+	*)
+	  archive_cmds_CXX='$CC -shared $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	  archive_expsym_cmds_CXX='$CC -shared $wl-Bexport:$export_symbols $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	  ;;
+      esac
+      ;;
+
+      sysv5* | sco3.2v5* | sco5v6*)
+	# Note: We CANNOT use -z defs as we might desire, because we do not
+	# link with -lc, and that would cause any symbols used from libc to
+	# always be unresolved, which means just about no library would
+	# ever link correctly.  If we're not using GNU ld we use -z text
+	# though, which does catch some bad symbols but isn't as heavy-handed
+	# as -z defs.
+	no_undefined_flag_CXX='$wl-z,text'
+	allow_undefined_flag_CXX='$wl-z,nodefs'
+	archive_cmds_need_lc_CXX=no
+	hardcode_shlibpath_var_CXX=no
+	hardcode_libdir_flag_spec_CXX='$wl-R,$libdir'
+	hardcode_libdir_separator_CXX=':'
+	link_all_deplibs_CXX=yes
+	export_dynamic_flag_spec_CXX='$wl-Bexport'
+	runpath_var='LD_RUN_PATH'
+
+	case $cc_basename in
+          CC*)
+	    archive_cmds_CXX='$CC -G $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	    archive_expsym_cmds_CXX='$CC -G $wl-Bexport:$export_symbols $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	    old_archive_cmds_CXX='$CC -Tprelink_objects $oldobjs~
+              '"$old_archive_cmds_CXX"
+	    reload_cmds_CXX='$CC -Tprelink_objects $reload_objs~
+              '"$reload_cmds_CXX"
+	    ;;
+	  *)
+	    archive_cmds_CXX='$CC -shared $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	    archive_expsym_cmds_CXX='$CC -shared $wl-Bexport:$export_symbols $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	    ;;
+	esac
+      ;;
+
+      tandem*)
+        case $cc_basename in
+          NCC*)
+	    # NonStop-UX NCC 3.20
+	    # FIXME: insert proper C++ library support
+	    ld_shlibs_CXX=no
+	    ;;
+          *)
+	    # FIXME: insert proper C++ library support
+	    ld_shlibs_CXX=no
+	    ;;
+        esac
+        ;;
+
+      vxworks*)
+        # FIXME: insert proper C++ library support
+        ld_shlibs_CXX=no
+        ;;
+
+      *)
+        # FIXME: insert proper C++ library support
+        ld_shlibs_CXX=no
+        ;;
+    esac
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ld_shlibs_CXX" >&5
+$as_echo "$ld_shlibs_CXX" >&6; }
+    test no = "$ld_shlibs_CXX" && can_build_shared=no
+
+    GCC_CXX=$GXX
+    LD_CXX=$LD
+
+    ## CAVEAT EMPTOR:
+    ## There is no encapsulation within the following macros, do not change
+    ## the running order or otherwise move them around unless you know exactly
+    ## what you are doing...
+    # Dependencies to place before and after the object being linked:
+predep_objects_CXX=
+postdep_objects_CXX=
+predeps_CXX=
+postdeps_CXX=
+compiler_lib_search_path_CXX=
+
+cat > conftest.$ac_ext <<_LT_EOF
+class Foo
+{
+public:
+  Foo (void) { a = 0; }
+private:
+  int a;
+};
+_LT_EOF
+
+
+_lt_libdeps_save_CFLAGS=$CFLAGS
+case "$CC $CFLAGS " in #(
+*\ -flto*\ *) CFLAGS="$CFLAGS -fno-lto" ;;
+*\ -fwhopr*\ *) CFLAGS="$CFLAGS -fno-whopr" ;;
+*\ -fuse-linker-plugin*\ *) CFLAGS="$CFLAGS -fno-use-linker-plugin" ;;
+esac
+
+if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
+  # Parse the compiler output and extract the necessary
+  # objects, libraries and library flags.
+
+  # Sentinel used to keep track of whether or not we are before
+  # the conftest object file.
+  pre_test_object_deps_done=no
+
+  for p in `eval "$output_verbose_link_cmd"`; do
+    case $prev$p in
+
+    -L* | -R* | -l*)
+       # Some compilers place space between "-{L,R}" and the path.
+       # Remove the space.
+       if test x-L = "$p" ||
+          test x-R = "$p"; then
+	 prev=$p
+	 continue
+       fi
+
+       # Expand the sysroot to ease extracting the directories later.
+       if test -z "$prev"; then
+         case $p in
+         -L*) func_stripname_cnf '-L' '' "$p"; prev=-L; p=$func_stripname_result ;;
+         -R*) func_stripname_cnf '-R' '' "$p"; prev=-R; p=$func_stripname_result ;;
+         -l*) func_stripname_cnf '-l' '' "$p"; prev=-l; p=$func_stripname_result ;;
+         esac
+       fi
+       case $p in
+       =*) func_stripname_cnf '=' '' "$p"; p=$lt_sysroot$func_stripname_result ;;
+       esac
+       if test no = "$pre_test_object_deps_done"; then
+	 case $prev in
+	 -L | -R)
+	   # Internal compiler library paths should come after those
+	   # provided the user.  The postdeps already come after the
+	   # user supplied libs so there is no need to process them.
+	   if test -z "$compiler_lib_search_path_CXX"; then
+	     compiler_lib_search_path_CXX=$prev$p
+	   else
+	     compiler_lib_search_path_CXX="${compiler_lib_search_path_CXX} $prev$p"
+	   fi
+	   ;;
+	 # The "-l" case would never come before the object being
+	 # linked, so don't bother handling this case.
+	 esac
+       else
+	 if test -z "$postdeps_CXX"; then
+	   postdeps_CXX=$prev$p
+	 else
+	   postdeps_CXX="${postdeps_CXX} $prev$p"
+	 fi
+       fi
+       prev=
+       ;;
+
+    *.lto.$objext) ;; # Ignore GCC LTO objects
+    *.$objext)
+       # This assumes that the test object file only shows up
+       # once in the compiler output.
+       if test "$p" = "conftest.$objext"; then
+	 pre_test_object_deps_done=yes
+	 continue
+       fi
+
+       if test no = "$pre_test_object_deps_done"; then
+	 if test -z "$predep_objects_CXX"; then
+	   predep_objects_CXX=$p
+	 else
+	   predep_objects_CXX="$predep_objects_CXX $p"
+	 fi
+       else
+	 if test -z "$postdep_objects_CXX"; then
+	   postdep_objects_CXX=$p
+	 else
+	   postdep_objects_CXX="$postdep_objects_CXX $p"
+	 fi
+       fi
+       ;;
+
+    *) ;; # Ignore the rest.
+
+    esac
+  done
+
+  # Clean up.
+  rm -f a.out a.exe
+else
+  echo "libtool.m4: error: problem compiling CXX test program"
+fi
+
+$RM -f confest.$objext
+CFLAGS=$_lt_libdeps_save_CFLAGS
+
+# PORTME: override above test on systems where it is broken
+case $host_os in
+interix[3-9]*)
+  # Interix 3.5 installs completely hosed .la files for C++, so rather than
+  # hack all around it, let's just trust "g++" to DTRT.
+  predep_objects_CXX=
+  postdep_objects_CXX=
+  postdeps_CXX=
+  ;;
+esac
+
+
+case " $postdeps_CXX " in
+*" -lc "*) archive_cmds_need_lc_CXX=no ;;
+esac
+ compiler_lib_search_dirs_CXX=
+if test -n "${compiler_lib_search_path_CXX}"; then
+ compiler_lib_search_dirs_CXX=`echo " ${compiler_lib_search_path_CXX}" | $SED -e 's! -L! !g' -e 's!^ !!'`
+fi
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+    lt_prog_compiler_wl_CXX=
+lt_prog_compiler_pic_CXX=
+lt_prog_compiler_static_CXX=
+
+
+  # C++ specific cases for pic, static, wl, etc.
+  if test yes = "$GXX"; then
+    lt_prog_compiler_wl_CXX='-Wl,'
+    lt_prog_compiler_static_CXX='-static'
+
+    case $host_os in
+    aix*)
+      # All AIX code is PIC.
+      if test ia64 = "$host_cpu"; then
+	# AIX 5 now supports IA64 processor
+	lt_prog_compiler_static_CXX='-Bstatic'
+      fi
+      lt_prog_compiler_pic_CXX='-fPIC'
+      ;;
+
+    amigaos*)
+      case $host_cpu in
+      powerpc)
+            # see comment about AmigaOS4 .so support
+            lt_prog_compiler_pic_CXX='-fPIC'
+        ;;
+      m68k)
+            # FIXME: we need at least 68020 code to build shared libraries, but
+            # adding the '-m68020' flag to GCC prevents building anything better,
+            # like '-m68040'.
+            lt_prog_compiler_pic_CXX='-m68020 -resident32 -malways-restore-a4'
+        ;;
+      esac
+      ;;
+
+    beos* | irix5* | irix6* | nonstopux* | osf3* | osf4* | osf5*)
+      # PIC is the default for these OSes.
+      ;;
+    mingw* | cygwin* | os2* | pw32* | cegcc*)
+      # This hack is so that the source file can tell whether it is being
+      # built for inclusion in a dll (and should export symbols for example).
+      # Although the cygwin gcc ignores -fPIC, still need this for old-style
+      # (--disable-auto-import) libraries
+      lt_prog_compiler_pic_CXX='-DDLL_EXPORT'
+      case $host_os in
+      os2*)
+	lt_prog_compiler_static_CXX='$wl-static'
+	;;
+      esac
+      ;;
+    darwin* | rhapsody*)
+      # PIC is the default on this platform
+      # Common symbols not allowed in MH_DYLIB files
+      lt_prog_compiler_pic_CXX='-fno-common'
+      ;;
+    *djgpp*)
+      # DJGPP does not support shared libraries at all
+      lt_prog_compiler_pic_CXX=
+      ;;
+    haiku*)
+      # PIC is the default for Haiku.
+      # The "-static" flag exists, but is broken.
+      lt_prog_compiler_static_CXX=
+      ;;
+    interix[3-9]*)
+      # Interix 3.x gcc -fpic/-fPIC options generate broken code.
+      # Instead, we relocate shared libraries at runtime.
+      ;;
+    sysv4*MP*)
+      if test -d /usr/nec; then
+	lt_prog_compiler_pic_CXX=-Kconform_pic
+      fi
+      ;;
+    hpux*)
+      # PIC is the default for 64-bit PA HP-UX, but not for 32-bit
+      # PA HP-UX.  On IA64 HP-UX, PIC is the default but the pic flag
+      # sets the default TLS model and affects inlining.
+      case $host_cpu in
+      hppa*64*)
+	;;
+      *)
+	lt_prog_compiler_pic_CXX='-fPIC'
+	;;
+      esac
+      ;;
+    *qnx* | *nto*)
+      # QNX uses GNU C++, but need to define -shared option too, otherwise
+      # it will coredump.
+      lt_prog_compiler_pic_CXX='-fPIC -shared'
+      ;;
+    *)
+      lt_prog_compiler_pic_CXX='-fPIC'
+      ;;
+    esac
+  else
+    case $host_os in
+      aix[4-9]*)
+	# All AIX code is PIC.
+	if test ia64 = "$host_cpu"; then
+	  # AIX 5 now supports IA64 processor
+	  lt_prog_compiler_static_CXX='-Bstatic'
+	else
+	  lt_prog_compiler_static_CXX='-bnso -bI:/lib/syscalls.exp'
+	fi
+	;;
+      chorus*)
+	case $cc_basename in
+	cxch68*)
+	  # Green Hills C++ Compiler
+	  # _LT_TAGVAR(lt_prog_compiler_static, CXX)="--no_auto_instantiation -u __main -u __premain -u _abort -r $COOL_DIR/lib/libOrb.a $MVME_DIR/lib/CC/libC.a $MVME_DIR/lib/classix/libcx.s.a"
+	  ;;
+	esac
+	;;
+      mingw* | cygwin* | os2* | pw32* | cegcc*)
+	# This hack is so that the source file can tell whether it is being
+	# built for inclusion in a dll (and should export symbols for example).
+	lt_prog_compiler_pic_CXX='-DDLL_EXPORT'
+	;;
+      dgux*)
+	case $cc_basename in
+	  ec++*)
+	    lt_prog_compiler_pic_CXX='-KPIC'
+	    ;;
+	  ghcx*)
+	    # Green Hills C++ Compiler
+	    lt_prog_compiler_pic_CXX='-pic'
+	    ;;
+	  *)
+	    ;;
+	esac
+	;;
+      freebsd* | dragonfly*)
+	# FreeBSD uses GNU C++
+	;;
+      hpux9* | hpux10* | hpux11*)
+	case $cc_basename in
+	  CC*)
+	    lt_prog_compiler_wl_CXX='-Wl,'
+	    lt_prog_compiler_static_CXX='$wl-a ${wl}archive'
+	    if test ia64 != "$host_cpu"; then
+	      lt_prog_compiler_pic_CXX='+Z'
+	    fi
+	    ;;
+	  aCC*)
+	    lt_prog_compiler_wl_CXX='-Wl,'
+	    lt_prog_compiler_static_CXX='$wl-a ${wl}archive'
+	    case $host_cpu in
+	    hppa*64*|ia64*)
+	      # +Z the default
+	      ;;
+	    *)
+	      lt_prog_compiler_pic_CXX='+Z'
+	      ;;
+	    esac
+	    ;;
+	  *)
+	    ;;
+	esac
+	;;
+      interix*)
+	# This is c89, which is MS Visual C++ (no shared libs)
+	# Anyone wants to do a port?
+	;;
+      irix5* | irix6* | nonstopux*)
+	case $cc_basename in
+	  CC*)
+	    lt_prog_compiler_wl_CXX='-Wl,'
+	    lt_prog_compiler_static_CXX='-non_shared'
+	    # CC pic flag -KPIC is the default.
+	    ;;
+	  *)
+	    ;;
+	esac
+	;;
+      linux* | k*bsd*-gnu | kopensolaris*-gnu | gnu*)
+	case $cc_basename in
+	  KCC*)
+	    # KAI C++ Compiler
+	    lt_prog_compiler_wl_CXX='--backend -Wl,'
+	    lt_prog_compiler_pic_CXX='-fPIC'
+	    ;;
+	  ecpc* )
+	    # old Intel C++ for x86_64, which still supported -KPIC.
+	    lt_prog_compiler_wl_CXX='-Wl,'
+	    lt_prog_compiler_pic_CXX='-KPIC'
+	    lt_prog_compiler_static_CXX='-static'
+	    ;;
+	  icpc* )
+	    # Intel C++, used to be incompatible with GCC.
+	    # ICC 10 doesn't accept -KPIC any more.
+	    lt_prog_compiler_wl_CXX='-Wl,'
+	    lt_prog_compiler_pic_CXX='-fPIC'
+	    lt_prog_compiler_static_CXX='-static'
+	    ;;
+	  pgCC* | pgcpp*)
+	    # Portland Group C++ compiler
+	    lt_prog_compiler_wl_CXX='-Wl,'
+	    lt_prog_compiler_pic_CXX='-fpic'
+	    lt_prog_compiler_static_CXX='-Bstatic'
+	    ;;
+	  cxx*)
+	    # Compaq C++
+	    # Make sure the PIC flag is empty.  It appears that all Alpha
+	    # Linux and Compaq Tru64 Unix objects are PIC.
+	    lt_prog_compiler_pic_CXX=
+	    lt_prog_compiler_static_CXX='-non_shared'
+	    ;;
+	  xlc* | xlC* | bgxl[cC]* | mpixl[cC]*)
+	    # IBM XL 8.0, 9.0 on PPC and BlueGene
+	    lt_prog_compiler_wl_CXX='-Wl,'
+	    lt_prog_compiler_pic_CXX='-qpic'
+	    lt_prog_compiler_static_CXX='-qstaticlink'
+	    ;;
+	  *)
+	    case `$CC -V 2>&1 | sed 5q` in
+	    *Sun\ C*)
+	      # Sun C++ 5.9
+	      lt_prog_compiler_pic_CXX='-KPIC'
+	      lt_prog_compiler_static_CXX='-Bstatic'
+	      lt_prog_compiler_wl_CXX='-Qoption ld '
+	      ;;
+	    esac
+	    ;;
+	esac
+	;;
+      lynxos*)
+	;;
+      m88k*)
+	;;
+      mvs*)
+	case $cc_basename in
+	  cxx*)
+	    lt_prog_compiler_pic_CXX='-W c,exportall'
+	    ;;
+	  *)
+	    ;;
+	esac
+	;;
+      netbsd* | netbsdelf*-gnu)
+	;;
+      *qnx* | *nto*)
+        # QNX uses GNU C++, but need to define -shared option too, otherwise
+        # it will coredump.
+        lt_prog_compiler_pic_CXX='-fPIC -shared'
+        ;;
+      osf3* | osf4* | osf5*)
+	case $cc_basename in
+	  KCC*)
+	    lt_prog_compiler_wl_CXX='--backend -Wl,'
+	    ;;
+	  RCC*)
+	    # Rational C++ 2.4.1
+	    lt_prog_compiler_pic_CXX='-pic'
+	    ;;
+	  cxx*)
+	    # Digital/Compaq C++
+	    lt_prog_compiler_wl_CXX='-Wl,'
+	    # Make sure the PIC flag is empty.  It appears that all Alpha
+	    # Linux and Compaq Tru64 Unix objects are PIC.
+	    lt_prog_compiler_pic_CXX=
+	    lt_prog_compiler_static_CXX='-non_shared'
+	    ;;
+	  *)
+	    ;;
+	esac
+	;;
+      psos*)
+	;;
+      solaris*)
+	case $cc_basename in
+	  CC* | sunCC*)
+	    # Sun C++ 4.2, 5.x and Centerline C++
+	    lt_prog_compiler_pic_CXX='-KPIC'
+	    lt_prog_compiler_static_CXX='-Bstatic'
+	    lt_prog_compiler_wl_CXX='-Qoption ld '
+	    ;;
+	  gcx*)
+	    # Green Hills C++ Compiler
+	    lt_prog_compiler_pic_CXX='-PIC'
+	    ;;
+	  *)
+	    ;;
+	esac
+	;;
+      sunos4*)
+	case $cc_basename in
+	  CC*)
+	    # Sun C++ 4.x
+	    lt_prog_compiler_pic_CXX='-pic'
+	    lt_prog_compiler_static_CXX='-Bstatic'
+	    ;;
+	  lcc*)
+	    # Lucid
+	    lt_prog_compiler_pic_CXX='-pic'
+	    ;;
+	  *)
+	    ;;
+	esac
+	;;
+      sysv5* | unixware* | sco3.2v5* | sco5v6* | OpenUNIX*)
+	case $cc_basename in
+	  CC*)
+	    lt_prog_compiler_wl_CXX='-Wl,'
+	    lt_prog_compiler_pic_CXX='-KPIC'
+	    lt_prog_compiler_static_CXX='-Bstatic'
+	    ;;
+	esac
+	;;
+      tandem*)
+	case $cc_basename in
+	  NCC*)
+	    # NonStop-UX NCC 3.20
+	    lt_prog_compiler_pic_CXX='-KPIC'
+	    ;;
+	  *)
+	    ;;
+	esac
+	;;
+      vxworks*)
+	;;
+      *)
+	lt_prog_compiler_can_build_shared_CXX=no
+	;;
+    esac
+  fi
+
+case $host_os in
+  # For platforms that do not support PIC, -DPIC is meaningless:
+  *djgpp*)
+    lt_prog_compiler_pic_CXX=
+    ;;
+  *)
+    lt_prog_compiler_pic_CXX="$lt_prog_compiler_pic_CXX -DPIC"
+    ;;
+esac
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $compiler option to produce PIC" >&5
+$as_echo_n "checking for $compiler option to produce PIC... " >&6; }
+if ${lt_cv_prog_compiler_pic_CXX+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_prog_compiler_pic_CXX=$lt_prog_compiler_pic_CXX
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_pic_CXX" >&5
+$as_echo "$lt_cv_prog_compiler_pic_CXX" >&6; }
+lt_prog_compiler_pic_CXX=$lt_cv_prog_compiler_pic_CXX
+
+#
+# Check to make sure the PIC flag actually works.
+#
+if test -n "$lt_prog_compiler_pic_CXX"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $compiler PIC flag $lt_prog_compiler_pic_CXX works" >&5
+$as_echo_n "checking if $compiler PIC flag $lt_prog_compiler_pic_CXX works... " >&6; }
+if ${lt_cv_prog_compiler_pic_works_CXX+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_prog_compiler_pic_works_CXX=no
+   ac_outfile=conftest.$ac_objext
+   echo "$lt_simple_compile_test_code" > conftest.$ac_ext
+   lt_compiler_flag="$lt_prog_compiler_pic_CXX -DPIC"  ## exclude from sc_useless_quotes_in_assignment
+   # Insert the option either (1) after the last *FLAGS variable, or
+   # (2) before a word containing "conftest.", or (3) at the end.
+   # Note that $ac_compile itself does not contain backslashes and begins
+   # with a dollar sign (not a hyphen), so the echo should work correctly.
+   # The option is referenced via a variable to avoid confusing sed.
+   lt_compile=`echo "$ac_compile" | $SED \
+   -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
+   -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
+   -e 's:$: $lt_compiler_flag:'`
+   (eval echo "\"\$as_me:$LINENO: $lt_compile\"" >&5)
+   (eval "$lt_compile" 2>conftest.err)
+   ac_status=$?
+   cat conftest.err >&5
+   echo "$as_me:$LINENO: \$? = $ac_status" >&5
+   if (exit $ac_status) && test -s "$ac_outfile"; then
+     # The compiler can only warn and ignore the option if not recognized
+     # So say no if there are warnings other than the usual output.
+     $ECHO "$_lt_compiler_boilerplate" | $SED '/^$/d' >conftest.exp
+     $SED '/^$/d; /^ *+/d' conftest.err >conftest.er2
+     if test ! -s conftest.er2 || diff conftest.exp conftest.er2 >/dev/null; then
+       lt_cv_prog_compiler_pic_works_CXX=yes
+     fi
+   fi
+   $RM conftest*
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_pic_works_CXX" >&5
+$as_echo "$lt_cv_prog_compiler_pic_works_CXX" >&6; }
+
+if test yes = "$lt_cv_prog_compiler_pic_works_CXX"; then
+    case $lt_prog_compiler_pic_CXX in
+     "" | " "*) ;;
+     *) lt_prog_compiler_pic_CXX=" $lt_prog_compiler_pic_CXX" ;;
+     esac
+else
+    lt_prog_compiler_pic_CXX=
+     lt_prog_compiler_can_build_shared_CXX=no
+fi
+
+fi
+
+
+
+
+
+#
+# Check to make sure the static flag actually works.
+#
+wl=$lt_prog_compiler_wl_CXX eval lt_tmp_static_flag=\"$lt_prog_compiler_static_CXX\"
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if $compiler static flag $lt_tmp_static_flag works" >&5
+$as_echo_n "checking if $compiler static flag $lt_tmp_static_flag works... " >&6; }
+if ${lt_cv_prog_compiler_static_works_CXX+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_prog_compiler_static_works_CXX=no
+   save_LDFLAGS=$LDFLAGS
+   LDFLAGS="$LDFLAGS $lt_tmp_static_flag"
+   echo "$lt_simple_link_test_code" > conftest.$ac_ext
+   if (eval $ac_link 2>conftest.err) && test -s conftest$ac_exeext; then
+     # The linker can only warn and ignore the option if not recognized
+     # So say no if there are warnings
+     if test -s conftest.err; then
+       # Append any errors to the config.log.
+       cat conftest.err 1>&5
+       $ECHO "$_lt_linker_boilerplate" | $SED '/^$/d' > conftest.exp
+       $SED '/^$/d; /^ *+/d' conftest.err >conftest.er2
+       if diff conftest.exp conftest.er2 >/dev/null; then
+         lt_cv_prog_compiler_static_works_CXX=yes
+       fi
+     else
+       lt_cv_prog_compiler_static_works_CXX=yes
+     fi
+   fi
+   $RM -r conftest*
+   LDFLAGS=$save_LDFLAGS
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_static_works_CXX" >&5
+$as_echo "$lt_cv_prog_compiler_static_works_CXX" >&6; }
+
+if test yes = "$lt_cv_prog_compiler_static_works_CXX"; then
+    :
+else
+    lt_prog_compiler_static_CXX=
+fi
+
+
+
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $compiler supports -c -o file.$ac_objext" >&5
+$as_echo_n "checking if $compiler supports -c -o file.$ac_objext... " >&6; }
+if ${lt_cv_prog_compiler_c_o_CXX+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_prog_compiler_c_o_CXX=no
+   $RM -r conftest 2>/dev/null
+   mkdir conftest
+   cd conftest
+   mkdir out
+   echo "$lt_simple_compile_test_code" > conftest.$ac_ext
+
+   lt_compiler_flag="-o out/conftest2.$ac_objext"
+   # Insert the option either (1) after the last *FLAGS variable, or
+   # (2) before a word containing "conftest.", or (3) at the end.
+   # Note that $ac_compile itself does not contain backslashes and begins
+   # with a dollar sign (not a hyphen), so the echo should work correctly.
+   lt_compile=`echo "$ac_compile" | $SED \
+   -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
+   -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
+   -e 's:$: $lt_compiler_flag:'`
+   (eval echo "\"\$as_me:$LINENO: $lt_compile\"" >&5)
+   (eval "$lt_compile" 2>out/conftest.err)
+   ac_status=$?
+   cat out/conftest.err >&5
+   echo "$as_me:$LINENO: \$? = $ac_status" >&5
+   if (exit $ac_status) && test -s out/conftest2.$ac_objext
+   then
+     # The compiler can only warn and ignore the option if not recognized
+     # So say no if there are warnings
+     $ECHO "$_lt_compiler_boilerplate" | $SED '/^$/d' > out/conftest.exp
+     $SED '/^$/d; /^ *+/d' out/conftest.err >out/conftest.er2
+     if test ! -s out/conftest.er2 || diff out/conftest.exp out/conftest.er2 >/dev/null; then
+       lt_cv_prog_compiler_c_o_CXX=yes
+     fi
+   fi
+   chmod u+w . 2>&5
+   $RM conftest*
+   # SGI C++ compiler will create directory out/ii_files/ for
+   # template instantiation
+   test -d out/ii_files && $RM out/ii_files/* && rmdir out/ii_files
+   $RM out/* && rmdir out
+   cd ..
+   $RM -r conftest
+   $RM conftest*
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_c_o_CXX" >&5
+$as_echo "$lt_cv_prog_compiler_c_o_CXX" >&6; }
+
+
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $compiler supports -c -o file.$ac_objext" >&5
+$as_echo_n "checking if $compiler supports -c -o file.$ac_objext... " >&6; }
+if ${lt_cv_prog_compiler_c_o_CXX+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_prog_compiler_c_o_CXX=no
+   $RM -r conftest 2>/dev/null
+   mkdir conftest
+   cd conftest
+   mkdir out
+   echo "$lt_simple_compile_test_code" > conftest.$ac_ext
+
+   lt_compiler_flag="-o out/conftest2.$ac_objext"
+   # Insert the option either (1) after the last *FLAGS variable, or
+   # (2) before a word containing "conftest.", or (3) at the end.
+   # Note that $ac_compile itself does not contain backslashes and begins
+   # with a dollar sign (not a hyphen), so the echo should work correctly.
+   lt_compile=`echo "$ac_compile" | $SED \
+   -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
+   -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
+   -e 's:$: $lt_compiler_flag:'`
+   (eval echo "\"\$as_me:$LINENO: $lt_compile\"" >&5)
+   (eval "$lt_compile" 2>out/conftest.err)
+   ac_status=$?
+   cat out/conftest.err >&5
+   echo "$as_me:$LINENO: \$? = $ac_status" >&5
+   if (exit $ac_status) && test -s out/conftest2.$ac_objext
+   then
+     # The compiler can only warn and ignore the option if not recognized
+     # So say no if there are warnings
+     $ECHO "$_lt_compiler_boilerplate" | $SED '/^$/d' > out/conftest.exp
+     $SED '/^$/d; /^ *+/d' out/conftest.err >out/conftest.er2
+     if test ! -s out/conftest.er2 || diff out/conftest.exp out/conftest.er2 >/dev/null; then
+       lt_cv_prog_compiler_c_o_CXX=yes
+     fi
+   fi
+   chmod u+w . 2>&5
+   $RM conftest*
+   # SGI C++ compiler will create directory out/ii_files/ for
+   # template instantiation
+   test -d out/ii_files && $RM out/ii_files/* && rmdir out/ii_files
+   $RM out/* && rmdir out
+   cd ..
+   $RM -r conftest
+   $RM conftest*
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_c_o_CXX" >&5
+$as_echo "$lt_cv_prog_compiler_c_o_CXX" >&6; }
+
+
+
+
+hard_links=nottested
+if test no = "$lt_cv_prog_compiler_c_o_CXX" && test no != "$need_locks"; then
+  # do not overwrite the value of need_locks provided by the user
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if we can lock with hard links" >&5
+$as_echo_n "checking if we can lock with hard links... " >&6; }
+  hard_links=yes
+  $RM conftest*
+  ln conftest.a conftest.b 2>/dev/null && hard_links=no
+  touch conftest.a
+  ln conftest.a conftest.b 2>&5 || hard_links=no
+  ln conftest.a conftest.b 2>/dev/null && hard_links=no
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $hard_links" >&5
+$as_echo "$hard_links" >&6; }
+  if test no = "$hard_links"; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: '$CC' does not support '-c -o', so 'make -j' may be unsafe" >&5
+$as_echo "$as_me: WARNING: '$CC' does not support '-c -o', so 'make -j' may be unsafe" >&2;}
+    need_locks=warn
+  fi
+else
+  need_locks=no
+fi
+
+
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the $compiler linker ($LD) supports shared libraries" >&5
+$as_echo_n "checking whether the $compiler linker ($LD) supports shared libraries... " >&6; }
+
+  export_symbols_cmds_CXX='$NM $libobjs $convenience | $global_symbol_pipe | $SED '\''s/.* //'\'' | sort | uniq > $export_symbols'
+  exclude_expsyms_CXX='_GLOBAL_OFFSET_TABLE_|_GLOBAL__F[ID]_.*'
+  case $host_os in
+  aix[4-9]*)
+    # If we're using GNU nm, then we don't want the "-C" option.
+    # -C means demangle to GNU nm, but means don't demangle to AIX nm.
+    # Without the "-l" option, or with the "-B" option, AIX nm treats
+    # weak defined symbols like other global defined symbols, whereas
+    # GNU nm marks them as "W".
+    # While the 'weak' keyword is ignored in the Export File, we need
+    # it in the Import File for the 'aix-soname' feature, so we have
+    # to replace the "-B" option with "-P" for AIX nm.
+    if $NM -V 2>&1 | $GREP 'GNU' > /dev/null; then
+      export_symbols_cmds_CXX='$NM -Bpg $libobjs $convenience | awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B") || (\$ 2 == "W")) && (substr(\$ 3,1,1) != ".")) { if (\$ 2 == "W") { print \$ 3 " weak" } else { print \$ 3 } } }'\'' | sort -u > $export_symbols'
+    else
+      export_symbols_cmds_CXX='`func_echo_all $NM | $SED -e '\''s/B\([^B]*\)$/P\1/'\''` -PCpgl $libobjs $convenience | awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B") || (\$ 2 == "W") || (\$ 2 == "V") || (\$ 2 == "Z")) && (substr(\$ 1,1,1) != ".")) { if ((\$ 2 == "W") || (\$ 2 == "V") || (\$ 2 == "Z")) { print \$ 1 " weak" } else { print \$ 1 } } }'\'' | sort -u > $export_symbols'
+    fi
+    ;;
+  pw32*)
+    export_symbols_cmds_CXX=$ltdll_cmds
+    ;;
+  cygwin* | mingw* | cegcc*)
+    case $cc_basename in
+    cl*)
+      exclude_expsyms_CXX='_NULL_IMPORT_DESCRIPTOR|_IMPORT_DESCRIPTOR_.*'
+      ;;
+    *)
+      export_symbols_cmds_CXX='$NM $libobjs $convenience | $global_symbol_pipe | $SED -e '\''/^[BCDGRS][ ]/s/.*[ ]\([^ ]*\)/\1 DATA/;s/^.*[ ]__nm__\([^ ]*\)[ ][^ ]*/\1 DATA/;/^I[ ]/d;/^[AITW][ ]/s/.* //'\'' | sort | uniq > $export_symbols'
+      exclude_expsyms_CXX='[_]+GLOBAL_OFFSET_TABLE_|[_]+GLOBAL__[FID]_.*|[_]+head_[A-Za-z0-9_]+_dll|[A-Za-z0-9_]+_dll_iname'
+      ;;
+    esac
+    ;;
+  linux* | k*bsd*-gnu | gnu*)
+    link_all_deplibs_CXX=no
+    ;;
+  *)
+    export_symbols_cmds_CXX='$NM $libobjs $convenience | $global_symbol_pipe | $SED '\''s/.* //'\'' | sort | uniq > $export_symbols'
+    ;;
+  esac
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ld_shlibs_CXX" >&5
+$as_echo "$ld_shlibs_CXX" >&6; }
+test no = "$ld_shlibs_CXX" && can_build_shared=no
+
+with_gnu_ld_CXX=$with_gnu_ld
+
+
+
+
+
+
+#
+# Do we need to explicitly link libc?
+#
+case "x$archive_cmds_need_lc_CXX" in
+x|xyes)
+  # Assume -lc should be added
+  archive_cmds_need_lc_CXX=yes
+
+  if test yes,yes = "$GCC,$enable_shared"; then
+    case $archive_cmds_CXX in
+    *'~'*)
+      # FIXME: we may have to deal with multi-command sequences.
+      ;;
+    '$CC '*)
+      # Test whether the compiler implicitly links with -lc since on some
+      # systems, -lgcc has to come before -lc. If gcc already passes -lc
+      # to ld, don't add -lc before -lgcc.
+      { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether -lc should be explicitly linked in" >&5
+$as_echo_n "checking whether -lc should be explicitly linked in... " >&6; }
+if ${lt_cv_archive_cmds_need_lc_CXX+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  $RM conftest*
+	echo "$lt_simple_compile_test_code" > conftest.$ac_ext
+
+	if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } 2>conftest.err; then
+	  soname=conftest
+	  lib=conftest
+	  libobjs=conftest.$ac_objext
+	  deplibs=
+	  wl=$lt_prog_compiler_wl_CXX
+	  pic_flag=$lt_prog_compiler_pic_CXX
+	  compiler_flags=-v
+	  linker_flags=-v
+	  verstring=
+	  output_objdir=.
+	  libname=conftest
+	  lt_save_allow_undefined_flag=$allow_undefined_flag_CXX
+	  allow_undefined_flag_CXX=
+	  if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$archive_cmds_CXX 2\>\&1 \| $GREP \" -lc \" \>/dev/null 2\>\&1\""; } >&5
+  (eval $archive_cmds_CXX 2\>\&1 \| $GREP \" -lc \" \>/dev/null 2\>\&1) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+	  then
+	    lt_cv_archive_cmds_need_lc_CXX=no
+	  else
+	    lt_cv_archive_cmds_need_lc_CXX=yes
+	  fi
+	  allow_undefined_flag_CXX=$lt_save_allow_undefined_flag
+	else
+	  cat conftest.err 1>&5
+	fi
+	$RM conftest*
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_archive_cmds_need_lc_CXX" >&5
+$as_echo "$lt_cv_archive_cmds_need_lc_CXX" >&6; }
+      archive_cmds_need_lc_CXX=$lt_cv_archive_cmds_need_lc_CXX
+      ;;
+    esac
+  fi
+  ;;
+esac
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking dynamic linker characteristics" >&5
+$as_echo_n "checking dynamic linker characteristics... " >&6; }
+
+library_names_spec=
+libname_spec='lib$name'
+soname_spec=
+shrext_cmds=.so
+postinstall_cmds=
+postuninstall_cmds=
+finish_cmds=
+finish_eval=
+shlibpath_var=
+shlibpath_overrides_runpath=unknown
+version_type=none
+dynamic_linker="$host_os ld.so"
+sys_lib_dlsearch_path_spec="/lib /usr/lib"
+need_lib_prefix=unknown
+hardcode_into_libs=no
+
+# when you set need_version to no, make sure it does not cause -set_version
+# flags to be left without arguments
+need_version=unknown
+
+
+
+case $host_os in
+aix3*)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  library_names_spec='$libname$release$shared_ext$versuffix $libname.a'
+  shlibpath_var=LIBPATH
+
+  # AIX 3 has no versioning support, so we append a major version to the name.
+  soname_spec='$libname$release$shared_ext$major'
+  ;;
+
+aix[4-9]*)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  need_lib_prefix=no
+  need_version=no
+  hardcode_into_libs=yes
+  if test ia64 = "$host_cpu"; then
+    # AIX 5 supports IA64
+    library_names_spec='$libname$release$shared_ext$major $libname$release$shared_ext$versuffix $libname$shared_ext'
+    shlibpath_var=LD_LIBRARY_PATH
+  else
+    # With GCC up to 2.95.x, collect2 would create an import file
+    # for dependence libraries.  The import file would start with
+    # the line '#! .'.  This would cause the generated library to
+    # depend on '.', always an invalid library.  This was fixed in
+    # development snapshots of GCC prior to 3.0.
+    case $host_os in
+      aix4 | aix4.[01] | aix4.[01].*)
+      if { echo '#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 97)'
+	   echo ' yes '
+	   echo '#endif'; } | $CC -E - | $GREP yes > /dev/null; then
+	:
+      else
+	can_build_shared=no
+      fi
+      ;;
+    esac
+    # Using Import Files as archive members, it is possible to support
+    # filename-based versioning of shared library archives on AIX. While
+    # this would work for both with and without runtime linking, it will
+    # prevent static linking of such archives. So we do filename-based
+    # shared library versioning with .so extension only, which is used
+    # when both runtime linking and shared linking is enabled.
+    # Unfortunately, runtime linking may impact performance, so we do
+    # not want this to be the default eventually. Also, we use the
+    # versioned .so libs for executables only if there is the -brtl
+    # linker flag in LDFLAGS as well, or --with-aix-soname=svr4 only.
+    # To allow for filename-based versioning support, we need to create
+    # libNAME.so.V as an archive file, containing:
+    # *) an Import File, referring to the versioned filename of the
+    #    archive as well as the shared archive member, telling the
+    #    bitwidth (32 or 64) of that shared object, and providing the
+    #    list of exported symbols of that shared object, eventually
+    #    decorated with the 'weak' keyword
+    # *) the shared object with the F_LOADONLY flag set, to really avoid
+    #    it being seen by the linker.
+    # At run time we better use the real file rather than another symlink,
+    # but for link time we create the symlink libNAME.so -> libNAME.so.V
+
+    case $with_aix_soname,$aix_use_runtimelinking in
+    # AIX (on Power*) has no versioning support, so currently we cannot hardcode correct
+    # soname into executable. Probably we can add versioning support to
+    # collect2, so additional links can be useful in future.
+    aix,yes) # traditional libtool
+      dynamic_linker='AIX unversionable lib.so'
+      # If using run time linking (on AIX 4.2 or later) use lib<name>.so
+      # instead of lib<name>.a to let people know that these are not
+      # typical AIX shared libraries.
+      library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+      ;;
+    aix,no) # traditional AIX only
+      dynamic_linker='AIX lib.a(lib.so.V)'
+      # We preserve .a as extension for shared libraries through AIX4.2
+      # and later when we are not doing run time linking.
+      library_names_spec='$libname$release.a $libname.a'
+      soname_spec='$libname$release$shared_ext$major'
+      ;;
+    svr4,*) # full svr4 only
+      dynamic_linker="AIX lib.so.V($shared_archive_member_spec.o)"
+      library_names_spec='$libname$release$shared_ext$major $libname$shared_ext'
+      # We do not specify a path in Import Files, so LIBPATH fires.
+      shlibpath_overrides_runpath=yes
+      ;;
+    *,yes) # both, prefer svr4
+      dynamic_linker="AIX lib.so.V($shared_archive_member_spec.o), lib.a(lib.so.V)"
+      library_names_spec='$libname$release$shared_ext$major $libname$shared_ext'
+      # unpreferred sharedlib libNAME.a needs extra handling
+      postinstall_cmds='test -n "$linkname" || linkname="$realname"~func_stripname "" ".so" "$linkname"~$install_shared_prog "$dir/$func_stripname_result.$libext" "$destdir/$func_stripname_result.$libext"~test -z "$tstripme" || test -z "$striplib" || $striplib "$destdir/$func_stripname_result.$libext"'
+      postuninstall_cmds='for n in $library_names $old_library; do :; done~func_stripname "" ".so" "$n"~test "$func_stripname_result" = "$n" || func_append rmfiles " $odir/$func_stripname_result.$libext"'
+      # We do not specify a path in Import Files, so LIBPATH fires.
+      shlibpath_overrides_runpath=yes
+      ;;
+    *,no) # both, prefer aix
+      dynamic_linker="AIX lib.a(lib.so.V), lib.so.V($shared_archive_member_spec.o)"
+      library_names_spec='$libname$release.a $libname.a'
+      soname_spec='$libname$release$shared_ext$major'
+      # unpreferred sharedlib libNAME.so.V and symlink libNAME.so need extra handling
+      postinstall_cmds='test -z "$dlname" || $install_shared_prog $dir/$dlname $destdir/$dlname~test -z "$tstripme" || test -z "$striplib" || $striplib $destdir/$dlname~test -n "$linkname" || linkname=$realname~func_stripname "" ".a" "$linkname"~(cd "$destdir" && $LN_S -f $dlname $func_stripname_result.so)'
+      postuninstall_cmds='test -z "$dlname" || func_append rmfiles " $odir/$dlname"~for n in $old_library $library_names; do :; done~func_stripname "" ".a" "$n"~func_append rmfiles " $odir/$func_stripname_result.so"'
+      ;;
+    esac
+    shlibpath_var=LIBPATH
+  fi
+  ;;
+
+amigaos*)
+  case $host_cpu in
+  powerpc)
+    # Since July 2007 AmigaOS4 officially supports .so libraries.
+    # When compiling the executable, add -use-dynld -Lsobjs: to the compileline.
+    library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+    ;;
+  m68k)
+    library_names_spec='$libname.ixlibrary $libname.a'
+    # Create ${libname}_ixlibrary.a entries in /sys/libs.
+    finish_eval='for lib in `ls $libdir/*.ixlibrary 2>/dev/null`; do libname=`func_echo_all "$lib" | $SED '\''s%^.*/\([^/]*\)\.ixlibrary$%\1%'\''`; $RM /sys/libs/${libname}_ixlibrary.a; $show "cd /sys/libs && $LN_S $lib ${libname}_ixlibrary.a"; cd /sys/libs && $LN_S $lib ${libname}_ixlibrary.a || exit 1; done'
+    ;;
+  esac
+  ;;
+
+beos*)
+  library_names_spec='$libname$shared_ext'
+  dynamic_linker="$host_os ld.so"
+  shlibpath_var=LIBRARY_PATH
+  ;;
+
+bsdi[45]*)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  need_version=no
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  soname_spec='$libname$release$shared_ext$major'
+  finish_cmds='PATH="\$PATH:/sbin" ldconfig $libdir'
+  shlibpath_var=LD_LIBRARY_PATH
+  sys_lib_search_path_spec="/shlib /usr/lib /usr/X11/lib /usr/contrib/lib /lib /usr/local/lib"
+  sys_lib_dlsearch_path_spec="/shlib /usr/lib /usr/local/lib"
+  # the default ld.so.conf also contains /usr/contrib/lib and
+  # /usr/X11R6/lib (/usr/X11 is a link to /usr/X11R6), but let us allow
+  # libtool to hard-code these into programs
+  ;;
+
+cygwin* | mingw* | pw32* | cegcc*)
+  version_type=windows
+  shrext_cmds=.dll
+  need_version=no
+  need_lib_prefix=no
+
+  case $GCC,$cc_basename in
+  yes,*)
+    # gcc
+    library_names_spec='$libname.dll.a'
+    # DLL is installed to $(libdir)/../bin by postinstall_cmds
+    postinstall_cmds='base_file=`basename \$file`~
+      dlpath=`$SHELL 2>&1 -c '\''. $dir/'\''\$base_file'\''i; echo \$dlname'\''`~
+      dldir=$destdir/`dirname \$dlpath`~
+      test -d \$dldir || mkdir -p \$dldir~
+      $install_prog $dir/$dlname \$dldir/$dlname~
+      chmod a+x \$dldir/$dlname~
+      if test -n '\''$stripme'\'' && test -n '\''$striplib'\''; then
+        eval '\''$striplib \$dldir/$dlname'\'' || exit \$?;
+      fi'
+    postuninstall_cmds='dldll=`$SHELL 2>&1 -c '\''. $file; echo \$dlname'\''`~
+      dlpath=$dir/\$dldll~
+       $RM \$dlpath'
+    shlibpath_overrides_runpath=yes
+
+    case $host_os in
+    cygwin*)
+      # Cygwin DLLs use 'cyg' prefix rather than 'lib'
+      soname_spec='`echo $libname | sed -e 's/^lib/cyg/'``echo $release | $SED -e 's/[.]/-/g'`$versuffix$shared_ext'
+
+      ;;
+    mingw* | cegcc*)
+      # MinGW DLLs use traditional 'lib' prefix
+      soname_spec='$libname`echo $release | $SED -e 's/[.]/-/g'`$versuffix$shared_ext'
+      ;;
+    pw32*)
+      # pw32 DLLs use 'pw' prefix rather than 'lib'
+      library_names_spec='`echo $libname | sed -e 's/^lib/pw/'``echo $release | $SED -e 's/[.]/-/g'`$versuffix$shared_ext'
+      ;;
+    esac
+    dynamic_linker='Win32 ld.exe'
+    ;;
+
+  *,cl*)
+    # Native MSVC
+    libname_spec='$name'
+    soname_spec='$libname`echo $release | $SED -e 's/[.]/-/g'`$versuffix$shared_ext'
+    library_names_spec='$libname.dll.lib'
+
+    case $build_os in
+    mingw*)
+      sys_lib_search_path_spec=
+      lt_save_ifs=$IFS
+      IFS=';'
+      for lt_path in $LIB
+      do
+        IFS=$lt_save_ifs
+        # Let DOS variable expansion print the short 8.3 style file name.
+        lt_path=`cd "$lt_path" 2>/dev/null && cmd //C "for %i in (".") do @echo %~si"`
+        sys_lib_search_path_spec="$sys_lib_search_path_spec $lt_path"
+      done
+      IFS=$lt_save_ifs
+      # Convert to MSYS style.
+      sys_lib_search_path_spec=`$ECHO "$sys_lib_search_path_spec" | sed -e 's|\\\\|/|g' -e 's| \\([a-zA-Z]\\):| /\\1|g' -e 's|^ ||'`
+      ;;
+    cygwin*)
+      # Convert to unix form, then to dos form, then back to unix form
+      # but this time dos style (no spaces!) so that the unix form looks
+      # like /cygdrive/c/PROGRA~1:/cygdr...
+      sys_lib_search_path_spec=`cygpath --path --unix "$LIB"`
+      sys_lib_search_path_spec=`cygpath --path --dos "$sys_lib_search_path_spec" 2>/dev/null`
+      sys_lib_search_path_spec=`cygpath --path --unix "$sys_lib_search_path_spec" | $SED -e "s/$PATH_SEPARATOR/ /g"`
+      ;;
+    *)
+      sys_lib_search_path_spec=$LIB
+      if $ECHO "$sys_lib_search_path_spec" | $GREP ';[c-zC-Z]:/' >/dev/null; then
+        # It is most probably a Windows format PATH.
+        sys_lib_search_path_spec=`$ECHO "$sys_lib_search_path_spec" | $SED -e 's/;/ /g'`
+      else
+        sys_lib_search_path_spec=`$ECHO "$sys_lib_search_path_spec" | $SED -e "s/$PATH_SEPARATOR/ /g"`
+      fi
+      # FIXME: find the short name or the path components, as spaces are
+      # common. (e.g. "Program Files" -> "PROGRA~1")
+      ;;
+    esac
+
+    # DLL is installed to $(libdir)/../bin by postinstall_cmds
+    postinstall_cmds='base_file=`basename \$file`~
+      dlpath=`$SHELL 2>&1 -c '\''. $dir/'\''\$base_file'\''i; echo \$dlname'\''`~
+      dldir=$destdir/`dirname \$dlpath`~
+      test -d \$dldir || mkdir -p \$dldir~
+      $install_prog $dir/$dlname \$dldir/$dlname'
+    postuninstall_cmds='dldll=`$SHELL 2>&1 -c '\''. $file; echo \$dlname'\''`~
+      dlpath=$dir/\$dldll~
+       $RM \$dlpath'
+    shlibpath_overrides_runpath=yes
+    dynamic_linker='Win32 link.exe'
+    ;;
+
+  *)
+    # Assume MSVC wrapper
+    library_names_spec='$libname`echo $release | $SED -e 's/[.]/-/g'`$versuffix$shared_ext $libname.lib'
+    dynamic_linker='Win32 ld.exe'
+    ;;
+  esac
+  # FIXME: first we should search . and the directory the executable is in
+  shlibpath_var=PATH
+  ;;
+
+darwin* | rhapsody*)
+  dynamic_linker="$host_os dyld"
+  version_type=darwin
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='$libname$release$major$shared_ext $libname$shared_ext'
+  soname_spec='$libname$release$major$shared_ext'
+  shlibpath_overrides_runpath=yes
+  shlibpath_var=DYLD_LIBRARY_PATH
+  shrext_cmds='`test .$module = .yes && echo .so || echo .dylib`'
+
+  sys_lib_dlsearch_path_spec='/usr/local/lib /lib /usr/lib'
+  ;;
+
+dgux*)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  soname_spec='$libname$release$shared_ext$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  ;;
+
+freebsd* | dragonfly*)
+  # DragonFly does not have aout.  When/if they implement a new
+  # versioning mechanism, adjust this.
+  if test -x /usr/bin/objformat; then
+    objformat=`/usr/bin/objformat`
+  else
+    case $host_os in
+    freebsd[23].*) objformat=aout ;;
+    *) objformat=elf ;;
+    esac
+  fi
+  version_type=freebsd-$objformat
+  case $version_type in
+    freebsd-elf*)
+      library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+      soname_spec='$libname$release$shared_ext$major'
+      need_version=no
+      need_lib_prefix=no
+      ;;
+    freebsd-*)
+      library_names_spec='$libname$release$shared_ext$versuffix $libname$shared_ext$versuffix'
+      need_version=yes
+      ;;
+  esac
+  shlibpath_var=LD_LIBRARY_PATH
+  case $host_os in
+  freebsd2.*)
+    shlibpath_overrides_runpath=yes
+    ;;
+  freebsd3.[01]* | freebsdelf3.[01]*)
+    shlibpath_overrides_runpath=yes
+    hardcode_into_libs=yes
+    ;;
+  freebsd3.[2-9]* | freebsdelf3.[2-9]* | \
+  freebsd4.[0-5] | freebsdelf4.[0-5] | freebsd4.1.1 | freebsdelf4.1.1)
+    shlibpath_overrides_runpath=no
+    hardcode_into_libs=yes
+    ;;
+  *) # from 4.6 on, and DragonFly
+    shlibpath_overrides_runpath=yes
+    hardcode_into_libs=yes
+    ;;
+  esac
+  ;;
+
+haiku*)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  need_lib_prefix=no
+  need_version=no
+  dynamic_linker="$host_os runtime_loader"
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  soname_spec='$libname$release$shared_ext$major'
+  shlibpath_var=LIBRARY_PATH
+  shlibpath_overrides_runpath=no
+  sys_lib_dlsearch_path_spec='/boot/home/config/lib /boot/common/lib /boot/system/lib'
+  hardcode_into_libs=yes
+  ;;
+
+hpux9* | hpux10* | hpux11*)
+  # Give a soname corresponding to the major version so that dld.sl refuses to
+  # link against other versions.
+  version_type=sunos
+  need_lib_prefix=no
+  need_version=no
+  case $host_cpu in
+  ia64*)
+    shrext_cmds='.so'
+    hardcode_into_libs=yes
+    dynamic_linker="$host_os dld.so"
+    shlibpath_var=LD_LIBRARY_PATH
+    shlibpath_overrides_runpath=yes # Unless +noenvvar is specified.
+    library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+    soname_spec='$libname$release$shared_ext$major'
+    if test 32 = "$HPUX_IA64_MODE"; then
+      sys_lib_search_path_spec="/usr/lib/hpux32 /usr/local/lib/hpux32 /usr/local/lib"
+      sys_lib_dlsearch_path_spec=/usr/lib/hpux32
+    else
+      sys_lib_search_path_spec="/usr/lib/hpux64 /usr/local/lib/hpux64"
+      sys_lib_dlsearch_path_spec=/usr/lib/hpux64
+    fi
+    ;;
+  hppa*64*)
+    shrext_cmds='.sl'
+    hardcode_into_libs=yes
+    dynamic_linker="$host_os dld.sl"
+    shlibpath_var=LD_LIBRARY_PATH # How should we handle SHLIB_PATH
+    shlibpath_overrides_runpath=yes # Unless +noenvvar is specified.
+    library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+    soname_spec='$libname$release$shared_ext$major'
+    sys_lib_search_path_spec="/usr/lib/pa20_64 /usr/ccs/lib/pa20_64"
+    sys_lib_dlsearch_path_spec=$sys_lib_search_path_spec
+    ;;
+  *)
+    shrext_cmds='.sl'
+    dynamic_linker="$host_os dld.sl"
+    shlibpath_var=SHLIB_PATH
+    shlibpath_overrides_runpath=no # +s is required to enable SHLIB_PATH
+    library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+    soname_spec='$libname$release$shared_ext$major'
+    ;;
+  esac
+  # HP-UX runs *really* slowly unless shared libraries are mode 555, ...
+  postinstall_cmds='chmod 555 $lib'
+  # or fails outright, so override atomically:
+  install_override_mode=555
+  ;;
+
+interix[3-9]*)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  soname_spec='$libname$release$shared_ext$major'
+  dynamic_linker='Interix 3.x ld.so.1 (PE, like ELF)'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=no
+  hardcode_into_libs=yes
+  ;;
+
+irix5* | irix6* | nonstopux*)
+  case $host_os in
+    nonstopux*) version_type=nonstopux ;;
+    *)
+	if test yes = "$lt_cv_prog_gnu_ld"; then
+		version_type=linux # correct to gnu/linux during the next big refactor
+	else
+		version_type=irix
+	fi ;;
+  esac
+  need_lib_prefix=no
+  need_version=no
+  soname_spec='$libname$release$shared_ext$major'
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$release$shared_ext $libname$shared_ext'
+  case $host_os in
+  irix5* | nonstopux*)
+    libsuff= shlibsuff=
+    ;;
+  *)
+    case $LD in # libtool.m4 will add one of these switches to LD
+    *-32|*"-32 "|*-melf32bsmip|*"-melf32bsmip ")
+      libsuff= shlibsuff= libmagic=32-bit;;
+    *-n32|*"-n32 "|*-melf32bmipn32|*"-melf32bmipn32 ")
+      libsuff=32 shlibsuff=N32 libmagic=N32;;
+    *-64|*"-64 "|*-melf64bmip|*"-melf64bmip ")
+      libsuff=64 shlibsuff=64 libmagic=64-bit;;
+    *) libsuff= shlibsuff= libmagic=never-match;;
+    esac
+    ;;
+  esac
+  shlibpath_var=LD_LIBRARY${shlibsuff}_PATH
+  shlibpath_overrides_runpath=no
+  sys_lib_search_path_spec="/usr/lib$libsuff /lib$libsuff /usr/local/lib$libsuff"
+  sys_lib_dlsearch_path_spec="/usr/lib$libsuff /lib$libsuff"
+  hardcode_into_libs=yes
+  ;;
+
+# No shared lib support for Linux oldld, aout, or coff.
+linux*oldld* | linux*aout* | linux*coff*)
+  dynamic_linker=no
+  ;;
+
+linux*android*)
+  version_type=none # Android doesn't support versioned libraries.
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='$libname$release$shared_ext'
+  soname_spec='$libname$release$shared_ext'
+  finish_cmds=
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+
+  # This implies no fast_install, which is unacceptable.
+  # Some rework will be needed to allow for fast_install
+  # before this can be enabled.
+  hardcode_into_libs=yes
+
+  dynamic_linker='Android linker'
+  # Don't embed -rpath directories since the linker doesn't support them.
+  hardcode_libdir_flag_spec_CXX='-L$libdir'
+  ;;
+
+# This must be glibc/ELF.
+linux* | k*bsd*-gnu | kopensolaris*-gnu | gnu*)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  soname_spec='$libname$release$shared_ext$major'
+  finish_cmds='PATH="\$PATH:/sbin" ldconfig -n $libdir'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=no
+
+  # Some binutils ld are patched to set DT_RUNPATH
+  if ${lt_cv_shlibpath_overrides_runpath+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_shlibpath_overrides_runpath=no
+    save_LDFLAGS=$LDFLAGS
+    save_libdir=$libdir
+    eval "libdir=/foo; wl=\"$lt_prog_compiler_wl_CXX\"; \
+	 LDFLAGS=\"\$LDFLAGS $hardcode_libdir_flag_spec_CXX\""
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_cxx_try_link "$LINENO"; then :
+  if  ($OBJDUMP -p conftest$ac_exeext) 2>/dev/null | grep "RUNPATH.*$libdir" >/dev/null; then :
+  lt_cv_shlibpath_overrides_runpath=yes
+fi
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+    LDFLAGS=$save_LDFLAGS
+    libdir=$save_libdir
+
+fi
+
+  shlibpath_overrides_runpath=$lt_cv_shlibpath_overrides_runpath
+
+  # This implies no fast_install, which is unacceptable.
+  # Some rework will be needed to allow for fast_install
+  # before this can be enabled.
+  hardcode_into_libs=yes
+
+  # Ideally, we could use ldconfig to report *all* directores which are
+  # searched for libraries, however this is still not possible.  Aside from not
+  # being certain /sbin/ldconfig is available, command
+  # 'ldconfig -N -X -v | grep ^/' on 64bit Fedora does not report /usr/lib64,
+  # even though it is searched at run-time.  Try to do the best guess by
+  # appending ld.so.conf contents (and includes) to the search path.
+  if test -f /etc/ld.so.conf; then
+    lt_ld_extra=`awk '/^include / { system(sprintf("cd /etc; cat %s 2>/dev/null", \$2)); skip = 1; } { if (!skip) print \$0; skip = 0; }' < /etc/ld.so.conf | $SED -e 's/#.*//;/^[	 ]*hwcap[	 ]/d;s/[:,	]/ /g;s/=[^=]*$//;s/=[^= ]* / /g;s/"//g;/^$/d' | tr '\n' ' '`
+    sys_lib_dlsearch_path_spec="/lib /usr/lib $lt_ld_extra"
+  fi
+
+  # We used to test for /lib/ld.so.1 and disable shared libraries on
+  # powerpc, because MkLinux only supported shared libraries with the
+  # GNU dynamic linker.  Since this was broken with cross compilers,
+  # most powerpc-linux boxes support dynamic linking these days and
+  # people can always --disable-shared, the test was removed, and we
+  # assume the GNU/Linux dynamic linker is in use.
+  dynamic_linker='GNU/Linux ld.so'
+  ;;
+
+netbsdelf*-gnu)
+  version_type=linux
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major ${libname}${shared_ext}'
+  soname_spec='${libname}${release}${shared_ext}$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=no
+  hardcode_into_libs=yes
+  dynamic_linker='NetBSD ld.elf_so'
+  ;;
+
+netbsd*)
+  version_type=sunos
+  need_lib_prefix=no
+  need_version=no
+  if echo __ELF__ | $CC -E - | $GREP __ELF__ >/dev/null; then
+    library_names_spec='$libname$release$shared_ext$versuffix $libname$shared_ext$versuffix'
+    finish_cmds='PATH="\$PATH:/sbin" ldconfig -m $libdir'
+    dynamic_linker='NetBSD (a.out) ld.so'
+  else
+    library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+    soname_spec='$libname$release$shared_ext$major'
+    dynamic_linker='NetBSD ld.elf_so'
+  fi
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  hardcode_into_libs=yes
+  ;;
+
+newsos6)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  ;;
+
+*nto* | *qnx*)
+  version_type=qnx
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  soname_spec='$libname$release$shared_ext$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=no
+  hardcode_into_libs=yes
+  dynamic_linker='ldqnx.so'
+  ;;
+
+openbsd* | bitrig*)
+  version_type=sunos
+  sys_lib_dlsearch_path_spec=/usr/lib
+  need_lib_prefix=no
+  if test -z "`echo __ELF__ | $CC -E - | $GREP __ELF__`"; then
+    need_version=no
+  else
+    need_version=yes
+  fi
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$shared_ext$versuffix'
+  finish_cmds='PATH="\$PATH:/sbin" ldconfig -m $libdir'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  ;;
+
+os2*)
+  libname_spec='$name'
+  version_type=windows
+  shrext_cmds=.dll
+  need_version=no
+  need_lib_prefix=no
+  # OS/2 can only load a DLL with a base name of 8 characters or less.
+  soname_spec='`test -n "$os2dllname" && libname="$os2dllname";
+    v=$($ECHO $release$versuffix | tr -d .-);
+    n=$($ECHO $libname | cut -b -$((8 - ${#v})) | tr . _);
+    $ECHO $n$v`$shared_ext'
+  library_names_spec='${libname}_dll.$libext'
+  dynamic_linker='OS/2 ld.exe'
+  shlibpath_var=BEGINLIBPATH
+  sys_lib_search_path_spec="/lib /usr/lib /usr/local/lib"
+  sys_lib_dlsearch_path_spec=$sys_lib_search_path_spec
+  postinstall_cmds='base_file=`basename \$file`~
+    dlpath=`$SHELL 2>&1 -c '\''. $dir/'\''\$base_file'\''i; $ECHO \$dlname'\''`~
+    dldir=$destdir/`dirname \$dlpath`~
+    test -d \$dldir || mkdir -p \$dldir~
+    $install_prog $dir/$dlname \$dldir/$dlname~
+    chmod a+x \$dldir/$dlname~
+    if test -n '\''$stripme'\'' && test -n '\''$striplib'\''; then
+      eval '\''$striplib \$dldir/$dlname'\'' || exit \$?;
+    fi'
+  postuninstall_cmds='dldll=`$SHELL 2>&1 -c '\''. $file; $ECHO \$dlname'\''`~
+    dlpath=$dir/\$dldll~
+    $RM \$dlpath'
+  ;;
+
+osf3* | osf4* | osf5*)
+  version_type=osf
+  need_lib_prefix=no
+  need_version=no
+  soname_spec='$libname$release$shared_ext$major'
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  shlibpath_var=LD_LIBRARY_PATH
+  sys_lib_search_path_spec="/usr/shlib /usr/ccs/lib /usr/lib/cmplrs/cc /usr/lib /usr/local/lib /var/shlib"
+  sys_lib_dlsearch_path_spec=$sys_lib_search_path_spec
+  ;;
+
+rdos*)
+  dynamic_linker=no
+  ;;
+
+solaris*)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  soname_spec='$libname$release$shared_ext$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  hardcode_into_libs=yes
+  # ldd complains unless libraries are executable
+  postinstall_cmds='chmod +x $lib'
+  ;;
+
+sunos4*)
+  version_type=sunos
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$shared_ext$versuffix'
+  finish_cmds='PATH="\$PATH:/usr/etc" ldconfig $libdir'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  if test yes = "$with_gnu_ld"; then
+    need_lib_prefix=no
+  fi
+  need_version=yes
+  ;;
+
+sysv4 | sysv4.3*)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  soname_spec='$libname$release$shared_ext$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  case $host_vendor in
+    sni)
+      shlibpath_overrides_runpath=no
+      need_lib_prefix=no
+      runpath_var=LD_RUN_PATH
+      ;;
+    siemens)
+      need_lib_prefix=no
+      ;;
+    motorola)
+      need_lib_prefix=no
+      need_version=no
+      shlibpath_overrides_runpath=no
+      sys_lib_search_path_spec='/lib /usr/lib /usr/ccs/lib'
+      ;;
+  esac
+  ;;
+
+sysv4*MP*)
+  if test -d /usr/nec; then
+    version_type=linux # correct to gnu/linux during the next big refactor
+    library_names_spec='$libname$shared_ext.$versuffix $libname$shared_ext.$major $libname$shared_ext'
+    soname_spec='$libname$shared_ext.$major'
+    shlibpath_var=LD_LIBRARY_PATH
+  fi
+  ;;
+
+sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX* | sysv4*uw2*)
+  version_type=sco
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext $libname$shared_ext'
+  soname_spec='$libname$release$shared_ext$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  hardcode_into_libs=yes
+  if test yes = "$with_gnu_ld"; then
+    sys_lib_search_path_spec='/usr/local/lib /usr/gnu/lib /usr/ccs/lib /usr/lib /lib'
+  else
+    sys_lib_search_path_spec='/usr/ccs/lib /usr/lib'
+    case $host_os in
+      sco3.2v5*)
+        sys_lib_search_path_spec="$sys_lib_search_path_spec /lib"
+	;;
+    esac
+  fi
+  sys_lib_dlsearch_path_spec='/usr/lib'
+  ;;
+
+tpf*)
+  # TPF is a cross-target only.  Preferred cross-host = GNU/Linux.
+  version_type=linux # correct to gnu/linux during the next big refactor
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=no
+  hardcode_into_libs=yes
+  ;;
+
+uts4*)
+  version_type=linux # correct to gnu/linux during the next big refactor
+  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
+  soname_spec='$libname$release$shared_ext$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  ;;
+
+*)
+  dynamic_linker=no
+  ;;
+esac
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $dynamic_linker" >&5
+$as_echo "$dynamic_linker" >&6; }
+test no = "$dynamic_linker" && can_build_shared=no
+
+variables_saved_for_relink="PATH $shlibpath_var $runpath_var"
+if test yes = "$GCC"; then
+  variables_saved_for_relink="$variables_saved_for_relink GCC_EXEC_PREFIX COMPILER_PATH LIBRARY_PATH"
+fi
+
+if test set = "${lt_cv_sys_lib_search_path_spec+set}"; then
+  sys_lib_search_path_spec=$lt_cv_sys_lib_search_path_spec
+fi
+
+if test set = "${lt_cv_sys_lib_dlsearch_path_spec+set}"; then
+  sys_lib_dlsearch_path_spec=$lt_cv_sys_lib_dlsearch_path_spec
+fi
+
+# remember unaugmented sys_lib_dlsearch_path content for libtool script decls...
+configure_time_dlsearch_path=$sys_lib_dlsearch_path_spec
+
+# ... but it needs LT_SYS_LIBRARY_PATH munging for other configure-time code
+func_munge_path_list sys_lib_dlsearch_path_spec "$LT_SYS_LIBRARY_PATH"
+
+# to be used as default LT_SYS_LIBRARY_PATH value in generated libtool
+configure_time_lt_sys_library_path=$LT_SYS_LIBRARY_PATH
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking how to hardcode library paths into programs" >&5
+$as_echo_n "checking how to hardcode library paths into programs... " >&6; }
+hardcode_action_CXX=
+if test -n "$hardcode_libdir_flag_spec_CXX" ||
+   test -n "$runpath_var_CXX" ||
+   test yes = "$hardcode_automatic_CXX"; then
+
+  # We can hardcode non-existent directories.
+  if test no != "$hardcode_direct_CXX" &&
+     # If the only mechanism to avoid hardcoding is shlibpath_var, we
+     # have to relink, otherwise we might link with an installed library
+     # when we should be linking with a yet-to-be-installed one
+     ## test no != "$_LT_TAGVAR(hardcode_shlibpath_var, CXX)" &&
+     test no != "$hardcode_minus_L_CXX"; then
+    # Linking always hardcodes the temporary library directory.
+    hardcode_action_CXX=relink
+  else
+    # We can link without hardcoding, and we can hardcode nonexisting dirs.
+    hardcode_action_CXX=immediate
+  fi
+else
+  # We cannot hardcode anything, or else we can only hardcode existing
+  # directories.
+  hardcode_action_CXX=unsupported
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $hardcode_action_CXX" >&5
+$as_echo "$hardcode_action_CXX" >&6; }
+
+if test relink = "$hardcode_action_CXX" ||
+   test yes = "$inherit_rpath_CXX"; then
+  # Fast installation is not supported
+  enable_fast_install=no
+elif test yes = "$shlibpath_overrides_runpath" ||
+     test no = "$enable_shared"; then
+  # Fast installation is not necessary
+  enable_fast_install=needless
+fi
+
+
+
+
+
+
+
+  fi # test -n "$compiler"
+
+  CC=$lt_save_CC
+  CFLAGS=$lt_save_CFLAGS
+  LDCXX=$LD
+  LD=$lt_save_LD
+  GCC=$lt_save_GCC
+  with_gnu_ld=$lt_save_with_gnu_ld
+  lt_cv_path_LDCXX=$lt_cv_path_LD
+  lt_cv_path_LD=$lt_save_path_LD
+  lt_cv_prog_gnu_ldcxx=$lt_cv_prog_gnu_ld
+  lt_cv_prog_gnu_ld=$lt_save_with_gnu_ld
+fi # test yes != "$_lt_caught_CXX_error"
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+        ac_config_commands="$ac_config_commands libtool"
+
+
+
+
+# Only expand once:
+
+
+# By default we simply use the C compiler to build assembly code.
+
+test "${CCAS+set}" = set || CCAS=$CC
+test "${CCASFLAGS+set}" = set || CCASFLAGS=$CFLAGS
+
+
+
+depcc="$CCAS"   am_compiler_list=
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking dependency style of $depcc" >&5
+$as_echo_n "checking dependency style of $depcc... " >&6; }
+if ${am_cv_CCAS_dependencies_compiler_type+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -z "$AMDEP_TRUE" && test -f "$am_depcomp"; then
+  # We make a subdir and do the tests there.  Otherwise we can end up
+  # making bogus files that we don't know about and never remove.  For
+  # instance it was reported that on HP-UX the gcc test will end up
+  # making a dummy file named 'D' -- because '-MD' means "put the output
+  # in D".
+  rm -rf conftest.dir
+  mkdir conftest.dir
+  # Copy depcomp to subdir because otherwise we won't find it if we're
+  # using a relative directory.
+  cp "$am_depcomp" conftest.dir
+  cd conftest.dir
+  # We will build objects and dependencies in a subdirectory because
+  # it helps to detect inapplicable dependency modes.  For instance
+  # both Tru64's cc and ICC support -MD to output dependencies as a
+  # side effect of compilation, but ICC will put the dependencies in
+  # the current directory while Tru64 will put them in the object
+  # directory.
+  mkdir sub
+
+  am_cv_CCAS_dependencies_compiler_type=none
+  if test "$am_compiler_list" = ""; then
+     am_compiler_list=`sed -n 's/^#*\([a-zA-Z0-9]*\))$/\1/p' < ./depcomp`
+  fi
+  am__universal=false
+
+
+  for depmode in $am_compiler_list; do
+    # Setup a source with many dependencies, because some compilers
+    # like to wrap large dependency lists on column 80 (with \), and
+    # we should not choose a depcomp mode which is confused by this.
+    #
+    # We need to recreate these files for each test, as the compiler may
+    # overwrite some of them when testing with obscure command lines.
+    # This happens at least with the AIX C compiler.
+    : > sub/conftest.c
+    for i in 1 2 3 4 5 6; do
+      echo '#include "conftst'$i'.h"' >> sub/conftest.c
+      # Using ": > sub/conftst$i.h" creates only sub/conftst1.h with
+      # Solaris 10 /bin/sh.
+      echo '/* dummy */' > sub/conftst$i.h
+    done
+    echo "${am__include} ${am__quote}sub/conftest.Po${am__quote}" > confmf
+
+    # We check with '-c' and '-o' for the sake of the "dashmstdout"
+    # mode.  It turns out that the SunPro C++ compiler does not properly
+    # handle '-M -o', and we need to detect this.  Also, some Intel
+    # versions had trouble with output in subdirs.
+    am__obj=sub/conftest.${OBJEXT-o}
+    am__minus_obj="-o $am__obj"
+    case $depmode in
+    gcc)
+      # This depmode causes a compiler race in universal mode.
+      test "$am__universal" = false || continue
+      ;;
+    nosideeffect)
+      # After this tag, mechanisms are not by side-effect, so they'll
+      # only be used when explicitly requested.
+      if test "x$enable_dependency_tracking" = xyes; then
+	continue
+      else
+	break
+      fi
+      ;;
+    msvc7 | msvc7msys | msvisualcpp | msvcmsys)
+      # This compiler won't grok '-c -o', but also, the minuso test has
+      # not run yet.  These depmodes are late enough in the game, and
+      # so weak that their functioning should not be impacted.
+      am__obj=conftest.${OBJEXT-o}
+      am__minus_obj=
+      ;;
+    none) break ;;
+    esac
+    if depmode=$depmode \
+       source=sub/conftest.c object=$am__obj \
+       depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo \
+       $SHELL ./depcomp $depcc -c $am__minus_obj sub/conftest.c \
+         >/dev/null 2>conftest.err &&
+       grep sub/conftst1.h sub/conftest.Po > /dev/null 2>&1 &&
+       grep sub/conftst6.h sub/conftest.Po > /dev/null 2>&1 &&
+       grep $am__obj sub/conftest.Po > /dev/null 2>&1 &&
+       ${MAKE-make} -s -f confmf > /dev/null 2>&1; then
+      # icc doesn't choke on unknown options, it will just issue warnings
+      # or remarks (even with -Werror).  So we grep stderr for any message
+      # that says an option was ignored or not supported.
+      # When given -MP, icc 7.0 and 7.1 complain thusly:
+      #   icc: Command line warning: ignoring option '-M'; no argument required
+      # The diagnosis changed in icc 8.0:
+      #   icc: Command line remark: option '-MP' not supported
+      if (grep 'ignoring option' conftest.err ||
+          grep 'not supported' conftest.err) >/dev/null 2>&1; then :; else
+        am_cv_CCAS_dependencies_compiler_type=$depmode
+        break
+      fi
+    fi
+  done
+
+  cd ..
+  rm -rf conftest.dir
+else
+  am_cv_CCAS_dependencies_compiler_type=none
+fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $am_cv_CCAS_dependencies_compiler_type" >&5
+$as_echo "$am_cv_CCAS_dependencies_compiler_type" >&6; }
+CCASDEPMODE=depmode=$am_cv_CCAS_dependencies_compiler_type
+
+ if
+  test "x$enable_dependency_tracking" != xno \
+  && test "$am_cv_CCAS_dependencies_compiler_type" = gcc3; then
+  am__fastdepCCAS_TRUE=
+  am__fastdepCCAS_FALSE='#'
+else
+  am__fastdepCCAS_TRUE='#'
+  am__fastdepCCAS_FALSE=
+fi
+
+
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for __uc_get_grs in -luca" >&5
+$as_echo_n "checking for __uc_get_grs in -luca... " >&6; }
+if ${ac_cv_lib_uca___uc_get_grs+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-luca  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char __uc_get_grs ();
+int
+main ()
+{
+return __uc_get_grs ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_uca___uc_get_grs=yes
+else
+  ac_cv_lib_uca___uc_get_grs=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_uca___uc_get_grs" >&5
+$as_echo "$ac_cv_lib_uca___uc_get_grs" >&6; }
+if test "x$ac_cv_lib_uca___uc_get_grs" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LIBUCA 1
+_ACEOF
+
+  LIBS="-luca $LIBS"
+
+fi
+
+OLD_LIBS=${LIBS}
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing dlopen" >&5
+$as_echo_n "checking for library containing dlopen... " >&6; }
+if ${ac_cv_search_dlopen+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_func_search_save_LIBS=$LIBS
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char dlopen ();
+int
+main ()
+{
+return dlopen ();
+  ;
+  return 0;
+}
+_ACEOF
+for ac_lib in '' dl; do
+  if test -z "$ac_lib"; then
+    ac_res="none required"
+  else
+    ac_res=-l$ac_lib
+    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+  fi
+  if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_search_dlopen=$ac_res
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext
+  if ${ac_cv_search_dlopen+:} false; then :
+  break
+fi
+done
+if ${ac_cv_search_dlopen+:} false; then :
+
+else
+  ac_cv_search_dlopen=no
+fi
+rm conftest.$ac_ext
+LIBS=$ac_func_search_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_dlopen" >&5
+$as_echo "$ac_cv_search_dlopen" >&6; }
+ac_res=$ac_cv_search_dlopen
+if test "$ac_res" != no; then :
+  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
+
+fi
+
+LIBS=${OLD_LIBS}
+case "$ac_cv_search_dlopen" in
+  -l*) DLLIB=$ac_cv_search_dlopen;;
+  *) DLLIB="";;
+esac
+
+  for ac_header in atomic_ops.h
+do :
+  ac_fn_c_check_header_mongrel "$LINENO" "atomic_ops.h" "ac_cv_header_atomic_ops_h" "$ac_includes_default"
+if test "x$ac_cv_header_atomic_ops_h" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_ATOMIC_OPS_H 1
+_ACEOF
+
+fi
+
+done
+
+#
+# Don't link against libatomic_ops for now.  We don't want libunwind
+# to depend on libatomic_ops.so.  Fortunately, none of the platforms
+# we care about so far need libatomic_ops.a (everything is done via
+# inline macros).
+#
+#  AC_CHECK_LIB(atomic_ops, main)
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for ANSI C header files" >&5
+$as_echo_n "checking for ANSI C header files... " >&6; }
+if ${ac_cv_header_stdc+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <float.h>
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_header_stdc=yes
+else
+  ac_cv_header_stdc=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+
+if test $ac_cv_header_stdc = yes; then
+  # SunOS 4.x string.h does not declare mem*, contrary to ANSI.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <string.h>
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "memchr" >/dev/null 2>&1; then :
+
+else
+  ac_cv_header_stdc=no
+fi
+rm -f conftest*
+
+fi
+
+if test $ac_cv_header_stdc = yes; then
+  # ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdlib.h>
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "free" >/dev/null 2>&1; then :
+
+else
+  ac_cv_header_stdc=no
+fi
+rm -f conftest*
+
+fi
+
+if test $ac_cv_header_stdc = yes; then
+  # /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi.
+  if test "$cross_compiling" = yes; then :
+  :
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <ctype.h>
+#include <stdlib.h>
+#if ((' ' & 0x0FF) == 0x020)
+# define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
+# define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c))
+#else
+# define ISLOWER(c) \
+		   (('a' <= (c) && (c) <= 'i') \
+		     || ('j' <= (c) && (c) <= 'r') \
+		     || ('s' <= (c) && (c) <= 'z'))
+# define TOUPPER(c) (ISLOWER(c) ? ((c) | 0x40) : (c))
+#endif
+
+#define XOR(e, f) (((e) && !(f)) || (!(e) && (f)))
+int
+main ()
+{
+  int i;
+  for (i = 0; i < 256; i++)
+    if (XOR (islower (i), ISLOWER (i))
+	|| toupper (i) != TOUPPER (i))
+      return 2;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"; then :
+
+else
+  ac_cv_header_stdc=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_header_stdc" >&5
+$as_echo "$ac_cv_header_stdc" >&6; }
+if test $ac_cv_header_stdc = yes; then
+
+$as_echo "#define STDC_HEADERS 1" >>confdefs.h
+
+fi
+
+for ac_header in asm/ptrace_offsets.h endian.h sys/endian.h execinfo.h \
+		ia64intrin.h sys/uc_access.h unistd.h signal.h sys/types.h \
+		sys/procfs.h sys/ptrace.h byteswap.h elf.h sys/elf.h link.h sys/link.h
+do :
+  as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
+ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"
+if eval test \"x\$"$as_ac_Header"\" = x"yes"; then :
+  cat >>confdefs.h <<_ACEOF
+#define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+
+done
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for an ANSI C-conforming const" >&5
+$as_echo_n "checking for an ANSI C-conforming const... " >&6; }
+if ${ac_cv_c_const+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+#ifndef __cplusplus
+  /* Ultrix mips cc rejects this sort of thing.  */
+  typedef int charset[2];
+  const charset cs = { 0, 0 };
+  /* SunOS 4.1.1 cc rejects this.  */
+  char const *const *pcpcc;
+  char **ppc;
+  /* NEC SVR4.0.2 mips cc rejects this.  */
+  struct point {int x, y;};
+  static struct point const zero = {0,0};
+  /* AIX XL C 1.02.0.0 rejects this.
+     It does not let you subtract one const X* pointer from another in
+     an arm of an if-expression whose if-part is not a constant
+     expression */
+  const char *g = "string";
+  pcpcc = &g + (g ? g-g : 0);
+  /* HPUX 7.0 cc rejects these. */
+  ++pcpcc;
+  ppc = (char**) pcpcc;
+  pcpcc = (char const *const *) ppc;
+  { /* SCO 3.2v4 cc rejects this sort of thing.  */
+    char tx;
+    char *t = &tx;
+    char const *s = 0 ? (char *) 0 : (char const *) 0;
+
+    *t++ = 0;
+    if (s) return 0;
+  }
+  { /* Someone thinks the Sun supposedly-ANSI compiler will reject this.  */
+    int x[] = {25, 17};
+    const int *foo = &x[0];
+    ++foo;
+  }
+  { /* Sun SC1.0 ANSI compiler rejects this -- but not the above. */
+    typedef const int *iptr;
+    iptr p = 0;
+    ++p;
+  }
+  { /* AIX XL C 1.02.0.0 rejects this sort of thing, saying
+       "k.c", line 2.27: 1506-025 (S) Operand must be a modifiable lvalue. */
+    struct s { int j; const int *ap[3]; } bx;
+    struct s *b = &bx; b->j = 5;
+  }
+  { /* ULTRIX-32 V3.1 (Rev 9) vcc rejects this */
+    const int foo = 10;
+    if (!foo) return 0;
+  }
+  return !cs[0] && !zero.x;
+#endif
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_c_const=yes
+else
+  ac_cv_c_const=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_const" >&5
+$as_echo "$ac_cv_c_const" >&6; }
+if test $ac_cv_c_const = no; then
+
+$as_echo "#define const /**/" >>confdefs.h
+
+fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for inline" >&5
+$as_echo_n "checking for inline... " >&6; }
+if ${ac_cv_c_inline+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_cv_c_inline=no
+for ac_kw in inline __inline__ __inline; do
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#ifndef __cplusplus
+typedef int foo_t;
+static $ac_kw foo_t static_foo () {return 0; }
+$ac_kw foo_t foo () {return 0; }
+#endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_c_inline=$ac_kw
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+  test "$ac_cv_c_inline" != no && break
+done
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_inline" >&5
+$as_echo "$ac_cv_c_inline" >&6; }
+
+case $ac_cv_c_inline in
+  inline | yes) ;;
+  *)
+    case $ac_cv_c_inline in
+      no) ac_val=;;
+      *) ac_val=$ac_cv_c_inline;;
+    esac
+    cat >>confdefs.h <<_ACEOF
+#ifndef __cplusplus
+#define inline $ac_val
+#endif
+_ACEOF
+    ;;
+esac
+
+ac_fn_c_check_type "$LINENO" "size_t" "ac_cv_type_size_t" "$ac_includes_default"
+if test "x$ac_cv_type_size_t" = xyes; then :
+
+else
+
+cat >>confdefs.h <<_ACEOF
+#define size_t unsigned int
+_ACEOF
+
+fi
+
+# The cast to long int works around a bug in the HP C Compiler
+# version HP92453-01 B.11.11.23709.GP, which incorrectly rejects
+# declarations like `int a3[[(sizeof (unsigned char)) >= 0]];'.
+# This bug is HP SR number 8606223364.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking size of off_t" >&5
+$as_echo_n "checking size of off_t... " >&6; }
+if ${ac_cv_sizeof_off_t+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (off_t))" "ac_cv_sizeof_off_t"        "$ac_includes_default"; then :
+
+else
+  if test "$ac_cv_type_off_t" = yes; then
+     { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error 77 "cannot compute sizeof (off_t)
+See \`config.log' for more details" "$LINENO" 5; }
+   else
+     ac_cv_sizeof_off_t=0
+   fi
+fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sizeof_off_t" >&5
+$as_echo "$ac_cv_sizeof_off_t" >&6; }
+
+
+
+cat >>confdefs.h <<_ACEOF
+#define SIZEOF_OFF_T $ac_cv_sizeof_off_t
+_ACEOF
+
+
+
+CPPFLAGS="${CPPFLAGS} -D_GNU_SOURCE"
+
+ac_fn_c_check_member "$LINENO" "struct dl_phdr_info" "dlpi_subs" "ac_cv_member_struct_dl_phdr_info_dlpi_subs" "#include <link.h>
+"
+if test "x$ac_cv_member_struct_dl_phdr_info_dlpi_subs" = xyes; then :
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_STRUCT_DL_PHDR_INFO_DLPI_SUBS 1
+_ACEOF
+
+
+fi
+
+ac_fn_c_check_type "$LINENO" "struct elf_prstatus" "ac_cv_type_struct_elf_prstatus" "$ac_includes_default
+#if HAVE_SYS_PROCFS_H
+# include <sys/procfs.h>
+#endif
+
+"
+if test "x$ac_cv_type_struct_elf_prstatus" = xyes; then :
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_STRUCT_ELF_PRSTATUS 1
+_ACEOF
+
+
+fi
+ac_fn_c_check_type "$LINENO" "struct prstatus" "ac_cv_type_struct_prstatus" "$ac_includes_default
+#if HAVE_SYS_PROCFS_H
+# include <sys/procfs.h>
+#endif
+
+"
+if test "x$ac_cv_type_struct_prstatus" = xyes; then :
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_STRUCT_PRSTATUS 1
+_ACEOF
+
+
+fi
+
+
+ac_fn_c_check_decl "$LINENO" "PTRACE_POKEUSER" "ac_cv_have_decl_PTRACE_POKEUSER" "$ac_includes_default
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#include <sys/ptrace.h>
+
+"
+if test "x$ac_cv_have_decl_PTRACE_POKEUSER" = xyes; then :
+  ac_have_decl=1
+else
+  ac_have_decl=0
+fi
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DECL_PTRACE_POKEUSER $ac_have_decl
+_ACEOF
+ac_fn_c_check_decl "$LINENO" "PTRACE_POKEDATA" "ac_cv_have_decl_PTRACE_POKEDATA" "$ac_includes_default
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#include <sys/ptrace.h>
+
+"
+if test "x$ac_cv_have_decl_PTRACE_POKEDATA" = xyes; then :
+  ac_have_decl=1
+else
+  ac_have_decl=0
+fi
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DECL_PTRACE_POKEDATA $ac_have_decl
+_ACEOF
+ac_fn_c_check_decl "$LINENO" "PTRACE_SETREGSET" "ac_cv_have_decl_PTRACE_SETREGSET" "$ac_includes_default
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#include <sys/ptrace.h>
+
+"
+if test "x$ac_cv_have_decl_PTRACE_SETREGSET" = xyes; then :
+  ac_have_decl=1
+else
+  ac_have_decl=0
+fi
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DECL_PTRACE_SETREGSET $ac_have_decl
+_ACEOF
+ac_fn_c_check_decl "$LINENO" "PTRACE_TRACEME" "ac_cv_have_decl_PTRACE_TRACEME" "$ac_includes_default
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#include <sys/ptrace.h>
+
+"
+if test "x$ac_cv_have_decl_PTRACE_TRACEME" = xyes; then :
+  ac_have_decl=1
+else
+  ac_have_decl=0
+fi
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DECL_PTRACE_TRACEME $ac_have_decl
+_ACEOF
+ac_fn_c_check_decl "$LINENO" "PTRACE_CONT" "ac_cv_have_decl_PTRACE_CONT" "$ac_includes_default
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#include <sys/ptrace.h>
+
+"
+if test "x$ac_cv_have_decl_PTRACE_CONT" = xyes; then :
+  ac_have_decl=1
+else
+  ac_have_decl=0
+fi
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DECL_PTRACE_CONT $ac_have_decl
+_ACEOF
+ac_fn_c_check_decl "$LINENO" "PTRACE_SINGLESTEP" "ac_cv_have_decl_PTRACE_SINGLESTEP" "$ac_includes_default
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#include <sys/ptrace.h>
+
+"
+if test "x$ac_cv_have_decl_PTRACE_SINGLESTEP" = xyes; then :
+  ac_have_decl=1
+else
+  ac_have_decl=0
+fi
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DECL_PTRACE_SINGLESTEP $ac_have_decl
+_ACEOF
+ac_fn_c_check_decl "$LINENO" "PTRACE_SYSCALL" "ac_cv_have_decl_PTRACE_SYSCALL" "$ac_includes_default
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#include <sys/ptrace.h>
+
+"
+if test "x$ac_cv_have_decl_PTRACE_SYSCALL" = xyes; then :
+  ac_have_decl=1
+else
+  ac_have_decl=0
+fi
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DECL_PTRACE_SYSCALL $ac_have_decl
+_ACEOF
+ac_fn_c_check_decl "$LINENO" "PT_IO" "ac_cv_have_decl_PT_IO" "$ac_includes_default
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#include <sys/ptrace.h>
+
+"
+if test "x$ac_cv_have_decl_PT_IO" = xyes; then :
+  ac_have_decl=1
+else
+  ac_have_decl=0
+fi
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DECL_PT_IO $ac_have_decl
+_ACEOF
+ac_fn_c_check_decl "$LINENO" "PT_GETREGS" "ac_cv_have_decl_PT_GETREGS" "$ac_includes_default
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#include <sys/ptrace.h>
+
+"
+if test "x$ac_cv_have_decl_PT_GETREGS" = xyes; then :
+  ac_have_decl=1
+else
+  ac_have_decl=0
+fi
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DECL_PT_GETREGS $ac_have_decl
+_ACEOF
+ac_fn_c_check_decl "$LINENO" "PT_GETFPREGS" "ac_cv_have_decl_PT_GETFPREGS" "$ac_includes_default
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#include <sys/ptrace.h>
+
+"
+if test "x$ac_cv_have_decl_PT_GETFPREGS" = xyes; then :
+  ac_have_decl=1
+else
+  ac_have_decl=0
+fi
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DECL_PT_GETFPREGS $ac_have_decl
+_ACEOF
+ac_fn_c_check_decl "$LINENO" "PT_CONTINUE" "ac_cv_have_decl_PT_CONTINUE" "$ac_includes_default
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#include <sys/ptrace.h>
+
+"
+if test "x$ac_cv_have_decl_PT_CONTINUE" = xyes; then :
+  ac_have_decl=1
+else
+  ac_have_decl=0
+fi
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DECL_PT_CONTINUE $ac_have_decl
+_ACEOF
+ac_fn_c_check_decl "$LINENO" "PT_TRACE_ME" "ac_cv_have_decl_PT_TRACE_ME" "$ac_includes_default
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#include <sys/ptrace.h>
+
+"
+if test "x$ac_cv_have_decl_PT_TRACE_ME" = xyes; then :
+  ac_have_decl=1
+else
+  ac_have_decl=0
+fi
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DECL_PT_TRACE_ME $ac_have_decl
+_ACEOF
+ac_fn_c_check_decl "$LINENO" "PT_STEP" "ac_cv_have_decl_PT_STEP" "$ac_includes_default
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#include <sys/ptrace.h>
+
+"
+if test "x$ac_cv_have_decl_PT_STEP" = xyes; then :
+  ac_have_decl=1
+else
+  ac_have_decl=0
+fi
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DECL_PT_STEP $ac_have_decl
+_ACEOF
+ac_fn_c_check_decl "$LINENO" "PT_SYSCALL" "ac_cv_have_decl_PT_SYSCALL" "$ac_includes_default
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#include <sys/ptrace.h>
+
+"
+if test "x$ac_cv_have_decl_PT_SYSCALL" = xyes; then :
+  ac_have_decl=1
+else
+  ac_have_decl=0
+fi
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DECL_PT_SYSCALL $ac_have_decl
+_ACEOF
+
+
+for ac_func in dl_iterate_phdr dl_phdr_removals_counter dlmodinfo getunwind \
+		ttrace mincore
+do :
+  as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
+ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
+if eval test \"x\$"$as_ac_var"\" = x"yes"; then :
+  cat >>confdefs.h <<_ACEOF
+#define `$as_echo "HAVE_$ac_func" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+done
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if building with AltiVec" >&5
+$as_echo_n "checking if building with AltiVec... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#ifndef __ALTIVEC__
+# error choke
+#endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  use_altivec=yes
+else
+  use_altivec=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ if test x$use_altivec = xyes; then
+  USE_ALTIVEC_TRUE=
+  USE_ALTIVEC_FALSE='#'
+else
+  USE_ALTIVEC_TRUE='#'
+  USE_ALTIVEC_FALSE=
+fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $use_altivec" >&5
+$as_echo "$use_altivec" >&6; }
+
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#ifndef __powerpc64__
+# error choke
+#endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ppc_bits=64
+else
+  ppc_bits=32
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+
+
+
+    case $build_cpu in #(
+  aarch64*) :
+    build_arch=aarch64 ;; #(
+  arm*) :
+    build_arch=arm ;; #(
+  i?86) :
+    build_arch=x86 ;; #(
+  hppa*) :
+    build_arch=hppa ;; #(
+  mips*) :
+    build_arch=mips ;; #(
+  powerpc*) :
+    build_arch=ppc$ppc_bits ;; #(
+  sh*) :
+    build_arch=sh ;; #(
+  amd64) :
+    build_arch=x86_64 ;; #(
+  tile*) :
+    build_arch=tilegx ;; #(
+  *) :
+    build_arch=$build_cpu ;;
+esac
+
+
+    case $host_cpu in #(
+  aarch64*) :
+    host_arch=aarch64 ;; #(
+  arm*) :
+    host_arch=arm ;; #(
+  i?86) :
+    host_arch=x86 ;; #(
+  hppa*) :
+    host_arch=hppa ;; #(
+  mips*) :
+    host_arch=mips ;; #(
+  powerpc*) :
+    host_arch=ppc$ppc_bits ;; #(
+  sh*) :
+    host_arch=sh ;; #(
+  amd64) :
+    host_arch=x86_64 ;; #(
+  tile*) :
+    host_arch=tilegx ;; #(
+  *) :
+    host_arch=$host_cpu ;;
+esac
+
+
+    case $target_cpu in #(
+  aarch64*) :
+    target_arch=aarch64 ;; #(
+  arm*) :
+    target_arch=arm ;; #(
+  i?86) :
+    target_arch=x86 ;; #(
+  hppa*) :
+    target_arch=hppa ;; #(
+  mips*) :
+    target_arch=mips ;; #(
+  powerpc*) :
+    target_arch=ppc$ppc_bits ;; #(
+  sh*) :
+    target_arch=sh ;; #(
+  amd64) :
+    target_arch=x86_64 ;; #(
+  tile*) :
+    target_arch=tilegx ;; #(
+  *) :
+    target_arch=$target_cpu ;;
+esac
+
+
+# Check for Android
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for Android" >&5
+$as_echo_n "checking for Android... " >&6; }
+android="no"
+case "$host_os" in
+  *android*)
+    android="yes"
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+    ;;
+  *)
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+    ;;
+esac
+
+# Check whether --enable-coredump was given.
+if test "${enable_coredump+set}" = set; then :
+  enableval=$enable_coredump;
+else
+  case $host_arch in #(
+  aarch64*|arm*|mips*|sh*|x86*|tile*) :
+    enable_coredump=yes ;; #(
+  *) :
+    enable_coredump=no ;;
+esac
+
+fi
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if we should build libunwind-coredump" >&5
+$as_echo_n "checking if we should build libunwind-coredump... " >&6; }
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_coredump" >&5
+$as_echo "$enable_coredump" >&6; }
+
+# Check whether --enable-ptrace was given.
+if test "${enable_ptrace+set}" = set; then :
+  enableval=$enable_ptrace;
+else
+  ac_fn_c_check_header_mongrel "$LINENO" "sys/ptrace.h" "ac_cv_header_sys_ptrace_h" "$ac_includes_default"
+if test "x$ac_cv_header_sys_ptrace_h" = xyes; then :
+  enable_ptrace=yes
+else
+  enable_ptrace=no
+fi
+
+
+
+fi
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if we should build libunwind-ptrace" >&5
+$as_echo_n "checking if we should build libunwind-ptrace... " >&6; }
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_ptrace" >&5
+$as_echo "$enable_ptrace" >&6; }
+
+# Check whether --enable-setjmp was given.
+if test "${enable_setjmp+set}" = set; then :
+  enableval=$enable_setjmp;
+else
+  if test x$target_arch == x$host_arch; then :
+  enable_setjmp=yes
+else
+  enable_setjmp=no
+fi
+
+fi
+
+
+# Check whether --enable-documentation was given.
+if test "${enable_documentation+set}" = set; then :
+  enableval=$enable_documentation;
+else
+  enable_documentation=yes
+fi
+
+
+# Check whether --enable-tests was given.
+if test "${enable_tests+set}" = set; then :
+  enableval=$enable_tests;
+else
+  enable_tests=yes
+fi
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if we should build libunwind-setjmp" >&5
+$as_echo_n "checking if we should build libunwind-setjmp... " >&6; }
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_setjmp" >&5
+$as_echo "$enable_setjmp" >&6; }
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for build architecture" >&5
+$as_echo_n "checking for build architecture... " >&6; }
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $build_arch" >&5
+$as_echo "$build_arch" >&6; }
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for host architecture" >&5
+$as_echo_n "checking for host architecture... " >&6; }
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $host_arch" >&5
+$as_echo "$host_arch" >&6; }
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for target architecture" >&5
+$as_echo_n "checking for target architecture... " >&6; }
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $target_arch" >&5
+$as_echo "$target_arch" >&6; }
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for target operating system" >&5
+$as_echo_n "checking for target operating system... " >&6; }
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $target_os" >&5
+$as_echo "$target_os" >&6; }
+
+ if test x$enable_coredump = xyes; then
+  BUILD_COREDUMP_TRUE=
+  BUILD_COREDUMP_FALSE='#'
+else
+  BUILD_COREDUMP_TRUE='#'
+  BUILD_COREDUMP_FALSE=
+fi
+
+ if test x$enable_ptrace = xyes; then
+  BUILD_PTRACE_TRUE=
+  BUILD_PTRACE_FALSE='#'
+else
+  BUILD_PTRACE_TRUE='#'
+  BUILD_PTRACE_FALSE=
+fi
+
+ if test x$enable_setjmp = xyes; then
+  BUILD_SETJMP_TRUE=
+  BUILD_SETJMP_FALSE='#'
+else
+  BUILD_SETJMP_TRUE='#'
+  BUILD_SETJMP_FALSE=
+fi
+
+ if test x$build_arch != x$host_arch; then
+  NO_PTRACE_TEST_TRUE=
+  NO_PTRACE_TEST_FALSE='#'
+else
+  NO_PTRACE_TEST_TRUE='#'
+  NO_PTRACE_TEST_FALSE=
+fi
+
+ if test x$target_arch != x$host_arch; then
+  REMOTE_ONLY_TRUE=
+  REMOTE_ONLY_FALSE='#'
+else
+  REMOTE_ONLY_TRUE='#'
+  REMOTE_ONLY_FALSE=
+fi
+
+ if test x$target_arch = xaarch64; then
+  ARCH_AARCH64_TRUE=
+  ARCH_AARCH64_FALSE='#'
+else
+  ARCH_AARCH64_TRUE='#'
+  ARCH_AARCH64_FALSE=
+fi
+
+ if test x$target_arch = xarm; then
+  ARCH_ARM_TRUE=
+  ARCH_ARM_FALSE='#'
+else
+  ARCH_ARM_TRUE='#'
+  ARCH_ARM_FALSE=
+fi
+
+ if test x$target_arch = xia64; then
+  ARCH_IA64_TRUE=
+  ARCH_IA64_FALSE='#'
+else
+  ARCH_IA64_TRUE='#'
+  ARCH_IA64_FALSE=
+fi
+
+ if test x$target_arch = xhppa; then
+  ARCH_HPPA_TRUE=
+  ARCH_HPPA_FALSE='#'
+else
+  ARCH_HPPA_TRUE='#'
+  ARCH_HPPA_FALSE=
+fi
+
+ if test x$target_arch = xmips; then
+  ARCH_MIPS_TRUE=
+  ARCH_MIPS_FALSE='#'
+else
+  ARCH_MIPS_TRUE='#'
+  ARCH_MIPS_FALSE=
+fi
+
+ if test x$target_arch = xx86; then
+  ARCH_X86_TRUE=
+  ARCH_X86_FALSE='#'
+else
+  ARCH_X86_TRUE='#'
+  ARCH_X86_FALSE=
+fi
+
+ if test x$target_arch = xx86_64; then
+  ARCH_X86_64_TRUE=
+  ARCH_X86_64_FALSE='#'
+else
+  ARCH_X86_64_TRUE='#'
+  ARCH_X86_64_FALSE=
+fi
+
+ if test x$target_arch = xppc32; then
+  ARCH_PPC32_TRUE=
+  ARCH_PPC32_FALSE='#'
+else
+  ARCH_PPC32_TRUE='#'
+  ARCH_PPC32_FALSE=
+fi
+
+ if test x$target_arch = xppc64; then
+  ARCH_PPC64_TRUE=
+  ARCH_PPC64_FALSE='#'
+else
+  ARCH_PPC64_TRUE='#'
+  ARCH_PPC64_FALSE=
+fi
+
+ if test x$target_arch = xsh; then
+  ARCH_SH_TRUE=
+  ARCH_SH_FALSE='#'
+else
+  ARCH_SH_TRUE='#'
+  ARCH_SH_FALSE=
+fi
+
+ if test x$target_arch = xtilegx; then
+  ARCH_TILEGX_TRUE=
+  ARCH_TILEGX_FALSE='#'
+else
+  ARCH_TILEGX_TRUE='#'
+  ARCH_TILEGX_FALSE=
+fi
+
+ if test x$target_arch = xs390x; then
+  ARCH_S390X_TRUE=
+  ARCH_S390X_FALSE='#'
+else
+  ARCH_S390X_TRUE='#'
+  ARCH_S390X_FALSE=
+fi
+
+ if expr x$target_os : xlinux >/dev/null; then
+  OS_LINUX_TRUE=
+  OS_LINUX_FALSE='#'
+else
+  OS_LINUX_TRUE='#'
+  OS_LINUX_FALSE=
+fi
+
+ if expr x$target_os : xhpux >/dev/null; then
+  OS_HPUX_TRUE=
+  OS_HPUX_FALSE='#'
+else
+  OS_HPUX_TRUE='#'
+  OS_HPUX_FALSE=
+fi
+
+ if expr x$target_os : xfreebsd >/dev/null; then
+  OS_FREEBSD_TRUE=
+  OS_FREEBSD_FALSE='#'
+else
+  OS_FREEBSD_TRUE='#'
+  OS_FREEBSD_FALSE=
+fi
+
+ if expr x$target_os : xnto-qnx >/dev/null; then
+  OS_QNX_TRUE=
+  OS_QNX_FALSE='#'
+else
+  OS_QNX_TRUE='#'
+  OS_QNX_FALSE=
+fi
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for ELF helper width" >&5
+$as_echo_n "checking for ELF helper width... " >&6; }
+case "${target_arch}" in
+(arm|hppa|ppc32|x86|sh) use_elf32=yes; { $as_echo "$as_me:${as_lineno-$LINENO}: result: 32" >&5
+$as_echo "32" >&6; };;
+(aarch64|ia64|ppc64|x86_64|s390x|tilegx)  use_elf64=yes; { $as_echo "$as_me:${as_lineno-$LINENO}: result: 64" >&5
+$as_echo "64" >&6; };;
+(mips)                 use_elfxx=yes; { $as_echo "$as_me:${as_lineno-$LINENO}: result: xx" >&5
+$as_echo "xx" >&6; };;
+*)                     as_fn_error $? "Unknown ELF target: ${target_arch}" "$LINENO" 5
+esac
+ if test x$use_elf32 = xyes; then
+  USE_ELF32_TRUE=
+  USE_ELF32_FALSE='#'
+else
+  USE_ELF32_TRUE='#'
+  USE_ELF32_FALSE=
+fi
+
+ if test x$use_elf64 = xyes; then
+  USE_ELF64_TRUE=
+  USE_ELF64_FALSE='#'
+else
+  USE_ELF64_TRUE='#'
+  USE_ELF64_FALSE=
+fi
+
+ if test x$use_elfxx = xyes; then
+  USE_ELFXX_TRUE=
+  USE_ELFXX_FALSE='#'
+else
+  USE_ELFXX_TRUE='#'
+  USE_ELFXX_FALSE=
+fi
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to include DWARF support" >&5
+$as_echo_n "checking whether to include DWARF support... " >&6; }
+if test x$target_arch != xia64; then
+  use_dwarf=yes
+else
+  use_dwarf=no
+fi
+ if test x$use_dwarf = xyes; then
+  USE_DWARF_TRUE=
+  USE_DWARF_FALSE='#'
+else
+  USE_DWARF_TRUE='#'
+  USE_DWARF_FALSE=
+fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $use_dwarf" >&5
+$as_echo "$use_dwarf" >&6; }
+
+if test x$target_arch = xppc64; then
+        libdir='${exec_prefix}/lib64'
+        { $as_echo "$as_me:${as_lineno-$LINENO}: PowerPC64 detected, lib will be installed ${libdir}" >&5
+$as_echo "$as_me: PowerPC64 detected, lib will be installed ${libdir}" >&6;};
+
+fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to restrict build to remote support" >&5
+$as_echo_n "checking whether to restrict build to remote support... " >&6; }
+if test x$target_arch != x$host_arch; then
+  CPPFLAGS="${CPPFLAGS} -DUNW_REMOTE_ONLY"
+  remote_only=yes
+else
+  remote_only=no
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $remote_only" >&5
+$as_echo "$remote_only" >&6; }
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to enable debug support" >&5
+$as_echo_n "checking whether to enable debug support... " >&6; }
+# Check whether --enable-debug was given.
+if test "${enable_debug+set}" = set; then :
+  enableval=$enable_debug;
+fi
+
+if test x$enable_debug = xyes; then
+  CPPFLAGS="${CPPFLAGS} -DDEBUG"
+else
+  CPPFLAGS="${CPPFLAGS} -DNDEBUG"
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_debug" >&5
+$as_echo "$enable_debug" >&6; }
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to enable C++ exception support" >&5
+$as_echo_n "checking whether to enable C++ exception support... " >&6; }
+# Check whether --enable-cxx_exceptions was given.
+if test "${enable_cxx_exceptions+set}" = set; then :
+  enableval=$enable_cxx_exceptions;
+else
+
+# C++ exception handling doesn't work too well on x86
+case $target_arch in
+  x86*) enable_cxx_exceptions=no;;
+  aarch64*) enable_cxx_exceptions=no;;
+  arm*) enable_cxx_exceptions=no;;
+  mips*) enable_cxx_exceptions=no;;
+  tile*) enable_cxx_exceptions=no;;
+  *) enable_cxx_exceptions=yes;;
+esac
+
+fi
+
+
+ if test x$enable_cxx_exceptions = xyes; then
+  SUPPORT_CXX_EXCEPTIONS_TRUE=
+  SUPPORT_CXX_EXCEPTIONS_FALSE='#'
+else
+  SUPPORT_CXX_EXCEPTIONS_TRUE='#'
+  SUPPORT_CXX_EXCEPTIONS_FALSE=
+fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_cxx_exceptions" >&5
+$as_echo "$enable_cxx_exceptions" >&6; }
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to load .debug_frame sections" >&5
+$as_echo_n "checking whether to load .debug_frame sections... " >&6; }
+# Check whether --enable-debug_frame was given.
+if test "${enable_debug_frame+set}" = set; then :
+  enableval=$enable_debug_frame;
+else
+
+case "${target_arch}" in
+  (arm) enable_debug_frame=yes;;
+  (aarch64) enable_debug_frame=yes;;
+  (*)   enable_debug_frame=no;;
+esac
+fi
+
+if test x$enable_debug_frame = xyes; then
+
+$as_echo "#define CONFIG_DEBUG_FRAME /**/" >>confdefs.h
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_debug_frame" >&5
+$as_echo "$enable_debug_frame" >&6; }
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to block signals during mutex ops" >&5
+$as_echo_n "checking whether to block signals during mutex ops... " >&6; }
+# Check whether --enable-block_signals was given.
+if test "${enable_block_signals+set}" = set; then :
+  enableval=$enable_block_signals;
+else
+  enable_block_signals=yes
+fi
+
+if test x$enable_block_signals = xyes; then
+
+$as_echo "#define CONFIG_BLOCK_SIGNALS /**/" >>confdefs.h
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_block_signals" >&5
+$as_echo "$enable_block_signals" >&6; }
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to validate memory addresses before use" >&5
+$as_echo_n "checking whether to validate memory addresses before use... " >&6; }
+# Check whether --enable-conservative_checks was given.
+if test "${enable_conservative_checks+set}" = set; then :
+  enableval=$enable_conservative_checks;
+else
+  enable_conservative_checks=yes
+fi
+
+if test x$enable_conservative_checks = xyes; then
+
+$as_echo "#define CONSERVATIVE_CHECKS 1" >>confdefs.h
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_conservative_checks" >&5
+$as_echo "$enable_conservative_checks" >&6; }
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to enable msabi support" >&5
+$as_echo_n "checking whether to enable msabi support... " >&6; }
+# Check whether --enable-msabi_support was given.
+if test "${enable_msabi_support+set}" = set; then :
+  enableval=$enable_msabi_support;
+fi
+
+if test x$enable_msabi_support = xyes; then
+
+$as_echo "#define CONFIG_MSABI_SUPPORT /**/" >>confdefs.h
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_msabi_support" >&5
+$as_echo "$enable_msabi_support" >&6; }
+
+LIBLZMA=
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to support LZMA-compressed symbol tables" >&5
+$as_echo_n "checking whether to support LZMA-compressed symbol tables... " >&6; }
+# Check whether --enable-minidebuginfo was given.
+if test "${enable_minidebuginfo+set}" = set; then :
+  enableval=$enable_minidebuginfo;
+else
+  enable_minidebuginfo=auto
+fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_minidebuginfo" >&5
+$as_echo "$enable_minidebuginfo" >&6; }
+if test x$enable_minidebuginfo != xno; then
+   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for lzma_mf_is_supported in -llzma" >&5
+$as_echo_n "checking for lzma_mf_is_supported in -llzma... " >&6; }
+if ${ac_cv_lib_lzma_lzma_mf_is_supported+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-llzma  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char lzma_mf_is_supported ();
+int
+main ()
+{
+return lzma_mf_is_supported ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_lzma_lzma_mf_is_supported=yes
+else
+  ac_cv_lib_lzma_lzma_mf_is_supported=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_lzma_lzma_mf_is_supported" >&5
+$as_echo "$ac_cv_lib_lzma_lzma_mf_is_supported" >&6; }
+if test "x$ac_cv_lib_lzma_lzma_mf_is_supported" = xyes; then :
+  LIBLZMA=-llzma
+
+$as_echo "#define HAVE_LZMA 1" >>confdefs.h
+
+    enable_minidebuginfo=yes
+else
+  if test x$enable_minidebuginfo = xyes; then
+      { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "liblzma not found
+See \`config.log' for more details" "$LINENO" 5; }
+    fi
+fi
+
+fi
+
+ if test x$enable_minidebuginfo = xyes; then
+  HAVE_LZMA_TRUE=
+  HAVE_LZMA_FALSE='#'
+else
+  HAVE_LZMA_TRUE='#'
+  HAVE_LZMA_FALSE=
+fi
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to support UNW_CACHE_PER_THREAD" >&5
+$as_echo_n "checking whether to support UNW_CACHE_PER_THREAD... " >&6; }
+# Check whether --enable-per-thread-cache was given.
+if test "${enable_per_thread_cache+set}" = set; then :
+  enableval=$enable_per_thread_cache;
+fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_per_thread_cache" >&5
+$as_echo "$enable_per_thread_cache" >&6; }
+if test x$enable_per_thread_cache = xyes; then :
+
+  if test "x$enable___thread" != xno; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for __thread" >&5
+$as_echo_n "checking for __thread... " >&6; }
+if ${libc_cv_gcc___thread+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat > conftest.c <<\EOF
+    __thread int a = 42;
+EOF
+  if { ac_try='${CC-cc} $CFLAGS -c conftest.c >&5'
+  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }; then
+    libc_cv_gcc___thread=yes
+  else
+    libc_cv_gcc___thread=no
+  fi
+  rm -f conftest*
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_gcc___thread" >&5
+$as_echo "$libc_cv_gcc___thread" >&6; }
+  if test "$libc_cv_gcc___thread" = yes; then
+
+$as_echo "#define HAVE___THREAD 1" >>confdefs.h
+
+  fi
+else
+  libc_cv_gcc___thread=no
+fi
+  if test x$libc_cv_gcc___thread = xno; then :
+
+    { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "UNW_CACHE_PER_THREAD requires __thread
+See \`config.log' for more details" "$LINENO" 5; }
+
+fi
+
+fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for Intel compiler" >&5
+$as_echo_n "checking for Intel compiler... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+#ifndef __INTEL_COMPILER
+#error choke me
+#endif
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  intel_compiler=yes
+else
+  intel_compiler=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+
+if test x$GCC = xyes -a x$intel_compiler != xyes; then
+  CFLAGS="${CFLAGS} -fexceptions -Wall -Wsign-compare"
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $intel_compiler" >&5
+$as_echo "$intel_compiler" >&6; }
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for QCC compiler" >&5
+$as_echo_n "checking for QCC compiler... " >&6; }
+case $CC in #(
+  qcc*|QCC*) :
+    qcc_compiler=yes ;; #(
+  *) :
+    qcc_compiler=no ;;
+esac
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $qcc_compiler" >&5
+$as_echo "$qcc_compiler" >&6; }
+
+if test x$intel_compiler = xyes; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if linker supports -static-libcxa" >&5
+$as_echo_n "checking if linker supports -static-libcxa... " >&6; }
+  save_LDFLAGS="$LDFLAGS"
+  LDFLAGS="$LDFLAGS -static-libcxa"
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  have_static_libcxa=yes
+else
+  have_static_libcxa=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+  LDFLAGS="$save_LDFLAGS"
+  if test "x$have_static_libcxa" = xyes; then
+    LDFLAGS_STATIC_LIBCXA="-XCClinker -static-libcxa"
+  fi
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $have_static_libcxa" >&5
+$as_echo "$have_static_libcxa" >&6; }
+fi
+
+if test x$qcc_compiler = xyes; then
+    LDFLAGS_NOSTARTFILES="-XCClinker -Wc,-nostartfiles"
+else
+    LDFLAGS_NOSTARTFILES="-XCClinker -nostartfiles"
+fi
+
+if test x$GCC = xyes -a x$intel_compiler != xyes -a x$qcc_compiler != xyes -a x$android != xyes; then
+  LIBCRTS="-lgcc_s"
+fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for __builtin___clear_cache" >&5
+$as_echo_n "checking for __builtin___clear_cache... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+__builtin___clear_cache(0, 0)
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  have__builtin___clear_cache=yes
+else
+  have__builtin___clear_cache=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+if test x$have__builtin___clear_cache = xyes; then
+
+$as_echo "#define HAVE__BUILTIN___CLEAR_CACHE 1" >>confdefs.h
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $have__builtin___clear_cache" >&5
+$as_echo "$have__builtin___clear_cache" >&6; }
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for __builtin_unreachable" >&5
+$as_echo_n "checking for __builtin_unreachable... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+__builtin_unreachable()
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  have__builtin_unreachable=yes
+else
+  have__builtin_unreachable=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+if test x$have__builtin_unreachable = xyes; then
+
+$as_echo "#define HAVE__BUILTIN_UNREACHABLE 1" >>confdefs.h
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $have__builtin_unreachable" >&5
+$as_echo "$have__builtin_unreachable" >&6; }
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for __sync atomics" >&5
+$as_echo_n "checking for __sync atomics... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+    __sync_bool_compare_and_swap((int *)0, 0, 1);
+    __sync_fetch_and_add((int *)0, 1);
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  have_sync_atomics=yes
+else
+  have_sync_atomics=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+if test x$have_sync_atomics = xyes; then
+
+$as_echo "#define HAVE_SYNC_ATOMICS 1" >>confdefs.h
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $have_sync_atomics" >&5
+$as_echo "$have_sync_atomics" >&6; }
+
+CCASFLAGS="${CCASFLAGS} ${CPPFLAGS}"
+
+arch="$target_arch"
+ARCH=`echo $target_arch | tr a-z A-Z`
+
+PKG_MAJOR=1
+PKG_MINOR=4
+PKG_EXTRA=-rc1
+PKG_MAINTAINER=libunwind-devel@nongnu.org
+
+old_LIBS="$LIBS"
+LIBS=""
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing backtrace" >&5
+$as_echo_n "checking for library containing backtrace... " >&6; }
+if ${ac_cv_search_backtrace+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_func_search_save_LIBS=$LIBS
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char backtrace ();
+int
+main ()
+{
+return backtrace ();
+  ;
+  return 0;
+}
+_ACEOF
+for ac_lib in '' execinfo; do
+  if test -z "$ac_lib"; then
+    ac_res="none required"
+  else
+    ac_res=-l$ac_lib
+    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+  fi
+  if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_search_backtrace=$ac_res
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext
+  if ${ac_cv_search_backtrace+:} false; then :
+  break
+fi
+done
+if ${ac_cv_search_backtrace+:} false; then :
+
+else
+  ac_cv_search_backtrace=no
+fi
+rm conftest.$ac_ext
+LIBS=$ac_func_search_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_backtrace" >&5
+$as_echo "$ac_cv_search_backtrace" >&6; }
+ac_res=$ac_cv_search_backtrace
+if test "$ac_res" != no; then :
+  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
+
+fi
+
+LIBS="$old_LIBS"
+case "$ac_cv_search_backtrace" in
+  -l*) BACKTRACELIB=$ac_cv_search_backtrace;;
+  *) BACKTRACELIB="";;
+esac
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+# Extract the first word of "latex2man", so it can be a program name with args.
+set dummy latex2man; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_LATEX2MAN+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $LATEX2MAN in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_LATEX2MAN="$LATEX2MAN" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_LATEX2MAN="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+LATEX2MAN=$ac_cv_path_LATEX2MAN
+if test -n "$LATEX2MAN"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LATEX2MAN" >&5
+$as_echo "$LATEX2MAN" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+if test "x$LATEX2MAN" = "x"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: latex2man not found. Install latex2man. Disabling docs." >&5
+$as_echo "$as_me: WARNING: latex2man not found. Install latex2man. Disabling docs." >&2;}
+  enable_documentation="no";
+fi
+
+ if test x$enable_documentation = xyes; then
+  CONFIG_DOCS_TRUE=
+  CONFIG_DOCS_FALSE='#'
+else
+  CONFIG_DOCS_TRUE='#'
+  CONFIG_DOCS_FALSE=
+fi
+
+if test "x$enable_documentation" = "xyes"; then
+  ac_config_files="$ac_config_files doc/Makefile doc/common.tex"
+
+fi
+
+ if test x$enable_tests = xyes; then
+  CONFIG_TESTS_TRUE=
+  CONFIG_TESTS_FALSE='#'
+else
+  CONFIG_TESTS_TRUE='#'
+  CONFIG_TESTS_FALSE=
+fi
+
+if test "x$enable_tests" = "xyes"; then
+  ac_config_files="$ac_config_files tests/Makefile tests/check-namespace.sh"
+
+fi
+
+ac_config_files="$ac_config_files Makefile src/Makefile include/libunwind-common.h include/libunwind.h include/tdep/libunwind_i.h"
+
+ac_config_files="$ac_config_files src/unwind/libunwind.pc src/coredump/libunwind-coredump.pc src/ptrace/libunwind-ptrace.pc src/setjmp/libunwind-setjmp.pc src/libunwind-generic.pc"
+
+cat >confcache <<\_ACEOF
+# This file is a shell script that caches the results of configure
+# tests run on this system so they can be shared between configure
+# scripts and configure runs, see configure's option --config-cache.
+# It is not useful on other systems.  If it contains results you don't
+# want to keep, you may remove or edit it.
+#
+# config.status only pays attention to the cache file if you give it
+# the --recheck option to rerun configure.
+#
+# `ac_cv_env_foo' variables (set or unset) will be overridden when
+# loading this file, other *unset* `ac_cv_foo' will be assigned the
+# following values.
+
+_ACEOF
+
+# The following way of writing the cache mishandles newlines in values,
+# but we know of no workaround that is simple, portable, and efficient.
+# So, we kill variables containing newlines.
+# Ultrix sh set writes to stderr and can't be redirected directly,
+# and sets the high bit in the cache file unless we assign to the vars.
+(
+  for ac_var in `(set) 2>&1 | sed -n 's/^\([a-zA-Z_][a-zA-Z0-9_]*\)=.*/\1/p'`; do
+    eval ac_val=\$$ac_var
+    case $ac_val in #(
+    *${as_nl}*)
+      case $ac_var in #(
+      *_cv_*) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: cache variable $ac_var contains a newline" >&5
+$as_echo "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;} ;;
+      esac
+      case $ac_var in #(
+      _ | IFS | as_nl) ;; #(
+      BASH_ARGV | BASH_SOURCE) eval $ac_var= ;; #(
+      *) { eval $ac_var=; unset $ac_var;} ;;
+      esac ;;
+    esac
+  done
+
+  (set) 2>&1 |
+    case $as_nl`(ac_space=' '; set) 2>&1` in #(
+    *${as_nl}ac_space=\ *)
+      # `set' does not quote correctly, so add quotes: double-quote
+      # substitution turns \\\\ into \\, and sed turns \\ into \.
+      sed -n \
+	"s/'/'\\\\''/g;
+	  s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1='\\2'/p"
+      ;; #(
+    *)
+      # `set' quotes correctly as required by POSIX, so do not add quotes.
+      sed -n "/^[_$as_cr_alnum]*_cv_[_$as_cr_alnum]*=/p"
+      ;;
+    esac |
+    sort
+) |
+  sed '
+     /^ac_cv_env_/b end
+     t clear
+     :clear
+     s/^\([^=]*\)=\(.*[{}].*\)$/test "${\1+set}" = set || &/
+     t end
+     s/^\([^=]*\)=\(.*\)$/\1=${\1=\2}/
+     :end' >>confcache
+if diff "$cache_file" confcache >/dev/null 2>&1; then :; else
+  if test -w "$cache_file"; then
+    if test "x$cache_file" != "x/dev/null"; then
+      { $as_echo "$as_me:${as_lineno-$LINENO}: updating cache $cache_file" >&5
+$as_echo "$as_me: updating cache $cache_file" >&6;}
+      if test ! -f "$cache_file" || test -h "$cache_file"; then
+	cat confcache >"$cache_file"
+      else
+        case $cache_file in #(
+        */* | ?:*)
+	  mv -f confcache "$cache_file"$$ &&
+	  mv -f "$cache_file"$$ "$cache_file" ;; #(
+        *)
+	  mv -f confcache "$cache_file" ;;
+	esac
+      fi
+    fi
+  else
+    { $as_echo "$as_me:${as_lineno-$LINENO}: not updating unwritable cache $cache_file" >&5
+$as_echo "$as_me: not updating unwritable cache $cache_file" >&6;}
+  fi
+fi
+rm -f confcache
+
+test "x$prefix" = xNONE && prefix=$ac_default_prefix
+# Let make expand exec_prefix.
+test "x$exec_prefix" = xNONE && exec_prefix='${prefix}'
+
+DEFS=-DHAVE_CONFIG_H
+
+ac_libobjs=
+ac_ltlibobjs=
+U=
+for ac_i in : $LIBOBJS; do test "x$ac_i" = x: && continue
+  # 1. Remove the extension, and $U if already installed.
+  ac_script='s/\$U\././;s/\.o$//;s/\.obj$//'
+  ac_i=`$as_echo "$ac_i" | sed "$ac_script"`
+  # 2. Prepend LIBOBJDIR.  When used with automake>=1.10 LIBOBJDIR
+  #    will be set to the directory where LIBOBJS objects are built.
+  as_fn_append ac_libobjs " \${LIBOBJDIR}$ac_i\$U.$ac_objext"
+  as_fn_append ac_ltlibobjs " \${LIBOBJDIR}$ac_i"'$U.lo'
+done
+LIBOBJS=$ac_libobjs
+
+LTLIBOBJS=$ac_ltlibobjs
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking that generated files are newer than configure" >&5
+$as_echo_n "checking that generated files are newer than configure... " >&6; }
+   if test -n "$am_sleep_pid"; then
+     # Hide warnings about reused PIDs.
+     wait $am_sleep_pid 2>/dev/null
+   fi
+   { $as_echo "$as_me:${as_lineno-$LINENO}: result: done" >&5
+$as_echo "done" >&6; }
+ if test -n "$EXEEXT"; then
+  am__EXEEXT_TRUE=
+  am__EXEEXT_FALSE='#'
+else
+  am__EXEEXT_TRUE='#'
+  am__EXEEXT_FALSE=
+fi
+
+if test -z "${MAINTAINER_MODE_TRUE}" && test -z "${MAINTAINER_MODE_FALSE}"; then
+  as_fn_error $? "conditional \"MAINTAINER_MODE\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${AMDEP_TRUE}" && test -z "${AMDEP_FALSE}"; then
+  as_fn_error $? "conditional \"AMDEP\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${am__fastdepCC_TRUE}" && test -z "${am__fastdepCC_FALSE}"; then
+  as_fn_error $? "conditional \"am__fastdepCC\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${am__fastdepCXX_TRUE}" && test -z "${am__fastdepCXX_FALSE}"; then
+  as_fn_error $? "conditional \"am__fastdepCXX\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${am__fastdepCCAS_TRUE}" && test -z "${am__fastdepCCAS_FALSE}"; then
+  as_fn_error $? "conditional \"am__fastdepCCAS\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${USE_ALTIVEC_TRUE}" && test -z "${USE_ALTIVEC_FALSE}"; then
+  as_fn_error $? "conditional \"USE_ALTIVEC\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${BUILD_COREDUMP_TRUE}" && test -z "${BUILD_COREDUMP_FALSE}"; then
+  as_fn_error $? "conditional \"BUILD_COREDUMP\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${BUILD_PTRACE_TRUE}" && test -z "${BUILD_PTRACE_FALSE}"; then
+  as_fn_error $? "conditional \"BUILD_PTRACE\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${BUILD_SETJMP_TRUE}" && test -z "${BUILD_SETJMP_FALSE}"; then
+  as_fn_error $? "conditional \"BUILD_SETJMP\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${NO_PTRACE_TEST_TRUE}" && test -z "${NO_PTRACE_TEST_FALSE}"; then
+  as_fn_error $? "conditional \"NO_PTRACE_TEST\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${REMOTE_ONLY_TRUE}" && test -z "${REMOTE_ONLY_FALSE}"; then
+  as_fn_error $? "conditional \"REMOTE_ONLY\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${ARCH_AARCH64_TRUE}" && test -z "${ARCH_AARCH64_FALSE}"; then
+  as_fn_error $? "conditional \"ARCH_AARCH64\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${ARCH_ARM_TRUE}" && test -z "${ARCH_ARM_FALSE}"; then
+  as_fn_error $? "conditional \"ARCH_ARM\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${ARCH_IA64_TRUE}" && test -z "${ARCH_IA64_FALSE}"; then
+  as_fn_error $? "conditional \"ARCH_IA64\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${ARCH_HPPA_TRUE}" && test -z "${ARCH_HPPA_FALSE}"; then
+  as_fn_error $? "conditional \"ARCH_HPPA\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${ARCH_MIPS_TRUE}" && test -z "${ARCH_MIPS_FALSE}"; then
+  as_fn_error $? "conditional \"ARCH_MIPS\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${ARCH_X86_TRUE}" && test -z "${ARCH_X86_FALSE}"; then
+  as_fn_error $? "conditional \"ARCH_X86\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${ARCH_X86_64_TRUE}" && test -z "${ARCH_X86_64_FALSE}"; then
+  as_fn_error $? "conditional \"ARCH_X86_64\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${ARCH_PPC32_TRUE}" && test -z "${ARCH_PPC32_FALSE}"; then
+  as_fn_error $? "conditional \"ARCH_PPC32\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${ARCH_PPC64_TRUE}" && test -z "${ARCH_PPC64_FALSE}"; then
+  as_fn_error $? "conditional \"ARCH_PPC64\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${ARCH_SH_TRUE}" && test -z "${ARCH_SH_FALSE}"; then
+  as_fn_error $? "conditional \"ARCH_SH\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${ARCH_TILEGX_TRUE}" && test -z "${ARCH_TILEGX_FALSE}"; then
+  as_fn_error $? "conditional \"ARCH_TILEGX\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${ARCH_S390X_TRUE}" && test -z "${ARCH_S390X_FALSE}"; then
+  as_fn_error $? "conditional \"ARCH_S390X\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${OS_LINUX_TRUE}" && test -z "${OS_LINUX_FALSE}"; then
+  as_fn_error $? "conditional \"OS_LINUX\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${OS_HPUX_TRUE}" && test -z "${OS_HPUX_FALSE}"; then
+  as_fn_error $? "conditional \"OS_HPUX\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${OS_FREEBSD_TRUE}" && test -z "${OS_FREEBSD_FALSE}"; then
+  as_fn_error $? "conditional \"OS_FREEBSD\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${OS_QNX_TRUE}" && test -z "${OS_QNX_FALSE}"; then
+  as_fn_error $? "conditional \"OS_QNX\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${USE_ELF32_TRUE}" && test -z "${USE_ELF32_FALSE}"; then
+  as_fn_error $? "conditional \"USE_ELF32\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${USE_ELF64_TRUE}" && test -z "${USE_ELF64_FALSE}"; then
+  as_fn_error $? "conditional \"USE_ELF64\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${USE_ELFXX_TRUE}" && test -z "${USE_ELFXX_FALSE}"; then
+  as_fn_error $? "conditional \"USE_ELFXX\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${USE_DWARF_TRUE}" && test -z "${USE_DWARF_FALSE}"; then
+  as_fn_error $? "conditional \"USE_DWARF\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${SUPPORT_CXX_EXCEPTIONS_TRUE}" && test -z "${SUPPORT_CXX_EXCEPTIONS_FALSE}"; then
+  as_fn_error $? "conditional \"SUPPORT_CXX_EXCEPTIONS\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${HAVE_LZMA_TRUE}" && test -z "${HAVE_LZMA_FALSE}"; then
+  as_fn_error $? "conditional \"HAVE_LZMA\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${CONFIG_DOCS_TRUE}" && test -z "${CONFIG_DOCS_FALSE}"; then
+  as_fn_error $? "conditional \"CONFIG_DOCS\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${CONFIG_TESTS_TRUE}" && test -z "${CONFIG_TESTS_FALSE}"; then
+  as_fn_error $? "conditional \"CONFIG_TESTS\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+
+: "${CONFIG_STATUS=./config.status}"
+ac_write_fail=0
+ac_clean_files_save=$ac_clean_files
+ac_clean_files="$ac_clean_files $CONFIG_STATUS"
+{ $as_echo "$as_me:${as_lineno-$LINENO}: creating $CONFIG_STATUS" >&5
+$as_echo "$as_me: creating $CONFIG_STATUS" >&6;}
+as_write_fail=0
+cat >$CONFIG_STATUS <<_ASEOF || as_write_fail=1
+#! $SHELL
+# Generated by $as_me.
+# Run this file to recreate the current configuration.
+# Compiler output produced by configure, useful for debugging
+# configure, is in config.log if it exists.
+
+debug=false
+ac_cs_recheck=false
+ac_cs_silent=false
+
+SHELL=\${CONFIG_SHELL-$SHELL}
+export SHELL
+_ASEOF
+cat >>$CONFIG_STATUS <<\_ASEOF || as_write_fail=1
+## -------------------- ##
+## M4sh Initialization. ##
+## -------------------- ##
+
+# Be more Bourne compatible
+DUALCASE=1; export DUALCASE # for MKS sh
+if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then :
+  emulate sh
+  NULLCMD=:
+  # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which
+  # is contrary to our usage.  Disable this feature.
+  alias -g '${1+"$@"}'='"$@"'
+  setopt NO_GLOB_SUBST
+else
+  case `(set -o) 2>/dev/null` in #(
+  *posix*) :
+    set -o posix ;; #(
+  *) :
+     ;;
+esac
+fi
+
+
+as_nl='
+'
+export as_nl
+# Printing a long string crashes Solaris 7 /usr/bin/printf.
+as_echo='\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'
+as_echo=$as_echo$as_echo$as_echo$as_echo$as_echo
+as_echo=$as_echo$as_echo$as_echo$as_echo$as_echo$as_echo
+# Prefer a ksh shell builtin over an external printf program on Solaris,
+# but without wasting forks for bash or zsh.
+if test -z "$BASH_VERSION$ZSH_VERSION" \
+    && (test "X`print -r -- $as_echo`" = "X$as_echo") 2>/dev/null; then
+  as_echo='print -r --'
+  as_echo_n='print -rn --'
+elif (test "X`printf %s $as_echo`" = "X$as_echo") 2>/dev/null; then
+  as_echo='printf %s\n'
+  as_echo_n='printf %s'
+else
+  if test "X`(/usr/ucb/echo -n -n $as_echo) 2>/dev/null`" = "X-n $as_echo"; then
+    as_echo_body='eval /usr/ucb/echo -n "$1$as_nl"'
+    as_echo_n='/usr/ucb/echo -n'
+  else
+    as_echo_body='eval expr "X$1" : "X\\(.*\\)"'
+    as_echo_n_body='eval
+      arg=$1;
+      case $arg in #(
+      *"$as_nl"*)
+	expr "X$arg" : "X\\(.*\\)$as_nl";
+	arg=`expr "X$arg" : ".*$as_nl\\(.*\\)"`;;
+      esac;
+      expr "X$arg" : "X\\(.*\\)" | tr -d "$as_nl"
+    '
+    export as_echo_n_body
+    as_echo_n='sh -c $as_echo_n_body as_echo'
+  fi
+  export as_echo_body
+  as_echo='sh -c $as_echo_body as_echo'
+fi
+
+# The user is always right.
+if test "${PATH_SEPARATOR+set}" != set; then
+  PATH_SEPARATOR=:
+  (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 && {
+    (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 ||
+      PATH_SEPARATOR=';'
+  }
+fi
+
+
+# IFS
+# We need space, tab and new line, in precisely that order.  Quoting is
+# there to prevent editors from complaining about space-tab.
+# (If _AS_PATH_WALK were called with IFS unset, it would disable word
+# splitting by setting IFS to empty value.)
+IFS=" ""	$as_nl"
+
+# Find who we are.  Look in the path if we contain no directory separator.
+as_myself=
+case $0 in #((
+  *[\\/]* ) as_myself=$0 ;;
+  *) as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    test -r "$as_dir/$0" && as_myself=$as_dir/$0 && break
+  done
+IFS=$as_save_IFS
+
+     ;;
+esac
+# We did not find ourselves, most probably we were run as `sh COMMAND'
+# in which case we are not to be found in the path.
+if test "x$as_myself" = x; then
+  as_myself=$0
+fi
+if test ! -f "$as_myself"; then
+  $as_echo "$as_myself: error: cannot find myself; rerun with an absolute file name" >&2
+  exit 1
+fi
+
+# Unset variables that we do not need and which cause bugs (e.g. in
+# pre-3.0 UWIN ksh).  But do not cause bugs in bash 2.01; the "|| exit 1"
+# suppresses any "Segmentation fault" message there.  '((' could
+# trigger a bug in pdksh 5.2.14.
+for as_var in BASH_ENV ENV MAIL MAILPATH
+do eval test x\${$as_var+set} = xset \
+  && ( (unset $as_var) || exit 1) >/dev/null 2>&1 && unset $as_var || :
+done
+PS1='$ '
+PS2='> '
+PS4='+ '
+
+# NLS nuisances.
+LC_ALL=C
+export LC_ALL
+LANGUAGE=C
+export LANGUAGE
+
+# CDPATH.
+(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
+
+
+# as_fn_error STATUS ERROR [LINENO LOG_FD]
+# ----------------------------------------
+# Output "`basename $0`: error: ERROR" to stderr. If LINENO and LOG_FD are
+# provided, also output the error to LOG_FD, referencing LINENO. Then exit the
+# script with STATUS, using 1 if that was 0.
+as_fn_error ()
+{
+  as_status=$1; test $as_status -eq 0 && as_status=1
+  if test "$4"; then
+    as_lineno=${as_lineno-"$3"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+    $as_echo "$as_me:${as_lineno-$LINENO}: error: $2" >&$4
+  fi
+  $as_echo "$as_me: error: $2" >&2
+  as_fn_exit $as_status
+} # as_fn_error
+
+
+# as_fn_set_status STATUS
+# -----------------------
+# Set $? to STATUS, without forking.
+as_fn_set_status ()
+{
+  return $1
+} # as_fn_set_status
+
+# as_fn_exit STATUS
+# -----------------
+# Exit the shell with STATUS, even in a "trap 0" or "set -e" context.
+as_fn_exit ()
+{
+  set +e
+  as_fn_set_status $1
+  exit $1
+} # as_fn_exit
+
+# as_fn_unset VAR
+# ---------------
+# Portably unset VAR.
+as_fn_unset ()
+{
+  { eval $1=; unset $1;}
+}
+as_unset=as_fn_unset
+# as_fn_append VAR VALUE
+# ----------------------
+# Append the text in VALUE to the end of the definition contained in VAR. Take
+# advantage of any shell optimizations that allow amortized linear growth over
+# repeated appends, instead of the typical quadratic growth present in naive
+# implementations.
+if (eval "as_var=1; as_var+=2; test x\$as_var = x12") 2>/dev/null; then :
+  eval 'as_fn_append ()
+  {
+    eval $1+=\$2
+  }'
+else
+  as_fn_append ()
+  {
+    eval $1=\$$1\$2
+  }
+fi # as_fn_append
+
+# as_fn_arith ARG...
+# ------------------
+# Perform arithmetic evaluation on the ARGs, and store the result in the
+# global $as_val. Take advantage of shells that can avoid forks. The arguments
+# must be portable across $(()) and expr.
+if (eval "test \$(( 1 + 1 )) = 2") 2>/dev/null; then :
+  eval 'as_fn_arith ()
+  {
+    as_val=$(( $* ))
+  }'
+else
+  as_fn_arith ()
+  {
+    as_val=`expr "$@" || test $? -eq 1`
+  }
+fi # as_fn_arith
+
+
+if expr a : '\(a\)' >/dev/null 2>&1 &&
+   test "X`expr 00001 : '.*\(...\)'`" = X001; then
+  as_expr=expr
+else
+  as_expr=false
+fi
+
+if (basename -- /) >/dev/null 2>&1 && test "X`basename -- / 2>&1`" = "X/"; then
+  as_basename=basename
+else
+  as_basename=false
+fi
+
+if (as_dir=`dirname -- /` && test "X$as_dir" = X/) >/dev/null 2>&1; then
+  as_dirname=dirname
+else
+  as_dirname=false
+fi
+
+as_me=`$as_basename -- "$0" ||
+$as_expr X/"$0" : '.*/\([^/][^/]*\)/*$' \| \
+	 X"$0" : 'X\(//\)$' \| \
+	 X"$0" : 'X\(/\)' \| . 2>/dev/null ||
+$as_echo X/"$0" |
+    sed '/^.*\/\([^/][^/]*\)\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\/\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\/\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+
+# Avoid depending upon Character Ranges.
+as_cr_letters='abcdefghijklmnopqrstuvwxyz'
+as_cr_LETTERS='ABCDEFGHIJKLMNOPQRSTUVWXYZ'
+as_cr_Letters=$as_cr_letters$as_cr_LETTERS
+as_cr_digits='0123456789'
+as_cr_alnum=$as_cr_Letters$as_cr_digits
+
+ECHO_C= ECHO_N= ECHO_T=
+case `echo -n x` in #(((((
+-n*)
+  case `echo 'xy\c'` in
+  *c*) ECHO_T='	';;	# ECHO_T is single tab character.
+  xy)  ECHO_C='\c';;
+  *)   echo `echo ksh88 bug on AIX 6.1` > /dev/null
+       ECHO_T='	';;
+  esac;;
+*)
+  ECHO_N='-n';;
+esac
+
+rm -f conf$$ conf$$.exe conf$$.file
+if test -d conf$$.dir; then
+  rm -f conf$$.dir/conf$$.file
+else
+  rm -f conf$$.dir
+  mkdir conf$$.dir 2>/dev/null
+fi
+if (echo >conf$$.file) 2>/dev/null; then
+  if ln -s conf$$.file conf$$ 2>/dev/null; then
+    as_ln_s='ln -s'
+    # ... but there are two gotchas:
+    # 1) On MSYS, both `ln -s file dir' and `ln file dir' fail.
+    # 2) DJGPP < 2.04 has no symlinks; `ln -s' creates a wrapper executable.
+    # In both cases, we have to default to `cp -pR'.
+    ln -s conf$$.file conf$$.dir 2>/dev/null && test ! -f conf$$.exe ||
+      as_ln_s='cp -pR'
+  elif ln conf$$.file conf$$ 2>/dev/null; then
+    as_ln_s=ln
+  else
+    as_ln_s='cp -pR'
+  fi
+else
+  as_ln_s='cp -pR'
+fi
+rm -f conf$$ conf$$.exe conf$$.dir/conf$$.file conf$$.file
+rmdir conf$$.dir 2>/dev/null
+
+
+# as_fn_mkdir_p
+# -------------
+# Create "$as_dir" as a directory, including parents if necessary.
+as_fn_mkdir_p ()
+{
+
+  case $as_dir in #(
+  -*) as_dir=./$as_dir;;
+  esac
+  test -d "$as_dir" || eval $as_mkdir_p || {
+    as_dirs=
+    while :; do
+      case $as_dir in #(
+      *\'*) as_qdir=`$as_echo "$as_dir" | sed "s/'/'\\\\\\\\''/g"`;; #'(
+      *) as_qdir=$as_dir;;
+      esac
+      as_dirs="'$as_qdir' $as_dirs"
+      as_dir=`$as_dirname -- "$as_dir" ||
+$as_expr X"$as_dir" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	 X"$as_dir" : 'X\(//\)[^/]' \| \
+	 X"$as_dir" : 'X\(//\)$' \| \
+	 X"$as_dir" : 'X\(/\)' \| . 2>/dev/null ||
+$as_echo X"$as_dir" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)[^/].*/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+      test -d "$as_dir" && break
+    done
+    test -z "$as_dirs" || eval "mkdir $as_dirs"
+  } || test -d "$as_dir" || as_fn_error $? "cannot create directory $as_dir"
+
+
+} # as_fn_mkdir_p
+if mkdir -p . 2>/dev/null; then
+  as_mkdir_p='mkdir -p "$as_dir"'
+else
+  test -d ./-p && rmdir ./-p
+  as_mkdir_p=false
+fi
+
+
+# as_fn_executable_p FILE
+# -----------------------
+# Test if FILE is an executable regular file.
+as_fn_executable_p ()
+{
+  test -f "$1" && test -x "$1"
+} # as_fn_executable_p
+as_test_x='test -x'
+as_executable_p=as_fn_executable_p
+
+# Sed expression to map a string onto a valid CPP name.
+as_tr_cpp="eval sed 'y%*$as_cr_letters%P$as_cr_LETTERS%;s%[^_$as_cr_alnum]%_%g'"
+
+# Sed expression to map a string onto a valid variable name.
+as_tr_sh="eval sed 'y%*+%pp%;s%[^_$as_cr_alnum]%_%g'"
+
+
+exec 6>&1
+## ----------------------------------- ##
+## Main body of $CONFIG_STATUS script. ##
+## ----------------------------------- ##
+_ASEOF
+test $as_write_fail = 0 && chmod +x $CONFIG_STATUS || ac_write_fail=1
+
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+# Save the log message, to keep $0 and so on meaningful, and to
+# report actual input values of CONFIG_FILES etc. instead of their
+# values after options handling.
+ac_log="
+This file was extended by libunwind $as_me 1.4-rc1, which was
+generated by GNU Autoconf 2.69.  Invocation command line was
+
+  CONFIG_FILES    = $CONFIG_FILES
+  CONFIG_HEADERS  = $CONFIG_HEADERS
+  CONFIG_LINKS    = $CONFIG_LINKS
+  CONFIG_COMMANDS = $CONFIG_COMMANDS
+  $ $0 $@
+
+on `(hostname || uname -n) 2>/dev/null | sed 1q`
+"
+
+_ACEOF
+
+case $ac_config_files in *"
+"*) set x $ac_config_files; shift; ac_config_files=$*;;
+esac
+
+case $ac_config_headers in *"
+"*) set x $ac_config_headers; shift; ac_config_headers=$*;;
+esac
+
+
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+# Files that config.status was made for.
+config_files="$ac_config_files"
+config_headers="$ac_config_headers"
+config_commands="$ac_config_commands"
+
+_ACEOF
+
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+ac_cs_usage="\
+\`$as_me' instantiates files and other configuration actions
+from templates according to the current configuration.  Unless the files
+and actions are specified as TAGs, all are instantiated by default.
+
+Usage: $0 [OPTION]... [TAG]...
+
+  -h, --help       print this help, then exit
+  -V, --version    print version number and configuration settings, then exit
+      --config     print configuration, then exit
+  -q, --quiet, --silent
+                   do not print progress messages
+  -d, --debug      don't remove temporary files
+      --recheck    update $as_me by reconfiguring in the same conditions
+      --file=FILE[:TEMPLATE]
+                   instantiate the configuration file FILE
+      --header=FILE[:TEMPLATE]
+                   instantiate the configuration header FILE
+
+Configuration files:
+$config_files
+
+Configuration headers:
+$config_headers
+
+Configuration commands:
+$config_commands
+
+Report bugs to <libunwind-devel@nongnu.org>."
+
+_ACEOF
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
+ac_cs_version="\\
+libunwind config.status 1.4-rc1
+configured by $0, generated by GNU Autoconf 2.69,
+  with options \\"\$ac_cs_config\\"
+
+Copyright (C) 2012 Free Software Foundation, Inc.
+This config.status script is free software; the Free Software Foundation
+gives unlimited permission to copy, distribute and modify it."
+
+ac_pwd='$ac_pwd'
+srcdir='$srcdir'
+INSTALL='$INSTALL'
+MKDIR_P='$MKDIR_P'
+AWK='$AWK'
+test -n "\$AWK" || AWK=awk
+_ACEOF
+
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+# The default lists apply if the user does not specify any file.
+ac_need_defaults=:
+while test $# != 0
+do
+  case $1 in
+  --*=?*)
+    ac_option=`expr "X$1" : 'X\([^=]*\)='`
+    ac_optarg=`expr "X$1" : 'X[^=]*=\(.*\)'`
+    ac_shift=:
+    ;;
+  --*=)
+    ac_option=`expr "X$1" : 'X\([^=]*\)='`
+    ac_optarg=
+    ac_shift=:
+    ;;
+  *)
+    ac_option=$1
+    ac_optarg=$2
+    ac_shift=shift
+    ;;
+  esac
+
+  case $ac_option in
+  # Handling of the options.
+  -recheck | --recheck | --rechec | --reche | --rech | --rec | --re | --r)
+    ac_cs_recheck=: ;;
+  --version | --versio | --versi | --vers | --ver | --ve | --v | -V )
+    $as_echo "$ac_cs_version"; exit ;;
+  --config | --confi | --conf | --con | --co | --c )
+    $as_echo "$ac_cs_config"; exit ;;
+  --debug | --debu | --deb | --de | --d | -d )
+    debug=: ;;
+  --file | --fil | --fi | --f )
+    $ac_shift
+    case $ac_optarg in
+    *\'*) ac_optarg=`$as_echo "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"` ;;
+    '') as_fn_error $? "missing file argument" ;;
+    esac
+    as_fn_append CONFIG_FILES " '$ac_optarg'"
+    ac_need_defaults=false;;
+  --header | --heade | --head | --hea )
+    $ac_shift
+    case $ac_optarg in
+    *\'*) ac_optarg=`$as_echo "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"` ;;
+    esac
+    as_fn_append CONFIG_HEADERS " '$ac_optarg'"
+    ac_need_defaults=false;;
+  --he | --h)
+    # Conflict between --help and --header
+    as_fn_error $? "ambiguous option: \`$1'
+Try \`$0 --help' for more information.";;
+  --help | --hel | -h )
+    $as_echo "$ac_cs_usage"; exit ;;
+  -q | -quiet | --quiet | --quie | --qui | --qu | --q \
+  | -silent | --silent | --silen | --sile | --sil | --si | --s)
+    ac_cs_silent=: ;;
+
+  # This is an error.
+  -*) as_fn_error $? "unrecognized option: \`$1'
+Try \`$0 --help' for more information." ;;
+
+  *) as_fn_append ac_config_targets " $1"
+     ac_need_defaults=false ;;
+
+  esac
+  shift
+done
+
+ac_configure_extra_args=
+
+if $ac_cs_silent; then
+  exec 6>/dev/null
+  ac_configure_extra_args="$ac_configure_extra_args --silent"
+fi
+
+_ACEOF
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+if \$ac_cs_recheck; then
+  set X $SHELL '$0' $ac_configure_args \$ac_configure_extra_args --no-create --no-recursion
+  shift
+  \$as_echo "running CONFIG_SHELL=$SHELL \$*" >&6
+  CONFIG_SHELL='$SHELL'
+  export CONFIG_SHELL
+  exec "\$@"
+fi
+
+_ACEOF
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+exec 5>>config.log
+{
+  echo
+  sed 'h;s/./-/g;s/^.../## /;s/...$/ ##/;p;x;p;x' <<_ASBOX
+## Running $as_me. ##
+_ASBOX
+  $as_echo "$ac_log"
+} >&5
+
+_ACEOF
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+#
+# INIT-COMMANDS
+#
+AMDEP_TRUE="$AMDEP_TRUE" ac_aux_dir="$ac_aux_dir"
+
+
+# The HP-UX ksh and POSIX shell print the target directory to stdout
+# if CDPATH is set.
+(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
+
+sed_quote_subst='$sed_quote_subst'
+double_quote_subst='$double_quote_subst'
+delay_variable_subst='$delay_variable_subst'
+macro_version='`$ECHO "$macro_version" | $SED "$delay_single_quote_subst"`'
+macro_revision='`$ECHO "$macro_revision" | $SED "$delay_single_quote_subst"`'
+enable_shared='`$ECHO "$enable_shared" | $SED "$delay_single_quote_subst"`'
+enable_static='`$ECHO "$enable_static" | $SED "$delay_single_quote_subst"`'
+pic_mode='`$ECHO "$pic_mode" | $SED "$delay_single_quote_subst"`'
+enable_fast_install='`$ECHO "$enable_fast_install" | $SED "$delay_single_quote_subst"`'
+shared_archive_member_spec='`$ECHO "$shared_archive_member_spec" | $SED "$delay_single_quote_subst"`'
+SHELL='`$ECHO "$SHELL" | $SED "$delay_single_quote_subst"`'
+ECHO='`$ECHO "$ECHO" | $SED "$delay_single_quote_subst"`'
+PATH_SEPARATOR='`$ECHO "$PATH_SEPARATOR" | $SED "$delay_single_quote_subst"`'
+host_alias='`$ECHO "$host_alias" | $SED "$delay_single_quote_subst"`'
+host='`$ECHO "$host" | $SED "$delay_single_quote_subst"`'
+host_os='`$ECHO "$host_os" | $SED "$delay_single_quote_subst"`'
+build_alias='`$ECHO "$build_alias" | $SED "$delay_single_quote_subst"`'
+build='`$ECHO "$build" | $SED "$delay_single_quote_subst"`'
+build_os='`$ECHO "$build_os" | $SED "$delay_single_quote_subst"`'
+SED='`$ECHO "$SED" | $SED "$delay_single_quote_subst"`'
+Xsed='`$ECHO "$Xsed" | $SED "$delay_single_quote_subst"`'
+GREP='`$ECHO "$GREP" | $SED "$delay_single_quote_subst"`'
+EGREP='`$ECHO "$EGREP" | $SED "$delay_single_quote_subst"`'
+FGREP='`$ECHO "$FGREP" | $SED "$delay_single_quote_subst"`'
+LD='`$ECHO "$LD" | $SED "$delay_single_quote_subst"`'
+NM='`$ECHO "$NM" | $SED "$delay_single_quote_subst"`'
+LN_S='`$ECHO "$LN_S" | $SED "$delay_single_quote_subst"`'
+max_cmd_len='`$ECHO "$max_cmd_len" | $SED "$delay_single_quote_subst"`'
+ac_objext='`$ECHO "$ac_objext" | $SED "$delay_single_quote_subst"`'
+exeext='`$ECHO "$exeext" | $SED "$delay_single_quote_subst"`'
+lt_unset='`$ECHO "$lt_unset" | $SED "$delay_single_quote_subst"`'
+lt_SP2NL='`$ECHO "$lt_SP2NL" | $SED "$delay_single_quote_subst"`'
+lt_NL2SP='`$ECHO "$lt_NL2SP" | $SED "$delay_single_quote_subst"`'
+lt_cv_to_host_file_cmd='`$ECHO "$lt_cv_to_host_file_cmd" | $SED "$delay_single_quote_subst"`'
+lt_cv_to_tool_file_cmd='`$ECHO "$lt_cv_to_tool_file_cmd" | $SED "$delay_single_quote_subst"`'
+reload_flag='`$ECHO "$reload_flag" | $SED "$delay_single_quote_subst"`'
+reload_cmds='`$ECHO "$reload_cmds" | $SED "$delay_single_quote_subst"`'
+OBJDUMP='`$ECHO "$OBJDUMP" | $SED "$delay_single_quote_subst"`'
+deplibs_check_method='`$ECHO "$deplibs_check_method" | $SED "$delay_single_quote_subst"`'
+file_magic_cmd='`$ECHO "$file_magic_cmd" | $SED "$delay_single_quote_subst"`'
+file_magic_glob='`$ECHO "$file_magic_glob" | $SED "$delay_single_quote_subst"`'
+want_nocaseglob='`$ECHO "$want_nocaseglob" | $SED "$delay_single_quote_subst"`'
+DLLTOOL='`$ECHO "$DLLTOOL" | $SED "$delay_single_quote_subst"`'
+sharedlib_from_linklib_cmd='`$ECHO "$sharedlib_from_linklib_cmd" | $SED "$delay_single_quote_subst"`'
+AR='`$ECHO "$AR" | $SED "$delay_single_quote_subst"`'
+AR_FLAGS='`$ECHO "$AR_FLAGS" | $SED "$delay_single_quote_subst"`'
+archiver_list_spec='`$ECHO "$archiver_list_spec" | $SED "$delay_single_quote_subst"`'
+STRIP='`$ECHO "$STRIP" | $SED "$delay_single_quote_subst"`'
+RANLIB='`$ECHO "$RANLIB" | $SED "$delay_single_quote_subst"`'
+old_postinstall_cmds='`$ECHO "$old_postinstall_cmds" | $SED "$delay_single_quote_subst"`'
+old_postuninstall_cmds='`$ECHO "$old_postuninstall_cmds" | $SED "$delay_single_quote_subst"`'
+old_archive_cmds='`$ECHO "$old_archive_cmds" | $SED "$delay_single_quote_subst"`'
+lock_old_archive_extraction='`$ECHO "$lock_old_archive_extraction" | $SED "$delay_single_quote_subst"`'
+CC='`$ECHO "$CC" | $SED "$delay_single_quote_subst"`'
+CFLAGS='`$ECHO "$CFLAGS" | $SED "$delay_single_quote_subst"`'
+compiler='`$ECHO "$compiler" | $SED "$delay_single_quote_subst"`'
+GCC='`$ECHO "$GCC" | $SED "$delay_single_quote_subst"`'
+lt_cv_sys_global_symbol_pipe='`$ECHO "$lt_cv_sys_global_symbol_pipe" | $SED "$delay_single_quote_subst"`'
+lt_cv_sys_global_symbol_to_cdecl='`$ECHO "$lt_cv_sys_global_symbol_to_cdecl" | $SED "$delay_single_quote_subst"`'
+lt_cv_sys_global_symbol_to_import='`$ECHO "$lt_cv_sys_global_symbol_to_import" | $SED "$delay_single_quote_subst"`'
+lt_cv_sys_global_symbol_to_c_name_address='`$ECHO "$lt_cv_sys_global_symbol_to_c_name_address" | $SED "$delay_single_quote_subst"`'
+lt_cv_sys_global_symbol_to_c_name_address_lib_prefix='`$ECHO "$lt_cv_sys_global_symbol_to_c_name_address_lib_prefix" | $SED "$delay_single_quote_subst"`'
+lt_cv_nm_interface='`$ECHO "$lt_cv_nm_interface" | $SED "$delay_single_quote_subst"`'
+nm_file_list_spec='`$ECHO "$nm_file_list_spec" | $SED "$delay_single_quote_subst"`'
+lt_sysroot='`$ECHO "$lt_sysroot" | $SED "$delay_single_quote_subst"`'
+lt_cv_truncate_bin='`$ECHO "$lt_cv_truncate_bin" | $SED "$delay_single_quote_subst"`'
+objdir='`$ECHO "$objdir" | $SED "$delay_single_quote_subst"`'
+MAGIC_CMD='`$ECHO "$MAGIC_CMD" | $SED "$delay_single_quote_subst"`'
+lt_prog_compiler_no_builtin_flag='`$ECHO "$lt_prog_compiler_no_builtin_flag" | $SED "$delay_single_quote_subst"`'
+lt_prog_compiler_pic='`$ECHO "$lt_prog_compiler_pic" | $SED "$delay_single_quote_subst"`'
+lt_prog_compiler_wl='`$ECHO "$lt_prog_compiler_wl" | $SED "$delay_single_quote_subst"`'
+lt_prog_compiler_static='`$ECHO "$lt_prog_compiler_static" | $SED "$delay_single_quote_subst"`'
+lt_cv_prog_compiler_c_o='`$ECHO "$lt_cv_prog_compiler_c_o" | $SED "$delay_single_quote_subst"`'
+need_locks='`$ECHO "$need_locks" | $SED "$delay_single_quote_subst"`'
+MANIFEST_TOOL='`$ECHO "$MANIFEST_TOOL" | $SED "$delay_single_quote_subst"`'
+DSYMUTIL='`$ECHO "$DSYMUTIL" | $SED "$delay_single_quote_subst"`'
+NMEDIT='`$ECHO "$NMEDIT" | $SED "$delay_single_quote_subst"`'
+LIPO='`$ECHO "$LIPO" | $SED "$delay_single_quote_subst"`'
+OTOOL='`$ECHO "$OTOOL" | $SED "$delay_single_quote_subst"`'
+OTOOL64='`$ECHO "$OTOOL64" | $SED "$delay_single_quote_subst"`'
+libext='`$ECHO "$libext" | $SED "$delay_single_quote_subst"`'
+shrext_cmds='`$ECHO "$shrext_cmds" | $SED "$delay_single_quote_subst"`'
+extract_expsyms_cmds='`$ECHO "$extract_expsyms_cmds" | $SED "$delay_single_quote_subst"`'
+archive_cmds_need_lc='`$ECHO "$archive_cmds_need_lc" | $SED "$delay_single_quote_subst"`'
+enable_shared_with_static_runtimes='`$ECHO "$enable_shared_with_static_runtimes" | $SED "$delay_single_quote_subst"`'
+export_dynamic_flag_spec='`$ECHO "$export_dynamic_flag_spec" | $SED "$delay_single_quote_subst"`'
+whole_archive_flag_spec='`$ECHO "$whole_archive_flag_spec" | $SED "$delay_single_quote_subst"`'
+compiler_needs_object='`$ECHO "$compiler_needs_object" | $SED "$delay_single_quote_subst"`'
+old_archive_from_new_cmds='`$ECHO "$old_archive_from_new_cmds" | $SED "$delay_single_quote_subst"`'
+old_archive_from_expsyms_cmds='`$ECHO "$old_archive_from_expsyms_cmds" | $SED "$delay_single_quote_subst"`'
+archive_cmds='`$ECHO "$archive_cmds" | $SED "$delay_single_quote_subst"`'
+archive_expsym_cmds='`$ECHO "$archive_expsym_cmds" | $SED "$delay_single_quote_subst"`'
+module_cmds='`$ECHO "$module_cmds" | $SED "$delay_single_quote_subst"`'
+module_expsym_cmds='`$ECHO "$module_expsym_cmds" | $SED "$delay_single_quote_subst"`'
+with_gnu_ld='`$ECHO "$with_gnu_ld" | $SED "$delay_single_quote_subst"`'
+allow_undefined_flag='`$ECHO "$allow_undefined_flag" | $SED "$delay_single_quote_subst"`'
+no_undefined_flag='`$ECHO "$no_undefined_flag" | $SED "$delay_single_quote_subst"`'
+hardcode_libdir_flag_spec='`$ECHO "$hardcode_libdir_flag_spec" | $SED "$delay_single_quote_subst"`'
+hardcode_libdir_separator='`$ECHO "$hardcode_libdir_separator" | $SED "$delay_single_quote_subst"`'
+hardcode_direct='`$ECHO "$hardcode_direct" | $SED "$delay_single_quote_subst"`'
+hardcode_direct_absolute='`$ECHO "$hardcode_direct_absolute" | $SED "$delay_single_quote_subst"`'
+hardcode_minus_L='`$ECHO "$hardcode_minus_L" | $SED "$delay_single_quote_subst"`'
+hardcode_shlibpath_var='`$ECHO "$hardcode_shlibpath_var" | $SED "$delay_single_quote_subst"`'
+hardcode_automatic='`$ECHO "$hardcode_automatic" | $SED "$delay_single_quote_subst"`'
+inherit_rpath='`$ECHO "$inherit_rpath" | $SED "$delay_single_quote_subst"`'
+link_all_deplibs='`$ECHO "$link_all_deplibs" | $SED "$delay_single_quote_subst"`'
+always_export_symbols='`$ECHO "$always_export_symbols" | $SED "$delay_single_quote_subst"`'
+export_symbols_cmds='`$ECHO "$export_symbols_cmds" | $SED "$delay_single_quote_subst"`'
+exclude_expsyms='`$ECHO "$exclude_expsyms" | $SED "$delay_single_quote_subst"`'
+include_expsyms='`$ECHO "$include_expsyms" | $SED "$delay_single_quote_subst"`'
+prelink_cmds='`$ECHO "$prelink_cmds" | $SED "$delay_single_quote_subst"`'
+postlink_cmds='`$ECHO "$postlink_cmds" | $SED "$delay_single_quote_subst"`'
+file_list_spec='`$ECHO "$file_list_spec" | $SED "$delay_single_quote_subst"`'
+variables_saved_for_relink='`$ECHO "$variables_saved_for_relink" | $SED "$delay_single_quote_subst"`'
+need_lib_prefix='`$ECHO "$need_lib_prefix" | $SED "$delay_single_quote_subst"`'
+need_version='`$ECHO "$need_version" | $SED "$delay_single_quote_subst"`'
+version_type='`$ECHO "$version_type" | $SED "$delay_single_quote_subst"`'
+runpath_var='`$ECHO "$runpath_var" | $SED "$delay_single_quote_subst"`'
+shlibpath_var='`$ECHO "$shlibpath_var" | $SED "$delay_single_quote_subst"`'
+shlibpath_overrides_runpath='`$ECHO "$shlibpath_overrides_runpath" | $SED "$delay_single_quote_subst"`'
+libname_spec='`$ECHO "$libname_spec" | $SED "$delay_single_quote_subst"`'
+library_names_spec='`$ECHO "$library_names_spec" | $SED "$delay_single_quote_subst"`'
+soname_spec='`$ECHO "$soname_spec" | $SED "$delay_single_quote_subst"`'
+install_override_mode='`$ECHO "$install_override_mode" | $SED "$delay_single_quote_subst"`'
+postinstall_cmds='`$ECHO "$postinstall_cmds" | $SED "$delay_single_quote_subst"`'
+postuninstall_cmds='`$ECHO "$postuninstall_cmds" | $SED "$delay_single_quote_subst"`'
+finish_cmds='`$ECHO "$finish_cmds" | $SED "$delay_single_quote_subst"`'
+finish_eval='`$ECHO "$finish_eval" | $SED "$delay_single_quote_subst"`'
+hardcode_into_libs='`$ECHO "$hardcode_into_libs" | $SED "$delay_single_quote_subst"`'
+sys_lib_search_path_spec='`$ECHO "$sys_lib_search_path_spec" | $SED "$delay_single_quote_subst"`'
+configure_time_dlsearch_path='`$ECHO "$configure_time_dlsearch_path" | $SED "$delay_single_quote_subst"`'
+configure_time_lt_sys_library_path='`$ECHO "$configure_time_lt_sys_library_path" | $SED "$delay_single_quote_subst"`'
+hardcode_action='`$ECHO "$hardcode_action" | $SED "$delay_single_quote_subst"`'
+enable_dlopen='`$ECHO "$enable_dlopen" | $SED "$delay_single_quote_subst"`'
+enable_dlopen_self='`$ECHO "$enable_dlopen_self" | $SED "$delay_single_quote_subst"`'
+enable_dlopen_self_static='`$ECHO "$enable_dlopen_self_static" | $SED "$delay_single_quote_subst"`'
+old_striplib='`$ECHO "$old_striplib" | $SED "$delay_single_quote_subst"`'
+striplib='`$ECHO "$striplib" | $SED "$delay_single_quote_subst"`'
+compiler_lib_search_dirs='`$ECHO "$compiler_lib_search_dirs" | $SED "$delay_single_quote_subst"`'
+predep_objects='`$ECHO "$predep_objects" | $SED "$delay_single_quote_subst"`'
+postdep_objects='`$ECHO "$postdep_objects" | $SED "$delay_single_quote_subst"`'
+predeps='`$ECHO "$predeps" | $SED "$delay_single_quote_subst"`'
+postdeps='`$ECHO "$postdeps" | $SED "$delay_single_quote_subst"`'
+compiler_lib_search_path='`$ECHO "$compiler_lib_search_path" | $SED "$delay_single_quote_subst"`'
+LD_CXX='`$ECHO "$LD_CXX" | $SED "$delay_single_quote_subst"`'
+reload_flag_CXX='`$ECHO "$reload_flag_CXX" | $SED "$delay_single_quote_subst"`'
+reload_cmds_CXX='`$ECHO "$reload_cmds_CXX" | $SED "$delay_single_quote_subst"`'
+old_archive_cmds_CXX='`$ECHO "$old_archive_cmds_CXX" | $SED "$delay_single_quote_subst"`'
+compiler_CXX='`$ECHO "$compiler_CXX" | $SED "$delay_single_quote_subst"`'
+GCC_CXX='`$ECHO "$GCC_CXX" | $SED "$delay_single_quote_subst"`'
+lt_prog_compiler_no_builtin_flag_CXX='`$ECHO "$lt_prog_compiler_no_builtin_flag_CXX" | $SED "$delay_single_quote_subst"`'
+lt_prog_compiler_pic_CXX='`$ECHO "$lt_prog_compiler_pic_CXX" | $SED "$delay_single_quote_subst"`'
+lt_prog_compiler_wl_CXX='`$ECHO "$lt_prog_compiler_wl_CXX" | $SED "$delay_single_quote_subst"`'
+lt_prog_compiler_static_CXX='`$ECHO "$lt_prog_compiler_static_CXX" | $SED "$delay_single_quote_subst"`'
+lt_cv_prog_compiler_c_o_CXX='`$ECHO "$lt_cv_prog_compiler_c_o_CXX" | $SED "$delay_single_quote_subst"`'
+archive_cmds_need_lc_CXX='`$ECHO "$archive_cmds_need_lc_CXX" | $SED "$delay_single_quote_subst"`'
+enable_shared_with_static_runtimes_CXX='`$ECHO "$enable_shared_with_static_runtimes_CXX" | $SED "$delay_single_quote_subst"`'
+export_dynamic_flag_spec_CXX='`$ECHO "$export_dynamic_flag_spec_CXX" | $SED "$delay_single_quote_subst"`'
+whole_archive_flag_spec_CXX='`$ECHO "$whole_archive_flag_spec_CXX" | $SED "$delay_single_quote_subst"`'
+compiler_needs_object_CXX='`$ECHO "$compiler_needs_object_CXX" | $SED "$delay_single_quote_subst"`'
+old_archive_from_new_cmds_CXX='`$ECHO "$old_archive_from_new_cmds_CXX" | $SED "$delay_single_quote_subst"`'
+old_archive_from_expsyms_cmds_CXX='`$ECHO "$old_archive_from_expsyms_cmds_CXX" | $SED "$delay_single_quote_subst"`'
+archive_cmds_CXX='`$ECHO "$archive_cmds_CXX" | $SED "$delay_single_quote_subst"`'
+archive_expsym_cmds_CXX='`$ECHO "$archive_expsym_cmds_CXX" | $SED "$delay_single_quote_subst"`'
+module_cmds_CXX='`$ECHO "$module_cmds_CXX" | $SED "$delay_single_quote_subst"`'
+module_expsym_cmds_CXX='`$ECHO "$module_expsym_cmds_CXX" | $SED "$delay_single_quote_subst"`'
+with_gnu_ld_CXX='`$ECHO "$with_gnu_ld_CXX" | $SED "$delay_single_quote_subst"`'
+allow_undefined_flag_CXX='`$ECHO "$allow_undefined_flag_CXX" | $SED "$delay_single_quote_subst"`'
+no_undefined_flag_CXX='`$ECHO "$no_undefined_flag_CXX" | $SED "$delay_single_quote_subst"`'
+hardcode_libdir_flag_spec_CXX='`$ECHO "$hardcode_libdir_flag_spec_CXX" | $SED "$delay_single_quote_subst"`'
+hardcode_libdir_separator_CXX='`$ECHO "$hardcode_libdir_separator_CXX" | $SED "$delay_single_quote_subst"`'
+hardcode_direct_CXX='`$ECHO "$hardcode_direct_CXX" | $SED "$delay_single_quote_subst"`'
+hardcode_direct_absolute_CXX='`$ECHO "$hardcode_direct_absolute_CXX" | $SED "$delay_single_quote_subst"`'
+hardcode_minus_L_CXX='`$ECHO "$hardcode_minus_L_CXX" | $SED "$delay_single_quote_subst"`'
+hardcode_shlibpath_var_CXX='`$ECHO "$hardcode_shlibpath_var_CXX" | $SED "$delay_single_quote_subst"`'
+hardcode_automatic_CXX='`$ECHO "$hardcode_automatic_CXX" | $SED "$delay_single_quote_subst"`'
+inherit_rpath_CXX='`$ECHO "$inherit_rpath_CXX" | $SED "$delay_single_quote_subst"`'
+link_all_deplibs_CXX='`$ECHO "$link_all_deplibs_CXX" | $SED "$delay_single_quote_subst"`'
+always_export_symbols_CXX='`$ECHO "$always_export_symbols_CXX" | $SED "$delay_single_quote_subst"`'
+export_symbols_cmds_CXX='`$ECHO "$export_symbols_cmds_CXX" | $SED "$delay_single_quote_subst"`'
+exclude_expsyms_CXX='`$ECHO "$exclude_expsyms_CXX" | $SED "$delay_single_quote_subst"`'
+include_expsyms_CXX='`$ECHO "$include_expsyms_CXX" | $SED "$delay_single_quote_subst"`'
+prelink_cmds_CXX='`$ECHO "$prelink_cmds_CXX" | $SED "$delay_single_quote_subst"`'
+postlink_cmds_CXX='`$ECHO "$postlink_cmds_CXX" | $SED "$delay_single_quote_subst"`'
+file_list_spec_CXX='`$ECHO "$file_list_spec_CXX" | $SED "$delay_single_quote_subst"`'
+hardcode_action_CXX='`$ECHO "$hardcode_action_CXX" | $SED "$delay_single_quote_subst"`'
+compiler_lib_search_dirs_CXX='`$ECHO "$compiler_lib_search_dirs_CXX" | $SED "$delay_single_quote_subst"`'
+predep_objects_CXX='`$ECHO "$predep_objects_CXX" | $SED "$delay_single_quote_subst"`'
+postdep_objects_CXX='`$ECHO "$postdep_objects_CXX" | $SED "$delay_single_quote_subst"`'
+predeps_CXX='`$ECHO "$predeps_CXX" | $SED "$delay_single_quote_subst"`'
+postdeps_CXX='`$ECHO "$postdeps_CXX" | $SED "$delay_single_quote_subst"`'
+compiler_lib_search_path_CXX='`$ECHO "$compiler_lib_search_path_CXX" | $SED "$delay_single_quote_subst"`'
+
+LTCC='$LTCC'
+LTCFLAGS='$LTCFLAGS'
+compiler='$compiler_DEFAULT'
+
+# A function that is used when there is no print builtin or printf.
+func_fallback_echo ()
+{
+  eval 'cat <<_LTECHO_EOF
+\$1
+_LTECHO_EOF'
+}
+
+# Quote evaled strings.
+for var in SHELL \
+ECHO \
+PATH_SEPARATOR \
+SED \
+GREP \
+EGREP \
+FGREP \
+LD \
+NM \
+LN_S \
+lt_SP2NL \
+lt_NL2SP \
+reload_flag \
+OBJDUMP \
+deplibs_check_method \
+file_magic_cmd \
+file_magic_glob \
+want_nocaseglob \
+DLLTOOL \
+sharedlib_from_linklib_cmd \
+AR \
+AR_FLAGS \
+archiver_list_spec \
+STRIP \
+RANLIB \
+CC \
+CFLAGS \
+compiler \
+lt_cv_sys_global_symbol_pipe \
+lt_cv_sys_global_symbol_to_cdecl \
+lt_cv_sys_global_symbol_to_import \
+lt_cv_sys_global_symbol_to_c_name_address \
+lt_cv_sys_global_symbol_to_c_name_address_lib_prefix \
+lt_cv_nm_interface \
+nm_file_list_spec \
+lt_cv_truncate_bin \
+lt_prog_compiler_no_builtin_flag \
+lt_prog_compiler_pic \
+lt_prog_compiler_wl \
+lt_prog_compiler_static \
+lt_cv_prog_compiler_c_o \
+need_locks \
+MANIFEST_TOOL \
+DSYMUTIL \
+NMEDIT \
+LIPO \
+OTOOL \
+OTOOL64 \
+shrext_cmds \
+export_dynamic_flag_spec \
+whole_archive_flag_spec \
+compiler_needs_object \
+with_gnu_ld \
+allow_undefined_flag \
+no_undefined_flag \
+hardcode_libdir_flag_spec \
+hardcode_libdir_separator \
+exclude_expsyms \
+include_expsyms \
+file_list_spec \
+variables_saved_for_relink \
+libname_spec \
+library_names_spec \
+soname_spec \
+install_override_mode \
+finish_eval \
+old_striplib \
+striplib \
+compiler_lib_search_dirs \
+predep_objects \
+postdep_objects \
+predeps \
+postdeps \
+compiler_lib_search_path \
+LD_CXX \
+reload_flag_CXX \
+compiler_CXX \
+lt_prog_compiler_no_builtin_flag_CXX \
+lt_prog_compiler_pic_CXX \
+lt_prog_compiler_wl_CXX \
+lt_prog_compiler_static_CXX \
+lt_cv_prog_compiler_c_o_CXX \
+export_dynamic_flag_spec_CXX \
+whole_archive_flag_spec_CXX \
+compiler_needs_object_CXX \
+with_gnu_ld_CXX \
+allow_undefined_flag_CXX \
+no_undefined_flag_CXX \
+hardcode_libdir_flag_spec_CXX \
+hardcode_libdir_separator_CXX \
+exclude_expsyms_CXX \
+include_expsyms_CXX \
+file_list_spec_CXX \
+compiler_lib_search_dirs_CXX \
+predep_objects_CXX \
+postdep_objects_CXX \
+predeps_CXX \
+postdeps_CXX \
+compiler_lib_search_path_CXX; do
+    case \`eval \\\\\$ECHO \\\\""\\\\\$\$var"\\\\"\` in
+    *[\\\\\\\`\\"\\\$]*)
+      eval "lt_\$var=\\\\\\"\\\`\\\$ECHO \\"\\\$\$var\\" | \\\$SED \\"\\\$sed_quote_subst\\"\\\`\\\\\\"" ## exclude from sc_prohibit_nested_quotes
+      ;;
+    *)
+      eval "lt_\$var=\\\\\\"\\\$\$var\\\\\\""
+      ;;
+    esac
+done
+
+# Double-quote double-evaled strings.
+for var in reload_cmds \
+old_postinstall_cmds \
+old_postuninstall_cmds \
+old_archive_cmds \
+extract_expsyms_cmds \
+old_archive_from_new_cmds \
+old_archive_from_expsyms_cmds \
+archive_cmds \
+archive_expsym_cmds \
+module_cmds \
+module_expsym_cmds \
+export_symbols_cmds \
+prelink_cmds \
+postlink_cmds \
+postinstall_cmds \
+postuninstall_cmds \
+finish_cmds \
+sys_lib_search_path_spec \
+configure_time_dlsearch_path \
+configure_time_lt_sys_library_path \
+reload_cmds_CXX \
+old_archive_cmds_CXX \
+old_archive_from_new_cmds_CXX \
+old_archive_from_expsyms_cmds_CXX \
+archive_cmds_CXX \
+archive_expsym_cmds_CXX \
+module_cmds_CXX \
+module_expsym_cmds_CXX \
+export_symbols_cmds_CXX \
+prelink_cmds_CXX \
+postlink_cmds_CXX; do
+    case \`eval \\\\\$ECHO \\\\""\\\\\$\$var"\\\\"\` in
+    *[\\\\\\\`\\"\\\$]*)
+      eval "lt_\$var=\\\\\\"\\\`\\\$ECHO \\"\\\$\$var\\" | \\\$SED -e \\"\\\$double_quote_subst\\" -e \\"\\\$sed_quote_subst\\" -e \\"\\\$delay_variable_subst\\"\\\`\\\\\\"" ## exclude from sc_prohibit_nested_quotes
+      ;;
+    *)
+      eval "lt_\$var=\\\\\\"\\\$\$var\\\\\\""
+      ;;
+    esac
+done
+
+ac_aux_dir='$ac_aux_dir'
+
+# See if we are running on zsh, and set the options that allow our
+# commands through without removal of \ escapes INIT.
+if test -n "\${ZSH_VERSION+set}"; then
+   setopt NO_GLOB_SUBST
+fi
+
+
+    PACKAGE='$PACKAGE'
+    VERSION='$VERSION'
+    RM='$RM'
+    ofile='$ofile'
+
+
+
+
+
+
+_ACEOF
+
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+
+# Handling of arguments.
+for ac_config_target in $ac_config_targets
+do
+  case $ac_config_target in
+    "include/config.h") CONFIG_HEADERS="$CONFIG_HEADERS include/config.h" ;;
+    "depfiles") CONFIG_COMMANDS="$CONFIG_COMMANDS depfiles" ;;
+    "libtool") CONFIG_COMMANDS="$CONFIG_COMMANDS libtool" ;;
+    "doc/Makefile") CONFIG_FILES="$CONFIG_FILES doc/Makefile" ;;
+    "doc/common.tex") CONFIG_FILES="$CONFIG_FILES doc/common.tex" ;;
+    "tests/Makefile") CONFIG_FILES="$CONFIG_FILES tests/Makefile" ;;
+    "tests/check-namespace.sh") CONFIG_FILES="$CONFIG_FILES tests/check-namespace.sh" ;;
+    "Makefile") CONFIG_FILES="$CONFIG_FILES Makefile" ;;
+    "src/Makefile") CONFIG_FILES="$CONFIG_FILES src/Makefile" ;;
+    "include/libunwind-common.h") CONFIG_FILES="$CONFIG_FILES include/libunwind-common.h" ;;
+    "include/libunwind.h") CONFIG_FILES="$CONFIG_FILES include/libunwind.h" ;;
+    "include/tdep/libunwind_i.h") CONFIG_FILES="$CONFIG_FILES include/tdep/libunwind_i.h" ;;
+    "src/unwind/libunwind.pc") CONFIG_FILES="$CONFIG_FILES src/unwind/libunwind.pc" ;;
+    "src/coredump/libunwind-coredump.pc") CONFIG_FILES="$CONFIG_FILES src/coredump/libunwind-coredump.pc" ;;
+    "src/ptrace/libunwind-ptrace.pc") CONFIG_FILES="$CONFIG_FILES src/ptrace/libunwind-ptrace.pc" ;;
+    "src/setjmp/libunwind-setjmp.pc") CONFIG_FILES="$CONFIG_FILES src/setjmp/libunwind-setjmp.pc" ;;
+    "src/libunwind-generic.pc") CONFIG_FILES="$CONFIG_FILES src/libunwind-generic.pc" ;;
+
+  *) as_fn_error $? "invalid argument: \`$ac_config_target'" "$LINENO" 5;;
+  esac
+done
+
+
+# If the user did not use the arguments to specify the items to instantiate,
+# then the envvar interface is used.  Set only those that are not.
+# We use the long form for the default assignment because of an extremely
+# bizarre bug on SunOS 4.1.3.
+if $ac_need_defaults; then
+  test "${CONFIG_FILES+set}" = set || CONFIG_FILES=$config_files
+  test "${CONFIG_HEADERS+set}" = set || CONFIG_HEADERS=$config_headers
+  test "${CONFIG_COMMANDS+set}" = set || CONFIG_COMMANDS=$config_commands
+fi
+
+# Have a temporary directory for convenience.  Make it in the build tree
+# simply because there is no reason against having it here, and in addition,
+# creating and moving files from /tmp can sometimes cause problems.
+# Hook for its removal unless debugging.
+# Note that there is a small window in which the directory will not be cleaned:
+# after its creation but before its name has been assigned to `$tmp'.
+$debug ||
+{
+  tmp= ac_tmp=
+  trap 'exit_status=$?
+  : "${ac_tmp:=$tmp}"
+  { test ! -d "$ac_tmp" || rm -fr "$ac_tmp"; } && exit $exit_status
+' 0
+  trap 'as_fn_exit 1' 1 2 13 15
+}
+# Create a (secure) tmp directory for tmp files.
+
+{
+  tmp=`(umask 077 && mktemp -d "./confXXXXXX") 2>/dev/null` &&
+  test -d "$tmp"
+}  ||
+{
+  tmp=./conf$$-$RANDOM
+  (umask 077 && mkdir "$tmp")
+} || as_fn_error $? "cannot create a temporary directory in ." "$LINENO" 5
+ac_tmp=$tmp
+
+# Set up the scripts for CONFIG_FILES section.
+# No need to generate them if there are no CONFIG_FILES.
+# This happens for instance with `./config.status config.h'.
+if test -n "$CONFIG_FILES"; then
+
+
+ac_cr=`echo X | tr X '\015'`
+# On cygwin, bash can eat \r inside `` if the user requested igncr.
+# But we know of no other shell where ac_cr would be empty at this
+# point, so we can use a bashism as a fallback.
+if test "x$ac_cr" = x; then
+  eval ac_cr=\$\'\\r\'
+fi
+ac_cs_awk_cr=`$AWK 'BEGIN { print "a\rb" }' </dev/null 2>/dev/null`
+if test "$ac_cs_awk_cr" = "a${ac_cr}b"; then
+  ac_cs_awk_cr='\\r'
+else
+  ac_cs_awk_cr=$ac_cr
+fi
+
+echo 'BEGIN {' >"$ac_tmp/subs1.awk" &&
+_ACEOF
+
+
+{
+  echo "cat >conf$$subs.awk <<_ACEOF" &&
+  echo "$ac_subst_vars" | sed 's/.*/&!$&$ac_delim/' &&
+  echo "_ACEOF"
+} >conf$$subs.sh ||
+  as_fn_error $? "could not make $CONFIG_STATUS" "$LINENO" 5
+ac_delim_num=`echo "$ac_subst_vars" | grep -c '^'`
+ac_delim='%!_!# '
+for ac_last_try in false false false false false :; do
+  . ./conf$$subs.sh ||
+    as_fn_error $? "could not make $CONFIG_STATUS" "$LINENO" 5
+
+  ac_delim_n=`sed -n "s/.*$ac_delim\$/X/p" conf$$subs.awk | grep -c X`
+  if test $ac_delim_n = $ac_delim_num; then
+    break
+  elif $ac_last_try; then
+    as_fn_error $? "could not make $CONFIG_STATUS" "$LINENO" 5
+  else
+    ac_delim="$ac_delim!$ac_delim _$ac_delim!! "
+  fi
+done
+rm -f conf$$subs.sh
+
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+cat >>"\$ac_tmp/subs1.awk" <<\\_ACAWK &&
+_ACEOF
+sed -n '
+h
+s/^/S["/; s/!.*/"]=/
+p
+g
+s/^[^!]*!//
+:repl
+t repl
+s/'"$ac_delim"'$//
+t delim
+:nl
+h
+s/\(.\{148\}\)..*/\1/
+t more1
+s/["\\]/\\&/g; s/^/"/; s/$/\\n"\\/
+p
+n
+b repl
+:more1
+s/["\\]/\\&/g; s/^/"/; s/$/"\\/
+p
+g
+s/.\{148\}//
+t nl
+:delim
+h
+s/\(.\{148\}\)..*/\1/
+t more2
+s/["\\]/\\&/g; s/^/"/; s/$/"/
+p
+b
+:more2
+s/["\\]/\\&/g; s/^/"/; s/$/"\\/
+p
+g
+s/.\{148\}//
+t delim
+' <conf$$subs.awk | sed '
+/^[^""]/{
+  N
+  s/\n//
+}
+' >>$CONFIG_STATUS || ac_write_fail=1
+rm -f conf$$subs.awk
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+_ACAWK
+cat >>"\$ac_tmp/subs1.awk" <<_ACAWK &&
+  for (key in S) S_is_set[key] = 1
+  FS = ""
+
+}
+{
+  line = $ 0
+  nfields = split(line, field, "@")
+  substed = 0
+  len = length(field[1])
+  for (i = 2; i < nfields; i++) {
+    key = field[i]
+    keylen = length(key)
+    if (S_is_set[key]) {
+      value = S[key]
+      line = substr(line, 1, len) "" value "" substr(line, len + keylen + 3)
+      len += length(value) + length(field[++i])
+      substed = 1
+    } else
+      len += 1 + keylen
+  }
+
+  print line
+}
+
+_ACAWK
+_ACEOF
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+if sed "s/$ac_cr//" < /dev/null > /dev/null 2>&1; then
+  sed "s/$ac_cr\$//; s/$ac_cr/$ac_cs_awk_cr/g"
+else
+  cat
+fi < "$ac_tmp/subs1.awk" > "$ac_tmp/subs.awk" \
+  || as_fn_error $? "could not setup config files machinery" "$LINENO" 5
+_ACEOF
+
+# VPATH may cause trouble with some makes, so we remove sole $(srcdir),
+# ${srcdir} and @srcdir@ entries from VPATH if srcdir is ".", strip leading and
+# trailing colons and then remove the whole line if VPATH becomes empty
+# (actually we leave an empty line to preserve line numbers).
+if test "x$srcdir" = x.; then
+  ac_vpsub='/^[	 ]*VPATH[	 ]*=[	 ]*/{
+h
+s///
+s/^/:/
+s/[	 ]*$/:/
+s/:\$(srcdir):/:/g
+s/:\${srcdir}:/:/g
+s/:@srcdir@:/:/g
+s/^:*//
+s/:*$//
+x
+s/\(=[	 ]*\).*/\1/
+G
+s/\n//
+s/^[^=]*=[	 ]*$//
+}'
+fi
+
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+fi # test -n "$CONFIG_FILES"
+
+# Set up the scripts for CONFIG_HEADERS section.
+# No need to generate them if there are no CONFIG_HEADERS.
+# This happens for instance with `./config.status Makefile'.
+if test -n "$CONFIG_HEADERS"; then
+cat >"$ac_tmp/defines.awk" <<\_ACAWK ||
+BEGIN {
+_ACEOF
+
+# Transform confdefs.h into an awk script `defines.awk', embedded as
+# here-document in config.status, that substitutes the proper values into
+# config.h.in to produce config.h.
+
+# Create a delimiter string that does not exist in confdefs.h, to ease
+# handling of long lines.
+ac_delim='%!_!# '
+for ac_last_try in false false :; do
+  ac_tt=`sed -n "/$ac_delim/p" confdefs.h`
+  if test -z "$ac_tt"; then
+    break
+  elif $ac_last_try; then
+    as_fn_error $? "could not make $CONFIG_HEADERS" "$LINENO" 5
+  else
+    ac_delim="$ac_delim!$ac_delim _$ac_delim!! "
+  fi
+done
+
+# For the awk script, D is an array of macro values keyed by name,
+# likewise P contains macro parameters if any.  Preserve backslash
+# newline sequences.
+
+ac_word_re=[_$as_cr_Letters][_$as_cr_alnum]*
+sed -n '
+s/.\{148\}/&'"$ac_delim"'/g
+t rset
+:rset
+s/^[	 ]*#[	 ]*define[	 ][	 ]*/ /
+t def
+d
+:def
+s/\\$//
+t bsnl
+s/["\\]/\\&/g
+s/^ \('"$ac_word_re"'\)\(([^()]*)\)[	 ]*\(.*\)/P["\1"]="\2"\
+D["\1"]=" \3"/p
+s/^ \('"$ac_word_re"'\)[	 ]*\(.*\)/D["\1"]=" \2"/p
+d
+:bsnl
+s/["\\]/\\&/g
+s/^ \('"$ac_word_re"'\)\(([^()]*)\)[	 ]*\(.*\)/P["\1"]="\2"\
+D["\1"]=" \3\\\\\\n"\\/p
+t cont
+s/^ \('"$ac_word_re"'\)[	 ]*\(.*\)/D["\1"]=" \2\\\\\\n"\\/p
+t cont
+d
+:cont
+n
+s/.\{148\}/&'"$ac_delim"'/g
+t clear
+:clear
+s/\\$//
+t bsnlc
+s/["\\]/\\&/g; s/^/"/; s/$/"/p
+d
+:bsnlc
+s/["\\]/\\&/g; s/^/"/; s/$/\\\\\\n"\\/p
+b cont
+' <confdefs.h | sed '
+s/'"$ac_delim"'/"\\\
+"/g' >>$CONFIG_STATUS || ac_write_fail=1
+
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+  for (key in D) D_is_set[key] = 1
+  FS = ""
+}
+/^[\t ]*#[\t ]*(define|undef)[\t ]+$ac_word_re([\t (]|\$)/ {
+  line = \$ 0
+  split(line, arg, " ")
+  if (arg[1] == "#") {
+    defundef = arg[2]
+    mac1 = arg[3]
+  } else {
+    defundef = substr(arg[1], 2)
+    mac1 = arg[2]
+  }
+  split(mac1, mac2, "(") #)
+  macro = mac2[1]
+  prefix = substr(line, 1, index(line, defundef) - 1)
+  if (D_is_set[macro]) {
+    # Preserve the white space surrounding the "#".
+    print prefix "define", macro P[macro] D[macro]
+    next
+  } else {
+    # Replace #undef with comments.  This is necessary, for example,
+    # in the case of _POSIX_SOURCE, which is predefined and required
+    # on some systems where configure will not decide to define it.
+    if (defundef == "undef") {
+      print "/*", prefix defundef, macro, "*/"
+      next
+    }
+  }
+}
+{ print }
+_ACAWK
+_ACEOF
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+  as_fn_error $? "could not setup config headers machinery" "$LINENO" 5
+fi # test -n "$CONFIG_HEADERS"
+
+
+eval set X "  :F $CONFIG_FILES  :H $CONFIG_HEADERS    :C $CONFIG_COMMANDS"
+shift
+for ac_tag
+do
+  case $ac_tag in
+  :[FHLC]) ac_mode=$ac_tag; continue;;
+  esac
+  case $ac_mode$ac_tag in
+  :[FHL]*:*);;
+  :L* | :C*:*) as_fn_error $? "invalid tag \`$ac_tag'" "$LINENO" 5;;
+  :[FH]-) ac_tag=-:-;;
+  :[FH]*) ac_tag=$ac_tag:$ac_tag.in;;
+  esac
+  ac_save_IFS=$IFS
+  IFS=:
+  set x $ac_tag
+  IFS=$ac_save_IFS
+  shift
+  ac_file=$1
+  shift
+
+  case $ac_mode in
+  :L) ac_source=$1;;
+  :[FH])
+    ac_file_inputs=
+    for ac_f
+    do
+      case $ac_f in
+      -) ac_f="$ac_tmp/stdin";;
+      *) # Look for the file first in the build tree, then in the source tree
+	 # (if the path is not absolute).  The absolute path cannot be DOS-style,
+	 # because $ac_f cannot contain `:'.
+	 test -f "$ac_f" ||
+	   case $ac_f in
+	   [\\/$]*) false;;
+	   *) test -f "$srcdir/$ac_f" && ac_f="$srcdir/$ac_f";;
+	   esac ||
+	   as_fn_error 1 "cannot find input file: \`$ac_f'" "$LINENO" 5;;
+      esac
+      case $ac_f in *\'*) ac_f=`$as_echo "$ac_f" | sed "s/'/'\\\\\\\\''/g"`;; esac
+      as_fn_append ac_file_inputs " '$ac_f'"
+    done
+
+    # Let's still pretend it is `configure' which instantiates (i.e., don't
+    # use $as_me), people would be surprised to read:
+    #    /* config.h.  Generated by config.status.  */
+    configure_input='Generated from '`
+	  $as_echo "$*" | sed 's|^[^:]*/||;s|:[^:]*/|, |g'
+	`' by configure.'
+    if test x"$ac_file" != x-; then
+      configure_input="$ac_file.  $configure_input"
+      { $as_echo "$as_me:${as_lineno-$LINENO}: creating $ac_file" >&5
+$as_echo "$as_me: creating $ac_file" >&6;}
+    fi
+    # Neutralize special characters interpreted by sed in replacement strings.
+    case $configure_input in #(
+    *\&* | *\|* | *\\* )
+       ac_sed_conf_input=`$as_echo "$configure_input" |
+       sed 's/[\\\\&|]/\\\\&/g'`;; #(
+    *) ac_sed_conf_input=$configure_input;;
+    esac
+
+    case $ac_tag in
+    *:-:* | *:-) cat >"$ac_tmp/stdin" \
+      || as_fn_error $? "could not create $ac_file" "$LINENO" 5 ;;
+    esac
+    ;;
+  esac
+
+  ac_dir=`$as_dirname -- "$ac_file" ||
+$as_expr X"$ac_file" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	 X"$ac_file" : 'X\(//\)[^/]' \| \
+	 X"$ac_file" : 'X\(//\)$' \| \
+	 X"$ac_file" : 'X\(/\)' \| . 2>/dev/null ||
+$as_echo X"$ac_file" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)[^/].*/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+  as_dir="$ac_dir"; as_fn_mkdir_p
+  ac_builddir=.
+
+case "$ac_dir" in
+.) ac_dir_suffix= ac_top_builddir_sub=. ac_top_build_prefix= ;;
+*)
+  ac_dir_suffix=/`$as_echo "$ac_dir" | sed 's|^\.[\\/]||'`
+  # A ".." for each directory in $ac_dir_suffix.
+  ac_top_builddir_sub=`$as_echo "$ac_dir_suffix" | sed 's|/[^\\/]*|/..|g;s|/||'`
+  case $ac_top_builddir_sub in
+  "") ac_top_builddir_sub=. ac_top_build_prefix= ;;
+  *)  ac_top_build_prefix=$ac_top_builddir_sub/ ;;
+  esac ;;
+esac
+ac_abs_top_builddir=$ac_pwd
+ac_abs_builddir=$ac_pwd$ac_dir_suffix
+# for backward compatibility:
+ac_top_builddir=$ac_top_build_prefix
+
+case $srcdir in
+  .)  # We are building in place.
+    ac_srcdir=.
+    ac_top_srcdir=$ac_top_builddir_sub
+    ac_abs_top_srcdir=$ac_pwd ;;
+  [\\/]* | ?:[\\/]* )  # Absolute name.
+    ac_srcdir=$srcdir$ac_dir_suffix;
+    ac_top_srcdir=$srcdir
+    ac_abs_top_srcdir=$srcdir ;;
+  *) # Relative name.
+    ac_srcdir=$ac_top_build_prefix$srcdir$ac_dir_suffix
+    ac_top_srcdir=$ac_top_build_prefix$srcdir
+    ac_abs_top_srcdir=$ac_pwd/$srcdir ;;
+esac
+ac_abs_srcdir=$ac_abs_top_srcdir$ac_dir_suffix
+
+
+  case $ac_mode in
+  :F)
+  #
+  # CONFIG_FILE
+  #
+
+  case $INSTALL in
+  [\\/$]* | ?:[\\/]* ) ac_INSTALL=$INSTALL ;;
+  *) ac_INSTALL=$ac_top_build_prefix$INSTALL ;;
+  esac
+  ac_MKDIR_P=$MKDIR_P
+  case $MKDIR_P in
+  [\\/$]* | ?:[\\/]* ) ;;
+  */*) ac_MKDIR_P=$ac_top_build_prefix$MKDIR_P ;;
+  esac
+_ACEOF
+
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+# If the template does not know about datarootdir, expand it.
+# FIXME: This hack should be removed a few years after 2.60.
+ac_datarootdir_hack=; ac_datarootdir_seen=
+ac_sed_dataroot='
+/datarootdir/ {
+  p
+  q
+}
+/@datadir@/p
+/@docdir@/p
+/@infodir@/p
+/@localedir@/p
+/@mandir@/p'
+case `eval "sed -n \"\$ac_sed_dataroot\" $ac_file_inputs"` in
+*datarootdir*) ac_datarootdir_seen=yes;;
+*@datadir@*|*@docdir@*|*@infodir@*|*@localedir@*|*@mandir@*)
+  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file_inputs seems to ignore the --datarootdir setting" >&5
+$as_echo "$as_me: WARNING: $ac_file_inputs seems to ignore the --datarootdir setting" >&2;}
+_ACEOF
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+  ac_datarootdir_hack='
+  s&@datadir@&$datadir&g
+  s&@docdir@&$docdir&g
+  s&@infodir@&$infodir&g
+  s&@localedir@&$localedir&g
+  s&@mandir@&$mandir&g
+  s&\\\${datarootdir}&$datarootdir&g' ;;
+esac
+_ACEOF
+
+# Neutralize VPATH when `$srcdir' = `.'.
+# Shell code in configure.ac might set extrasub.
+# FIXME: do we really want to maintain this feature?
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+ac_sed_extra="$ac_vpsub
+$extrasub
+_ACEOF
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+:t
+/@[a-zA-Z_][a-zA-Z_0-9]*@/!b
+s|@configure_input@|$ac_sed_conf_input|;t t
+s&@top_builddir@&$ac_top_builddir_sub&;t t
+s&@top_build_prefix@&$ac_top_build_prefix&;t t
+s&@srcdir@&$ac_srcdir&;t t
+s&@abs_srcdir@&$ac_abs_srcdir&;t t
+s&@top_srcdir@&$ac_top_srcdir&;t t
+s&@abs_top_srcdir@&$ac_abs_top_srcdir&;t t
+s&@builddir@&$ac_builddir&;t t
+s&@abs_builddir@&$ac_abs_builddir&;t t
+s&@abs_top_builddir@&$ac_abs_top_builddir&;t t
+s&@INSTALL@&$ac_INSTALL&;t t
+s&@MKDIR_P@&$ac_MKDIR_P&;t t
+$ac_datarootdir_hack
+"
+eval sed \"\$ac_sed_extra\" "$ac_file_inputs" | $AWK -f "$ac_tmp/subs.awk" \
+  >$ac_tmp/out || as_fn_error $? "could not create $ac_file" "$LINENO" 5
+
+test -z "$ac_datarootdir_hack$ac_datarootdir_seen" &&
+  { ac_out=`sed -n '/\${datarootdir}/p' "$ac_tmp/out"`; test -n "$ac_out"; } &&
+  { ac_out=`sed -n '/^[	 ]*datarootdir[	 ]*:*=/p' \
+      "$ac_tmp/out"`; test -z "$ac_out"; } &&
+  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file contains a reference to the variable \`datarootdir'
+which seems to be undefined.  Please make sure it is defined" >&5
+$as_echo "$as_me: WARNING: $ac_file contains a reference to the variable \`datarootdir'
+which seems to be undefined.  Please make sure it is defined" >&2;}
+
+  rm -f "$ac_tmp/stdin"
+  case $ac_file in
+  -) cat "$ac_tmp/out" && rm -f "$ac_tmp/out";;
+  *) rm -f "$ac_file" && mv "$ac_tmp/out" "$ac_file";;
+  esac \
+  || as_fn_error $? "could not create $ac_file" "$LINENO" 5
+ ;;
+  :H)
+  #
+  # CONFIG_HEADER
+  #
+  if test x"$ac_file" != x-; then
+    {
+      $as_echo "/* $configure_input  */" \
+      && eval '$AWK -f "$ac_tmp/defines.awk"' "$ac_file_inputs"
+    } >"$ac_tmp/config.h" \
+      || as_fn_error $? "could not create $ac_file" "$LINENO" 5
+    if diff "$ac_file" "$ac_tmp/config.h" >/dev/null 2>&1; then
+      { $as_echo "$as_me:${as_lineno-$LINENO}: $ac_file is unchanged" >&5
+$as_echo "$as_me: $ac_file is unchanged" >&6;}
+    else
+      rm -f "$ac_file"
+      mv "$ac_tmp/config.h" "$ac_file" \
+	|| as_fn_error $? "could not create $ac_file" "$LINENO" 5
+    fi
+  else
+    $as_echo "/* $configure_input  */" \
+      && eval '$AWK -f "$ac_tmp/defines.awk"' "$ac_file_inputs" \
+      || as_fn_error $? "could not create -" "$LINENO" 5
+  fi
+# Compute "$ac_file"'s index in $config_headers.
+_am_arg="$ac_file"
+_am_stamp_count=1
+for _am_header in $config_headers :; do
+  case $_am_header in
+    $_am_arg | $_am_arg:* )
+      break ;;
+    * )
+      _am_stamp_count=`expr $_am_stamp_count + 1` ;;
+  esac
+done
+echo "timestamp for $_am_arg" >`$as_dirname -- "$_am_arg" ||
+$as_expr X"$_am_arg" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	 X"$_am_arg" : 'X\(//\)[^/]' \| \
+	 X"$_am_arg" : 'X\(//\)$' \| \
+	 X"$_am_arg" : 'X\(/\)' \| . 2>/dev/null ||
+$as_echo X"$_am_arg" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)[^/].*/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`/stamp-h$_am_stamp_count
+ ;;
+
+  :C)  { $as_echo "$as_me:${as_lineno-$LINENO}: executing $ac_file commands" >&5
+$as_echo "$as_me: executing $ac_file commands" >&6;}
+ ;;
+  esac
+
+
+  case $ac_file$ac_mode in
+    "depfiles":C) test x"$AMDEP_TRUE" != x"" || {
+  # Older Autoconf quotes --file arguments for eval, but not when files
+  # are listed without --file.  Let's play safe and only enable the eval
+  # if we detect the quoting.
+  case $CONFIG_FILES in
+  *\'*) eval set x "$CONFIG_FILES" ;;
+  *)   set x $CONFIG_FILES ;;
+  esac
+  shift
+  for mf
+  do
+    # Strip MF so we end up with the name of the file.
+    mf=`echo "$mf" | sed -e 's/:.*$//'`
+    # Check whether this is an Automake generated Makefile or not.
+    # We used to match only the files named 'Makefile.in', but
+    # some people rename them; so instead we look at the file content.
+    # Grep'ing the first line is not enough: some people post-process
+    # each Makefile.in and add a new line on top of each file to say so.
+    # Grep'ing the whole file is not good either: AIX grep has a line
+    # limit of 2048, but all sed's we know have understand at least 4000.
+    if sed -n 's,^#.*generated by automake.*,X,p' "$mf" | grep X >/dev/null 2>&1; then
+      dirpart=`$as_dirname -- "$mf" ||
+$as_expr X"$mf" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	 X"$mf" : 'X\(//\)[^/]' \| \
+	 X"$mf" : 'X\(//\)$' \| \
+	 X"$mf" : 'X\(/\)' \| . 2>/dev/null ||
+$as_echo X"$mf" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)[^/].*/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+    else
+      continue
+    fi
+    # Extract the definition of DEPDIR, am__include, and am__quote
+    # from the Makefile without running 'make'.
+    DEPDIR=`sed -n 's/^DEPDIR = //p' < "$mf"`
+    test -z "$DEPDIR" && continue
+    am__include=`sed -n 's/^am__include = //p' < "$mf"`
+    test -z "$am__include" && continue
+    am__quote=`sed -n 's/^am__quote = //p' < "$mf"`
+    # Find all dependency output files, they are included files with
+    # $(DEPDIR) in their names.  We invoke sed twice because it is the
+    # simplest approach to changing $(DEPDIR) to its actual value in the
+    # expansion.
+    for file in `sed -n "
+      s/^$am__include $am__quote\(.*(DEPDIR).*\)$am__quote"'$/\1/p' <"$mf" | \
+	 sed -e 's/\$(DEPDIR)/'"$DEPDIR"'/g'`; do
+      # Make sure the directory exists.
+      test -f "$dirpart/$file" && continue
+      fdir=`$as_dirname -- "$file" ||
+$as_expr X"$file" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	 X"$file" : 'X\(//\)[^/]' \| \
+	 X"$file" : 'X\(//\)$' \| \
+	 X"$file" : 'X\(/\)' \| . 2>/dev/null ||
+$as_echo X"$file" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)[^/].*/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+      as_dir=$dirpart/$fdir; as_fn_mkdir_p
+      # echo "creating $dirpart/$file"
+      echo '# dummy' > "$dirpart/$file"
+    done
+  done
+}
+ ;;
+    "libtool":C)
+
+    # See if we are running on zsh, and set the options that allow our
+    # commands through without removal of \ escapes.
+    if test -n "${ZSH_VERSION+set}"; then
+      setopt NO_GLOB_SUBST
+    fi
+
+    cfgfile=${ofile}T
+    trap "$RM \"$cfgfile\"; exit 1" 1 2 15
+    $RM "$cfgfile"
+
+    cat <<_LT_EOF >> "$cfgfile"
+#! $SHELL
+# Generated automatically by $as_me ($PACKAGE) $VERSION
+# NOTE: Changes made to this file will be lost: look at ltmain.sh.
+
+# Provide generalized library-building support services.
+# Written by Gordon Matzigkeit, 1996
+
+# Copyright (C) 2014 Free Software Foundation, Inc.
+# This is free software; see the source for copying conditions.  There is NO
+# warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+# GNU Libtool is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of of the License, or
+# (at your option) any later version.
+#
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program or library that is built
+# using GNU Libtool, you may include this file under the  same
+# distribution terms that you use for the rest of that program.
+#
+# GNU Libtool is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+# The names of the tagged configurations supported by this script.
+available_tags='CXX '
+
+# Configured defaults for sys_lib_dlsearch_path munging.
+: \${LT_SYS_LIBRARY_PATH="$configure_time_lt_sys_library_path"}
+
+# ### BEGIN LIBTOOL CONFIG
+
+# Which release of libtool.m4 was used?
+macro_version=$macro_version
+macro_revision=$macro_revision
+
+# Whether or not to build shared libraries.
+build_libtool_libs=$enable_shared
+
+# Whether or not to build static libraries.
+build_old_libs=$enable_static
+
+# What type of objects to build.
+pic_mode=$pic_mode
+
+# Whether or not to optimize for fast installation.
+fast_install=$enable_fast_install
+
+# Shared archive member basename,for filename based shared library versioning on AIX.
+shared_archive_member_spec=$shared_archive_member_spec
+
+# Shell to use when invoking shell scripts.
+SHELL=$lt_SHELL
+
+# An echo program that protects backslashes.
+ECHO=$lt_ECHO
+
+# The PATH separator for the build system.
+PATH_SEPARATOR=$lt_PATH_SEPARATOR
+
+# The host system.
+host_alias=$host_alias
+host=$host
+host_os=$host_os
+
+# The build system.
+build_alias=$build_alias
+build=$build
+build_os=$build_os
+
+# A sed program that does not truncate output.
+SED=$lt_SED
+
+# Sed that helps us avoid accidentally triggering echo(1) options like -n.
+Xsed="\$SED -e 1s/^X//"
+
+# A grep program that handles long lines.
+GREP=$lt_GREP
+
+# An ERE matcher.
+EGREP=$lt_EGREP
+
+# A literal string matcher.
+FGREP=$lt_FGREP
+
+# A BSD- or MS-compatible name lister.
+NM=$lt_NM
+
+# Whether we need soft or hard links.
+LN_S=$lt_LN_S
+
+# What is the maximum length of a command?
+max_cmd_len=$max_cmd_len
+
+# Object file suffix (normally "o").
+objext=$ac_objext
+
+# Executable file suffix (normally "").
+exeext=$exeext
+
+# whether the shell understands "unset".
+lt_unset=$lt_unset
+
+# turn spaces into newlines.
+SP2NL=$lt_lt_SP2NL
+
+# turn newlines into spaces.
+NL2SP=$lt_lt_NL2SP
+
+# convert \$build file names to \$host format.
+to_host_file_cmd=$lt_cv_to_host_file_cmd
+
+# convert \$build files to toolchain format.
+to_tool_file_cmd=$lt_cv_to_tool_file_cmd
+
+# An object symbol dumper.
+OBJDUMP=$lt_OBJDUMP
+
+# Method to check whether dependent libraries are shared objects.
+deplibs_check_method=$lt_deplibs_check_method
+
+# Command to use when deplibs_check_method = "file_magic".
+file_magic_cmd=$lt_file_magic_cmd
+
+# How to find potential files when deplibs_check_method = "file_magic".
+file_magic_glob=$lt_file_magic_glob
+
+# Find potential files using nocaseglob when deplibs_check_method = "file_magic".
+want_nocaseglob=$lt_want_nocaseglob
+
+# DLL creation program.
+DLLTOOL=$lt_DLLTOOL
+
+# Command to associate shared and link libraries.
+sharedlib_from_linklib_cmd=$lt_sharedlib_from_linklib_cmd
+
+# The archiver.
+AR=$lt_AR
+
+# Flags to create an archive.
+AR_FLAGS=$lt_AR_FLAGS
+
+# How to feed a file listing to the archiver.
+archiver_list_spec=$lt_archiver_list_spec
+
+# A symbol stripping program.
+STRIP=$lt_STRIP
+
+# Commands used to install an old-style archive.
+RANLIB=$lt_RANLIB
+old_postinstall_cmds=$lt_old_postinstall_cmds
+old_postuninstall_cmds=$lt_old_postuninstall_cmds
+
+# Whether to use a lock for old archive extraction.
+lock_old_archive_extraction=$lock_old_archive_extraction
+
+# A C compiler.
+LTCC=$lt_CC
+
+# LTCC compiler flags.
+LTCFLAGS=$lt_CFLAGS
+
+# Take the output of nm and produce a listing of raw symbols and C names.
+global_symbol_pipe=$lt_lt_cv_sys_global_symbol_pipe
+
+# Transform the output of nm in a proper C declaration.
+global_symbol_to_cdecl=$lt_lt_cv_sys_global_symbol_to_cdecl
+
+# Transform the output of nm into a list of symbols to manually relocate.
+global_symbol_to_import=$lt_lt_cv_sys_global_symbol_to_import
+
+# Transform the output of nm in a C name address pair.
+global_symbol_to_c_name_address=$lt_lt_cv_sys_global_symbol_to_c_name_address
+
+# Transform the output of nm in a C name address pair when lib prefix is needed.
+global_symbol_to_c_name_address_lib_prefix=$lt_lt_cv_sys_global_symbol_to_c_name_address_lib_prefix
+
+# The name lister interface.
+nm_interface=$lt_lt_cv_nm_interface
+
+# Specify filename containing input files for \$NM.
+nm_file_list_spec=$lt_nm_file_list_spec
+
+# The root where to search for dependent libraries,and where our libraries should be installed.
+lt_sysroot=$lt_sysroot
+
+# Command to truncate a binary pipe.
+lt_truncate_bin=$lt_lt_cv_truncate_bin
+
+# The name of the directory that contains temporary libtool files.
+objdir=$objdir
+
+# Used to examine libraries when file_magic_cmd begins with "file".
+MAGIC_CMD=$MAGIC_CMD
+
+# Must we lock files when doing compilation?
+need_locks=$lt_need_locks
+
+# Manifest tool.
+MANIFEST_TOOL=$lt_MANIFEST_TOOL
+
+# Tool to manipulate archived DWARF debug symbol files on Mac OS X.
+DSYMUTIL=$lt_DSYMUTIL
+
+# Tool to change global to local symbols on Mac OS X.
+NMEDIT=$lt_NMEDIT
+
+# Tool to manipulate fat objects and archives on Mac OS X.
+LIPO=$lt_LIPO
+
+# ldd/readelf like tool for Mach-O binaries on Mac OS X.
+OTOOL=$lt_OTOOL
+
+# ldd/readelf like tool for 64 bit Mach-O binaries on Mac OS X 10.4.
+OTOOL64=$lt_OTOOL64
+
+# Old archive suffix (normally "a").
+libext=$libext
+
+# Shared library suffix (normally ".so").
+shrext_cmds=$lt_shrext_cmds
+
+# The commands to extract the exported symbol list from a shared archive.
+extract_expsyms_cmds=$lt_extract_expsyms_cmds
+
+# Variables whose values should be saved in libtool wrapper scripts and
+# restored at link time.
+variables_saved_for_relink=$lt_variables_saved_for_relink
+
+# Do we need the "lib" prefix for modules?
+need_lib_prefix=$need_lib_prefix
+
+# Do we need a version for libraries?
+need_version=$need_version
+
+# Library versioning type.
+version_type=$version_type
+
+# Shared library runtime path variable.
+runpath_var=$runpath_var
+
+# Shared library path variable.
+shlibpath_var=$shlibpath_var
+
+# Is shlibpath searched before the hard-coded library search path?
+shlibpath_overrides_runpath=$shlibpath_overrides_runpath
+
+# Format of library name prefix.
+libname_spec=$lt_libname_spec
+
+# List of archive names.  First name is the real one, the rest are links.
+# The last name is the one that the linker finds with -lNAME
+library_names_spec=$lt_library_names_spec
+
+# The coded name of the library, if different from the real name.
+soname_spec=$lt_soname_spec
+
+# Permission mode override for installation of shared libraries.
+install_override_mode=$lt_install_override_mode
+
+# Command to use after installation of a shared archive.
+postinstall_cmds=$lt_postinstall_cmds
+
+# Command to use after uninstallation of a shared archive.
+postuninstall_cmds=$lt_postuninstall_cmds
+
+# Commands used to finish a libtool library installation in a directory.
+finish_cmds=$lt_finish_cmds
+
+# As "finish_cmds", except a single script fragment to be evaled but
+# not shown.
+finish_eval=$lt_finish_eval
+
+# Whether we should hardcode library paths into libraries.
+hardcode_into_libs=$hardcode_into_libs
+
+# Compile-time system search path for libraries.
+sys_lib_search_path_spec=$lt_sys_lib_search_path_spec
+
+# Detected run-time system search path for libraries.
+sys_lib_dlsearch_path_spec=$lt_configure_time_dlsearch_path
+
+# Explicit LT_SYS_LIBRARY_PATH set during ./configure time.
+configure_time_lt_sys_library_path=$lt_configure_time_lt_sys_library_path
+
+# Whether dlopen is supported.
+dlopen_support=$enable_dlopen
+
+# Whether dlopen of programs is supported.
+dlopen_self=$enable_dlopen_self
+
+# Whether dlopen of statically linked programs is supported.
+dlopen_self_static=$enable_dlopen_self_static
+
+# Commands to strip libraries.
+old_striplib=$lt_old_striplib
+striplib=$lt_striplib
+
+
+# The linker used to build libraries.
+LD=$lt_LD
+
+# How to create reloadable object files.
+reload_flag=$lt_reload_flag
+reload_cmds=$lt_reload_cmds
+
+# Commands used to build an old-style archive.
+old_archive_cmds=$lt_old_archive_cmds
+
+# A language specific compiler.
+CC=$lt_compiler
+
+# Is the compiler the GNU compiler?
+with_gcc=$GCC
+
+# Compiler flag to turn off builtin functions.
+no_builtin_flag=$lt_lt_prog_compiler_no_builtin_flag
+
+# Additional compiler flags for building library objects.
+pic_flag=$lt_lt_prog_compiler_pic
+
+# How to pass a linker flag through the compiler.
+wl=$lt_lt_prog_compiler_wl
+
+# Compiler flag to prevent dynamic linking.
+link_static_flag=$lt_lt_prog_compiler_static
+
+# Does compiler simultaneously support -c and -o options?
+compiler_c_o=$lt_lt_cv_prog_compiler_c_o
+
+# Whether or not to add -lc for building shared libraries.
+build_libtool_need_lc=$archive_cmds_need_lc
+
+# Whether or not to disallow shared libs when runtime libs are static.
+allow_libtool_libs_with_static_runtimes=$enable_shared_with_static_runtimes
+
+# Compiler flag to allow reflexive dlopens.
+export_dynamic_flag_spec=$lt_export_dynamic_flag_spec
+
+# Compiler flag to generate shared objects directly from archives.
+whole_archive_flag_spec=$lt_whole_archive_flag_spec
+
+# Whether the compiler copes with passing no objects directly.
+compiler_needs_object=$lt_compiler_needs_object
+
+# Create an old-style archive from a shared archive.
+old_archive_from_new_cmds=$lt_old_archive_from_new_cmds
+
+# Create a temporary old-style archive to link instead of a shared archive.
+old_archive_from_expsyms_cmds=$lt_old_archive_from_expsyms_cmds
+
+# Commands used to build a shared archive.
+archive_cmds=$lt_archive_cmds
+archive_expsym_cmds=$lt_archive_expsym_cmds
+
+# Commands used to build a loadable module if different from building
+# a shared archive.
+module_cmds=$lt_module_cmds
+module_expsym_cmds=$lt_module_expsym_cmds
+
+# Whether we are building with GNU ld or not.
+with_gnu_ld=$lt_with_gnu_ld
+
+# Flag that allows shared libraries with undefined symbols to be built.
+allow_undefined_flag=$lt_allow_undefined_flag
+
+# Flag that enforces no undefined symbols.
+no_undefined_flag=$lt_no_undefined_flag
+
+# Flag to hardcode \$libdir into a binary during linking.
+# This must work even if \$libdir does not exist
+hardcode_libdir_flag_spec=$lt_hardcode_libdir_flag_spec
+
+# Whether we need a single "-rpath" flag with a separated argument.
+hardcode_libdir_separator=$lt_hardcode_libdir_separator
+
+# Set to "yes" if using DIR/libNAME\$shared_ext during linking hardcodes
+# DIR into the resulting binary.
+hardcode_direct=$hardcode_direct
+
+# Set to "yes" if using DIR/libNAME\$shared_ext during linking hardcodes
+# DIR into the resulting binary and the resulting library dependency is
+# "absolute",i.e impossible to change by setting \$shlibpath_var if the
+# library is relocated.
+hardcode_direct_absolute=$hardcode_direct_absolute
+
+# Set to "yes" if using the -LDIR flag during linking hardcodes DIR
+# into the resulting binary.
+hardcode_minus_L=$hardcode_minus_L
+
+# Set to "yes" if using SHLIBPATH_VAR=DIR during linking hardcodes DIR
+# into the resulting binary.
+hardcode_shlibpath_var=$hardcode_shlibpath_var
+
+# Set to "yes" if building a shared library automatically hardcodes DIR
+# into the library and all subsequent libraries and executables linked
+# against it.
+hardcode_automatic=$hardcode_automatic
+
+# Set to yes if linker adds runtime paths of dependent libraries
+# to runtime path list.
+inherit_rpath=$inherit_rpath
+
+# Whether libtool must link a program against all its dependency libraries.
+link_all_deplibs=$link_all_deplibs
+
+# Set to "yes" if exported symbols are required.
+always_export_symbols=$always_export_symbols
+
+# The commands to list exported symbols.
+export_symbols_cmds=$lt_export_symbols_cmds
+
+# Symbols that should not be listed in the preloaded symbols.
+exclude_expsyms=$lt_exclude_expsyms
+
+# Symbols that must always be exported.
+include_expsyms=$lt_include_expsyms
+
+# Commands necessary for linking programs (against libraries) with templates.
+prelink_cmds=$lt_prelink_cmds
+
+# Commands necessary for finishing linking programs.
+postlink_cmds=$lt_postlink_cmds
+
+# Specify filename containing input files.
+file_list_spec=$lt_file_list_spec
+
+# How to hardcode a shared library path into an executable.
+hardcode_action=$hardcode_action
+
+# The directories searched by this compiler when creating a shared library.
+compiler_lib_search_dirs=$lt_compiler_lib_search_dirs
+
+# Dependencies to place before and after the objects being linked to
+# create a shared library.
+predep_objects=$lt_predep_objects
+postdep_objects=$lt_postdep_objects
+predeps=$lt_predeps
+postdeps=$lt_postdeps
+
+# The library search path used internally by the compiler when linking
+# a shared library.
+compiler_lib_search_path=$lt_compiler_lib_search_path
+
+# ### END LIBTOOL CONFIG
+
+_LT_EOF
+
+    cat <<'_LT_EOF' >> "$cfgfile"
+
+# ### BEGIN FUNCTIONS SHARED WITH CONFIGURE
+
+# func_munge_path_list VARIABLE PATH
+# -----------------------------------
+# VARIABLE is name of variable containing _space_ separated list of
+# directories to be munged by the contents of PATH, which is string
+# having a format:
+# "DIR[:DIR]:"
+#       string "DIR[ DIR]" will be prepended to VARIABLE
+# ":DIR[:DIR]"
+#       string "DIR[ DIR]" will be appended to VARIABLE
+# "DIRP[:DIRP]::[DIRA:]DIRA"
+#       string "DIRP[ DIRP]" will be prepended to VARIABLE and string
+#       "DIRA[ DIRA]" will be appended to VARIABLE
+# "DIR[:DIR]"
+#       VARIABLE will be replaced by "DIR[ DIR]"
+func_munge_path_list ()
+{
+    case x$2 in
+    x)
+        ;;
+    *:)
+        eval $1=\"`$ECHO $2 | $SED 's/:/ /g'` \$$1\"
+        ;;
+    x:*)
+        eval $1=\"\$$1 `$ECHO $2 | $SED 's/:/ /g'`\"
+        ;;
+    *::*)
+        eval $1=\"\$$1\ `$ECHO $2 | $SED -e 's/.*:://' -e 's/:/ /g'`\"
+        eval $1=\"`$ECHO $2 | $SED -e 's/::.*//' -e 's/:/ /g'`\ \$$1\"
+        ;;
+    *)
+        eval $1=\"`$ECHO $2 | $SED 's/:/ /g'`\"
+        ;;
+    esac
+}
+
+
+# Calculate cc_basename.  Skip known compiler wrappers and cross-prefix.
+func_cc_basename ()
+{
+    for cc_temp in $*""; do
+      case $cc_temp in
+        compile | *[\\/]compile | ccache | *[\\/]ccache ) ;;
+        distcc | *[\\/]distcc | purify | *[\\/]purify ) ;;
+        \-*) ;;
+        *) break;;
+      esac
+    done
+    func_cc_basename_result=`$ECHO "$cc_temp" | $SED "s%.*/%%; s%^$host_alias-%%"`
+}
+
+
+# ### END FUNCTIONS SHARED WITH CONFIGURE
+
+_LT_EOF
+
+  case $host_os in
+  aix3*)
+    cat <<\_LT_EOF >> "$cfgfile"
+# AIX sometimes has problems with the GCC collect2 program.  For some
+# reason, if we set the COLLECT_NAMES environment variable, the problems
+# vanish in a puff of smoke.
+if test set != "${COLLECT_NAMES+set}"; then
+  COLLECT_NAMES=
+  export COLLECT_NAMES
+fi
+_LT_EOF
+    ;;
+  esac
+
+
+ltmain=$ac_aux_dir/ltmain.sh
+
+
+  # We use sed instead of cat because bash on DJGPP gets confused if
+  # if finds mixed CR/LF and LF-only lines.  Since sed operates in
+  # text mode, it properly converts lines to CR/LF.  This bash problem
+  # is reportedly fixed, but why not run on old versions too?
+  sed '$q' "$ltmain" >> "$cfgfile" \
+     || (rm -f "$cfgfile"; exit 1)
+
+   mv -f "$cfgfile" "$ofile" ||
+    (rm -f "$ofile" && cp "$cfgfile" "$ofile" && rm -f "$cfgfile")
+  chmod +x "$ofile"
+
+
+    cat <<_LT_EOF >> "$ofile"
+
+# ### BEGIN LIBTOOL TAG CONFIG: CXX
+
+# The linker used to build libraries.
+LD=$lt_LD_CXX
+
+# How to create reloadable object files.
+reload_flag=$lt_reload_flag_CXX
+reload_cmds=$lt_reload_cmds_CXX
+
+# Commands used to build an old-style archive.
+old_archive_cmds=$lt_old_archive_cmds_CXX
+
+# A language specific compiler.
+CC=$lt_compiler_CXX
+
+# Is the compiler the GNU compiler?
+with_gcc=$GCC_CXX
+
+# Compiler flag to turn off builtin functions.
+no_builtin_flag=$lt_lt_prog_compiler_no_builtin_flag_CXX
+
+# Additional compiler flags for building library objects.
+pic_flag=$lt_lt_prog_compiler_pic_CXX
+
+# How to pass a linker flag through the compiler.
+wl=$lt_lt_prog_compiler_wl_CXX
+
+# Compiler flag to prevent dynamic linking.
+link_static_flag=$lt_lt_prog_compiler_static_CXX
+
+# Does compiler simultaneously support -c and -o options?
+compiler_c_o=$lt_lt_cv_prog_compiler_c_o_CXX
+
+# Whether or not to add -lc for building shared libraries.
+build_libtool_need_lc=$archive_cmds_need_lc_CXX
+
+# Whether or not to disallow shared libs when runtime libs are static.
+allow_libtool_libs_with_static_runtimes=$enable_shared_with_static_runtimes_CXX
+
+# Compiler flag to allow reflexive dlopens.
+export_dynamic_flag_spec=$lt_export_dynamic_flag_spec_CXX
+
+# Compiler flag to generate shared objects directly from archives.
+whole_archive_flag_spec=$lt_whole_archive_flag_spec_CXX
+
+# Whether the compiler copes with passing no objects directly.
+compiler_needs_object=$lt_compiler_needs_object_CXX
+
+# Create an old-style archive from a shared archive.
+old_archive_from_new_cmds=$lt_old_archive_from_new_cmds_CXX
+
+# Create a temporary old-style archive to link instead of a shared archive.
+old_archive_from_expsyms_cmds=$lt_old_archive_from_expsyms_cmds_CXX
+
+# Commands used to build a shared archive.
+archive_cmds=$lt_archive_cmds_CXX
+archive_expsym_cmds=$lt_archive_expsym_cmds_CXX
+
+# Commands used to build a loadable module if different from building
+# a shared archive.
+module_cmds=$lt_module_cmds_CXX
+module_expsym_cmds=$lt_module_expsym_cmds_CXX
+
+# Whether we are building with GNU ld or not.
+with_gnu_ld=$lt_with_gnu_ld_CXX
+
+# Flag that allows shared libraries with undefined symbols to be built.
+allow_undefined_flag=$lt_allow_undefined_flag_CXX
+
+# Flag that enforces no undefined symbols.
+no_undefined_flag=$lt_no_undefined_flag_CXX
+
+# Flag to hardcode \$libdir into a binary during linking.
+# This must work even if \$libdir does not exist
+hardcode_libdir_flag_spec=$lt_hardcode_libdir_flag_spec_CXX
+
+# Whether we need a single "-rpath" flag with a separated argument.
+hardcode_libdir_separator=$lt_hardcode_libdir_separator_CXX
+
+# Set to "yes" if using DIR/libNAME\$shared_ext during linking hardcodes
+# DIR into the resulting binary.
+hardcode_direct=$hardcode_direct_CXX
+
+# Set to "yes" if using DIR/libNAME\$shared_ext during linking hardcodes
+# DIR into the resulting binary and the resulting library dependency is
+# "absolute",i.e impossible to change by setting \$shlibpath_var if the
+# library is relocated.
+hardcode_direct_absolute=$hardcode_direct_absolute_CXX
+
+# Set to "yes" if using the -LDIR flag during linking hardcodes DIR
+# into the resulting binary.
+hardcode_minus_L=$hardcode_minus_L_CXX
+
+# Set to "yes" if using SHLIBPATH_VAR=DIR during linking hardcodes DIR
+# into the resulting binary.
+hardcode_shlibpath_var=$hardcode_shlibpath_var_CXX
+
+# Set to "yes" if building a shared library automatically hardcodes DIR
+# into the library and all subsequent libraries and executables linked
+# against it.
+hardcode_automatic=$hardcode_automatic_CXX
+
+# Set to yes if linker adds runtime paths of dependent libraries
+# to runtime path list.
+inherit_rpath=$inherit_rpath_CXX
+
+# Whether libtool must link a program against all its dependency libraries.
+link_all_deplibs=$link_all_deplibs_CXX
+
+# Set to "yes" if exported symbols are required.
+always_export_symbols=$always_export_symbols_CXX
+
+# The commands to list exported symbols.
+export_symbols_cmds=$lt_export_symbols_cmds_CXX
+
+# Symbols that should not be listed in the preloaded symbols.
+exclude_expsyms=$lt_exclude_expsyms_CXX
+
+# Symbols that must always be exported.
+include_expsyms=$lt_include_expsyms_CXX
+
+# Commands necessary for linking programs (against libraries) with templates.
+prelink_cmds=$lt_prelink_cmds_CXX
+
+# Commands necessary for finishing linking programs.
+postlink_cmds=$lt_postlink_cmds_CXX
+
+# Specify filename containing input files.
+file_list_spec=$lt_file_list_spec_CXX
+
+# How to hardcode a shared library path into an executable.
+hardcode_action=$hardcode_action_CXX
+
+# The directories searched by this compiler when creating a shared library.
+compiler_lib_search_dirs=$lt_compiler_lib_search_dirs_CXX
+
+# Dependencies to place before and after the objects being linked to
+# create a shared library.
+predep_objects=$lt_predep_objects_CXX
+postdep_objects=$lt_postdep_objects_CXX
+predeps=$lt_predeps_CXX
+postdeps=$lt_postdeps_CXX
+
+# The library search path used internally by the compiler when linking
+# a shared library.
+compiler_lib_search_path=$lt_compiler_lib_search_path_CXX
+
+# ### END LIBTOOL TAG CONFIG: CXX
+_LT_EOF
+
+ ;;
+
+  esac
+done # for ac_tag
+
+
+as_fn_exit 0
+_ACEOF
+ac_clean_files=$ac_clean_files_save
+
+test $ac_write_fail = 0 ||
+  as_fn_error $? "write failure creating $CONFIG_STATUS" "$LINENO" 5
+
+
+# configure is writing to config.log, and then calls config.status.
+# config.status does its own redirection, appending to config.log.
+# Unfortunately, on DOS this fails, as config.log is still kept open
+# by configure, so config.status won't be able to write to it; its
+# output is simply discarded.  So we exec the FD to /dev/null,
+# effectively closing config.log, so it can be properly (re)opened and
+# appended to by config.status.  When coming back to configure, we
+# need to make the FD available again.
+if test "$no_create" != yes; then
+  ac_cs_success=:
+  ac_config_status_args=
+  test "$silent" = yes &&
+    ac_config_status_args="$ac_config_status_args --quiet"
+  exec 5>/dev/null
+  $SHELL $CONFIG_STATUS $ac_config_status_args || ac_cs_success=false
+  exec 5>>config.log
+  # Use ||, not &&, to avoid exiting from the if with $? = 1, which
+  # would make configure fail if this is the last instruction.
+  $ac_cs_success || as_fn_exit 1
+fi
+if test -n "$ac_unrecognized_opts" && test "$enable_option_checking" != no; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: unrecognized options: $ac_unrecognized_opts" >&5
+$as_echo "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2;}
+fi
+
diff --git a/src/third_party/unwind/dist/configure.ac b/src/third_party/unwind/dist/configure.ac
new file mode 100644
index 00000000000..dfe40146df1
--- /dev/null
+++ b/src/third_party/unwind/dist/configure.ac
@@ -0,0 +1,446 @@
+define(pkg_major, 1)
+define(pkg_minor, 4)
+define(pkg_extra, -rc1)
+define(pkg_maintainer, libunwind-devel@nongnu.org)
+define(mkvers, $1.$2$3)
+dnl Process this file with autoconf to produce a configure script.
+AC_INIT([libunwind],[mkvers(pkg_major, pkg_minor, pkg_extra)],[pkg_maintainer])
+AC_CONFIG_SRCDIR(src/mi/backtrace.c)
+AC_CONFIG_AUX_DIR(config)
+AC_CANONICAL_TARGET
+AM_INIT_AUTOMAKE([1.6 subdir-objects])
+AM_MAINTAINER_MODE
+AC_CONFIG_HEADERS([include/config.h])
+
+dnl Checks for programs.
+AC_PROG_CC
+AC_PROG_CXX
+AC_PROG_INSTALL
+AC_PROG_MAKE_SET
+m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
+LT_INIT
+AM_PROG_AS
+AM_PROG_CC_C_O
+
+dnl Checks for libraries.
+AC_CHECK_LIB(uca, __uc_get_grs)
+OLD_LIBS=${LIBS}
+AC_SEARCH_LIBS(dlopen, dl)
+LIBS=${OLD_LIBS}
+case "$ac_cv_search_dlopen" in
+  -l*) DLLIB=$ac_cv_search_dlopen;;
+  *) DLLIB="";;
+esac
+
+CHECK_ATOMIC_OPS
+
+dnl Checks for header files.
+AC_HEADER_STDC
+AC_CHECK_HEADERS(asm/ptrace_offsets.h endian.h sys/endian.h execinfo.h \
+		ia64intrin.h sys/uc_access.h unistd.h signal.h sys/types.h \
+		sys/procfs.h sys/ptrace.h byteswap.h elf.h sys/elf.h link.h sys/link.h)
+
+dnl Checks for typedefs, structures, and compiler characteristics.
+AC_C_CONST
+AC_C_INLINE
+AC_TYPE_SIZE_T
+AC_CHECK_SIZEOF(off_t)
+
+CPPFLAGS="${CPPFLAGS} -D_GNU_SOURCE"
+
+AC_CHECK_MEMBERS([struct dl_phdr_info.dlpi_subs],,,[#include <link.h>])
+AC_CHECK_TYPES([struct elf_prstatus, struct prstatus], [], [],
+[$ac_includes_default
+#if HAVE_SYS_PROCFS_H
+# include <sys/procfs.h>
+#endif
+])
+
+AC_CHECK_DECLS([PTRACE_POKEUSER, PTRACE_POKEDATA, PTRACE_SETREGSET,
+PTRACE_TRACEME, PTRACE_CONT, PTRACE_SINGLESTEP,
+PTRACE_SYSCALL, PT_IO, PT_GETREGS,
+PT_GETFPREGS, PT_CONTINUE, PT_TRACE_ME,
+PT_STEP, PT_SYSCALL], [], [],
+[$ac_includes_default
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#include <sys/ptrace.h>
+])
+
+dnl Checks for library functions.
+AC_CHECK_FUNCS(dl_iterate_phdr dl_phdr_removals_counter dlmodinfo getunwind \
+		ttrace mincore)
+
+AC_MSG_CHECKING([if building with AltiVec])
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+#ifndef __ALTIVEC__
+# error choke
+#endif
+]])], [use_altivec=yes],[use_altivec=no])
+AM_CONDITIONAL(USE_ALTIVEC, [test x$use_altivec = xyes])
+AC_MSG_RESULT([$use_altivec])
+
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+#ifndef __powerpc64__
+# error choke
+#endif
+]])], [ppc_bits=64], [ppc_bits=32])
+
+AC_DEFUN([SET_ARCH],[
+    AS_CASE([$1],
+        [aarch64*],[$2=aarch64],
+        [arm*],[$2=arm],
+        [i?86],[$2=x86],
+        [hppa*],[$2=hppa],
+        [mips*],[$2=mips],
+        [powerpc*],[$2=ppc$ppc_bits],
+        [sh*],[$2=sh],
+        [amd64],[$2=x86_64],
+        [tile*],[$2=tilegx],
+        [$2=$1])
+]) dnl SET_ARCH
+
+SET_ARCH([$build_cpu],[build_arch])
+SET_ARCH([$host_cpu],[host_arch])
+SET_ARCH([$target_cpu],[target_arch])
+
+# Check for Android
+AC_MSG_CHECKING([for Android])
+android="no"
+case "$host_os" in
+  *android*)
+    android="yes"
+    AC_MSG_RESULT([yes])
+    ;;
+  *)
+    AC_MSG_RESULT([no])
+    ;;
+esac
+
+AC_ARG_ENABLE(coredump,
+	AS_HELP_STRING([--enable-coredump],[building libunwind-coredump library]),,
+        [AS_CASE([$host_arch], [aarch64*|arm*|mips*|sh*|x86*|tile*], [enable_coredump=yes], [enable_coredump=no])]
+)
+
+AC_MSG_CHECKING([if we should build libunwind-coredump])
+AC_MSG_RESULT([$enable_coredump])
+
+AC_ARG_ENABLE(ptrace,
+	AS_HELP_STRING([--enable-ptrace],[building libunwind-ptrace library]),,
+        [AC_CHECK_HEADER([sys/ptrace.h], [enable_ptrace=yes], [enable_ptrace=no])]
+)
+
+AC_MSG_CHECKING([if we should build libunwind-ptrace])
+AC_MSG_RESULT([$enable_ptrace])
+
+AC_ARG_ENABLE(setjmp,
+	AS_HELP_STRING([--enable-setjmp],[building libunwind-setjmp library]),,
+        [AS_IF([test x$target_arch == x$host_arch], [enable_setjmp=yes], [enable_setjmp=no])]
+)
+
+AC_ARG_ENABLE(documentation,
+	AS_HELP_STRING([--disable-documentation],[Disable generating the man pages]),,
+	[enable_documentation=yes])
+
+AC_ARG_ENABLE(tests,
+ AS_HELP_STRING([--disable-tests],[Disable tests build]),,
+ [enable_tests=yes])
+
+AC_MSG_CHECKING([if we should build libunwind-setjmp])
+AC_MSG_RESULT([$enable_setjmp])
+
+AC_MSG_CHECKING([for build architecture])
+AC_MSG_RESULT([$build_arch])
+AC_MSG_CHECKING([for host architecture])
+AC_MSG_RESULT([$host_arch])
+AC_MSG_CHECKING([for target architecture])
+AC_MSG_RESULT([$target_arch])
+AC_MSG_CHECKING([for target operating system])
+AC_MSG_RESULT([$target_os])
+
+AM_CONDITIONAL(BUILD_COREDUMP, test x$enable_coredump = xyes)
+AM_CONDITIONAL(BUILD_PTRACE, test x$enable_ptrace = xyes)
+AM_CONDITIONAL(BUILD_SETJMP, test x$enable_setjmp = xyes)
+AM_CONDITIONAL(NO_PTRACE_TEST, test x$build_arch != x$host_arch)
+AM_CONDITIONAL(REMOTE_ONLY, test x$target_arch != x$host_arch)
+AM_CONDITIONAL(ARCH_AARCH64, test x$target_arch = xaarch64)
+AM_CONDITIONAL(ARCH_ARM, test x$target_arch = xarm)
+AM_CONDITIONAL(ARCH_IA64, test x$target_arch = xia64)
+AM_CONDITIONAL(ARCH_HPPA, test x$target_arch = xhppa)
+AM_CONDITIONAL(ARCH_MIPS, test x$target_arch = xmips)
+AM_CONDITIONAL(ARCH_X86, test x$target_arch = xx86)
+AM_CONDITIONAL(ARCH_X86_64, test x$target_arch = xx86_64)
+AM_CONDITIONAL(ARCH_PPC32, test x$target_arch = xppc32)
+AM_CONDITIONAL(ARCH_PPC64, test x$target_arch = xppc64)
+AM_CONDITIONAL(ARCH_SH, test x$target_arch = xsh)
+AM_CONDITIONAL(ARCH_TILEGX, test x$target_arch = xtilegx)
+AM_CONDITIONAL(ARCH_S390X, test x$target_arch = xs390x)
+AM_CONDITIONAL(OS_LINUX, expr x$target_os : xlinux >/dev/null)
+AM_CONDITIONAL(OS_HPUX, expr x$target_os : xhpux >/dev/null)
+AM_CONDITIONAL(OS_FREEBSD, expr x$target_os : xfreebsd >/dev/null)
+AM_CONDITIONAL(OS_QNX, expr x$target_os : xnto-qnx >/dev/null)
+
+AC_MSG_CHECKING([for ELF helper width])
+case "${target_arch}" in
+(arm|hppa|ppc32|x86|sh) use_elf32=yes; AC_MSG_RESULT([32]);;
+(aarch64|ia64|ppc64|x86_64|s390x|tilegx)  use_elf64=yes; AC_MSG_RESULT([64]);;
+(mips)                 use_elfxx=yes; AC_MSG_RESULT([xx]);;
+*)                     AC_MSG_ERROR([Unknown ELF target: ${target_arch}])
+esac
+AM_CONDITIONAL(USE_ELF32, [test x$use_elf32 = xyes])
+AM_CONDITIONAL(USE_ELF64, [test x$use_elf64 = xyes])
+AM_CONDITIONAL(USE_ELFXX, [test x$use_elfxx = xyes])
+
+AC_MSG_CHECKING([whether to include DWARF support])
+if test x$target_arch != xia64; then
+  use_dwarf=yes
+else
+  use_dwarf=no
+fi
+AM_CONDITIONAL(USE_DWARF, [test x$use_dwarf = xyes])
+AC_MSG_RESULT([$use_dwarf])
+
+if test x$target_arch = xppc64; then
+        libdir='${exec_prefix}/lib64'
+        AC_MSG_NOTICE([PowerPC64 detected, lib will be installed ${libdir}]);
+        AC_SUBST([libdir])
+fi
+
+AC_MSG_CHECKING([whether to restrict build to remote support])
+if test x$target_arch != x$host_arch; then
+  CPPFLAGS="${CPPFLAGS} -DUNW_REMOTE_ONLY"
+  remote_only=yes
+else
+  remote_only=no
+fi
+AC_MSG_RESULT([$remote_only])
+
+AC_MSG_CHECKING([whether to enable debug support])
+AC_ARG_ENABLE(debug,
+AS_HELP_STRING([--enable-debug],[turn on debug support (slows down execution)]))
+if test x$enable_debug = xyes; then
+  CPPFLAGS="${CPPFLAGS} -DDEBUG"
+else
+  CPPFLAGS="${CPPFLAGS} -DNDEBUG"
+fi
+AC_MSG_RESULT([$enable_debug])
+
+AC_MSG_CHECKING([whether to enable C++ exception support])
+AC_ARG_ENABLE(cxx_exceptions,
+AS_HELP_STRING([--enable-cxx-exceptions],[use libunwind to handle C++ exceptions]),,
+[
+# C++ exception handling doesn't work too well on x86
+case $target_arch in
+  x86*) enable_cxx_exceptions=no;;
+  aarch64*) enable_cxx_exceptions=no;;
+  arm*) enable_cxx_exceptions=no;;
+  mips*) enable_cxx_exceptions=no;;
+  tile*) enable_cxx_exceptions=no;;
+  *) enable_cxx_exceptions=yes;;
+esac
+])
+
+AM_CONDITIONAL([SUPPORT_CXX_EXCEPTIONS], [test x$enable_cxx_exceptions = xyes])
+AC_MSG_RESULT([$enable_cxx_exceptions])
+
+AC_MSG_CHECKING([whether to load .debug_frame sections])
+AC_ARG_ENABLE(debug_frame,
+AS_HELP_STRING([--enable-debug-frame],[Load the ".debug_frame" section if available]),, [
+case "${target_arch}" in
+  (arm) enable_debug_frame=yes;;
+  (aarch64) enable_debug_frame=yes;;
+  (*)   enable_debug_frame=no;;
+esac])
+if test x$enable_debug_frame = xyes; then
+  AC_DEFINE([CONFIG_DEBUG_FRAME], [], [Enable Debug Frame])
+fi
+AC_MSG_RESULT([$enable_debug_frame])
+
+AC_MSG_CHECKING([whether to block signals during mutex ops])
+AC_ARG_ENABLE(block_signals,
+AS_HELP_STRING([--enable-block-signals],[Block signals before performing mutex operations]),,
+[enable_block_signals=yes])
+if test x$enable_block_signals = xyes; then
+  AC_DEFINE([CONFIG_BLOCK_SIGNALS], [], [Block signals before mutex operations])
+fi
+AC_MSG_RESULT([$enable_block_signals])
+
+AC_MSG_CHECKING([whether to validate memory addresses before use])
+AC_ARG_ENABLE(conservative_checks,
+AS_HELP_STRING([--enable-conservative-checks],[Validate all memory addresses before use]),,
+[enable_conservative_checks=yes])
+if test x$enable_conservative_checks = xyes; then
+  AC_DEFINE(CONSERVATIVE_CHECKS, 1,
+	[Define to 1 if you want every memory access validated])
+fi
+AC_MSG_RESULT([$enable_conservative_checks])
+
+AC_MSG_CHECKING([whether to enable msabi support])
+AC_ARG_ENABLE(msabi_support,
+AS_HELP_STRING([--enable-msabi-support],[Enables support for Microsoft ABI extensions]))
+if test x$enable_msabi_support = xyes; then
+  AC_DEFINE([CONFIG_MSABI_SUPPORT], [], [Support for Microsoft ABI extensions])
+fi
+AC_MSG_RESULT([$enable_msabi_support])
+
+LIBLZMA=
+AC_MSG_CHECKING([whether to support LZMA-compressed symbol tables])
+AC_ARG_ENABLE(minidebuginfo,
+AS_HELP_STRING([--enable-minidebuginfo], [Enables support for LZMA-compressed symbol tables]),, [enable_minidebuginfo=auto])
+AC_MSG_RESULT([$enable_minidebuginfo])
+if test x$enable_minidebuginfo != xno; then
+   AC_CHECK_LIB([lzma], [lzma_mf_is_supported],
+   [LIBLZMA=-llzma
+    AC_DEFINE([HAVE_LZMA], [1], [Define if you have liblzma])
+    enable_minidebuginfo=yes],
+   [if test x$enable_minidebuginfo = xyes; then
+      AC_MSG_FAILURE([liblzma not found])
+    fi])
+fi
+AC_SUBST([LIBLZMA])
+AM_CONDITIONAL(HAVE_LZMA, test x$enable_minidebuginfo = xyes)
+
+AC_MSG_CHECKING([whether to support UNW_CACHE_PER_THREAD])
+AC_ARG_ENABLE([per-thread-cache],
+AS_HELP_STRING([--enable-per-thread-cache], [build with support for UNW_CACHE_PER_THREAD (which imposes a hight TLS memory usage) (default: disabled)]))
+AC_MSG_RESULT([$enable_per_thread_cache])
+AS_IF([test x$enable_per_thread_cache = xyes], [
+  LIBUNWIND___THREAD
+  AS_IF([test x$libc_cv_gcc___thread = xno], [
+    AC_MSG_FAILURE([UNW_CACHE_PER_THREAD requires __thread])
+  ])
+])
+
+AC_MSG_CHECKING([for Intel compiler])
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[#ifndef __INTEL_COMPILER
+#error choke me
+#endif]])],[intel_compiler=yes],[intel_compiler=no])
+
+if test x$GCC = xyes -a x$intel_compiler != xyes; then
+  CFLAGS="${CFLAGS} -fexceptions -Wall -Wsign-compare"
+fi
+AC_MSG_RESULT([$intel_compiler])
+
+AC_MSG_CHECKING([for QCC compiler])
+AS_CASE([$CC], [qcc*|QCC*], [qcc_compiler=yes], [qcc_compiler=no])
+AC_MSG_RESULT([$qcc_compiler])
+
+if test x$intel_compiler = xyes; then
+  AC_MSG_CHECKING([if linker supports -static-libcxa])
+  save_LDFLAGS="$LDFLAGS"
+  LDFLAGS="$LDFLAGS -static-libcxa"
+  AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[]])],[have_static_libcxa=yes],[have_static_libcxa=no])
+  LDFLAGS="$save_LDFLAGS"
+  if test "x$have_static_libcxa" = xyes; then
+    LDFLAGS_STATIC_LIBCXA="-XCClinker -static-libcxa"
+  fi
+  AC_MSG_RESULT([$have_static_libcxa])
+fi
+
+if test x$qcc_compiler = xyes; then
+    LDFLAGS_NOSTARTFILES="-XCClinker -Wc,-nostartfiles"
+else
+    LDFLAGS_NOSTARTFILES="-XCClinker -nostartfiles"
+fi
+
+if test x$GCC = xyes -a x$intel_compiler != xyes -a x$qcc_compiler != xyes -a x$android != xyes; then
+  LIBCRTS="-lgcc_s"
+fi
+
+AC_MSG_CHECKING([for __builtin___clear_cache])
+AC_LINK_IFELSE(
+  [AC_LANG_PROGRAM([[]], [[__builtin___clear_cache(0, 0)]])],
+  [have__builtin___clear_cache=yes],
+  [have__builtin___clear_cache=no])
+if test x$have__builtin___clear_cache = xyes; then
+  AC_DEFINE([HAVE__BUILTIN___CLEAR_CACHE], [1],
+            [Defined if __builtin___clear_cache() is available])
+fi
+AC_MSG_RESULT([$have__builtin___clear_cache])
+
+AC_MSG_CHECKING([for __builtin_unreachable])
+AC_LINK_IFELSE(
+  [AC_LANG_PROGRAM([[]], [[__builtin_unreachable()]])],
+  [have__builtin_unreachable=yes],
+  [have__builtin_unreachable=no])
+if test x$have__builtin_unreachable = xyes; then
+  AC_DEFINE([HAVE__BUILTIN_UNREACHABLE], [1],
+            [Defined if __builtin_unreachable() is available])
+fi
+AC_MSG_RESULT([$have__builtin_unreachable])
+
+AC_MSG_CHECKING([for __sync atomics])
+AC_LINK_IFELSE(
+  [AC_LANG_PROGRAM([[]], [[
+    __sync_bool_compare_and_swap((int *)0, 0, 1);
+    __sync_fetch_and_add((int *)0, 1);
+    ]])],
+  [have_sync_atomics=yes],
+  [have_sync_atomics=no])
+if test x$have_sync_atomics = xyes; then
+  AC_DEFINE([HAVE_SYNC_ATOMICS], [1],
+            [Defined if __sync atomics are available])
+fi
+AC_MSG_RESULT([$have_sync_atomics])
+
+CCASFLAGS="${CCASFLAGS} ${CPPFLAGS}"
+
+arch="$target_arch"
+ARCH=`echo $target_arch | tr [a-z] [A-Z]`
+
+dnl create shell variables from the M4 macros:
+PKG_MAJOR=pkg_major
+PKG_MINOR=pkg_minor
+PKG_EXTRA=pkg_extra
+PKG_MAINTAINER=pkg_maintainer
+
+old_LIBS="$LIBS"
+LIBS=""
+AC_SEARCH_LIBS(backtrace, execinfo)
+LIBS="$old_LIBS"
+case "$ac_cv_search_backtrace" in
+  -l*) BACKTRACELIB=$ac_cv_search_backtrace;;
+  *) BACKTRACELIB="";;
+esac
+
+
+AC_SUBST(build_arch)
+AC_SUBST(target_os)
+AC_SUBST(arch)
+AC_SUBST(ARCH)
+AC_SUBST(LDFLAGS_STATIC_LIBCXA)
+AC_SUBST(LDFLAGS_NOSTARTFILES)
+AC_SUBST(LIBCRTS)
+AC_SUBST(PKG_MAJOR)
+AC_SUBST(PKG_MINOR)
+AC_SUBST(PKG_EXTRA)
+AC_SUBST(PKG_MAINTAINER)
+AC_SUBST(enable_cxx_exceptions)
+AC_SUBST(enable_debug_frame)
+AC_SUBST(DLLIB)
+AC_SUBST(BACKTRACELIB)
+
+AC_PATH_PROG([LATEX2MAN],[latex2man])
+if test "x$LATEX2MAN" = "x"; then
+  AC_MSG_WARN([latex2man not found. Install latex2man. Disabling docs.])
+  enable_documentation="no";
+fi
+
+AM_CONDITIONAL([CONFIG_DOCS], [test x$enable_documentation = xyes])
+if test "x$enable_documentation" = "xyes"; then
+  AC_CONFIG_FILES(doc/Makefile doc/common.tex)
+fi
+
+AM_CONDITIONAL([CONFIG_TESTS], [test x$enable_tests = xyes])
+if test "x$enable_tests" = "xyes"; then
+  AC_CONFIG_FILES(tests/Makefile tests/check-namespace.sh)
+fi
+
+AC_CONFIG_FILES(Makefile src/Makefile
+                include/libunwind-common.h
+                include/libunwind.h include/tdep/libunwind_i.h)
+AC_CONFIG_FILES(src/unwind/libunwind.pc src/coredump/libunwind-coredump.pc
+                src/ptrace/libunwind-ptrace.pc src/setjmp/libunwind-setjmp.pc
+                src/libunwind-generic.pc)
+AC_OUTPUT
diff --git a/src/third_party/unwind/dist/doc/Makefile.am b/src/third_party/unwind/dist/doc/Makefile.am
new file mode 100644
index 00000000000..bfe46691245
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/Makefile.am
@@ -0,0 +1,80 @@
+# man pages that go into section 3:
+man3_MANS = libunwind.man libunwind-dynamic.man libunwind-ia64.man	\
+	libunwind-ptrace.man libunwind-setjmp.man			\
+	unw_apply_reg_state.man						\
+	unw_backtrace.man						\
+	unw_flush_cache.man						\
+	unw_get_accessors.man						\
+	unw_get_proc_info.man						\
+	unw_get_proc_info_by_ip.man					\
+	unw_get_proc_name.man						\
+	unw_get_fpreg.man						\
+	unw_get_reg.man							\
+	unw_getcontext.man						\
+	unw_init_local.man unw_init_remote.man				\
+	unw_init_local2.man						\
+	unw_is_fpreg.man						\
+	unw_is_signal_frame.man						\
+	unw_create_addr_space.man					\
+	unw_destroy_addr_space.man					\
+	unw_regname.man unw_resume.man					\
+	unw_reg_states_iterate.man					\
+	unw_set_caching_policy.man					\
+	unw_set_cache_size.man						\
+	unw_set_fpreg.man						\
+	unw_set_reg.man							\
+	unw_step.man							\
+	unw_strerror.man						\
+	_U_dyn_register.man						\
+	_U_dyn_cancel.man
+
+EXTRA_DIST = NOTES libunwind.trans					\
+	libunwind.tex libunwind-dynamic.tex libunwind-ia64.tex		\
+	libunwind-ptrace.tex libunwind-setjmp.tex			\
+	unw_apply_reg_state.tex						\
+	unw_backtrace.tex						\
+	unw_flush_cache.tex						\
+	unw_get_accessors.tex						\
+	unw_get_proc_info.tex						\
+	unw_get_proc_info_by_ip.tex					\
+	unw_get_proc_name.tex						\
+	unw_get_fpreg.tex						\
+	unw_get_reg.tex							\
+	unw_getcontext.tex						\
+	unw_init_local.tex unw_init_remote.tex				\
+	unw_is_fpreg.tex						\
+	unw_is_signal_frame.tex						\
+	unw_create_addr_space.tex unw_destroy_addr_space.tex		\
+	unw_regname.tex unw_resume.tex unw_set_caching_policy.tex	\
+	unw_reg_states_iterate.tex					\
+	unw_set_cache_size.tex						\
+	unw_set_fpreg.tex						\
+	unw_set_reg.tex							\
+	unw_step.tex							\
+	unw_strerror.tex						\
+	_U_dyn_register.tex						\
+	_U_dyn_cancel.tex						\
+	$(man3_MANS)
+
+L2M	= latex2man
+L2P	= pdflatex
+L2M_CMD	= $(L2M) -t $(srcdir)/libunwind.trans
+L2H_CMD	= $(L2M) -H -t $(srcdir)/libunwind.trans
+
+.tex.man:
+	$(L2M_CMD) $< $@
+	-cp $@ $(srcdir)/$@
+
+html:
+	for n in $(man3_MANS); do					\
+		page=`basename $$n .man`;				\
+		$(L2H_CMD) $(srcdir)/$$page.tex "$$page(3).raw";	\
+	done
+
+pdf:
+	for n in $(man3_MANS); do					\
+		page=`basename $$n .man`;				\
+		$(L2P) $(srcdir)/$$page.tex "$$page(3).pdf";		\
+	done
+
+MAINTAINERCLEANFILES = Makefile.in
diff --git a/src/third_party/unwind/dist/doc/Makefile.in b/src/third_party/unwind/dist/doc/Makefile.in
new file mode 100644
index 00000000000..858f9bf5e3b
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/Makefile.in
@@ -0,0 +1,621 @@
+# Makefile.in generated by automake 1.15.1 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2017 Free Software Foundation, Inc.
+
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+VPATH = @srcdir@
+am__is_gnu_make = { \
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+    false; \
+  elif test -n '$(MAKE_HOST)'; then \
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+    true; \
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+  fi; \
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+target_vendor = @target_vendor@
+top_build_prefix = @top_build_prefix@
+top_builddir = @top_builddir@
+top_srcdir = @top_srcdir@
+
+# man pages that go into section 3:
+man3_MANS = libunwind.man libunwind-dynamic.man libunwind-ia64.man	\
+	libunwind-ptrace.man libunwind-setjmp.man			\
+	unw_apply_reg_state.man						\
+	unw_backtrace.man						\
+	unw_flush_cache.man						\
+	unw_get_accessors.man						\
+	unw_get_proc_info.man						\
+	unw_get_proc_info_by_ip.man					\
+	unw_get_proc_name.man						\
+	unw_get_fpreg.man						\
+	unw_get_reg.man							\
+	unw_getcontext.man						\
+	unw_init_local.man unw_init_remote.man				\
+	unw_init_local2.man						\
+	unw_is_fpreg.man						\
+	unw_is_signal_frame.man						\
+	unw_create_addr_space.man					\
+	unw_destroy_addr_space.man					\
+	unw_regname.man unw_resume.man					\
+	unw_reg_states_iterate.man					\
+	unw_set_caching_policy.man					\
+	unw_set_cache_size.man						\
+	unw_set_fpreg.man						\
+	unw_set_reg.man							\
+	unw_step.man							\
+	unw_strerror.man						\
+	_U_dyn_register.man						\
+	_U_dyn_cancel.man
+
+EXTRA_DIST = NOTES libunwind.trans					\
+	libunwind.tex libunwind-dynamic.tex libunwind-ia64.tex		\
+	libunwind-ptrace.tex libunwind-setjmp.tex			\
+	unw_apply_reg_state.tex						\
+	unw_backtrace.tex						\
+	unw_flush_cache.tex						\
+	unw_get_accessors.tex						\
+	unw_get_proc_info.tex						\
+	unw_get_proc_info_by_ip.tex					\
+	unw_get_proc_name.tex						\
+	unw_get_fpreg.tex						\
+	unw_get_reg.tex							\
+	unw_getcontext.tex						\
+	unw_init_local.tex unw_init_remote.tex				\
+	unw_is_fpreg.tex						\
+	unw_is_signal_frame.tex						\
+	unw_create_addr_space.tex unw_destroy_addr_space.tex		\
+	unw_regname.tex unw_resume.tex unw_set_caching_policy.tex	\
+	unw_reg_states_iterate.tex					\
+	unw_set_cache_size.tex						\
+	unw_set_fpreg.tex						\
+	unw_set_reg.tex							\
+	unw_step.tex							\
+	unw_strerror.tex						\
+	_U_dyn_register.tex						\
+	_U_dyn_cancel.tex						\
+	$(man3_MANS)
+
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+maintainer-clean-generic:
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+	distclean-libtool distdir dvi dvi-am html html-am info info-am \
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+	$(L2M_CMD) $< $@
+	-cp $@ $(srcdir)/$@
+
+html:
+	for n in $(man3_MANS); do					\
+		page=`basename $$n .man`;				\
+		$(L2H_CMD) $(srcdir)/$$page.tex "$$page(3).raw";	\
+	done
+
+pdf:
+	for n in $(man3_MANS); do					\
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+		$(L2P) $(srcdir)/$$page.tex "$$page(3).pdf";		\
+	done
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/third_party/unwind/dist/doc/NOTES b/src/third_party/unwind/dist/doc/NOTES
new file mode 100644
index 00000000000..3f3caa95bb5
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/NOTES
@@ -0,0 +1,127 @@
+The central data structure of the unwind API is the unwind cursor.
+This structure tracks the register contents.  The unwind API defines a
+handful of well-known frame "registers":
+
+        - ip: the instruction pointer (pc)
+        - rp: the return pointer (rp, aka "return address" or "return link")
+        - sp: the stack pointer (memory stack pointer, in the case of ia64)
+        - fp: the frame pointer
+        - first_ip: the starting address of the current "procedure"
+        - handler: a pointer to an architecture & language-specific
+          "personality" routine
+        - lsda: a pointer to an architecture & language-specific
+          data-area
+
+The API defines no well-known preserved registers.  Each architecture
+can define additional registers as needed.  Of course, a portable
+application may only rely on well-known registers.  The names for
+preserved registers are defined in the architecture-specific header
+file <unwind-ARCH.h>.  For example, to get the IA-64-specific register
+names, an application would do:
+
+	#include <unwind-ia64.h>
+
+The API is designed to handle two primary cases: unwinding within the
+current (local) process and unwinding of another ("remote") process
+(e.g., through ptrace()).  In the local case, the initial machine
+state is captured by an unwind context (currently the same as
+ucontext_t).  In the remote case, the initial machine state is
+captured by an unwind accessor structure, which provides callback
+routines for reading/writing memory and registers and for obtaining
+unwind information.
+
+Once a cursor has been initialized, you can step through the call
+chain with the unw_step() routine.  The frame registers and the
+preserved state can then be accessed with unw_get_reg() or modified
+with unw_set_reg().  For floating-point registers, there are separate
+unw_get_fpreg() and unw_set_fpreg() routines (on some arches, e.g.,
+Alpha, these could be just aliases for unw_{g,s}et_reg()).  The
+unw_resume() routine can be used to resume execution at an arbitrary
+point in the call-chain (as identified by an unwind cursor).  This is
+intended for exception handling and, at least for now, the intention
+is to support this routine only for the local case.  Kevin, if you
+feel gdb could benefit from such a routine, I'd be interested to hear
+about it.
+
+Note that it is perfectly legal to make copies of the unwind cursor.
+This makes it possible, e.g., to obtain an unwind context, modify the
+state in an earlier call frame, and then resume execution at the point
+at which the unwind context was captured.
+
+Here is a quick example of how to use the unwind API to do a simple
+stack trace:
+
+    unw_cursor_t cursor;
+    unw_word_t ip, sp;
+    unw_context_t uc;
+
+    unw_getcontext(&uc);
+    unw_init_local(&cursor, &uc);
+    do
+      {
+        unw_get_reg(&cursor, UNW_REG_IP, &ip);
+        unw_get_reg(&cursor, UNW_REG_SP, &sp);
+        printf ("ip=%016lx sp=%016lx\n", ip, sp);
+      }
+    while (unw_step (&cursor) > 0);
+
+Note that this particular example should work on pretty much any
+architecture, as it doesn't rely on any arch-specific registers.
+
+* Multiarchitecture support
+
+If libunwind is configured for a target other than the local (native)
+host, the library is installed as libunwind-$ARCH, where $ARCH is
+the target architecture name (e.g., ia32, ia64, or alpha).  Similarly,
+the header file is installed as libunwind-$ARCH.
+
+With this setup, an application should:
+
+	- include <libunwind.h>, and
+	- link against -lunwind
+
+if the application needs to use the unwinder of the host.  An
+application wanting to use the unwinder for a different target (e.g.,
+a cross-debugger) should:
+
+	- include <libunwind-$ARCH.h>, and
+	- link against -lunwind-$ARCH
+
+The global symbols exported by -lunwind-$ARCH are unique such that the
+same application can be linked against the separate unwind libraries
+of multiple targets.  However, a single compilation unit can include
+the header file for only one target.  For example, foo.c might include
+<libunwind-ia64.h> and bar.c might include <libunwind.h> and the
+entire application would have to be linked against both -lunwind and
+-lunwind-ia64.
+
+Note: the unwind header files of all targets have a common dependency
+on libunwind-common.h.  To avoid version conflicts, it is necessary to
+ensure that the unwind libraries for all targets were derived from the
+same release of libunwind.  That is, if the unwind library for one
+target is upgraded to a newer version, the libraries for all other
+targets also need to be upgraded.
+
+Note 2: The assumption is that a cross-unwinder can handle all
+interesting flavors of a target.  For example, the unwinder for the
+ia64 target is expected to be able to handle both Linux and HP-UX.
+
+* IA-64 Specific Information
+
+Apart from the normal frame-registers, the IA-64 implementation of
+libunwind provides the means to access the current value of the
+register backing store pointer (bsp).  One quirk with this
+frame-register is that it corresponds to the address that would be in
+register ar.bsp after flushing the current register stack to the
+backing store (i.e., as if a "flushrs" instruction had been executed).
+Of course, given this value and the contents of the current frame
+marker (CFM), it's easy to calculate the original value of ar.bsp:
+
+	unw_word_t cfm, bsp, bsp_after_flushrs, sof;
+
+	unw_get_reg (&cursor, UNW_IA64_BSP, &bsp_after_flushrs);
+	unw_get_reg (&cursor, UNW_IA64_CFM, &cfm);
+	bsp = ia64_rse_skip_regs (bsp_after_flushrs, -(cfm & 0x7f));
+
+** Dynamic Unwind Info
+
diff --git a/src/third_party/unwind/dist/doc/_U_dyn_cancel.man b/src/third_party/unwind/dist/doc/_U_dyn_cancel.man
new file mode 100644
index 00000000000..a420a6deaf3
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/_U_dyn_cancel.man
@@ -0,0 +1,66 @@
+'\" t
+.\" Manual page created with latex2man on Thu Aug 16 09:44:45 MDT 2007
+.\" NOTE: This file is generated, DO NOT EDIT.
+.de Vb
+.ft CW
+.nf
+..
+.de Ve
+.ft R
+
+.fi
+..
+.TH "\\_U\\_DYN\\_CANCEL" "3" "16 August 2007" "Programming Library " "Programming Library "
+.SH NAME
+_U_dyn_cancel
+\-\- cancel unwind\-info for dynamically generated code 
+.PP
+.SH SYNOPSIS
+
+.PP
+#include <libunwind.h>
+.br
+.PP
+void
+_U_dyn_cancel(unw_dyn_info_t *di);
+.br
+.PP
+.SH DESCRIPTION
+
+.PP
+The _U_dyn_cancel()
+routine cancels the registration of the 
+unwind\-info for a dynamically generated procedure. Argument di
+is the pointer to the unw_dyn_info_t
+structure that 
+describes the procedure\&'s unwind\-info. 
+.PP
+The _U_dyn_cancel()
+routine is guaranteed to execute in 
+constant time (in the absence of contention from concurrent calls to 
+_U_dyn_register()
+or _U_dyn_cancel()).
+.PP
+.SH THREAD AND SIGNAL SAFETY
+
+.PP
+_U_dyn_cancel()
+is thread\-safe but \fInot\fP
+safe to use 
+from a signal handler. 
+.PP
+.SH SEE ALSO
+
+.PP
+libunwind\-dynamic(3),
+_U_dyn_register(3)
+.PP
+.SH AUTHOR
+
+.PP
+David Mosberger\-Tang
+.br
+Email: \fBdmosberger@gmail.com\fP
+.br
+WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
+.\" NOTE: This file is generated, DO NOT EDIT.
diff --git a/src/third_party/unwind/dist/doc/_U_dyn_cancel.tex b/src/third_party/unwind/dist/doc/_U_dyn_cancel.tex
new file mode 100644
index 00000000000..ca5a12a76ee
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/_U_dyn_cancel.tex
@@ -0,0 +1,46 @@
+\documentclass{article}
+\usepackage[fancyhdr,pdf]{latex2man}
+
+\input{common.tex}
+
+\begin{document}
+
+\begin{Name}{3}{\_U\_dyn\_cancel}{David Mosberger-Tang}{Programming Library}{\_U\_dyn\_cancel}\_U\_dyn\_cancel -- cancel unwind-info for dynamically generated code
+\end{Name}
+
+\section{Synopsis}
+
+\File{\#include $<$libunwind.h$>$}\\
+
+\Type{void} \Func{\_U\_dyn\_cancel}(\Type{unw\_dyn\_info\_t~*}\Var{di});\\
+
+\section{Description}
+
+The \Func{\_U\_dyn\_cancel}() routine cancels the registration of the
+unwind-info for a dynamically generated procedure.  Argument \Var{di}
+is the pointer to the \Type{unw\_dyn\_info\_t} structure that
+describes the procedure's unwind-info.
+
+The \Func{\_U\_dyn\_cancel}() routine is guaranteed to execute in
+constant time (in the absence of contention from concurrent calls to
+\Func{\_U\_dyn\_register}() or \Func{\_U\_dyn\_cancel}()).
+
+
+\section{Thread and Signal Safety}
+
+\Func{\_U\_dyn\_cancel}() is thread-safe but \emph{not} safe to use
+from a signal handler.
+
+\section{See Also}
+
+\SeeAlso{libunwind-dynamic(3)}, \SeeAlso{\_U\_dyn\_register(3)}
+
+\section{Author}
+
+\noindent
+David Mosberger-Tang\\
+Email: \Email{dmosberger@gmail.com}\\
+WWW: \URL{http://www.nongnu.org/libunwind/}.
+\LatexManEnd
+
+\end{document}
diff --git a/src/third_party/unwind/dist/doc/_U_dyn_register.man b/src/third_party/unwind/dist/doc/_U_dyn_register.man
new file mode 100644
index 00000000000..107e5fd0e18
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/_U_dyn_register.man
@@ -0,0 +1,68 @@
+'\" t
+.\" Manual page created with latex2man on Thu Aug 16 09:44:45 MDT 2007
+.\" NOTE: This file is generated, DO NOT EDIT.
+.de Vb
+.ft CW
+.nf
+..
+.de Ve
+.ft R
+
+.fi
+..
+.TH "\\_U\\_DYN\\_REGISTER" "3" "16 August 2007" "Programming Library " "Programming Library "
+.SH NAME
+_U_dyn_register
+\-\- register unwind\-info for dynamically generated code 
+.PP
+.SH SYNOPSIS
+
+.PP
+#include <libunwind.h>
+.br
+.PP
+void
+_U_dyn_register(unw_dyn_info_t *di);
+.br
+.PP
+.SH DESCRIPTION
+
+.PP
+The _U_dyn_register()
+routine registers unwind\-info for a 
+dynamically generated procedure. The procedure\&'s unwind\-info is 
+described by a structure of type unw_dyn_info_t
+(see 
+libunwind\-dynamic(3)).
+A pointer to this structure is 
+passed in argument di\&.
+.PP
+The _U_dyn_register()
+routine is guaranteed to execute in 
+constant time (in the absence of contention from concurrent calls to 
+_U_dyn_register()
+or _U_dyn_cancel()).
+.PP
+.SH THREAD AND SIGNAL SAFETY
+
+.PP
+_U_dyn_register()
+is thread\-safe but \fInot\fP
+safe to use 
+from a signal handler. 
+.PP
+.SH SEE ALSO
+
+.PP
+libunwind\-dynamic(3),
+_U_dyn_cancel(3)
+.PP
+.SH AUTHOR
+
+.PP
+David Mosberger\-Tang
+.br
+Email: \fBdmosberger@gmail.com\fP
+.br
+WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
+.\" NOTE: This file is generated, DO NOT EDIT.
diff --git a/src/third_party/unwind/dist/doc/_U_dyn_register.tex b/src/third_party/unwind/dist/doc/_U_dyn_register.tex
new file mode 100644
index 00000000000..ab23b5c6213
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/_U_dyn_register.tex
@@ -0,0 +1,47 @@
+\documentclass{article}
+\usepackage[fancyhdr,pdf]{latex2man}
+
+\input{common.tex}
+
+\begin{document}
+
+\begin{Name}{3}{\_U\_dyn\_register}{David Mosberger-Tang}{Programming Library}{\_U\_dyn\_register}\_U\_dyn\_register -- register unwind-info for dynamically generated code
+\end{Name}
+
+\section{Synopsis}
+
+\File{\#include $<$libunwind.h$>$}\\
+
+\Type{void} \Func{\_U\_dyn\_register}(\Type{unw\_dyn\_info\_t~*}\Var{di});\\
+
+\section{Description}
+
+The \Func{\_U\_dyn\_register}() routine registers unwind-info for a
+dynamically generated procedure.  The procedure's unwind-info is
+described by a structure of type \Type{unw\_dyn\_info\_t} (see
+\SeeAlso{libunwind-dynamic(3)}).  A pointer to this structure is
+passed in argument \Var{di}.
+
+The \Func{\_U\_dyn\_register}() routine is guaranteed to execute in
+constant time (in the absence of contention from concurrent calls to
+\Func{\_U\_dyn\_register}() or \Func{\_U\_dyn\_cancel}()).
+
+
+\section{Thread and Signal Safety}
+
+\Func{\_U\_dyn\_register}() is thread-safe but \emph{not} safe to use
+from a signal handler.
+
+\section{See Also}
+
+\SeeAlso{libunwind-dynamic(3)}, \SeeAlso{\_U\_dyn\_cancel(3)}
+
+\section{Author}
+
+\noindent
+David Mosberger-Tang\\
+Email: \Email{dmosberger@gmail.com}\\
+WWW: \URL{http://www.nongnu.org/libunwind/}.
+\LatexManEnd
+
+\end{document}
diff --git a/src/third_party/unwind/dist/doc/common.tex.in b/src/third_party/unwind/dist/doc/common.tex.in
new file mode 100644
index 00000000000..91c96a9df48
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/common.tex.in
@@ -0,0 +1,11 @@
+\setVersion{@VERSION@}
+
+\sloppy
+
+\newcommand{\Lt}{\symbol{"3C}}
+\newcommand{\Gt}{\symbol{"3E}}
+\newcommand{\Type}[1]{\File{#1}}        % see libunwind.trans
+\newcommand{\Func}[1]{\Prog{#1}}        % see libunwind.trans
+\newcommand{\Var}[1]{\Prog{#1}}         % see libunwind.trans
+\newcommand{\Const}[1]{\File{#1}}       % see libunwind.trans
+\newcommand{\SeeAlso}[2]{\File{#1}}	% see libunwind.trans
diff --git a/src/third_party/unwind/dist/doc/libunwind-dynamic.man b/src/third_party/unwind/dist/doc/libunwind-dynamic.man
new file mode 100644
index 00000000000..7c7507cb108
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/libunwind-dynamic.man
@@ -0,0 +1,538 @@
+'\" t
+.\" Manual page created with latex2man on Thu Aug 16 09:44:44 MDT 2007
+.\" NOTE: This file is generated, DO NOT EDIT.
+.de Vb
+.ft CW
+.nf
+..
+.de Ve
+.ft R
+
+.fi
+..
+.TH "LIBUNWIND\-DYNAMIC" "3" "16 August 2007" "Programming Library " "Programming Library "
+.SH NAME
+libunwind\-dynamic
+\-\- libunwind\-support for runtime\-generated code 
+.PP
+.SH INTRODUCTION
+
+.PP
+For libunwind
+to do its job, it needs to be able to reconstruct 
+the \fIframe state\fP
+of each frame in a call\-chain. The frame state 
+describes the subset of the machine\-state that consists of the 
+\fIframe registers\fP
+(typically the instruction\-pointer and the 
+stack\-pointer) and all callee\-saved registers (preserved registers). 
+The frame state describes each register either by providing its 
+current value (for frame registers) or by providing the location at 
+which the current value is stored (callee\-saved registers). 
+.PP
+For statically generated code, the compiler normally takes care of 
+emitting \fIunwind\-info\fP
+which provides the minimum amount of 
+information needed to reconstruct the frame\-state for each instruction 
+in a procedure. For dynamically generated code, the runtime code 
+generator must use the dynamic unwind\-info interface provided by 
+libunwind
+to supply the equivalent information. This manual 
+page describes the format of this information in detail. 
+.PP
+For the purpose of this discussion, a \fIprocedure\fP
+is defined to 
+be an arbitrary piece of \fIcontiguous\fP
+code. Normally, each 
+procedure directly corresponds to a function in the source\-language 
+but this is not strictly required. For example, a runtime 
+code\-generator could translate a given function into two separate 
+(discontiguous) procedures: one for frequently\-executed (hot) code and 
+one for rarely\-executed (cold) code. Similarly, simple 
+source\-language functions (usually leaf functions) may get translated 
+into code for which the default unwind\-conventions apply and for such 
+code, it is not strictly necessary to register dynamic unwind\-info. 
+.PP
+A procedure logically consists of a sequence of \fIregions\fP\&.
+Regions are nested in the sense that the frame state at the end of one 
+region is, by default, assumed to be the frame state for the next 
+region. Each region is thought of as being divided into a 
+\fIprologue\fP,
+a \fIbody\fP,
+and an \fIepilogue\fP\&.
+Each of them 
+can be empty. If non\-empty, the prologue sets up the frame state for 
+the body. For example, the prologue may need to allocate some space 
+on the stack and save certain callee\-saved registers. The body 
+performs the actual work of the procedure but does not change the 
+frame state in any way. If non\-empty, the epilogue restores the 
+previous frame state and as such it undoes or cancels the effect of 
+the prologue. In fact, a single epilogue may undo the effect of the 
+prologues of several (nested) regions. 
+.PP
+We should point out that even though the prologue, body, and epilogue 
+are logically separate entities, optimizing code\-generators will 
+generally interleave instructions from all three entities. For this 
+reason, the dynamic unwind\-info interface of libunwind
+makes no 
+distinction whatsoever between prologue and body. Similarly, the 
+exact set of instructions that make up an epilogue is also irrelevant. 
+The only point in the epilogue that needs to be described explicitly 
+by the dynamic unwind\-info is the point at which the stack\-pointer 
+gets restored. The reason this point needs to be described is that 
+once the stack\-pointer is restored, all values saved in the 
+deallocated portion of the stack frame become invalid and hence 
+libunwind
+needs to know about it. The portion of the frame 
+state not saved on the stack is assume to remain valid through the end 
+of the region. For this reason, there is usually no need to describe 
+instructions which restore the contents of callee\-saved registers. 
+.PP
+Within a region, each instruction that affects the frame state in some 
+fashion needs to be described with an operation descriptor. For this 
+purpose, each instruction in the region is assigned a unique index. 
+Exactly how this index is derived depends on the architecture. For 
+example, on RISC and EPIC\-style architecture, instructions have a 
+fixed size so it\&'s possible to simply number the instructions. In 
+contrast, most CISC use variable\-length instruction encodings, so it 
+is usually necessary to use a byte\-offset as the index. Given the 
+instruction index, the operation descriptor specifies the effect of 
+the instruction in an abstract manner. For example, it might express 
+that the instruction stores calle\-saved register r1
+at offset 16 
+in the stack frame. 
+.PP
+.SH PROCEDURES
+
+.PP
+A runtime code\-generator registers the dynamic unwind\-info of a 
+procedure by setting up a structure of type unw_dyn_info_t
+and calling _U_dyn_register(),
+passing the address of the 
+structure as the sole argument. The members of the 
+unw_dyn_info_t
+structure are described below: 
+.TP
+void *next
+ Private to libunwind\&.
+Must not be used 
+by the application. 
+.TP
+void *prev
+ Private to libunwind\&.
+Must not be used 
+by the application. 
+.TP
+unw_word_t start_ip
+ The start\-address of the 
+instructions of the procedure (remember: procedure are defined to be 
+contiguous pieces of code, so a single code\-range is sufficient). 
+.TP
+unw_word_t end_ip
+ The end\-address of the 
+instructions of the procedure (non\-inclusive, that is, 
+end_ip\-start_ip
+is the size of the procedure in 
+bytes). 
+.TP
+unw_word_t gp
+ The global\-pointer value in use 
+for this procedure. The exact meaing of the global\-pointer is 
+architecture\-specific and on some architecture, it is not used at 
+all. 
+.TP
+int32_t format
+ The format of the unwind\-info. 
+This member can be one of UNW_INFO_FORMAT_DYNAMIC,
+UNW_INFO_FORMAT_TABLE,
+or 
+UNW_INFO_FORMAT_REMOTE_TABLE\&.
+.TP
+union u
+ This union contains one sub\-member 
+structure for every possible unwind\-info format: 
+.RS
+.TP
+unw_dyn_proc_info_t pi
+ This member is used 
+for format UNW_INFO_FORMAT_DYNAMIC\&.
+.TP
+unw_dyn_table_info_t ti
+ This member is used 
+for format UNW_INFO_FORMAT_TABLE\&.
+.TP
+unw_dyn_remote_table_info_t rti
+ This member 
+is used for format UNW_INFO_FORMAT_REMOTE_TABLE\&.
+.RE
+.RS
+.PP
+The format of these sub\-members is described in detail below. 
+.RE
+.PP
+.SS PROC\-INFO FORMAT
+.PP
+This is the preferred dynamic unwind\-info format and it is generally 
+the one used by full\-blown runtime code\-generators. In this format, 
+the details of a procedure are described by a structure of type 
+unw_dyn_proc_info_t\&.
+This structure contains the following 
+members: 
+.PP
+.RE
+.TP
+unw_word_t name_ptr
+ The address of a 
+(human\-readable) name of the procedure or 0 if no such name is 
+available. If non\-zero, The string stored at this address must be 
+ASCII NUL terminated. For source languages that use name\-mangling 
+(such as C++ or Java) the string stored at this address should be 
+the \fIdemangled\fP
+version of the name. 
+.PP
+.TP
+unw_word_t handler
+ The address of the 
+personality\-routine for this procedure. Personality\-routines are 
+used in conjunction with exception handling. See the C++ ABI draft 
+(http://www.codesourcery.com/cxx\-abi/) for an overview and a 
+description of the personality routine. If the procedure has no 
+personality routine, handler
+must be set to 0. 
+.PP
+.TP
+uint32_t flags
+ A bitmask of flags. At the 
+moment, no flags have been defined and this member must be 
+set to 0. 
+.PP
+.TP
+unw_dyn_region_info_t *regions
+ A NULL\-terminated 
+linked list of region\-descriptors. See section ``Region 
+descriptors\&'' below for more details. 
+.PP
+.SS TABLE\-INFO FORMAT
+.PP
+This format is generally used when the dynamically generated code was 
+derived from static code and the unwind\-info for the dynamic and the 
+static versions is identical. For example, this format can be useful 
+when loading statically\-generated code into an address\-space in a 
+non\-standard fashion (i.e., through some means other than 
+dlopen()).
+In this format, the details of a group of procedures 
+is described by a structure of type unw_dyn_table_info\&.
+This structure contains the following members: 
+.PP
+.TP
+unw_word_t name_ptr
+ The address of a 
+(human\-readable) name of the procedure or 0 if no such name is 
+available. If non\-zero, The string stored at this address must be 
+ASCII NUL terminated. For source languages that use name\-mangling 
+(such as C++ or Java) the string stored at this address should be 
+the \fIdemangled\fP
+version of the name. 
+.PP
+.TP
+unw_word_t segbase
+ The segment\-base value 
+that needs to be added to the segment\-relative values stored in the 
+unwind\-info. The exact meaning of this value is 
+architecture\-specific. 
+.PP
+.TP
+unw_word_t table_len
+ The length of the 
+unwind\-info (table_data)
+counted in units of words 
+(unw_word_t).
+.PP
+.TP
+unw_word_t table_data
+ A pointer to the actual 
+data encoding the unwind\-info. The exact format is 
+architecture\-specific (see architecture\-specific sections below). 
+.PP
+.SS REMOTE TABLE\-INFO FORMAT
+.PP
+The remote table\-info format has the same basic purpose as the regular 
+table\-info format. The only difference is that when libunwind
+uses the unwind\-info, it will keep the table data in the target 
+address\-space (which may be remote). Consequently, the type of the 
+table_data
+member is unw_word_t
+rather than a pointer. 
+This implies that libunwind
+will have to access the table\-data 
+via the address\-space\&'s access_mem()
+call\-back, rather than 
+through a direct memory reference. 
+.PP
+From the point of view of a runtime\-code generator, the remote 
+table\-info format offers no advantage and it is expected that such 
+generators will describe their procedures either with the proc\-info 
+format or the normal table\-info format. The main reason that the 
+remote table\-info format exists is to enable the 
+address\-space\-specific find_proc_info()
+callback (see 
+unw_create_addr_space(3))
+to return unwind tables whose 
+data remains in remote memory. This can speed up unwinding (e.g., for 
+a debugger) because it reduces the amount of data that needs to be 
+loaded from remote memory. 
+.PP
+.SH REGIONS DESCRIPTORS
+
+.PP
+A region descriptor is a variable length structure that describes how 
+each instruction in the region affects the frame state. Of course, 
+most instructions in a region usualy do not change the frame state and 
+for those, nothing needs to be recorded in the region descriptor. A 
+region descriptor is a structure of type 
+unw_dyn_region_info_t
+and has the following members: 
+.TP
+unw_dyn_region_info_t *next
+ A pointer to the 
+next region. If this is the last region, next
+is NULL\&.
+.TP
+int32_t insn_count
+ The length of the region in 
+instructions. Each instruction is assumed to have a fixed size (see 
+architecture\-specific sections for details). The value of 
+insn_count
+may be negative in the last region of a procedure 
+(i.e., it may be negative only if next
+is NULL).
+A 
+negative value indicates that the region covers the last \fIN\fP
+instructions of the procedure, where \fIN\fP
+is the absolute value 
+of insn_count\&.
+.TP
+uint32_t op_count
+ The (allocated) length of 
+the op_count
+array. 
+.TP
+unw_dyn_op_t op
+ An array of dynamic unwind 
+directives. See Section ``Dynamic unwind directives\&'' for a 
+description of the directives. 
+.PP
+A region descriptor with an insn_count
+of zero is an 
+\fIempty region\fP
+and such regions are perfectly legal. In fact, 
+empty regions can be useful to establish a particular frame state 
+before the start of another region. 
+.PP
+A single region list can be shared across multiple procedures provided 
+those procedures share a common prologue and epilogue (their bodies 
+may differ, of course). Normally, such procedures consist of a canned 
+prologue, the body, and a canned epilogue. This could be described by 
+two regions: one covering the prologue and one covering the epilogue. 
+Since the body length is variable, the latter region would need to 
+specify a negative value in insn_count
+such that 
+libunwind
+knows that the region covers the end of the procedure 
+(up to the address specified by end_ip).
+.PP
+The region descriptor is a variable length structure to make it 
+possible to allocate all the necessary memory with a single 
+memory\-allocation request. To facilitate the allocation of a region 
+descriptors libunwind
+provides a helper routine with the 
+following synopsis: 
+.PP
+size_t
+_U_dyn_region_size(int
+op_count);
+.PP
+This routine returns the number of bytes needed to hold a region 
+descriptor with space for op_count
+unwind directives. Note 
+that the length of the op
+array does not have to match exactly 
+with the number of directives in a region. Instead, it is sufficient 
+if the op
+array contains at least as many entries as there are 
+directives, since the end of the directives can always be indicated 
+with the UNW_DYN_STOP
+directive. 
+.PP
+.SH DYNAMIC UNWIND DIRECTIVES
+
+.PP
+A dynamic unwind directive describes how the frame state changes 
+at a particular point within a region. The description is in 
+the form of a structure of type unw_dyn_op_t\&.
+This 
+structure has the following members: 
+.TP
+int8_t tag
+ The operation tag. Must be one 
+of the unw_dyn_operation_t
+values described below. 
+.TP
+int8_t qp
+ The qualifying predicate that controls 
+whether or not this directive is active. This is useful for 
+predicated architecturs such as IA\-64 or ARM, where the contents of 
+another (callee\-saved) register determines whether or not an 
+instruction is executed (takes effect). If the directive is always 
+active, this member should be set to the manifest constant 
+_U_QP_TRUE
+(this constant is defined for all 
+architectures, predicated or not). 
+.TP
+int16_t reg
+ The number of the register affected 
+by the instruction. 
+.TP
+int32_t when
+ The region\-relative number of 
+the instruction to which this directive applies. For example, 
+a value of 0 means that the effect described by this directive 
+has taken place once the first instruction in the region has 
+executed. 
+.TP
+unw_word_t val
+ The value to be applied by the 
+operation tag. The exact meaning of this value varies by tag. See 
+Section ``Operation tags\&'' below. 
+.PP
+It is perfectly legitimate to specify multiple dynamic unwind 
+directives with the same when
+value, if a particular instruction 
+has a complex effect on the frame state. 
+.PP
+Empty regions by definition contain no actual instructions and as such 
+the directives are not tied to a particular instruction. By 
+convention, the when
+member should be set to 0, however. 
+.PP
+There is no need for the dynamic unwind directives to appear 
+in order of increasing when
+values. If the directives happen to 
+be sorted in that order, it may result in slightly faster execution, 
+but a runtime code\-generator should not go to extra lengths just to 
+ensure that the directives are sorted. 
+.PP
+IMPLEMENTATION NOTE: should libunwind
+implementations for 
+certain architectures prefer the list of unwind directives to be 
+sorted, it is recommended that such implementations first check 
+whether the list happens to be sorted already and, if not, sort the 
+directives explicitly before the first use. With this approach, the 
+overhead of explicit sorting is only paid when there is a real benefit 
+and if the runtime code\-generator happens to generated sorted lists 
+naturally, the performance penalty is limited to a simple O(N) check. 
+.PP
+.SS OPERATIONS TAGS
+.PP
+The possible operation tags are defined by enumeration type 
+unw_dyn_operation_t
+which defines the following 
+values: 
+.PP
+.TP
+UNW_DYN_STOP
+ Marks the end of the dynamic unwind 
+directive list. All remaining entries in the op
+array of the 
+region\-descriptor are ignored. This tag is guaranteed to have a 
+value of 0. 
+.PP
+.TP
+UNW_DYN_SAVE_REG
+ Marks an instruction which saves 
+register reg
+to register val\&.
+.PP
+.TP
+UNW_DYN_SPILL_FP_REL
+ Marks an instruction which 
+spills register reg
+to a frame\-pointer\-relative location. The 
+frame\-pointer\-relative offset is given by the value stored in member 
+val\&.
+See the architecture\-specific sections for a description 
+of the stack frame layout. 
+.PP
+.TP
+UNW_DYN_SPILL_SP_REL
+ Marks an instruction which 
+spills register reg
+to a stack\-pointer\-relative location. The 
+stack\-pointer\-relative offset is given by the value stored in member 
+val\&.
+See the architecture\-specific sections for a description 
+of the stack frame layout. 
+.PP
+.TP
+UNW_DYN_ADD
+ Marks an instruction which adds 
+the constant value val
+to register reg\&.
+To add subtract 
+a constant value, store the two\&'s\-complement of the value in 
+val\&.
+The set of registers that can be specified for this tag 
+is described in the architecture\-specific sections below. 
+.PP
+.TP
+UNW_DYN_POP_FRAMES
+ .PP
+.TP
+UNW_DYN_LABEL_STATE
+ .PP
+.TP
+UNW_DYN_COPY_STATE
+ .PP
+.TP
+UNW_DYN_ALIAS
+ .PP
+unw_dyn_op_t 
+.PP
+_U_dyn_op_save_reg(); 
+_U_dyn_op_spill_fp_rel(); 
+_U_dyn_op_spill_sp_rel(); 
+_U_dyn_op_add(); 
+_U_dyn_op_pop_frames(); 
+_U_dyn_op_label_state(); 
+_U_dyn_op_copy_state(); 
+_U_dyn_op_alias(); 
+_U_dyn_op_stop(); 
+.PP
+.SH IA\-64 SPECIFICS
+
+.PP
+\- meaning of segbase member in table\-info/table\-remote\-info format 
+\- format of table_data in table\-info/table\-remote\-info format 
+\- instruction size: each bundle is counted as 3 instructions, regardless 
+of template (MLX) 
+\- describe stack\-frame layout, especially with regards to sp\-relative 
+and fp\-relative addressing 
+\- UNW_DYN_ADD can only add to ``sp\&'' (always a negative value); use 
+POP_FRAMES otherwise 
+.PP
+.SH SEE ALSO
+
+.PP
+libunwind(3),
+_U_dyn_register(3),
+_U_dyn_cancel(3)
+.PP
+.SH AUTHOR
+
+.PP
+David Mosberger\-Tang
+.br
+Email: \fBdmosberger@gmail.com\fP
+.br
+WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
+.\" NOTE: This file is generated, DO NOT EDIT.
diff --git a/src/third_party/unwind/dist/doc/libunwind-dynamic.tex b/src/third_party/unwind/dist/doc/libunwind-dynamic.tex
new file mode 100644
index 00000000000..21e895a34f3
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/libunwind-dynamic.tex
@@ -0,0 +1,401 @@
+\documentclass{article}
+\usepackage[fancyhdr,pdf]{latex2man}
+
+\input{common.tex}
+
+\begin{document}
+
+\begin{Name}{3}{libunwind-dynamic}{David Mosberger-Tang}{Programming Library}{Introduction to dynamic unwind-info}libunwind-dynamic -- libunwind-support for runtime-generated code
+\end{Name}
+
+\section{Introduction}
+
+For \Prog{libunwind} to do its job, it needs to be able to reconstruct
+the \emph{frame state} of each frame in a call-chain.  The frame state
+describes the subset of the machine-state that consists of the
+\emph{frame registers} (typically the instruction-pointer and the
+stack-pointer) and all callee-saved registers (preserved registers).
+The frame state describes each register either by providing its
+current value (for frame registers) or by providing the location at
+which the current value is stored (callee-saved registers).
+
+For statically generated code, the compiler normally takes care of
+emitting \emph{unwind-info} which provides the minimum amount of
+information needed to reconstruct the frame-state for each instruction
+in a procedure.  For dynamically generated code, the runtime code
+generator must use the dynamic unwind-info interface provided by
+\Prog{libunwind} to supply the equivalent information.  This manual
+page describes the format of this information in detail.
+
+For the purpose of this discussion, a \emph{procedure} is defined to
+be an arbitrary piece of \emph{contiguous} code.  Normally, each
+procedure directly corresponds to a function in the source-language
+but this is not strictly required.  For example, a runtime
+code-generator could translate a given function into two separate
+(discontiguous) procedures: one for frequently-executed (hot) code and
+one for rarely-executed (cold) code.  Similarly, simple
+source-language functions (usually leaf functions) may get translated
+into code for which the default unwind-conventions apply and for such
+code, it is not strictly necessary to register dynamic unwind-info.
+
+A procedure logically consists of a sequence of \emph{regions}.
+Regions are nested in the sense that the frame state at the end of one
+region is, by default, assumed to be the frame state for the next
+region.  Each region is thought of as being divided into a
+\emph{prologue}, a \emph{body}, and an \emph{epilogue}.  Each of them
+can be empty.  If non-empty, the prologue sets up the frame state for
+the body.  For example, the prologue may need to allocate some space
+on the stack and save certain callee-saved registers.  The body
+performs the actual work of the procedure but does not change the
+frame state in any way.  If non-empty, the epilogue restores the
+previous frame state and as such it undoes or cancels the effect of
+the prologue.  In fact, a single epilogue may undo the effect of the
+prologues of several (nested) regions.
+
+We should point out that even though the prologue, body, and epilogue
+are logically separate entities, optimizing code-generators will
+generally interleave instructions from all three entities.  For this
+reason, the dynamic unwind-info interface of \Prog{libunwind} makes no
+distinction whatsoever between prologue and body.  Similarly, the
+exact set of instructions that make up an epilogue is also irrelevant.
+The only point in the epilogue that needs to be described explicitly
+by the dynamic unwind-info is the point at which the stack-pointer
+gets restored.  The reason this point needs to be described is that
+once the stack-pointer is restored, all values saved in the
+deallocated portion of the stack frame become invalid and hence
+\Prog{libunwind} needs to know about it.  The portion of the frame
+state not saved on the stack is assume to remain valid through the end
+of the region.  For this reason, there is usually no need to describe
+instructions which restore the contents of callee-saved registers.
+
+Within a region, each instruction that affects the frame state in some
+fashion needs to be described with an operation descriptor.  For this
+purpose, each instruction in the region is assigned a unique index.
+Exactly how this index is derived depends on the architecture.  For
+example, on RISC and EPIC-style architecture, instructions have a
+fixed size so it's possible to simply number the instructions.  In
+contrast, most CISC use variable-length instruction encodings, so it
+is usually necessary to use a byte-offset as the index.  Given the
+instruction index, the operation descriptor specifies the effect of
+the instruction in an abstract manner.  For example, it might express
+that the instruction stores calle-saved register \Var{r1} at offset 16
+in the stack frame.
+
+\section{Procedures}
+
+A runtime code-generator registers the dynamic unwind-info of a
+procedure by setting up a structure of type \Type{unw\_dyn\_info\_t}
+and calling \Func{\_U\_dyn\_register}(), passing the address of the
+structure as the sole argument.  The members of the
+\Type{unw\_dyn\_info\_t} structure are described below:
+\begin{itemize}
+\item[\Type{void~*}next] Private to \Prog{libunwind}.  Must not be used
+  by the application.
+\item[\Type{void~*}prev] Private to \Prog{libunwind}.  Must not be used
+  by the application.
+\item[\Type{unw\_word\_t} \Var{start\_ip}] The start-address of the
+  instructions of the procedure (remember: procedure are defined to be
+  contiguous pieces of code, so a single code-range is sufficient).
+\item[\Type{unw\_word\_t} \Var{end\_ip}] The end-address of the
+  instructions of the procedure (non-inclusive, that is,
+  \Var{end\_ip}-\Var{start\_ip} is the size of the procedure in
+  bytes).
+\item[\Type{unw\_word\_t} \Var{gp}] The global-pointer value in use
+  for this procedure.  The exact meaing of the global-pointer is
+  architecture-specific and on some architecture, it is not used at
+  all.
+\item[\Type{int32\_t} \Var{format}] The format of the unwind-info.
+  This member can be one of \Const{UNW\_INFO\_FORMAT\_DYNAMIC},
+  \Const{UNW\_INFO\_FORMAT\_TABLE}, or
+  \Const{UNW\_INFO\_FORMAT\_REMOTE\_TABLE}.
+\item[\Type{union} \Var{u}] This union contains one sub-member
+  structure for every possible unwind-info format:
+  \begin{description}
+  \item[\Type{unw\_dyn\_proc\_info\_t} \Var{pi}] This member is used
+    for format \Const{UNW\_INFO\_FORMAT\_DYNAMIC}.
+  \item[\Type{unw\_dyn\_table\_info\_t} \Var{ti}] This member is used
+    for format \Const{UNW\_INFO\_FORMAT\_TABLE}.
+  \item[\Type{unw\_dyn\_remote\_table\_info\_t} \Var{rti}] This member
+    is used for format \Const{UNW\_INFO\_FORMAT\_REMOTE\_TABLE}.
+  \end{description}\
+  The format of these sub-members is described in detail below.
+\end{itemize}
+
+\subsection{Proc-info format}
+
+This is the preferred dynamic unwind-info format and it is generally
+the one used by full-blown runtime code-generators.  In this format,
+the details of a procedure are described by a structure of type
+\Type{unw\_dyn\_proc\_info\_t}.  This structure contains the following
+members:
+\begin{description}
+
+\item[\Type{unw\_word\_t} \Var{name\_ptr}] The address of a
+  (human-readable) name of the procedure or 0 if no such name is
+  available.  If non-zero, The string stored at this address must be
+  ASCII NUL terminated.  For source languages that use name-mangling
+  (such as C++ or Java) the string stored at this address should be
+  the \emph{demangled} version of the name.
+
+\item[\Type{unw\_word\_t} \Var{handler}] The address of the
+  personality-routine for this procedure.  Personality-routines are
+  used in conjunction with exception handling.  See the C++ ABI draft
+  (http://www.codesourcery.com/cxx-abi/) for an overview and a
+  description of the personality routine.  If the procedure has no
+  personality routine, \Var{handler} must be set to 0.
+
+\item[\Type{uint32\_t} \Var{flags}] A bitmask of flags.  At the
+  moment, no flags have been defined and this member must be
+  set to 0.
+
+\item[\Type{unw\_dyn\_region\_info\_t~*}\Var{regions}] A NULL-terminated
+  linked list of region-descriptors.  See section ``Region
+  descriptors'' below for more details.
+
+\end{description}
+
+\subsection{Table-info format}
+
+This format is generally used when the dynamically generated code was
+derived from static code and the unwind-info for the dynamic and the
+static versions is identical.  For example, this format can be useful
+when loading statically-generated code into an address-space in a
+non-standard fashion (i.e., through some means other than
+\Func{dlopen}()).  In this format, the details of a group of procedures
+is described by a structure of type \Type{unw\_dyn\_table\_info}.
+This structure contains the following members:
+\begin{description}
+
+\item[\Type{unw\_word\_t} \Var{name\_ptr}] The address of a
+  (human-readable) name of the procedure or 0 if no such name is
+  available.  If non-zero, The string stored at this address must be
+  ASCII NUL terminated.  For source languages that use name-mangling
+  (such as C++ or Java) the string stored at this address should be
+  the \emph{demangled} version of the name.
+
+\item[\Type{unw\_word\_t} \Var{segbase}] The segment-base value
+  that needs to be added to the segment-relative values stored in the
+  unwind-info.  The exact meaning of this value is
+  architecture-specific.
+
+\item[\Type{unw\_word\_t} \Var{table\_len}] The length of the
+  unwind-info (\Var{table\_data}) counted in units of words
+  (\Type{unw\_word\_t}).
+
+\item[\Type{unw\_word\_t} \Var{table\_data}] A pointer to the actual
+  data encoding the unwind-info.  The exact format is
+  architecture-specific (see architecture-specific sections below).
+
+\end{description}
+
+\subsection{Remote table-info format}
+
+The remote table-info format has the same basic purpose as the regular
+table-info format.  The only difference is that when \Prog{libunwind}
+uses the unwind-info, it will keep the table data in the target
+address-space (which may be remote).  Consequently, the type of the
+\Var{table\_data} member is \Type{unw\_word\_t} rather than a pointer.
+This implies that \Prog{libunwind} will have to access the table-data
+via the address-space's \Func{access\_mem}() call-back, rather than
+through a direct memory reference.
+
+From the point of view of a runtime-code generator, the remote
+table-info format offers no advantage and it is expected that such
+generators will describe their procedures either with the proc-info
+format or the normal table-info format.  The main reason that the
+remote table-info format exists is to enable the
+address-space-specific \Func{find\_proc\_info}() callback (see
+\SeeAlso{unw\_create\_addr\_space}(3)) to return unwind tables whose
+data remains in remote memory.  This can speed up unwinding (e.g., for
+a debugger) because it reduces the amount of data that needs to be
+loaded from remote memory.
+
+\section{Regions descriptors}
+
+A region descriptor is a variable length structure that describes how
+each instruction in the region affects the frame state.  Of course,
+most instructions in a region usualy do not change the frame state and
+for those, nothing needs to be recorded in the region descriptor.  A
+region descriptor is a structure of type
+\Type{unw\_dyn\_region\_info\_t} and has the following members:
+\begin{description}
+\item[\Type{unw\_dyn\_region\_info\_t~*}\Var{next}] A pointer to the
+  next region.  If this is the last region, \Var{next} is \Const{NULL}.
+\item[\Type{int32\_t} \Var{insn\_count}] The length of the region in
+  instructions.  Each instruction is assumed to have a fixed size (see
+  architecture-specific sections for details).  The value of
+  \Var{insn\_count} may be negative in the last region of a procedure
+  (i.e., it may be negative only if \Var{next} is \Const{NULL}).  A
+  negative value indicates that the region covers the last \emph{N}
+  instructions of the procedure, where \emph{N} is the absolute value
+  of \Var{insn\_count}.
+\item[\Type{uint32\_t} \Var{op\_count}] The (allocated) length of
+  the \Var{op\_count} array.
+\item[\Type{unw\_dyn\_op\_t} \Var{op}] An array of dynamic unwind
+  directives.  See Section ``Dynamic unwind directives'' for a
+  description of the directives.
+\end{description}
+A region descriptor with an \Var{insn\_count} of zero is an
+\emph{empty region} and such regions are perfectly legal.  In fact,
+empty regions can be useful to establish a particular frame state
+before the start of another region.
+
+A single region list can be shared across multiple procedures provided
+those procedures share a common prologue and epilogue (their bodies
+may differ, of course).  Normally, such procedures consist of a canned
+prologue, the body, and a canned epilogue.  This could be described by
+two regions: one covering the prologue and one covering the epilogue.
+Since the body length is variable, the latter region would need to
+specify a negative value in \Var{insn\_count} such that
+\Prog{libunwind} knows that the region covers the end of the procedure
+(up to the address specified by \Var{end\_ip}).
+
+The region descriptor is a variable length structure to make it
+possible to allocate all the necessary memory with a single
+memory-allocation request.  To facilitate the allocation of a region
+descriptors \Prog{libunwind} provides a helper routine with the
+following synopsis:
+
+\noindent
+\Type{size\_t} \Func{\_U\_dyn\_region\_size}(\Type{int} \Var{op\_count});
+
+This routine returns the number of bytes needed to hold a region
+descriptor with space for \Var{op\_count} unwind directives.  Note
+that the length of the \Var{op} array does not have to match exactly
+with the number of directives in a region.  Instead, it is sufficient
+if the \Var{op} array contains at least as many entries as there are
+directives, since the end of the directives can always be indicated
+with the \Const{UNW\_DYN\_STOP} directive.
+
+\section{Dynamic unwind directives}
+
+A dynamic unwind directive describes how the frame state changes
+at a particular point within a region.  The description is in
+the form of a structure of type \Type{unw\_dyn\_op\_t}.  This
+structure has the following members:
+\begin{description}
+\item[\Type{int8\_t} \Var{tag}] The operation tag.  Must be one
+  of the \Type{unw\_dyn\_operation\_t} values described below.
+\item[\Type{int8\_t} \Var{qp}] The qualifying predicate that controls
+  whether or not this directive is active.  This is useful for
+  predicated architecturs such as IA-64 or ARM, where the contents of
+  another (callee-saved) register determines whether or not an
+  instruction is executed (takes effect).  If the directive is always
+  active, this member should be set to the manifest constant
+  \Const{\_U\_QP\_TRUE} (this constant is defined for all
+  architectures, predicated or not).
+\item[\Type{int16\_t} \Var{reg}] The number of the register affected
+  by the instruction.
+\item[\Type{int32\_t} \Var{when}] The region-relative number of
+  the instruction to which this directive applies.  For example,
+  a value of 0 means that the effect described by this directive
+  has taken place once the first instruction in the region has
+  executed.
+\item[\Type{unw\_word\_t} \Var{val}] The value to be applied by the
+  operation tag.  The exact meaning of this value varies by tag.  See
+  Section ``Operation tags'' below.
+\end{description}
+It is perfectly legitimate to specify multiple dynamic unwind
+directives with the same \Var{when} value, if a particular instruction
+has a complex effect on the frame state.
+
+Empty regions by definition contain no actual instructions and as such
+the directives are not tied to a particular instruction.  By
+convention, the \Var{when} member should be set to 0, however.
+
+There is no need for the dynamic unwind directives to appear
+in order of increasing \Var{when} values.  If the directives happen to
+be sorted in that order, it may result in slightly faster execution,
+but a runtime code-generator should not go to extra lengths just to
+ensure that the directives are sorted.
+
+IMPLEMENTATION NOTE: should \Prog{libunwind} implementations for
+certain architectures prefer the list of unwind directives to be
+sorted, it is recommended that such implementations first check
+whether the list happens to be sorted already and, if not, sort the
+directives explicitly before the first use.  With this approach, the
+overhead of explicit sorting is only paid when there is a real benefit
+and if the runtime code-generator happens to generated sorted lists
+naturally, the performance penalty is limited to a simple O(N) check.
+
+\subsection{Operations tags}
+
+The possible operation tags are defined by enumeration type
+\Type{unw\_dyn\_operation\_t} which defines the following
+values:
+\begin{description}
+
+\item[\Const{UNW\_DYN\_STOP}] Marks the end of the dynamic unwind
+  directive list.  All remaining entries in the \Var{op} array of the
+  region-descriptor are ignored.  This tag is guaranteed to have a
+  value of 0.
+
+\item[\Const{UNW\_DYN\_SAVE\_REG}] Marks an instruction which saves
+  register \Var{reg} to register \Var{val}.
+
+\item[\Const{UNW\_DYN\_SPILL\_FP\_REL}] Marks an instruction which
+  spills register \Var{reg} to a frame-pointer-relative location.  The
+  frame-pointer-relative offset is given by the value stored in member
+  \Var{val}.  See the architecture-specific sections for a description
+  of the stack frame layout.
+
+\item[\Const{UNW\_DYN\_SPILL\_SP\_REL}] Marks an instruction which
+  spills register \Var{reg} to a stack-pointer-relative location.  The
+  stack-pointer-relative offset is given by the value stored in member
+  \Var{val}.  See the architecture-specific sections for a description
+  of the stack frame layout.
+
+\item[\Const{UNW\_DYN\_ADD}] Marks an instruction which adds
+  the constant value \Var{val} to register \Var{reg}.  To add subtract
+  a constant value, store the two's-complement of the value in
+  \Var{val}.  The set of registers that can be specified for this tag
+  is described in the architecture-specific sections below.
+
+\item[\Const{UNW\_DYN\_POP\_FRAMES}]
+
+\item[\Const{UNW\_DYN\_LABEL\_STATE}]
+
+\item[\Const{UNW\_DYN\_COPY\_STATE}]
+
+\item[\Const{UNW\_DYN\_ALIAS}]
+
+\end{description}
+
+unw\_dyn\_op\_t
+
+\_U\_dyn\_op\_save\_reg();
+\_U\_dyn\_op\_spill\_fp\_rel();
+\_U\_dyn\_op\_spill\_sp\_rel();
+\_U\_dyn\_op\_add();
+\_U\_dyn\_op\_pop\_frames();
+\_U\_dyn\_op\_label\_state();
+\_U\_dyn\_op\_copy\_state();
+\_U\_dyn\_op\_alias();
+\_U\_dyn\_op\_stop();
+
+\section{IA-64 specifics}
+
+- meaning of segbase member in table-info/table-remote-info format
+- format of table\_data in table-info/table-remote-info format
+- instruction size: each bundle is counted as 3 instructions, regardless
+  of template (MLX)
+- describe stack-frame layout, especially with regards to sp-relative
+  and fp-relative addressing
+- UNW\_DYN\_ADD can only add to ``sp'' (always a negative value); use
+  POP\_FRAMES otherwise
+
+\section{See Also}
+
+\SeeAlso{libunwind(3)},
+\SeeAlso{\_U\_dyn\_register(3)},
+\SeeAlso{\_U\_dyn\_cancel(3)}
+
+\section{Author}
+
+\noindent
+David Mosberger-Tang\\
+Email: \Email{dmosberger@gmail.com}\\
+WWW: \URL{http://www.nongnu.org/libunwind/}.
+\LatexManEnd
+
+\end{document}
diff --git a/src/third_party/unwind/dist/doc/libunwind-ia64.man b/src/third_party/unwind/dist/doc/libunwind-ia64.man
new file mode 100644
index 00000000000..06b141eb3e2
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/libunwind-ia64.man
@@ -0,0 +1,314 @@
+'\" t
+.\" Manual page created with latex2man on Thu Aug 16 09:44:44 MDT 2007
+.\" NOTE: This file is generated, DO NOT EDIT.
+.de Vb
+.ft CW
+.nf
+..
+.de Ve
+.ft R
+
+.fi
+..
+.TH "LIBUNWIND\-IA64" "3" "16 August 2007" "Programming Library " "Programming Library "
+.SH NAME
+libunwind\-ia64
+\-\- IA\-64\-specific support in libunwind 
+.PP
+.SH INTRODUCTION
+
+.PP
+The IA\-64 version of libunwind
+uses a platform\-string of 
+ia64
+and, at least in theory, should be able to support all 
+operating systems adhering to the processor\-specific ABI defined for 
+the Itanium Processor Family. This includes both little\-endian Linux 
+and big\-endian HP\-UX. Furthermore, to make it possible for a single 
+library to unwind both 32\- and 64\-bit targets, the type 
+unw_word_t
+is always defined to be 64 bits wide (independent 
+of the natural word\-size of the host). Having said that, the current 
+implementation has been tested only with IA\-64 Linux. 
+.PP
+When targeting IA\-64, the libunwind
+header file defines the 
+macro UNW_TARGET_IA64
+as 1 and the macro UNW_TARGET
+as ``ia64\&'' (without the quotation marks). The former makes it 
+possible for platform\-dependent unwind code to use 
+conditional\-compilation to select an appropriate implementation. The 
+latter is useful for stringification purposes and to construct 
+target\-platform\-specific symbols. 
+.PP
+One special feature of IA\-64 is the use of NaT bits to support 
+speculative execution. Often, NaT bits are thought of as the ``65\-th 
+bit\&'' of a general register. However, to make everything fit into 
+64\-bit wide unw_word_t
+values, libunwind
+treats the 
+NaT\-bits like separate boolean registers, whose 64\-bit value is either 
+TRUE (non\-zero) or FALSE (zero). 
+.PP
+.SH MACHINE\-STATE
+
+.PP
+The machine\-state (set of registers) that is accessible through 
+libunwind
+depends on the type of stack frame that a cursor 
+points to. For normal frames, all ``preserved\&'' (callee\-saved) 
+registers are accessible. For signal\-trampoline frames, all registers 
+(including ``scratch\&'' (caller\-saved) registers) are accessible. Most 
+applications do not have to worry a\-priori about which registers are 
+accessible when. In case of doubt, it is always safe to \fItry\fP
+to 
+access a register (via unw_get_reg()
+or 
+unw_get_fpreg())
+and if the register isn\&'t accessible, the 
+call will fail with a return\-value of \-UNW_EBADREG\&.
+.PP
+As a special exception to the above general rule, scratch registers 
+r15\-r18
+are always accessible, even in normal 
+frames. This makes it possible to pass arguments, e.g., to exception 
+handlers. 
+.PP
+For a detailed description of the IA\-64 register usage convention, 
+please see the ``Itanium Software Conventions and Runtime Architecture 
+Guide\&'', available at: 
+.ce 100
+\fBhttp://www.intel.com/design/itanium/downloads/245358.htm\fP
+.ce 0
+
+.PP
+.SH REGISTER NAMES
+
+.PP
+The IA\-64\-version of libunwind
+defines three kinds of register 
+name macros: frame\-register macros, normal register macros, and 
+convenience macros. Below, we describe each kind in turn: 
+.PP
+.SS FRAME\-REGISTER MACROS
+.PP
+Frame\-registers are special (pseudo) registers because they always 
+have a valid value, even though sometimes they do not get saved 
+explicitly (e.g., if a memory stack frame is 16 bytes in size, the 
+previous stack\-pointer value can be calculated simply as 
+sp+16,
+so there is no need to save the stack\-pointer 
+explicitly). Moreover, the set of frame register values uniquely 
+identifies a stack frame. The IA\-64 architecture defines two stacks 
+(a memory and a register stack). Including the instruction\-pointer 
+(IP), this means there are three frame registers: 
+.TP
+UNW_IA64_IP:
+ Contains the instruction pointer (IP, or 
+``program counter\&'') of the current stack frame. Given this value, 
+the remaining machine\-state corresponds to the register\-values that 
+were present in the CPU when it was just about to execute the 
+instruction pointed to by UNW_IA64_IP\&.
+Bits 0 and 1 of 
+this frame\-register encode the slot number of the instruction. 
+\fBNote:\fP
+Due to the way the call instruction works on IA\-64, 
+the slot number is usually zero, but can be non\-zero, e.g., in the 
+stack\-frame of a signal\-handler trampoline. 
+.TP
+UNW_IA64_SP:
+ Contains the (memory) stack\-pointer 
+value (SP). 
+.TP
+UNW_IA64_BSP:
+ Contains the register backing\-store 
+pointer (BSP). \fBNote:\fP
+the value in this register is equal 
+to the contents of register ar.bsp
+at the time the 
+instruction at UNW_IA64_IP
+was about to begin execution. 
+.PP
+.SS NORMAL REGISTER MACROS
+.PP
+The following normal register name macros are available: 
+.TP
+UNW_IA64_GR:
+ The base\-index for general (integer) 
+registers. Add an index in the range from 0..127 to get a 
+particular general register. For example, to access r4,
+the index UNW_IA64_GR+4
+should be used. 
+Registers r0
+and r1
+(gp)
+are read\-only, 
+and any attempt to write them will result in an error 
+(\-UNW_EREADONLYREG).
+Even though r1
+is 
+read\-only, libunwind
+will automatically adjust its value if 
+the instruction\-pointer (UNW_IA64_IP)
+is modified. For 
+example, if UNW_IA64_IP
+is set to a value inside a 
+function func(),
+then reading 
+UNW_IA64_GR+1
+will return the global\-pointer 
+value for this function. 
+.TP
+UNW_IA64_NAT:
+ The base\-index for the NaT bits of the 
+general (integer) registers. A non\-zero value in these registers 
+corresponds to a set NaT\-bit. Add an index in the range from 0..127 
+to get a particular NaT\-bit register. For example, to access the 
+NaT bit of r4,
+the index UNW_IA64_NAT+4
+should be used. 
+.TP
+UNW_IA64_FR:
+ The base\-index for floating\-point 
+registers. Add an index in the range from 0..127 to get a 
+particular floating\-point register. For example, to access 
+f2,
+the index UNW_IA64_FR+2
+should be 
+used. Registers f0
+and f1
+are read\-only, and any 
+attempt to write to indices UNW_IA64_FR+0
+or 
+UNW_IA64_FR+1
+will result in an error 
+(\-UNW_EREADONLYREG).
+.TP
+UNW_IA64_AR:
+ The base\-index for application 
+registers. Add an index in the range from 0..127 to get a 
+particular application register. For example, to access 
+ar40,
+the index UNW_IA64_AR+40
+should be 
+used. The IA\-64 architecture defines several application registers 
+as ``reserved for future use\&''\&. Attempting to access such registers 
+results in an error (\-UNW_EBADREG).
+.TP
+UNW_IA64_BR:
+ The base\-index for branch registers. 
+Add an index in the range from 0..7 to get a particular branch 
+register. For example, to access b6,
+the index 
+UNW_IA64_BR+6
+should be used. 
+.TP
+UNW_IA64_PR:
+ Contains the set of predicate registers. 
+This 64\-bit wide register contains registers p0
+through 
+p63
+in the ``broad\-side\&'' format. Just like with the 
+``move predicates\&'' instruction, the registers are mapped as if 
+CFM.rrb.pr
+were set to 0. Thus, in general the value of 
+predicate register pN
+with N>=16 can be found 
+in bit 16 + ((N\-16)+CFM.rrb.pr) % 48\&.
+.TP
+UNW_IA64_CFM:
+ Contains the current\-frame\-mask 
+register. 
+.PP
+.SS CONVENIENCE MACROS
+.PP
+Convenience macros are simply aliases for certain frequently used 
+registers: 
+.TP
+UNW_IA64_GP:
+ Alias for UNW_IA64_GR+1,
+the global\-pointer register. 
+.TP
+UNW_IA64_TP:
+ Alias for UNW_IA64_GR+13,
+the thread\-pointer register. 
+.TP
+UNW_IA64_AR_RSC:
+ Alias for UNW_IA64_GR+16,
+the register\-stack configuration register. 
+.TP
+UNW_IA64_AR_BSP:
+ Alias for 
+UNW_IA64_GR+17\&.
+This register index accesses the 
+value of register ar.bsp
+as of the time it was last saved 
+explicitly. This is rarely what you want. Normally, you\&'ll want to 
+use UNW_IA64_BSP
+instead. 
+.TP
+UNW_IA64_AR_BSPSTORE:
+ Alias for UNW_IA64_GR+18,
+the register\-backing store write pointer. 
+.TP
+UNW_IA64_AR_RNAT:
+ Alias for UNW_IA64_GR+19,
+the register\-backing store NaT\-collection register. 
+.TP
+UNW_IA64_AR_CCV:
+ Alias for UNW_IA64_GR+32,
+the compare\-and\-swap value register. 
+.TP
+UNW_IA64_AR_CSD:
+ Alias for UNW_IA64_GR+25,
+the compare\-and\-swap\-data register (used by 16\-byte atomic operations). 
+.TP
+UNW_IA64_AR_UNAT:
+ Alias for UNW_IA64_GR+36,
+the user NaT\-collection register. 
+.TP
+UNW_IA64_AR_FPSR:
+ Alias for UNW_IA64_GR+40,
+the floating\-point status (and control) register. 
+.TP
+UNW_IA64_AR_PFS:
+ Alias for UNW_IA64_GR+64,
+the previous frame\-state register. 
+.TP
+UNW_IA64_AR_LC:
+ Alias for UNW_IA64_GR+65
+the loop\-count register. 
+.TP
+UNW_IA64_AR_EC:
+ Alias for UNW_IA64_GR+66,
+the epilogue\-count register. 
+.PP
+.SH THE UNWIND\-CONTEXT TYPE
+
+.PP
+On IA\-64, unw_context_t
+is simply an alias for 
+ucontext_t
+(as defined by the Single UNIX Spec). This implies 
+that it is possible to initialize a value of this type not just with 
+unw_getcontext(),
+but also with getcontext(),
+for 
+example. However, since this is an IA\-64\-specific extension to 
+libunwind,
+portable code should not rely on this equivalence. 
+.PP
+.SH SEE ALSO
+
+.PP
+libunwind(3)
+.PP
+.SH AUTHOR
+
+.PP
+David Mosberger\-Tang
+.br
+Email: \fBdmosberger@gmail.com\fP
+.br
+WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
+.\" NOTE: This file is generated, DO NOT EDIT.
diff --git a/src/third_party/unwind/dist/doc/libunwind-ia64.tex b/src/third_party/unwind/dist/doc/libunwind-ia64.tex
new file mode 100644
index 00000000000..c08946dc4b3
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/libunwind-ia64.tex
@@ -0,0 +1,216 @@
+\documentclass{article}
+\usepackage[fancyhdr,pdf]{latex2man}
+
+\input{common.tex}
+
+\begin{document}
+
+\begin{Name}{3}{libunwind-ia64}{David Mosberger-Tang}{Programming Library}{IA-64-specific support in libunwind}libunwind-ia64 -- IA-64-specific support in libunwind
+\end{Name}
+
+
+\section{Introduction}
+
+The IA-64 version of \Prog{libunwind} uses a platform-string of
+\texttt{ia64} and, at least in theory, should be able to support all
+operating systems adhering to the processor-specific ABI defined for
+the Itanium Processor Family.  This includes both little-endian Linux
+and big-endian HP-UX.  Furthermore, to make it possible for a single
+library to unwind both 32- and 64-bit targets, the type
+\Type{unw\_word\_t} is always defined to be 64 bits wide (independent
+of the natural word-size of the host).  Having said that, the current
+implementation has been tested only with IA-64 Linux.
+
+When targeting IA-64, the \Prog{libunwind} header file defines the
+macro \Const{UNW\_TARGET\_IA64} as 1 and the macro \Const{UNW\_TARGET}
+as ``ia64'' (without the quotation marks).  The former makes it
+possible for platform-dependent unwind code to use
+conditional-compilation to select an appropriate implementation.  The
+latter is useful for stringification purposes and to construct
+target-platform-specific symbols.
+
+One special feature of IA-64 is the use of NaT bits to support
+speculative execution.  Often, NaT bits are thought of as the ``65-th
+bit'' of a general register.  However, to make everything fit into
+64-bit wide \Type{unw\_word\_t} values, \Prog{libunwind} treats the
+NaT-bits like separate boolean registers, whose 64-bit value is either
+TRUE (non-zero) or FALSE (zero).
+
+
+\section{Machine-State}
+
+The machine-state (set of registers) that is accessible through
+\Prog{libunwind} depends on the type of stack frame that a cursor
+points to.  For normal frames, all ``preserved'' (callee-saved)
+registers are accessible.  For signal-trampoline frames, all registers
+(including ``scratch'' (caller-saved) registers) are accessible.  Most
+applications do not have to worry a-priori about which registers are
+accessible when.  In case of doubt, it is always safe to \emph{try} to
+access a register (via \Func{unw\_get\_reg}() or
+\Func{unw\_get\_fpreg}()) and if the register isn't accessible, the
+call will fail with a return-value of \texttt{-}\Const{UNW\_EBADREG}.
+
+As a special exception to the above general rule, scratch registers
+\texttt{r15}-\texttt{r18} are always accessible, even in normal
+frames.  This makes it possible to pass arguments, e.g., to exception
+handlers.
+
+For a detailed description of the IA-64 register usage convention,
+please see the ``Itanium Software Conventions and Runtime Architecture
+Guide'', available at:
+\begin{center}
+  \URL{http://www.intel.com/design/itanium/downloads/245358.htm}
+\end{center}
+
+
+\section{Register Names}
+
+The IA-64-version of \Prog{libunwind} defines three kinds of register
+name macros: frame-register macros, normal register macros, and
+convenience macros.  Below, we describe each kind in turn:
+
+
+\subsection{Frame-register Macros}
+
+Frame-registers are special (pseudo) registers because they always
+have a valid value, even though sometimes they do not get saved
+explicitly (e.g., if a memory stack frame is 16 bytes in size, the
+previous stack-pointer value can be calculated simply as
+\texttt{sp+16}, so there is no need to save the stack-pointer
+explicitly).  Moreover, the set of frame register values uniquely
+identifies a stack frame.  The IA-64 architecture defines two stacks
+(a memory and a register stack). Including the instruction-pointer
+(IP), this means there are three frame registers:
+\begin{Description}
+\item[\Const{UNW\_IA64\_IP}:] Contains the instruction pointer (IP, or
+  ``program counter'') of the current stack frame.  Given this value,
+  the remaining machine-state corresponds to the register-values that
+  were present in the CPU when it was just about to execute the
+  instruction pointed to by \Const{UNW\_IA64\_IP}.  Bits 0 and 1 of
+  this frame-register encode the slot number of the instruction.
+  \textbf{Note:} Due to the way the call instruction works on IA-64,
+  the slot number is usually zero, but can be non-zero, e.g., in the
+  stack-frame of a signal-handler trampoline.
+\item[\Const{UNW\_IA64\_SP}:] Contains the (memory) stack-pointer
+  value (SP).
+\item[\Const{UNW\_IA64\_BSP}:] Contains the register backing-store
+  pointer (BSP).  \textbf{Note:} the value in this register is equal
+  to the contents of register \texttt{ar.bsp} at the time the
+  instruction at \Const{UNW\_IA64\_IP} was about to begin execution.
+\end{Description}
+
+
+\subsection{Normal Register Macros}
+
+The following normal register name macros are available:
+\begin{Description}
+\item[\Const{UNW\_IA64\_GR}:] The base-index for general (integer)
+  registers.  Add an index in the range from 0..127 to get a
+  particular general register.  For example, to access \texttt{r4},
+  the index \Const{UNW\_IA64\_GR}\texttt{+4} should be used.
+  Registers \texttt{r0} and \texttt{r1} (\texttt{gp}) are read-only,
+  and any attempt to write them will result in an error
+  (\texttt{-}\Const{UNW\_EREADONLYREG}).  Even though \texttt{r1} is
+  read-only, \Prog{libunwind} will automatically adjust its value if
+  the instruction-pointer (\Const{UNW\_IA64\_IP}) is modified.  For
+  example, if \Const{UNW\_IA64\_IP} is set to a value inside a
+  function \Func{func}(), then reading
+  \Const{UNW\_IA64\_GR}\texttt{+1} will return the global-pointer
+  value for this function.
+\item[\Const{UNW\_IA64\_NAT}:] The base-index for the NaT bits of the
+  general (integer) registers.  A non-zero value in these registers
+  corresponds to a set NaT-bit.  Add an index in the range from 0..127
+  to get a particular NaT-bit register.  For example, to access the
+  NaT bit of \texttt{r4}, the index \Const{UNW\_IA64\_NAT}\texttt{+4}
+  should be used.
+\item[\Const{UNW\_IA64\_FR}:] The base-index for floating-point
+  registers.  Add an index in the range from 0..127 to get a
+  particular floating-point register.  For example, to access
+  \texttt{f2}, the index \Const{UNW\_IA64\_FR}\texttt{+2} should be
+  used.  Registers \texttt{f0} and \texttt{f1} are read-only, and any
+  attempt to write to indices \Const{UNW\_IA64\_FR}\texttt{+0} or
+  \Const{UNW\_IA64\_FR}\texttt{+1} will result in an error
+  (\texttt{-}\Const{UNW\_EREADONLYREG}).
+\item[\Const{UNW\_IA64\_AR}:] The base-index for application
+  registers.  Add an index in the range from 0..127 to get a
+  particular application register.  For example, to access
+  \texttt{ar40}, the index \Const{UNW\_IA64\_AR}\texttt{+40} should be
+  used.  The IA-64 architecture defines several application registers
+  as ``reserved for future use''.  Attempting to access such registers
+  results in an error (\texttt{-}\Const{UNW\_EBADREG}).
+\item[\Const{UNW\_IA64\_BR}:] The base-index for branch registers.
+  Add an index in the range from 0..7 to get a particular branch
+  register.  For example, to access \texttt{b6}, the index
+  \Const{UNW\_IA64\_BR}\texttt{+6} should be used.
+\item[\Const{UNW\_IA64\_PR}:] Contains the set of predicate registers.
+  This 64-bit wide register contains registers \texttt{p0} through
+  \texttt{p63} in the ``broad-side'' format.  Just like with the
+  ``move predicates'' instruction, the registers are mapped as if
+  \texttt{CFM.rrb.pr} were set to 0.  Thus, in general the value of
+  predicate register \texttt{p}$N$ with $N$>=16 can be found
+  in bit \texttt{16 + (($N$-16)+CFM.rrb.pr) \% 48}.
+\item[\Const{UNW\_IA64\_CFM}:] Contains the current-frame-mask
+  register.
+\end{Description}
+
+
+\subsection{Convenience Macros}
+
+Convenience macros are simply aliases for certain frequently used
+registers:
+\begin{Description}
+\item[\Const{UNW\_IA64\_GP}:] Alias for \Const{UNW\_IA64\_GR}\texttt{+1},
+  the global-pointer register.
+\item[\Const{UNW\_IA64\_TP}:] Alias for \Const{UNW\_IA64\_GR}\texttt{+13},
+  the thread-pointer register.
+\item[\Const{UNW\_IA64\_AR\_RSC}:] Alias for \Const{UNW\_IA64\_GR}\texttt{+16},
+  the register-stack configuration register.
+\item[\Const{UNW\_IA64\_AR\_BSP}:] Alias for
+  \Const{UNW\_IA64\_GR}\texttt{+17}.  This register index accesses the
+  value of register \texttt{ar.bsp} as of the time it was last saved
+  explicitly.  This is rarely what you want.  Normally, you'll want to
+  use \Const{UNW\_IA64\_BSP} instead.
+\item[\Const{UNW\_IA64\_AR\_BSPSTORE}:] Alias for \Const{UNW\_IA64\_GR}\texttt{+18},
+  the register-backing store write pointer.
+\item[\Const{UNW\_IA64\_AR\_RNAT}:] Alias for \Const{UNW\_IA64\_GR}\texttt{+19},
+  the register-backing store NaT-collection register.
+\item[\Const{UNW\_IA64\_AR\_CCV}:] Alias for \Const{UNW\_IA64\_GR}\texttt{+32},
+  the compare-and-swap value register.
+\item[\Const{UNW\_IA64\_AR\_CSD}:] Alias for \Const{UNW\_IA64\_GR}\texttt{+25},
+  the compare-and-swap-data register (used by 16-byte atomic operations).
+\item[\Const{UNW\_IA64\_AR\_UNAT}:] Alias for \Const{UNW\_IA64\_GR}\texttt{+36},
+  the user NaT-collection register.
+\item[\Const{UNW\_IA64\_AR\_FPSR}:] Alias for \Const{UNW\_IA64\_GR}\texttt{+40},
+  the floating-point status (and control) register.
+\item[\Const{UNW\_IA64\_AR\_PFS}:] Alias for \Const{UNW\_IA64\_GR}\texttt{+64},
+  the previous frame-state register.
+\item[\Const{UNW\_IA64\_AR\_LC}:] Alias for \Const{UNW\_IA64\_GR}\texttt{+65}
+  the loop-count register.
+\item[\Const{UNW\_IA64\_AR\_EC}:] Alias for \Const{UNW\_IA64\_GR}\texttt{+66},
+  the epilogue-count register.
+\end{Description}
+
+
+\section{The Unwind-Context Type}
+
+On IA-64, \Type{unw\_context\_t} is simply an alias for
+\Type{ucontext\_t} (as defined by the Single UNIX Spec).  This implies
+that it is possible to initialize a value of this type not just with
+\Func{unw\_getcontext}(), but also with \Func{getcontext}(), for
+example.  However, since this is an IA-64-specific extension to
+\Prog{libunwind}, portable code should not rely on this equivalence.
+
+
+\section{See Also}
+
+\SeeAlso{libunwind(3)}
+
+\section{Author}
+
+\noindent
+David Mosberger-Tang\\
+Email: \Email{dmosberger@gmail.com}\\
+WWW: \URL{http://www.nongnu.org/libunwind/}.
+\LatexManEnd
+
+\end{document}
diff --git a/src/third_party/unwind/dist/doc/libunwind-ptrace.man b/src/third_party/unwind/dist/doc/libunwind-ptrace.man
new file mode 100644
index 00000000000..985fcae2753
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/libunwind-ptrace.man
@@ -0,0 +1,220 @@
+'\" t
+.\" Manual page created with latex2man on Thu Aug 16 09:44:44 MDT 2007
+.\" NOTE: This file is generated, DO NOT EDIT.
+.de Vb
+.ft CW
+.nf
+..
+.de Ve
+.ft R
+
+.fi
+..
+.TH "LIBUNWIND\-PTRACE" "3" "16 August 2007" "Programming Library " "Programming Library "
+.SH NAME
+libunwind\-ptrace
+\-\- ptrace() support in libunwind 
+.PP
+.SH SYNOPSIS
+
+.PP
+#include <libunwind\-ptrace.h>
+.br
+.PP
+unw_accessors_t
+_UPT_accessors;
+.br
+.PP
+void *_UPT_create(pid_t);
+.br
+void
+_UPT_destroy(void *);
+.br
+.PP
+int
+_UPT_find_proc_info(unw_addr_space_t,
+unw_word_t,
+unw_proc_info_t *,
+int,
+void *);
+.br
+void
+_UPT_put_unwind_info(unw_addr_space_t,
+unw_proc_info_t *,
+void *);
+.br
+int
+_UPT_get_dyn_info_list_addr(unw_addr_space_t,
+unw_word_t *,
+void *);
+.br
+int
+_UPT_access_mem(unw_addr_space_t,
+unw_word_t,
+unw_word_t *,
+int,
+void *);
+.br
+int
+_UPT_access_reg(unw_addr_space_t,
+unw_regnum_t,
+unw_word_t *,
+int,
+void *);
+.br
+int
+_UPT_access_fpreg(unw_addr_space_t,
+unw_regnum_t,
+unw_fpreg_t *,
+int,
+void *);
+.br
+int
+_UPT_get_proc_name(unw_addr_space_t,
+unw_word_t,
+char *,
+size_t,
+unw_word_t *,
+void *);
+.br
+int
+_UPT_resume(unw_addr_space_t,
+unw_cursor_t *,
+void *);
+.br
+.PP
+.SH DESCRIPTION
+
+.PP
+The ptrace(2)
+system\-call makes it possible for a process to 
+gain access to the machine\-state and virtual memory of \fIanother\fP
+process. With the right set of call\-back routines, it is therefore 
+possible to hook up libunwind
+to another process via 
+ptrace(2).
+While it\&'s not very difficult to do so directly, 
+libunwind
+further facilitates this task by providing 
+ready\-to\-use callbacks for this purpose. The routines and variables 
+implementing this facility use a name\-prefix of _UPT,
+which is 
+stands for ``unwind\-via\-ptrace\&''\&. 
+.PP
+An application that wants to use the _UPT\-facility
+first needs 
+to create a new libunwind
+address\-space that represents the 
+target process. This is done by calling 
+unw_create_addr_space().
+In many cases, the application 
+will simply want to pass the address of _UPT_accessors
+as the 
+first argument to this routine. Doing so will ensure that 
+libunwind
+will be able to properly unwind the target process. 
+However, in special circumstances, an application may prefer to use 
+only portions of the _UPT\-facility.
+For this reason, the 
+individual callback routines (_UPT_find_proc_info(),
+_UPT_put_unwind_info(),
+etc.) are also available for direct 
+use. Of course, the addresses of these routines could also be picked 
+up from _UPT_accessors,
+but doing so would prevent static 
+initialization. Also, when using _UPT_accessors,
+\fIall\fP
+the callback routines will be linked into the application, even if 
+they are never actually called. 
+.PP
+Next, the application can turn on ptrace\-mode on the target process, 
+either by forking a new process, invoking PTRACE_TRACEME,
+and 
+then starting the target program (via execve(2)),
+or by 
+directly attaching to an already running process (via 
+PTRACE_ATTACH).
+Either way, once the process\-ID (pid) of the 
+target process is known, a _UPT\-info\-structure
+can be created 
+by calling _UPT_create(),
+passing the pid of the target process 
+as the only argument. The returned void\-pointer then needs to be 
+passed as the ``argument\&'' pointer (third argument) to 
+unw_init_remote().
+.PP
+The _UPT_resume()
+routine can be used to resume execution of 
+the target process. It simply invokes ptrace(2)
+with a command 
+value of PTRACE_CONT\&.
+.PP
+When the application is done using libunwind
+on the target 
+process, _UPT_destroy()
+needs to be called, passing it the 
+void\-pointer that was returned by the corresponding call to 
+_UPT_create().
+This ensures that all memory and other 
+resources are freed up. 
+.PP
+.SH AVAILABILITY
+
+.PP
+Since ptrace(2)
+works within a single machine only, the 
+_UPT\-facility
+by definition is not available in 
+libunwind\-versions
+configured for cross\-unwinding. 
+.PP
+.SH THREAD SAFETY
+
+.PP
+The _UPT\-facility
+assumes that a single _UPT\-info
+structure is never shared between threads. Because of this, no 
+explicit locking is used. As long as only one thread uses 
+a _UPT\-info
+structure at any given time, this facility 
+is thread\-safe. 
+.PP
+.SH RETURN VALUE
+
+.PP
+_UPT_create()
+may return a NULL
+pointer if it fails 
+to create the _UPT\-info\-structure
+for any reason. For the 
+current implementation, the only reason this call may fail is when the 
+system is out of memory. 
+.PP
+.SH FILES
+
+.PP
+.TP
+libunwind\-ptrace.h
+ Headerfile to include when using the 
+interface defined by this library. 
+.TP
+\fB\-l\fPunwind\-ptrace \fB\-l\fPunwind\-generic
+ Linker\-switches to add when building a program that uses the 
+functions defined by this library. 
+.PP
+.SH SEE ALSO
+
+.PP
+execve(2), 
+libunwind(3),
+ptrace(2) 
+.PP
+.SH AUTHOR
+
+.PP
+David Mosberger\-Tang
+.br
+Email: \fBdmosberger@gmail.com\fP
+.br
+WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
+.\" NOTE: This file is generated, DO NOT EDIT.
diff --git a/src/third_party/unwind/dist/doc/libunwind-ptrace.tex b/src/third_party/unwind/dist/doc/libunwind-ptrace.tex
new file mode 100644
index 00000000000..fe074d86191
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/libunwind-ptrace.tex
@@ -0,0 +1,134 @@
+\documentclass{article}
+\usepackage[fancyhdr,pdf]{latex2man}
+
+\input{common.tex}
+
+\begin{document}
+
+\begin{Name}{3}{libunwind-ptrace}{David Mosberger-Tang}{Programming Library}{ptrace() support in libunwind}libunwind-ptrace -- ptrace() support in libunwind
+\end{Name}
+
+\section{Synopsis}
+
+\File{\#include $<$libunwind-ptrace.h$>$}\\
+
+\noindent
+\Type{unw\_accessors\_t} \Var{\_UPT\_accessors};\\
+
+\Type{void~*}\Func{\_UPT\_create}(\Type{pid\_t});\\
+\noindent
+\Type{void} \Func{\_UPT\_destroy}(\Type{void~*});\\
+
+\noindent
+\Type{int} \Func{\_UPT\_find\_proc\_info}(\Type{unw\_addr\_space\_t}, \Type{unw\_word\_t}, \Type{unw\_proc\_info\_t~*}, \Type{int}, \Type{void~*});\\
+\noindent
+\Type{void} \Func{\_UPT\_put\_unwind\_info}(\Type{unw\_addr\_space\_t}, \Type{unw\_proc\_info\_t~*}, \Type{void~*});\\
+\noindent
+\Type{int} \Func{\_UPT\_get\_dyn\_info\_list\_addr}(\Type{unw\_addr\_space\_t}, \Type{unw\_word\_t~*}, \Type{void~*});\\
+\noindent
+\Type{int} \Func{\_UPT\_access\_mem}(\Type{unw\_addr\_space\_t}, \Type{unw\_word\_t}, \Type{unw\_word\_t~*}, \Type{int}, \Type{void~*});\\
+\noindent
+\Type{int} \Func{\_UPT\_access\_reg}(\Type{unw\_addr\_space\_t}, \Type{unw\_regnum\_t}, \Type{unw\_word\_t~*}, \Type{int}, \Type{void~*});\\
+\noindent
+\Type{int} \Func{\_UPT\_access\_fpreg}(\Type{unw\_addr\_space\_t}, \Type{unw\_regnum\_t}, \Type{unw\_fpreg\_t~*}, \Type{int}, \Type{void~*});\\
+\noindent
+\Type{int} \Func{\_UPT\_get\_proc\_name}(\Type{unw\_addr\_space\_t}, \Type{unw\_word\_t}, \Type{char~*}, \Type{size\_t}, \Type{unw\_word\_t~*}, \Type{void~*});\\
+\noindent
+\Type{int} \Func{\_UPT\_resume}(\Type{unw\_addr\_space\_t}, \Type{unw\_cursor\_t~*}, \Type{void~*});\\
+
+\section{Description}
+
+The \Func{ptrace}(2) system-call makes it possible for a process to
+gain access to the machine-state and virtual memory of \emph{another}
+process.  With the right set of call-back routines, it is therefore
+possible to hook up \Prog{libunwind} to another process via
+\Func{ptrace}(2).  While it's not very difficult to do so directly,
+\Prog{libunwind} further facilitates this task by providing
+ready-to-use callbacks for this purpose.  The routines and variables
+implementing this facility use a name-prefix of \Func{\_UPT}, which is
+stands for ``unwind-via-ptrace''.
+
+An application that wants to use the \Func{\_UPT}-facility first needs
+to create a new \Prog{libunwind} address-space that represents the
+target process.  This is done by calling
+\Func{unw\_create\_addr\_space}().  In many cases, the application
+will simply want to pass the address of \Var{\_UPT\_accessors} as the
+first argument to this routine.  Doing so will ensure that
+\Prog{libunwind} will be able to properly unwind the target process.
+However, in special circumstances, an application may prefer to use
+only portions of the \Prog{\_UPT}-facility.  For this reason, the
+individual callback routines (\Func{\_UPT\_find\_proc\_info}(),
+\Func{\_UPT\_put\_unwind\_info}(), etc.)  are also available for direct
+use.  Of course, the addresses of these routines could also be picked
+up from \Var{\_UPT\_accessors}, but doing so would prevent static
+initialization.  Also, when using \Var{\_UPT\_accessors}, \emph{all}
+the callback routines will be linked into the application, even if
+they are never actually called.
+
+Next, the application can turn on ptrace-mode on the target process,
+either by forking a new process, invoking \Const{PTRACE\_TRACEME}, and
+then starting the target program (via \Func{execve}(2)), or by
+directly attaching to an already running process (via
+\Const{PTRACE\_ATTACH}).  Either way, once the process-ID (pid) of the
+target process is known, a \Prog{\_UPT}-info-structure can be created
+by calling \Func{\_UPT\_create}(), passing the pid of the target process
+as the only argument.  The returned void-pointer then needs to be
+passed as the ``argument'' pointer (third argument) to
+\Func{unw\_init\_remote}().
+
+The \Func{\_UPT\_resume}() routine can be used to resume execution of
+the target process.  It simply invokes \Func{ptrace}(2) with a command
+value of \Const{PTRACE\_CONT}.
+
+When the application is done using \Prog{libunwind} on the target
+process, \Func{\_UPT\_destroy}() needs to be called, passing it the
+void-pointer that was returned by the corresponding call to
+\Func{\_UPT\_create}().  This ensures that all memory and other
+resources are freed up.
+
+\section{Availability}
+
+Since \Func{ptrace}(2) works within a single machine only, the
+\Prog{\_UPT}-facility by definition is not available in
+\Prog{libunwind}-versions configured for cross-unwinding.
+
+\section{Thread Safety}
+
+The \Prog{\_UPT}-facility assumes that a single \Prog{\_UPT}-info
+structure is never shared between threads.  Because of this, no
+explicit locking is used.  As long as only one thread uses
+a \Prog{\_UPT}-info structure at any given time, this facility
+is thread-safe.
+
+\section{Return Value}
+
+\Func{\_UPT\_create}() may return a \Const{NULL} pointer if it fails
+to create the \Prog{\_UPT}-info-structure for any reason.  For the
+current implementation, the only reason this call may fail is when the
+system is out of memory.
+
+\section{Files}
+
+\begin{Description}
+\item[\File{libunwind-ptrace.h}] Headerfile to include when using the
+  interface defined by this library.
+\item[\Opt{-l}\File{unwind-ptrace} \Opt{-l}\File{unwind-generic}]
+    Linker-switches to add when building a program that uses the
+    functions defined by this library.
+\end{Description}
+
+\section{See Also}
+
+execve(2),
+\SeeAlso{libunwind(3)},
+ptrace(2)
+
+\section{Author}
+
+\noindent
+David Mosberger-Tang\\
+Email: \Email{dmosberger@gmail.com}\\
+WWW: \URL{http://www.nongnu.org/libunwind/}.
+\LatexManEnd
+
+\end{document}
diff --git a/src/third_party/unwind/dist/doc/libunwind-setjmp.man b/src/third_party/unwind/dist/doc/libunwind-setjmp.man
new file mode 100644
index 00000000000..1faa38e475d
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/libunwind-setjmp.man
@@ -0,0 +1,132 @@
+'\" t
+.\" Manual page created with latex2man on Thu Aug 16 09:44:44 MDT 2007
+.\" NOTE: This file is generated, DO NOT EDIT.
+.de Vb
+.ft CW
+.nf
+..
+.de Ve
+.ft R
+
+.fi
+..
+.TH "LIBUNWIND\-SETJMP" "3" "16 August 2007" "Programming Library " "Programming Library "
+.SH NAME
+libunwind\-setjmp
+\-\- libunwind\-based non\-local gotos 
+.PP
+.SH SYNOPSIS
+
+.PP
+#include <setjmp.h>
+.br
+.PP
+int
+setjmp(jmp_buf env);
+.br
+void
+longjmp(jmp_buf env,
+int val);
+.br
+int
+_setjmp(jmp_buf env);
+.br
+void
+_longjmp(jmp_buf env,
+int val);
+.br
+int
+sigsetjmp(sigjmp_buf env,
+int savemask);
+.br
+void
+siglongjmp(sigjmp_buf env,
+int val);
+.br
+.PP
+.SH DESCRIPTION
+
+.PP
+The unwind\-setjmp
+library offers a libunwind\-based
+implementation of non\-local gotos. This implementation is intended to 
+be a drop\-in replacement for the normal, system\-provided routines of 
+the same name. The main advantage of using the unwind\-setjmp
+library is that setting up a non\-local goto via one of the 
+setjmp()
+routines is very fast. Typically, just 2 or 3 words 
+need to be saved in the jump\-buffer (plus one call to 
+sigprocmask(2),
+in the case of sigsetjmp).
+On the 
+other hand, executing a non\-local goto by calling one of the 
+longjmp()
+routines tends to be much slower than with the 
+system\-provided routines. In fact, the time spent on a 
+longjmp()
+will be proportional to the number of call frames 
+that exist between the points where setjmp()
+and 
+longjmp()
+were called. For this reason, the 
+unwind\-setjmp
+library is beneficial primarily in applications 
+that frequently call setjmp()
+but only rarely call 
+longjmp().
+.PP
+.SH CAVEATS
+
+.PP
+.TP
+.B *
+The correct operation of this library depends on the presence of 
+correct unwind information. On newer platforms, this is rarely an 
+issue. On older platforms, care needs to be taken to 
+ensure that each of the functions whose stack frames may have to be 
+unwound during a longjmp()
+have correct unwind information 
+(on those platforms, there is usually a compiler\-switch, such as 
+\fB\-funwind\-tables\fP,
+to request the generation of unwind 
+information). 
+.TP
+.B *
+The contents of jmp_buf and sigjmp_buf as setup
+and used by these routines is completely different from the ones 
+used by the system\-provided routines. Thus, a jump\-buffer created 
+by the libunwind\-based setjmp()/_setjmp
+may only be 
+used in a call to the libunwind\-based 
+longjmp()/_longjmp().
+The analogous applies for 
+sigjmp_buf
+with sigsetjmp()
+and siglongjmp().
+.PP
+.SH FILES
+
+.PP
+.TP
+\fB\-l\fPunwind\-setjmp
+ The library an application should 
+be linked against to ensure it uses the libunwind\-based non\-local 
+goto routines. 
+.PP
+.SH SEE ALSO
+
+.PP
+libunwind(3),
+setjmp(3), longjmp(3), 
+_setjmp(3), _longjmp(3), 
+sigsetjmp(3), siglongjmp(3) 
+.PP
+.SH AUTHOR
+
+.PP
+David Mosberger\-Tang
+.br
+Email: \fBdmosberger@gmail.com\fP
+.br
+WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
+.\" NOTE: This file is generated, DO NOT EDIT.
diff --git a/src/third_party/unwind/dist/doc/libunwind-setjmp.tex b/src/third_party/unwind/dist/doc/libunwind-setjmp.tex
new file mode 100644
index 00000000000..17ce073186a
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/libunwind-setjmp.tex
@@ -0,0 +1,87 @@
+\documentclass{article}
+\usepackage[fancyhdr,pdf]{latex2man}
+
+\input{common.tex}
+
+\begin{document}
+
+\begin{Name}{3}{libunwind-setjmp}{David Mosberger-Tang}{Programming Library}{libunwind-based non-local gotos}libunwind-setjmp -- libunwind-based non-local gotos
+\end{Name}
+
+\section{Synopsis}
+
+\File{\#include $<$setjmp.h$>$}\\
+
+\noindent
+\Type{int} \Func{setjmp}(\Type{jmp\_buf}~\Var{env});\\
+\Type{void} \Func{longjmp}(\Type{jmp\_buf}~\Var{env}, \Type{int}~\Var{val});\\
+\Type{int} \Func{\_setjmp}(\Type{jmp\_buf}~\Var{env});\\
+\Type{void} \Func{\_longjmp}(\Type{jmp\_buf}~\Var{env}, \Type{int}~\Var{val});\\
+\Type{int} \Func{sigsetjmp}(\Type{sigjmp\_buf}~\Var{env}, \Type{int}~\Var{savemask});\\
+\Type{void} \Func{siglongjmp}(\Type{sigjmp\_buf}~\Var{env}, \Type{int}~\Var{val});\\
+
+\section{Description}
+
+The \Prog{unwind-setjmp} library offers a \Prog{libunwind}-based
+implementation of non-local gotos.  This implementation is intended to
+be a drop-in replacement for the normal, system-provided routines of
+the same name.  The main advantage of using the \Prog{unwind-setjmp}
+library is that setting up a non-local goto via one of the
+\Func{setjmp}() routines is very fast.  Typically, just 2 or 3 words
+need to be saved in the jump-buffer (plus one call to
+\Func{sigprocmask}(2), in the case of \Func{sigsetjmp}).  On the
+other hand, executing a non-local goto by calling one of the
+\Func{longjmp}() routines tends to be much slower than with the
+system-provided routines.  In fact, the time spent on a
+\Func{longjmp}() will be proportional to the number of call frames
+that exist between the points where \Func{setjmp}() and
+\Func{longjmp}() were called.  For this reason, the
+\Prog{unwind-setjmp} library is beneficial primarily in applications
+that frequently call \Func{setjmp}() but only rarely call
+\Func{longjmp}().
+
+\section{Caveats}
+
+\begin{itemize}
+\item The correct operation of this library depends on the presence of
+  correct unwind information.  On newer platforms, this is rarely an
+  issue.  On older platforms, care needs to be taken to
+  ensure that each of the functions whose stack frames may have to be
+  unwound during a \Func{longjmp}() have correct unwind information
+  (on those platforms, there is usually a compiler-switch, such as
+  \Opt{-funwind-tables}, to request the generation of unwind
+  information).
+\item The contents of \Type{jmp\_buf} and \Type{sigjmp\_buf} as setup
+  and used by these routines is completely different from the ones
+  used by the system-provided routines.  Thus, a jump-buffer created
+  by the libunwind-based \Func{setjmp}()/\Func{\_setjmp} may only be
+  used in a call to the libunwind-based
+  \Func{longjmp}()/\Func{\_longjmp}().  The analogous applies for
+  \Type{sigjmp\_buf} with \Func{sigsetjmp}() and \Func{siglongjmp}().
+\end{itemize}
+
+\section{Files}
+
+\begin{Description}
+\item[\Opt{-l}\File{unwind-setjmp}] The library an application should
+  be linked against to ensure it uses the libunwind-based non-local
+  goto routines.
+\end{Description}
+
+
+\section{See Also}
+
+\SeeAlso{libunwind(3)},
+setjmp(3), longjmp(3),
+\_setjmp(3), \_longjmp(3),
+sigsetjmp(3), siglongjmp(3)
+
+\section{Author}
+
+\noindent
+David Mosberger-Tang\\
+Email: \Email{dmosberger@gmail.com}\\
+WWW: \URL{http://www.nongnu.org/libunwind/}.
+\LatexManEnd
+
+\end{document}
diff --git a/src/third_party/unwind/dist/doc/libunwind.man b/src/third_party/unwind/dist/doc/libunwind.man
new file mode 100644
index 00000000000..02ab6b89374
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/libunwind.man
@@ -0,0 +1,508 @@
+'\" t
+.\" Manual page created with latex2man on Thu Jan 12 06:50:29 PST 2017
+.\" NOTE: This file is generated, DO NOT EDIT.
+.de Vb
+.ft CW
+.nf
+..
+.de Ve
+.ft R
+
+.fi
+..
+.TH "LIBUNWIND" "3" "12 January 2017" "Programming Library " "Programming Library "
+.SH NAME
+libunwind
+\-\- a (mostly) platform\-independent unwind API 
+.PP
+.SH SYNOPSIS
+
+.PP
+#include <libunwind.h>
+.br
+.PP
+int
+unw_getcontext(unw_context_t *);
+.br
+int
+unw_init_local(unw_cursor_t *,
+unw_context_t *);
+.br
+int
+unw_init_remote(unw_cursor_t *,
+unw_addr_space_t,
+void *);
+.br
+int
+unw_step(unw_cursor_t *);
+.br
+int
+unw_get_reg(unw_cursor_t *,
+unw_regnum_t,
+unw_word_t *);
+.br
+int
+unw_get_fpreg(unw_cursor_t *,
+unw_regnum_t,
+unw_fpreg_t *);
+.br
+int
+unw_set_reg(unw_cursor_t *,
+unw_regnum_t,
+unw_word_t);
+.br
+int
+unw_set_fpreg(unw_cursor_t *,
+unw_regnum_t,
+unw_fpreg_t);
+.br
+int
+unw_resume(unw_cursor_t *);
+.br
+.PP
+unw_addr_space_t
+unw_local_addr_space;
+.br
+unw_addr_space_t
+unw_create_addr_space(unw_accessors_t,
+int);
+.br
+void
+unw_destroy_addr_space(unw_addr_space_t);
+.br
+unw_accessors_t
+unw_get_accessors(unw_addr_space_t);
+.br
+void
+unw_flush_cache(unw_addr_space_t,
+unw_word_t,
+unw_word_t);
+.br
+int
+unw_set_caching_policy(unw_addr_space_t,
+unw_caching_policy_t);
+.br
+int
+unw_set_cache_size(unw_addr_space_t,
+size_t,
+int);
+.br
+.PP
+const char *unw_regname(unw_regnum_t);
+.br
+int
+unw_get_proc_info(unw_cursor_t *,
+unw_proc_info_t *);
+.br
+int
+unw_get_save_loc(unw_cursor_t *,
+int,
+unw_save_loc_t *);
+.br
+int
+unw_is_fpreg(unw_regnum_t);
+.br
+int
+unw_is_signal_frame(unw_cursor_t *);
+.br
+int
+unw_get_proc_name(unw_cursor_t *,
+char *,
+size_t,
+unw_word_t *);
+.br
+.PP
+void
+_U_dyn_register(unw_dyn_info_t *);
+.br
+void
+_U_dyn_cancel(unw_dyn_info_t *);
+.br
+.PP
+.SH LOCAL UNWINDING
+
+.PP
+Libunwind
+is very easy to use when unwinding a stack from 
+within a running program. This is called \fIlocal\fP
+unwinding. Say 
+you want to unwind the stack while executing in some function 
+F().
+In this function, you would call unw_getcontext()
+to get a snapshot of the CPU registers (machine\-state). Then you 
+initialize an \fIunwind cursor\fP
+based on this snapshot. This is 
+done with a call to unw_init_local().
+The cursor now points 
+to the current frame, that is, the stack frame that corresponds to the 
+current activation of function F().
+The unwind cursor can then 
+be moved ``up\&'' (towards earlier stack frames) by calling 
+unw_step().
+By repeatedly calling this routine, you can 
+uncover the entire call\-chain that led to the activation of function 
+F().
+A positive return value from unw_step()
+indicates 
+that there are more frames in the chain, zero indicates that the end 
+of the chain has been reached, and any negative value indicates that 
+some sort of error has occurred. 
+.PP
+While it is not possible to directly move the unwind cursor in the 
+``down\&'' direction (towards newer stack frames), this effect can be 
+achieved by making copies of an unwind cursor. For example, a program 
+that sometimes has to move ``down\&'' by one stack frame could maintain 
+two cursor variables: ``curr\&''
+and ``prev\&''\&.
+The former 
+would be used as the current cursor and prev
+would be maintained 
+as the ``previous frame\&'' cursor by copying the contents of curr
+to prev
+right before calling unw_step().
+With this 
+approach, the program could move one step ``down\&'' simply by copying 
+back prev
+to curr
+whenever that is necessary. In the most 
+extreme case, a program could maintain a separate cursor for each call 
+frame and that way it could move up and down the callframe\-chain at 
+will. 
+.PP
+Given an unwind cursor, it is possible to read and write the CPU 
+registers that were preserved for the current stack frame (as 
+identified by the cursor). Libunwind
+provides several routines 
+for this purpose: unw_get_reg()
+reads an integer (general) 
+register, unw_get_fpreg()
+reads a floating\-point register, 
+unw_set_reg()
+writes an integer register, and 
+unw_set_fpreg()
+writes a floating\-point register. Note that, 
+by definition, only the \fIpreserved\fP
+machine state can be accessed 
+during an unwind operation. Normally, this state consists of the 
+\fIcallee\-saved\fP
+(``preserved\&'') registers. However, in some 
+special circumstances (e.g., in a signal handler trampoline), even the 
+\fIcaller\-saved\fP
+(``scratch\&'') registers are preserved in the stack 
+frame and, in those cases, libunwind
+will grant access to them 
+as well. The exact set of registers that can be accessed via the 
+cursor depends, of course, on the platform. However, there are two 
+registers that can be read on all platforms: the instruction pointer 
+(IP), sometimes also known as the ``program counter\&'', and the stack 
+pointer (SP). In libunwind,
+these registers are identified by 
+the macros UNW_REG_IP
+and UNW_REG_SP,
+respectively. 
+.PP
+Besides just moving the unwind cursor and reading/writing saved 
+registers, libunwind
+also provides the ability to resume 
+execution at an arbitrary stack frame. As you might guess, this is 
+useful for implementing non\-local gotos and the exception handling 
+needed by some high\-level languages such as Java. Resuming execution 
+with a particular stack frame simply requires calling 
+unw_resume()
+and passing the cursor identifying the target 
+frame as the only argument. 
+.PP
+Normally, libunwind
+supports both local and remote unwinding 
+(the latter will be explained in the next section). However, if you 
+tell libunwind that your program only needs local unwinding, then a 
+special implementation can be selected which may run much faster than 
+the generic implementation which supports both kinds of unwinding. To 
+select this optimized version, simply define the macro 
+UNW_LOCAL_ONLY
+before including the headerfile 
+<libunwind.h>\&.
+It is perfectly OK for a single program to 
+employ both local\-only and generic unwinding. That is, whether or not 
+UNW_LOCAL_ONLY
+is defined is a choice that each source\-file 
+(compilation\-unit) can make on its own. Independent of the setting(s) 
+of UNW_LOCAL_ONLY,
+you\&'ll always link the same library into 
+the program (normally \fB\-l\fPunwind).
+Furthermore, the 
+portion of libunwind
+that manages unwind\-info for dynamically 
+generated code is not affected by the setting of 
+UNW_LOCAL_ONLY\&.
+.PP
+If we put all of the above together, here is how we could use 
+libunwind
+to write a function ``show_backtrace()\&''
+which prints a classic stack trace: 
+.PP
+.Vb
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+
+void show_backtrace (void) {
+  unw_cursor_t cursor; unw_context_t uc;
+  unw_word_t ip, sp;
+
+  unw_getcontext(&uc);
+  unw_init_local(&cursor, &uc);
+  while (unw_step(&cursor) > 0) {
+    unw_get_reg(&cursor, UNW_REG_IP, &ip);
+    unw_get_reg(&cursor, UNW_REG_SP, &sp);
+    printf ("ip = %lx, sp = %lx\\n", (long) ip, (long) sp);
+  }
+}
+.Ve
+.PP
+.SH REMOTE UNWINDING
+
+.PP
+Libunwind
+can also be used to unwind a stack in a ``remote\&'' 
+process. Here, ``remote\&'' may mean another process on the same 
+machine or even a process on a completely different machine from the 
+one that is running libunwind\&.
+Remote unwinding is typically 
+used by debuggers and instruction\-set simulators, for example. 
+.PP
+Before you can unwind a remote process, you need to create a new 
+address\-space object for that process. This is achieved with the 
+unw_create_addr_space()
+routine. The routine takes two 
+arguments: a pointer to a set of \fIaccessor\fP
+routines and an 
+integer that specifies the byte\-order of the target process. The 
+accessor routines provide libunwind
+with the means to 
+communicate with the remote process. In particular, there are 
+callbacks to read and write the process\&'s memory, its registers, and 
+to access unwind information which may be needed by libunwind\&.
+.PP
+With the address space created, unwinding can be initiated by a call 
+to unw_init_remote().
+This routine is very similar to 
+unw_init_local(),
+except that it takes an address\-space 
+object and an opaque pointer as arguments. The routine uses these 
+arguments to fetch the initial machine state. Libunwind
+never 
+uses the opaque pointer on its own, but instead just passes it on to 
+the accessor (callback) routines. Typically, this pointer is used to 
+select, e.g., the thread within a process that is to be unwound. 
+.PP
+Once a cursor has been initialized with unw_init_remote(),
+unwinding works exactly like in the local case. That is, you can use 
+unw_step()
+to move ``up\&'' in the call\-chain, read and write 
+registers, or resume execution at a particular stack frame by calling 
+unw_resume\&.
+.PP
+.SH CROSS\-PLATFORM AND MULTI\-PLATFORM UNWINDING
+
+.PP
+Libunwind
+has been designed to enable unwinding across 
+platforms (architectures). Indeed, a single program can use 
+libunwind
+to unwind an arbitrary number of target platforms, 
+all at the same time! 
+.PP
+We call the machine that is running libunwind
+the \fIhost\fP
+and the machine that is running the process being unwound the 
+\fItarget\fP\&.
+If the host and the target platform are the same, we 
+call it \fInative\fP
+unwinding. If they differ, we call it 
+\fIcross\-platform\fP
+unwinding. 
+.PP
+The principle behind supporting native, cross\-platform, and 
+multi\-platform unwinding is very simple: for native unwinding, a 
+program includes <libunwind.h>
+and uses the linker switch 
+\fB\-l\fPunwind\&.
+For cross\-platform unwinding, a program 
+includes <libunwind\-PLAT\&.h>
+and uses the linker 
+switch \fB\-l\fPunwind\-PLAT,
+where PLAT
+is the name 
+of the target platform (e.g., ia64
+for IA\-64, hppa\-elf
+for ELF\-based HP PA\-RISC, or x86
+for 80386). Multi\-platform 
+unwinding works exactly like cross\-platform unwinding, the only 
+limitation is that a single source file (compilation unit) can include 
+at most one libunwind
+header file. In other words, the 
+platform\-specific support for each supported target needs to be 
+isolated in separate source files\-\-\-a limitation that shouldn\&'t be an 
+issue in practice. 
+.PP
+Note that, by definition, local unwinding is possible only for the 
+native case. Attempting to call, e.g., unw_local_init()
+when 
+targeting a cross\-platform will result in a link\-time error 
+(unresolved references). 
+.PP
+.SH THREAD\- AND SIGNAL\-SAFETY
+
+.PP
+All libunwind
+routines are thread\-safe. What this means is 
+that multiple threads may use libunwind
+simulatenously. 
+However, any given cursor may be accessed by only one thread at 
+any given time. 
+.PP
+To ensure thread\-safety, some libunwind
+routines may have to 
+use locking. Such routines \fImust not\fP
+be called from signal 
+handlers (directly or indirectly) and are therefore \fInot\fP
+signal\-safe. The manual page for each libunwind
+routine 
+identifies whether or not it is signal\-safe, but as a general rule, 
+any routine that may be needed for \fIlocal\fP
+unwinding is 
+signal\-safe (e.g., unw_step()
+for local unwinding is 
+signal\-safe). For remote\-unwinding, \fInone\fP
+of the 
+libunwind
+routines are guaranteed to be signal\-safe. 
+.PP
+.SH UNWINDING THROUGH DYNAMICALLY GENERATED CODE
+
+.PP
+Libunwind
+provides the routines _U_dyn_register()
+and 
+_U_dyn_cancel()
+to register/cancel the information required to 
+unwind through code that has been generated at runtime (e.g., by a 
+just\-in\-time (JIT) compiler). It is important to register the 
+information for \fIall\fP
+dynamically generated code because 
+otherwise, a debugger may not be able to function properly or 
+high\-level language exception handling may not work as expected. 
+.PP
+The interface for registering and canceling dynamic unwind info has 
+been designed for maximum efficiency, so as to minimize the 
+performance impact on JIT\-compilers. In particular, both routines are 
+guaranteed to execute in ``constant time\&'' (O(1)) and the 
+data\-structure encapsulating the dynamic unwind info has been designed 
+to facilitate sharing, such that similar procedures can share much of 
+the underlying information. 
+.PP
+For more information on the libunwind
+support for dynamically 
+generated code, see libunwind\-dynamic(3)\&.
+.PP
+.SH CACHING OF UNWIND INFO
+
+.PP
+To speed up execution, libunwind
+may aggressively cache the 
+information it needs to perform unwinding. If a process changes 
+during its lifetime, this creates a risk of libunwind
+using 
+stale data. For example, this would happen if libunwind
+were 
+to cache information about a shared library which later on gets 
+unloaded (e.g., via \fIdlclose\fP(3)).
+.PP
+To prevent the risk of using stale data, libunwind
+provides two 
+facilities: first, it is possible to flush the cached information 
+associated with a specific address range in the target process (or the 
+entire address space, if desired). This functionality is provided by 
+unw_flush_cache().
+The second facility is provided by 
+unw_set_caching_policy(),
+which lets a program 
+select the exact caching policy in use for a given address\-space 
+object. In particular, by selecting the policy 
+UNW_CACHE_NONE,
+it is possible to turn off caching 
+completely, therefore eliminating the risk of stale data alltogether 
+(at the cost of slower execution). By default, caching is enabled for 
+local unwinding only. The cache size can be dynamically changed with 
+unw_set_cache_size(),
+which also fluches the current cache. 
+.PP
+.SH FILES
+
+.PP
+.TP
+libunwind.h
+ Headerfile to include for native (same 
+platform) unwinding. 
+.TP
+libunwind\-PLAT\&.h
+ Headerfile to include when 
+the unwind target runs on platform PLAT\&.
+For example, to unwind 
+an IA\-64 program, the header file libunwind\-ia64.h
+should be 
+included. 
+.TP
+\fB\-l\fPunwind
+ Linker\-switch to add when building a 
+program that does native (same platform) unwinding. 
+.TP
+\fB\-l\fPunwind\-PLAT
+ Linker\-switch to add when 
+building a program that unwinds a program on platform PLAT\&.
+For example, to (cross\-)unwind an IA\-64 program, the linker switch 
+\-lunwind\-ia64
+should be added. Note: multiple such switches 
+may need to be specified for programs that can unwind programs on 
+multiple platforms. 
+.PP
+.SH SEE ALSO
+
+.PP
+libunwind\-dynamic(3),
+libunwind\-ia64(3),
+libunwind\-ptrace(3),
+libunwind\-setjmp(3),
+unw_create_addr_space(3),
+unw_destroy_addr_space(3),
+unw_flush_cache(3),
+unw_get_accessors(3),
+unw_get_fpreg(3),
+unw_get_proc_info(3),
+unw_get_proc_name(3),
+unw_get_reg(3),
+unw_getcontext(3),
+unw_init_local(3),
+unw_init_remote(3),
+unw_is_fpreg(3),
+unw_is_signal_frame(3),
+unw_regname(3),
+unw_resume(3),
+unw_set_caching_policy(3),
+unw_set_cache_size(3),
+unw_set_fpreg(3),
+unw_set_reg(3),
+unw_step(3),
+unw_strerror(3),
+_U_dyn_register(3),
+_U_dyn_cancel(3)
+.PP
+.SH AUTHOR
+
+.PP
+David Mosberger\-Tang
+.br
+Email: \fBdmosberger@gmail.com\fP
+.br
+WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
+.\" NOTE: This file is generated, DO NOT EDIT.
diff --git a/src/third_party/unwind/dist/doc/libunwind.tex b/src/third_party/unwind/dist/doc/libunwind.tex
new file mode 100644
index 00000000000..6cbb4766336
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/libunwind.tex
@@ -0,0 +1,359 @@
+\documentclass{article}
+\usepackage[fancyhdr,pdf]{latex2man}
+
+\input{common.tex}
+
+\begin{document}
+
+\begin{Name}{3}{libunwind}{David Mosberger-Tang}{Programming Library}{Introduction to libunwind}libunwind -- a (mostly) platform-independent unwind API
+\end{Name}
+
+\section{Synopsis}
+
+\File{\#include $<$libunwind.h$>$}\\
+
+\noindent
+\Type{int} \Func{unw\_getcontext}(\Type{unw\_context\_t~*});\\
+\noindent
+\Type{int} \Func{unw\_init\_local}(\Type{unw\_cursor\_t~*}, \Type{unw\_context\_t~*});\\
+\noindent
+\Type{int} \Func{unw\_init\_remote}(\Type{unw\_cursor\_t~*}, \Type{unw\_addr\_space\_t}, \Type{void~*});\\
+\noindent
+\Type{int} \Func{unw\_step}(\Type{unw\_cursor\_t~*});\\
+\noindent
+\Type{int} \Func{unw\_get\_reg}(\Type{unw\_cursor\_t~*}, \Type{unw\_regnum\_t}, \Type{unw\_word\_t~*});\\
+\noindent
+\Type{int} \Func{unw\_get\_fpreg}(\Type{unw\_cursor\_t~*}, \Type{unw\_regnum\_t}, \Type{unw\_fpreg\_t~*});\\
+\noindent
+\Type{int} \Func{unw\_set\_reg}(\Type{unw\_cursor\_t~*}, \Type{unw\_regnum\_t}, \Type{unw\_word\_t});\\
+\noindent
+\Type{int} \Func{unw\_set\_fpreg}(\Type{unw\_cursor\_t~*}, \Type{unw\_regnum\_t}, \Type{unw\_fpreg\_t});\\
+\noindent
+\Type{int} \Func{unw\_resume}(\Type{unw\_cursor\_t~*});\\
+
+\noindent
+\Type{unw\_addr\_space\_t} \Var{unw\_local\_addr\_space};\\
+\noindent
+\Type{unw\_addr\_space\_t} \Func{unw\_create\_addr\_space}(\Type{unw\_accessors\_t}, \Type{int});\\
+\noindent
+\Type{void} \Func{unw\_destroy\_addr\_space}(\Type{unw\_addr\_space\_t});\\
+\noindent
+\Type{unw\_accessors\_t} \Func{unw\_get\_accessors}(\Type{unw\_addr\_space\_t});\\
+\noindent
+\Type{void} \Func{unw\_flush\_cache}(\Type{unw\_addr\_space\_t}, \Type{unw\_word\_t}, \Type{unw\_word\_t});\\
+\noindent
+\Type{int} \Func{unw\_set\_caching\_policy}(\Type{unw\_addr\_space\_t}, \Type{unw\_caching\_policy\_t});\\
+\noindent
+\Type{int} \Func{unw\_set\_cache\_size}(\Type{unw\_addr\_space\_t}, \Type{size\_t}, \Type{int});\\
+
+\noindent
+\Type{const char *}\Func{unw\_regname}(\Type{unw\_regnum\_t});\\
+\noindent
+\Type{int} \Func{unw\_get\_proc\_info}(\Type{unw\_cursor\_t~*}, \Type{unw\_proc\_info\_t~*});\\
+\noindent
+\Type{int} \Func{unw\_get\_save\_loc}(\Type{unw\_cursor\_t~*}, \Type{int}, \Type{unw\_save\_loc\_t~*});\\
+\noindent
+\Type{int} \Func{unw\_is\_fpreg}(\Type{unw\_regnum\_t});\\
+\Type{int} \Func{unw\_is\_signal\_frame}(\Type{unw\_cursor\_t~*});\\
+\noindent
+\Type{int} \Func{unw\_get\_proc\_name}(\Type{unw\_cursor\_t~*}, \Type{char~*}, \Type{size\_t}, \Type{unw\_word\_t~*});\\
+
+\noindent
+\Type{void} \Func{\_U\_dyn\_register}(\Type{unw\_dyn\_info\_t~*});\\
+\noindent
+\Type{void} \Func{\_U\_dyn\_cancel}(\Type{unw\_dyn\_info\_t~*});\\
+
+\section{Local Unwinding}
+
+\Prog{Libunwind} is very easy to use when unwinding a stack from
+within a running program.  This is called \emph{local} unwinding.  Say
+you want to unwind the stack while executing in some function
+\Func{F}().  In this function, you would call \Func{unw\_getcontext}()
+to get a snapshot of the CPU registers (machine-state).  Then you
+initialize an \emph{unwind~cursor} based on this snapshot.  This is
+done with a call to \Func{unw\_init\_local}().  The cursor now points
+to the current frame, that is, the stack frame that corresponds to the
+current activation of function \Func{F}().  The unwind cursor can then
+be moved ``up'' (towards earlier stack frames) by calling
+\Func{unw\_step}().  By repeatedly calling this routine, you can
+uncover the entire call-chain that led to the activation of function
+\Func{F}().  A positive return value from \Func{unw\_step}() indicates
+that there are more frames in the chain, zero indicates that the end
+of the chain has been reached, and any negative value indicates that
+some sort of error has occurred.
+
+While it is not possible to directly move the unwind cursor in the
+``down'' direction (towards newer stack frames), this effect can be
+achieved by making copies of an unwind cursor.  For example, a program
+that sometimes has to move ``down'' by one stack frame could maintain
+two cursor variables: ``\Var{curr}'' and ``\Var{prev}''.  The former
+would be used as the current cursor and \Var{prev} would be maintained
+as the ``previous frame'' cursor by copying the contents of \Var{curr}
+to \Var{prev} right before calling \Func{unw\_step}().  With this
+approach, the program could move one step ``down'' simply by copying
+back \Var{prev} to \Var{curr} whenever that is necessary.  In the most
+extreme case, a program could maintain a separate cursor for each call
+frame and that way it could move up and down the callframe-chain at
+will.
+
+Given an unwind cursor, it is possible to read and write the CPU
+registers that were preserved for the current stack frame (as
+identified by the cursor).  \Prog{Libunwind} provides several routines
+for this purpose: \Func{unw\_get\_reg}() reads an integer (general)
+register, \Func{unw\_get\_fpreg}() reads a floating-point register,
+\Func{unw\_set\_reg}() writes an integer register, and
+\Func{unw\_set\_fpreg}() writes a floating-point register.  Note that,
+by definition, only the \emph{preserved} machine state can be accessed
+during an unwind operation.  Normally, this state consists of the
+\emph{callee-saved} (``preserved'') registers.  However, in some
+special circumstances (e.g., in a signal handler trampoline), even the
+\emph{caller-saved} (``scratch'') registers are preserved in the stack
+frame and, in those cases, \Prog{libunwind} will grant access to them
+as well.  The exact set of registers that can be accessed via the
+cursor depends, of course, on the platform.  However, there are two
+registers that can be read on all platforms: the instruction pointer
+(IP), sometimes also known as the ``program counter'', and the stack
+pointer (SP).  In \Prog{libunwind}, these registers are identified by
+the macros \Const{UNW\_REG\_IP} and \Const{UNW\_REG\_SP},
+respectively.
+
+Besides just moving the unwind cursor and reading/writing saved
+registers, \Prog{libunwind} also provides the ability to resume
+execution at an arbitrary stack frame.  As you might guess, this is
+useful for implementing non-local gotos and the exception handling
+needed by some high-level languages such as Java.  Resuming execution
+with a particular stack frame simply requires calling
+\Func{unw\_resume}() and passing the cursor identifying the target
+frame as the only argument.
+
+Normally, \Prog{libunwind} supports both local and remote unwinding
+(the latter will be explained in the next section).  However, if you
+tell libunwind that your program only needs local unwinding, then a
+special implementation can be selected which may run much faster than
+the generic implementation which supports both kinds of unwinding.  To
+select this optimized version, simply define the macro
+\Const{UNW\_LOCAL\_ONLY} before including the headerfile
+\File{$<$libunwind.h$>$}.  It is perfectly OK for a single program to
+employ both local-only and generic unwinding.  That is, whether or not
+\Const{UNW\_LOCAL\_ONLY} is defined is a choice that each source-file
+(compilation-unit) can make on its own.  Independent of the setting(s)
+of \Const{UNW\_LOCAL\_ONLY}, you'll always link the same library into
+the program (normally \Opt{-l}\File{unwind}).  Furthermore, the
+portion of \Prog{libunwind} that manages unwind-info for dynamically
+generated code is not affected by the setting of
+\Const{UNW\_LOCAL\_ONLY}.
+
+If we put all of the above together, here is how we could use
+\Prog{libunwind} to write a function ``\Func{show\_backtrace}()''
+which prints a classic stack trace:
+
+\begin{verbatim}
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+
+void show_backtrace (void) {
+  unw_cursor_t cursor; unw_context_t uc;
+  unw_word_t ip, sp;
+
+  unw_getcontext(&uc);
+  unw_init_local(&cursor, &uc);
+  while (unw_step(&cursor) > 0) {
+    unw_get_reg(&cursor, UNW_REG_IP, &ip);
+    unw_get_reg(&cursor, UNW_REG_SP, &sp);
+    printf ("ip = %lx, sp = %lx\n", (long) ip, (long) sp);
+  }
+}
+\end{verbatim}
+
+
+\section{Remote Unwinding}
+
+\Prog{Libunwind} can also be used to unwind a stack in a ``remote''
+process.  Here, ``remote'' may mean another process on the same
+machine or even a process on a completely different machine from the
+one that is running \Prog{libunwind}.  Remote unwinding is typically
+used by debuggers and instruction-set simulators, for example.
+
+Before you can unwind a remote process, you need to create a new
+address-space object for that process.  This is achieved with the
+\Func{unw\_create\_addr\_space}() routine.  The routine takes two
+arguments: a pointer to a set of \emph{accessor} routines and an
+integer that specifies the byte-order of the target process.  The
+accessor routines provide \Func{libunwind} with the means to
+communicate with the remote process.  In particular, there are
+callbacks to read and write the process's memory, its registers, and
+to access unwind information which may be needed by \Func{libunwind}.
+
+With the address space created, unwinding can be initiated by a call
+to \Func{unw\_init\_remote}().  This routine is very similar to
+\Func{unw\_init\_local}(), except that it takes an address-space
+object and an opaque pointer as arguments.  The routine uses these
+arguments to fetch the initial machine state.  \Prog{Libunwind} never
+uses the opaque pointer on its own, but instead just passes it on to
+the accessor (callback) routines.  Typically, this pointer is used to
+select, e.g., the thread within a process that is to be unwound.
+
+Once a cursor has been initialized with \Func{unw\_init\_remote}(),
+unwinding works exactly like in the local case.  That is, you can use
+\Func{unw\_step}() to move ``up'' in the call-chain, read and write
+registers, or resume execution at a particular stack frame by calling
+\Func{unw\_resume}.
+
+
+\section{Cross-platform and Multi-platform Unwinding}
+
+\Prog{Libunwind} has been designed to enable unwinding across
+platforms (architectures).  Indeed, a single program can use
+\Prog{libunwind} to unwind an arbitrary number of target platforms,
+all at the same time!
+
+We call the machine that is running \Prog{libunwind} the \emph{host}
+and the machine that is running the process being unwound the
+\emph{target}.  If the host and the target platform are the same, we
+call it \emph{native} unwinding.  If they differ, we call it
+\emph{cross-platform} unwinding.
+
+The principle behind supporting native, cross-platform, and
+multi-platform unwinding is very simple: for native unwinding, a
+program includes \File{$<$libunwind.h$>$} and uses the linker switch
+\Opt{-l}\File{unwind}.  For cross-platform unwinding, a program
+includes \File{$<$libunwind-}\Var{PLAT}\File{.h$>$} and uses the linker
+switch \Opt{-l}\File{unwind-}\Var{PLAT}, where \Var{PLAT} is the name
+of the target platform (e.g., \File{ia64} for IA-64, \File{hppa-elf}
+for ELF-based HP PA-RISC, or \File{x86} for 80386).  Multi-platform
+unwinding works exactly like cross-platform unwinding, the only
+limitation is that a single source file (compilation unit) can include
+at most one \Prog{libunwind} header file.  In other words, the
+platform-specific support for each supported target needs to be
+isolated in separate source files---a limitation that shouldn't be an
+issue in practice.
+
+Note that, by definition, local unwinding is possible only for the
+native case.  Attempting to call, e.g., \Func{unw\_local\_init}() when
+targeting a cross-platform will result in a link-time error
+(unresolved references).
+
+
+\section{Thread- and Signal-Safety}
+
+
+All \Prog{libunwind} routines are thread-safe.  What this means is
+that multiple threads may use \Prog{libunwind} simulatenously.
+However, any given cursor may be accessed by only one thread at
+any given time.
+
+To ensure thread-safety, some \Prog{libunwind} routines may have to
+use locking.  Such routines \emph{must~not} be called from signal
+handlers (directly or indirectly) and are therefore \emph{not}
+signal-safe.  The manual page for each \Prog{libunwind} routine
+identifies whether or not it is signal-safe, but as a general rule,
+any routine that may be needed for \emph{local} unwinding is
+signal-safe (e.g., \Func{unw\_step}() for local unwinding is
+signal-safe).  For remote-unwinding, \emph{none} of the
+\Prog{libunwind} routines are guaranteed to be signal-safe.
+
+
+\section{Unwinding Through Dynamically Generated Code}
+
+\Func{Libunwind} provides the routines \Func{\_U\_dyn\_register}() and
+\Func{\_U\_dyn\_cancel}() to register/cancel the information required to
+unwind through code that has been generated at runtime (e.g., by a
+just-in-time (JIT) compiler).  It is important to register the
+information for \emph{all} dynamically generated code because
+otherwise, a debugger may not be able to function properly or
+high-level language exception handling may not work as expected.
+
+The interface for registering and canceling dynamic unwind info has
+been designed for maximum efficiency, so as to minimize the
+performance impact on JIT-compilers.  In particular, both routines are
+guaranteed to execute in ``constant time'' (O(1)) and the
+data-structure encapsulating the dynamic unwind info has been designed
+to facilitate sharing, such that similar procedures can share much of
+the underlying information.
+
+For more information on the \Prog{libunwind} support for dynamically
+generated code, see \SeeAlso{libunwind-dynamic(3)}.
+
+
+\section{Caching of Unwind Info}
+
+To speed up execution, \Prog{libunwind} may aggressively cache the
+information it needs to perform unwinding.  If a process changes
+during its lifetime, this creates a risk of \Prog{libunwind} using
+stale data.  For example, this would happen if \Prog{libunwind} were
+to cache information about a shared library which later on gets
+unloaded (e.g., via \Cmd{dlclose}{3}).
+
+To prevent the risk of using stale data, \Prog{libunwind} provides two
+facilities: first, it is possible to flush the cached information
+associated with a specific address range in the target process (or the
+entire address space, if desired).  This functionality is provided by
+\Func{unw\_flush\_cache}().  The second facility is provided by
+\Func{unw\_set\_caching\_policy}(), which lets a program
+select the exact caching policy in use for a given address-space
+object.  In particular, by selecting the policy
+\Const{UNW\_CACHE\_NONE}, it is possible to turn off caching
+completely, therefore eliminating the risk of stale data alltogether
+(at the cost of slower execution).  By default, caching is enabled for
+local unwinding only.  The cache size can be dynamically changed with
+\Func{unw\_set\_cache\_size}(), which also fluches the current cache.
+
+
+\section{Files}
+
+\begin{Description}
+\item[\File{libunwind.h}] Headerfile to include for native (same
+  platform) unwinding.
+\item[\File{libunwind-}\Var{PLAT}\File{.h}] Headerfile to include when
+  the unwind target runs on platform \Var{PLAT}.  For example, to unwind
+  an IA-64 program, the header file \File{libunwind-ia64.h} should be
+  included.
+\item[\Opt{-l}\File{unwind}] Linker-switch to add when building a
+  program that does native (same platform) unwinding.
+\item[\Opt{-l}\File{unwind-}\Var{PLAT}] Linker-switch to add when
+  building a program that unwinds a program on platform \Var{PLAT}.
+  For example, to (cross-)unwind an IA-64 program, the linker switch
+  \File{-lunwind-ia64} should be added.  Note: multiple such switches
+  may need to be specified for programs that can unwind programs on
+  multiple platforms.
+\end{Description}
+
+\section{See Also}
+
+\SeeAlso{libunwind-dynamic(3)},
+\SeeAlso{libunwind-ia64(3)},
+\SeeAlso{libunwind-ptrace(3)},
+\SeeAlso{libunwind-setjmp(3)},
+\SeeAlso{unw\_create\_addr\_space(3)},
+\SeeAlso{unw\_destroy\_addr\_space(3)},
+\SeeAlso{unw\_flush\_cache(3)},
+\SeeAlso{unw\_get\_accessors(3)},
+\SeeAlso{unw\_get\_fpreg(3)},
+\SeeAlso{unw\_get\_proc\_info(3)},
+\SeeAlso{unw\_get\_proc\_name(3)},
+\SeeAlso{unw\_get\_reg(3)},
+\SeeAlso{unw\_getcontext(3)},
+\SeeAlso{unw\_init\_local(3)},
+\SeeAlso{unw\_init\_remote(3)},
+\SeeAlso{unw\_is\_fpreg(3)},
+\SeeAlso{unw\_is\_signal\_frame(3)},
+\SeeAlso{unw\_regname(3)},
+\SeeAlso{unw\_resume(3)},
+\SeeAlso{unw\_set\_caching\_policy(3)},
+\SeeAlso{unw\_set\_cache\_size(3)},
+\SeeAlso{unw\_set\_fpreg(3)},
+\SeeAlso{unw\_set\_reg(3)},
+\SeeAlso{unw\_step(3)},
+\SeeAlso{unw\_strerror(3)},
+\SeeAlso{\_U\_dyn\_register(3)},
+\SeeAlso{\_U\_dyn\_cancel(3)}
+
+\section{Author}
+
+\noindent
+David Mosberger-Tang\\
+Email: \Email{dmosberger@gmail.com}\\
+WWW: \URL{http://www.nongnu.org/libunwind/}.
+\LatexManEnd
+
+\end{document}
diff --git a/src/third_party/unwind/dist/doc/libunwind.trans b/src/third_party/unwind/dist/doc/libunwind.trans
new file mode 100644
index 00000000000..a514e5a081d
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/libunwind.trans
@@ -0,0 +1,34 @@
+$manMacro1a{'Type'}		= $manMacro1a{File};
+	$manMacro1b{'Type'}	= $manMacro1b{File};
+$htmlMacro1a{'Type'}		= $htmlMacro1a{File};
+	$htmlMacro1b{'Type'}	= $htmlMacro1b{File};
+$texiMacro1a{'Type'}		= $texiMacro1a{File};
+	$texiMacro1b{'Type'}	= $texiMacro1b{File};
+$manMacro1a{'Func'}		= $manMacro1a{Prog};
+	$manMacro1b{'Func'}	= $manMacro1b{Prog};
+$htmlMacro1a{'Func'}		= $htmlMacro1a{Arg};
+	$htmlMacro1b{'Func'}	= $htmlMacro1b{Arg};
+$texiMacro1a{'Func'}		= $texiMacro1a{Prog};
+	$texiMacro1b{'Func'}	= $texiMacro1b{Prog};
+$manMacro1a{'Var'}		= $manMacro1a{Prog};
+	$manMacro1b{'Var'}	= $manMacro1b{Prog};
+$htmlMacro1a{'Var'}		= $htmlMacro1a{Prog};
+	$htmlMacro1b{'Var'}	= $htmlMacro1b{Prog};
+$texiMacro1a{'Var'}		= $texiMacro1a{Prog};
+	$texiMacro1b{'Var'}	= $texiMacro1b{Prog};
+$manMacro1a{'Const'}		= $manMacro1a{File};
+	$manMacro1b{'Const'}	= $manMacro1b{File};
+$htmlMacro1a{'Const'}		= $htmlMacro1a{File};
+	$htmlMacro1b{'Const'}	= $htmlMacro1b{File};
+$texiMacro1a{'Const'}		= $texiMacro1a{File};
+	$texiMacro1b{'Const'}	= $texiMacro1b{File};
+
+$manMacro1a{'SeeAlso'}		= $manMacro1a{File};
+	$manMacro1b{'SeeAlso'}	= $manMacro1b{File};
+# special handling of SeeAlso in latex2man, so that argument gets doubled:
+$htmlMacro2a{'SeeAlso'}		= "<a href=\"";
+	$htmlMacro2b{'SeeAlso'}	= ".html\">$htmlMacro1a{File}";
+	$htmlMacro2c{'SeeAlso'}	= "$htmlMacro1b{File}</a>";
+$texiMacro1a{'SeeAlso'}		= $texiMacro1a{File};
+	$texiMacro1b{'SeeAlso'}	= $texiMacro1b{File};
+
diff --git a/src/third_party/unwind/dist/doc/unw_apply_reg_state.man b/src/third_party/unwind/dist/doc/unw_apply_reg_state.man
new file mode 100644
index 00000000000..457f0c4dd17
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_apply_reg_state.man
@@ -0,0 +1,90 @@
+'\" t
+.\" Manual page created with latex2man on Wed Aug 16 11:09:44 PDT 2017
+.\" NOTE: This file is generated, DO NOT EDIT.
+.de Vb
+.ft CW
+.nf
+..
+.de Ve
+.ft R
+
+.fi
+..
+.TH "UNW\\_APPLY\\_REG\\_STATE" "3" "16 August 2017" "Programming Library " "Programming Library "
+.SH NAME
+unw_apply_reg_state
+\-\- apply a register state update to a cursor 
+.PP
+.SH SYNOPSIS
+
+.PP
+#include <libunwind.h>
+.br
+.PP
+int
+unw_apply_reg_state(unw_cursor_t *cp,
+void *reg_states_data);
+.br
+.PP
+.SH DESCRIPTION
+
+.PP
+The unw_apply_reg_state()
+routine updates the register values 
+of a cursor according to the instructions in reg_states_data,
+which have been obtained by calling unw_reg_states_iterate\&.
+.PP
+.SH RETURN VALUE
+
+.PP
+On successful completion, unw_apply_reg_state()
+returns 0. 
+Otherwise the negative value of one of the error\-codes below is 
+returned. 
+.PP
+.SH THREAD AND SIGNAL SAFETY
+
+.PP
+unw_apply_reg_state()
+is thread\-safe. If cursor cp
+is 
+in the local address\-space, this routine is also safe to use from a 
+signal handler. 
+.PP
+.SH ERRORS
+
+.PP
+.TP
+UNW_EUNSPEC
+ An unspecified error occurred. 
+.TP
+UNW_ENOINFO
+ Libunwind
+was unable to locate 
+unwind\-info for the procedure. 
+.TP
+UNW_EBADVERSION
+ The unwind\-info for the procedure has 
+version or format that is not understood by libunwind\&.
+.PP
+In addition, unw_apply_reg_state()
+may return any error 
+returned by the access_mem()
+call\-back (see 
+unw_create_addr_space(3)).
+.PP
+.SH SEE ALSO
+
+.PP
+libunwind(3),
+unw_reg_states_iterate(3)
+.PP
+.SH AUTHOR
+
+.PP
+David Mosberger\-Tang
+.br
+Email: \fBdmosberger@gmail.com\fP
+.br
+WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
+.\" NOTE: This file is generated, DO NOT EDIT.
diff --git a/src/third_party/unwind/dist/doc/unw_apply_reg_state.tex b/src/third_party/unwind/dist/doc/unw_apply_reg_state.tex
new file mode 100644
index 00000000000..c67cc3ebfaf
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_apply_reg_state.tex
@@ -0,0 +1,63 @@
+\documentclass{article}
+\usepackage[fancyhdr,pdf]{latex2man}
+
+\input{common.tex}
+
+\begin{document}
+
+\begin{Name}{3}{unw\_apply\_reg\_state}{David Mosberger-Tang}{Programming Library}{unw\_apply\_reg\_state}unw\_apply\_reg\_state -- apply a register state update to a cursor
+\end{Name}
+
+\section{Synopsis}
+
+\File{\#include $<$libunwind.h$>$}\\
+
+\Type{int}
+\Func{unw\_apply\_reg\_state}(\Type{unw\_cursor\_t~*}\Var{cp},
+\Type{void~*}\Var{reg\_states\_data});\\
+
+\section{Description}
+
+The \Func{unw\_apply\_reg\_state}() routine updates the register values
+of a cursor according to the instructions in \Var{reg\_states\_data},
+which have been obtained by calling \Var{unw\_reg\_states\_iterate}.
+
+\section{Return Value}
+
+On successful completion, \Func{unw\_apply\_reg\_state}() returns 0.
+Otherwise the negative value of one of the error-codes below is
+returned.
+
+\section{Thread and Signal Safety}
+
+\Func{unw\_apply\_reg\_state}() is thread-safe.  If cursor \Var{cp} is
+in the local address-space, this routine is also safe to use from a
+signal handler.
+
+\section{Errors}
+
+\begin{Description}
+\item[\Const{UNW\_EUNSPEC}] An unspecified error occurred.
+\item[\Const{UNW\_ENOINFO}] \Prog{Libunwind} was unable to locate
+  unwind-info for the procedure.
+\item[\Const{UNW\_EBADVERSION}] The unwind-info for the procedure has
+  version or format that is not understood by \Prog{libunwind}.
+\end{Description}
+In addition, \Func{unw\_apply\_reg\_state}() may return any error
+returned by the \Func{access\_mem}() call-back (see
+\Func{unw\_create\_addr\_space}(3)).
+
+\section{See Also}
+
+\SeeAlso{libunwind(3)},
+\SeeAlso{unw\_reg\_states\_iterate(3)}
+
+\section{Author}
+
+\noindent
+David Mosberger-Tang\\
+Email: \Email{dmosberger@gmail.com}\\
+WWW: \URL{http://www.nongnu.org/libunwind/}.
+\LatexManEnd
+
+\end{document}
diff --git a/src/third_party/unwind/dist/doc/unw_backtrace.man b/src/third_party/unwind/dist/doc/unw_backtrace.man
new file mode 100644
index 00000000000..5699bbfe288
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_backtrace.man
@@ -0,0 +1,86 @@
+'\" t
+.\" Manual page created with latex2man on Fri Aug 31 13:39:04 EEST 2012
+.\" NOTE: This file is generated, DO NOT EDIT.
+.de Vb
+.ft CW
+.nf
+..
+.de Ve
+.ft R
+
+.fi
+..
+.TH "UNW\\_BACKTRACE" "3" "31 August 2012" "Programming Library " "Programming Library "
+.SH NAME
+unw_backtrace
+\-\- return backtrace for the calling program 
+.PP
+.SH SYNOPSIS
+
+.PP
+#include <libunwind.h>
+.br
+.PP
+int
+unw_backtrace(void **buffer,
+int size);
+.br
+.PP
+#include <execinfo.h>
+.br
+.PP
+int
+backtrace(void **buffer,
+int size);
+.br
+.PP
+.SH DESCRIPTION
+
+.PP
+unw_backtrace()
+is a convenient routine for obtaining the backtrace for 
+the calling program. The routine fills up to size
+addresses in the array 
+pointed by buffer\&.
+The routine is only available for local unwinding. 
+.PP
+Note that many (but not all) systems provide practically identical function 
+called backtrace().
+The prototype for this function is usually obtained 
+by including the <execinfo.h>
+header file \-\- a prototype for 
+backtrace()
+is not provided by libunwind\&.
+libunwind
+weakly 
+aliases backtrace()
+to unw_backtrace(),
+so when a program 
+calling backtrace()
+is linked against libunwind,
+it may end up 
+calling unw_backtrace().
+.PP
+.SH RETURN VALUE
+
+.PP
+The routine returns the number of addresses stored in the array pointed by 
+buffer\&.
+The return value may be zero to indicate that no addresses were 
+stored. 
+.PP
+.SH SEE ALSO
+
+.PP
+libunwind(3),
+unw_step(3)
+.PP
+.SH AUTHOR
+
+.PP
+David Mosberger\-Tang
+.br
+Email: \fBdmosberger@gmail.com\fP
+.br
+WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
+.\" NOTE: This file is generated, DO NOT EDIT.
diff --git a/src/third_party/unwind/dist/doc/unw_backtrace.tex b/src/third_party/unwind/dist/doc/unw_backtrace.tex
new file mode 100644
index 00000000000..c383eeb37a1
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_backtrace.tex
@@ -0,0 +1,54 @@
+\documentclass{article}
+\usepackage[fancyhdr,pdf]{latex2man}
+
+\input{common.tex}
+
+\begin{document}
+
+\begin{Name}{3}{unw\_backtrace}{David Mosberger-Tang}{Programming Library}{unw\_backtrace}unw\_backtrace -- return backtrace for the calling program
+\end{Name}
+
+\section{Synopsis}
+
+\File{\#include $<$libunwind.h$>$}\\
+
+\Type{int} \Func{unw\_backtrace}(\Type{void~**}\Var{buffer}, \Type{int}~\Var{size});\\
+
+\File{\#include $<$execinfo.h$>$}\\
+
+\Type{int} \Func{backtrace}(\Type{void~**}\Var{buffer}, \Type{int}~\Var{size});\\
+
+\section{Description}
+
+\Func{unw\_backtrace}() is a convenient routine for obtaining the backtrace for
+the calling program. The routine fills up to \Var{size} addresses in the array
+pointed by \Var{buffer}. The routine is only available for local unwinding.
+
+Note that many (but not all) systems provide practically identical function
+called \Func{backtrace}(). The prototype for this function is usually obtained
+by including the \File{$<$execinfo.h$>$} header file -- a prototype for
+\Func{backtrace}() is not provided by \Prog{libunwind}. \Prog{libunwind} weakly
+aliases \Func{backtrace}() to \Func{unw\_backtrace}(), so when a program
+calling \Func{backtrace}() is linked against \Prog{libunwind}, it may end up
+calling \Func{unw\_backtrace}().
+
+\section{Return Value}
+
+The routine returns the number of addresses stored in the array pointed by
+\Var{buffer}. The return value may be zero to indicate that no addresses were
+stored.
+
+\section{See Also}
+
+\SeeAlso{libunwind(3)},
+\SeeAlso{unw\_step(3)}
+
+\section{Author}
+
+\noindent
+David Mosberger-Tang\\
+Email: \Email{dmosberger@gmail.com}\\
+WWW: \URL{http://www.nongnu.org/libunwind/}.
+\LatexManEnd
+
+\end{document}
diff --git a/src/third_party/unwind/dist/doc/unw_create_addr_space.man b/src/third_party/unwind/dist/doc/unw_create_addr_space.man
new file mode 100644
index 00000000000..4aca13ecd82
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_create_addr_space.man
@@ -0,0 +1,457 @@
+'\" t
+.\" Manual page created with latex2man on Thu Aug 16 09:44:45 MDT 2007
+.\" NOTE: This file is generated, DO NOT EDIT.
+.de Vb
+.ft CW
+.nf
+..
+.de Ve
+.ft R
+
+.fi
+..
+.TH "UNW\\_CREATE\\_ADDR\\_SPACE" "3" "16 August 2007" "Programming Library " "Programming Library "
+.SH NAME
+unw_create_addr_space
+\-\- create address space for remote unwinding 
+.PP
+.SH SYNOPSIS
+
+.PP
+#include <libunwind.h>
+.br
+.PP
+unw_addr_space_t
+unw_create_addr_space(unw_accessors_t *ap,
+int
+byteorder);
+.br
+.PP
+.SH DESCRIPTION
+
+.PP
+The unw_create_addr_space()
+routine creates a new unwind 
+address\-space and initializes it based on the call\-back routines 
+passed via the ap
+pointer and the specified byteorder\&.
+The call\-back routines are described in detail below. The 
+byteorder
+can be set to 0 to request the default byte\-order of 
+the unwind target. To request a particular byte\-order, 
+byteorder
+can be set to any constant defined by 
+<endian.h>\&.
+In particular, __LITTLE_ENDIAN
+would 
+request little\-endian byte\-order and __BIG_ENDIAN
+would 
+request big\-endian byte\-order. Whether or not a particular byte\-order 
+is supported depends on the target platform. 
+.PP
+.SH CALL\-BACK ROUTINES
+
+.PP
+Libunwind
+uses a set of call\-back routines to access the 
+information it needs to unwind a chain of stack\-frames. These 
+routines are specified via the ap
+argument, which points to a 
+variable of type unw_accessors_t\&.
+The contents of this 
+variable is copied into the newly\-created address space, so the 
+variable must remain valid only for the duration of the call to 
+unw_create_addr_space().
+.PP
+The first argument to every call\-back routine is an address\-space 
+identifier (as)
+and the last argument is an arbitrary, 
+application\-specified void\-pointer (arg).
+When invoking a 
+call\-back routine, libunwind
+sets the as
+argument to the 
+address\-space on whose behalf the invocation is made and the arg
+argument to the value that was specified when 
+unw_init_remote(3)
+was called. 
+.PP
+The synopsis and a detailed description of every call\-back routine 
+follows below. 
+.PP
+.SS CALL\-BACK ROUTINE SYNOPSIS
+.PP
+int
+find_proc_info(unw_addr_space_t
+as,
+.br
+\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fPunw_word_t
+ip,
+unw_proc_info_t *pip,
+.br
+\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fPint
+need_unwind_info,
+void *arg);
+.br
+void
+put_unwind_info(unw_addr_space_t
+as,
+.br
+\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fPunw_proc_info_t *pip,
+void *arg);
+.br
+int
+get_dyn_info_list_addr(unw_addr_space_t
+as,
+.br
+\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fPunw_word_t *dilap,
+void *arg);
+.br
+int
+access_mem(unw_addr_space_t
+as,
+.br
+\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fPunw_word_t
+addr,
+unw_word_t *valp,
+.br
+\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fPint
+write,
+void *arg);
+.br
+int
+access_reg(unw_addr_space_t
+as,
+.br
+\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fPunw_regnum_t
+regnum,
+unw_word_t *valp,
+.br
+\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fPint
+write,
+void *arg);
+.br
+int
+access_fpreg(unw_addr_space_t
+as,
+.br
+\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fPunw_regnum_t
+regnum,
+unw_fpreg_t *fpvalp,
+.br
+\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fPint
+write,
+void *arg);
+.br
+int
+resume(unw_addr_space_t
+as,
+.br
+\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fPunw_cursor_t *cp,
+void *arg);
+.br
+int
+get_proc_name(unw_addr_space_t
+as,
+.br
+\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fPunw_word_t
+addr,
+char *bufp,
+.br
+\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fPsize_t
+buf_len,
+unw_word_t *offp,
+.br
+\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fP\fB \fPvoid *arg);
+.br
+.PP
+.SS FIND_PROC_INFO
+.PP
+Libunwind
+invokes the find_proc_info()
+call\-back to 
+locate the information need to unwind a particular procedure. The 
+ip
+argument is an instruction\-address inside the procedure whose 
+information is needed. The pip
+argument is a pointer to the 
+variable used to return the desired information. The type of this 
+variable is unw_proc_info_t\&.
+See 
+unw_get_proc_info(3)
+for details. Argument 
+need_unwind_info
+is zero if the call\-back does not need to 
+provide values for the following members in the 
+unw_proc_info_t
+structure: format,
+unwind_info_size,
+and unwind_info\&.
+If 
+need_unwind_info
+is non\-zero, valid values need to be returned 
+in these members. Furthermore, the contents of the memory addressed 
+by the unwind_info
+member must remain valid until the info is 
+released via the put_unwind_info
+call\-back (see below). 
+.PP
+On successful completion, the find_proc_info()
+call\-back must 
+return zero. Otherwise, the negative value of one of the 
+unw_error_t
+error\-codes may be returned. In particular, this 
+call\-back may return \-UNW_ESTOPUNWIND
+to signal the end of 
+the frame\-chain. 
+.PP
+.SS PUT_UNWIND_INFO
+.PP
+Libunwind
+invokes the put_unwind_info()
+call\-back to 
+release the resources (such as memory) allocated by a previous call to 
+find_proc_info()
+with the need_unwind_info
+argument 
+set to a non\-zero value. The pip
+argument has the same value as 
+the argument of the same name in the previous matching call to 
+find_proc_info().
+Note that libunwind
+does \fInot\fP
+invoke put_unwind_info
+for calls to find_proc_info()
+with a zero need_unwind_info
+argument. 
+.PP
+.SS GET_DYN_INFO_LIST_ADDR
+.PP
+Libunwind
+invokes the get_dyn_info_list_addr()
+call\-back to obtain the address of the head of the dynamic unwind\-info 
+registration list. The variable stored at the returned address must 
+have a type of unw_dyn_info_list_t
+(see 
+_U_dyn_register(3)).
+The dliap
+argument is a pointer 
+to a variable of type unw_word_t
+which is used to return the 
+address of the dynamic unwind\-info registration list. If no dynamic 
+unwind\-info registration list exist, the value pointed to by 
+dliap
+must be cleared to zero. Libunwind
+will cache the 
+value returned by get_dyn_info_list_addr()
+if caching is 
+enabled for the given address\-space. The cache can be cleared with a 
+call to unw_flush_cache().
+.PP
+On successful completion, the get_dyn_info_list_addr()
+call\-back must return zero. Otherwise, the negative value of one of 
+the unw_error_t
+error\-codes may be returned. 
+.PP
+.SS ACCESS_MEM
+.PP
+Libunwind
+invokes the access_mem()
+call\-back to read 
+from or write to a word of memory in the target address\-space. The 
+address of the word to be accessed is passed in argument addr\&.
+To read memory, libunwind
+sets argument write
+to zero and 
+valp
+to point to the word that receives the read value. To 
+write memory, libunwind
+sets argument write
+to a non\-zero 
+value and valp
+to point to the word that contains the value to 
+be written. The word that valp
+points to is always in the 
+byte\-order of the host\-platform, regardless of the byte\-order of the 
+target. In other words, it is the responsibility of the call\-back 
+routine to convert between the target\&'s and the host\&'s byte\-order, if 
+necessary. 
+.PP
+On successful completion, the access_mem()
+call\-back must return zero. Otherwise, the negative value of one of 
+the unw_error_t
+error\-codes may be returned. 
+.PP
+.SS ACCESS_REG
+.PP
+Libunwind
+invokes the access_reg()
+call\-back to read 
+from or write to a scalar (non\-floating\-point) CPU register. The 
+index of the register to be accessed is passed in argument 
+regnum\&.
+To read a register, libunwind
+sets argument 
+write
+to zero and valp
+to point to the word that receives 
+the read value. To write a register, libunwind
+sets argument 
+write
+to a non\-zero value and valp
+to point to the word 
+that contains the value to be written. The word that valp
+points to is always in the byte\-order of the host\-platform, regardless 
+of the byte\-order of the target. In other words, it is the 
+responsibility of the call\-back routine to convert between the 
+target\&'s and the host\&'s byte\-order, if necessary. 
+.PP
+On successful completion, the access_reg()
+call\-back must 
+return zero. Otherwise, the negative value of one of the 
+unw_error_t
+error\-codes may be returned. 
+.PP
+.SS ACCESS_FPREG
+.PP
+Libunwind
+invokes the access_fpreg()
+call\-back to read 
+from or write to a floating\-point CPU register. The index of the 
+register to be accessed is passed in argument regnum\&.
+To read a 
+register, libunwind
+sets argument write
+to zero and 
+fpvalp
+to point to a variable of type unw_fpreg_t
+that 
+receives the read value. To write a register, libunwind
+sets 
+argument write
+to a non\-zero value and fpvalp
+to point to 
+the variable of type unw_fpreg_t
+that contains the value to 
+be written. The word that fpvalp
+points to is always in the 
+byte\-order of the host\-platform, regardless of the byte\-order of the 
+target. In other words, it is the responsibility of the call\-back 
+routine to convert between the target\&'s and the host\&'s byte\-order, if 
+necessary. 
+.PP
+On successful completion, the access_fpreg()
+call\-back must 
+return zero. Otherwise, the negative value of one of the 
+unw_error_t
+error\-codes may be returned. 
+.PP
+.SS RESUME
+.PP
+Libunwind
+invokes the resume()
+call\-back to resume 
+execution in the target address space. Argument cp
+is the 
+unwind\-cursor that identifies the stack\-frame in which execution 
+should resume. By the time libunwind
+invokes the resume
+call\-back, it has already established the desired machine\- and 
+memory\-state via calls to the access_reg(),
+access_fpreg,
+and access_mem()
+call\-backs. Thus, all 
+the call\-back needs to do is perform whatever action is needed to 
+actually resume execution. 
+.PP
+The resume
+call\-back is invoked only in response to a call to 
+unw_resume(3),
+so applications which never invoke 
+unw_resume(3)
+need not define the resume
+callback. 
+.PP
+On successful completion, the resume()
+call\-back must return 
+zero. Otherwise, the negative value of one of the 
+unw_error_t
+error\-codes may be returned. As a special case, 
+when resuming execution in the local address space, the call\-back will 
+not return on success. 
+.PP
+.SS GET_PROC_NAME
+.PP
+Libunwind
+invokes the get_proc_name()
+call\-back to 
+obtain the procedure\-name of a static (not dynamically generated) 
+procedure. Argument addr
+is an instruction\-address within the 
+procedure whose name is to be obtained. The bufp
+argument is a 
+pointer to a character\-buffer used to return the procedure name. The 
+size of this buffer is specified in argument buf_len\&.
+The 
+returned name must be terminated by a NUL character. If the 
+procedure\&'s name is longer than buf_len
+bytes, it must be 
+truncated to buf_len\-1
+bytes, with the last byte in the 
+buffer set to the NUL character and \-UNW_ENOMEM
+must be 
+returned. Argument offp
+is a pointer to a word which is used to 
+return the byte\-offset relative to the start of the procedure whose 
+name is being returned. For example, if procedure foo()
+starts 
+at address 0x40003000, then invoking get_proc_name()
+with 
+addr
+set to 0x40003080 should return a value of 0x80 in the word 
+pointed to by offp
+(assuming the procedure is at least 0x80 
+bytes long). 
+.PP
+On successful completion, the get_proc_name()
+call\-back must 
+return zero. Otherwise, the negative value of one of the 
+unw_error_t
+error\-codes may be returned. 
+.PP
+.SH RETURN VALUE
+
+.PP
+On successful completion, unw_create_addr_space()
+returns a 
+non\-NULL
+value that represents the newly created 
+address\-space. Otherwise, NULL
+is returned. 
+.PP
+.SH THREAD AND SIGNAL SAFETY
+
+.PP
+unw_create_addr_space()
+is thread\-safe but \fInot\fP
+safe to use from a signal handler. 
+.PP
+.SH SEE ALSO
+
+.PP
+_U_dyn_register(3),
+libunwind(3),
+unw_destroy_addr_space(3),
+unw_get_proc_info(3),
+unw_init_remote(3),
+unw_resume(3)
+.PP
+.SH AUTHOR
+
+.PP
+David Mosberger\-Tang
+.br
+Email: \fBdmosberger@gmail.com\fP
+.br
+WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
+.\" NOTE: This file is generated, DO NOT EDIT.
diff --git a/src/third_party/unwind/dist/doc/unw_create_addr_space.tex b/src/third_party/unwind/dist/doc/unw_create_addr_space.tex
new file mode 100644
index 00000000000..8de0691f3a9
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_create_addr_space.tex
@@ -0,0 +1,265 @@
+\documentclass{article}
+\usepackage[fancyhdr,pdf]{latex2man}
+
+\input{common.tex}
+
+\begin{document}
+
+\begin{Name}{3}{unw\_create\_addr\_space}{David Mosberger-Tang}{Programming Library}{unw\_create\_addr\_space}unw\_create\_addr\_space -- create address space for remote unwinding
+\end{Name}
+
+\section{Synopsis}
+
+\File{\#include $<$libunwind.h$>$}\\
+
+\Type{unw\_addr\_space\_t} \Func{unw\_create\_addr\_space}(\Type{unw\_accessors\_t~*}\Var{ap}, \Type{int} \Var{byteorder});\\
+
+\section{Description}
+
+The \Func{unw\_create\_addr\_space}() routine creates a new unwind
+address-space and initializes it based on the call-back routines
+passed via the \Var{ap} pointer and the specified \Var{byteorder}.
+The call-back routines are described in detail below.  The
+\Var{byteorder} can be set to 0 to request the default byte-order of
+the unwind target.  To request a particular byte-order,
+\Var{byteorder} can be set to any constant defined by
+\File{$<$endian.h$>$}.  In particular, \Const{\_\_LITTLE\_ENDIAN} would
+request little-endian byte-order and \Const{\_\_BIG\_ENDIAN} would
+request big-endian byte-order.  Whether or not a particular byte-order
+is supported depends on the target platform.
+
+\section{Call-back Routines}
+
+\Prog{Libunwind} uses a set of call-back routines to access the
+information it needs to unwind a chain of stack-frames.  These
+routines are specified via the \Var{ap} argument, which points to a
+variable of type \Type{unw\_accessors\_t}.  The contents of this
+variable is copied into the newly-created address space, so the
+variable must remain valid only for the duration of the call to
+\Func{unw\_create\_addr\_space}().
+
+The first argument to every call-back routine is an address-space
+identifier (\Var{as}) and the last argument is an arbitrary,
+application-specified void-pointer (\Var{arg}).  When invoking a
+call-back routine, \Prog{libunwind} sets the \Var{as} argument to the
+address-space on whose behalf the invocation is made and the \Var{arg}
+argument to the value that was specified when
+\Func{unw\_init\_remote}(3) was called.
+
+The synopsis and a detailed description of every call-back routine
+follows below.
+
+\subsection{Call-back Routine Synopsis}
+
+\Type{int} \Func{find\_proc\_info}(\Type{unw\_addr\_space\_t} \Var{as},\\
+\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\Type{unw\_word\_t} \Var{ip}, \Type{unw\_proc\_info\_t~*}\Var{pip},\\
+\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\Type{int} \Var{need\_unwind\_info}, \Type{void~*}arg);\\
+\Type{void} \Func{put\_unwind\_info}(\Type{unw\_addr\_space\_t} \Var{as},\\
+\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\Type{unw\_proc\_info\_t~*}pip, \Type{void~*}\Var{arg});\\
+\Type{int} \Func{get\_dyn\_info\_list\_addr}(\Type{unw\_addr\_space\_t} \Var{as},\\
+\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\Type{unw\_word\_t~*}\Var{dilap}, \Type{void~*}\Var{arg});\\
+\Type{int} \Func{access\_mem}(\Var{unw\_addr\_space\_t} \Var{as},\\
+\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\Type{unw\_word\_t} \Var{addr}, \Type{unw\_word\_t~*}\Var{valp},\\
+\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\Type{int} \Var{write}, \Type{void~*}\Var{arg});\\
+\Type{int} \Func{access\_reg}(\Var{unw\_addr\_space\_t} \Var{as},\\
+\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\Type{unw\_regnum\_t} \Var{regnum}, \Type{unw\_word\_t~*}\Var{valp},\\
+\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\Type{int} \Var{write}, \Type{void~*}\Var{arg});\\
+\Type{int} \Func{access\_fpreg}(\Var{unw\_addr\_space\_t} \Var{as},\\
+\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\Type{unw\_regnum\_t} \Var{regnum}, \Type{unw\_fpreg\_t~*}\Var{fpvalp},\\
+\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\Type{int} \Var{write}, \Type{void~*}\Var{arg});\\
+\Type{int} \Func{resume}(\Var{unw\_addr\_space\_t} \Var{as},\\
+\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\Type{unw\_cursor\_t~*}\Var{cp}, \Type{void~*}\Var{arg});\\
+\Type{int} \Func{get\_proc\_name}(\Type{unw\_addr\_space\_t} \Var{as},\\
+\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\Type{unw\_word\_t} \Var{addr}, \Type{char~*}\Var{bufp},\\
+\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\Type{size\_t} \Var{buf\_len}, \Type{unw\_word\_t~*}\Var{offp},\\
+\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\SP\Type{void~*}\Var{arg});\\
+
+\subsection{find\_proc\_info}
+
+\Prog{Libunwind} invokes the \Func{find\_proc\_info}() call-back to
+locate the information need to unwind a particular procedure.  The
+\Var{ip} argument is an instruction-address inside the procedure whose
+information is needed.  The \Var{pip} argument is a pointer to the
+variable used to return the desired information.  The type of this
+variable is \Type{unw\_proc\_info\_t}.  See
+\Func{unw\_get\_proc\_info(3)} for details.  Argument
+\Var{need\_unwind\_info} is zero if the call-back does not need to
+provide values for the following members in the
+\Type{unw\_proc\_info\_t} structure: \Var{format},
+\Var{unwind\_info\_size}, and \Var{unwind\_info}.  If
+\Var{need\_unwind\_info} is non-zero, valid values need to be returned
+in these members.  Furthermore, the contents of the memory addressed
+by the \Var{unwind\_info} member must remain valid until the info is
+released via the \Func{put\_unwind\_info} call-back (see below).
+
+On successful completion, the \Func{find\_proc\_info}() call-back must
+return zero.  Otherwise, the negative value of one of the
+\Type{unw\_error\_t} error-codes may be returned.  In particular, this
+call-back may return -\Const{UNW\_ESTOPUNWIND} to signal the end of
+the frame-chain.
+
+\subsection{put\_unwind\_info}
+
+\Prog{Libunwind} invokes the \Func{put\_unwind\_info}() call-back to
+release the resources (such as memory) allocated by a previous call to
+\Func{find\_proc\_info}() with the \Var{need\_unwind\_info} argument
+set to a non-zero value.  The \Var{pip} argument has the same value as
+the argument of the same name in the previous matching call to
+\Func{find\_proc\_info}().  Note that \Prog{libunwind} does \emph{not}
+invoke \Func{put\_unwind\_info} for calls to \Func{find\_proc\_info}()
+with a zero \Var{need\_unwind\_info} argument.
+
+
+\subsection{get\_dyn\_info\_list\_addr}
+
+\Prog{Libunwind} invokes the \Func{get\_dyn\_info\_list\_addr}()
+call-back to obtain the address of the head of the dynamic unwind-info
+registration list.  The variable stored at the returned address must
+have a type of \Type{unw\_dyn\_info\_list\_t} (see
+\Func{\_U\_dyn\_register}(3)).  The \Var{dliap} argument is a pointer
+to a variable of type \Type{unw\_word\_t} which is used to return the
+address of the dynamic unwind-info registration list.  If no dynamic
+unwind-info registration list exist, the value pointed to by
+\Var{dliap} must be cleared to zero.  \Prog{Libunwind} will cache the
+value returned by \Func{get\_dyn\_info\_list\_addr}() if caching is
+enabled for the given address-space.  The cache can be cleared with a
+call to \Func{unw\_flush\_cache}().
+
+On successful completion, the \Func{get\_dyn\_info\_list\_addr}()
+call-back must return zero.  Otherwise, the negative value of one of
+the \Type{unw\_error\_t} error-codes may be returned.
+
+\subsection{access\_mem}
+
+\Prog{Libunwind} invokes the \Func{access\_mem}() call-back to read
+from or write to a word of memory in the target address-space.  The
+address of the word to be accessed is passed in argument \Var{addr}.
+To read memory, \Prog{libunwind} sets argument \Var{write} to zero and
+\Var{valp} to point to the word that receives the read value.  To
+write memory, \Prog{libunwind} sets argument \Var{write} to a non-zero
+value and \Var{valp} to point to the word that contains the value to
+be written.  The word that \Var{valp} points to is always in the
+byte-order of the host-platform, regardless of the byte-order of the
+target.  In other words, it is the responsibility of the call-back
+routine to convert between the target's and the host's byte-order, if
+necessary.
+
+On successful completion, the \Func{access\_mem}()
+call-back must return zero.  Otherwise, the negative value of one of
+the \Type{unw\_error\_t} error-codes may be returned.
+
+\subsection{access\_reg}
+
+\Prog{Libunwind} invokes the \Func{access\_reg}() call-back to read
+from or write to a scalar (non-floating-point) CPU register.  The
+index of the register to be accessed is passed in argument
+\Var{regnum}.  To read a register, \Prog{libunwind} sets argument
+\Var{write} to zero and \Var{valp} to point to the word that receives
+the read value.  To write a register, \Prog{libunwind} sets argument
+\Var{write} to a non-zero value and \Var{valp} to point to the word
+that contains the value to be written.  The word that \Var{valp}
+points to is always in the byte-order of the host-platform, regardless
+of the byte-order of the target.  In other words, it is the
+responsibility of the call-back routine to convert between the
+target's and the host's byte-order, if necessary.
+
+On successful completion, the \Func{access\_reg}() call-back must
+return zero.  Otherwise, the negative value of one of the
+\Type{unw\_error\_t} error-codes may be returned.
+
+\subsection{access\_fpreg}
+
+\Prog{Libunwind} invokes the \Func{access\_fpreg}() call-back to read
+from or write to a floating-point CPU register.  The index of the
+register to be accessed is passed in argument \Var{regnum}.  To read a
+register, \Prog{libunwind} sets argument \Var{write} to zero and
+\Var{fpvalp} to point to a variable of type \Type{unw\_fpreg\_t} that
+receives the read value.  To write a register, \Prog{libunwind} sets
+argument \Var{write} to a non-zero value and \Var{fpvalp} to point to
+the variable of type \Type{unw\_fpreg\_t} that contains the value to
+be written.  The word that \Var{fpvalp} points to is always in the
+byte-order of the host-platform, regardless of the byte-order of the
+target.  In other words, it is the responsibility of the call-back
+routine to convert between the target's and the host's byte-order, if
+necessary.
+
+On successful completion, the \Func{access\_fpreg}() call-back must
+return zero.  Otherwise, the negative value of one of the
+\Type{unw\_error\_t} error-codes may be returned.
+
+\subsection{resume}
+
+\Prog{Libunwind} invokes the \Func{resume}() call-back to resume
+execution in the target address space.  Argument \Var{cp} is the
+unwind-cursor that identifies the stack-frame in which execution
+should resume.  By the time \Prog{libunwind} invokes the \Func{resume}
+call-back, it has already established the desired machine- and
+memory-state via calls to the \Func{access\_reg}(),
+\Func{access\_fpreg}, and \Func{access\_mem}() call-backs.  Thus, all
+the call-back needs to do is perform whatever action is needed to
+actually resume execution.
+
+The \Func{resume} call-back is invoked only in response to a call to
+\Func{unw\_resume}(3), so applications which never invoke
+\Func{unw\_resume}(3) need not define the \Func{resume} callback.
+
+On successful completion, the \Func{resume}() call-back must return
+zero.  Otherwise, the negative value of one of the
+\Type{unw\_error\_t} error-codes may be returned.  As a special case,
+when resuming execution in the local address space, the call-back will
+not return on success.
+
+\subsection{get\_proc\_name}
+
+\Prog{Libunwind} invokes the \Func{get\_proc\_name}() call-back to
+obtain the procedure-name of a static (not dynamically generated)
+procedure.  Argument \Var{addr} is an instruction-address within the
+procedure whose name is to be obtained.  The \Var{bufp} argument is a
+pointer to a character-buffer used to return the procedure name.  The
+size of this buffer is specified in argument \Var{buf\_len}.  The
+returned name must be terminated by a NUL character.  If the
+procedure's name is longer than \Var{buf\_len} bytes, it must be
+truncated to \Var{buf\_len}\Prog{-1} bytes, with the last byte in the
+buffer set to the NUL character and -\Const{UNW\_ENOMEM} must be
+returned.  Argument \Var{offp} is a pointer to a word which is used to
+return the byte-offset relative to the start of the procedure whose
+name is being returned.  For example, if procedure \Func{foo}() starts
+at address 0x40003000, then invoking \Func{get\_proc\_name}() with
+\Var{addr} set to 0x40003080 should return a value of 0x80 in the word
+pointed to by \Var{offp} (assuming the procedure is at least 0x80
+bytes long).
+
+On successful completion, the \Func{get\_proc\_name}() call-back must
+return zero.  Otherwise, the negative value of one of the
+\Type{unw\_error\_t} error-codes may be returned.
+
+
+\section{Return Value}
+
+On successful completion, \Func{unw\_create\_addr\_space}() returns a
+non-\Const{NULL} value that represents the newly created
+address-space.  Otherwise, \Const{NULL} is returned.
+
+\section{Thread and Signal Safety}
+
+\Func{unw\_create\_addr\_space}() is thread-safe but \emph{not}
+safe to use from a signal handler.
+
+\section{See Also}
+
+\SeeAlso{\_U\_dyn\_register(3)},
+\SeeAlso{libunwind(3)},
+\SeeAlso{unw\_destroy\_addr\_space(3)},
+\SeeAlso{unw\_get\_proc\_info(3)},
+\SeeAlso{unw\_init\_remote(3)},
+\SeeAlso{unw\_resume(3)}
+
+\section{Author}
+
+\noindent
+David Mosberger-Tang\\
+Email: \Email{dmosberger@gmail.com}\\
+WWW: \URL{http://www.nongnu.org/libunwind/}.
+\LatexManEnd
+
+\end{document}
diff --git a/src/third_party/unwind/dist/doc/unw_destroy_addr_space.man b/src/third_party/unwind/dist/doc/unw_destroy_addr_space.man
new file mode 100644
index 00000000000..90c9777efba
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_destroy_addr_space.man
@@ -0,0 +1,57 @@
+'\" t
+.\" Manual page created with latex2man on Thu Aug 16 09:44:45 MDT 2007
+.\" NOTE: This file is generated, DO NOT EDIT.
+.de Vb
+.ft CW
+.nf
+..
+.de Ve
+.ft R
+
+.fi
+..
+.TH "UNW\\_DESTROY\\_ADDR\\_SPACE" "3" "16 August 2007" "Programming Library " "Programming Library "
+.SH NAME
+unw_destroy_addr_space
+\-\- destroy unwind address space 
+.PP
+.SH SYNOPSIS
+
+.PP
+#include <libunwind.h>
+.br
+.PP
+void
+unw_destroy_addr_space(unw_addr_space_t
+as);
+.br
+.PP
+.SH DESCRIPTION
+
+.PP
+The unw_destroy_addr_space()
+routine destroys the 
+address space specified by argument as
+and thereby releases 
+all associated resources (such as memory). 
+.PP
+Applications must not destroy the local address space 
+unw_local_addr_space\&.
+Attempting to do so results in 
+undefined behavior (e.g., the application may crash). 
+.PP
+.SH SEE ALSO
+
+.PP
+libunwind(3),
+unw_create_addr_space(3)
+.PP
+.SH AUTHOR
+
+.PP
+David Mosberger\-Tang
+.br
+Email: \fBdmosberger@gmail.com\fP
+.br
+WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
+.\" NOTE: This file is generated, DO NOT EDIT.
diff --git a/src/third_party/unwind/dist/doc/unw_destroy_addr_space.tex b/src/third_party/unwind/dist/doc/unw_destroy_addr_space.tex
new file mode 100644
index 00000000000..a66b10b4b0b
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_destroy_addr_space.tex
@@ -0,0 +1,40 @@
+\documentclass{article}
+\usepackage[fancyhdr,pdf]{latex2man}
+
+\input{common.tex}
+
+\begin{document}
+
+\begin{Name}{3}{unw\_destroy\_addr\_space}{David Mosberger-Tang}{Programming Library}{unw\_destroy\_addr\_space}unw\_destroy\_addr\_space -- destroy unwind address space
+\end{Name}
+
+\section{Synopsis}
+
+\File{\#include $<$libunwind.h$>$}\\
+
+\Type{void} \Func{unw\_destroy\_addr\_space}(\Type{unw\_addr\_space\_t} \Var{as});\\
+
+\section{Description}
+
+The \Func{unw\_destroy\_addr\_space}() routine destroys the
+address space specified by argument \Var{as} and thereby releases
+all associated resources (such as memory).
+
+Applications must not destroy the local address space
+\Var{unw\_local\_addr\_space}.  Attempting to do so results in
+undefined behavior (e.g., the application may crash).
+
+\section{See Also}
+
+\SeeAlso{libunwind(3)},
+\SeeAlso{unw\_create\_addr\_space(3)}
+
+\section{Author}
+
+\noindent
+David Mosberger-Tang\\
+Email: \Email{dmosberger@gmail.com}\\
+WWW: \URL{http://www.nongnu.org/libunwind/}.
+\LatexManEnd
+
+\end{document}
diff --git a/src/third_party/unwind/dist/doc/unw_flush_cache.man b/src/third_party/unwind/dist/doc/unw_flush_cache.man
new file mode 100644
index 00000000000..627449effe2
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_flush_cache.man
@@ -0,0 +1,93 @@
+'\" t
+.\" Manual page created with latex2man on Fri Dec  2 16:09:33 PST 2016
+.\" NOTE: This file is generated, DO NOT EDIT.
+.de Vb
+.ft CW
+.nf
+..
+.de Ve
+.ft R
+
+.fi
+..
+.TH "UNW\\_FLUSH\\_CACHE" "3" "02 December 2016" "Programming Library " "Programming Library "
+.SH NAME
+unw_flush_cache
+\-\- flush cached info 
+.PP
+.SH SYNOPSIS
+
+.PP
+#include <libunwind.h>
+.br
+.PP
+void
+unw_flush_cache(unw_addr_space_t
+as,
+unw_word_t
+lo,
+unw_word_t
+hi);
+.br
+.PP
+.SH DESCRIPTION
+
+.PP
+The unw_flush_cache()
+routine flushes all cached info as it 
+relates to address\-range lo
+to hi
+(non\-inclusive) in the 
+target address\-space as\&.
+In addition, all info cached for 
+address\-space as
+that is not tied to a particular code\-range is 
+also flushed. For example, the address of the dynamic registration 
+list is not tied to a code\-range and its cached value (if any) is 
+flushed by a call to this routine. The address range specified by 
+lo
+and hi
+should be understood as a hint: 
+unw_flush_cache()
+may flush more information than requested, 
+but \fInever\fP
+less. In other words, unw_flush_cache()
+may 
+overflush, but not underflush. 
+.PP
+As a special case, if arguments lo
+and hi
+are both 0, all 
+information cached on behalf of address space as
+is flushed. 
+.PP
+.SH RETURN VALUE
+
+.PP
+The unw_flush_cache()
+routine cannot fail and does not 
+return a value. 
+.PP
+.SH THREAD AND SIGNAL SAFETY
+
+.PP
+The unw_flush_cache()
+routine is thread\-safe as well as safe to 
+use from a signal handler. 
+.PP
+.SH SEE ALSO
+
+.PP
+libunwind(3),
+unw_set_caching_policy(3)
+unw_set_cache_size(3)
+.PP
+.SH AUTHOR
+
+.PP
+David Mosberger\-Tang
+.br
+Email: \fBdmosberger@gmail.com\fP
+.br
+WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
+.\" NOTE: This file is generated, DO NOT EDIT.
diff --git a/src/third_party/unwind/dist/doc/unw_flush_cache.tex b/src/third_party/unwind/dist/doc/unw_flush_cache.tex
new file mode 100644
index 00000000000..32319db5d15
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_flush_cache.tex
@@ -0,0 +1,58 @@
+\documentclass{article}
+\usepackage[fancyhdr,pdf]{latex2man}
+
+\input{common.tex}
+
+\begin{document}
+
+\begin{Name}{3}{unw\_flush\_cache}{David Mosberger-Tang}{Programming Library}{unw\_flush\_cache}unw\_flush\_cache -- flush cached info
+\end{Name}
+
+\section{Synopsis}
+
+\File{\#include $<$libunwind.h$>$}\\
+
+\Type{void} \Func{unw\_flush\_cache}(\Type{unw\_addr\_space\_t} \Var{as}, \Type{unw\_word\_t} \Var{lo}, \Type{unw\_word\_t} \Var{hi});\\
+
+\section{Description}
+
+The \Func{unw\_flush\_cache}() routine flushes all cached info as it
+relates to address-range \Var{lo} to \Var{hi} (non-inclusive) in the
+target address-space \Var{as}.  In addition, all info cached for
+address-space \Var{as} that is not tied to a particular code-range is
+also flushed.  For example, the address of the dynamic registration
+list is not tied to a code-range and its cached value (if any) is
+flushed by a call to this routine.  The address range specified by
+\Var{lo} and \Var{hi} should be understood as a hint:
+\Func{unw\_flush\_cache}() may flush more information than requested,
+but \emph{never} less.  In other words, \Func{unw\_flush\_cache}() may
+overflush, but not underflush.
+
+As a special case, if arguments \Var{lo} and \Var{hi} are both 0, all
+information cached on behalf of address space \Var{as} is flushed.
+
+\section{Return Value}
+
+The \Func{unw\_flush\_cache}() routine cannot fail and does not
+return a value.
+
+\section{Thread and Signal Safety}
+
+The \Func{unw\_flush\_cache}() routine is thread-safe as well as safe to
+use from a signal handler.
+
+\section{See Also}
+
+\SeeAlso{libunwind(3)},
+\SeeAlso{unw\_set\_caching\_policy(3)}
+\SeeAlso{unw\_set\_cache\_size(3)}
+
+\section{Author}
+
+\noindent
+David Mosberger-Tang\\
+Email: \Email{dmosberger@gmail.com}\\
+WWW: \URL{http://www.nongnu.org/libunwind/}.
+\LatexManEnd
+
+\end{document}
diff --git a/src/third_party/unwind/dist/doc/unw_get_accessors.man b/src/third_party/unwind/dist/doc/unw_get_accessors.man
new file mode 100644
index 00000000000..83fe4fcea6d
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_get_accessors.man
@@ -0,0 +1,79 @@
+'\" t
+.\" Manual page created with latex2man on Thu Aug 16 09:44:44 MDT 2007
+.\" NOTE: This file is generated, DO NOT EDIT.
+.de Vb
+.ft CW
+.nf
+..
+.de Ve
+.ft R
+
+.fi
+..
+.TH "UNW\\_GET\\_ACCESSORS" "3" "16 August 2007" "Programming Library " "Programming Library "
+.SH NAME
+unw_get_accessors
+\-\- get pointer to accessor call\-backs 
+.PP
+.SH SYNOPSIS
+
+.PP
+#include <libunwind.h>
+.br
+.PP
+unw_accessors_t *unw_get_accessors(unw_addr_space_t as);
+.br
+.PP
+.SH DESCRIPTION
+
+.PP
+The unw_get_accessors()
+routine returns a pointer to a 
+unw_accessors_t
+structure, which contains the call\-back 
+routines that were specified when address space as
+was created 
+(see unw_create_addr_space(3)).
+The returned pointer is 
+guaranteed to remain valid until address space as
+is destroyed 
+by a call to unw_destroy_addr_space(3).
+.PP
+Note that unw_get_accessors()
+can be used to retrieve the 
+call\-back routines for the local address space 
+unw_local_addr_space\&.
+.PP
+.SH RETURN VALUE
+
+.PP
+The unw_get_accessors()
+routine cannot fail and always 
+returns a valid (non\-NULL)
+pointer to an 
+unw_accessors_t
+structure. 
+.PP
+.SH THREAD AND SIGNAL SAFETY
+
+.PP
+The unw_get_accessors()
+routine is thread\-safe as well as 
+safe to use from a signal handler. 
+.PP
+.SH SEE ALSO
+
+.PP
+libunwind(3),
+unw_create_addr_space(3),
+unw_destroy_addr_space(3)
+.PP
+.SH AUTHOR
+
+.PP
+David Mosberger\-Tang
+.br
+Email: \fBdmosberger@gmail.com\fP
+.br
+WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
+.\" NOTE: This file is generated, DO NOT EDIT.
diff --git a/src/third_party/unwind/dist/doc/unw_get_accessors.tex b/src/third_party/unwind/dist/doc/unw_get_accessors.tex
new file mode 100644
index 00000000000..bf344a32de2
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_get_accessors.tex
@@ -0,0 +1,55 @@
+\documentclass{article}
+\usepackage[fancyhdr,pdf]{latex2man}
+
+\input{common.tex}
+
+\begin{document}
+
+\begin{Name}{3}{unw\_get\_accessors}{David Mosberger-Tang}{Programming Library}{unw\_get\_accessors}unw\_get\_accessors -- get pointer to accessor call-backs
+\end{Name}
+
+\section{Synopsis}
+
+\File{\#include $<$libunwind.h$>$}\\
+
+\Type{unw\_accessors\_t~*}\Func{unw\_get\_accessors}(\Type{unw\_addr\_space\_t~}\Var{as});\\
+
+\section{Description}
+
+The \Func{unw\_get\_accessors}() routine returns a pointer to a
+\Type{unw\_accessors\_t} structure, which contains the call-back
+routines that were specified when address space \Var{as} was created
+(see \Func{unw\_create\_addr\_space}(3)).  The returned pointer is
+guaranteed to remain valid until address space \Var{as} is destroyed
+by a call to \Func{unw\_destroy\_addr\_space}(3).
+
+Note that \Func{unw\_get\_accessors}() can be used to retrieve the
+call-back routines for the local address space
+\Var{unw\_local\_addr\_space}.
+
+\section{Return Value}
+
+The \Func{unw\_get\_accessors}() routine cannot fail and always
+returns a valid (non-\Const{NULL}) pointer to an
+\Type{unw\_accessors\_t} structure.
+
+\section{Thread and Signal Safety}
+
+The \Func{unw\_get\_accessors}() routine is thread-safe as well as
+safe to use from a signal handler.
+
+\section{See Also}
+
+\SeeAlso{libunwind(3)},
+\SeeAlso{unw\_create\_addr\_space(3)},
+\SeeAlso{unw\_destroy\_addr\_space(3)}
+
+\section{Author}
+
+\noindent
+David Mosberger-Tang\\
+Email: \Email{dmosberger@gmail.com}\\
+WWW: \URL{http://www.nongnu.org/libunwind/}.
+\LatexManEnd
+
+\end{document}
diff --git a/src/third_party/unwind/dist/doc/unw_get_fpreg.man b/src/third_party/unwind/dist/doc/unw_get_fpreg.man
new file mode 100644
index 00000000000..5e54ca13d3b
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_get_fpreg.man
@@ -0,0 +1,111 @@
+'\" t
+.\" Manual page created with latex2man on Thu Aug 16 09:44:45 MDT 2007
+.\" NOTE: This file is generated, DO NOT EDIT.
+.de Vb
+.ft CW
+.nf
+..
+.de Ve
+.ft R
+
+.fi
+..
+.TH "UNW\\_GET\\_FPREG" "3" "16 August 2007" "Programming Library " "Programming Library "
+.SH NAME
+unw_get_fpreg
+\-\- get contents of floating\-point register 
+.PP
+.SH SYNOPSIS
+
+.PP
+#include <libunwind.h>
+.br
+.PP
+int
+unw_get_fpreg(unw_cursor_t *cp,
+unw_regnum_t
+reg,
+unw_fpreg_t *valp);
+.br
+.PP
+.SH DESCRIPTION
+
+.PP
+The unw_get_fpreg()
+routine reads the value of floating\-point 
+register reg
+in the stack frame identified by cursor cp
+and stores the value in the variable pointed to by valp\&.
+.PP
+The register numbering is target\-dependent and described in separate 
+manual pages (e.g., libunwind\-ia64(3) for the IA\-64 target). 
+Furthermore, the exact set of accessible registers may depend on the 
+type of frame that cp
+is referring to. For ordinary stack 
+frames, it is normally possible to access only the preserved 
+(``callee\-saved\&'') registers and frame\-related registers (such as the 
+stack\-pointer). However, for signal frames (see 
+unw_is_signal_frame(3)),
+it is usually possible to access 
+all registers. 
+.PP
+Note that unw_get_fpreg()
+can only read the contents of 
+floating\-point registers. See unw_get_fpreg(3)
+for a way to 
+read registers which fit in a single word. 
+.PP
+.SH RETURN VALUE
+
+.PP
+On successful completion, unw_get_fpreg()
+returns 0. 
+Otherwise the negative value of one of the error\-codes below is 
+returned. 
+.PP
+.SH THREAD AND SIGNAL SAFETY
+
+.PP
+unw_get_fpreg()
+is thread\-safe as well as safe to use 
+from a signal handler. 
+.PP
+.SH ERRORS
+
+.PP
+.TP
+UNW_EUNSPEC
+ An unspecified error occurred. 
+.TP
+UNW_EBADREG
+ An attempt was made to read a register 
+that is either invalid or not accessible in the current frame. 
+.PP
+In addition, unw_get_fpreg()
+may return any error returned by 
+the access_mem(),
+access_reg(),
+and 
+access_fpreg()
+call\-backs (see 
+unw_create_addr_space(3)).
+.PP
+.SH SEE ALSO
+
+.PP
+libunwind(3),
+libunwind\-ia64(3),
+unw_get_reg(3),
+unw_is_fpreg(3),
+unw_is_signal_frame(3),
+unw_set_fpreg(3)
+.PP
+.SH AUTHOR
+
+.PP
+David Mosberger\-Tang
+.br
+Email: \fBdmosberger@gmail.com\fP
+.br
+WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
+.\" NOTE: This file is generated, DO NOT EDIT.
diff --git a/src/third_party/unwind/dist/doc/unw_get_fpreg.tex b/src/third_party/unwind/dist/doc/unw_get_fpreg.tex
new file mode 100644
index 00000000000..dd679adc06a
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_get_fpreg.tex
@@ -0,0 +1,77 @@
+\documentclass{article}
+\usepackage[fancyhdr,pdf]{latex2man}
+
+\input{common.tex}
+
+\begin{document}
+
+\begin{Name}{3}{unw\_get\_fpreg}{David Mosberger-Tang}{Programming Library}{unw\_get\_fpreg}unw\_get\_fpreg -- get contents of floating-point register
+\end{Name}
+
+\section{Synopsis}
+
+\File{\#include $<$libunwind.h$>$}\\
+
+\Type{int} \Func{unw\_get\_fpreg}(\Type{unw\_cursor\_t~*}\Var{cp}, \Type{unw\_regnum\_t} \Var{reg}, \Type{unw\_fpreg\_t~*}\Var{valp});\\
+
+\section{Description}
+
+The \Func{unw\_get\_fpreg}() routine reads the value of floating-point
+register \Var{reg} in the stack frame identified by cursor \Var{cp}
+and stores the value in the variable pointed to by \Var{valp}.
+
+The register numbering is target-dependent and described in separate
+manual pages (e.g., libunwind-ia64(3) for the IA-64 target).
+Furthermore, the exact set of accessible registers may depend on the
+type of frame that \Var{cp} is referring to.  For ordinary stack
+frames, it is normally possible to access only the preserved
+(``callee-saved'') registers and frame-related registers (such as the
+stack-pointer).  However, for signal frames (see
+\Func{unw\_is\_signal\_frame}(3)), it is usually possible to access
+all registers.
+
+Note that \Func{unw\_get\_fpreg}() can only read the contents of
+floating-point registers.  See \Func{unw\_get\_fpreg}(3) for a way to
+read registers which fit in a single word.
+
+\section{Return Value}
+
+On successful completion, \Func{unw\_get\_fpreg}() returns 0.
+Otherwise the negative value of one of the error-codes below is
+returned.
+
+\section{Thread and Signal Safety}
+
+\Func{unw\_get\_fpreg}() is thread-safe as well as safe to use
+from a signal handler.
+
+\section{Errors}
+
+\begin{Description}
+\item[\Const{UNW\_EUNSPEC}] An unspecified error occurred.
+\item[\Const{UNW\_EBADREG}] An attempt was made to read a register
+  that is either invalid or not accessible in the current frame.
+\end{Description}
+In addition, \Func{unw\_get\_fpreg}() may return any error returned by
+the \Func{access\_mem}(), \Func{access\_reg}(), and
+\Func{access\_fpreg}() call-backs (see
+\Func{unw\_create\_addr\_space}(3)).
+
+\section{See Also}
+
+\SeeAlso{libunwind(3)},
+\SeeAlso{libunwind-ia64(3)},
+\SeeAlso{unw\_get\_reg(3)},
+\SeeAlso{unw\_is\_fpreg(3)},
+\SeeAlso{unw\_is\_signal\_frame(3)},
+\SeeAlso{unw\_set\_fpreg(3)}
+
+\section{Author}
+
+\noindent
+David Mosberger-Tang\\
+Email: \Email{dmosberger@gmail.com}\\
+WWW: \URL{http://www.nongnu.org/libunwind/}.
+\LatexManEnd
+
+\end{document}
diff --git a/src/third_party/unwind/dist/doc/unw_get_proc_info.man b/src/third_party/unwind/dist/doc/unw_get_proc_info.man
new file mode 100644
index 00000000000..09eadee27ad
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_get_proc_info.man
@@ -0,0 +1,203 @@
+'\" t
+.\" Manual page created with latex2man on Thu Aug 16 09:44:44 MDT 2007
+.\" NOTE: This file is generated, DO NOT EDIT.
+.de Vb
+.ft CW
+.nf
+..
+.de Ve
+.ft R
+
+.fi
+..
+.TH "UNW\\_GET\\_PROC\\_INFO" "3" "16 August 2007" "Programming Library " "Programming Library "
+.SH NAME
+unw_get_proc_info
+\-\- get info on current procedure 
+.PP
+.SH SYNOPSIS
+
+.PP
+#include <libunwind.h>
+.br
+.PP
+int
+unw_get_proc_info(unw_cursor_t *cp,
+unw_proc_info_t *pip);
+.br
+.PP
+.SH DESCRIPTION
+
+.PP
+The unw_get_proc_info()
+routine returns auxiliary 
+information about the procedure that created the stack frame 
+identified by argument cp\&.
+The pip
+argument is a pointer 
+to a structure of type unw_proc_info_t
+which is used to 
+return the information. The unw_proc_info_t
+has the 
+following members: 
+.TP
+unw_word_t start_ip
+ The address of the first 
+instruction of the procedure. If this address cannot be determined 
+(e.g., due to lack of unwind information), the start_ip
+member is cleared to 0. 
+.br
+.TP
+unw_word_t end_ip
+ The address of the first 
+instruction \fIbeyond\fP
+the end of the procedure. If this address 
+cannot be determined (e.g., due to lack of unwind information), 
+the end_ip
+member is cleared to 0. 
+.br
+.TP
+unw_word_t lsda
+ The address of the 
+language\-specific data\-area (LSDA). This area normally contains 
+language\-specific information needed during exception handling. If 
+the procedure has no such area, this member is cleared to 0. 
+.br
+.TP
+unw_word_t handler
+ The address of the exception 
+handler routine. This is sometimes called the \fIpersonality\fP
+routine. If the procedure does not define 
+a personality routine, the handler
+member is cleared to 0. 
+.br
+.TP
+unw_word_t gp
+ The global\-pointer of the 
+procedure. On platforms that do not use a global pointer, this 
+member may contain an undefined value. On all other platforms, it 
+must be set either to the correct global\-pointer value of the 
+procedure or to 0 if the proper global\-pointer cannot be 
+obtained for some reason. 
+.br
+.TP
+unw_word_t flags
+ A set of flags. There are 
+currently no target\-independent flags. For the IA\-64 target, the 
+flag UNW_PI_FLAG_IA64_RBS_SWITCH
+is set if the 
+procedure may switch the register\-backing store.
+.br
+.TP
+int format
+ The format of the unwind\-info for this 
+procedure. If the unwind\-info consists of dynamic procedure info, 
+format
+is equal to UNW_INFO_FORMAT_DYNAMIC\&.
+If the 
+unwind\-info consists of a (target\-specific) unwind table, it is 
+equal to to UNW_INFO_FORMAT_TABLE\&.
+All other values are 
+reserved for future use by libunwind\&.
+This member exists 
+for use by the find_proc_info()
+call\-back (see 
+unw_create_addr_space(3)).
+The 
+unw_get_proc_info()
+routine 
+may return an undefined value in this member. 
+.br
+.TP
+int unwind_info_size
+ The size of the unwind\-info 
+in bytes. This member exists for use by the 
+find_proc_info()
+call\-back (see 
+unw_create_addr_space(3)).
+The 
+unw_get_proc_info()
+routine 
+may return an undefined value in this member.
+.br
+.TP
+void *unwind_info
+ The pointer to the unwind\-info. 
+If no unwind info is available, this member must be set to 
+NULL\&.
+This member exists for use by the 
+find_proc_info()
+call\-back (see 
+unw_create_addr_space(3)).
+The 
+unw_get_proc_info()
+routine 
+may return an undefined value in this member.
+.br
+.PP
+Note that for the purposes of libunwind,
+the code of a 
+procedure is assumed to occupy a single, contiguous range of 
+addresses. For this reason, it is alwas possible to describe the 
+extent of a procedure with the start_ip
+and end_ip
+members. If a single function/routine is split into multiple, 
+discontiguous pieces, libunwind
+will treat each piece as a 
+separate procedure. 
+.PP
+.SH RETURN VALUE
+
+.PP
+On successful completion, unw_get_proc_info()
+returns 0. 
+Otherwise the negative value of one of the error\-codes below is 
+returned. 
+.PP
+.SH THREAD AND SIGNAL SAFETY
+
+.PP
+unw_get_proc_info()
+is thread\-safe. If cursor cp
+is 
+in the local address\-space, this routine is also safe to use from a 
+signal handler. 
+.PP
+.SH ERRORS
+
+.PP
+.TP
+UNW_EUNSPEC
+ An unspecified error occurred. 
+.TP
+UNW_ENOINFO
+ Libunwind
+was unable to locate 
+unwind\-info for the procedure. 
+.TP
+UNW_EBADVERSION
+ The unwind\-info for the procedure has 
+version or format that is not understood by libunwind\&.
+.PP
+In addition, unw_get_proc_info()
+may return any error 
+returned by the access_mem()
+call\-back (see 
+unw_create_addr_space(3)).
+.PP
+.SH SEE ALSO
+
+.PP
+libunwind(3),
+unw_create_addr_space(3),
+unw_get_proc_name(3)
+.PP
+.SH AUTHOR
+
+.PP
+David Mosberger\-Tang
+.br
+Email: \fBdmosberger@gmail.com\fP
+.br
+WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
+.\" NOTE: This file is generated, DO NOT EDIT.
diff --git a/src/third_party/unwind/dist/doc/unw_get_proc_info.tex b/src/third_party/unwind/dist/doc/unw_get_proc_info.tex
new file mode 100644
index 00000000000..72621f1a651
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_get_proc_info.tex
@@ -0,0 +1,123 @@
+\documentclass{article}
+\usepackage[fancyhdr,pdf]{latex2man}
+
+\input{common.tex}
+
+\begin{document}
+
+\begin{Name}{3}{unw\_get\_proc\_info}{David Mosberger-Tang}{Programming Library}{unw\_get\_proc\_info}unw\_get\_proc\_info -- get info on current procedure
+\end{Name}
+
+\section{Synopsis}
+
+\File{\#include $<$libunwind.h$>$}\\
+
+\Type{int} \Func{unw\_get\_proc\_info}(\Type{unw\_cursor\_t~*}\Var{cp}, \Type{unw\_proc\_info\_t~*}\Var{pip});\\
+
+\section{Description}
+
+The \Func{unw\_get\_proc\_info}() routine returns auxiliary
+information about the procedure that created the stack frame
+identified by argument \Var{cp}.  The \Var{pip} argument is a pointer
+to a structure of type \Type{unw\_proc\_info\_t} which is used to
+return the information.  The \Type{unw\_proc\_info\_t} has the
+following members:
+\begin{description}
+\item[\Type{unw\_word\_t} \Var{start\_ip}] The address of the first
+  instruction of the procedure.  If this address cannot be determined
+  (e.g., due to lack of unwind information), the \Var{start\_ip}
+  member is cleared to 0.  \\
+\item[\Type{unw\_word\_t} \Var{end\_ip}] The address of the first
+  instruction \emph{beyond} the end of the procedure.  If this address
+  cannot be determined (e.g., due to lack of unwind information),
+  the \Var{end\_ip} member is cleared to 0.  \\
+\item[\Type{unw\_word\_t} \Var{lsda}] The address of the
+  language-specific data-area (LSDA).  This area normally contains
+  language-specific information needed during exception handling.  If
+  the procedure has no such area, this member is cleared to 0.  \\
+\item[\Type{unw\_word\_t} \Var{handler}] The address of the exception
+  handler routine.  This is sometimes called the \emph{personality}
+  routine.  If the procedure does not define
+  a personality routine, the \Var{handler} member is cleared to 0.  \\
+\item[\Type{unw\_word\_t} \Var{gp}] The global-pointer of the
+  procedure.  On platforms that do not use a global pointer, this
+  member may contain an undefined value.  On all other platforms, it
+  must be set either to the correct global-pointer value of the
+  procedure or to 0 if the proper global-pointer cannot be
+  obtained for some reason.  \\
+\item[\Type{unw\_word\_t} \Var{flags}] A set of flags.  There are
+  currently no target-independent flags.  For the IA-64 target, the
+  flag \Const{UNW\_PI\_FLAG\_IA64\_RBS\_SWITCH} is set if the
+  procedure may switch the register-backing store.\\
+\item[\Type{int} \Var{format}] The format of the unwind-info for this
+  procedure.  If the unwind-info consists of dynamic procedure info,
+  \Var{format} is equal to \Const{UNW\_INFO\_FORMAT\_DYNAMIC}.  If the
+  unwind-info consists of a (target-specific) unwind table, it is
+  equal to to \Const{UNW\_INFO\_FORMAT\_TABLE}.  All other values are
+  reserved for future use by \Prog{libunwind}.  This member exists
+  for use by the \Func{find\_proc\_info}() call-back (see
+  \Func{unw\_create\_addr\_space}(3)).  The
+  \Func{unw\_get\_proc\_info}() routine
+  may return an undefined value in this member. \\
+\item[\Type{int} \Var{unwind\_info\_size}] The size of the unwind-info
+  in bytes.  This member exists for use by the
+  \Func{find\_proc\_info}() call-back (see
+  \Func{unw\_create\_addr\_space}(3)).  The
+  \Func{unw\_get\_proc\_info}() routine
+  may return an undefined value in this member.\\
+\item[\Type{void~*}\Var{unwind\_info}] The pointer to the unwind-info.
+  If no unwind info is available, this member must be set to
+  \Const{NULL}.  This member exists for use by the
+  \Func{find\_proc\_info}() call-back (see
+  \Func{unw\_create\_addr\_space}(3)).  The
+  \Func{unw\_get\_proc\_info}() routine
+  may return an undefined value in this member.\\
+\end{description}
+Note that for the purposes of \Prog{libunwind}, the code of a
+procedure is assumed to occupy a single, contiguous range of
+addresses.  For this reason, it is alwas possible to describe the
+extent of a procedure with the \Var{start\_ip} and \Var{end\_ip}
+members.  If a single function/routine is split into multiple,
+discontiguous pieces, \Prog{libunwind} will treat each piece as a
+separate procedure.
+
+\section{Return Value}
+
+On successful completion, \Func{unw\_get\_proc\_info}() returns 0.
+Otherwise the negative value of one of the error-codes below is
+returned.
+
+\section{Thread and Signal Safety}
+
+\Func{unw\_get\_proc\_info}() is thread-safe.  If cursor \Var{cp} is
+in the local address-space, this routine is also safe to use from a
+signal handler.
+
+\section{Errors}
+
+\begin{Description}
+\item[\Const{UNW\_EUNSPEC}] An unspecified error occurred.
+\item[\Const{UNW\_ENOINFO}] \Prog{Libunwind} was unable to locate
+  unwind-info for the procedure.
+\item[\Const{UNW\_EBADVERSION}] The unwind-info for the procedure has
+  version or format that is not understood by \Prog{libunwind}.
+\end{Description}
+In addition, \Func{unw\_get\_proc\_info}() may return any error
+returned by the \Func{access\_mem}() call-back (see
+\Func{unw\_create\_addr\_space}(3)).
+
+\section{See Also}
+
+\SeeAlso{libunwind(3)},
+\SeeAlso{unw\_create\_addr\_space(3)},
+\SeeAlso{unw\_get\_proc\_name(3)}
+
+\section{Author}
+
+\noindent
+David Mosberger-Tang\\
+Email: \Email{dmosberger@gmail.com}\\
+WWW: \URL{http://www.nongnu.org/libunwind/}.
+\LatexManEnd
+
+\end{document}
diff --git a/src/third_party/unwind/dist/doc/unw_get_proc_info_by_ip.man b/src/third_party/unwind/dist/doc/unw_get_proc_info_by_ip.man
new file mode 100644
index 00000000000..a347a1d0089
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_get_proc_info_by_ip.man
@@ -0,0 +1,134 @@
+'\" t
+.\" Manual page created with latex2man on Thu Aug 16 09:44:45 MDT 2007
+.\" NOTE: This file is generated, DO NOT EDIT.
+.de Vb
+.ft CW
+.nf
+..
+.de Ve
+.ft R
+
+.fi
+..
+.TH "UNW\\_GET\\_PROC\\_INFO\\_BY\\_IP" "3" "16 August 2007" "Programming Library " "Programming Library "
+.SH NAME
+unw_get_proc_info_by_ip
+\-\- get procedure info by IP 
+.PP
+.SH SYNOPSIS
+
+.PP
+#include <libunwind.h>
+.br
+.PP
+int
+unw_get_proc_info_by_ip(unw_addr_space_t as,
+unw_word_t ip,
+unw_proc_info_t *pip,
+void *arg);
+.br
+.PP
+.SH DESCRIPTION
+
+.PP
+The unw_get_proc_info_by_ip()
+routine returns the same 
+kind of auxiliary information about a procedure as 
+unw_get_proc_info(),
+except that the info is looked up by 
+instruction\-pointer (IP) instead of a cursor. This is more flexible 
+because it is possible to look up the info for an arbitrary procedure, 
+even if it is not part of the current call\-chain. However, since it 
+is more flexible, it also tends to run slower (and often much slower) 
+than unw_get_proc_info().
+.PP
+The routine expects the followins arguments: as
+is the 
+address\-space in which the instruction\-pointer should be looked up. 
+For a look\-up in the local address\-space, 
+unw_local_addr_space
+can be passed for this argument. 
+Argument ip
+is the instruction\-pointer for which the procedure 
+info should be looked up and pip
+is a pointer to a structure of 
+type unw_proc_info_t
+which is used to return the info. 
+Lastly, arg
+is the address\-space argument that should be used 
+when accessing the address\-space. It has the same purpose as the 
+argument of the same name for unw_init_remote().
+When 
+accessing the local address\-space (first argument is 
+unw_local_addr_space),
+NULL
+must be passed for this 
+argument. 
+.PP
+Note that for the purposes of libunwind,
+the code of a 
+procedure is assumed to occupy a single, contiguous range of 
+addresses. For this reason, it is alwas possible to describe the 
+extent of a procedure with the start_ip
+and end_ip
+members. If a single function/routine is split into multiple, 
+discontiguous pieces, libunwind
+will treat each piece as a 
+separate procedure. 
+.PP
+.SH RETURN VALUE
+
+.PP
+On successful completion, unw_get_proc_info_by_ip()
+returns 0. Otherwise the negative value of one of the error\-codes 
+below is returned. 
+.PP
+.SH THREAD AND SIGNAL SAFETY
+
+.PP
+unw_get_proc_info()
+is thread\-safe. If the local 
+address\-space is passed in argument as,
+this routine is also 
+safe to use from a signal handler. 
+.PP
+.SH ERRORS
+
+.PP
+.TP
+UNW_EUNSPEC
+ An unspecified error occurred. 
+.TP
+UNW_ENOINFO
+ Libunwind
+was unable to locate 
+unwind\-info for the procedure. 
+.TP
+UNW_EBADVERSION
+ The unwind\-info for the procedure has 
+version or format that is not understood by libunwind\&.
+.PP
+In addition, unw_get_proc_info()
+may return any error 
+returned by the access_mem()
+call\-back (see 
+unw_create_addr_space(3)).
+.PP
+.SH SEE ALSO
+
+.PP
+libunwind(3),
+unw_create_addr_space(3),
+unw_get_proc_name(3),
+unw_get_proc_info(3),
+unw_init_remote(3)
+.PP
+.SH AUTHOR
+
+.PP
+David Mosberger\-Tang
+.br
+Email: \fBdmosberger@gmail.com\fP
+.br
+WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
+.\" NOTE: This file is generated, DO NOT EDIT.
diff --git a/src/third_party/unwind/dist/doc/unw_get_proc_info_by_ip.tex b/src/third_party/unwind/dist/doc/unw_get_proc_info_by_ip.tex
new file mode 100644
index 00000000000..5e1d5d247eb
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_get_proc_info_by_ip.tex
@@ -0,0 +1,91 @@
+\documentclass{article}
+\usepackage[fancyhdr,pdf]{latex2man}
+
+\input{common.tex}
+
+\begin{document}
+
+\begin{Name}{3}{unw\_get\_proc\_info\_by\_ip}{David Mosberger-Tang}{Programming Library}{unw\_get\_proc\_info\_by\_ip}unw\_get\_proc\_info\_by\_ip -- get procedure info by IP
+\end{Name}
+
+\section{Synopsis}
+
+\File{\#include $<$libunwind.h$>$}\\
+
+\Type{int} \Func{unw\_get\_proc\_info\_by\_ip}(\Type{unw\_addr\_space\_t~}\Var{as}, \Type{unw\_word\_t~}\Var{ip}, \Type{unw\_proc\_info\_t~*}\Var{pip}, \Type{void~*}\Var{arg});\\
+
+\section{Description}
+
+The \Func{unw\_get\_proc\_info\_by\_ip}() routine returns the same
+kind of auxiliary information about a procedure as
+\Func{unw\_get\_proc\_info}(), except that the info is looked up by
+instruction-pointer (IP) instead of a cursor.  This is more flexible
+because it is possible to look up the info for an arbitrary procedure,
+even if it is not part of the current call-chain.  However, since it
+is more flexible, it also tends to run slower (and often much slower)
+than \Func{unw\_get\_proc\_info}().
+
+The routine expects the followins arguments: \Var{as} is the
+address-space in which the instruction-pointer should be looked up.
+For a look-up in the local address-space,
+\Var{unw\_local\_addr\_space} can be passed for this argument.
+Argument \Var{ip} is the instruction-pointer for which the procedure
+info should be looked up and \Var{pip} is a pointer to a structure of
+type \Type{unw\_proc\_info\_t} which is used to return the info.
+Lastly, \Var{arg} is the address-space argument that should be used
+when accessing the address-space.  It has the same purpose as the
+argument of the same name for \Func{unw\_init\_remote}().  When
+accessing the local address-space (first argument is
+\Var{unw\_local\_addr\_space}), \Const{NULL} must be passed for this
+argument.
+
+Note that for the purposes of \Prog{libunwind}, the code of a
+procedure is assumed to occupy a single, contiguous range of
+addresses.  For this reason, it is alwas possible to describe the
+extent of a procedure with the \Var{start\_ip} and \Var{end\_ip}
+members.  If a single function/routine is split into multiple,
+discontiguous pieces, \Prog{libunwind} will treat each piece as a
+separate procedure.
+
+\section{Return Value}
+
+On successful completion, \Func{unw\_get\_proc\_info\_by\_ip}()
+returns 0.  Otherwise the negative value of one of the error-codes
+below is returned.
+
+\section{Thread and Signal Safety}
+
+\Func{unw\_get\_proc\_info}() is thread-safe.  If the local
+address-space is passed in argument \Var{as}, this routine is also
+safe to use from a signal handler.
+
+\section{Errors}
+
+\begin{Description}
+\item[\Const{UNW\_EUNSPEC}] An unspecified error occurred.
+\item[\Const{UNW\_ENOINFO}] \Prog{Libunwind} was unable to locate
+  unwind-info for the procedure.
+\item[\Const{UNW\_EBADVERSION}] The unwind-info for the procedure has
+  version or format that is not understood by \Prog{libunwind}.
+\end{Description}
+In addition, \Func{unw\_get\_proc\_info}() may return any error
+returned by the \Func{access\_mem}() call-back (see
+\Func{unw\_create\_addr\_space}(3)).
+
+\section{See Also}
+
+\SeeAlso{libunwind(3)},
+\SeeAlso{unw\_create\_addr\_space(3)},
+\SeeAlso{unw\_get\_proc\_name(3)},
+\SeeAlso{unw\_get\_proc\_info(3)},
+\SeeAlso{unw\_init\_remote(3)}
+
+\section{Author}
+
+\noindent
+David Mosberger-Tang\\
+Email: \Email{dmosberger@gmail.com}\\
+WWW: \URL{http://www.nongnu.org/libunwind/}.
+\LatexManEnd
+
+\end{document}
diff --git a/src/third_party/unwind/dist/doc/unw_get_proc_name.man b/src/third_party/unwind/dist/doc/unw_get_proc_name.man
new file mode 100644
index 00000000000..8b2bd06eaf0
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_get_proc_name.man
@@ -0,0 +1,123 @@
+'\" t
+.\" Manual page created with latex2man on Thu Aug 16 09:44:45 MDT 2007
+.\" NOTE: This file is generated, DO NOT EDIT.
+.de Vb
+.ft CW
+.nf
+..
+.de Ve
+.ft R
+
+.fi
+..
+.TH "UNW\\_GET\\_PROC\\_NAME" "3" "16 August 2007" "Programming Library " "Programming Library "
+.SH NAME
+unw_get_proc_name
+\-\- get name of current procedure 
+.PP
+.SH SYNOPSIS
+
+.PP
+#include <libunwind.h>
+.br
+.PP
+int
+unw_get_proc_name(unw_cursor_t *cp,
+char *bufp,
+size_t
+len,
+unw_word_t *offp);
+.br
+.PP
+.SH DESCRIPTION
+
+.PP
+The unw_get_proc_name()
+routine returns the name of the 
+procedure that created the stack frame identified by argument 
+cp\&.
+The bufp
+argument is a pointer to a character buffer 
+that is at least len
+bytes long. This buffer is used to return 
+the name of the procedure. The offp
+argument is a pointer to a 
+word that is used to return the byte\-offset of the instruction\-pointer 
+saved in the stack frame identified by cp,
+relative to the start 
+of the procedure. For example, if procedure foo()
+starts at 
+address 0x40003000, then invoking unw_get_proc_name()
+on a 
+stack frame with an instruction\-pointer value of 0x40003080 would 
+return a value of 0x80 in the word pointed to by offp
+(assuming 
+the procedure is at least 0x80 bytes long). 
+.PP
+Note that on some platforms there is no reliable way to distinguish 
+between procedure names and ordinary labels. Furthermore, if symbol 
+information has been stripped from a program, procedure names may be 
+completely unavailable or may be limited to those exported via a 
+dynamic symbol table. In such cases, unw_get_proc_name()
+may return the name of a label or a preceeding (nearby) procedure. 
+However, the offset returned through offp
+is always relative to 
+the returned name, which ensures that the value (address) of the 
+returned name plus the returned offset will always be equal to the 
+instruction\-pointer of the stack frame identified by cp\&.
+.PP
+.SH RETURN VALUE
+
+.PP
+On successful completion, unw_get_proc_name()
+returns 0. 
+Otherwise the negative value of one of the error\-codes below is 
+returned. 
+.PP
+.SH THREAD AND SIGNAL SAFETY
+
+.PP
+unw_get_proc_name()
+is thread\-safe. If cursor cp
+is 
+in the local address\-space, this routine is also safe to use from a 
+signal handler. 
+.PP
+.SH ERRORS
+
+.PP
+.TP
+UNW_EUNSPEC
+ An unspecified error occurred. 
+.TP
+UNW_ENOINFO
+ Libunwind
+was unable to determine 
+the name of the procedure. 
+.TP
+UNW_ENOMEM
+ The procedure name is too long to fit 
+in the buffer provided. A truncated version of the name has been 
+returned. 
+.PP
+In addition, unw_get_proc_name()
+may return any error 
+returned by the access_mem()
+call\-back (see 
+unw_create_addr_space(3)).
+.PP
+.SH SEE ALSO
+
+.PP
+libunwind(3),
+unw_get_proc_info(3)
+.PP
+.SH AUTHOR
+
+.PP
+David Mosberger\-Tang
+.br
+Email: \fBdmosberger@gmail.com\fP
+.br
+WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
+.\" NOTE: This file is generated, DO NOT EDIT.
diff --git a/src/third_party/unwind/dist/doc/unw_get_proc_name.tex b/src/third_party/unwind/dist/doc/unw_get_proc_name.tex
new file mode 100644
index 00000000000..c413990880d
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_get_proc_name.tex
@@ -0,0 +1,82 @@
+\documentclass{article}
+\usepackage[fancyhdr,pdf]{latex2man}
+
+\input{common.tex}
+
+\begin{document}
+
+\begin{Name}{3}{unw\_get\_proc\_name}{David Mosberger-Tang}{Programming Library}{unw\_get\_proc\_name}unw\_get\_proc\_name -- get name of current procedure
+\end{Name}
+
+\section{Synopsis}
+
+\File{\#include $<$libunwind.h$>$}\\
+
+\Type{int} \Func{unw\_get\_proc\_name}(\Type{unw\_cursor\_t~*}\Var{cp}, \Type{char~*}\Var{bufp}, \Type{size\_t} \Var{len}, \Type{unw\_word\_t~*}\Var{offp});\\
+
+\section{Description}
+
+The \Func{unw\_get\_proc\_name}() routine returns the name of the
+procedure that created the stack frame identified by argument
+\Var{cp}.  The \Var{bufp} argument is a pointer to a character buffer
+that is at least \Var{len} bytes long.  This buffer is used to return
+the name of the procedure.  The \Var{offp} argument is a pointer to a
+word that is used to return the byte-offset of the instruction-pointer
+saved in the stack frame identified by \Var{cp}, relative to the start
+of the procedure.  For example, if procedure \Func{foo}() starts at
+address 0x40003000, then invoking \Func{unw\_get\_proc\_name}() on a
+stack frame with an instruction-pointer value of 0x40003080 would
+return a value of 0x80 in the word pointed to by \Var{offp} (assuming
+the procedure is at least 0x80 bytes long).
+
+Note that on some platforms there is no reliable way to distinguish
+between procedure names and ordinary labels.  Furthermore, if symbol
+information has been stripped from a program, procedure names may be
+completely unavailable or may be limited to those exported via a
+dynamic symbol table.  In such cases, \Func{unw\_get\_proc\_name}()
+may return the name of a label or a preceeding (nearby) procedure.
+However, the offset returned through \Var{offp} is always relative to
+the returned name, which ensures that the value (address) of the
+returned name plus the returned offset will always be equal to the
+instruction-pointer of the stack frame identified by \Var{cp}.
+
+\section{Return Value}
+
+On successful completion, \Func{unw\_get\_proc\_name}() returns 0.
+Otherwise the negative value of one of the error-codes below is
+returned.
+
+\section{Thread and Signal Safety}
+
+\Func{unw\_get\_proc\_name}() is thread-safe.  If cursor \Var{cp} is
+in the local address-space, this routine is also safe to use from a
+signal handler.
+
+\section{Errors}
+
+\begin{Description}
+\item[\Const{UNW\_EUNSPEC}] An unspecified error occurred.
+\item[\Const{UNW\_ENOINFO}] \Prog{Libunwind} was unable to determine
+  the name of the procedure.
+\item[\Const{UNW\_ENOMEM}] The procedure name is too long to fit
+  in the buffer provided.  A truncated version of the name has been
+  returned.
+\end{Description}
+In addition, \Func{unw\_get\_proc\_name}() may return any error
+returned by the \Func{access\_mem}() call-back (see
+\Func{unw\_create\_addr\_space}(3)).
+
+\section{See Also}
+
+\SeeAlso{libunwind(3)},
+\SeeAlso{unw\_get\_proc\_info(3)}
+
+\section{Author}
+
+\noindent
+David Mosberger-Tang\\
+Email: \Email{dmosberger@gmail.com}\\
+WWW: \URL{http://www.nongnu.org/libunwind/}.
+\LatexManEnd
+
+\end{document}
diff --git a/src/third_party/unwind/dist/doc/unw_get_reg.man b/src/third_party/unwind/dist/doc/unw_get_reg.man
new file mode 100644
index 00000000000..83e8bb43b64
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_get_reg.man
@@ -0,0 +1,112 @@
+'\" t
+.\" Manual page created with latex2man on Thu Aug 16 09:44:45 MDT 2007
+.\" NOTE: This file is generated, DO NOT EDIT.
+.de Vb
+.ft CW
+.nf
+..
+.de Ve
+.ft R
+
+.fi
+..
+.TH "UNW\\_GET\\_REG" "3" "16 August 2007" "Programming Library " "Programming Library "
+.SH NAME
+unw_get_reg
+\-\- get register contents 
+.PP
+.SH SYNOPSIS
+
+.PP
+#include <libunwind.h>
+.br
+.PP
+int
+unw_get_reg(unw_cursor_t *cp,
+unw_regnum_t
+reg,
+unw_word_t *valp);
+.br
+.PP
+.SH DESCRIPTION
+
+.PP
+The unw_get_reg()
+routine reads the value of register 
+reg
+in the stack frame identified by cursor cp
+and stores 
+the value in the word pointed to by valp\&.
+.PP
+The register numbering is target\-dependent and described in separate 
+manual pages (e.g., libunwind\-ia64(3) for the IA\-64 target). 
+Furthermore, the exact set of accessible registers may depend on the 
+type of frame that cp
+is referring to. For ordinary stack 
+frames, it is normally possible to access only the preserved 
+(``callee\-saved\&'') registers and frame\-related registers (such as the 
+stack\-pointer). However, for signal frames (see 
+unw_is_signal_frame(3)),
+it is usually possible to access 
+all registers. 
+.PP
+Note that unw_get_reg()
+can only read the contents of 
+registers whose values fit in a single word. See 
+unw_get_fpreg(3)
+for a way to read registers which do not fit 
+this constraint. 
+.PP
+.SH RETURN VALUE
+
+.PP
+On successful completion, unw_get_reg()
+returns 0. 
+Otherwise the negative value of one of the error\-codes below is 
+returned. 
+.PP
+.SH THREAD AND SIGNAL SAFETY
+
+.PP
+unw_get_reg()
+is thread\-safe as well as safe to use 
+from a signal handler. 
+.PP
+.SH ERRORS
+
+.PP
+.TP
+UNW_EUNSPEC
+ An unspecified error occurred. 
+.TP
+UNW_EBADREG
+ An attempt was made to read a register 
+that is either invalid or not accessible in the current frame. 
+.PP
+In addition, unw_get_reg()
+may return any error returned by 
+the access_mem(),
+access_reg(),
+and 
+access_fpreg()
+call\-backs (see 
+unw_create_addr_space(3)).
+.PP
+.SH SEE ALSO
+
+.PP
+libunwind(3),
+libunwind\-ia64(3),
+unw_get_fpreg(3),
+unw_is_signal_frame(3),
+unw_set_reg(3)
+.PP
+.SH AUTHOR
+
+.PP
+David Mosberger\-Tang
+.br
+Email: \fBdmosberger@gmail.com\fP
+.br
+WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
+.\" NOTE: This file is generated, DO NOT EDIT.
diff --git a/src/third_party/unwind/dist/doc/unw_get_reg.tex b/src/third_party/unwind/dist/doc/unw_get_reg.tex
new file mode 100644
index 00000000000..b66e8c0dbb4
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_get_reg.tex
@@ -0,0 +1,77 @@
+\documentclass{article}
+\usepackage[fancyhdr,pdf]{latex2man}
+
+\input{common.tex}
+
+\begin{document}
+
+\begin{Name}{3}{unw\_get\_reg}{David Mosberger-Tang}{Programming Library}{unw\_get\_reg}unw\_get\_reg -- get register contents
+\end{Name}
+
+\section{Synopsis}
+
+\File{\#include $<$libunwind.h$>$}\\
+
+\Type{int} \Func{unw\_get\_reg}(\Type{unw\_cursor\_t~*}\Var{cp}, \Type{unw\_regnum\_t} \Var{reg}, \Type{unw\_word\_t~*}\Var{valp});\\
+
+\section{Description}
+
+The \Func{unw\_get\_reg}() routine reads the value of register
+\Var{reg} in the stack frame identified by cursor \Var{cp} and stores
+the value in the word pointed to by \Var{valp}.
+
+The register numbering is target-dependent and described in separate
+manual pages (e.g., libunwind-ia64(3) for the IA-64 target).
+Furthermore, the exact set of accessible registers may depend on the
+type of frame that \Var{cp} is referring to.  For ordinary stack
+frames, it is normally possible to access only the preserved
+(``callee-saved'') registers and frame-related registers (such as the
+stack-pointer).  However, for signal frames (see
+\Func{unw\_is\_signal\_frame}(3)), it is usually possible to access
+all registers.
+
+Note that \Func{unw\_get\_reg}() can only read the contents of
+registers whose values fit in a single word.  See
+\Func{unw\_get\_fpreg}(3) for a way to read registers which do not fit
+this constraint.
+
+\section{Return Value}
+
+On successful completion, \Func{unw\_get\_reg}() returns 0.
+Otherwise the negative value of one of the error-codes below is
+returned.
+
+\section{Thread and Signal Safety}
+
+\Func{unw\_get\_reg}() is thread-safe as well as safe to use
+from a signal handler.
+
+\section{Errors}
+
+\begin{Description}
+\item[\Const{UNW\_EUNSPEC}] An unspecified error occurred.
+\item[\Const{UNW\_EBADREG}] An attempt was made to read a register
+  that is either invalid or not accessible in the current frame.
+\end{Description}
+In addition, \Func{unw\_get\_reg}() may return any error returned by
+the \Func{access\_mem}(), \Func{access\_reg}(), and
+\Func{access\_fpreg}() call-backs (see
+\Func{unw\_create\_addr\_space}(3)).
+
+\section{See Also}
+
+\SeeAlso{libunwind(3)},
+\SeeAlso{libunwind-ia64(3)},
+\SeeAlso{unw\_get\_fpreg(3)},
+\SeeAlso{unw\_is\_signal\_frame(3)},
+\SeeAlso{unw\_set\_reg(3)}
+
+\section{Author}
+
+\noindent
+David Mosberger-Tang\\
+Email: \Email{dmosberger@gmail.com}\\
+WWW: \URL{http://www.nongnu.org/libunwind/}.
+\LatexManEnd
+
+\end{document}
diff --git a/src/third_party/unwind/dist/doc/unw_getcontext.man b/src/third_party/unwind/dist/doc/unw_getcontext.man
new file mode 100644
index 00000000000..13725df9570
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_getcontext.man
@@ -0,0 +1,93 @@
+'\" t
+.\" Manual page created with latex2man on Thu Aug 16 09:44:45 MDT 2007
+.\" NOTE: This file is generated, DO NOT EDIT.
+.de Vb
+.ft CW
+.nf
+..
+.de Ve
+.ft R
+
+.fi
+..
+.TH "UNW\\_GETCONTEXT" "3" "16 August 2007" "Programming Library " "Programming Library "
+.SH NAME
+unw_getcontext
+\-\- get initial machine\-state 
+.PP
+.SH SYNOPSIS
+
+.PP
+#include <libunwind.h>
+.br
+.PP
+int
+unw_getcontext(unw_context_t *ucp);
+.br
+.PP
+.SH DESCRIPTION
+
+.PP
+The unw_getcontext()
+routine initializes the context structure 
+pointed to by ucp
+with the machine\-state of the call\-site. The 
+exact set of registers stored by unw_getcontext()
+is 
+platform\-specific, but, in general, at least all preserved 
+(``callee\-saved\&'') and all frame\-related registers, such as the 
+stack\-pointer, will be stored. 
+.PP
+This routine is normally implemented as a macro and applications 
+should not attempt to take its address. 
+.PP
+.SH PLATFORM\-SPECIFIC NOTES
+
+.PP
+On IA\-64, unw_context_t
+has a layout that is compatible with 
+that of ucontext_t
+and such structures can be initialized with 
+getcontext()
+instead of unw_getcontext().
+However, the 
+reverse is \fInot\fP
+true and it is \fInot\fP
+safe to use structures 
+initialized by unw_getcontext()
+in places where a structure 
+initialized by getcontext()
+is expected. The reason for this 
+asymmetry is that unw_getcontext()
+is optimized for maximum 
+performance and does not, for example, save the signal mask. 
+.PP
+.SH RETURN VALUE
+
+.PP
+On successful completion, unw_getcontext()
+returns 0. 
+Otherwise, a value of \-1 is returned. 
+.PP
+.SH THREAD AND SIGNAL SAFETY
+
+.PP
+unw_getcontext()
+is thread\-safe as well as safe to use 
+from a signal handler. 
+.PP
+.SH SEE ALSO
+
+.PP
+libunwind(3),
+unw_init_local(3)
+.PP
+.SH AUTHOR
+
+.PP
+David Mosberger\-Tang
+.br
+Email: \fBdmosberger@gmail.com\fP
+.br
+WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
+.\" NOTE: This file is generated, DO NOT EDIT.
diff --git a/src/third_party/unwind/dist/doc/unw_getcontext.tex b/src/third_party/unwind/dist/doc/unw_getcontext.tex
new file mode 100644
index 00000000000..fa3eb814b3f
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_getcontext.tex
@@ -0,0 +1,63 @@
+\documentclass{article}
+\usepackage[fancyhdr,pdf]{latex2man}
+
+\input{common.tex}
+
+\begin{document}
+
+\begin{Name}{3}{unw\_getcontext}{David Mosberger-Tang}{Programming Library}{unw\_getcontext}unw\_getcontext -- get initial machine-state
+\end{Name}
+
+\section{Synopsis}
+
+\File{\#include $<$libunwind.h$>$}\\
+
+\Type{int} \Func{unw\_getcontext}(\Type{unw\_context\_t~*}\Var{ucp});\\
+
+\section{Description}
+
+The \Func{unw\_getcontext}() routine initializes the context structure
+pointed to by \Var{ucp} with the machine-state of the call-site.  The
+exact set of registers stored by \Func{unw\_getcontext}() is
+platform-specific, but, in general, at least all preserved
+(``callee-saved'') and all frame-related registers, such as the
+stack-pointer, will be stored.
+
+This routine is normally implemented as a macro and applications
+should not attempt to take its address.
+
+\section{Platform-specific Notes}
+
+On IA-64, \Type{unw\_context\_t} has a layout that is compatible with
+that of \Type{ucontext\_t} and such structures can be initialized with
+\Func{getcontext}() instead of \Func{unw\_getcontext}().  However, the
+reverse is \emph{not} true and it is \emph{not} safe to use structures
+initialized by \Func{unw\_getcontext()} in places where a structure
+initialized by \Func{getcontext()} is expected. The reason for this
+asymmetry is that \Func{unw\_getcontext()} is optimized for maximum
+performance and does not, for example, save the signal mask.
+
+\section{Return Value}
+
+On successful completion, \Func{unw\_getcontext}() returns 0.
+Otherwise, a value of -1 is returned.
+
+\section{Thread and Signal Safety}
+
+\Func{unw\_getcontext}() is thread-safe as well as safe to use
+from a signal handler.
+
+\section{See Also}
+
+\SeeAlso{libunwind(3)},
+\SeeAlso{unw\_init\_local(3)}
+
+\section{Author}
+
+\noindent
+David Mosberger-Tang\\
+Email: \Email{dmosberger@gmail.com}\\
+WWW: \URL{http://www.nongnu.org/libunwind/}.
+\LatexManEnd
+
+\end{document}
diff --git a/src/third_party/unwind/dist/doc/unw_init_local.man b/src/third_party/unwind/dist/doc/unw_init_local.man
new file mode 100644
index 00000000000..301dd6f93bd
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_init_local.man
@@ -0,0 +1,124 @@
+'\" t
+.\" Manual page created with latex2man on Wed Aug 16 12:11:05 PDT 2017
+.\" NOTE: This file is generated, DO NOT EDIT.
+.de Vb
+.ft CW
+.nf
+..
+.de Ve
+.ft R
+
+.fi
+..
+.TH "UNW\\_INIT\\_LOCAL" "3" "16 August 2017" "Programming Library " "Programming Library "
+.SH NAME
+unw_init_local
+\-\- initialize cursor for local unwinding 
+.PP
+.SH SYNOPSIS
+
+.PP
+#include <libunwind.h>
+.br
+.PP
+int
+unw_init_local(unw_cursor_t *c,
+unw_context_t *ctxt);
+.br
+int
+unw_init_local2(unw_cursor_t *c,
+unw_context_t *ctxt,
+int
+flag);
+.br
+.PP
+.SH DESCRIPTION
+
+.PP
+The unw_init_local()
+routine initializes the unwind cursor 
+pointed to by c
+with the machine\-state in the context structure 
+pointed to by ctxt\&.
+As such, the machine\-state pointed to by 
+ctxt
+identifies the initial stack frame at which unwinding 
+starts. The machine\-state is expected to be one provided by a call to 
+unw_getcontext; as such, the instruction pointer may point to the 
+instruction after the last instruction of a function, and libunwind 
+will back\-up the instruction pointer before beginning a walk up the 
+call stack. The machine\-state must remain valid for the duration for 
+which the cursor c
+is in use. 
+.PP
+The unw_init_local()
+routine can be used only for unwinding in 
+the address space of the current process (i.e., for local unwinding). 
+For all other cases, unw_init_remote()
+must be used instead. 
+However, unwind performance may be better when using 
+unw_init_local().
+Also, unw_init_local()
+is 
+available even when UNW_LOCAL_ONLY
+has been defined before 
+including <libunwind.h>,
+whereas unw_init_remote()
+is not. 
+.PP
+If the unw_context_t is known to be a signal frame (i.e., from the 
+third argument in a sigaction handler on linux), 
+unw_init_local2()
+should be used for correct initialization 
+on some platforms, passing the UNW_INIT_SIGNAL_FRAME flag. 
+.PP
+.SH RETURN VALUE
+
+.PP
+On successful completion, unw_init_local()
+returns 0. 
+Otherwise the negative value of one of the error\-codes below is 
+returned. 
+.PP
+.SH THREAD AND SIGNAL SAFETY
+
+.PP
+unw_init_local()
+is thread\-safe as well as safe to use from a 
+signal handler. 
+.PP
+.SH ERRORS
+
+.PP
+.TP
+UNW_EINVAL
+ unw_init_local()
+was called in a 
+version of libunwind
+which supports remote unwinding only 
+(this normally happens when calling unw_init_local()
+for a 
+cross\-platform version of libunwind).
+.TP
+UNW_EUNSPEC
+ An unspecified error occurred. 
+.TP
+UNW_EBADREG
+ A register needed by unw_init_local()
+wasn\&'t accessible. 
+.PP
+.SH SEE ALSO
+
+.PP
+libunwind(3),
+unw_init_remote(3)
+.PP
+.SH AUTHOR
+
+.PP
+David Mosberger\-Tang
+.br
+Email: \fBdmosberger@gmail.com\fP
+.br
+WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
+.\" NOTE: This file is generated, DO NOT EDIT.
diff --git a/src/third_party/unwind/dist/doc/unw_init_local.tex b/src/third_party/unwind/dist/doc/unw_init_local.tex
new file mode 100644
index 00000000000..ff0d03bc77d
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_init_local.tex
@@ -0,0 +1,80 @@
+\documentclass{article}
+\usepackage[fancyhdr,pdf]{latex2man}
+
+\input{common.tex}
+
+\begin{document}
+
+\begin{Name}{3}{unw\_init\_local}{David Mosberger-Tang}{Programming Library}{unw\_init\_local}unw\_init\_local -- initialize cursor for local unwinding
+\end{Name}
+
+\section{Synopsis}
+
+\File{\#include $<$libunwind.h$>$}\\
+
+\Type{int} \Func{unw\_init\_local}(\Type{unw\_cursor\_t~*}\Var{c}, \Type{unw\_context\_t~*}\Var{ctxt});\\
+\Type{int} \Func{unw\_init\_local2}(\Type{unw\_cursor\_t~*}\Var{c}, \Type{unw\_context\_t~*}\Var{ctxt}, \Type{int} \Var{flag});\\
+
+\section{Description}
+
+The \Func{unw\_init\_local}() routine initializes the unwind cursor
+pointed to by \Var{c} with the machine-state in the context structure
+pointed to by \Var{ctxt}.  As such, the machine-state pointed to by
+\Var{ctxt} identifies the initial stack frame at which unwinding
+starts.  The machine-state is expected to be one provided by a call to
+unw_getcontext; as such, the instruction pointer may point to the
+instruction after the last instruction of a function, and libunwind
+will back-up the instruction pointer before beginning a walk up the
+call stack.  The machine-state must remain valid for the duration for
+which the cursor \Var{c} is in use.
+
+The \Func{unw\_init\_local}() routine can be used only for unwinding in
+the address space of the current process (i.e., for local unwinding).
+For all other cases, \Func{unw\_init\_remote}() must be used instead.
+However, unwind performance may be better when using
+\Func{unw\_init\_local}().  Also, \Func{unw\_init\_local}() is
+available even when \Const{UNW\_LOCAL\_ONLY} has been defined before
+including \File{$<$libunwind.h$>$}, whereas \Func{unw\_init\_remote}()
+is not.
+
+If the unw_context_t is known to be a signal frame (i.e., from the
+third argument in a sigaction handler on linux),
+\Func{unw\_init\_local2}() should be used for correct initialization
+on some platforms, passing the UNW_INIT_SIGNAL_FRAME flag.
+
+\section{Return Value}
+
+On successful completion, \Func{unw\_init\_local}() returns 0.
+Otherwise the negative value of one of the error-codes below is
+returned.
+
+\section{Thread and Signal Safety}
+
+\Func{unw\_init\_local}() is thread-safe as well as safe to use from a
+signal handler.
+
+\section{Errors}
+
+\begin{Description}
+\item[\Const{UNW\_EINVAL}] \Func{unw\_init\_local}() was called in a
+  version of \Prog{libunwind} which supports remote unwinding only
+  (this normally happens when calling \Func{unw\_init\_local}() for a
+  cross-platform version of \Prog{libunwind}).
+\item[\Const{UNW\_EUNSPEC}] An unspecified error occurred.
+\item[\Const{UNW\_EBADREG}] A register needed by \Func{unw\_init\_local}()
+  wasn't accessible.
+\end{Description}
+
+\section{See Also}
+
+\SeeAlso{libunwind(3)}, \SeeAlso{unw\_init\_remote(3)}
+
+\section{Author}
+
+\noindent
+David Mosberger-Tang\\
+Email: \Email{dmosberger@gmail.com}\\
+WWW: \URL{http://www.nongnu.org/libunwind/}.
+\LatexManEnd
+
+\end{document}
diff --git a/src/third_party/unwind/dist/doc/unw_init_local2.man b/src/third_party/unwind/dist/doc/unw_init_local2.man
new file mode 100644
index 00000000000..6cbbf008ab6
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_init_local2.man
@@ -0,0 +1 @@
+.so man3/unw_init_local.3
diff --git a/src/third_party/unwind/dist/doc/unw_init_remote.man b/src/third_party/unwind/dist/doc/unw_init_remote.man
new file mode 100644
index 00000000000..0acdac9617b
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_init_remote.man
@@ -0,0 +1,123 @@
+'\" t
+.\" Manual page created with latex2man on Thu Aug 16 09:44:45 MDT 2007
+.\" NOTE: This file is generated, DO NOT EDIT.
+.de Vb
+.ft CW
+.nf
+..
+.de Ve
+.ft R
+
+.fi
+..
+.TH "UNW\\_INIT\\_REMOTE" "3" "16 August 2007" "Programming Library " "Programming Library "
+.SH NAME
+unw_init_remote
+\-\- initialize cursor for remote unwinding 
+.PP
+.SH SYNOPSIS
+
+.PP
+#include <libunwind.h>
+.br
+.PP
+int
+unw_init_remote(unw_cursor_t *c,
+unw_addr_space_t as,
+void *arg);
+.br
+.PP
+.SH DESCRIPTION
+
+.PP
+The unw_init_remote()
+routine initializes the unwind cursor 
+pointed to by c
+for unwinding in the address space identified by 
+as\&.
+The as
+argument can either be set to 
+unw_local_addr_space
+(local address space) or to an arbitrary 
+address space created with unw_create_addr_space().
+.PP
+The arg
+void\-pointer tells the address space exactly what entity 
+should be unwound. For example, if unw_local_addr_space
+is 
+passed in as,
+then arg
+needs to be a pointer to a context 
+structure containing the machine\-state of the initial stack frame. 
+However, other address\-spaces may instead expect a process\-id, a 
+thread\-id, or a pointer to an arbitrary structure which identifies the 
+stack\-frame chain to be unwound. In other words, the interpretation 
+of arg
+is entirely dependent on the address\-space in use; 
+libunwind
+never interprets the argument in any way on its own. 
+.PP
+Note that unw_init_remote()
+can be used to initiate unwinding 
+in \fIany\fP
+process, including the local process in which the 
+unwinder itself is running. However, for local unwinding, it is 
+generally preferable to use unw_init_local()
+instead, because 
+it is easier to use and because it may perform better. 
+.PP
+.SH RETURN VALUE
+
+.PP
+On successful completion, unw_init_remote()
+returns 0. 
+Otherwise the negative value of one of the error\-codes below is 
+returned. 
+.PP
+.SH THREAD AND SIGNAL SAFETY
+
+.PP
+unw_init_remote()
+is thread\-safe. If the local address\-space 
+is passed in argument as,
+this routine is also safe to use from 
+a signal handler. 
+.PP
+.SH ERRORS
+
+.PP
+.TP
+UNW_EINVAL
+ unw_init_remote()
+was called in a 
+version of libunwind
+which supports local unwinding only 
+(this normally happens when defining UNW_LOCAL_ONLY
+before 
+including <libunwind.h>
+and then calling 
+unw_init_remote()).
+.TP
+UNW_EUNSPEC
+ An unspecified error occurred. 
+.TP
+UNW_EBADREG
+ A register needed by unw_init_remote()
+wasn\&'t accessible. 
+.PP
+.SH SEE ALSO
+
+.PP
+libunwind(3),
+unw_create_addr_space(3),
+unw_init_local(3)
+.PP
+.SH AUTHOR
+
+.PP
+David Mosberger\-Tang
+.br
+Email: \fBdmosberger@gmail.com\fP
+.br
+WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
+.\" NOTE: This file is generated, DO NOT EDIT.
diff --git a/src/third_party/unwind/dist/doc/unw_init_remote.tex b/src/third_party/unwind/dist/doc/unw_init_remote.tex
new file mode 100644
index 00000000000..9b4dc7997ae
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_init_remote.tex
@@ -0,0 +1,79 @@
+\documentclass{article}
+\usepackage[fancyhdr,pdf]{latex2man}
+
+\input{common.tex}
+
+\begin{document}
+
+\begin{Name}{3}{unw\_init\_remote}{David Mosberger-Tang}{Programming Library}{unw\_init\_remote}unw\_init\_remote -- initialize cursor for remote unwinding
+\end{Name}
+
+\section{Synopsis}
+
+\File{\#include $<$libunwind.h$>$}\\
+
+\Type{int} \Func{unw\_init\_remote}(\Type{unw\_cursor\_t~*}\Var{c}, \Type{unw\_addr\_space\_t~}\Var{as}, \Type{void~*}\Var{arg});\\
+
+\section{Description}
+
+The \Func{unw\_init\_remote}() routine initializes the unwind cursor
+pointed to by \Var{c} for unwinding in the address space identified by
+\Var{as}.  The \Var{as} argument can either be set to
+\Var{unw\_local\_addr\_space} (local address space) or to an arbitrary
+address space created with \Func{unw\_create\_addr\_space}().
+
+The \Var{arg} void-pointer tells the address space exactly what entity
+should be unwound.  For example, if \Var{unw\_local\_addr\_space} is
+passed in \Var{as}, then \Var{arg} needs to be a pointer to a context
+structure containing the machine-state of the initial stack frame.
+However, other address-spaces may instead expect a process-id, a
+thread-id, or a pointer to an arbitrary structure which identifies the
+stack-frame chain to be unwound.  In other words, the interpretation
+of \Var{arg} is entirely dependent on the address-space in use;
+\Prog{libunwind} never interprets the argument in any way on its own.
+
+Note that \Func{unw\_init\_remote}() can be used to initiate unwinding
+in \emph{any} process, including the local process in which the
+unwinder itself is running.  However, for local unwinding, it is
+generally preferable to use \Func{unw\_init\_local}() instead, because
+it is easier to use and because it may perform better.
+
+\section{Return Value}
+
+On successful completion, \Func{unw\_init\_remote}() returns 0.
+Otherwise the negative value of one of the error-codes below is
+returned.
+
+\section{Thread and Signal Safety}
+
+\Func{unw\_init\_remote}() is thread-safe.  If the local address-space
+is passed in argument \Var{as}, this routine is also safe to use from
+a signal handler.
+
+\section{Errors}
+
+\begin{Description}
+\item[\Const{UNW\_EINVAL}] \Func{unw\_init\_remote}() was called in a
+  version of \Prog{libunwind} which supports local unwinding only
+  (this normally happens when defining \Const{UNW\_LOCAL\_ONLY} before
+  including \File{$<$libunwind.h$>$} and then calling
+  \Func{unw\_init\_remote}()).
+\item[\Const{UNW\_EUNSPEC}] An unspecified error occurred.
+\item[\Const{UNW\_EBADREG}] A register needed by \Func{unw\_init\_remote}()
+  wasn't accessible.
+\end{Description}
+
+\section{See Also}
+
+\SeeAlso{libunwind(3)}, \SeeAlso{unw\_create\_addr\_space(3)},
+\SeeAlso{unw\_init\_local(3)}
+
+\section{Author}
+
+\noindent
+David Mosberger-Tang\\
+Email: \Email{dmosberger@gmail.com}\\
+WWW: \URL{http://www.nongnu.org/libunwind/}.
+\LatexManEnd
+
+\end{document}
diff --git a/src/third_party/unwind/dist/doc/unw_is_fpreg.man b/src/third_party/unwind/dist/doc/unw_is_fpreg.man
new file mode 100644
index 00000000000..0c26ec1bc74
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_is_fpreg.man
@@ -0,0 +1,73 @@
+'\" t
+.\" Manual page created with latex2man on Thu Aug 16 09:44:45 MDT 2007
+.\" NOTE: This file is generated, DO NOT EDIT.
+.de Vb
+.ft CW
+.nf
+..
+.de Ve
+.ft R
+
+.fi
+..
+.TH "UNW\\_IS\\_FPREG" "3" "16 August 2007" "Programming Library " "Programming Library "
+.SH NAME
+unw_is_fpreg
+\-\- check if a register is a floating\-point register 
+.PP
+.SH SYNOPSIS
+
+.PP
+#include <libunwind.h>
+.br
+.PP
+int
+unw_is_fpreg(unw_regnum_t
+reg);
+.br
+.PP
+.SH DESCRIPTION
+
+.PP
+The unw_is_fpreg()
+routine checks whether register number 
+reg
+is a floating\-point register. 
+.PP
+This routine is normally implemented as a macro and applications 
+should not attempt to take its address. 
+.PP
+.SH RETURN VALUE
+
+.PP
+The unw_is_fpreg()
+routine returns a non\-zero value if 
+reg
+is a floating\-point register. Otherwise, it returns a value 
+of 0. 
+.PP
+.SH THREAD AND SIGNAL SAFETY
+
+.PP
+unw_is_fpreg()
+is thread\-safe as well as safe to use 
+from a signal handler. 
+.PP
+.SH SEE ALSO
+
+.PP
+libunwind(3),
+unw_get_reg(3),
+unw_set_reg(3),
+unw_get_fpreg(3),
+unw_set_fpreg(3)
+.PP
+.SH AUTHOR
+
+.PP
+David Mosberger\-Tang
+.br
+Email: \fBdmosberger@gmail.com\fP
+.br
+WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
+.\" NOTE: This file is generated, DO NOT EDIT.
diff --git a/src/third_party/unwind/dist/doc/unw_is_fpreg.tex b/src/third_party/unwind/dist/doc/unw_is_fpreg.tex
new file mode 100644
index 00000000000..c28cdc9be4f
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_is_fpreg.tex
@@ -0,0 +1,52 @@
+\documentclass{article}
+\usepackage[fancyhdr,pdf]{latex2man}
+
+\input{common.tex}
+
+\begin{document}
+
+\begin{Name}{3}{unw\_is\_fpreg}{David Mosberger-Tang}{Programming Library}{unw\_is\_fpreg}unw\_is\_fpreg -- check if a register is a floating-point register
+\end{Name}
+
+\section{Synopsis}
+
+\File{\#include $<$libunwind.h$>$}\\
+
+\Type{int} \Func{unw\_is\_fpreg}(\Type{unw\_regnum\_t} \Var{reg});\\
+
+\section{Description}
+
+The \Func{unw\_is\_fpreg}() routine checks whether register number
+\Var{reg} is a floating-point register.
+
+This routine is normally implemented as a macro and applications
+should not attempt to take its address.
+
+\section{Return Value}
+
+The \Func{unw\_is\_fpreg}() routine returns a non-zero value if
+\Var{reg} is a floating-point register.  Otherwise, it returns a value
+of 0.
+
+\section{Thread and Signal Safety}
+
+\Func{unw\_is\_fpreg}() is thread-safe as well as safe to use
+from a signal handler.
+
+\section{See Also}
+
+\SeeAlso{libunwind(3)},
+\SeeAlso{unw\_get\_reg(3)},
+\SeeAlso{unw\_set\_reg(3)},
+\SeeAlso{unw\_get\_fpreg(3)},
+\SeeAlso{unw\_set\_fpreg(3)}
+
+\section{Author}
+
+\noindent
+David Mosberger-Tang\\
+Email: \Email{dmosberger@gmail.com}\\
+WWW: \URL{http://www.nongnu.org/libunwind/}.
+\LatexManEnd
+
+\end{document}
diff --git a/src/third_party/unwind/dist/doc/unw_is_signal_frame.man b/src/third_party/unwind/dist/doc/unw_is_signal_frame.man
new file mode 100644
index 00000000000..d9a7cda7b5f
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_is_signal_frame.man
@@ -0,0 +1,88 @@
+'\" t
+.\" Manual page created with latex2man on Thu Aug 16 09:44:45 MDT 2007
+.\" NOTE: This file is generated, DO NOT EDIT.
+.de Vb
+.ft CW
+.nf
+..
+.de Ve
+.ft R
+
+.fi
+..
+.TH "UNW\\_IS\\_SIGNAL\\_FRAME" "3" "16 August 2007" "Programming Library " "Programming Library "
+.SH NAME
+unw_is_signal_frame
+\-\- check if current frame is a signal frame 
+.PP
+.SH SYNOPSIS
+
+.PP
+#include <libunwind.h>
+.br
+.PP
+int
+unw_is_signal_frame(unw_cursor_t *cp);
+.br
+.PP
+.SH DESCRIPTION
+
+.PP
+The unw_is_signal_frame()
+routine returns a positive value 
+if the current frame identified by cp
+is a signal frame, and a 
+value of 0 otherwise. For the purpose of this discussion, a signal 
+frame is a frame that was created in response to a potentially 
+asynchronous interruption. For UNIX and UNIX\-like platforms, such 
+frames are normally created by the kernel when delivering a signal. 
+In a kernel\-environment, a signal frame might, for example, correspond 
+to a frame created in response to a device interrupt. 
+.PP
+Signal frames are somewhat unusual because the asynchronous nature of 
+the events that create them require storing the contents of registers 
+that are normally treated as scratch (``caller\-saved\&'') registers. 
+.PP
+.SH RETURN VALUE
+
+.PP
+On successful completion, unw_is_signal_frame()
+returns a 
+positive value if the current frame is a signal frame, or 0 if it is 
+not. Otherwise, a negative value of one of the error\-codes below is 
+returned. 
+.PP
+.SH THREAD AND SIGNAL SAFETY
+
+.PP
+unw_is_signal_frame()
+is thread\-safe as well as safe to use 
+from a signal handler. 
+.PP
+.SH ERRORS
+
+.PP
+.TP
+UNW_ENOINFO
+ Libunwind
+is unable to determine 
+whether or not the current frame is a signal frame. 
+.PP
+.SH SEE ALSO
+
+.PP
+libunwind(3),
+unw_get_reg(3),
+unw_set_reg(3),
+unw_get_fpreg(3),
+unw_set_fpreg(3)
+.PP
+.SH AUTHOR
+
+.PP
+David Mosberger\-Tang
+.br
+Email: \fBdmosberger@gmail.com\fP
+.br
+WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
+.\" NOTE: This file is generated, DO NOT EDIT.
diff --git a/src/third_party/unwind/dist/doc/unw_is_signal_frame.tex b/src/third_party/unwind/dist/doc/unw_is_signal_frame.tex
new file mode 100644
index 00000000000..f262e5600c1
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_is_signal_frame.tex
@@ -0,0 +1,67 @@
+\documentclass{article}
+\usepackage[fancyhdr,pdf]{latex2man}
+
+\input{common.tex}
+
+\begin{document}
+
+\begin{Name}{3}{unw\_is\_signal\_frame}{David Mosberger-Tang}{Programming Library}{unw\_is\_signal\_frame}unw\_is\_signal\_frame -- check if current frame is a signal frame
+\end{Name}
+
+\section{Synopsis}
+
+\File{\#include $<$libunwind.h$>$}\\
+
+\Type{int} \Func{unw\_is\_signal\_frame}(\Type{unw\_cursor\_t~*}\Var{cp});\\
+
+\section{Description}
+
+The \Func{unw\_is\_signal\_frame}() routine returns a positive value
+if the current frame identified by \Var{cp} is a signal frame, and a
+value of 0 otherwise.  For the purpose of this discussion, a signal
+frame is a frame that was created in response to a potentially
+asynchronous interruption.  For UNIX and UNIX-like platforms, such
+frames are normally created by the kernel when delivering a signal.
+In a kernel-environment, a signal frame might, for example, correspond
+to a frame created in response to a device interrupt.
+
+Signal frames are somewhat unusual because the asynchronous nature of
+the events that create them require storing the contents of registers
+that are normally treated as scratch (``caller-saved'') registers.
+
+\section{Return Value}
+
+On successful completion, \Func{unw\_is\_signal\_frame}() returns a
+positive value if the current frame is a signal frame, or 0 if it is
+not.  Otherwise, a negative value of one of the error-codes below is
+returned.
+
+\section{Thread and Signal Safety}
+
+\Func{unw\_is\_signal\_frame}() is thread-safe as well as safe to use
+from a signal handler.
+
+\section{Errors}
+
+\begin{Description}
+\item[\Const{UNW\_ENOINFO}] \Prog{Libunwind} is unable to determine
+  whether or not the current frame is a signal frame.
+\end{Description}
+
+\section{See Also}
+
+\SeeAlso{libunwind(3)},
+\SeeAlso{unw\_get\_reg(3)},
+\SeeAlso{unw\_set\_reg(3)},
+\SeeAlso{unw\_get\_fpreg(3)},
+\SeeAlso{unw\_set\_fpreg(3)}
+
+\section{Author}
+
+\noindent
+David Mosberger-Tang\\
+Email: \Email{dmosberger@gmail.com}\\
+WWW: \URL{http://www.nongnu.org/libunwind/}.
+\LatexManEnd
+
+\end{document}
diff --git a/src/third_party/unwind/dist/doc/unw_reg_states_iterate.man b/src/third_party/unwind/dist/doc/unw_reg_states_iterate.man
new file mode 100644
index 00000000000..e328ad2e38c
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_reg_states_iterate.man
@@ -0,0 +1,137 @@
+'\" t
+.\" Manual page created with latex2man on Wed Aug 16 11:09:44 PDT 2017
+.\" NOTE: This file is generated, DO NOT EDIT.
+.de Vb
+.ft CW
+.nf
+..
+.de Ve
+.ft R
+
+.fi
+..
+.TH "UNW\\_REG\\_STATES\\_ITERATE" "3" "16 August 2017" "Programming Library " "Programming Library "
+.SH NAME
+unw_reg_states_iterate
+\-\- get register state info on current procedure 
+.PP
+.SH SYNOPSIS
+
+.PP
+#include <libunwind.h>
+.br
+.PP
+int
+unw_reg_states_iterate(unw_cursor_t *cp,
+unw_reg_states_callbackcb,
+void *token);
+.br
+.PP
+.SH DESCRIPTION
+
+.PP
+The unw_reg_states_iterate()
+routine provides 
+information about the procedure that created the stack frame 
+identified by argument cp\&.
+The cb
+argument is a pointer 
+to a function of type unw_reg_states_callback
+which is used to 
+return the information. The function unw_reg_states_callback
+has the 
+following definition: 
+.PP
+int
+( *unw_reg_states_callback)(void *token,
+void *reg_states_data,
+size_t
+reg_states_data_size,
+unw_word_t
+start_ip,
+unw_word_t
+end_ip);
+.PP
+The callback function may be invoked several times for each call of unw_reg_states_iterate\&.
+Each call is associcated with a instruction address range and a set of instructions on how to update register values when returning from the procedure in that address range. For each invocation, the arguments to the callback function are: 
+.TP
+void * token
+ The token value passed to unw_reg_states_callback\&.
+.br
+.TP
+void * reg_states_data
+ A pointer to data about 
+updating register values. This data, or a copy of it, can be passed 
+to unw_apply_reg_state\&.
+.br
+.TP
+int reg_states_data_size
+ The size of the register update data. 
+.br
+.TP
+unw_word_t start_ip
+ The address of the first 
+instruction of the address range. 
+.br
+.TP
+unw_word_t end_ip
+ The address of the first 
+instruction \fIbeyond\fP
+the end of the address range. 
+.br
+.PP
+.SH RETURN VALUE
+
+.PP
+On successful completion, unw_reg_states_iterate()
+returns 
+0. If the callback function returns a nonzero value, that indicates 
+failure and the function returns immediately. Otherwise the negative 
+value of one of the error\-codes below is returned. 
+.PP
+.SH THREAD AND SIGNAL SAFETY
+
+.PP
+unw_reg_states_iterate()
+is thread\-safe. If cursor cp
+is 
+in the local address\-space, this routine is also safe to use from a 
+signal handler. 
+.PP
+.SH ERRORS
+
+.PP
+.TP
+UNW_EUNSPEC
+ An unspecified error occurred. 
+.TP
+UNW_ENOINFO
+ Libunwind
+was unable to locate 
+unwind\-info for the procedure. 
+.TP
+UNW_EBADVERSION
+ The unwind\-info for the procedure has 
+version or format that is not understood by libunwind\&.
+.PP
+In addition, unw_reg_states_iterate()
+may return any error 
+returned by the access_mem()
+call\-back (see 
+unw_create_addr_space(3)).
+.PP
+.SH SEE ALSO
+
+.PP
+libunwind(3),
+unw_apply_reg_state(3)
+.PP
+.SH AUTHOR
+
+.PP
+David Mosberger\-Tang
+.br
+Email: \fBdmosberger@gmail.com\fP
+.br
+WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
+.\" NOTE: This file is generated, DO NOT EDIT.
diff --git a/src/third_party/unwind/dist/doc/unw_reg_states_iterate.tex b/src/third_party/unwind/dist/doc/unw_reg_states_iterate.tex
new file mode 100644
index 00000000000..36c9b548a25
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_reg_states_iterate.tex
@@ -0,0 +1,83 @@
+\documentclass{article}
+\usepackage[fancyhdr,pdf]{latex2man}
+
+\input{common.tex}
+
+\begin{document}
+
+\begin{Name}{3}{unw\_reg\_states\_iterate}{David Mosberger-Tang}{Programming Library}{unw\_reg\_states\_iterate}unw\_reg\_states\_iterate -- get register state info on current procedure
+\end{Name}
+
+\section{Synopsis}
+
+\File{\#include $<$libunwind.h$>$}\\
+
+\Type{int} \Func{unw\_reg\_states\_iterate}(\Type{unw\_cursor\_t~*}\Var{cp}, \Type{unw\_reg\_states\_callback}\Var{cb}, \Type{void~*}\Var{token});\\
+
+\section{Description}
+
+The \Func{unw\_reg\_states\_iterate}() routine provides
+information about the procedure that created the stack frame
+identified by argument \Var{cp}.  The \Var{cb} argument is a pointer
+to a function of type \Type{unw\_reg\_states\_callback} which is used to
+return the information.  The function \Type{unw\_reg\_states\_callback} has the
+following definition:
+
+\Type{int} (~*\Var{unw\_reg\_states\_callback})(\Type{void~*}\Var{token},
+			\Type{void~*}\Var{reg\_states\_data},
+			\Type{size\_t} \Var{reg\_states\_data\_size},
+			\Type{unw\_word\_t} \Var{start\_ip}, \Type{unw\_word\_t} \Var{end\_ip});
+
+The callback function may be invoked several times for each call of \Func{unw\_reg\_states\_iterate}. Each call is associcated with a instruction address range and a set of instructions on how to update register values when returning from the procedure in that address range.  For each invocation, the arguments to the callback function are:
+\begin{description}
+\item[\Type{void~*} \Var{token}] The token value passed to \Var{unw\_reg\_states\_callback}. \\
+\item[\Type{void~*} \Var{reg\_states\_data}] A pointer to data about
+  updating register values. This data, or a copy of it, can be passed
+  to \Var{unw\_apply\_reg\_state}.\\
+\item[\Type{int} \Var{reg\_states\_data\_size}] The size of the register update data. \\
+\item[\Type{unw\_word\_t} \Var{start\_ip}] The address of the first
+  instruction of the address range.  \\
+\item[\Type{unw\_word\_t} \Var{end\_ip}] The address of the first
+  instruction \emph{beyond} the end of the address range.  \\
+\end{description}
+
+\section{Return Value}
+
+On successful completion, \Func{unw\_reg\_states\_iterate}() returns
+0.  If the callback function returns a nonzero value, that indicates
+failure and the function returns immediately.  Otherwise the negative
+value of one of the error-codes below is returned.
+
+\section{Thread and Signal Safety}
+
+\Func{unw\_reg\_states\_iterate}() is thread-safe.  If cursor \Var{cp} is
+in the local address-space, this routine is also safe to use from a
+signal handler.
+
+\section{Errors}
+
+\begin{Description}
+\item[\Const{UNW\_EUNSPEC}] An unspecified error occurred.
+\item[\Const{UNW\_ENOINFO}] \Prog{Libunwind} was unable to locate
+  unwind-info for the procedure.
+\item[\Const{UNW\_EBADVERSION}] The unwind-info for the procedure has
+  version or format that is not understood by \Prog{libunwind}.
+\end{Description}
+In addition, \Func{unw\_reg\_states\_iterate}() may return any error
+returned by the \Func{access\_mem}() call-back (see
+\Func{unw\_create\_addr\_space}(3)).
+
+\section{See Also}
+
+\SeeAlso{libunwind(3)},
+\SeeAlso{unw\_apply\_reg\_state(3)}
+
+\section{Author}
+
+\noindent
+David Mosberger-Tang\\
+Email: \Email{dmosberger@gmail.com}\\
+WWW: \URL{http://www.nongnu.org/libunwind/}.
+\LatexManEnd
+
+\end{document}
diff --git a/src/third_party/unwind/dist/doc/unw_regname.man b/src/third_party/unwind/dist/doc/unw_regname.man
new file mode 100644
index 00000000000..1e3e2dbc6ea
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_regname.man
@@ -0,0 +1,68 @@
+'\" t
+.\" Manual page created with latex2man on Thu Aug 16 09:44:45 MDT 2007
+.\" NOTE: This file is generated, DO NOT EDIT.
+.de Vb
+.ft CW
+.nf
+..
+.de Ve
+.ft R
+
+.fi
+..
+.TH "UNW\\_REGNAME" "3" "16 August 2007" "Programming Library " "Programming Library "
+.SH NAME
+unw_regname
+\-\- get register name 
+.PP
+.SH SYNOPSIS
+
+.PP
+#include <libunwind.h>
+.br
+.PP
+const char *unw_regname(unw_regnum_t
+regnum);
+.br
+.PP
+.SH DESCRIPTION
+
+.PP
+The unw_regname()
+routine returns a printable name for 
+register regnum\&.
+If regnum
+is an invalid or otherwise 
+unrecognized register number, a string consisting of three question 
+marks is returned. The returned string is statically allocated and 
+therefore guaranteed to remain valid until the application terminates. 
+.PP
+.SH RETURN VALUE
+
+.PP
+The unw_regname()
+routine cannot fail and always returns a 
+valid (non\-NULL)
+string. 
+.PP
+.SH THREAD AND SIGNAL SAFETY
+
+.PP
+The unw_regname()
+routine is thread\-safe as well as safe to 
+use from a signal handler. 
+.PP
+.SH SEE ALSO
+
+.PP
+libunwind(3)
+.PP
+.SH AUTHOR
+
+.PP
+David Mosberger\-Tang
+.br
+Email: \fBdmosberger@gmail.com\fP
+.br
+WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
+.\" NOTE: This file is generated, DO NOT EDIT.
diff --git a/src/third_party/unwind/dist/doc/unw_regname.tex b/src/third_party/unwind/dist/doc/unw_regname.tex
new file mode 100644
index 00000000000..94b6434194d
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_regname.tex
@@ -0,0 +1,47 @@
+\documentclass{article}
+\usepackage[fancyhdr,pdf]{latex2man}
+
+\input{common.tex}
+
+\begin{document}
+
+\begin{Name}{3}{unw\_regname}{David Mosberger-Tang}{Programming Library}{unw\_regname}unw\_regname -- get register name
+\end{Name}
+
+\section{Synopsis}
+
+\File{\#include $<$libunwind.h$>$}\\
+
+\Type{const char~*}\Func{unw\_regname}(\Type{unw\_regnum\_t} \Var{regnum});\\
+
+\section{Description}
+
+The \Func{unw\_regname}() routine returns a printable name for
+register \Var{regnum}.  If \Var{regnum} is an invalid or otherwise
+unrecognized register number, a string consisting of three question
+marks is returned.  The returned string is statically allocated and
+therefore guaranteed to remain valid until the application terminates.
+
+\section{Return Value}
+
+The \Func{unw\_regname}() routine cannot fail and always returns a
+valid (non-\Const{NULL}) string.
+
+\section{Thread and Signal Safety}
+
+The \Func{unw\_regname}() routine is thread-safe as well as safe to
+use from a signal handler.
+
+\section{See Also}
+
+\SeeAlso{libunwind(3)}
+
+\section{Author}
+
+\noindent
+David Mosberger-Tang\\
+Email: \Email{dmosberger@gmail.com}\\
+WWW: \URL{http://www.nongnu.org/libunwind/}.
+\LatexManEnd
+
+\end{document}
diff --git a/src/third_party/unwind/dist/doc/unw_resume.man b/src/third_party/unwind/dist/doc/unw_resume.man
new file mode 100644
index 00000000000..1bf38327bf0
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_resume.man
@@ -0,0 +1,146 @@
+'\" t
+.\" Manual page created with latex2man on Thu Aug 16 09:44:45 MDT 2007
+.\" NOTE: This file is generated, DO NOT EDIT.
+.de Vb
+.ft CW
+.nf
+..
+.de Ve
+.ft R
+
+.fi
+..
+.TH "UNW\\_RESUME" "3" "16 August 2007" "Programming Library " "Programming Library "
+.SH NAME
+unw_resume
+\-\- resume execution in a particular stack frame 
+.PP
+.SH SYNOPSIS
+
+.PP
+#include <libunwind.h>
+.br
+.PP
+int
+unw_resume(unw_cursor_t *cp);
+.br
+.PP
+.SH DESCRIPTION
+
+.PP
+The unw_resume()
+routine resumes execution at the stack frame 
+identified by cp\&.
+The behavior of this routine differs 
+slightly for local and remote unwinding. 
+.PP
+For local unwinding, unw_resume()
+restores the machine state 
+and then directly resumes execution in the target stack frame. Thus 
+unw_resume()
+does not return in this case. Restoring the 
+machine state normally involves restoring the ``preserved\&'' 
+(callee\-saved) registers. However, if execution in any of the stack 
+frames younger (more deeply nested) than the one identified by 
+cp
+was interrupted by a signal, then unw_resume()
+will 
+restore all registers as well as the signal mask. Attempting to call 
+unw_resume()
+on a cursor which identifies the stack frame of 
+another thread results in undefined behavior (e.g., the program may 
+crash). 
+.PP
+For remote unwinding, unw_resume()
+installs the machine state 
+identified by the cursor by calling the access_reg
+and 
+access_fpreg
+accessor callbacks as needed. Once that is 
+accomplished, the resume
+accessor callback is invoked. The 
+unw_resume
+routine then returns normally (that is, unlikely 
+for local unwinding, unw_resume
+will always return for remote 
+unwinding). 
+.PP
+Most platforms reserve some registers to pass arguments to exception 
+handlers (e.g., IA\-64 uses r15\-r18
+for this 
+purpose). These registers are normally treated like ``scratch\&'' 
+registers. However, if libunwind
+is used to set an exception 
+argument register to a particular value (e.g., via 
+unw_set_reg()),
+then unw_resume()
+will install this 
+value as the contents of the register. In other words, the exception 
+handling arguments are installed even in cases where normally only the 
+``preserved\&'' registers are restored. 
+.PP
+Note that unw_resume()
+does \fInot\fP
+invoke any unwind 
+handlers (aka, ``personality routines\&''). If a program needs this, it 
+will have to do so on its own by obtaining the unw_proc_info_t
+of each unwound frame and appropriately processing its unwind handler 
+and language\-specific data area (lsda). These steps are generally 
+dependent on the target\-platform and are regulated by the 
+processor\-specific ABI (application\-binary interface). 
+.PP
+.SH RETURN VALUE
+
+.PP
+For local unwinding, unw_resume()
+does not return on success. 
+For remote unwinding, it returns 0 on success. On failure, the 
+negative value of one of the errors below is returned. 
+.PP
+.SH THREAD AND SIGNAL SAFETY
+
+.PP
+unw_resume()
+is thread\-safe. If cursor cp
+is in the 
+local address\-space, this routine is also safe to use from a signal 
+handler. 
+.PP
+.SH ERRORS
+
+.PP
+.TP
+UNW_EUNSPEC
+ An unspecified error occurred. 
+.TP
+UNW_EBADREG
+ A register needed by unw_resume()
+wasn\&'t 
+accessible. 
+.TP
+UNW_EINVALIDIP
+ The instruction pointer identified by 
+cp
+is not valid. 
+.TP
+UNW_BADFRAME
+ The stack frame identified by 
+cp
+is not valid. 
+.PP
+.SH SEE ALSO
+
+.PP
+libunwind(3),
+unw_set_reg(3),
+sigprocmask(2) 
+.PP
+.SH AUTHOR
+
+.PP
+David Mosberger\-Tang
+.br
+Email: \fBdmosberger@gmail.com\fP
+.br
+WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
+.\" NOTE: This file is generated, DO NOT EDIT.
diff --git a/src/third_party/unwind/dist/doc/unw_resume.tex b/src/third_party/unwind/dist/doc/unw_resume.tex
new file mode 100644
index 00000000000..38b18248ab6
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_resume.tex
@@ -0,0 +1,99 @@
+\documentclass{article}
+\usepackage[fancyhdr,pdf]{latex2man}
+
+\input{common.tex}
+
+\begin{document}
+
+\begin{Name}{3}{unw\_resume}{David Mosberger-Tang}{Programming Library}{unw\_resume}unw\_resume -- resume execution in a particular stack frame
+\end{Name}
+
+\section{Synopsis}
+
+\File{\#include $<$libunwind.h$>$}\\
+
+\Type{int} \Func{unw\_resume}(\Type{unw\_cursor\_t~*}\Var{cp});\\
+
+\section{Description}
+
+The \Func{unw\_resume}() routine resumes execution at the stack frame
+identified by \Var{cp}.  The behavior of this routine differs
+slightly for local and remote unwinding.
+
+For local unwinding, \Func{unw\_resume}() restores the machine state
+and then directly resumes execution in the target stack frame.  Thus
+\Func{unw\_resume}() does not return in this case.  Restoring the
+machine state normally involves restoring the ``preserved''
+(callee-saved) registers.  However, if execution in any of the stack
+frames younger (more deeply nested) than the one identified by
+\Var{cp} was interrupted by a signal, then \Func{unw\_resume}() will
+restore all registers as well as the signal mask.  Attempting to call
+\Func{unw\_resume}() on a cursor which identifies the stack frame of
+another thread results in undefined behavior (e.g., the program may
+crash).
+
+For remote unwinding, \Func{unw\_resume}() installs the machine state
+identified by the cursor by calling the \Func{access\_reg} and
+\Func{access\_fpreg} accessor callbacks as needed.  Once that is
+accomplished, the \Func{resume} accessor callback is invoked.  The
+\Func{unw\_resume} routine then returns normally (that is, unlikely
+for local unwinding, \Func{unw\_resume} will always return for remote
+unwinding).
+
+Most platforms reserve some registers to pass arguments to exception
+handlers (e.g., IA-64 uses \texttt{r15}-\texttt{r18} for this
+purpose).  These registers are normally treated like ``scratch''
+registers.  However, if \Prog{libunwind} is used to set an exception
+argument register to a particular value (e.g., via
+\Func{unw\_set\_reg}()), then \Func{unw\_resume}() will install this
+value as the contents of the register.  In other words, the exception
+handling arguments are installed even in cases where normally only the
+``preserved'' registers are restored.
+
+Note that \Func{unw\_resume}() does \emph{not} invoke any unwind
+handlers (aka, ``personality routines'').  If a program needs this, it
+will have to do so on its own by obtaining the \Type{unw\_proc\_info\_t}
+of each unwound frame and appropriately processing its unwind handler
+and language-specific data area (lsda).  These steps are generally
+dependent on the target-platform and are regulated by the
+processor-specific ABI (application-binary interface).
+
+\section{Return Value}
+
+For local unwinding, \Func{unw\_resume}() does not return on success.
+For remote unwinding, it returns 0 on success.  On failure, the
+negative value of one of the errors below is returned.
+
+\section{Thread and Signal Safety}
+
+\Func{unw\_resume}() is thread-safe.  If cursor \Var{cp} is in the
+local address-space, this routine is also safe to use from a signal
+handler.
+
+\section{Errors}
+
+\begin{Description}
+\item[\Const{UNW\_EUNSPEC}] An unspecified error occurred.
+\item[\Const{UNW\_EBADREG}] A register needed by \Func{unw\_resume}() wasn't
+  accessible.
+\item[\Const{UNW\_EINVALIDIP}] The instruction pointer identified by
+  \Var{cp} is not valid.
+\item[\Const{UNW\_BADFRAME}] The stack frame identified by
+  \Var{cp} is not valid.
+\end{Description}
+
+\section{See Also}
+
+\SeeAlso{libunwind(3)},
+\SeeAlso{unw\_set\_reg(3)},
+sigprocmask(2)
+
+\section{Author}
+
+\noindent
+David Mosberger-Tang\\
+Email: \Email{dmosberger@gmail.com}\\
+WWW: \URL{http://www.nongnu.org/libunwind/}.
+\LatexManEnd
+
+\end{document}
diff --git a/src/third_party/unwind/dist/doc/unw_set_cache_size.man b/src/third_party/unwind/dist/doc/unw_set_cache_size.man
new file mode 100644
index 00000000000..34bbc539614
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_set_cache_size.man
@@ -0,0 +1,88 @@
+'\" t
+.\" Manual page created with latex2man on Fri Jan 13 08:33:21 PST 2017
+.\" NOTE: This file is generated, DO NOT EDIT.
+.de Vb
+.ft CW
+.nf
+..
+.de Ve
+.ft R
+
+.fi
+..
+.TH "UNW\\_SET\\_CACHE\\_SIZE" "3" "13 January 2017" "Programming Library " "Programming Library "
+.SH NAME
+unw_set_cache_size
+\-\- set unwind cache size 
+.PP
+.SH SYNOPSIS
+
+.PP
+#include <libunwind.h>
+.br
+.PP
+int
+unw_set_cache_size(unw_addr_space_t
+as,
+size_t
+size,
+int
+flag);
+.br
+.PP
+.SH DESCRIPTION
+
+.PP
+The unw_set_cache_size()
+routine sets the cache size of 
+address space as
+to hold at least as many items as given by 
+argument size\&.
+It may hold more items as determined by the 
+implementation. To disable caching, call 
+unw_set_caching_policy)
+with a policy of 
+UNW_CACHE_NONE\&.
+Flag is currently unused and must be 0. 
+.PP
+.SH RETURN VALUE
+
+.PP
+On successful completion, unw_set_cache_size()
+returns 0. 
+Otherwise the negative value of one of the error\-codes below is 
+returned. 
+.PP
+.SH THREAD AND SIGNAL SAFETY
+
+.PP
+unw_set_cache_size()
+is thread\-safe but \fInot\fP
+safe 
+to use from a signal handler. 
+.PP
+.SH ERRORS
+
+.PP
+.TP
+UNW_ENOMEM
+ The desired cache size could not be 
+established because the application is out of memory. 
+.PP
+.SH SEE ALSO
+
+.PP
+libunwind(3),
+unw_create_addr_space(3),
+unw_set_caching_policy(3),
+unw_flush_cache(3)
+.PP
+.SH AUTHOR
+
+.PP
+Dave Watson
+.br
+Email: \fBdade.watson@gmail.com\fP
+.br
+WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
+.\" NOTE: This file is generated, DO NOT EDIT.
diff --git a/src/third_party/unwind/dist/doc/unw_set_cache_size.tex b/src/third_party/unwind/dist/doc/unw_set_cache_size.tex
new file mode 100644
index 00000000000..1bd7e00df7c
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_set_cache_size.tex
@@ -0,0 +1,59 @@
+\documentclass{article}
+\usepackage[fancyhdr,pdf]{latex2man}
+
+\input{common.tex}
+
+\begin{document}
+
+\begin{Name}{3}{unw\_set\_cache\_size}{Dave Watson}{Programming Library}{unw\_set\_cache\_size}unw\_set\_cache\_size -- set unwind cache size
+\end{Name}
+
+\section{Synopsis}
+
+\File{\#include $<$libunwind.h$>$}\\
+
+\Type{int} \Func{unw\_set\_cache\_size}(\Type{unw\_addr\_space\_t} \Var{as}, \Type{size\_t} \Var{size}, \Type{int} \Var{flag});\\
+
+\section{Description}
+
+The \Func{unw\_set\_cache\_size}() routine sets the cache size of
+address space \Var{as} to hold at least as many items as given by
+argument \Var{size}.  It may hold more items as determined by the
+implementation.  To disable caching, call
+\Func{unw\_set\_caching\_policy}) with a policy of
+\Const{UNW\_CACHE\_NONE}.  Flag is currently unused and must be 0.
+
+\section{Return Value}
+
+On successful completion, \Func{unw\_set\_cache\_size}() returns 0.
+Otherwise the negative value of one of the error-codes below is
+returned.
+
+\section{Thread and Signal Safety}
+
+\Func{unw\_set\_cache\_size}() is thread-safe but \emph{not} safe
+to use from a signal handler.
+
+\section{Errors}
+
+\begin{Description}
+\item[\Const{UNW\_ENOMEM}] The desired cache size could not be
+  established because the application is out of memory.
+\end{Description}
+
+\section{See Also}
+
+\SeeAlso{libunwind(3)},
+\SeeAlso{unw\_create\_addr\_space(3)},
+\SeeAlso{unw\_set\_caching\_policy(3)},
+\SeeAlso{unw\_flush\_cache(3)}
+
+\section{Author}
+
+\noindent
+Dave Watson\\
+Email: \Email{dade.watson@gmail.com}\\
+WWW: \URL{http://www.nongnu.org/libunwind/}.
+\LatexManEnd
+
+\end{document}
diff --git a/src/third_party/unwind/dist/doc/unw_set_caching_policy.man b/src/third_party/unwind/dist/doc/unw_set_caching_policy.man
new file mode 100644
index 00000000000..4862ea545e5
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_set_caching_policy.man
@@ -0,0 +1,119 @@
+'\" t
+.\" Manual page created with latex2man on Fri Dec  2 16:09:33 PST 2016
+.\" NOTE: This file is generated, DO NOT EDIT.
+.de Vb
+.ft CW
+.nf
+..
+.de Ve
+.ft R
+
+.fi
+..
+.TH "UNW\\_SET\\_CACHING\\_POLICY" "3" "02 December 2016" "Programming Library " "Programming Library "
+.SH NAME
+unw_set_caching_policy
+\-\- set unwind caching policy 
+.PP
+.SH SYNOPSIS
+
+.PP
+#include <libunwind.h>
+.br
+.PP
+int
+unw_set_caching_policy(unw_addr_space_t
+as,
+unw_caching_policy_t
+policy);
+.br
+.PP
+.SH DESCRIPTION
+
+.PP
+The unw_set_caching_policy()
+routine sets the caching policy 
+of address space as
+to the policy specified by argument 
+policy\&.
+The policy
+argument can take one of three 
+possible values: 
+.TP
+UNW_CACHE_NONE
+ Turns off caching completely. This 
+also implicitly flushes the contents of all caches as if 
+unw_flush_cache()
+had been called. 
+.TP
+UNW_CACHE_GLOBAL
+ Enables caching using a global cache 
+that is shared by all threads. If global caching is unavailable or 
+unsupported, libunwind
+may fall back on using a per\-thread 
+cache, as if UNW_CACHE_PER_THREAD
+had been specified. 
+.TP
+UNW_CACHE_PER_THREAD
+ Enables caching using 
+thread\-local caches. If a thread\-local caching are unavailable or 
+unsupported, libunwind
+may fall back on using a global cache, 
+as if UNW_CACHE_GLOBAL
+had been specified. 
+.PP
+If caching is enabled, an application must be prepared to make 
+appropriate calls to unw_flush_cache()
+whenever the target 
+changes in a way that could affect the validity of cached information. 
+For example, after unloading (removing) a shared library, 
+unw_flush_cache()
+would have to be called (at least) for the 
+address\-range that was covered by the shared library. 
+.PP
+For address spaces created via unw_create_addr_space(3),
+caching is turned off by default. For the local address space 
+unw_local_addr_space,
+caching is turned on by default. 
+.PP
+.SH RETURN VALUE
+
+.PP
+On successful completion, unw_set_caching_policy()
+returns 0. 
+Otherwise the negative value of one of the error\-codes below is 
+returned. 
+.PP
+.SH THREAD AND SIGNAL SAFETY
+
+.PP
+unw_set_caching_policy()
+is thread\-safe but \fInot\fP
+safe 
+to use from a signal handler. 
+.PP
+.SH ERRORS
+
+.PP
+.TP
+UNW_ENOMEM
+ The desired caching policy could not be 
+established because the application is out of memory. 
+.PP
+.SH SEE ALSO
+
+.PP
+libunwind(3),
+unw_create_addr_space(3),
+unw_set_cache_size(3),
+unw_flush_cache(3)
+.PP
+.SH AUTHOR
+
+.PP
+David Mosberger\-Tang
+.br
+Email: \fBdmosberger@gmail.com\fP
+.br
+WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
+.\" NOTE: This file is generated, DO NOT EDIT.
diff --git a/src/third_party/unwind/dist/doc/unw_set_caching_policy.tex b/src/third_party/unwind/dist/doc/unw_set_caching_policy.tex
new file mode 100644
index 00000000000..3a4b07e84af
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_set_caching_policy.tex
@@ -0,0 +1,81 @@
+\documentclass{article}
+\usepackage[fancyhdr,pdf]{latex2man}
+
+\input{common.tex}
+
+\begin{document}
+
+\begin{Name}{3}{unw\_set\_caching\_policy}{David Mosberger-Tang}{Programming Library}{unw\_set\_caching\_policy}unw\_set\_caching\_policy -- set unwind caching policy
+\end{Name}
+
+\section{Synopsis}
+
+\File{\#include $<$libunwind.h$>$}\\
+
+\Type{int} \Func{unw\_set\_caching\_policy}(\Type{unw\_addr\_space\_t} \Var{as}, \Type{unw\_caching\_policy\_t} \Var{policy});\\
+
+\section{Description}
+
+The \Func{unw\_set\_caching\_policy}() routine sets the caching policy
+of address space \Var{as} to the policy specified by argument
+\Var{policy}.  The \Var{policy} argument can take one of three
+possible values:
+\begin{description}
+\item[\Const{UNW\_CACHE\_NONE}] Turns off caching completely.  This
+  also implicitly flushes the contents of all caches as if
+  \Func{unw\_flush\_cache}() had been called.
+\item[\Const{UNW\_CACHE\_GLOBAL}] Enables caching using a global cache
+  that is shared by all threads.  If global caching is unavailable or
+  unsupported, \Prog{libunwind} may fall back on using a per-thread
+  cache, as if \Const{UNW\_CACHE\_PER\_THREAD} had been specified.
+\item[\Const{UNW\_CACHE\_PER\_THREAD}] Enables caching using
+  thread-local caches.  If a thread-local caching are unavailable or
+  unsupported, \Prog{libunwind} may fall back on using a global cache,
+  as if \Const{UNW\_CACHE\_GLOBAL} had been specified.
+\end{description}
+
+If caching is enabled, an application must be prepared to make
+appropriate calls to \Func{unw\_flush\_cache}() whenever the target
+changes in a way that could affect the validity of cached information.
+For example, after unloading (removing) a shared library,
+\Func{unw\_flush\_cache}() would have to be called (at least) for the
+address-range that was covered by the shared library.
+
+For address spaces created via \Func{unw\_create\_addr\_space}(3),
+caching is turned off by default.  For the local address space
+\Func{unw\_local\_addr\_space}, caching is turned on by default.
+
+\section{Return Value}
+
+On successful completion, \Func{unw\_set\_caching\_policy}() returns 0.
+Otherwise the negative value of one of the error-codes below is
+returned.
+
+\section{Thread and Signal Safety}
+
+\Func{unw\_set\_caching\_policy}() is thread-safe but \emph{not} safe
+to use from a signal handler.
+
+\section{Errors}
+
+\begin{Description}
+\item[\Const{UNW\_ENOMEM}] The desired caching policy could not be
+  established because the application is out of memory.
+\end{Description}
+
+\section{See Also}
+
+\SeeAlso{libunwind(3)},
+\SeeAlso{unw\_create\_addr\_space(3)},
+\SeeAlso{unw\_set\_cache\_size(3)},
+\SeeAlso{unw\_flush\_cache(3)}
+
+\section{Author}
+
+\noindent
+David Mosberger-Tang\\
+Email: \Email{dmosberger@gmail.com}\\
+WWW: \URL{http://www.nongnu.org/libunwind/}.
+\LatexManEnd
+
+\end{document}
diff --git a/src/third_party/unwind/dist/doc/unw_set_fpreg.man b/src/third_party/unwind/dist/doc/unw_set_fpreg.man
new file mode 100644
index 00000000000..6cefa54623c
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_set_fpreg.man
@@ -0,0 +1,117 @@
+'\" t
+.\" Manual page created with latex2man on Thu Aug 16 09:44:45 MDT 2007
+.\" NOTE: This file is generated, DO NOT EDIT.
+.de Vb
+.ft CW
+.nf
+..
+.de Ve
+.ft R
+
+.fi
+..
+.TH "UNW\\_SET\\_FPREG" "3" "16 August 2007" "Programming Library " "Programming Library "
+.SH NAME
+unw_set_fpreg
+\-\- set contents of floating\-point register 
+.PP
+.SH SYNOPSIS
+
+.PP
+#include <libunwind.h>
+.br
+.PP
+int
+unw_set_fpreg(unw_cursor_t *cp,
+unw_regnum_t
+reg,
+unw_fpreg_t
+val);
+.br
+.PP
+.SH DESCRIPTION
+
+.PP
+The unw_set_fpreg()
+routine sets the value of register 
+reg
+in the stack frame identified by cursor cp
+to the 
+value passed in val\&.
+.PP
+The register numbering is target\-dependent and described in separate 
+manual pages (e.g., libunwind\-ia64(3) for the IA\-64 target). 
+Furthermore, the exact set of accessible registers may depend on the 
+type of frame that cp
+is referring to. For ordinary stack 
+frames, it is normally possible to access only the preserved 
+(``callee\-saved\&'') registers and frame\-related registers (such as the 
+stack\-pointer). However, for signal frames (see 
+unw_is_signal_frame(3)),
+it is usually possible to access 
+all registers. 
+.PP
+Note that unw_set_fpreg()
+can only write the contents of 
+floating\-point registers. See unw_set_reg(3)
+for a way to 
+write registers which fit in a single word. 
+.PP
+.SH RETURN VALUE
+
+.PP
+On successful completion, unw_set_fpreg()
+returns 0. 
+Otherwise the negative value of one of the error\-codes below is 
+returned. 
+.PP
+.SH THREAD AND SIGNAL SAFETY
+
+.PP
+unw_set_fpreg()
+is thread\-safe as well as safe to use 
+from a signal handler. 
+.PP
+.SH ERRORS
+
+.PP
+.TP
+UNW_EUNSPEC
+ An unspecified error occurred. 
+.TP
+UNW_EBADREG
+ An attempt was made to write a register 
+that is either invalid or not accessible in the current frame. 
+.TP
+UNW_EREADONLY
+ An attempt was made to write to a 
+read\-only register. 
+.PP
+In addition, unw_set_fpreg()
+may return any error returned by 
+the access_mem(),
+access_reg(),
+and 
+access_fpreg()
+call\-backs (see 
+unw_create_addr_space(3)).
+.PP
+.SH SEE ALSO
+
+.PP
+libunwind(3),
+libunwind\-ia64(3),
+unw_get_fpreg(3),
+unw_is_fpreg(3),
+unw_is_signal_frame(3),
+unw_set_reg(3)
+.PP
+.SH AUTHOR
+
+.PP
+David Mosberger\-Tang
+.br
+Email: \fBdmosberger@gmail.com\fP
+.br
+WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
+.\" NOTE: This file is generated, DO NOT EDIT.
diff --git a/src/third_party/unwind/dist/doc/unw_set_fpreg.tex b/src/third_party/unwind/dist/doc/unw_set_fpreg.tex
new file mode 100644
index 00000000000..aaf7fb25a76
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_set_fpreg.tex
@@ -0,0 +1,79 @@
+\documentclass{article}
+\usepackage[fancyhdr,pdf]{latex2man}
+
+\input{common.tex}
+
+\begin{document}
+
+\begin{Name}{3}{unw\_set\_fpreg}{David Mosberger-Tang}{Programming Library}{unw\_set\_fpreg}unw\_set\_fpreg -- set contents of floating-point register
+\end{Name}
+
+\section{Synopsis}
+
+\File{\#include $<$libunwind.h$>$}\\
+
+\Type{int} \Func{unw\_set\_fpreg}(\Type{unw\_cursor\_t~*}\Var{cp}, \Type{unw\_regnum\_t} \Var{reg}, \Type{unw\_fpreg\_t} \Var{val});\\
+
+\section{Description}
+
+The \Func{unw\_set\_fpreg}() routine sets the value of register
+\Var{reg} in the stack frame identified by cursor \Var{cp} to the
+value passed in \Var{val}.
+
+The register numbering is target-dependent and described in separate
+manual pages (e.g., libunwind-ia64(3) for the IA-64 target).
+Furthermore, the exact set of accessible registers may depend on the
+type of frame that \Var{cp} is referring to.  For ordinary stack
+frames, it is normally possible to access only the preserved
+(``callee-saved'') registers and frame-related registers (such as the
+stack-pointer).  However, for signal frames (see
+\Func{unw\_is\_signal\_frame}(3)), it is usually possible to access
+all registers.
+
+Note that \Func{unw\_set\_fpreg}() can only write the contents of
+floating-point registers.  See \Func{unw\_set\_reg}(3) for a way to
+write registers which fit in a single word.
+
+\section{Return Value}
+
+On successful completion, \Func{unw\_set\_fpreg}() returns 0.
+Otherwise the negative value of one of the error-codes below is
+returned.
+
+\section{Thread and Signal Safety}
+
+\Func{unw\_set\_fpreg}() is thread-safe as well as safe to use
+from a signal handler.
+
+\section{Errors}
+
+\begin{Description}
+\item[\Const{UNW\_EUNSPEC}] An unspecified error occurred.
+\item[\Const{UNW\_EBADREG}] An attempt was made to write a register
+  that is either invalid or not accessible in the current frame.
+\item[\Const{UNW\_EREADONLY}] An attempt was made to write to a
+  read-only register.
+\end{Description}
+In addition, \Func{unw\_set\_fpreg}() may return any error returned by
+the \Func{access\_mem}(), \Func{access\_reg}(), and
+\Func{access\_fpreg}() call-backs (see
+\Func{unw\_create\_addr\_space}(3)).
+
+\section{See Also}
+
+\SeeAlso{libunwind(3)},
+\SeeAlso{libunwind-ia64(3)},
+\SeeAlso{unw\_get\_fpreg(3)},
+\SeeAlso{unw\_is\_fpreg(3)},
+\SeeAlso{unw\_is\_signal\_frame(3)},
+\SeeAlso{unw\_set\_reg(3)}
+
+\section{Author}
+
+\noindent
+David Mosberger-Tang\\
+Email: \Email{dmosberger@gmail.com}\\
+WWW: \URL{http://www.nongnu.org/libunwind/}.
+\LatexManEnd
+
+\end{document}
diff --git a/src/third_party/unwind/dist/doc/unw_set_reg.man b/src/third_party/unwind/dist/doc/unw_set_reg.man
new file mode 100644
index 00000000000..5d57045f747
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_set_reg.man
@@ -0,0 +1,117 @@
+'\" t
+.\" Manual page created with latex2man on Thu Aug 16 09:44:45 MDT 2007
+.\" NOTE: This file is generated, DO NOT EDIT.
+.de Vb
+.ft CW
+.nf
+..
+.de Ve
+.ft R
+
+.fi
+..
+.TH "UNW\\_SET\\_REG" "3" "16 August 2007" "Programming Library " "Programming Library "
+.SH NAME
+unw_set_reg
+\-\- set register contents 
+.PP
+.SH SYNOPSIS
+
+.PP
+#include <libunwind.h>
+.br
+.PP
+int
+unw_set_reg(unw_cursor_t *cp,
+unw_regnum_t
+reg,
+unw_word_t
+val);
+.br
+.PP
+.SH DESCRIPTION
+
+.PP
+The unw_set_reg()
+routine sets the value of register 
+reg
+in the stack frame identified by cursor cp
+to the 
+value passed in val\&.
+.PP
+The register numbering is target\-dependent and described in separate 
+manual pages (e.g., libunwind\-ia64(3) for the IA\-64 target). 
+Furthermore, the exact set of accessible registers may depend on the 
+type of frame that cp
+is referring to. For ordinary stack 
+frames, it is normally possible to access only the preserved 
+(``callee\-saved\&'') registers and frame\-related registers (such as the 
+stack\-pointer). However, for signal frames (see 
+unw_is_signal_frame(3)),
+it is usually possible to access 
+all registers. 
+.PP
+Note that unw_set_reg()
+can only write the contents of 
+registers whose values fit in a single word. See 
+unw_set_fpreg(3)
+for a way to write registers which do not 
+fit this constraint. 
+.PP
+.SH RETURN VALUE
+
+.PP
+On successful completion, unw_set_reg()
+returns 0. 
+Otherwise the negative value of one of the error\-codes below is 
+returned. 
+.PP
+.SH THREAD AND SIGNAL SAFETY
+
+.PP
+unw_set_reg()
+is thread\-safe as well as safe to use 
+from a signal handler. 
+.PP
+.SH ERRORS
+
+.PP
+.TP
+UNW_EUNSPEC
+ An unspecified error occurred. 
+.TP
+UNW_EBADREG
+ An attempt was made to write a register 
+that is either invalid or not accessible in the current frame. 
+.TP
+UNW_EREADONLY
+ An attempt was made to write to a 
+read\-only register. 
+.PP
+In addition, unw_set_reg()
+may return any error returned by 
+the access_mem(),
+access_reg(),
+and 
+access_fpreg()
+call\-backs (see 
+unw_create_addr_space(3)).
+.PP
+.SH SEE ALSO
+
+.PP
+libunwind(3),
+libunwind\-ia64(3),
+unw_get_reg(3),
+unw_is_signal_frame(3),
+unw_set_fpreg(3)
+.PP
+.SH AUTHOR
+
+.PP
+David Mosberger\-Tang
+.br
+Email: \fBdmosberger@gmail.com\fP
+.br
+WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
+.\" NOTE: This file is generated, DO NOT EDIT.
diff --git a/src/third_party/unwind/dist/doc/unw_set_reg.tex b/src/third_party/unwind/dist/doc/unw_set_reg.tex
new file mode 100644
index 00000000000..2421846be59
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_set_reg.tex
@@ -0,0 +1,79 @@
+\documentclass{article}
+\usepackage[fancyhdr,pdf]{latex2man}
+
+\input{common.tex}
+
+\begin{document}
+
+\begin{Name}{3}{unw\_set\_reg}{David Mosberger-Tang}{Programming Library}{unw\_set\_reg}unw\_set\_reg -- set register contents
+\end{Name}
+
+\section{Synopsis}
+
+\File{\#include $<$libunwind.h$>$}\\
+
+\Type{int} \Func{unw\_set\_reg}(\Type{unw\_cursor\_t~*}\Var{cp}, \Type{unw\_regnum\_t} \Var{reg}, \Type{unw\_word\_t} \Var{val});\\
+
+\section{Description}
+
+The \Func{unw\_set\_reg}() routine sets the value of register
+\Var{reg} in the stack frame identified by cursor \Var{cp} to the
+value passed in \Var{val}.
+
+The register numbering is target-dependent and described in separate
+manual pages (e.g., libunwind-ia64(3) for the IA-64 target).
+Furthermore, the exact set of accessible registers may depend on the
+type of frame that \Var{cp} is referring to.  For ordinary stack
+frames, it is normally possible to access only the preserved
+(``callee-saved'') registers and frame-related registers (such as the
+stack-pointer).  However, for signal frames (see
+\Func{unw\_is\_signal\_frame}(3)), it is usually possible to access
+all registers.
+
+Note that \Func{unw\_set\_reg}() can only write the contents of
+registers whose values fit in a single word.  See
+\Func{unw\_set\_fpreg}(3) for a way to write registers which do not
+fit this constraint.
+
+\section{Return Value}
+
+On successful completion, \Func{unw\_set\_reg}() returns 0.
+Otherwise the negative value of one of the error-codes below is
+returned.
+
+\section{Thread and Signal Safety}
+
+\Func{unw\_set\_reg}() is thread-safe as well as safe to use
+from a signal handler.
+
+\section{Errors}
+
+\begin{Description}
+\item[\Const{UNW\_EUNSPEC}] An unspecified error occurred.
+\item[\Const{UNW\_EBADREG}] An attempt was made to write a register
+  that is either invalid or not accessible in the current frame.
+\item[\Const{UNW\_EREADONLY}] An attempt was made to write to a
+  read-only register.
+\end{Description}
+In addition, \Func{unw\_set\_reg}() may return any error returned by
+the \Func{access\_mem}(), \Func{access\_reg}(), and
+\Func{access\_fpreg}() call-backs (see
+\Func{unw\_create\_addr\_space}(3)).
+
+\section{See Also}
+
+\SeeAlso{libunwind(3)},
+\SeeAlso{libunwind-ia64(3)},
+\SeeAlso{unw\_get\_reg(3)},
+\SeeAlso{unw\_is\_signal\_frame(3)},
+\SeeAlso{unw\_set\_fpreg(3)}
+
+\section{Author}
+
+\noindent
+David Mosberger-Tang\\
+Email: \Email{dmosberger@gmail.com}\\
+WWW: \URL{http://www.nongnu.org/libunwind/}.
+\LatexManEnd
+
+\end{document}
diff --git a/src/third_party/unwind/dist/doc/unw_step.man b/src/third_party/unwind/dist/doc/unw_step.man
new file mode 100644
index 00000000000..96835cf0dfa
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_step.man
@@ -0,0 +1,108 @@
+.\" *********************************** start of \input{common.tex}
+.\" *********************************** end of \input{common.tex}
+'\" t
+.\" Manual page created with latex2man on Sat Apr 20 19:14:02 EDT 2019
+.\" NOTE: This file is generated, DO NOT EDIT.
+.de Vb
+.ft CW
+.nf
+..
+.de Ve
+.ft R
+
+.fi
+..
+.TH "UNW\\_STEP" "3" "20 April 2019" "Programming Library " "Programming Library "
+.SH NAME
+unw_step
+\-\- advance to next stack frame 
+.PP
+.SH SYNOPSIS
+
+.PP
+#include <libunwind.h>
+.br
+.PP
+int
+unw_step(unw_cursor_t *cp);
+.br
+.PP
+.SH DESCRIPTION
+
+.PP
+The unw_step()
+routine advances the unwind cursor cp
+to 
+the next older, less deeply nested stack frame. 
+.PP
+.SH RETURN VALUE
+
+.PP
+On successful completion, unw_step()
+returns a positive value 
+if the updated cursor refers to a valid stack frame, or 0 if the 
+previous stack frame was the last frame in the chain. On error, the 
+negative value of one of the error\-codes below is returned. 
+.PP
+.SH THREAD AND SIGNAL SAFETY
+
+.PP
+unw_step()
+is thread\-safe. If cursor cp
+is in the local 
+address\-space, this routine is also safe to use from a signal handler. 
+.PP
+.SH ERRORS
+
+.PP
+.TP
+UNW_EUNSPEC
+ An unspecified error occurred. 
+.TP
+UNW_ENOINFO
+ Libunwind
+was unable to locate the 
+unwind\-info needed to complete the operation. 
+.TP
+UNW_EBADVERSION
+ The unwind\-info needed to complete the 
+operation has a version or a format that is not understood by 
+libunwind\&.
+.TP
+UNW_EINVALIDIP
+ The instruction\-pointer 
+(``program\-counter\&'') of the next stack frame is invalid (e.g., not 
+properly aligned). 
+.TP
+UNW_EBADFRAME
+ The next stack frame is invalid. 
+.TP
+UNW_ESTOPUNWIND
+ Returned if a call to 
+find_proc_info()
+returned \-UNW_ESTOPUNWIND\&.
+.PP
+In addition, unw_step()
+may return any error returned by the 
+find_proc_info(),
+get_dyn_info_list_addr(),
+access_mem(),
+access_reg(),
+or access_fpreg()
+call\-backs (see unw_create_addr_space(3)).
+.PP
+.SH SEE ALSO
+
+.PP
+libunwind(3),
+unw_create_addr_space(3)
+.PP
+.SH AUTHOR
+
+.PP
+David Mosberger\-Tang
+.br
+Email: \fBdmosberger@gmail.com\fP
+.br
+WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
+.\" NOTE: This file is generated, DO NOT EDIT.
diff --git a/src/third_party/unwind/dist/doc/unw_step.tex b/src/third_party/unwind/dist/doc/unw_step.tex
new file mode 100644
index 00000000000..106bd9ba99c
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_step.tex
@@ -0,0 +1,68 @@
+\documentclass{article}
+\usepackage[fancyhdr,pdf]{latex2man}
+
+\input{common.tex}
+
+\begin{document}
+
+\begin{Name}{3}{unw\_step}{David Mosberger-Tang}{Programming Library}{unw\_step}unw\_step -- advance to next stack frame
+\end{Name}
+
+\section{Synopsis}
+
+\File{\#include $<$libunwind.h$>$}\\
+
+\Type{int} \Func{unw\_step}(\Type{unw\_cursor\_t~*}\Var{cp});\\
+
+\section{Description}
+
+The \Func{unw\_step}() routine advances the unwind cursor \Var{cp} to
+the next older, less deeply nested stack frame.
+
+\section{Return Value}
+
+On successful completion, \Func{unw\_step}() returns a positive value
+if the updated cursor refers to a valid stack frame, or 0 if the
+previous stack frame was the last frame in the chain.  On error, the
+negative value of one of the error-codes below is returned.
+
+\section{Thread and Signal Safety}
+
+\Func{unw\_step}() is thread-safe.  If cursor \Var{cp} is in the local
+address-space, this routine is also safe to use from a signal handler.
+
+\section{Errors}
+
+\begin{Description}
+\item[\Const{UNW\_EUNSPEC}] An unspecified error occurred.
+\item[\Const{UNW\_ENOINFO}] \Prog{Libunwind} was unable to locate the
+  unwind-info needed to complete the operation.
+\item[\Const{UNW\_EBADVERSION}] The unwind-info needed to complete the
+  operation has a version or a format that is not understood by
+  \Prog{libunwind}.
+\item[\Const{UNW\_EINVALIDIP}] The instruction-pointer
+  (``program-counter'') of the next stack frame is invalid (e.g., not
+  properly aligned).
+\item[\Const{UNW\_EBADFRAME}] The next stack frame is invalid.
+\item[\Const{UNW\_ESTOPUNWIND}] Returned if a call to
+  \Func{find\_proc\_info}() returned -\Const{UNW\_ESTOPUNWIND}.
+\end{Description}
+In addition, \Func{unw\_step}() may return any error returned by the
+\Func{find\_proc\_info}(), \Func{get\_dyn\_info\_list\_addr}(),
+\Func{access\_mem}(), \Func{access\_reg}(), or \Func{access\_fpreg}()
+call-backs (see \Func{unw\_create\_addr\_space}(3)).
+
+\section{See Also}
+
+\SeeAlso{libunwind(3)},
+\SeeAlso{unw\_create\_addr\_space(3)}
+
+\section{Author}
+
+\noindent
+David Mosberger-Tang\\
+Email: \Email{dmosberger@gmail.com}\\
+WWW: \URL{http://www.nongnu.org/libunwind/}.
+\LatexManEnd
+
+\end{document}
diff --git a/src/third_party/unwind/dist/doc/unw_strerror.man b/src/third_party/unwind/dist/doc/unw_strerror.man
new file mode 100644
index 00000000000..467c44d2620
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_strerror.man
@@ -0,0 +1,63 @@
+'\" t
+.\" Manual page created with latex2man on Wed Aug 18 16:51:29 CEST 2004
+.\" NOTE: This file is generated, DO NOT EDIT.
+.de Vb
+.ft CW
+.nf
+..
+.de Ve
+.ft R
+
+.fi
+..
+.TH "UNW\\_STRERROR" "3" "18 August 2004" "Programming Library " "Programming Library "
+.SH NAME
+unw_strerror
+\-\- get text corresponding to error code 
+.PP
+.SH SYNOPSIS
+
+.PP
+#include <libunwind.h>
+.br
+.PP
+const char *
+unw_strerror(int
+err_code);
+.br
+.PP
+.SH DESCRIPTION
+
+.PP
+The unw_strerror()
+routine maps the (negative) err_code
+to a corresponding text message and returns it. 
+.PP
+.SH RETURN VALUE
+
+.PP
+The message that corresponds to err_code
+or, if the 
+err_code
+has no corresponding message, the text "invalid error 
+code". 
+.PP
+.SH THREAD AND SIGNAL SAFETY
+
+.PP
+unw_strerror()
+is thread\-safe as well as safe to use 
+from a signal handler. 
+.PP
+.SH AUTHOR
+
+.PP
+Thomas Hallgren
+.br 
+BEA Systems
+.br 
+Stockholm, Sweden
+.br 
+Email: \fBthallgre@bea.com\fP
+.br
+.\" NOTE: This file is generated, DO NOT EDIT.
diff --git a/src/third_party/unwind/dist/doc/unw_strerror.tex b/src/third_party/unwind/dist/doc/unw_strerror.tex
new file mode 100644
index 00000000000..7cad011768d
--- /dev/null
+++ b/src/third_party/unwind/dist/doc/unw_strerror.tex
@@ -0,0 +1,42 @@
+\documentclass{article}
+\usepackage[fancyhdr,pdf]{latex2man}
+
+\input{common.tex}
+
+\begin{document}
+
+\begin{Name}{3}{unw\_strerror}{Thomas Hallgren}{Programming Library}{unw\_strerror}unw\_strerror -- get text corresponding to error code
+\end{Name}
+
+\section{Synopsis}
+
+\File{\#include $<$libunwind.h$>$}\\
+
+\Type{const char *} \Func{unw\_strerror}(\Type{int} \Var{err\_code});\\
+
+\section{Description}
+
+The \Func{unw\_strerror}() routine maps the (negative) \Var{err\_code}
+to a corresponding text message and returns it.
+
+\section{Return Value}
+
+The message that corresponds to \Var{err\_code} or, if the
+\Var{err\_code} has no corresponding message, the text "invalid error
+code".
+
+\section{Thread and Signal Safety}
+
+\Func{unw\_strerror}() is thread-safe as well as safe to use
+from a signal handler.
+
+\section{Author}
+
+\noindent
+Thomas Hallgren\\
+BEA Systems\\
+Stockholm, Sweden\\
+Email: \Email{thallgre@bea.com}\\
+\LatexManEnd
+
+\end{document}
diff --git a/src/third_party/unwind/dist/include/compiler.h b/src/third_party/unwind/dist/include/compiler.h
new file mode 100644
index 00000000000..2fa59eff7fb
--- /dev/null
+++ b/src/third_party/unwind/dist/include/compiler.h
@@ -0,0 +1,72 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2005 Hewlett-Packard Co
+   Copyright (C) 2007 David Mosberger-Tang
+        Contributed by David Mosberger-Tang <dmosberger@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* Compiler specific useful bits that are used in libunwind, and also in the
+ * tests. */
+
+#ifndef COMPILER_H
+#define COMPILER_H
+
+#ifdef __GNUC__
+# define ALIGNED(x)     __attribute__((aligned(x)))
+# define CONST_ATTR     __attribute__((__const__))
+# define UNUSED         __attribute__((unused))
+# define NOINLINE       __attribute__((noinline))
+# define NORETURN       __attribute__((noreturn))
+# define ALIAS2(name)   #name
+# define ALIAS(name)    __attribute__((alias (ALIAS2(name))))
+# if (__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ > 2)
+#  define ALWAYS_INLINE inline __attribute__((always_inline))
+#  define HIDDEN        __attribute__((visibility ("hidden")))
+# else
+#  define ALWAYS_INLINE
+#  define HIDDEN
+# endif
+# define WEAK           __attribute__((weak))
+# if (__GNUC__ >= 3)
+#  define likely(x)     __builtin_expect ((x), 1)
+#  define unlikely(x)   __builtin_expect ((x), 0)
+# else
+#  define likely(x)     (x)
+#  define unlikely(x)   (x)
+# endif
+#else
+# define ALIGNED(x)
+# define ALWAYS_INLINE
+# define CONST_ATTR
+# define UNUSED
+# define NOINLINE
+# define NORETURN
+# define ALIAS(name)
+# define HIDDEN
+# define WEAK
+# define likely(x)      (x)
+# define unlikely(x)    (x)
+#endif
+
+#define ARRAY_SIZE(a)   (sizeof (a) / sizeof ((a)[0]))
+
+#endif /* COMPILER_H */
diff --git a/src/third_party/unwind/dist/include/config.h.in b/src/third_party/unwind/dist/include/config.h.in
new file mode 100644
index 00000000000..98efb22ecf4
--- /dev/null
+++ b/src/third_party/unwind/dist/include/config.h.in
@@ -0,0 +1,234 @@
+/* include/config.h.in.  Generated from configure.ac by autoheader.  */
+
+/* Block signals before mutex operations */
+#undef CONFIG_BLOCK_SIGNALS
+
+/* Enable Debug Frame */
+#undef CONFIG_DEBUG_FRAME
+
+/* Support for Microsoft ABI extensions */
+#undef CONFIG_MSABI_SUPPORT
+
+/* Define to 1 if you want every memory access validated */
+#undef CONSERVATIVE_CHECKS
+
+/* Define to 1 if you have the <asm/ptrace_offsets.h> header file. */
+#undef HAVE_ASM_PTRACE_OFFSETS_H
+
+/* Define to 1 if you have the <atomic_ops.h> header file. */
+#undef HAVE_ATOMIC_OPS_H
+
+/* Define to 1 if you have the <byteswap.h> header file. */
+#undef HAVE_BYTESWAP_H
+
+/* Define to 1 if you have the declaration of `PTRACE_CONT', and to 0 if you
+   don't. */
+#undef HAVE_DECL_PTRACE_CONT
+
+/* Define to 1 if you have the declaration of `PTRACE_POKEDATA', and to 0 if
+   you don't. */
+#undef HAVE_DECL_PTRACE_POKEDATA
+
+/* Define to 1 if you have the declaration of `PTRACE_POKEUSER', and to 0 if
+   you don't. */
+#undef HAVE_DECL_PTRACE_POKEUSER
+
+/* Define to 1 if you have the declaration of `PTRACE_SETREGSET', and to 0 if
+   you don't. */
+#undef HAVE_DECL_PTRACE_SETREGSET
+
+/* Define to 1 if you have the declaration of `PTRACE_SINGLESTEP', and to 0 if
+   you don't. */
+#undef HAVE_DECL_PTRACE_SINGLESTEP
+
+/* Define to 1 if you have the declaration of `PTRACE_SYSCALL', and to 0 if
+   you don't. */
+#undef HAVE_DECL_PTRACE_SYSCALL
+
+/* Define to 1 if you have the declaration of `PTRACE_TRACEME', and to 0 if
+   you don't. */
+#undef HAVE_DECL_PTRACE_TRACEME
+
+/* Define to 1 if you have the declaration of `PT_CONTINUE', and to 0 if you
+   don't. */
+#undef HAVE_DECL_PT_CONTINUE
+
+/* Define to 1 if you have the declaration of `PT_GETFPREGS', and to 0 if you
+   don't. */
+#undef HAVE_DECL_PT_GETFPREGS
+
+/* Define to 1 if you have the declaration of `PT_GETREGS', and to 0 if you
+   don't. */
+#undef HAVE_DECL_PT_GETREGS
+
+/* Define to 1 if you have the declaration of `PT_IO', and to 0 if you don't.
+   */
+#undef HAVE_DECL_PT_IO
+
+/* Define to 1 if you have the declaration of `PT_STEP', and to 0 if you
+   don't. */
+#undef HAVE_DECL_PT_STEP
+
+/* Define to 1 if you have the declaration of `PT_SYSCALL', and to 0 if you
+   don't. */
+#undef HAVE_DECL_PT_SYSCALL
+
+/* Define to 1 if you have the declaration of `PT_TRACE_ME', and to 0 if you
+   don't. */
+#undef HAVE_DECL_PT_TRACE_ME
+
+/* Define to 1 if you have the <dlfcn.h> header file. */
+#undef HAVE_DLFCN_H
+
+/* Define to 1 if you have the `dlmodinfo' function. */
+#undef HAVE_DLMODINFO
+
+/* Define to 1 if you have the `dl_iterate_phdr' function. */
+#undef HAVE_DL_ITERATE_PHDR
+
+/* Define to 1 if you have the `dl_phdr_removals_counter' function. */
+#undef HAVE_DL_PHDR_REMOVALS_COUNTER
+
+/* Define to 1 if you have the <elf.h> header file. */
+#undef HAVE_ELF_H
+
+/* Define to 1 if you have the <endian.h> header file. */
+#undef HAVE_ENDIAN_H
+
+/* Define to 1 if you have the <execinfo.h> header file. */
+#undef HAVE_EXECINFO_H
+
+/* Define to 1 if you have the `getunwind' function. */
+#undef HAVE_GETUNWIND
+
+/* Define to 1 if you have the <ia64intrin.h> header file. */
+#undef HAVE_IA64INTRIN_H
+
+/* Define to 1 if you have the <inttypes.h> header file. */
+#undef HAVE_INTTYPES_H
+
+/* Define to 1 if you have the `uca' library (-luca). */
+#undef HAVE_LIBUCA
+
+/* Define to 1 if you have the <link.h> header file. */
+#undef HAVE_LINK_H
+
+/* Define if you have liblzma */
+#undef HAVE_LZMA
+
+/* Define to 1 if you have the <memory.h> header file. */
+#undef HAVE_MEMORY_H
+
+/* Define to 1 if you have the `mincore' function. */
+#undef HAVE_MINCORE
+
+/* Define to 1 if you have the <signal.h> header file. */
+#undef HAVE_SIGNAL_H
+
+/* Define to 1 if you have the <stdint.h> header file. */
+#undef HAVE_STDINT_H
+
+/* Define to 1 if you have the <stdlib.h> header file. */
+#undef HAVE_STDLIB_H
+
+/* Define to 1 if you have the <strings.h> header file. */
+#undef HAVE_STRINGS_H
+
+/* Define to 1 if you have the <string.h> header file. */
+#undef HAVE_STRING_H
+
+/* Define to 1 if `dlpi_subs' is a member of `struct dl_phdr_info'. */
+#undef HAVE_STRUCT_DL_PHDR_INFO_DLPI_SUBS
+
+/* Define to 1 if the system has the type `struct elf_prstatus'. */
+#undef HAVE_STRUCT_ELF_PRSTATUS
+
+/* Define to 1 if the system has the type `struct prstatus'. */
+#undef HAVE_STRUCT_PRSTATUS
+
+/* Defined if __sync atomics are available */
+#undef HAVE_SYNC_ATOMICS
+
+/* Define to 1 if you have the <sys/elf.h> header file. */
+#undef HAVE_SYS_ELF_H
+
+/* Define to 1 if you have the <sys/endian.h> header file. */
+#undef HAVE_SYS_ENDIAN_H
+
+/* Define to 1 if you have the <sys/link.h> header file. */
+#undef HAVE_SYS_LINK_H
+
+/* Define to 1 if you have the <sys/procfs.h> header file. */
+#undef HAVE_SYS_PROCFS_H
+
+/* Define to 1 if you have the <sys/ptrace.h> header file. */
+#undef HAVE_SYS_PTRACE_H
+
+/* Define to 1 if you have the <sys/stat.h> header file. */
+#undef HAVE_SYS_STAT_H
+
+/* Define to 1 if you have the <sys/types.h> header file. */
+#undef HAVE_SYS_TYPES_H
+
+/* Define to 1 if you have the <sys/uc_access.h> header file. */
+#undef HAVE_SYS_UC_ACCESS_H
+
+/* Define to 1 if you have the `ttrace' function. */
+#undef HAVE_TTRACE
+
+/* Define to 1 if you have the <unistd.h> header file. */
+#undef HAVE_UNISTD_H
+
+/* Defined if __builtin_unreachable() is available */
+#undef HAVE__BUILTIN_UNREACHABLE
+
+/* Defined if __builtin___clear_cache() is available */
+#undef HAVE__BUILTIN___CLEAR_CACHE
+
+/* Define to 1 if __thread keyword is supported by the C compiler. */
+#undef HAVE___THREAD
+
+/* Define to the sub-directory where libtool stores uninstalled libraries. */
+#undef LT_OBJDIR
+
+/* Name of package */
+#undef PACKAGE
+
+/* Define to the address where bug reports for this package should be sent. */
+#undef PACKAGE_BUGREPORT
+
+/* Define to the full name of this package. */
+#undef PACKAGE_NAME
+
+/* Define to the full name and version of this package. */
+#undef PACKAGE_STRING
+
+/* Define to the one symbol short name of this package. */
+#undef PACKAGE_TARNAME
+
+/* Define to the home page for this package. */
+#undef PACKAGE_URL
+
+/* Define to the version of this package. */
+#undef PACKAGE_VERSION
+
+/* The size of `off_t', as computed by sizeof. */
+#undef SIZEOF_OFF_T
+
+/* Define to 1 if you have the ANSI C header files. */
+#undef STDC_HEADERS
+
+/* Version number of package */
+#undef VERSION
+
+/* Define to empty if `const' does not conform to ANSI C. */
+#undef const
+
+/* Define to `__inline__' or `__inline' if that's what the C compiler
+   calls it, or to nothing if 'inline' is not supported under any name.  */
+#ifndef __cplusplus
+#undef inline
+#endif
+
+/* Define to `unsigned int' if <sys/types.h> does not define. */
+#undef size_t
diff --git a/src/third_party/unwind/dist/include/dwarf-eh.h b/src/third_party/unwind/dist/include/dwarf-eh.h
new file mode 100644
index 00000000000..96002a1b9d2
--- /dev/null
+++ b/src/third_party/unwind/dist/include/dwarf-eh.h
@@ -0,0 +1,129 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef dwarf_eh_h
+#define dwarf_eh_h
+
+#include "dwarf.h"
+#include "libunwind_i.h"
+
+/* This header file defines the format of a DWARF exception-header
+   section (.eh_frame_hdr, pointed to by program-header
+   PT_GNU_EH_FRAME).  The exception-header is self-describing in the
+   sense that the format of the addresses contained in it is expressed
+   as a one-byte type-descriptor called a "pointer-encoding" (PE).
+
+   The exception header encodes the address of the .eh_frame section
+   and optionally contains a binary search table for the
+   Frame Descriptor Entries (FDEs) in the .eh_frame.  The contents of
+   .eh_frame has the format described by the DWARF v3 standard
+   (http://www.eagercon.com/dwarf/dwarf3std.htm), except that code
+   addresses may be encoded in different ways.  Also, .eh_frame has
+   augmentations that allow encoding a language-specific data-area
+   (LSDA) pointer and a pointer to a personality-routine.
+
+   Details:
+
+    The Common Information Entry (CIE) associated with an FDE may
+    contain an augmentation string.  Each character in this string has
+    a specific meaning and either one or two associated operands.  The
+    operands are stored in an augmentation body which appears right
+    after the "return_address_register" member and before the
+    "initial_instructions" member.  The operands appear in the order
+    in which the characters appear in the string.  For example, if the
+    augmentation string is "zL", the operand for 'z' would be first in
+    the augmentation body and the operand for 'L' would be second.
+    The following characters are supported for the CIE augmentation
+    string:
+
+     'z': The operand for this character is a uleb128 value that gives the
+          length of the CIE augmentation body, not counting the length
+          of the uleb128 operand itself.  If present, this code must
+          appear as the first character in the augmentation body.
+
+     'L': Indicates that the FDE's augmentation body contains an LSDA
+          pointer.  The operand for this character is a single byte
+          that specifies the pointer-encoding (PE) that is used for
+          the LSDA pointer.
+
+     'R': Indicates that the code-pointers (FDE members
+          "initial_location" and "address_range" and the operand for
+          DW_CFA_set_loc) in the FDE have a non-default encoding.  The
+          operand for this character is a single byte that specifies
+          the pointer-encoding (PE) that is used for the
+          code-pointers.  Note: the "address_range" member is always
+          encoded as an absolute value.  Apart from that, the specified
+          FDE pointer-encoding applies.
+
+     'P': Indicates the presence of a personality routine (handler).
+          The first operand for this character specifies the
+          pointer-encoding (PE) that is used for the second operand,
+          which specifies the address of the personality routine.
+
+    If the augmentation string contains any other characters, the
+    remainder of the augmentation string should be ignored.
+    Furthermore, if the size of the augmentation body is unknown
+    (i.e., 'z' is not the first character of the augmentation string),
+    then the entire CIE as well all associated FDEs must be ignored.
+
+    A Frame Descriptor Entries (FDE) may contain an augmentation body
+    which, if present, appears right after the "address_range" member
+    and before the "instructions" member.  The contents of this body
+    is implicitly defined by the augmentation string of the associated
+    CIE.  The meaning of the characters in the CIE's augmentation
+    string as far as FDEs are concerned is as follows:
+
+     'z': The first operand in the FDE's augmentation body specifies
+          the total length of the augmentation body as a uleb128 (not
+          counting the length of the uleb128 operand itself).
+
+     'L': The operand for this character is an LSDA pointer, encoded
+          in the format specified by the corresponding operand in the
+          CIE's augmentation body.
+
+*/
+
+#define DW_EH_VERSION           1       /* The version we're implementing */
+
+struct __attribute__((packed)) dwarf_eh_frame_hdr
+  {
+    unsigned char version;
+    unsigned char eh_frame_ptr_enc;
+    unsigned char fde_count_enc;
+    unsigned char table_enc;
+    Elf_W (Addr) eh_frame;
+    /* The rest of the header is variable-length and consists of the
+       following members:
+
+        encoded_t fde_count;
+        struct
+          {
+            encoded_t start_ip; // first address covered by this FDE
+            encoded_t fde_addr; // address of the FDE
+          }
+        binary_search_table[fde_count];  */
+  };
+
+#endif /* dwarf_eh_h */
diff --git a/src/third_party/unwind/dist/include/dwarf.h b/src/third_party/unwind/dist/include/dwarf.h
new file mode 100644
index 00000000000..764f6f20ac2
--- /dev/null
+++ b/src/third_party/unwind/dist/include/dwarf.h
@@ -0,0 +1,450 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2003-2005 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef dwarf_h
+#define dwarf_h
+
+#include <libunwind.h>
+
+struct dwarf_cursor;    /* forward-declaration */
+struct elf_dyn_info;
+
+#include "dwarf-config.h"
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#ifndef UNW_REMOTE_ONLY
+  #if defined(HAVE_LINK_H)
+    #include <link.h>
+  #elif defined(HAVE_SYS_LINK_H)
+    #include <sys/link.h>
+  #else
+    #error Could not find <link.h>
+  #endif
+#endif
+
+#include <pthread.h>
+
+/* DWARF expression opcodes.  */
+
+typedef enum
+  {
+    DW_OP_addr                  = 0x03,
+    DW_OP_deref                 = 0x06,
+    DW_OP_const1u               = 0x08,
+    DW_OP_const1s               = 0x09,
+    DW_OP_const2u               = 0x0a,
+    DW_OP_const2s               = 0x0b,
+    DW_OP_const4u               = 0x0c,
+    DW_OP_const4s               = 0x0d,
+    DW_OP_const8u               = 0x0e,
+    DW_OP_const8s               = 0x0f,
+    DW_OP_constu                = 0x10,
+    DW_OP_consts                = 0x11,
+    DW_OP_dup                   = 0x12,
+    DW_OP_drop                  = 0x13,
+    DW_OP_over                  = 0x14,
+    DW_OP_pick                  = 0x15,
+    DW_OP_swap                  = 0x16,
+    DW_OP_rot                   = 0x17,
+    DW_OP_xderef                = 0x18,
+    DW_OP_abs                   = 0x19,
+    DW_OP_and                   = 0x1a,
+    DW_OP_div                   = 0x1b,
+    DW_OP_minus                 = 0x1c,
+    DW_OP_mod                   = 0x1d,
+    DW_OP_mul                   = 0x1e,
+    DW_OP_neg                   = 0x1f,
+    DW_OP_not                   = 0x20,
+    DW_OP_or                    = 0x21,
+    DW_OP_plus                  = 0x22,
+    DW_OP_plus_uconst           = 0x23,
+    DW_OP_shl                   = 0x24,
+    DW_OP_shr                   = 0x25,
+    DW_OP_shra                  = 0x26,
+    DW_OP_xor                   = 0x27,
+    DW_OP_skip                  = 0x2f,
+    DW_OP_bra                   = 0x28,
+    DW_OP_eq                    = 0x29,
+    DW_OP_ge                    = 0x2a,
+    DW_OP_gt                    = 0x2b,
+    DW_OP_le                    = 0x2c,
+    DW_OP_lt                    = 0x2d,
+    DW_OP_ne                    = 0x2e,
+    DW_OP_lit0                  = 0x30,
+    DW_OP_lit1,  DW_OP_lit2,  DW_OP_lit3,  DW_OP_lit4,  DW_OP_lit5,
+    DW_OP_lit6,  DW_OP_lit7,  DW_OP_lit8,  DW_OP_lit9,  DW_OP_lit10,
+    DW_OP_lit11, DW_OP_lit12, DW_OP_lit13, DW_OP_lit14, DW_OP_lit15,
+    DW_OP_lit16, DW_OP_lit17, DW_OP_lit18, DW_OP_lit19, DW_OP_lit20,
+    DW_OP_lit21, DW_OP_lit22, DW_OP_lit23, DW_OP_lit24, DW_OP_lit25,
+    DW_OP_lit26, DW_OP_lit27, DW_OP_lit28, DW_OP_lit29, DW_OP_lit30,
+    DW_OP_lit31,
+    DW_OP_reg0                  = 0x50,
+    DW_OP_reg1,  DW_OP_reg2,  DW_OP_reg3,  DW_OP_reg4,  DW_OP_reg5,
+    DW_OP_reg6,  DW_OP_reg7,  DW_OP_reg8,  DW_OP_reg9,  DW_OP_reg10,
+    DW_OP_reg11, DW_OP_reg12, DW_OP_reg13, DW_OP_reg14, DW_OP_reg15,
+    DW_OP_reg16, DW_OP_reg17, DW_OP_reg18, DW_OP_reg19, DW_OP_reg20,
+    DW_OP_reg21, DW_OP_reg22, DW_OP_reg23, DW_OP_reg24, DW_OP_reg25,
+    DW_OP_reg26, DW_OP_reg27, DW_OP_reg28, DW_OP_reg29, DW_OP_reg30,
+    DW_OP_reg31,
+    DW_OP_breg0                 = 0x70,
+    DW_OP_breg1,  DW_OP_breg2,  DW_OP_breg3,  DW_OP_breg4,  DW_OP_breg5,
+    DW_OP_breg6,  DW_OP_breg7,  DW_OP_breg8,  DW_OP_breg9,  DW_OP_breg10,
+    DW_OP_breg11, DW_OP_breg12, DW_OP_breg13, DW_OP_breg14, DW_OP_breg15,
+    DW_OP_breg16, DW_OP_breg17, DW_OP_breg18, DW_OP_breg19, DW_OP_breg20,
+    DW_OP_breg21, DW_OP_breg22, DW_OP_breg23, DW_OP_breg24, DW_OP_breg25,
+    DW_OP_breg26, DW_OP_breg27, DW_OP_breg28, DW_OP_breg29, DW_OP_breg30,
+    DW_OP_breg31,
+    DW_OP_regx                  = 0x90,
+    DW_OP_fbreg                 = 0x91,
+    DW_OP_bregx                 = 0x92,
+    DW_OP_piece                 = 0x93,
+    DW_OP_deref_size            = 0x94,
+    DW_OP_xderef_size           = 0x95,
+    DW_OP_nop                   = 0x96,
+    DW_OP_push_object_address   = 0x97,
+    DW_OP_call2                 = 0x98,
+    DW_OP_call4                 = 0x99,
+    DW_OP_call_ref              = 0x9a,
+    DW_OP_lo_user               = 0xe0,
+    DW_OP_hi_user               = 0xff
+  }
+dwarf_expr_op_t;
+
+#define DWARF_CIE_VERSION       3
+#define DWARF_CIE_VERSION_MAX   4
+
+#define DWARF_CFA_OPCODE_MASK   0xc0
+#define DWARF_CFA_OPERAND_MASK  0x3f
+
+typedef enum
+  {
+    DW_CFA_advance_loc          = 0x40,
+    DW_CFA_offset               = 0x80,
+    DW_CFA_restore              = 0xc0,
+    DW_CFA_nop                  = 0x00,
+    DW_CFA_set_loc              = 0x01,
+    DW_CFA_advance_loc1         = 0x02,
+    DW_CFA_advance_loc2         = 0x03,
+    DW_CFA_advance_loc4         = 0x04,
+    DW_CFA_offset_extended      = 0x05,
+    DW_CFA_restore_extended     = 0x06,
+    DW_CFA_undefined            = 0x07,
+    DW_CFA_same_value           = 0x08,
+    DW_CFA_register             = 0x09,
+    DW_CFA_remember_state       = 0x0a,
+    DW_CFA_restore_state        = 0x0b,
+    DW_CFA_def_cfa              = 0x0c,
+    DW_CFA_def_cfa_register     = 0x0d,
+    DW_CFA_def_cfa_offset       = 0x0e,
+    DW_CFA_def_cfa_expression   = 0x0f,
+    DW_CFA_expression           = 0x10,
+    DW_CFA_offset_extended_sf   = 0x11,
+    DW_CFA_def_cfa_sf           = 0x12,
+    DW_CFA_def_cfa_offset_sf    = 0x13,
+    DW_CFA_val_expression       = 0x16,
+    DW_CFA_lo_user              = 0x1c,
+    DW_CFA_MIPS_advance_loc8    = 0x1d,
+    DW_CFA_GNU_window_save      = 0x2d,
+    DW_CFA_GNU_args_size        = 0x2e,
+    DW_CFA_GNU_negative_offset_extended = 0x2f,
+    DW_CFA_hi_user              = 0x3c
+  }
+dwarf_cfa_t;
+
+/* DWARF Pointer-Encoding (PEs).
+
+   Pointer-Encodings were invented for the GCC exception-handling
+   support for C++, but they represent a rather generic way of
+   describing the format in which an address/pointer is stored and
+   hence we include the definitions here, in the main dwarf.h file.
+   The Pointer-Encoding format is partially documented in Linux Base
+   Spec v1.3 (http://www.linuxbase.org/spec/).  The rest is reverse
+   engineered from GCC.
+
+*/
+#define DW_EH_PE_FORMAT_MASK    0x0f    /* format of the encoded value */
+#define DW_EH_PE_APPL_MASK      0x70    /* how the value is to be applied */
+/* Flag bit.  If set, the resulting pointer is the address of the word
+   that contains the final address.  */
+#define DW_EH_PE_indirect       0x80
+
+/* Pointer-encoding formats: */
+#define DW_EH_PE_omit           0xff
+#define DW_EH_PE_ptr            0x00    /* pointer-sized unsigned value */
+#define DW_EH_PE_uleb128        0x01    /* unsigned LE base-128 value */
+#define DW_EH_PE_udata2         0x02    /* unsigned 16-bit value */
+#define DW_EH_PE_udata4         0x03    /* unsigned 32-bit value */
+#define DW_EH_PE_udata8         0x04    /* unsigned 64-bit value */
+#define DW_EH_PE_sleb128        0x09    /* signed LE base-128 value */
+#define DW_EH_PE_sdata2         0x0a    /* signed 16-bit value */
+#define DW_EH_PE_sdata4         0x0b    /* signed 32-bit value */
+#define DW_EH_PE_sdata8         0x0c    /* signed 64-bit value */
+
+/* Pointer-encoding application: */
+#define DW_EH_PE_absptr         0x00    /* absolute value */
+#define DW_EH_PE_pcrel          0x10    /* rel. to addr. of encoded value */
+#define DW_EH_PE_textrel        0x20    /* text-relative (GCC-specific???) */
+#define DW_EH_PE_datarel        0x30    /* data-relative */
+/* The following are not documented by LSB v1.3, yet they are used by
+   GCC, presumably they aren't documented by LSB since they aren't
+   used on Linux:  */
+#define DW_EH_PE_funcrel        0x40    /* start-of-procedure-relative */
+#define DW_EH_PE_aligned        0x50    /* aligned pointer */
+
+extern struct mempool dwarf_reg_state_pool;
+extern struct mempool dwarf_cie_info_pool;
+
+typedef enum
+  {
+    DWARF_WHERE_UNDEF,          /* register isn't saved at all */
+    DWARF_WHERE_SAME,           /* register has same value as in prev. frame */
+    DWARF_WHERE_CFAREL,         /* register saved at CFA-relative address */
+    DWARF_WHERE_REG,            /* register saved in another register */
+    DWARF_WHERE_EXPR,           /* register saved */
+    DWARF_WHERE_VAL_EXPR,       /* register has computed value */
+  }
+dwarf_where_t;
+
+/* For uniformity, we'd like to treat the CFA save-location like any
+   other register save-location, but this doesn't quite work, because
+   the CFA can be expressed as a (REGISTER,OFFSET) pair.  To handle
+   this, we use two dwarf_save_loc structures to describe the CFA.
+   The first one (CFA_REG_COLUMN), tells us where the CFA is saved.
+   In the case of DWARF_WHERE_EXPR, the CFA is defined by a DWARF
+   location expression whose address is given by member "val".  In the
+   case of DWARF_WHERE_REG, member "val" gives the number of the
+   base-register and the "val" member of DWARF_CFA_OFF_COLUMN gives
+   the offset value.  */
+#define DWARF_CFA_REG_COLUMN    DWARF_NUM_PRESERVED_REGS
+#define DWARF_CFA_OFF_COLUMN    (DWARF_NUM_PRESERVED_REGS + 1)
+
+typedef struct dwarf_reg_only_state
+  {
+    char where[DWARF_NUM_PRESERVED_REGS + 2];        /* how is the register saved? */
+    unw_word_t val[DWARF_NUM_PRESERVED_REGS + 2];             /* where it's saved */
+  }
+dwarf_reg_only_state_t;
+
+typedef struct dwarf_reg_state
+  {
+    unw_word_t ret_addr_column;	/* which column in rule table represents return address */
+    dwarf_reg_only_state_t reg;
+  }
+dwarf_reg_state_t;
+
+typedef struct dwarf_stackable_reg_state
+  {
+    struct dwarf_stackable_reg_state *next;       /* for rs_stack */
+    dwarf_reg_state_t state;
+  }
+dwarf_stackable_reg_state_t;
+
+typedef struct dwarf_reg_cache_entry
+  {
+    unw_word_t ip;                        /* ip this rs is for */
+    unsigned short coll_chain;  /* used for hash collisions */
+    unsigned short hint;              /* hint for next rs to try (or -1) */
+    unsigned short valid : 1;         /* optional machine-dependent signal info */
+    unsigned short signal_frame : 1;  /* optional machine-dependent signal info */
+  }
+dwarf_reg_cache_entry_t;
+
+typedef struct dwarf_cie_info
+  {
+    unw_word_t cie_instr_start; /* start addr. of CIE "initial_instructions" */
+    unw_word_t cie_instr_end;   /* end addr. of CIE "initial_instructions" */
+    unw_word_t fde_instr_start; /* start addr. of FDE "instructions" */
+    unw_word_t fde_instr_end;   /* end addr. of FDE "instructions" */
+    unw_word_t code_align;      /* code-alignment factor */
+    unw_word_t data_align;      /* data-alignment factor */
+    unw_word_t ret_addr_column; /* column of return-address register */
+    unw_word_t handler;         /* address of personality-routine */
+    uint16_t abi;
+    uint16_t tag;
+    uint8_t fde_encoding;
+    uint8_t lsda_encoding;
+    unsigned int sized_augmentation : 1;
+    unsigned int have_abi_marker : 1;
+    unsigned int signal_frame : 1;
+  }
+dwarf_cie_info_t;
+
+typedef struct dwarf_state_record
+  {
+    unsigned char fde_encoding;
+    unw_word_t args_size;
+
+    dwarf_reg_state_t rs_initial;       /* reg-state after CIE instructions */
+    dwarf_reg_state_t rs_current;       /* current reg-state */
+  }
+dwarf_state_record_t;
+
+typedef struct dwarf_cursor
+  {
+    void *as_arg;               /* argument to address-space callbacks */
+    unw_addr_space_t as;        /* reference to per-address-space info */
+
+    unw_word_t cfa;     /* canonical frame address; aka frame-/stack-pointer */
+    unw_word_t ip;              /* instruction pointer */
+    unw_word_t args_size;       /* size of arguments */
+    unw_word_t eh_args[UNW_TDEP_NUM_EH_REGS];
+    unsigned int eh_valid_mask;
+
+    dwarf_loc_t loc[DWARF_NUM_PRESERVED_REGS];
+
+    unsigned int stash_frames :1; /* stash frames for fast lookup */
+    unsigned int use_prev_instr :1; /* use previous (= call) or current (= signal) instruction? */
+    unsigned int pi_valid :1;   /* is proc_info valid? */
+    unsigned int pi_is_dynamic :1; /* proc_info found via dynamic proc info? */
+    unw_proc_info_t pi;         /* info about current procedure */
+
+    short hint; /* faster lookup of the rs cache */
+    short prev_rs;
+  }
+dwarf_cursor_t;
+
+#define DWARF_DEFAULT_LOG_UNW_CACHE_SIZE        7
+#define DWARF_DEFAULT_UNW_CACHE_SIZE    (1 << DWARF_DEFAULT_LOG_UNW_CACHE_SIZE)
+
+#define DWARF_DEFAULT_LOG_UNW_HASH_SIZE (DWARF_DEFAULT_LOG_UNW_CACHE_SIZE + 1)
+#define DWARF_DEFAULT_UNW_HASH_SIZE     (1 << DWARF_DEFAULT_LOG_UNW_HASH_SIZE)
+
+typedef unsigned char unw_hash_index_t;
+
+struct dwarf_rs_cache
+  {
+    pthread_mutex_t lock;
+    unsigned short rr_head;    /* index of least-recently allocated rs */
+
+    unsigned short log_size;
+    unsigned short prev_log_size;
+
+    /* hash table that maps instruction pointer to rs index: */
+    unsigned short *hash;
+
+    uint32_t generation;        /* generation number */
+
+    /* rs cache: */
+    dwarf_reg_state_t *buckets;
+    dwarf_reg_cache_entry_t *links;
+
+    /* default memory, loaded in BSS segment */
+    unsigned short default_hash[DWARF_DEFAULT_UNW_HASH_SIZE];
+    dwarf_reg_state_t default_buckets[DWARF_DEFAULT_UNW_CACHE_SIZE];
+    dwarf_reg_cache_entry_t default_links[DWARF_DEFAULT_UNW_CACHE_SIZE];
+  };
+
+/* A list of descriptors for loaded .debug_frame sections.  */
+
+struct unw_debug_frame_list
+  {
+    /* The start (inclusive) and end (exclusive) of the described region.  */
+    unw_word_t start;
+    unw_word_t end;
+    /* The debug frame itself.  */
+    char *debug_frame;
+    size_t debug_frame_size;
+    /* Index (for binary search).  */
+    struct table_entry *index;
+    size_t index_size;
+    /* Pointer to next descriptor.  */
+    struct unw_debug_frame_list *next;
+  };
+
+/* Convenience macros: */
+#define dwarf_init                      UNW_ARCH_OBJ (dwarf_init)
+#define dwarf_callback                  UNW_OBJ (dwarf_callback)
+#define dwarf_find_proc_info            UNW_OBJ (dwarf_find_proc_info)
+#define dwarf_find_debug_frame          UNW_OBJ (dwarf_find_debug_frame)
+#define dwarf_search_unwind_table       UNW_OBJ (dwarf_search_unwind_table)
+#define dwarf_find_unwind_table         UNW_OBJ (dwarf_find_unwind_table)
+#define dwarf_put_unwind_info           UNW_OBJ (dwarf_put_unwind_info)
+#define dwarf_put_unwind_info           UNW_OBJ (dwarf_put_unwind_info)
+#define dwarf_eval_expr                 UNW_OBJ (dwarf_eval_expr)
+#define dwarf_stack_aligned             UNW_OBJ (dwarf_stack_aligned)
+#define dwarf_extract_proc_info_from_fde \
+                UNW_OBJ (dwarf_extract_proc_info_from_fde)
+#define dwarf_find_save_locs            UNW_OBJ (dwarf_find_save_locs)
+#define dwarf_make_proc_info            UNW_OBJ (dwarf_make_proc_info)
+#define dwarf_apply_reg_state           UNW_OBJ (dwarf_apply_reg_state)
+#define dwarf_reg_states_iterate        UNW_OBJ (dwarf_reg_states_iterate)
+#define dwarf_read_encoded_pointer      UNW_OBJ (dwarf_read_encoded_pointer)
+#define dwarf_step                      UNW_OBJ (dwarf_step)
+#define dwarf_flush_rs_cache            UNW_OBJ (dwarf_flush_rs_cache)
+
+extern int dwarf_init (void);
+#ifndef UNW_REMOTE_ONLY
+extern int dwarf_callback (struct dl_phdr_info *info, size_t size, void *ptr);
+extern int dwarf_find_proc_info (unw_addr_space_t as, unw_word_t ip,
+                                 unw_proc_info_t *pi,
+                                 int need_unwind_info, void *arg);
+#endif /* !UNW_REMOTE_ONLY */
+extern int dwarf_find_debug_frame (int found, unw_dyn_info_t *di_debug,
+                                   unw_word_t ip, unw_word_t segbase,
+                                   const char* obj_name, unw_word_t start,
+                                   unw_word_t end);
+extern int dwarf_search_unwind_table (unw_addr_space_t as,
+                                      unw_word_t ip,
+                                      unw_dyn_info_t *di,
+                                      unw_proc_info_t *pi,
+                                      int need_unwind_info, void *arg);
+
+extern int dwarf_find_unwind_table (struct elf_dyn_info *edi, unw_addr_space_t as,
+                                    char *path, unw_word_t segbase, unw_word_t mapoff,
+                                    unw_word_t ip);
+extern void dwarf_put_unwind_info (unw_addr_space_t as,
+                                   unw_proc_info_t *pi, void *arg);
+extern int dwarf_eval_expr (struct dwarf_cursor *c, unw_word_t stack_val, unw_word_t *addr,
+                            unw_word_t len, unw_word_t *valp,
+                            int *is_register);
+extern int
+dwarf_stack_aligned(struct dwarf_cursor *c, unw_word_t cfa_addr,
+                    unw_word_t rbp_addr, unw_word_t *offset);
+
+extern int dwarf_extract_proc_info_from_fde (unw_addr_space_t as,
+                                             unw_accessors_t *a,
+                                             unw_word_t *fde_addr,
+                                             unw_proc_info_t *pi,
+                                             unw_word_t base,
+                                             int need_unwind_info,
+                                             int is_debug_frame,
+                                             void *arg);
+extern int dwarf_find_save_locs (struct dwarf_cursor *c);
+extern int dwarf_make_proc_info (struct dwarf_cursor *c);
+extern int dwarf_apply_reg_state (struct dwarf_cursor *c, struct dwarf_reg_state *rs);
+extern int dwarf_reg_states_iterate (struct dwarf_cursor *c, unw_reg_states_callback cb, void *token);
+extern int dwarf_read_encoded_pointer (unw_addr_space_t as,
+                                       unw_accessors_t *a,
+                                       unw_word_t *addr,
+                                       unsigned char encoding,
+                                       const unw_proc_info_t *pi,
+                                       unw_word_t *valp, void *arg);
+extern int dwarf_step (struct dwarf_cursor *c);
+extern int dwarf_flush_rs_cache (struct dwarf_rs_cache *cache);
+
+#endif /* dwarf_h */
diff --git a/src/third_party/unwind/dist/include/dwarf_i.h b/src/third_party/unwind/dist/include/dwarf_i.h
new file mode 100644
index 00000000000..983b9f5c2af
--- /dev/null
+++ b/src/third_party/unwind/dist/include/dwarf_i.h
@@ -0,0 +1,490 @@
+#ifndef DWARF_I_H
+#define DWARF_I_H
+
+/* This file contains definitions that cannot be used in code outside
+   of libunwind.  In particular, most inline functions are here
+   because otherwise they'd generate unresolved references when the
+   files are compiled with inlining disabled.  */
+
+#include "dwarf.h"
+#include "libunwind_i.h"
+
+/* Unless we are told otherwise, assume that a "machine address" is
+   the size of an unw_word_t.  */
+#ifndef dwarf_addr_size
+# define dwarf_addr_size(as) (sizeof (unw_word_t))
+#endif
+
+#ifndef dwarf_to_unw_regnum
+# define dwarf_to_unw_regnum_map                UNW_OBJ (dwarf_to_unw_regnum_map)
+extern const uint8_t dwarf_to_unw_regnum_map[DWARF_REGNUM_MAP_LENGTH];
+/* REG is evaluated multiple times; it better be side-effects free!  */
+# define dwarf_to_unw_regnum(reg)                                         \
+  (((reg) < DWARF_REGNUM_MAP_LENGTH) ? dwarf_to_unw_regnum_map[reg] : 0)
+#endif
+
+#ifdef UNW_LOCAL_ONLY
+
+/* In the local-only case, we can let the compiler directly access
+   memory and don't need to worry about differing byte-order.  */
+
+typedef union __attribute__ ((packed))
+  {
+    int8_t s8;
+    int16_t s16;
+    int32_t s32;
+    int64_t s64;
+    uint8_t u8;
+    uint16_t u16;
+    uint32_t u32;
+    uint64_t u64;
+    void *ptr;
+  }
+dwarf_misaligned_value_t;
+
+static inline int
+dwarf_reads8 (unw_addr_space_t as, unw_accessors_t *a, unw_word_t *addr,
+              int8_t *val, void *arg)
+{
+  dwarf_misaligned_value_t *mvp = (void *) (uintptr_t) *addr;
+
+  *val = mvp->s8;
+  *addr += sizeof (mvp->s8);
+  return 0;
+}
+
+static inline int
+dwarf_reads16 (unw_addr_space_t as, unw_accessors_t *a, unw_word_t *addr,
+               int16_t *val, void *arg)
+{
+  dwarf_misaligned_value_t *mvp = (void *) (uintptr_t) *addr;
+
+  *val = mvp->s16;
+  *addr += sizeof (mvp->s16);
+  return 0;
+}
+
+static inline int
+dwarf_reads32 (unw_addr_space_t as, unw_accessors_t *a, unw_word_t *addr,
+               int32_t *val, void *arg)
+{
+  dwarf_misaligned_value_t *mvp = (void *) (uintptr_t) *addr;
+
+  *val = mvp->s32;
+  *addr += sizeof (mvp->s32);
+  return 0;
+}
+
+static inline int
+dwarf_reads64 (unw_addr_space_t as, unw_accessors_t *a, unw_word_t *addr,
+               int64_t *val, void *arg)
+{
+  dwarf_misaligned_value_t *mvp = (void *) (uintptr_t) *addr;
+
+  *val = mvp->s64;
+  *addr += sizeof (mvp->s64);
+  return 0;
+}
+
+static inline int
+dwarf_readu8 (unw_addr_space_t as, unw_accessors_t *a, unw_word_t *addr,
+              uint8_t *val, void *arg)
+{
+  dwarf_misaligned_value_t *mvp = (void *) (uintptr_t) *addr;
+
+  *val = mvp->u8;
+  *addr += sizeof (mvp->u8);
+  return 0;
+}
+
+static inline int
+dwarf_readu16 (unw_addr_space_t as, unw_accessors_t *a, unw_word_t *addr,
+               uint16_t *val, void *arg)
+{
+  dwarf_misaligned_value_t *mvp = (void *) (uintptr_t) *addr;
+
+  *val = mvp->u16;
+  *addr += sizeof (mvp->u16);
+  return 0;
+}
+
+static inline int
+dwarf_readu32 (unw_addr_space_t as, unw_accessors_t *a, unw_word_t *addr,
+               uint32_t *val, void *arg)
+{
+  dwarf_misaligned_value_t *mvp = (void *) (uintptr_t) *addr;
+
+  *val = mvp->u32;
+  *addr += sizeof (mvp->u32);
+  return 0;
+}
+
+static inline int
+dwarf_readu64 (unw_addr_space_t as, unw_accessors_t *a, unw_word_t *addr,
+               uint64_t *val, void *arg)
+{
+  dwarf_misaligned_value_t *mvp = (void *) (uintptr_t) *addr;
+
+  *val = mvp->u64;
+  *addr += sizeof (mvp->u64);
+  return 0;
+}
+
+#else /* !UNW_LOCAL_ONLY */
+
+static inline int
+dwarf_readu8 (unw_addr_space_t as, unw_accessors_t *a, unw_word_t *addr,
+              uint8_t *valp, void *arg)
+{
+  unw_word_t val, aligned_addr = *addr & -sizeof (unw_word_t);
+  unw_word_t off = *addr - aligned_addr;
+  int ret;
+
+  *addr += 1;
+  ret = (*a->access_mem) (as, aligned_addr, &val, 0, arg);
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+  val >>= 8*off;
+#else
+  val >>= 8*(sizeof (unw_word_t) - 1 - off);
+#endif
+  *valp = (uint8_t) val;
+  return ret;
+}
+
+static inline int
+dwarf_readu16 (unw_addr_space_t as, unw_accessors_t *a, unw_word_t *addr,
+               uint16_t *val, void *arg)
+{
+  uint8_t v0, v1;
+  int ret;
+
+  if ((ret = dwarf_readu8 (as, a, addr, &v0, arg)) < 0
+      || (ret = dwarf_readu8 (as, a, addr, &v1, arg)) < 0)
+    return ret;
+
+  if (tdep_big_endian (as))
+    *val = (uint16_t) v0 << 8 | v1;
+  else
+    *val = (uint16_t) v1 << 8 | v0;
+  return 0;
+}
+
+static inline int
+dwarf_readu32 (unw_addr_space_t as, unw_accessors_t *a, unw_word_t *addr,
+               uint32_t *val, void *arg)
+{
+  uint16_t v0, v1;
+  int ret;
+
+  if ((ret = dwarf_readu16 (as, a, addr, &v0, arg)) < 0
+      || (ret = dwarf_readu16 (as, a, addr, &v1, arg)) < 0)
+    return ret;
+
+  if (tdep_big_endian (as))
+    *val = (uint32_t) v0 << 16 | v1;
+  else
+    *val = (uint32_t) v1 << 16 | v0;
+  return 0;
+}
+
+static inline int
+dwarf_readu64 (unw_addr_space_t as, unw_accessors_t *a, unw_word_t *addr,
+               uint64_t *val, void *arg)
+{
+  uint32_t v0, v1;
+  int ret;
+
+  if ((ret = dwarf_readu32 (as, a, addr, &v0, arg)) < 0
+      || (ret = dwarf_readu32 (as, a, addr, &v1, arg)) < 0)
+    return ret;
+
+  if (tdep_big_endian (as))
+    *val = (uint64_t) v0 << 32 | v1;
+  else
+    *val = (uint64_t) v1 << 32 | v0;
+  return 0;
+}
+
+static inline int
+dwarf_reads8 (unw_addr_space_t as, unw_accessors_t *a, unw_word_t *addr,
+              int8_t *val, void *arg)
+{
+  uint8_t uval;
+  int ret;
+
+  if ((ret = dwarf_readu8 (as, a, addr, &uval, arg)) < 0)
+    return ret;
+  *val = (int8_t) uval;
+  return 0;
+}
+
+static inline int
+dwarf_reads16 (unw_addr_space_t as, unw_accessors_t *a, unw_word_t *addr,
+               int16_t *val, void *arg)
+{
+  uint16_t uval;
+  int ret;
+
+  if ((ret = dwarf_readu16 (as, a, addr, &uval, arg)) < 0)
+    return ret;
+  *val = (int16_t) uval;
+  return 0;
+}
+
+static inline int
+dwarf_reads32 (unw_addr_space_t as, unw_accessors_t *a, unw_word_t *addr,
+               int32_t *val, void *arg)
+{
+  uint32_t uval;
+  int ret;
+
+  if ((ret = dwarf_readu32 (as, a, addr, &uval, arg)) < 0)
+    return ret;
+  *val = (int32_t) uval;
+  return 0;
+}
+
+static inline int
+dwarf_reads64 (unw_addr_space_t as, unw_accessors_t *a, unw_word_t *addr,
+               int64_t *val, void *arg)
+{
+  uint64_t uval;
+  int ret;
+
+  if ((ret = dwarf_readu64 (as, a, addr, &uval, arg)) < 0)
+    return ret;
+  *val = (int64_t) uval;
+  return 0;
+}
+
+#endif /* !UNW_LOCAL_ONLY */
+
+static inline int
+dwarf_readw (unw_addr_space_t as, unw_accessors_t *a, unw_word_t *addr,
+             unw_word_t *val, void *arg)
+{
+  uint32_t u32;
+  uint64_t u64;
+  int ret;
+
+  switch (dwarf_addr_size (as))
+    {
+    case 4:
+      ret = dwarf_readu32 (as, a, addr, &u32, arg);
+      if (ret < 0)
+        return ret;
+      *val = u32;
+      return ret;
+
+    case 8:
+      ret = dwarf_readu64 (as, a, addr, &u64, arg);
+      if (ret < 0)
+        return ret;
+      *val = u64;
+      return ret;
+
+    default:
+      abort ();
+    }
+}
+
+/* Read an unsigned "little-endian base 128" value.  See Chapter 7.6
+   of DWARF spec v3.  */
+
+static inline int
+dwarf_read_uleb128 (unw_addr_space_t as, unw_accessors_t *a, unw_word_t *addr,
+                    unw_word_t *valp, void *arg)
+{
+  unw_word_t val = 0, shift = 0;
+  unsigned char byte;
+  int ret;
+
+  do
+    {
+      if ((ret = dwarf_readu8 (as, a, addr, &byte, arg)) < 0)
+        return ret;
+
+      val |= ((unw_word_t) byte & 0x7f) << shift;
+      shift += 7;
+    }
+  while (byte & 0x80);
+
+  *valp = val;
+  return 0;
+}
+
+/* Read a signed "little-endian base 128" value.  See Chapter 7.6 of
+   DWARF spec v3.  */
+
+static inline int
+dwarf_read_sleb128 (unw_addr_space_t as, unw_accessors_t *a, unw_word_t *addr,
+                    unw_word_t *valp, void *arg)
+{
+  unw_word_t val = 0, shift = 0;
+  unsigned char byte;
+  int ret;
+
+  do
+    {
+      if ((ret = dwarf_readu8 (as, a, addr, &byte, arg)) < 0)
+        return ret;
+
+      val |= ((unw_word_t) byte & 0x7f) << shift;
+      shift += 7;
+    }
+  while (byte & 0x80);
+
+  if (shift < 8 * sizeof (unw_word_t) && (byte & 0x40) != 0)
+    /* sign-extend negative value */
+    val |= ((unw_word_t) -1) << shift;
+
+  *valp = val;
+  return 0;
+}
+
+static ALWAYS_INLINE int
+dwarf_read_encoded_pointer_inlined (unw_addr_space_t as, unw_accessors_t *a,
+                                    unw_word_t *addr, unsigned char encoding,
+                                    const unw_proc_info_t *pi,
+                                    unw_word_t *valp, void *arg)
+{
+  unw_word_t val, initial_addr = *addr;
+  uint16_t uval16;
+  uint32_t uval32;
+  uint64_t uval64;
+  int16_t sval16 = 0;
+  int32_t sval32 = 0;
+  int64_t sval64 = 0;
+  int ret;
+
+  /* DW_EH_PE_omit and DW_EH_PE_aligned don't follow the normal
+     format/application encoding.  Handle them first.  */
+  if (encoding == DW_EH_PE_omit)
+    {
+      *valp = 0;
+      return 0;
+    }
+  else if (encoding == DW_EH_PE_aligned)
+    {
+      int size = dwarf_addr_size (as);
+      *addr = (initial_addr + size - 1) & -size;
+      return dwarf_readw (as, a, addr, valp, arg);
+    }
+
+  switch (encoding & DW_EH_PE_FORMAT_MASK)
+    {
+    case DW_EH_PE_ptr:
+      if ((ret = dwarf_readw (as, a, addr, &val, arg)) < 0)
+        return ret;
+      break;
+
+    case DW_EH_PE_uleb128:
+      if ((ret = dwarf_read_uleb128 (as, a, addr, &val, arg)) < 0)
+        return ret;
+      break;
+
+    case DW_EH_PE_udata2:
+      if ((ret = dwarf_readu16 (as, a, addr, &uval16, arg)) < 0)
+        return ret;
+      val = uval16;
+      break;
+
+    case DW_EH_PE_udata4:
+      if ((ret = dwarf_readu32 (as, a, addr, &uval32, arg)) < 0)
+        return ret;
+      val = uval32;
+      break;
+
+    case DW_EH_PE_udata8:
+      if ((ret = dwarf_readu64 (as, a, addr, &uval64, arg)) < 0)
+        return ret;
+      val = uval64;
+      break;
+
+    case DW_EH_PE_sleb128:
+      if ((ret = dwarf_read_uleb128 (as, a, addr, &val, arg)) < 0)
+        return ret;
+      break;
+
+    case DW_EH_PE_sdata2:
+      if ((ret = dwarf_reads16 (as, a, addr, &sval16, arg)) < 0)
+        return ret;
+      val = sval16;
+      break;
+
+    case DW_EH_PE_sdata4:
+      if ((ret = dwarf_reads32 (as, a, addr, &sval32, arg)) < 0)
+        return ret;
+      val = sval32;
+      break;
+
+    case DW_EH_PE_sdata8:
+      if ((ret = dwarf_reads64 (as, a, addr, &sval64, arg)) < 0)
+        return ret;
+      val = sval64;
+      break;
+
+    default:
+      Debug (1, "unexpected encoding format 0x%x\n",
+             encoding & DW_EH_PE_FORMAT_MASK);
+      return -UNW_EINVAL;
+    }
+
+  if (val == 0)
+    {
+      /* 0 is a special value and always absolute.  */
+      *valp = 0;
+      return 0;
+    }
+
+  switch (encoding & DW_EH_PE_APPL_MASK)
+    {
+    case DW_EH_PE_absptr:
+      break;
+
+    case DW_EH_PE_pcrel:
+      val += initial_addr;
+      break;
+
+    case DW_EH_PE_datarel:
+      /* XXX For now, assume that data-relative addresses are relative
+         to the global pointer.  */
+      val += pi->gp;
+      break;
+
+    case DW_EH_PE_funcrel:
+      val += pi->start_ip;
+      break;
+
+    case DW_EH_PE_textrel:
+      /* XXX For now we don't support text-rel values.  If there is a
+         platform which needs this, we probably would have to add a
+         "segbase" member to unw_proc_info_t.  */
+    default:
+      Debug (1, "unexpected application type 0x%x\n",
+             encoding & DW_EH_PE_APPL_MASK);
+      return -UNW_EINVAL;
+    }
+
+  /* Trim off any extra bits.  Assume that sign extension isn't
+     required; the only place it is needed is MIPS kernel space
+     addresses.  */
+  if (sizeof (val) > dwarf_addr_size (as))
+    {
+      assert (dwarf_addr_size (as) == 4);
+      val = (uint32_t) val;
+    }
+
+  if (encoding & DW_EH_PE_indirect)
+    {
+      unw_word_t indirect_addr = val;
+
+      if ((ret = dwarf_readw (as, a, &indirect_addr, &val, arg)) < 0)
+        return ret;
+    }
+
+  *valp = val;
+  return 0;
+}
+
+#endif /* DWARF_I_H */
diff --git a/src/third_party/unwind/dist/include/libunwind-aarch64.h b/src/third_party/unwind/dist/include/libunwind-aarch64.h
new file mode 100644
index 00000000000..778b43626b9
--- /dev/null
+++ b/src/third_party/unwind/dist/include/libunwind-aarch64.h
@@ -0,0 +1,245 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+   Copyright (C) 2013 Linaro Limited
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef LIBUNWIND_H
+#define LIBUNWIND_H
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+#include <inttypes.h>
+#include <stddef.h>
+#include <ucontext.h>
+
+#define UNW_TARGET      aarch64
+#define UNW_TARGET_AARCH64      1
+
+#define _U_TDEP_QP_TRUE 0       /* see libunwind-dynamic.h  */
+
+/* This needs to be big enough to accommodate "struct cursor", while
+   leaving some slack for future expansion.  Changing this value will
+   require recompiling all users of this library.  Stack allocation is
+   relatively cheap and unwind-state copying is relatively rare, so we
+   want to err on making it rather too big than too small.
+
+   Calculation is regs used (64 + 34) * 2 + 40 (bytes of rest of
+   cursor) + padding
+*/
+
+#define UNW_TDEP_CURSOR_LEN     250
+
+typedef uint64_t unw_word_t;
+typedef int64_t unw_sword_t;
+
+typedef long double unw_tdep_fpreg_t;
+
+typedef struct
+  {
+    /* no aarch64-specific auxiliary proc-info */
+  }
+unw_tdep_proc_info_t;
+
+typedef enum
+  {
+    /* 64-bit general registers.  */
+    UNW_AARCH64_X0,
+    UNW_AARCH64_X1,
+    UNW_AARCH64_X2,
+    UNW_AARCH64_X3,
+    UNW_AARCH64_X4,
+    UNW_AARCH64_X5,
+    UNW_AARCH64_X6,
+    UNW_AARCH64_X7,
+    UNW_AARCH64_X8,
+
+    /* Temporary registers.  */
+    UNW_AARCH64_X9,
+    UNW_AARCH64_X10,
+    UNW_AARCH64_X11,
+    UNW_AARCH64_X12,
+    UNW_AARCH64_X13,
+    UNW_AARCH64_X14,
+    UNW_AARCH64_X15,
+
+    /* Intra-procedure-call temporary registers.  */
+    UNW_AARCH64_X16,
+    UNW_AARCH64_X17,
+
+    /* Callee-saved registers.  */
+    UNW_AARCH64_X18,
+    UNW_AARCH64_X19,
+    UNW_AARCH64_X20,
+    UNW_AARCH64_X21,
+    UNW_AARCH64_X22,
+    UNW_AARCH64_X23,
+    UNW_AARCH64_X24,
+    UNW_AARCH64_X25,
+    UNW_AARCH64_X26,
+    UNW_AARCH64_X27,
+    UNW_AARCH64_X28,
+
+    /* 64-bit frame pointer.  */
+    UNW_AARCH64_X29,
+
+    /* 64-bit link register.  */
+    UNW_AARCH64_X30,
+
+    /* 64-bit stack pointer.  */
+    UNW_AARCH64_SP =  31,
+    UNW_AARCH64_PC,
+    UNW_AARCH64_PSTATE,
+
+    /* 128-bit FP/Advanced SIMD registers.  */
+    UNW_AARCH64_V0 = 64,
+    UNW_AARCH64_V1,
+    UNW_AARCH64_V2,
+    UNW_AARCH64_V3,
+    UNW_AARCH64_V4,
+    UNW_AARCH64_V5,
+    UNW_AARCH64_V6,
+    UNW_AARCH64_V7,
+    UNW_AARCH64_V8,
+    UNW_AARCH64_V9,
+    UNW_AARCH64_V10,
+    UNW_AARCH64_V11,
+    UNW_AARCH64_V12,
+    UNW_AARCH64_V13,
+    UNW_AARCH64_V14,
+    UNW_AARCH64_V15,
+    UNW_AARCH64_V16,
+    UNW_AARCH64_V17,
+    UNW_AARCH64_V18,
+    UNW_AARCH64_V19,
+    UNW_AARCH64_V20,
+    UNW_AARCH64_V21,
+    UNW_AARCH64_V22,
+    UNW_AARCH64_V23,
+    UNW_AARCH64_V24,
+    UNW_AARCH64_V25,
+    UNW_AARCH64_V26,
+    UNW_AARCH64_V27,
+    UNW_AARCH64_V28,
+    UNW_AARCH64_V29,
+    UNW_AARCH64_V30,
+    UNW_AARCH64_V31,
+
+    UNW_AARCH64_FPSR,
+    UNW_AARCH64_FPCR,
+
+    /* For AArch64, the CFA is the value of SP (x31) at the call site of the
+       previous frame.  */
+    UNW_AARCH64_CFA = UNW_AARCH64_SP,
+
+    UNW_TDEP_LAST_REG = UNW_AARCH64_FPCR,
+
+    UNW_TDEP_IP = UNW_AARCH64_X30,
+    UNW_TDEP_SP = UNW_AARCH64_SP,
+    UNW_TDEP_EH = UNW_AARCH64_X0,
+
+  }
+aarch64_regnum_t;
+
+/* Use R0 through R3 to pass exception handling information.  */
+#define UNW_TDEP_NUM_EH_REGS    4
+
+typedef struct unw_tdep_save_loc
+  {
+    /* Additional target-dependent info on a save location.  */
+  }
+unw_tdep_save_loc_t;
+
+
+/* On AArch64, we can directly use ucontext_t as the unwind context,
+ * however, the __reserved struct is quite large: tune it down to only
+ * the necessary used fields.  */
+
+struct unw_sigcontext
+  {
+	uint64_t fault_address;
+	uint64_t regs[31];
+	uint64_t sp;
+	uint64_t pc;
+	uint64_t pstate;
+	uint8_t __reserved[(34 * 8)] __attribute__((__aligned__(16)));
+};
+
+typedef struct
+  {
+	unsigned long uc_flags;
+	struct ucontext *uc_link;
+	stack_t uc_stack;
+	__sigset_t uc_sigmask;
+	struct unw_sigcontext uc_mcontext;
+  } unw_tdep_context_t;
+
+typedef struct
+  {
+	uint32_t _ctx_magic;
+	uint32_t _ctx_size;
+	uint32_t fpsr;
+	uint32_t fpcr;
+	uint64_t vregs[64];
+  } unw_fpsimd_context_t;
+
+
+
+#include "libunwind-common.h"
+#include "libunwind-dynamic.h"
+
+#define unw_tdep_getcontext(uc) (({					\
+  unw_tdep_context_t *unw_ctx = (uc);					\
+  register uint64_t *unw_base __asm__ ("x0") = (uint64_t*) unw_ctx->uc_mcontext.regs;		\
+  __asm__ __volatile__ (						\
+     "stp x0, x1, [%[base], #0]\n" \
+     "stp x2, x3, [%[base], #16]\n" \
+     "stp x4, x5, [%[base], #32]\n" \
+     "stp x6, x7, [%[base], #48]\n" \
+     "stp x8, x9, [%[base], #64]\n" \
+     "stp x10, x11, [%[base], #80]\n" \
+     "stp x12, x13, [%[base], #96]\n" \
+     "stp x14, x13, [%[base], #112]\n" \
+     "stp x16, x17, [%[base], #128]\n" \
+     "stp x18, x19, [%[base], #144]\n" \
+     "stp x20, x21, [%[base], #160]\n" \
+     "stp x22, x23, [%[base], #176]\n" \
+     "stp x24, x25, [%[base], #192]\n" \
+     "stp x26, x27, [%[base], #208]\n" \
+     "stp x28, x29, [%[base], #224]\n" \
+     "str x30, [%[base], #240]\n" \
+     "mov x1, sp\n" \
+     "stp x1, x30, [%[base], #248]\n" \
+     : [base] "+r" (unw_base) : : "x1", "memory"); \
+  }), 0)
+#define unw_tdep_is_fpreg		UNW_ARCH_OBJ(is_fpreg)
+
+extern int unw_tdep_is_fpreg (int);
+
+#if defined(__cplusplus) || defined(c_plusplus)
+}
+#endif
+
+#endif /* LIBUNWIND_H */
diff --git a/src/third_party/unwind/dist/include/libunwind-arm.h b/src/third_party/unwind/dist/include/libunwind-arm.h
new file mode 100644
index 00000000000..6709b7abaee
--- /dev/null
+++ b/src/third_party/unwind/dist/include/libunwind-arm.h
@@ -0,0 +1,303 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef LIBUNWIND_H
+#define LIBUNWIND_H
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+#include <inttypes.h>
+#include <stddef.h>
+
+#define UNW_TARGET      arm
+#define UNW_TARGET_ARM  1
+
+#define _U_TDEP_QP_TRUE 0       /* see libunwind-dynamic.h  */
+
+/* This needs to be big enough to accommodate "struct cursor", while
+   leaving some slack for future expansion.  Changing this value will
+   require recompiling all users of this library.  Stack allocation is
+   relatively cheap and unwind-state copying is relatively rare, so we
+   want to err on making it rather too big than too small.  */
+   
+/* FIXME for ARM. Too big?  What do other things use for similar tasks?  */
+#define UNW_TDEP_CURSOR_LEN     4096
+
+typedef uint32_t unw_word_t;
+typedef int32_t unw_sword_t;
+
+typedef long double unw_tdep_fpreg_t;
+
+typedef enum
+  {
+    UNW_ARM_R0,
+    UNW_ARM_R1,
+    UNW_ARM_R2,
+    UNW_ARM_R3,
+    UNW_ARM_R4,
+    UNW_ARM_R5,
+    UNW_ARM_R6,
+    UNW_ARM_R7,
+    UNW_ARM_R8,
+    UNW_ARM_R9,
+    UNW_ARM_R10,
+    UNW_ARM_R11,
+    UNW_ARM_R12,
+    UNW_ARM_R13,
+    UNW_ARM_R14,
+    UNW_ARM_R15,
+    
+    /* VFPv2 s0-s31 (obsolescent numberings).  */
+    UNW_ARM_S0 = 64,
+    UNW_ARM_S1,
+    UNW_ARM_S2,
+    UNW_ARM_S3,
+    UNW_ARM_S4,
+    UNW_ARM_S5,
+    UNW_ARM_S6,
+    UNW_ARM_S7,
+    UNW_ARM_S8,
+    UNW_ARM_S9,
+    UNW_ARM_S10,
+    UNW_ARM_S11,
+    UNW_ARM_S12,
+    UNW_ARM_S13,
+    UNW_ARM_S14,
+    UNW_ARM_S15,
+    UNW_ARM_S16,
+    UNW_ARM_S17,
+    UNW_ARM_S18,
+    UNW_ARM_S19,
+    UNW_ARM_S20,
+    UNW_ARM_S21,
+    UNW_ARM_S22,
+    UNW_ARM_S23,
+    UNW_ARM_S24,
+    UNW_ARM_S25,
+    UNW_ARM_S26,
+    UNW_ARM_S27,
+    UNW_ARM_S28,
+    UNW_ARM_S29,
+    UNW_ARM_S30,
+    UNW_ARM_S31,
+    
+    /* FPA register numberings.  */
+    UNW_ARM_F0 = 96,
+    UNW_ARM_F1,
+    UNW_ARM_F2,
+    UNW_ARM_F3,
+    UNW_ARM_F4,
+    UNW_ARM_F5,
+    UNW_ARM_F6,
+    UNW_ARM_F7,
+    
+    /* iWMMXt GR register numberings.  */
+    UNW_ARM_wCGR0 = 104,
+    UNW_ARM_wCGR1,
+    UNW_ARM_wCGR2,
+    UNW_ARM_wCGR3,
+    UNW_ARM_wCGR4,
+    UNW_ARM_wCGR5,
+    UNW_ARM_wCGR6,
+    UNW_ARM_wCGR7,
+    
+    /* iWMMXt register numberings.  */
+    UNW_ARM_wR0 = 112,
+    UNW_ARM_wR1,
+    UNW_ARM_wR2,
+    UNW_ARM_wR3,
+    UNW_ARM_wR4,
+    UNW_ARM_wR5,
+    UNW_ARM_wR6,
+    UNW_ARM_wR7,
+    UNW_ARM_wR8,
+    UNW_ARM_wR9,
+    UNW_ARM_wR10,
+    UNW_ARM_wR11,
+    UNW_ARM_wR12,
+    UNW_ARM_wR13,
+    UNW_ARM_wR14,
+    UNW_ARM_wR15,
+    
+    /* Two-byte encodings from here on.  */
+    
+    /* SPSR.  */
+    UNW_ARM_SPSR = 128,
+    UNW_ARM_SPSR_FIQ,
+    UNW_ARM_SPSR_IRQ,
+    UNW_ARM_SPSR_ABT,
+    UNW_ARM_SPSR_UND,
+    UNW_ARM_SPSR_SVC,
+    
+    /* User mode registers.  */
+    UNW_ARM_R8_USR = 144,
+    UNW_ARM_R9_USR,
+    UNW_ARM_R10_USR,
+    UNW_ARM_R11_USR,
+    UNW_ARM_R12_USR,
+    UNW_ARM_R13_USR,
+    UNW_ARM_R14_USR,
+    
+    /* FIQ registers.  */
+    UNW_ARM_R8_FIQ = 151,
+    UNW_ARM_R9_FIQ,
+    UNW_ARM_R10_FIQ,
+    UNW_ARM_R11_FIQ,
+    UNW_ARM_R12_FIQ,
+    UNW_ARM_R13_FIQ,
+    UNW_ARM_R14_FIQ,
+    
+    /* IRQ registers.  */
+    UNW_ARM_R13_IRQ = 158,
+    UNW_ARM_R14_IRQ,
+    
+    /* ABT registers.  */
+    UNW_ARM_R13_ABT = 160,
+    UNW_ARM_R14_ABT,
+    
+    /* UND registers.  */
+    UNW_ARM_R13_UND = 162,
+    UNW_ARM_R14_UND,
+    
+    /* SVC registers.  */
+    UNW_ARM_R13_SVC = 164,
+    UNW_ARM_R14_SVC,
+    
+    /* iWMMXt control registers.  */
+    UNW_ARM_wC0 = 192,
+    UNW_ARM_wC1,
+    UNW_ARM_wC2,
+    UNW_ARM_wC3,
+    UNW_ARM_wC4,
+    UNW_ARM_wC5,
+    UNW_ARM_wC6,
+    UNW_ARM_wC7,
+
+    /* VFPv3/Neon 64-bit registers.  */
+    UNW_ARM_D0 = 256,
+    UNW_ARM_D1,
+    UNW_ARM_D2,
+    UNW_ARM_D3,
+    UNW_ARM_D4,
+    UNW_ARM_D5,
+    UNW_ARM_D6,
+    UNW_ARM_D7,
+    UNW_ARM_D8,
+    UNW_ARM_D9,
+    UNW_ARM_D10,
+    UNW_ARM_D11,
+    UNW_ARM_D12,
+    UNW_ARM_D13,
+    UNW_ARM_D14,
+    UNW_ARM_D15,
+    UNW_ARM_D16,
+    UNW_ARM_D17,
+    UNW_ARM_D18,
+    UNW_ARM_D19,
+    UNW_ARM_D20,
+    UNW_ARM_D21,
+    UNW_ARM_D22,
+    UNW_ARM_D23,
+    UNW_ARM_D24,
+    UNW_ARM_D25,
+    UNW_ARM_D26,
+    UNW_ARM_D27,
+    UNW_ARM_D28,
+    UNW_ARM_D29,
+    UNW_ARM_D30,
+    UNW_ARM_D31,
+
+    /* For ARM, the CFA is the value of SP (r13) at the call site in the
+       previous frame.  */
+    UNW_ARM_CFA,
+
+    UNW_TDEP_LAST_REG = UNW_ARM_D31,
+
+    UNW_TDEP_IP = UNW_ARM_R14,  /* A little white lie.  */
+    UNW_TDEP_SP = UNW_ARM_R13,
+    UNW_TDEP_EH = UNW_ARM_R0   /* FIXME.  */
+  }
+arm_regnum_t;
+
+#define UNW_TDEP_NUM_EH_REGS    2       /* FIXME for ARM.  */
+
+typedef struct unw_tdep_save_loc
+  {
+    /* Additional target-dependent info on a save location.  */
+  }
+unw_tdep_save_loc_t;
+
+/* On ARM, we define our own unw_tdep_context instead of using ucontext_t.
+   This allows us to support systems that don't support getcontext and
+   therefore do not define ucontext_t.  */
+typedef struct unw_tdep_context
+  {
+    unsigned long regs[16];
+  }
+unw_tdep_context_t;
+
+/* There is no getcontext() on ARM.  Use a stub version which only saves GP
+   registers.  FIXME: Not ideal, may not be sufficient for all libunwind
+   use cases.  Stores pc+8, which is only approximately correct, really.  */
+#ifndef __thumb__
+#define unw_tdep_getcontext(uc) (({                                     \
+  unw_tdep_context_t *unw_ctx = (uc);                                   \
+  register unsigned long *unw_base __asm__ ("r0") = unw_ctx->regs;      \
+  __asm__ __volatile__ (                                                \
+    "stmia %[base], {r0-r15}"                                           \
+    : : [base] "r" (unw_base) : "memory");                              \
+  }), 0)
+#else /* __thumb__ */
+#define unw_tdep_getcontext(uc) (({                                     \
+  unw_tdep_context_t *unw_ctx = (uc);                                   \
+  register unsigned long *unw_base __asm__ ("r0") = unw_ctx->regs;      \
+  __asm__ __volatile__ (                                                \
+    ".align 2\nbx pc\nnop\n.code 32\n"                                  \
+    "stmia %[base], {r0-r15}\n"                                         \
+    "orr %[base], pc, #1\nbx %[base]\n"                                 \
+    ".code 16\n"							\
+    : [base] "+r" (unw_base) : : "memory", "cc");                       \
+  }), 0)
+#endif
+
+#include "libunwind-dynamic.h"
+
+typedef struct
+  {
+    /* no arm-specific auxiliary proc-info */
+  }
+unw_tdep_proc_info_t;
+
+#include "libunwind-common.h"
+
+#define unw_tdep_is_fpreg               UNW_ARCH_OBJ(is_fpreg)
+extern int unw_tdep_is_fpreg (int);
+
+#if defined(__cplusplus) || defined(c_plusplus)
+}
+#endif
+
+#endif /* LIBUNWIND_H */
diff --git a/src/third_party/unwind/dist/include/libunwind-common.h.in b/src/third_party/unwind/dist/include/libunwind-common.h.in
new file mode 100644
index 00000000000..c82a8b90cae
--- /dev/null
+++ b/src/third_party/unwind/dist/include/libunwind-common.h.in
@@ -0,0 +1,279 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#define UNW_VERSION_MAJOR	@PKG_MAJOR@
+#define UNW_VERSION_MINOR	@PKG_MINOR@
+#define UNW_VERSION_EXTRA	@PKG_EXTRA@
+
+#define UNW_VERSION_CODE(maj,min)	(((maj) << 16) | (min))
+#define UNW_VERSION	UNW_VERSION_CODE(UNW_VERSION_MAJOR, UNW_VERSION_MINOR)
+
+#define UNW_PASTE2(x,y)	x##y
+#define UNW_PASTE(x,y)	UNW_PASTE2(x,y)
+#define UNW_OBJ(fn)	UNW_PASTE(UNW_PREFIX, fn)
+#define UNW_ARCH_OBJ(fn) UNW_PASTE(UNW_PASTE(UNW_PASTE(_U,UNW_TARGET),_), fn)
+
+#ifdef UNW_LOCAL_ONLY
+# define UNW_PREFIX	UNW_PASTE(UNW_PASTE(_UL,UNW_TARGET),_)
+#else /* !UNW_LOCAL_ONLY */
+# define UNW_PREFIX	UNW_PASTE(UNW_PASTE(_U,UNW_TARGET),_)
+#endif /* !UNW_LOCAL_ONLY */
+
+/* Error codes.  The unwind routines return the *negated* values of
+   these error codes on error and a non-negative value on success.  */
+typedef enum
+  {
+    UNW_ESUCCESS = 0,		/* no error */
+    UNW_EUNSPEC,		/* unspecified (general) error */
+    UNW_ENOMEM,			/* out of memory */
+    UNW_EBADREG,		/* bad register number */
+    UNW_EREADONLYREG,		/* attempt to write read-only register */
+    UNW_ESTOPUNWIND,		/* stop unwinding */
+    UNW_EINVALIDIP,		/* invalid IP */
+    UNW_EBADFRAME,		/* bad frame */
+    UNW_EINVAL,			/* unsupported operation or bad value */
+    UNW_EBADVERSION,		/* unwind info has unsupported version */
+    UNW_ENOINFO			/* no unwind info found */
+  }
+unw_error_t;
+
+/* The following enum defines the indices for a couple of
+   (pseudo-)registers which have the same meaning across all
+   platforms.  (RO) means read-only.  (RW) means read-write.  General
+   registers (aka "integer registers") are expected to start with
+   index 0.  The number of such registers is architecture-dependent.
+   The remaining indices can be used as an architecture sees fit.  The
+   last valid register index is given by UNW_REG_LAST.  */
+typedef enum
+  {
+    UNW_REG_IP = UNW_TDEP_IP,		/* (rw) instruction pointer (pc) */
+    UNW_REG_SP = UNW_TDEP_SP,		/* (ro) stack pointer */
+    UNW_REG_EH = UNW_TDEP_EH,		/* (rw) exception-handling reg base */
+    UNW_REG_LAST = UNW_TDEP_LAST_REG
+  }
+unw_frame_regnum_t;
+
+/* Number of exception-handler argument registers: */
+#define UNW_NUM_EH_REGS		UNW_TDEP_NUM_EH_REGS
+
+typedef enum
+  {
+    UNW_CACHE_NONE,			/* no caching */
+    UNW_CACHE_GLOBAL,			/* shared global cache */
+    UNW_CACHE_PER_THREAD		/* per-thread caching */
+  }
+unw_caching_policy_t;
+
+typedef enum
+  {
+    UNW_INIT_SIGNAL_FRAME = 1,          /* We know this is a signal frame */
+  }
+unw_init_local2_flags_t;
+
+typedef int unw_regnum_t;
+
+/* The unwind cursor starts at the youngest (most deeply nested) frame
+   and is used to track the frame state as the unwinder steps from
+   frame to frame.  It is safe to make (shallow) copies of variables
+   of this type.  */
+typedef struct unw_cursor
+  {
+    unw_word_t opaque[UNW_TDEP_CURSOR_LEN];
+  }
+unw_cursor_t;
+
+/* This type encapsulates the entire (preserved) machine-state.  */
+typedef unw_tdep_context_t unw_context_t;
+
+/* unw_getcontext() fills the unw_context_t pointed to by UC with the
+   machine state as it exists at the call-site.  For implementation
+   reasons, this needs to be a target-dependent macro.  It's easiest
+   to think of unw_getcontext() as being identical to getcontext(). */
+#define unw_getcontext(uc)		unw_tdep_getcontext(uc)
+
+/* Return 1 if register number R is a floating-point register, zero
+   otherwise.
+   This routine is signal-safe.  */
+#define unw_is_fpreg(r)			unw_tdep_is_fpreg(r)
+
+typedef unw_tdep_fpreg_t unw_fpreg_t;
+
+typedef struct unw_addr_space *unw_addr_space_t;
+
+/* Each target may define it's own set of flags, but bits 0-15 are
+   reserved for general libunwind-use.  */
+#define UNW_PI_FLAG_FIRST_TDEP_BIT	16
+/* The information comes from a .debug_frame section.  */
+#define UNW_PI_FLAG_DEBUG_FRAME	32
+
+typedef struct unw_proc_info
+  {
+    unw_word_t start_ip;	/* first IP covered by this procedure */
+    unw_word_t end_ip;		/* first IP NOT covered by this procedure */
+#if defined(NEED_LAST_IP)
+    unw_word_t last_ip;		/* first IP that could begin another procedure */
+#endif
+    unw_word_t lsda;		/* address of lang.-spec. data area (if any) */
+    unw_word_t handler;		/* optional personality routine */
+    unw_word_t gp;		/* global-pointer value for this procedure */
+    unw_word_t flags;		/* misc. flags */
+
+    int format;			/* unwind-info format (arch-specific) */
+    int unwind_info_size;	/* size of the information (if applicable) */
+    void *unwind_info;		/* unwind-info (arch-specific) */
+    unw_tdep_proc_info_t extra;	/* target-dependent auxiliary proc-info */
+  }
+unw_proc_info_t;
+
+typedef int (*unw_reg_states_callback)(void *token,
+				       void *reg_states_data,
+				       size_t reg_states_data_size,
+				       unw_word_t start_ip, unw_word_t end_ip);
+
+/* These are backend callback routines that provide access to the
+   state of a "remote" process.  This can be used, for example, to
+   unwind another process through the ptrace() interface.  */
+typedef struct unw_accessors
+  {
+    /* Look up the unwind info associated with instruction-pointer IP.
+       On success, the routine fills in the PROC_INFO structure.  */
+    int (*find_proc_info) (unw_addr_space_t, unw_word_t, unw_proc_info_t *,
+			   int, void *);
+
+    /* Release any resources (e.g., memory) that were allocated for
+       the unwind info returned in by a previous call to
+       find_proc_info() with NEED_UNWIND_INFO set to 1.  */
+    void (*put_unwind_info) (unw_addr_space_t, unw_proc_info_t *, void *);
+
+    /* Return the list-head of the dynamically registered unwind
+       info.  */
+    int (*get_dyn_info_list_addr) (unw_addr_space_t, unw_word_t *, void *);
+
+    /* Access aligned word at address ADDR.  The value is returned
+       according to the endianness of the host (e.g., if the host is
+       little-endian and the target is big-endian, access_mem() needs
+       to byte-swap the value before returning it).  */
+    int (*access_mem) (unw_addr_space_t, unw_word_t, unw_word_t *, int,
+		       void *);
+
+    /* Access register number REG at address ADDR.  */
+    int (*access_reg) (unw_addr_space_t, unw_regnum_t, unw_word_t *, int,
+		       void *);
+
+    /* Access register number REG at address ADDR.  */
+    int (*access_fpreg) (unw_addr_space_t, unw_regnum_t,
+			 unw_fpreg_t *, int, void *);
+
+    int (*resume) (unw_addr_space_t, unw_cursor_t *, void *);
+
+    /* Optional call back to obtain the name of a (static) procedure.
+       Dynamically generated procedures are handled automatically by
+       libunwind.  This callback is optional and may be set to
+       NULL.  */
+    int (*get_proc_name) (unw_addr_space_t, unw_word_t, char *, size_t,
+			  unw_word_t *, void *);
+  }
+unw_accessors_t;
+
+typedef enum unw_save_loc_type
+  {
+    UNW_SLT_NONE,	/* register is not saved ("not an l-value") */
+    UNW_SLT_MEMORY,	/* register has been saved in memory */
+    UNW_SLT_REG		/* register has been saved in (another) register */
+  }
+unw_save_loc_type_t;
+
+typedef struct unw_save_loc
+  {
+    unw_save_loc_type_t type;
+    union
+      {
+	unw_word_t addr;	/* valid if type==UNW_SLT_MEMORY */
+	unw_regnum_t regnum;	/* valid if type==UNW_SLT_REG */
+      }
+    u;
+    unw_tdep_save_loc_t extra;	/* target-dependent additional information */
+  }
+unw_save_loc_t;
+
+/* These routines work both for local and remote unwinding.  */
+
+#define unw_local_addr_space	UNW_OBJ(local_addr_space)
+#define unw_create_addr_space	UNW_OBJ(create_addr_space)
+#define unw_destroy_addr_space	UNW_OBJ(destroy_addr_space)
+#define unw_get_accessors	UNW_ARCH_OBJ(get_accessors)
+#define unw_get_accessors_int	UNW_ARCH_OBJ(get_accessors_int)
+#define unw_init_local		UNW_OBJ(init_local)
+#define unw_init_local2	        UNW_OBJ(init_local2)
+#define unw_init_remote		UNW_OBJ(init_remote)
+#define unw_step		UNW_OBJ(step)
+#define unw_resume		UNW_OBJ(resume)
+#define unw_get_proc_info	UNW_OBJ(get_proc_info)
+#define unw_get_proc_info_by_ip	UNW_OBJ(get_proc_info_by_ip)
+#define unw_reg_states_iterate  UNW_OBJ(reg_states_iterate)
+#define unw_apply_reg_state     UNW_OBJ(apply_reg_state)
+#define unw_get_reg		UNW_OBJ(get_reg)
+#define unw_set_reg		UNW_OBJ(set_reg)
+#define unw_get_fpreg		UNW_OBJ(get_fpreg)
+#define unw_set_fpreg		UNW_OBJ(set_fpreg)
+#define unw_get_save_loc	UNW_OBJ(get_save_loc)
+#define unw_is_signal_frame	UNW_OBJ(is_signal_frame)
+#define unw_get_proc_name	UNW_OBJ(get_proc_name)
+#define unw_set_caching_policy	UNW_OBJ(set_caching_policy)
+#define unw_set_cache_size	UNW_OBJ(set_cache_size)
+#define unw_regname		UNW_ARCH_OBJ(regname)
+#define unw_flush_cache		UNW_ARCH_OBJ(flush_cache)
+#define unw_strerror		UNW_ARCH_OBJ(strerror)
+
+extern unw_addr_space_t unw_create_addr_space (unw_accessors_t *, int);
+extern void unw_destroy_addr_space (unw_addr_space_t);
+extern unw_accessors_t *unw_get_accessors (unw_addr_space_t);
+extern unw_accessors_t *unw_get_accessors_int (unw_addr_space_t);
+extern void unw_flush_cache (unw_addr_space_t, unw_word_t, unw_word_t);
+extern int unw_set_caching_policy (unw_addr_space_t, unw_caching_policy_t);
+extern int unw_set_cache_size (unw_addr_space_t, size_t, int);
+extern const char *unw_regname (unw_regnum_t);
+
+extern int unw_init_local (unw_cursor_t *, unw_context_t *);
+extern int unw_init_local2 (unw_cursor_t *, unw_context_t *, int);
+extern int unw_init_remote (unw_cursor_t *, unw_addr_space_t, void *);
+extern int unw_step (unw_cursor_t *);
+extern int unw_resume (unw_cursor_t *);
+extern int unw_get_proc_info (unw_cursor_t *, unw_proc_info_t *);
+extern int unw_get_proc_info_by_ip (unw_addr_space_t, unw_word_t,
+				    unw_proc_info_t *, void *);
+extern int unw_reg_states_iterate (unw_cursor_t *, unw_reg_states_callback, void *);
+extern int unw_apply_reg_state (unw_cursor_t *, void *);
+extern int unw_get_reg (unw_cursor_t *, int, unw_word_t *);
+extern int unw_set_reg (unw_cursor_t *, int, unw_word_t);
+extern int unw_get_fpreg (unw_cursor_t *, int, unw_fpreg_t *);
+extern int unw_set_fpreg (unw_cursor_t *, int, unw_fpreg_t);
+extern int unw_get_save_loc (unw_cursor_t *, int, unw_save_loc_t *);
+extern int unw_is_signal_frame (unw_cursor_t *);
+extern int unw_get_proc_name (unw_cursor_t *, char *, size_t, unw_word_t *);
+extern const char *unw_strerror (int);
+extern int unw_backtrace (void **, int);
+
+extern unw_addr_space_t unw_local_addr_space;
diff --git a/src/third_party/unwind/dist/include/libunwind-coredump.h b/src/third_party/unwind/dist/include/libunwind-coredump.h
new file mode 100644
index 00000000000..3c7814140f9
--- /dev/null
+++ b/src/third_party/unwind/dist/include/libunwind-coredump.h
@@ -0,0 +1,73 @@
+/* libunwind - a platform-independent unwind library
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef libunwind_coredump_h
+#define libunwind_coredump_h
+
+#include <libunwind.h>
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+/* Helper routines which make it easy to use libunwind on a coredump.
+   They're available only if UNW_REMOTE_ONLY is _not_ defined and they
+   aren't really part of the libunwind API.  They are implemented in a
+   archive library called libunwind-coredump.a.  */
+
+struct UCD_info;
+
+extern struct UCD_info *_UCD_create(const char *filename);
+extern void _UCD_destroy(struct UCD_info *);
+
+extern int _UCD_get_num_threads(struct UCD_info *);
+extern void _UCD_select_thread(struct UCD_info *, int);
+extern pid_t _UCD_get_pid(struct UCD_info *);
+extern int _UCD_get_cursig(struct UCD_info *);
+extern int _UCD_add_backing_file_at_segment(struct UCD_info *, int phdr_no, const char *filename);
+extern int _UCD_add_backing_file_at_vaddr(struct UCD_info *,
+                                          unsigned long vaddr,
+                                          const char *filename);
+
+extern int _UCD_find_proc_info (unw_addr_space_t, unw_word_t,
+                                unw_proc_info_t *, int, void *);
+extern void _UCD_put_unwind_info (unw_addr_space_t, unw_proc_info_t *, void *);
+extern int _UCD_get_dyn_info_list_addr (unw_addr_space_t, unw_word_t *,
+                                        void *);
+extern int _UCD_access_mem (unw_addr_space_t, unw_word_t, unw_word_t *, int,
+                            void *);
+extern int _UCD_access_reg (unw_addr_space_t, unw_regnum_t, unw_word_t *,
+                            int, void *);
+extern int _UCD_access_fpreg (unw_addr_space_t, unw_regnum_t, unw_fpreg_t *,
+                              int, void *);
+extern int _UCD_get_proc_name (unw_addr_space_t, unw_word_t, char *, size_t,
+                               unw_word_t *, void *);
+extern int _UCD_resume (unw_addr_space_t, unw_cursor_t *, void *);
+extern unw_accessors_t _UCD_accessors;
+
+
+#if defined(__cplusplus) || defined(c_plusplus)
+}
+#endif
+
+#endif /* libunwind_coredump_h */
diff --git a/src/third_party/unwind/dist/include/libunwind-dynamic.h b/src/third_party/unwind/dist/include/libunwind-dynamic.h
new file mode 100644
index 00000000000..edb0bbd343d
--- /dev/null
+++ b/src/third_party/unwind/dist/include/libunwind-dynamic.h
@@ -0,0 +1,214 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* This file defines the runtime-support routines for dynamically
+generated code.  Even though it is implemented as part of libunwind,
+it is logically separate from the interface to perform the actual
+unwinding.  In particular, this interface is always used in the
+context of the unwind target, whereas the rest of the unwind API is
+used in context of the process that is doing the unwind (which may be
+a debugger running on another machine, for example).
+
+Note that the data-structures declared here server a dual purpose:
+when a program registers a dynamically generated procedure, it uses
+these structures directly.  On the other hand, with remote-unwinding,
+the data-structures are read from the remote process's memory and
+translated into internalized versions.  To facilitate remote-access,
+the following rules should be followed in declaring these structures:
+
+ (1) Declare a member as a pointer only if the the information the
+     member points to needs to be internalized as well (e.g., a
+     string representing a procedure name should be declared as
+     "const char *", but the instruction pointer should be declared
+     as unw_word_t).
+
+ (2) Provide sufficient padding to ensure that no implicit padding
+     will be needed on any of the supported target architectures.  For
+     the time being, padding data structures with the assumption that
+     sizeof (unw_word_t) == 8 should be sufficient.  (Note: it's not
+     impossible to internalize structures with internal padding, but
+     it does make the process a bit harder).
+
+ (3) Don't declare members that contain bitfields or floating-point
+     values.
+
+ (4) Don't declare members with enumeration types.  Declare them as
+     int32_t instead.  */
+
+typedef enum
+  {
+    UNW_DYN_STOP = 0,           /* end-of-unwind-info marker */
+    UNW_DYN_SAVE_REG,           /* save register to another register */
+    UNW_DYN_SPILL_FP_REL,       /* frame-pointer-relative register spill */
+    UNW_DYN_SPILL_SP_REL,       /* stack-pointer-relative register spill */
+    UNW_DYN_ADD,                /* add constant value to a register */
+    UNW_DYN_POP_FRAMES,         /* drop one or more stack frames */
+    UNW_DYN_LABEL_STATE,        /* name the current state */
+    UNW_DYN_COPY_STATE,         /* set the region's entry-state */
+    UNW_DYN_ALIAS               /* get unwind info from an alias */
+  }
+unw_dyn_operation_t;
+
+typedef enum
+  {
+    UNW_INFO_FORMAT_DYNAMIC,            /* unw_dyn_proc_info_t */
+    UNW_INFO_FORMAT_TABLE,              /* unw_dyn_table_t */
+    UNW_INFO_FORMAT_REMOTE_TABLE,       /* unw_dyn_remote_table_t */
+    UNW_INFO_FORMAT_ARM_EXIDX,          /* ARM specific unwind info */
+    UNW_INFO_FORMAT_IP_OFFSET,          /* Like UNW_INFO_FORMAT_REMOTE_TABLE, but
+                                           table entries are considered
+                                           relative to di->start_ip, rather
+                                           than di->segbase */
+  }
+unw_dyn_info_format_t;
+
+typedef struct unw_dyn_op
+  {
+    int8_t tag;                         /* what operation? */
+    int8_t qp;                          /* qualifying predicate register */
+    int16_t reg;                        /* what register */
+    int32_t when;                       /* when does it take effect? */
+    unw_word_t val;                     /* auxiliary value */
+  }
+unw_dyn_op_t;
+
+typedef struct unw_dyn_region_info
+  {
+    struct unw_dyn_region_info *next;   /* linked list of regions */
+    int32_t insn_count;                 /* region length (# of instructions) */
+    uint32_t op_count;                  /* length of op-array */
+    unw_dyn_op_t op[1];                 /* variable-length op-array */
+  }
+unw_dyn_region_info_t;
+
+typedef struct unw_dyn_proc_info
+  {
+    unw_word_t name_ptr;        /* address of human-readable procedure name */
+    unw_word_t handler;         /* address of personality routine */
+    uint32_t flags;
+    int32_t pad0;
+    unw_dyn_region_info_t *regions;
+  }
+unw_dyn_proc_info_t;
+
+typedef struct unw_dyn_table_info
+  {
+    unw_word_t name_ptr;        /* addr. of table name (e.g., library name) */
+    unw_word_t segbase;         /* segment base */
+    unw_word_t table_len;       /* must be a multiple of sizeof(unw_word_t)! */
+    unw_word_t *table_data;
+  }
+unw_dyn_table_info_t;
+
+typedef struct unw_dyn_remote_table_info
+  {
+    unw_word_t name_ptr;        /* addr. of table name (e.g., library name) */
+    unw_word_t segbase;         /* segment base */
+    unw_word_t table_len;       /* must be a multiple of sizeof(unw_word_t)! */
+    unw_word_t table_data;
+  }
+unw_dyn_remote_table_info_t;
+
+typedef struct unw_dyn_info
+  {
+    /* doubly-linked list of dyn-info structures: */
+    struct unw_dyn_info *next;
+    struct unw_dyn_info *prev;
+    unw_word_t start_ip;        /* first IP covered by this entry */
+    unw_word_t end_ip;          /* first IP NOT covered by this entry */
+    unw_word_t gp;              /* global-pointer in effect for this entry */
+    int32_t format;             /* real type: unw_dyn_info_format_t */
+    int32_t pad;
+    union
+      {
+        unw_dyn_proc_info_t pi;
+        unw_dyn_table_info_t ti;
+        unw_dyn_remote_table_info_t rti;
+      }
+    u;
+  }
+unw_dyn_info_t;
+
+typedef struct unw_dyn_info_list
+  {
+    uint32_t version;
+    uint32_t generation;
+    unw_dyn_info_t *first;
+  }
+unw_dyn_info_list_t;
+
+/* Return the size (in bytes) of an unw_dyn_region_info_t structure that can
+   hold OP_COUNT ops.  */
+#define _U_dyn_region_info_size(op_count)                               \
+        ((char *) (((unw_dyn_region_info_t *) NULL)->op + (op_count))   \
+         - (char *) NULL)
+
+/* Register the unwind info for a single procedure.
+   This routine is NOT signal-safe.  */
+extern void _U_dyn_register (unw_dyn_info_t *);
+
+/* Cancel the unwind info for a single procedure.
+   This routine is NOT signal-safe.  */
+extern void _U_dyn_cancel (unw_dyn_info_t *);
+
+
+/* Convenience routines.  */
+
+#define _U_dyn_op(_tag, _qp, _when, _reg, _val)                         \
+        ((unw_dyn_op_t) { (_tag), (_qp), (_reg), (_when), (_val) })
+
+#define _U_dyn_op_save_reg(op, qp, when, reg, dst)                      \
+        (*(op) = _U_dyn_op (UNW_DYN_SAVE_REG, (qp), (when), (reg), (dst)))
+
+#define _U_dyn_op_spill_fp_rel(op, qp, when, reg, offset)               \
+        (*(op) = _U_dyn_op (UNW_DYN_SPILL_FP_REL, (qp), (when), (reg),  \
+                            (offset)))
+
+#define _U_dyn_op_spill_sp_rel(op, qp, when, reg, offset)               \
+        (*(op) = _U_dyn_op (UNW_DYN_SPILL_SP_REL, (qp), (when), (reg),  \
+                            (offset)))
+
+#define _U_dyn_op_add(op, qp, when, reg, value)                         \
+        (*(op) = _U_dyn_op (UNW_DYN_ADD, (qp), (when), (reg), (value)))
+
+#define _U_dyn_op_pop_frames(op, qp, when, num_frames)                  \
+        (*(op) = _U_dyn_op (UNW_DYN_POP_FRAMES, (qp), (when), 0, (num_frames)))
+
+#define _U_dyn_op_label_state(op, label)                                \
+        (*(op) = _U_dyn_op (UNW_DYN_LABEL_STATE, _U_QP_TRUE, -1, 0, (label)))
+
+#define _U_dyn_op_copy_state(op, label)                                 \
+        (*(op) = _U_dyn_op (UNW_DYN_COPY_STATE, _U_QP_TRUE, -1, 0, (label)))
+
+#define _U_dyn_op_alias(op, qp, when, addr)                             \
+        (*(op) = _U_dyn_op (UNW_DYN_ALIAS, (qp), (when), 0, (addr)))
+
+#define _U_dyn_op_stop(op)                                              \
+        (*(op) = _U_dyn_op (UNW_DYN_STOP, _U_QP_TRUE, -1, 0, 0))
+
+/* The target-dependent qualifying predicate which is always TRUE.  On
+   IA-64, that's p0 (0), on non-predicated architectures, the value is
+   ignored.  */
+#define _U_QP_TRUE      _U_TDEP_QP_TRUE
diff --git a/src/third_party/unwind/dist/include/libunwind-hppa.h b/src/third_party/unwind/dist/include/libunwind-hppa.h
new file mode 100644
index 00000000000..7013aa77268
--- /dev/null
+++ b/src/third_party/unwind/dist/include/libunwind-hppa.h
@@ -0,0 +1,125 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef LIBUNWIND_H
+#define LIBUNWIND_H
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+#include <inttypes.h>
+#include <ucontext.h>
+
+#define UNW_TARGET      hppa
+#define UNW_TARGET_HPPA 1
+
+#define _U_TDEP_QP_TRUE 0       /* see libunwind-dynamic.h  */
+
+/* This needs to be big enough to accommodate "struct cursor", while
+   leaving some slack for future expansion.  Changing this value will
+   require recompiling all users of this library.  Stack allocation is
+   relatively cheap and unwind-state copying is relatively rare, so we
+   want to err on making it rather too big than too small.  */
+#define UNW_TDEP_CURSOR_LEN     511
+
+typedef uint32_t unw_word_t;
+typedef int32_t unw_sword_t;
+
+typedef union
+  {
+    struct { unw_word_t bits[2]; } raw;
+    double val;
+  }
+unw_tdep_fpreg_t;
+
+typedef enum
+  {
+    /* Note: general registers are expected to start with index 0.
+       This convention facilitates architecture-independent
+       implementation of the C++ exception handling ABI.  See
+       _Unwind_SetGR() and _Unwind_GetGR() for details.  */
+    UNW_HPPA_GR = 0,
+     UNW_HPPA_RP = 2,                   /* return pointer */
+     UNW_HPPA_FP = 3,                   /* frame pointer */
+     UNW_HPPA_SP = UNW_HPPA_GR + 30,
+
+    UNW_HPPA_FR = UNW_HPPA_GR + 32,
+
+    UNW_HPPA_IP = UNW_HPPA_FR + 32,     /* instruction pointer */
+
+    /* other "preserved" registers (fpsr etc.)... */
+
+    /* PA-RISC has 4 exception-argument registers but they're not
+       contiguous.  To deal with this, we define 4 pseudo
+       exception-handling registers which we then alias to the actual
+       physical register.  */
+
+    UNW_HPPA_EH0 = UNW_HPPA_IP + 1,     /* alias for UNW_HPPA_GR + 20 */
+    UNW_HPPA_EH1 = UNW_HPPA_EH0 + 1,    /* alias for UNW_HPPA_GR + 21 */
+    UNW_HPPA_EH2 = UNW_HPPA_EH1 + 1,    /* alias for UNW_HPPA_GR + 22 */
+    UNW_HPPA_EH3 = UNW_HPPA_EH2 + 1,    /* alias for UNW_HPPA_GR + 31 */
+
+    /* frame info (read-only) */
+    UNW_HPPA_CFA,
+
+    UNW_TDEP_LAST_REG = UNW_HPPA_IP,
+
+    UNW_TDEP_IP = UNW_HPPA_IP,
+    UNW_TDEP_SP = UNW_HPPA_SP,
+    UNW_TDEP_EH = UNW_HPPA_EH0
+  }
+hppa_regnum_t;
+
+#define UNW_TDEP_NUM_EH_REGS    4
+
+typedef struct unw_tdep_save_loc
+  {
+    /* Additional target-dependent info on a save location.  */
+  }
+unw_tdep_save_loc_t;
+
+/* On PA-RISC, we can directly use ucontext_t as the unwind context.  */
+typedef ucontext_t unw_tdep_context_t;
+
+#define unw_tdep_is_fpreg(r)            ((unsigned) ((r) - UNW_HPPA_FR) < 32)
+
+#include "libunwind-dynamic.h"
+
+typedef struct
+  {
+    /* no PA-RISC-specific auxiliary proc-info */
+  }
+unw_tdep_proc_info_t;
+
+#include "libunwind-common.h"
+
+#define unw_tdep_getcontext             UNW_ARCH_OBJ (getcontext)
+extern int unw_tdep_getcontext (unw_tdep_context_t *);
+
+#if defined(__cplusplus) || defined(c_plusplus)
+}
+#endif
+
+#endif /* LIBUNWIND_H */
diff --git a/src/third_party/unwind/dist/include/libunwind-ia64.h b/src/third_party/unwind/dist/include/libunwind-ia64.h
new file mode 100644
index 00000000000..0cc4f39eaab
--- /dev/null
+++ b/src/third_party/unwind/dist/include/libunwind-ia64.h
@@ -0,0 +1,194 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef LIBUNWIND_H
+#define LIBUNWIND_H
+
+#include <inttypes.h>
+#include <ucontext.h>
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+#ifdef ia64
+  /* This works around a bug in Intel's ECC v7.0 which defines "ia64"
+     as "1".  */
+# undef ia64
+#endif
+
+#ifdef __hpux
+  /* On HP-UX, there is no hope of supporting UNW_LOCAL_ONLY, because
+     it's impossible to obtain the address of the members in the
+     sigcontext structure.  */
+# undef UNW_LOCAL_ONLY
+# define UNW_GENERIC_ONLY
+#endif
+
+#define UNW_TARGET      ia64
+#define UNW_TARGET_IA64 1
+
+#define _U_TDEP_QP_TRUE 0       /* see libunwind-dynamic.h  */
+
+/* This needs to be big enough to accommodate "struct cursor", while
+   leaving some slack for future expansion.  Changing this value will
+   require recompiling all users of this library.  Stack allocation is
+   relatively cheap and unwind-state copying is relatively rare, so we
+   want to err on making it rather too big than too small.  */
+#define UNW_TDEP_CURSOR_LEN     511
+
+/* If this bit is it indicates that the procedure saved all of ar.bsp,
+   ar.bspstore, and ar.rnat.  If, additionally, ar.bsp != saved ar.bsp,
+   then this procedure has performed a register-backing-store switch.  */
+#define UNW_PI_FLAG_IA64_RBS_SWITCH_BIT (UNW_PI_FLAG_FIRST_TDEP_BIT + 0)
+
+#define UNW_PI_FLAG_IA64_RBS_SWITCH     (1 << UNW_PI_FLAG_IA64_RBS_SWITCH_BIT)
+
+typedef uint64_t unw_word_t;
+typedef int64_t unw_sword_t;
+
+/* On IA-64, we want to access the contents of floating-point
+   registers as a pair of "words", but to ensure 16-byte alignment, we
+   make it a union that contains a "long double".  This will do the
+   Right Thing on all known IA-64 platforms, including HP-UX.  */
+typedef union
+  {
+    struct { unw_word_t bits[2]; } raw;
+    long double dummy;  /* dummy to force 16-byte alignment */
+  }
+unw_tdep_fpreg_t;
+
+typedef struct
+  {
+    /* no ia64-specific auxiliary proc-info */
+  }
+unw_tdep_proc_info_t;
+
+typedef enum
+  {
+    /* Note: general registers are excepted to start with index 0.
+       This convention facilitates architecture-independent
+       implementation of the C++ exception handling ABI.  See
+       _Unwind_SetGR() and _Unwind_GetGR() for details.  */
+    UNW_IA64_GR = 0,                    /* general registers (r0..r127) */
+     UNW_IA64_GP = UNW_IA64_GR + 1,
+     UNW_IA64_TP = UNW_IA64_GR + 13,
+
+    UNW_IA64_NAT = UNW_IA64_GR + 128,   /* NaT registers (nat0..nat127) */
+
+    UNW_IA64_FR = UNW_IA64_NAT + 128,   /* fp registers (f0..f127) */
+
+    UNW_IA64_AR = UNW_IA64_FR + 128,    /* application registers (ar0..r127) */
+     UNW_IA64_AR_RSC = UNW_IA64_AR + 16,
+     UNW_IA64_AR_BSP = UNW_IA64_AR + 17,
+     UNW_IA64_AR_BSPSTORE = UNW_IA64_AR + 18,
+     UNW_IA64_AR_RNAT = UNW_IA64_AR + 19,
+     UNW_IA64_AR_CSD = UNW_IA64_AR + 25,
+     UNW_IA64_AR_26 = UNW_IA64_AR + 26,
+     UNW_IA64_AR_SSD = UNW_IA64_AR_26,
+     UNW_IA64_AR_CCV = UNW_IA64_AR + 32,
+     UNW_IA64_AR_UNAT = UNW_IA64_AR + 36,
+     UNW_IA64_AR_FPSR = UNW_IA64_AR + 40,
+     UNW_IA64_AR_PFS = UNW_IA64_AR + 64,
+     UNW_IA64_AR_LC = UNW_IA64_AR + 65,
+     UNW_IA64_AR_EC = UNW_IA64_AR + 66,
+
+    UNW_IA64_BR = UNW_IA64_AR + 128,    /* branch registers (b0..p7) */
+      UNW_IA64_RP = UNW_IA64_BR + 0,    /* return pointer (rp) */
+    UNW_IA64_PR = UNW_IA64_BR + 8,      /* predicate registers (p0..p63) */
+    UNW_IA64_CFM,
+
+    /* frame info: */
+    UNW_IA64_BSP,
+    UNW_IA64_IP,
+    UNW_IA64_SP,
+
+    UNW_TDEP_LAST_REG = UNW_IA64_SP,
+
+    UNW_TDEP_IP = UNW_IA64_IP,
+    UNW_TDEP_SP = UNW_IA64_SP,
+    UNW_TDEP_EH = UNW_IA64_GR + 15
+  }
+ia64_regnum_t;
+
+#define UNW_TDEP_NUM_EH_REGS    4       /* r15-r18 are exception args */
+
+typedef struct unw_tdep_save_loc
+  {
+    /* Additional target-dependent info on a save location.  On IA-64,
+       we use this to provide the bit number in which a NaT bit gets
+       saved.  */
+    uint8_t nat_bitnr;
+
+    /* Padding reserved for future use.  */
+    uint8_t reserved[7];
+  }
+unw_tdep_save_loc_t;
+
+/* On IA-64, we can directly use ucontext_t as the unwind context.  */
+typedef ucontext_t unw_tdep_context_t;
+
+#define unw_tdep_is_fpreg(r)            ((unsigned) ((r) - UNW_IA64_FR) < 128)
+
+#include "libunwind-dynamic.h"
+#include "libunwind-common.h"
+
+#ifdef __hpux
+  /* In theory, we could use _Uia64_getcontext() on HP-UX as well, but
+     the benefit of doing so would be marginal given that it can't
+     support UNW_LOCAL_ONLY.  */
+# define unw_tdep_getcontext            getcontext
+#else
+# define unw_tdep_getcontext            UNW_ARCH_OBJ (getcontext)
+  extern int unw_tdep_getcontext (unw_tdep_context_t *);
+#endif
+
+/* This is a helper routine to search an ia64 unwind table.  If the
+   address-space argument AS points to something other than the local
+   address-space, the memory for the unwind-info will be allocated
+   with malloc(), and should be free()d during the put_unwind_info()
+   callback.  This routine is signal-safe for the local-address-space
+   case ONLY.  */
+#define unw_search_ia64_unwind_table    UNW_OBJ(search_unwind_table)
+extern int unw_search_ia64_unwind_table (unw_addr_space_t, unw_word_t,
+                                         unw_dyn_info_t *, unw_proc_info_t *,
+                                         int, void *);
+
+/* This is a helper routine which the get_dyn_info_list_addr()
+   callback can use to locate the special dynamic-info list entry in
+   an IA-64 unwind table.  If the entry exists in the table, the
+   list-address is returned.  In all other cases, 0 is returned.  */
+extern unw_word_t _Uia64_find_dyn_list (unw_addr_space_t, unw_dyn_info_t *,
+                                        void *);
+
+/* This is a helper routine to obtain the kernel-unwind info.  It is
+   signal-safe.  */
+extern int _Uia64_get_kernel_table (unw_dyn_info_t *);
+
+#if defined(__cplusplus) || defined(c_plusplus)
+}
+#endif
+
+#endif /* LIBUNWIND_H */
diff --git a/src/third_party/unwind/dist/include/libunwind-mips.h b/src/third_party/unwind/dist/include/libunwind-mips.h
new file mode 100644
index 00000000000..ced34b2027a
--- /dev/null
+++ b/src/third_party/unwind/dist/include/libunwind-mips.h
@@ -0,0 +1,160 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef LIBUNWIND_H
+#define LIBUNWIND_H
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+#include <inttypes.h>
+#include <sys/ucontext.h>
+
+#ifdef mips
+# undef mips
+#endif
+
+#define UNW_TARGET      mips
+#define UNW_TARGET_MIPS 1
+
+#define _U_TDEP_QP_TRUE 0       /* see libunwind-dynamic.h  */
+
+/* This needs to be big enough to accommodate "struct cursor", while
+   leaving some slack for future expansion.  Changing this value will
+   require recompiling all users of this library.  Stack allocation is
+   relatively cheap and unwind-state copying is relatively rare, so we
+   want to err on making it rather too big than too small.  */
+   
+/* FIXME for MIPS. Too big?  What do other things use for similar tasks?  */
+#define UNW_TDEP_CURSOR_LEN     4096
+
+/* The size of a "word" varies on MIPS. This type is used for memory
+   addresses and register values, which are 32-bit wide for O32 and N32 
+   ABIs, and 64-bit wide for N64 ABI. */
+#if _MIPS_SIM == _ABI64
+typedef uint64_t unw_word_t;
+#else
+typedef uint32_t unw_word_t;
+#endif
+typedef int32_t unw_sword_t;
+
+/* FIXME: MIPS ABIs.  */
+typedef long double unw_tdep_fpreg_t;
+
+typedef enum
+  {
+    UNW_MIPS_R0,
+    UNW_MIPS_R1,
+    UNW_MIPS_R2,
+    UNW_MIPS_R3,
+    UNW_MIPS_R4,
+    UNW_MIPS_R5,
+    UNW_MIPS_R6,
+    UNW_MIPS_R7,
+    UNW_MIPS_R8,
+    UNW_MIPS_R9,
+    UNW_MIPS_R10,
+    UNW_MIPS_R11,
+    UNW_MIPS_R12,
+    UNW_MIPS_R13,
+    UNW_MIPS_R14,
+    UNW_MIPS_R15,
+    UNW_MIPS_R16,
+    UNW_MIPS_R17,
+    UNW_MIPS_R18,
+    UNW_MIPS_R19,
+    UNW_MIPS_R20,
+    UNW_MIPS_R21,
+    UNW_MIPS_R22,
+    UNW_MIPS_R23,
+    UNW_MIPS_R24,
+    UNW_MIPS_R25,
+    UNW_MIPS_R26,
+    UNW_MIPS_R27,
+    UNW_MIPS_R28,
+    UNW_MIPS_R29,
+    UNW_MIPS_R30,
+    UNW_MIPS_R31,
+
+    UNW_MIPS_PC = 64,
+
+    /* FIXME: Other registers!  */
+
+    /* For MIPS, the CFA is the value of SP (r29) at the call site in the
+       previous frame.  */
+    UNW_MIPS_CFA,
+
+    UNW_TDEP_LAST_REG = UNW_MIPS_PC,
+
+    UNW_TDEP_IP = UNW_MIPS_R31,
+    UNW_TDEP_SP = UNW_MIPS_R29,
+    UNW_TDEP_EH = UNW_MIPS_R0   /* FIXME.  */
+  }
+mips_regnum_t;
+
+typedef enum
+  {
+    UNW_MIPS_ABI_O32,
+    UNW_MIPS_ABI_N32,
+    UNW_MIPS_ABI_N64
+  }
+mips_abi_t;
+
+#define UNW_TDEP_NUM_EH_REGS    2       /* FIXME for MIPS.  */
+
+typedef struct unw_tdep_save_loc
+  {
+    /* Additional target-dependent info on a save location.  */
+  }
+unw_tdep_save_loc_t;
+
+/* On x86, we can directly use ucontext_t as the unwind context.  FIXME for
+   MIPS.  */
+typedef ucontext_t unw_tdep_context_t;
+
+#include "libunwind-dynamic.h"
+
+typedef struct
+  {
+    /* no mips-specific auxiliary proc-info */
+  }
+unw_tdep_proc_info_t;
+
+#include "libunwind-common.h"
+
+/* There is no getcontext() on MIPS.  Use a stub version which only saves GP
+   registers.  FIXME: Not ideal, may not be sufficient for all libunwind
+   use cases.  */
+#define unw_tdep_getcontext UNW_ARCH_OBJ(getcontext)
+extern int unw_tdep_getcontext (ucontext_t *uc);
+
+#define unw_tdep_is_fpreg               UNW_ARCH_OBJ(is_fpreg)
+extern int unw_tdep_is_fpreg (int);
+
+#if defined(__cplusplus) || defined(c_plusplus)
+}
+#endif
+
+#endif /* LIBUNWIND_H */
diff --git a/src/third_party/unwind/dist/include/libunwind-ppc32.h b/src/third_party/unwind/dist/include/libunwind-ppc32.h
new file mode 100644
index 00000000000..47ebfde5a3c
--- /dev/null
+++ b/src/third_party/unwind/dist/include/libunwind-ppc32.h
@@ -0,0 +1,207 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+   Copied from libunwind-x86_64.h, modified slightly for building
+   frysk successfully on ppc64, by Wu Zhou <woodzltc@cn.ibm.com>
+   Will be replaced when libunwind is ready on ppc64 platform.
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef LIBUNWIND_H
+#define LIBUNWIND_H
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+#include <inttypes.h>
+#include <ucontext.h>
+
+#define UNW_TARGET              ppc32
+#define UNW_TARGET_PPC32        1
+
+#define _U_TDEP_QP_TRUE 0       /* see libunwind-dynamic.h  */
+
+/*
+ * This needs to be big enough to accommodate "struct cursor", while
+ * leaving some slack for future expansion.  Changing this value will
+ * require recompiling all users of this library.  Stack allocation is
+ * relatively cheap and unwind-state copying is relatively rare, so we want
+ * to err on making it rather too big than too small.
+ *
+ * To simplify this whole process, we are at least initially taking the
+ * tack that UNW_PPC32_* map straight across to the .eh_frame column register
+ * numbers.  These register numbers come from gcc's source in
+ * gcc/config/rs6000/rs6000.h
+ *
+ * UNW_TDEP_CURSOR_LEN is in terms of unw_word_t size.  Since we have 115
+ * elements in the loc array, each sized 2 * unw_word_t, plus the rest of
+ * the cursor struct, this puts us at about 2 * 115 + 40 = 270.  Let's
+ * round that up to 280.
+ */
+
+#define UNW_TDEP_CURSOR_LEN 280
+
+#if __WORDSIZE==32
+typedef uint32_t unw_word_t;
+typedef int32_t unw_sword_t;
+#else
+typedef uint64_t unw_word_t;
+typedef int64_t unw_sword_t;
+#endif
+
+typedef long double unw_tdep_fpreg_t;
+
+typedef enum
+  {
+    UNW_PPC32_R0,
+    UNW_PPC32_R1, /* called STACK_POINTER in gcc */
+    UNW_PPC32_R2,
+    UNW_PPC32_R3,
+    UNW_PPC32_R4,
+    UNW_PPC32_R5,
+    UNW_PPC32_R6,
+    UNW_PPC32_R7,
+    UNW_PPC32_R8,
+    UNW_PPC32_R9,
+    UNW_PPC32_R10,
+    UNW_PPC32_R11, /* called STATIC_CHAIN in gcc */
+    UNW_PPC32_R12,
+    UNW_PPC32_R13,
+    UNW_PPC32_R14,
+    UNW_PPC32_R15,
+    UNW_PPC32_R16,
+    UNW_PPC32_R17,
+    UNW_PPC32_R18,
+    UNW_PPC32_R19,
+    UNW_PPC32_R20,
+    UNW_PPC32_R21,
+    UNW_PPC32_R22,
+    UNW_PPC32_R23,
+    UNW_PPC32_R24,
+    UNW_PPC32_R25,
+    UNW_PPC32_R26,
+    UNW_PPC32_R27,
+    UNW_PPC32_R28,
+    UNW_PPC32_R29,
+    UNW_PPC32_R30,
+    UNW_PPC32_R31, /* called HARD_FRAME_POINTER in gcc */
+
+    /* Count Register */
+    UNW_PPC32_CTR = 32,
+    /* Fixed-Point Status and Control Register */
+    UNW_PPC32_XER = 33,
+    /* Condition Register */
+    UNW_PPC32_CCR = 34,
+    /* Machine State Register */
+    //UNW_PPC32_MSR = 35,
+    /* MQ or SPR0, not part of generic Power, part of MPC601 */
+    //UNW_PPC32_MQ = 36,
+    /* Link Register */
+    UNW_PPC32_LR = 36,
+    /* Floating Pointer Status and Control Register */
+    UNW_PPC32_FPSCR = 37,
+
+    UNW_PPC32_F0 = 48,
+    UNW_PPC32_F1,
+    UNW_PPC32_F2,
+    UNW_PPC32_F3,
+    UNW_PPC32_F4,
+    UNW_PPC32_F5,
+    UNW_PPC32_F6,
+    UNW_PPC32_F7,
+    UNW_PPC32_F8,
+    UNW_PPC32_F9,
+    UNW_PPC32_F10,
+    UNW_PPC32_F11,
+    UNW_PPC32_F12,
+    UNW_PPC32_F13,
+    UNW_PPC32_F14,
+    UNW_PPC32_F15,
+    UNW_PPC32_F16,
+    UNW_PPC32_F17,
+    UNW_PPC32_F18,
+    UNW_PPC32_F19,
+    UNW_PPC32_F20,
+    UNW_PPC32_F21,
+    UNW_PPC32_F22,
+    UNW_PPC32_F23,
+    UNW_PPC32_F24,
+    UNW_PPC32_F25,
+    UNW_PPC32_F26,
+    UNW_PPC32_F27,
+    UNW_PPC32_F28,
+    UNW_PPC32_F29,
+    UNW_PPC32_F30,
+    UNW_PPC32_F31,
+
+    UNW_TDEP_LAST_REG = UNW_PPC32_F31,
+
+    UNW_TDEP_IP = UNW_PPC32_LR,
+    UNW_TDEP_SP = UNW_PPC32_R1,
+    UNW_TDEP_EH = UNW_PPC32_R12
+  }
+ppc32_regnum_t;
+
+/*
+ * According to David Edelsohn, GNU gcc uses R3, R4, R5, and maybe R6 for
+ * passing parameters to exception handlers.
+ */
+
+#define UNW_TDEP_NUM_EH_REGS    4
+
+typedef struct unw_tdep_save_loc
+  {
+    /* Additional target-dependent info on a save location.  */
+  }
+unw_tdep_save_loc_t;
+
+/* On ppc, we can directly use ucontext_t as the unwind context.  */
+typedef ucontext_t unw_tdep_context_t;
+
+/* XXX this is not ideal: an application should not be prevented from
+   using the "getcontext" name just because it's using libunwind.  We
+   can't just use __getcontext() either, because that isn't exported
+   by glibc...  */
+#define unw_tdep_getcontext(uc)         (getcontext (uc), 0)
+
+#include "libunwind-dynamic.h"
+
+typedef struct
+  {
+    /* no ppc32-specific auxiliary proc-info */
+  }
+unw_tdep_proc_info_t;
+
+#include "libunwind-common.h"
+
+#define unw_tdep_is_fpreg               UNW_ARCH_OBJ(is_fpreg)
+extern int unw_tdep_is_fpreg (int);
+
+#if defined(__cplusplus) || defined(c_plusplus)
+}
+#endif
+
+#endif /* LIBUNWIND_H */
diff --git a/src/third_party/unwind/dist/include/libunwind-ppc64.h b/src/third_party/unwind/dist/include/libunwind-ppc64.h
new file mode 100644
index 00000000000..9944628da02
--- /dev/null
+++ b/src/third_party/unwind/dist/include/libunwind-ppc64.h
@@ -0,0 +1,271 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+   Copied from libunwind-x86_64.h, modified slightly for building
+   frysk successfully on ppc64, by Wu Zhou <woodzltc@cn.ibm.com>
+   Will be replaced when libunwind is ready on ppc64 platform.
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef LIBUNWIND_H
+#define LIBUNWIND_H
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+#include <inttypes.h>
+#include <ucontext.h>
+
+#define UNW_TARGET              ppc64
+#define UNW_TARGET_PPC64        1
+
+#define _U_TDEP_QP_TRUE 0       /* see libunwind-dynamic.h  */
+
+/*
+ * This needs to be big enough to accommodate "struct cursor", while
+ * leaving some slack for future expansion.  Changing this value will
+ * require recompiling all users of this library.  Stack allocation is
+ * relatively cheap and unwind-state copying is relatively rare, so we want
+ * to err on making it rather too big than too small.
+ *
+ * To simplify this whole process, we are at least initially taking the
+ * tack that UNW_PPC64_* map straight across to the .eh_frame column register
+ * numbers.  These register numbers come from gcc's source in
+ * gcc/config/rs6000/rs6000.h
+ *
+ * UNW_TDEP_CURSOR_LEN is in terms of unw_word_t size.  Since we have 115
+ * elements in the loc array, each sized 2 * unw_word_t, plus the rest of
+ * the cursor struct, this puts us at about 2 * 115 + 40 = 270.  Let's
+ * round that up to 280.
+ */
+
+#define UNW_TDEP_CURSOR_LEN 280
+
+#if __WORDSIZE==32
+typedef uint32_t unw_word_t;
+typedef int32_t unw_sword_t;
+#else
+typedef uint64_t unw_word_t;
+typedef int64_t unw_sword_t;
+#endif
+
+typedef long double unw_tdep_fpreg_t;
+
+/*
+ * Vector register (in PowerPC64 used for AltiVec registers)
+ */
+typedef struct {
+    uint64_t halves[2];
+} unw_tdep_vreg_t;
+
+typedef enum
+  {
+    UNW_PPC64_R0,
+    UNW_PPC64_R1, /* called STACK_POINTER in gcc */
+    UNW_PPC64_R2,
+    UNW_PPC64_R3,
+    UNW_PPC64_R4,
+    UNW_PPC64_R5,
+    UNW_PPC64_R6,
+    UNW_PPC64_R7,
+    UNW_PPC64_R8,
+    UNW_PPC64_R9,
+    UNW_PPC64_R10,
+    UNW_PPC64_R11, /* called STATIC_CHAIN in gcc */
+    UNW_PPC64_R12,
+    UNW_PPC64_R13,
+    UNW_PPC64_R14,
+    UNW_PPC64_R15,
+    UNW_PPC64_R16,
+    UNW_PPC64_R17,
+    UNW_PPC64_R18,
+    UNW_PPC64_R19,
+    UNW_PPC64_R20,
+    UNW_PPC64_R21,
+    UNW_PPC64_R22,
+    UNW_PPC64_R23,
+    UNW_PPC64_R24,
+    UNW_PPC64_R25,
+    UNW_PPC64_R26,
+    UNW_PPC64_R27,
+    UNW_PPC64_R28,
+    UNW_PPC64_R29,
+    UNW_PPC64_R30,
+    UNW_PPC64_R31, /* called HARD_FRAME_POINTER in gcc */
+
+    UNW_PPC64_F0 = 32,
+    UNW_PPC64_F1,
+    UNW_PPC64_F2,
+    UNW_PPC64_F3,
+    UNW_PPC64_F4,
+    UNW_PPC64_F5,
+    UNW_PPC64_F6,
+    UNW_PPC64_F7,
+    UNW_PPC64_F8,
+    UNW_PPC64_F9,
+    UNW_PPC64_F10,
+    UNW_PPC64_F11,
+    UNW_PPC64_F12,
+    UNW_PPC64_F13,
+    UNW_PPC64_F14,
+    UNW_PPC64_F15,
+    UNW_PPC64_F16,
+    UNW_PPC64_F17,
+    UNW_PPC64_F18,
+    UNW_PPC64_F19,
+    UNW_PPC64_F20,
+    UNW_PPC64_F21,
+    UNW_PPC64_F22,
+    UNW_PPC64_F23,
+    UNW_PPC64_F24,
+    UNW_PPC64_F25,
+    UNW_PPC64_F26,
+    UNW_PPC64_F27,
+    UNW_PPC64_F28,
+    UNW_PPC64_F29,
+    UNW_PPC64_F30,
+    UNW_PPC64_F31,
+    /* Note that there doesn't appear to be an .eh_frame register column
+       for the FPSCR register.  I don't know why this is.  Since .eh_frame
+       info is what this implementation uses for unwinding, we have no way
+       to unwind this register, and so we will not expose an FPSCR register
+       number in the libunwind API.
+     */
+
+    UNW_PPC64_LR = 65,
+    UNW_PPC64_CTR = 66,
+    UNW_PPC64_ARG_POINTER = 67,
+
+    UNW_PPC64_CR0 = 68,
+    UNW_PPC64_CR1,
+    UNW_PPC64_CR2,
+    UNW_PPC64_CR3,
+    UNW_PPC64_CR4,
+    /* CR5 .. CR7 are currently unused */
+    UNW_PPC64_CR5,
+    UNW_PPC64_CR6,
+    UNW_PPC64_CR7,
+
+    UNW_PPC64_XER = 76,
+
+    UNW_PPC64_V0 = 77,
+    UNW_PPC64_V1,
+    UNW_PPC64_V2,
+    UNW_PPC64_V3,
+    UNW_PPC64_V4,
+    UNW_PPC64_V5,
+    UNW_PPC64_V6,
+    UNW_PPC64_V7,
+    UNW_PPC64_V8,
+    UNW_PPC64_V9,
+    UNW_PPC64_V10,
+    UNW_PPC64_V11,
+    UNW_PPC64_V12,
+    UNW_PPC64_V13,
+    UNW_PPC64_V14,
+    UNW_PPC64_V15,
+    UNW_PPC64_V16,
+    UNW_PPC64_V17,
+    UNW_PPC64_V18,
+    UNW_PPC64_V19,
+    UNW_PPC64_V20,
+    UNW_PPC64_V21,
+    UNW_PPC64_V22,
+    UNW_PPC64_V23,
+    UNW_PPC64_V24,
+    UNW_PPC64_V25,
+    UNW_PPC64_V26,
+    UNW_PPC64_V27,
+    UNW_PPC64_V28,
+    UNW_PPC64_V29,
+    UNW_PPC64_V30,
+    UNW_PPC64_V31,
+
+    UNW_PPC64_VRSAVE = 109,
+    UNW_PPC64_VSCR = 110,
+    UNW_PPC64_SPE_ACC = 111,
+    UNW_PPC64_SPEFSCR = 112,
+
+    /* frame info (read-only) */
+    UNW_PPC64_FRAME_POINTER,
+    UNW_PPC64_NIP,
+
+
+    UNW_TDEP_LAST_REG = UNW_PPC64_NIP,
+
+    UNW_TDEP_IP = UNW_PPC64_NIP,
+    UNW_TDEP_SP = UNW_PPC64_R1,
+    UNW_TDEP_EH = UNW_PPC64_R12
+  }
+ppc64_regnum_t;
+
+typedef enum
+  {
+    UNW_PPC64_ABI_ELFv1,
+    UNW_PPC64_ABI_ELFv2
+  }
+ppc64_abi_t;
+
+/*
+ * According to David Edelsohn, GNU gcc uses R3, R4, R5, and maybe R6 for
+ * passing parameters to exception handlers.
+ */
+
+#define UNW_TDEP_NUM_EH_REGS    4
+
+typedef struct unw_tdep_save_loc
+  {
+    /* Additional target-dependent info on a save location.  */
+  }
+unw_tdep_save_loc_t;
+
+/* On ppc64, we can directly use ucontext_t as the unwind context.  */
+typedef ucontext_t unw_tdep_context_t;
+
+/* XXX this is not ideal: an application should not be prevented from
+   using the "getcontext" name just because it's using libunwind.  We
+   can't just use __getcontext() either, because that isn't exported
+   by glibc...  */
+#define unw_tdep_getcontext(uc)         (getcontext (uc), 0)
+
+#include "libunwind-dynamic.h"
+
+typedef struct
+  {
+    /* no ppc64-specific auxiliary proc-info */
+  }
+unw_tdep_proc_info_t;
+
+#include "libunwind-common.h"
+
+#define unw_tdep_is_fpreg               UNW_ARCH_OBJ(is_fpreg)
+extern int unw_tdep_is_fpreg (int);
+
+#if defined(__cplusplus) || defined(c_plusplus)
+}
+#endif
+
+#endif /* LIBUNWIND_H */
diff --git a/src/third_party/unwind/dist/include/libunwind-ptrace.h b/src/third_party/unwind/dist/include/libunwind-ptrace.h
new file mode 100644
index 00000000000..801325c4d4d
--- /dev/null
+++ b/src/third_party/unwind/dist/include/libunwind-ptrace.h
@@ -0,0 +1,63 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef libunwind_ptrace_h
+#define libunwind_ptrace_h
+
+#include <libunwind.h>
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+/* Helper routines which make it easy to use libunwind via ptrace().
+   They're available only if UNW_REMOTE_ONLY is _not_ defined and they
+   aren't really part of the libunwind API.  They are implemented in a
+   archive library called libunwind-ptrace.a.  */
+
+extern void *_UPT_create (pid_t);
+extern void _UPT_destroy (void *);
+extern int _UPT_find_proc_info (unw_addr_space_t, unw_word_t,
+                                unw_proc_info_t *, int, void *);
+extern void _UPT_put_unwind_info (unw_addr_space_t, unw_proc_info_t *, void *);
+extern int _UPT_get_dyn_info_list_addr (unw_addr_space_t, unw_word_t *,
+                                        void *);
+extern int _UPT_access_mem (unw_addr_space_t, unw_word_t, unw_word_t *, int,
+                            void *);
+extern int _UPT_access_reg (unw_addr_space_t, unw_regnum_t, unw_word_t *,
+                            int, void *);
+extern int _UPT_access_fpreg (unw_addr_space_t, unw_regnum_t, unw_fpreg_t *,
+                              int, void *);
+extern int _UPT_get_proc_name (unw_addr_space_t, unw_word_t, char *, size_t,
+                               unw_word_t *, void *);
+extern int _UPT_resume (unw_addr_space_t, unw_cursor_t *, void *);
+extern unw_accessors_t _UPT_accessors;
+
+
+#if defined(__cplusplus) || defined(c_plusplus)
+}
+#endif
+
+#endif /* libunwind_ptrace_h */
diff --git a/src/third_party/unwind/dist/include/libunwind-s390x.h b/src/third_party/unwind/dist/include/libunwind-s390x.h
new file mode 100644
index 00000000000..ebda40d57af
--- /dev/null
+++ b/src/third_party/unwind/dist/include/libunwind-s390x.h
@@ -0,0 +1,144 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for s390x by Michael Munday <mike.munday@ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef LIBUNWIND_H
+#define LIBUNWIND_H
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+#include <sys/types.h>
+#include <inttypes.h>
+#include <ucontext.h>
+
+#define UNW_TARGET              s390x
+#define UNW_TARGET_S390X        1
+
+#define _U_TDEP_QP_TRUE 0       /* see libunwind-dynamic.h  */
+
+/* This needs to be big enough to accommodate "struct cursor", while
+   leaving some slack for future expansion.  Changing this value will
+   require recompiling all users of this library.  Stack allocation is
+   relatively cheap and unwind-state copying is relatively rare, so we
+   want to err on making it rather too big than too small.  */
+#define UNW_TDEP_CURSOR_LEN     384
+
+typedef uint64_t unw_word_t;
+typedef int64_t unw_sword_t;
+
+typedef double unw_tdep_fpreg_t;
+
+typedef enum
+  {
+    /* general purpose registers */
+    UNW_S390X_R0,
+    UNW_S390X_R1,
+    UNW_S390X_R2,
+    UNW_S390X_R3,
+    UNW_S390X_R4,
+    UNW_S390X_R5,
+    UNW_S390X_R6,
+    UNW_S390X_R7,
+    UNW_S390X_R8,
+    UNW_S390X_R9,
+    UNW_S390X_R10,
+    UNW_S390X_R11,
+    UNW_S390X_R12,
+    UNW_S390X_R13,
+    UNW_S390X_R14,
+    UNW_S390X_R15,
+
+    /* floating point registers */
+    UNW_S390X_F0,
+    UNW_S390X_F1,
+    UNW_S390X_F2,
+    UNW_S390X_F3,
+    UNW_S390X_F4,
+    UNW_S390X_F5,
+    UNW_S390X_F6,
+    UNW_S390X_F7,
+    UNW_S390X_F8,
+    UNW_S390X_F9,
+    UNW_S390X_F10,
+    UNW_S390X_F11,
+    UNW_S390X_F12,
+    UNW_S390X_F13,
+    UNW_S390X_F14,
+    UNW_S390X_F15,
+
+    /* PSW */
+    UNW_S390X_IP,
+
+    UNW_TDEP_LAST_REG = UNW_S390X_IP,
+
+    /* TODO: access, vector registers */
+
+    /* frame info (read-only) */
+    UNW_S390X_CFA,
+
+    UNW_TDEP_IP = UNW_S390X_IP,
+    UNW_TDEP_SP = UNW_S390X_R15,
+
+    /* TODO: placeholders */
+    UNW_TDEP_EH = UNW_S390X_R0,
+  }
+s390x_regnum_t;
+
+#define UNW_TDEP_NUM_EH_REGS    2       /* XXX Not sure what this means */
+
+typedef struct unw_tdep_save_loc
+  {
+    /* Additional target-dependent info on a save location.  */
+    char unused;
+  }
+unw_tdep_save_loc_t;
+
+/* On s390x, we can directly use ucontext_t as the unwind context.  */
+typedef ucontext_t unw_tdep_context_t;
+
+typedef struct
+  {
+    /* no s390x-specific auxiliary proc-info */
+    char unused;
+  }
+unw_tdep_proc_info_t;
+
+#include "libunwind-dynamic.h"
+#include "libunwind-common.h"
+
+#define unw_tdep_getcontext             UNW_ARCH_OBJ(getcontext)
+#define unw_tdep_is_fpreg               UNW_ARCH_OBJ(is_fpreg)
+
+extern int unw_tdep_getcontext (unw_tdep_context_t *);
+extern int unw_tdep_is_fpreg (int);
+
+#if defined(__cplusplus) || defined(c_plusplus)
+}
+#endif
+
+#endif /* LIBUNWIND_H */
diff --git a/src/third_party/unwind/dist/include/libunwind-sh.h b/src/third_party/unwind/dist/include/libunwind-sh.h
new file mode 100644
index 00000000000..927f61ff42b
--- /dev/null
+++ b/src/third_party/unwind/dist/include/libunwind-sh.h
@@ -0,0 +1,114 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef LIBUNWIND_H
+#define LIBUNWIND_H
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+#include <inttypes.h>
+#include <stddef.h>
+#include <ucontext.h>
+
+#define UNW_TARGET      sh
+#define UNW_TARGET_SH   1
+
+#define _U_TDEP_QP_TRUE 0       /* see libunwind-dynamic.h  */
+
+/* This needs to be big enough to accommodate "struct cursor", while
+   leaving some slack for future expansion.  Changing this value will
+   require recompiling all users of this library.  Stack allocation is
+   relatively cheap and unwind-state copying is relatively rare, so we
+   want to err on making it rather too big than too small.  */
+
+#define UNW_TDEP_CURSOR_LEN     4096
+
+typedef uint32_t unw_word_t;
+typedef int32_t unw_sword_t;
+
+typedef long double unw_tdep_fpreg_t;
+
+typedef enum
+  {
+    UNW_SH_R0,
+    UNW_SH_R1,
+    UNW_SH_R2,
+    UNW_SH_R3,
+    UNW_SH_R4,
+    UNW_SH_R5,
+    UNW_SH_R6,
+    UNW_SH_R7,
+    UNW_SH_R8,
+    UNW_SH_R9,
+    UNW_SH_R10,
+    UNW_SH_R11,
+    UNW_SH_R12,
+    UNW_SH_R13,
+    UNW_SH_R14,
+    UNW_SH_R15,
+
+    UNW_SH_PC,
+    UNW_SH_PR,
+
+    UNW_TDEP_LAST_REG = UNW_SH_PR,
+
+    UNW_TDEP_IP = UNW_SH_PR,
+    UNW_TDEP_SP = UNW_SH_R15,
+    UNW_TDEP_EH = UNW_SH_R0
+  }
+sh_regnum_t;
+
+#define UNW_TDEP_NUM_EH_REGS    2
+
+typedef ucontext_t unw_tdep_context_t;
+
+#define unw_tdep_getcontext(uc)         (getcontext (uc), 0)
+
+typedef struct unw_tdep_save_loc
+  {
+    /* Additional target-dependent info on a save location.  */
+  }
+unw_tdep_save_loc_t;
+
+#include "libunwind-dynamic.h"
+
+typedef struct
+  {
+    /* no sh-specific auxiliary proc-info */
+  }
+unw_tdep_proc_info_t;
+
+#include "libunwind-common.h"
+
+#define unw_tdep_is_fpreg               UNW_ARCH_OBJ(is_fpreg)
+extern int unw_tdep_is_fpreg (int);
+
+#if defined(__cplusplus) || defined(c_plusplus)
+}
+#endif
+
+#endif /* LIBUNWIND_H */
diff --git a/src/third_party/unwind/dist/include/libunwind-tilegx.h b/src/third_party/unwind/dist/include/libunwind-tilegx.h
new file mode 100644
index 00000000000..0f84ea65ee3
--- /dev/null
+++ b/src/third_party/unwind/dist/include/libunwind-tilegx.h
@@ -0,0 +1,161 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2014 Tilera Corp.
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef LIBUNWIND_H
+#define LIBUNWIND_H
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+#include <inttypes.h>
+#include <ucontext.h>
+
+#define UNW_TARGET           tilegx
+#define UNW_TARGET_TILEGX    1
+
+#define _U_TDEP_QP_TRUE        0    /* see libunwind-dynamic.h  */
+
+/* This needs to be big enough to accommodate "struct cursor", while
+   leaving some slack for future expansion.  Changing this value will
+   require recompiling all users of this library.  Stack allocation is
+   relatively cheap and unwind-state copying is relatively rare, so we
+   want to err on making it rather too big than too small.  */
+
+#define UNW_TDEP_CURSOR_LEN   4096
+
+/* The size of a "word" varies on TILEGX.  This type is used for memory
+   addresses and register values. */
+typedef uint64_t unw_word_t;
+typedef int64_t unw_sword_t;
+
+typedef long double unw_tdep_fpreg_t;
+
+typedef enum
+{
+  UNW_TILEGX_R0,
+  UNW_TILEGX_R1,
+  UNW_TILEGX_R2,
+  UNW_TILEGX_R3,
+  UNW_TILEGX_R4,
+  UNW_TILEGX_R5,
+  UNW_TILEGX_R6,
+  UNW_TILEGX_R7,
+  UNW_TILEGX_R8,
+  UNW_TILEGX_R9,
+  UNW_TILEGX_R10,
+  UNW_TILEGX_R11,
+  UNW_TILEGX_R12,
+  UNW_TILEGX_R13,
+  UNW_TILEGX_R14,
+  UNW_TILEGX_R15,
+  UNW_TILEGX_R16,
+  UNW_TILEGX_R17,
+  UNW_TILEGX_R18,
+  UNW_TILEGX_R19,
+  UNW_TILEGX_R20,
+  UNW_TILEGX_R21,
+  UNW_TILEGX_R22,
+  UNW_TILEGX_R23,
+  UNW_TILEGX_R24,
+  UNW_TILEGX_R25,
+  UNW_TILEGX_R26,
+  UNW_TILEGX_R27,
+  UNW_TILEGX_R28,
+  UNW_TILEGX_R29,
+  UNW_TILEGX_R30,
+  UNW_TILEGX_R31,
+  UNW_TILEGX_R32,
+  UNW_TILEGX_R33,
+  UNW_TILEGX_R34,
+  UNW_TILEGX_R35,
+  UNW_TILEGX_R36,
+  UNW_TILEGX_R37,
+  UNW_TILEGX_R38,
+  UNW_TILEGX_R39,
+  UNW_TILEGX_R40,
+  UNW_TILEGX_R41,
+  UNW_TILEGX_R42,
+  UNW_TILEGX_R43,
+  UNW_TILEGX_R44,
+  UNW_TILEGX_R45,
+  UNW_TILEGX_R46,
+  UNW_TILEGX_R47,
+  UNW_TILEGX_R48,
+  UNW_TILEGX_R49,
+  UNW_TILEGX_R50,
+  UNW_TILEGX_R51,
+  UNW_TILEGX_R52,
+  UNW_TILEGX_R53,
+  UNW_TILEGX_R54,
+  UNW_TILEGX_R55,
+
+  /* FIXME: Other registers!  */
+
+  UNW_TILEGX_PC,
+  /* For TILEGX, the CFA is the value of SP (r54) at the call site in the
+     previous frame.  */
+  UNW_TILEGX_CFA,
+
+  UNW_TDEP_LAST_REG = UNW_TILEGX_PC,
+
+  UNW_TDEP_IP = UNW_TILEGX_R55,  /* R55 is link register for Tilegx */
+  UNW_TDEP_SP = UNW_TILEGX_R54,
+  UNW_TDEP_EH = UNW_TILEGX_R0   /* FIXME.  */
+} tilegx_regnum_t;
+
+typedef enum
+{
+  UNW_TILEGX_ABI_N64 = 2
+} tilegx_abi_t;
+
+#define UNW_TDEP_NUM_EH_REGS    2   /* FIXME for TILEGX.  */
+
+typedef struct unw_tdep_save_loc
+{
+  /* Additional target-dependent info on a save location.  */
+} unw_tdep_save_loc_t;
+
+typedef ucontext_t unw_tdep_context_t;
+
+#include "libunwind-dynamic.h"
+
+typedef struct
+{
+    /* no tilegx-specific auxiliary proc-info */
+} unw_tdep_proc_info_t;
+
+#include "libunwind-common.h"
+
+#define unw_tdep_getcontext  getcontext
+
+#define unw_tdep_is_fpreg    UNW_ARCH_OBJ(is_fpreg)
+extern int unw_tdep_is_fpreg (int);
+
+#if defined(__cplusplus) || defined(c_plusplus)
+}
+#endif
+
+#endif /* LIBUNWIND_H */
diff --git a/src/third_party/unwind/dist/include/libunwind-x86.h b/src/third_party/unwind/dist/include/libunwind-x86.h
new file mode 100644
index 00000000000..40fe0464f2f
--- /dev/null
+++ b/src/third_party/unwind/dist/include/libunwind-x86.h
@@ -0,0 +1,187 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef LIBUNWIND_H
+#define LIBUNWIND_H
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+#include <sys/types.h>
+#include <inttypes.h>
+#include <ucontext.h>
+
+#define UNW_TARGET      x86
+#define UNW_TARGET_X86  1
+
+#define _U_TDEP_QP_TRUE 0       /* see libunwind-dynamic.h  */
+
+/* This needs to be big enough to accommodate "struct cursor", while
+   leaving some slack for future expansion.  Changing this value will
+   require recompiling all users of this library.  Stack allocation is
+   relatively cheap and unwind-state copying is relatively rare, so we
+   want to err on making it rather too big than too small.  */
+#define UNW_TDEP_CURSOR_LEN     127
+
+typedef uint32_t unw_word_t;
+typedef int32_t unw_sword_t;
+
+typedef union {
+  struct { uint8_t b[4]; } val32;
+  struct { uint8_t b[10]; } val80;
+  struct { uint8_t b[16]; } val128;
+} unw_tdep_fpreg_t;
+
+typedef enum
+  {
+    /* Note: general registers are expected to start with index 0.
+       This convention facilitates architecture-independent
+       implementation of the C++ exception handling ABI.  See
+       _Unwind_SetGR() and _Unwind_GetGR() for details.
+
+       The described register usage convention is based on "System V
+       Application Binary Interface, Intel386 Architecture Processor
+       Supplement, Fourth Edition" at
+
+         http://www.linuxbase.org/spec/refspecs/elf/abi386-4.pdf
+
+       It would have been nice to use the same register numbering as
+       DWARF, but that doesn't work because the libunwind requires
+       that the exception argument registers be consecutive, which the
+       wouldn't be with the DWARF numbering.  */
+    UNW_X86_EAX,        /* scratch (exception argument 1) */
+    UNW_X86_EDX,        /* scratch (exception argument 2) */
+    UNW_X86_ECX,        /* scratch */
+    UNW_X86_EBX,        /* preserved */
+    UNW_X86_ESI,        /* preserved */
+    UNW_X86_EDI,        /* preserved */
+    UNW_X86_EBP,        /* (optional) frame-register */
+    UNW_X86_ESP,        /* (optional) frame-register */
+    UNW_X86_EIP,        /* frame-register */
+    UNW_X86_EFLAGS,     /* scratch (except for "direction", which is fixed */
+    UNW_X86_TRAPNO,     /* scratch */
+
+    /* MMX/stacked-fp registers */
+    UNW_X86_ST0,        /* fp return value */
+    UNW_X86_ST1,        /* scratch */
+    UNW_X86_ST2,        /* scratch */
+    UNW_X86_ST3,        /* scratch */
+    UNW_X86_ST4,        /* scratch */
+    UNW_X86_ST5,        /* scratch */
+    UNW_X86_ST6,        /* scratch */
+    UNW_X86_ST7,        /* scratch */
+
+    UNW_X86_FCW,        /* scratch */
+    UNW_X86_FSW,        /* scratch */
+    UNW_X86_FTW,        /* scratch */
+    UNW_X86_FOP,        /* scratch */
+    UNW_X86_FCS,        /* scratch */
+    UNW_X86_FIP,        /* scratch */
+    UNW_X86_FEA,        /* scratch */
+    UNW_X86_FDS,        /* scratch */
+
+    /* SSE registers */
+    UNW_X86_XMM0_lo,    /* scratch */
+    UNW_X86_XMM0_hi,    /* scratch */
+    UNW_X86_XMM1_lo,    /* scratch */
+    UNW_X86_XMM1_hi,    /* scratch */
+    UNW_X86_XMM2_lo,    /* scratch */
+    UNW_X86_XMM2_hi,    /* scratch */
+    UNW_X86_XMM3_lo,    /* scratch */
+    UNW_X86_XMM3_hi,    /* scratch */
+    UNW_X86_XMM4_lo,    /* scratch */
+    UNW_X86_XMM4_hi,    /* scratch */
+    UNW_X86_XMM5_lo,    /* scratch */
+    UNW_X86_XMM5_hi,    /* scratch */
+    UNW_X86_XMM6_lo,    /* scratch */
+    UNW_X86_XMM6_hi,    /* scratch */
+    UNW_X86_XMM7_lo,    /* scratch */
+    UNW_X86_XMM7_hi,    /* scratch */
+
+    UNW_X86_MXCSR,      /* scratch */
+
+    /* segment registers */
+    UNW_X86_GS,         /* special */
+    UNW_X86_FS,         /* special */
+    UNW_X86_ES,         /* special */
+    UNW_X86_DS,         /* special */
+    UNW_X86_SS,         /* special */
+    UNW_X86_CS,         /* special */
+    UNW_X86_TSS,        /* special */
+    UNW_X86_LDT,        /* special */
+
+    /* frame info (read-only) */
+    UNW_X86_CFA,
+
+    UNW_X86_XMM0,       /* scratch */
+    UNW_X86_XMM1,       /* scratch */
+    UNW_X86_XMM2,       /* scratch */
+    UNW_X86_XMM3,       /* scratch */
+    UNW_X86_XMM4,       /* scratch */
+    UNW_X86_XMM5,       /* scratch */
+    UNW_X86_XMM6,       /* scratch */
+    UNW_X86_XMM7,       /* scratch */
+
+    UNW_TDEP_LAST_REG = UNW_X86_XMM7,
+
+    UNW_TDEP_IP = UNW_X86_EIP,
+    UNW_TDEP_SP = UNW_X86_ESP,
+    UNW_TDEP_EH = UNW_X86_EAX
+  }
+x86_regnum_t;
+
+#define UNW_TDEP_NUM_EH_REGS    2       /* eax and edx are exception args */
+
+typedef struct unw_tdep_save_loc
+  {
+    /* Additional target-dependent info on a save location.  */
+  }
+unw_tdep_save_loc_t;
+
+/* On x86, we can directly use ucontext_t as the unwind context.  */
+typedef ucontext_t unw_tdep_context_t;
+
+#include "libunwind-dynamic.h"
+
+typedef struct
+  {
+    /* no x86-specific auxiliary proc-info */
+  }
+unw_tdep_proc_info_t;
+
+#include "libunwind-common.h"
+
+#define unw_tdep_getcontext             UNW_ARCH_OBJ(getcontext)
+extern int unw_tdep_getcontext (unw_tdep_context_t *);
+
+#define unw_tdep_is_fpreg               UNW_ARCH_OBJ(is_fpreg)
+extern int unw_tdep_is_fpreg (int);
+
+#if defined(__cplusplus) || defined(c_plusplus)
+}
+#endif
+
+#endif /* LIBUNWIND_H */
diff --git a/src/third_party/unwind/dist/include/libunwind-x86_64.h b/src/third_party/unwind/dist/include/libunwind-x86_64.h
new file mode 100644
index 00000000000..78eb541afb3
--- /dev/null
+++ b/src/third_party/unwind/dist/include/libunwind-x86_64.h
@@ -0,0 +1,141 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef LIBUNWIND_H
+#define LIBUNWIND_H
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+#include <sys/types.h>
+#include <inttypes.h>
+#include <ucontext.h>
+
+#define UNW_TARGET              x86_64
+#define UNW_TARGET_X86_64       1
+
+#define _U_TDEP_QP_TRUE 0       /* see libunwind-dynamic.h  */
+
+/* This needs to be big enough to accommodate "struct cursor", while
+   leaving some slack for future expansion.  Changing this value will
+   require recompiling all users of this library.  Stack allocation is
+   relatively cheap and unwind-state copying is relatively rare, so we
+   want to err on making it rather too big than too small.  */
+#define UNW_TDEP_CURSOR_LEN     127
+
+typedef uint64_t unw_word_t;
+typedef int64_t unw_sword_t;
+
+typedef long double unw_tdep_fpreg_t;
+
+typedef enum
+  {
+    UNW_X86_64_RAX,
+    UNW_X86_64_RDX,
+    UNW_X86_64_RCX,
+    UNW_X86_64_RBX,
+    UNW_X86_64_RSI,
+    UNW_X86_64_RDI,
+    UNW_X86_64_RBP,
+    UNW_X86_64_RSP,
+    UNW_X86_64_R8,
+    UNW_X86_64_R9,
+    UNW_X86_64_R10,
+    UNW_X86_64_R11,
+    UNW_X86_64_R12,
+    UNW_X86_64_R13,
+    UNW_X86_64_R14,
+    UNW_X86_64_R15,
+    UNW_X86_64_RIP,
+#ifdef CONFIG_MSABI_SUPPORT
+    UNW_X86_64_XMM0,
+    UNW_X86_64_XMM1,
+    UNW_X86_64_XMM2,
+    UNW_X86_64_XMM3,
+    UNW_X86_64_XMM4,
+    UNW_X86_64_XMM5,
+    UNW_X86_64_XMM6,
+    UNW_X86_64_XMM7,
+    UNW_X86_64_XMM8,
+    UNW_X86_64_XMM9,
+    UNW_X86_64_XMM10,
+    UNW_X86_64_XMM11,
+    UNW_X86_64_XMM12,
+    UNW_X86_64_XMM13,
+    UNW_X86_64_XMM14,
+    UNW_X86_64_XMM15,
+    UNW_TDEP_LAST_REG = UNW_X86_64_XMM15,
+#else
+    UNW_TDEP_LAST_REG = UNW_X86_64_RIP,
+#endif
+
+    /* XXX Add other regs here */
+
+    /* frame info (read-only) */
+    UNW_X86_64_CFA,
+
+    UNW_TDEP_IP = UNW_X86_64_RIP,
+    UNW_TDEP_SP = UNW_X86_64_RSP,
+    UNW_TDEP_BP = UNW_X86_64_RBP,
+    UNW_TDEP_EH = UNW_X86_64_RAX
+  }
+x86_64_regnum_t;
+
+#define UNW_TDEP_NUM_EH_REGS    2       /* XXX Not sure what this means */
+
+typedef struct unw_tdep_save_loc
+  {
+    /* Additional target-dependent info on a save location.  */
+    char unused;
+  }
+unw_tdep_save_loc_t;
+
+/* On x86_64, we can directly use ucontext_t as the unwind context.  */
+typedef ucontext_t unw_tdep_context_t;
+
+typedef struct
+  {
+    /* no x86-64-specific auxiliary proc-info */
+    char unused;
+  }
+unw_tdep_proc_info_t;
+
+#include "libunwind-dynamic.h"
+#include "libunwind-common.h"
+
+#define unw_tdep_getcontext             UNW_ARCH_OBJ(getcontext)
+#define unw_tdep_is_fpreg               UNW_ARCH_OBJ(is_fpreg)
+
+extern int unw_tdep_getcontext (unw_tdep_context_t *);
+extern int unw_tdep_is_fpreg (int);
+
+#if defined(__cplusplus) || defined(c_plusplus)
+}
+#endif
+
+#endif /* LIBUNWIND_H */
diff --git a/src/third_party/unwind/dist/include/libunwind.h b/src/third_party/unwind/dist/include/libunwind.h
new file mode 100644
index 00000000000..91bb8ef9cad
--- /dev/null
+++ b/src/third_party/unwind/dist/include/libunwind.h
@@ -0,0 +1,38 @@
+/* Provide a real file - not a symlink - as it would cause multiarch conflicts
+   when multiple different arch releases are installed simultaneously.  */
+
+#ifndef UNW_REMOTE_ONLY
+
+#if defined __aarch64__
+#include "libunwind-aarch64.h"
+#elif defined __arm__
+# include "libunwind-arm.h"
+#elif defined __hppa__
+# include "libunwind-hppa.h"
+#elif defined __ia64__
+# include "libunwind-ia64.h"
+#elif defined __mips__
+# include "libunwind-mips.h"
+#elif defined __powerpc__ && !defined __powerpc64__
+# include "libunwind-ppc32.h"
+#elif defined __powerpc64__
+# include "libunwind-ppc64.h"
+#elif defined __sh__
+# include "libunwind-sh.h"
+#elif defined __i386__
+# include "libunwind-x86.h"
+#elif defined __x86_64__
+# include "libunwind-x86_64.h"
+#elif defined __tilegx__
+# include "libunwind-tilegx.h"
+#elif defined __s390x__
+# include "libunwind-s390x.h"
+#else
+# error "Unsupported arch"
+#endif
+
+#else /* UNW_REMOTE_ONLY */
+
+# include "libunwind-x86_64.h"
+
+#endif /* UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/dist/include/libunwind.h.in b/src/third_party/unwind/dist/include/libunwind.h.in
new file mode 100644
index 00000000000..a13e7767325
--- /dev/null
+++ b/src/third_party/unwind/dist/include/libunwind.h.in
@@ -0,0 +1,38 @@
+/* Provide a real file - not a symlink - as it would cause multiarch conflicts
+   when multiple different arch releases are installed simultaneously.  */
+
+#ifndef UNW_REMOTE_ONLY
+
+#if defined __aarch64__
+#include "libunwind-aarch64.h"
+#elif defined __arm__
+# include "libunwind-arm.h"
+#elif defined __hppa__
+# include "libunwind-hppa.h"
+#elif defined __ia64__
+# include "libunwind-ia64.h"
+#elif defined __mips__
+# include "libunwind-mips.h"
+#elif defined __powerpc__ && !defined __powerpc64__
+# include "libunwind-ppc32.h"
+#elif defined __powerpc64__
+# include "libunwind-ppc64.h"
+#elif defined __sh__
+# include "libunwind-sh.h"
+#elif defined __i386__
+# include "libunwind-x86.h"
+#elif defined __x86_64__
+# include "libunwind-x86_64.h"
+#elif defined __tilegx__
+# include "libunwind-tilegx.h"
+#elif defined __s390x__
+# include "libunwind-s390x.h"
+#else
+# error "Unsupported arch"
+#endif
+
+#else /* UNW_REMOTE_ONLY */
+
+# include "libunwind-@arch@.h"
+
+#endif /* UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/dist/include/libunwind_i.h b/src/third_party/unwind/dist/include/libunwind_i.h
new file mode 100644
index 00000000000..36cf7a14de7
--- /dev/null
+++ b/src/third_party/unwind/dist/include/libunwind_i.h
@@ -0,0 +1,365 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2005 Hewlett-Packard Co
+   Copyright (C) 2007 David Mosberger-Tang
+        Contributed by David Mosberger-Tang <dmosberger@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* This files contains libunwind-internal definitions which are
+   subject to frequent change and are not to be exposed to
+   libunwind-users.  */
+
+#ifndef libunwind_i_h
+#define libunwind_i_h
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include "compiler.h"
+
+#if defined(HAVE___THREAD) && HAVE___THREAD
+#define UNWI_DEFAULT_CACHING_POLICY UNW_CACHE_PER_THREAD
+#else
+#define UNWI_DEFAULT_CACHING_POLICY UNW_CACHE_GLOBAL
+#endif
+
+/* Platform-independent libunwind-internal declarations.  */
+
+#include <sys/types.h>  /* HP-UX needs this before include of pthread.h */
+
+#include <assert.h>
+#include <libunwind.h>
+#include <pthread.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/mman.h>
+
+#if defined(HAVE_ELF_H)
+# include <elf.h>
+#elif defined(HAVE_SYS_ELF_H)
+# include <sys/elf.h>
+#else
+# error Could not locate <elf.h>
+#endif
+
+#if defined(HAVE_ENDIAN_H)
+# include <endian.h>
+#elif defined(HAVE_SYS_ENDIAN_H)
+# include <sys/endian.h>
+# if defined(_LITTLE_ENDIAN) && !defined(__LITTLE_ENDIAN)
+#   define __LITTLE_ENDIAN _LITTLE_ENDIAN
+# endif
+# if defined(_BIG_ENDIAN) && !defined(__BIG_ENDIAN)
+#   define __BIG_ENDIAN _BIG_ENDIAN
+# endif
+# if defined(_BYTE_ORDER) && !defined(__BYTE_ORDER)
+#   define __BYTE_ORDER _BYTE_ORDER
+# endif
+#else
+# define __LITTLE_ENDIAN        1234
+# define __BIG_ENDIAN           4321
+# if defined(__hpux)
+#   define __BYTE_ORDER __BIG_ENDIAN
+# elif defined(__QNX__)
+#   if defined(__BIGENDIAN__)
+#     define __BYTE_ORDER __BIG_ENDIAN
+#   elif defined(__LITTLEENDIAN__)
+#     define __BYTE_ORDER __LITTLE_ENDIAN
+#   else
+#     error Host has unknown byte-order.
+#   endif
+# else
+#   error Host has unknown byte-order.
+# endif
+#endif
+
+#if defined(HAVE__BUILTIN_UNREACHABLE)
+# define unreachable() __builtin_unreachable()
+#else
+# define unreachable() do { } while (1)
+#endif
+
+#ifdef DEBUG
+# define UNW_DEBUG      1
+#else
+# define UNW_DEBUG      0
+#endif
+
+/* Make it easy to write thread-safe code which may or may not be
+   linked against libpthread.  The macros below can be used
+   unconditionally and if -lpthread is around, they'll call the
+   corresponding routines otherwise, they do nothing.  */
+
+#pragma weak pthread_mutex_init
+#pragma weak pthread_mutex_lock
+#pragma weak pthread_mutex_unlock
+
+#define mutex_init(l)                                                   \
+        (pthread_mutex_init != NULL ? pthread_mutex_init ((l), NULL) : 0)
+#define mutex_lock(l)                                                   \
+        (pthread_mutex_lock != NULL ? pthread_mutex_lock (l) : 0)
+#define mutex_unlock(l)                                                 \
+        (pthread_mutex_unlock != NULL ? pthread_mutex_unlock (l) : 0)
+
+#ifdef HAVE_ATOMIC_OPS_H
+# include <atomic_ops.h>
+static inline int
+cmpxchg_ptr (void *addr, void *old, void *new)
+{
+  union
+    {
+      void *vp;
+      AO_t *aop;
+    }
+  u;
+
+  u.vp = addr;
+  return AO_compare_and_swap(u.aop, (AO_t) old, (AO_t) new);
+}
+# define fetch_and_add1(_ptr)           AO_fetch_and_add1(_ptr)
+# define fetch_and_add(_ptr, value)     AO_fetch_and_add(_ptr, value)
+   /* GCC 3.2.0 on HP-UX crashes on cmpxchg_ptr() */
+#  if !(defined(__hpux) && __GNUC__ == 3 && __GNUC_MINOR__ == 2)
+#   define HAVE_CMPXCHG
+#  endif
+# define HAVE_FETCH_AND_ADD
+#elif defined(HAVE_SYNC_ATOMICS) || defined(HAVE_IA64INTRIN_H)
+# ifdef HAVE_IA64INTRIN_H
+#  include <ia64intrin.h>
+# endif
+static inline int
+cmpxchg_ptr (void *addr, void *old, void *new)
+{
+  union
+    {
+      void *vp;
+      long *vlp;
+    }
+  u;
+
+  u.vp = addr;
+  return __sync_bool_compare_and_swap(u.vlp, (long) old, (long) new);
+}
+# define fetch_and_add1(_ptr)           __sync_fetch_and_add(_ptr, 1)
+# define fetch_and_add(_ptr, value)     __sync_fetch_and_add(_ptr, value)
+# define HAVE_CMPXCHG
+# define HAVE_FETCH_AND_ADD
+#endif
+#define atomic_read(ptr)        (*(ptr))
+
+#define UNWI_OBJ(fn)      UNW_PASTE(UNW_PREFIX,UNW_PASTE(I,fn))
+#define UNWI_ARCH_OBJ(fn) UNW_PASTE(UNW_PASTE(UNW_PASTE(_UI,UNW_TARGET),_), fn)
+
+#define unwi_full_mask    UNWI_ARCH_OBJ(full_mask)
+
+/* Type of a mask that can be used to inhibit preemption.  At the
+   userlevel, preemption is caused by signals and hence sigset_t is
+   appropriate.  In constrast, the Linux kernel uses "unsigned long"
+   to hold the processor "flags" instead.  */
+typedef sigset_t intrmask_t;
+
+extern intrmask_t unwi_full_mask;
+
+/* Silence compiler warnings about variables which are used only if libunwind
+   is configured in a certain way */
+static inline void mark_as_used(void *v UNUSED) {
+}
+
+#if defined(CONFIG_BLOCK_SIGNALS)
+# define SIGPROCMASK(how, new_mask, old_mask) \
+  sigprocmask((how), (new_mask), (old_mask))
+#else
+# define SIGPROCMASK(how, new_mask, old_mask) mark_as_used(old_mask)
+#endif
+
+/* Prefer adaptive mutexes if available */
+#ifdef PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
+#define UNW_PTHREAD_MUTEX_INITIALIZER PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
+#else
+#define UNW_PTHREAD_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER
+#endif
+
+#define define_lock(name) \
+  pthread_mutex_t name = UNW_PTHREAD_MUTEX_INITIALIZER
+#define lock_init(l)            mutex_init (l)
+#define lock_acquire(l,m)                               \
+do {                                                    \
+  SIGPROCMASK (SIG_SETMASK, &unwi_full_mask, &(m));     \
+  mutex_lock (l);                                       \
+} while (0)
+#define lock_release(l,m)                       \
+do {                                            \
+  mutex_unlock (l);                             \
+  SIGPROCMASK (SIG_SETMASK, &(m), NULL);        \
+} while (0)
+
+#define SOS_MEMORY_SIZE 16384   /* see src/mi/mempool.c */
+
+#ifndef MAP_ANONYMOUS
+# define MAP_ANONYMOUS MAP_ANON
+#endif
+#define GET_MEMORY(mem, size)                                               \
+do {                                                                        \
+  /* Hopefully, mmap() goes straight through to a system call stub...  */   \
+  mem = mmap (NULL, size, PROT_READ | PROT_WRITE,                           \
+              MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);                          \
+  if (mem == MAP_FAILED)                                                    \
+    mem = NULL;                                                             \
+} while (0)
+
+#define unwi_find_dynamic_proc_info     UNWI_OBJ(find_dynamic_proc_info)
+#define unwi_extract_dynamic_proc_info  UNWI_OBJ(extract_dynamic_proc_info)
+#define unwi_put_dynamic_unwind_info    UNWI_OBJ(put_dynamic_unwind_info)
+#define unwi_dyn_remote_find_proc_info  UNWI_OBJ(dyn_remote_find_proc_info)
+#define unwi_dyn_remote_put_unwind_info UNWI_OBJ(dyn_remote_put_unwind_info)
+#define unwi_dyn_validate_cache         UNWI_OBJ(dyn_validate_cache)
+
+extern int unwi_find_dynamic_proc_info (unw_addr_space_t as,
+                                        unw_word_t ip,
+                                        unw_proc_info_t *pi,
+                                        int need_unwind_info, void *arg);
+extern int unwi_extract_dynamic_proc_info (unw_addr_space_t as,
+                                           unw_word_t ip,
+                                           unw_proc_info_t *pi,
+                                           unw_dyn_info_t *di,
+                                           int need_unwind_info,
+                                           void *arg);
+extern void unwi_put_dynamic_unwind_info (unw_addr_space_t as,
+                                          unw_proc_info_t *pi, void *arg);
+
+/* These handle the remote (cross-address-space) case of accessing
+   dynamic unwind info. */
+
+extern int unwi_dyn_remote_find_proc_info (unw_addr_space_t as,
+                                           unw_word_t ip,
+                                           unw_proc_info_t *pi,
+                                           int need_unwind_info,
+                                           void *arg);
+extern void unwi_dyn_remote_put_unwind_info (unw_addr_space_t as,
+                                             unw_proc_info_t *pi,
+                                             void *arg);
+extern int unwi_dyn_validate_cache (unw_addr_space_t as, void *arg);
+
+extern unw_dyn_info_list_t _U_dyn_info_list;
+extern pthread_mutex_t _U_dyn_info_list_lock;
+
+#if UNW_DEBUG
+#define unwi_debug_level                UNWI_ARCH_OBJ(debug_level)
+extern long unwi_debug_level;
+
+# include <stdio.h>
+# define Debug(level,format...)                                         \
+do {                                                                    \
+  if (unwi_debug_level >= level)                                        \
+    {                                                                   \
+      int _n = level;                                                   \
+      if (_n > 16)                                                      \
+        _n = 16;                                                        \
+      fprintf (stderr, "%*c>%s: ", _n, ' ', __FUNCTION__);              \
+      fprintf (stderr, format);                                         \
+    }                                                                   \
+} while (0)
+# define Dprintf(format...)         fprintf (stderr, format)
+#else
+# define Debug(level,format...)
+# define Dprintf(format...)
+#endif
+
+static ALWAYS_INLINE int
+print_error (const char *string)
+{
+  return write (2, string, strlen (string));
+}
+
+#define mi_init         UNWI_ARCH_OBJ(mi_init)
+
+extern void mi_init (void);     /* machine-independent initializations */
+extern unw_word_t _U_dyn_info_list_addr (void);
+
+/* This is needed/used by ELF targets only.  */
+
+struct elf_image
+  {
+    void *image;                /* pointer to mmap'd image */
+    size_t size;                /* (file-) size of the image */
+  };
+
+struct elf_dyn_info
+  {
+    struct elf_image ei;
+    unw_dyn_info_t di_cache;
+    unw_dyn_info_t di_debug;    /* additional table info for .debug_frame */
+#if UNW_TARGET_IA64
+    unw_dyn_info_t ktab;
+#endif
+#if UNW_TARGET_ARM
+    unw_dyn_info_t di_arm;      /* additional table info for .ARM.exidx */
+#endif
+  };
+
+static inline void invalidate_edi (struct elf_dyn_info *edi)
+{
+  if (edi->ei.image)
+    munmap (edi->ei.image, edi->ei.size);
+  memset (edi, 0, sizeof (*edi));
+  edi->di_cache.format = -1;
+  edi->di_debug.format = -1;
+#if UNW_TARGET_ARM
+  edi->di_arm.format = -1;
+#endif
+}
+
+
+/* Provide a place holder for architecture to override for fast access
+   to memory when known not to need to validate and know the access
+   will be local to the process. A suitable override will improve
+   unw_tdep_trace() performance in particular. */
+#define ACCESS_MEM_FAST(ret,validate,cur,addr,to) \
+  do { (ret) = dwarf_get ((cur), DWARF_MEM_LOC ((cur), (addr)), &(to)); } \
+  while (0)
+
+/* Define GNU and processor specific values for the Phdr p_type field in case
+   they aren't defined by <elf.h>.  */
+#ifndef PT_GNU_EH_FRAME
+# define PT_GNU_EH_FRAME        0x6474e550
+#endif /* !PT_GNU_EH_FRAME */
+#ifndef PT_ARM_EXIDX
+# define PT_ARM_EXIDX           0x70000001      /* ARM unwind segment */
+#endif /* !PT_ARM_EXIDX */
+
+#include "tdep/libunwind_i.h"
+
+#ifndef tdep_get_func_addr
+# define tdep_get_func_addr(as,addr,v)          (*(v) = addr, 0)
+#endif
+
+#ifndef DWARF_VAL_LOC
+# define DWARF_IS_VAL_LOC(l)    0
+# define DWARF_VAL_LOC(c,v)     DWARF_NULL_LOC
+#endif
+
+#define UNW_ALIGN(x,a) (((x)+(a)-1UL)&~((a)-1UL))
+
+#endif /* libunwind_i_h */
diff --git a/src/third_party/unwind/dist/include/mempool.h b/src/third_party/unwind/dist/include/mempool.h
new file mode 100644
index 00000000000..1f1c7700993
--- /dev/null
+++ b/src/third_party/unwind/dist/include/mempool.h
@@ -0,0 +1,89 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002-2003 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef mempool_h
+#define mempool_h
+
+/* Memory pools provide simple memory management of fixed-size
+   objects.  Memory pools are used for two purposes:
+
+     o To ensure a stack can be unwound even when a process
+       is out of memory.
+
+      o To ensure a stack can be unwound at any time in a
+        multi-threaded process (e.g., even at a time when the normal
+        malloc-lock is taken, possibly by the very thread that is
+        being unwind).
+
+
+    To achieve the second objective, memory pools allocate memory
+    directly via mmap() system call (or an equivalent facility).
+
+    The first objective is accomplished by reserving memory ahead of
+    time.  Since the memory requirements of stack unwinding generally
+    depends on the complexity of the procedures being unwind, there is
+    no absolute guarantee that unwinding will always work, but in
+    practice, this should not be a serious problem.  */
+
+#include <sys/types.h>
+
+#include "libunwind_i.h"
+
+#define sos_alloc(s)            UNWI_ARCH_OBJ(_sos_alloc)(s)
+#define mempool_init(p,s,r)     UNWI_ARCH_OBJ(_mempool_init)(p,s,r)
+#define mempool_alloc(p)        UNWI_ARCH_OBJ(_mempool_alloc)(p)
+#define mempool_free(p,o)       UNWI_ARCH_OBJ(_mempool_free)(p,o)
+
+/* The mempool structure should be treated as an opaque object.  It's
+   declared here only to enable static allocation of mempools.  */
+struct mempool
+  {
+    pthread_mutex_t lock;
+    size_t obj_size;            /* object size (rounded up for alignment) */
+    size_t chunk_size;          /* allocation granularity */
+    unsigned int reserve;       /* minimum (desired) size of the free-list */
+    unsigned int num_free;      /* number of objects on the free-list */
+    struct object
+      {
+        struct object *next;
+      }
+    *free_list;
+  };
+
+/* Emergency allocation for one-time stuff that doesn't fit the memory
+   pool model.  A limited amount of memory is available in this
+   fashion and once allocated, there is no way to free it.  */
+extern void *sos_alloc (size_t size);
+
+/* Initialize POOL for an object size of OBJECT_SIZE bytes.  RESERVE
+   is the number of objects that should be reserved for use under
+   tight memory situations.  If it is zero, mempool attempts to pick a
+   reasonable default value.  */
+extern void mempool_init (struct mempool *pool,
+                          size_t obj_size, size_t reserve);
+extern void *mempool_alloc (struct mempool *pool);
+extern void mempool_free (struct mempool *pool, void *object);
+
+#endif /* mempool_h */
diff --git a/src/third_party/unwind/dist/include/remote.h b/src/third_party/unwind/dist/include/remote.h
new file mode 100644
index 00000000000..064d6309adb
--- /dev/null
+++ b/src/third_party/unwind/dist/include/remote.h
@@ -0,0 +1,129 @@
+#ifndef REMOTE_H
+#define REMOTE_H
+
+/* Helper functions for accessing (remote) memory.  These functions
+   assume that all addresses are naturally aligned (e.g., 32-bit
+   quantity is stored at a 32-bit-aligned address.  */
+
+#ifdef UNW_LOCAL_ONLY
+
+static inline int
+fetch8 (unw_addr_space_t as, unw_accessors_t *a,
+        unw_word_t *addr, int8_t *valp, void *arg)
+{
+  *valp = *(int8_t *) (uintptr_t) *addr;
+  *addr += 1;
+  return 0;
+}
+
+static inline int
+fetch16 (unw_addr_space_t as, unw_accessors_t *a,
+         unw_word_t *addr, int16_t *valp, void *arg)
+{
+  *valp = *(int16_t *) (uintptr_t) *addr;
+  *addr += 2;
+  return 0;
+}
+
+static inline int
+fetch32 (unw_addr_space_t as, unw_accessors_t *a,
+         unw_word_t *addr, int32_t *valp, void *arg)
+{
+  *valp = *(int32_t *) (uintptr_t) *addr;
+  *addr += 4;
+  return 0;
+}
+
+static inline int
+fetchw (unw_addr_space_t as, unw_accessors_t *a,
+        unw_word_t *addr, unw_word_t *valp, void *arg)
+{
+  *valp = *(unw_word_t *) (uintptr_t) *addr;
+  *addr += sizeof (unw_word_t);
+  return 0;
+}
+
+#else /* !UNW_LOCAL_ONLY */
+
+#define WSIZE   (sizeof (unw_word_t))
+
+static inline int
+fetch8 (unw_addr_space_t as, unw_accessors_t *a,
+        unw_word_t *addr, int8_t *valp, void *arg)
+{
+  unw_word_t val, aligned_addr = *addr & -WSIZE, off = *addr - aligned_addr;
+  int ret;
+
+  *addr += 1;
+
+  ret = (*a->access_mem) (as, aligned_addr, &val, 0, arg);
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+  val >>= 8*off;
+#else
+  val >>= 8*(WSIZE - 1 - off);
+#endif
+  *valp = val & 0xff;
+  return ret;
+}
+
+static inline int
+fetch16 (unw_addr_space_t as, unw_accessors_t *a,
+         unw_word_t *addr, int16_t *valp, void *arg)
+{
+  unw_word_t val, aligned_addr = *addr & -WSIZE, off = *addr - aligned_addr;
+  int ret;
+
+  if ((off & 0x1) != 0)
+    return -UNW_EINVAL;
+
+  *addr += 2;
+
+  ret = (*a->access_mem) (as, aligned_addr, &val, 0, arg);
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+  val >>= 8*off;
+#else
+  val >>= 8*(WSIZE - 2 - off);
+#endif
+  *valp = val & 0xffff;
+  return ret;
+}
+
+static inline int
+fetch32 (unw_addr_space_t as, unw_accessors_t *a,
+         unw_word_t *addr, int32_t *valp, void *arg)
+{
+  unw_word_t val, aligned_addr = *addr & -WSIZE, off = *addr - aligned_addr;
+  int ret;
+
+  if ((off & 0x3) != 0)
+    return -UNW_EINVAL;
+
+  *addr += 4;
+
+  ret = (*a->access_mem) (as, aligned_addr, &val, 0, arg);
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+  val >>= 8*off;
+#else
+  val >>= 8*(WSIZE - 4 - off);
+#endif
+  *valp = val & 0xffffffff;
+  return ret;
+}
+
+static inline int
+fetchw (unw_addr_space_t as, unw_accessors_t *a,
+        unw_word_t *addr, unw_word_t *valp, void *arg)
+{
+  int ret;
+
+  ret = (*a->access_mem) (as, *addr, valp, 0, arg);
+  *addr += WSIZE;
+  return ret;
+}
+
+#endif /* !UNW_LOCAL_ONLY */
+
+#endif /* REMOTE_H */
diff --git a/src/third_party/unwind/dist/include/tdep-aarch64/dwarf-config.h b/src/third_party/unwind/dist/include/tdep-aarch64/dwarf-config.h
new file mode 100644
index 00000000000..f65db17ee65
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-aarch64/dwarf-config.h
@@ -0,0 +1,52 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+   Copyright (C) 2013 Linaro Limited
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef dwarf_config_h
+#define dwarf_config_h
+
+/* This matches the value udes by GCC (see
+   gcc/config/aarch64/aarch64.h:DWARF_FRAME_REGISTERS.  */
+#define DWARF_NUM_PRESERVED_REGS        97
+
+/* Return TRUE if the ADDR_SPACE uses big-endian byte-order.  */
+#define dwarf_is_big_endian(addr_space) 0
+
+#define dwarf_to_unw_regnum(reg) (((reg) <= UNW_AARCH64_V31) ? (reg) : 0)
+
+/* Convert a pointer to a dwarf_cursor structure to a pointer to
+   unw_cursor_t.  */
+#define dwarf_to_cursor(c)      ((unw_cursor_t *) (c))
+
+typedef struct dwarf_loc
+  {
+    unw_word_t val;
+#ifndef UNW_LOCAL_ONLY
+    unw_word_t type;            /* see DWARF_LOC_TYPE_* macros.  */
+#endif
+  }
+dwarf_loc_t;
+
+#endif /* dwarf_config_h */
diff --git a/src/third_party/unwind/dist/include/tdep-aarch64/jmpbuf.h b/src/third_party/unwind/dist/include/tdep-aarch64/jmpbuf.h
new file mode 100644
index 00000000000..3f01a442baf
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-aarch64/jmpbuf.h
@@ -0,0 +1,33 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2013 Linaro Limited
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* Use glibc's jump-buffer indices; NPTL peeks at SP: */
+
+/* FIXME for AArch64  */
+
+#define JB_SP           13
+#define JB_RP           14
+#define JB_MASK_SAVED   15
+#define JB_MASK         16
diff --git a/src/third_party/unwind/dist/include/tdep-aarch64/libunwind_i.h b/src/third_party/unwind/dist/include/tdep-aarch64/libunwind_i.h
new file mode 100644
index 00000000000..b91273fa1c5
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-aarch64/libunwind_i.h
@@ -0,0 +1,320 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+   Copyright (C) 2013 Linaro Limited
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef AARCH64_LIBUNWIND_I_H
+#define AARCH64_LIBUNWIND_I_H
+
+/* Target-dependent definitions that are internal to libunwind but need
+   to be shared with target-independent code.  */
+
+#include <stdlib.h>
+#include <libunwind.h>
+
+#include "elf64.h"
+#include "mempool.h"
+#include "dwarf.h"
+
+typedef enum
+  {
+    UNW_AARCH64_FRAME_STANDARD = -2,     /* regular fp, sp +/- offset */
+    UNW_AARCH64_FRAME_SIGRETURN = -1,    /* special sigreturn frame */
+    UNW_AARCH64_FRAME_OTHER = 0,         /* not cacheable (special or unrecognised) */
+    UNW_AARCH64_FRAME_GUESSED = 1        /* guessed it was regular, but not known */
+  }
+unw_tdep_frame_type_t;
+
+typedef struct
+  {
+    uint64_t virtual_address;
+    int64_t frame_type     : 2;  /* unw_tdep_frame_type_t classification */
+    int64_t last_frame     : 1;  /* non-zero if last frame in chain */
+    int64_t cfa_reg_sp     : 1;  /* cfa dwarf base register is sp vs. fp */
+    int64_t cfa_reg_offset : 30; /* cfa is at this offset from base register value */
+    int64_t fp_cfa_offset  : 30; /* fp saved at this offset from cfa (-1 = not saved) */
+    int64_t lr_cfa_offset  : 30; /* lr saved at this offset from cfa (-1 = not saved) */
+    int64_t sp_cfa_offset  : 30; /* sp saved at this offset from cfa (-1 = not saved) */
+  }
+unw_tdep_frame_t;
+
+#ifdef UNW_LOCAL_ONLY
+
+typedef unw_word_t aarch64_loc_t;
+
+#else /* !UNW_LOCAL_ONLY */
+
+typedef struct aarch64_loc
+  {
+    unw_word_t w0, w1;
+  }
+aarch64_loc_t;
+
+#endif /* !UNW_LOCAL_ONLY */
+
+struct unw_addr_space
+  {
+    struct unw_accessors acc;
+    int big_endian;
+    unw_caching_policy_t caching_policy;
+#ifdef HAVE_ATOMIC_OPS_H
+    AO_t cache_generation;
+#else
+    uint32_t cache_generation;
+#endif
+    unw_word_t dyn_generation;          /* see dyn-common.h */
+    unw_word_t dyn_info_list_addr;      /* (cached) dyn_info_list_addr */
+    struct dwarf_rs_cache global_cache;
+    struct unw_debug_frame_list *debug_frames;
+   };
+
+struct cursor
+  {
+    struct dwarf_cursor dwarf;          /* must be first */
+
+    unw_tdep_frame_t frame_info;        /* quick tracing assist info */
+
+    enum
+      {
+        AARCH64_SCF_NONE,
+        AARCH64_SCF_LINUX_RT_SIGFRAME,
+      }
+    sigcontext_format;
+    unw_word_t sigcontext_addr;
+    unw_word_t sigcontext_sp;
+    unw_word_t sigcontext_pc;
+    int validate;
+  };
+
+#define DWARF_GET_LOC(l)        ((l).val)
+
+#ifdef UNW_LOCAL_ONLY
+# define DWARF_NULL_LOC         DWARF_LOC (0, 0)
+# define DWARF_IS_NULL_LOC(l)   (DWARF_GET_LOC (l) == 0)
+# define DWARF_LOC(r, t)        ((dwarf_loc_t) { .val = (r) })
+# define DWARF_IS_REG_LOC(l)    0
+# define DWARF_REG_LOC(c,r)     (DWARF_LOC((unw_word_t)                      \
+                                 tdep_uc_addr((c)->as_arg, (r)), 0))
+# define DWARF_MEM_LOC(c,m)     DWARF_LOC ((m), 0)
+# define DWARF_FPREG_LOC(c,r)   (DWARF_LOC((unw_word_t)                      \
+                                 tdep_uc_addr((c)->as_arg, (r)), 0))
+
+static inline int
+dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val)
+{
+  if (!DWARF_GET_LOC (loc))
+    return -1;
+  *val = *(unw_fpreg_t *) DWARF_GET_LOC (loc);
+  return 0;
+}
+
+static inline int
+dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
+{
+  if (!DWARF_GET_LOC (loc))
+    return -1;
+  *(unw_fpreg_t *) DWARF_GET_LOC (loc) = val;
+  return 0;
+}
+
+static inline int
+dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val)
+{
+  if (!DWARF_GET_LOC (loc))
+    return -1;
+  *val = *(unw_word_t *) DWARF_GET_LOC (loc);
+  return 0;
+}
+
+static inline int
+dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
+{
+  if (!DWARF_GET_LOC (loc))
+    return -1;
+  *(unw_word_t *) DWARF_GET_LOC (loc) = val;
+  return 0;
+}
+
+#else /* !UNW_LOCAL_ONLY */
+# define DWARF_LOC_TYPE_FP      (1 << 0)
+# define DWARF_LOC_TYPE_REG     (1 << 1)
+# define DWARF_NULL_LOC         DWARF_LOC (0, 0)
+# define DWARF_IS_NULL_LOC(l)                                           \
+                ({ dwarf_loc_t _l = (l); _l.val == 0 && _l.type == 0; })
+# define DWARF_LOC(r, t)        ((dwarf_loc_t) { .val = (r), .type = (t) })
+# define DWARF_IS_REG_LOC(l)    (((l).type & DWARF_LOC_TYPE_REG) != 0)
+# define DWARF_IS_FP_LOC(l)     (((l).type & DWARF_LOC_TYPE_FP) != 0)
+# define DWARF_REG_LOC(c,r)     DWARF_LOC((r), DWARF_LOC_TYPE_REG)
+# define DWARF_MEM_LOC(c,m)     DWARF_LOC ((m), 0)
+# define DWARF_FPREG_LOC(c,r)   DWARF_LOC((r), (DWARF_LOC_TYPE_REG      \
+                                                | DWARF_LOC_TYPE_FP))
+
+static inline int
+dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val)
+{
+  char *valp = (char *) &val;
+  unw_word_t addr;
+  int ret;
+
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
+                                       val, 0, c->as_arg);
+
+  addr = DWARF_GET_LOC (loc);
+  if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, (unw_word_t *) valp,
+                                       0, c->as_arg)) < 0)
+    return ret;
+
+  return (*c->as->acc.access_mem) (c->as, addr + 4, (unw_word_t *) valp + 1, 0,
+                                   c->as_arg);
+}
+
+static inline int
+dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
+{
+  char *valp = (char *) &val;
+  unw_word_t addr;
+  int ret;
+
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
+                                       &val, 1, c->as_arg);
+
+  addr = DWARF_GET_LOC (loc);
+  if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, (unw_word_t *) valp,
+                                       1, c->as_arg)) < 0)
+    return ret;
+
+  return (*c->as->acc.access_mem) (c->as, addr + 4, (unw_word_t *) valp + 1,
+                                   1, c->as_arg);
+}
+
+static inline int
+dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val)
+{
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  /* If a code-generator were to save a value of type unw_word_t in a
+     floating-point register, we would have to support this case.  I
+     suppose it could happen with MMX registers, but does it really
+     happen?  */
+  assert (!DWARF_IS_FP_LOC (loc));
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), val,
+                                     0, c->as_arg);
+  else
+    return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), val,
+                                     0, c->as_arg);
+}
+
+static inline int
+dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
+{
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  /* If a code-generator were to save a value of type unw_word_t in a
+     floating-point register, we would have to support this case.  I
+     suppose it could happen with MMX registers, but does it really
+     happen?  */
+  assert (!DWARF_IS_FP_LOC (loc));
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), &val,
+                                     1, c->as_arg);
+  else
+    return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), &val,
+                                     1, c->as_arg);
+}
+
+#endif /* !UNW_LOCAL_ONLY */
+
+
+
+#define tdep_getcontext_trace           UNW_ARCH_OBJ(getcontext_trace)
+#define tdep_init_done                  UNW_OBJ(init_done)
+#define tdep_init                       UNW_OBJ(init)
+/* Platforms that support UNW_INFO_FORMAT_TABLE need to define
+   tdep_search_unwind_table.  */
+#define tdep_search_unwind_table        dwarf_search_unwind_table
+#define tdep_find_unwind_table          dwarf_find_unwind_table
+#define tdep_uc_addr                    UNW_OBJ(uc_addr)
+#define tdep_get_elf_image              UNW_ARCH_OBJ(get_elf_image)
+#define tdep_get_exe_image_path         UNW_ARCH_OBJ(get_exe_image_path)
+#define tdep_access_reg                 UNW_OBJ(access_reg)
+#define tdep_access_fpreg               UNW_OBJ(access_fpreg)
+#define tdep_fetch_frame(c,ip,n)        do {} while(0)
+#define tdep_cache_frame(c)             0
+#define tdep_reuse_frame(c,frame)       do {} while(0)
+#define tdep_stash_frame                UNW_OBJ(tdep_stash_frame)
+#define tdep_trace                      UNW_OBJ(tdep_trace)
+
+#ifdef UNW_LOCAL_ONLY
+# define tdep_find_proc_info(c,ip,n)                            \
+        dwarf_find_proc_info((c)->as, (ip), &(c)->pi, (n),      \
+                                       (c)->as_arg)
+# define tdep_put_unwind_info(as,pi,arg)                \
+        dwarf_put_unwind_info((as), (pi), (arg))
+#else
+# define tdep_find_proc_info(c,ip,n)                                    \
+        (*(c)->as->acc.find_proc_info)((c)->as, (ip), &(c)->pi, (n),    \
+                                       (c)->as_arg)
+# define tdep_put_unwind_info(as,pi,arg)                \
+        (*(as)->acc.put_unwind_info)((as), (pi), (arg))
+#endif
+
+#define tdep_get_as(c)                  ((c)->dwarf.as)
+#define tdep_get_as_arg(c)              ((c)->dwarf.as_arg)
+#define tdep_get_ip(c)                  ((c)->dwarf.ip)
+#define tdep_big_endian(as)             ((as)->big_endian)
+
+extern int tdep_init_done;
+
+extern void tdep_init (void);
+extern int tdep_search_unwind_table (unw_addr_space_t as, unw_word_t ip,
+                                     unw_dyn_info_t *di, unw_proc_info_t *pi,
+                                     int need_unwind_info, void *arg);
+extern void *tdep_uc_addr (unw_tdep_context_t *uc, int reg);
+extern int tdep_get_elf_image (struct elf_image *ei, pid_t pid, unw_word_t ip,
+                               unsigned long *segbase, unsigned long *mapoff,
+                               char *path, size_t pathlen);
+extern void tdep_get_exe_image_path (char *path);
+extern int tdep_access_reg (struct cursor *c, unw_regnum_t reg,
+                            unw_word_t *valp, int write);
+extern int tdep_access_fpreg (struct cursor *c, unw_regnum_t reg,
+                              unw_fpreg_t *valp, int write);
+extern int tdep_trace (unw_cursor_t *cursor, void **addresses, int *n);
+extern void tdep_stash_frame (struct dwarf_cursor *c,
+                              struct dwarf_reg_state *rs);
+extern int tdep_getcontext_trace (unw_tdep_context_t *);
+
+#endif /* AARCH64_LIBUNWIND_I_H */
diff --git a/src/third_party/unwind/dist/include/tdep-arm/dwarf-config.h b/src/third_party/unwind/dist/include/tdep-arm/dwarf-config.h
new file mode 100644
index 00000000000..f50228975ec
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-arm/dwarf-config.h
@@ -0,0 +1,51 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef dwarf_config_h
+#define dwarf_config_h
+
+/* This is FIRST_PSEUDO_REGISTER in GCC, since DWARF_FRAME_REGISTERS is not
+   explicitly defined.  */
+#define DWARF_NUM_PRESERVED_REGS        128
+
+#define dwarf_to_unw_regnum(reg) (((reg) < 16) ? (reg) : 0)
+
+/* Return TRUE if the ADDR_SPACE uses big-endian byte-order.  */
+#define dwarf_is_big_endian(addr_space) 0
+
+/* Convert a pointer to a dwarf_cursor structure to a pointer to
+   unw_cursor_t.  */
+#define dwarf_to_cursor(c)      ((unw_cursor_t *) (c))
+
+typedef struct dwarf_loc
+  {
+    unw_word_t val;
+#ifndef UNW_LOCAL_ONLY
+    unw_word_t type;            /* see DWARF_LOC_TYPE_* macros.  */
+#endif
+  }
+dwarf_loc_t;
+
+#endif /* dwarf_config_h */
diff --git a/src/third_party/unwind/dist/include/tdep-arm/ex_tables.h b/src/third_party/unwind/dist/include/tdep-arm/ex_tables.h
new file mode 100644
index 00000000000..9df5e0a9fa4
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-arm/ex_tables.h
@@ -0,0 +1,55 @@
+/* libunwind - a platform-independent unwind library
+   Copyright 2011 Linaro Limited
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef ARM_EX_TABLES_H
+#define ARM_EX_TABLES_H
+
+typedef enum arm_exbuf_cmd {
+  ARM_EXIDX_CMD_FINISH,
+  ARM_EXIDX_CMD_DATA_PUSH,
+  ARM_EXIDX_CMD_DATA_POP,
+  ARM_EXIDX_CMD_REG_POP,
+  ARM_EXIDX_CMD_REG_TO_SP,
+  ARM_EXIDX_CMD_VFP_POP,
+  ARM_EXIDX_CMD_WREG_POP,
+  ARM_EXIDX_CMD_WCGR_POP,
+  ARM_EXIDX_CMD_RESERVED,
+  ARM_EXIDX_CMD_REFUSED,
+} arm_exbuf_cmd_t;
+
+struct arm_exbuf_data
+{
+  arm_exbuf_cmd_t cmd;
+  uint32_t data;
+};
+
+#define arm_exidx_extract       UNW_OBJ(arm_exidx_extract)
+#define arm_exidx_decode        UNW_OBJ(arm_exidx_decode)
+#define arm_exidx_apply_cmd     UNW_OBJ(arm_exidx_apply_cmd)
+
+int arm_exidx_extract (struct dwarf_cursor *c, uint8_t *buf);
+int arm_exidx_decode (const uint8_t *buf, uint8_t len, struct dwarf_cursor *c);
+int arm_exidx_apply_cmd (struct arm_exbuf_data *edata, struct dwarf_cursor *c);
+
+#endif // ARM_EX_TABLES_H
diff --git a/src/third_party/unwind/dist/include/tdep-arm/jmpbuf.h b/src/third_party/unwind/dist/include/tdep-arm/jmpbuf.h
new file mode 100644
index 00000000000..008e77f7960
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-arm/jmpbuf.h
@@ -0,0 +1,32 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* Use glibc's jump-buffer indices; NPTL peeks at SP: */
+
+/* FIXME for ARM!  */
+
+#define JB_SP           4
+#define JB_RP           5
+#define JB_MASK_SAVED   6
+#define JB_MASK         7
diff --git a/src/third_party/unwind/dist/include/tdep-arm/libunwind_i.h b/src/third_party/unwind/dist/include/tdep-arm/libunwind_i.h
new file mode 100644
index 00000000000..2602f41c4f7
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-arm/libunwind_i.h
@@ -0,0 +1,326 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef ARM_LIBUNWIND_I_H
+#define ARM_LIBUNWIND_I_H
+
+/* Target-dependent definitions that are internal to libunwind but need
+   to be shared with target-independent code.  */
+
+#include <stdlib.h>
+#include <libunwind.h>
+
+#include "elf32.h"
+#include "mempool.h"
+#include "dwarf.h"
+#include "ex_tables.h"
+
+typedef enum
+  {
+    UNW_ARM_FRAME_SYSCALL = -3,      /* r7 saved in r12, sp offset zero */
+    UNW_ARM_FRAME_STANDARD = -2,     /* regular r7, sp +/- offset */
+    UNW_ARM_FRAME_SIGRETURN = -1,    /* special sigreturn frame */
+    UNW_ARM_FRAME_OTHER = 0,         /* not cacheable (special or unrecognised) */
+    UNW_ARM_FRAME_GUESSED = 1        /* guessed it was regular, but not known */
+  }
+unw_tdep_frame_type_t;
+
+typedef struct
+  {
+    uint32_t virtual_address;
+    int32_t frame_type     : 3;  /* unw_tdep_frame_type_t classification */
+    int32_t last_frame     : 1;  /* non-zero if last frame in chain */
+    int32_t cfa_reg_sp     : 1;  /* cfa dwarf base register is sp vs. r7 */
+    int32_t cfa_reg_offset : 30; /* cfa is at this offset from base register value */
+    int32_t r7_cfa_offset  : 30; /* r7 saved at this offset from cfa (-1 = not saved) */
+    int32_t lr_cfa_offset  : 30; /* lr saved at this offset from cfa (-1 = not saved) */
+    int32_t sp_cfa_offset  : 30; /* sp saved at this offset from cfa (-1 = not saved) */
+  }
+unw_tdep_frame_t;
+
+struct unw_addr_space
+  {
+    struct unw_accessors acc;
+    int big_endian;
+    unw_caching_policy_t caching_policy;
+#ifdef HAVE_ATOMIC_OPS_H
+    AO_t cache_generation;
+#else
+    uint32_t cache_generation;
+#endif
+    unw_word_t dyn_generation;          /* see dyn-common.h */
+    unw_word_t dyn_info_list_addr;      /* (cached) dyn_info_list_addr */
+    struct dwarf_rs_cache global_cache;
+    struct unw_debug_frame_list *debug_frames;
+  };
+
+struct cursor
+  {
+    struct dwarf_cursor dwarf;          /* must be first */
+
+    unw_tdep_frame_t frame_info;        /* quick tracing assist info */
+
+    enum
+      {
+        ARM_SCF_NONE,                   /* no signal frame */
+        ARM_SCF_LINUX_SIGFRAME,         /* non-RT signal frame, kernel >=2.6.18 */
+        ARM_SCF_LINUX_RT_SIGFRAME,      /* RT signal frame, kernel >=2.6.18 */
+        ARM_SCF_LINUX_OLD_SIGFRAME,     /* non-RT signal frame, kernel < 2.6.18 */
+        ARM_SCF_LINUX_OLD_RT_SIGFRAME,  /* RT signal frame, kernel < 2.6.18 */
+        ARM_SCF_FREEBSD_SIGFRAME,	/* FreeBSD sigframe */
+	ARM_SCF_FREEBSD_SYSCALL,	/* FreeBSD syscall stub */
+      }
+    sigcontext_format;
+    unw_word_t sigcontext_addr;
+    unw_word_t sigcontext_sp;
+    unw_word_t sigcontext_pc;
+    int validate;
+  };
+
+#define DWARF_GET_LOC(l)        ((l).val)
+
+#ifdef UNW_LOCAL_ONLY
+# define DWARF_NULL_LOC         DWARF_LOC (0, 0)
+# define DWARF_IS_NULL_LOC(l)   (DWARF_GET_LOC (l) == 0)
+# define DWARF_LOC(r, t)        ((dwarf_loc_t) { .val = (r) })
+# define DWARF_IS_REG_LOC(l)    0
+# define DWARF_REG_LOC(c,r)     (DWARF_LOC((unw_word_t)                      \
+                                 tdep_uc_addr((c)->as_arg, (r)), 0))
+# define DWARF_MEM_LOC(c,m)     DWARF_LOC ((m), 0)
+# define DWARF_FPREG_LOC(c,r)   (DWARF_LOC((unw_word_t)                      \
+                                 tdep_uc_addr((c)->as_arg, (r)), 0))
+
+static inline int
+dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val)
+{
+  if (!DWARF_GET_LOC (loc))
+    return -1;
+  *val = *(unw_fpreg_t *) DWARF_GET_LOC (loc);
+  return 0;
+}
+
+static inline int
+dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
+{
+  if (!DWARF_GET_LOC (loc))
+    return -1;
+  *(unw_fpreg_t *) DWARF_GET_LOC (loc) = val;
+  return 0;
+}
+
+static inline int
+dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val)
+{
+  if (!DWARF_GET_LOC (loc))
+    return -1;
+  *val = *(unw_word_t *) DWARF_GET_LOC (loc);
+  return 0;
+}
+
+static inline int
+dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
+{
+  if (!DWARF_GET_LOC (loc))
+    return -1;
+  *(unw_word_t *) DWARF_GET_LOC (loc) = val;
+  return 0;
+}
+
+#else /* !UNW_LOCAL_ONLY */
+# define DWARF_LOC_TYPE_FP      (1 << 0)
+# define DWARF_LOC_TYPE_REG     (1 << 1)
+# define DWARF_NULL_LOC         DWARF_LOC (0, 0)
+# define DWARF_IS_NULL_LOC(l)                                           \
+                ({ dwarf_loc_t _l = (l); _l.val == 0 && _l.type == 0; })
+# define DWARF_LOC(r, t)        ((dwarf_loc_t) { .val = (r), .type = (t) })
+# define DWARF_IS_REG_LOC(l)    (((l).type & DWARF_LOC_TYPE_REG) != 0)
+# define DWARF_IS_FP_LOC(l)     (((l).type & DWARF_LOC_TYPE_FP) != 0)
+# define DWARF_REG_LOC(c,r)     DWARF_LOC((r), DWARF_LOC_TYPE_REG)
+# define DWARF_MEM_LOC(c,m)     DWARF_LOC ((m), 0)
+# define DWARF_FPREG_LOC(c,r)   DWARF_LOC((r), (DWARF_LOC_TYPE_REG      \
+                                                | DWARF_LOC_TYPE_FP))
+
+static inline int
+dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val)
+{
+  char *valp = (char *) &val;
+  unw_word_t addr;
+  int ret;
+
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
+                                       val, 0, c->as_arg);
+
+  addr = DWARF_GET_LOC (loc);
+  if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, (unw_word_t *) valp,
+                                       0, c->as_arg)) < 0)
+    return ret;
+
+  return (*c->as->acc.access_mem) (c->as, addr + 4, (unw_word_t *) valp + 1, 0,
+                                   c->as_arg);
+}
+
+static inline int
+dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
+{
+  char *valp = (char *) &val;
+  unw_word_t addr;
+  int ret;
+
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
+                                       &val, 1, c->as_arg);
+
+  addr = DWARF_GET_LOC (loc);
+  if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, (unw_word_t *) valp,
+                                       1, c->as_arg)) < 0)
+    return ret;
+
+  return (*c->as->acc.access_mem) (c->as, addr + 4, (unw_word_t *) valp + 1,
+                                   1, c->as_arg);
+}
+
+static inline int
+dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val)
+{
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  /* If a code-generator were to save a value of type unw_word_t in a
+     floating-point register, we would have to support this case.  I
+     suppose it could happen with MMX registers, but does it really
+     happen?  */
+  assert (!DWARF_IS_FP_LOC (loc));
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), val,
+                                     0, c->as_arg);
+  else
+    return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), val,
+                                     0, c->as_arg);
+}
+
+static inline int
+dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
+{
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  /* If a code-generator were to save a value of type unw_word_t in a
+     floating-point register, we would have to support this case.  I
+     suppose it could happen with MMX registers, but does it really
+     happen?  */
+  assert (!DWARF_IS_FP_LOC (loc));
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), &val,
+                                     1, c->as_arg);
+  else
+    return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), &val,
+                                     1, c->as_arg);
+}
+
+#endif /* !UNW_LOCAL_ONLY */
+
+#define tdep_getcontext_trace           unw_getcontext
+#define tdep_init_done                  UNW_OBJ(init_done)
+#define tdep_init                       UNW_OBJ(init)
+#define arm_find_proc_info              UNW_OBJ(find_proc_info)
+#define arm_put_unwind_info             UNW_OBJ(put_unwind_info)
+/* Platforms that support UNW_INFO_FORMAT_TABLE need to define
+   tdep_search_unwind_table.  */
+#define tdep_search_unwind_table        UNW_OBJ(search_unwind_table)
+#define tdep_find_unwind_table          dwarf_find_unwind_table
+#define tdep_uc_addr                    UNW_ARCH_OBJ(uc_addr)
+#define tdep_get_elf_image              UNW_ARCH_OBJ(get_elf_image)
+#define tdep_get_exe_image_path         UNW_ARCH_OBJ(get_exe_image_path)
+#define tdep_access_reg                 UNW_OBJ(access_reg)
+#define tdep_access_fpreg               UNW_OBJ(access_fpreg)
+#define tdep_fetch_frame(c,ip,n)        do {} while(0)
+#define tdep_cache_frame(c)             0
+#define tdep_reuse_frame(c,frame)       do {} while(0)
+#define tdep_stash_frame                UNW_OBJ(tdep_stash_frame)
+#define tdep_trace                      UNW_OBJ(tdep_trace)
+
+#ifdef UNW_LOCAL_ONLY
+# define tdep_find_proc_info(c,ip,n)                            \
+        arm_find_proc_info((c)->as, (ip), &(c)->pi, (n),        \
+                                       (c)->as_arg)
+# define tdep_put_unwind_info(as,pi,arg)                \
+        arm_put_unwind_info((as), (pi), (arg))
+#else
+# define tdep_find_proc_info(c,ip,n)                                    \
+        (*(c)->as->acc.find_proc_info)((c)->as, (ip), &(c)->pi, (n),    \
+                                       (c)->as_arg)
+# define tdep_put_unwind_info(as,pi,arg)                \
+        (*(as)->acc.put_unwind_info)((as), (pi), (arg))
+#endif
+
+#define tdep_get_as(c)                  ((c)->dwarf.as)
+#define tdep_get_as_arg(c)              ((c)->dwarf.as_arg)
+#define tdep_get_ip(c)                  ((c)->dwarf.ip)
+#define tdep_big_endian(as)             ((as)->big_endian)
+
+extern int tdep_init_done;
+
+extern void tdep_init (void);
+extern int arm_find_proc_info (unw_addr_space_t as, unw_word_t ip,
+                               unw_proc_info_t *pi, int need_unwind_info,
+                               void *arg);
+extern void arm_put_unwind_info (unw_addr_space_t as,
+                                  unw_proc_info_t *pi, void *arg);
+extern int tdep_search_unwind_table (unw_addr_space_t as, unw_word_t ip,
+                                     unw_dyn_info_t *di, unw_proc_info_t *pi,
+                                     int need_unwind_info, void *arg);
+extern void *tdep_uc_addr (unw_tdep_context_t *uc, int reg);
+extern int tdep_get_elf_image (struct elf_image *ei, pid_t pid, unw_word_t ip,
+                               unsigned long *segbase, unsigned long *mapoff,
+                               char *path, size_t pathlen);
+extern void tdep_get_exe_image_path (char *path);
+extern int tdep_access_reg (struct cursor *c, unw_regnum_t reg,
+                            unw_word_t *valp, int write);
+extern int tdep_access_fpreg (struct cursor *c, unw_regnum_t reg,
+                              unw_fpreg_t *valp, int write);
+extern int tdep_trace (unw_cursor_t *cursor, void **addresses, int *n);
+extern void tdep_stash_frame (struct dwarf_cursor *c,
+                              struct dwarf_reg_state *rs);
+
+/* unwinding method selection support */
+#define UNW_ARM_METHOD_ALL          0xFF
+#define UNW_ARM_METHOD_DWARF        0x01
+#define UNW_ARM_METHOD_FRAME        0x02
+#define UNW_ARM_METHOD_EXIDX        0x04
+
+#define unwi_unwind_method   UNW_OBJ(unwind_method)
+extern int unwi_unwind_method;
+
+#define UNW_TRY_METHOD(x)   (unwi_unwind_method & x)
+
+#endif /* ARM_LIBUNWIND_I_H */
diff --git a/src/third_party/unwind/dist/include/tdep-hppa/dwarf-config.h b/src/third_party/unwind/dist/include/tdep-hppa/dwarf-config.h
new file mode 100644
index 00000000000..fb963c7d307
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-hppa/dwarf-config.h
@@ -0,0 +1,54 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2004 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef dwarf_config_h
+#define dwarf_config_h
+
+/* See DWARF_FRAME_REGNUM() macro in gcc/config/pa/pa32-regs.h: */
+#define dwarf_to_unw_regnum(reg)                        \
+  (((reg) < DWARF_NUM_PRESERVED_REGS) ? (reg) : 0)
+
+/* This matches the value used by GCC (see
+   gcc/config/pa/pa32-regs.h:FIRST_PSEUDO_REGISTER), which leaves
+   plenty of room for expansion.  */
+#define DWARF_NUM_PRESERVED_REGS        89
+
+/* Return TRUE if the ADDR_SPACE uses big-endian byte-order.  */
+#define dwarf_is_big_endian(addr_space) 1
+
+/* Convert a pointer to a dwarf_cursor structure to a pointer to
+   unw_cursor_t.  */
+#define dwarf_to_cursor(c)      ((unw_cursor_t *) (c))
+
+typedef struct dwarf_loc
+  {
+    unw_word_t val;
+#ifndef UNW_LOCAL_ONLY
+    unw_word_t type;            /* see X86_LOC_TYPE_* macros.  */
+#endif
+  }
+dwarf_loc_t;
+
+#endif /* dwarf_config_h */
diff --git a/src/third_party/unwind/dist/include/tdep-hppa/jmpbuf.h b/src/third_party/unwind/dist/include/tdep-hppa/jmpbuf.h
new file mode 100644
index 00000000000..91f062ff7df
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-hppa/jmpbuf.h
@@ -0,0 +1,33 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* Use glibc's jump-buffer indices; NPTL peeks at SP: */
+
+#ifndef JB_SP
+# define JB_SP          19
+#endif
+#define JB_RP           20
+#define JB_MASK_SAVED   21
+#define JB_MASK         22
diff --git a/src/third_party/unwind/dist/include/tdep-hppa/libunwind_i.h b/src/third_party/unwind/dist/include/tdep-hppa/libunwind_i.h
new file mode 100644
index 00000000000..72649aa3ecc
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-hppa/libunwind_i.h
@@ -0,0 +1,279 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef HPPA_LIBUNWIND_I_H
+#define HPPA_LIBUNWIND_I_H
+
+/* Target-dependent definitions that are internal to libunwind but need
+   to be shared with target-independent code.  */
+
+#include <stdlib.h>
+#include <libunwind.h>
+
+#include "elf32.h"
+#include "mempool.h"
+#include "dwarf.h"
+
+typedef struct
+  {
+    /* no hppa-specific fast trace */
+  }
+unw_tdep_frame_t;
+
+struct unw_addr_space
+  {
+    struct unw_accessors acc;
+    unw_caching_policy_t caching_policy;
+#ifdef HAVE_ATOMIC_OPS_H
+    AO_t cache_generation;
+#else
+    uint32_t cache_generation;
+#endif
+    unw_word_t dyn_generation;          /* see dyn-common.h */
+    unw_word_t dyn_info_list_addr;      /* (cached) dyn_info_list_addr */
+    struct dwarf_rs_cache global_cache;
+    struct unw_debug_frame_list *debug_frames;
+   };
+
+struct cursor
+  {
+    struct dwarf_cursor dwarf;          /* must be first */
+
+    /* Format of sigcontext structure and address at which it is
+       stored: */
+    enum
+      {
+        HPPA_SCF_NONE,                  /* no signal frame encountered */
+        HPPA_SCF_LINUX_RT_SIGFRAME      /* POSIX ucontext_t */
+      }
+    sigcontext_format;
+    unw_word_t sigcontext_addr;
+  };
+
+#define DWARF_GET_LOC(l)        ((l).val)
+
+#ifdef UNW_LOCAL_ONLY
+# define DWARF_NULL_LOC         DWARF_LOC (0, 0)
+# define DWARF_IS_NULL_LOC(l)   (DWARF_GET_LOC (l) == 0)
+# define DWARF_LOC(r, t)        ((dwarf_loc_t) { .val = (r) })
+# define DWARF_IS_REG_LOC(l)    0
+# define DWARF_REG_LOC(c,r)     (DWARF_LOC((unw_word_t)                      \
+                                 tdep_uc_addr((c)->as_arg, (r)), 0))
+# define DWARF_MEM_LOC(c,m)     DWARF_LOC ((m), 0)
+# define DWARF_FPREG_LOC(c,r)   (DWARF_LOC((unw_word_t)                      \
+                                 tdep_uc_addr((c)->as_arg, (r)), 0))
+
+static inline int
+dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val)
+{
+  if (!DWARF_GET_LOC (loc))
+    return -1;
+  *val = *(unw_fpreg_t *) DWARF_GET_LOC (loc);
+  return 0;
+}
+
+static inline int
+dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
+{
+  if (!DWARF_GET_LOC (loc))
+    return -1;
+  *(unw_fpreg_t *) DWARF_GET_LOC (loc) = val;
+  return 0;
+}
+
+static inline int
+dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val)
+{
+  if (!DWARF_GET_LOC (loc))
+    return -1;
+  *val = *(unw_word_t *) DWARF_GET_LOC (loc);
+  return 0;
+}
+
+static inline int
+dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
+{
+  if (!DWARF_GET_LOC (loc))
+    return -1;
+  *(unw_word_t *) DWARF_GET_LOC (loc) = val;
+  return 0;
+}
+
+#else /* !UNW_LOCAL_ONLY */
+# define DWARF_LOC_TYPE_FP      (1 << 0)
+# define DWARF_LOC_TYPE_REG     (1 << 1)
+# define DWARF_NULL_LOC         DWARF_LOC (0, 0)
+# define DWARF_IS_NULL_LOC(l)                                           \
+                ({ dwarf_loc_t _l = (l); _l.val == 0 && _l.type == 0; })
+# define DWARF_LOC(r, t)        ((dwarf_loc_t) { .val = (r), .type = (t) })
+# define DWARF_IS_REG_LOC(l)    (((l).type & DWARF_LOC_TYPE_REG) != 0)
+# define DWARF_IS_FP_LOC(l)     (((l).type & DWARF_LOC_TYPE_FP) != 0)
+# define DWARF_REG_LOC(c,r)     DWARF_LOC((r), DWARF_LOC_TYPE_REG)
+# define DWARF_MEM_LOC(c,m)     DWARF_LOC ((m), 0)
+# define DWARF_FPREG_LOC(c,r)   DWARF_LOC((r), (DWARF_LOC_TYPE_REG      \
+                                                | DWARF_LOC_TYPE_FP))
+
+static inline int
+dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val)
+{
+  char *valp = (char *) &val;
+  unw_word_t addr;
+  int ret;
+
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
+                                       val, 0, c->as_arg);
+
+  addr = DWARF_GET_LOC (loc);
+  if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, (unw_word_t *) valp,
+                                       0, c->as_arg)) < 0)
+    return ret;
+
+  return (*c->as->acc.access_mem) (c->as, addr + 4, (unw_word_t *) valp + 1, 0,
+                                   c->as_arg);
+}
+
+static inline int
+dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
+{
+  char *valp = (char *) &val;
+  unw_word_t addr;
+  int ret;
+
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
+                                       &val, 1, c->as_arg);
+
+  addr = DWARF_GET_LOC (loc);
+  if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, (unw_word_t *) valp,
+                                       1, c->as_arg)) < 0)
+    return ret;
+
+  return (*c->as->acc.access_mem) (c->as, addr + 4, (unw_word_t *) valp + 1,
+                                   1, c->as_arg);
+}
+
+static inline int
+dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val)
+{
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  /* If a code-generator were to save a value of type unw_word_t in a
+     floating-point register, we would have to support this case.  I
+     suppose it could happen with MMX registers, but does it really
+     happen?  */
+  assert (!DWARF_IS_FP_LOC (loc));
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), val,
+                                     0, c->as_arg);
+  else
+    return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), val,
+                                     0, c->as_arg);
+}
+
+static inline int
+dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
+{
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  /* If a code-generator were to save a value of type unw_word_t in a
+     floating-point register, we would have to support this case.  I
+     suppose it could happen with MMX registers, but does it really
+     happen?  */
+  assert (!DWARF_IS_FP_LOC (loc));
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), &val,
+                                     1, c->as_arg);
+  else
+    return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), &val,
+                                     1, c->as_arg);
+}
+
+#endif /* !UNW_LOCAL_ONLY */
+
+#define tdep_getcontext_trace           unw_getcontext
+#define tdep_init_done                  UNW_OBJ(init_done)
+#define tdep_init                       UNW_OBJ(init)
+/* Platforms that support UNW_INFO_FORMAT_TABLE need to define
+   tdep_search_unwind_table.  */
+#define tdep_search_unwind_table        dwarf_search_unwind_table
+#define tdep_find_unwind_table          dwarf_find_unwind_table
+#define tdep_uc_addr                    UNW_ARCH_OBJ(uc_addr)
+#define tdep_get_elf_image              UNW_ARCH_OBJ(get_elf_image)
+#define tdep_get_exe_image_path         UNW_ARCH_OBJ(get_exe_image_path)
+#define tdep_access_reg                 UNW_OBJ(access_reg)
+#define tdep_access_fpreg               UNW_OBJ(access_fpreg)
+#define tdep_fetch_frame(c,ip,n)        do {} while(0)
+#define tdep_cache_frame(c)             0
+#define tdep_reuse_frame(c,frame)       do {} while(0)
+#define tdep_stash_frame(c,rs)          do {} while(0)
+#define tdep_trace(cur,addr,n)          (-UNW_ENOINFO)
+
+#ifdef UNW_LOCAL_ONLY
+# define tdep_find_proc_info(c,ip,n)                            \
+        dwarf_find_proc_info((c)->as, (ip), &(c)->pi, (n),      \
+                                       (c)->as_arg)
+# define tdep_put_unwind_info(as,pi,arg)                \
+        dwarf_put_unwind_info((as), (pi), (arg))
+#else
+# define tdep_find_proc_info(c,ip,n)                                    \
+        (*(c)->as->acc.find_proc_info)((c)->as, (ip), &(c)->pi, (n),    \
+                                       (c)->as_arg)
+# define tdep_put_unwind_info(as,pi,arg)                \
+        (*(as)->acc.put_unwind_info)((as), (pi), (arg))
+#endif
+
+#define tdep_get_as(c)                  ((c)->dwarf.as)
+#define tdep_get_as_arg(c)              ((c)->dwarf.as_arg)
+#define tdep_get_ip(c)                  ((c)->dwarf.ip)
+#define tdep_big_endian(as)             1
+
+extern int tdep_init_done;
+
+extern void tdep_init (void);
+extern int tdep_search_unwind_table (unw_addr_space_t as, unw_word_t ip,
+                                     unw_dyn_info_t *di, unw_proc_info_t *pi,
+                                     int need_unwind_info, void *arg);
+extern void *tdep_uc_addr (ucontext_t *uc, int reg);
+extern int tdep_get_elf_image (struct elf_image *ei, pid_t pid, unw_word_t ip,
+                               unsigned long *segbase, unsigned long *mapoff,
+                               char *path, size_t pathlen);
+extern void tdep_get_exe_image_path (char *path);
+extern int tdep_access_reg (struct cursor *c, unw_regnum_t reg,
+                            unw_word_t *valp, int write);
+extern int tdep_access_fpreg (struct cursor *c, unw_regnum_t reg,
+                              unw_fpreg_t *valp, int write);
+
+#endif /* HPPA_LIBUNWIND_I_H */
diff --git a/src/third_party/unwind/dist/include/tdep-ia64/jmpbuf.h b/src/third_party/unwind/dist/include/tdep-ia64/jmpbuf.h
new file mode 100644
index 00000000000..d642af2075a
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-ia64/jmpbuf.h
@@ -0,0 +1,32 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* Use glibc's jump-buffer indices; NPTL peeks at SP and BSP: */
+
+#define JB_SP            0
+#define JB_RP            8
+#define JB_BSP          17
+#define JB_MASK_SAVED   70
+#define JB_MASK         71
diff --git a/src/third_party/unwind/dist/include/tdep-ia64/libunwind_i.h b/src/third_party/unwind/dist/include/tdep-ia64/libunwind_i.h
new file mode 100644
index 00000000000..1d9770bab85
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-ia64/libunwind_i.h
@@ -0,0 +1,281 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef IA64_LIBUNWIND_I_H
+#define IA64_LIBUNWIND_I_H
+
+/* Target-dependent definitions that are internal to libunwind but need
+   to be shared with target-independent code.  */
+
+#include "elf64.h"
+#include "mempool.h"
+
+typedef struct
+  {
+    /* no ia64-specific fast trace */
+  }
+unw_tdep_frame_t;
+
+enum ia64_pregnum
+  {
+    /* primary unat: */
+    IA64_REG_PRI_UNAT_GR,
+    IA64_REG_PRI_UNAT_MEM,
+
+    /* memory stack (order matters: see build_script() */
+    IA64_REG_PSP,                       /* previous memory stack pointer */
+    /* register stack */
+    IA64_REG_BSP,                       /* register stack pointer */
+    IA64_REG_BSPSTORE,
+    IA64_REG_PFS,                       /* previous function state */
+    IA64_REG_RNAT,
+    /* instruction pointer: */
+    IA64_REG_IP,
+
+    /* preserved registers: */
+    IA64_REG_R4, IA64_REG_R5, IA64_REG_R6, IA64_REG_R7,
+    IA64_REG_NAT4, IA64_REG_NAT5, IA64_REG_NAT6, IA64_REG_NAT7,
+    IA64_REG_UNAT, IA64_REG_PR, IA64_REG_LC, IA64_REG_FPSR,
+    IA64_REG_B1, IA64_REG_B2, IA64_REG_B3, IA64_REG_B4, IA64_REG_B5,
+    IA64_REG_F2, IA64_REG_F3, IA64_REG_F4, IA64_REG_F5,
+    IA64_REG_F16, IA64_REG_F17, IA64_REG_F18, IA64_REG_F19,
+    IA64_REG_F20, IA64_REG_F21, IA64_REG_F22, IA64_REG_F23,
+    IA64_REG_F24, IA64_REG_F25, IA64_REG_F26, IA64_REG_F27,
+    IA64_REG_F28, IA64_REG_F29, IA64_REG_F30, IA64_REG_F31,
+    IA64_NUM_PREGS
+  };
+
+#ifdef UNW_LOCAL_ONLY
+
+typedef unw_word_t ia64_loc_t;
+
+#else /* !UNW_LOCAL_ONLY */
+
+typedef struct ia64_loc
+  {
+    unw_word_t w0, w1;
+  }
+ia64_loc_t;
+
+#endif /* !UNW_LOCAL_ONLY */
+
+#include "script.h"
+
+#define ABI_UNKNOWN                     0
+#define ABI_LINUX                       1
+#define ABI_HPUX                        2
+#define ABI_FREEBSD                     3
+#define ABI_OPENVMS                     4
+#define ABI_NSK                         5       /* Tandem/HP Non-Stop Kernel */
+#define ABI_WINDOWS                     6
+
+struct unw_addr_space
+  {
+    struct unw_accessors acc;
+    int big_endian;
+    int abi;    /* abi < 0 => unknown, 0 => SysV, 1 => HP-UX, 2 => Windows */
+    unw_caching_policy_t caching_policy;
+#ifdef HAVE_ATOMIC_OPS_H
+    AO_t cache_generation;
+#else
+    uint32_t cache_generation;
+#endif
+    unw_word_t dyn_generation;
+    unw_word_t dyn_info_list_addr;      /* (cached) dyn_info_list_addr */
+#ifndef UNW_REMOTE_ONLY
+    unsigned long long shared_object_removals;
+#endif
+
+    struct ia64_script_cache global_cache;
+   };
+
+/* Note: The ABI numbers in the ABI-markers (.unwabi directive) are
+   not the same as the above ABI numbers.  */
+#define ABI_MARKER_OLD_LINUX_SIGTRAMP   ((0 << 8) | 's')
+#define ABI_MARKER_OLD_LINUX_INTERRUPT  ((0 << 8) | 'i')
+#define ABI_MARKER_HP_UX_SIGTRAMP       ((1 << 8) | 1)
+#define ABI_MARKER_LINUX_SIGTRAMP       ((3 << 8) | 's')
+#define ABI_MARKER_LINUX_INTERRUPT      ((3 << 8) | 'i')
+
+struct cursor
+  {
+    void *as_arg;               /* argument to address-space callbacks */
+    unw_addr_space_t as;        /* reference to per-address-space info */
+
+    /* IP, CFM, and predicate cache (these are always equal to the
+       values stored in ip_loc, cfm_loc, and pr_loc,
+       respectively).  */
+    unw_word_t ip;              /* instruction pointer value */
+    unw_word_t cfm;             /* current frame mask */
+    unw_word_t pr;              /* current predicate values */
+
+    /* current frame info: */
+    unw_word_t bsp;             /* backing store pointer value */
+    unw_word_t sp;              /* stack pointer value */
+    unw_word_t psp;             /* previous sp value */
+    ia64_loc_t cfm_loc;         /* cfm save location (or NULL) */
+    ia64_loc_t ec_loc;          /* ar.ec save location (usually cfm_loc) */
+    ia64_loc_t loc[IA64_NUM_PREGS];
+
+    unw_word_t eh_args[4];      /* exception handler arguments */
+    unw_word_t sigcontext_addr; /* address of sigcontext or 0 */
+    unw_word_t sigcontext_off;  /* sigcontext-offset relative to signal sp */
+
+    short hint;
+    short prev_script;
+
+    uint8_t nat_bitnr[4];       /* NaT bit numbers for r4-r7 */
+    uint16_t abi_marker;        /* abi_marker for current frame (if any) */
+    uint16_t last_abi_marker;   /* last abi_marker encountered so far */
+    uint8_t eh_valid_mask;
+
+    unsigned int pi_valid :1;           /* is proc_info valid? */
+    unsigned int pi_is_dynamic :1; /* proc_info found via dynamic proc info? */
+    unw_proc_info_t pi;         /* info about current procedure */
+
+    /* In case of stack-discontiguities, such as those introduced by
+       signal-delivery on an alternate signal-stack (see
+       sigaltstack(2)), we use the following data-structure to keep
+       track of the register-backing-store areas across on which the
+       current frame may be backed up.  Since there are at most 96
+       stacked registers and since we only have to track the current
+       frame and only areas that are not empty, this puts an upper
+       limit on the # of backing-store areas we have to track.
+
+       Note that the rbs-area indexed by rbs_curr identifies the
+       rbs-area that was in effect at the time AR.BSP had the value
+       c->bsp.  However, this rbs area may not actually contain the
+       value in the register that c->bsp corresponds to because that
+       register may not have gotten spilled until much later, when a
+       possibly different rbs-area might have been in effect
+       already.  */
+    uint8_t rbs_curr;           /* index of curr. rbs-area (contains c->bsp) */
+    uint8_t rbs_left_edge;      /* index of inner-most valid rbs-area */
+    struct rbs_area
+      {
+        unw_word_t end;
+        unw_word_t size;
+        ia64_loc_t rnat_loc;
+      }
+    rbs_area[96 + 2];   /* 96 stacked regs + 1 extra stack on each side... */
+};
+
+struct ia64_global_unwind_state
+  {
+    pthread_mutex_t lock;               /* global data lock */
+
+    volatile char init_done;
+
+    /* Table of registers that prologues can save (and order in which
+       they're saved).  */
+    const unsigned char save_order[8];
+
+    /*
+     * uc_addr() may return pointers to these variables.  We need to
+     * make sure they don't get written via ia64_put() or
+     * ia64_putfp().  To make it possible to test for these variables
+     * quickly, we collect them in a single sub-structure.
+     */
+    struct
+      {
+        unw_word_t  r0;                 /* r0 is byte-order neutral */
+        unw_fpreg_t f0;                 /* f0 is byte-order neutral */
+        unw_fpreg_t f1_le, f1_be;       /* f1 is byte-order dependent */
+      }
+    read_only;
+    unw_fpreg_t nat_val_le, nat_val_be;
+    unw_fpreg_t int_val_le, int_val_be;
+
+    struct mempool reg_state_pool;
+    struct mempool labeled_state_pool;
+
+# if UNW_DEBUG
+    const char *preg_name[IA64_NUM_PREGS];
+# endif
+  };
+
+#define tdep_getcontext_trace           unw_getcontext
+#define tdep_init_done                  unw.init_done
+#define tdep_init                       UNW_OBJ(init)
+/* Platforms that support UNW_INFO_FORMAT_TABLE need to define
+   tdep_search_unwind_table.  */
+#define tdep_search_unwind_table        unw_search_ia64_unwind_table
+#define tdep_find_unwind_table  ia64_find_unwind_table
+#define tdep_find_proc_info             UNW_OBJ(find_proc_info)
+#define tdep_uc_addr                    UNW_OBJ(uc_addr)
+#define tdep_get_elf_image              UNW_ARCH_OBJ(get_elf_image)
+#define tdep_get_exe_image_path         UNW_ARCH_OBJ(get_exe_image_path)
+#define tdep_access_reg                 UNW_OBJ(access_reg)
+#define tdep_access_fpreg               UNW_OBJ(access_fpreg)
+#define tdep_fetch_frame(c,ip,n)        do {} while(0)
+#define tdep_cache_frame(c)             0
+#define tdep_reuse_frame(c,frame)       do {} while(0)
+#define tdep_stash_frame(c,rs)          do {} while(0)
+#define tdep_trace(cur,addr,n)          (-UNW_ENOINFO)
+#define tdep_get_as(c)                  ((c)->as)
+#define tdep_get_as_arg(c)              ((c)->as_arg)
+#define tdep_get_ip(c)                  ((c)->ip)
+#define tdep_big_endian(as)             ((c)->as->big_endian != 0)
+
+#ifndef UNW_LOCAL_ONLY
+# define tdep_put_unwind_info           UNW_OBJ(put_unwind_info)
+#endif
+
+/* This can't be an UNW_ARCH_OBJ() because we need separate
+   unw.initialized flags for the local-only and generic versions of
+   the library.  Also, if we wanted to have a single, shared global
+   data structure, we couldn't declare "unw" as HIDDEN.  */
+#define unw                             UNW_OBJ(data)
+
+extern void tdep_init (void);
+extern int tdep_find_unwind_table (struct elf_dyn_info *edi,
+                                   unw_addr_space_t as, char *path,
+                                   unw_word_t segbase, unw_word_t mapoff,
+                                   unw_word_t ip);
+extern int tdep_find_proc_info (unw_addr_space_t as, unw_word_t ip,
+                                unw_proc_info_t *pi, int need_unwind_info,
+                                void *arg);
+extern void tdep_put_unwind_info (unw_addr_space_t as,
+                                  unw_proc_info_t *pi, void *arg);
+extern void *tdep_uc_addr (ucontext_t *uc, unw_regnum_t regnum,
+                           uint8_t *nat_bitnr);
+extern int tdep_get_elf_image (struct elf_image *ei, pid_t pid, unw_word_t ip,
+                               unsigned long *segbase, unsigned long *mapoff,
+                               char *path, size_t pathlen);
+extern void tdep_get_exe_image_path (char *path);
+extern int tdep_access_reg (struct cursor *c, unw_regnum_t reg,
+                            unw_word_t *valp, int write);
+extern int tdep_access_fpreg (struct cursor *c, unw_regnum_t reg,
+                              unw_fpreg_t *valp, int write);
+
+extern struct ia64_global_unwind_state unw;
+
+/* In user-level, we have no reasonable way of determining the base of
+   an arbitrary backing-store.  We default to half the
+   address-space.  */
+#define rbs_get_base(c,bspstore,rbs_basep)                              \
+        (*(rbs_basep) = (bspstore) - (((unw_word_t) 1) << 63), 0)
+
+#endif /* IA64_LIBUNWIND_I_H */
diff --git a/src/third_party/unwind/dist/include/tdep-ia64/rse.h b/src/third_party/unwind/dist/include/tdep-ia64/rse.h
new file mode 100644
index 00000000000..ee521a5917a
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-ia64/rse.h
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 1998, 1999, 2002, 2003, 2005 Hewlett-Packard Co
+ *      David Mosberger-Tang <davidm@hpl.hp.com>
+ *
+ * Register stack engine related helper functions.  This file may be
+ * used in applications, so be careful about the name-space and give
+ * some consideration to non-GNU C compilers (though __inline__ is
+ * fine).
+ */
+#ifndef RSE_H
+#define RSE_H
+
+#include <libunwind.h>
+
+static inline uint64_t
+rse_slot_num (uint64_t addr)
+{
+        return (addr >> 3) & 0x3f;
+}
+
+/*
+ * Return TRUE if ADDR is the address of an RNAT slot.
+ */
+static inline uint64_t
+rse_is_rnat_slot (uint64_t addr)
+{
+        return rse_slot_num (addr) == 0x3f;
+}
+
+/*
+ * Returns the address of the RNAT slot that covers the slot at
+ * address SLOT_ADDR.
+ */
+static inline uint64_t
+rse_rnat_addr (uint64_t slot_addr)
+{
+        return slot_addr | (0x3f << 3);
+}
+
+/*
+ * Calculate the number of registers in the dirty partition starting at
+ * BSPSTORE and ending at BSP.  This isn't simply (BSP-BSPSTORE)/8
+ * because every 64th slot stores ar.rnat.
+ */
+static inline uint64_t
+rse_num_regs (uint64_t bspstore, uint64_t bsp)
+{
+        uint64_t slots = (bsp - bspstore) >> 3;
+
+        return slots - (rse_slot_num(bspstore) + slots)/0x40;
+}
+
+/*
+ * The inverse of the above: given bspstore and the number of
+ * registers, calculate ar.bsp.
+ */
+static inline uint64_t
+rse_skip_regs (uint64_t addr, long num_regs)
+{
+        long delta = rse_slot_num(addr) + num_regs;
+
+        if (num_regs < 0)
+                delta -= 0x3e;
+        return addr + ((num_regs + delta/0x3f) << 3);
+}
+
+#endif /* RSE_H */
diff --git a/src/third_party/unwind/dist/include/tdep-ia64/script.h b/src/third_party/unwind/dist/include/tdep-ia64/script.h
new file mode 100644
index 00000000000..fe3360bf582
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-ia64/script.h
@@ -0,0 +1,85 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2002 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#define IA64_LOG_UNW_CACHE_SIZE 7
+#define IA64_UNW_CACHE_SIZE     (1 << IA64_LOG_UNW_CACHE_SIZE)
+
+#define IA64_LOG_UNW_HASH_SIZE  (IA64_LOG_UNW_CACHE_SIZE + 1)
+#define IA64_UNW_HASH_SIZE      (1 << IA64_LOG_UNW_HASH_SIZE)
+
+typedef unsigned char unw_hash_index_t;
+
+struct ia64_script_insn
+  {
+    unsigned int opc;           /* see enum ia64_script_insn_opcode */
+    unsigned int dst;
+    unw_word_t val;
+  };
+
+/* Updating each preserved register may result in one script
+   instruction each.  At the end of the script, psp gets popped,
+   accounting for one more instruction.  */
+#define IA64_MAX_SCRIPT_LEN     (IA64_NUM_PREGS + 1)
+
+struct ia64_script
+  {
+    unw_word_t ip;              /* ip this script is for */
+    unw_word_t pr_mask;         /* mask of predicates script depends on */
+    unw_word_t pr_val;          /* predicate values this script is for */
+    unw_proc_info_t pi;         /* info about underlying procedure */
+    unsigned short lru_chain;   /* used for least-recently-used chain */
+    unsigned short coll_chain;  /* used for hash collisions */
+    unsigned short hint;        /* hint for next script to try (or -1) */
+    unsigned short count;       /* number of instructions in script */
+    unsigned short abi_marker;
+    struct ia64_script_insn insn[IA64_MAX_SCRIPT_LEN];
+  };
+
+struct ia64_script_cache
+  {
+#ifdef HAVE_ATOMIC_OPS_H
+    AO_TS_t busy;               /* is the script-cache busy? */
+#else
+    pthread_mutex_t lock;
+#endif
+    unsigned short lru_head;    /* index of lead-recently used script */
+    unsigned short lru_tail;    /* index of most-recently used script */
+
+    /* hash table that maps instruction pointer to script index: */
+    unsigned short hash[IA64_UNW_HASH_SIZE];
+
+    uint32_t generation;        /* generation number */
+
+    /* script cache: */
+    struct ia64_script buckets[IA64_UNW_CACHE_SIZE];
+  };
+
+#define ia64_cache_proc_info            UNW_OBJ(cache_proc_info)
+#define ia64_get_cached_proc_info       UNW_OBJ(get_cached_proc_info)
+
+struct cursor;                  /* forward declaration */
+
+extern int ia64_cache_proc_info (struct cursor *c);
+extern int ia64_get_cached_proc_info (struct cursor *c);
diff --git a/src/third_party/unwind/dist/include/tdep-mips/dwarf-config.h b/src/third_party/unwind/dist/include/tdep-mips/dwarf-config.h
new file mode 100644
index 00000000000..8006d0b8dd4
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-mips/dwarf-config.h
@@ -0,0 +1,54 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef dwarf_config_h
+#define dwarf_config_h
+
+/* This is FIRST_PSEUDO_REGISTER in GCC, since DWARF_FRAME_REGISTERS is not
+   explicitly defined.  */
+#define DWARF_NUM_PRESERVED_REGS        188
+
+#define dwarf_to_unw_regnum(reg) (((reg) < 32) ? (reg) : 0)
+
+/* Return TRUE if the ADDR_SPACE uses big-endian byte-order.  */
+#define dwarf_is_big_endian(addr_space) ((addr_space)->big_endian)
+
+/* Return the size of an address, for DWARF purposes.  */
+#define dwarf_addr_size(addr_space) ((addr_space)->addr_size)
+
+/* Convert a pointer to a dwarf_cursor structure to a pointer to
+   unw_cursor_t.  */
+#define dwarf_to_cursor(c)      ((unw_cursor_t *) (c))
+
+typedef struct dwarf_loc
+  {
+    unw_word_t val;
+#ifndef UNW_LOCAL_ONLY
+    unw_word_t type;            /* see DWARF_LOC_TYPE_* macros.  */
+#endif
+  }
+dwarf_loc_t;
+
+#endif /* dwarf_config_h */
diff --git a/src/third_party/unwind/dist/include/tdep-mips/jmpbuf.h b/src/third_party/unwind/dist/include/tdep-mips/jmpbuf.h
new file mode 100644
index 00000000000..c099f9267e2
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-mips/jmpbuf.h
@@ -0,0 +1,32 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* Use glibc's jump-buffer indices; NPTL peeks at SP: */
+
+/* FIXME for MIPS!  */
+
+#define JB_SP           4
+#define JB_RP           5
+#define JB_MASK_SAVED   6
+#define JB_MASK         7
diff --git a/src/third_party/unwind/dist/include/tdep-mips/libunwind_i.h b/src/third_party/unwind/dist/include/tdep-mips/libunwind_i.h
new file mode 100644
index 00000000000..0c0fd3cf47e
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-mips/libunwind_i.h
@@ -0,0 +1,339 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef MIPS_LIBUNWIND_I_H
+#define MIPS_LIBUNWIND_I_H
+
+/* Target-dependent definitions that are internal to libunwind but need
+   to be shared with target-independent code.  */
+
+#include <stdlib.h>
+#include <libunwind.h>
+
+#if !defined(UNW_REMOTE_ONLY) && _MIPS_SIM == _ABI64
+# include "elf64.h"
+#else
+# include "elf32.h"
+#endif
+#include "mempool.h"
+#include "dwarf.h"
+
+typedef struct
+  {
+    /* no mips-specific fast trace */
+  }
+unw_tdep_frame_t;
+
+struct unw_addr_space
+  {
+    struct unw_accessors acc;
+
+    int big_endian;
+    mips_abi_t abi;
+    unsigned int addr_size;
+
+    unw_caching_policy_t caching_policy;
+#ifdef HAVE_ATOMIC_OPS_H
+    AO_t cache_generation;
+#else
+    uint32_t cache_generation;
+#endif
+    unw_word_t dyn_generation;          /* see dyn-common.h */
+    unw_word_t dyn_info_list_addr;      /* (cached) dyn_info_list_addr */
+    struct dwarf_rs_cache global_cache;
+    struct unw_debug_frame_list *debug_frames;
+};
+
+#define tdep_big_endian(as)             ((as)->big_endian)
+
+struct cursor
+  {
+    struct dwarf_cursor dwarf;          /* must be first */
+    unw_word_t sigcontext_addr;
+  };
+
+#define DWARF_GET_LOC(l)        ((l).val)
+
+#ifndef UNW_REMOTE_ONLY
+# if _MIPS_SIM == _ABIN32
+typedef long long mips_reg_t;
+# else
+typedef long mips_reg_t;
+# endif
+#endif
+
+#ifdef UNW_LOCAL_ONLY
+# define DWARF_NULL_LOC         DWARF_LOC (0, 0)
+# define DWARF_IS_NULL_LOC(l)   (DWARF_GET_LOC (l) == 0)
+# define DWARF_LOC(r, t)        ((dwarf_loc_t) { .val = (r) })
+# define DWARF_IS_REG_LOC(l)    0
+# define DWARF_REG_LOC(c,r)     (DWARF_LOC((unw_word_t) (intptr_t)           \
+                                 tdep_uc_addr((c)->as_arg, (r)), 0))
+# define DWARF_MEM_LOC(c,m)     DWARF_LOC ((m), 0)
+# define DWARF_FPREG_LOC(c,r)   (DWARF_LOC((unw_word_t) (intptr_t)           \
+                                 tdep_uc_addr((c)->as_arg, (r)), 0))
+
+/* FIXME: Implement these for the MIPS FPU.  */
+static inline int
+dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val)
+{
+  if (!DWARF_GET_LOC (loc))
+    return -1;
+  *val = *(unw_fpreg_t *) (intptr_t) DWARF_GET_LOC (loc);
+  return 0;
+}
+
+static inline int
+dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
+{
+  if (!DWARF_GET_LOC (loc))
+    return -1;
+  *(unw_fpreg_t *) (intptr_t) DWARF_GET_LOC (loc) = val;
+  return 0;
+}
+
+static inline int
+dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val)
+{
+  if (!DWARF_GET_LOC (loc))
+    return -1;
+  *val = *(mips_reg_t *) (intptr_t) DWARF_GET_LOC (loc);
+  return 0;
+}
+
+static inline int
+dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
+{
+  if (!DWARF_GET_LOC (loc))
+    return -1;
+  *(mips_reg_t *) (intptr_t) DWARF_GET_LOC (loc) = val;
+  return 0;
+}
+
+#else /* !UNW_LOCAL_ONLY */
+# define DWARF_LOC_TYPE_FP      (1 << 0)
+# define DWARF_LOC_TYPE_REG     (1 << 1)
+# define DWARF_NULL_LOC         DWARF_LOC (0, 0)
+# define DWARF_IS_NULL_LOC(l)                                           \
+                ({ dwarf_loc_t _l = (l); _l.val == 0 && _l.type == 0; })
+# define DWARF_LOC(r, t)        ((dwarf_loc_t) { .val = (r), .type = (t) })
+# define DWARF_IS_REG_LOC(l)    (((l).type & DWARF_LOC_TYPE_REG) != 0)
+# define DWARF_IS_FP_LOC(l)     (((l).type & DWARF_LOC_TYPE_FP) != 0)
+# define DWARF_REG_LOC(c,r)     DWARF_LOC((r), DWARF_LOC_TYPE_REG)
+# define DWARF_MEM_LOC(c,m)     DWARF_LOC ((m), 0)
+# define DWARF_FPREG_LOC(c,r)   DWARF_LOC((r), (DWARF_LOC_TYPE_REG      \
+                                                | DWARF_LOC_TYPE_FP))
+
+static inline int
+read_s32 (struct dwarf_cursor *c, unw_word_t addr, unw_word_t *val)
+{
+  int offset = addr & 4;
+  int ret;
+  unw_word_t memval;
+
+  ret = (*c->as->acc.access_mem) (c->as, addr - offset, &memval, 0, c->as_arg);
+  if (ret < 0)
+    return ret;
+
+  if ((offset != 0) == tdep_big_endian (c->as))
+    *val = (int32_t) memval;
+  else
+    *val = (int32_t) (memval >> 32);
+
+  return 0;
+}
+
+static inline int
+write_s32 (struct dwarf_cursor *c, unw_word_t addr, const unw_word_t *val)
+{
+  int offset = addr & 4;
+  int ret;
+  unw_word_t memval;
+
+  ret = (*c->as->acc.access_mem) (c->as, addr - offset, &memval, 0, c->as_arg);
+  if (ret < 0)
+    return ret;
+
+  if ((offset != 0) == tdep_big_endian (c->as))
+    memval = (memval & ~0xffffffffLL) | (uint32_t) *val;
+  else
+    memval = (memval & 0xffffffffLL) | (uint32_t) (*val << 32);
+
+  return (*c->as->acc.access_mem) (c->as, addr - offset, &memval, 1, c->as_arg);
+}
+
+/* FIXME: Implement these for the MIPS FPU.  */
+static inline int
+dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val)
+{
+  char *valp = (char *) &val;
+  unw_word_t addr;
+  int ret;
+
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
+                                       val, 0, c->as_arg);
+
+  addr = DWARF_GET_LOC (loc);
+  if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, (unw_word_t *) valp,
+                                       0, c->as_arg)) < 0)
+    return ret;
+
+  return (*c->as->acc.access_mem) (c->as, addr + 4, (unw_word_t *) valp + 1, 0,
+                                   c->as_arg);
+}
+
+static inline int
+dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
+{
+  char *valp = (char *) &val;
+  unw_word_t addr;
+  int ret;
+
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
+                                       &val, 1, c->as_arg);
+
+  addr = DWARF_GET_LOC (loc);
+  if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, (unw_word_t *) valp,
+                                       1, c->as_arg)) < 0)
+    return ret;
+
+  return (*c->as->acc.access_mem) (c->as, addr + 4, (unw_word_t *) valp + 1,
+                                   1, c->as_arg);
+}
+
+static inline int
+dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val)
+{
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  /* If a code-generator were to save a value of type unw_word_t in a
+     floating-point register, we would have to support this case.  I
+     suppose it could happen with MMX registers, but does it really
+     happen?  */
+  assert (!DWARF_IS_FP_LOC (loc));
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), val,
+                                     0, c->as_arg);
+  else if (c->as->abi == UNW_MIPS_ABI_O32)
+    return read_s32 (c, DWARF_GET_LOC (loc), val);
+  else if (c->as->abi == UNW_MIPS_ABI_N32) {
+    if (tdep_big_endian(c->as))
+      return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc) + 4, val,
+                                       0, c->as_arg);
+    else
+      return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), val,
+                                       0, c->as_arg);
+  }
+  else
+    return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), val,
+                                     0, c->as_arg);
+}
+
+static inline int
+dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
+{
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  /* If a code-generator were to save a value of type unw_word_t in a
+     floating-point register, we would have to support this case.  I
+     suppose it could happen with MMX registers, but does it really
+     happen?  */
+  assert (!DWARF_IS_FP_LOC (loc));
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), &val,
+                                     1, c->as_arg);
+  else if (c->as->abi == UNW_MIPS_ABI_O32)
+    return write_s32 (c, DWARF_GET_LOC (loc), &val);
+  else
+    return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), &val,
+                                     1, c->as_arg);
+}
+
+#endif /* !UNW_LOCAL_ONLY */
+
+#define tdep_getcontext_trace           unw_getcontext
+#define tdep_init_done                  UNW_OBJ(init_done)
+#define tdep_init                       UNW_OBJ(init)
+/* Platforms that support UNW_INFO_FORMAT_TABLE need to define
+   tdep_search_unwind_table.  */
+#define tdep_search_unwind_table        dwarf_search_unwind_table
+#define tdep_find_unwind_table          dwarf_find_unwind_table
+#define tdep_uc_addr                    UNW_ARCH_OBJ(uc_addr)
+#define tdep_get_elf_image              UNW_ARCH_OBJ(get_elf_image)
+#define tdep_get_exe_image_path         UNW_ARCH_OBJ(get_exe_image_path)
+#define tdep_access_reg                 UNW_OBJ(access_reg)
+#define tdep_access_fpreg               UNW_OBJ(access_fpreg)
+#define tdep_fetch_frame(c,ip,n)        do {} while(0)
+#define tdep_cache_frame(c)             0
+#define tdep_reuse_frame(c,frame)       do {} while(0)
+#define tdep_stash_frame(c,rs)          do {} while(0)
+#define tdep_trace(cur,addr,n)          (-UNW_ENOINFO)
+
+#ifdef UNW_LOCAL_ONLY
+# define tdep_find_proc_info(c,ip,n)                            \
+        dwarf_find_proc_info((c)->as, (ip), &(c)->pi, (n),      \
+                                       (c)->as_arg)
+# define tdep_put_unwind_info(as,pi,arg)                \
+        dwarf_put_unwind_info((as), (pi), (arg))
+#else
+# define tdep_find_proc_info(c,ip,n)                                    \
+        (*(c)->as->acc.find_proc_info)((c)->as, (ip), &(c)->pi, (n),    \
+                                       (c)->as_arg)
+# define tdep_put_unwind_info(as,pi,arg)                \
+        (*(as)->acc.put_unwind_info)((as), (pi), (arg))
+#endif
+
+#define tdep_get_as(c)                  ((c)->dwarf.as)
+#define tdep_get_as_arg(c)              ((c)->dwarf.as_arg)
+#define tdep_get_ip(c)                  ((c)->dwarf.ip)
+
+extern int tdep_init_done;
+
+extern void tdep_init (void);
+extern int tdep_search_unwind_table (unw_addr_space_t as, unw_word_t ip,
+                                     unw_dyn_info_t *di, unw_proc_info_t *pi,
+                                     int need_unwind_info, void *arg);
+extern void *tdep_uc_addr (ucontext_t *uc, int reg);
+extern int tdep_get_elf_image (struct elf_image *ei, pid_t pid, unw_word_t ip,
+                               unsigned long *segbase, unsigned long *mapoff,
+                               char *path, size_t pathlen);
+extern void tdep_get_exe_image_path (char *path);
+extern int tdep_access_reg (struct cursor *c, unw_regnum_t reg,
+                            unw_word_t *valp, int write);
+extern int tdep_access_fpreg (struct cursor *c, unw_regnum_t reg,
+                              unw_fpreg_t *valp, int write);
+
+#endif /* MIPS_LIBUNWIND_I_H */
diff --git a/src/third_party/unwind/dist/include/tdep-ppc32/dwarf-config.h b/src/third_party/unwind/dist/include/tdep-ppc32/dwarf-config.h
new file mode 100644
index 00000000000..bf6886b066b
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-ppc32/dwarf-config.h
@@ -0,0 +1,56 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+   Copied from libunwind-x86_64.h, modified slightly for building
+   frysk successfully on ppc64, by Wu Zhou <woodzltc@cn.ibm.com>
+   Will be replaced when libunwind is ready on ppc64 platform.
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef dwarf_config_h
+#define dwarf_config_h
+
+/* For PPC64, 48 GPRs + 33 FPRs + 33 AltiVec + 1 SPE  */
+#define DWARF_NUM_PRESERVED_REGS        115
+
+#define DWARF_REGNUM_MAP_LENGTH         115
+
+/* Return TRUE if the ADDR_SPACE uses big-endian byte-order.  */
+#define dwarf_is_big_endian(addr_space) 1
+
+/* Convert a pointer to a dwarf_cursor structure to a pointer to
+   unw_cursor_t.  */
+#define dwarf_to_cursor(c)      ((unw_cursor_t *) (c))
+
+typedef struct dwarf_loc
+  {
+    unw_word_t val;
+#ifndef UNW_LOCAL_ONLY
+    unw_word_t type;            /* see X86_LOC_TYPE_* macros.  */
+#endif
+  }
+dwarf_loc_t;
+
+#endif /* dwarf_config_h */
diff --git a/src/third_party/unwind/dist/include/tdep-ppc32/jmpbuf.h b/src/third_party/unwind/dist/include/tdep-ppc32/jmpbuf.h
new file mode 100644
index 00000000000..861e94d9712
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-ppc32/jmpbuf.h
@@ -0,0 +1,37 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+   Copied from libunwind-x86_64.h, modified slightly for building
+   frysk successfully on ppc64, by Wu Zhou <woodzltc@cn.ibm.com>
+   Will be replaced when libunwind is ready on ppc64 platform.
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* Use glibc's jump-buffer indices; NPTL peeks at SP: */
+
+#define JB_SP           6
+#define JB_RP           7
+#define JB_MASK_SAVED   8
+#define JB_MASK         9
diff --git a/src/third_party/unwind/dist/include/tdep-ppc32/libunwind_i.h b/src/third_party/unwind/dist/include/tdep-ppc32/libunwind_i.h
new file mode 100644
index 00000000000..4cf6d135f63
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-ppc32/libunwind_i.h
@@ -0,0 +1,314 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+   Copied from libunwind-x86_64.h, modified slightly for building
+   frysk successfully on ppc64, by Wu Zhou <woodzltc@cn.ibm.com>
+   Will be replaced when libunwind is ready on ppc64 platform.
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef PPC32_LIBUNWIND_I_H
+#define PPC32_LIBUNWIND_I_H
+
+/* Target-dependent definitions that are internal to libunwind but need
+   to be shared with target-independent code.  */
+
+#include <stdlib.h>
+#include <libunwind.h>
+
+#include "elf32.h"
+#include "mempool.h"
+#include "dwarf.h"
+
+typedef struct
+  {
+    /* no ppc32-specific fast trace */
+  }
+unw_tdep_frame_t;
+
+struct unw_addr_space
+{
+  struct unw_accessors acc;
+  unw_caching_policy_t caching_policy;
+#ifdef HAVE_ATOMIC_OPS_H
+  AO_t cache_generation;
+#else
+  uint32_t cache_generation;
+#endif
+  unw_word_t dyn_generation;    /* see dyn-common.h */
+  unw_word_t dyn_info_list_addr;        /* (cached) dyn_info_list_addr */
+  struct dwarf_rs_cache global_cache;
+  struct unw_debug_frame_list *debug_frames;
+  int validate;
+};
+
+struct cursor
+{
+  struct dwarf_cursor dwarf;    /* must be first */
+
+  /* Format of sigcontext structure and address at which it is
+     stored: */
+  enum
+  {
+    PPC_SCF_NONE,               /* no signal frame encountered */
+    PPC_SCF_LINUX_RT_SIGFRAME   /* POSIX ucontext_t */
+  }
+  sigcontext_format;
+  unw_word_t sigcontext_addr;
+};
+
+#define DWARF_GET_LOC(l)        ((l).val)
+
+#ifdef UNW_LOCAL_ONLY
+# define DWARF_NULL_LOC         DWARF_LOC (0, 0)
+# define DWARF_IS_NULL_LOC(l)   (DWARF_GET_LOC (l) == 0)
+# define DWARF_LOC(r, t)        ((dwarf_loc_t) { .val = (r) })
+# define DWARF_IS_REG_LOC(l)    0
+# define DWARF_IS_FP_LOC(l)     0
+# define DWARF_IS_V_LOC(l)      0
+# define DWARF_MEM_LOC(c,m)     DWARF_LOC ((m), 0)
+# define DWARF_REG_LOC(c,r)     (DWARF_LOC((unw_word_t)                      \
+                                 tdep_uc_addr((c)->as_arg, (r)), 0))
+# define DWARF_FPREG_LOC(c,r)   (DWARF_LOC((unw_word_t)                      \
+                                 tdep_uc_addr((c)->as_arg, (r)), 0))
+# define DWARF_VREG_LOC(c,r)    (DWARF_LOC((unw_word_t)                      \
+                                 tdep_uc_addr((c)->as_arg, (r)), 0))
+#else /* !UNW_LOCAL_ONLY */
+
+# define DWARF_LOC_TYPE_FP      (1 << 0)
+# define DWARF_LOC_TYPE_REG     (1 << 1)
+# define DWARF_LOC_TYPE_V       (1 << 2)
+# define DWARF_NULL_LOC         DWARF_LOC (0, 0)
+# define DWARF_IS_NULL_LOC(l)                                           \
+                ({ dwarf_loc_t _l = (l); _l.val == 0 && _l.type == 0; })
+# define DWARF_LOC(r, t)        ((dwarf_loc_t) { .val = (r), .type = (t) })
+# define DWARF_IS_REG_LOC(l)    (((l).type & DWARF_LOC_TYPE_REG) != 0)
+# define DWARF_IS_FP_LOC(l)     (((l).type & DWARF_LOC_TYPE_FP) != 0)
+# define DWARF_IS_V_LOC(l)      (((l).type & DWARF_LOC_TYPE_V) != 0)
+# define DWARF_MEM_LOC(c,m)     DWARF_LOC ((m), 0)
+# define DWARF_REG_LOC(c,r)     DWARF_LOC((r), DWARF_LOC_TYPE_REG)
+# define DWARF_FPREG_LOC(c,r)   DWARF_LOC((r), (DWARF_LOC_TYPE_REG      \
+                                                | DWARF_LOC_TYPE_FP))
+# define DWARF_VREG_LOC(c,r)    DWARF_LOC((r), (DWARF_LOC_TYPE_REG      \
+                                                | DWARF_LOC_TYPE_V))
+
+#endif /* !UNW_LOCAL_ONLY */
+
+static inline int
+dwarf_getvr (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t * val)
+{
+  unw_word_t *valp = (unw_word_t *) val;
+  unw_word_t addr;
+  int ret;
+
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  assert (DWARF_IS_V_LOC (loc));
+  assert (!DWARF_IS_FP_LOC (loc));
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
+                                      val, 0, c->as_arg);
+
+  addr = DWARF_GET_LOC (loc);
+
+  if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, valp,
+                                       0, c->as_arg)) < 0)
+    return ret;
+
+  return (*c->as->acc.access_mem) (c->as, addr + 8, valp + 1, 0, c->as_arg);
+}
+
+static inline int
+dwarf_putvr (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
+{
+  unw_word_t *valp = (unw_word_t *) & val;
+  unw_word_t addr;
+  int ret;
+
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  assert (DWARF_IS_V_LOC (loc));
+  assert (!DWARF_IS_FP_LOC (loc));
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
+                                      &val, 1, c->as_arg);
+
+  addr = DWARF_GET_LOC (loc);
+  if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, valp,
+                                       1, c->as_arg)) < 0)
+    return ret;
+
+  return (*c->as->acc.access_mem) (c->as, addr + 8, valp + 1, 1, c->as_arg);
+}
+
+static inline int
+dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t * val)
+{
+  unw_word_t *valp = (unw_word_t *) val;
+  unw_word_t addr;
+
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  assert (DWARF_IS_FP_LOC (loc));
+  assert (!DWARF_IS_V_LOC (loc));
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
+                                       val, 0, c->as_arg);
+
+  addr = DWARF_GET_LOC (loc);
+  return (*c->as->acc.access_mem) (c->as, addr + 0, valp, 0, c->as_arg);
+
+}
+
+static inline int
+dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
+{
+  unw_word_t *valp = (unw_word_t *) & val;
+  unw_word_t addr;
+
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  assert (DWARF_IS_FP_LOC (loc));
+  assert (!DWARF_IS_V_LOC (loc));
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
+                                       &val, 1, c->as_arg);
+
+  addr = DWARF_GET_LOC (loc);
+
+  return (*c->as->acc.access_mem) (c->as, addr + 0, valp, 1, c->as_arg);
+}
+
+static inline int
+dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t * val)
+{
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  /* If a code-generator were to save a value of type unw_word_t in a
+     floating-point register, we would have to support this case.  I
+     suppose it could happen with MMX registers, but does it really
+     happen?  */
+  assert (!DWARF_IS_FP_LOC (loc));
+  assert (!DWARF_IS_V_LOC (loc));
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), val,
+                                     0, c->as_arg);
+  else
+    return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), val,
+                                     0, c->as_arg);
+}
+
+static inline int
+dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
+{
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  /* If a code-generator were to save a value of type unw_word_t in a
+     floating-point register, we would have to support this case.  I
+     suppose it could happen with MMX registers, but does it really
+     happen?  */
+  assert (!DWARF_IS_FP_LOC (loc));
+  assert (!DWARF_IS_V_LOC (loc));
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), &val,
+                                     1, c->as_arg);
+  else
+    return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), &val,
+                                     1, c->as_arg);
+}
+
+#define tdep_getcontext_trace           unw_getcontext
+#define tdep_init_done                  UNW_OBJ(init_done)
+#define tdep_init                       UNW_OBJ(init)
+/* Platforms that support UNW_INFO_FORMAT_TABLE need to define
+   tdep_search_unwind_table.  */
+#define tdep_search_unwind_table        dwarf_search_unwind_table
+#define tdep_find_unwind_table          dwarf_find_unwind_table
+#define tdep_uc_addr                    UNW_ARCH_OBJ(uc_addr)
+#define tdep_get_elf_image              UNW_ARCH_OBJ(get_elf_image)
+#define tdep_get_exe_image_path         UNW_ARCH_OBJ(get_exe_image_path)
+#define tdep_access_reg                 UNW_OBJ(access_reg)
+#define tdep_access_fpreg               UNW_OBJ(access_fpreg)
+#define tdep_fetch_frame(c,ip,n)        do {} while(0)
+#define tdep_cache_frame(c)             0
+#define tdep_reuse_frame(c,frame)       do {} while(0)
+#define tdep_stash_frame(c,rs)          do {} while(0)
+#define tdep_trace(cur,addr,n)          (-UNW_ENOINFO)
+#define tdep_get_func_addr              UNW_OBJ(get_func_addr)
+
+#ifdef UNW_LOCAL_ONLY
+# define tdep_find_proc_info(c,ip,n)                            \
+        dwarf_find_proc_info((c)->as, (ip), &(c)->pi, (n),      \
+                                       (c)->as_arg)
+# define tdep_put_unwind_info(as,pi,arg)                \
+        dwarf_put_unwind_info((as), (pi), (arg))
+#else
+# define tdep_find_proc_info(c,ip,n)                                    \
+        (*(c)->as->acc.find_proc_info)((c)->as, (ip), &(c)->pi, (n),    \
+                                       (c)->as_arg)
+# define tdep_put_unwind_info(as,pi,arg)                        \
+        (*(as)->acc.put_unwind_info)((as), (pi), (arg))
+#endif
+
+extern int tdep_fetch_proc_info_post (struct dwarf_cursor *c, unw_word_t ip,
+                                      int need_unwind_info);
+
+#define tdep_get_as(c)                  ((c)->dwarf.as)
+#define tdep_get_as_arg(c)              ((c)->dwarf.as_arg)
+#define tdep_get_ip(c)                  ((c)->dwarf.ip)
+#define tdep_big_endian(as)             1
+
+extern int tdep_init_done;
+
+extern void tdep_init (void);
+extern int tdep_search_unwind_table (unw_addr_space_t as, unw_word_t ip,
+                                     unw_dyn_info_t * di,
+                                     unw_proc_info_t * pi,
+                                     int need_unwind_info, void *arg);
+extern void *tdep_uc_addr (ucontext_t * uc, int reg);
+extern int tdep_get_elf_image (struct elf_image *ei, pid_t pid, unw_word_t ip,
+                               unsigned long *segbase, unsigned long *mapoff,
+                               char *path, size_t pathlen);
+extern void tdep_get_exe_image_path (char *path);
+extern int tdep_access_reg (struct cursor *c, unw_regnum_t reg,
+                            unw_word_t * valp, int write);
+extern int tdep_access_fpreg (struct cursor *c, unw_regnum_t reg,
+                              unw_fpreg_t * valp, int write);
+extern int tdep_get_func_addr (unw_addr_space_t as, unw_word_t addr,
+                               unw_word_t *entry_point);
+
+#endif /* PPC64_LIBUNWIND_I_H */
diff --git a/src/third_party/unwind/dist/include/tdep-ppc64/dwarf-config.h b/src/third_party/unwind/dist/include/tdep-ppc64/dwarf-config.h
new file mode 100644
index 00000000000..6d8ef0a9404
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-ppc64/dwarf-config.h
@@ -0,0 +1,56 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+   Copied from libunwind-x86_64.h, modified slightly for building
+   frysk successfully on ppc64, by Wu Zhou <woodzltc@cn.ibm.com>
+   Will be replaced when libunwind is ready on ppc64 platform.
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef dwarf_config_h
+#define dwarf_config_h
+
+/* For PPC64, 48 GPRs + 33 FPRs + 33 AltiVec + 1 SPE  */
+#define DWARF_NUM_PRESERVED_REGS        115
+
+#define DWARF_REGNUM_MAP_LENGTH         115
+
+/* Return TRUE if the ADDR_SPACE uses big-endian byte-order.  */
+#define dwarf_is_big_endian(addr_space) ((addr_space)->big_endian)
+
+/* Convert a pointer to a dwarf_cursor structure to a pointer to
+   unw_cursor_t.  */
+#define dwarf_to_cursor(c)      ((unw_cursor_t *) (c))
+
+typedef struct dwarf_loc
+  {
+    unw_word_t val;
+#ifndef UNW_LOCAL_ONLY
+    unw_word_t type;            /* see X86_LOC_TYPE_* macros.  */
+#endif
+  }
+dwarf_loc_t;
+
+#endif /* dwarf_config_h */
diff --git a/src/third_party/unwind/dist/include/tdep-ppc64/jmpbuf.h b/src/third_party/unwind/dist/include/tdep-ppc64/jmpbuf.h
new file mode 100644
index 00000000000..861e94d9712
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-ppc64/jmpbuf.h
@@ -0,0 +1,37 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+   Copied from libunwind-x86_64.h, modified slightly for building
+   frysk successfully on ppc64, by Wu Zhou <woodzltc@cn.ibm.com>
+   Will be replaced when libunwind is ready on ppc64 platform.
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* Use glibc's jump-buffer indices; NPTL peeks at SP: */
+
+#define JB_SP           6
+#define JB_RP           7
+#define JB_MASK_SAVED   8
+#define JB_MASK         9
diff --git a/src/third_party/unwind/dist/include/tdep-ppc64/libunwind_i.h b/src/third_party/unwind/dist/include/tdep-ppc64/libunwind_i.h
new file mode 100644
index 00000000000..975f3bb3662
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-ppc64/libunwind_i.h
@@ -0,0 +1,369 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+   Copied from libunwind-x86_64.h, modified slightly for building
+   frysk successfully on ppc64, by Wu Zhou <woodzltc@cn.ibm.com>
+   Will be replaced when libunwind is ready on ppc64 platform.
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef PPC64_LIBUNWIND_I_H
+#define PPC64_LIBUNWIND_I_H
+
+/* Target-dependent definitions that are internal to libunwind but need
+   to be shared with target-independent code.  */
+
+#include <stdlib.h>
+#include <libunwind.h>
+
+#include "elf64.h"
+#include "mempool.h"
+#include "dwarf.h"
+
+typedef struct
+  {
+    /* no ppc64-specific fast trace */
+  }
+unw_tdep_frame_t;
+
+struct unw_addr_space
+{
+  struct unw_accessors acc;
+  int big_endian;
+  ppc64_abi_t abi;
+  unw_caching_policy_t caching_policy;
+#ifdef HAVE_ATOMIC_OPS_H
+  AO_t cache_generation;
+#else
+  uint32_t cache_generation;
+#endif
+  unw_word_t dyn_generation;    /* see dyn-common.h */
+  unw_word_t dyn_info_list_addr;        /* (cached) dyn_info_list_addr */
+  struct dwarf_rs_cache global_cache;
+  struct unw_debug_frame_list *debug_frames;
+  int validate;
+};
+
+struct cursor
+{
+  struct dwarf_cursor dwarf;    /* must be first */
+
+  /* Format of sigcontext structure and address at which it is
+     stored: */
+  enum
+  {
+    PPC_SCF_NONE,               /* no signal frame encountered */
+    PPC_SCF_LINUX_RT_SIGFRAME   /* POSIX ucontext_t */
+  }
+  sigcontext_format;
+  unw_word_t sigcontext_addr;
+};
+
+#define DWARF_GET_LOC(l)        ((l).val)
+
+#ifdef UNW_LOCAL_ONLY
+# define DWARF_NULL_LOC         DWARF_LOC (0, 0)
+# define DWARF_IS_NULL_LOC(l)   (DWARF_GET_LOC (l) == 0)
+# define DWARF_LOC(r, t)        ((dwarf_loc_t) { .val = (r) })
+# define DWARF_IS_REG_LOC(l)    0
+# define DWARF_REG_LOC(c,r)     (DWARF_LOC((unw_word_t)                      \
+                                 tdep_uc_addr((c)->as_arg, (r)), 0))
+# define DWARF_MEM_LOC(c,m)     DWARF_LOC ((m), 0)
+# define DWARF_FPREG_LOC(c,r)   (DWARF_LOC((unw_word_t)                      \
+                                 tdep_uc_addr((c)->as_arg, (r)), 0))
+# define DWARF_VREG_LOC(c,r)    (DWARF_LOC((unw_word_t)                      \
+                                 tdep_uc_addr((c)->as_arg, (r)), 0))
+
+static inline int
+dwarf_getvr (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t * val)
+{
+  if (!DWARF_GET_LOC (loc))
+    return -1;
+  *val = *(unw_fpreg_t *) DWARF_GET_LOC (loc);
+  return 0;
+}
+
+static inline int
+dwarf_putvr (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
+{
+  if (!DWARF_GET_LOC (loc))
+    return -1;
+  *(unw_fpreg_t *) DWARF_GET_LOC (loc) = val;
+  return 0;
+}
+
+static inline int
+dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val)
+{
+  if (!DWARF_GET_LOC (loc))
+    return -1;
+  *val = *(unw_fpreg_t *) DWARF_GET_LOC (loc);
+  return 0;
+}
+
+static inline int
+dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
+{
+  if (!DWARF_GET_LOC (loc))
+    return -1;
+  *(unw_fpreg_t *) DWARF_GET_LOC (loc) = val;
+  return 0;
+}
+
+static inline int
+dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val)
+{
+  if (!DWARF_GET_LOC (loc))
+    return -1;
+  *val = *(unw_word_t *) DWARF_GET_LOC (loc);
+  return 0;
+}
+
+static inline int
+dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
+{
+  if (!DWARF_GET_LOC (loc))
+    return -1;
+  *(unw_word_t *) DWARF_GET_LOC (loc) = val;
+  return 0;
+}
+
+#else /* !UNW_LOCAL_ONLY */
+
+# define DWARF_LOC_TYPE_FP      (1 << 0)
+# define DWARF_LOC_TYPE_REG     (1 << 1)
+# define DWARF_LOC_TYPE_V       (1 << 2)
+# define DWARF_NULL_LOC         DWARF_LOC (0, 0)
+# define DWARF_IS_NULL_LOC(l)                                           \
+                ({ dwarf_loc_t _l = (l); _l.val == 0 && _l.type == 0; })
+# define DWARF_LOC(r, t)        ((dwarf_loc_t) { .val = (r), .type = (t) })
+# define DWARF_IS_REG_LOC(l)    (((l).type & DWARF_LOC_TYPE_REG) != 0)
+# define DWARF_IS_FP_LOC(l)     (((l).type & DWARF_LOC_TYPE_FP) != 0)
+# define DWARF_IS_V_LOC(l)      (((l).type & DWARF_LOC_TYPE_V) != 0)
+# define DWARF_MEM_LOC(c,m)     DWARF_LOC ((m), 0)
+# define DWARF_REG_LOC(c,r)     DWARF_LOC((r), DWARF_LOC_TYPE_REG)
+# define DWARF_FPREG_LOC(c,r)   DWARF_LOC((r), (DWARF_LOC_TYPE_REG      \
+                                                | DWARF_LOC_TYPE_FP))
+# define DWARF_VREG_LOC(c,r)    DWARF_LOC((r), (DWARF_LOC_TYPE_REG      \
+                                                | DWARF_LOC_TYPE_V))
+
+static inline int
+dwarf_getvr (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t * val)
+{
+  unw_word_t *valp = (unw_word_t *) val;
+  unw_word_t addr;
+  int ret;
+
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  assert (DWARF_IS_V_LOC (loc));
+  assert (!DWARF_IS_FP_LOC (loc));
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
+                                      val, 0, c->as_arg);
+
+  addr = DWARF_GET_LOC (loc);
+
+  if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, valp,
+                                       0, c->as_arg)) < 0)
+    return ret;
+
+  return (*c->as->acc.access_mem) (c->as, addr + 8, valp + 1, 0, c->as_arg);
+}
+
+static inline int
+dwarf_putvr (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
+{
+  unw_word_t *valp = (unw_word_t *) & val;
+  unw_word_t addr;
+  int ret;
+
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  assert (DWARF_IS_V_LOC (loc));
+  assert (!DWARF_IS_FP_LOC (loc));
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
+                                      &val, 1, c->as_arg);
+
+  addr = DWARF_GET_LOC (loc);
+  if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, valp,
+                                       1, c->as_arg)) < 0)
+    return ret;
+
+  return (*c->as->acc.access_mem) (c->as, addr + 8, valp + 1, 1, c->as_arg);
+}
+
+static inline int
+dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t * val)
+{
+  unw_word_t *valp = (unw_word_t *) val;
+  unw_word_t addr;
+
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  assert (DWARF_IS_FP_LOC (loc));
+  assert (!DWARF_IS_V_LOC (loc));
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
+                                       val, 0, c->as_arg);
+
+  addr = DWARF_GET_LOC (loc);
+  return (*c->as->acc.access_mem) (c->as, addr + 0, valp, 0, c->as_arg);
+
+}
+
+static inline int
+dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
+{
+  unw_word_t *valp = (unw_word_t *) & val;
+  unw_word_t addr;
+
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  assert (DWARF_IS_FP_LOC (loc));
+  assert (!DWARF_IS_V_LOC (loc));
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
+                                       &val, 1, c->as_arg);
+
+  addr = DWARF_GET_LOC (loc);
+
+  return (*c->as->acc.access_mem) (c->as, addr + 0, valp, 1, c->as_arg);
+}
+
+static inline int
+dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t * val)
+{
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  /* If a code-generator were to save a value of type unw_word_t in a
+     floating-point register, we would have to support this case.  I
+     suppose it could happen with MMX registers, but does it really
+     happen?  */
+  assert (!DWARF_IS_FP_LOC (loc));
+  assert (!DWARF_IS_V_LOC (loc));
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), val,
+                                     0, c->as_arg);
+  else
+    return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), val,
+                                     0, c->as_arg);
+}
+
+static inline int
+dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
+{
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  /* If a code-generator were to save a value of type unw_word_t in a
+     floating-point register, we would have to support this case.  I
+     suppose it could happen with MMX registers, but does it really
+     happen?  */
+  assert (!DWARF_IS_FP_LOC (loc));
+  assert (!DWARF_IS_V_LOC (loc));
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), &val,
+                                     1, c->as_arg);
+  else
+    return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), &val,
+                                     1, c->as_arg);
+}
+
+#endif /* !UNW_LOCAL_ONLY */
+
+#define tdep_getcontext_trace           unw_getcontext
+#define tdep_init_done                  UNW_OBJ(init_done)
+#define tdep_init                       UNW_OBJ(init)
+/* Platforms that support UNW_INFO_FORMAT_TABLE need to define
+   tdep_search_unwind_table.  */
+#define tdep_search_unwind_table        dwarf_search_unwind_table
+#define tdep_find_unwind_table          dwarf_find_unwind_table
+#define tdep_uc_addr                    UNW_ARCH_OBJ(uc_addr)
+#define tdep_get_elf_image              UNW_ARCH_OBJ(get_elf_image)
+#define tdep_get_exe_image_path         UNW_ARCH_OBJ(get_exe_image_path)
+#define tdep_access_reg                 UNW_OBJ(access_reg)
+#define tdep_access_fpreg               UNW_OBJ(access_fpreg)
+#define tdep_fetch_frame(c,ip,n)        do {} while(0)
+#define tdep_cache_frame(c)             0
+#define tdep_reuse_frame(c,frame)       do {} while(0)
+#define tdep_stash_frame(c,rs)          do {} while(0)
+#define tdep_trace(cur,addr,n)          (-UNW_ENOINFO)
+#define tdep_get_func_addr              UNW_OBJ(get_func_addr)
+
+#ifdef UNW_LOCAL_ONLY
+# define tdep_find_proc_info(c,ip,n)                            \
+        dwarf_find_proc_info((c)->as, (ip), &(c)->pi, (n),      \
+                                       (c)->as_arg)
+# define tdep_put_unwind_info(as,pi,arg)                \
+        dwarf_put_unwind_info((as), (pi), (arg))
+#else
+# define tdep_find_proc_info(c,ip,n)                                    \
+        (*(c)->as->acc.find_proc_info)((c)->as, (ip), &(c)->pi, (n),    \
+                                       (c)->as_arg)
+# define tdep_put_unwind_info(as,pi,arg)                        \
+        (*(as)->acc.put_unwind_info)((as), (pi), (arg))
+#endif
+
+extern int tdep_fetch_proc_info_post (struct dwarf_cursor *c, unw_word_t ip,
+                                      int need_unwind_info);
+
+#define tdep_get_as(c)                  ((c)->dwarf.as)
+#define tdep_get_as_arg(c)              ((c)->dwarf.as_arg)
+#define tdep_get_ip(c)                  ((c)->dwarf.ip)
+#define tdep_big_endian(as)             ((as)->big_endian)
+
+extern int tdep_init_done;
+
+extern void tdep_init (void);
+extern int tdep_search_unwind_table (unw_addr_space_t as, unw_word_t ip,
+                                     unw_dyn_info_t * di,
+                                     unw_proc_info_t * pi,
+                                     int need_unwind_info, void *arg);
+extern void *tdep_uc_addr (ucontext_t * uc, int reg);
+extern int tdep_get_elf_image (struct elf_image *ei, pid_t pid, unw_word_t ip,
+                               unsigned long *segbase, unsigned long *mapoff,
+                               char *path, size_t pathlen);
+extern void tdep_get_exe_image_path (char *path);
+extern int tdep_access_reg (struct cursor *c, unw_regnum_t reg,
+                            unw_word_t * valp, int write);
+extern int tdep_access_fpreg (struct cursor *c, unw_regnum_t reg,
+                              unw_fpreg_t * valp, int write);
+extern int tdep_get_func_addr (unw_addr_space_t as, unw_word_t addr,
+                               unw_word_t *entry_point);
+
+#endif /* PPC64_LIBUNWIND_I_H */
diff --git a/src/third_party/unwind/dist/include/tdep-s390x/dwarf-config.h b/src/third_party/unwind/dist/include/tdep-s390x/dwarf-config.h
new file mode 100644
index 00000000000..ca419bd52ac
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-s390x/dwarf-config.h
@@ -0,0 +1,52 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2003, 2005 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* copy of include/tdep-x86/dwarf-config.h, modified slightly for x86-64
+   some consolidation is possible here */
+
+#ifndef dwarf_config_h
+#define dwarf_config_h
+
+/* derived from DWARF register mappings in Z ELF ABI */
+#define DWARF_NUM_PRESERVED_REGS        66
+#define DWARF_REGNUM_MAP_LENGTH         DWARF_NUM_PRESERVED_REGS
+
+/* Return TRUE if the ADDR_SPACE uses big-endian byte-order.  */
+#define dwarf_is_big_endian(addr_space) 1
+
+/* Convert a pointer to a dwarf_cursor structure to a pointer to
+   unw_cursor_t.  */
+#define dwarf_to_cursor(c)      ((unw_cursor_t *) (c))
+
+typedef struct dwarf_loc
+  {
+    unw_word_t val;
+    unw_word_t type;            /* see S390X_LOC_TYPE_* macros.  */
+  }
+dwarf_loc_t;
+
+#endif /* dwarf_config_h */
diff --git a/src/third_party/unwind/dist/include/tdep-s390x/jmpbuf.h b/src/third_party/unwind/dist/include/tdep-s390x/jmpbuf.h
new file mode 100644
index 00000000000..50923752555
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-s390x/jmpbuf.h
@@ -0,0 +1,35 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#if defined __linux__
+
+/* Use glibc's jump-buffer indices; NPTL peeks at SP: */
+
+#define JB_SP           9  // __gregs[9]
+#define JB_RP           8  // __gregs[8]
+#define JB_MASK_SAVED   18 // __mask_was_saved
+#define JB_MASK         19 // __saved_mask
+
+#endif
diff --git a/src/third_party/unwind/dist/include/tdep-s390x/libunwind_i.h b/src/third_party/unwind/dist/include/tdep-s390x/libunwind_i.h
new file mode 100644
index 00000000000..137a0b8a4f9
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-s390x/libunwind_i.h
@@ -0,0 +1,262 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002-2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef S390X_LIBUNWIND_I_H
+#define S390X_LIBUNWIND_I_H
+
+/* Target-dependent definitions that are internal to libunwind but need
+   to be shared with target-independent code.  */
+
+#include <stdlib.h>
+#include <libunwind.h>
+
+#include "elf64.h"
+#include "mempool.h"
+#include "dwarf.h"
+
+struct unw_addr_space
+  {
+    struct unw_accessors acc;
+    unw_caching_policy_t caching_policy;
+#ifdef HAVE_ATOMIC_OPS_H
+    AO_t cache_generation;
+#else
+    uint32_t cache_generation;
+#endif
+    unw_word_t dyn_generation;          /* see dyn-common.h */
+    unw_word_t dyn_info_list_addr;      /* (cached) dyn_info_list_addr */
+    struct dwarf_rs_cache global_cache;
+    struct unw_debug_frame_list *debug_frames;
+   };
+
+struct cursor
+  {
+    struct dwarf_cursor dwarf;          /* must be first */
+
+    /* Format of sigcontext structure and address at which it is
+       stored: */
+    enum
+      {
+        S390X_SCF_NONE              = 0, /* no signal frame encountered */
+        S390X_SCF_LINUX_SIGFRAME    = 1, /* Linux struct sigcontext */
+        S390X_SCF_LINUX_RT_SIGFRAME = 2, /* Linux ucontext_t */
+      }
+    sigcontext_format;
+    unw_word_t sigcontext_addr;
+    unw_word_t sigcontext_sp;
+    unw_word_t sigcontext_pc;
+    int validate;
+    ucontext_t *uc;
+  };
+
+static inline ucontext_t *
+dwarf_get_uc(const struct dwarf_cursor *cursor)
+{
+  const struct cursor *c = (struct cursor *) cursor->as_arg;
+  return c->uc;
+}
+
+#define DWARF_GET_LOC(l)        ((l).val)
+# define DWARF_LOC_TYPE_MEM     (0 << 0)
+# define DWARF_LOC_TYPE_FP      (1 << 0)
+# define DWARF_LOC_TYPE_REG     (1 << 1)
+# define DWARF_LOC_TYPE_VAL     (1 << 2)
+
+# define DWARF_IS_REG_LOC(l)    (((l).type & DWARF_LOC_TYPE_REG) != 0)
+# define DWARF_IS_FP_LOC(l)     (((l).type & DWARF_LOC_TYPE_FP) != 0)
+# define DWARF_IS_MEM_LOC(l)    ((l).type == DWARF_LOC_TYPE_MEM)
+# define DWARF_IS_VAL_LOC(l)    (((l).type & DWARF_LOC_TYPE_VAL) != 0)
+
+# define DWARF_LOC(r, t)        ((dwarf_loc_t) { .val = (r), .type = (t) })
+# define DWARF_VAL_LOC(c,v)     DWARF_LOC ((v), DWARF_LOC_TYPE_VAL)
+# define DWARF_MEM_LOC(c,m)     DWARF_LOC ((m), DWARF_LOC_TYPE_MEM)
+
+#ifdef UNW_LOCAL_ONLY
+# define DWARF_NULL_LOC         DWARF_LOC (0, 0)
+# define DWARF_IS_NULL_LOC(l)   (DWARF_GET_LOC (l) == 0)
+# define DWARF_REG_LOC(c,r)     (DWARF_LOC((unw_word_t)                      \
+                                 tdep_uc_addr(dwarf_get_uc(c), (r)), 0))
+# define DWARF_FPREG_LOC(c,r)   (DWARF_LOC((unw_word_t)                      \
+                                 tdep_uc_addr(dwarf_get_uc(c), (r)), 0))
+
+#else /* !UNW_LOCAL_ONLY */
+
+# define DWARF_NULL_LOC         DWARF_LOC (0, 0)
+# define DWARF_IS_NULL_LOC(l)                                           \
+                ({ dwarf_loc_t _l = (l); _l.val == 0 && _l.type == 0; })
+# define DWARF_REG_LOC(c,r)     DWARF_LOC((r), DWARF_LOC_TYPE_REG)
+# define DWARF_FPREG_LOC(c,r)   DWARF_LOC((r), (DWARF_LOC_TYPE_REG      \
+                                                | DWARF_LOC_TYPE_FP))
+
+#endif /* !UNW_LOCAL_ONLY */
+
+static inline int
+dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val)
+{
+  assert(sizeof(unw_fpreg_t) == sizeof(unw_word_t));
+
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  if (DWARF_IS_FP_LOC (loc))
+    return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc), val,
+                                       0, c->as_arg);
+  /* FPRs may be saved in GPRs */
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), (unw_word_t*)val,
+                                     0, c->as_arg);
+  if (DWARF_IS_MEM_LOC (loc))
+    return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), (unw_word_t*)val,
+                                     0, c->as_arg);
+  assert(DWARF_IS_VAL_LOC (loc));
+  *val = *(unw_fpreg_t*) DWARF_GET_LOC (loc);
+  return 0;
+}
+
+static inline int
+dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
+{
+  assert(sizeof(unw_fpreg_t) == sizeof(unw_word_t));
+  assert(!DWARF_IS_VAL_LOC (loc));
+
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  if (DWARF_IS_FP_LOC (loc))
+    return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc), &val,
+                                       1, c->as_arg);
+  /* FPRs may be saved in GPRs */
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), (unw_word_t*) &val,
+                                     1, c->as_arg);
+
+  assert(DWARF_IS_MEM_LOC (loc));
+  return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), (unw_word_t*) &val,
+                                   1, c->as_arg);
+}
+
+static inline int
+dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val)
+{
+  assert(sizeof(unw_fpreg_t) == sizeof(unw_word_t));
+
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), val,
+                                     0, c->as_arg);
+  if (DWARF_IS_MEM_LOC (loc))
+    return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), val,
+                                     0, c->as_arg);
+  /* GPRs may be saved in FPRs */
+  if (DWARF_IS_FP_LOC (loc))
+    return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc), (unw_fpreg_t*)val,
+                                       0, c->as_arg);
+  assert(DWARF_IS_VAL_LOC (loc));
+  *val = DWARF_GET_LOC (loc);
+  return 0;
+}
+
+static inline int
+dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
+{
+  assert(sizeof(unw_fpreg_t) == sizeof(unw_word_t));
+  assert(!DWARF_IS_VAL_LOC (loc));
+
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), &val,
+                                     1, c->as_arg);
+  /* GPRs may be saved in FPRs */
+  if (DWARF_IS_FP_LOC (loc))
+    return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc), (unw_fpreg_t*) &val,
+                                       1, c->as_arg);
+
+  assert(DWARF_IS_MEM_LOC (loc));
+  return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), &val,
+                                   1, c->as_arg);
+}
+
+#define tdep_getcontext_trace           unw_getcontext
+#define tdep_init_done                  UNW_OBJ(init_done)
+#define tdep_init_mem_validate          UNW_OBJ(init_mem_validate)
+#define tdep_init                       UNW_OBJ(init)
+/* Platforms that support UNW_INFO_FORMAT_TABLE need to define
+   tdep_search_unwind_table.  */
+#define tdep_search_unwind_table        dwarf_search_unwind_table
+#define tdep_find_unwind_table          dwarf_find_unwind_table
+#define tdep_get_elf_image              UNW_ARCH_OBJ(get_elf_image)
+#define tdep_get_exe_image_path         UNW_ARCH_OBJ(get_exe_image_path)
+#define tdep_access_reg                 UNW_OBJ(access_reg)
+#define tdep_access_fpreg               UNW_OBJ(access_fpreg)
+#define tdep_fetch_frame(c,ip,n)        do {} while(0)
+#define tdep_cache_frame(c)             0
+#define tdep_reuse_frame(c,rs)          do {} while(0)
+#define tdep_stash_frame(cs,rs)         do {} while(0)
+#define tdep_trace(cur,addr,n)          (-UNW_ENOINFO)
+#define tdep_uc_addr                    UNW_OBJ(uc_addr)
+
+#ifdef UNW_LOCAL_ONLY
+# define tdep_find_proc_info(c,ip,n)                            \
+        dwarf_find_proc_info((c)->as, (ip), &(c)->pi, (n),      \
+                                       (c)->as_arg)
+# define tdep_put_unwind_info(as,pi,arg)                \
+        dwarf_put_unwind_info((as), (pi), (arg))
+#else
+# define tdep_find_proc_info(c,ip,n)                                    \
+        (*(c)->as->acc.find_proc_info)((c)->as, (ip), &(c)->pi, (n),    \
+                                       (c)->as_arg)
+# define tdep_put_unwind_info(as,pi,arg)                        \
+        (*(as)->acc.put_unwind_info)((as), (pi), (arg))
+#endif
+
+#define tdep_get_as(c)                  ((c)->dwarf.as)
+#define tdep_get_as_arg(c)              ((c)->dwarf.as_arg)
+#define tdep_get_ip(c)                  ((c)->dwarf.ip)
+#define tdep_big_endian(as)             1
+
+extern int tdep_init_done;
+
+extern void tdep_init (void);
+extern void tdep_init_mem_validate (void);
+extern int tdep_search_unwind_table (unw_addr_space_t as, unw_word_t ip,
+                                     unw_dyn_info_t *di, unw_proc_info_t *pi,
+                                     int need_unwind_info, void *arg);
+extern void *tdep_uc_addr (unw_tdep_context_t *uc, int reg);
+extern int tdep_get_elf_image (struct elf_image *ei, pid_t pid, unw_word_t ip,
+                               unsigned long *segbase, unsigned long *mapoff,
+                               char *path, size_t pathlen);
+extern void tdep_get_exe_image_path (char *path);
+extern int tdep_access_reg (struct cursor *c, unw_regnum_t reg,
+                            unw_word_t *valp, int write);
+extern int tdep_access_fpreg (struct cursor *c, unw_regnum_t reg,
+                              unw_fpreg_t *valp, int write);
+
+#endif /* S390X_LIBUNWIND_I_H */
diff --git a/src/third_party/unwind/dist/include/tdep-sh/dwarf-config.h b/src/third_party/unwind/dist/include/tdep-sh/dwarf-config.h
new file mode 100644
index 00000000000..2f76f5be7f4
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-sh/dwarf-config.h
@@ -0,0 +1,49 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef dwarf_config_h
+#define dwarf_config_h
+
+#define DWARF_NUM_PRESERVED_REGS        18
+
+#define dwarf_to_unw_regnum(reg) (((reg) <= UNW_SH_PR) ? (reg) : 0)
+
+/* Return TRUE if the ADDR_SPACE uses big-endian byte-order.  */
+#define dwarf_is_big_endian(addr_space) ((addr_space)->big_endian)
+
+/* Convert a pointer to a dwarf_cursor structure to a pointer to
+   unw_cursor_t.  */
+#define dwarf_to_cursor(c)      ((unw_cursor_t *) (c))
+
+typedef struct dwarf_loc
+  {
+    unw_word_t val;
+#ifndef UNW_LOCAL_ONLY
+    unw_word_t type;            /* see DWARF_LOC_TYPE_* macros.  */
+#endif
+  }
+dwarf_loc_t;
+
+#endif /* dwarf_config_h */
diff --git a/src/third_party/unwind/dist/include/tdep-sh/jmpbuf.h b/src/third_party/unwind/dist/include/tdep-sh/jmpbuf.h
new file mode 100644
index 00000000000..8b44b5b219a
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-sh/jmpbuf.h
@@ -0,0 +1,48 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* Use glibc's jump-buffer indices; NPTL peeks at SP: */
+
+/* SH4 glibc jump buffer contents:
+ *  0. r8
+ *  1. r9
+ *  2. r10
+ *  3. r11
+ *  4. r12
+ *  5. r13
+ *  6. r14
+ *  7. r15
+ *  8. pr/pc
+ *  9. gbr
+ * 10. fpscr
+ * 11. fr12
+ * 12. fr13
+ * 13. fr14
+ * 14. fr15
+ */
+
+#define JB_SP           7
+#define JB_RP           8
+#define JB_MASK_SAVED   15
+#define JB_MASK         16
diff --git a/src/third_party/unwind/dist/include/tdep-sh/libunwind_i.h b/src/third_party/unwind/dist/include/tdep-sh/libunwind_i.h
new file mode 100644
index 00000000000..8ced49104b5
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-sh/libunwind_i.h
@@ -0,0 +1,280 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef SH_LIBUNWIND_I_H
+#define SH_LIBUNWIND_I_H
+
+/* Target-dependent definitions that are internal to libunwind but need
+   to be shared with target-independent code.  */
+
+#include <stdlib.h>
+#include <libunwind.h>
+
+#include "elf32.h"
+#include "mempool.h"
+#include "dwarf.h"
+
+typedef struct
+  {
+    /* no sh-specific fast trace */
+  }
+unw_tdep_frame_t;
+
+struct unw_addr_space
+  {
+    struct unw_accessors acc;
+    int big_endian;
+    unw_caching_policy_t caching_policy;
+#ifdef HAVE_ATOMIC_OPS_H
+    AO_t cache_generation;
+#else
+    uint32_t cache_generation;
+#endif
+    unw_word_t dyn_generation;          /* see dyn-common.h */
+    unw_word_t dyn_info_list_addr;      /* (cached) dyn_info_list_addr */
+    struct dwarf_rs_cache global_cache;
+    struct unw_debug_frame_list *debug_frames;
+  };
+
+struct cursor
+  {
+    struct dwarf_cursor dwarf;          /* must be first */
+    enum
+      {
+        SH_SCF_NONE,                   /* no signal frame */
+        SH_SCF_LINUX_SIGFRAME,         /* non-RT signal frame */
+        SH_SCF_LINUX_RT_SIGFRAME,      /* RT signal frame */
+      }
+    sigcontext_format;
+    unw_word_t sigcontext_addr;
+    unw_word_t sigcontext_sp;
+    unw_word_t sigcontext_pc;
+  };
+
+#define DWARF_GET_LOC(l)        ((l).val)
+
+#ifdef UNW_LOCAL_ONLY
+# define DWARF_NULL_LOC         DWARF_LOC (0, 0)
+# define DWARF_IS_NULL_LOC(l)   (DWARF_GET_LOC (l) == 0)
+# define DWARF_LOC(r, t)        ((dwarf_loc_t) { .val = (r) })
+# define DWARF_IS_REG_LOC(l)    0
+# define DWARF_REG_LOC(c,r)     (DWARF_LOC((unw_word_t)                      \
+                                 tdep_uc_addr((c)->as_arg, (r)), 0))
+# define DWARF_MEM_LOC(c,m)     DWARF_LOC ((m), 0)
+# define DWARF_FPREG_LOC(c,r)   (DWARF_LOC((unw_word_t)                      \
+                                 tdep_uc_addr((c)->as_arg, (r)), 0))
+
+static inline int
+dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val)
+{
+  if (!DWARF_GET_LOC (loc))
+    return -1;
+  *val = *(unw_fpreg_t *) DWARF_GET_LOC (loc);
+  return 0;
+}
+
+static inline int
+dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
+{
+  if (!DWARF_GET_LOC (loc))
+    return -1;
+  *(unw_fpreg_t *) DWARF_GET_LOC (loc) = val;
+  return 0;
+}
+
+static inline int
+dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val)
+{
+  if (!DWARF_GET_LOC (loc))
+    return -1;
+  *val = *(unw_word_t *) DWARF_GET_LOC (loc);
+  return 0;
+}
+
+static inline int
+dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
+{
+  if (!DWARF_GET_LOC (loc))
+    return -1;
+  *(unw_word_t *) DWARF_GET_LOC (loc) = val;
+  return 0;
+}
+
+#else /* !UNW_LOCAL_ONLY */
+# define DWARF_LOC_TYPE_FP      (1 << 0)
+# define DWARF_LOC_TYPE_REG     (1 << 1)
+# define DWARF_NULL_LOC         DWARF_LOC (0, 0)
+# define DWARF_IS_NULL_LOC(l)                                           \
+                ({ dwarf_loc_t _l = (l); _l.val == 0 && _l.type == 0; })
+# define DWARF_LOC(r, t)        ((dwarf_loc_t) { .val = (r), .type = (t) })
+# define DWARF_IS_REG_LOC(l)    (((l).type & DWARF_LOC_TYPE_REG) != 0)
+# define DWARF_IS_FP_LOC(l)     (((l).type & DWARF_LOC_TYPE_FP) != 0)
+# define DWARF_REG_LOC(c,r)     DWARF_LOC((r), DWARF_LOC_TYPE_REG)
+# define DWARF_MEM_LOC(c,m)     DWARF_LOC ((m), 0)
+# define DWARF_FPREG_LOC(c,r)   DWARF_LOC((r), (DWARF_LOC_TYPE_REG      \
+                                                | DWARF_LOC_TYPE_FP))
+
+static inline int
+dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val)
+{
+  char *valp = (char *) &val;
+  unw_word_t addr;
+  int ret;
+
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
+                                       val, 0, c->as_arg);
+
+  addr = DWARF_GET_LOC (loc);
+  if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, (unw_word_t *) valp,
+                                       0, c->as_arg)) < 0)
+    return ret;
+
+  return (*c->as->acc.access_mem) (c->as, addr + 4, (unw_word_t *) valp + 1, 0,
+                                   c->as_arg);
+}
+
+static inline int
+dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
+{
+  char *valp = (char *) &val;
+  unw_word_t addr;
+  int ret;
+
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
+                                       &val, 1, c->as_arg);
+
+  addr = DWARF_GET_LOC (loc);
+  if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, (unw_word_t *) valp,
+                                       1, c->as_arg)) < 0)
+    return ret;
+
+  return (*c->as->acc.access_mem) (c->as, addr + 4, (unw_word_t *) valp + 1,
+                                   1, c->as_arg);
+}
+
+static inline int
+dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val)
+{
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  /* If a code-generator were to save a value of type unw_word_t in a
+     floating-point register, we would have to support this case.  I
+     suppose it could happen with MMX registers, but does it really
+     happen?  */
+  assert (!DWARF_IS_FP_LOC (loc));
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), val,
+                                     0, c->as_arg);
+  else
+    return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), val,
+                                     0, c->as_arg);
+}
+
+static inline int
+dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
+{
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  /* If a code-generator were to save a value of type unw_word_t in a
+     floating-point register, we would have to support this case.  I
+     suppose it could happen with MMX registers, but does it really
+     happen?  */
+  assert (!DWARF_IS_FP_LOC (loc));
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), &val,
+                                     1, c->as_arg);
+  else
+    return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), &val,
+                                     1, c->as_arg);
+}
+
+#endif /* !UNW_LOCAL_ONLY */
+
+#define tdep_getcontext_trace           unw_getcontext
+#define tdep_init_done                  UNW_OBJ(init_done)
+#define tdep_init                       UNW_OBJ(init)
+/* Platforms that support UNW_INFO_FORMAT_TABLE need to define
+   tdep_search_unwind_table.  */
+#define tdep_search_unwind_table        dwarf_search_unwind_table
+#define tdep_find_unwind_table          dwarf_find_unwind_table
+#define tdep_uc_addr                    UNW_ARCH_OBJ(uc_addr)
+#define tdep_get_elf_image              UNW_ARCH_OBJ(get_elf_image)
+#define tdep_get_exe_image_path         UNW_ARCH_OBJ(get_exe_image_path)
+#define tdep_access_reg                 UNW_OBJ(access_reg)
+#define tdep_access_fpreg               UNW_OBJ(access_fpreg)
+#define tdep_fetch_frame(c,ip,n)        do {} while(0)
+#define tdep_cache_frame(c)             0
+#define tdep_reuse_frame(c,frame)       do {} while(0)
+#define tdep_stash_frame(c,rs)          do {} while(0)
+#define tdep_trace(cur,addr,n)          (-UNW_ENOINFO)
+
+#ifdef UNW_LOCAL_ONLY
+# define tdep_find_proc_info(c,ip,n)                            \
+        dwarf_find_proc_info((c)->as, (ip), &(c)->pi, (n),      \
+                                       (c)->as_arg)
+# define tdep_put_unwind_info(as,pi,arg)                \
+        dwarf_put_unwind_info((as), (pi), (arg))
+#else
+# define tdep_find_proc_info(c,ip,n)                                    \
+        (*(c)->as->acc.find_proc_info)((c)->as, (ip), &(c)->pi, (n),    \
+                                       (c)->as_arg)
+# define tdep_put_unwind_info(as,pi,arg)                \
+        (*(as)->acc.put_unwind_info)((as), (pi), (arg))
+#endif
+
+#define tdep_get_as(c)                  ((c)->dwarf.as)
+#define tdep_get_as_arg(c)              ((c)->dwarf.as_arg)
+#define tdep_get_ip(c)                  ((c)->dwarf.ip)
+#define tdep_big_endian(as)             ((as)->big_endian)
+
+extern int tdep_init_done;
+
+extern void tdep_init (void);
+extern int tdep_search_unwind_table (unw_addr_space_t as, unw_word_t ip,
+                                     unw_dyn_info_t *di, unw_proc_info_t *pi,
+                                     int need_unwind_info, void *arg);
+extern void *tdep_uc_addr (unw_tdep_context_t *uc, int reg);
+extern int tdep_get_elf_image (struct elf_image *ei, pid_t pid, unw_word_t ip,
+                               unsigned long *segbase, unsigned long *mapoff,
+                               char *path, size_t pathlen);
+extern void tdep_get_exe_image_path (char *path);
+extern int tdep_access_reg (struct cursor *c, unw_regnum_t reg,
+                            unw_word_t *valp, int write);
+extern int tdep_access_fpreg (struct cursor *c, unw_regnum_t reg,
+                              unw_fpreg_t *valp, int write);
+
+#endif /* SH_LIBUNWIND_I_H */
diff --git a/src/third_party/unwind/dist/include/tdep-tilegx/dwarf-config.h b/src/third_party/unwind/dist/include/tdep-tilegx/dwarf-config.h
new file mode 100644
index 00000000000..93bc6aaecce
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-tilegx/dwarf-config.h
@@ -0,0 +1,50 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2014 Tilera Corp.
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef dwarf_config_h
+#define dwarf_config_h
+
+/* This is FIRST_PSEUDO_REGISTER in GCC, since DWARF_FRAME_REGISTERS is not
+   explicitly defined.  */
+#define DWARF_NUM_PRESERVED_REGS        188
+
+#define DWARF_REGNUM_MAP_LENGTH         (56 + 2)
+
+/* Return TRUE if the ADDR_SPACE uses big-endian byte-order.  */
+#define dwarf_is_big_endian(addr_space) ((addr_space)->big_endian)
+
+/* Convert a pointer to a dwarf_cursor structure to a pointer to
+   unw_cursor_t.  */
+#define dwarf_to_cursor(c)   ((unw_cursor_t *) (c))
+
+typedef struct dwarf_loc
+{
+  unw_word_t val;
+#ifndef UNW_LOCAL_ONLY
+  unw_word_t type;        /* see DWARF_LOC_TYPE_* macros.  */
+#endif
+} dwarf_loc_t;
+
+#endif /* dwarf_config_h */
diff --git a/src/third_party/unwind/dist/include/tdep-tilegx/jmpbuf.h b/src/third_party/unwind/dist/include/tdep-tilegx/jmpbuf.h
new file mode 100644
index 00000000000..3afe9e46cc4
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-tilegx/jmpbuf.h
@@ -0,0 +1,33 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2014 Tilera Corp.
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* Use glibc's jump-buffer indices; NPTL peeks at SP: */
+
+/* FIXME for Tilegx!  */
+
+#define JB_SP            4
+#define JB_RP            5
+#define JB_MASK_SAVED    6
+#define JB_MASK          7
diff --git a/src/third_party/unwind/dist/include/tdep-tilegx/libunwind_i.h b/src/third_party/unwind/dist/include/tdep-tilegx/libunwind_i.h
new file mode 100644
index 00000000000..2cfed456a70
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-tilegx/libunwind_i.h
@@ -0,0 +1,263 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2014 Tilera Corp.
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef TILEGX_LIBUNWIND_I_H
+#define TILEGX_LIBUNWIND_I_H
+
+/* Target-dependent definitions that are internal to libunwind but need
+   to be shared with target-independent code.  */
+
+#include <stdlib.h>
+#include <libunwind.h>
+
+# include "elf64.h"
+#include "mempool.h"
+#include "dwarf.h"
+
+typedef struct
+{
+  /* no Tilegx-specific fast trace */
+} unw_tdep_frame_t;
+
+struct unw_addr_space
+{
+  struct unw_accessors acc;
+
+  int big_endian;
+  tilegx_abi_t abi;
+  unsigned int addr_size;
+
+  unw_caching_policy_t caching_policy;
+#ifdef HAVE_ATOMIC_OPS_H
+  AO_t cache_generation;
+#else
+  uint32_t cache_generation;
+#endif
+  unw_word_t dyn_generation;          /* see dyn-common.h */
+  unw_word_t dyn_info_list_addr;      /* (cached) dyn_info_list_addr */
+  struct dwarf_rs_cache global_cache;
+  struct unw_debug_frame_list *debug_frames;
+};
+
+#define tdep_big_endian(as)            ((as)->big_endian)
+
+struct cursor
+{
+  struct dwarf_cursor dwarf;         /* must be first */
+  unw_word_t sigcontext_addr;
+  unw_word_t sigcontext_sp;
+  unw_word_t sigcontext_pc;
+};
+
+#define DWARF_GET_LOC(l)      ((l).val)
+
+#ifndef UNW_REMOTE_ONLY
+typedef long tilegx_reg_t;
+#endif
+
+#ifdef UNW_LOCAL_ONLY
+#define DWARF_NULL_LOC         DWARF_LOC (0, 0)
+#define DWARF_IS_NULL_LOC(l)   (DWARF_GET_LOC (l) == 0)
+#define DWARF_LOC(r, t)        ((dwarf_loc_t) { .val = (r) })
+#define DWARF_IS_REG_LOC(l)    0
+#define DWARF_REG_LOC(c,r)     (DWARF_LOC((unw_word_t) (intptr_t)       \
+                                          tdep_uc_addr((c)->as_arg, (r)), 0))
+#define DWARF_MEM_LOC(c,m)     DWARF_LOC ((m), 0)
+#define DWARF_FPREG_LOC(c,r)   (DWARF_LOC((unw_word_t) (intptr_t)       \
+                                          tdep_uc_addr((c)->as_arg, (r)), 0))
+
+/* Tilegx has no FP. */
+static inline int
+dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val)
+{
+  Debug (1, "Tielgx has no fp!\n");
+  abort();
+  return 0;
+}
+
+static inline int
+dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
+{
+  Debug (1, "Tielgx has no fp!\n");
+  abort();
+  return 0;
+}
+
+static inline int
+dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val)
+{
+  if (!DWARF_GET_LOC (loc))
+    return -1;
+
+  *val = *(tilegx_reg_t *) (intptr_t) DWARF_GET_LOC (loc);
+  return 0;
+}
+
+static inline int
+dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
+{
+  if (!DWARF_GET_LOC (loc))
+    return -1;
+
+  *(tilegx_reg_t *) (intptr_t) DWARF_GET_LOC (loc) = val;
+  return 0;
+}
+
+#else /* !UNW_LOCAL_ONLY */
+#define DWARF_LOC_TYPE_FP      (1 << 0)
+#define DWARF_LOC_TYPE_REG     (1 << 1)
+#define DWARF_NULL_LOC         DWARF_LOC (0, 0)
+#define DWARF_IS_NULL_LOC(l)                                    \
+  ({ dwarf_loc_t _l = (l); _l.val == 0 && _l.type == 0; })
+#define DWARF_LOC(r, t)        ((dwarf_loc_t) { .val = (r), .type = (t) })
+#define DWARF_IS_REG_LOC(l)    (((l).type & DWARF_LOC_TYPE_REG) != 0)
+#define DWARF_IS_FP_LOC(l)     (((l).type & DWARF_LOC_TYPE_FP) != 0)
+#define DWARF_REG_LOC(c,r)     DWARF_LOC((r), DWARF_LOC_TYPE_REG)
+#define DWARF_MEM_LOC(c,m)     DWARF_LOC ((m), 0)
+#define DWARF_FPREG_LOC(c,r)   DWARF_LOC((r), (DWARF_LOC_TYPE_REG       \
+                                               | DWARF_LOC_TYPE_FP))
+
+/* TILEGX has no fp. */
+static inline int
+dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val)
+{
+  Debug (1, "Tielgx has no fp!\n");
+  abort();
+  return 0;
+}
+
+static inline int
+dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
+{
+  Debug (1, "Tielgx has no fp!\n");
+  abort();
+  return 0;
+}
+
+static inline int
+dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val)
+{
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  /* If a code-generator were to save a value of type unw_word_t in a
+     floating-point register, we would have to support this case.  I
+     suppose it could happen with MMX registers, but does it really
+     happen?  */
+  assert (!DWARF_IS_FP_LOC (loc));
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), val,
+                                     0, c->as_arg);
+
+  return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), val,
+                                   0, c->as_arg);
+}
+
+static inline int
+dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
+{
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  /* If a code-generator were to save a value of type unw_word_t in a
+     floating-point register, we would have to support this case.  I
+     suppose it could happen with MMX registers, but does it really
+     happen?  */
+  assert (!DWARF_IS_FP_LOC (loc));
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), &val,
+                                     1, c->as_arg);
+
+  return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), &val,
+                                   1, c->as_arg);
+}
+
+#endif /* !UNW_LOCAL_ONLY */
+
+#define tdep_getcontext_trace           unw_getcontext
+#define tdep_init_done                  UNW_OBJ(init_done)
+#define tdep_needs_initialization       UNW_OBJ(needs_initialization)
+#define tdep_init                       UNW_OBJ(init)
+/* Platforms that support UNW_INFO_FORMAT_TABLE need to define
+   tdep_search_unwind_table.  */
+#define tdep_search_unwind_table        dwarf_search_unwind_table
+#define tdep_find_unwind_table          dwarf_find_unwind_table
+#define tdep_uc_addr                    UNW_ARCH_OBJ(uc_addr)
+#define tdep_get_elf_image              UNW_ARCH_OBJ(get_elf_image)
+#define tdep_get_exe_image_path         UNW_ARCH_OBJ(get_exe_image_path)
+#define tdep_access_reg                 UNW_OBJ(access_reg)
+#define tdep_access_fpreg               UNW_OBJ(access_fpreg)
+#define tdep_fetch_frame(c,ip,n)        do {} while(0)
+#define tdep_cache_frame(c)             0
+#define tdep_reuse_frame(c,frame)       do {} while(0)
+#define tdep_stash_frame(c,rs)          do {} while(0)
+#define tdep_trace(cur,addr,n)          (-UNW_ENOINFO)
+
+#ifdef UNW_LOCAL_ONLY
+#define tdep_find_proc_info(c,ip,n)                            \
+  dwarf_find_proc_info((c)->as, (ip), &(c)->pi, (n),           \
+                       (c)->as_arg)
+#define tdep_put_unwind_info(as,pi,arg)         \
+  dwarf_put_unwind_info((as), (pi), (arg))
+#else
+#define tdep_find_proc_info(c,ip,n)                                     \
+  (*(c)->as->acc.find_proc_info)((c)->as, (ip), &(c)->pi, (n),          \
+                                 (c)->as_arg)
+#define tdep_put_unwind_info(as,pi,arg)                 \
+  (*(as)->acc.put_unwind_info)((as), (pi), (arg))
+#endif
+
+#define tdep_get_as(c)                  ((c)->dwarf.as)
+#define tdep_get_as_arg(c)              ((c)->dwarf.as_arg)
+#define tdep_get_ip(c)                  ((c)->dwarf.ip)
+
+extern int tdep_init_done;
+
+extern void tdep_init (void);
+extern int tdep_search_unwind_table (unw_addr_space_t as,
+                                     unw_word_t ip,
+                                     unw_dyn_info_t *di,
+                                     unw_proc_info_t *pi,
+                                     int need_unwind_info,
+                                     void *arg);
+extern void *tdep_uc_addr (ucontext_t *uc, int reg);
+extern int tdep_get_elf_image (struct elf_image *ei,
+                               pid_t pid, unw_word_t ip,
+                               unsigned long *segbase,
+                               unsigned long *mapoff,
+                               char *path, size_t pathlen);
+extern void tdep_get_exe_image_path (char *path);
+extern int tdep_access_reg (struct cursor *c,
+                            unw_regnum_t reg,
+                            unw_word_t *valp,
+                            int write);
+extern int tdep_access_fpreg (struct cursor *c,
+                              unw_regnum_t reg,
+                              unw_fpreg_t *valp,
+                              int write);
+
+#endif /* TILEGX_LIBUNWIND_I_H */
diff --git a/src/third_party/unwind/dist/include/tdep-x86/dwarf-config.h b/src/third_party/unwind/dist/include/tdep-x86/dwarf-config.h
new file mode 100644
index 00000000000..f76f9c1c4eb
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-x86/dwarf-config.h
@@ -0,0 +1,52 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef dwarf_config_h
+#define dwarf_config_h
+
+/* This matches the value used by GCC (see
+   gcc/config/i386.h:DWARF_FRAME_REGISTERS), which leaves plenty of
+   room for expansion.  */
+#define DWARF_NUM_PRESERVED_REGS        17
+
+#define DWARF_REGNUM_MAP_LENGTH         19
+
+/* Return TRUE if the ADDR_SPACE uses big-endian byte-order.  */
+#define dwarf_is_big_endian(addr_space) 0
+
+/* Convert a pointer to a dwarf_cursor structure to a pointer to
+   unw_cursor_t.  */
+#define dwarf_to_cursor(c)      ((unw_cursor_t *) (c))
+
+typedef struct dwarf_loc
+  {
+    unw_word_t val;
+#ifndef UNW_LOCAL_ONLY
+    unw_word_t type;            /* see X86_LOC_TYPE_* macros.  */
+#endif
+  }
+dwarf_loc_t;
+
+#endif /* dwarf_config_h */
diff --git a/src/third_party/unwind/dist/include/tdep-x86/jmpbuf.h b/src/third_party/unwind/dist/include/tdep-x86/jmpbuf.h
new file mode 100644
index 00000000000..521dfa6992b
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-x86/jmpbuf.h
@@ -0,0 +1,42 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* Use glibc's jump-buffer indices; NPTL peeks at SP: */
+
+#if defined __linux__
+
+#define JB_SP           4
+#define JB_RP           5
+#define JB_MASK_SAVED   6
+#define JB_MASK         7
+
+#elif defined __FreeBSD__
+
+#define JB_SP           2
+#define JB_RP           0
+#define JB_MASK_SAVED   11
+#define JB_MASK         7
+
+#endif
diff --git a/src/third_party/unwind/dist/include/tdep-x86/libunwind_i.h b/src/third_party/unwind/dist/include/tdep-x86/libunwind_i.h
new file mode 100644
index 00000000000..5231189a499
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-x86/libunwind_i.h
@@ -0,0 +1,293 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002-2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef X86_LIBUNWIND_I_H
+#define X86_LIBUNWIND_I_H
+
+/* Target-dependent definitions that are internal to libunwind but need
+   to be shared with target-independent code.  */
+
+#include <stdlib.h>
+#include <libunwind.h>
+
+#include "elf32.h"
+#include "mempool.h"
+#include "dwarf.h"
+
+typedef struct
+  {
+    /* no x86-specific fast trace */
+  }
+unw_tdep_frame_t;
+
+struct unw_addr_space
+  {
+    struct unw_accessors acc;
+    unw_caching_policy_t caching_policy;
+#ifdef HAVE_ATOMIC_OPS_H
+    AO_t cache_generation;
+#else
+    uint32_t cache_generation;
+#endif
+    unw_word_t dyn_generation;          /* see dyn-common.h */
+    unw_word_t dyn_info_list_addr;      /* (cached) dyn_info_list_addr */
+    struct dwarf_rs_cache global_cache;
+    struct unw_debug_frame_list *debug_frames;
+   };
+
+struct cursor
+  {
+    struct dwarf_cursor dwarf;          /* must be first */
+
+    /* Format of sigcontext structure and address at which it is
+       stored: */
+    enum
+      {
+        X86_SCF_NONE,                   /* no signal frame encountered */
+        X86_SCF_LINUX_SIGFRAME,         /* Linux x86 sigcontext */
+        X86_SCF_LINUX_RT_SIGFRAME,      /* POSIX ucontext_t */
+        X86_SCF_FREEBSD_SIGFRAME,       /* FreeBSD x86 sigcontext */
+        X86_SCF_FREEBSD_SIGFRAME4,      /* FreeBSD 4.x x86 sigcontext */
+        X86_SCF_FREEBSD_OSIGFRAME,      /* FreeBSD pre-4.x x86 sigcontext */
+        X86_SCF_FREEBSD_SYSCALL,        /* FreeBSD x86 syscall */
+      }
+    sigcontext_format;
+    unw_word_t sigcontext_addr;
+    int validate;
+    ucontext_t *uc;
+  };
+
+static inline ucontext_t *
+dwarf_get_uc(const struct dwarf_cursor *cursor)
+{
+  const struct cursor *c = (struct cursor *) cursor->as_arg;
+  return c->uc;
+}
+
+#define DWARF_GET_LOC(l)        ((l).val)
+
+#ifdef UNW_LOCAL_ONLY
+# define DWARF_NULL_LOC         DWARF_LOC (0, 0)
+# define DWARF_IS_NULL_LOC(l)   (DWARF_GET_LOC (l) == 0)
+# define DWARF_LOC(r, t)        ((dwarf_loc_t) { .val = (r) })
+# define DWARF_IS_REG_LOC(l)    0
+# define DWARF_REG_LOC(c,r)     (DWARF_LOC((unw_word_t)                      \
+                                 tdep_uc_addr(dwarf_get_uc(c), (r)), 0))
+# define DWARF_MEM_LOC(c,m)     DWARF_LOC ((m), 0)
+# define DWARF_FPREG_LOC(c,r)   (DWARF_LOC((unw_word_t)                      \
+                                 tdep_uc_addr(dwarf_get_uc(c), (r)), 0))
+
+static inline int
+dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val)
+{
+  if (!DWARF_GET_LOC (loc))
+    return -1;
+  *val = *(unw_fpreg_t *) DWARF_GET_LOC (loc);
+  return 0;
+}
+
+static inline int
+dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
+{
+  if (!DWARF_GET_LOC (loc))
+    return -1;
+  *(unw_fpreg_t *) DWARF_GET_LOC (loc) = val;
+  return 0;
+}
+
+static inline int
+dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val)
+{
+  if (!DWARF_GET_LOC (loc))
+    return -1;
+  return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), val,
+                                   0, c->as_arg);
+}
+
+static inline int
+dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
+{
+  if (!DWARF_GET_LOC (loc))
+    return -1;
+  return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), &val,
+                                   1, c->as_arg);
+}
+
+#else /* !UNW_LOCAL_ONLY */
+# define DWARF_LOC_TYPE_FP      (1 << 0)
+# define DWARF_LOC_TYPE_REG     (1 << 1)
+# define DWARF_NULL_LOC         DWARF_LOC (0, 0)
+# define DWARF_IS_NULL_LOC(l)                                           \
+                ({ dwarf_loc_t _l = (l); _l.val == 0 && _l.type == 0; })
+# define DWARF_LOC(r, t)        ((dwarf_loc_t) { .val = (r), .type = (t) })
+# define DWARF_IS_REG_LOC(l)    (((l).type & DWARF_LOC_TYPE_REG) != 0)
+# define DWARF_IS_FP_LOC(l)     (((l).type & DWARF_LOC_TYPE_FP) != 0)
+# define DWARF_REG_LOC(c,r)     DWARF_LOC((r), DWARF_LOC_TYPE_REG)
+# define DWARF_MEM_LOC(c,m)     DWARF_LOC ((m), 0)
+# define DWARF_FPREG_LOC(c,r)   DWARF_LOC((r), (DWARF_LOC_TYPE_REG      \
+                                                | DWARF_LOC_TYPE_FP))
+
+static inline int
+dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val)
+{
+  char *valp = (char *) &val;
+  unw_word_t addr;
+  int ret;
+
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
+                                       val, 0, c->as_arg);
+
+  addr = DWARF_GET_LOC (loc);
+  if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, (unw_word_t *) valp,
+                                       0, c->as_arg)) < 0)
+    return ret;
+
+  return (*c->as->acc.access_mem) (c->as, addr + 4, (unw_word_t *) valp + 1, 0,
+                                   c->as_arg);
+}
+
+static inline int
+dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
+{
+  char *valp = (char *) &val;
+  unw_word_t addr;
+  int ret;
+
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
+                                       &val, 1, c->as_arg);
+
+  addr = DWARF_GET_LOC (loc);
+  if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, (unw_word_t *) valp,
+                                       1, c->as_arg)) < 0)
+    return ret;
+
+  return (*c->as->acc.access_mem) (c->as, addr + 4, (unw_word_t *) valp + 1,
+                                   1, c->as_arg);
+}
+
+static inline int
+dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val)
+{
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  /* If a code-generator were to save a value of type unw_word_t in a
+     floating-point register, we would have to support this case.  I
+     suppose it could happen with MMX registers, but does it really
+     happen?  */
+  assert (!DWARF_IS_FP_LOC (loc));
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), val,
+                                     0, c->as_arg);
+  else
+    return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), val,
+                                     0, c->as_arg);
+}
+
+static inline int
+dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
+{
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  /* If a code-generator were to save a value of type unw_word_t in a
+     floating-point register, we would have to support this case.  I
+     suppose it could happen with MMX registers, but does it really
+     happen?  */
+  assert (!DWARF_IS_FP_LOC (loc));
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), &val,
+                                     1, c->as_arg);
+  else
+    return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), &val,
+                                     1, c->as_arg);
+}
+
+#endif /* !UNW_LOCAL_ONLY */
+
+#define tdep_getcontext_trace           unw_getcontext
+#define tdep_init_done                  UNW_OBJ(init_done)
+#define tdep_init                       UNW_OBJ(init)
+/* Platforms that support UNW_INFO_FORMAT_TABLE need to define
+   tdep_search_unwind_table.  */
+#define tdep_search_unwind_table        dwarf_search_unwind_table
+#define tdep_find_unwind_table          dwarf_find_unwind_table
+#define tdep_uc_addr                    UNW_ARCH_OBJ(uc_addr)
+#define tdep_get_elf_image              UNW_ARCH_OBJ(get_elf_image)
+#define tdep_get_exe_image_path         UNW_ARCH_OBJ(get_exe_image_path)
+#define tdep_access_reg                 UNW_OBJ(access_reg)
+#define tdep_access_fpreg               UNW_OBJ(access_fpreg)
+#define tdep_fetch_frame(c,ip,n)        do {} while(0)
+#define tdep_cache_frame(c)             0
+#define tdep_reuse_frame(c,frame)       do {} while(0)
+#define tdep_stash_frame(c,rs)          do {} while(0)
+#define tdep_trace(cur,addr,n)          (-UNW_ENOINFO)
+
+#ifdef UNW_LOCAL_ONLY
+# define tdep_find_proc_info(c,ip,n)                            \
+        dwarf_find_proc_info((c)->as, (ip), &(c)->pi, (n),      \
+                                       (c)->as_arg)
+# define tdep_put_unwind_info(as,pi,arg)                \
+        dwarf_put_unwind_info((as), (pi), (arg))
+#else
+# define tdep_find_proc_info(c,ip,n)                                    \
+        (*(c)->as->acc.find_proc_info)((c)->as, (ip), &(c)->pi, (n),    \
+                                       (c)->as_arg)
+# define tdep_put_unwind_info(as,pi,arg)                \
+        (*(as)->acc.put_unwind_info)((as), (pi), (arg))
+#endif
+
+#define tdep_get_as(c)                  ((c)->dwarf.as)
+#define tdep_get_as_arg(c)              ((c)->dwarf.as_arg)
+#define tdep_get_ip(c)                  ((c)->dwarf.ip)
+#define tdep_big_endian(as)             0
+
+extern int tdep_init_done;
+
+extern void tdep_init (void);
+extern int tdep_search_unwind_table (unw_addr_space_t as, unw_word_t ip,
+                                     unw_dyn_info_t *di, unw_proc_info_t *pi,
+                                     int need_unwind_info, void *arg);
+extern void *tdep_uc_addr (ucontext_t *uc, int reg);
+extern int tdep_get_elf_image (struct elf_image *ei, pid_t pid, unw_word_t ip,
+                               unsigned long *segbase, unsigned long *mapoff,
+                               char *path, size_t pathlen);
+extern void tdep_get_exe_image_path (char *path);
+extern int tdep_access_reg (struct cursor *c, unw_regnum_t reg,
+                            unw_word_t *valp, int write);
+extern int tdep_access_fpreg (struct cursor *c, unw_regnum_t reg,
+                              unw_fpreg_t *valp, int write);
+
+#endif /* X86_LIBUNWIND_I_H */
diff --git a/src/third_party/unwind/dist/include/tdep-x86_64/dwarf-config.h b/src/third_party/unwind/dist/include/tdep-x86_64/dwarf-config.h
new file mode 100644
index 00000000000..ff77808e069
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-x86_64/dwarf-config.h
@@ -0,0 +1,57 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2003, 2005 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* copy of include/tdep-x86/dwarf-config.h, modified slightly for x86-64
+   some consolidation is possible here */
+
+#ifndef dwarf_config_h
+#define dwarf_config_h
+
+/* XXX need to verify if this value is correct */
+#ifdef CONFIG_MSABI_SUPPORT
+#define DWARF_NUM_PRESERVED_REGS        33
+#else
+#define DWARF_NUM_PRESERVED_REGS        17
+#endif 
+
+#define DWARF_REGNUM_MAP_LENGTH         DWARF_NUM_PRESERVED_REGS
+
+/* Return TRUE if the ADDR_SPACE uses big-endian byte-order.  */
+#define dwarf_is_big_endian(addr_space) 0
+
+/* Convert a pointer to a dwarf_cursor structure to a pointer to
+   unw_cursor_t.  */
+#define dwarf_to_cursor(c)      ((unw_cursor_t *) (c))
+
+typedef struct dwarf_loc
+  {
+    unw_word_t val;
+    unw_word_t type;            /* see X86_LOC_TYPE_* macros.  */
+  }
+dwarf_loc_t;
+
+#endif /* dwarf_config_h */
diff --git a/src/third_party/unwind/dist/include/tdep-x86_64/jmpbuf.h b/src/third_party/unwind/dist/include/tdep-x86_64/jmpbuf.h
new file mode 100644
index 00000000000..d57196676db
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-x86_64/jmpbuf.h
@@ -0,0 +1,43 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#if defined __linux__
+
+/* Use glibc's jump-buffer indices; NPTL peeks at SP: */
+
+#define JB_SP           6
+#define JB_RP           7
+#define JB_MASK_SAVED   8
+#define JB_MASK         9
+
+#elif defined __FreeBSD__
+
+#define JB_SP           2
+#define JB_RP           0
+/* Pretend the ip cannot be 0 and mask is always saved */
+#define JB_MASK_SAVED   0
+#define JB_MASK         9
+
+#endif
diff --git a/src/third_party/unwind/dist/include/tdep-x86_64/libunwind_i.h b/src/third_party/unwind/dist/include/tdep-x86_64/libunwind_i.h
new file mode 100644
index 00000000000..283525c16a3
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep-x86_64/libunwind_i.h
@@ -0,0 +1,264 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002-2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef X86_64_LIBUNWIND_I_H
+#define X86_64_LIBUNWIND_I_H
+
+/* Target-dependent definitions that are internal to libunwind but need
+   to be shared with target-independent code.  */
+
+#include <stdlib.h>
+#include <libunwind.h>
+
+#include "elf64.h"
+#include "mempool.h"
+#include "dwarf.h"
+
+typedef enum
+  {
+    UNW_X86_64_FRAME_ALIGNED = -3,       /* frame stack pointer aligned */
+    UNW_X86_64_FRAME_STANDARD = -2,     /* regular rbp, rsp +/- offset */
+    UNW_X86_64_FRAME_SIGRETURN = -1,    /* special sigreturn frame */
+    UNW_X86_64_FRAME_OTHER = 0,         /* not cacheable (special or unrecognised) */
+    UNW_X86_64_FRAME_GUESSED = 1        /* guessed it was regular, but not known */
+  }
+unw_tdep_frame_type_t;
+
+typedef struct
+  {
+    uint64_t virtual_address;
+    int64_t frame_type     : 3;  /* unw_tdep_frame_type_t classification */
+    int64_t last_frame     : 1;  /* non-zero if last frame in chain */
+    int64_t cfa_reg_rsp    : 1;  /* cfa dwarf base register is rsp vs. rbp */
+    int64_t cfa_reg_offset : 29; /* cfa is at this offset from base register value */
+    int64_t rbp_cfa_offset : 15; /* rbp saved at this offset from cfa (-1 = not saved) */
+    int64_t rsp_cfa_offset : 15; /* rsp saved at this offset from cfa (-1 = not saved) */
+  }
+unw_tdep_frame_t;
+
+struct unw_addr_space
+  {
+    struct unw_accessors acc;
+    unw_caching_policy_t caching_policy;
+#ifdef HAVE_ATOMIC_OPS_H
+    AO_t cache_generation;
+#else
+    uint32_t cache_generation;
+#endif
+    unw_word_t dyn_generation;          /* see dyn-common.h */
+    unw_word_t dyn_info_list_addr;      /* (cached) dyn_info_list_addr */
+    struct dwarf_rs_cache global_cache;
+    struct unw_debug_frame_list *debug_frames;
+   };
+
+struct cursor
+  {
+    struct dwarf_cursor dwarf;          /* must be first */
+
+    unw_tdep_frame_t frame_info;        /* quick tracing assist info */
+
+    /* Format of sigcontext structure and address at which it is
+       stored: */
+    enum
+      {
+        X86_64_SCF_NONE,                /* no signal frame encountered */
+        X86_64_SCF_LINUX_RT_SIGFRAME,   /* Linux ucontext_t */
+        X86_64_SCF_FREEBSD_SIGFRAME,    /* FreeBSD signal frame */
+        X86_64_SCF_FREEBSD_SYSCALL,     /* FreeBSD syscall */
+      }
+    sigcontext_format;
+    unw_word_t sigcontext_addr;
+    int validate;
+    ucontext_t *uc;
+  };
+
+static inline ucontext_t *
+dwarf_get_uc(const struct dwarf_cursor *cursor)
+{
+  const struct cursor *c = (struct cursor *) cursor->as_arg;
+  return c->uc;
+}
+
+#define DWARF_GET_LOC(l)        ((l).val)
+# define DWARF_LOC_TYPE_MEM     (0 << 0)
+# define DWARF_LOC_TYPE_FP      (1 << 0)
+# define DWARF_LOC_TYPE_REG     (1 << 1)
+# define DWARF_LOC_TYPE_VAL     (1 << 2)
+
+# define DWARF_IS_REG_LOC(l)    (((l).type & DWARF_LOC_TYPE_REG) != 0)
+# define DWARF_IS_FP_LOC(l)     (((l).type & DWARF_LOC_TYPE_FP) != 0)
+# define DWARF_IS_MEM_LOC(l)    ((l).type == DWARF_LOC_TYPE_MEM)
+# define DWARF_IS_VAL_LOC(l)    (((l).type & DWARF_LOC_TYPE_VAL) != 0)
+
+# define DWARF_LOC(r, t)        ((dwarf_loc_t) { .val = (r), .type = (t) })
+# define DWARF_VAL_LOC(c,v)     DWARF_LOC ((v), DWARF_LOC_TYPE_VAL)
+# define DWARF_MEM_LOC(c,m)     DWARF_LOC ((m), DWARF_LOC_TYPE_MEM)
+
+#ifdef UNW_LOCAL_ONLY
+# define DWARF_NULL_LOC         DWARF_LOC (0, 0)
+# define DWARF_IS_NULL_LOC(l)   (DWARF_GET_LOC (l) == 0)
+# define DWARF_REG_LOC(c,r)     (DWARF_LOC((unw_word_t)                      \
+                                 x86_64_r_uc_addr(dwarf_get_uc(c), (r)), 0))
+# define DWARF_FPREG_LOC(c,r)   (DWARF_LOC((unw_word_t)                      \
+                                 x86_64_r_uc_addr(dwarf_get_uc(c), (r)), 0))
+
+#else /* !UNW_LOCAL_ONLY */
+
+# define DWARF_NULL_LOC         DWARF_LOC (0, 0)
+# define DWARF_IS_NULL_LOC(l)                                           \
+                ({ dwarf_loc_t _l = (l); _l.val == 0 && _l.type == 0; })
+# define DWARF_REG_LOC(c,r)     DWARF_LOC((r), DWARF_LOC_TYPE_REG)
+# define DWARF_FPREG_LOC(c,r)   DWARF_LOC((r), (DWARF_LOC_TYPE_REG      \
+                                                | DWARF_LOC_TYPE_FP))
+
+#endif /* !UNW_LOCAL_ONLY */
+
+static inline int
+dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val)
+{
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  abort ();
+}
+
+static inline int
+dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
+{
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  abort ();
+}
+
+static inline int
+dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val)
+{
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), val,
+                                     0, c->as_arg);
+  if (DWARF_IS_MEM_LOC (loc))
+    return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), val,
+                                     0, c->as_arg);
+  assert(DWARF_IS_VAL_LOC (loc));
+  *val = DWARF_GET_LOC (loc);
+  return 0;
+}
+
+static inline int
+dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
+{
+  assert(!DWARF_IS_VAL_LOC (loc));
+
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), &val,
+                                     1, c->as_arg);
+  else
+    return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), &val,
+                                     1, c->as_arg);
+}
+
+#define tdep_getcontext_trace           UNW_ARCH_OBJ(getcontext_trace)
+#define tdep_init_done                  UNW_OBJ(init_done)
+#define tdep_init_mem_validate          UNW_OBJ(init_mem_validate)
+#define tdep_init                       UNW_OBJ(init)
+/* Platforms that support UNW_INFO_FORMAT_TABLE need to define
+   tdep_search_unwind_table.  */
+#define tdep_search_unwind_table        dwarf_search_unwind_table
+#define tdep_find_unwind_table          dwarf_find_unwind_table
+#define tdep_get_elf_image              UNW_ARCH_OBJ(get_elf_image)
+#define tdep_get_exe_image_path         UNW_ARCH_OBJ(get_exe_image_path)
+#define tdep_access_reg                 UNW_OBJ(access_reg)
+#define tdep_access_fpreg               UNW_OBJ(access_fpreg)
+#if __linux__
+# define tdep_fetch_frame               UNW_OBJ(fetch_frame)
+# define tdep_cache_frame               UNW_OBJ(cache_frame)
+# define tdep_reuse_frame               UNW_OBJ(reuse_frame)
+#else
+# define tdep_fetch_frame(c,ip,n)       do {} while(0)
+# define tdep_cache_frame(c)            0
+# define tdep_reuse_frame(c,frame)      do {} while(0)
+#endif
+#define tdep_stash_frame                UNW_OBJ(stash_frame)
+#define tdep_trace                      UNW_OBJ(tdep_trace)
+#define x86_64_r_uc_addr                UNW_OBJ(r_uc_addr)
+
+#ifdef UNW_LOCAL_ONLY
+# define tdep_find_proc_info(c,ip,n)                            \
+        dwarf_find_proc_info((c)->as, (ip), &(c)->pi, (n),      \
+                                       (c)->as_arg)
+# define tdep_put_unwind_info(as,pi,arg)                \
+        dwarf_put_unwind_info((as), (pi), (arg))
+#else
+# define tdep_find_proc_info(c,ip,n)                                    \
+        (*(c)->as->acc.find_proc_info)((c)->as, (ip), &(c)->pi, (n),    \
+                                       (c)->as_arg)
+# define tdep_put_unwind_info(as,pi,arg)                        \
+        (*(as)->acc.put_unwind_info)((as), (pi), (arg))
+#endif
+
+#define tdep_get_as(c)                  ((c)->dwarf.as)
+#define tdep_get_as_arg(c)              ((c)->dwarf.as_arg)
+#define tdep_get_ip(c)                  ((c)->dwarf.ip)
+#define tdep_big_endian(as)             0
+
+extern int tdep_init_done;
+
+extern void tdep_init (void);
+extern void tdep_init_mem_validate (void);
+extern int tdep_search_unwind_table (unw_addr_space_t as, unw_word_t ip,
+                                     unw_dyn_info_t *di, unw_proc_info_t *pi,
+                                     int need_unwind_info, void *arg);
+extern void *x86_64_r_uc_addr (ucontext_t *uc, int reg);
+extern int tdep_get_elf_image (struct elf_image *ei, pid_t pid, unw_word_t ip,
+                               unsigned long *segbase, unsigned long *mapoff,
+                               char *path, size_t pathlen);
+extern void tdep_get_exe_image_path (char *path);
+extern int tdep_access_reg (struct cursor *c, unw_regnum_t reg,
+                            unw_word_t *valp, int write);
+extern int tdep_access_fpreg (struct cursor *c, unw_regnum_t reg,
+                              unw_fpreg_t *valp, int write);
+#if __linux__
+extern void tdep_fetch_frame (struct dwarf_cursor *c, unw_word_t ip,
+                              int need_unwind_info);
+extern int tdep_cache_frame (struct dwarf_cursor *c);
+extern void tdep_reuse_frame (struct dwarf_cursor *c,
+                              int frame);
+extern void tdep_stash_frame (struct dwarf_cursor *c,
+                              struct dwarf_reg_state *rs);
+#endif
+
+extern int tdep_getcontext_trace (unw_tdep_context_t *);
+extern int tdep_trace (unw_cursor_t *cursor, void **addresses, int *n);
+
+#endif /* X86_64_LIBUNWIND_I_H */
diff --git a/src/third_party/unwind/dist/include/tdep/dwarf-config.h b/src/third_party/unwind/dist/include/tdep/dwarf-config.h
new file mode 100644
index 00000000000..c759a46c63b
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep/dwarf-config.h
@@ -0,0 +1,28 @@
+/* Provide a real file - not a symlink - as it would cause multiarch conflicts
+   when multiple different arch releases are installed simultaneously.  */
+
+#if defined __aarch64__
+# include "tdep-aarch64/dwarf-config.h"
+#elif defined __arm__
+# include "tdep-arm/dwarf-config.h"
+#elif defined __hppa__
+# include "tdep-hppa/dwarf-config.h"
+#elif defined __ia64__
+# include "tdep-ia64/dwarf-config.h"
+#elif defined __mips__
+# include "tdep-mips/dwarf-config.h"
+#elif defined __powerpc__ && !defined __powerpc64__
+# include "tdep-ppc32/dwarf-config.h"
+#elif defined __powerpc64__
+# include "tdep-ppc64/dwarf-config.h"
+#elif defined __sh__
+# include "tdep-sh/dwarf-config.h"
+#elif defined __i386__
+# include "tdep-x86/dwarf-config.h"
+#elif defined __x86_64__ || defined __amd64__
+# include "tdep-x86_64/dwarf-config.h"
+#elif defined __tilegx__
+# include "tdep-tilegx/dwarf-config.h"
+#else
+# error "Unsupported arch"
+#endif
diff --git a/src/third_party/unwind/dist/include/tdep/jmpbuf.h b/src/third_party/unwind/dist/include/tdep/jmpbuf.h
new file mode 100644
index 00000000000..13093a0cdc3
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep/jmpbuf.h
@@ -0,0 +1,30 @@
+/* Provide a real file - not a symlink - as it would cause multiarch conflicts
+   when multiple different arch releases are installed simultaneously.  */
+
+#ifndef UNW_REMOTE_ONLY
+
+#if defined __aarch64__
+# include "tdep-aarch64/jmpbuf.h"
+#elif defined __arm__
+# include "tdep-arm/jmpbuf.h"
+#elif defined __hppa__
+# include "tdep-hppa/jmpbuf.h"
+#elif defined __ia64__
+# include "tdep-ia64/jmpbuf.h"
+#elif defined __mips__
+# include "tdep-mips/jmpbuf.h"
+#elif defined __powerpc__ && !defined __powerpc64__
+# include "tdep-ppc32/jmpbuf.h"
+#elif defined __powerpc64__
+# include "tdep-ppc64/jmpbuf.h"
+#elif defined __i386__
+# include "tdep-x86/jmpbuf.h"
+#elif defined __x86_64__
+# include "tdep-x86_64/jmpbuf.h"
+#elif defined __tilegx__
+# include "tdep-tilegx/jmpbuf.h"
+#else
+# error "Unsupported arch"
+#endif
+
+#endif /* !UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/dist/include/tdep/libunwind_i.h b/src/third_party/unwind/dist/include/tdep/libunwind_i.h
new file mode 100644
index 00000000000..19cdc156c6f
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep/libunwind_i.h
@@ -0,0 +1,39 @@
+/* Provide a real file - not a symlink - as it would cause multiarch conflicts
+   when multiple different arch releases are installed simultaneously.  */
+
+#ifndef UNW_REMOTE_ONLY
+
+#if defined __aarch64__
+# include "tdep-aarch64/libunwind_i.h"
+#elif defined __arm__
+# include "tdep-arm/libunwind_i.h"
+#elif defined __hppa__
+# include "tdep-hppa/libunwind_i.h"
+#elif defined __ia64__
+# include "tdep-ia64/libunwind_i.h"
+#elif defined __mips__
+# include "tdep-mips/libunwind_i.h"
+#elif defined __powerpc__ && !defined __powerpc64__
+# include "tdep-ppc32/libunwind_i.h"
+#elif defined __powerpc64__
+# include "tdep-ppc64/libunwind_i.h"
+#elif defined __sh__
+# include "tdep-sh/libunwind_i.h"
+#elif defined __i386__
+# include "tdep-x86/libunwind_i.h"
+#elif defined __x86_64__
+# include "tdep-x86_64/libunwind_i.h"
+#elif defined __tilegx__
+# include "tdep-tilegx/libunwind_i.h"
+#elif defined __s390x__
+# include "tdep-s390x/libunwind_i.h"
+#else
+# error "Unsupported arch"
+#endif
+
+
+#else /* UNW_REMOTE_ONLY */
+
+# include "tdep-x86_64/libunwind_i.h"
+
+#endif /* UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/dist/include/tdep/libunwind_i.h.in b/src/third_party/unwind/dist/include/tdep/libunwind_i.h.in
new file mode 100644
index 00000000000..c47299640e8
--- /dev/null
+++ b/src/third_party/unwind/dist/include/tdep/libunwind_i.h.in
@@ -0,0 +1,39 @@
+/* Provide a real file - not a symlink - as it would cause multiarch conflicts
+   when multiple different arch releases are installed simultaneously.  */
+
+#ifndef UNW_REMOTE_ONLY
+
+#if defined __aarch64__
+# include "tdep-aarch64/libunwind_i.h"
+#elif defined __arm__
+# include "tdep-arm/libunwind_i.h"
+#elif defined __hppa__
+# include "tdep-hppa/libunwind_i.h"
+#elif defined __ia64__
+# include "tdep-ia64/libunwind_i.h"
+#elif defined __mips__
+# include "tdep-mips/libunwind_i.h"
+#elif defined __powerpc__ && !defined __powerpc64__
+# include "tdep-ppc32/libunwind_i.h"
+#elif defined __powerpc64__
+# include "tdep-ppc64/libunwind_i.h"
+#elif defined __sh__
+# include "tdep-sh/libunwind_i.h"
+#elif defined __i386__
+# include "tdep-x86/libunwind_i.h"
+#elif defined __x86_64__
+# include "tdep-x86_64/libunwind_i.h"
+#elif defined __tilegx__
+# include "tdep-tilegx/libunwind_i.h"
+#elif defined __s390x__
+# include "tdep-s390x/libunwind_i.h"
+#else
+# error "Unsupported arch"
+#endif
+
+
+#else /* UNW_REMOTE_ONLY */
+
+# include "tdep-@arch@/libunwind_i.h"
+
+#endif /* UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/dist/include/unwind.h b/src/third_party/unwind/dist/include/unwind.h
new file mode 100644
index 00000000000..7cf128deca3
--- /dev/null
+++ b/src/third_party/unwind/dist/include/unwind.h
@@ -0,0 +1,154 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef _UNWIND_H
+#define _UNWIND_H
+
+/* For uint64_t */
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Minimal interface as per C++ ABI draft standard:
+
+        http://www.codesourcery.com/cxx-abi/abi-eh.html */
+
+typedef enum
+  {
+    _URC_NO_REASON = 0,
+    _URC_FOREIGN_EXCEPTION_CAUGHT = 1,
+    _URC_FATAL_PHASE2_ERROR = 2,
+    _URC_FATAL_PHASE1_ERROR = 3,
+    _URC_NORMAL_STOP = 4,
+    _URC_END_OF_STACK = 5,
+    _URC_HANDLER_FOUND = 6,
+    _URC_INSTALL_CONTEXT = 7,
+    _URC_CONTINUE_UNWIND = 8
+  }
+_Unwind_Reason_Code;
+
+typedef int _Unwind_Action;
+
+#define _UA_SEARCH_PHASE        1
+#define _UA_CLEANUP_PHASE       2
+#define _UA_HANDLER_FRAME       4
+#define _UA_FORCE_UNWIND        8
+
+struct _Unwind_Context;         /* opaque data-structure */
+struct _Unwind_Exception;       /* forward-declaration */
+
+typedef void (*_Unwind_Exception_Cleanup_Fn) (_Unwind_Reason_Code,
+                                              struct _Unwind_Exception *);
+
+typedef _Unwind_Reason_Code (*_Unwind_Stop_Fn) (int, _Unwind_Action,
+                                                uint64_t,
+                                                struct _Unwind_Exception *,
+                                                struct _Unwind_Context *,
+                                                void *);
+
+/* The C++ ABI requires exception_class, private_1, and private_2 to
+   be of type uint64 and the entire structure to be
+   double-word-aligned. Please note that exception_class stays 64-bit 
+   even on 32-bit machines for gcc compatibility.  */
+struct _Unwind_Exception
+  {
+    uint64_t exception_class;
+    _Unwind_Exception_Cleanup_Fn exception_cleanup;
+    unsigned long private_1;
+    unsigned long private_2;
+  } __attribute__((__aligned__));
+
+extern _Unwind_Reason_Code _Unwind_RaiseException (struct _Unwind_Exception *);
+extern _Unwind_Reason_Code _Unwind_ForcedUnwind (struct _Unwind_Exception *,
+                                                 _Unwind_Stop_Fn, void *);
+extern void _Unwind_Resume (struct _Unwind_Exception *);
+extern void _Unwind_DeleteException (struct _Unwind_Exception *);
+extern unsigned long _Unwind_GetGR (struct _Unwind_Context *, int);
+extern void _Unwind_SetGR (struct _Unwind_Context *, int, unsigned long);
+extern unsigned long _Unwind_GetIP (struct _Unwind_Context *);
+extern unsigned long _Unwind_GetIPInfo (struct _Unwind_Context *, int *);
+extern void _Unwind_SetIP (struct _Unwind_Context *, unsigned long);
+extern unsigned long _Unwind_GetLanguageSpecificData (struct _Unwind_Context*);
+extern unsigned long _Unwind_GetRegionStart (struct _Unwind_Context *);
+
+#ifdef _GNU_SOURCE
+
+/* Callback for _Unwind_Backtrace().  The backtrace stops immediately
+   if the callback returns any value other than _URC_NO_REASON. */
+typedef _Unwind_Reason_Code (*_Unwind_Trace_Fn) (struct _Unwind_Context *,
+                                                 void *);
+
+/* See http://gcc.gnu.org/ml/gcc-patches/2001-09/msg00082.html for why
+   _UA_END_OF_STACK exists.  */
+# define _UA_END_OF_STACK       16
+
+/* If the unwind was initiated due to a forced unwind, resume that
+   operation, else re-raise the exception.  This is used by
+   __cxa_rethrow().  */
+extern _Unwind_Reason_Code
+          _Unwind_Resume_or_Rethrow (struct _Unwind_Exception *);
+
+/* See http://gcc.gnu.org/ml/gcc-patches/2003-09/msg00154.html for why
+   _Unwind_GetBSP() exists.  */
+extern unsigned long _Unwind_GetBSP (struct _Unwind_Context *);
+
+/* Return the "canonical frame address" for the given context.
+   This is used by NPTL... */
+extern unsigned long _Unwind_GetCFA (struct _Unwind_Context *);
+
+/* Return the base-address for data references.  */
+extern unsigned long _Unwind_GetDataRelBase (struct _Unwind_Context *);
+
+/* Return the base-address for text references.  */
+extern unsigned long _Unwind_GetTextRelBase (struct _Unwind_Context *);
+
+/* Call _Unwind_Trace_Fn once for each stack-frame, without doing any
+   cleanup.  The first frame for which the callback is invoked is the
+   one for the caller of _Unwind_Backtrace().  _Unwind_Backtrace()
+   returns _URC_END_OF_STACK when the backtrace stopped due to
+   reaching the end of the call-chain or _URC_FATAL_PHASE1_ERROR if it
+   stops for any other reason.  */
+extern _Unwind_Reason_Code _Unwind_Backtrace (_Unwind_Trace_Fn, void *);
+
+/* Find the start-address of the procedure containing the specified IP
+   or NULL if it cannot be found (e.g., because the function has no
+   unwind info).  Note: there is not necessarily a one-to-one
+   correspondence between source-level functions and procedures: some
+   functions don't have unwind-info and others are split into multiple
+   procedures.  */
+extern void *_Unwind_FindEnclosingFunction (void *);
+
+/* See also Linux Standard Base Spec:
+    http://www.linuxbase.org/spec/refspecs/LSB_1.3.0/gLSB/gLSB/libgcc-s.html */
+
+#endif /* _GNU_SOURCE */
+
+#ifdef __cplusplus
+};
+#endif
+
+#endif /* _UNWIND_H */
diff --git a/src/third_party/unwind/dist/src/Makefile.am b/src/third_party/unwind/dist/src/Makefile.am
new file mode 100644
index 00000000000..8d72ef0b5b6
--- /dev/null
+++ b/src/third_party/unwind/dist/src/Makefile.am
@@ -0,0 +1,786 @@
+SOVERSION=8:1:0		# See comments at end of file.
+SETJMP_SO_VERSION=0:0:0
+COREDUMP_SO_VERSION=0:0:0
+#
+# Don't link with start-files since we don't use any constructors/destructors:
+#
+COMMON_SO_LDFLAGS = $(LDFLAGS_NOSTARTFILES)
+
+lib_LIBRARIES =
+lib_LTLIBRARIES =
+if !REMOTE_ONLY
+lib_LTLIBRARIES += libunwind.la
+if BUILD_PTRACE
+lib_LTLIBRARIES += libunwind-ptrace.la
+endif
+if BUILD_COREDUMP
+lib_LTLIBRARIES += libunwind-coredump.la
+endif
+endif
+
+noinst_HEADERS =
+noinst_LTLIBRARIES =
+
+pkgconfigdir = $(libdir)/pkgconfig
+pkgconfig_DATA = libunwind-generic.pc
+
+if !REMOTE_ONLY
+pkgconfig_DATA += unwind/libunwind.pc
+endif
+
+if BUILD_PTRACE
+pkgconfig_DATA += ptrace/libunwind-ptrace.pc
+endif
+
+if BUILD_SETJMP
+pkgconfig_DATA += setjmp/libunwind-setjmp.pc
+endif
+
+if BUILD_COREDUMP
+pkgconfig_DATA += coredump/libunwind-coredump.pc
+endif
+
+### libunwind-ptrace:
+libunwind_ptrace_la_SOURCES =						  \
+	ptrace/_UPT_elf.c						  \
+	ptrace/_UPT_accessors.c ptrace/_UPT_access_fpreg.c		  \
+	ptrace/_UPT_access_mem.c ptrace/_UPT_access_reg.c		  \
+	ptrace/_UPT_create.c ptrace/_UPT_destroy.c			  \
+	ptrace/_UPT_find_proc_info.c ptrace/_UPT_get_dyn_info_list_addr.c \
+	ptrace/_UPT_put_unwind_info.c ptrace/_UPT_get_proc_name.c	  \
+	ptrace/_UPT_reg_offset.c ptrace/_UPT_resume.c
+noinst_HEADERS += ptrace/_UPT_internal.h
+
+### libunwind-coredump:
+libunwind_coredump_la_SOURCES = \
+	coredump/_UCD_accessors.c \
+	coredump/_UCD_create.c \
+	coredump/_UCD_destroy.c \
+	coredump/_UCD_access_mem.c \
+	coredump/_UCD_elf_map_image.c \
+	coredump/_UCD_find_proc_info.c \
+	coredump/_UCD_get_proc_name.c \
+	\
+	coredump/_UPT_elf.c \
+	coredump/_UPT_access_fpreg.c \
+	coredump/_UPT_get_dyn_info_list_addr.c \
+	coredump/_UPT_put_unwind_info.c \
+	coredump/_UPT_resume.c
+libunwind_coredump_la_LDFLAGS = $(COMMON_SO_LDFLAGS) \
+				-version-info $(COREDUMP_SO_VERSION)
+libunwind_coredump_la_LIBADD = $(LIBLZMA)
+noinst_HEADERS += coredump/_UCD_internal.h coredump/_UCD_lib.h
+
+### libunwind-setjmp:
+libunwind_setjmp_la_LDFLAGS		= $(COMMON_SO_LDFLAGS)		     \
+					  -version-info $(SETJMP_SO_VERSION)
+
+if USE_ELF32
+LIBUNWIND_ELF = libunwind-elf32.la
+endif
+if USE_ELF64
+LIBUNWIND_ELF = libunwind-elf64.la
+endif
+if USE_ELFXX
+LIBUNWIND_ELF = libunwind-elfxx.la
+endif
+
+libunwind_setjmp_la_LIBADD		= $(LIBUNWIND_ELF)	\
+					  libunwind-$(arch).la	\
+					  libunwind.la -lc
+libunwind_setjmp_la_SOURCES		= setjmp/longjmp.c	\
+					  setjmp/siglongjmp.c
+noinst_HEADERS				+= setjmp/setjmp_i.h
+
+### libunwind:
+libunwind_la_LIBADD =
+
+# List of arch-independent files needed by both local-only and generic
+# libraries:
+libunwind_la_SOURCES_common =					\
+	$(libunwind_la_SOURCES_os)				\
+	mi/init.c mi/flush_cache.c mi/mempool.c mi/strerror.c
+
+# List of arch-independent files needed by generic library (libunwind-$ARCH):
+libunwind_la_SOURCES_generic =						\
+	mi/Gdyn-extract.c mi/Gdyn-remote.c mi/Gfind_dynamic_proc_info.c	\
+	mi/Gget_accessors.c						\
+	mi/Gget_proc_info_by_ip.c mi/Gget_proc_name.c			\
+	mi/Gput_dynamic_unwind_info.c mi/Gdestroy_addr_space.c		\
+	mi/Gget_reg.c mi/Gset_reg.c					\
+	mi/Gget_fpreg.c mi/Gset_fpreg.c					\
+	mi/Gset_caching_policy.c					\
+	mi/Gset_cache_size.c
+
+if SUPPORT_CXX_EXCEPTIONS
+libunwind_la_SOURCES_local_unwind =					\
+	unwind/Backtrace.c unwind/DeleteException.c			\
+	unwind/FindEnclosingFunction.c unwind/ForcedUnwind.c		\
+	unwind/GetBSP.c unwind/GetCFA.c unwind/GetDataRelBase.c		\
+	unwind/GetGR.c unwind/GetIP.c unwind/GetLanguageSpecificData.c	\
+	unwind/GetRegionStart.c unwind/GetTextRelBase.c			\
+	unwind/RaiseException.c unwind/Resume.c				\
+	unwind/Resume_or_Rethrow.c unwind/SetGR.c unwind/SetIP.c	\
+	unwind/GetIPInfo.c
+
+#  _ReadULEB()/_ReadSLEB() are needed for Intel C++ 8.0 compatibility
+libunwind_la_SOURCES_os_linux_local = mi/_ReadULEB.c mi/_ReadSLEB.c
+endif
+
+# List of arch-independent files needed by local-only library (libunwind):
+libunwind_la_SOURCES_local_nounwind =					\
+	$(libunwind_la_SOURCES_os_local)				\
+	mi/backtrace.c							\
+	mi/dyn-cancel.c mi/dyn-info-list.c mi/dyn-register.c		\
+	mi/Ldyn-extract.c mi/Lfind_dynamic_proc_info.c			\
+	mi/Lget_accessors.c						\
+	mi/Lget_proc_info_by_ip.c mi/Lget_proc_name.c			\
+	mi/Lput_dynamic_unwind_info.c mi/Ldestroy_addr_space.c		\
+	mi/Lget_reg.c   mi/Lset_reg.c					\
+	mi/Lget_fpreg.c mi/Lset_fpreg.c					\
+	mi/Lset_caching_policy.c					\
+	mi/Lset_cache_size.c
+
+libunwind_la_SOURCES_local =						\
+	$(libunwind_la_SOURCES_local_nounwind)				\
+	$(libunwind_la_SOURCES_local_unwind)
+
+noinst_HEADERS += os-linux.h
+libunwind_la_SOURCES_os_linux = os-linux.c
+
+libunwind_la_SOURCES_os_hpux = os-hpux.c
+
+libunwind_la_SOURCES_os_freebsd = os-freebsd.c
+
+libunwind_la_SOURCES_os_qnx = os-qnx.c
+
+libunwind_dwarf_common_la_SOURCES = dwarf/global.c
+
+libunwind_dwarf_local_la_SOURCES = \
+	dwarf/Lexpr.c dwarf/Lfde.c dwarf/Lparser.c dwarf/Lpe.c \
+	dwarf/Lfind_proc_info-lsb.c \
+	dwarf/Lfind_unwind_table.c
+libunwind_dwarf_local_la_LIBADD = libunwind-dwarf-common.la
+
+libunwind_dwarf_generic_la_SOURCES = \
+	dwarf/Gexpr.c dwarf/Gfde.c dwarf/Gparser.c dwarf/Gpe.c \
+	dwarf/Gfind_proc_info-lsb.c \
+	dwarf/Gfind_unwind_table.c
+libunwind_dwarf_generic_la_LIBADD = libunwind-dwarf-common.la
+
+if USE_DWARF
+ noinst_LTLIBRARIES += libunwind-dwarf-common.la libunwind-dwarf-generic.la
+if !REMOTE_ONLY
+ noinst_LTLIBRARIES += libunwind-dwarf-local.la
+endif
+ libunwind_la_LIBADD += libunwind-dwarf-local.la
+endif
+
+noinst_HEADERS += elf32.h elf64.h elfxx.h
+
+libunwind_elf32_la_SOURCES = elf32.c
+libunwind_elf64_la_SOURCES = elf64.c
+libunwind_elfxx_la_SOURCES = elfxx.c
+libunwind_elf32_la_LIBADD  = $(LIBLZMA)
+libunwind_elf64_la_LIBADD  = $(LIBLZMA)
+libunwind_elfxx_la_LIBADD  = $(LIBLZMA)
+
+noinst_LTLIBRARIES += $(LIBUNWIND_ELF)
+libunwind_la_LIBADD += $(LIBUNWIND_ELF)
+
+# The list of files that go into libunwind and libunwind-aarch64:
+noinst_HEADERS += aarch64/init.h aarch64/offsets.h aarch64/unwind_i.h
+libunwind_la_SOURCES_aarch64_common = $(libunwind_la_SOURCES_common)	    \
+	aarch64/is_fpreg.c aarch64/regname.c
+
+# The list of files that go into libunwind:
+libunwind_la_SOURCES_aarch64 = $(libunwind_la_SOURCES_aarch64_common)	    \
+	$(libunwind_la_SOURCES_local)					    \
+	aarch64/Lapply_reg_state.c aarch64/Lreg_states_iterate.c	    \
+	aarch64/Lcreate_addr_space.c aarch64/Lget_proc_info.c 		    \
+	aarch64/Lget_save_loc.c aarch64/Lglobal.c aarch64/Linit.c	    \
+	aarch64/Linit_local.c aarch64/Linit_remote.c 			    \
+	aarch64/Lis_signal_frame.c aarch64/Lregs.c aarch64/Lresume.c 	    \
+	aarch64/Lstash_frame.c aarch64/Lstep.c aarch64/Ltrace.c		    \
+	aarch64/getcontext.S
+
+libunwind_aarch64_la_SOURCES_aarch64 = $(libunwind_la_SOURCES_aarch64_common) \
+	$(libunwind_la_SOURCES_generic)					      \
+	aarch64/Gapply_reg_state.c aarch64/Greg_states_iterate.c	      \
+	aarch64/Gcreate_addr_space.c aarch64/Gget_proc_info.c 		      \
+	aarch64/Gget_save_loc.c aarch64/Gglobal.c aarch64/Ginit.c 	      \
+	aarch64/Ginit_local.c aarch64/Ginit_remote.c			      \
+	aarch64/Gis_signal_frame.c aarch64/Gregs.c aarch64/Gresume.c	      \
+	aarch64/Gstash_frame.c aarch64/Gstep.c aarch64/Gtrace.c
+
+# The list of files that go into libunwind and libunwind-arm:
+noinst_HEADERS += arm/init.h arm/offsets.h arm/unwind_i.h
+libunwind_la_SOURCES_arm_common = $(libunwind_la_SOURCES_common)	    \
+	arm/is_fpreg.c arm/regname.c
+
+# The list of files that go into libunwind:
+libunwind_la_SOURCES_arm = $(libunwind_la_SOURCES_arm_common)		    \
+	$(libunwind_la_SOURCES_arm_os_local)				    \
+	$(libunwind_la_SOURCES_local)					    \
+	arm/getcontext.S						    \
+	arm/Lapply_reg_state.c arm/Lreg_states_iterate.c		    \
+	arm/Lcreate_addr_space.c arm/Lget_proc_info.c arm/Lget_save_loc.c   \
+	arm/Lglobal.c arm/Linit.c arm/Linit_local.c arm/Linit_remote.c	    \
+	arm/Lregs.c arm/Lresume.c arm/Lstep.c				    \
+	arm/Lex_tables.c arm/Lstash_frame.c arm/Ltrace.c
+
+# The list of files that go into libunwind-arm:
+libunwind_arm_la_SOURCES_arm = $(libunwind_la_SOURCES_arm_common)	    \
+	$(libunwind_la_SOURCES_arm_os)					    \
+	$(libunwind_la_SOURCES_generic)					    \
+	arm/Gapply_reg_state.c arm/Greg_states_iterate.c		    \
+	arm/Gcreate_addr_space.c arm/Gget_proc_info.c arm/Gget_save_loc.c   \
+	arm/Gglobal.c arm/Ginit.c arm/Ginit_local.c arm/Ginit_remote.c	    \
+	arm/Gregs.c arm/Gresume.c arm/Gstep.c				    \
+	arm/Gex_tables.c arm/Gstash_frame.c arm/Gtrace.c
+
+# The list of files that go both into libunwind and libunwind-ia64:
+noinst_HEADERS += ia64/init.h ia64/offsets.h ia64/regs.h		    \
+	ia64/ucontext_i.h ia64/unwind_decoder.h ia64/unwind_i.h
+libunwind_la_SOURCES_ia64_common = $(libunwind_la_SOURCES_common)	    \
+	ia64/regname.c
+
+# The list of files that go into libunwind:
+libunwind_la_SOURCES_ia64 = $(libunwind_la_SOURCES_ia64_common)		     \
+	$(libunwind_la_SOURCES_local)					     \
+									     \
+	ia64/dyn_info_list.S ia64/getcontext.S				     \
+									     \
+	ia64/Lapply_reg_state.c ia64/Lreg_states_iterate.c		     \
+	ia64/Lcreate_addr_space.c ia64/Lget_proc_info.c ia64/Lget_save_loc.c \
+	ia64/Lglobal.c ia64/Linit.c ia64/Linit_local.c ia64/Linit_remote.c   \
+	ia64/Linstall_cursor.S ia64/Lis_signal_frame.c ia64/Lparser.c	     \
+	ia64/Lrbs.c ia64/Lregs.c ia64/Lresume.c ia64/Lscript.c ia64/Lstep.c  \
+	ia64/Ltables.c ia64/Lfind_unwind_table.c
+
+# The list of files that go into libunwind-ia64:
+libunwind_ia64_la_SOURCES_ia64 = $(libunwind_la_SOURCES_ia64_common)	     \
+	$(libunwind_la_SOURCES_generic)					     \
+	ia64/Gapply_reg_state.c ia64/Greg_states_iterate.c		     \
+	ia64/Gcreate_addr_space.c ia64/Gget_proc_info.c ia64/Gget_save_loc.c \
+	ia64/Gglobal.c ia64/Ginit.c ia64/Ginit_local.c ia64/Ginit_remote.c   \
+	ia64/Ginstall_cursor.S ia64/Gis_signal_frame.c ia64/Gparser.c	     \
+	ia64/Grbs.c ia64/Gregs.c ia64/Gresume.c ia64/Gscript.c ia64/Gstep.c  \
+	ia64/Gtables.c ia64/Gfind_unwind_table.c
+
+# The list of files that go both into libunwind and libunwind-hppa:
+noinst_HEADERS += hppa/init.h hppa/offsets.h hppa/unwind_i.h
+libunwind_la_SOURCES_hppa_common = $(libunwind_la_SOURCES_common)	\
+	hppa/regname.c
+
+# The list of files that go into libunwind:
+libunwind_la_SOURCES_hppa = $(libunwind_la_SOURCES_hppa_common)		\
+	$(libunwind_la_SOURCES_local)					\
+	hppa/getcontext.S hppa/setcontext.S				\
+	hppa/Lapply_reg_state.c hppa/Lreg_states_iterate.c		\
+	hppa/Lcreate_addr_space.c hppa/Lget_save_loc.c hppa/Lglobal.c	\
+	hppa/Linit.c hppa/Linit_local.c hppa/Linit_remote.c		\
+	hppa/Lis_signal_frame.c hppa/Lget_proc_info.c hppa/Lregs.c	\
+	hppa/Lresume.c hppa/Lstep.c
+
+# The list of files that go into libunwind-hppa:
+libunwind_hppa_la_SOURCES_hppa = $(libunwind_la_SOURCES_hppa_common)	\
+	$(libunwind_la_SOURCES_generic)					\
+	hppa/Gapply_reg_state.c hppa/Greg_states_iterate.c		\
+	hppa/Gcreate_addr_space.c hppa/Gget_save_loc.c hppa/Gglobal.c	\
+	hppa/Ginit.c hppa/Ginit_local.c hppa/Ginit_remote.c		\
+	hppa/Gis_signal_frame.c hppa/Gget_proc_info.c hppa/Gregs.c	\
+	hppa/Gresume.c hppa/Gstep.c
+
+# The list of files that go info libunwind and libunwind-mips:
+noinst_HEADERS += mips/init.h mips/offsets.h mips/unwind_i.h
+libunwind_la_SOURCES_mips_common = $(libunwind_la_SOURCES_common)	    \
+	mips/is_fpreg.c mips/regname.c
+
+# The list of files that go into libunwind:
+libunwind_la_SOURCES_mips = $(libunwind_la_SOURCES_mips_common)		    \
+	$(libunwind_la_SOURCES_local)					    \
+	mips/getcontext.S						    \
+	mips/Lapply_reg_state.c mips/Lreg_states_iterate.c		    \
+	mips/Lcreate_addr_space.c mips/Lget_proc_info.c mips/Lget_save_loc.c   \
+	mips/Lglobal.c mips/Linit.c mips/Linit_local.c mips/Linit_remote.c  \
+	mips/Lis_signal_frame.c mips/Lregs.c mips/Lresume.c mips/Lstep.c
+
+libunwind_mips_la_SOURCES_mips = $(libunwind_la_SOURCES_mips_common)	    \
+	$(libunwind_la_SOURCES_generic)					    \
+	mips/Gapply_reg_state.c mips/Greg_states_iterate.c		    \
+	mips/Gcreate_addr_space.c mips/Gget_proc_info.c mips/Gget_save_loc.c   \
+	mips/Gglobal.c mips/Ginit.c mips/Ginit_local.c mips/Ginit_remote.c	    \
+	mips/Gis_signal_frame.c mips/Gregs.c mips/Gresume.c mips/Gstep.c
+
+# The list of files that go info libunwind and libunwind-tilegx:
+noinst_HEADERS += tilegx/init.h tilegx/offsets.h tilegx/unwind_i.h
+libunwind_la_SOURCES_tilegx_common = $(libunwind_la_SOURCES_common)	    \
+	tilegx/is_fpreg.c tilegx/regname.c
+
+# The list of files that go into libunwind:
+libunwind_la_SOURCES_tilegx = $(libunwind_la_SOURCES_tilegx_common)		    \
+	$(libunwind_la_SOURCES_local)					    \
+	tilegx/getcontext.S						\
+	tilegx/Lapply_reg_state.c tilegx/Lreg_states_iterate.c		    \
+	tilegx/Lcreate_addr_space.c tilegx/Lget_proc_info.c tilegx/Lget_save_loc.c   \
+	tilegx/Lglobal.c tilegx/Linit.c tilegx/Linit_local.c tilegx/Linit_remote.c  \
+	tilegx/Lis_signal_frame.c tilegx/Lregs.c tilegx/Lresume.c tilegx/Lstep.c
+
+libunwind_tilegx_la_SOURCES_tilegx = $(libunwind_la_SOURCES_tilegx_common)	    \
+	$(libunwind_la_SOURCES_generic)					    \
+	tilegx/Gapply_reg_state.c tilegx/Greg_states_iterate.c			     \
+	tilegx/Gcreate_addr_space.c tilegx/Gget_proc_info.c tilegx/Gget_save_loc.c   \
+	tilegx/Gglobal.c tilegx/Ginit.c tilegx/Ginit_local.c tilegx/Ginit_remote.c	    \
+	tilegx/Gis_signal_frame.c tilegx/Gregs.c tilegx/Gresume.c tilegx/Gstep.c
+
+
+# The list of files that go both into libunwind and libunwind-x86:
+noinst_HEADERS += x86/init.h x86/offsets.h x86/unwind_i.h
+libunwind_la_SOURCES_x86_common = $(libunwind_la_SOURCES_common)	\
+	x86/is_fpreg.c x86/regname.c
+
+# The list of files that go into libunwind:
+libunwind_la_SOURCES_x86 = $(libunwind_la_SOURCES_x86_common)		\
+        $(libunwind_la_SOURCES_x86_os_local)				\
+	$(libunwind_la_SOURCES_local)					\
+	x86/Lapply_reg_state.c x86/Lreg_states_iterate.c		\
+	x86/Lcreate_addr_space.c x86/Lget_save_loc.c x86/Lglobal.c	\
+	x86/Linit.c x86/Linit_local.c x86/Linit_remote.c		\
+	x86/Lget_proc_info.c x86/Lregs.c				\
+	x86/Lresume.c x86/Lstep.c
+
+# The list of files that go into libunwind-x86:
+libunwind_x86_la_SOURCES_x86 = $(libunwind_la_SOURCES_x86_common)	\
+        $(libunwind_la_SOURCES_x86_os)					\
+	$(libunwind_la_SOURCES_generic)					\
+	x86/Gapply_reg_state.c x86/Greg_states_iterate.c		\
+	x86/Gcreate_addr_space.c x86/Gget_save_loc.c x86/Gglobal.c	\
+	x86/Ginit.c x86/Ginit_local.c x86/Ginit_remote.c		\
+	x86/Gget_proc_info.c x86/Gregs.c				\
+	x86/Gresume.c x86/Gstep.c
+
+# The list of files that go both into libunwind and libunwind-x86_64:
+noinst_HEADERS += x86_64/offsets.h					\
+	x86_64/init.h x86_64/unwind_i.h x86_64/ucontext_i.h
+libunwind_la_SOURCES_x86_64_common = $(libunwind_la_SOURCES_common)	\
+	x86_64/is_fpreg.c x86_64/regname.c
+
+# The list of files that go into libunwind:
+libunwind_la_SOURCES_x86_64 = $(libunwind_la_SOURCES_x86_64_common)	    \
+        $(libunwind_la_SOURCES_x86_64_os_local)			    	    \
+	$(libunwind_la_SOURCES_local)					    \
+	x86_64/setcontext.S						    \
+	x86_64/Lapply_reg_state.c x86_64/Lreg_states_iterate.c		    \
+	x86_64/Lcreate_addr_space.c x86_64/Lget_save_loc.c x86_64/Lglobal.c \
+	x86_64/Linit.c x86_64/Linit_local.c x86_64/Linit_remote.c	    \
+	x86_64/Lget_proc_info.c x86_64/Lregs.c x86_64/Lresume.c		    \
+	x86_64/Lstash_frame.c x86_64/Lstep.c x86_64/Ltrace.c x86_64/getcontext.S
+
+# The list of files that go into libunwind-x86_64:
+libunwind_x86_64_la_SOURCES_x86_64 = $(libunwind_la_SOURCES_x86_64_common)  \
+        $(libunwind_la_SOURCES_x86_64_os)			    	    \
+	$(libunwind_la_SOURCES_generic)					    \
+	x86_64/Gapply_reg_state.c x86_64/Greg_states_iterate.c		    \
+	x86_64/Gcreate_addr_space.c x86_64/Gget_save_loc.c x86_64/Gglobal.c \
+	x86_64/Ginit.c x86_64/Ginit_local.c x86_64/Ginit_remote.c	    \
+	x86_64/Gget_proc_info.c x86_64/Gregs.c x86_64/Gresume.c		    \
+	x86_64/Gstash_frame.c x86_64/Gstep.c x86_64/Gtrace.c
+
+# The list of local files that go to Power 64 and 32:
+libunwind_la_SOURCES_ppc = \
+	ppc/Lget_proc_info.c ppc/Lget_save_loc.c ppc/Linit_local.c	\
+	ppc/Linit_remote.c ppc/Lis_signal_frame.c
+
+# The list of generic files that go to Power 64 and 32:
+libunwind_ppc_la_SOURCES_ppc_generic = \
+	ppc/Gget_proc_info.c ppc/Gget_save_loc.c ppc/Ginit_local.c	\
+	ppc/Ginit_remote.c ppc/Gis_signal_frame.c
+
+# The list of files that go both into libunwind and libunwind-ppc32:
+noinst_HEADERS += ppc32/init.h ppc32/unwind_i.h ppc32/ucontext_i.h
+libunwind_la_SOURCES_ppc32_common = $(libunwind_la_SOURCES_common)      \
+	ppc32/is_fpreg.c ppc32/regname.c ppc32/get_func_addr.c
+
+# The list of files that go into libunwind:
+libunwind_la_SOURCES_ppc32 = $(libunwind_la_SOURCES_ppc32_common)       \
+	$(libunwind_la_SOURCES_local)                                   \
+	$(libunwind_la_SOURCES_ppc)					\
+	ppc32/Lapply_reg_state.c ppc32/Lreg_states_iterate.c		\
+	ppc32/Lcreate_addr_space.c					\
+	ppc32/Lglobal.c ppc32/Linit.c					\
+	ppc32/Lregs.c ppc32/Lresume.c ppc32/Lstep.c
+
+# The list of files that go into libunwind-ppc32:
+libunwind_ppc32_la_SOURCES_ppc32 = $(libunwind_la_SOURCES_ppc32_common) \
+	$(libunwind_la_SOURCES_generic)                                 \
+	$(libunwind_ppc_la_SOURCES_ppc_generic)				\
+	ppc32/Gapply_reg_state.c ppc32/Greg_states_iterate.c		\
+	ppc32/Gcreate_addr_space.c					\
+	ppc32/Gglobal.c ppc32/Ginit.c					\
+	ppc32/Gregs.c ppc32/Gresume.c ppc32/Gstep.c
+
+# The list of files that go both into libunwind and libunwind-ppc64:
+noinst_HEADERS += ppc64/init.h ppc64/unwind_i.h ppc64/ucontext_i.h
+libunwind_la_SOURCES_ppc64_common = $(libunwind_la_SOURCES_common)      \
+        ppc64/is_fpreg.c ppc64/regname.c ppc64/get_func_addr.c
+
+# The list of files that go into libunwind:
+libunwind_la_SOURCES_ppc64 = $(libunwind_la_SOURCES_ppc64_common)       \
+        $(libunwind_la_SOURCES_local)                                   \
+	$(libunwind_la_SOURCES_ppc)					\
+	ppc64/Lapply_reg_state.c ppc64/Lreg_states_iterate.c		\
+	ppc64/Lcreate_addr_space.c					\
+	ppc64/Lglobal.c ppc64/Linit.c					\
+	ppc64/Lregs.c ppc64/Lresume.c ppc64/Lstep.c
+
+# The list of files that go into libunwind-ppc64:
+libunwind_ppc64_la_SOURCES_ppc64 = $(libunwind_la_SOURCES_ppc64_common) \
+        $(libunwind_la_SOURCES_generic)                                 \
+	$(libunwind_ppc_la_SOURCES_ppc_generic)				\
+	ppc64/Gapply_reg_state.c ppc64/Greg_states_iterate.c		\
+	ppc64/Gcreate_addr_space.c					\
+	ppc64/Gglobal.c ppc64/Ginit.c					\
+	ppc64/Gregs.c ppc64/Gresume.c ppc64/Gstep.c
+
+# The list of files that go into libunwind and libunwind-sh:
+noinst_HEADERS += sh/init.h sh/offsets.h sh/unwind_i.h
+libunwind_la_SOURCES_sh_common = $(libunwind_la_SOURCES_common)		\
+	sh/is_fpreg.c sh/regname.c
+
+# The list of files that go into libunwind:
+libunwind_la_SOURCES_sh = $(libunwind_la_SOURCES_sh_common)		\
+	$(libunwind_la_SOURCES_local)					\
+	sh/Lapply_reg_state.c sh/Lreg_states_iterate.c			\
+	sh/Lcreate_addr_space.c sh/Lget_proc_info.c sh/Lget_save_loc.c	\
+	sh/Lglobal.c sh/Linit.c sh/Linit_local.c sh/Linit_remote.c	\
+	sh/Lis_signal_frame.c sh/Lregs.c sh/Lresume.c sh/Lstep.c
+
+libunwind_sh_la_SOURCES_sh = $(libunwind_la_SOURCES_sh_common)		\
+	$(libunwind_la_SOURCES_generic)					\
+	sh/Gapply_reg_state.c sh/Greg_states_iterate.c			\
+	sh/Gcreate_addr_space.c sh/Gget_proc_info.c sh/Gget_save_loc.c	\
+	sh/Gglobal.c sh/Ginit.c sh/Ginit_local.c sh/Ginit_remote.c	\
+	sh/Gis_signal_frame.c sh/Gregs.c sh/Gresume.c sh/Gstep.c
+
+# The list of files that go both into libunwind and libunwind-s390x:
+noinst_HEADERS += s390x/init.h s390x/unwind_i.h
+libunwind_la_SOURCES_s390x_common = $(libunwind_la_SOURCES_common)	\
+	s390x/is_fpreg.c s390x/regname.c
+
+# The list of files that go into libunwind:
+libunwind_la_SOURCES_s390x = $(libunwind_la_SOURCES_s390x_common)	    \
+	$(libunwind_la_SOURCES_local)					    \
+	s390x/Lapply_reg_state.c s390x/Lreg_states_iterate.c		    \
+	s390x/Lcreate_addr_space.c s390x/Lget_save_loc.c s390x/Lglobal.c    \
+	s390x/Linit.c s390x/Linit_local.c s390x/Linit_remote.c	            \
+	s390x/Lget_proc_info.c s390x/Lregs.c s390x/Lresume.c		    \
+	s390x/Lis_signal_frame.c s390x/Lstep.c				    \
+	s390x/getcontext.S s390x/setcontext.S
+
+# The list of files that go into libunwind-s390x:
+libunwind_s390x_la_SOURCES_s390x = $(libunwind_la_SOURCES_s390x_common)     \
+	$(libunwind_la_SOURCES_generic)					    \
+	s390x/Gapply_reg_state.c s390x/Greg_states_iterate.c	            \
+	s390x/Gcreate_addr_space.c s390x/Gget_save_loc.c s390x/Gglobal.c    \
+	s390x/Ginit.c s390x/Ginit_local.c s390x/Ginit_remote.c	            \
+	s390x/Gget_proc_info.c s390x/Gregs.c s390x/Gresume.c		    \
+	s390x/Gis_signal_frame.c s390x/Gstep.c
+
+if REMOTE_ONLY
+install-exec-hook:
+#	Nothing to do here....
+else
+#
+# This is not ideal, but I know of no other way to install an
+# alias for a library.  For the shared version, we have to do
+# a file check before creating the link, because it isn't going
+# to be there if the user configured with --disable-shared.
+#
+install-exec-hook:
+	if test -f $(DESTDIR)$(libdir)/libunwind-$(arch).a; then \
+		cd $(DESTDIR)$(libdir) && $(LN_S) -f libunwind-$(arch).a libunwind-generic.a; \
+	fi
+	if test -f $(DESTDIR)$(libdir)/libunwind-$(arch).so; then \
+		cd $(DESTDIR)$(libdir) && $(LN_S) -f libunwind-$(arch).so \
+		libunwind-generic.so; \
+	fi
+endif
+
+if OS_LINUX
+ libunwind_la_SOURCES_os	      = $(libunwind_la_SOURCES_os_linux)
+ libunwind_la_SOURCES_os_local	      = $(libunwind_la_SOURCES_os_linux_local)
+ libunwind_la_SOURCES_x86_os          = x86/Gos-linux.c
+ libunwind_x86_la_SOURCES_os	      = x86/getcontext-linux.S
+ libunwind_la_SOURCES_x86_os_local    = x86/Los-linux.c
+ libunwind_la_SOURCES_x86_64_os       = x86_64/Gos-linux.c
+ libunwind_la_SOURCES_x86_64_os_local = x86_64/Los-linux.c
+ libunwind_la_SOURCES_arm_os          = arm/Gos-linux.c
+ libunwind_la_SOURCES_arm_os_local    = arm/Los-linux.c
+ libunwind_coredump_la_SOURCES += coredump/_UCD_access_reg_linux.c
+endif
+
+if OS_HPUX
+ libunwind_la_SOURCES_os	= $(libunwind_la_SOURCES_os_hpux)
+ libunwind_la_SOURCES_os_local	= $(libunwind_la_SOURCES_os_hpux_local)
+endif
+
+if OS_FREEBSD
+ libunwind_la_SOURCES_os	= $(libunwind_la_SOURCES_os_freebsd)
+ libunwind_la_SOURCES_os_local	= $(libunwind_la_SOURCES_os_freebsd_local)
+ libunwind_la_SOURCES_x86_os          = x86/Gos-freebsd.c
+ libunwind_x86_la_SOURCES_os	      = x86/getcontext-freebsd.S
+ libunwind_la_SOURCES_x86_os_local    = x86/Los-freebsd.c
+ libunwind_la_SOURCES_x86_64_os       = x86_64/Gos-freebsd.c
+ libunwind_la_SOURCES_x86_64_os_local = x86_64/Los-freebsd.c
+ libunwind_la_SOURCES_arm_os          = arm/Gos-freebsd.c
+ libunwind_la_SOURCES_arm_os_local    = arm/Los-freebsd.c
+ libunwind_coredump_la_SOURCES += coredump/_UCD_access_reg_freebsd.c
+endif
+
+if OS_QNX
+ libunwind_la_SOURCES_os	= $(libunwind_la_SOURCES_os_qnx)
+ libunwind_la_SOURCES_os_local	= $(libunwind_la_SOURCES_os_qnx_local)
+ libunwind_la_SOURCES_arm_os          = arm/Gos-other.c
+ libunwind_la_SOURCES_arm_os_local    = arm/Los-other.c
+endif
+
+if ARCH_AARCH64
+ lib_LTLIBRARIES += libunwind-aarch64.la
+ libunwind_la_SOURCES = $(libunwind_la_SOURCES_aarch64)
+ libunwind_aarch64_la_SOURCES = $(libunwind_aarch64_la_SOURCES_aarch64)
+ libunwind_aarch64_la_LDFLAGS = $(COMMON_SO_LDFLAGS) -version-info $(SOVERSION)
+ libunwind_aarch64_la_LIBADD = libunwind-dwarf-generic.la
+ libunwind_aarch64_la_LIBADD += libunwind-elf64.la
+if !REMOTE_ONLY
+ libunwind_aarch64_la_LIBADD += libunwind.la -lc
+endif
+ libunwind_setjmp_la_SOURCES += aarch64/siglongjmp.S
+else
+if ARCH_ARM
+ lib_LTLIBRARIES += libunwind-arm.la
+ libunwind_la_SOURCES = $(libunwind_la_SOURCES_arm)
+ libunwind_arm_la_SOURCES = $(libunwind_arm_la_SOURCES_arm)
+ libunwind_arm_la_LDFLAGS = $(COMMON_SO_LDFLAGS) -version-info $(SOVERSION)
+ libunwind_arm_la_LIBADD = libunwind-dwarf-generic.la
+ libunwind_arm_la_LIBADD += libunwind-elf32.la
+if !REMOTE_ONLY
+ libunwind_arm_la_LIBADD += libunwind.la -lc
+endif
+ libunwind_setjmp_la_SOURCES += arm/siglongjmp.S
+else
+if ARCH_IA64
+ BUILT_SOURCES = Gcursor_i.h Lcursor_i.h
+mk_Gcursor_i.s: $(srcdir)/ia64/mk_Gcursor_i.c
+	$(COMPILE) -S "$(srcdir)/ia64/mk_Gcursor_i.c" -o mk_Gcursor_i.s
+mk_Lcursor_i.s: $(srcdir)/ia64/mk_Lcursor_i.c
+	$(COMPILE) -S "$(srcdir)/ia64/mk_Lcursor_i.c" -o mk_Lcursor_i.s
+Gcursor_i.h: mk_Gcursor_i.s
+	"$(srcdir)/ia64/mk_cursor_i" mk_Gcursor_i.s > Gcursor_i.h
+Lcursor_i.h: mk_Lcursor_i.s
+	"$(srcdir)/ia64/mk_cursor_i" mk_Lcursor_i.s > Lcursor_i.h
+
+ lib_LTLIBRARIES += libunwind-ia64.la
+ libunwind_la_SOURCES = $(libunwind_la_SOURCES_ia64)
+ libunwind_ia64_la_SOURCES = $(libunwind_ia64_la_SOURCES_ia64)
+ libunwind_ia64_la_LDFLAGS = $(COMMON_SO_LDFLAGS) -version-info $(SOVERSION)
+ libunwind_ia64_la_LIBADD = libunwind-elf64.la
+if !REMOTE_ONLY
+ libunwind_ia64_la_LIBADD += libunwind.la -lc
+endif
+ libunwind_setjmp_la_SOURCES += ia64/setjmp.S  ia64/sigsetjmp.S  \
+				ia64/longjmp.S ia64/siglongjmp.S
+else
+if ARCH_HPPA
+ lib_LTLIBRARIES += libunwind-hppa.la
+ libunwind_la_SOURCES = $(libunwind_la_SOURCES_hppa)
+ libunwind_hppa_la_SOURCES = $(libunwind_hppa_la_SOURCES_hppa)
+ libunwind_hppa_la_LDFLAGS = $(COMMON_SO_LDFLAGS) -version-info $(SOVERSION)
+ libunwind_hppa_la_LIBADD = libunwind-dwarf-generic.la
+ libunwind_hppa_la_LIBADD += libunwind-elf32.la
+if !REMOTE_ONLY
+ libunwind_hppa_la_LIBADD += libunwind.la -lc
+endif
+ libunwind_setjmp_la_SOURCES += hppa/siglongjmp.S
+else
+if ARCH_MIPS
+ lib_LTLIBRARIES += libunwind-mips.la
+ libunwind_la_SOURCES = $(libunwind_la_SOURCES_mips)
+ libunwind_mips_la_SOURCES = $(libunwind_mips_la_SOURCES_mips)
+ libunwind_mips_la_LDFLAGS = $(COMMON_SO_LDFLAGS) -version-info $(SOVERSION)
+ libunwind_mips_la_LIBADD = libunwind-dwarf-generic.la
+ libunwind_mips_la_LIBADD += libunwind-elfxx.la
+if !REMOTE_ONLY
+ libunwind_mips_la_LIBADD += libunwind.la -lc
+endif
+ libunwind_setjmp_la_SOURCES += mips/siglongjmp.S
+else
+if ARCH_TILEGX
+ lib_LTLIBRARIES += libunwind-tilegx.la
+ libunwind_la_SOURCES = $(libunwind_la_SOURCES_tilegx)
+ libunwind_tilegx_la_SOURCES = $(libunwind_tilegx_la_SOURCES_tilegx)
+ libunwind_tilegx_la_LDFLAGS = $(COMMON_SO_LDFLAGS) -version-info $(SOVERSION)
+ libunwind_tilegx_la_LIBADD = libunwind-dwarf-generic.la
+ libunwind_tilegx_la_LIBADD += libunwind-elfxx.la
+if !REMOTE_ONLY
+ libunwind_tilegx_la_LIBADD += libunwind.la -lc
+endif
+ libunwind_setjmp_la_SOURCES += tilegx/siglongjmp.S
+else
+if ARCH_X86
+ lib_LTLIBRARIES += libunwind-x86.la
+ libunwind_la_SOURCES = $(libunwind_la_SOURCES_x86) $(libunwind_x86_la_SOURCES_os)
+ libunwind_x86_la_SOURCES = $(libunwind_x86_la_SOURCES_x86)
+ libunwind_x86_la_LDFLAGS = $(COMMON_SO_LDFLAGS) -version-info $(SOVERSION)
+ libunwind_x86_la_LIBADD = libunwind-dwarf-generic.la
+ libunwind_x86_la_LIBADD += libunwind-elf32.la
+if !REMOTE_ONLY
+ libunwind_x86_la_LIBADD += libunwind.la -lc
+endif
+ libunwind_setjmp_la_SOURCES += x86/longjmp.S x86/siglongjmp.S
+else
+if ARCH_X86_64
+ lib_LTLIBRARIES += libunwind-x86_64.la
+ libunwind_la_SOURCES = $(libunwind_la_SOURCES_x86_64)
+ libunwind_x86_64_la_SOURCES = $(libunwind_x86_64_la_SOURCES_x86_64)
+ libunwind_x86_64_la_LDFLAGS = $(COMMON_SO_LDFLAGS) -version-info $(SOVERSION)
+ libunwind_x86_64_la_LIBADD = libunwind-dwarf-generic.la
+ libunwind_x86_64_la_LIBADD += libunwind-elf64.la
+if !REMOTE_ONLY
+ libunwind_x86_64_la_LIBADD += libunwind.la -lc
+endif
+ libunwind_setjmp_la_SOURCES += x86_64/longjmp.S x86_64/siglongjmp.S
+else
+if ARCH_PPC32
+ lib_LTLIBRARIES += libunwind-ppc32.la
+ libunwind_la_SOURCES = $(libunwind_la_SOURCES_ppc32)
+ libunwind_ppc32_la_SOURCES = $(libunwind_ppc32_la_SOURCES_ppc32)
+ libunwind_ppc32_la_LDFLAGS = $(COMMON_SO_LDFLAGS) -version-info $(SOVERSION)
+ libunwind_ppc32_la_LIBADD = libunwind-dwarf-generic.la
+ libunwind_ppc32_la_LIBADD += libunwind-elf32.la
+if !REMOTE_ONLY
+ libunwind_ppc32_la_LIBADD += libunwind.la -lc
+endif
+ libunwind_setjmp_la_SOURCES += ppc/longjmp.S ppc/siglongjmp.S
+else
+if ARCH_PPC64
+ lib_LTLIBRARIES += libunwind-ppc64.la
+ libunwind_la_SOURCES = $(libunwind_la_SOURCES_ppc64)
+ libunwind_ppc64_la_SOURCES = $(libunwind_ppc64_la_SOURCES_ppc64)
+ libunwind_ppc64_la_LDFLAGS = $(COMMON_SO_LDFLAGS) -version-info $(SOVERSION)
+ libunwind_ppc64_la_LIBADD = libunwind-dwarf-generic.la
+ libunwind_ppc64_la_LIBADD += libunwind-elf64.la
+if !REMOTE_ONLY
+ libunwind_ppc64_la_LIBADD += libunwind.la -lc
+endif
+ libunwind_setjmp_la_SOURCES += ppc/longjmp.S ppc/siglongjmp.S
+else
+if ARCH_SH
+ lib_LTLIBRARIES += libunwind-sh.la
+ libunwind_la_SOURCES = $(libunwind_la_SOURCES_sh)
+ libunwind_sh_la_SOURCES = $(libunwind_sh_la_SOURCES_sh)
+ libunwind_sh_la_LDFLAGS = $(COMMON_SO_LDFLAGS) -version-info $(SOVERSION)
+ libunwind_sh_la_LIBADD = libunwind-dwarf-generic.la
+ libunwind_sh_la_LIBADD += libunwind-elf32.la
+if !REMOTE_ONLY
+ libunwind_sh_la_LIBADD += libunwind.la -lc
+endif
+ libunwind_setjmp_la_SOURCES += sh/siglongjmp.S
+else
+if ARCH_S390X
+ lib_LTLIBRARIES += libunwind-s390x.la
+ libunwind_la_SOURCES = $(libunwind_la_SOURCES_s390x)
+ libunwind_s390x_la_SOURCES = $(libunwind_s390x_la_SOURCES_s390x)
+ libunwind_s390x_la_LDFLAGS = $(COMMON_SO_LDFLAGS) -version-info $(SOVERSION)
+ libunwind_s390x_la_LIBADD = libunwind-dwarf-generic.la
+ libunwind_s390x_la_LIBADD += libunwind-elf64.la
+if !REMOTE_ONLY
+ libunwind_s390x_la_LIBADD += libunwind.la -lc
+endif
+
+endif # ARCH_S390X
+endif # ARCH_SH
+endif # ARCH_PPC64
+endif # ARCH_PPC32
+endif # ARCH_X86_64
+endif # ARCH_X86
+endif # ARCH_TILEGX
+endif # ARCH_MIPS
+endif # ARCH_HPPA
+endif # ARCH_IA64
+endif # ARCH_ARM
+endif # ARCH_AARCH64
+
+# libunwind-setjmp depends on libunwind-$(arch). Therefore must be added
+# at the end.
+if BUILD_SETJMP
+lib_LTLIBRARIES += libunwind-setjmp.la
+endif
+
+#
+# Don't link with standard libraries, because those may mention
+# libunwind already.
+#
+libunwind_la_LDFLAGS =	$(COMMON_SO_LDFLAGS) -XCClinker -nostdlib \
+			$(LDFLAGS_STATIC_LIBCXA) -version-info $(SOVERSION)
+libunwind_la_LIBADD  += -lc $(LIBCRTS)
+libunwind_la_LIBADD += $(LIBLZMA)
+
+AM_CPPFLAGS = -I$(top_srcdir)/include -I$(top_srcdir)/include/tdep-$(arch) -I.
+AM_CCASFLAGS = $(AM_CPPFLAGS)
+noinst_HEADERS += unwind/unwind-internal.h
+
+EXTRA_DIST =	$(libunwind_la_SOURCES_aarch64)			\
+		$(libunwind_la_SOURCES_arm)			\
+		$(libunwind_la_SOURCES_hppa)			\
+		$(libunwind_la_SOURCES_ia64)			\
+		$(libunwind_la_SOURCES_mips)			\
+		$(libunwind_la_SOURCES_sh)			\
+		$(libunwind_la_SOURCES_x86)			\
+		$(libunwind_la_SOURCES_os_freebsd)		\
+		$(libunwind_la_SOURCES_os_linux)		\
+		$(libunwind_la_SOURCES_os_hpux)			\
+		$(libunwind_la_SOURCES_os_qnx)			\
+		$(libunwind_la_SOURCES_common)			\
+		$(libunwind_la_SOURCES_local)			\
+		$(libunwind_la_SOURCES_generic)			\
+		$(libunwind_aarch64_la_SOURCES_aarch64)		\
+		$(libunwind_arm_la_SOURCES_arm)			\
+		$(libunwind_hppa_la_SOURCES_hppa)		\
+		$(libunwind_ia64_la_SOURCES_ia64)		\
+		$(libunwind_mips_la_SOURCES_mips)		\
+		$(libunwind_sh_la_SOURCES_sh)			\
+		$(libunwind_x86_la_SOURCES_x86)			\
+		$(libunwind_x86_64_la_SOURCES_x86_64)
+
+MAINTAINERCLEANFILES = Makefile.in
+
+# The -version-info flag accepts an argument of the form
+# `current[:revision[:age]]'. So, passing `-version-info 3:12:1' sets
+# current to 3, revision to 12, and age to 1.
+
+# If either revision or age are omitted, they default to 0. Also note
+# that age must be less than or equal to the current interface number.
+
+# Here are a set of rules to help you update your library version
+# information:
+
+#    1. Start with version information of `0:0:0' for each libtool
+#       library.
+
+#    2. Update the version information only immediately before a public
+#       release of your software. More frequent updates are unnecessary,
+#       and only guarantee that the current interface number gets larger
+#       faster.
+
+#    3. If the library source code has changed at all since the last
+#       update, then increment revision (`c:r:a' becomes `c:r+1:a').
+
+#    4. If any interfaces have been added, removed, or changed since the
+#       last update, increment current, and set revision to 0.
+
+#    5. If any interfaces have been added since the last public release,
+#       then increment age.
+
+#    6. If any interfaces have been removed since the last public
+#       release, then set age to 0.
diff --git a/src/third_party/unwind/dist/src/Makefile.in b/src/third_party/unwind/dist/src/Makefile.in
new file mode 100644
index 00000000000..2645d23f057
--- /dev/null
+++ b/src/third_party/unwind/dist/src/Makefile.in
@@ -0,0 +1,3859 @@
+# Makefile.in generated by automake 1.15.1 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2017 Free Software Foundation, Inc.
+
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
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+
+
+
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+am__is_gnu_make = { \
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+    false; \
+  fi; \
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+am__make_running_with_option = \
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+    test $$skip_next = yes && { skip_next=no; continue; }; \
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+      *=*|--*) continue;; \
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+      -*O?*) strip_trailopt 'O';; \
+        -*l) strip_trailopt 'l'; skip_next=yes;; \
+      -*l?*) strip_trailopt 'l';; \
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+      -[JT]) skip_next=yes;; \
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+am__make_dryrun = (target_option=n; $(am__make_running_with_option))
+am__make_keepgoing = (target_option=k; $(am__make_running_with_option))
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+transform = $(program_transform_name)
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+PRE_INSTALL = :
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+host_triplet = @host@
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+@BUILD_PTRACE_TRUE@am__append_5 = ptrace/libunwind-ptrace.pc
+@BUILD_SETJMP_TRUE@am__append_6 = setjmp/libunwind-setjmp.pc
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+@REMOTE_ONLY_FALSE@@USE_DWARF_TRUE@am__append_9 = libunwind-dwarf-local.la
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+@OS_FREEBSD_TRUE@am__append_12 = coredump/_UCD_access_reg_freebsd.c
+@ARCH_AARCH64_TRUE@am__append_13 = libunwind-aarch64.la
+@ARCH_AARCH64_TRUE@@REMOTE_ONLY_FALSE@am__append_14 = libunwind.la -lc
+@ARCH_AARCH64_TRUE@am__append_15 = aarch64/siglongjmp.S
+@ARCH_AARCH64_FALSE@@ARCH_ARM_TRUE@am__append_16 = libunwind-arm.la
+@ARCH_AARCH64_FALSE@@ARCH_ARM_TRUE@@REMOTE_ONLY_FALSE@am__append_17 = libunwind.la -lc
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+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_IA64_TRUE@am__append_19 = libunwind-ia64.la
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_IA64_TRUE@@REMOTE_ONLY_FALSE@am__append_20 = libunwind.la -lc
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+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_IA64_TRUE@				ia64/longjmp.S ia64/siglongjmp.S
+
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_TRUE@@ARCH_IA64_FALSE@am__append_22 = libunwind-hppa.la
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_TRUE@@ARCH_IA64_FALSE@@REMOTE_ONLY_FALSE@am__append_23 = libunwind.la -lc
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_TRUE@@ARCH_IA64_FALSE@am__append_24 = hppa/siglongjmp.S
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+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_PPC32_TRUE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_FALSE@@ARCH_X86_FALSE@am__append_39 = ppc/longjmp.S ppc/siglongjmp.S
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_PPC32_FALSE@@ARCH_PPC64_TRUE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_FALSE@@ARCH_X86_FALSE@am__append_40 = libunwind-ppc64.la
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+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_PPC32_FALSE@@ARCH_PPC64_TRUE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_FALSE@@ARCH_X86_FALSE@am__append_42 = ppc/longjmp.S ppc/siglongjmp.S
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_PPC32_FALSE@@ARCH_PPC64_FALSE@@ARCH_SH_TRUE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_FALSE@@ARCH_X86_FALSE@am__append_43 = libunwind-sh.la
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_PPC32_FALSE@@ARCH_PPC64_FALSE@@ARCH_SH_TRUE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_FALSE@@ARCH_X86_FALSE@@REMOTE_ONLY_FALSE@am__append_44 = libunwind.la -lc
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_PPC32_FALSE@@ARCH_PPC64_FALSE@@ARCH_SH_TRUE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_FALSE@@ARCH_X86_FALSE@am__append_45 = sh/siglongjmp.S
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+
+# libunwind-setjmp depends on libunwind-$(arch). Therefore must be added
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+	ia64/Linstall_cursor.lo ia64/Lis_signal_frame.lo \
+	ia64/Lparser.lo ia64/Lrbs.lo ia64/Lregs.lo ia64/Lresume.lo \
+	ia64/Lscript.lo ia64/Lstep.lo ia64/Ltables.lo \
+	ia64/Lfind_unwind_table.lo
+@OS_FREEBSD_FALSE@@OS_LINUX_FALSE@@OS_QNX_TRUE@am__objects_68 = arm/Los-other.lo
+@OS_FREEBSD_FALSE@@OS_LINUX_TRUE@am__objects_68 = arm/Los-linux.lo
+@OS_FREEBSD_TRUE@am__objects_68 = arm/Los-freebsd.lo
+am__objects_69 = $(am__objects_10) $(am__objects_68) $(am__objects_53) \
+	arm/getcontext.lo arm/Lapply_reg_state.lo \
+	arm/Lreg_states_iterate.lo arm/Lcreate_addr_space.lo \
+	arm/Lget_proc_info.lo arm/Lget_save_loc.lo arm/Lglobal.lo \
+	arm/Linit.lo arm/Linit_local.lo arm/Linit_remote.lo \
+	arm/Lregs.lo arm/Lresume.lo arm/Lstep.lo arm/Lex_tables.lo \
+	arm/Lstash_frame.lo arm/Ltrace.lo
+am__objects_70 = $(am__objects_7) $(am__objects_53) \
+	aarch64/Lapply_reg_state.lo aarch64/Lreg_states_iterate.lo \
+	aarch64/Lcreate_addr_space.lo aarch64/Lget_proc_info.lo \
+	aarch64/Lget_save_loc.lo aarch64/Lglobal.lo aarch64/Linit.lo \
+	aarch64/Linit_local.lo aarch64/Linit_remote.lo \
+	aarch64/Lis_signal_frame.lo aarch64/Lregs.lo \
+	aarch64/Lresume.lo aarch64/Lstash_frame.lo aarch64/Lstep.lo \
+	aarch64/Ltrace.lo aarch64/getcontext.lo
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_PPC32_FALSE@@ARCH_PPC64_FALSE@@ARCH_S390X_TRUE@@ARCH_SH_FALSE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_FALSE@@ARCH_X86_FALSE@am_libunwind_la_OBJECTS = $(am__objects_54)
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+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_PPC32_TRUE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_FALSE@@ARCH_X86_FALSE@am_libunwind_la_OBJECTS = $(am__objects_58)
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+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_TILEGX_FALSE@@ARCH_X86_TRUE@	$(am__objects_63)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_TILEGX_TRUE@am_libunwind_la_OBJECTS = $(am__objects_64)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_TRUE@am_libunwind_la_OBJECTS = $(am__objects_65)
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+@ARCH_AARCH64_FALSE@@ARCH_ARM_TRUE@am_libunwind_la_OBJECTS =  \
+@ARCH_AARCH64_FALSE@@ARCH_ARM_TRUE@	$(am__objects_69)
+@ARCH_AARCH64_TRUE@am_libunwind_la_OBJECTS = $(am__objects_70)
+libunwind_la_OBJECTS = $(am_libunwind_la_OBJECTS)
+libunwind_la_LINK = $(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) \
+	$(LIBTOOLFLAGS) --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) \
+	$(libunwind_la_LDFLAGS) $(LDFLAGS) -o $@
+@REMOTE_ONLY_FALSE@am_libunwind_la_rpath = -rpath $(libdir)
+AM_V_P = $(am__v_P_@AM_V@)
+am__v_P_ = $(am__v_P_@AM_DEFAULT_V@)
+am__v_P_0 = false
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+am__v_GEN_0 = @echo "  GEN     " $@;
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+AM_V_at = $(am__v_at_@AM_V@)
+am__v_at_ = $(am__v_at_@AM_DEFAULT_V@)
+am__v_at_0 = @
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+am__depfiles_maybe = depfiles
+am__mv = mv -f
+CPPASCOMPILE = $(CCAS) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) \
+	$(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CCASFLAGS) $(CCASFLAGS)
+LTCPPASCOMPILE = $(LIBTOOL) $(AM_V_lt) $(AM_LIBTOOLFLAGS) \
+	$(LIBTOOLFLAGS) --mode=compile $(CCAS) $(DEFS) \
+	$(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) \
+	$(AM_CCASFLAGS) $(CCASFLAGS)
+AM_V_CPPAS = $(am__v_CPPAS_@AM_V@)
+am__v_CPPAS_ = $(am__v_CPPAS_@AM_DEFAULT_V@)
+am__v_CPPAS_0 = @echo "  CPPAS   " $@;
+am__v_CPPAS_1 = 
+COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \
+	$(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
+LTCOMPILE = $(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) \
+	$(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) \
+	$(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) \
+	$(AM_CFLAGS) $(CFLAGS)
+AM_V_CC = $(am__v_CC_@AM_V@)
+am__v_CC_ = $(am__v_CC_@AM_DEFAULT_V@)
+am__v_CC_0 = @echo "  CC      " $@;
+am__v_CC_1 = 
+CCLD = $(CC)
+LINK = $(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) \
+	$(LIBTOOLFLAGS) --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) \
+	$(AM_LDFLAGS) $(LDFLAGS) -o $@
+AM_V_CCLD = $(am__v_CCLD_@AM_V@)
+am__v_CCLD_ = $(am__v_CCLD_@AM_DEFAULT_V@)
+am__v_CCLD_0 = @echo "  CCLD    " $@;
+am__v_CCLD_1 = 
+SOURCES = $(libunwind_aarch64_la_SOURCES) $(libunwind_arm_la_SOURCES) \
+	$(libunwind_coredump_la_SOURCES) \
+	$(libunwind_dwarf_common_la_SOURCES) \
+	$(libunwind_dwarf_generic_la_SOURCES) \
+	$(libunwind_dwarf_local_la_SOURCES) \
+	$(libunwind_elf32_la_SOURCES) $(libunwind_elf64_la_SOURCES) \
+	$(libunwind_elfxx_la_SOURCES) $(libunwind_hppa_la_SOURCES) \
+	$(libunwind_ia64_la_SOURCES) $(libunwind_mips_la_SOURCES) \
+	$(libunwind_ppc32_la_SOURCES) $(libunwind_ppc64_la_SOURCES) \
+	$(libunwind_ptrace_la_SOURCES) $(libunwind_s390x_la_SOURCES) \
+	$(libunwind_setjmp_la_SOURCES) $(libunwind_sh_la_SOURCES) \
+	$(libunwind_tilegx_la_SOURCES) $(libunwind_x86_la_SOURCES) \
+	$(libunwind_x86_64_la_SOURCES) $(libunwind_la_SOURCES)
+DIST_SOURCES = $(am__libunwind_aarch64_la_SOURCES_DIST) \
+	$(am__libunwind_arm_la_SOURCES_DIST) \
+	$(am__libunwind_coredump_la_SOURCES_DIST) \
+	$(libunwind_dwarf_common_la_SOURCES) \
+	$(libunwind_dwarf_generic_la_SOURCES) \
+	$(libunwind_dwarf_local_la_SOURCES) \
+	$(libunwind_elf32_la_SOURCES) $(libunwind_elf64_la_SOURCES) \
+	$(libunwind_elfxx_la_SOURCES) \
+	$(am__libunwind_hppa_la_SOURCES_DIST) \
+	$(am__libunwind_ia64_la_SOURCES_DIST) \
+	$(am__libunwind_mips_la_SOURCES_DIST) \
+	$(am__libunwind_ppc32_la_SOURCES_DIST) \
+	$(am__libunwind_ppc64_la_SOURCES_DIST) \
+	$(libunwind_ptrace_la_SOURCES) \
+	$(am__libunwind_s390x_la_SOURCES_DIST) \
+	$(am__libunwind_setjmp_la_SOURCES_DIST) \
+	$(am__libunwind_sh_la_SOURCES_DIST) \
+	$(am__libunwind_tilegx_la_SOURCES_DIST) \
+	$(am__libunwind_x86_la_SOURCES_DIST) \
+	$(am__libunwind_x86_64_la_SOURCES_DIST) \
+	$(am__libunwind_la_SOURCES_DIST)
+am__can_run_installinfo = \
+  case $$AM_UPDATE_INFO_DIR in \
+    n|no|NO) false;; \
+    *) (install-info --version) >/dev/null 2>&1;; \
+  esac
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+HEADERS = $(noinst_HEADERS)
+am__tagged_files = $(HEADERS) $(SOURCES) $(TAGS_FILES) $(LISP)
+# Read a list of newline-separated strings from the standard input,
+# and print each of them once, without duplicates.  Input order is
+# *not* preserved.
+am__uniquify_input = $(AWK) '\
+  BEGIN { nonempty = 0; } \
+  { items[$$0] = 1; nonempty = 1; } \
+  END { if (nonempty) { for (i in items) print i; }; } \
+'
+# Make sure the list of sources is unique.  This is necessary because,
+# e.g., the same source file might be shared among _SOURCES variables
+# for different programs/libraries.
+am__define_uniq_tagged_files = \
+  list='$(am__tagged_files)'; \
+  unique=`for i in $$list; do \
+    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+  done | $(am__uniquify_input)`
+ETAGS = etags
+CTAGS = ctags
+am__DIST_COMMON = $(srcdir)/Makefile.in \
+	$(srcdir)/libunwind-generic.pc.in $(top_srcdir)/config/depcomp
+DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
+ACLOCAL = @ACLOCAL@
+AMTAR = @AMTAR@
+AM_DEFAULT_VERBOSITY = @AM_DEFAULT_VERBOSITY@
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+INSTALL_SCRIPT = @INSTALL_SCRIPT@
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+PACKAGE_URL = @PACKAGE_URL@
+PACKAGE_VERSION = @PACKAGE_VERSION@
+PATH_SEPARATOR = @PATH_SEPARATOR@
+PKG_EXTRA = @PKG_EXTRA@
+PKG_MAINTAINER = @PKG_MAINTAINER@
+PKG_MAJOR = @PKG_MAJOR@
+PKG_MINOR = @PKG_MINOR@
+RANLIB = @RANLIB@
+SED = @SED@
+SET_MAKE = @SET_MAKE@
+SHELL = @SHELL@
+STRIP = @STRIP@
+VERSION = @VERSION@
+abs_builddir = @abs_builddir@
+abs_srcdir = @abs_srcdir@
+abs_top_builddir = @abs_top_builddir@
+abs_top_srcdir = @abs_top_srcdir@
+ac_ct_AR = @ac_ct_AR@
+ac_ct_CC = @ac_ct_CC@
+ac_ct_CXX = @ac_ct_CXX@
+ac_ct_DUMPBIN = @ac_ct_DUMPBIN@
+am__include = @am__include@
+am__leading_dot = @am__leading_dot@
+am__quote = @am__quote@
+am__tar = @am__tar@
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+arch = @arch@
+bindir = @bindir@
+build = @build@
+build_alias = @build_alias@
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+build_cpu = @build_cpu@
+build_os = @build_os@
+build_vendor = @build_vendor@
+builddir = @builddir@
+datadir = @datadir@
+datarootdir = @datarootdir@
+docdir = @docdir@
+dvidir = @dvidir@
+enable_cxx_exceptions = @enable_cxx_exceptions@
+enable_debug_frame = @enable_debug_frame@
+exec_prefix = @exec_prefix@
+host = @host@
+host_alias = @host_alias@
+host_cpu = @host_cpu@
+host_os = @host_os@
+host_vendor = @host_vendor@
+htmldir = @htmldir@
+includedir = @includedir@
+infodir = @infodir@
+install_sh = @install_sh@
+libdir = @libdir@
+libexecdir = @libexecdir@
+localedir = @localedir@
+localstatedir = @localstatedir@
+mandir = @mandir@
+mkdir_p = @mkdir_p@
+oldincludedir = @oldincludedir@
+pdfdir = @pdfdir@
+prefix = @prefix@
+program_transform_name = @program_transform_name@
+psdir = @psdir@
+runstatedir = @runstatedir@
+sbindir = @sbindir@
+sharedstatedir = @sharedstatedir@
+srcdir = @srcdir@
+sysconfdir = @sysconfdir@
+target = @target@
+target_alias = @target_alias@
+target_cpu = @target_cpu@
+target_os = @target_os@
+target_vendor = @target_vendor@
+top_build_prefix = @top_build_prefix@
+top_builddir = @top_builddir@
+top_srcdir = @top_srcdir@
+SOVERSION = 8:1:0		# See comments at end of file.
+SETJMP_SO_VERSION = 0:0:0
+COREDUMP_SO_VERSION = 0:0:0
+#
+# Don't link with start-files since we don't use any constructors/destructors:
+#
+COMMON_SO_LDFLAGS = $(LDFLAGS_NOSTARTFILES)
+lib_LIBRARIES = 
+lib_LTLIBRARIES = $(am__append_1) $(am__append_2) $(am__append_3) \
+	$(am__append_13) $(am__append_16) $(am__append_19) \
+	$(am__append_22) $(am__append_25) $(am__append_28) \
+	$(am__append_31) $(am__append_34) $(am__append_37) \
+	$(am__append_40) $(am__append_43) $(am__append_46) \
+	$(am__append_48)
+
+# The list of files that go into libunwind and libunwind-aarch64:
+
+# The list of files that go into libunwind and libunwind-arm:
+
+# The list of files that go both into libunwind and libunwind-ia64:
+
+# The list of files that go both into libunwind and libunwind-hppa:
+
+# The list of files that go info libunwind and libunwind-mips:
+
+# The list of files that go info libunwind and libunwind-tilegx:
+
+# The list of files that go both into libunwind and libunwind-x86:
+
+# The list of files that go both into libunwind and libunwind-x86_64:
+
+# The list of files that go both into libunwind and libunwind-ppc32:
+
+# The list of files that go both into libunwind and libunwind-ppc64:
+
+# The list of files that go into libunwind and libunwind-sh:
+
+# The list of files that go both into libunwind and libunwind-s390x:
+noinst_HEADERS = ptrace/_UPT_internal.h coredump/_UCD_internal.h \
+	coredump/_UCD_lib.h setjmp/setjmp_i.h os-linux.h elf32.h \
+	elf64.h elfxx.h aarch64/init.h aarch64/offsets.h \
+	aarch64/unwind_i.h arm/init.h arm/offsets.h arm/unwind_i.h \
+	ia64/init.h ia64/offsets.h ia64/regs.h ia64/ucontext_i.h \
+	ia64/unwind_decoder.h ia64/unwind_i.h hppa/init.h \
+	hppa/offsets.h hppa/unwind_i.h mips/init.h mips/offsets.h \
+	mips/unwind_i.h tilegx/init.h tilegx/offsets.h \
+	tilegx/unwind_i.h x86/init.h x86/offsets.h x86/unwind_i.h \
+	x86_64/offsets.h x86_64/init.h x86_64/unwind_i.h \
+	x86_64/ucontext_i.h ppc32/init.h ppc32/unwind_i.h \
+	ppc32/ucontext_i.h ppc64/init.h ppc64/unwind_i.h \
+	ppc64/ucontext_i.h sh/init.h sh/offsets.h sh/unwind_i.h \
+	s390x/init.h s390x/unwind_i.h unwind/unwind-internal.h
+noinst_LTLIBRARIES = $(am__append_8) $(am__append_9) $(LIBUNWIND_ELF)
+pkgconfigdir = $(libdir)/pkgconfig
+pkgconfig_DATA = libunwind-generic.pc $(am__append_4) $(am__append_5) \
+	$(am__append_6) $(am__append_7)
+
+### libunwind-ptrace:
+libunwind_ptrace_la_SOURCES = \
+	ptrace/_UPT_elf.c						  \
+	ptrace/_UPT_accessors.c ptrace/_UPT_access_fpreg.c		  \
+	ptrace/_UPT_access_mem.c ptrace/_UPT_access_reg.c		  \
+	ptrace/_UPT_create.c ptrace/_UPT_destroy.c			  \
+	ptrace/_UPT_find_proc_info.c ptrace/_UPT_get_dyn_info_list_addr.c \
+	ptrace/_UPT_put_unwind_info.c ptrace/_UPT_get_proc_name.c	  \
+	ptrace/_UPT_reg_offset.c ptrace/_UPT_resume.c
+
+
+### libunwind-coredump:
+libunwind_coredump_la_SOURCES = coredump/_UCD_accessors.c \
+	coredump/_UCD_create.c coredump/_UCD_destroy.c \
+	coredump/_UCD_access_mem.c coredump/_UCD_elf_map_image.c \
+	coredump/_UCD_find_proc_info.c coredump/_UCD_get_proc_name.c \
+	coredump/_UPT_elf.c coredump/_UPT_access_fpreg.c \
+	coredump/_UPT_get_dyn_info_list_addr.c \
+	coredump/_UPT_put_unwind_info.c coredump/_UPT_resume.c \
+	$(am__append_11) $(am__append_12)
+libunwind_coredump_la_LDFLAGS = $(COMMON_SO_LDFLAGS) \
+				-version-info $(COREDUMP_SO_VERSION)
+
+libunwind_coredump_la_LIBADD = $(LIBLZMA)
+
+### libunwind-setjmp:
+libunwind_setjmp_la_LDFLAGS = $(COMMON_SO_LDFLAGS)		     \
+					  -version-info $(SETJMP_SO_VERSION)
+
+@USE_ELF32_TRUE@LIBUNWIND_ELF = libunwind-elf32.la
+@USE_ELF64_TRUE@LIBUNWIND_ELF = libunwind-elf64.la
+@USE_ELFXX_TRUE@LIBUNWIND_ELF = libunwind-elfxx.la
+libunwind_setjmp_la_LIBADD = $(LIBUNWIND_ELF)	\
+					  libunwind-$(arch).la	\
+					  libunwind.la -lc
+
+libunwind_setjmp_la_SOURCES = setjmp/longjmp.c setjmp/siglongjmp.c \
+	$(am__append_15) $(am__append_18) $(am__append_21) \
+	$(am__append_24) $(am__append_27) $(am__append_30) \
+	$(am__append_33) $(am__append_36) $(am__append_39) \
+	$(am__append_42) $(am__append_45)
+
+### libunwind:
+libunwind_la_LIBADD = $(am__append_10) $(LIBUNWIND_ELF) -lc $(LIBCRTS) \
+	$(LIBLZMA)
+
+# List of arch-independent files needed by both local-only and generic
+# libraries:
+libunwind_la_SOURCES_common = \
+	$(libunwind_la_SOURCES_os)				\
+	mi/init.c mi/flush_cache.c mi/mempool.c mi/strerror.c
+
+
+# List of arch-independent files needed by generic library (libunwind-$ARCH):
+libunwind_la_SOURCES_generic = \
+	mi/Gdyn-extract.c mi/Gdyn-remote.c mi/Gfind_dynamic_proc_info.c	\
+	mi/Gget_accessors.c						\
+	mi/Gget_proc_info_by_ip.c mi/Gget_proc_name.c			\
+	mi/Gput_dynamic_unwind_info.c mi/Gdestroy_addr_space.c		\
+	mi/Gget_reg.c mi/Gset_reg.c					\
+	mi/Gget_fpreg.c mi/Gset_fpreg.c					\
+	mi/Gset_caching_policy.c					\
+	mi/Gset_cache_size.c
+
+@SUPPORT_CXX_EXCEPTIONS_TRUE@libunwind_la_SOURCES_local_unwind = \
+@SUPPORT_CXX_EXCEPTIONS_TRUE@	unwind/Backtrace.c unwind/DeleteException.c			\
+@SUPPORT_CXX_EXCEPTIONS_TRUE@	unwind/FindEnclosingFunction.c unwind/ForcedUnwind.c		\
+@SUPPORT_CXX_EXCEPTIONS_TRUE@	unwind/GetBSP.c unwind/GetCFA.c unwind/GetDataRelBase.c		\
+@SUPPORT_CXX_EXCEPTIONS_TRUE@	unwind/GetGR.c unwind/GetIP.c unwind/GetLanguageSpecificData.c	\
+@SUPPORT_CXX_EXCEPTIONS_TRUE@	unwind/GetRegionStart.c unwind/GetTextRelBase.c			\
+@SUPPORT_CXX_EXCEPTIONS_TRUE@	unwind/RaiseException.c unwind/Resume.c				\
+@SUPPORT_CXX_EXCEPTIONS_TRUE@	unwind/Resume_or_Rethrow.c unwind/SetGR.c unwind/SetIP.c	\
+@SUPPORT_CXX_EXCEPTIONS_TRUE@	unwind/GetIPInfo.c
+
+
+#  _ReadULEB()/_ReadSLEB() are needed for Intel C++ 8.0 compatibility
+@SUPPORT_CXX_EXCEPTIONS_TRUE@libunwind_la_SOURCES_os_linux_local = mi/_ReadULEB.c mi/_ReadSLEB.c
+
+# List of arch-independent files needed by local-only library (libunwind):
+libunwind_la_SOURCES_local_nounwind = \
+	$(libunwind_la_SOURCES_os_local)				\
+	mi/backtrace.c							\
+	mi/dyn-cancel.c mi/dyn-info-list.c mi/dyn-register.c		\
+	mi/Ldyn-extract.c mi/Lfind_dynamic_proc_info.c			\
+	mi/Lget_accessors.c						\
+	mi/Lget_proc_info_by_ip.c mi/Lget_proc_name.c			\
+	mi/Lput_dynamic_unwind_info.c mi/Ldestroy_addr_space.c		\
+	mi/Lget_reg.c   mi/Lset_reg.c					\
+	mi/Lget_fpreg.c mi/Lset_fpreg.c					\
+	mi/Lset_caching_policy.c					\
+	mi/Lset_cache_size.c
+
+libunwind_la_SOURCES_local = \
+	$(libunwind_la_SOURCES_local_nounwind)				\
+	$(libunwind_la_SOURCES_local_unwind)
+
+libunwind_la_SOURCES_os_linux = os-linux.c
+libunwind_la_SOURCES_os_hpux = os-hpux.c
+libunwind_la_SOURCES_os_freebsd = os-freebsd.c
+libunwind_la_SOURCES_os_qnx = os-qnx.c
+libunwind_dwarf_common_la_SOURCES = dwarf/global.c
+libunwind_dwarf_local_la_SOURCES = \
+	dwarf/Lexpr.c dwarf/Lfde.c dwarf/Lparser.c dwarf/Lpe.c \
+	dwarf/Lfind_proc_info-lsb.c \
+	dwarf/Lfind_unwind_table.c
+
+libunwind_dwarf_local_la_LIBADD = libunwind-dwarf-common.la
+libunwind_dwarf_generic_la_SOURCES = \
+	dwarf/Gexpr.c dwarf/Gfde.c dwarf/Gparser.c dwarf/Gpe.c \
+	dwarf/Gfind_proc_info-lsb.c \
+	dwarf/Gfind_unwind_table.c
+
+libunwind_dwarf_generic_la_LIBADD = libunwind-dwarf-common.la
+libunwind_elf32_la_SOURCES = elf32.c
+libunwind_elf64_la_SOURCES = elf64.c
+libunwind_elfxx_la_SOURCES = elfxx.c
+libunwind_elf32_la_LIBADD = $(LIBLZMA)
+libunwind_elf64_la_LIBADD = $(LIBLZMA)
+libunwind_elfxx_la_LIBADD = $(LIBLZMA)
+libunwind_la_SOURCES_aarch64_common = $(libunwind_la_SOURCES_common)	    \
+	aarch64/is_fpreg.c aarch64/regname.c
+
+
+# The list of files that go into libunwind:
+libunwind_la_SOURCES_aarch64 = $(libunwind_la_SOURCES_aarch64_common)	    \
+	$(libunwind_la_SOURCES_local)					    \
+	aarch64/Lapply_reg_state.c aarch64/Lreg_states_iterate.c	    \
+	aarch64/Lcreate_addr_space.c aarch64/Lget_proc_info.c 		    \
+	aarch64/Lget_save_loc.c aarch64/Lglobal.c aarch64/Linit.c	    \
+	aarch64/Linit_local.c aarch64/Linit_remote.c 			    \
+	aarch64/Lis_signal_frame.c aarch64/Lregs.c aarch64/Lresume.c 	    \
+	aarch64/Lstash_frame.c aarch64/Lstep.c aarch64/Ltrace.c		    \
+	aarch64/getcontext.S
+
+libunwind_aarch64_la_SOURCES_aarch64 = $(libunwind_la_SOURCES_aarch64_common) \
+	$(libunwind_la_SOURCES_generic)					      \
+	aarch64/Gapply_reg_state.c aarch64/Greg_states_iterate.c	      \
+	aarch64/Gcreate_addr_space.c aarch64/Gget_proc_info.c 		      \
+	aarch64/Gget_save_loc.c aarch64/Gglobal.c aarch64/Ginit.c 	      \
+	aarch64/Ginit_local.c aarch64/Ginit_remote.c			      \
+	aarch64/Gis_signal_frame.c aarch64/Gregs.c aarch64/Gresume.c	      \
+	aarch64/Gstash_frame.c aarch64/Gstep.c aarch64/Gtrace.c
+
+libunwind_la_SOURCES_arm_common = $(libunwind_la_SOURCES_common)	    \
+	arm/is_fpreg.c arm/regname.c
+
+
+# The list of files that go into libunwind:
+libunwind_la_SOURCES_arm = $(libunwind_la_SOURCES_arm_common)		    \
+	$(libunwind_la_SOURCES_arm_os_local)				    \
+	$(libunwind_la_SOURCES_local)					    \
+	arm/getcontext.S						    \
+	arm/Lapply_reg_state.c arm/Lreg_states_iterate.c		    \
+	arm/Lcreate_addr_space.c arm/Lget_proc_info.c arm/Lget_save_loc.c   \
+	arm/Lglobal.c arm/Linit.c arm/Linit_local.c arm/Linit_remote.c	    \
+	arm/Lregs.c arm/Lresume.c arm/Lstep.c				    \
+	arm/Lex_tables.c arm/Lstash_frame.c arm/Ltrace.c
+
+
+# The list of files that go into libunwind-arm:
+libunwind_arm_la_SOURCES_arm = $(libunwind_la_SOURCES_arm_common)	    \
+	$(libunwind_la_SOURCES_arm_os)					    \
+	$(libunwind_la_SOURCES_generic)					    \
+	arm/Gapply_reg_state.c arm/Greg_states_iterate.c		    \
+	arm/Gcreate_addr_space.c arm/Gget_proc_info.c arm/Gget_save_loc.c   \
+	arm/Gglobal.c arm/Ginit.c arm/Ginit_local.c arm/Ginit_remote.c	    \
+	arm/Gregs.c arm/Gresume.c arm/Gstep.c				    \
+	arm/Gex_tables.c arm/Gstash_frame.c arm/Gtrace.c
+
+libunwind_la_SOURCES_ia64_common = $(libunwind_la_SOURCES_common)	    \
+	ia64/regname.c
+
+
+# The list of files that go into libunwind:
+libunwind_la_SOURCES_ia64 = $(libunwind_la_SOURCES_ia64_common)		     \
+	$(libunwind_la_SOURCES_local)					     \
+									     \
+	ia64/dyn_info_list.S ia64/getcontext.S				     \
+									     \
+	ia64/Lapply_reg_state.c ia64/Lreg_states_iterate.c		     \
+	ia64/Lcreate_addr_space.c ia64/Lget_proc_info.c ia64/Lget_save_loc.c \
+	ia64/Lglobal.c ia64/Linit.c ia64/Linit_local.c ia64/Linit_remote.c   \
+	ia64/Linstall_cursor.S ia64/Lis_signal_frame.c ia64/Lparser.c	     \
+	ia64/Lrbs.c ia64/Lregs.c ia64/Lresume.c ia64/Lscript.c ia64/Lstep.c  \
+	ia64/Ltables.c ia64/Lfind_unwind_table.c
+
+
+# The list of files that go into libunwind-ia64:
+libunwind_ia64_la_SOURCES_ia64 = $(libunwind_la_SOURCES_ia64_common)	     \
+	$(libunwind_la_SOURCES_generic)					     \
+	ia64/Gapply_reg_state.c ia64/Greg_states_iterate.c		     \
+	ia64/Gcreate_addr_space.c ia64/Gget_proc_info.c ia64/Gget_save_loc.c \
+	ia64/Gglobal.c ia64/Ginit.c ia64/Ginit_local.c ia64/Ginit_remote.c   \
+	ia64/Ginstall_cursor.S ia64/Gis_signal_frame.c ia64/Gparser.c	     \
+	ia64/Grbs.c ia64/Gregs.c ia64/Gresume.c ia64/Gscript.c ia64/Gstep.c  \
+	ia64/Gtables.c ia64/Gfind_unwind_table.c
+
+libunwind_la_SOURCES_hppa_common = $(libunwind_la_SOURCES_common)	\
+	hppa/regname.c
+
+
+# The list of files that go into libunwind:
+libunwind_la_SOURCES_hppa = $(libunwind_la_SOURCES_hppa_common)		\
+	$(libunwind_la_SOURCES_local)					\
+	hppa/getcontext.S hppa/setcontext.S				\
+	hppa/Lapply_reg_state.c hppa/Lreg_states_iterate.c		\
+	hppa/Lcreate_addr_space.c hppa/Lget_save_loc.c hppa/Lglobal.c	\
+	hppa/Linit.c hppa/Linit_local.c hppa/Linit_remote.c		\
+	hppa/Lis_signal_frame.c hppa/Lget_proc_info.c hppa/Lregs.c	\
+	hppa/Lresume.c hppa/Lstep.c
+
+
+# The list of files that go into libunwind-hppa:
+libunwind_hppa_la_SOURCES_hppa = $(libunwind_la_SOURCES_hppa_common)	\
+	$(libunwind_la_SOURCES_generic)					\
+	hppa/Gapply_reg_state.c hppa/Greg_states_iterate.c		\
+	hppa/Gcreate_addr_space.c hppa/Gget_save_loc.c hppa/Gglobal.c	\
+	hppa/Ginit.c hppa/Ginit_local.c hppa/Ginit_remote.c		\
+	hppa/Gis_signal_frame.c hppa/Gget_proc_info.c hppa/Gregs.c	\
+	hppa/Gresume.c hppa/Gstep.c
+
+libunwind_la_SOURCES_mips_common = $(libunwind_la_SOURCES_common)	    \
+	mips/is_fpreg.c mips/regname.c
+
+
+# The list of files that go into libunwind:
+libunwind_la_SOURCES_mips = $(libunwind_la_SOURCES_mips_common)		    \
+	$(libunwind_la_SOURCES_local)					    \
+	mips/getcontext.S						    \
+	mips/Lapply_reg_state.c mips/Lreg_states_iterate.c		    \
+	mips/Lcreate_addr_space.c mips/Lget_proc_info.c mips/Lget_save_loc.c   \
+	mips/Lglobal.c mips/Linit.c mips/Linit_local.c mips/Linit_remote.c  \
+	mips/Lis_signal_frame.c mips/Lregs.c mips/Lresume.c mips/Lstep.c
+
+libunwind_mips_la_SOURCES_mips = $(libunwind_la_SOURCES_mips_common)	    \
+	$(libunwind_la_SOURCES_generic)					    \
+	mips/Gapply_reg_state.c mips/Greg_states_iterate.c		    \
+	mips/Gcreate_addr_space.c mips/Gget_proc_info.c mips/Gget_save_loc.c   \
+	mips/Gglobal.c mips/Ginit.c mips/Ginit_local.c mips/Ginit_remote.c	    \
+	mips/Gis_signal_frame.c mips/Gregs.c mips/Gresume.c mips/Gstep.c
+
+libunwind_la_SOURCES_tilegx_common = $(libunwind_la_SOURCES_common)	    \
+	tilegx/is_fpreg.c tilegx/regname.c
+
+
+# The list of files that go into libunwind:
+libunwind_la_SOURCES_tilegx = $(libunwind_la_SOURCES_tilegx_common)		    \
+	$(libunwind_la_SOURCES_local)					    \
+	tilegx/getcontext.S						\
+	tilegx/Lapply_reg_state.c tilegx/Lreg_states_iterate.c		    \
+	tilegx/Lcreate_addr_space.c tilegx/Lget_proc_info.c tilegx/Lget_save_loc.c   \
+	tilegx/Lglobal.c tilegx/Linit.c tilegx/Linit_local.c tilegx/Linit_remote.c  \
+	tilegx/Lis_signal_frame.c tilegx/Lregs.c tilegx/Lresume.c tilegx/Lstep.c
+
+libunwind_tilegx_la_SOURCES_tilegx = $(libunwind_la_SOURCES_tilegx_common)	    \
+	$(libunwind_la_SOURCES_generic)					    \
+	tilegx/Gapply_reg_state.c tilegx/Greg_states_iterate.c			     \
+	tilegx/Gcreate_addr_space.c tilegx/Gget_proc_info.c tilegx/Gget_save_loc.c   \
+	tilegx/Gglobal.c tilegx/Ginit.c tilegx/Ginit_local.c tilegx/Ginit_remote.c	    \
+	tilegx/Gis_signal_frame.c tilegx/Gregs.c tilegx/Gresume.c tilegx/Gstep.c
+
+libunwind_la_SOURCES_x86_common = $(libunwind_la_SOURCES_common)	\
+	x86/is_fpreg.c x86/regname.c
+
+
+# The list of files that go into libunwind:
+libunwind_la_SOURCES_x86 = $(libunwind_la_SOURCES_x86_common)		\
+        $(libunwind_la_SOURCES_x86_os_local)				\
+	$(libunwind_la_SOURCES_local)					\
+	x86/Lapply_reg_state.c x86/Lreg_states_iterate.c		\
+	x86/Lcreate_addr_space.c x86/Lget_save_loc.c x86/Lglobal.c	\
+	x86/Linit.c x86/Linit_local.c x86/Linit_remote.c		\
+	x86/Lget_proc_info.c x86/Lregs.c				\
+	x86/Lresume.c x86/Lstep.c
+
+
+# The list of files that go into libunwind-x86:
+libunwind_x86_la_SOURCES_x86 = $(libunwind_la_SOURCES_x86_common)	\
+        $(libunwind_la_SOURCES_x86_os)					\
+	$(libunwind_la_SOURCES_generic)					\
+	x86/Gapply_reg_state.c x86/Greg_states_iterate.c		\
+	x86/Gcreate_addr_space.c x86/Gget_save_loc.c x86/Gglobal.c	\
+	x86/Ginit.c x86/Ginit_local.c x86/Ginit_remote.c		\
+	x86/Gget_proc_info.c x86/Gregs.c				\
+	x86/Gresume.c x86/Gstep.c
+
+libunwind_la_SOURCES_x86_64_common = $(libunwind_la_SOURCES_common)	\
+	x86_64/is_fpreg.c x86_64/regname.c
+
+
+# The list of files that go into libunwind:
+libunwind_la_SOURCES_x86_64 = $(libunwind_la_SOURCES_x86_64_common)	    \
+        $(libunwind_la_SOURCES_x86_64_os_local)			    	    \
+	$(libunwind_la_SOURCES_local)					    \
+	x86_64/setcontext.S						    \
+	x86_64/Lapply_reg_state.c x86_64/Lreg_states_iterate.c		    \
+	x86_64/Lcreate_addr_space.c x86_64/Lget_save_loc.c x86_64/Lglobal.c \
+	x86_64/Linit.c x86_64/Linit_local.c x86_64/Linit_remote.c	    \
+	x86_64/Lget_proc_info.c x86_64/Lregs.c x86_64/Lresume.c		    \
+	x86_64/Lstash_frame.c x86_64/Lstep.c x86_64/Ltrace.c x86_64/getcontext.S
+
+
+# The list of files that go into libunwind-x86_64:
+libunwind_x86_64_la_SOURCES_x86_64 = $(libunwind_la_SOURCES_x86_64_common)  \
+        $(libunwind_la_SOURCES_x86_64_os)			    	    \
+	$(libunwind_la_SOURCES_generic)					    \
+	x86_64/Gapply_reg_state.c x86_64/Greg_states_iterate.c		    \
+	x86_64/Gcreate_addr_space.c x86_64/Gget_save_loc.c x86_64/Gglobal.c \
+	x86_64/Ginit.c x86_64/Ginit_local.c x86_64/Ginit_remote.c	    \
+	x86_64/Gget_proc_info.c x86_64/Gregs.c x86_64/Gresume.c		    \
+	x86_64/Gstash_frame.c x86_64/Gstep.c x86_64/Gtrace.c
+
+
+# The list of local files that go to Power 64 and 32:
+libunwind_la_SOURCES_ppc = \
+	ppc/Lget_proc_info.c ppc/Lget_save_loc.c ppc/Linit_local.c	\
+	ppc/Linit_remote.c ppc/Lis_signal_frame.c
+
+
+# The list of generic files that go to Power 64 and 32:
+libunwind_ppc_la_SOURCES_ppc_generic = \
+	ppc/Gget_proc_info.c ppc/Gget_save_loc.c ppc/Ginit_local.c	\
+	ppc/Ginit_remote.c ppc/Gis_signal_frame.c
+
+libunwind_la_SOURCES_ppc32_common = $(libunwind_la_SOURCES_common)      \
+	ppc32/is_fpreg.c ppc32/regname.c ppc32/get_func_addr.c
+
+
+# The list of files that go into libunwind:
+libunwind_la_SOURCES_ppc32 = $(libunwind_la_SOURCES_ppc32_common)       \
+	$(libunwind_la_SOURCES_local)                                   \
+	$(libunwind_la_SOURCES_ppc)					\
+	ppc32/Lapply_reg_state.c ppc32/Lreg_states_iterate.c		\
+	ppc32/Lcreate_addr_space.c					\
+	ppc32/Lglobal.c ppc32/Linit.c					\
+	ppc32/Lregs.c ppc32/Lresume.c ppc32/Lstep.c
+
+
+# The list of files that go into libunwind-ppc32:
+libunwind_ppc32_la_SOURCES_ppc32 = $(libunwind_la_SOURCES_ppc32_common) \
+	$(libunwind_la_SOURCES_generic)                                 \
+	$(libunwind_ppc_la_SOURCES_ppc_generic)				\
+	ppc32/Gapply_reg_state.c ppc32/Greg_states_iterate.c		\
+	ppc32/Gcreate_addr_space.c					\
+	ppc32/Gglobal.c ppc32/Ginit.c					\
+	ppc32/Gregs.c ppc32/Gresume.c ppc32/Gstep.c
+
+libunwind_la_SOURCES_ppc64_common = $(libunwind_la_SOURCES_common)      \
+        ppc64/is_fpreg.c ppc64/regname.c ppc64/get_func_addr.c
+
+
+# The list of files that go into libunwind:
+libunwind_la_SOURCES_ppc64 = $(libunwind_la_SOURCES_ppc64_common)       \
+        $(libunwind_la_SOURCES_local)                                   \
+	$(libunwind_la_SOURCES_ppc)					\
+	ppc64/Lapply_reg_state.c ppc64/Lreg_states_iterate.c		\
+	ppc64/Lcreate_addr_space.c					\
+	ppc64/Lglobal.c ppc64/Linit.c					\
+	ppc64/Lregs.c ppc64/Lresume.c ppc64/Lstep.c
+
+
+# The list of files that go into libunwind-ppc64:
+libunwind_ppc64_la_SOURCES_ppc64 = $(libunwind_la_SOURCES_ppc64_common) \
+        $(libunwind_la_SOURCES_generic)                                 \
+	$(libunwind_ppc_la_SOURCES_ppc_generic)				\
+	ppc64/Gapply_reg_state.c ppc64/Greg_states_iterate.c		\
+	ppc64/Gcreate_addr_space.c					\
+	ppc64/Gglobal.c ppc64/Ginit.c					\
+	ppc64/Gregs.c ppc64/Gresume.c ppc64/Gstep.c
+
+libunwind_la_SOURCES_sh_common = $(libunwind_la_SOURCES_common)		\
+	sh/is_fpreg.c sh/regname.c
+
+
+# The list of files that go into libunwind:
+libunwind_la_SOURCES_sh = $(libunwind_la_SOURCES_sh_common)		\
+	$(libunwind_la_SOURCES_local)					\
+	sh/Lapply_reg_state.c sh/Lreg_states_iterate.c			\
+	sh/Lcreate_addr_space.c sh/Lget_proc_info.c sh/Lget_save_loc.c	\
+	sh/Lglobal.c sh/Linit.c sh/Linit_local.c sh/Linit_remote.c	\
+	sh/Lis_signal_frame.c sh/Lregs.c sh/Lresume.c sh/Lstep.c
+
+libunwind_sh_la_SOURCES_sh = $(libunwind_la_SOURCES_sh_common)		\
+	$(libunwind_la_SOURCES_generic)					\
+	sh/Gapply_reg_state.c sh/Greg_states_iterate.c			\
+	sh/Gcreate_addr_space.c sh/Gget_proc_info.c sh/Gget_save_loc.c	\
+	sh/Gglobal.c sh/Ginit.c sh/Ginit_local.c sh/Ginit_remote.c	\
+	sh/Gis_signal_frame.c sh/Gregs.c sh/Gresume.c sh/Gstep.c
+
+libunwind_la_SOURCES_s390x_common = $(libunwind_la_SOURCES_common)	\
+	s390x/is_fpreg.c s390x/regname.c
+
+
+# The list of files that go into libunwind:
+libunwind_la_SOURCES_s390x = $(libunwind_la_SOURCES_s390x_common)	    \
+	$(libunwind_la_SOURCES_local)					    \
+	s390x/Lapply_reg_state.c s390x/Lreg_states_iterate.c		    \
+	s390x/Lcreate_addr_space.c s390x/Lget_save_loc.c s390x/Lglobal.c    \
+	s390x/Linit.c s390x/Linit_local.c s390x/Linit_remote.c	            \
+	s390x/Lget_proc_info.c s390x/Lregs.c s390x/Lresume.c		    \
+	s390x/Lis_signal_frame.c s390x/Lstep.c				    \
+	s390x/getcontext.S s390x/setcontext.S
+
+
+# The list of files that go into libunwind-s390x:
+libunwind_s390x_la_SOURCES_s390x = $(libunwind_la_SOURCES_s390x_common)     \
+	$(libunwind_la_SOURCES_generic)					    \
+	s390x/Gapply_reg_state.c s390x/Greg_states_iterate.c	            \
+	s390x/Gcreate_addr_space.c s390x/Gget_save_loc.c s390x/Gglobal.c    \
+	s390x/Ginit.c s390x/Ginit_local.c s390x/Ginit_remote.c	            \
+	s390x/Gget_proc_info.c s390x/Gregs.c s390x/Gresume.c		    \
+	s390x/Gis_signal_frame.c s390x/Gstep.c
+
+@OS_FREEBSD_TRUE@libunwind_la_SOURCES_os = $(libunwind_la_SOURCES_os_freebsd)
+@OS_HPUX_TRUE@libunwind_la_SOURCES_os = $(libunwind_la_SOURCES_os_hpux)
+@OS_LINUX_TRUE@libunwind_la_SOURCES_os = $(libunwind_la_SOURCES_os_linux)
+@OS_QNX_TRUE@libunwind_la_SOURCES_os = $(libunwind_la_SOURCES_os_qnx)
+@OS_FREEBSD_TRUE@libunwind_la_SOURCES_os_local = $(libunwind_la_SOURCES_os_freebsd_local)
+@OS_HPUX_TRUE@libunwind_la_SOURCES_os_local = $(libunwind_la_SOURCES_os_hpux_local)
+@OS_LINUX_TRUE@libunwind_la_SOURCES_os_local = $(libunwind_la_SOURCES_os_linux_local)
+@OS_QNX_TRUE@libunwind_la_SOURCES_os_local = $(libunwind_la_SOURCES_os_qnx_local)
+@OS_FREEBSD_TRUE@libunwind_la_SOURCES_x86_os = x86/Gos-freebsd.c
+@OS_LINUX_TRUE@libunwind_la_SOURCES_x86_os = x86/Gos-linux.c
+@OS_FREEBSD_TRUE@libunwind_x86_la_SOURCES_os = x86/getcontext-freebsd.S
+@OS_LINUX_TRUE@libunwind_x86_la_SOURCES_os = x86/getcontext-linux.S
+@OS_FREEBSD_TRUE@libunwind_la_SOURCES_x86_os_local = x86/Los-freebsd.c
+@OS_LINUX_TRUE@libunwind_la_SOURCES_x86_os_local = x86/Los-linux.c
+@OS_FREEBSD_TRUE@libunwind_la_SOURCES_x86_64_os = x86_64/Gos-freebsd.c
+@OS_LINUX_TRUE@libunwind_la_SOURCES_x86_64_os = x86_64/Gos-linux.c
+@OS_FREEBSD_TRUE@libunwind_la_SOURCES_x86_64_os_local = x86_64/Los-freebsd.c
+@OS_LINUX_TRUE@libunwind_la_SOURCES_x86_64_os_local = x86_64/Los-linux.c
+@OS_FREEBSD_TRUE@libunwind_la_SOURCES_arm_os = arm/Gos-freebsd.c
+@OS_LINUX_TRUE@libunwind_la_SOURCES_arm_os = arm/Gos-linux.c
+@OS_QNX_TRUE@libunwind_la_SOURCES_arm_os = arm/Gos-other.c
+@OS_FREEBSD_TRUE@libunwind_la_SOURCES_arm_os_local = arm/Los-freebsd.c
+@OS_LINUX_TRUE@libunwind_la_SOURCES_arm_os_local = arm/Los-linux.c
+@OS_QNX_TRUE@libunwind_la_SOURCES_arm_os_local = arm/Los-other.c
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_PPC32_FALSE@@ARCH_PPC64_FALSE@@ARCH_S390X_TRUE@@ARCH_SH_FALSE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_FALSE@@ARCH_X86_FALSE@libunwind_la_SOURCES = $(libunwind_la_SOURCES_s390x)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_PPC32_FALSE@@ARCH_PPC64_FALSE@@ARCH_SH_TRUE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_FALSE@@ARCH_X86_FALSE@libunwind_la_SOURCES = $(libunwind_la_SOURCES_sh)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_PPC32_FALSE@@ARCH_PPC64_TRUE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_FALSE@@ARCH_X86_FALSE@libunwind_la_SOURCES = $(libunwind_la_SOURCES_ppc64)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_PPC32_TRUE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_FALSE@@ARCH_X86_FALSE@libunwind_la_SOURCES = $(libunwind_la_SOURCES_ppc32)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_TRUE@@ARCH_X86_FALSE@libunwind_la_SOURCES = $(libunwind_la_SOURCES_x86_64)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_TILEGX_FALSE@@ARCH_X86_TRUE@libunwind_la_SOURCES = $(libunwind_la_SOURCES_x86) $(libunwind_x86_la_SOURCES_os)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_TILEGX_TRUE@libunwind_la_SOURCES = $(libunwind_la_SOURCES_tilegx)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_TRUE@libunwind_la_SOURCES = $(libunwind_la_SOURCES_mips)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_TRUE@@ARCH_IA64_FALSE@libunwind_la_SOURCES = $(libunwind_la_SOURCES_hppa)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_IA64_TRUE@libunwind_la_SOURCES = $(libunwind_la_SOURCES_ia64)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_TRUE@libunwind_la_SOURCES = $(libunwind_la_SOURCES_arm)
+@ARCH_AARCH64_TRUE@libunwind_la_SOURCES = $(libunwind_la_SOURCES_aarch64)
+@ARCH_AARCH64_TRUE@libunwind_aarch64_la_SOURCES = $(libunwind_aarch64_la_SOURCES_aarch64)
+@ARCH_AARCH64_TRUE@libunwind_aarch64_la_LDFLAGS = $(COMMON_SO_LDFLAGS) -version-info $(SOVERSION)
+@ARCH_AARCH64_TRUE@libunwind_aarch64_la_LIBADD =  \
+@ARCH_AARCH64_TRUE@	libunwind-dwarf-generic.la \
+@ARCH_AARCH64_TRUE@	libunwind-elf64.la $(am__append_14)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_TRUE@libunwind_arm_la_SOURCES = $(libunwind_arm_la_SOURCES_arm)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_TRUE@libunwind_arm_la_LDFLAGS = $(COMMON_SO_LDFLAGS) -version-info $(SOVERSION)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_TRUE@libunwind_arm_la_LIBADD =  \
+@ARCH_AARCH64_FALSE@@ARCH_ARM_TRUE@	libunwind-dwarf-generic.la \
+@ARCH_AARCH64_FALSE@@ARCH_ARM_TRUE@	libunwind-elf32.la \
+@ARCH_AARCH64_FALSE@@ARCH_ARM_TRUE@	$(am__append_17)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_IA64_TRUE@BUILT_SOURCES = Gcursor_i.h Lcursor_i.h
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_IA64_TRUE@libunwind_ia64_la_SOURCES = $(libunwind_ia64_la_SOURCES_ia64)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_IA64_TRUE@libunwind_ia64_la_LDFLAGS = $(COMMON_SO_LDFLAGS) -version-info $(SOVERSION)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_IA64_TRUE@libunwind_ia64_la_LIBADD = libunwind-elf64.la \
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_IA64_TRUE@	$(am__append_20)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_TRUE@@ARCH_IA64_FALSE@libunwind_hppa_la_SOURCES = $(libunwind_hppa_la_SOURCES_hppa)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_TRUE@@ARCH_IA64_FALSE@libunwind_hppa_la_LDFLAGS = $(COMMON_SO_LDFLAGS) -version-info $(SOVERSION)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_TRUE@@ARCH_IA64_FALSE@libunwind_hppa_la_LIBADD = libunwind-dwarf-generic.la \
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_TRUE@@ARCH_IA64_FALSE@	libunwind-elf32.la \
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_TRUE@@ARCH_IA64_FALSE@	$(am__append_23)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_TRUE@libunwind_mips_la_SOURCES = $(libunwind_mips_la_SOURCES_mips)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_TRUE@libunwind_mips_la_LDFLAGS = $(COMMON_SO_LDFLAGS) -version-info $(SOVERSION)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_TRUE@libunwind_mips_la_LIBADD = libunwind-dwarf-generic.la \
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_TRUE@	libunwind-elfxx.la \
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_TRUE@	$(am__append_26)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_TILEGX_TRUE@libunwind_tilegx_la_SOURCES = $(libunwind_tilegx_la_SOURCES_tilegx)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_TILEGX_TRUE@libunwind_tilegx_la_LDFLAGS = $(COMMON_SO_LDFLAGS) -version-info $(SOVERSION)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_TILEGX_TRUE@libunwind_tilegx_la_LIBADD = libunwind-dwarf-generic.la \
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_TILEGX_TRUE@	libunwind-elfxx.la \
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_TILEGX_TRUE@	$(am__append_29)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_TILEGX_FALSE@@ARCH_X86_TRUE@libunwind_x86_la_SOURCES = $(libunwind_x86_la_SOURCES_x86)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_TILEGX_FALSE@@ARCH_X86_TRUE@libunwind_x86_la_LDFLAGS = $(COMMON_SO_LDFLAGS) -version-info $(SOVERSION)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_TILEGX_FALSE@@ARCH_X86_TRUE@libunwind_x86_la_LIBADD = libunwind-dwarf-generic.la \
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_TILEGX_FALSE@@ARCH_X86_TRUE@	libunwind-elf32.la \
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_TILEGX_FALSE@@ARCH_X86_TRUE@	$(am__append_32)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_TRUE@@ARCH_X86_FALSE@libunwind_x86_64_la_SOURCES = $(libunwind_x86_64_la_SOURCES_x86_64)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_TRUE@@ARCH_X86_FALSE@libunwind_x86_64_la_LDFLAGS = $(COMMON_SO_LDFLAGS) -version-info $(SOVERSION)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_TRUE@@ARCH_X86_FALSE@libunwind_x86_64_la_LIBADD = libunwind-dwarf-generic.la \
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_TRUE@@ARCH_X86_FALSE@	libunwind-elf64.la \
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_TRUE@@ARCH_X86_FALSE@	$(am__append_35)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_PPC32_TRUE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_FALSE@@ARCH_X86_FALSE@libunwind_ppc32_la_SOURCES = $(libunwind_ppc32_la_SOURCES_ppc32)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_PPC32_TRUE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_FALSE@@ARCH_X86_FALSE@libunwind_ppc32_la_LDFLAGS = $(COMMON_SO_LDFLAGS) -version-info $(SOVERSION)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_PPC32_TRUE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_FALSE@@ARCH_X86_FALSE@libunwind_ppc32_la_LIBADD = libunwind-dwarf-generic.la \
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_PPC32_TRUE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_FALSE@@ARCH_X86_FALSE@	libunwind-elf32.la \
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_PPC32_TRUE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_FALSE@@ARCH_X86_FALSE@	$(am__append_38)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_PPC32_FALSE@@ARCH_PPC64_TRUE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_FALSE@@ARCH_X86_FALSE@libunwind_ppc64_la_SOURCES = $(libunwind_ppc64_la_SOURCES_ppc64)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_PPC32_FALSE@@ARCH_PPC64_TRUE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_FALSE@@ARCH_X86_FALSE@libunwind_ppc64_la_LDFLAGS = $(COMMON_SO_LDFLAGS) -version-info $(SOVERSION)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_PPC32_FALSE@@ARCH_PPC64_TRUE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_FALSE@@ARCH_X86_FALSE@libunwind_ppc64_la_LIBADD = libunwind-dwarf-generic.la \
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_PPC32_FALSE@@ARCH_PPC64_TRUE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_FALSE@@ARCH_X86_FALSE@	libunwind-elf64.la \
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_PPC32_FALSE@@ARCH_PPC64_TRUE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_FALSE@@ARCH_X86_FALSE@	$(am__append_41)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_PPC32_FALSE@@ARCH_PPC64_FALSE@@ARCH_SH_TRUE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_FALSE@@ARCH_X86_FALSE@libunwind_sh_la_SOURCES = $(libunwind_sh_la_SOURCES_sh)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_PPC32_FALSE@@ARCH_PPC64_FALSE@@ARCH_SH_TRUE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_FALSE@@ARCH_X86_FALSE@libunwind_sh_la_LDFLAGS = $(COMMON_SO_LDFLAGS) -version-info $(SOVERSION)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_PPC32_FALSE@@ARCH_PPC64_FALSE@@ARCH_SH_TRUE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_FALSE@@ARCH_X86_FALSE@libunwind_sh_la_LIBADD = libunwind-dwarf-generic.la \
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_PPC32_FALSE@@ARCH_PPC64_FALSE@@ARCH_SH_TRUE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_FALSE@@ARCH_X86_FALSE@	libunwind-elf32.la \
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_PPC32_FALSE@@ARCH_PPC64_FALSE@@ARCH_SH_TRUE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_FALSE@@ARCH_X86_FALSE@	$(am__append_44)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_PPC32_FALSE@@ARCH_PPC64_FALSE@@ARCH_S390X_TRUE@@ARCH_SH_FALSE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_FALSE@@ARCH_X86_FALSE@libunwind_s390x_la_SOURCES = $(libunwind_s390x_la_SOURCES_s390x)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_PPC32_FALSE@@ARCH_PPC64_FALSE@@ARCH_S390X_TRUE@@ARCH_SH_FALSE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_FALSE@@ARCH_X86_FALSE@libunwind_s390x_la_LDFLAGS = $(COMMON_SO_LDFLAGS) -version-info $(SOVERSION)
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_PPC32_FALSE@@ARCH_PPC64_FALSE@@ARCH_S390X_TRUE@@ARCH_SH_FALSE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_FALSE@@ARCH_X86_FALSE@libunwind_s390x_la_LIBADD = libunwind-dwarf-generic.la \
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_PPC32_FALSE@@ARCH_PPC64_FALSE@@ARCH_S390X_TRUE@@ARCH_SH_FALSE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_FALSE@@ARCH_X86_FALSE@	libunwind-elf64.la \
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_HPPA_FALSE@@ARCH_IA64_FALSE@@ARCH_MIPS_FALSE@@ARCH_PPC32_FALSE@@ARCH_PPC64_FALSE@@ARCH_S390X_TRUE@@ARCH_SH_FALSE@@ARCH_TILEGX_FALSE@@ARCH_X86_64_FALSE@@ARCH_X86_FALSE@	$(am__append_47)
+
+#
+# Don't link with standard libraries, because those may mention
+# libunwind already.
+#
+libunwind_la_LDFLAGS = $(COMMON_SO_LDFLAGS) -XCClinker -nostdlib \
+			$(LDFLAGS_STATIC_LIBCXA) -version-info $(SOVERSION)
+
+AM_CPPFLAGS = -I$(top_srcdir)/include -I$(top_srcdir)/include/tdep-$(arch) -I.
+AM_CCASFLAGS = $(AM_CPPFLAGS)
+EXTRA_DIST = $(libunwind_la_SOURCES_aarch64)			\
+		$(libunwind_la_SOURCES_arm)			\
+		$(libunwind_la_SOURCES_hppa)			\
+		$(libunwind_la_SOURCES_ia64)			\
+		$(libunwind_la_SOURCES_mips)			\
+		$(libunwind_la_SOURCES_sh)			\
+		$(libunwind_la_SOURCES_x86)			\
+		$(libunwind_la_SOURCES_os_freebsd)		\
+		$(libunwind_la_SOURCES_os_linux)		\
+		$(libunwind_la_SOURCES_os_hpux)			\
+		$(libunwind_la_SOURCES_os_qnx)			\
+		$(libunwind_la_SOURCES_common)			\
+		$(libunwind_la_SOURCES_local)			\
+		$(libunwind_la_SOURCES_generic)			\
+		$(libunwind_aarch64_la_SOURCES_aarch64)		\
+		$(libunwind_arm_la_SOURCES_arm)			\
+		$(libunwind_hppa_la_SOURCES_hppa)		\
+		$(libunwind_ia64_la_SOURCES_ia64)		\
+		$(libunwind_mips_la_SOURCES_mips)		\
+		$(libunwind_sh_la_SOURCES_sh)			\
+		$(libunwind_x86_la_SOURCES_x86)			\
+		$(libunwind_x86_64_la_SOURCES_x86_64)
+
+MAINTAINERCLEANFILES = Makefile.in
+all: $(BUILT_SOURCES)
+	$(MAKE) $(AM_MAKEFLAGS) all-am
+
+.SUFFIXES:
+.SUFFIXES: .S .c .lo .o .obj
+$(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ $(srcdir)/Makefile.am  $(am__configure_deps)
+	@for dep in $?; do \
+	  case '$(am__configure_deps)' in \
+	    *$$dep*) \
+	      ( cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh ) \
+	        && { if test -f $@; then exit 0; else break; fi; }; \
+	      exit 1;; \
+	  esac; \
+	done; \
+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --gnu src/Makefile'; \
+	$(am__cd) $(top_srcdir) && \
+	  $(AUTOMAKE) --gnu src/Makefile
+Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
+	@case '$?' in \
+	  *config.status*) \
+	    cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh;; \
+	  *) \
+	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe)'; \
+	    cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe);; \
+	esac;
+
+$(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+
+$(top_srcdir)/configure: @MAINTAINER_MODE_TRUE@ $(am__configure_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(ACLOCAL_M4): @MAINTAINER_MODE_TRUE@ $(am__aclocal_m4_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(am__aclocal_m4_deps):
+libunwind-generic.pc: $(top_builddir)/config.status $(srcdir)/libunwind-generic.pc.in
+	cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@
+install-libLIBRARIES: $(lib_LIBRARIES)
+	@$(NORMAL_INSTALL)
+	@list='$(lib_LIBRARIES)'; test -n "$(libdir)" || list=; \
+	list2=; for p in $$list; do \
+	  if test -f $$p; then \
+	    list2="$$list2 $$p"; \
+	  else :; fi; \
+	done; \
+	test -z "$$list2" || { \
+	  echo " $(MKDIR_P) '$(DESTDIR)$(libdir)'"; \
+	  $(MKDIR_P) "$(DESTDIR)$(libdir)" || exit 1; \
+	  echo " $(INSTALL_DATA) $$list2 '$(DESTDIR)$(libdir)'"; \
+	  $(INSTALL_DATA) $$list2 "$(DESTDIR)$(libdir)" || exit $$?; }
+	@$(POST_INSTALL)
+	@list='$(lib_LIBRARIES)'; test -n "$(libdir)" || list=; \
+	for p in $$list; do \
+	  if test -f $$p; then \
+	    $(am__strip_dir) \
+	    echo " ( cd '$(DESTDIR)$(libdir)' && $(RANLIB) $$f )"; \
+	    ( cd "$(DESTDIR)$(libdir)" && $(RANLIB) $$f ) || exit $$?; \
+	  else :; fi; \
+	done
+
+uninstall-libLIBRARIES:
+	@$(NORMAL_UNINSTALL)
+	@list='$(lib_LIBRARIES)'; test -n "$(libdir)" || list=; \
+	files=`for p in $$list; do echo $$p; done | sed -e 's|^.*/||'`; \
+	dir='$(DESTDIR)$(libdir)'; $(am__uninstall_files_from_dir)
+
+clean-libLIBRARIES:
+	-test -z "$(lib_LIBRARIES)" || rm -f $(lib_LIBRARIES)
+
+install-libLTLIBRARIES: $(lib_LTLIBRARIES)
+	@$(NORMAL_INSTALL)
+	@list='$(lib_LTLIBRARIES)'; test -n "$(libdir)" || list=; \
+	list2=; for p in $$list; do \
+	  if test -f $$p; then \
+	    list2="$$list2 $$p"; \
+	  else :; fi; \
+	done; \
+	test -z "$$list2" || { \
+	  echo " $(MKDIR_P) '$(DESTDIR)$(libdir)'"; \
+	  $(MKDIR_P) "$(DESTDIR)$(libdir)" || exit 1; \
+	  echo " $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL) $(INSTALL_STRIP_FLAG) $$list2 '$(DESTDIR)$(libdir)'"; \
+	  $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL) $(INSTALL_STRIP_FLAG) $$list2 "$(DESTDIR)$(libdir)"; \
+	}
+
+uninstall-libLTLIBRARIES:
+	@$(NORMAL_UNINSTALL)
+	@list='$(lib_LTLIBRARIES)'; test -n "$(libdir)" || list=; \
+	for p in $$list; do \
+	  $(am__strip_dir) \
+	  echo " $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=uninstall rm -f '$(DESTDIR)$(libdir)/$$f'"; \
+	  $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=uninstall rm -f "$(DESTDIR)$(libdir)/$$f"; \
+	done
+
+clean-libLTLIBRARIES:
+	-test -z "$(lib_LTLIBRARIES)" || rm -f $(lib_LTLIBRARIES)
+	@list='$(lib_LTLIBRARIES)'; \
+	locs=`for p in $$list; do echo $$p; done | \
+	      sed 's|^[^/]*$$|.|; s|/[^/]*$$||; s|$$|/so_locations|' | \
+	      sort -u`; \
+	test -z "$$locs" || { \
+	  echo rm -f $${locs}; \
+	  rm -f $${locs}; \
+	}
+
+clean-noinstLTLIBRARIES:
+	-test -z "$(noinst_LTLIBRARIES)" || rm -f $(noinst_LTLIBRARIES)
+	@list='$(noinst_LTLIBRARIES)'; \
+	locs=`for p in $$list; do echo $$p; done | \
+	      sed 's|^[^/]*$$|.|; s|/[^/]*$$||; s|$$|/so_locations|' | \
+	      sort -u`; \
+	test -z "$$locs" || { \
+	  echo rm -f $${locs}; \
+	  rm -f $${locs}; \
+	}
+mi/$(am__dirstamp):
+	@$(MKDIR_P) mi
+	@: > mi/$(am__dirstamp)
+mi/$(DEPDIR)/$(am__dirstamp):
+	@$(MKDIR_P) mi/$(DEPDIR)
+	@: > mi/$(DEPDIR)/$(am__dirstamp)
+mi/init.lo: mi/$(am__dirstamp) mi/$(DEPDIR)/$(am__dirstamp)
+mi/flush_cache.lo: mi/$(am__dirstamp) mi/$(DEPDIR)/$(am__dirstamp)
+mi/mempool.lo: mi/$(am__dirstamp) mi/$(DEPDIR)/$(am__dirstamp)
+mi/strerror.lo: mi/$(am__dirstamp) mi/$(DEPDIR)/$(am__dirstamp)
+aarch64/$(am__dirstamp):
+	@$(MKDIR_P) aarch64
+	@: > aarch64/$(am__dirstamp)
+aarch64/$(DEPDIR)/$(am__dirstamp):
+	@$(MKDIR_P) aarch64/$(DEPDIR)
+	@: > aarch64/$(DEPDIR)/$(am__dirstamp)
+aarch64/is_fpreg.lo: aarch64/$(am__dirstamp) \
+	aarch64/$(DEPDIR)/$(am__dirstamp)
+aarch64/regname.lo: aarch64/$(am__dirstamp) \
+	aarch64/$(DEPDIR)/$(am__dirstamp)
+mi/Gdyn-extract.lo: mi/$(am__dirstamp) mi/$(DEPDIR)/$(am__dirstamp)
+mi/Gdyn-remote.lo: mi/$(am__dirstamp) mi/$(DEPDIR)/$(am__dirstamp)
+mi/Gfind_dynamic_proc_info.lo: mi/$(am__dirstamp) \
+	mi/$(DEPDIR)/$(am__dirstamp)
+mi/Gget_accessors.lo: mi/$(am__dirstamp) mi/$(DEPDIR)/$(am__dirstamp)
+mi/Gget_proc_info_by_ip.lo: mi/$(am__dirstamp) \
+	mi/$(DEPDIR)/$(am__dirstamp)
+mi/Gget_proc_name.lo: mi/$(am__dirstamp) mi/$(DEPDIR)/$(am__dirstamp)
+mi/Gput_dynamic_unwind_info.lo: mi/$(am__dirstamp) \
+	mi/$(DEPDIR)/$(am__dirstamp)
+mi/Gdestroy_addr_space.lo: mi/$(am__dirstamp) \
+	mi/$(DEPDIR)/$(am__dirstamp)
+mi/Gget_reg.lo: mi/$(am__dirstamp) mi/$(DEPDIR)/$(am__dirstamp)
+mi/Gset_reg.lo: mi/$(am__dirstamp) mi/$(DEPDIR)/$(am__dirstamp)
+mi/Gget_fpreg.lo: mi/$(am__dirstamp) mi/$(DEPDIR)/$(am__dirstamp)
+mi/Gset_fpreg.lo: mi/$(am__dirstamp) mi/$(DEPDIR)/$(am__dirstamp)
+mi/Gset_caching_policy.lo: mi/$(am__dirstamp) \
+	mi/$(DEPDIR)/$(am__dirstamp)
+mi/Gset_cache_size.lo: mi/$(am__dirstamp) mi/$(DEPDIR)/$(am__dirstamp)
+aarch64/Gapply_reg_state.lo: aarch64/$(am__dirstamp) \
+	aarch64/$(DEPDIR)/$(am__dirstamp)
+aarch64/Greg_states_iterate.lo: aarch64/$(am__dirstamp) \
+	aarch64/$(DEPDIR)/$(am__dirstamp)
+aarch64/Gcreate_addr_space.lo: aarch64/$(am__dirstamp) \
+	aarch64/$(DEPDIR)/$(am__dirstamp)
+aarch64/Gget_proc_info.lo: aarch64/$(am__dirstamp) \
+	aarch64/$(DEPDIR)/$(am__dirstamp)
+aarch64/Gget_save_loc.lo: aarch64/$(am__dirstamp) \
+	aarch64/$(DEPDIR)/$(am__dirstamp)
+aarch64/Gglobal.lo: aarch64/$(am__dirstamp) \
+	aarch64/$(DEPDIR)/$(am__dirstamp)
+aarch64/Ginit.lo: aarch64/$(am__dirstamp) \
+	aarch64/$(DEPDIR)/$(am__dirstamp)
+aarch64/Ginit_local.lo: aarch64/$(am__dirstamp) \
+	aarch64/$(DEPDIR)/$(am__dirstamp)
+aarch64/Ginit_remote.lo: aarch64/$(am__dirstamp) \
+	aarch64/$(DEPDIR)/$(am__dirstamp)
+aarch64/Gis_signal_frame.lo: aarch64/$(am__dirstamp) \
+	aarch64/$(DEPDIR)/$(am__dirstamp)
+aarch64/Gregs.lo: aarch64/$(am__dirstamp) \
+	aarch64/$(DEPDIR)/$(am__dirstamp)
+aarch64/Gresume.lo: aarch64/$(am__dirstamp) \
+	aarch64/$(DEPDIR)/$(am__dirstamp)
+aarch64/Gstash_frame.lo: aarch64/$(am__dirstamp) \
+	aarch64/$(DEPDIR)/$(am__dirstamp)
+aarch64/Gstep.lo: aarch64/$(am__dirstamp) \
+	aarch64/$(DEPDIR)/$(am__dirstamp)
+aarch64/Gtrace.lo: aarch64/$(am__dirstamp) \
+	aarch64/$(DEPDIR)/$(am__dirstamp)
+
+libunwind-aarch64.la: $(libunwind_aarch64_la_OBJECTS) $(libunwind_aarch64_la_DEPENDENCIES) $(EXTRA_libunwind_aarch64_la_DEPENDENCIES) 
+	$(AM_V_CCLD)$(libunwind_aarch64_la_LINK) $(am_libunwind_aarch64_la_rpath) $(libunwind_aarch64_la_OBJECTS) $(libunwind_aarch64_la_LIBADD) $(LIBS)
+arm/$(am__dirstamp):
+	@$(MKDIR_P) arm
+	@: > arm/$(am__dirstamp)
+arm/$(DEPDIR)/$(am__dirstamp):
+	@$(MKDIR_P) arm/$(DEPDIR)
+	@: > arm/$(DEPDIR)/$(am__dirstamp)
+arm/is_fpreg.lo: arm/$(am__dirstamp) arm/$(DEPDIR)/$(am__dirstamp)
+arm/regname.lo: arm/$(am__dirstamp) arm/$(DEPDIR)/$(am__dirstamp)
+arm/Gos-freebsd.lo: arm/$(am__dirstamp) arm/$(DEPDIR)/$(am__dirstamp)
+arm/Gos-linux.lo: arm/$(am__dirstamp) arm/$(DEPDIR)/$(am__dirstamp)
+arm/Gos-other.lo: arm/$(am__dirstamp) arm/$(DEPDIR)/$(am__dirstamp)
+arm/Gapply_reg_state.lo: arm/$(am__dirstamp) \
+	arm/$(DEPDIR)/$(am__dirstamp)
+arm/Greg_states_iterate.lo: arm/$(am__dirstamp) \
+	arm/$(DEPDIR)/$(am__dirstamp)
+arm/Gcreate_addr_space.lo: arm/$(am__dirstamp) \
+	arm/$(DEPDIR)/$(am__dirstamp)
+arm/Gget_proc_info.lo: arm/$(am__dirstamp) \
+	arm/$(DEPDIR)/$(am__dirstamp)
+arm/Gget_save_loc.lo: arm/$(am__dirstamp) \
+	arm/$(DEPDIR)/$(am__dirstamp)
+arm/Gglobal.lo: arm/$(am__dirstamp) arm/$(DEPDIR)/$(am__dirstamp)
+arm/Ginit.lo: arm/$(am__dirstamp) arm/$(DEPDIR)/$(am__dirstamp)
+arm/Ginit_local.lo: arm/$(am__dirstamp) arm/$(DEPDIR)/$(am__dirstamp)
+arm/Ginit_remote.lo: arm/$(am__dirstamp) arm/$(DEPDIR)/$(am__dirstamp)
+arm/Gregs.lo: arm/$(am__dirstamp) arm/$(DEPDIR)/$(am__dirstamp)
+arm/Gresume.lo: arm/$(am__dirstamp) arm/$(DEPDIR)/$(am__dirstamp)
+arm/Gstep.lo: arm/$(am__dirstamp) arm/$(DEPDIR)/$(am__dirstamp)
+arm/Gex_tables.lo: arm/$(am__dirstamp) arm/$(DEPDIR)/$(am__dirstamp)
+arm/Gstash_frame.lo: arm/$(am__dirstamp) arm/$(DEPDIR)/$(am__dirstamp)
+arm/Gtrace.lo: arm/$(am__dirstamp) arm/$(DEPDIR)/$(am__dirstamp)
+
+libunwind-arm.la: $(libunwind_arm_la_OBJECTS) $(libunwind_arm_la_DEPENDENCIES) $(EXTRA_libunwind_arm_la_DEPENDENCIES) 
+	$(AM_V_CCLD)$(libunwind_arm_la_LINK) $(am_libunwind_arm_la_rpath) $(libunwind_arm_la_OBJECTS) $(libunwind_arm_la_LIBADD) $(LIBS)
+coredump/$(am__dirstamp):
+	@$(MKDIR_P) coredump
+	@: > coredump/$(am__dirstamp)
+coredump/$(DEPDIR)/$(am__dirstamp):
+	@$(MKDIR_P) coredump/$(DEPDIR)
+	@: > coredump/$(DEPDIR)/$(am__dirstamp)
+coredump/_UCD_accessors.lo: coredump/$(am__dirstamp) \
+	coredump/$(DEPDIR)/$(am__dirstamp)
+coredump/_UCD_create.lo: coredump/$(am__dirstamp) \
+	coredump/$(DEPDIR)/$(am__dirstamp)
+coredump/_UCD_destroy.lo: coredump/$(am__dirstamp) \
+	coredump/$(DEPDIR)/$(am__dirstamp)
+coredump/_UCD_access_mem.lo: coredump/$(am__dirstamp) \
+	coredump/$(DEPDIR)/$(am__dirstamp)
+coredump/_UCD_elf_map_image.lo: coredump/$(am__dirstamp) \
+	coredump/$(DEPDIR)/$(am__dirstamp)
+coredump/_UCD_find_proc_info.lo: coredump/$(am__dirstamp) \
+	coredump/$(DEPDIR)/$(am__dirstamp)
+coredump/_UCD_get_proc_name.lo: coredump/$(am__dirstamp) \
+	coredump/$(DEPDIR)/$(am__dirstamp)
+coredump/_UPT_elf.lo: coredump/$(am__dirstamp) \
+	coredump/$(DEPDIR)/$(am__dirstamp)
+coredump/_UPT_access_fpreg.lo: coredump/$(am__dirstamp) \
+	coredump/$(DEPDIR)/$(am__dirstamp)
+coredump/_UPT_get_dyn_info_list_addr.lo: coredump/$(am__dirstamp) \
+	coredump/$(DEPDIR)/$(am__dirstamp)
+coredump/_UPT_put_unwind_info.lo: coredump/$(am__dirstamp) \
+	coredump/$(DEPDIR)/$(am__dirstamp)
+coredump/_UPT_resume.lo: coredump/$(am__dirstamp) \
+	coredump/$(DEPDIR)/$(am__dirstamp)
+coredump/_UCD_access_reg_linux.lo: coredump/$(am__dirstamp) \
+	coredump/$(DEPDIR)/$(am__dirstamp)
+coredump/_UCD_access_reg_freebsd.lo: coredump/$(am__dirstamp) \
+	coredump/$(DEPDIR)/$(am__dirstamp)
+
+libunwind-coredump.la: $(libunwind_coredump_la_OBJECTS) $(libunwind_coredump_la_DEPENDENCIES) $(EXTRA_libunwind_coredump_la_DEPENDENCIES) 
+	$(AM_V_CCLD)$(libunwind_coredump_la_LINK) $(am_libunwind_coredump_la_rpath) $(libunwind_coredump_la_OBJECTS) $(libunwind_coredump_la_LIBADD) $(LIBS)
+dwarf/$(am__dirstamp):
+	@$(MKDIR_P) dwarf
+	@: > dwarf/$(am__dirstamp)
+dwarf/$(DEPDIR)/$(am__dirstamp):
+	@$(MKDIR_P) dwarf/$(DEPDIR)
+	@: > dwarf/$(DEPDIR)/$(am__dirstamp)
+dwarf/global.lo: dwarf/$(am__dirstamp) dwarf/$(DEPDIR)/$(am__dirstamp)
+
+libunwind-dwarf-common.la: $(libunwind_dwarf_common_la_OBJECTS) $(libunwind_dwarf_common_la_DEPENDENCIES) $(EXTRA_libunwind_dwarf_common_la_DEPENDENCIES) 
+	$(AM_V_CCLD)$(LINK) $(am_libunwind_dwarf_common_la_rpath) $(libunwind_dwarf_common_la_OBJECTS) $(libunwind_dwarf_common_la_LIBADD) $(LIBS)
+dwarf/Gexpr.lo: dwarf/$(am__dirstamp) dwarf/$(DEPDIR)/$(am__dirstamp)
+dwarf/Gfde.lo: dwarf/$(am__dirstamp) dwarf/$(DEPDIR)/$(am__dirstamp)
+dwarf/Gparser.lo: dwarf/$(am__dirstamp) \
+	dwarf/$(DEPDIR)/$(am__dirstamp)
+dwarf/Gpe.lo: dwarf/$(am__dirstamp) dwarf/$(DEPDIR)/$(am__dirstamp)
+dwarf/Gfind_proc_info-lsb.lo: dwarf/$(am__dirstamp) \
+	dwarf/$(DEPDIR)/$(am__dirstamp)
+dwarf/Gfind_unwind_table.lo: dwarf/$(am__dirstamp) \
+	dwarf/$(DEPDIR)/$(am__dirstamp)
+
+libunwind-dwarf-generic.la: $(libunwind_dwarf_generic_la_OBJECTS) $(libunwind_dwarf_generic_la_DEPENDENCIES) $(EXTRA_libunwind_dwarf_generic_la_DEPENDENCIES) 
+	$(AM_V_CCLD)$(LINK) $(am_libunwind_dwarf_generic_la_rpath) $(libunwind_dwarf_generic_la_OBJECTS) $(libunwind_dwarf_generic_la_LIBADD) $(LIBS)
+dwarf/Lexpr.lo: dwarf/$(am__dirstamp) dwarf/$(DEPDIR)/$(am__dirstamp)
+dwarf/Lfde.lo: dwarf/$(am__dirstamp) dwarf/$(DEPDIR)/$(am__dirstamp)
+dwarf/Lparser.lo: dwarf/$(am__dirstamp) \
+	dwarf/$(DEPDIR)/$(am__dirstamp)
+dwarf/Lpe.lo: dwarf/$(am__dirstamp) dwarf/$(DEPDIR)/$(am__dirstamp)
+dwarf/Lfind_proc_info-lsb.lo: dwarf/$(am__dirstamp) \
+	dwarf/$(DEPDIR)/$(am__dirstamp)
+dwarf/Lfind_unwind_table.lo: dwarf/$(am__dirstamp) \
+	dwarf/$(DEPDIR)/$(am__dirstamp)
+
+libunwind-dwarf-local.la: $(libunwind_dwarf_local_la_OBJECTS) $(libunwind_dwarf_local_la_DEPENDENCIES) $(EXTRA_libunwind_dwarf_local_la_DEPENDENCIES) 
+	$(AM_V_CCLD)$(LINK) $(am_libunwind_dwarf_local_la_rpath) $(libunwind_dwarf_local_la_OBJECTS) $(libunwind_dwarf_local_la_LIBADD) $(LIBS)
+
+libunwind-elf32.la: $(libunwind_elf32_la_OBJECTS) $(libunwind_elf32_la_DEPENDENCIES) $(EXTRA_libunwind_elf32_la_DEPENDENCIES) 
+	$(AM_V_CCLD)$(LINK) $(am_libunwind_elf32_la_rpath) $(libunwind_elf32_la_OBJECTS) $(libunwind_elf32_la_LIBADD) $(LIBS)
+
+libunwind-elf64.la: $(libunwind_elf64_la_OBJECTS) $(libunwind_elf64_la_DEPENDENCIES) $(EXTRA_libunwind_elf64_la_DEPENDENCIES) 
+	$(AM_V_CCLD)$(LINK) $(am_libunwind_elf64_la_rpath) $(libunwind_elf64_la_OBJECTS) $(libunwind_elf64_la_LIBADD) $(LIBS)
+
+libunwind-elfxx.la: $(libunwind_elfxx_la_OBJECTS) $(libunwind_elfxx_la_DEPENDENCIES) $(EXTRA_libunwind_elfxx_la_DEPENDENCIES) 
+	$(AM_V_CCLD)$(LINK) $(am_libunwind_elfxx_la_rpath) $(libunwind_elfxx_la_OBJECTS) $(libunwind_elfxx_la_LIBADD) $(LIBS)
+hppa/$(am__dirstamp):
+	@$(MKDIR_P) hppa
+	@: > hppa/$(am__dirstamp)
+hppa/$(DEPDIR)/$(am__dirstamp):
+	@$(MKDIR_P) hppa/$(DEPDIR)
+	@: > hppa/$(DEPDIR)/$(am__dirstamp)
+hppa/regname.lo: hppa/$(am__dirstamp) hppa/$(DEPDIR)/$(am__dirstamp)
+hppa/Gapply_reg_state.lo: hppa/$(am__dirstamp) \
+	hppa/$(DEPDIR)/$(am__dirstamp)
+hppa/Greg_states_iterate.lo: hppa/$(am__dirstamp) \
+	hppa/$(DEPDIR)/$(am__dirstamp)
+hppa/Gcreate_addr_space.lo: hppa/$(am__dirstamp) \
+	hppa/$(DEPDIR)/$(am__dirstamp)
+hppa/Gget_save_loc.lo: hppa/$(am__dirstamp) \
+	hppa/$(DEPDIR)/$(am__dirstamp)
+hppa/Gglobal.lo: hppa/$(am__dirstamp) hppa/$(DEPDIR)/$(am__dirstamp)
+hppa/Ginit.lo: hppa/$(am__dirstamp) hppa/$(DEPDIR)/$(am__dirstamp)
+hppa/Ginit_local.lo: hppa/$(am__dirstamp) \
+	hppa/$(DEPDIR)/$(am__dirstamp)
+hppa/Ginit_remote.lo: hppa/$(am__dirstamp) \
+	hppa/$(DEPDIR)/$(am__dirstamp)
+hppa/Gis_signal_frame.lo: hppa/$(am__dirstamp) \
+	hppa/$(DEPDIR)/$(am__dirstamp)
+hppa/Gget_proc_info.lo: hppa/$(am__dirstamp) \
+	hppa/$(DEPDIR)/$(am__dirstamp)
+hppa/Gregs.lo: hppa/$(am__dirstamp) hppa/$(DEPDIR)/$(am__dirstamp)
+hppa/Gresume.lo: hppa/$(am__dirstamp) hppa/$(DEPDIR)/$(am__dirstamp)
+hppa/Gstep.lo: hppa/$(am__dirstamp) hppa/$(DEPDIR)/$(am__dirstamp)
+
+libunwind-hppa.la: $(libunwind_hppa_la_OBJECTS) $(libunwind_hppa_la_DEPENDENCIES) $(EXTRA_libunwind_hppa_la_DEPENDENCIES) 
+	$(AM_V_CCLD)$(libunwind_hppa_la_LINK) $(am_libunwind_hppa_la_rpath) $(libunwind_hppa_la_OBJECTS) $(libunwind_hppa_la_LIBADD) $(LIBS)
+ia64/$(am__dirstamp):
+	@$(MKDIR_P) ia64
+	@: > ia64/$(am__dirstamp)
+ia64/$(DEPDIR)/$(am__dirstamp):
+	@$(MKDIR_P) ia64/$(DEPDIR)
+	@: > ia64/$(DEPDIR)/$(am__dirstamp)
+ia64/regname.lo: ia64/$(am__dirstamp) ia64/$(DEPDIR)/$(am__dirstamp)
+ia64/Gapply_reg_state.lo: ia64/$(am__dirstamp) \
+	ia64/$(DEPDIR)/$(am__dirstamp)
+ia64/Greg_states_iterate.lo: ia64/$(am__dirstamp) \
+	ia64/$(DEPDIR)/$(am__dirstamp)
+ia64/Gcreate_addr_space.lo: ia64/$(am__dirstamp) \
+	ia64/$(DEPDIR)/$(am__dirstamp)
+ia64/Gget_proc_info.lo: ia64/$(am__dirstamp) \
+	ia64/$(DEPDIR)/$(am__dirstamp)
+ia64/Gget_save_loc.lo: ia64/$(am__dirstamp) \
+	ia64/$(DEPDIR)/$(am__dirstamp)
+ia64/Gglobal.lo: ia64/$(am__dirstamp) ia64/$(DEPDIR)/$(am__dirstamp)
+ia64/Ginit.lo: ia64/$(am__dirstamp) ia64/$(DEPDIR)/$(am__dirstamp)
+ia64/Ginit_local.lo: ia64/$(am__dirstamp) \
+	ia64/$(DEPDIR)/$(am__dirstamp)
+ia64/Ginit_remote.lo: ia64/$(am__dirstamp) \
+	ia64/$(DEPDIR)/$(am__dirstamp)
+ia64/Ginstall_cursor.lo: ia64/$(am__dirstamp) \
+	ia64/$(DEPDIR)/$(am__dirstamp)
+ia64/Gis_signal_frame.lo: ia64/$(am__dirstamp) \
+	ia64/$(DEPDIR)/$(am__dirstamp)
+ia64/Gparser.lo: ia64/$(am__dirstamp) ia64/$(DEPDIR)/$(am__dirstamp)
+ia64/Grbs.lo: ia64/$(am__dirstamp) ia64/$(DEPDIR)/$(am__dirstamp)
+ia64/Gregs.lo: ia64/$(am__dirstamp) ia64/$(DEPDIR)/$(am__dirstamp)
+ia64/Gresume.lo: ia64/$(am__dirstamp) ia64/$(DEPDIR)/$(am__dirstamp)
+ia64/Gscript.lo: ia64/$(am__dirstamp) ia64/$(DEPDIR)/$(am__dirstamp)
+ia64/Gstep.lo: ia64/$(am__dirstamp) ia64/$(DEPDIR)/$(am__dirstamp)
+ia64/Gtables.lo: ia64/$(am__dirstamp) ia64/$(DEPDIR)/$(am__dirstamp)
+ia64/Gfind_unwind_table.lo: ia64/$(am__dirstamp) \
+	ia64/$(DEPDIR)/$(am__dirstamp)
+
+libunwind-ia64.la: $(libunwind_ia64_la_OBJECTS) $(libunwind_ia64_la_DEPENDENCIES) $(EXTRA_libunwind_ia64_la_DEPENDENCIES) 
+	$(AM_V_CCLD)$(libunwind_ia64_la_LINK) $(am_libunwind_ia64_la_rpath) $(libunwind_ia64_la_OBJECTS) $(libunwind_ia64_la_LIBADD) $(LIBS)
+mips/$(am__dirstamp):
+	@$(MKDIR_P) mips
+	@: > mips/$(am__dirstamp)
+mips/$(DEPDIR)/$(am__dirstamp):
+	@$(MKDIR_P) mips/$(DEPDIR)
+	@: > mips/$(DEPDIR)/$(am__dirstamp)
+mips/is_fpreg.lo: mips/$(am__dirstamp) mips/$(DEPDIR)/$(am__dirstamp)
+mips/regname.lo: mips/$(am__dirstamp) mips/$(DEPDIR)/$(am__dirstamp)
+mips/Gapply_reg_state.lo: mips/$(am__dirstamp) \
+	mips/$(DEPDIR)/$(am__dirstamp)
+mips/Greg_states_iterate.lo: mips/$(am__dirstamp) \
+	mips/$(DEPDIR)/$(am__dirstamp)
+mips/Gcreate_addr_space.lo: mips/$(am__dirstamp) \
+	mips/$(DEPDIR)/$(am__dirstamp)
+mips/Gget_proc_info.lo: mips/$(am__dirstamp) \
+	mips/$(DEPDIR)/$(am__dirstamp)
+mips/Gget_save_loc.lo: mips/$(am__dirstamp) \
+	mips/$(DEPDIR)/$(am__dirstamp)
+mips/Gglobal.lo: mips/$(am__dirstamp) mips/$(DEPDIR)/$(am__dirstamp)
+mips/Ginit.lo: mips/$(am__dirstamp) mips/$(DEPDIR)/$(am__dirstamp)
+mips/Ginit_local.lo: mips/$(am__dirstamp) \
+	mips/$(DEPDIR)/$(am__dirstamp)
+mips/Ginit_remote.lo: mips/$(am__dirstamp) \
+	mips/$(DEPDIR)/$(am__dirstamp)
+mips/Gis_signal_frame.lo: mips/$(am__dirstamp) \
+	mips/$(DEPDIR)/$(am__dirstamp)
+mips/Gregs.lo: mips/$(am__dirstamp) mips/$(DEPDIR)/$(am__dirstamp)
+mips/Gresume.lo: mips/$(am__dirstamp) mips/$(DEPDIR)/$(am__dirstamp)
+mips/Gstep.lo: mips/$(am__dirstamp) mips/$(DEPDIR)/$(am__dirstamp)
+
+libunwind-mips.la: $(libunwind_mips_la_OBJECTS) $(libunwind_mips_la_DEPENDENCIES) $(EXTRA_libunwind_mips_la_DEPENDENCIES) 
+	$(AM_V_CCLD)$(libunwind_mips_la_LINK) $(am_libunwind_mips_la_rpath) $(libunwind_mips_la_OBJECTS) $(libunwind_mips_la_LIBADD) $(LIBS)
+ppc32/$(am__dirstamp):
+	@$(MKDIR_P) ppc32
+	@: > ppc32/$(am__dirstamp)
+ppc32/$(DEPDIR)/$(am__dirstamp):
+	@$(MKDIR_P) ppc32/$(DEPDIR)
+	@: > ppc32/$(DEPDIR)/$(am__dirstamp)
+ppc32/is_fpreg.lo: ppc32/$(am__dirstamp) \
+	ppc32/$(DEPDIR)/$(am__dirstamp)
+ppc32/regname.lo: ppc32/$(am__dirstamp) \
+	ppc32/$(DEPDIR)/$(am__dirstamp)
+ppc32/get_func_addr.lo: ppc32/$(am__dirstamp) \
+	ppc32/$(DEPDIR)/$(am__dirstamp)
+ppc/$(am__dirstamp):
+	@$(MKDIR_P) ppc
+	@: > ppc/$(am__dirstamp)
+ppc/$(DEPDIR)/$(am__dirstamp):
+	@$(MKDIR_P) ppc/$(DEPDIR)
+	@: > ppc/$(DEPDIR)/$(am__dirstamp)
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+	ppc/$(DEPDIR)/$(am__dirstamp)
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+	ppc/$(DEPDIR)/$(am__dirstamp)
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+	ppc/$(DEPDIR)/$(am__dirstamp)
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+	ppc32/$(DEPDIR)/$(am__dirstamp)
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+	ppc32/$(DEPDIR)/$(am__dirstamp)
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+	ppc32/$(DEPDIR)/$(am__dirstamp)
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+	ppc32/$(DEPDIR)/$(am__dirstamp)
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+	ppc32/$(DEPDIR)/$(am__dirstamp)
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+
+libunwind-ppc32.la: $(libunwind_ppc32_la_OBJECTS) $(libunwind_ppc32_la_DEPENDENCIES) $(EXTRA_libunwind_ppc32_la_DEPENDENCIES) 
+	$(AM_V_CCLD)$(libunwind_ppc32_la_LINK) $(am_libunwind_ppc32_la_rpath) $(libunwind_ppc32_la_OBJECTS) $(libunwind_ppc32_la_LIBADD) $(LIBS)
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+	@$(MKDIR_P) ppc64
+	@: > ppc64/$(am__dirstamp)
+ppc64/$(DEPDIR)/$(am__dirstamp):
+	@$(MKDIR_P) ppc64/$(DEPDIR)
+	@: > ppc64/$(DEPDIR)/$(am__dirstamp)
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+	ppc64/$(DEPDIR)/$(am__dirstamp)
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+	ppc64/$(DEPDIR)/$(am__dirstamp)
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+	ppc64/$(DEPDIR)/$(am__dirstamp)
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+	ppc64/$(DEPDIR)/$(am__dirstamp)
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+	ppc64/$(DEPDIR)/$(am__dirstamp)
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+	ppc64/$(DEPDIR)/$(am__dirstamp)
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+	ppc64/$(DEPDIR)/$(am__dirstamp)
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+
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+	$(AM_V_CCLD)$(libunwind_ppc64_la_LINK) $(am_libunwind_ppc64_la_rpath) $(libunwind_ppc64_la_OBJECTS) $(libunwind_ppc64_la_LIBADD) $(LIBS)
+ptrace/$(am__dirstamp):
+	@$(MKDIR_P) ptrace
+	@: > ptrace/$(am__dirstamp)
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+	@$(MKDIR_P) ptrace/$(DEPDIR)
+	@: > ptrace/$(DEPDIR)/$(am__dirstamp)
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+	ptrace/$(DEPDIR)/$(am__dirstamp)
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+	ptrace/$(DEPDIR)/$(am__dirstamp)
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+	ptrace/$(DEPDIR)/$(am__dirstamp)
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+	ptrace/$(DEPDIR)/$(am__dirstamp)
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+	ptrace/$(DEPDIR)/$(am__dirstamp)
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+	ptrace/$(DEPDIR)/$(am__dirstamp)
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+	ptrace/$(DEPDIR)/$(am__dirstamp)
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+	ptrace/$(DEPDIR)/$(am__dirstamp)
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+	ptrace/$(DEPDIR)/$(am__dirstamp)
+
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+	$(AM_V_CCLD)$(LINK) $(am_libunwind_ptrace_la_rpath) $(libunwind_ptrace_la_OBJECTS) $(libunwind_ptrace_la_LIBADD) $(LIBS)
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+	@$(MKDIR_P) s390x
+	@: > s390x/$(am__dirstamp)
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+	@$(MKDIR_P) s390x/$(DEPDIR)
+	@: > s390x/$(DEPDIR)/$(am__dirstamp)
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+	s390x/$(DEPDIR)/$(am__dirstamp)
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+	s390x/$(DEPDIR)/$(am__dirstamp)
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+	s390x/$(DEPDIR)/$(am__dirstamp)
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+	s390x/$(DEPDIR)/$(am__dirstamp)
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+	s390x/$(DEPDIR)/$(am__dirstamp)
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+	s390x/$(DEPDIR)/$(am__dirstamp)
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+	$(AM_V_CCLD)$(libunwind_s390x_la_LINK) $(am_libunwind_s390x_la_rpath) $(libunwind_s390x_la_OBJECTS) $(libunwind_s390x_la_LIBADD) $(LIBS)
+setjmp/$(am__dirstamp):
+	@$(MKDIR_P) setjmp
+	@: > setjmp/$(am__dirstamp)
+setjmp/$(DEPDIR)/$(am__dirstamp):
+	@$(MKDIR_P) setjmp/$(DEPDIR)
+	@: > setjmp/$(DEPDIR)/$(am__dirstamp)
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+	setjmp/$(DEPDIR)/$(am__dirstamp)
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+	setjmp/$(DEPDIR)/$(am__dirstamp)
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+	aarch64/$(DEPDIR)/$(am__dirstamp)
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+	mips/$(DEPDIR)/$(am__dirstamp)
+tilegx/$(am__dirstamp):
+	@$(MKDIR_P) tilegx
+	@: > tilegx/$(am__dirstamp)
+tilegx/$(DEPDIR)/$(am__dirstamp):
+	@$(MKDIR_P) tilegx/$(DEPDIR)
+	@: > tilegx/$(DEPDIR)/$(am__dirstamp)
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+	tilegx/$(DEPDIR)/$(am__dirstamp)
+x86/$(am__dirstamp):
+	@$(MKDIR_P) x86
+	@: > x86/$(am__dirstamp)
+x86/$(DEPDIR)/$(am__dirstamp):
+	@$(MKDIR_P) x86/$(DEPDIR)
+	@: > x86/$(DEPDIR)/$(am__dirstamp)
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+x86_64/$(am__dirstamp):
+	@$(MKDIR_P) x86_64
+	@: > x86_64/$(am__dirstamp)
+x86_64/$(DEPDIR)/$(am__dirstamp):
+	@$(MKDIR_P) x86_64/$(DEPDIR)
+	@: > x86_64/$(DEPDIR)/$(am__dirstamp)
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+sh/$(am__dirstamp):
+	@$(MKDIR_P) sh
+	@: > sh/$(am__dirstamp)
+sh/$(DEPDIR)/$(am__dirstamp):
+	@$(MKDIR_P) sh/$(DEPDIR)
+	@: > sh/$(DEPDIR)/$(am__dirstamp)
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+
+libunwind-setjmp.la: $(libunwind_setjmp_la_OBJECTS) $(libunwind_setjmp_la_DEPENDENCIES) $(EXTRA_libunwind_setjmp_la_DEPENDENCIES) 
+	$(AM_V_CCLD)$(libunwind_setjmp_la_LINK) $(am_libunwind_setjmp_la_rpath) $(libunwind_setjmp_la_OBJECTS) $(libunwind_setjmp_la_LIBADD) $(LIBS)
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+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
+	  sed -e "s|^$$srcdirstrip/||;t" \
+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+check: $(BUILT_SOURCES)
+	$(MAKE) $(AM_MAKEFLAGS) check-am
+all-am: Makefile $(LIBRARIES) $(LTLIBRARIES) $(DATA) $(HEADERS)
+installdirs:
+	for dir in "$(DESTDIR)$(libdir)" "$(DESTDIR)$(libdir)" "$(DESTDIR)$(pkgconfigdir)"; do \
+	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
+	done
+install: $(BUILT_SOURCES)
+	$(MAKE) $(AM_MAKEFLAGS) install-am
+install-exec: install-exec-am
+install-data: install-data-am
+uninstall: uninstall-am
+
+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-am
+install-strip:
+	if test -z '$(STRIP)'; then \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+	-rm -f aarch64/$(DEPDIR)/$(am__dirstamp)
+	-rm -f aarch64/$(am__dirstamp)
+	-rm -f arm/$(DEPDIR)/$(am__dirstamp)
+	-rm -f arm/$(am__dirstamp)
+	-rm -f coredump/$(DEPDIR)/$(am__dirstamp)
+	-rm -f coredump/$(am__dirstamp)
+	-rm -f dwarf/$(DEPDIR)/$(am__dirstamp)
+	-rm -f dwarf/$(am__dirstamp)
+	-rm -f hppa/$(DEPDIR)/$(am__dirstamp)
+	-rm -f hppa/$(am__dirstamp)
+	-rm -f ia64/$(DEPDIR)/$(am__dirstamp)
+	-rm -f ia64/$(am__dirstamp)
+	-rm -f mi/$(DEPDIR)/$(am__dirstamp)
+	-rm -f mi/$(am__dirstamp)
+	-rm -f mips/$(DEPDIR)/$(am__dirstamp)
+	-rm -f mips/$(am__dirstamp)
+	-rm -f ppc/$(DEPDIR)/$(am__dirstamp)
+	-rm -f ppc/$(am__dirstamp)
+	-rm -f ppc32/$(DEPDIR)/$(am__dirstamp)
+	-rm -f ppc32/$(am__dirstamp)
+	-rm -f ppc64/$(DEPDIR)/$(am__dirstamp)
+	-rm -f ppc64/$(am__dirstamp)
+	-rm -f ptrace/$(DEPDIR)/$(am__dirstamp)
+	-rm -f ptrace/$(am__dirstamp)
+	-rm -f s390x/$(DEPDIR)/$(am__dirstamp)
+	-rm -f s390x/$(am__dirstamp)
+	-rm -f setjmp/$(DEPDIR)/$(am__dirstamp)
+	-rm -f setjmp/$(am__dirstamp)
+	-rm -f sh/$(DEPDIR)/$(am__dirstamp)
+	-rm -f sh/$(am__dirstamp)
+	-rm -f tilegx/$(DEPDIR)/$(am__dirstamp)
+	-rm -f tilegx/$(am__dirstamp)
+	-rm -f unwind/$(DEPDIR)/$(am__dirstamp)
+	-rm -f unwind/$(am__dirstamp)
+	-rm -f x86/$(DEPDIR)/$(am__dirstamp)
+	-rm -f x86/$(am__dirstamp)
+	-rm -f x86_64/$(DEPDIR)/$(am__dirstamp)
+	-rm -f x86_64/$(am__dirstamp)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+	-test -z "$(BUILT_SOURCES)" || rm -f $(BUILT_SOURCES)
+	-test -z "$(MAINTAINERCLEANFILES)" || rm -f $(MAINTAINERCLEANFILES)
+clean: clean-am
+
+clean-am: clean-generic clean-libLIBRARIES clean-libLTLIBRARIES \
+	clean-libtool clean-noinstLTLIBRARIES mostlyclean-am
+
+distclean: distclean-am
+	-rm -rf ./$(DEPDIR) aarch64/$(DEPDIR) arm/$(DEPDIR) coredump/$(DEPDIR) dwarf/$(DEPDIR) hppa/$(DEPDIR) ia64/$(DEPDIR) mi/$(DEPDIR) mips/$(DEPDIR) ppc/$(DEPDIR) ppc32/$(DEPDIR) ppc64/$(DEPDIR) ptrace/$(DEPDIR) s390x/$(DEPDIR) setjmp/$(DEPDIR) sh/$(DEPDIR) tilegx/$(DEPDIR) unwind/$(DEPDIR) x86/$(DEPDIR) x86_64/$(DEPDIR)
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
+
+info: info-am
+
+info-am:
+
+install-data-am: install-pkgconfigDATA
+
+install-dvi: install-dvi-am
+
+install-dvi-am:
+
+install-exec-am: install-libLIBRARIES install-libLTLIBRARIES
+	@$(NORMAL_INSTALL)
+	$(MAKE) $(AM_MAKEFLAGS) install-exec-hook
+install-html: install-html-am
+
+install-html-am:
+
+install-info: install-info-am
+
+install-info-am:
+
+install-man:
+
+install-pdf: install-pdf-am
+
+install-pdf-am:
+
+install-ps: install-ps-am
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+	-rm -rf ./$(DEPDIR) aarch64/$(DEPDIR) arm/$(DEPDIR) coredump/$(DEPDIR) dwarf/$(DEPDIR) hppa/$(DEPDIR) ia64/$(DEPDIR) mi/$(DEPDIR) mips/$(DEPDIR) ppc/$(DEPDIR) ppc32/$(DEPDIR) ppc64/$(DEPDIR) ptrace/$(DEPDIR) s390x/$(DEPDIR) setjmp/$(DEPDIR) sh/$(DEPDIR) tilegx/$(DEPDIR) unwind/$(DEPDIR) x86/$(DEPDIR) x86_64/$(DEPDIR)
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+uninstall-am: uninstall-libLIBRARIES uninstall-libLTLIBRARIES \
+	uninstall-pkgconfigDATA
+
+.MAKE: all check install install-am install-exec-am install-strip
+
+.PHONY: CTAGS GTAGS TAGS all all-am check check-am clean clean-generic \
+	clean-libLIBRARIES clean-libLTLIBRARIES clean-libtool \
+	clean-noinstLTLIBRARIES cscopelist-am ctags ctags-am distclean \
+	distclean-compile distclean-generic distclean-libtool \
+	distclean-tags distdir dvi dvi-am html html-am info info-am \
+	install install-am install-data install-data-am install-dvi \
+	install-dvi-am install-exec install-exec-am install-exec-hook \
+	install-html install-html-am install-info install-info-am \
+	install-libLIBRARIES install-libLTLIBRARIES install-man \
+	install-pdf install-pdf-am install-pkgconfigDATA install-ps \
+	install-ps-am install-strip installcheck installcheck-am \
+	installdirs maintainer-clean maintainer-clean-generic \
+	mostlyclean mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool pdf pdf-am ps ps-am tags tags-am uninstall \
+	uninstall-am uninstall-libLIBRARIES uninstall-libLTLIBRARIES \
+	uninstall-pkgconfigDATA
+
+.PRECIOUS: Makefile
+
+
+@REMOTE_ONLY_TRUE@install-exec-hook:
+#	Nothing to do here....
+#
+# This is not ideal, but I know of no other way to install an
+# alias for a library.  For the shared version, we have to do
+# a file check before creating the link, because it isn't going
+# to be there if the user configured with --disable-shared.
+#
+@REMOTE_ONLY_FALSE@install-exec-hook:
+@REMOTE_ONLY_FALSE@	if test -f $(DESTDIR)$(libdir)/libunwind-$(arch).a; then \
+@REMOTE_ONLY_FALSE@		cd $(DESTDIR)$(libdir) && $(LN_S) -f libunwind-$(arch).a libunwind-generic.a; \
+@REMOTE_ONLY_FALSE@	fi
+@REMOTE_ONLY_FALSE@	if test -f $(DESTDIR)$(libdir)/libunwind-$(arch).so; then \
+@REMOTE_ONLY_FALSE@		cd $(DESTDIR)$(libdir) && $(LN_S) -f libunwind-$(arch).so \
+@REMOTE_ONLY_FALSE@		libunwind-generic.so; \
+@REMOTE_ONLY_FALSE@	fi
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_IA64_TRUE@mk_Gcursor_i.s: $(srcdir)/ia64/mk_Gcursor_i.c
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_IA64_TRUE@	$(COMPILE) -S "$(srcdir)/ia64/mk_Gcursor_i.c" -o mk_Gcursor_i.s
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_IA64_TRUE@mk_Lcursor_i.s: $(srcdir)/ia64/mk_Lcursor_i.c
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_IA64_TRUE@	$(COMPILE) -S "$(srcdir)/ia64/mk_Lcursor_i.c" -o mk_Lcursor_i.s
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_IA64_TRUE@Gcursor_i.h: mk_Gcursor_i.s
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_IA64_TRUE@	"$(srcdir)/ia64/mk_cursor_i" mk_Gcursor_i.s > Gcursor_i.h
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_IA64_TRUE@Lcursor_i.h: mk_Lcursor_i.s
+@ARCH_AARCH64_FALSE@@ARCH_ARM_FALSE@@ARCH_IA64_TRUE@	"$(srcdir)/ia64/mk_cursor_i" mk_Lcursor_i.s > Lcursor_i.h
+
+# The -version-info flag accepts an argument of the form
+# `current[:revision[:age]]'. So, passing `-version-info 3:12:1' sets
+# current to 3, revision to 12, and age to 1.
+
+# If either revision or age are omitted, they default to 0. Also note
+# that age must be less than or equal to the current interface number.
+
+# Here are a set of rules to help you update your library version
+# information:
+
+#    1. Start with version information of `0:0:0' for each libtool
+#       library.
+
+#    2. Update the version information only immediately before a public
+#       release of your software. More frequent updates are unnecessary,
+#       and only guarantee that the current interface number gets larger
+#       faster.
+
+#    3. If the library source code has changed at all since the last
+#       update, then increment revision (`c:r:a' becomes `c:r+1:a').
+
+#    4. If any interfaces have been added, removed, or changed since the
+#       last update, increment current, and set revision to 0.
+
+#    5. If any interfaces have been added since the last public release,
+#       then increment age.
+
+#    6. If any interfaces have been removed since the last public
+#       release, then set age to 0.
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/third_party/unwind/dist/src/aarch64/Gapply_reg_state.c b/src/third_party/unwind/dist/src/aarch64/Gapply_reg_state.c
new file mode 100644
index 00000000000..82f056da67e
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/Gapply_reg_state.c
@@ -0,0 +1,37 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_apply_reg_state (unw_cursor_t *cursor,
+		     void *reg_states_data)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  return dwarf_apply_reg_state (&c->dwarf, (dwarf_reg_state_t *)reg_states_data);
+}
diff --git a/src/third_party/unwind/dist/src/aarch64/Gcreate_addr_space.c b/src/third_party/unwind/dist/src/aarch64/Gcreate_addr_space.c
new file mode 100644
index 00000000000..f217adc7455
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/Gcreate_addr_space.c
@@ -0,0 +1,60 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+   Copyright (C) 2013 Linaro Limited
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <string.h>
+#include <stdlib.h>
+
+#include "unwind_i.h"
+
+unw_addr_space_t
+unw_create_addr_space (unw_accessors_t *a, int byte_order)
+{
+#ifdef UNW_LOCAL_ONLY
+  return NULL;
+#else
+  unw_addr_space_t as;
+
+  /* AArch64 supports little-endian and big-endian. */
+  if (byte_order != 0 && byte_order != __LITTLE_ENDIAN
+      && byte_order != __BIG_ENDIAN)
+    return NULL;
+
+  as = malloc (sizeof (*as));
+  if (!as)
+    return NULL;
+
+  memset (as, 0, sizeof (*as));
+
+  as->acc = *a;
+
+  /* Default to little-endian for AArch64. */
+  if (byte_order == 0 || byte_order == __LITTLE_ENDIAN)
+    as->big_endian = 0;
+  else
+    as->big_endian = 1;
+
+  return as;
+#endif
+}
diff --git a/src/third_party/unwind/dist/src/aarch64/Gget_proc_info.c b/src/third_party/unwind/dist/src/aarch64/Gget_proc_info.c
new file mode 100644
index 00000000000..c363d2405d7
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/Gget_proc_info.c
@@ -0,0 +1,39 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_get_proc_info (unw_cursor_t *cursor, unw_proc_info_t *pi)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  int ret;
+
+  ret = dwarf_make_proc_info (&c->dwarf);
+  if (ret < 0)
+    return ret;
+
+  *pi = c->dwarf.pi;
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/aarch64/Gget_save_loc.c b/src/third_party/unwind/dist/src/aarch64/Gget_save_loc.c
new file mode 100644
index 00000000000..86bbbd03d11
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/Gget_save_loc.c
@@ -0,0 +1,100 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+   Copyright (C) 2013 Linaro Limited
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_get_save_loc (unw_cursor_t *cursor, int reg, unw_save_loc_t *sloc)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  dwarf_loc_t loc;
+
+  switch (reg)
+    {
+    case UNW_AARCH64_X0:
+    case UNW_AARCH64_X1:
+    case UNW_AARCH64_X2:
+    case UNW_AARCH64_X3:
+    case UNW_AARCH64_X4:
+    case UNW_AARCH64_X5:
+    case UNW_AARCH64_X6:
+    case UNW_AARCH64_X7:
+    case UNW_AARCH64_X8:
+    case UNW_AARCH64_X9:
+    case UNW_AARCH64_X10:
+    case UNW_AARCH64_X11:
+    case UNW_AARCH64_X12:
+    case UNW_AARCH64_X13:
+    case UNW_AARCH64_X14:
+    case UNW_AARCH64_X15:
+    case UNW_AARCH64_X16:
+    case UNW_AARCH64_X17:
+    case UNW_AARCH64_X18:
+    case UNW_AARCH64_X19:
+    case UNW_AARCH64_X20:
+    case UNW_AARCH64_X21:
+    case UNW_AARCH64_X22:
+    case UNW_AARCH64_X23:
+    case UNW_AARCH64_X24:
+    case UNW_AARCH64_X25:
+    case UNW_AARCH64_X26:
+    case UNW_AARCH64_X27:
+    case UNW_AARCH64_X28:
+    case UNW_AARCH64_X29:
+    case UNW_AARCH64_X30:
+    case UNW_AARCH64_SP:
+    case UNW_AARCH64_PC:
+    case UNW_AARCH64_PSTATE:
+      loc = c->dwarf.loc[reg];
+      break;
+
+    default:
+      loc = DWARF_NULL_LOC;     /* default to "not saved" */
+      break;
+    }
+
+  memset (sloc, 0, sizeof (*sloc));
+
+  if (DWARF_IS_NULL_LOC (loc))
+    {
+      sloc->type = UNW_SLT_NONE;
+      return 0;
+    }
+
+#if !defined(UNW_LOCAL_ONLY)
+  if (DWARF_IS_REG_LOC (loc))
+    {
+      sloc->type = UNW_SLT_REG;
+      sloc->u.regnum = DWARF_GET_LOC (loc);
+    }
+  else
+#endif
+    {
+      sloc->type = UNW_SLT_MEMORY;
+      sloc->u.addr = DWARF_GET_LOC (loc);
+    }
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/aarch64/Gglobal.c b/src/third_party/unwind/dist/src/aarch64/Gglobal.c
new file mode 100644
index 00000000000..72e36b2d4d6
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/Gglobal.c
@@ -0,0 +1,57 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+   Copyright (C) 2013 Linaro Limited
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "dwarf_i.h"
+
+HIDDEN define_lock (aarch64_lock);
+HIDDEN int tdep_init_done;
+
+HIDDEN void
+tdep_init (void)
+{
+  intrmask_t saved_mask;
+
+  sigfillset (&unwi_full_mask);
+
+  lock_acquire (&aarch64_lock, saved_mask);
+  {
+    if (tdep_init_done)
+      /* another thread else beat us to it... */
+      goto out;
+
+    mi_init ();
+
+    dwarf_init ();
+
+#ifndef UNW_REMOTE_ONLY
+    aarch64_local_addr_space_init ();
+#endif
+    tdep_init_done = 1; /* signal that we're initialized... */
+  }
+ out:
+  lock_release (&aarch64_lock, saved_mask);
+}
diff --git a/src/third_party/unwind/dist/src/aarch64/Ginit.c b/src/third_party/unwind/dist/src/aarch64/Ginit.c
new file mode 100644
index 00000000000..dec235c8290
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/Ginit.c
@@ -0,0 +1,190 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+   Copyright (C) 2013 Linaro Limited
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "unwind_i.h"
+
+#ifdef UNW_REMOTE_ONLY
+
+/* unw_local_addr_space is a NULL pointer in this case.  */
+unw_addr_space_t unw_local_addr_space;
+
+#else /* !UNW_REMOTE_ONLY */
+
+static struct unw_addr_space local_addr_space;
+
+unw_addr_space_t unw_local_addr_space = &local_addr_space;
+
+static inline void *
+uc_addr (unw_tdep_context_t *uc, int reg)
+{
+  if (reg >= UNW_AARCH64_X0 && reg < UNW_AARCH64_V0)
+    return &uc->uc_mcontext.regs[reg];
+  else if (reg >= UNW_AARCH64_V0 && reg <= UNW_AARCH64_V31)
+    return &GET_FPCTX(uc)->vregs[reg - UNW_AARCH64_V0];
+  else
+    return NULL;
+}
+
+# ifdef UNW_LOCAL_ONLY
+
+HIDDEN void *
+tdep_uc_addr (unw_tdep_context_t *uc, int reg)
+{
+  return uc_addr (uc, reg);
+}
+
+# endif /* UNW_LOCAL_ONLY */
+
+HIDDEN unw_dyn_info_list_t _U_dyn_info_list;
+
+/* XXX fix me: there is currently no way to locate the dyn-info list
+       by a remote unwinder.  On ia64, this is done via a special
+       unwind-table entry.  Perhaps something similar can be done with
+       DWARF2 unwind info.  */
+
+static void
+put_unwind_info (unw_addr_space_t as, unw_proc_info_t *proc_info, void *arg)
+{
+  /* it's a no-op */
+}
+
+static int
+get_dyn_info_list_addr (unw_addr_space_t as, unw_word_t *dyn_info_list_addr,
+                        void *arg)
+{
+  *dyn_info_list_addr = (unw_word_t) &_U_dyn_info_list;
+  return 0;
+}
+
+static int
+access_mem (unw_addr_space_t as, unw_word_t addr, unw_word_t *val, int write,
+            void *arg)
+{
+  if (write)
+    {
+      Debug (16, "mem[%lx] <- %lx\n", addr, *val);
+      *(unw_word_t *) addr = *val;
+    }
+  else
+    {
+      *val = *(unw_word_t *) addr;
+      Debug (16, "mem[%lx] -> %lx\n", addr, *val);
+    }
+  return 0;
+}
+
+static int
+access_reg (unw_addr_space_t as, unw_regnum_t reg, unw_word_t *val, int write,
+            void *arg)
+{
+  unw_word_t *addr;
+  unw_tdep_context_t *uc = arg;
+
+  if (unw_is_fpreg (reg))
+    goto badreg;
+
+  if (!(addr = uc_addr (uc, reg)))
+    goto badreg;
+
+  if (write)
+    {
+      *(unw_word_t *) addr = *val;
+      Debug (12, "%s <- %lx\n", unw_regname (reg), *val);
+    }
+  else
+    {
+      *val = *(unw_word_t *) addr;
+      Debug (12, "%s -> %lx\n", unw_regname (reg), *val);
+    }
+  return 0;
+
+ badreg:
+  Debug (1, "bad register number %u\n", reg);
+  return -UNW_EBADREG;
+}
+
+static int
+access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val,
+              int write, void *arg)
+{
+  unw_tdep_context_t *uc = arg;
+  unw_fpreg_t *addr;
+
+  if (!unw_is_fpreg (reg))
+    goto badreg;
+
+  if (!(addr = uc_addr (uc, reg)))
+    goto badreg;
+
+  if (write)
+    {
+      Debug (12, "%s <- %08lx.%08lx.%08lx\n", unw_regname (reg),
+             ((long *)val)[0], ((long *)val)[1], ((long *)val)[2]);
+      *(unw_fpreg_t *) addr = *val;
+    }
+  else
+    {
+      *val = *(unw_fpreg_t *) addr;
+      Debug (12, "%s -> %08lx.%08lx.%08lx\n", unw_regname (reg),
+             ((long *)val)[0], ((long *)val)[1], ((long *)val)[2]);
+    }
+  return 0;
+
+ badreg:
+  Debug (1, "bad register number %u\n", reg);
+  /* attempt to access a non-preserved register */
+  return -UNW_EBADREG;
+}
+
+static int
+get_static_proc_name (unw_addr_space_t as, unw_word_t ip,
+                      char *buf, size_t buf_len, unw_word_t *offp,
+                      void *arg)
+{
+  return _Uelf64_get_proc_name (as, getpid (), ip, buf, buf_len, offp);
+}
+
+HIDDEN void
+aarch64_local_addr_space_init (void)
+{
+  memset (&local_addr_space, 0, sizeof (local_addr_space));
+  local_addr_space.caching_policy = UNWI_DEFAULT_CACHING_POLICY;
+  local_addr_space.acc.find_proc_info = dwarf_find_proc_info;
+  local_addr_space.acc.put_unwind_info = put_unwind_info;
+  local_addr_space.acc.get_dyn_info_list_addr = get_dyn_info_list_addr;
+  local_addr_space.acc.access_mem = access_mem;
+  local_addr_space.acc.access_reg = access_reg;
+  local_addr_space.acc.access_fpreg = access_fpreg;
+  local_addr_space.acc.resume = aarch64_local_resume;
+  local_addr_space.acc.get_proc_name = get_static_proc_name;
+  local_addr_space.big_endian = (__BYTE_ORDER == __BIG_ENDIAN);
+  unw_flush_cache (&local_addr_space, 0, 0);
+}
+
+#endif /* !UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/dist/src/aarch64/Ginit_local.c b/src/third_party/unwind/dist/src/aarch64/Ginit_local.c
new file mode 100644
index 00000000000..69d4ed3861d
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/Ginit_local.c
@@ -0,0 +1,78 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2011-2013 Linaro Limited
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "init.h"
+
+#ifdef UNW_REMOTE_ONLY
+
+int
+unw_init_local (unw_cursor_t *cursor, unw_context_t *uc)
+{
+  return -UNW_EINVAL;
+}
+
+#else /* !UNW_REMOTE_ONLY */
+
+static int
+unw_init_local_common (unw_cursor_t *cursor, unw_context_t *uc, unsigned use_prev_instr)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  if (!tdep_init_done)
+    tdep_init ();
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  c->dwarf.as = unw_local_addr_space;
+  c->dwarf.as_arg = uc;
+
+  return common_init (c, use_prev_instr);
+}
+
+int
+unw_init_local (unw_cursor_t *cursor, unw_context_t *uc)
+{
+  return unw_init_local_common(cursor, uc, 1);
+}
+
+int
+unw_init_local2 (unw_cursor_t *cursor, unw_tdep_context_t *uc, int flag)
+{
+  if (!flag)
+    {
+      return unw_init_local_common(cursor, uc, 1);
+    }
+  else if (flag == UNW_INIT_SIGNAL_FRAME)
+    {
+      return unw_init_local_common(cursor, uc, 0);
+    }
+  else
+    {
+      return -UNW_EINVAL;
+    }
+}
+
+#endif /* !UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/dist/src/aarch64/Ginit_remote.c b/src/third_party/unwind/dist/src/aarch64/Ginit_remote.c
new file mode 100644
index 00000000000..9b8ba5b89de
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/Ginit_remote.c
@@ -0,0 +1,45 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "init.h"
+#include "unwind_i.h"
+
+int
+unw_init_remote (unw_cursor_t *cursor, unw_addr_space_t as, void *as_arg)
+{
+#ifdef UNW_LOCAL_ONLY
+  return -UNW_EINVAL;
+#else /* !UNW_LOCAL_ONLY */
+  struct cursor *c = (struct cursor *) cursor;
+
+  if (!tdep_init_done)
+    tdep_init ();
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  c->dwarf.as = as;
+  c->dwarf.as_arg = as_arg;
+  return common_init (c, 0);
+#endif /* !UNW_LOCAL_ONLY */
+}
diff --git a/src/third_party/unwind/dist/src/aarch64/Gis_signal_frame.c b/src/third_party/unwind/dist/src/aarch64/Gis_signal_frame.c
new file mode 100644
index 00000000000..67159d83961
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/Gis_signal_frame.c
@@ -0,0 +1,64 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+   Copyright (C) 2013 Linaro Limited
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+/* The restorer stub will always have the form:
+
+   d2801168        movz    x8, #0x8b
+   d4000001        svc     #0x0
+*/
+
+int
+unw_is_signal_frame (unw_cursor_t *cursor)
+{
+#ifdef __linux__
+  struct cursor *c = (struct cursor *) cursor;
+  unw_word_t w0, ip;
+  unw_addr_space_t as;
+  unw_accessors_t *a;
+  void *arg;
+  int ret;
+
+  as = c->dwarf.as;
+  a = unw_get_accessors_int (as);
+  arg = c->dwarf.as_arg;
+
+  ip = c->dwarf.ip;
+
+  ret = (*a->access_mem) (as, ip, &w0, 0, arg);
+  if (ret < 0)
+    return ret;
+
+  /* FIXME: distinguish 32bit insn vs 64bit registers.  */
+  if (w0 != 0xd4000001d2801168)
+    return 0;
+
+  return 1;
+
+#else
+  return -UNW_ENOINFO;
+#endif
+}
diff --git a/src/third_party/unwind/dist/src/aarch64/Greg_states_iterate.c b/src/third_party/unwind/dist/src/aarch64/Greg_states_iterate.c
new file mode 100644
index 00000000000..a17dc1b561d
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/Greg_states_iterate.c
@@ -0,0 +1,37 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_reg_states_iterate (unw_cursor_t *cursor,
+			unw_reg_states_callback cb, void *token)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  return dwarf_reg_states_iterate (&c->dwarf, cb, token);
+}
diff --git a/src/third_party/unwind/dist/src/aarch64/Gregs.c b/src/third_party/unwind/dist/src/aarch64/Gregs.c
new file mode 100644
index 00000000000..a8843734459
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/Gregs.c
@@ -0,0 +1,118 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+   Copyright (C) 2013 Linaro Limited
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+HIDDEN int
+tdep_access_reg (struct cursor *c, unw_regnum_t reg, unw_word_t *valp,
+                 int write)
+{
+  dwarf_loc_t loc = DWARF_NULL_LOC;
+  unsigned int mask;
+
+  switch (reg)
+    {
+    case UNW_AARCH64_X0:
+    case UNW_AARCH64_X1:
+    case UNW_AARCH64_X2:
+    case UNW_AARCH64_X3:
+      mask = 1 << reg;
+      if (write)
+        {
+          c->dwarf.eh_args[reg] = *valp;
+          c->dwarf.eh_valid_mask |= mask;
+          return 0;
+        }
+      else if ((c->dwarf.eh_valid_mask & mask) != 0)
+        {
+          *valp = c->dwarf.eh_args[reg];
+          return 0;
+        }
+      else
+        loc = c->dwarf.loc[reg];
+      break;
+
+    case UNW_AARCH64_X30:
+      if (write)
+        c->dwarf.ip = *valp;            /* update the IP cache */
+    case UNW_AARCH64_X4:
+    case UNW_AARCH64_X5:
+    case UNW_AARCH64_X6:
+    case UNW_AARCH64_X7:
+    case UNW_AARCH64_X8:
+    case UNW_AARCH64_X9:
+    case UNW_AARCH64_X10:
+    case UNW_AARCH64_X11:
+    case UNW_AARCH64_X12:
+    case UNW_AARCH64_X13:
+    case UNW_AARCH64_X14:
+    case UNW_AARCH64_X15:
+    case UNW_AARCH64_X16:
+    case UNW_AARCH64_X17:
+    case UNW_AARCH64_X18:
+    case UNW_AARCH64_X19:
+    case UNW_AARCH64_X20:
+    case UNW_AARCH64_X21:
+    case UNW_AARCH64_X22:
+    case UNW_AARCH64_X23:
+    case UNW_AARCH64_X24:
+    case UNW_AARCH64_X25:
+    case UNW_AARCH64_X26:
+    case UNW_AARCH64_X27:
+    case UNW_AARCH64_X28:
+    case UNW_AARCH64_X29:
+    case UNW_AARCH64_PC:
+    case UNW_AARCH64_PSTATE:
+      loc = c->dwarf.loc[reg];
+      break;
+
+    case UNW_AARCH64_SP:
+      if (write)
+        return -UNW_EREADONLYREG;
+      *valp = c->dwarf.cfa;
+      return 0;
+
+    default:
+      Debug (1, "bad register number %u\n", reg);
+      return -UNW_EBADREG;
+    }
+
+  if (write)
+    return dwarf_put (&c->dwarf, loc, *valp);
+  else
+    return dwarf_get (&c->dwarf, loc, valp);
+}
+
+HIDDEN int
+tdep_access_fpreg (struct cursor *c, unw_regnum_t reg, unw_fpreg_t *valp,
+                   int write)
+{
+  dwarf_loc_t loc = c->dwarf.loc[reg];
+  if (write)
+    return dwarf_putfp (&c->dwarf, loc, *valp);
+  else
+    return dwarf_getfp (&c->dwarf, loc, valp);
+}
diff --git a/src/third_party/unwind/dist/src/aarch64/Gresume.c b/src/third_party/unwind/dist/src/aarch64/Gresume.c
new file mode 100644
index 00000000000..3d82739293e
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/Gresume.c
@@ -0,0 +1,198 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2011-2013 Linaro Limited
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "offsets.h"
+
+#ifndef UNW_REMOTE_ONLY
+
+HIDDEN inline int
+aarch64_local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg)
+{
+#ifdef __linux__
+  struct cursor *c = (struct cursor *) cursor;
+  unw_tdep_context_t *uc = c->dwarf.as_arg;
+
+  if (c->sigcontext_format == AARCH64_SCF_NONE)
+    {
+      /* Since there are no signals involved here we restore EH and non scratch
+         registers only.  */
+      unsigned long regs[24];
+      regs[0] = uc->uc_mcontext.regs[0];
+      regs[1] = uc->uc_mcontext.regs[1];
+      regs[2] = uc->uc_mcontext.regs[2];
+      regs[3] = uc->uc_mcontext.regs[3];
+      regs[4] = uc->uc_mcontext.regs[19];
+      regs[5] = uc->uc_mcontext.regs[20];
+      regs[6] = uc->uc_mcontext.regs[21];
+      regs[7] = uc->uc_mcontext.regs[22];
+      regs[8] = uc->uc_mcontext.regs[23];
+      regs[9] = uc->uc_mcontext.regs[24];
+      regs[10] = uc->uc_mcontext.regs[25];
+      regs[11] = uc->uc_mcontext.regs[26];
+      regs[12] = uc->uc_mcontext.regs[27];
+      regs[13] = uc->uc_mcontext.regs[28];
+      regs[14] = uc->uc_mcontext.regs[29]; /* FP */
+      regs[15] = uc->uc_mcontext.regs[30]; /* LR */
+      regs[16] = GET_FPCTX(uc)->vregs[8];
+      regs[17] = GET_FPCTX(uc)->vregs[9];
+      regs[18] = GET_FPCTX(uc)->vregs[10];
+      regs[19] = GET_FPCTX(uc)->vregs[11];
+      regs[20] = GET_FPCTX(uc)->vregs[12];
+      regs[21] = GET_FPCTX(uc)->vregs[13];
+      regs[22] = GET_FPCTX(uc)->vregs[14];
+      regs[23] = GET_FPCTX(uc)->vregs[15];
+      unsigned long sp = uc->uc_mcontext.sp;
+
+      struct regs_overlay {
+        char x[sizeof(regs)];
+      };
+
+      asm volatile (
+        "mov x4, %0\n"
+        "mov x5, %1\n"
+        "ldp x0,  x1,  [x4]\n"
+        "ldp x2,  x3,  [x4,16]\n"
+        "ldp x19, x20, [x4,32]\n"
+        "ldp x21, x22, [x4,48]\n"
+        "ldp x23, x24, [x4,64]\n"
+        "ldp x25, x26, [x4,80]\n"
+        "ldp x27, x28, [x4,96]\n"
+        "ldp x29, x30, [x4,112]\n"
+        "ldp d8, d9,   [x4,128]\n"
+        "ldp d10, d11, [x4,144]\n"
+        "ldp d12, d13, [x4,160]\n"
+        "ldp d14, d15, [x4,176]\n"
+        "mov sp, x5\n"
+        "ret \n"
+        :
+        : "r" (regs),
+          "r" (sp),
+          "m" (*(struct regs_overlay *)regs)
+      );
+    }
+  else
+    {
+      struct sigcontext *sc = (struct sigcontext *) c->sigcontext_addr;
+
+      if (c->dwarf.eh_valid_mask & 0x1) sc->regs[0] = c->dwarf.eh_args[0];
+      if (c->dwarf.eh_valid_mask & 0x2) sc->regs[1] = c->dwarf.eh_args[1];
+      if (c->dwarf.eh_valid_mask & 0x4) sc->regs[2] = c->dwarf.eh_args[2];
+      if (c->dwarf.eh_valid_mask & 0x8) sc->regs[3] = c->dwarf.eh_args[3];
+
+      sc->regs[4] = uc->uc_mcontext.regs[4];
+      sc->regs[5] = uc->uc_mcontext.regs[5];
+      sc->regs[6] = uc->uc_mcontext.regs[6];
+      sc->regs[7] = uc->uc_mcontext.regs[7];
+      sc->regs[8] = uc->uc_mcontext.regs[8];
+      sc->regs[9] = uc->uc_mcontext.regs[9];
+      sc->regs[10] = uc->uc_mcontext.regs[10];
+      sc->regs[11] = uc->uc_mcontext.regs[11];
+      sc->regs[12] = uc->uc_mcontext.regs[12];
+      sc->regs[13] = uc->uc_mcontext.regs[13];
+      sc->regs[14] = uc->uc_mcontext.regs[14];
+      sc->regs[15] = uc->uc_mcontext.regs[15];
+      sc->regs[16] = uc->uc_mcontext.regs[16];
+      sc->regs[17] = uc->uc_mcontext.regs[17];
+      sc->regs[18] = uc->uc_mcontext.regs[18];
+      sc->regs[19] = uc->uc_mcontext.regs[19];
+      sc->regs[20] = uc->uc_mcontext.regs[20];
+      sc->regs[21] = uc->uc_mcontext.regs[21];
+      sc->regs[22] = uc->uc_mcontext.regs[22];
+      sc->regs[23] = uc->uc_mcontext.regs[23];
+      sc->regs[24] = uc->uc_mcontext.regs[24];
+      sc->regs[25] = uc->uc_mcontext.regs[25];
+      sc->regs[26] = uc->uc_mcontext.regs[26];
+      sc->regs[27] = uc->uc_mcontext.regs[27];
+      sc->regs[28] = uc->uc_mcontext.regs[28];
+      sc->regs[29] = uc->uc_mcontext.regs[29];
+      sc->regs[30] = uc->uc_mcontext.regs[30];
+      sc->sp = uc->uc_mcontext.sp;
+      sc->pc = uc->uc_mcontext.pc;
+      sc->pstate = uc->uc_mcontext.pstate;
+
+      asm volatile (
+        "mov sp, %0\n"
+        "ret %1\n"
+        : : "r" (c->sigcontext_sp), "r" (c->sigcontext_pc)
+      );
+   }
+  unreachable();
+#else
+  printf ("%s: implement me\n", __FUNCTION__);
+#endif
+  return -UNW_EINVAL;
+}
+
+#endif /* !UNW_REMOTE_ONLY */
+
+static inline void
+establish_machine_state (struct cursor *c)
+{
+  unw_addr_space_t as = c->dwarf.as;
+  void *arg = c->dwarf.as_arg;
+  unw_fpreg_t fpval;
+  unw_word_t val;
+  int reg;
+
+  Debug (8, "copying out cursor state\n");
+
+  for (reg = 0; reg <= UNW_AARCH64_V31; ++reg)
+    {
+      Debug (16, "copying %s %d\n", unw_regname (reg), reg);
+      if (unw_is_fpreg (reg))
+        {
+          if (tdep_access_fpreg (c, reg, &fpval, 0) >= 0)
+            as->acc.access_fpreg (as, reg, &fpval, 1, arg);
+        }
+      else
+        {
+          if (tdep_access_reg (c, reg, &val, 0) >= 0)
+            as->acc.access_reg (as, reg, &val, 1, arg);
+        }
+    }
+}
+
+int
+unw_resume (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  if (!c->dwarf.ip)
+    {
+      /* This can happen easily when the frame-chain gets truncated
+         due to bad or missing unwind-info.  */
+      Debug (1, "refusing to resume execution at address 0\n");
+      return -UNW_EINVAL;
+    }
+
+  establish_machine_state (c);
+
+  return (*c->dwarf.as->acc.resume) (c->dwarf.as, (unw_cursor_t *) c,
+                                     c->dwarf.as_arg);
+}
diff --git a/src/third_party/unwind/dist/src/aarch64/Gstash_frame.c b/src/third_party/unwind/dist/src/aarch64/Gstash_frame.c
new file mode 100644
index 00000000000..6689af1a61d
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/Gstash_frame.c
@@ -0,0 +1,89 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2010, 2011 by FERMI NATIONAL ACCELERATOR LABORATORY
+   Copyright (C) 2014 CERN and Aalto University
+        Contributed by Filip Nyback
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+HIDDEN void
+tdep_stash_frame (struct dwarf_cursor *d, struct dwarf_reg_state *rs)
+{
+  struct cursor *c = (struct cursor *) dwarf_to_cursor (d);
+  unw_tdep_frame_t *f = &c->frame_info;
+
+  Debug (4, "ip=0x%lx cfa=0x%lx type %d cfa [where=%d val=%ld] cfaoff=%ld"
+         " ra=0x%lx fp [where=%d val=%ld @0x%lx] lr [where=%d val=%ld @0x%lx] "
+         "sp [where=%d val=%ld @0x%lx]\n",
+         d->ip, d->cfa, f->frame_type,
+         rs->reg.where[DWARF_CFA_REG_COLUMN],
+         rs->reg.val[DWARF_CFA_REG_COLUMN],
+         rs->reg.val[DWARF_CFA_OFF_COLUMN],
+         DWARF_GET_LOC(d->loc[rs->ret_addr_column]),
+         rs->reg.where[FP], rs->reg.val[FP], DWARF_GET_LOC(d->loc[FP]),
+         rs->reg.where[LR], rs->reg.val[LR], DWARF_GET_LOC(d->loc[LR]),
+         rs->reg.where[SP], rs->reg.val[SP], DWARF_GET_LOC(d->loc[SP]));
+
+  /* A standard frame is defined as:
+      - CFA is register-relative offset off FP or SP;
+      - Return address is saved in LR;
+      - FP is unsaved or saved at CFA+offset, offset != -1;
+      - LR is unsaved or saved at CFA+offset, offset != -1;
+      - SP is unsaved or saved at CFA+offset, offset != -1.  */
+  if (f->frame_type == UNW_AARCH64_FRAME_OTHER
+      && (rs->reg.where[DWARF_CFA_REG_COLUMN] == DWARF_WHERE_REG)
+      && (rs->reg.val[DWARF_CFA_REG_COLUMN] == FP
+          || rs->reg.val[DWARF_CFA_REG_COLUMN] == SP)
+      && labs(rs->reg.val[DWARF_CFA_OFF_COLUMN]) < (1 << 29)
+      && rs->ret_addr_column == LR
+      && (rs->reg.where[FP] == DWARF_WHERE_UNDEF
+          || rs->reg.where[FP] == DWARF_WHERE_SAME
+          || (rs->reg.where[FP] == DWARF_WHERE_CFAREL
+              && labs(rs->reg.val[FP]) < (1 << 29)
+              && rs->reg.val[FP]+1 != 0))
+      && (rs->reg.where[LR] == DWARF_WHERE_UNDEF
+          || rs->reg.where[LR] == DWARF_WHERE_SAME
+          || (rs->reg.where[LR] == DWARF_WHERE_CFAREL
+              && labs(rs->reg.val[LR]) < (1 << 29)
+              && rs->reg.val[LR]+1 != 0))
+      && (rs->reg.where[SP] == DWARF_WHERE_UNDEF
+          || rs->reg.where[SP] == DWARF_WHERE_SAME
+          || (rs->reg.where[SP] == DWARF_WHERE_CFAREL
+              && labs(rs->reg.val[SP]) < (1 << 29)
+              && rs->reg.val[SP]+1 != 0)))
+  {
+    /* Save information for a standard frame. */
+    f->frame_type = UNW_AARCH64_FRAME_STANDARD;
+    f->cfa_reg_sp = (rs->reg.val[DWARF_CFA_REG_COLUMN] == SP);
+    f->cfa_reg_offset = rs->reg.val[DWARF_CFA_OFF_COLUMN];
+    if (rs->reg.where[FP] == DWARF_WHERE_CFAREL)
+      f->fp_cfa_offset = rs->reg.val[FP];
+    if (rs->reg.where[LR] == DWARF_WHERE_CFAREL)
+      f->lr_cfa_offset = rs->reg.val[LR];
+    if (rs->reg.where[SP] == DWARF_WHERE_CFAREL)
+      f->sp_cfa_offset = rs->reg.val[SP];
+    Debug (4, " standard frame\n");
+  }
+  else
+    Debug (4, " unusual frame\n");
+}
diff --git a/src/third_party/unwind/dist/src/aarch64/Gstep.c b/src/third_party/unwind/dist/src/aarch64/Gstep.c
new file mode 100644
index 00000000000..fdf64a73f33
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/Gstep.c
@@ -0,0 +1,189 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2011-2013 Linaro Limited
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "offsets.h"
+
+/* Recognise PLT entries such as:
+  40ddf0:       b0000570        adrp    x16, 4ba000 <_GLOBAL_OFFSET_TABLE_+0x2a8>
+  40ddf4:       f9433611        ldr     x17, [x16,#1640]
+  40ddf8:       9119a210        add     x16, x16, #0x668
+  40ddfc:       d61f0220        br      x17 */
+static int
+is_plt_entry (struct dwarf_cursor *c)
+{
+  unw_word_t w0, w1;
+  unw_accessors_t *a;
+  int ret;
+
+  a = unw_get_accessors_int (c->as);
+  if ((ret = (*a->access_mem) (c->as, c->ip, &w0, 0, c->as_arg)) < 0
+      || (ret = (*a->access_mem) (c->as, c->ip + 8, &w1, 0, c->as_arg)) < 0)
+    return 0;
+
+  ret = (((w0 & 0xff0000009f000000) == 0xf900000090000000)
+         && ((w1 & 0xffffffffff000000) == 0xd61f022091000000));
+
+  Debug (14, "ip=0x%lx => 0x%016lx 0x%016lx, ret = %d\n", c->ip, w0, w1, ret);
+  return ret;
+}
+
+static int
+aarch64_handle_signal_frame (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  int ret;
+  unw_word_t sc_addr, sp, sp_addr = c->dwarf.cfa;
+  struct dwarf_loc sp_loc = DWARF_LOC (sp_addr, 0);
+
+  if ((ret = dwarf_get (&c->dwarf, sp_loc, &sp)) < 0)
+    return -UNW_EUNSPEC;
+
+  ret = unw_is_signal_frame (cursor);
+  Debug(1, "unw_is_signal_frame()=%d\n", ret);
+
+  /* Save the SP and PC to be able to return execution at this point
+     later in time (unw_resume).  */
+  c->sigcontext_sp = c->dwarf.cfa;
+  c->sigcontext_pc = c->dwarf.ip;
+
+  if (ret)
+    {
+      c->sigcontext_format = AARCH64_SCF_LINUX_RT_SIGFRAME;
+      sc_addr = sp_addr + sizeof (siginfo_t) + LINUX_UC_MCONTEXT_OFF;
+    }
+  else
+    return -UNW_EUNSPEC;
+
+  c->sigcontext_addr = sc_addr;
+  c->frame_info.frame_type = UNW_AARCH64_FRAME_SIGRETURN;
+  c->frame_info.cfa_reg_offset = sc_addr - sp_addr;
+
+  /* Update the dwarf cursor.
+     Set the location of the registers to the corresponding addresses of the
+     uc_mcontext / sigcontext structure contents.  */
+  c->dwarf.loc[UNW_AARCH64_X0]  = DWARF_LOC (sc_addr + LINUX_SC_X0_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_X1]  = DWARF_LOC (sc_addr + LINUX_SC_X1_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_X2]  = DWARF_LOC (sc_addr + LINUX_SC_X2_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_X3]  = DWARF_LOC (sc_addr + LINUX_SC_X3_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_X4]  = DWARF_LOC (sc_addr + LINUX_SC_X4_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_X5]  = DWARF_LOC (sc_addr + LINUX_SC_X5_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_X6]  = DWARF_LOC (sc_addr + LINUX_SC_X6_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_X7]  = DWARF_LOC (sc_addr + LINUX_SC_X7_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_X8]  = DWARF_LOC (sc_addr + LINUX_SC_X8_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_X9]  = DWARF_LOC (sc_addr + LINUX_SC_X9_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_X10] = DWARF_LOC (sc_addr + LINUX_SC_X10_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_X11] = DWARF_LOC (sc_addr + LINUX_SC_X11_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_X12] = DWARF_LOC (sc_addr + LINUX_SC_X12_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_X13] = DWARF_LOC (sc_addr + LINUX_SC_X13_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_X14] = DWARF_LOC (sc_addr + LINUX_SC_X14_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_X15] = DWARF_LOC (sc_addr + LINUX_SC_X15_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_X16] = DWARF_LOC (sc_addr + LINUX_SC_X16_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_X17] = DWARF_LOC (sc_addr + LINUX_SC_X17_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_X18] = DWARF_LOC (sc_addr + LINUX_SC_X18_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_X19] = DWARF_LOC (sc_addr + LINUX_SC_X19_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_X20] = DWARF_LOC (sc_addr + LINUX_SC_X20_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_X21] = DWARF_LOC (sc_addr + LINUX_SC_X21_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_X22] = DWARF_LOC (sc_addr + LINUX_SC_X22_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_X23] = DWARF_LOC (sc_addr + LINUX_SC_X23_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_X24] = DWARF_LOC (sc_addr + LINUX_SC_X24_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_X25] = DWARF_LOC (sc_addr + LINUX_SC_X25_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_X26] = DWARF_LOC (sc_addr + LINUX_SC_X26_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_X27] = DWARF_LOC (sc_addr + LINUX_SC_X27_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_X28] = DWARF_LOC (sc_addr + LINUX_SC_X28_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_X29] = DWARF_LOC (sc_addr + LINUX_SC_X29_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_X30] = DWARF_LOC (sc_addr + LINUX_SC_X30_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_SP]  = DWARF_LOC (sc_addr + LINUX_SC_SP_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_PC]  = DWARF_LOC (sc_addr + LINUX_SC_PC_OFF, 0);
+  c->dwarf.loc[UNW_AARCH64_PSTATE]  = DWARF_LOC (sc_addr + LINUX_SC_PSTATE_OFF, 0);
+
+  /* Set SP/CFA and PC/IP.  */
+  dwarf_get (&c->dwarf, c->dwarf.loc[UNW_AARCH64_SP], &c->dwarf.cfa);
+  dwarf_get (&c->dwarf, c->dwarf.loc[UNW_AARCH64_PC], &c->dwarf.ip);
+
+  c->dwarf.pi_valid = 0;
+  c->dwarf.use_prev_instr = 0;
+
+  return 1;
+}
+
+int
+unw_step (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  int ret;
+
+  Debug (1, "(cursor=%p, ip=0x%016lx, cfa=0x%016lx))\n",
+         c, c->dwarf.ip, c->dwarf.cfa);
+
+  /* Check if this is a signal frame. */
+  if (unw_is_signal_frame (cursor) > 0)
+    return aarch64_handle_signal_frame (cursor);
+
+  ret = dwarf_step (&c->dwarf);
+  Debug(1, "dwarf_step()=%d\n", ret);
+
+  if (unlikely (ret == -UNW_ESTOPUNWIND))
+    return ret;
+
+  if (unlikely (ret < 0))
+    {
+      /* DWARF failed. */
+      if (is_plt_entry (&c->dwarf))
+        {
+          Debug (2, "found plt entry\n");
+          c->frame_info.frame_type = UNW_AARCH64_FRAME_STANDARD;
+        }
+      else
+        {
+          Debug (2, "fallback\n");
+          c->frame_info.frame_type = UNW_AARCH64_FRAME_GUESSED;
+        }
+      /* Use link register (X30). */
+      c->frame_info.cfa_reg_offset = 0;
+      c->frame_info.cfa_reg_sp = 0;
+      c->frame_info.fp_cfa_offset = -1;
+      c->frame_info.lr_cfa_offset = -1;
+      c->frame_info.sp_cfa_offset = -1;
+      c->dwarf.loc[UNW_AARCH64_PC] = c->dwarf.loc[UNW_AARCH64_X30];
+      c->dwarf.loc[UNW_AARCH64_X30] = DWARF_NULL_LOC;
+      if (!DWARF_IS_NULL_LOC (c->dwarf.loc[UNW_AARCH64_PC]))
+        {
+          ret = dwarf_get (&c->dwarf, c->dwarf.loc[UNW_AARCH64_PC], &c->dwarf.ip);
+          if (ret < 0)
+            {
+              Debug (2, "failed to get pc from link register: %d\n", ret);
+              return ret;
+            }
+          Debug (2, "link register (x30) = 0x%016lx\n", c->dwarf.ip);
+          ret = 1;
+        }
+      else
+        c->dwarf.ip = 0;
+    }
+
+  return (c->dwarf.ip == 0) ? 0 : 1;
+}
diff --git a/src/third_party/unwind/dist/src/aarch64/Gtrace.c b/src/third_party/unwind/dist/src/aarch64/Gtrace.c
new file mode 100644
index 00000000000..c67faf0e357
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/Gtrace.c
@@ -0,0 +1,548 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2010, 2011 by FERMI NATIONAL ACCELERATOR LABORATORY
+   Copyright (C) 2014 CERN and Aalto University
+        Contributed by Filip Nyback
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "offsets.h"
+#include <signal.h>
+#include <limits.h>
+
+#pragma weak pthread_once
+#pragma weak pthread_key_create
+#pragma weak pthread_getspecific
+#pragma weak pthread_setspecific
+
+/* Initial hash table size. Table expands by 2 bits (times four). */
+#define HASH_MIN_BITS 14
+
+typedef struct
+{
+  unw_tdep_frame_t *frames;
+  size_t log_size;
+  size_t used;
+  size_t dtor_count;  /* Counts how many times our destructor has already
+                         been called. */
+} unw_trace_cache_t;
+
+static const unw_tdep_frame_t empty_frame = { 0, UNW_AARCH64_FRAME_OTHER, -1, -1, 0, -1, -1, -1 };
+static define_lock (trace_init_lock);
+static pthread_once_t trace_cache_once = PTHREAD_ONCE_INIT;
+static sig_atomic_t trace_cache_once_happen;
+static pthread_key_t trace_cache_key;
+static struct mempool trace_cache_pool;
+static __thread  unw_trace_cache_t *tls_cache;
+static __thread  int tls_cache_destroyed;
+
+/* Free memory for a thread's trace cache. */
+static void
+trace_cache_free (void *arg)
+{
+  unw_trace_cache_t *cache = arg;
+  if (++cache->dtor_count < PTHREAD_DESTRUCTOR_ITERATIONS)
+  {
+    /* Not yet our turn to get destroyed. Re-install ourselves into the key. */
+    pthread_setspecific(trace_cache_key, cache);
+    Debug(5, "delayed freeing cache %p (%zx to go)\n", cache,
+          PTHREAD_DESTRUCTOR_ITERATIONS - cache->dtor_count);
+    return;
+  }
+  tls_cache_destroyed = 1;
+  tls_cache = NULL;
+  munmap (cache->frames, (1u << cache->log_size) * sizeof(unw_tdep_frame_t));
+  mempool_free (&trace_cache_pool, cache);
+  Debug(5, "freed cache %p\n", cache);
+}
+
+/* Initialise frame tracing for threaded use. */
+static void
+trace_cache_init_once (void)
+{
+  pthread_key_create (&trace_cache_key, &trace_cache_free);
+  mempool_init (&trace_cache_pool, sizeof (unw_trace_cache_t), 0);
+  trace_cache_once_happen = 1;
+}
+
+static unw_tdep_frame_t *
+trace_cache_buckets (size_t n)
+{
+  unw_tdep_frame_t *frames;
+  size_t i;
+
+  GET_MEMORY(frames, n * sizeof (unw_tdep_frame_t));
+  if (likely(frames != NULL))
+    for (i = 0; i < n; ++i)
+      frames[i] = empty_frame;
+
+  return frames;
+}
+
+/* Allocate and initialise hash table for frame cache lookups.
+   Returns the cache initialised with (1u << HASH_LOW_BITS) hash
+   buckets, or NULL if there was a memory allocation problem. */
+static unw_trace_cache_t *
+trace_cache_create (void)
+{
+  unw_trace_cache_t *cache;
+
+  if (tls_cache_destroyed)
+  {
+    /* The current thread is in the process of exiting. Don't recreate
+       cache, as we wouldn't have another chance to free it. */
+    Debug(5, "refusing to reallocate cache: "
+             "thread-locals are being deallocated\n");
+    return NULL;
+  }
+
+  if (! (cache = mempool_alloc(&trace_cache_pool)))
+  {
+    Debug(5, "failed to allocate cache\n");
+    return NULL;
+  }
+
+  if (! (cache->frames = trace_cache_buckets(1u << HASH_MIN_BITS)))
+  {
+    Debug(5, "failed to allocate buckets\n");
+    mempool_free(&trace_cache_pool, cache);
+    return NULL;
+  }
+
+  cache->log_size = HASH_MIN_BITS;
+  cache->used = 0;
+  cache->dtor_count = 0;
+  tls_cache_destroyed = 0;  /* Paranoia: should already be 0. */
+  Debug(5, "allocated cache %p\n", cache);
+  return cache;
+}
+
+/* Expand the hash table in the frame cache if possible. This always
+   quadruples the hash size, and clears all previous frame entries. */
+static int
+trace_cache_expand (unw_trace_cache_t *cache)
+{
+  size_t old_size = (1u << cache->log_size);
+  size_t new_log_size = cache->log_size + 2;
+  unw_tdep_frame_t *new_frames = trace_cache_buckets (1u << new_log_size);
+
+  if (unlikely(! new_frames))
+  {
+    Debug(5, "failed to expand cache to 2^%lu buckets\n", new_log_size);
+    return -UNW_ENOMEM;
+  }
+
+  Debug(5, "expanded cache from 2^%lu to 2^%lu buckets\n", cache->log_size, new_log_size);
+  munmap(cache->frames, old_size * sizeof(unw_tdep_frame_t));
+  cache->frames = new_frames;
+  cache->log_size = new_log_size;
+  cache->used = 0;
+  return 0;
+}
+
+static unw_trace_cache_t *
+trace_cache_get_unthreaded (void)
+{
+  unw_trace_cache_t *cache;
+  intrmask_t saved_mask;
+  static unw_trace_cache_t *global_cache = NULL;
+  lock_acquire (&trace_init_lock, saved_mask);
+  if (! global_cache)
+  {
+    mempool_init (&trace_cache_pool, sizeof (unw_trace_cache_t), 0);
+    global_cache = trace_cache_create ();
+  }
+  cache = global_cache;
+  lock_release (&trace_init_lock, saved_mask);
+  Debug(5, "using cache %p\n", cache);
+  return cache;
+}
+
+/* Get the frame cache for the current thread. Create it if there is none. */
+static unw_trace_cache_t *
+trace_cache_get (void)
+{
+  unw_trace_cache_t *cache;
+  if (likely (pthread_once != NULL))
+  {
+    pthread_once(&trace_cache_once, &trace_cache_init_once);
+    if (!trace_cache_once_happen)
+    {
+      return trace_cache_get_unthreaded();
+    }
+    if (! (cache = tls_cache))
+    {
+      cache = trace_cache_create();
+      pthread_setspecific(trace_cache_key, cache);
+      tls_cache = cache;
+    }
+    Debug(5, "using cache %p\n", cache);
+    return cache;
+  }
+  else
+  {
+    return trace_cache_get_unthreaded();
+  }
+}
+
+/* Initialise frame properties for address cache slot F at address
+   PC using current CFA, FP and SP values.  Modifies CURSOR to
+   that location, performs one unw_step(), and fills F with what
+   was discovered about the location.  Returns F.
+
+   FIXME: This probably should tell DWARF handling to never evaluate
+   or use registers other than FP, SP and PC in case there is
+   highly unusual unwind info which uses these creatively. */
+static unw_tdep_frame_t *
+trace_init_addr (unw_tdep_frame_t *f,
+                 unw_cursor_t *cursor,
+                 unw_word_t cfa,
+                 unw_word_t pc,
+                 unw_word_t fp,
+                 unw_word_t sp)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  struct dwarf_cursor *d = &c->dwarf;
+  int ret = -UNW_EINVAL;
+
+  /* Initialise frame properties: unknown, not last. */
+  f->virtual_address = pc;
+  f->frame_type = UNW_AARCH64_FRAME_OTHER;
+  f->last_frame = 0;
+  f->cfa_reg_sp = -1;
+  f->cfa_reg_offset = 0;
+  f->fp_cfa_offset = -1;
+  f->lr_cfa_offset = -1;
+  f->sp_cfa_offset = -1;
+
+  /* Reinitialise cursor to this instruction - but undo next/prev PC
+     adjustment because unw_step will redo it - and force PC, FP and
+     SP into register locations (=~ ucontext we keep), then set
+     their desired values. Then perform the step. */
+  d->ip = pc + d->use_prev_instr;
+  d->cfa = cfa;
+  d->loc[UNW_AARCH64_X29] = DWARF_REG_LOC (d, UNW_AARCH64_X29);
+  d->loc[UNW_AARCH64_SP] = DWARF_REG_LOC (d, UNW_AARCH64_SP);
+  d->loc[UNW_AARCH64_PC] = DWARF_REG_LOC (d, UNW_AARCH64_PC);
+  c->frame_info = *f;
+
+  if (likely(dwarf_put (d, d->loc[UNW_AARCH64_X29], fp) >= 0)
+      && likely(dwarf_put (d, d->loc[UNW_AARCH64_SP], sp) >= 0)
+      && likely(dwarf_put (d, d->loc[UNW_AARCH64_PC], pc) >= 0)
+      && likely((ret = unw_step (cursor)) >= 0))
+    *f = c->frame_info;
+
+  /* If unw_step() stopped voluntarily, remember that, even if it
+     otherwise could not determine anything useful.  This avoids
+     failing trace if we hit frames without unwind info, which is
+     common for the outermost frame (CRT stuff) on many systems.
+     This avoids failing trace in very common circumstances; failing
+     to unw_step() loop wouldn't produce any better result. */
+  if (ret == 0)
+    f->last_frame = -1;
+
+  Debug (3, "frame va %lx type %d last %d cfa %s+%d fp @ cfa%+d lr @ cfa%+d sp @ cfa%+d\n",
+         f->virtual_address, f->frame_type, f->last_frame,
+         f->cfa_reg_sp ? "sp" : "fp", f->cfa_reg_offset,
+         f->fp_cfa_offset, f->lr_cfa_offset, f->sp_cfa_offset);
+
+  return f;
+}
+
+/* Look up and if necessary fill in frame attributes for address PC
+   in CACHE using current CFA, FP and SP values.  Uses CURSOR to
+   perform any unwind steps necessary to fill the cache.  Returns the
+   frame cache slot which describes RIP. */
+static unw_tdep_frame_t *
+trace_lookup (unw_cursor_t *cursor,
+              unw_trace_cache_t *cache,
+              unw_word_t cfa,
+              unw_word_t pc,
+              unw_word_t fp,
+              unw_word_t sp)
+{
+  /* First look up for previously cached information using cache as
+     linear probing hash table with probe step of 1.  Majority of
+     lookups should be completed within few steps, but it is very
+     important the hash table does not fill up, or performance falls
+     off the cliff. */
+  uint64_t i, addr;
+  uint64_t cache_size = 1u << cache->log_size;
+  uint64_t slot = ((pc * 0x9e3779b97f4a7c16) >> 43) & (cache_size-1);
+  unw_tdep_frame_t *frame;
+
+  for (i = 0; i < 16; ++i)
+  {
+    frame = &cache->frames[slot];
+    addr = frame->virtual_address;
+
+    /* Return if we found the address. */
+    if (likely(addr == pc))
+    {
+      Debug (4, "found address after %ld steps\n", i);
+      return frame;
+    }
+
+    /* If slot is empty, reuse it. */
+    if (likely(! addr))
+      break;
+
+    /* Linear probe to next slot candidate, step = 1. */
+    if (++slot >= cache_size)
+      slot -= cache_size;
+  }
+
+  /* If we collided after 16 steps, or if the hash is more than half
+     full, force the hash to expand. Fill the selected slot, whether
+     it's free or collides. Note that hash expansion drops previous
+     contents; further lookups will refill the hash. */
+  Debug (4, "updating slot %lu after %ld steps, replacing 0x%lx\n", slot, i, addr);
+  if (unlikely(addr || cache->used >= cache_size / 2))
+  {
+    if (unlikely(trace_cache_expand (cache) < 0))
+      return NULL;
+
+    cache_size = 1u << cache->log_size;
+    slot = ((pc * 0x9e3779b97f4a7c16) >> 43) & (cache_size-1);
+    frame = &cache->frames[slot];
+    addr = frame->virtual_address;
+  }
+
+  if (! addr)
+    ++cache->used;
+
+  return trace_init_addr (frame, cursor, cfa, pc, fp, sp);
+}
+
+/* Fast stack backtrace for AArch64.
+
+   This is used by backtrace() implementation to accelerate frequent
+   queries for current stack, without any desire to unwind. It fills
+   BUFFER with the call tree from CURSOR upwards for at most SIZE
+   stack levels. The first frame, backtrace itself, is omitted. When
+   called, SIZE should give the maximum number of entries that can be
+   stored into BUFFER. Uses an internal thread-specific cache to
+   accelerate queries.
+
+   The caller should fall back to a unw_step() loop if this function
+   fails by returning -UNW_ESTOPUNWIND, meaning the routine hit a
+   stack frame that is too complex to be traced in the fast path.
+
+   This function is tuned for clients which only need to walk the
+   stack to get the call tree as fast as possible but without any
+   other details, for example profilers sampling the stack thousands
+   to millions of times per second.  The routine handles the most
+   common AArch64 ABI stack layouts: CFA is FP or SP plus/minus
+   constant offset, return address is in LR, and FP, LR and SP are
+   either unchanged or saved on stack at constant offset from the CFA;
+   the signal return frame; and frames without unwind info provided
+   they are at the outermost (final) frame or can conservatively be
+   assumed to be frame-pointer based.
+
+   Any other stack layout will cause the routine to give up. There
+   are only a handful of relatively rarely used functions which do
+   not have a stack in the standard form: vfork, longjmp, setcontext
+   and _dl_runtime_profile on common linux systems for example.
+
+   On success BUFFER and *SIZE reflect the trace progress up to *SIZE
+   stack levels or the outermost frame, which ever is less.  It may
+   stop short of outermost frame if unw_step() loop would also do so,
+   e.g. if there is no more unwind information; this is not reported
+   as an error.
+
+   The function returns a negative value for errors, -UNW_ESTOPUNWIND
+   if tracing stopped because of an unusual frame unwind info.  The
+   BUFFER and *SIZE reflect tracing progress up to the error frame.
+
+   Callers of this function would normally look like this:
+
+     unw_cursor_t     cur;
+     unw_context_t    ctx;
+     void             addrs[128];
+     int              depth = 128;
+     int              ret;
+
+     unw_getcontext(&ctx);
+     unw_init_local(&cur, &ctx);
+     if ((ret = unw_tdep_trace(&cur, addrs, &depth)) < 0)
+     {
+       depth = 0;
+       unw_getcontext(&ctx);
+       unw_init_local(&cur, &ctx);
+       while ((ret = unw_step(&cur)) > 0 && depth < 128)
+       {
+         unw_word_t ip;
+         unw_get_reg(&cur, UNW_REG_IP, &ip);
+         addresses[depth++] = (void *) ip;
+       }
+     }
+*/
+HIDDEN int
+tdep_trace (unw_cursor_t *cursor, void **buffer, int *size)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  struct dwarf_cursor *d = &c->dwarf;
+  unw_trace_cache_t *cache;
+  unw_word_t fp, sp, pc, cfa, lr;
+  int maxdepth = 0;
+  int depth = 0;
+  int ret;
+
+  /* Check input parametres. */
+  if (unlikely(! cursor || ! buffer || ! size || (maxdepth = *size) <= 0))
+    return -UNW_EINVAL;
+
+  Debug (1, "begin ip 0x%lx cfa 0x%lx\n", d->ip, d->cfa);
+
+  /* Tell core dwarf routines to call back to us. */
+  d->stash_frames = 1;
+
+  /* Determine initial register values. These are direct access safe
+     because we know they come from the initial machine context. */
+  pc = d->ip;
+  sp = cfa = d->cfa;
+  ACCESS_MEM_FAST(ret, 0, d, DWARF_GET_LOC(d->loc[UNW_AARCH64_X29]), fp);
+  assert(ret == 0);
+  lr = 0;
+
+  /* Get frame cache. */
+  if (unlikely(! (cache = trace_cache_get())))
+  {
+    Debug (1, "returning %d, cannot get trace cache\n", -UNW_ENOMEM);
+    *size = 0;
+    d->stash_frames = 0;
+    return -UNW_ENOMEM;
+  }
+
+  /* Trace the stack upwards, starting from current RIP.  Adjust
+     the RIP address for previous/next instruction as the main
+     unwinding logic would also do.  We undo this before calling
+     back into unw_step(). */
+  while (depth < maxdepth)
+  {
+    pc -= d->use_prev_instr;
+    Debug (2, "depth %d cfa 0x%lx pc 0x%lx sp 0x%lx fp 0x%lx\n",
+           depth, cfa, pc, sp, fp);
+
+    /* See if we have this address cached.  If not, evaluate enough of
+       the dwarf unwind information to fill the cache line data, or to
+       decide this frame cannot be handled in fast trace mode.  We
+       cache negative results too to prevent unnecessary dwarf parsing
+       for common failures. */
+    unw_tdep_frame_t *f = trace_lookup (cursor, cache, cfa, pc, fp, sp);
+
+    /* If we don't have information for this frame, give up. */
+    if (unlikely(! f))
+    {
+      ret = -UNW_ENOINFO;
+      break;
+    }
+
+    Debug (3, "frame va %lx type %d last %d cfa %s+%d fp @ cfa%+d lr @ cfa%+d sp @ cfa%+d\n",
+           f->virtual_address, f->frame_type, f->last_frame,
+           f->cfa_reg_sp ? "sp" : "fp", f->cfa_reg_offset,
+           f->fp_cfa_offset, f->lr_cfa_offset, f->sp_cfa_offset);
+
+    assert (f->virtual_address == pc);
+
+    /* Stop if this was the last frame.  In particular don't evaluate
+       new register values as it may not be safe - we don't normally
+       run with full validation on, and do not want to - and there's
+       enough bad unwind info floating around that we need to trust
+       what unw_step() previously said, in potentially bogus frames. */
+    if (f->last_frame)
+      break;
+
+    /* Evaluate CFA and registers for the next frame. */
+    switch (f->frame_type)
+    {
+    case UNW_AARCH64_FRAME_GUESSED:
+      /* Fall thru to standard processing after forcing validation. */
+      c->validate = 1;
+
+    case UNW_AARCH64_FRAME_STANDARD:
+      /* Advance standard traceable frame. */
+      cfa = (f->cfa_reg_sp ? sp : fp) + f->cfa_reg_offset;
+      if (likely(f->lr_cfa_offset != -1))
+        ACCESS_MEM_FAST(ret, c->validate, d, cfa + f->lr_cfa_offset, pc);
+      else if (lr != 0)
+      {
+        /* Use the saved link register as the new pc. */
+        pc = lr;
+        lr = 0;
+      }
+      if (likely(ret >= 0) && likely(f->fp_cfa_offset != -1))
+        ACCESS_MEM_FAST(ret, c->validate, d, cfa + f->fp_cfa_offset, fp);
+
+      /* Don't bother reading SP from DWARF, CFA becomes new SP. */
+      sp = cfa;
+
+      /* Next frame needs to back up for unwind info lookup. */
+      d->use_prev_instr = 1;
+      break;
+
+    case UNW_AARCH64_FRAME_SIGRETURN:
+      cfa = cfa + f->cfa_reg_offset; /* cfa now points to ucontext_t.  */
+
+      ACCESS_MEM_FAST(ret, c->validate, d, cfa + LINUX_SC_PC_OFF, pc);
+      if (likely(ret >= 0))
+        ACCESS_MEM_FAST(ret, c->validate, d, cfa + LINUX_SC_X29_OFF, fp);
+      if (likely(ret >= 0))
+        ACCESS_MEM_FAST(ret, c->validate, d, cfa + LINUX_SC_SP_OFF, sp);
+      /* Save the link register here in case we end up in a function that
+         doesn't save the link register in the prologue, e.g. kill. */
+      if (likely(ret >= 0))
+        ACCESS_MEM_FAST(ret, c->validate, d, cfa + LINUX_SC_X30_OFF, lr);
+
+      /* Resume stack at signal restoration point. The stack is not
+         necessarily continuous here, especially with sigaltstack(). */
+      cfa = sp;
+
+      /* Next frame should not back up. */
+      d->use_prev_instr = 0;
+      break;
+
+    default:
+      /* We cannot trace through this frame, give up and tell the
+          caller we had to stop.  Data collected so far may still be
+          useful to the caller, so let it know how far we got.  */
+      ret = -UNW_ESTOPUNWIND;
+      break;
+    }
+
+    Debug (4, "new cfa 0x%lx pc 0x%lx sp 0x%lx fp 0x%lx\n",
+           cfa, pc, sp, fp);
+
+    /* If we failed or ended up somewhere bogus, stop. */
+    if (unlikely(ret < 0 || pc < 0x4000))
+      break;
+
+    /* Record this address in stack trace. We skipped the first address. */
+    buffer[depth++] = (void *) (pc - d->use_prev_instr);
+  }
+
+#if UNW_DEBUG
+  Debug (1, "returning %d, depth %d\n", ret, depth);
+#endif
+  *size = depth;
+  return ret;
+}
diff --git a/src/third_party/unwind/dist/src/aarch64/Lapply_reg_state.c b/src/third_party/unwind/dist/src/aarch64/Lapply_reg_state.c
new file mode 100644
index 00000000000..7ebada480e5
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/Lapply_reg_state.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gapply_reg_state.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/aarch64/Lcreate_addr_space.c b/src/third_party/unwind/dist/src/aarch64/Lcreate_addr_space.c
new file mode 100644
index 00000000000..0f2dc6be901
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/Lcreate_addr_space.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gcreate_addr_space.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/aarch64/Lget_proc_info.c b/src/third_party/unwind/dist/src/aarch64/Lget_proc_info.c
new file mode 100644
index 00000000000..69028b019fc
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/Lget_proc_info.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gget_proc_info.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/aarch64/Lget_save_loc.c b/src/third_party/unwind/dist/src/aarch64/Lget_save_loc.c
new file mode 100644
index 00000000000..9ea048a9076
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/Lget_save_loc.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gget_save_loc.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/aarch64/Lglobal.c b/src/third_party/unwind/dist/src/aarch64/Lglobal.c
new file mode 100644
index 00000000000..6d7b489e14b
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/Lglobal.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gglobal.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/aarch64/Linit.c b/src/third_party/unwind/dist/src/aarch64/Linit.c
new file mode 100644
index 00000000000..e9abfdd46a3
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/Linit.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/aarch64/Linit_local.c b/src/third_party/unwind/dist/src/aarch64/Linit_local.c
new file mode 100644
index 00000000000..68a1687e854
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/Linit_local.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit_local.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/aarch64/Linit_remote.c b/src/third_party/unwind/dist/src/aarch64/Linit_remote.c
new file mode 100644
index 00000000000..58cb04ab7cd
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/Linit_remote.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit_remote.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/aarch64/Lis_signal_frame.c b/src/third_party/unwind/dist/src/aarch64/Lis_signal_frame.c
new file mode 100644
index 00000000000..b9a7c4f51ad
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/Lis_signal_frame.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gis_signal_frame.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/aarch64/Lreg_states_iterate.c b/src/third_party/unwind/dist/src/aarch64/Lreg_states_iterate.c
new file mode 100644
index 00000000000..f1eb1e79dcd
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/Lreg_states_iterate.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Greg_states_iterate.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/aarch64/Lregs.c b/src/third_party/unwind/dist/src/aarch64/Lregs.c
new file mode 100644
index 00000000000..2c9c75cd7d9
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/Lregs.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gregs.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/aarch64/Lresume.c b/src/third_party/unwind/dist/src/aarch64/Lresume.c
new file mode 100644
index 00000000000..41a8cf003de
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/Lresume.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gresume.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/aarch64/Lstash_frame.c b/src/third_party/unwind/dist/src/aarch64/Lstash_frame.c
new file mode 100644
index 00000000000..77587803d08
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/Lstash_frame.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gstash_frame.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/aarch64/Lstep.c b/src/third_party/unwind/dist/src/aarch64/Lstep.c
new file mode 100644
index 00000000000..c1ac3c7547f
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/Lstep.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gstep.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/aarch64/Ltrace.c b/src/third_party/unwind/dist/src/aarch64/Ltrace.c
new file mode 100644
index 00000000000..fcd3f239c9e
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/Ltrace.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gtrace.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/aarch64/getcontext.S b/src/third_party/unwind/dist/src/aarch64/getcontext.S
new file mode 100644
index 00000000000..25ed5b66be7
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/getcontext.S
@@ -0,0 +1,52 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 Google, Inc
+	Contributed by Paul Pluzhnikov <ppluzhnikov@google.com>
+   Copyright (C) 2010 Konstantin Belousov <kib@freebsd.org>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "offsets.h"
+
+/*  int _Uaarch64_getcontext_trace (unw_tdep_context_t *ucp)
+
+  Saves limited machine context in UCP necessary for fast trace. If fast trace
+  fails, caller will have to get the full context.
+*/
+
+	.global _Uaarch64_getcontext_trace
+	.hidden _Uaarch64_getcontext_trace
+	.type _Uaarch64_getcontext_trace, @function
+_Uaarch64_getcontext_trace:
+	.cfi_startproc
+
+	/* Save only FP, SP, PC - exclude this call. */
+	str x29, [x0, #(LINUX_UC_MCONTEXT_OFF + LINUX_SC_X29_OFF)]
+	mov x9, sp
+	str x9, [x0, #(LINUX_UC_MCONTEXT_OFF + LINUX_SC_SP_OFF)]
+	str x30, [x0, #(LINUX_UC_MCONTEXT_OFF + LINUX_SC_PC_OFF)]
+
+	ret
+	.cfi_endproc
+	.size _Uaarch64_getcontext_trace, . - _Uaarch64_getcontext_trace
+
+      /* We do not need executable stack.  */
+      .section        .note.GNU-stack,"",@progbits
diff --git a/src/third_party/unwind/dist/src/aarch64/init.h b/src/third_party/unwind/dist/src/aarch64/init.h
new file mode 100644
index 00000000000..5dab60bb64e
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/init.h
@@ -0,0 +1,126 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+   Copyright (C) 2013 Linaro Limited
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+static inline int
+common_init (struct cursor *c, unsigned use_prev_instr)
+{
+  int ret, i;
+
+  c->dwarf.loc[UNW_AARCH64_X0]  = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_X0);
+  c->dwarf.loc[UNW_AARCH64_X1]  = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_X1);
+  c->dwarf.loc[UNW_AARCH64_X2]  = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_X2);
+  c->dwarf.loc[UNW_AARCH64_X3]  = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_X3);
+  c->dwarf.loc[UNW_AARCH64_X4]  = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_X4);
+  c->dwarf.loc[UNW_AARCH64_X5]  = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_X5);
+  c->dwarf.loc[UNW_AARCH64_X6]  = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_X6);
+  c->dwarf.loc[UNW_AARCH64_X7]  = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_X7);
+  c->dwarf.loc[UNW_AARCH64_X8]  = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_X8);
+  c->dwarf.loc[UNW_AARCH64_X9]  = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_X9);
+  c->dwarf.loc[UNW_AARCH64_X10] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_X10);
+  c->dwarf.loc[UNW_AARCH64_X11] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_X11);
+  c->dwarf.loc[UNW_AARCH64_X12] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_X12);
+  c->dwarf.loc[UNW_AARCH64_X13] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_X13);
+  c->dwarf.loc[UNW_AARCH64_X14] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_X14);
+  c->dwarf.loc[UNW_AARCH64_X15] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_X15);
+  c->dwarf.loc[UNW_AARCH64_X16] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_X16);
+  c->dwarf.loc[UNW_AARCH64_X17] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_X17);
+  c->dwarf.loc[UNW_AARCH64_X18] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_X18);
+  c->dwarf.loc[UNW_AARCH64_X19] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_X19);
+  c->dwarf.loc[UNW_AARCH64_X20] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_X20);
+  c->dwarf.loc[UNW_AARCH64_X21] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_X21);
+  c->dwarf.loc[UNW_AARCH64_X22] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_X22);
+  c->dwarf.loc[UNW_AARCH64_X23] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_X23);
+  c->dwarf.loc[UNW_AARCH64_X24] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_X24);
+  c->dwarf.loc[UNW_AARCH64_X25] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_X25);
+  c->dwarf.loc[UNW_AARCH64_X26] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_X26);
+  c->dwarf.loc[UNW_AARCH64_X27] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_X27);
+  c->dwarf.loc[UNW_AARCH64_X28] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_X28);
+  c->dwarf.loc[UNW_AARCH64_X29] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_X29);
+  c->dwarf.loc[UNW_AARCH64_X30] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_X30);
+  c->dwarf.loc[UNW_AARCH64_SP]  = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_SP);
+  c->dwarf.loc[UNW_AARCH64_PC]  = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_PC);
+  c->dwarf.loc[UNW_AARCH64_PSTATE] = DWARF_REG_LOC (&c->dwarf,
+                                                    UNW_AARCH64_PSTATE);
+  c->dwarf.loc[UNW_AARCH64_V0]  = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_V0);
+  c->dwarf.loc[UNW_AARCH64_V1]  = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_V1);
+  c->dwarf.loc[UNW_AARCH64_V2]  = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_V2);
+  c->dwarf.loc[UNW_AARCH64_V3]  = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_V3);
+  c->dwarf.loc[UNW_AARCH64_V4]  = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_V4);
+  c->dwarf.loc[UNW_AARCH64_V5]  = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_V5);
+  c->dwarf.loc[UNW_AARCH64_V6]  = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_V6);
+  c->dwarf.loc[UNW_AARCH64_V7]  = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_V7);
+  c->dwarf.loc[UNW_AARCH64_V8]  = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_V8);
+  c->dwarf.loc[UNW_AARCH64_V9]  = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_V9);
+  c->dwarf.loc[UNW_AARCH64_V10] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_V10);
+  c->dwarf.loc[UNW_AARCH64_V11] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_V11);
+  c->dwarf.loc[UNW_AARCH64_V12] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_V12);
+  c->dwarf.loc[UNW_AARCH64_V13] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_V13);
+  c->dwarf.loc[UNW_AARCH64_V14] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_V14);
+  c->dwarf.loc[UNW_AARCH64_V15] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_V15);
+  c->dwarf.loc[UNW_AARCH64_V16] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_V16);
+  c->dwarf.loc[UNW_AARCH64_V17] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_V17);
+  c->dwarf.loc[UNW_AARCH64_V18] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_V18);
+  c->dwarf.loc[UNW_AARCH64_V19] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_V19);
+  c->dwarf.loc[UNW_AARCH64_V20] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_V20);
+  c->dwarf.loc[UNW_AARCH64_V21] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_V21);
+  c->dwarf.loc[UNW_AARCH64_V22] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_V22);
+  c->dwarf.loc[UNW_AARCH64_V23] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_V23);
+  c->dwarf.loc[UNW_AARCH64_V24] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_V24);
+  c->dwarf.loc[UNW_AARCH64_V25] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_V25);
+  c->dwarf.loc[UNW_AARCH64_V26] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_V26);
+  c->dwarf.loc[UNW_AARCH64_V27] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_V27);
+  c->dwarf.loc[UNW_AARCH64_V28] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_V28);
+  c->dwarf.loc[UNW_AARCH64_V29] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_V29);
+  c->dwarf.loc[UNW_AARCH64_V30] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_V30);
+  c->dwarf.loc[UNW_AARCH64_V31] = DWARF_REG_LOC (&c->dwarf, UNW_AARCH64_V31);
+
+  for (i = UNW_AARCH64_PSTATE + 1; i < UNW_AARCH64_V0; ++i)
+    c->dwarf.loc[i] = DWARF_NULL_LOC;
+
+  ret = dwarf_get (&c->dwarf, c->dwarf.loc[UNW_AARCH64_PC], &c->dwarf.ip);
+  if (ret < 0)
+    return ret;
+
+  ret = dwarf_get (&c->dwarf, c->dwarf.loc[UNW_AARCH64_SP], &c->dwarf.cfa);
+  if (ret < 0)
+    return ret;
+
+  c->sigcontext_format = AARCH64_SCF_NONE;
+  c->sigcontext_addr = 0;
+  c->sigcontext_sp = 0;
+  c->sigcontext_pc = 0;
+
+  c->dwarf.args_size = 0;
+  c->dwarf.stash_frames = 0;
+  c->dwarf.use_prev_instr = use_prev_instr;
+  c->dwarf.pi_valid = 0;
+  c->dwarf.pi_is_dynamic = 0;
+  c->dwarf.hint = 0;
+  c->dwarf.prev_rs = 0;
+
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/aarch64/is_fpreg.c b/src/third_party/unwind/dist/src/aarch64/is_fpreg.c
new file mode 100644
index 00000000000..2981d27520b
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/is_fpreg.c
@@ -0,0 +1,32 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2013 Linaro Limited
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "libunwind_i.h"
+
+int
+unw_is_fpreg (int regnum)
+{
+  return (regnum >= UNW_AARCH64_V0 && regnum <= UNW_AARCH64_V31);
+}
diff --git a/src/third_party/unwind/dist/src/aarch64/offsets.h b/src/third_party/unwind/dist/src/aarch64/offsets.h
new file mode 100644
index 00000000000..e78251d0a8f
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/offsets.h
@@ -0,0 +1,49 @@
+/* Linux-specific definitions: */
+
+/* Define various structure offsets to simplify cross-compilation.  */
+
+/* Offsets for AArch64 Linux "ucontext_t":  */
+
+#define LINUX_UC_FLAGS_OFF      0x0
+#define LINUX_UC_LINK_OFF       0x8
+#define LINUX_UC_STACK_OFF      0x10
+#define LINUX_UC_SIGMASK_OFF    0x28
+#define LINUX_UC_MCONTEXT_OFF   0xb0
+
+/* Offsets for AArch64 Linux "struct sigcontext":  */
+
+#define LINUX_SC_FAULTADDRESS_OFF       0x00
+#define LINUX_SC_X0_OFF         0x008
+#define LINUX_SC_X1_OFF         0x010
+#define LINUX_SC_X2_OFF         0x018
+#define LINUX_SC_X3_OFF         0x020
+#define LINUX_SC_X4_OFF         0x028
+#define LINUX_SC_X5_OFF         0x030
+#define LINUX_SC_X6_OFF         0x038
+#define LINUX_SC_X7_OFF         0x040
+#define LINUX_SC_X8_OFF         0x048
+#define LINUX_SC_X9_OFF         0x050
+#define LINUX_SC_X10_OFF        0x058
+#define LINUX_SC_X11_OFF        0x060
+#define LINUX_SC_X12_OFF        0x068
+#define LINUX_SC_X13_OFF        0x070
+#define LINUX_SC_X14_OFF        0x078
+#define LINUX_SC_X15_OFF        0x080
+#define LINUX_SC_X16_OFF        0x088
+#define LINUX_SC_X17_OFF        0x090
+#define LINUX_SC_X18_OFF        0x098
+#define LINUX_SC_X19_OFF        0x0a0
+#define LINUX_SC_X20_OFF        0x0a8
+#define LINUX_SC_X21_OFF        0x0b0
+#define LINUX_SC_X22_OFF        0x0b8
+#define LINUX_SC_X23_OFF        0x0c0
+#define LINUX_SC_X24_OFF        0x0c8
+#define LINUX_SC_X25_OFF        0x0d0
+#define LINUX_SC_X26_OFF        0x0d8
+#define LINUX_SC_X27_OFF        0x0e0
+#define LINUX_SC_X28_OFF        0x0e8
+#define LINUX_SC_X29_OFF        0x0f0
+#define LINUX_SC_X30_OFF        0x0f8
+#define LINUX_SC_SP_OFF         0x100
+#define LINUX_SC_PC_OFF         0x108
+#define LINUX_SC_PSTATE_OFF     0x110
diff --git a/src/third_party/unwind/dist/src/aarch64/regname.c b/src/third_party/unwind/dist/src/aarch64/regname.c
new file mode 100644
index 00000000000..0f7a8bdcfbf
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/regname.c
@@ -0,0 +1,106 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+   Copyright (C) 2013 Linaro Limited
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+static const char *const regname[] =
+  {
+    [UNW_AARCH64_X0] = "x0",
+    [UNW_AARCH64_X1] = "x1",
+    [UNW_AARCH64_X2] = "x2",
+    [UNW_AARCH64_X3] = "x3",
+    [UNW_AARCH64_X4] = "x4",
+    [UNW_AARCH64_X5] = "x5",
+    [UNW_AARCH64_X6] = "x6",
+    [UNW_AARCH64_X7] = "x7",
+    [UNW_AARCH64_X8] = "x8",
+    [UNW_AARCH64_X9] = "x9",
+    [UNW_AARCH64_X10] = "x10",
+    [UNW_AARCH64_X11] = "x11",
+    [UNW_AARCH64_X12] = "x12",
+    [UNW_AARCH64_X13] = "x13",
+    [UNW_AARCH64_X14] = "x14",
+    [UNW_AARCH64_X15] = "x15",
+    [UNW_AARCH64_X16] = "ip0",
+    [UNW_AARCH64_X17] = "ip1",
+    [UNW_AARCH64_X18] = "x18",
+    [UNW_AARCH64_X19] = "x19",
+    [UNW_AARCH64_X20] = "x20",
+    [UNW_AARCH64_X21] = "x21",
+    [UNW_AARCH64_X22] = "x22",
+    [UNW_AARCH64_X23] = "x23",
+    [UNW_AARCH64_X24] = "x24",
+    [UNW_AARCH64_X25] = "x25",
+    [UNW_AARCH64_X26] = "x26",
+    [UNW_AARCH64_X27] = "x27",
+    [UNW_AARCH64_X28] = "x28",
+    [UNW_AARCH64_X29] = "fp",
+    [UNW_AARCH64_X30] = "lr",
+    [UNW_AARCH64_SP] = "sp",
+    [UNW_AARCH64_PC] = "pc",
+    [UNW_AARCH64_V0] = "v0",
+    [UNW_AARCH64_V1] = "v1",
+    [UNW_AARCH64_V2] = "v2",
+    [UNW_AARCH64_V3] = "v3",
+    [UNW_AARCH64_V4] = "v4",
+    [UNW_AARCH64_V5] = "v5",
+    [UNW_AARCH64_V6] = "v6",
+    [UNW_AARCH64_V7] = "v7",
+    [UNW_AARCH64_V8] = "v8",
+    [UNW_AARCH64_V9] = "v9",
+    [UNW_AARCH64_V10] = "v10",
+    [UNW_AARCH64_V11] = "v11",
+    [UNW_AARCH64_V12] = "v12",
+    [UNW_AARCH64_V13] = "v13",
+    [UNW_AARCH64_V14] = "v14",
+    [UNW_AARCH64_V15] = "v15",
+    [UNW_AARCH64_V16] = "v16",
+    [UNW_AARCH64_V17] = "v17",
+    [UNW_AARCH64_V18] = "v18",
+    [UNW_AARCH64_V19] = "v19",
+    [UNW_AARCH64_V20] = "v20",
+    [UNW_AARCH64_V21] = "v21",
+    [UNW_AARCH64_V22] = "v22",
+    [UNW_AARCH64_V23] = "v23",
+    [UNW_AARCH64_V24] = "v24",
+    [UNW_AARCH64_V25] = "v25",
+    [UNW_AARCH64_V26] = "v26",
+    [UNW_AARCH64_V27] = "v27",
+    [UNW_AARCH64_V28] = "v28",
+    [UNW_AARCH64_V29] = "v29",
+    [UNW_AARCH64_V30] = "v30",
+    [UNW_AARCH64_V31] = "v31",
+    [UNW_AARCH64_FPSR] = "fpsr",
+    [UNW_AARCH64_FPCR] = "fpcr",
+  };
+
+const char *
+unw_regname (unw_regnum_t reg)
+{
+  if (reg < (unw_regnum_t) ARRAY_SIZE (regname) && regname[reg] != NULL)
+    return regname[reg];
+  else
+    return "???";
+}
diff --git a/src/third_party/unwind/dist/src/aarch64/siglongjmp.S b/src/third_party/unwind/dist/src/aarch64/siglongjmp.S
new file mode 100644
index 00000000000..9985c4b4aab
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/siglongjmp.S
@@ -0,0 +1,12 @@
+	/* Dummy implementation for now.  */
+
+	.global _UI_siglongjmp_cont
+	.global _UI_longjmp_cont
+
+_UI_siglongjmp_cont:
+_UI_longjmp_cont:
+	ret
+#ifdef __linux__
+ /* We do not need executable stack.  */
+ .section  .note.GNU-stack,"",%progbits
+#endif
diff --git a/src/third_party/unwind/dist/src/aarch64/unwind_i.h b/src/third_party/unwind/dist/src/aarch64/unwind_i.h
new file mode 100644
index 00000000000..db7e29dd722
--- /dev/null
+++ b/src/third_party/unwind/dist/src/aarch64/unwind_i.h
@@ -0,0 +1,64 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2013 Linaro Limited
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef unwind_i_h
+#define unwind_i_h
+
+#include <stdint.h>
+
+#include <libunwind-aarch64.h>
+
+#include "libunwind_i.h"
+
+/* DWARF column numbers for AArch64: */
+#define X29     29
+#define FP      29
+#define X30     30
+#define LR      30
+#define SP      31
+
+#define aarch64_lock                    UNW_OBJ(lock)
+#define aarch64_local_resume            UNW_OBJ(local_resume)
+#define aarch64_local_addr_space_init   UNW_OBJ(local_addr_space_init)
+
+extern void aarch64_local_addr_space_init (void);
+extern int aarch64_local_resume (unw_addr_space_t as, unw_cursor_t *cursor,
+                             void *arg);
+
+/* By-pass calls to access_mem() when known to be safe. */
+#ifdef UNW_LOCAL_ONLY
+# undef ACCESS_MEM_FAST
+# define ACCESS_MEM_FAST(ret,validate,cur,addr,to)                     \
+  do {                                                                 \
+    if (unlikely(validate))                                            \
+      (ret) = dwarf_get ((cur), DWARF_MEM_LOC ((cur), (addr)), &(to)); \
+    else                                                               \
+      (ret) = 0, (to) = *(unw_word_t *)(addr);                         \
+  } while (0)
+#endif
+
+#define GET_FPCTX(uc) ((unw_fpsimd_context_t *)(&uc->uc_mcontext.__reserved))
+
+#endif /* unwind_i_h */
diff --git a/src/third_party/unwind/dist/src/arm/Gapply_reg_state.c b/src/third_party/unwind/dist/src/arm/Gapply_reg_state.c
new file mode 100644
index 00000000000..82f056da67e
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Gapply_reg_state.c
@@ -0,0 +1,37 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_apply_reg_state (unw_cursor_t *cursor,
+		     void *reg_states_data)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  return dwarf_apply_reg_state (&c->dwarf, (dwarf_reg_state_t *)reg_states_data);
+}
diff --git a/src/third_party/unwind/dist/src/arm/Gcreate_addr_space.c b/src/third_party/unwind/dist/src/arm/Gcreate_addr_space.c
new file mode 100644
index 00000000000..7b2d6bacfdc
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Gcreate_addr_space.c
@@ -0,0 +1,60 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <stdlib.h>
+
+#include "unwind_i.h"
+
+unw_addr_space_t
+unw_create_addr_space (unw_accessors_t *a, int byte_order)
+{
+#ifdef UNW_LOCAL_ONLY
+  return NULL;
+#else
+  unw_addr_space_t as;
+
+  /*
+   * ARM supports little-endian and big-endian.
+   */
+  if (byte_order != 0 && byte_order != __LITTLE_ENDIAN
+      && byte_order != __BIG_ENDIAN)
+    return NULL;
+
+  as = malloc (sizeof (*as));
+  if (!as)
+    return NULL;
+
+  memset (as, 0, sizeof (*as));
+
+  as->acc = *a;
+
+  /* Default to little-endian for ARM.  */
+  if (byte_order == 0 || byte_order == __LITTLE_ENDIAN)
+    as->big_endian = 0;
+  else
+    as->big_endian = 1;
+  
+  return as;
+#endif
+}
diff --git a/src/third_party/unwind/dist/src/arm/Gex_tables.c b/src/third_party/unwind/dist/src/arm/Gex_tables.c
new file mode 100644
index 00000000000..d6573a65e0c
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Gex_tables.c
@@ -0,0 +1,549 @@
+/* libunwind - a platform-independent unwind library
+   Copyright 2011 Linaro Limited
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* This file contains functionality for parsing and interpreting the ARM
+specific unwind information.  Documentation about the exception handling
+ABI for the ARM architecture can be found at:
+http://infocenter.arm.com/help/topic/com.arm.doc.ihi0038a/IHI0038A_ehabi.pdf
+*/ 
+
+#include "libunwind_i.h"
+
+#define ARM_EXBUF_START(x)      (((x) >> 4) & 0x0f)
+#define ARM_EXBUF_COUNT(x)      ((x) & 0x0f)
+#define ARM_EXBUF_END(x)        (ARM_EXBUF_START(x) + ARM_EXBUF_COUNT(x))
+
+#define ARM_EXIDX_CANT_UNWIND   0x00000001
+#define ARM_EXIDX_COMPACT       0x80000000
+
+#define ARM_EXTBL_OP_FINISH     0xb0
+
+enum arm_exbuf_cmd_flags {
+  ARM_EXIDX_VFP_SHIFT_16 = 1 << 16,
+  ARM_EXIDX_VFP_DOUBLE = 1 << 17,
+};
+
+struct arm_cb_data
+  {
+    /* in: */
+    unw_word_t ip;             /* instruction-pointer we're looking for */
+    unw_proc_info_t *pi;       /* proc-info pointer */
+    /* out: */
+    unw_dyn_info_t di;         /* info about the ARM exidx segment */
+  };
+
+static inline uint32_t CONST_ATTR
+prel31_read (uint32_t prel31)
+{
+  return ((int32_t)prel31 << 1) >> 1;
+}
+
+static inline int
+prel31_to_addr (unw_addr_space_t as, void *arg, unw_word_t prel31,
+                unw_word_t *val)
+{
+  unw_word_t offset;
+
+  if ((*as->acc.access_mem)(as, prel31, &offset, 0, arg) < 0)
+    return -UNW_EINVAL;
+
+  offset = ((long)offset << 1) >> 1;
+  *val = prel31 + offset;
+
+  return 0;
+}
+
+/**
+ * Applies the given command onto the new state to the given dwarf_cursor.
+ */
+HIDDEN int
+arm_exidx_apply_cmd (struct arm_exbuf_data *edata, struct dwarf_cursor *c)
+{
+  int ret = 0;
+  unsigned i;
+
+  switch (edata->cmd)
+    {
+    case ARM_EXIDX_CMD_FINISH:
+      /* Set LR to PC if not set already.  */
+      if (DWARF_IS_NULL_LOC (c->loc[UNW_ARM_R15]))
+        c->loc[UNW_ARM_R15] = c->loc[UNW_ARM_R14];
+      /* Set IP.  */
+      dwarf_get (c, c->loc[UNW_ARM_R15], &c->ip);
+      break;
+    case ARM_EXIDX_CMD_DATA_PUSH:
+      Debug (2, "vsp = vsp - %d\n", edata->data);
+      c->cfa -= edata->data;
+      break;
+    case ARM_EXIDX_CMD_DATA_POP:
+      Debug (2, "vsp = vsp + %d\n", edata->data);
+      c->cfa += edata->data;
+      break;
+    case ARM_EXIDX_CMD_REG_POP:
+      for (i = 0; i < 16; i++)
+        if (edata->data & (1 << i))
+          {
+            Debug (2, "pop {r%d}\n", i);
+            c->loc[UNW_ARM_R0 + i] = DWARF_LOC (c->cfa, 0);
+            c->cfa += 4;
+          }
+      /* Set cfa in case the SP got popped. */
+      if (edata->data & (1 << 13))
+        dwarf_get (c, c->loc[UNW_ARM_R13], &c->cfa);
+      break;
+    case ARM_EXIDX_CMD_REG_TO_SP:
+      assert (edata->data < 16);
+      Debug (2, "vsp = r%d\n", edata->data);
+      c->loc[UNW_ARM_R13] = c->loc[UNW_ARM_R0 + edata->data];
+      dwarf_get (c, c->loc[UNW_ARM_R13], &c->cfa);
+      break;
+    case ARM_EXIDX_CMD_VFP_POP:
+      /* Skip VFP registers, but be sure to adjust stack */
+      for (i = ARM_EXBUF_START (edata->data); i <= ARM_EXBUF_END (edata->data);
+           i++)
+        c->cfa += 8;
+      if (!(edata->data & ARM_EXIDX_VFP_DOUBLE))
+        c->cfa += 4;
+      break;
+    case ARM_EXIDX_CMD_WREG_POP:
+      for (i = ARM_EXBUF_START (edata->data); i <= ARM_EXBUF_END (edata->data);
+           i++)
+        c->cfa += 8;
+      break;
+    case ARM_EXIDX_CMD_WCGR_POP:
+      for (i = 0; i < 4; i++)
+        if (edata->data & (1 << i))
+          c->cfa += 4;
+      break;
+    case ARM_EXIDX_CMD_REFUSED:
+    case ARM_EXIDX_CMD_RESERVED:
+      ret = -1;
+      break;
+    }
+  return ret;
+}
+
+/**
+ * Decodes the given unwind instructions into arm_exbuf_data and calls
+ * arm_exidx_apply_cmd that applies the command onto the dwarf_cursor.
+ */
+HIDDEN int
+arm_exidx_decode (const uint8_t *buf, uint8_t len, struct dwarf_cursor *c)
+{
+#define READ_OP() *buf++
+  const uint8_t *end = buf + len;
+  int ret;
+  struct arm_exbuf_data edata;
+
+  assert(buf != NULL);
+  assert(len > 0);
+
+  while (buf < end)
+    {
+      uint8_t op = READ_OP ();
+      if ((op & 0xc0) == 0x00)
+        {
+          edata.cmd = ARM_EXIDX_CMD_DATA_POP;
+          edata.data = (((int)op & 0x3f) << 2) + 4;
+        }
+      else if ((op & 0xc0) == 0x40)
+        {
+          edata.cmd = ARM_EXIDX_CMD_DATA_PUSH;
+          edata.data = (((int)op & 0x3f) << 2) + 4;
+        }
+      else if ((op & 0xf0) == 0x80)
+        {
+          uint8_t op2 = READ_OP ();
+          if (op == 0x80 && op2 == 0x00)
+            edata.cmd = ARM_EXIDX_CMD_REFUSED;
+          else
+            {
+              edata.cmd = ARM_EXIDX_CMD_REG_POP;
+              edata.data = ((op & 0xf) << 8) | op2;
+              edata.data = edata.data << 4;
+            }
+        }
+      else if ((op & 0xf0) == 0x90)
+        {
+          if (op == 0x9d || op == 0x9f)
+            edata.cmd = ARM_EXIDX_CMD_RESERVED;
+          else
+            {
+              edata.cmd = ARM_EXIDX_CMD_REG_TO_SP;
+              edata.data = op & 0x0f;
+            }
+        }
+      else if ((op & 0xf0) == 0xa0)
+        {
+          unsigned end = (op & 0x07);
+          edata.data = (1 << (end + 1)) - 1;
+          edata.data = edata.data << 4;
+          if (op & 0x08)
+            edata.data |= 1 << 14;
+          edata.cmd = ARM_EXIDX_CMD_REG_POP;
+        }
+      else if (op == ARM_EXTBL_OP_FINISH)
+        {
+          edata.cmd = ARM_EXIDX_CMD_FINISH;
+          buf = end;
+        }
+      else if (op == 0xb1)
+        {
+          uint8_t op2 = READ_OP ();
+          if (op2 == 0 || (op2 & 0xf0))
+            edata.cmd = ARM_EXIDX_CMD_RESERVED;
+          else
+            {
+              edata.cmd = ARM_EXIDX_CMD_REG_POP;
+              edata.data = op2 & 0x0f;
+            }
+        }
+      else if (op == 0xb2)
+        {
+          uint32_t offset = 0;
+          uint8_t byte, shift = 0;
+          do
+            {
+              byte = READ_OP ();
+              offset |= (byte & 0x7f) << shift;
+              shift += 7;
+            }
+          while (byte & 0x80);
+          edata.data = offset * 4 + 0x204;
+          edata.cmd = ARM_EXIDX_CMD_DATA_POP;
+        }
+      else if (op == 0xb3 || op == 0xc8 || op == 0xc9)
+        {
+          edata.cmd = ARM_EXIDX_CMD_VFP_POP;
+          edata.data = READ_OP ();
+          if (op == 0xc8)
+            edata.data |= ARM_EXIDX_VFP_SHIFT_16;
+          if (op != 0xb3)
+            edata.data |= ARM_EXIDX_VFP_DOUBLE;
+        }
+      else if ((op & 0xf8) == 0xb8 || (op & 0xf8) == 0xd0)
+        {
+          edata.cmd = ARM_EXIDX_CMD_VFP_POP;
+          edata.data = 0x80 | (op & 0x07);
+          if ((op & 0xf8) == 0xd0)
+            edata.data |= ARM_EXIDX_VFP_DOUBLE;
+        }
+      else if (op >= 0xc0 && op <= 0xc5)
+        {
+          edata.cmd = ARM_EXIDX_CMD_WREG_POP;
+          edata.data = 0xa0 | (op & 0x07);
+        }
+      else if (op == 0xc6)
+        {
+          edata.cmd = ARM_EXIDX_CMD_WREG_POP;
+          edata.data = READ_OP ();
+        }
+      else if (op == 0xc7)
+        {
+          uint8_t op2 = READ_OP ();
+          if (op2 == 0 || (op2 & 0xf0))
+            edata.cmd = ARM_EXIDX_CMD_RESERVED;
+          else
+            {
+              edata.cmd = ARM_EXIDX_CMD_WCGR_POP;
+              edata.data = op2 & 0x0f;
+            }
+        }
+      else
+        edata.cmd = ARM_EXIDX_CMD_RESERVED;
+
+      ret = arm_exidx_apply_cmd (&edata, c);
+      if (ret < 0)
+        return ret;
+    }
+  return 0;
+}
+
+/**
+ * Reads the entry from the given cursor and extracts the unwind instructions
+ * into buf.  Returns the number of the extracted unwind insns or 
+ * -UNW_ESTOPUNWIND if the special bit pattern ARM_EXIDX_CANT_UNWIND (0x1) was
+ * found.
+ */
+HIDDEN int
+arm_exidx_extract (struct dwarf_cursor *c, uint8_t *buf)
+{
+  int nbuf = 0;
+  unw_word_t entry = (unw_word_t) c->pi.unwind_info;
+  unw_word_t addr;
+  uint32_t data;
+
+  /* An ARM unwind entry consists of a prel31 offset to the start of a
+     function followed by 31bits of data: 
+       * if set to 0x1: the function cannot be unwound (EXIDX_CANTUNWIND)
+       * if bit 31 is one: this is a table entry itself (ARM_EXIDX_COMPACT)
+       * if bit 31 is zero: this is a prel31 offset of the start of the
+         table entry for this function  */
+  if (prel31_to_addr(c->as, c->as_arg, entry, &addr) < 0)
+    return -UNW_EINVAL;
+
+  if ((*c->as->acc.access_mem)(c->as, entry + 4, &data, 0, c->as_arg) < 0)
+    return -UNW_EINVAL;
+
+  if (data == ARM_EXIDX_CANT_UNWIND)
+    {
+      Debug (2, "0x1 [can't unwind]\n");
+      nbuf = -UNW_ESTOPUNWIND;
+    }
+  else if (data & ARM_EXIDX_COMPACT)
+    {
+      Debug (2, "%p compact model %d [%8.8x]\n", (void *)addr,
+             (data >> 24) & 0x7f, data);
+      buf[nbuf++] = data >> 16;
+      buf[nbuf++] = data >> 8;
+      buf[nbuf++] = data;
+    }
+  else
+    {
+      unw_word_t extbl_data;
+      unsigned int n_table_words = 0;
+
+      if (prel31_to_addr(c->as, c->as_arg, entry + 4, &extbl_data) < 0)
+        return -UNW_EINVAL;
+
+      if ((*c->as->acc.access_mem)(c->as, extbl_data, &data, 0, c->as_arg) < 0)
+        return -UNW_EINVAL;
+
+      if (data & ARM_EXIDX_COMPACT)
+        {
+          int pers = (data >> 24) & 0x0f;
+          Debug (2, "%p compact model %d [%8.8x]\n", (void *)addr, pers, data);
+          if (pers == 1 || pers == 2)
+            {
+              n_table_words = (data >> 16) & 0xff;
+              extbl_data += 4;
+            }
+          else
+            buf[nbuf++] = data >> 16;
+          buf[nbuf++] = data >> 8;
+          buf[nbuf++] = data;
+        }
+      else
+        {
+          unw_word_t pers;
+          if (prel31_to_addr (c->as, c->as_arg, extbl_data, &pers) < 0)
+            return -UNW_EINVAL;
+          Debug (2, "%p Personality routine: %8p\n", (void *)addr,
+                 (void *)pers);
+          if ((*c->as->acc.access_mem)(c->as, extbl_data + 4, &data, 0,
+                                       c->as_arg) < 0)
+            return -UNW_EINVAL;
+          n_table_words = data >> 24;
+          buf[nbuf++] = data >> 16;
+          buf[nbuf++] = data >> 8;
+          buf[nbuf++] = data;
+          extbl_data += 8;
+        }
+      assert (n_table_words <= 5);
+      unsigned j;
+      for (j = 0; j < n_table_words; j++)
+        {
+          if ((*c->as->acc.access_mem)(c->as, extbl_data, &data, 0,
+                                       c->as_arg) < 0)
+            return -UNW_EINVAL;
+          extbl_data += 4;
+          buf[nbuf++] = data >> 24;
+          buf[nbuf++] = data >> 16;
+          buf[nbuf++] = data >> 8;
+          buf[nbuf++] = data >> 0;
+        }
+    }
+
+  if (nbuf > 0 && buf[nbuf - 1] != ARM_EXTBL_OP_FINISH)
+    buf[nbuf++] = ARM_EXTBL_OP_FINISH;
+
+  return nbuf;
+}
+
+int
+arm_search_unwind_table (unw_addr_space_t as, unw_word_t ip,
+			 unw_dyn_info_t *di, unw_proc_info_t *pi,
+			 int need_unwind_info, void *arg)
+{
+  /* The .ARM.exidx section contains a sorted list of key-value pairs -
+     the unwind entries.  The 'key' is a prel31 offset to the start of a
+     function.  We binary search this section in order to find the
+     appropriate unwind entry.  */
+  unw_word_t first = di->u.rti.table_data;
+  unw_word_t last = di->u.rti.table_data + di->u.rti.table_len - 8;
+  unw_word_t entry, val;
+
+  if (prel31_to_addr (as, arg, first, &val) < 0 || ip < val)
+    return -UNW_ENOINFO;
+
+  if (prel31_to_addr (as, arg, last, &val) < 0)
+    return -UNW_EINVAL;
+
+  if (ip >= val)
+    {
+      entry = last;
+
+      if (prel31_to_addr (as, arg, last, &pi->start_ip) < 0)
+	return -UNW_EINVAL;
+
+      pi->end_ip = di->end_ip -1;
+    }
+  else
+    {
+      while (first < last - 8)
+	{
+	  entry = first + (((last - first) / 8 + 1) >> 1) * 8;
+
+	  if (prel31_to_addr (as, arg, entry, &val) < 0)
+	    return -UNW_EINVAL;
+
+	  if (ip < val)
+	    last = entry;
+	  else
+	    first = entry;
+	}
+
+      entry = first;
+
+      if (prel31_to_addr (as, arg, entry, &pi->start_ip) < 0)
+	return -UNW_EINVAL;
+
+      if (prel31_to_addr (as, arg, entry + 8, &pi->end_ip) < 0)
+	return -UNW_EINVAL;
+
+      pi->end_ip--;
+    }
+
+  if (need_unwind_info)
+    {
+      pi->unwind_info_size = 8;
+      pi->unwind_info = (void *) entry;
+      pi->format = UNW_INFO_FORMAT_ARM_EXIDX;
+    }
+  return 0;
+}
+
+int
+tdep_search_unwind_table (unw_addr_space_t as, unw_word_t ip,
+                             unw_dyn_info_t *di, unw_proc_info_t *pi,
+                             int need_unwind_info, void *arg)
+{
+  if (UNW_TRY_METHOD (UNW_ARM_METHOD_EXIDX)
+      && di->format == UNW_INFO_FORMAT_ARM_EXIDX)
+    return arm_search_unwind_table (as, ip, di, pi, need_unwind_info, arg);
+  else if (UNW_TRY_METHOD(UNW_ARM_METHOD_DWARF)
+           && di->format != UNW_INFO_FORMAT_ARM_EXIDX)
+    return dwarf_search_unwind_table (as, ip, di, pi, need_unwind_info, arg);
+
+  return -UNW_ENOINFO; 
+}
+
+#ifndef UNW_REMOTE_ONLY
+/**
+ * Callback to dl_iterate_phdr to find infos about the ARM exidx segment.
+ */
+static int
+arm_phdr_cb (struct dl_phdr_info *info, size_t size, void *data)
+{
+  struct arm_cb_data *cb_data = data;
+  const Elf_W(Phdr) *p_text = NULL;
+  const Elf_W(Phdr) *p_arm_exidx = NULL;
+  const Elf_W(Phdr) *phdr = info->dlpi_phdr;
+  long n;
+
+  for (n = info->dlpi_phnum; --n >= 0; phdr++)
+    {
+      switch (phdr->p_type)
+        {
+        case PT_LOAD:
+          if (cb_data->ip >= phdr->p_vaddr + info->dlpi_addr &&
+              cb_data->ip < phdr->p_vaddr + info->dlpi_addr + phdr->p_memsz)
+            p_text = phdr;
+          break;
+
+        case PT_ARM_EXIDX:
+          p_arm_exidx = phdr;
+          break;
+
+        default:
+          break;
+        }
+    }
+
+  if (p_text && p_arm_exidx)
+    {
+      cb_data->di.format = UNW_INFO_FORMAT_ARM_EXIDX;
+      cb_data->di.start_ip = p_text->p_vaddr + info->dlpi_addr;
+      cb_data->di.end_ip = cb_data->di.start_ip + p_text->p_memsz;
+      cb_data->di.u.rti.name_ptr = (unw_word_t) info->dlpi_name;
+      cb_data->di.u.rti.table_data = p_arm_exidx->p_vaddr + info->dlpi_addr;
+      cb_data->di.u.rti.table_len = p_arm_exidx->p_memsz;
+      return 1;
+    }
+
+  return 0;
+}
+
+HIDDEN int
+arm_find_proc_info (unw_addr_space_t as, unw_word_t ip,
+                    unw_proc_info_t *pi, int need_unwind_info, void *arg)
+{
+  int ret = -1;
+  intrmask_t saved_mask;
+
+  Debug (14, "looking for IP=0x%lx\n", (long) ip);
+
+  if (UNW_TRY_METHOD(UNW_ARM_METHOD_DWARF))
+    ret = dwarf_find_proc_info (as, ip, pi, need_unwind_info, arg);
+
+  if (ret < 0 && UNW_TRY_METHOD (UNW_ARM_METHOD_EXIDX))
+    {
+      struct arm_cb_data cb_data;
+
+      memset (&cb_data, 0, sizeof (cb_data));
+      cb_data.ip = ip;
+      cb_data.pi = pi;
+      cb_data.di.format = -1;
+
+      SIGPROCMASK (SIG_SETMASK, &unwi_full_mask, &saved_mask);
+      ret = dl_iterate_phdr (arm_phdr_cb, &cb_data);
+      SIGPROCMASK (SIG_SETMASK, &saved_mask, NULL);
+
+      if (cb_data.di.format != -1)
+        ret = arm_search_unwind_table (as, ip, &cb_data.di, pi,
+				       need_unwind_info, arg);
+      else
+        ret = -UNW_ENOINFO;
+    }
+
+  return ret;
+}
+
+HIDDEN void
+arm_put_unwind_info (unw_addr_space_t as, unw_proc_info_t *proc_info, void *arg)
+{
+  /* it's a no-op */
+}
+#endif /* !UNW_REMOTE_ONLY */
+
diff --git a/src/third_party/unwind/dist/src/arm/Gget_proc_info.c b/src/third_party/unwind/dist/src/arm/Gget_proc_info.c
new file mode 100644
index 00000000000..4051a10766e
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Gget_proc_info.c
@@ -0,0 +1,41 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_get_proc_info (unw_cursor_t *cursor, unw_proc_info_t *pi)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  int ret;
+
+  /* We can only unwind using Dwarf into on ARM: return failure code
+     if it's not present.  */
+  ret = dwarf_make_proc_info (&c->dwarf);
+  if (ret < 0)
+    return ret;
+
+  *pi = c->dwarf.pi;
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/arm/Gget_save_loc.c b/src/third_party/unwind/dist/src/arm/Gget_save_loc.c
new file mode 100644
index 00000000000..9fb070489cd
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Gget_save_loc.c
@@ -0,0 +1,81 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_get_save_loc (unw_cursor_t *cursor, int reg, unw_save_loc_t *sloc)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  dwarf_loc_t loc;
+
+  loc = DWARF_NULL_LOC;         /* default to "not saved" */
+
+  switch (reg)
+    {
+    case UNW_ARM_R0:
+    case UNW_ARM_R1:
+    case UNW_ARM_R2:
+    case UNW_ARM_R3:
+    case UNW_ARM_R4:
+    case UNW_ARM_R5:
+    case UNW_ARM_R6:
+    case UNW_ARM_R7:
+    case UNW_ARM_R8:
+    case UNW_ARM_R9:
+    case UNW_ARM_R10:
+    case UNW_ARM_R11:
+    case UNW_ARM_R12:
+    case UNW_ARM_R13:
+    case UNW_ARM_R14:
+    case UNW_ARM_R15:
+      loc = c->dwarf.loc[reg - UNW_ARM_R0];
+      break;
+
+    default:
+      break;
+    }
+
+  memset (sloc, 0, sizeof (*sloc));
+
+  if (DWARF_IS_NULL_LOC (loc))
+    {
+      sloc->type = UNW_SLT_NONE;
+      return 0;
+    }
+
+#if !defined(UNW_LOCAL_ONLY)
+  if (DWARF_IS_REG_LOC (loc))
+    {
+      sloc->type = UNW_SLT_REG;
+      sloc->u.regnum = DWARF_GET_LOC (loc);
+    }
+  else
+#endif
+    {
+      sloc->type = UNW_SLT_MEMORY;
+      sloc->u.addr = DWARF_GET_LOC (loc);
+    }
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/arm/Gglobal.c b/src/third_party/unwind/dist/src/arm/Gglobal.c
new file mode 100644
index 00000000000..7b93fbd89a1
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Gglobal.c
@@ -0,0 +1,65 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "dwarf_i.h"
+
+HIDDEN define_lock (arm_lock);
+HIDDEN int tdep_init_done;
+
+/* Unwinding methods to use. See UNW_METHOD_ enums */
+HIDDEN int unwi_unwind_method = UNW_ARM_METHOD_ALL;
+
+HIDDEN void
+tdep_init (void)
+{
+  intrmask_t saved_mask;
+
+  sigfillset (&unwi_full_mask);
+
+  lock_acquire (&arm_lock, saved_mask);
+  {
+    if (tdep_init_done)
+      /* another thread else beat us to it... */
+      goto out;
+
+    /* read ARM unwind method setting */
+    const char* str = getenv ("UNW_ARM_UNWIND_METHOD");
+    if (str)
+      {
+        unwi_unwind_method = atoi (str);
+      }
+
+    mi_init ();
+
+    dwarf_init ();
+
+#ifndef UNW_REMOTE_ONLY
+    arm_local_addr_space_init ();
+#endif
+    tdep_init_done = 1; /* signal that we're initialized... */
+  }
+ out:
+  lock_release (&arm_lock, saved_mask);
+}
diff --git a/src/third_party/unwind/dist/src/arm/Ginit.c b/src/third_party/unwind/dist/src/arm/Ginit.c
new file mode 100644
index 00000000000..2720d063a24
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Ginit.c
@@ -0,0 +1,235 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "unwind_i.h"
+
+#ifdef UNW_REMOTE_ONLY
+
+/* unw_local_addr_space is a NULL pointer in this case.  */
+unw_addr_space_t unw_local_addr_space;
+
+#else /* !UNW_REMOTE_ONLY */
+
+static struct unw_addr_space local_addr_space;
+
+unw_addr_space_t unw_local_addr_space = &local_addr_space;
+
+static inline void *
+uc_addr (unw_tdep_context_t *uc, int reg)
+{
+  if (reg >= UNW_ARM_R0 && reg < UNW_ARM_R0 + 16)
+    return &uc->regs[reg - UNW_ARM_R0];
+  else
+    return NULL;
+}
+
+# ifdef UNW_LOCAL_ONLY
+
+HIDDEN void *
+tdep_uc_addr (unw_tdep_context_t *uc, int reg)
+{
+  return uc_addr (uc, reg);
+}
+
+# endif /* UNW_LOCAL_ONLY */
+
+HIDDEN unw_dyn_info_list_t _U_dyn_info_list;
+
+/* XXX fix me: there is currently no way to locate the dyn-info list
+       by a remote unwinder.  On ia64, this is done via a special
+       unwind-table entry.  Perhaps something similar can be done with
+       DWARF2 unwind info.  */
+
+static int
+get_dyn_info_list_addr (unw_addr_space_t as, unw_word_t *dyn_info_list_addr,
+                        void *arg)
+{
+  *dyn_info_list_addr = (unw_word_t) &_U_dyn_info_list;
+  return 0;
+}
+
+#define PAGE_SIZE 4096
+#define PAGE_START(a)	((a) & ~(PAGE_SIZE-1))
+
+/* Cache of already validated addresses */
+#define NLGA 4
+static unw_word_t last_good_addr[NLGA];
+static int lga_victim;
+
+static int
+validate_mem (unw_word_t addr)
+{
+  int i, victim;
+  size_t len;
+
+  if (PAGE_START(addr + sizeof (unw_word_t) - 1) == PAGE_START(addr))
+    len = PAGE_SIZE;
+  else
+    len = PAGE_SIZE * 2;
+
+  addr = PAGE_START(addr);
+
+  if (addr == 0)
+    return -1;
+
+  for (i = 0; i < NLGA; i++)
+    {
+      if (last_good_addr[i] && (addr == last_good_addr[i]))
+      return 0;
+    }
+
+  if (msync ((void *) addr, len, MS_ASYNC) == -1)
+    return -1;
+
+  victim = lga_victim;
+  for (i = 0; i < NLGA; i++) {
+    if (!last_good_addr[victim]) {
+      last_good_addr[victim++] = addr;
+      return 0;
+    }
+    victim = (victim + 1) % NLGA;
+  }
+
+  /* All slots full. Evict the victim. */
+  last_good_addr[victim] = addr;
+  victim = (victim + 1) % NLGA;
+  lga_victim = victim;
+
+  return 0;
+}
+
+static int
+access_mem (unw_addr_space_t as, unw_word_t addr, unw_word_t *val, int write,
+            void *arg)
+{
+  /* validate address */
+    const struct cursor *c = (const struct cursor *) arg;
+    if (c && validate_mem(addr))
+      return -1;
+
+  if (write)
+    {
+      Debug (16, "mem[%x] <- %x\n", addr, *val);
+      *(unw_word_t *) addr = *val;
+    }
+  else
+    {
+      *val = *(unw_word_t *) addr;
+      Debug (16, "mem[%x] -> %x\n", addr, *val);
+    }
+  return 0;
+}
+
+static int
+access_reg (unw_addr_space_t as, unw_regnum_t reg, unw_word_t *val, int write,
+            void *arg)
+{
+  unw_word_t *addr;
+  unw_tdep_context_t *uc = arg;
+
+  if (unw_is_fpreg (reg))
+    goto badreg;
+
+Debug (16, "reg = %s\n", unw_regname (reg));
+  if (!(addr = uc_addr (uc, reg)))
+    goto badreg;
+
+  if (write)
+    {
+      *(unw_word_t *) addr = *val;
+      Debug (12, "%s <- %x\n", unw_regname (reg), *val);
+    }
+  else
+    {
+      *val = *(unw_word_t *) addr;
+      Debug (12, "%s -> %x\n", unw_regname (reg), *val);
+    }
+  return 0;
+
+ badreg:
+  Debug (1, "bad register number %u\n", reg);
+  return -UNW_EBADREG;
+}
+
+static int
+access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val,
+              int write, void *arg)
+{
+  unw_tdep_context_t *uc = arg;
+  unw_fpreg_t *addr;
+
+  if (!unw_is_fpreg (reg))
+    goto badreg;
+
+  if (!(addr = uc_addr (uc, reg)))
+    goto badreg;
+
+  if (write)
+    {
+      Debug (12, "%s <- %08lx.%08lx.%08lx\n", unw_regname (reg),
+             ((long *)val)[0], ((long *)val)[1], ((long *)val)[2]);
+      *(unw_fpreg_t *) addr = *val;
+    }
+  else
+    {
+      *val = *(unw_fpreg_t *) addr;
+      Debug (12, "%s -> %08lx.%08lx.%08lx\n", unw_regname (reg),
+             ((long *)val)[0], ((long *)val)[1], ((long *)val)[2]);
+    }
+  return 0;
+
+ badreg:
+  Debug (1, "bad register number %u\n", reg);
+  /* attempt to access a non-preserved register */
+  return -UNW_EBADREG;
+}
+
+static int
+get_static_proc_name (unw_addr_space_t as, unw_word_t ip,
+                      char *buf, size_t buf_len, unw_word_t *offp,
+                      void *arg)
+{
+  return _Uelf32_get_proc_name (as, getpid (), ip, buf, buf_len, offp);
+}
+
+HIDDEN void
+arm_local_addr_space_init (void)
+{
+  memset (&local_addr_space, 0, sizeof (local_addr_space));
+  local_addr_space.caching_policy = UNWI_DEFAULT_CACHING_POLICY;
+  local_addr_space.acc.find_proc_info = arm_find_proc_info;
+  local_addr_space.acc.put_unwind_info = arm_put_unwind_info;
+  local_addr_space.acc.get_dyn_info_list_addr = get_dyn_info_list_addr;
+  local_addr_space.acc.access_mem = access_mem;
+  local_addr_space.acc.access_reg = access_reg;
+  local_addr_space.acc.access_fpreg = access_fpreg;
+  local_addr_space.acc.resume = arm_local_resume;
+  local_addr_space.acc.get_proc_name = get_static_proc_name;
+  unw_flush_cache (&local_addr_space, 0, 0);
+}
+
+#endif /* !UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/dist/src/arm/Ginit_local.c b/src/third_party/unwind/dist/src/arm/Ginit_local.c
new file mode 100644
index 00000000000..e13519b79a9
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Ginit_local.c
@@ -0,0 +1,78 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright 2011 Linaro Limited
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "init.h"
+
+#ifdef UNW_REMOTE_ONLY
+
+int
+unw_init_local (unw_cursor_t *cursor, unw_context_t *uc)
+{
+  return -UNW_EINVAL;
+}
+
+#else /* !UNW_REMOTE_ONLY */
+
+static int
+unw_init_local_common (unw_cursor_t *cursor, unw_context_t *uc, unsigned use_prev_instr)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  if (!tdep_init_done)
+    tdep_init ();
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  c->dwarf.as = unw_local_addr_space;
+  c->dwarf.as_arg = uc;
+
+  return common_init (c, use_prev_instr);
+}
+
+int
+unw_init_local (unw_cursor_t *cursor, unw_context_t *uc)
+{
+  return unw_init_local_common(cursor, uc, 1);
+}
+
+int
+unw_init_local2 (unw_cursor_t *cursor, unw_context_t *uc, int flag)
+{
+  if (!flag)
+    {
+      return unw_init_local_common(cursor, uc, 1);
+    }
+  else if (flag == UNW_INIT_SIGNAL_FRAME)
+    {
+      return unw_init_local_common(cursor, uc, 0);
+    }
+  else
+    {
+      return -UNW_EINVAL;
+    }
+}
+
+#endif /* !UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/dist/src/arm/Ginit_remote.c b/src/third_party/unwind/dist/src/arm/Ginit_remote.c
new file mode 100644
index 00000000000..9b8ba5b89de
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Ginit_remote.c
@@ -0,0 +1,45 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "init.h"
+#include "unwind_i.h"
+
+int
+unw_init_remote (unw_cursor_t *cursor, unw_addr_space_t as, void *as_arg)
+{
+#ifdef UNW_LOCAL_ONLY
+  return -UNW_EINVAL;
+#else /* !UNW_LOCAL_ONLY */
+  struct cursor *c = (struct cursor *) cursor;
+
+  if (!tdep_init_done)
+    tdep_init ();
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  c->dwarf.as = as;
+  c->dwarf.as_arg = as_arg;
+  return common_init (c, 0);
+#endif /* !UNW_LOCAL_ONLY */
+}
diff --git a/src/third_party/unwind/dist/src/arm/Gos-freebsd.c b/src/third_party/unwind/dist/src/arm/Gos-freebsd.c
new file mode 100644
index 00000000000..a1069223a50
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Gos-freebsd.c
@@ -0,0 +1,129 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright 2011 Linaro Limited
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+   Copyright 2015 The FreeBSD Foundation
+
+   Portions of this software were developed by Konstantin Belousov
+   under sponsorship from the FreeBSD Foundation.
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <stdio.h>
+#include <signal.h>
+#include "unwind_i.h"
+#include "offsets.h"
+#include "ex_tables.h"
+
+HIDDEN int
+arm_handle_signal_frame (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  int ret, fmt;
+  unw_word_t sc_addr, sp, sp_addr = c->dwarf.cfa;
+  struct dwarf_loc sp_loc = DWARF_LOC (sp_addr, 0);
+
+  if ((ret = dwarf_get (&c->dwarf, sp_loc, &sp)) < 0)
+    return -UNW_EUNSPEC;
+  fmt = unw_is_signal_frame(cursor);
+
+  c->dwarf.pi_valid = 0;
+
+  if (fmt == UNW_ARM_FRAME_SYSCALL)
+   {
+    c->sigcontext_format = ARM_SCF_FREEBSD_SYSCALL;
+    c->frame_info.frame_type = UNW_ARM_FRAME_SYSCALL;
+    c->frame_info.cfa_reg_offset = 0;
+    c->dwarf.loc[UNW_ARM_R7] = c->dwarf.loc[UNW_ARM_R12];
+    dwarf_get (&c->dwarf, c->dwarf.loc[UNW_ARM_R14], &c->dwarf.ip);
+    return 1;
+   }
+
+  c->sigcontext_format = ARM_SCF_FREEBSD_SIGFRAME;
+  sc_addr = sp_addr;
+
+  /* Save the SP and PC to be able to return execution at this point
+     later in time (unw_resume).  */
+  c->sigcontext_sp = c->dwarf.cfa;
+  c->sigcontext_pc = c->dwarf.ip;
+
+  c->sigcontext_addr = sc_addr;
+  c->frame_info.frame_type = UNW_ARM_FRAME_SIGRETURN;
+  c->frame_info.cfa_reg_offset = sc_addr - sp_addr;
+
+  /* Update the dwarf cursor.
+     Set the location of the registers to the corresponding addresses of the
+     uc_mcontext / sigcontext structure contents.  */
+#define ROFF(n)	(FREEBSD_SC_UCONTEXT_OFF + FREEBSD_UC_MCONTEXT_OFF + \
+  FREEBSD_MC_R0_OFF + (n) * 4)
+#define SL(n) \
+  c->dwarf.loc[UNW_ARM_R ## n] = DWARF_LOC (sc_addr + ROFF(n), 0);
+  SL(0); SL(1); SL(2); SL(3); SL(4); SL(5); SL(6); SL(7);
+  SL(8); SL(9); SL(10); SL(11); SL(12); SL(13); SL(14); SL(15);
+#undef SL
+#undef ROFF
+
+  /* Set SP/CFA and PC/IP.  */
+  dwarf_get (&c->dwarf, c->dwarf.loc[UNW_ARM_R13], &c->dwarf.cfa);
+  dwarf_get (&c->dwarf, c->dwarf.loc[UNW_ARM_R15], &c->dwarf.ip);
+
+  return 1;
+}
+
+/* Returns 1 in case of a non-RT signal frame and 2 in case of a RT signal
+   frame. */
+int
+unw_is_signal_frame (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  unw_word_t w0, w1, w2, w3, ip;
+  unw_addr_space_t as;
+  unw_accessors_t *a;
+  void *arg;
+  int ret;
+
+  as = c->dwarf.as;
+  a = unw_get_accessors_int (as);
+  arg = c->dwarf.as_arg;
+
+  ip = c->dwarf.ip;
+
+  if ((ret = (*a->access_mem) (as, ip, &w0, 0, arg)) < 0)
+    return ret;
+  if ((ret = (*a->access_mem) (as, ip + 4, &w1, 0, arg)) < 0)
+    return ret;
+  if ((ret = (*a->access_mem) (as, ip + 8, &w2, 0, arg)) < 0)
+    return ret;
+  if ((ret = (*a->access_mem) (as, ip + 12, &w3, 0, arg)) < 0)
+    return ret;
+
+  if (w0 == 0xe1a0000d && w1 == 0xe2800040 && w2 == 0xe59f700c &&
+    w3 == 0xef0001a1)
+     return UNW_ARM_FRAME_SIGRETURN;
+
+  if ((ret = (*a->access_mem) (as, ip - 4, &w0, 0, arg)) < 0)
+    return ret;
+  if (w0 == 0xef000000)
+    return UNW_ARM_FRAME_SYSCALL;
+
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/arm/Gos-linux.c b/src/third_party/unwind/dist/src/arm/Gos-linux.c
new file mode 100644
index 00000000000..260e086f695
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Gos-linux.c
@@ -0,0 +1,182 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright 2011 Linaro Limited
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <stdio.h>
+#include <signal.h>
+#include "unwind_i.h"
+#include "offsets.h"
+
+HIDDEN int
+arm_handle_signal_frame (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  int ret;
+  unw_word_t sc_addr, sp, sp_addr = c->dwarf.cfa;
+  struct dwarf_loc sp_loc = DWARF_LOC (sp_addr, 0);
+
+  if ((ret = dwarf_get (&c->dwarf, sp_loc, &sp)) < 0)
+    return -UNW_EUNSPEC;
+
+  /* Obtain signal frame type (non-RT or RT). */
+  ret = unw_is_signal_frame (cursor);
+
+  /* Save the SP and PC to be able to return execution at this point
+     later in time (unw_resume).  */
+  c->sigcontext_sp = c->dwarf.cfa;
+  c->sigcontext_pc = c->dwarf.ip;
+
+  /* Since kernel version 2.6.18 the non-RT signal frame starts with a
+     ucontext while the RT signal frame starts with a siginfo, followed
+     by a sigframe whose first element is an ucontext.
+     Prior 2.6.18 the non-RT signal frame starts with a sigcontext while
+     the RT signal frame starts with two pointers followed by a siginfo
+     and an ucontext. The first pointer points to the start of the siginfo
+     structure and the second one to the ucontext structure.  */
+
+  if (ret == 1)
+    {
+      /* Handle non-RT signal frames. Check if the first word on the stack
+         is the magic number.  */
+      if (sp == 0x5ac3c35a)
+        {
+          c->sigcontext_format = ARM_SCF_LINUX_SIGFRAME;
+          sc_addr = sp_addr + LINUX_UC_MCONTEXT_OFF;
+        }
+      else
+        {
+          c->sigcontext_format = ARM_SCF_LINUX_OLD_SIGFRAME;
+          sc_addr = sp_addr;
+        }
+    }
+  else if (ret == 2)
+    {
+      /* Handle RT signal frames. Check if the first word on the stack is a
+         pointer to the siginfo structure.  */
+      if (sp == sp_addr + 8)
+        {
+          c->sigcontext_format = ARM_SCF_LINUX_OLD_RT_SIGFRAME;
+          sc_addr = sp_addr + 8 + sizeof (siginfo_t) + LINUX_UC_MCONTEXT_OFF;
+        }
+      else
+        {
+          c->sigcontext_format = ARM_SCF_LINUX_RT_SIGFRAME;
+          sc_addr = sp_addr + sizeof (siginfo_t) + LINUX_UC_MCONTEXT_OFF;
+        }
+    }
+  else
+    return -UNW_EUNSPEC;
+
+  c->sigcontext_addr = sc_addr;
+  c->frame_info.frame_type = UNW_ARM_FRAME_SIGRETURN;
+  c->frame_info.cfa_reg_offset = sc_addr - sp_addr;
+
+  /* Update the dwarf cursor.
+     Set the location of the registers to the corresponding addresses of the
+     uc_mcontext / sigcontext structure contents.  */
+  c->dwarf.loc[UNW_ARM_R0] = DWARF_LOC (sc_addr + LINUX_SC_R0_OFF, 0);
+  c->dwarf.loc[UNW_ARM_R1] = DWARF_LOC (sc_addr + LINUX_SC_R1_OFF, 0);
+  c->dwarf.loc[UNW_ARM_R2] = DWARF_LOC (sc_addr + LINUX_SC_R2_OFF, 0);
+  c->dwarf.loc[UNW_ARM_R3] = DWARF_LOC (sc_addr + LINUX_SC_R3_OFF, 0);
+  c->dwarf.loc[UNW_ARM_R4] = DWARF_LOC (sc_addr + LINUX_SC_R4_OFF, 0);
+  c->dwarf.loc[UNW_ARM_R5] = DWARF_LOC (sc_addr + LINUX_SC_R5_OFF, 0);
+  c->dwarf.loc[UNW_ARM_R6] = DWARF_LOC (sc_addr + LINUX_SC_R6_OFF, 0);
+  c->dwarf.loc[UNW_ARM_R7] = DWARF_LOC (sc_addr + LINUX_SC_R7_OFF, 0);
+  c->dwarf.loc[UNW_ARM_R8] = DWARF_LOC (sc_addr + LINUX_SC_R8_OFF, 0);
+  c->dwarf.loc[UNW_ARM_R9] = DWARF_LOC (sc_addr + LINUX_SC_R9_OFF, 0);
+  c->dwarf.loc[UNW_ARM_R10] = DWARF_LOC (sc_addr + LINUX_SC_R10_OFF, 0);
+  c->dwarf.loc[UNW_ARM_R11] = DWARF_LOC (sc_addr + LINUX_SC_FP_OFF, 0);
+  c->dwarf.loc[UNW_ARM_R12] = DWARF_LOC (sc_addr + LINUX_SC_IP_OFF, 0);
+  c->dwarf.loc[UNW_ARM_R13] = DWARF_LOC (sc_addr + LINUX_SC_SP_OFF, 0);
+  c->dwarf.loc[UNW_ARM_R14] = DWARF_LOC (sc_addr + LINUX_SC_LR_OFF, 0);
+  c->dwarf.loc[UNW_ARM_R15] = DWARF_LOC (sc_addr + LINUX_SC_PC_OFF, 0);
+
+  /* Set SP/CFA and PC/IP.  */
+  dwarf_get (&c->dwarf, c->dwarf.loc[UNW_ARM_R13], &c->dwarf.cfa);
+  dwarf_get (&c->dwarf, c->dwarf.loc[UNW_ARM_R15], &c->dwarf.ip);
+
+  c->dwarf.pi_valid = 0;
+
+  return 1;
+}
+
+#define ARM_NR_sigreturn 119
+#define ARM_NR_rt_sigreturn 173
+#define ARM_NR_OABI_SYSCALL_BASE 0x900000
+
+/* ARM EABI sigreturn (the syscall number is loaded into r7) */
+#define MOV_R7_SIGRETURN (0xe3a07000UL | ARM_NR_sigreturn)
+#define MOV_R7_RT_SIGRETURN (0xe3a07000UL | ARM_NR_rt_sigreturn)
+
+/* ARM OABI sigreturn (using SWI) */
+#define ARM_SIGRETURN \
+  (0xef000000UL | ARM_NR_sigreturn | ARM_NR_OABI_SYSCALL_BASE)
+#define ARM_RT_SIGRETURN \
+  (0xef000000UL | ARM_NR_rt_sigreturn | ARM_NR_OABI_SYSCALL_BASE)
+
+/* Thumb sigreturn (two insns, syscall number is loaded into r7) */
+#define THUMB_SIGRETURN (0xdf00UL << 16 | 0x2700 | ARM_NR_sigreturn)
+#define THUMB_RT_SIGRETURN (0xdf00UL << 16 | 0x2700 | ARM_NR_rt_sigreturn)
+
+/* Thumb2 sigreturn (mov.w r7, $SYS_ify(rt_sigreturn/sigreturn)) */
+#define THUMB2_SIGRETURN (((0x0700 | ARM_NR_sigreturn) << 16) | \
+                                       0xf04f)
+#define THUMB2_RT_SIGRETURN (((0x0700 | ARM_NR_rt_sigreturn) << 16) | \
+                                       0xf04f)
+/* TODO: with different toolchains, there are a lot more possibilities */
+
+/* Returns 1 in case of a non-RT signal frame and 2 in case of a RT signal
+   frame. */
+int
+unw_is_signal_frame (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  unw_word_t w0, ip;
+  unw_addr_space_t as;
+  unw_accessors_t *a;
+  void *arg;
+  int ret;
+
+  as = c->dwarf.as;
+  a = unw_get_accessors_int (as);
+  arg = c->dwarf.as_arg;
+
+  /* The least bit denotes thumb/arm mode. Do not read there. */
+  ip = c->dwarf.ip & ~0x1;
+
+  if ((ret = (*a->access_mem) (as, ip, &w0, 0, arg)) < 0)
+    return ret;
+
+  /* Return 1 if the IP points to a non-RT sigreturn sequence.  */
+  if (w0 == MOV_R7_SIGRETURN || w0 == ARM_SIGRETURN || w0 == THUMB_SIGRETURN
+           || w0 == THUMB2_SIGRETURN)
+    return 1;
+  /* Return 2 if the IP points to a RT sigreturn sequence.  */
+  else if (w0 == MOV_R7_RT_SIGRETURN || w0 == ARM_RT_SIGRETURN
+           || w0 == THUMB_RT_SIGRETURN || w0 == THUMB2_RT_SIGRETURN)
+    return 2;
+
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/arm/Gos-other.c b/src/third_party/unwind/dist/src/arm/Gos-other.c
new file mode 100644
index 00000000000..73c102c3d26
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Gos-other.c
@@ -0,0 +1,48 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright 2011 Linaro Limited
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <stdio.h>
+#include <signal.h>
+#include "unwind_i.h"
+#include "offsets.h"
+
+HIDDEN int
+arm_handle_signal_frame (unw_cursor_t *cursor)
+{
+  return -UNW_EUNSPEC;
+}
+
+int
+unw_is_signal_frame (unw_cursor_t *cursor)
+{
+#if defined(__QNX__)
+  /* Not supported yet */
+  return 0;
+#else
+  printf ("%s: implement me\n", __FUNCTION__);
+  return -UNW_ENOINFO;
+#endif
+}
diff --git a/src/third_party/unwind/dist/src/arm/Greg_states_iterate.c b/src/third_party/unwind/dist/src/arm/Greg_states_iterate.c
new file mode 100644
index 00000000000..a17dc1b561d
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Greg_states_iterate.c
@@ -0,0 +1,37 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_reg_states_iterate (unw_cursor_t *cursor,
+			unw_reg_states_callback cb, void *token)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  return dwarf_reg_states_iterate (&c->dwarf, cb, token);
+}
diff --git a/src/third_party/unwind/dist/src/arm/Gregs.c b/src/third_party/unwind/dist/src/arm/Gregs.c
new file mode 100644
index 00000000000..0d52f0b2225
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Gregs.c
@@ -0,0 +1,83 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+HIDDEN int
+tdep_access_reg (struct cursor *c, unw_regnum_t reg, unw_word_t *valp,
+                 int write)
+{
+  dwarf_loc_t loc = DWARF_NULL_LOC;
+  
+  switch (reg)
+    {
+    case UNW_ARM_R15:
+      if (write)
+        c->dwarf.ip = *valp;            /* update the IP cache */
+    case UNW_ARM_R0:
+    case UNW_ARM_R1:
+    case UNW_ARM_R2:
+    case UNW_ARM_R3:
+    case UNW_ARM_R4:
+    case UNW_ARM_R5:
+    case UNW_ARM_R6:
+    case UNW_ARM_R7:
+    case UNW_ARM_R8:
+    case UNW_ARM_R9:
+    case UNW_ARM_R10:
+    case UNW_ARM_R11:
+    case UNW_ARM_R12:
+    case UNW_ARM_R14:
+      loc = c->dwarf.loc[reg - UNW_ARM_R0];
+      break;
+
+    case UNW_ARM_R13:
+    case UNW_ARM_CFA:
+      if (write)
+        return -UNW_EREADONLYREG;
+      *valp = c->dwarf.cfa;
+      return 0;
+
+    /* FIXME: Initialise coprocessor & shadow registers?  */
+
+    default:
+      Debug (1, "bad register number %u\n", reg);
+      return -UNW_EBADREG;
+    }
+
+  if (write)
+    return dwarf_put (&c->dwarf, loc, *valp);
+  else
+    return dwarf_get (&c->dwarf, loc, valp);
+}
+
+/* FIXME for ARM.  */
+
+HIDDEN int
+tdep_access_fpreg (struct cursor *c, unw_regnum_t reg, unw_fpreg_t *valp,
+                   int write)
+{
+  Debug (1, "bad register number %u\n", reg);
+  return -UNW_EBADREG;
+}
diff --git a/src/third_party/unwind/dist/src/arm/Gresume.c b/src/third_party/unwind/dist/src/arm/Gresume.c
new file mode 100644
index 00000000000..a8288628a6c
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Gresume.c
@@ -0,0 +1,154 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright 2011 Linaro Limited
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "offsets.h"
+
+#ifndef UNW_REMOTE_ONLY
+
+HIDDEN inline int
+arm_local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg)
+{
+#ifdef __linux__
+  struct cursor *c = (struct cursor *) cursor;
+  unw_tdep_context_t *uc = c->dwarf.as_arg;
+
+  if (c->sigcontext_format == ARM_SCF_NONE)
+    {
+      /* Since there are no signals involved here we restore the non scratch
+         registers only.  */
+      unsigned long regs[10];
+      regs[0] = uc->regs[4];
+      regs[1] = uc->regs[5];
+      regs[2] = uc->regs[6];
+      regs[3] = uc->regs[7];
+      regs[4] = uc->regs[8];
+      regs[5] = uc->regs[9];
+      regs[6] = uc->regs[10];
+      regs[7] = uc->regs[11]; /* FP */
+      regs[8] = uc->regs[13]; /* SP */
+      regs[9] = uc->regs[14]; /* LR */
+
+      struct regs_overlay {
+              char x[sizeof(regs)];
+      };
+
+      asm __volatile__ (
+        "ldmia %0, {r4-r12, lr}\n"
+        "mov sp, r12\n"
+        "bx lr\n"
+        : : "r" (regs),
+            "m" (*(struct regs_overlay *)regs)
+      );
+    }
+  else
+    {
+      /* In case a signal frame is involved, we're using its trampoline which
+         calls sigreturn.  */
+      struct sigcontext *sc = (struct sigcontext *) c->sigcontext_addr;
+      sc->arm_r0 = uc->regs[0];
+      sc->arm_r1 = uc->regs[1];
+      sc->arm_r2 = uc->regs[2];
+      sc->arm_r3 = uc->regs[3];
+      sc->arm_r4 = uc->regs[4];
+      sc->arm_r5 = uc->regs[5];
+      sc->arm_r6 = uc->regs[6];
+      sc->arm_r7 = uc->regs[7];
+      sc->arm_r8 = uc->regs[8];
+      sc->arm_r9 = uc->regs[9];
+      sc->arm_r10 = uc->regs[10];
+      sc->arm_fp = uc->regs[11]; /* FP */
+      sc->arm_ip = uc->regs[12]; /* IP */
+      sc->arm_sp = uc->regs[13]; /* SP */
+      sc->arm_lr = uc->regs[14]; /* LR */
+      sc->arm_pc = uc->regs[15]; /* PC */
+      /* clear the ITSTATE bits.  */
+      sc->arm_cpsr &= 0xf9ff03ffUL;
+
+      /* Set the SP and the PC in order to continue execution at the modified
+         trampoline which restores the signal mask and the registers.  */
+      asm __volatile__ (
+        "mov sp, %0\n"
+        "bx %1\n"
+        : : "r" (c->sigcontext_sp), "r" (c->sigcontext_pc)
+      );
+   }
+  unreachable();
+#else
+  printf ("%s: implement me\n", __FUNCTION__);
+#endif
+  return -UNW_EINVAL;
+}
+
+#endif /* !UNW_REMOTE_ONLY */
+
+static inline void
+establish_machine_state (struct cursor *c)
+{
+  unw_addr_space_t as = c->dwarf.as;
+  void *arg = c->dwarf.as_arg;
+  unw_fpreg_t fpval;
+  unw_word_t val;
+  int reg;
+
+  Debug (8, "copying out cursor state\n");
+
+  for (reg = 0; reg <= UNW_REG_LAST; ++reg)
+    {
+      Debug (16, "copying %s %d\n", unw_regname (reg), reg);
+      if (unw_is_fpreg (reg))
+        {
+          if (tdep_access_fpreg (c, reg, &fpval, 0) >= 0)
+            as->acc.access_fpreg (as, reg, &fpval, 1, arg);
+        }
+      else
+        {
+          if (tdep_access_reg (c, reg, &val, 0) >= 0)
+            as->acc.access_reg (as, reg, &val, 1, arg);
+        }
+    }
+}
+
+int
+unw_resume (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  if (!c->dwarf.ip)
+    {
+      /* This can happen easily when the frame-chain gets truncated
+         due to bad or missing unwind-info.  */
+      Debug (1, "refusing to resume execution at address 0\n");
+      return -UNW_EINVAL;
+    }
+
+  establish_machine_state (c);
+
+  return (*c->dwarf.as->acc.resume) (c->dwarf.as, (unw_cursor_t *) c,
+                                     c->dwarf.as_arg);
+}
diff --git a/src/third_party/unwind/dist/src/arm/Gstash_frame.c b/src/third_party/unwind/dist/src/arm/Gstash_frame.c
new file mode 100644
index 00000000000..c5a76b86d0a
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Gstash_frame.c
@@ -0,0 +1,90 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2010, 2011 by FERMI NATIONAL ACCELERATOR LABORATORY
+   Copyright (C) 2014 CERN and Aalto University
+        Contributed by Filip Nyback
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+HIDDEN void
+tdep_stash_frame (struct dwarf_cursor *d, struct dwarf_reg_state *rs)
+{
+  struct cursor *c = (struct cursor *) dwarf_to_cursor (d);
+  unw_tdep_frame_t *f = &c->frame_info;
+
+  Debug (4, "ip=0x%x cfa=0x%x type %d cfa [where=%d val=%d] cfaoff=%d"
+         " ra=0x%x r7 [where=%d val=%d @0x%x] lr [where=%d val=%d @0x%x] "
+         "sp [where=%d val=%d @0x%x]\n",
+         d->ip, d->cfa, f->frame_type,
+         rs->reg.where[DWARF_CFA_REG_COLUMN],
+         rs->reg.val[DWARF_CFA_REG_COLUMN],
+         rs->reg.val[DWARF_CFA_OFF_COLUMN],
+         DWARF_GET_LOC(d->loc[rs->ret_addr_column]),
+         rs->reg.where[R7], rs->reg.val[R7], DWARF_GET_LOC(d->loc[R7]),
+         rs->reg.where[LR], rs->reg.val[LR], DWARF_GET_LOC(d->loc[LR]),
+         rs->reg.where[SP], rs->reg.val[SP], DWARF_GET_LOC(d->loc[SP]));
+
+  /* A standard frame is defined as:
+      - CFA is register-relative offset off R7 or SP;
+      - Return address is saved in LR;
+      - R7 is unsaved or saved at CFA+offset, offset != -1;
+      - LR is unsaved or saved at CFA+offset, offset != -1;
+      - SP is unsaved or saved at CFA+offset, offset != -1.  */
+  if (f->frame_type == UNW_ARM_FRAME_OTHER
+      && (rs->reg.where[DWARF_CFA_REG_COLUMN] == DWARF_WHERE_REG)
+      && (rs->reg.val[DWARF_CFA_REG_COLUMN] == R7
+          || rs->reg.val[DWARF_CFA_REG_COLUMN] == SP)
+      && labs(rs->reg.val[DWARF_CFA_OFF_COLUMN]) < (1 << 29)
+      && rs->ret_addr_column == LR
+      && (rs->reg.where[R7] == DWARF_WHERE_UNDEF
+          || rs->reg.where[R7] == DWARF_WHERE_SAME
+          || (rs->reg.where[R7] == DWARF_WHERE_CFAREL
+              && labs(rs->reg.val[R7]) < (1 << 29)
+              && rs->reg.val[R7]+1 != 0))
+      && (rs->reg.where[LR] == DWARF_WHERE_UNDEF
+          || rs->reg.where[LR] == DWARF_WHERE_SAME
+          || (rs->reg.where[LR] == DWARF_WHERE_CFAREL
+              && labs(rs->reg.val[LR]) < (1 << 29)
+              && rs->reg.val[LR]+1 != 0))
+      && (rs->reg.where[SP] == DWARF_WHERE_UNDEF
+          || rs->reg.where[SP] == DWARF_WHERE_SAME
+          || (rs->reg.where[SP] == DWARF_WHERE_CFAREL
+              && labs(rs->reg.val[SP]) < (1 << 29)
+              && rs->reg.val[SP]+1 != 0)))
+  {
+    /* Save information for a standard frame. */
+    f->frame_type = UNW_ARM_FRAME_STANDARD;
+    f->cfa_reg_sp = (rs->reg.val[DWARF_CFA_REG_COLUMN] == SP);
+    f->cfa_reg_offset = rs->reg.val[DWARF_CFA_OFF_COLUMN];
+    if (rs->reg.where[R7] == DWARF_WHERE_CFAREL)
+      f->r7_cfa_offset = rs->reg.val[R7];
+    if (rs->reg.where[LR] == DWARF_WHERE_CFAREL)
+      f->lr_cfa_offset = rs->reg.val[LR];
+    if (rs->reg.where[SP] == DWARF_WHERE_CFAREL)
+      f->sp_cfa_offset = rs->reg.val[SP];
+    Debug (4, " standard frame\n");
+  }
+  else
+    Debug (4, " unusual frame\n");
+}
+
diff --git a/src/third_party/unwind/dist/src/arm/Gstep.c b/src/third_party/unwind/dist/src/arm/Gstep.c
new file mode 100644
index 00000000000..adec02e095c
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Gstep.c
@@ -0,0 +1,200 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright 2011 Linaro Limited
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "offsets.h"
+#include "ex_tables.h"
+
+#include <signal.h>
+
+#define arm_exidx_step  UNW_OBJ(arm_exidx_step)
+
+static inline int
+arm_exidx_step (struct cursor *c)
+{
+  unw_word_t old_ip, old_cfa;
+  uint8_t buf[32];
+  int ret;
+
+  old_ip = c->dwarf.ip;
+  old_cfa = c->dwarf.cfa;
+
+  /* mark PC unsaved */
+  c->dwarf.loc[UNW_ARM_R15] = DWARF_NULL_LOC;
+  unw_word_t ip = c->dwarf.ip;
+  if (c->dwarf.use_prev_instr)
+    --ip;
+
+  /* check dynamic info first --- it overrides everything else */
+  ret = unwi_find_dynamic_proc_info (c->dwarf.as, ip, &c->dwarf.pi, 1,
+                                     c->dwarf.as_arg);
+  if (ret == -UNW_ENOINFO)
+    {
+      if ((ret = tdep_find_proc_info (&c->dwarf, ip, 1)) < 0)
+        return ret;
+    }
+
+  if (c->dwarf.pi.format != UNW_INFO_FORMAT_ARM_EXIDX)
+    return -UNW_ENOINFO;
+
+  ret = arm_exidx_extract (&c->dwarf, buf);
+  if (ret == -UNW_ESTOPUNWIND)
+    return 0;
+  else if (ret < 0)
+    return ret;
+
+  ret = arm_exidx_decode (buf, ret, &c->dwarf);
+  if (ret < 0)
+    return ret;
+
+  if (c->dwarf.ip == old_ip && c->dwarf.cfa == old_cfa)
+    {
+      Dprintf ("%s: ip and cfa unchanged; stopping here (ip=0x%lx)\n",
+               __FUNCTION__, (long) c->dwarf.ip);
+      return -UNW_EBADFRAME;
+    }
+
+  c->dwarf.pi_valid = 0;
+
+  return (c->dwarf.ip == 0) ? 0 : 1;
+}
+
+int
+unw_step (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  int ret = -UNW_EUNSPEC;
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  /* Check if this is a signal frame. */
+  if (unw_is_signal_frame (cursor) > 0)
+     return arm_handle_signal_frame (cursor);
+
+#ifdef CONFIG_DEBUG_FRAME
+  /* First, try DWARF-based unwinding. */
+  if (UNW_TRY_METHOD(UNW_ARM_METHOD_DWARF))
+    {
+      ret = dwarf_step (&c->dwarf);
+      Debug(1, "dwarf_step()=%d\n", ret);
+
+      if (likely (ret > 0))
+        return 1;
+      else if (unlikely (ret == -UNW_ESTOPUNWIND))
+        return ret;
+
+      if (ret < 0 && ret != -UNW_ENOINFO)
+        {
+          Debug (2, "returning %d\n", ret);
+          return ret;
+        }
+    }
+#endif /* CONFIG_DEBUG_FRAME */
+
+  /* Next, try extbl-based unwinding. */
+  if (UNW_TRY_METHOD (UNW_ARM_METHOD_EXIDX))
+    {
+      Debug (13, "%s(ret=%d), trying extbl\n",
+             UNW_TRY_METHOD(UNW_ARM_METHOD_DWARF) ? "dwarf_step() failed " : "",
+             ret);
+      ret = arm_exidx_step (c);
+      if (ret > 0)
+        return 1;
+      if (ret == -UNW_ESTOPUNWIND || ret == 0)
+        return ret;
+    }
+
+  /* Fall back on APCS frame parsing.
+     Note: This won't work in case the ARM EABI is used. */
+#ifdef __FreeBSD__
+  if (0)
+#else
+  if (unlikely (ret < 0))
+#endif
+    {
+      if (UNW_TRY_METHOD(UNW_ARM_METHOD_FRAME))
+        {
+          Debug (13, "%s%s%s%s(ret=%d), trying frame-chain\n",
+                 UNW_TRY_METHOD(UNW_ARM_METHOD_DWARF) ? "dwarf_step() " : "",
+                 (UNW_TRY_METHOD(UNW_ARM_METHOD_DWARF) && UNW_TRY_METHOD(UNW_ARM_METHOD_EXIDX)) ? "and " : "",
+                 UNW_TRY_METHOD(UNW_ARM_METHOD_EXIDX) ? "arm_exidx_step() " : "",
+                 (UNW_TRY_METHOD(UNW_ARM_METHOD_DWARF) || UNW_TRY_METHOD(UNW_ARM_METHOD_EXIDX)) ? "failed " : "",
+                 ret);
+          ret = UNW_ESUCCESS;
+          /* DWARF unwinding failed, try to follow APCS/optimized APCS frame chain */
+          unw_word_t instr, i;
+          dwarf_loc_t ip_loc, fp_loc;
+          unw_word_t frame;
+          /* Mark all registers unsaved, since we don't know where
+             they are saved (if at all), except for the EBP and
+             EIP.  */
+          if (dwarf_get(&c->dwarf, c->dwarf.loc[UNW_ARM_R11], &frame) < 0)
+            {
+              return 0;
+            }
+          for (i = 0; i < DWARF_NUM_PRESERVED_REGS; ++i) {
+            c->dwarf.loc[i] = DWARF_NULL_LOC;
+          }
+          if (frame)
+            {
+              if (dwarf_get(&c->dwarf, DWARF_LOC(frame, 0), &instr) < 0)
+                {
+                  return 0;
+                }
+              instr -= 8;
+              if (dwarf_get(&c->dwarf, DWARF_LOC(instr, 0), &instr) < 0)
+                {
+                  return 0;
+                }
+              if ((instr & 0xFFFFD800) == 0xE92DD800)
+                {
+                  /* Standard APCS frame. */
+                  ip_loc = DWARF_LOC(frame - 4, 0);
+                  fp_loc = DWARF_LOC(frame - 12, 0);
+                }
+              else
+                {
+                  /* Codesourcery optimized normal frame. */
+                  ip_loc = DWARF_LOC(frame, 0);
+                  fp_loc = DWARF_LOC(frame - 4, 0);
+                }
+              if (dwarf_get(&c->dwarf, ip_loc, &c->dwarf.ip) < 0)
+                {
+                  return 0;
+                }
+              c->dwarf.loc[UNW_ARM_R12] = ip_loc;
+              c->dwarf.loc[UNW_ARM_R11] = fp_loc;
+              c->dwarf.pi_valid = 0;
+              Debug(15, "ip=%x\n", c->dwarf.ip);
+            }
+          else
+            {
+              ret = -UNW_ENOINFO;
+            }
+        }
+    }
+  return ret == -UNW_ENOINFO ? 0 : ret;
+}
diff --git a/src/third_party/unwind/dist/src/arm/Gtrace.c b/src/third_party/unwind/dist/src/arm/Gtrace.c
new file mode 100644
index 00000000000..2f277520b36
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Gtrace.c
@@ -0,0 +1,557 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2010, 2011 by FERMI NATIONAL ACCELERATOR LABORATORY
+   Copyright (C) 2014 CERN and Aalto University
+        Contributed by Filip Nyback
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "offsets.h"
+#include <signal.h>
+#include <limits.h>
+
+#pragma weak pthread_once
+#pragma weak pthread_key_create
+#pragma weak pthread_getspecific
+#pragma weak pthread_setspecific
+
+/* Initial hash table size. Table expands by 2 bits (times four). */
+#define HASH_MIN_BITS 14
+
+typedef struct
+{
+  unw_tdep_frame_t *frames;
+  size_t log_size;
+  size_t used;
+  size_t dtor_count;  /* Counts how many times our destructor has already
+                         been called. */
+} unw_trace_cache_t;
+
+static const unw_tdep_frame_t empty_frame = { 0, UNW_ARM_FRAME_OTHER, -1, -1, 0, -1, -1, -1 };
+static define_lock (trace_init_lock);
+static pthread_once_t trace_cache_once = PTHREAD_ONCE_INIT;
+static sig_atomic_t trace_cache_once_happen;
+static pthread_key_t trace_cache_key;
+static struct mempool trace_cache_pool;
+static __thread  unw_trace_cache_t *tls_cache;
+static __thread  int tls_cache_destroyed;
+
+/* Free memory for a thread's trace cache. */
+static void
+trace_cache_free (void *arg)
+{
+  unw_trace_cache_t *cache = arg;
+  if (++cache->dtor_count < PTHREAD_DESTRUCTOR_ITERATIONS)
+  {
+    /* Not yet our turn to get destroyed. Re-install ourselves into the key. */
+    pthread_setspecific(trace_cache_key, cache);
+    Debug(5, "delayed freeing cache %p (%zx to go)\n", cache,
+          PTHREAD_DESTRUCTOR_ITERATIONS - cache->dtor_count);
+    return;
+  }
+  tls_cache_destroyed = 1;
+  tls_cache = NULL;
+  munmap (cache->frames, (1u << cache->log_size) * sizeof(unw_tdep_frame_t));
+  mempool_free (&trace_cache_pool, cache);
+  Debug(5, "freed cache %p\n", cache);
+}
+
+/* Initialise frame tracing for threaded use. */
+static void
+trace_cache_init_once (void)
+{
+  pthread_key_create (&trace_cache_key, &trace_cache_free);
+  mempool_init (&trace_cache_pool, sizeof (unw_trace_cache_t), 0);
+  trace_cache_once_happen = 1;
+}
+
+static unw_tdep_frame_t *
+trace_cache_buckets (size_t n)
+{
+  unw_tdep_frame_t *frames;
+  size_t i;
+
+  GET_MEMORY(frames, n * sizeof (unw_tdep_frame_t));
+  if (likely(frames != NULL))
+    for (i = 0; i < n; ++i)
+      frames[i] = empty_frame;
+
+  return frames;
+}
+
+/* Allocate and initialise hash table for frame cache lookups.
+   Returns the cache initialised with (1u << HASH_LOW_BITS) hash
+   buckets, or NULL if there was a memory allocation problem. */
+static unw_trace_cache_t *
+trace_cache_create (void)
+{
+  unw_trace_cache_t *cache;
+
+  if (tls_cache_destroyed)
+  {
+    /* The current thread is in the process of exiting. Don't recreate
+       cache, as we wouldn't have another chance to free it. */
+    Debug(5, "refusing to reallocate cache: "
+             "thread-locals are being deallocated\n");
+    return NULL;
+  }
+
+  if (! (cache = mempool_alloc(&trace_cache_pool)))
+  {
+    Debug(5, "failed to allocate cache\n");
+    return NULL;
+  }
+
+  if (! (cache->frames = trace_cache_buckets(1u << HASH_MIN_BITS)))
+  {
+    Debug(5, "failed to allocate buckets\n");
+    mempool_free(&trace_cache_pool, cache);
+    return NULL;
+  }
+
+  cache->log_size = HASH_MIN_BITS;
+  cache->used = 0;
+  cache->dtor_count = 0;
+  tls_cache_destroyed = 0;  /* Paranoia: should already be 0. */
+  Debug(5, "allocated cache %p\n", cache);
+  return cache;
+}
+
+/* Expand the hash table in the frame cache if possible. This always
+   quadruples the hash size, and clears all previous frame entries. */
+static int
+trace_cache_expand (unw_trace_cache_t *cache)
+{
+  size_t old_size = (1u << cache->log_size);
+  size_t new_log_size = cache->log_size + 2;
+  unw_tdep_frame_t *new_frames = trace_cache_buckets (1u << new_log_size);
+
+  if (unlikely(! new_frames))
+  {
+    Debug(5, "failed to expand cache to 2^%u buckets\n", new_log_size);
+    return -UNW_ENOMEM;
+  }
+
+  Debug(5, "expanded cache from 2^%u to 2^%u buckets\n", cache->log_size,
+        new_log_size);
+  munmap(cache->frames, old_size * sizeof(unw_tdep_frame_t));
+  cache->frames = new_frames;
+  cache->log_size = new_log_size;
+  cache->used = 0;
+  return 0;
+}
+
+static unw_trace_cache_t *
+trace_cache_get_unthreaded (void)
+{
+  unw_trace_cache_t *cache;
+  intrmask_t saved_mask;
+  static unw_trace_cache_t *global_cache = NULL;
+  lock_acquire (&trace_init_lock, saved_mask);
+  if (! global_cache)
+  {
+    mempool_init (&trace_cache_pool, sizeof (unw_trace_cache_t), 0);
+    global_cache = trace_cache_create ();
+  }
+  cache = global_cache;
+  lock_release (&trace_init_lock, saved_mask);
+  Debug(5, "using cache %p\n", cache);
+  return cache;
+}
+
+/* Get the frame cache for the current thread. Create it if there is none. */
+static unw_trace_cache_t *
+trace_cache_get (void)
+{
+  unw_trace_cache_t *cache;
+  if (likely (pthread_once != NULL))
+  {
+    pthread_once(&trace_cache_once, &trace_cache_init_once);
+    if (!trace_cache_once_happen)
+    {
+      return trace_cache_get_unthreaded();
+    }
+    if (! (cache = tls_cache))
+    {
+      cache = trace_cache_create();
+      pthread_setspecific(trace_cache_key, cache);
+      tls_cache = cache;
+    }
+    Debug(5, "using cache %p\n", cache);
+    return cache;
+  }
+  else
+  {
+    return trace_cache_get_unthreaded();
+  }
+}
+
+/* Initialise frame properties for address cache slot F at address
+   PC using current CFA, R7 and SP values.  Modifies CURSOR to
+   that location, performs one unw_step(), and fills F with what
+   was discovered about the location.  Returns F.
+
+   FIXME: This probably should tell DWARF handling to never evaluate
+   or use registers other than R7, SP and PC in case there is
+   highly unusual unwind info which uses these creatively. */
+static unw_tdep_frame_t *
+trace_init_addr (unw_tdep_frame_t *f,
+                 unw_cursor_t *cursor,
+                 unw_word_t cfa,
+                 unw_word_t pc,
+                 unw_word_t r7,
+                 unw_word_t sp)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  struct dwarf_cursor *d = &c->dwarf;
+  int ret = -UNW_EINVAL;
+
+  /* Initialise frame properties: unknown, not last. */
+  f->virtual_address = pc;
+  f->frame_type = UNW_ARM_FRAME_OTHER;
+  f->last_frame = 0;
+  f->cfa_reg_sp = -1;
+  f->cfa_reg_offset = 0;
+  f->r7_cfa_offset = -1;
+  f->lr_cfa_offset = -1;
+  f->sp_cfa_offset = -1;
+
+  /* Reinitialise cursor to this instruction - but undo next/prev RIP
+     adjustment because unw_step will redo it - and force PC, R7 and
+     SP into register locations (=~ ucontext we keep), then set
+     their desired values. Then perform the step. */
+  d->ip = pc + d->use_prev_instr;
+  d->cfa = cfa;
+  d->loc[UNW_ARM_R7] = DWARF_REG_LOC (d, UNW_ARM_R7);
+  d->loc[UNW_ARM_R13] = DWARF_REG_LOC (d, UNW_ARM_R13);
+  d->loc[UNW_ARM_R15] = DWARF_REG_LOC (d, UNW_ARM_R15);
+  c->frame_info = *f;
+
+  if (likely(dwarf_put (d, d->loc[UNW_ARM_R7], r7) >= 0)
+      && likely(dwarf_put (d, d->loc[UNW_ARM_R13], sp) >= 0)
+      && likely(dwarf_put (d, d->loc[UNW_ARM_R15], pc) >= 0)
+      && likely((ret = unw_step (cursor)) >= 0))
+    *f = c->frame_info;
+
+  /* If unw_step() stopped voluntarily, remember that, even if it
+     otherwise could not determine anything useful.  This avoids
+     failing trace if we hit frames without unwind info, which is
+     common for the outermost frame (CRT stuff) on many systems.
+     This avoids failing trace in very common circumstances; failing
+     to unw_step() loop wouldn't produce any better result. */
+  if (ret == 0)
+    f->last_frame = -1;
+
+  Debug (3, "frame va %x type %d last %d cfa %s+%d r7 @ cfa%+d lr @ cfa%+d sp @ cfa%+d\n",
+         f->virtual_address, f->frame_type, f->last_frame,
+         f->cfa_reg_sp ? "sp" : "r7", f->cfa_reg_offset,
+         f->r7_cfa_offset, f->lr_cfa_offset, f->sp_cfa_offset);
+
+  return f;
+}
+
+/* Look up and if necessary fill in frame attributes for address PC
+   in CACHE using current CFA, R7 and SP values.  Uses CURSOR to
+   perform any unwind steps necessary to fill the cache.  Returns the
+   frame cache slot which describes RIP. */
+static unw_tdep_frame_t *
+trace_lookup (unw_cursor_t *cursor,
+              unw_trace_cache_t *cache,
+              unw_word_t cfa,
+              unw_word_t pc,
+              unw_word_t r7,
+              unw_word_t sp)
+{
+  /* First look up for previously cached information using cache as
+     linear probing hash table with probe step of 1.  Majority of
+     lookups should be completed within few steps, but it is very
+     important the hash table does not fill up, or performance falls
+     off the cliff. */
+  uint32_t i, addr;
+  uint32_t cache_size = 1u << cache->log_size;
+  uint32_t slot = ((pc * 0x9e3779b9) >> 11) & (cache_size-1);
+  unw_tdep_frame_t *frame;
+
+  for (i = 0; i < 16; ++i)
+  {
+    frame = &cache->frames[slot];
+    addr = frame->virtual_address;
+
+    /* Return if we found the address. */
+    if (likely(addr == pc))
+    {
+      Debug (4, "found address after %d steps\n", i);
+      return frame;
+    }
+
+    /* If slot is empty, reuse it. */
+    if (likely(! addr))
+      break;
+
+    /* Linear probe to next slot candidate, step = 1. */
+    if (++slot >= cache_size)
+      slot -= cache_size;
+  }
+
+  /* If we collided after 16 steps, or if the hash is more than half
+     full, force the hash to expand. Fill the selected slot, whether
+     it's free or collides. Note that hash expansion drops previous
+     contents; further lookups will refill the hash. */
+  Debug (4, "updating slot %u after %d steps, replacing 0x%x\n", slot, i, addr);
+  if (unlikely(addr || cache->used >= cache_size / 2))
+  {
+    if (unlikely(trace_cache_expand (cache) < 0))
+      return NULL;
+
+    cache_size = 1u << cache->log_size;
+    slot = ((pc * 0x9e3779b9) >> 11) & (cache_size-1);
+    frame = &cache->frames[slot];
+    addr = frame->virtual_address;
+  }
+
+  if (! addr)
+    ++cache->used;
+
+  return trace_init_addr (frame, cursor, cfa, pc, r7, sp);
+}
+
+/* Fast stack backtrace for ARM.
+
+   This is used by backtrace() implementation to accelerate frequent
+   queries for current stack, without any desire to unwind. It fills
+   BUFFER with the call tree from CURSOR upwards for at most SIZE
+   stack levels. The first frame, backtrace itself, is omitted. When
+   called, SIZE should give the maximum number of entries that can be
+   stored into BUFFER. Uses an internal thread-specific cache to
+   accelerate queries.
+
+   The caller should fall back to a unw_step() loop if this function
+   fails by returning -UNW_ESTOPUNWIND, meaning the routine hit a
+   stack frame that is too complex to be traced in the fast path.
+
+   This function is tuned for clients which only need to walk the
+   stack to get the call tree as fast as possible but without any
+   other details, for example profilers sampling the stack thousands
+   to millions of times per second.  The routine handles the most
+   common ARM ABI stack layouts: CFA is R7 or SP plus/minus
+   constant offset, return address is in LR, and R7, LR and SP are
+   either unchanged or saved on stack at constant offset from the CFA;
+   the signal return frame; and frames without unwind info provided
+   they are at the outermost (final) frame or can conservatively be
+   assumed to be frame-pointer based.
+
+   Any other stack layout will cause the routine to give up. There
+   are only a handful of relatively rarely used functions which do
+   not have a stack in the standard form: vfork, longjmp, setcontext
+   and _dl_runtime_profile on common linux systems for example.
+
+   On success BUFFER and *SIZE reflect the trace progress up to *SIZE
+   stack levels or the outermost frame, which ever is less.  It may
+   stop short of outermost frame if unw_step() loop would also do so,
+   e.g. if there is no more unwind information; this is not reported
+   as an error.
+
+   The function returns a negative value for errors, -UNW_ESTOPUNWIND
+   if tracing stopped because of an unusual frame unwind info.  The
+   BUFFER and *SIZE reflect tracing progress up to the error frame.
+
+   Callers of this function would normally look like this:
+
+     unw_cursor_t     cur;
+     unw_context_t    ctx;
+     void             addrs[128];
+     int              depth = 128;
+     int              ret;
+
+     unw_getcontext(&ctx);
+     unw_init_local(&cur, &ctx);
+     if ((ret = unw_tdep_trace(&cur, addrs, &depth)) < 0)
+     {
+       depth = 0;
+       unw_getcontext(&ctx);
+       unw_init_local(&cur, &ctx);
+       while ((ret = unw_step(&cur)) > 0 && depth < 128)
+       {
+         unw_word_t ip;
+         unw_get_reg(&cur, UNW_REG_IP, &ip);
+         addresses[depth++] = (void *) ip;
+       }
+     }
+*/
+HIDDEN int
+tdep_trace (unw_cursor_t *cursor, void **buffer, int *size)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  struct dwarf_cursor *d = &c->dwarf;
+  unw_trace_cache_t *cache;
+  unw_word_t sp, pc, cfa, r7, lr;
+  int maxdepth = 0;
+  int depth = 0;
+  int ret;
+
+  /* Check input parametres. */
+  if (unlikely(! cursor || ! buffer || ! size || (maxdepth = *size) <= 0))
+    return -UNW_EINVAL;
+
+  Debug (1, "begin ip 0x%x cfa 0x%x\n", d->ip, d->cfa);
+
+  /* Tell core dwarf routines to call back to us. */
+  d->stash_frames = 1;
+
+  /* Determine initial register values. These are direct access safe
+     because we know they come from the initial machine context. */
+  pc = d->ip;
+  sp = cfa = d->cfa;
+  ACCESS_MEM_FAST(ret, 0, d, DWARF_GET_LOC(d->loc[UNW_ARM_R7]), r7);
+  assert(ret == 0);
+  lr = 0;
+
+  /* Get frame cache. */
+  if (unlikely(! (cache = trace_cache_get())))
+  {
+    Debug (1, "returning %d, cannot get trace cache\n", -UNW_ENOMEM);
+    *size = 0;
+    d->stash_frames = 0;
+    return -UNW_ENOMEM;
+  }
+
+  /* Trace the stack upwards, starting from current PC.  Adjust
+     the PC address for previous/next instruction as the main
+     unwinding logic would also do.  We undo this before calling
+     back into unw_step(). */
+  while (depth < maxdepth)
+  {
+    pc -= d->use_prev_instr;
+    Debug (2, "depth %d cfa 0x%x pc 0x%x sp 0x%x r7 0x%x\n",
+           depth, cfa, pc, sp, r7);
+
+    /* See if we have this address cached.  If not, evaluate enough of
+       the dwarf unwind information to fill the cache line data, or to
+       decide this frame cannot be handled in fast trace mode.  We
+       cache negative results too to prevent unnecessary dwarf parsing
+       for common failures. */
+    unw_tdep_frame_t *f = trace_lookup (cursor, cache, cfa, pc, r7, sp);
+
+    /* If we don't have information for this frame, give up. */
+    if (unlikely(! f))
+    {
+      ret = -UNW_ENOINFO;
+      break;
+    }
+
+    Debug (3, "frame va %x type %d last %d cfa %s+%d r7 @ cfa%+d lr @ cfa%+d sp @ cfa%+d\n",
+           f->virtual_address, f->frame_type, f->last_frame,
+           f->cfa_reg_sp ? "sp" : "r7", f->cfa_reg_offset,
+           f->r7_cfa_offset, f->lr_cfa_offset, f->sp_cfa_offset);
+
+    assert (f->virtual_address == pc);
+
+    /* Stop if this was the last frame.  In particular don't evaluate
+       new register values as it may not be safe - we don't normally
+       run with full validation on, and do not want to - and there's
+       enough bad unwind info floating around that we need to trust
+       what unw_step() previously said, in potentially bogus frames. */
+    if (f->last_frame)
+      break;
+
+    /* Evaluate CFA and registers for the next frame. */
+    switch (f->frame_type)
+    {
+    case UNW_ARM_FRAME_GUESSED:
+      /* Fall thru to standard processing after forcing validation. */
+      c->validate = 1;
+
+    case UNW_ARM_FRAME_STANDARD:
+      /* Advance standard traceable frame. */
+      cfa = (f->cfa_reg_sp ? sp : r7) + f->cfa_reg_offset;
+      if (likely(f->lr_cfa_offset != -1))
+        ACCESS_MEM_FAST(ret, c->validate, d, cfa + f->lr_cfa_offset, pc);
+      else if (lr != 0)
+      {
+        /* Use the saved link register as the new pc. */
+        pc = lr;
+        lr = 0;
+      }
+      if (likely(ret >= 0) && likely(f->r7_cfa_offset != -1))
+        ACCESS_MEM_FAST(ret, c->validate, d, cfa + f->r7_cfa_offset, r7);
+
+      /* Don't bother reading SP from DWARF, CFA becomes new SP. */
+      sp = cfa;
+
+      /* Next frame needs to back up for unwind info lookup. */
+      d->use_prev_instr = 1;
+      break;
+
+    case UNW_ARM_FRAME_SIGRETURN:
+      cfa = cfa + f->cfa_reg_offset; /* cfa now points to ucontext_t.  */
+#if defined(__linux__)
+      ACCESS_MEM_FAST(ret, c->validate, d, cfa + LINUX_SC_PC_OFF, pc);
+      if (likely(ret >= 0))
+        ACCESS_MEM_FAST(ret, c->validate, d, cfa + LINUX_SC_R7_OFF, r7);
+      if (likely(ret >= 0))
+        ACCESS_MEM_FAST(ret, c->validate, d, cfa + LINUX_SC_SP_OFF, sp);
+      /* Save the link register here in case we end up in a function that
+         doesn't save the link register in the prologue, e.g. kill. */
+      if (likely(ret >= 0))
+        ACCESS_MEM_FAST(ret, c->validate, d, cfa + LINUX_SC_LR_OFF, lr);
+#elif defined(__FreeBSD__)
+      printf("XXX\n");
+#endif
+
+      /* Resume stack at signal restoration point. The stack is not
+         necessarily continuous here, especially with sigaltstack(). */
+      cfa = sp;
+
+      /* Next frame should not back up. */
+      d->use_prev_instr = 0;
+      break;
+
+    case UNW_ARM_FRAME_SYSCALL:
+      printf("XXX1\n");
+      break;
+
+    default:
+      /* We cannot trace through this frame, give up and tell the
+          caller we had to stop.  Data collected so far may still be
+          useful to the caller, so let it know how far we got.  */
+      ret = -UNW_ESTOPUNWIND;
+      break;
+    }
+
+    Debug (4, "new cfa 0x%x pc 0x%x sp 0x%x r7 0x%x\n",
+           cfa, pc, sp, r7);
+
+    /* If we failed or ended up somewhere bogus, stop. */
+    if (unlikely(ret < 0 || pc < 0x4000))
+      break;
+
+    /* Record this address in stack trace. We skipped the first address. */
+    buffer[depth++] = (void *) (pc - d->use_prev_instr);
+  }
+
+#if UNW_DEBUG
+  Debug (1, "returning %d, depth %d\n", ret, depth);
+#endif
+  *size = depth;
+  return ret;
+}
+
diff --git a/src/third_party/unwind/dist/src/arm/Lapply_reg_state.c b/src/third_party/unwind/dist/src/arm/Lapply_reg_state.c
new file mode 100644
index 00000000000..7ebada480e5
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Lapply_reg_state.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gapply_reg_state.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/arm/Lcreate_addr_space.c b/src/third_party/unwind/dist/src/arm/Lcreate_addr_space.c
new file mode 100644
index 00000000000..0f2dc6be901
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Lcreate_addr_space.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gcreate_addr_space.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/arm/Lex_tables.c b/src/third_party/unwind/dist/src/arm/Lex_tables.c
new file mode 100644
index 00000000000..4a4f925c9c3
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Lex_tables.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gex_tables.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/arm/Lget_proc_info.c b/src/third_party/unwind/dist/src/arm/Lget_proc_info.c
new file mode 100644
index 00000000000..69028b019fc
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Lget_proc_info.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gget_proc_info.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/arm/Lget_save_loc.c b/src/third_party/unwind/dist/src/arm/Lget_save_loc.c
new file mode 100644
index 00000000000..9ea048a9076
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Lget_save_loc.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gget_save_loc.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/arm/Lglobal.c b/src/third_party/unwind/dist/src/arm/Lglobal.c
new file mode 100644
index 00000000000..6d7b489e14b
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Lglobal.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gglobal.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/arm/Linit.c b/src/third_party/unwind/dist/src/arm/Linit.c
new file mode 100644
index 00000000000..e9abfdd46a3
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Linit.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/arm/Linit_local.c b/src/third_party/unwind/dist/src/arm/Linit_local.c
new file mode 100644
index 00000000000..68a1687e854
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Linit_local.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit_local.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/arm/Linit_remote.c b/src/third_party/unwind/dist/src/arm/Linit_remote.c
new file mode 100644
index 00000000000..58cb04ab7cd
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Linit_remote.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit_remote.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/arm/Los-freebsd.c b/src/third_party/unwind/dist/src/arm/Los-freebsd.c
new file mode 100644
index 00000000000..a75a205df19
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Los-freebsd.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gos-freebsd.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/arm/Los-linux.c b/src/third_party/unwind/dist/src/arm/Los-linux.c
new file mode 100644
index 00000000000..3cc18aabcc3
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Los-linux.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gos-linux.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/arm/Los-other.c b/src/third_party/unwind/dist/src/arm/Los-other.c
new file mode 100644
index 00000000000..a75a205df19
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Los-other.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gos-freebsd.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/arm/Lreg_states_iterate.c b/src/third_party/unwind/dist/src/arm/Lreg_states_iterate.c
new file mode 100644
index 00000000000..f1eb1e79dcd
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Lreg_states_iterate.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Greg_states_iterate.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/arm/Lregs.c b/src/third_party/unwind/dist/src/arm/Lregs.c
new file mode 100644
index 00000000000..2c9c75cd7d9
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Lregs.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gregs.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/arm/Lresume.c b/src/third_party/unwind/dist/src/arm/Lresume.c
new file mode 100644
index 00000000000..41a8cf003de
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Lresume.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gresume.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/arm/Lstash_frame.c b/src/third_party/unwind/dist/src/arm/Lstash_frame.c
new file mode 100644
index 00000000000..77587803d08
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Lstash_frame.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gstash_frame.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/arm/Lstep.c b/src/third_party/unwind/dist/src/arm/Lstep.c
new file mode 100644
index 00000000000..c1ac3c7547f
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Lstep.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gstep.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/arm/Ltrace.c b/src/third_party/unwind/dist/src/arm/Ltrace.c
new file mode 100644
index 00000000000..24b7b3cfa62
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/Ltrace.c
@@ -0,0 +1,6 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gtrace.c"
+#endif
+
diff --git a/src/third_party/unwind/dist/src/arm/getcontext.S b/src/third_party/unwind/dist/src/arm/getcontext.S
new file mode 100644
index 00000000000..7e18784477d
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/getcontext.S
@@ -0,0 +1,63 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "offsets.h"
+
+	.text
+	.arm
+
+	.global _Uarm_getcontext
+	.type	_Uarm_getcontext, %function
+	@ This is a stub version of getcontext() for ARM which only stores core
+	@ registers.  It must be called in a special way, not as a regular
+	@ function -- see also the libunwind-arm.h:unw_tdep_getcontext macro.
+_Uarm_getcontext:
+	stmfd sp!, {r0, r1}
+	@ store r0
+#if defined(__linux__)
+	str r0, [r0, #LINUX_UC_MCONTEXT_OFF + LINUX_SC_R0_OFF]
+	add r0, r0, #LINUX_UC_MCONTEXT_OFF + LINUX_SC_R0_OFF
+#elif defined(__FreeBSD__)
+	str r0, [r0, #FREEBSD_UC_MCONTEXT_OFF + FREEBSD_MC_R0_OFF]
+	add r0, r0, #FREEBSD_UC_MCONTEXT_OFF + FREEBSD_MC_R0_OFF
+#else
+#error Fix me
+#endif
+	@ store r1 to r12
+	stmib r0, {r1-r12}
+	@ reconstruct r13 at call site, then store
+	add r1, sp, #12
+	str r1, [r0, #13 * 4]
+	@ retrieve r14 from call site, then store
+	ldr r1, [sp, #8]
+	str r1, [r0, #14 * 4]
+	@ point lr to instruction after call site's stack adjustment
+	add r1, lr, #4
+	str r1, [r0, #15 * 4]
+	ldmfd sp!, {r0, r1}
+	bx lr
+#if defined(__linux__) || defined(__FreeBSD__)
+ /* We do not need executable stack.  */
+ .section  .note.GNU-stack,"",%progbits
+#endif
diff --git a/src/third_party/unwind/dist/src/arm/init.h b/src/third_party/unwind/dist/src/arm/init.h
new file mode 100644
index 00000000000..7d765ecf097
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/init.h
@@ -0,0 +1,77 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+static inline int
+common_init (struct cursor *c, unsigned use_prev_instr)
+{
+  int ret, i;
+
+  c->dwarf.loc[UNW_ARM_R0] = DWARF_REG_LOC (&c->dwarf, UNW_ARM_R0);
+  c->dwarf.loc[UNW_ARM_R1] = DWARF_REG_LOC (&c->dwarf, UNW_ARM_R1);
+  c->dwarf.loc[UNW_ARM_R2] = DWARF_REG_LOC (&c->dwarf, UNW_ARM_R2);
+  c->dwarf.loc[UNW_ARM_R3] = DWARF_REG_LOC (&c->dwarf, UNW_ARM_R3);
+  c->dwarf.loc[UNW_ARM_R4] = DWARF_REG_LOC (&c->dwarf, UNW_ARM_R4);
+  c->dwarf.loc[UNW_ARM_R5] = DWARF_REG_LOC (&c->dwarf, UNW_ARM_R5);
+  c->dwarf.loc[UNW_ARM_R6] = DWARF_REG_LOC (&c->dwarf, UNW_ARM_R6);
+  c->dwarf.loc[UNW_ARM_R7] = DWARF_REG_LOC (&c->dwarf, UNW_ARM_R7);
+  c->dwarf.loc[UNW_ARM_R8] = DWARF_REG_LOC (&c->dwarf, UNW_ARM_R8);
+  c->dwarf.loc[UNW_ARM_R9] = DWARF_REG_LOC (&c->dwarf, UNW_ARM_R9);
+  c->dwarf.loc[UNW_ARM_R10] = DWARF_REG_LOC (&c->dwarf, UNW_ARM_R10);
+  c->dwarf.loc[UNW_ARM_R11] = DWARF_REG_LOC (&c->dwarf, UNW_ARM_R11);
+  c->dwarf.loc[UNW_ARM_R12] = DWARF_REG_LOC (&c->dwarf, UNW_ARM_R12);
+  c->dwarf.loc[UNW_ARM_R13] = DWARF_REG_LOC (&c->dwarf, UNW_ARM_R13);
+  c->dwarf.loc[UNW_ARM_R14] = DWARF_REG_LOC (&c->dwarf, UNW_ARM_R14);
+  c->dwarf.loc[UNW_ARM_R15] = DWARF_REG_LOC (&c->dwarf, UNW_ARM_R15);
+  for (i = UNW_ARM_R15 + 1; i < DWARF_NUM_PRESERVED_REGS; ++i)
+    c->dwarf.loc[i] = DWARF_NULL_LOC;
+
+  ret = dwarf_get (&c->dwarf, c->dwarf.loc[UNW_ARM_R15], &c->dwarf.ip);
+  if (ret < 0)
+    return ret;
+
+  /* FIXME: correct for ARM?  */
+  ret = dwarf_get (&c->dwarf, DWARF_REG_LOC (&c->dwarf, UNW_ARM_R13),
+                   &c->dwarf.cfa);
+  if (ret < 0)
+    return ret;
+
+  c->sigcontext_format = ARM_SCF_NONE;
+  c->sigcontext_addr = 0;
+  c->sigcontext_sp = 0;
+  c->sigcontext_pc = 0;
+
+  /* FIXME: Initialisation for other registers.  */
+
+  c->dwarf.args_size = 0;
+  c->dwarf.stash_frames = 0;
+  c->dwarf.use_prev_instr = use_prev_instr;
+  c->dwarf.pi_valid = 0;
+  c->dwarf.pi_is_dynamic = 0;
+  c->dwarf.hint = 0;
+  c->dwarf.prev_rs = 0;
+
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/arm/is_fpreg.c b/src/third_party/unwind/dist/src/arm/is_fpreg.c
new file mode 100644
index 00000000000..e55bcff03ed
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/is_fpreg.c
@@ -0,0 +1,39 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "libunwind_i.h"
+
+/* FIXME: I'm not sure if libunwind's GP/FP register distinction is very useful
+   on ARM.  Count all the FP or coprocessor registers we know about for now.  */
+
+int
+unw_is_fpreg (int regnum)
+{
+  return ((regnum >= UNW_ARM_S0 && regnum <= UNW_ARM_S31)
+          || (regnum >= UNW_ARM_F0 && regnum <= UNW_ARM_F7)
+          || (regnum >= UNW_ARM_wCGR0 && regnum <= UNW_ARM_wCGR7)
+          || (regnum >= UNW_ARM_wR0 && regnum <= UNW_ARM_wR15)
+          || (regnum >= UNW_ARM_wC0 && regnum <= UNW_ARM_wC7)
+          || (regnum >= UNW_ARM_D0 && regnum <= UNW_ARM_D31));
+}
diff --git a/src/third_party/unwind/dist/src/arm/offsets.h b/src/third_party/unwind/dist/src/arm/offsets.h
new file mode 100644
index 00000000000..621701106c4
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/offsets.h
@@ -0,0 +1,42 @@
+/* Linux-specific definitions: */
+
+/* Define various structure offsets to simplify cross-compilation.  */
+
+/* Offsets for ARM Linux "ucontext_t":  */
+
+#define LINUX_UC_FLAGS_OFF      0x00
+#define LINUX_UC_LINK_OFF       0x04
+#define LINUX_UC_STACK_OFF      0x08
+#define LINUX_UC_MCONTEXT_OFF   0x14
+#define LINUX_UC_SIGMASK_OFF    0x68
+#define LINUX_UC_REGSPACE_OFF   0xE8
+
+/* Offsets for ARM Linux "struct sigcontext":  */
+
+#define LINUX_SC_TRAPNO_OFF     0x00
+#define LINUX_SC_ERRORCODE_OFF  0x04
+#define LINUX_SC_OLDMASK_OFF    0x08
+#define LINUX_SC_R0_OFF         0x0C
+#define LINUX_SC_R1_OFF         0x10
+#define LINUX_SC_R2_OFF         0x14
+#define LINUX_SC_R3_OFF         0x18
+#define LINUX_SC_R4_OFF         0x1C
+#define LINUX_SC_R5_OFF         0x20
+#define LINUX_SC_R6_OFF         0x24
+#define LINUX_SC_R7_OFF         0x28
+#define LINUX_SC_R8_OFF         0x2C
+#define LINUX_SC_R9_OFF         0x30
+#define LINUX_SC_R10_OFF        0x34
+#define LINUX_SC_FP_OFF         0x38
+#define LINUX_SC_IP_OFF         0x3C
+#define LINUX_SC_SP_OFF         0x40
+#define LINUX_SC_LR_OFF         0x44
+#define LINUX_SC_PC_OFF         0x48
+#define LINUX_SC_CPSR_OFF       0x4C
+#define LINUX_SC_FAULTADDR_OFF  0x50
+
+/* FreeBSD-specific definitions: */
+
+#define FREEBSD_SC_UCONTEXT_OFF		0x40
+#define	FREEBSD_UC_MCONTEXT_OFF		0x10
+#define FREEBSD_MC_R0_OFF		0
diff --git a/src/third_party/unwind/dist/src/arm/regname.c b/src/third_party/unwind/dist/src/arm/regname.c
new file mode 100644
index 00000000000..7cac630c177
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/regname.c
@@ -0,0 +1,90 @@
+#include "unwind_i.h"
+
+static const char *regname[] =
+  {
+    /* 0.  */
+    "r0",  "r1",  "r2",  "r3",  "r4",  "r5",  "r6",  "r7",
+    /* 8.  */
+    "r8",  "r9",  "r10", "fp",  "ip",  "sp",  "lr",  "pc",
+    /* 16.  Obsolete FPA names.  */
+    "f0",  "f1",  "f2",  "f3",  "f4",  "f5",  "f6",  "f7",
+    /* 24.  */
+    0, 0, 0, 0, 0, 0, 0, 0,
+    /* 32.  */
+    0, 0, 0, 0, 0, 0, 0, 0,
+    /* 40.  */
+    0, 0, 0, 0, 0, 0, 0, 0,
+    /* 48.  */
+    0, 0, 0, 0, 0, 0, 0, 0,
+    /* 56.  */
+    0, 0, 0, 0, 0, 0, 0, 0,
+    /* 64.  */
+    "s0",  "s1",  "s2",  "s3",  "s4",  "s5",  "s6",  "s7",
+    /* 72.  */
+    "s8",  "s9",  "s10", "s11", "s12", "s13", "s14", "s15",
+    /* 80.  */
+    "s16", "s17", "s18", "s19", "s20", "s21", "s22", "s23",
+    /* 88.  */
+    "s24", "s25", "s26", "s27", "s28", "s29", "s30", "s31",
+    /* 96.  */
+    "f0",  "f1",  "f2",  "f3",  "f4",  "f5",  "f6",  "f7",
+    /* 104.  */
+    "wCGR0", "wCGR1", "wCGR2", "wCGR3", "wCGR4", "wCGR5", "wCGR6", "wCGR7",
+    /* 112.  */
+    "wR0", "wR1", "wR2", "wR3", "wR4", "wR5", "wR6", "wR7",
+    /* 128.  */
+    "spsr", "spsr_fiq", "spsr_irq", "spsr_abt", "spsr_und", "spsr_svc", 0, 0,
+    /* 136.  */
+    0, 0, 0, 0, 0, 0, 0, 0,
+    /* 144.  */
+    "r8_usr", "r9_usr", "r10_usr", "r11_usr", "r12_usr", "r13_usr", "r14_usr",
+    /* 151.  */
+    "r8_fiq", "r9_fiq", "r10_fiq", "r11_fiq", "r12_fiq", "r13_fiq", "r14_fiq",
+    /* 158.  */
+    "r13_irq", "r14_irq",
+    /* 160.  */
+    "r13_abt", "r14_abt",
+    /* 162.  */
+    "r13_und", "r14_und",
+    /* 164.  */
+    "r13_svc", "r14_svc", 0, 0,
+    /* 168.  */
+    0, 0, 0, 0, 0, 0, 0, 0,
+    /* 176.  */
+    0, 0, 0, 0, 0, 0, 0, 0,
+    /* 184.  */
+    0, 0, 0, 0, 0, 0, 0, 0,
+    /* 192.  */
+    "wC0", "wC1", "wC2", "wC3", "wC4", "wC5", "wC6", "wC7",
+    /* 200.  */
+    0, 0, 0, 0, 0, 0, 0, 0,
+    /* 208.  */
+    0, 0, 0, 0, 0, 0, 0, 0,
+    /* 216.  */
+    0, 0, 0, 0, 0, 0, 0, 0,
+    /* 224.  */
+    0, 0, 0, 0, 0, 0, 0, 0,
+    /* 232.  */
+    0, 0, 0, 0, 0, 0, 0, 0,
+    /* 240.  */
+    0, 0, 0, 0, 0, 0, 0, 0,
+    /* 248.  */
+    0, 0, 0, 0, 0, 0, 0, 0,
+    /* 256.  */
+    "d0",  "d1",  "d2",  "d3",  "d4",  "d5",  "d6",  "d7",
+    /* 264.  */
+    "d8",  "d9",  "d10", "d11", "d12", "d13", "d14", "d15",
+    /* 272.  */
+    "d16", "d17", "d18", "d19", "d20", "d21", "d22", "d23",
+    /* 280.  */
+    "d24", "d25", "d26", "d27", "d28", "d29", "d30", "d31",
+  };
+
+const char *
+unw_regname (unw_regnum_t reg)
+{
+  if (reg < (unw_regnum_t) ARRAY_SIZE (regname))
+    return regname[reg];
+  else
+    return "???";
+}
diff --git a/src/third_party/unwind/dist/src/arm/siglongjmp.S b/src/third_party/unwind/dist/src/arm/siglongjmp.S
new file mode 100644
index 00000000000..4df07366831
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/siglongjmp.S
@@ -0,0 +1,12 @@
+	/* Dummy implementation for now.  */
+
+	.globl _UI_siglongjmp_cont
+	.globl _UI_longjmp_cont
+
+_UI_siglongjmp_cont:
+_UI_longjmp_cont:
+	bx lr
+#ifdef __linux__
+ /* We do not need executable stack.  */
+ .section  .note.GNU-stack,"",%progbits
+#endif
diff --git a/src/third_party/unwind/dist/src/arm/unwind_i.h b/src/third_party/unwind/dist/src/arm/unwind_i.h
new file mode 100644
index 00000000000..fe0bca005b1
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/unwind_i.h
@@ -0,0 +1,62 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef unwind_i_h
+#define unwind_i_h
+
+#include <stdint.h>
+
+#include <libunwind-arm.h>
+
+#include "libunwind_i.h"
+
+/* DWARF column numbers for ARM: */
+#define R7      7
+#define SP      13
+#define LR      14
+#define PC      15
+
+#define arm_lock                        UNW_OBJ(lock)
+#define arm_local_resume                UNW_OBJ(local_resume)
+#define arm_local_addr_space_init       UNW_OBJ(local_addr_space_init)
+
+extern void arm_local_addr_space_init (void);
+extern int arm_local_resume (unw_addr_space_t as, unw_cursor_t *cursor,
+                             void *arg);
+#define arm_handle_signal_frame UNW_OBJ(handle_signal_frame)
+extern int arm_handle_signal_frame(unw_cursor_t *cursor);
+
+/* By-pass calls to access_mem() when known to be safe. */
+#ifdef UNW_LOCAL_ONLY
+# undef ACCESS_MEM_FAST
+# define ACCESS_MEM_FAST(ret,validate,cur,addr,to)                     \
+  do {                                                                 \
+    if (unlikely(validate))                                            \
+      (ret) = dwarf_get ((cur), DWARF_MEM_LOC ((cur), (addr)), &(to)); \
+    else                                                               \
+      (ret) = 0, (to) = *(unw_word_t *)(addr);                         \
+  } while (0)
+#endif
+
+#endif /* unwind_i_h */
diff --git a/src/third_party/unwind/dist/src/coredump/_UCD_access_mem.c b/src/third_party/unwind/dist/src/coredump/_UCD_access_mem.c
new file mode 100644
index 00000000000..1fdbd128ffc
--- /dev/null
+++ b/src/third_party/unwind/dist/src/coredump/_UCD_access_mem.c
@@ -0,0 +1,98 @@
+/* libunwind - a platform-independent unwind library
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "_UCD_lib.h"
+#include "_UCD_internal.h"
+
+int
+_UCD_access_mem(unw_addr_space_t as, unw_word_t addr, unw_word_t *val,
+                 int write, void *arg)
+{
+  if (write)
+    {
+      Debug(0, "write is not supported\n");
+      return -UNW_EINVAL;
+    }
+
+  struct UCD_info *ui = arg;
+
+  unw_word_t addr_last = addr + sizeof(*val)-1;
+  coredump_phdr_t *phdr;
+  unsigned i;
+  for (i = 0; i < ui->phdrs_count; i++)
+    {
+      phdr = &ui->phdrs[i];
+      if (phdr->p_vaddr <= addr && addr_last < phdr->p_vaddr + phdr->p_memsz)
+        {
+          goto found;
+        }
+    }
+  Debug(1, "addr 0x%llx is unmapped\n", (unsigned long long)addr);
+  return -UNW_EINVAL;
+
+ found: ;
+
+  const char *filename UNUSED;
+  off_t fileofs;
+  int fd;
+  if (addr_last >= phdr->p_vaddr + phdr->p_filesz)
+    {
+      /* This part of mapped address space is not present in coredump file */
+      /* Do we have it in the backup file? */
+      if (phdr->backing_fd < 0)
+        {
+          Debug(1, "access to not-present data in phdr[%d]: addr:0x%llx\n",
+                                i, (unsigned long long)addr
+                        );
+          return -UNW_EINVAL;
+        }
+      filename = phdr->backing_filename;
+      fileofs = addr - phdr->p_vaddr;
+      fd = phdr->backing_fd;
+      goto read;
+    }
+
+  filename = ui->coredump_filename;
+  fileofs = phdr->p_offset + (addr - phdr->p_vaddr);
+  fd = ui->coredump_fd;
+ read:
+  if (lseek(fd, fileofs, SEEK_SET) != fileofs)
+    goto read_error;
+  if (read(fd, val, sizeof(*val)) != sizeof(*val))
+    goto read_error;
+
+  Debug(1, "0x%llx <- [addr:0x%llx fileofs:0x%llx]\n",
+        (unsigned long long)(*val),
+        (unsigned long long)addr,
+        (unsigned long long)fileofs
+  );
+  return 0;
+
+ read_error:
+  Debug(1, "access out of file: addr:0x%llx fileofs:%llx file:'%s'\n",
+        (unsigned long long)addr,
+        (unsigned long long)fileofs,
+        filename
+  );
+  return -UNW_EINVAL;
+}
diff --git a/src/third_party/unwind/dist/src/coredump/_UCD_access_reg_freebsd.c b/src/third_party/unwind/dist/src/coredump/_UCD_access_reg_freebsd.c
new file mode 100644
index 00000000000..930a1148e4f
--- /dev/null
+++ b/src/third_party/unwind/dist/src/coredump/_UCD_access_reg_freebsd.c
@@ -0,0 +1,157 @@
+/* libunwind - a platform-independent unwind library
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "_UCD_lib.h"
+
+#include "_UCD_internal.h"
+
+int
+_UCD_access_reg (unw_addr_space_t as,
+                                unw_regnum_t regnum, unw_word_t *valp,
+                                int write, void *arg)
+{
+  if (write)
+    {
+      Debug(0, "write is not supported\n");
+      return -UNW_EINVAL;
+    }
+
+  struct UCD_info *ui = arg;
+
+#if defined(UNW_TARGET_X86)
+  switch (regnum) {
+  case UNW_X86_EAX:
+     *valp = ui->prstatus->pr_reg.r_eax;
+     break;
+  case UNW_X86_EDX:
+     *valp = ui->prstatus->pr_reg.r_edx;
+     break;
+  case UNW_X86_ECX:
+     *valp = ui->prstatus->pr_reg.r_ecx;
+     break;
+  case UNW_X86_EBX:
+     *valp = ui->prstatus->pr_reg.r_ebx;
+     break;
+  case UNW_X86_ESI:
+     *valp = ui->prstatus->pr_reg.r_esi;
+     break;
+  case UNW_X86_EDI:
+     *valp = ui->prstatus->pr_reg.r_edi;
+     break;
+  case UNW_X86_EBP:
+     *valp = ui->prstatus->pr_reg.r_ebp;
+     break;
+  case UNW_X86_ESP:
+     *valp = ui->prstatus->pr_reg.r_esp;
+     break;
+  case UNW_X86_EIP:
+     *valp = ui->prstatus->pr_reg.r_eip;
+     break;
+  case UNW_X86_EFLAGS:
+     *valp = ui->prstatus->pr_reg.r_eflags;
+     break;
+  case UNW_X86_TRAPNO:
+     *valp = ui->prstatus->pr_reg.r_trapno;
+     break;
+  default:
+      Debug(0, "bad regnum:%d\n", regnum);
+      return -UNW_EINVAL;
+  }
+#elif defined(UNW_TARGET_X86_64)
+  switch (regnum) {
+  case UNW_X86_64_RAX:
+     *valp = ui->prstatus->pr_reg.r_rax;
+     break;
+  case UNW_X86_64_RDX:
+     *valp = ui->prstatus->pr_reg.r_rdx;
+     break;
+  case UNW_X86_64_RCX:
+     *valp = ui->prstatus->pr_reg.r_rcx;
+     break;
+  case UNW_X86_64_RBX:
+     *valp = ui->prstatus->pr_reg.r_rbx;
+     break;
+  case UNW_X86_64_RSI:
+     *valp = ui->prstatus->pr_reg.r_rsi;
+     break;
+  case UNW_X86_64_RDI:
+     *valp = ui->prstatus->pr_reg.r_rdi;
+     break;
+  case UNW_X86_64_RBP:
+     *valp = ui->prstatus->pr_reg.r_rbp;
+     break;
+  case UNW_X86_64_RSP:
+     *valp = ui->prstatus->pr_reg.r_rsp;
+     break;
+  case UNW_X86_64_RIP:
+     *valp = ui->prstatus->pr_reg.r_rip;
+     break;
+  default:
+      Debug(0, "bad regnum:%d\n", regnum);
+      return -UNW_EINVAL;
+  }
+#elif defined(UNW_TARGET_ARM)
+  if (regnum >= UNW_ARM_R0 && regnum <= UNW_ARM_R12) {
+     *valp = ui->prstatus->pr_reg.r[regnum];
+  } else {
+     switch (regnum) {
+     case UNW_ARM_R13:
+       *valp = ui->prstatus->pr_reg.r_sp;
+       break;
+     case UNW_ARM_R14:
+       *valp = ui->prstatus->pr_reg.r_lr;
+       break;
+     case UNW_ARM_R15:
+       *valp = ui->prstatus->pr_reg.r_pc;
+       break;
+     default:
+       Debug(0, "bad regnum:%d\n", regnum);
+       return -UNW_EINVAL;
+     }
+  }
+#elif defined(UNW_TARGET_AARCH64)
+  if (regnum >= UNW_AARCH64_X0 && regnum < UNW_AARCH64_X30) {
+     *valp = ui->prstatus->pr_reg.x[regnum];
+  } else {
+     switch (regnum) {
+     case UNW_AARCH64_SP:
+       *valp = ui->prstatus->pr_reg.sp;
+       break;
+     case UNW_AARCH64_X30:
+       *valp = ui->prstatus->pr_reg.lr;
+       break;
+     case UNW_AARCH64_PC:
+       *valp = ui->prstatus->pr_reg.elr;
+       break;
+     default:
+       Debug(0, "bad regnum:%d\n", regnum);
+       return -UNW_EINVAL;
+     }
+  }
+
+#else
+#error Port me
+#endif
+
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/coredump/_UCD_access_reg_linux.c b/src/third_party/unwind/dist/src/coredump/_UCD_access_reg_linux.c
new file mode 100644
index 00000000000..43792f849b3
--- /dev/null
+++ b/src/third_party/unwind/dist/src/coredump/_UCD_access_reg_linux.c
@@ -0,0 +1,149 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "_UCD_lib.h"
+
+#include "_UCD_internal.h"
+
+int
+_UCD_access_reg (unw_addr_space_t as,
+                                unw_regnum_t regnum, unw_word_t *valp,
+                                int write, void *arg)
+{
+  struct UCD_info *ui = arg;
+
+  if (write)
+    {
+      Debug(0, "write is not supported\n");
+      return -UNW_EINVAL;
+    }
+
+  if (regnum < 0)
+    goto badreg;
+
+#if defined(UNW_TARGET_AARCH64)
+  if (regnum >= UNW_AARCH64_FPCR)
+    goto badreg;
+#elif defined(UNW_TARGET_ARM)
+  if (regnum >= 16)
+    goto badreg;
+#elif defined(UNW_TARGET_SH)
+  if (regnum > UNW_SH_PR)
+    goto badreg;
+#elif defined(UNW_TARGET_TILEGX)
+  if (regnum > UNW_TILEGX_CFA)
+    goto badreg;
+#elif defined(UNW_TARGET_S390X)
+  if (regnum > UNW_S390X_R15)
+    goto badreg;
+#else
+#if defined(UNW_TARGET_MIPS)
+  static const uint8_t remap_regs[] =
+    {
+      [UNW_MIPS_R0]  = EF_REG0,
+      [UNW_MIPS_R1]  = EF_REG1,
+      [UNW_MIPS_R2]  = EF_REG2,
+      [UNW_MIPS_R3]  = EF_REG3,
+      [UNW_MIPS_R4]  = EF_REG4,
+      [UNW_MIPS_R5]  = EF_REG5,
+      [UNW_MIPS_R6]  = EF_REG6,
+      [UNW_MIPS_R7]  = EF_REG7,
+      [UNW_MIPS_R8]  = EF_REG8,
+      [UNW_MIPS_R9]  = EF_REG9,
+      [UNW_MIPS_R10] = EF_REG10,
+      [UNW_MIPS_R11] = EF_REG11,
+      [UNW_MIPS_R12] = EF_REG12,
+      [UNW_MIPS_R13] = EF_REG13,
+      [UNW_MIPS_R14] = EF_REG14,
+      [UNW_MIPS_R15] = EF_REG15,
+      [UNW_MIPS_R16] = EF_REG16,
+      [UNW_MIPS_R17] = EF_REG17,
+      [UNW_MIPS_R18] = EF_REG18,
+      [UNW_MIPS_R19] = EF_REG19,
+      [UNW_MIPS_R20] = EF_REG20,
+      [UNW_MIPS_R21] = EF_REG21,
+      [UNW_MIPS_R22] = EF_REG22,
+      [UNW_MIPS_R23] = EF_REG23,
+      [UNW_MIPS_R24] = EF_REG24,
+      [UNW_MIPS_R25] = EF_REG25,
+      [UNW_MIPS_R28] = EF_REG28,
+      [UNW_MIPS_R29] = EF_REG29,
+      [UNW_MIPS_R30] = EF_REG30,
+      [UNW_MIPS_R31] = EF_REG31,
+      [UNW_MIPS_PC]  = EF_CP0_EPC,
+    };
+#elif defined(UNW_TARGET_X86)
+  static const uint8_t remap_regs[] =
+    {
+      /* names from libunwind-x86.h */
+      [UNW_X86_EAX]    = offsetof(struct user_regs_struct, eax) / sizeof(long),
+      [UNW_X86_EDX]    = offsetof(struct user_regs_struct, edx) / sizeof(long),
+      [UNW_X86_ECX]    = offsetof(struct user_regs_struct, ecx) / sizeof(long),
+      [UNW_X86_EBX]    = offsetof(struct user_regs_struct, ebx) / sizeof(long),
+      [UNW_X86_ESI]    = offsetof(struct user_regs_struct, esi) / sizeof(long),
+      [UNW_X86_EDI]    = offsetof(struct user_regs_struct, edi) / sizeof(long),
+      [UNW_X86_EBP]    = offsetof(struct user_regs_struct, ebp) / sizeof(long),
+      [UNW_X86_ESP]    = offsetof(struct user_regs_struct, esp) / sizeof(long),
+      [UNW_X86_EIP]    = offsetof(struct user_regs_struct, eip) / sizeof(long),
+      [UNW_X86_EFLAGS] = offsetof(struct user_regs_struct, eflags) / sizeof(long),
+      [UNW_X86_TRAPNO] = offsetof(struct user_regs_struct, orig_eax) / sizeof(long),
+    };
+#elif defined(UNW_TARGET_X86_64)
+  static const int8_t remap_regs[] =
+    {
+      [UNW_X86_64_RAX]    = offsetof(struct user_regs_struct, rax) / sizeof(long),
+      [UNW_X86_64_RDX]    = offsetof(struct user_regs_struct, rdx) / sizeof(long),
+      [UNW_X86_64_RCX]    = offsetof(struct user_regs_struct, rcx) / sizeof(long),
+      [UNW_X86_64_RBX]    = offsetof(struct user_regs_struct, rbx) / sizeof(long),
+      [UNW_X86_64_RSI]    = offsetof(struct user_regs_struct, rsi) / sizeof(long),
+      [UNW_X86_64_RDI]    = offsetof(struct user_regs_struct, rdi) / sizeof(long),
+      [UNW_X86_64_RBP]    = offsetof(struct user_regs_struct, rbp) / sizeof(long),
+      [UNW_X86_64_RSP]    = offsetof(struct user_regs_struct, rsp) / sizeof(long),
+      [UNW_X86_64_RIP]    = offsetof(struct user_regs_struct, rip) / sizeof(long),
+    };
+#else
+#error Port me
+#endif
+
+  if (regnum >= (unw_regnum_t)ARRAY_SIZE(remap_regs))
+    goto badreg;
+
+  regnum = remap_regs[regnum];
+#endif
+
+  /* pr_reg is a long[] array, but it contains struct user_regs_struct's
+   * image.
+   */
+  Debug(1, "pr_reg[%d]:%ld (0x%lx)\n", regnum,
+                (long)ui->prstatus->pr_reg[regnum],
+                (long)ui->prstatus->pr_reg[regnum]
+  );
+  *valp = ui->prstatus->pr_reg[regnum];
+
+  return 0;
+
+badreg:
+  Debug(0, "bad regnum:%d\n", regnum);
+  return -UNW_EINVAL;
+}
diff --git a/src/third_party/unwind/dist/src/coredump/_UCD_accessors.c b/src/third_party/unwind/dist/src/coredump/_UCD_accessors.c
new file mode 100644
index 00000000000..ae5c23d2194
--- /dev/null
+++ b/src/third_party/unwind/dist/src/coredump/_UCD_accessors.c
@@ -0,0 +1,36 @@
+/* libunwind - a platform-independent unwind library
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "_UCD_internal.h"
+
+unw_accessors_t _UCD_accessors =
+  {
+    .find_proc_info             = _UCD_find_proc_info,
+    .put_unwind_info            = _UCD_put_unwind_info,
+    .get_dyn_info_list_addr     = _UCD_get_dyn_info_list_addr,
+    .access_mem                 = _UCD_access_mem,
+    .access_reg                 = _UCD_access_reg,
+    .access_fpreg               = _UCD_access_fpreg,
+    .resume                     = _UCD_resume,
+    .get_proc_name              = _UCD_get_proc_name
+  };
diff --git a/src/third_party/unwind/dist/src/coredump/_UCD_create.c b/src/third_party/unwind/dist/src/coredump/_UCD_create.c
new file mode 100644
index 00000000000..62f6ee05c79
--- /dev/null
+++ b/src/third_party/unwind/dist/src/coredump/_UCD_create.c
@@ -0,0 +1,417 @@
+/* libunwind - a platform-independent unwind library
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+/* Endian detection */
+#include <limits.h>
+#if defined(HAVE_BYTESWAP_H)
+#include <byteswap.h>
+#endif
+#if defined(HAVE_ENDIAN_H)
+# include <endian.h>
+#elif defined(HAVE_SYS_ENDIAN_H)
+# include <sys/endian.h>
+#endif
+#if defined(__BYTE_ORDER) && __BYTE_ORDER == __BIG_ENDIAN
+# define WE_ARE_BIG_ENDIAN    1
+# define WE_ARE_LITTLE_ENDIAN 0
+#elif defined(__BYTE_ORDER) && __BYTE_ORDER == __LITTLE_ENDIAN
+# define WE_ARE_BIG_ENDIAN    0
+# define WE_ARE_LITTLE_ENDIAN 1
+#elif defined(_BYTE_ORDER) && _BYTE_ORDER == _BIG_ENDIAN
+# define WE_ARE_BIG_ENDIAN    1
+# define WE_ARE_LITTLE_ENDIAN 0
+#elif defined(_BYTE_ORDER) && _BYTE_ORDER == _LITTLE_ENDIAN
+# define WE_ARE_BIG_ENDIAN    0
+# define WE_ARE_LITTLE_ENDIAN 1
+#elif defined(BYTE_ORDER) && BYTE_ORDER == BIG_ENDIAN
+# define WE_ARE_BIG_ENDIAN    1
+# define WE_ARE_LITTLE_ENDIAN 0
+#elif defined(BYTE_ORDER) && BYTE_ORDER == LITTLE_ENDIAN
+# define WE_ARE_BIG_ENDIAN    0
+# define WE_ARE_LITTLE_ENDIAN 1
+#elif defined(__386__)
+# define WE_ARE_BIG_ENDIAN    0
+# define WE_ARE_LITTLE_ENDIAN 1
+#else
+# error "Can't determine endianness"
+#endif
+
+#include <elf.h>
+#include <sys/procfs.h> /* struct elf_prstatus */
+
+#include "_UCD_lib.h"
+#include "_UCD_internal.h"
+
+#define NOTE_DATA(_hdr) STRUCT_MEMBER_P((_hdr), sizeof (Elf32_Nhdr) + UNW_ALIGN((_hdr)->n_namesz, 4))
+#define NOTE_SIZE(_hdr) (sizeof (Elf32_Nhdr) + UNW_ALIGN((_hdr)->n_namesz, 4) + UNW_ALIGN((_hdr)->n_descsz, 4))
+#define NOTE_NEXT(_hdr) STRUCT_MEMBER_P((_hdr), NOTE_SIZE(_hdr))
+#define NOTE_FITS_IN(_hdr, _size) ((_size) >= sizeof (Elf32_Nhdr) && (_size) >= NOTE_SIZE (_hdr))
+#define NOTE_FITS(_hdr, _end) NOTE_FITS_IN((_hdr), (unsigned long)((char *)(_end) - (char *)(_hdr)))
+
+struct UCD_info *
+_UCD_create(const char *filename)
+{
+  union
+    {
+      Elf32_Ehdr h32;
+      Elf64_Ehdr h64;
+    } elf_header;
+#define elf_header32 elf_header.h32
+#define elf_header64 elf_header.h64
+  bool _64bits;
+
+  struct UCD_info *ui = memset(malloc(sizeof(*ui)), 0, sizeof(*ui));
+  ui->edi.di_cache.format = -1;
+  ui->edi.di_debug.format = -1;
+#if UNW_TARGET_IA64
+  ui->edi.ktab.format = -1;
+#endif
+
+  int fd = ui->coredump_fd = open(filename, O_RDONLY);
+  if (fd < 0)
+    goto err;
+  ui->coredump_filename = strdup(filename);
+
+  /* No sane ELF32 file is going to be smaller then ELF64 _header_,
+   * so let's just read 64-bit sized one.
+   */
+  if (read(fd, &elf_header64, sizeof(elf_header64)) != sizeof(elf_header64))
+    {
+      Debug(0, "'%s' is not an ELF file\n", filename);
+      goto err;
+    }
+
+  if (memcmp(&elf_header32, ELFMAG, SELFMAG) != 0)
+    {
+      Debug(0, "'%s' is not an ELF file\n", filename);
+      goto err;
+    }
+
+  if (elf_header32.e_ident[EI_CLASS] != ELFCLASS32
+   && elf_header32.e_ident[EI_CLASS] != ELFCLASS64)
+    {
+      Debug(0, "'%s' is not a 32/64 bit ELF file\n", filename);
+      goto err;
+    }
+
+  if (WE_ARE_LITTLE_ENDIAN != (elf_header32.e_ident[EI_DATA] == ELFDATA2LSB))
+    {
+      Debug(0, "'%s' is endian-incompatible\n", filename);
+      goto err;
+    }
+
+  _64bits = (elf_header32.e_ident[EI_CLASS] == ELFCLASS64);
+  if (_64bits && sizeof(elf_header64.e_entry) > sizeof(off_t))
+    {
+      Debug(0, "Can't process '%s': 64-bit file "
+               "while only %ld bits are supported",
+            filename, 8L * sizeof(off_t));
+      goto err;
+    }
+
+  /* paranoia check */
+  if (_64bits
+            ? 0 /* todo: (elf_header64.e_ehsize != NN || elf_header64.e_phentsize != NN) */
+            : (elf_header32.e_ehsize != 52 || elf_header32.e_phentsize != 32)
+  )
+    {
+      Debug(0, "'%s' has wrong e_ehsize or e_phentsize\n", filename);
+      goto err;
+    }
+
+  off_t ofs = (_64bits ? elf_header64.e_phoff : elf_header32.e_phoff);
+  if (lseek(fd, ofs, SEEK_SET) != ofs)
+    {
+      Debug(0, "Can't read phdrs from '%s'\n", filename);
+      goto err;
+    }
+  unsigned size = ui->phdrs_count = (_64bits ? elf_header64.e_phnum : elf_header32.e_phnum);
+  coredump_phdr_t *phdrs = ui->phdrs = memset(malloc(size * sizeof(phdrs[0])), 0, size * sizeof(phdrs[0]));
+  if (_64bits)
+    {
+      coredump_phdr_t *cur = phdrs;
+      unsigned i = 0;
+      while (i < size)
+        {
+          Elf64_Phdr hdr64;
+          if (read(fd, &hdr64, sizeof(hdr64)) != sizeof(hdr64))
+            {
+              Debug(0, "Can't read phdrs from '%s'\n", filename);
+              goto err;
+            }
+          cur->p_type   = hdr64.p_type  ;
+          cur->p_flags  = hdr64.p_flags ;
+          cur->p_offset = hdr64.p_offset;
+          cur->p_vaddr  = hdr64.p_vaddr ;
+          /*cur->p_paddr  = hdr32.p_paddr ; always 0 */
+//TODO: check that and abort if it isn't?
+          cur->p_filesz = hdr64.p_filesz;
+          cur->p_memsz  = hdr64.p_memsz ;
+          cur->p_align  = hdr64.p_align ;
+          /* cur->backing_filename = NULL; - done by memset */
+          cur->backing_fd = -1;
+          cur->backing_filesize = hdr64.p_filesz;
+          i++;
+          cur++;
+        }
+    } else {
+      coredump_phdr_t *cur = phdrs;
+      unsigned i = 0;
+      while (i < size)
+        {
+          Elf32_Phdr hdr32;
+          if (read(fd, &hdr32, sizeof(hdr32)) != sizeof(hdr32))
+            {
+              Debug(0, "Can't read phdrs from '%s'\n", filename);
+              goto err;
+            }
+          cur->p_type   = hdr32.p_type  ;
+          cur->p_flags  = hdr32.p_flags ;
+          cur->p_offset = hdr32.p_offset;
+          cur->p_vaddr  = hdr32.p_vaddr ;
+          /*cur->p_paddr  = hdr32.p_paddr ; always 0 */
+          cur->p_filesz = hdr32.p_filesz;
+          cur->p_memsz  = hdr32.p_memsz ;
+          cur->p_align  = hdr32.p_align ;
+          /* cur->backing_filename = NULL; - done by memset */
+          cur->backing_fd = -1;
+          cur->backing_filesize = hdr32.p_memsz;
+          i++;
+          cur++;
+        }
+    }
+
+    unsigned i = 0;
+    coredump_phdr_t *cur = phdrs;
+    while (i < size)
+      {
+        Debug(2, "phdr[%03d]: type:%d", i, cur->p_type);
+        if (cur->p_type == PT_NOTE)
+          {
+            Elf32_Nhdr *note_hdr, *note_end;
+            unsigned n_threads;
+
+            ui->note_phdr = malloc(cur->p_filesz);
+            if (lseek(fd, cur->p_offset, SEEK_SET) != (off_t)cur->p_offset
+             || (uoff_t)read(fd, ui->note_phdr, cur->p_filesz) != cur->p_filesz)
+              {
+                    Debug(0, "Can't read PT_NOTE from '%s'\n", filename);
+                    goto err;
+              }
+
+            note_end = STRUCT_MEMBER_P (ui->note_phdr, cur->p_filesz);
+
+            /* Count number of threads */
+            n_threads = 0;
+            note_hdr = (Elf32_Nhdr *)ui->note_phdr;
+            while (NOTE_FITS (note_hdr, note_end))
+              {
+                if (note_hdr->n_type == NT_PRSTATUS)
+                  n_threads++;
+
+                note_hdr = NOTE_NEXT (note_hdr);
+              }
+
+            ui->n_threads = n_threads;
+            ui->threads = malloc(sizeof (void *) * n_threads);
+
+            n_threads = 0;
+            note_hdr = (Elf32_Nhdr *)ui->note_phdr;
+            while (NOTE_FITS (note_hdr, note_end))
+              {
+                if (note_hdr->n_type == NT_PRSTATUS)
+                  ui->threads[n_threads++] = NOTE_DATA (note_hdr);
+
+                note_hdr = NOTE_NEXT (note_hdr);
+              }
+          }
+        if (cur->p_type == PT_LOAD)
+          {
+            Debug(2, " ofs:%08llx va:%08llx filesize:%08llx memsize:%08llx flg:%x",
+                                (unsigned long long) cur->p_offset,
+                                (unsigned long long) cur->p_vaddr,
+                                (unsigned long long) cur->p_filesz,
+                                (unsigned long long) cur->p_memsz,
+                                cur->p_flags
+            );
+            if (cur->p_filesz < cur->p_memsz)
+              Debug(2, " partial");
+            if (cur->p_flags & PF_X)
+              Debug(2, " executable");
+          }
+        Debug(2, "\n");
+        i++;
+        cur++;
+      }
+
+    if (ui->n_threads == 0)
+      {
+        Debug(0, "No NT_PRSTATUS note found in '%s'\n", filename);
+        goto err;
+      }
+
+    ui->prstatus = ui->threads[0];
+
+  return ui;
+
+ err:
+  _UCD_destroy(ui);
+  return NULL;
+}
+
+int _UCD_get_num_threads(struct UCD_info *ui)
+{
+  return ui->n_threads;
+}
+
+void _UCD_select_thread(struct UCD_info *ui, int n)
+{
+  if (n >= 0 && n < ui->n_threads)
+    ui->prstatus = ui->threads[n];
+}
+
+pid_t _UCD_get_pid(struct UCD_info *ui)
+{
+  return ui->prstatus->pr_pid;
+}
+
+int _UCD_get_cursig(struct UCD_info *ui)
+{
+  return ui->prstatus->pr_cursig;
+}
+
+int _UCD_add_backing_file_at_segment(struct UCD_info *ui, int phdr_no, const char *filename)
+{
+  if ((unsigned)phdr_no >= ui->phdrs_count)
+    {
+      Debug(0, "There is no segment %d in this coredump\n", phdr_no);
+      return -1;
+    }
+
+  struct coredump_phdr *phdr = &ui->phdrs[phdr_no];
+  if (phdr->backing_filename)
+    {
+      Debug(0, "Backing file already added to segment %d\n", phdr_no);
+      return -1;
+    }
+
+  int fd = open(filename, O_RDONLY);
+  if (fd < 0)
+    {
+      Debug(0, "Can't open '%s'\n", filename);
+      return -1;
+    }
+
+  phdr->backing_fd = fd;
+  phdr->backing_filename = strdup(filename);
+
+  struct stat statbuf;
+  if (fstat(fd, &statbuf) != 0)
+    {
+      Debug(0, "Can't stat '%s'\n", filename);
+      goto err;
+    }
+  phdr->backing_filesize = (uoff_t)statbuf.st_size;
+
+  if (phdr->p_flags != (PF_X | PF_R))
+    Debug(1, "Note: phdr[%u] is not r-x: flags are 0x%x\n", phdr_no, phdr->p_flags);
+
+  if (phdr->backing_filesize > phdr->p_memsz)
+    {
+      /* This is expected */
+      Debug(2, "Note: phdr[%u] is %lld bytes, file is larger: %lld bytes\n",
+                        phdr_no,
+                        (unsigned long long)phdr->p_memsz,
+                        (unsigned long long)phdr->backing_filesize
+      );
+    }
+//TODO: else loudly complain? Maybe even fail?
+
+  if (phdr->p_filesz != 0)
+    {
+//TODO: loop and compare in smaller blocks
+      char *core_buf = malloc(phdr->p_filesz);
+      char *file_buf = malloc(phdr->p_filesz);
+      if (lseek(ui->coredump_fd, phdr->p_offset, SEEK_SET) != (off_t)phdr->p_offset
+       || (uoff_t)read(ui->coredump_fd, core_buf, phdr->p_filesz) != phdr->p_filesz
+      )
+        {
+          Debug(0, "Error reading from coredump file\n");
+ err_read:
+          free(core_buf);
+          free(file_buf);
+          goto err;
+        }
+      if ((uoff_t)read(fd, file_buf, phdr->p_filesz) != phdr->p_filesz)
+        {
+          Debug(0, "Error reading from '%s'\n", filename);
+          goto err_read;
+        }
+      int r = memcmp(core_buf, file_buf, phdr->p_filesz);
+      free(core_buf);
+      free(file_buf);
+      if (r != 0)
+        {
+          Debug(1, "Note: phdr[%u] first %lld bytes in core dump and in file do not match\n",
+                                phdr_no, (unsigned long long)phdr->p_filesz
+          );
+        } else {
+          Debug(1, "Note: phdr[%u] first %lld bytes in core dump and in file match\n",
+                                phdr_no, (unsigned long long)phdr->p_filesz
+          );
+        }
+    }
+
+  /* Success */
+  return 0;
+
+ err:
+  if (phdr->backing_fd >= 0)
+    {
+      close(phdr->backing_fd);
+      phdr->backing_fd = -1;
+    }
+  free(phdr->backing_filename);
+  phdr->backing_filename = NULL;
+  return -1;
+}
+
+int _UCD_add_backing_file_at_vaddr(struct UCD_info *ui,
+                                   unsigned long vaddr,
+                                   const char *filename)
+{
+  unsigned i;
+  for (i = 0; i < ui->phdrs_count; i++)
+    {
+      struct coredump_phdr *phdr = &ui->phdrs[i];
+      if (phdr->p_vaddr != vaddr)
+        continue;
+      /* It seems to match. Add it. */
+      return _UCD_add_backing_file_at_segment(ui, i, filename);
+    }
+  return -1;
+}
diff --git a/src/third_party/unwind/dist/src/coredump/_UCD_destroy.c b/src/third_party/unwind/dist/src/coredump/_UCD_destroy.c
new file mode 100644
index 00000000000..ddc36ec8986
--- /dev/null
+++ b/src/third_party/unwind/dist/src/coredump/_UCD_destroy.c
@@ -0,0 +1,52 @@
+/* libunwind - a platform-independent unwind library
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "_UCD_internal.h"
+
+void
+_UCD_destroy (struct UCD_info *ui)
+{
+  if (!ui)
+    return;
+
+  if (ui->coredump_fd >= 0)
+    close(ui->coredump_fd);
+  free(ui->coredump_filename);
+
+  invalidate_edi (&ui->edi);
+
+  unsigned i;
+  for (i = 0; i < ui->phdrs_count; i++)
+    {
+      struct coredump_phdr *phdr = &ui->phdrs[i];
+      free(phdr->backing_filename);
+      if (phdr->backing_fd >= 0)
+        close(phdr->backing_fd);
+    }
+
+  free(ui->phdrs);
+  free(ui->note_phdr);
+  free(ui->threads);
+
+  free(ui);
+}
diff --git a/src/third_party/unwind/dist/src/coredump/_UCD_elf_map_image.c b/src/third_party/unwind/dist/src/coredump/_UCD_elf_map_image.c
new file mode 100644
index 00000000000..4b3db0bbff7
--- /dev/null
+++ b/src/third_party/unwind/dist/src/coredump/_UCD_elf_map_image.c
@@ -0,0 +1,98 @@
+/* libunwind - a platform-independent unwind library
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <elf.h>
+
+#include "_UCD_lib.h"
+#include "_UCD_internal.h"
+
+static coredump_phdr_t *
+CD_elf_map_image(struct UCD_info *ui, coredump_phdr_t *phdr)
+{
+  struct elf_image *ei = &ui->edi.ei;
+
+  if (phdr->backing_fd < 0)
+    {
+      /* Note: coredump file contains only phdr->p_filesz bytes.
+       * We want to map bigger area (phdr->p_memsz bytes) to make sure
+       * these pages are allocated, but non-accessible.
+       */
+      /* addr, length, prot, flags, fd, fd_offset */
+      ei->image = mmap(NULL, phdr->p_memsz, PROT_READ, MAP_PRIVATE, ui->coredump_fd, phdr->p_offset);
+      if (ei->image == MAP_FAILED)
+        {
+          ei->image = NULL;
+          return NULL;
+        }
+      ei->size = phdr->p_filesz;
+      size_t remainder_len = phdr->p_memsz - phdr->p_filesz;
+      if (remainder_len > 0)
+        {
+          void *remainder_base = (char*) ei->image + phdr->p_filesz;
+          munmap(remainder_base, remainder_len);
+        }
+    } else {
+      /* We have a backing file for this segment.
+       * This file is always longer than phdr->p_memsz,
+       * and if phdr->p_filesz !=0, first phdr->p_filesz bytes in coredump
+       * are the same as first bytes in the file. (Thus no need to map coredump)
+       * We map the entire file:
+       * unwinding may need data which is past phdr->p_memsz bytes.
+       */
+      /* addr, length, prot, flags, fd, fd_offset */
+      ei->image = mmap(NULL, phdr->backing_filesize, PROT_READ, MAP_PRIVATE, phdr->backing_fd, 0);
+      if (ei->image == MAP_FAILED)
+        {
+          ei->image = NULL;
+          return NULL;
+        }
+      ei->size = phdr->backing_filesize;
+    }
+
+  /* Check ELF header for sanity */
+  if (!elf_w(valid_object)(ei))
+    {
+      munmap(ei->image, ei->size);
+      ei->image = NULL;
+      ei->size = 0;
+      return NULL;
+    }
+
+  return phdr;
+}
+
+HIDDEN coredump_phdr_t *
+_UCD_get_elf_image(struct UCD_info *ui, unw_word_t ip)
+{
+  unsigned i;
+  for (i = 0; i < ui->phdrs_count; i++)
+    {
+      coredump_phdr_t *phdr = &ui->phdrs[i];
+      if (phdr->p_vaddr <= ip && ip < phdr->p_vaddr + phdr->p_memsz)
+        {
+          phdr = CD_elf_map_image(ui, phdr);
+          return phdr;
+        }
+    }
+  return NULL;
+}
diff --git a/src/third_party/unwind/dist/src/coredump/_UCD_find_proc_info.c b/src/third_party/unwind/dist/src/coredump/_UCD_find_proc_info.c
new file mode 100644
index 00000000000..33b66c8edbe
--- /dev/null
+++ b/src/third_party/unwind/dist/src/coredump/_UCD_find_proc_info.c
@@ -0,0 +1,163 @@
+/* libunwind - a platform-independent unwind library
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <elf.h>
+
+#include "_UCD_lib.h"
+#include "_UCD_internal.h"
+
+static int
+get_unwind_info(struct UCD_info *ui, unw_addr_space_t as, unw_word_t ip)
+{
+  unsigned long segbase, mapoff;
+
+#if UNW_TARGET_IA64 && defined(__linux)
+  if (!ui->edi.ktab.start_ip && _Uia64_get_kernel_table (&ui->edi.ktab) < 0)
+    return -UNW_ENOINFO;
+
+  if (ui->edi.ktab.format != -1 && ip >= ui->edi.ktab.start_ip && ip < ui->edi.ktab.end_ip)
+    return 0;
+#endif
+
+  if ((ui->edi.di_cache.format != -1
+       && ip >= ui->edi.di_cache.start_ip && ip < ui->edi.di_cache.end_ip)
+#if UNW_TARGET_ARM
+      || (ui->edi.di_debug.format != -1
+       && ip >= ui->edi.di_arm.start_ip && ip < ui->edi.di_arm.end_ip)
+#endif
+      || (ui->edi.di_debug.format != -1
+       && ip >= ui->edi.di_debug.start_ip && ip < ui->edi.di_debug.end_ip))
+    return 0;
+
+  invalidate_edi (&ui->edi);
+
+  /* Used to be tdep_get_elf_image() in ptrace unwinding code */
+  coredump_phdr_t *phdr = _UCD_get_elf_image(ui, ip);
+  if (!phdr)
+    {
+      Debug(1, "returns error: _UCD_get_elf_image failed\n");
+      return -UNW_ENOINFO;
+    }
+  /* segbase: where it is mapped in virtual memory */
+  /* mapoff: offset in the file */
+  segbase = phdr->p_vaddr;
+  /*mapoff  = phdr->p_offset; WRONG! phdr->p_offset is the offset in COREDUMP file */
+  mapoff  = 0;
+///FIXME. text segment is USUALLY, not always, at offset 0 in the binary/.so file.
+// ensure that at initialization.
+
+  /* Here, SEGBASE is the starting-address of the (mmap'ped) segment
+     which covers the IP we're looking for.  */
+  if (tdep_find_unwind_table(&ui->edi, as, phdr->backing_filename, segbase, mapoff, ip) < 0)
+    {
+      Debug(1, "returns error: tdep_find_unwind_table failed\n");
+      return -UNW_ENOINFO;
+    }
+
+  /* This can happen in corner cases where dynamically generated
+     code falls into the same page that contains the data-segment
+     and the page-offset of the code is within the first page of
+     the executable.  */
+  if (ui->edi.di_cache.format != -1
+      && (ip < ui->edi.di_cache.start_ip || ip >= ui->edi.di_cache.end_ip))
+     ui->edi.di_cache.format = -1;
+
+  if (ui->edi.di_debug.format != -1
+      && (ip < ui->edi.di_debug.start_ip || ip >= ui->edi.di_debug.end_ip))
+     ui->edi.di_debug.format = -1;
+
+  if (ui->edi.di_cache.format == -1
+#if UNW_TARGET_ARM
+      && ui->edi.di_arm.format == -1
+#endif
+      && ui->edi.di_debug.format == -1)
+  {
+    Debug(1, "returns error: all formats are -1\n");
+    return -UNW_ENOINFO;
+  }
+
+  Debug(1, "returns success\n");
+  return 0;
+}
+
+int
+_UCD_find_proc_info (unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi,
+                     int need_unwind_info, void *arg)
+{
+  struct UCD_info *ui = arg;
+
+  Debug(1, "entering\n");
+
+  int ret = -UNW_ENOINFO;
+
+  if (get_unwind_info(ui, as, ip) < 0) {
+    Debug(1, "returns error: get_unwind_info failed\n");
+    return -UNW_ENOINFO;
+  }
+
+#if UNW_TARGET_IA64
+  if (ui->edi.ktab.format != -1)
+    {
+      /* The kernel unwind table resides in local memory, so we have
+         to use the local address space to search it.  Since
+         _UCD_put_unwind_info() has no easy way of detecting this
+         case, we simply make a copy of the unwind-info, so
+         _UCD_put_unwind_info() can always free() the unwind-info
+         without ill effects.  */
+      ret = tdep_search_unwind_table (unw_local_addr_space, ip, &ui->edi.ktab, pi,
+                                      need_unwind_info, arg);
+      if (ret >= 0)
+        {
+          if (!need_unwind_info)
+            pi->unwind_info = NULL;
+          else
+            {
+              void *mem = malloc (pi->unwind_info_size);
+
+              if (!mem)
+                return -UNW_ENOMEM;
+              memcpy (mem, pi->unwind_info, pi->unwind_info_size);
+              pi->unwind_info = mem;
+            }
+        }
+    }
+#endif
+
+  if (ret == -UNW_ENOINFO && ui->edi.di_cache.format != -1)
+    ret = tdep_search_unwind_table (as, ip, &ui->edi.di_cache,
+                                    pi, need_unwind_info, arg);
+
+#if UNW_TARGET_ARM
+  if (ret == -UNW_ENOINFO && ui->edi.di_arm.format != -1)
+    ret = tdep_search_unwind_table (as, ip, &ui->edi.di_arm, pi,
+                                    need_unwind_info, arg);
+#endif
+
+  if (ret == -UNW_ENOINFO && ui->edi.di_debug.format != -1)
+    ret = tdep_search_unwind_table (as, ip, &ui->edi.di_debug, pi,
+                                    need_unwind_info, arg);
+
+  Debug(1, "returns %d\n", ret);
+
+  return ret;
+}
diff --git a/src/third_party/unwind/dist/src/coredump/_UCD_get_proc_name.c b/src/third_party/unwind/dist/src/coredump/_UCD_get_proc_name.c
new file mode 100644
index 00000000000..00096c48d07
--- /dev/null
+++ b/src/third_party/unwind/dist/src/coredump/_UCD_get_proc_name.c
@@ -0,0 +1,70 @@
+/* libunwind - a platform-independent unwind library
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "_UCD_lib.h"
+#include "_UCD_internal.h"
+
+
+/* Find the ELF image that contains IP and return the "closest"
+   procedure name, if there is one.  With some caching, this could be
+   sped up greatly, but until an application materializes that's
+   sensitive to the performance of this routine, why bother...  */
+static int
+elf_w (CD_get_proc_name) (struct UCD_info *ui, unw_addr_space_t as, unw_word_t ip,
+                       char *buf, size_t buf_len, unw_word_t *offp)
+{
+  unsigned long segbase, mapoff;
+  int ret;
+
+  /* Used to be tdep_get_elf_image() in ptrace unwinding code */
+  coredump_phdr_t *cphdr = _UCD_get_elf_image(ui, ip);
+  if (!cphdr)
+    {
+      Debug(1, "returns error: _UCD_get_elf_image failed\n");
+      return -UNW_ENOINFO;
+    }
+  /* segbase: where it is mapped in virtual memory */
+  /* mapoff: offset in the file */
+  segbase = cphdr->p_vaddr;
+  /*mapoff  = phdr->p_offset; WRONG! phdr->p_offset is the offset in COREDUMP file */
+  mapoff  = 0;
+
+  ret = elf_w (get_proc_name_in_image) (as, &ui->edi.ei, segbase, mapoff, ip, buf, buf_len, offp);
+
+  return ret;
+}
+
+int
+_UCD_get_proc_name (unw_addr_space_t as, unw_word_t ip,
+                    char *buf, size_t buf_len, unw_word_t *offp, void *arg)
+{
+  struct UCD_info *ui = arg;
+
+#if ELF_CLASS == ELFCLASS64
+  return _Uelf64_CD_get_proc_name (ui, as, ip, buf, buf_len, offp);
+#elif ELF_CLASS == ELFCLASS32
+  return _Uelf32_CD_get_proc_name (ui, as, ip, buf, buf_len, offp);
+#else
+  return -UNW_ENOINFO;
+#endif
+}
diff --git a/src/third_party/unwind/dist/src/coredump/_UCD_internal.h b/src/third_party/unwind/dist/src/coredump/_UCD_internal.h
new file mode 100644
index 00000000000..3c95a2a0038
--- /dev/null
+++ b/src/third_party/unwind/dist/src/coredump/_UCD_internal.h
@@ -0,0 +1,105 @@
+/* libunwind - a platform-independent unwind library
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef _UCD_internal_h
+#define _UCD_internal_h
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_PROCFS_H
+#include <sys/procfs.h> /* struct elf_prstatus */
+#endif
+#include <errno.h>
+#include <string.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <libunwind-coredump.h>
+
+#include "libunwind_i.h"
+
+
+#if SIZEOF_OFF_T == 4
+typedef uint32_t uoff_t;
+#elif SIZEOF_OFF_T == 8
+typedef uint64_t uoff_t;
+#else
+# error Unknown size of off_t!
+#endif
+
+
+/* Similar to ELF phdrs. p_paddr element is absent,
+ * since it's always 0 in coredumps.
+ */
+struct coredump_phdr
+  {
+    uint32_t p_type;
+    uint32_t p_flags;
+    uoff_t   p_offset;
+    uoff_t   p_vaddr;
+    uoff_t   p_filesz;
+    uoff_t   p_memsz;
+    uoff_t   p_align;
+    /* Data for backing file. If backing_fd < 0, there is no file */
+    uoff_t   backing_filesize;
+    char    *backing_filename; /* for error meesages only */
+    int      backing_fd;
+  };
+
+typedef struct coredump_phdr coredump_phdr_t;
+
+#if defined(HAVE_STRUCT_ELF_PRSTATUS)
+#define PRSTATUS_STRUCT elf_prstatus
+#elif defined(HAVE_STRUCT_PRSTATUS)
+#define PRSTATUS_STRUCT prstatus
+#else
+#define PRSTATUS_STRUCT non_existent
+#endif
+
+struct UCD_info
+  {
+    int big_endian;  /* bool */
+    int coredump_fd;
+    char *coredump_filename; /* for error meesages only */
+    coredump_phdr_t *phdrs; /* array, allocated */
+    unsigned phdrs_count;
+    void *note_phdr; /* allocated or NULL */
+    struct PRSTATUS_STRUCT *prstatus; /* points inside note_phdr */
+    int n_threads;
+    struct PRSTATUS_STRUCT **threads;
+
+    struct elf_dyn_info edi;
+  };
+
+extern coredump_phdr_t * _UCD_get_elf_image(struct UCD_info *ui, unw_word_t ip);
+
+#define STRUCT_MEMBER_P(struct_p, struct_offset) ((void *) ((char*) (struct_p) + (long) (struct_offset)))
+#define STRUCT_MEMBER(member_type, struct_p, struct_offset) (*(member_type*) STRUCT_MEMBER_P ((struct_p), (struct_offset)))
+
+#endif
diff --git a/src/third_party/unwind/dist/src/coredump/_UCD_lib.h b/src/third_party/unwind/dist/src/coredump/_UCD_lib.h
new file mode 100644
index 00000000000..22be32ed1ef
--- /dev/null
+++ b/src/third_party/unwind/dist/src/coredump/_UCD_lib.h
@@ -0,0 +1,57 @@
+/* libunwind - a platform-independent unwind library
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef _UCD_lib_h
+#define _UCD_lib_h
+
+#include <assert.h>
+#include <ctype.h>
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <setjmp.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <string.h>
+#include <sys/poll.h>
+#include <sys/mman.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <termios.h>
+#include <time.h>
+#include <unistd.h>
+#include <stdbool.h>
+#include <limits.h>
+#include <sys/param.h>
+#include <pwd.h>
+#include <grp.h>
+#include <syslog.h>
+
+#endif
diff --git a/src/third_party/unwind/dist/src/coredump/_UPT_access_fpreg.c b/src/third_party/unwind/dist/src/coredump/_UPT_access_fpreg.c
new file mode 100644
index 00000000000..0b8b86ac907
--- /dev/null
+++ b/src/third_party/unwind/dist/src/coredump/_UPT_access_fpreg.c
@@ -0,0 +1,34 @@
+/* libunwind - a platform-independent unwind library
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "_UCD_lib.h"
+#include "_UCD_internal.h"
+
+int
+_UCD_access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val,
+                   int write, void *arg)
+{
+  print_error (__func__);
+  print_error (" not implemented\n");
+  return -UNW_EINVAL;
+}
diff --git a/src/third_party/unwind/dist/src/coredump/_UPT_elf.c b/src/third_party/unwind/dist/src/coredump/_UPT_elf.c
new file mode 100644
index 00000000000..fb7b19a7cbd
--- /dev/null
+++ b/src/third_party/unwind/dist/src/coredump/_UPT_elf.c
@@ -0,0 +1,5 @@
+/* We need to get a separate copy of the ELF-code into
+   libunwind-coredump since it cannot (and must not) have any ELF
+   dependencies on libunwind.  */
+#include "libunwind_i.h"        /* get ELFCLASS defined */
+#include "../elfxx.c"
diff --git a/src/third_party/unwind/dist/src/coredump/_UPT_get_dyn_info_list_addr.c b/src/third_party/unwind/dist/src/coredump/_UPT_get_dyn_info_list_addr.c
new file mode 100644
index 00000000000..0d11905566c
--- /dev/null
+++ b/src/third_party/unwind/dist/src/coredump/_UPT_get_dyn_info_list_addr.c
@@ -0,0 +1,108 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "_UCD_lib.h"
+#include "_UCD_internal.h"
+
+#if UNW_TARGET_IA64 && defined(__linux)
+# include "elf64.h"
+# include "os-linux.h"
+
+static inline int
+get_list_addr (unw_addr_space_t as, unw_word_t *dil_addr, void *arg,
+               int *countp)
+{
+  unsigned long lo, hi, off;
+  struct UPT_info *ui = arg;
+  struct map_iterator mi;
+  char path[PATH_MAX];
+  unw_dyn_info_t *di;
+  unw_word_t res;
+  int count = 0;
+
+  maps_init (&mi, ui->pid);
+  while (maps_next (&mi, &lo, &hi, &off))
+    {
+      if (off)
+        continue;
+
+      invalidate_edi (&ui->edi);
+
+      if (elf_map_image (&ui->ei, path) < 0)
+        /* ignore unmappable stuff like "/SYSV00001b58 (deleted)" */
+        continue;
+
+      Debug (16, "checking object %s\n", path);
+
+      di = tdep_find_unwind_table (&ui->edi, as, path, lo, off);
+      if (di)
+        {
+          res = _Uia64_find_dyn_list (as, di, arg);
+          if (res && count++ == 0)
+            {
+              Debug (12, "dyn_info_list_addr = 0x%lx\n", (long) res);
+              *dil_addr = res;
+            }
+        }
+    }
+  maps_close (&mi);
+  *countp = count;
+  return 0;
+}
+
+#else
+
+static inline int
+get_list_addr (unw_addr_space_t as, unw_word_t *dil_addr, void *arg,
+               int *countp)
+{
+# warning Implement get_list_addr(), please.
+  *countp = 0;
+  return 0;
+}
+
+#endif
+
+int
+_UCD_get_dyn_info_list_addr (unw_addr_space_t as, unw_word_t *dil_addr,
+                             void *arg)
+{
+  int count, ret;
+
+  Debug (12, "looking for dyn_info list\n");
+
+  if ((ret = get_list_addr (as, dil_addr, arg, &count)) < 0)
+    return ret;
+
+  /* If multiple dynamic-info list addresses are found, we would have
+     to determine which was is the one actually in use (since the
+     dynamic name resolution algorithm will pick one "winner").
+     Perhaps we'd have to track them all until we find one that's
+     non-empty.  Hopefully, this case simply will never arise, since
+     only libunwind defines the dynamic info list head. */
+  assert (count <= 1);
+
+  return (count > 0) ? 0 : -UNW_ENOINFO;
+}
diff --git a/src/third_party/unwind/dist/src/coredump/_UPT_put_unwind_info.c b/src/third_party/unwind/dist/src/coredump/_UPT_put_unwind_info.c
new file mode 100644
index 00000000000..462e1d048c3
--- /dev/null
+++ b/src/third_party/unwind/dist/src/coredump/_UPT_put_unwind_info.c
@@ -0,0 +1,36 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "_UCD_lib.h"
+#include "_UCD_internal.h"
+
+void
+_UCD_put_unwind_info (unw_addr_space_t as, unw_proc_info_t *pi, void *arg)
+{
+  if (!pi->unwind_info)
+    return;
+  free (pi->unwind_info);
+  pi->unwind_info = NULL;
+}
diff --git a/src/third_party/unwind/dist/src/coredump/_UPT_resume.c b/src/third_party/unwind/dist/src/coredump/_UPT_resume.c
new file mode 100644
index 00000000000..a729c908cb1
--- /dev/null
+++ b/src/third_party/unwind/dist/src/coredump/_UPT_resume.c
@@ -0,0 +1,35 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "_UCD_lib.h"
+#include "_UCD_internal.h"
+
+int
+_UCD_resume (unw_addr_space_t as, unw_cursor_t *c, void *arg)
+{
+  print_error (__func__);
+  print_error (" not implemented\n");
+  return -UNW_EINVAL;
+}
diff --git a/src/third_party/unwind/dist/src/coredump/libunwind-coredump.pc.in b/src/third_party/unwind/dist/src/coredump/libunwind-coredump.pc.in
new file mode 100644
index 00000000000..9cb62c086d2
--- /dev/null
+++ b/src/third_party/unwind/dist/src/coredump/libunwind-coredump.pc.in
@@ -0,0 +1,11 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: libunwind-coredump
+Description: libunwind coredump library
+Version: @VERSION@
+Requires: libunwind-generic libunwind
+Libs: -L${libdir} -lunwind-coredump
+Cflags: -I${includedir}
diff --git a/src/third_party/unwind/dist/src/dwarf/Gexpr.c b/src/third_party/unwind/dist/src/dwarf/Gexpr.c
new file mode 100644
index 00000000000..2af454332dd
--- /dev/null
+++ b/src/third_party/unwind/dist/src/dwarf/Gexpr.c
@@ -0,0 +1,702 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2003, 2005 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "dwarf_i.h"
+#include "libunwind_i.h"
+
+/* The "pick" operator provides an index range of 0..255 indicating
+   that the stack could at least have a depth of up to 256 elements,
+   but the GCC unwinder restricts the depth to 64, which seems
+   reasonable so we use the same value here.  */
+#define MAX_EXPR_STACK_SIZE     64
+
+#define NUM_OPERANDS(signature) (((signature) >> 6) & 0x3)
+#define OPND1_TYPE(signature)   (((signature) >> 3) & 0x7)
+#define OPND2_TYPE(signature)   (((signature) >> 0) & 0x7)
+
+#define OPND_SIGNATURE(n, t1, t2) (((n) << 6) | ((t1) << 3) | ((t2) << 0))
+#define OPND1(t1)               OPND_SIGNATURE(1, t1, 0)
+#define OPND2(t1, t2)           OPND_SIGNATURE(2, t1, t2)
+
+#define VAL8    0x0
+#define VAL16   0x1
+#define VAL32   0x2
+#define VAL64   0x3
+#define ULEB128 0x4
+#define SLEB128 0x5
+#define OFFSET  0x6     /* 32-bit offset for 32-bit DWARF, 64-bit otherwise */
+#define ADDR    0x7     /* Machine address.  */
+
+static const uint8_t operands[256] =
+  {
+    [DW_OP_addr] =              OPND1 (ADDR),
+    [DW_OP_const1u] =           OPND1 (VAL8),
+    [DW_OP_const1s] =           OPND1 (VAL8),
+    [DW_OP_const2u] =           OPND1 (VAL16),
+    [DW_OP_const2s] =           OPND1 (VAL16),
+    [DW_OP_const4u] =           OPND1 (VAL32),
+    [DW_OP_const4s] =           OPND1 (VAL32),
+    [DW_OP_const8u] =           OPND1 (VAL64),
+    [DW_OP_const8s] =           OPND1 (VAL64),
+    [DW_OP_constu]  =           OPND1 (ULEB128),
+    [DW_OP_consts]  =           OPND1 (SLEB128),
+    [DW_OP_pick] =              OPND1 (VAL8),
+    [DW_OP_plus_uconst] =       OPND1 (ULEB128),
+    [DW_OP_skip] =              OPND1 (VAL16),
+    [DW_OP_bra] =               OPND1 (VAL16),
+    [DW_OP_breg0 +  0] =        OPND1 (SLEB128),
+    [DW_OP_breg0 +  1] =        OPND1 (SLEB128),
+    [DW_OP_breg0 +  2] =        OPND1 (SLEB128),
+    [DW_OP_breg0 +  3] =        OPND1 (SLEB128),
+    [DW_OP_breg0 +  4] =        OPND1 (SLEB128),
+    [DW_OP_breg0 +  5] =        OPND1 (SLEB128),
+    [DW_OP_breg0 +  6] =        OPND1 (SLEB128),
+    [DW_OP_breg0 +  7] =        OPND1 (SLEB128),
+    [DW_OP_breg0 +  8] =        OPND1 (SLEB128),
+    [DW_OP_breg0 +  9] =        OPND1 (SLEB128),
+    [DW_OP_breg0 + 10] =        OPND1 (SLEB128),
+    [DW_OP_breg0 + 11] =        OPND1 (SLEB128),
+    [DW_OP_breg0 + 12] =        OPND1 (SLEB128),
+    [DW_OP_breg0 + 13] =        OPND1 (SLEB128),
+    [DW_OP_breg0 + 14] =        OPND1 (SLEB128),
+    [DW_OP_breg0 + 15] =        OPND1 (SLEB128),
+    [DW_OP_breg0 + 16] =        OPND1 (SLEB128),
+    [DW_OP_breg0 + 17] =        OPND1 (SLEB128),
+    [DW_OP_breg0 + 18] =        OPND1 (SLEB128),
+    [DW_OP_breg0 + 19] =        OPND1 (SLEB128),
+    [DW_OP_breg0 + 20] =        OPND1 (SLEB128),
+    [DW_OP_breg0 + 21] =        OPND1 (SLEB128),
+    [DW_OP_breg0 + 22] =        OPND1 (SLEB128),
+    [DW_OP_breg0 + 23] =        OPND1 (SLEB128),
+    [DW_OP_breg0 + 24] =        OPND1 (SLEB128),
+    [DW_OP_breg0 + 25] =        OPND1 (SLEB128),
+    [DW_OP_breg0 + 26] =        OPND1 (SLEB128),
+    [DW_OP_breg0 + 27] =        OPND1 (SLEB128),
+    [DW_OP_breg0 + 28] =        OPND1 (SLEB128),
+    [DW_OP_breg0 + 29] =        OPND1 (SLEB128),
+    [DW_OP_breg0 + 30] =        OPND1 (SLEB128),
+    [DW_OP_breg0 + 31] =        OPND1 (SLEB128),
+    [DW_OP_regx] =              OPND1 (ULEB128),
+    [DW_OP_fbreg] =             OPND1 (SLEB128),
+    [DW_OP_bregx] =             OPND2 (ULEB128, SLEB128),
+    [DW_OP_piece] =             OPND1 (ULEB128),
+    [DW_OP_deref_size] =        OPND1 (VAL8),
+    [DW_OP_xderef_size] =       OPND1 (VAL8),
+    [DW_OP_call2] =             OPND1 (VAL16),
+    [DW_OP_call4] =             OPND1 (VAL32),
+    [DW_OP_call_ref] =          OPND1 (OFFSET)
+  };
+
+static inline unw_sword_t
+sword (unw_addr_space_t as, unw_word_t val)
+{
+  switch (dwarf_addr_size (as))
+    {
+    case 1: return (int8_t) val;
+    case 2: return (int16_t) val;
+    case 4: return (int32_t) val;
+    case 8: return (int64_t) val;
+    default: abort ();
+    }
+}
+
+static inline unw_word_t
+read_operand (unw_addr_space_t as, unw_accessors_t *a,
+              unw_word_t *addr, int operand_type, unw_word_t *val, void *arg)
+{
+  uint8_t u8;
+  uint16_t u16;
+  uint32_t u32;
+  uint64_t u64;
+  int ret;
+
+  if (operand_type == ADDR)
+    switch (dwarf_addr_size (as))
+      {
+      case 1: operand_type = VAL8; break;
+      case 2: operand_type = VAL16; break;
+      case 4: operand_type = VAL32; break;
+      case 8: operand_type = VAL64; break;
+      default: abort ();
+      }
+
+  switch (operand_type)
+    {
+    case VAL8:
+      ret = dwarf_readu8 (as, a, addr, &u8, arg);
+      if (ret < 0)
+        return ret;
+      *val = u8;
+      break;
+
+    case VAL16:
+      ret = dwarf_readu16 (as, a, addr, &u16, arg);
+      if (ret < 0)
+        return ret;
+      *val = u16;
+      break;
+
+    case VAL32:
+      ret = dwarf_readu32 (as, a, addr, &u32, arg);
+      if (ret < 0)
+        return ret;
+      *val = u32;
+      break;
+
+    case VAL64:
+      ret = dwarf_readu64 (as, a, addr, &u64, arg);
+      if (ret < 0)
+        return ret;
+      *val = u64;
+      break;
+
+    case ULEB128:
+      ret = dwarf_read_uleb128 (as, a, addr, val, arg);
+      break;
+
+    case SLEB128:
+      ret = dwarf_read_sleb128 (as, a, addr, val, arg);
+      break;
+
+    case OFFSET: /* only used by DW_OP_call_ref, which we don't implement */
+    default:
+      Debug (1, "Unexpected operand type %d\n", operand_type);
+      ret = -UNW_EINVAL;
+    }
+  return ret;
+}
+
+HIDDEN int
+dwarf_stack_aligned(struct dwarf_cursor *c, unw_word_t cfa_addr,
+                    unw_word_t rbp_addr, unw_word_t *cfa_offset) {
+  unw_accessors_t *a;
+  int ret;
+  void *arg;
+  unw_word_t len;
+  uint8_t opcode;
+  unw_word_t operand1;
+
+  a = unw_get_accessors_int (c->as);
+  arg = c->as_arg;
+
+  ret = dwarf_read_uleb128(c->as, a, &rbp_addr, &len, arg);
+  if (len != 2 || ret < 0)
+    return 0;
+
+  ret = dwarf_readu8(c->as, a, &rbp_addr, &opcode, arg);
+  if (ret < 0 || opcode != DW_OP_breg6)
+    return 0;
+
+  ret = read_operand(c->as, a, &rbp_addr,
+                     OPND1_TYPE(operands[opcode]), &operand1, arg);
+
+  if (ret < 0 || operand1 != 0)
+    return 0;
+
+  ret = dwarf_read_uleb128(c->as, a, &cfa_addr, &len, arg);
+  if (ret < 0 || len != 3)
+    return 0;
+
+  ret = dwarf_readu8(c->as, a, &cfa_addr, &opcode, arg);
+  if (ret < 0 || opcode != DW_OP_breg6)
+    return 0;
+
+  ret = read_operand(c->as, a, &cfa_addr,
+                     OPND1_TYPE(operands[opcode]), &operand1, arg);
+  if (ret < 0)
+    return 0;
+
+  ret = dwarf_readu8(c->as, a, &cfa_addr, &opcode, arg);
+  if (ret < 0 || opcode != DW_OP_deref)
+    return 0;
+
+  *cfa_offset = operand1;
+  return 1;
+}
+
+HIDDEN int
+dwarf_eval_expr (struct dwarf_cursor *c, unw_word_t stack_val, unw_word_t *addr,
+                 unw_word_t len, unw_word_t *valp, int *is_register)
+{
+  unw_word_t operand1 = 0, operand2 = 0, tmp1, tmp2 = 0, tmp3, end_addr;
+  uint8_t opcode, operands_signature, u8;
+  unw_addr_space_t as;
+  unw_accessors_t *a;
+  void *arg;
+  unw_word_t stack[MAX_EXPR_STACK_SIZE];
+  unsigned int tos = 0;
+  uint16_t u16;
+  uint32_t u32;
+  uint64_t u64;
+  int ret;
+# define pop()                                  \
+({                                              \
+  if ((tos - 1) >= MAX_EXPR_STACK_SIZE)         \
+    {                                           \
+      Debug (1, "Stack underflow\n");           \
+      return -UNW_EINVAL;                       \
+    }                                           \
+  stack[--tos];                                 \
+})
+# define push(x)                                \
+do {                                            \
+  unw_word_t _x = (x);                          \
+  if (tos >= MAX_EXPR_STACK_SIZE)               \
+    {                                           \
+      Debug (1, "Stack overflow\n");            \
+      return -UNW_EINVAL;                       \
+    }                                           \
+  stack[tos++] = _x;                            \
+} while (0)
+# define pick(n)                                \
+({                                              \
+  unsigned int _index = tos - 1 - (n);          \
+  if (_index >= MAX_EXPR_STACK_SIZE)            \
+    {                                           \
+      Debug (1, "Out-of-stack pick\n");         \
+      return -UNW_EINVAL;                       \
+    }                                           \
+  stack[_index];                                \
+})
+
+  as = c->as;
+  arg = c->as_arg;
+  a = unw_get_accessors_int (as);
+  end_addr = *addr + len;
+  *is_register = 0;
+
+  Debug (14, "len=%lu, pushing initial value=0x%lx\n",
+         (unsigned long) len, (unsigned long) stack_val);
+
+  /* The DWARF standard requires the current CFA to be pushed onto the stack */
+  /* before evaluating DW_CFA_expression and DW_CFA_val_expression programs. */
+  /* DW_CFA_def_cfa_expressions do not take an initial value, but we push on */
+  /* a dummy value to keep this logic consistent. */
+  push (stack_val);
+
+  while (*addr < end_addr)
+    {
+      if ((ret = dwarf_readu8 (as, a, addr, &opcode, arg)) < 0)
+        return ret;
+
+      operands_signature = operands[opcode];
+
+      if (unlikely (NUM_OPERANDS (operands_signature) > 0))
+        {
+          if ((ret = read_operand (as, a, addr,
+                                   OPND1_TYPE (operands_signature),
+                                   &operand1, arg)) < 0)
+            return ret;
+          if (NUM_OPERANDS (operands_signature) > 1)
+            if ((ret = read_operand (as, a, addr,
+                                     OPND2_TYPE (operands_signature),
+                                     &operand2, arg)) < 0)
+              return ret;
+        }
+
+      switch ((dwarf_expr_op_t) opcode)
+        {
+        case DW_OP_lit0:  case DW_OP_lit1:  case DW_OP_lit2:
+        case DW_OP_lit3:  case DW_OP_lit4:  case DW_OP_lit5:
+        case DW_OP_lit6:  case DW_OP_lit7:  case DW_OP_lit8:
+        case DW_OP_lit9:  case DW_OP_lit10: case DW_OP_lit11:
+        case DW_OP_lit12: case DW_OP_lit13: case DW_OP_lit14:
+        case DW_OP_lit15: case DW_OP_lit16: case DW_OP_lit17:
+        case DW_OP_lit18: case DW_OP_lit19: case DW_OP_lit20:
+        case DW_OP_lit21: case DW_OP_lit22: case DW_OP_lit23:
+        case DW_OP_lit24: case DW_OP_lit25: case DW_OP_lit26:
+        case DW_OP_lit27: case DW_OP_lit28: case DW_OP_lit29:
+        case DW_OP_lit30: case DW_OP_lit31:
+          Debug (15, "OP_lit(%d)\n", (int) opcode - DW_OP_lit0);
+          push (opcode - DW_OP_lit0);
+          break;
+
+        case DW_OP_breg0:  case DW_OP_breg1:  case DW_OP_breg2:
+        case DW_OP_breg3:  case DW_OP_breg4:  case DW_OP_breg5:
+        case DW_OP_breg6:  case DW_OP_breg7:  case DW_OP_breg8:
+        case DW_OP_breg9:  case DW_OP_breg10: case DW_OP_breg11:
+        case DW_OP_breg12: case DW_OP_breg13: case DW_OP_breg14:
+        case DW_OP_breg15: case DW_OP_breg16: case DW_OP_breg17:
+        case DW_OP_breg18: case DW_OP_breg19: case DW_OP_breg20:
+        case DW_OP_breg21: case DW_OP_breg22: case DW_OP_breg23:
+        case DW_OP_breg24: case DW_OP_breg25: case DW_OP_breg26:
+        case DW_OP_breg27: case DW_OP_breg28: case DW_OP_breg29:
+        case DW_OP_breg30: case DW_OP_breg31:
+          Debug (15, "OP_breg(r%d,0x%lx)\n",
+                 (int) opcode - DW_OP_breg0, (unsigned long) operand1);
+          if ((ret = unw_get_reg (dwarf_to_cursor (c),
+                                  dwarf_to_unw_regnum (opcode - DW_OP_breg0),
+                                  &tmp1)) < 0)
+            return ret;
+          push (tmp1 + operand1);
+          break;
+
+        case DW_OP_bregx:
+          Debug (15, "OP_bregx(r%d,0x%lx)\n",
+                 (int) operand1, (unsigned long) operand2);
+          if ((ret = unw_get_reg (dwarf_to_cursor (c),
+                                  dwarf_to_unw_regnum (operand1), &tmp1)) < 0)
+            return ret;
+          push (tmp1 + operand2);
+          break;
+
+        case DW_OP_reg0:  case DW_OP_reg1:  case DW_OP_reg2:
+        case DW_OP_reg3:  case DW_OP_reg4:  case DW_OP_reg5:
+        case DW_OP_reg6:  case DW_OP_reg7:  case DW_OP_reg8:
+        case DW_OP_reg9:  case DW_OP_reg10: case DW_OP_reg11:
+        case DW_OP_reg12: case DW_OP_reg13: case DW_OP_reg14:
+        case DW_OP_reg15: case DW_OP_reg16: case DW_OP_reg17:
+        case DW_OP_reg18: case DW_OP_reg19: case DW_OP_reg20:
+        case DW_OP_reg21: case DW_OP_reg22: case DW_OP_reg23:
+        case DW_OP_reg24: case DW_OP_reg25: case DW_OP_reg26:
+        case DW_OP_reg27: case DW_OP_reg28: case DW_OP_reg29:
+        case DW_OP_reg30: case DW_OP_reg31:
+          Debug (15, "OP_reg(r%d)\n", (int) opcode - DW_OP_reg0);
+          *valp = dwarf_to_unw_regnum (opcode - DW_OP_reg0);
+          *is_register = 1;
+          return 0;
+
+        case DW_OP_regx:
+          Debug (15, "OP_regx(r%d)\n", (int) operand1);
+          *valp = dwarf_to_unw_regnum (operand1);
+          *is_register = 1;
+          return 0;
+
+        case DW_OP_addr:
+        case DW_OP_const1u:
+        case DW_OP_const2u:
+        case DW_OP_const4u:
+        case DW_OP_const8u:
+        case DW_OP_constu:
+        case DW_OP_const8s:
+        case DW_OP_consts:
+          Debug (15, "OP_const(0x%lx)\n", (unsigned long) operand1);
+          push (operand1);
+          break;
+
+        case DW_OP_const1s:
+          if (operand1 & 0x80)
+            operand1 |= ((unw_word_t) -1) << 8;
+          Debug (15, "OP_const1s(%ld)\n", (long) operand1);
+          push (operand1);
+          break;
+
+        case DW_OP_const2s:
+          if (operand1 & 0x8000)
+            operand1 |= ((unw_word_t) -1) << 16;
+          Debug (15, "OP_const2s(%ld)\n", (long) operand1);
+          push (operand1);
+          break;
+
+        case DW_OP_const4s:
+          if (operand1 & 0x80000000)
+            operand1 |= (((unw_word_t) -1) << 16) << 16;
+          Debug (15, "OP_const4s(%ld)\n", (long) operand1);
+          push (operand1);
+          break;
+
+        case DW_OP_deref:
+          Debug (15, "OP_deref\n");
+          tmp1 = pop ();
+          if ((ret = dwarf_readw (as, a, &tmp1, &tmp2, arg)) < 0)
+            return ret;
+          push (tmp2);
+          break;
+
+        case DW_OP_deref_size:
+          Debug (15, "OP_deref_size(%d)\n", (int) operand1);
+          tmp1 = pop ();
+          switch (operand1)
+            {
+            default:
+              Debug (1, "Unexpected DW_OP_deref_size size %d\n",
+                     (int) operand1);
+              return -UNW_EINVAL;
+
+            case 1:
+              if ((ret = dwarf_readu8 (as, a, &tmp1, &u8, arg)) < 0)
+                return ret;
+              tmp2 = u8;
+              break;
+
+            case 2:
+              if ((ret = dwarf_readu16 (as, a, &tmp1, &u16, arg)) < 0)
+                return ret;
+              tmp2 = u16;
+              break;
+
+            case 3:
+            case 4:
+              if ((ret = dwarf_readu32 (as, a, &tmp1, &u32, arg)) < 0)
+                return ret;
+              tmp2 = u32;
+              if (operand1 == 3)
+                {
+                  if (dwarf_is_big_endian (as))
+                    tmp2 >>= 8;
+                  else
+                    tmp2 &= 0xffffff;
+                }
+              break;
+            case 5:
+            case 6:
+            case 7:
+            case 8:
+              if ((ret = dwarf_readu64 (as, a, &tmp1, &u64, arg)) < 0)
+                return ret;
+              tmp2 = u64;
+              if (operand1 != 8)
+                {
+                  if (dwarf_is_big_endian (as))
+                    tmp2 >>= 64 - 8 * operand1;
+                  else
+                    tmp2 &= (~ (unw_word_t) 0) << (8 * operand1);
+                }
+              break;
+            }
+          push (tmp2);
+          break;
+
+        case DW_OP_dup:
+          Debug (15, "OP_dup\n");
+          push (pick (0));
+          break;
+
+        case DW_OP_drop:
+          Debug (15, "OP_drop\n");
+          (void) pop ();
+          break;
+
+        case DW_OP_pick:
+          Debug (15, "OP_pick(%d)\n", (int) operand1);
+          push (pick (operand1));
+          break;
+
+        case DW_OP_over:
+          Debug (15, "OP_over\n");
+          push (pick (1));
+          break;
+
+        case DW_OP_swap:
+          Debug (15, "OP_swap\n");
+          tmp1 = pop ();
+          tmp2 = pop ();
+          push (tmp1);
+          push (tmp2);
+          break;
+
+        case DW_OP_rot:
+          Debug (15, "OP_rot\n");
+          tmp1 = pop ();
+          tmp2 = pop ();
+          tmp3 = pop ();
+          push (tmp1);
+          push (tmp3);
+          push (tmp2);
+          break;
+
+        case DW_OP_abs:
+          Debug (15, "OP_abs\n");
+          tmp1 = pop ();
+          if (tmp1 & ((unw_word_t) 1 << (8 * dwarf_addr_size (as) - 1)))
+            tmp1 = -tmp1;
+          push (tmp1);
+          break;
+
+        case DW_OP_and:
+          Debug (15, "OP_and\n");
+          tmp1 = pop ();
+          tmp2 = pop ();
+          push (tmp1 & tmp2);
+          break;
+
+        case DW_OP_div:
+          Debug (15, "OP_div\n");
+          tmp1 = pop ();
+          tmp2 = pop ();
+          if (tmp1)
+            tmp1 = sword (as, tmp2) / sword (as, tmp1);
+          push (tmp1);
+          break;
+
+        case DW_OP_minus:
+          Debug (15, "OP_minus\n");
+          tmp1 = pop ();
+          tmp2 = pop ();
+          tmp1 = tmp2 - tmp1;
+          push (tmp1);
+          break;
+
+        case DW_OP_mod:
+          Debug (15, "OP_mod\n");
+          tmp1 = pop ();
+          tmp2 = pop ();
+          if (tmp1)
+            tmp1 = tmp2 % tmp1;
+          push (tmp1);
+          break;
+
+        case DW_OP_mul:
+          Debug (15, "OP_mul\n");
+          tmp1 = pop ();
+          tmp2 = pop ();
+          if (tmp1)
+            tmp1 = tmp2 * tmp1;
+          push (tmp1);
+          break;
+
+        case DW_OP_neg:
+          Debug (15, "OP_neg\n");
+          push (-pop ());
+          break;
+
+        case DW_OP_not:
+          Debug (15, "OP_not\n");
+          push (~pop ());
+          break;
+
+        case DW_OP_or:
+          Debug (15, "OP_or\n");
+          tmp1 = pop ();
+          tmp2 = pop ();
+          push (tmp1 | tmp2);
+          break;
+
+        case DW_OP_plus:
+          Debug (15, "OP_plus\n");
+          tmp1 = pop ();
+          tmp2 = pop ();
+          push (tmp1 + tmp2);
+          break;
+
+        case DW_OP_plus_uconst:
+          Debug (15, "OP_plus_uconst(%lu)\n", (unsigned long) operand1);
+          tmp1 = pop ();
+          push (tmp1 + operand1);
+          break;
+
+        case DW_OP_shl:
+          Debug (15, "OP_shl\n");
+          tmp1 = pop ();
+          tmp2 = pop ();
+          push (tmp2 << tmp1);
+          break;
+
+        case DW_OP_shr:
+          Debug (15, "OP_shr\n");
+          tmp1 = pop ();
+          tmp2 = pop ();
+          push (tmp2 >> tmp1);
+          break;
+
+        case DW_OP_shra:
+          Debug (15, "OP_shra\n");
+          tmp1 = pop ();
+          tmp2 = pop ();
+          push (sword (as, tmp2) >> tmp1);
+          break;
+
+        case DW_OP_xor:
+          Debug (15, "OP_xor\n");
+          tmp1 = pop ();
+          tmp2 = pop ();
+          push (tmp1 ^ tmp2);
+          break;
+
+        case DW_OP_le:
+          Debug (15, "OP_le\n");
+          tmp1 = pop ();
+          tmp2 = pop ();
+          push (sword (as, tmp2) <= sword (as, tmp1));
+          break;
+
+        case DW_OP_ge:
+          Debug (15, "OP_ge\n");
+          tmp1 = pop ();
+          tmp2 = pop ();
+          push (sword (as, tmp2) >= sword (as, tmp1));
+          break;
+
+        case DW_OP_eq:
+          Debug (15, "OP_eq\n");
+          tmp1 = pop ();
+          tmp2 = pop ();
+          push (sword (as, tmp2) == sword (as, tmp1));
+          break;
+
+        case DW_OP_lt:
+          Debug (15, "OP_lt\n");
+          tmp1 = pop ();
+          tmp2 = pop ();
+          push (sword (as, tmp2) < sword (as, tmp1));
+          break;
+
+        case DW_OP_gt:
+          Debug (15, "OP_gt\n");
+          tmp1 = pop ();
+          tmp2 = pop ();
+          push (sword (as, tmp2) > sword (as, tmp1));
+          break;
+
+        case DW_OP_ne:
+          Debug (15, "OP_ne\n");
+          tmp1 = pop ();
+          tmp2 = pop ();
+          push (sword (as, tmp2) != sword (as, tmp1));
+          break;
+
+        case DW_OP_skip:
+          Debug (15, "OP_skip(%d)\n", (int16_t) operand1);
+          *addr += (int16_t) operand1;
+          break;
+
+        case DW_OP_bra:
+          Debug (15, "OP_skip(%d)\n", (int16_t) operand1);
+          tmp1 = pop ();
+          if (tmp1)
+            *addr += (int16_t) operand1;
+          break;
+
+        case DW_OP_nop:
+          Debug (15, "OP_nop\n");
+          break;
+
+        case DW_OP_call2:
+        case DW_OP_call4:
+        case DW_OP_call_ref:
+        case DW_OP_fbreg:
+        case DW_OP_piece:
+        case DW_OP_push_object_address:
+        case DW_OP_xderef:
+        case DW_OP_xderef_size:
+        default:
+          Debug (1, "Unexpected opcode 0x%x\n", opcode);
+          return -UNW_EINVAL;
+        }
+    }
+  *valp = pop ();
+  Debug (14, "final value = 0x%lx\n", (unsigned long) *valp);
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/dwarf/Gfde.c b/src/third_party/unwind/dist/src/dwarf/Gfde.c
new file mode 100644
index 00000000000..9250b895eab
--- /dev/null
+++ b/src/third_party/unwind/dist/src/dwarf/Gfde.c
@@ -0,0 +1,359 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2003-2005 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "dwarf_i.h"
+
+static inline int
+is_cie_id (unw_word_t val, int is_debug_frame)
+{
+  /* The CIE ID is normally 0xffffffff (for 32-bit ELF) or
+     0xffffffffffffffff (for 64-bit ELF).  However, .eh_frame
+     uses 0.  */
+  if (is_debug_frame)
+      return (val == (uint32_t)(-1) || val == (uint64_t)(-1));
+  else
+    return (val == 0);
+}
+
+/* Note: we don't need to keep track of more than the first four
+   characters of the augmentation string, because we (a) ignore any
+   augmentation string contents once we find an unrecognized character
+   and (b) those characters that we do recognize, can't be
+   repeated.  */
+static inline int
+parse_cie (unw_addr_space_t as, unw_accessors_t *a, unw_word_t addr,
+           const unw_proc_info_t *pi, struct dwarf_cie_info *dci,
+           int is_debug_frame, void *arg)
+{
+  uint8_t version, ch, augstr[5], fde_encoding, handler_encoding;
+  unw_word_t len, cie_end_addr, aug_size;
+  uint32_t u32val;
+  uint64_t u64val;
+  size_t i;
+  int ret;
+# define STR2(x)        #x
+# define STR(x)         STR2(x)
+
+  /* Pick appropriate default for FDE-encoding.  DWARF spec says
+     start-IP (initial_location) and the code-size (address_range) are
+     "address-unit sized constants".  The `R' augmentation can be used
+     to override this, but by default, we pick an address-sized unit
+     for fde_encoding.  */
+  switch (dwarf_addr_size (as))
+    {
+    case 4:     fde_encoding = DW_EH_PE_udata4; break;
+    case 8:     fde_encoding = DW_EH_PE_udata8; break;
+    default:    fde_encoding = DW_EH_PE_omit; break;
+    }
+
+  dci->lsda_encoding = DW_EH_PE_omit;
+  dci->handler = 0;
+
+  if ((ret = dwarf_readu32 (as, a, &addr, &u32val, arg)) < 0)
+    return ret;
+
+  if (u32val != 0xffffffff)
+    {
+      /* the CIE is in the 32-bit DWARF format */
+      uint32_t cie_id;
+      /* DWARF says CIE id should be 0xffffffff, but in .eh_frame, it's 0 */
+      const uint32_t expected_id = (is_debug_frame) ? 0xffffffff : 0;
+
+      len = u32val;
+      cie_end_addr = addr + len;
+      if ((ret = dwarf_readu32 (as, a, &addr, &cie_id, arg)) < 0)
+        return ret;
+      if (cie_id != expected_id)
+        {
+          Debug (1, "Unexpected CIE id %x\n", cie_id);
+          return -UNW_EINVAL;
+        }
+    }
+  else
+    {
+      /* the CIE is in the 64-bit DWARF format */
+      uint64_t cie_id;
+      /* DWARF says CIE id should be 0xffffffffffffffff, but in
+         .eh_frame, it's 0 */
+      const uint64_t expected_id = (is_debug_frame) ? 0xffffffffffffffffull : 0;
+
+      if ((ret = dwarf_readu64 (as, a, &addr, &u64val, arg)) < 0)
+        return ret;
+      len = u64val;
+      cie_end_addr = addr + len;
+      if ((ret = dwarf_readu64 (as, a, &addr, &cie_id, arg)) < 0)
+        return ret;
+      if (cie_id != expected_id)
+        {
+          Debug (1, "Unexpected CIE id %llx\n", (long long) cie_id);
+          return -UNW_EINVAL;
+        }
+    }
+  dci->cie_instr_end = cie_end_addr;
+
+  if ((ret = dwarf_readu8 (as, a, &addr, &version, arg)) < 0)
+    return ret;
+
+  /* GCC emits version 1??? */
+  if (version != 1 && (version < DWARF_CIE_VERSION || version > DWARF_CIE_VERSION_MAX))
+    {
+      Debug (1, "Got CIE version %u, expected version 1 or between "
+             STR (DWARF_CIE_VERSION) " and " STR (DWARF_CIE_VERSION_MAX) "\n", version);
+      return -UNW_EBADVERSION;
+    }
+
+  /* read and parse the augmentation string: */
+  memset (augstr, 0, sizeof (augstr));
+  for (i = 0;;)
+    {
+      if ((ret = dwarf_readu8 (as, a, &addr, &ch, arg)) < 0)
+        return ret;
+
+      if (!ch)
+        break;  /* end of augmentation string */
+
+      if (i < sizeof (augstr) - 1)
+        augstr[i++] = ch;
+    }
+
+  if ((ret = dwarf_read_uleb128 (as, a, &addr, &dci->code_align, arg)) < 0
+      || (ret = dwarf_read_sleb128 (as, a, &addr, &dci->data_align, arg)) < 0)
+    return ret;
+
+  /* Read the return-address column either as a u8 or as a uleb128.  */
+  if (version == 1)
+    {
+      if ((ret = dwarf_readu8 (as, a, &addr, &ch, arg)) < 0)
+        return ret;
+      dci->ret_addr_column = ch;
+    }
+  else if ((ret = dwarf_read_uleb128 (as, a, &addr, &dci->ret_addr_column,
+                                      arg)) < 0)
+    return ret;
+
+  i = 0;
+  if (augstr[0] == 'z')
+    {
+      dci->sized_augmentation = 1;
+      if ((ret = dwarf_read_uleb128 (as, a, &addr, &aug_size, arg)) < 0)
+        return ret;
+      i++;
+    }
+
+  for (; i < sizeof (augstr) && augstr[i]; ++i)
+    switch (augstr[i])
+      {
+      case 'L':
+        /* read the LSDA pointer-encoding format.  */
+        if ((ret = dwarf_readu8 (as, a, &addr, &ch, arg)) < 0)
+          return ret;
+        dci->lsda_encoding = ch;
+        break;
+
+      case 'R':
+        /* read the FDE pointer-encoding format.  */
+        if ((ret = dwarf_readu8 (as, a, &addr, &fde_encoding, arg)) < 0)
+          return ret;
+        break;
+
+      case 'P':
+        /* read the personality-routine pointer-encoding format.  */
+        if ((ret = dwarf_readu8 (as, a, &addr, &handler_encoding, arg)) < 0)
+          return ret;
+        if ((ret = dwarf_read_encoded_pointer (as, a, &addr, handler_encoding,
+                                               pi, &dci->handler, arg)) < 0)
+          return ret;
+        break;
+
+      case 'S':
+        /* This is a signal frame. */
+        dci->signal_frame = 1;
+
+        /* Temporarily set it to one so dwarf_parse_fde() knows that
+           it should fetch the actual ABI/TAG pair from the FDE.  */
+        dci->have_abi_marker = 1;
+        break;
+
+      default:
+        Debug (1, "Unexpected augmentation string `%s'\n", augstr);
+        if (dci->sized_augmentation)
+          /* If we have the size of the augmentation body, we can skip
+             over the parts that we don't understand, so we're OK. */
+          goto done;
+        else
+          return -UNW_EINVAL;
+      }
+ done:
+  dci->fde_encoding = fde_encoding;
+  dci->cie_instr_start = addr;
+  Debug (15, "CIE parsed OK, augmentation = \"%s\", handler=0x%lx\n",
+         augstr, (long) dci->handler);
+  return 0;
+}
+
+/* Extract proc-info from the FDE starting at adress ADDR.
+   
+   Pass BASE as zero for eh_frame behaviour, or a pointer to
+   debug_frame base for debug_frame behaviour.  */
+
+HIDDEN int
+dwarf_extract_proc_info_from_fde (unw_addr_space_t as, unw_accessors_t *a,
+                                  unw_word_t *addrp, unw_proc_info_t *pi,
+                                  unw_word_t base,
+                                  int need_unwind_info, int is_debug_frame,
+                                  void *arg)
+{
+  unw_word_t fde_end_addr, cie_addr, cie_offset_addr, aug_end_addr = 0;
+  unw_word_t start_ip, ip_range, aug_size, addr = *addrp;
+  int ret, ip_range_encoding;
+  struct dwarf_cie_info dci;
+  uint64_t u64val;
+  uint32_t u32val;
+
+  Debug (12, "FDE @ 0x%lx\n", (long) addr);
+
+  memset (&dci, 0, sizeof (dci));
+
+  if ((ret = dwarf_readu32 (as, a, &addr, &u32val, arg)) < 0)
+    return ret;
+
+  if (u32val != 0xffffffff)
+    {
+      int32_t cie_offset = 0;
+
+      /* In some configurations, an FDE with a 0 length indicates the
+         end of the FDE-table.  */
+      if (u32val == 0)
+        return -UNW_ENOINFO;
+
+      /* the FDE is in the 32-bit DWARF format */
+
+      *addrp = fde_end_addr = addr + u32val;
+      cie_offset_addr = addr;
+
+      if ((ret = dwarf_reads32 (as, a, &addr, &cie_offset, arg)) < 0)
+        return ret;
+
+      if (is_cie_id (cie_offset, is_debug_frame))
+        /* ignore CIEs (happens during linear searches) */
+        return 0;
+
+      if (is_debug_frame)
+        cie_addr = base + cie_offset;
+      else
+        /* DWARF says that the CIE_pointer in the FDE is a
+           .debug_frame-relative offset, but the GCC-generated .eh_frame
+           sections instead store a "pcrelative" offset, which is just
+           as fine as it's self-contained.  */
+        cie_addr = cie_offset_addr - cie_offset;
+    }
+  else
+    {
+      int64_t cie_offset = 0;
+
+      /* the FDE is in the 64-bit DWARF format */
+
+      if ((ret = dwarf_readu64 (as, a, &addr, &u64val, arg)) < 0)
+        return ret;
+
+      *addrp = fde_end_addr = addr + u64val;
+      cie_offset_addr = addr;
+
+      if ((ret = dwarf_reads64 (as, a, &addr, &cie_offset, arg)) < 0)
+        return ret;
+
+      if (is_cie_id (cie_offset, is_debug_frame))
+        /* ignore CIEs (happens during linear searches) */
+        return 0;
+
+      if (is_debug_frame)
+        cie_addr = base + cie_offset;
+      else
+        /* DWARF says that the CIE_pointer in the FDE is a
+           .debug_frame-relative offset, but the GCC-generated .eh_frame
+           sections instead store a "pcrelative" offset, which is just
+           as fine as it's self-contained.  */
+        cie_addr = (unw_word_t) ((uint64_t) cie_offset_addr - cie_offset);
+    }
+
+  Debug (15, "looking for CIE at address %lx\n", (long) cie_addr);
+
+  if ((ret = parse_cie (as, a, cie_addr, pi, &dci, is_debug_frame, arg)) < 0)
+    return ret;
+
+  /* IP-range has same encoding as FDE pointers, except that it's
+     always an absolute value: */
+  ip_range_encoding = dci.fde_encoding & DW_EH_PE_FORMAT_MASK;
+
+  if ((ret = dwarf_read_encoded_pointer (as, a, &addr, dci.fde_encoding,
+                                         pi, &start_ip, arg)) < 0
+      || (ret = dwarf_read_encoded_pointer (as, a, &addr, ip_range_encoding,
+                                            pi, &ip_range, arg)) < 0)
+    return ret;
+  pi->start_ip = start_ip;
+  pi->end_ip = start_ip + ip_range;
+  pi->handler = dci.handler;
+
+  if (dci.sized_augmentation)
+    {
+      if ((ret = dwarf_read_uleb128 (as, a, &addr, &aug_size, arg)) < 0)
+        return ret;
+      aug_end_addr = addr + aug_size;
+    }
+
+  if ((ret = dwarf_read_encoded_pointer (as, a, &addr, dci.lsda_encoding,
+                                         pi, &pi->lsda, arg)) < 0)
+    return ret;
+
+  Debug (15, "FDE covers IP 0x%lx-0x%lx, LSDA=0x%lx\n",
+         (long) pi->start_ip, (long) pi->end_ip, (long) pi->lsda);
+
+  if (need_unwind_info)
+    {
+      pi->format = UNW_INFO_FORMAT_TABLE;
+      pi->unwind_info_size = sizeof (dci);
+      pi->unwind_info = mempool_alloc (&dwarf_cie_info_pool);
+      if (!pi->unwind_info)
+        return -UNW_ENOMEM;
+
+      if (dci.have_abi_marker)
+        {
+          if ((ret = dwarf_readu16 (as, a, &addr, &dci.abi, arg)) < 0
+              || (ret = dwarf_readu16 (as, a, &addr, &dci.tag, arg)) < 0)
+            return ret;
+          Debug (13, "Found ABI marker = (abi=%u, tag=%u)\n",
+                 dci.abi, dci.tag);
+        }
+
+      if (dci.sized_augmentation)
+        dci.fde_instr_start = aug_end_addr;
+      else
+        dci.fde_instr_start = addr;
+      dci.fde_instr_end = fde_end_addr;
+
+      memcpy (pi->unwind_info, &dci, sizeof (dci));
+    }
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/dwarf/Gfind_proc_info-lsb.c b/src/third_party/unwind/dist/src/dwarf/Gfind_proc_info-lsb.c
new file mode 100644
index 00000000000..275419d9c26
--- /dev/null
+++ b/src/third_party/unwind/dist/src/dwarf/Gfind_proc_info-lsb.c
@@ -0,0 +1,944 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2003-2005 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* Locate an FDE via the ELF data-structures defined by LSB v1.3
+   (http://www.linuxbase.org/spec/).  */
+
+#include <stddef.h>
+#include <stdio.h>
+#include <limits.h>
+
+#include "dwarf_i.h"
+#include "dwarf-eh.h"
+#include "libunwind_i.h"
+
+struct table_entry
+  {
+    int32_t start_ip_offset;
+    int32_t fde_offset;
+  };
+
+#ifndef UNW_REMOTE_ONLY
+
+#ifdef __linux
+#include "os-linux.h"
+#endif
+
+#ifndef __clang__
+static ALIAS(dwarf_search_unwind_table) int
+dwarf_search_unwind_table_int (unw_addr_space_t as,
+                               unw_word_t ip,
+                               unw_dyn_info_t *di,
+                               unw_proc_info_t *pi,
+                               int need_unwind_info, void *arg);
+#else
+#define dwarf_search_unwind_table_int dwarf_search_unwind_table
+#endif
+
+static int
+linear_search (unw_addr_space_t as, unw_word_t ip,
+               unw_word_t eh_frame_start, unw_word_t eh_frame_end,
+               unw_word_t fde_count,
+               unw_proc_info_t *pi, int need_unwind_info, void *arg)
+{
+  unw_accessors_t *a = unw_get_accessors_int (unw_local_addr_space);
+  unw_word_t i = 0, fde_addr, addr = eh_frame_start;
+  int ret;
+
+  while (i++ < fde_count && addr < eh_frame_end)
+    {
+      fde_addr = addr;
+      if ((ret = dwarf_extract_proc_info_from_fde (as, a, &addr, pi,
+                                                   eh_frame_start,
+                                                   0, 0, arg)) < 0)
+        return ret;
+
+      if (ip >= pi->start_ip && ip < pi->end_ip)
+        {
+          if (!need_unwind_info)
+            return 1;
+          addr = fde_addr;
+          if ((ret = dwarf_extract_proc_info_from_fde (as, a, &addr, pi,
+                                                       eh_frame_start,
+                                                       need_unwind_info, 0,
+                                                       arg))
+              < 0)
+            return ret;
+          return 1;
+        }
+    }
+  return -UNW_ENOINFO;
+}
+#endif /* !UNW_REMOTE_ONLY */
+
+#ifdef CONFIG_DEBUG_FRAME
+/* Load .debug_frame section from FILE.  Allocates and returns space
+   in *BUF, and sets *BUFSIZE to its size.  IS_LOCAL is 1 if using the
+   local process, in which case we can search the system debug file
+   directory; 0 for other address spaces, in which case we do
+   not. Returns 0 on success, 1 on error.  Succeeds even if the file
+   contains no .debug_frame.  */
+/* XXX: Could use mmap; but elf_map_image keeps tons mapped in.  */
+
+static int
+load_debug_frame (const char *file, char **buf, size_t *bufsize, int is_local)
+{
+  struct elf_image ei;
+  Elf_W (Shdr) *shdr;
+  int ret;
+
+  ei.image = NULL;
+
+  ret = elf_w (load_debuglink) (file, &ei, is_local);
+  if (ret != 0)
+    return ret;
+
+  shdr = elf_w (find_section) (&ei, ".debug_frame");
+  if (!shdr ||
+      (shdr->sh_offset + shdr->sh_size > ei.size))
+    {
+      munmap(ei.image, ei.size);
+      return 1;
+    }
+
+  *bufsize = shdr->sh_size;
+  GET_MEMORY(*buf, *bufsize);
+
+  memcpy(*buf, shdr->sh_offset + ei.image, *bufsize);
+
+  Debug (4, "read %zd bytes of .debug_frame from offset %zd\n",
+	 *bufsize, shdr->sh_offset);
+
+  munmap(ei.image, ei.size);
+  return 0;
+}
+
+/* Locate the binary which originated the contents of address ADDR. Return
+   the name of the binary in *name (space is allocated by the caller)
+   Returns 0 if a binary is successfully found, or 1 if an error occurs.  */
+
+static int
+find_binary_for_address (unw_word_t ip, char *name, size_t name_size)
+{
+#if defined(__linux) && (!UNW_REMOTE_ONLY)
+  struct map_iterator mi;
+  int found = 0;
+  int pid = getpid ();
+  unsigned long segbase, mapoff, hi;
+
+  if (maps_init (&mi, pid) != 0)
+    return 1;
+
+  while (maps_next (&mi, &segbase, &hi, &mapoff))
+    if (ip >= segbase && ip < hi)
+      {
+        size_t len = strlen (mi.path);
+
+        if (len + 1 <= name_size)
+          {
+            memcpy (name, mi.path, len + 1);
+            found = 1;
+          }
+        break;
+      }
+  maps_close (&mi);
+  return !found;
+#endif
+
+  return 1;
+}
+
+/* Locate and/or try to load a debug_frame section for address ADDR.  Return
+   pointer to debug frame descriptor, or zero if not found.  */
+
+static struct unw_debug_frame_list *
+locate_debug_info (unw_addr_space_t as, unw_word_t addr, const char *dlname,
+                   unw_word_t start, unw_word_t end)
+{
+  struct unw_debug_frame_list *w, *fdesc = 0;
+  char path[PATH_MAX];
+  char *name = path;
+  int err;
+  char *buf;
+  size_t bufsize;
+
+  /* First, see if we loaded this frame already.  */
+
+  for (w = as->debug_frames; w; w = w->next)
+    {
+      Debug (4, "checking %p: %lx-%lx\n", w, (long)w->start, (long)w->end);
+      if (addr >= w->start && addr < w->end)
+        return w;
+    }
+
+  /* If the object name we receive is blank, there's still a chance of locating
+     the file by parsing /proc/self/maps.  */
+
+  if (strcmp (dlname, "") == 0)
+    {
+      err = find_binary_for_address (addr, name, sizeof(path));
+      if (err)
+        {
+          Debug (15, "tried to locate binary for 0x%" PRIx64 ", but no luck\n",
+                 (uint64_t) addr);
+          return 0;
+        }
+    }
+  else
+    name = (char*) dlname;
+
+  err = load_debug_frame (name, &buf, &bufsize, as == unw_local_addr_space);
+
+  if (!err)
+    {
+      GET_MEMORY(fdesc, sizeof (struct unw_debug_frame_list));
+
+      fdesc->start = start;
+      fdesc->end = end;
+      fdesc->debug_frame = buf;
+      fdesc->debug_frame_size = bufsize;
+      fdesc->index = NULL;
+      fdesc->next = as->debug_frames;
+
+      as->debug_frames = fdesc;
+    }
+
+  return fdesc;
+}
+
+static size_t
+debug_frame_index_make (struct unw_debug_frame_list *fdesc)
+{
+  unw_accessors_t *a = unw_get_accessors_int (unw_local_addr_space);
+  char *buf = fdesc->debug_frame;
+  size_t bufsize = fdesc->debug_frame_size;
+  unw_word_t addr = (unw_word_t) (uintptr_t) buf;
+  size_t count = 0;
+
+  while (addr < (unw_word_t) (uintptr_t) (buf + bufsize))
+    {
+      unw_word_t item_start = addr, item_end = 0;
+      uint32_t u32val = 0;
+      uint64_t cie_id = 0;
+      uint64_t id_for_cie;
+
+      dwarf_readu32 (unw_local_addr_space, a, &addr, &u32val, NULL);
+
+      if (u32val == 0)
+        break;
+
+      if (u32val != 0xffffffff)
+        {
+          uint32_t cie_id32 = 0;
+
+          item_end = addr + u32val;
+          dwarf_readu32 (unw_local_addr_space, a, &addr, &cie_id32, NULL);
+          cie_id = cie_id32;
+          id_for_cie = 0xffffffff;
+        }
+      else
+        {
+          uint64_t u64val = 0;
+
+          /* Extended length.  */
+          dwarf_readu64 (unw_local_addr_space, a, &addr, &u64val, NULL);
+          item_end = addr + u64val;
+
+          dwarf_readu64 (unw_local_addr_space, a, &addr, &cie_id, NULL);
+          id_for_cie = 0xffffffffffffffffull;
+        }
+
+      /*Debug (1, "CIE/FDE id = %.8x\n", (int) cie_id);*/
+
+      if (cie_id == id_for_cie)
+        {
+          ;
+          /*Debug (1, "Found CIE at %.8x.\n", item_start);*/
+        }
+      else
+        {
+          unw_word_t fde_addr = item_start;
+          unw_proc_info_t this_pi;
+          int err;
+
+          /*Debug (1, "Found FDE at %.8x\n", item_start);*/
+
+          err = dwarf_extract_proc_info_from_fde (unw_local_addr_space,
+                                                  a, &fde_addr,
+                                                  &this_pi,
+                                                  (uintptr_t) buf, 0, 1,
+                                                  NULL);
+
+          if (!err)
+            {
+              Debug (15, "start_ip = %lx, end_ip = %lx\n",
+                     (long) this_pi.start_ip, (long) this_pi.end_ip);
+
+              if (fdesc->index)
+                {
+                  struct table_entry *e = &fdesc->index[count];
+
+                  e->fde_offset = item_start - (unw_word_t) (uintptr_t) buf;
+                  e->start_ip_offset = this_pi.start_ip;
+                }
+
+              count++;
+            }
+        /*else
+            Debug (1, "FDE parse failed\n");*/
+        }
+
+      addr = item_end;
+    }
+  return count;
+}
+
+static void
+debug_frame_index_sort (struct unw_debug_frame_list *fdesc)
+{
+  size_t i, j, k, n = fdesc->index_size / sizeof (*fdesc->index);
+  struct table_entry *a = fdesc->index;
+  struct table_entry t;
+
+  /* Use a simple Shell sort as it relatively fast and
+   * does not require additional memory. */
+
+  for (k = n / 2; k > 0; k /= 2)
+    {
+      for (i = k; i < n; i++)
+        {
+          t = a[i];
+
+          for (j = i; j >= k; j -= k)
+            {
+              if (t.start_ip_offset >= a[j - k].start_ip_offset)
+                break;
+
+              a[j] = a[j - k];
+            }
+
+          a[j] = t;
+        }
+    }
+}
+
+int
+dwarf_find_debug_frame (int found, unw_dyn_info_t *di_debug, unw_word_t ip,
+                        unw_word_t segbase, const char* obj_name,
+                        unw_word_t start, unw_word_t end)
+{
+  unw_dyn_info_t *di = di_debug;
+  struct unw_debug_frame_list *fdesc;
+
+  Debug (15, "Trying to find .debug_frame for %s\n", obj_name);
+
+  fdesc = locate_debug_info (unw_local_addr_space, ip, obj_name, start, end);
+
+  if (!fdesc)
+    {
+      Debug (15, "couldn't load .debug_frame\n");
+      return found;
+    }
+
+  Debug (15, "loaded .debug_frame\n");
+
+  if (fdesc->debug_frame_size == 0)
+    {
+      Debug (15, "zero-length .debug_frame\n");
+      return found;
+    }
+
+  /* Now create a binary-search table, if it does not already exist. */
+
+  if (!fdesc->index)
+    {
+      /* Find all FDE entries in debug_frame, and make into a sorted
+         index. First determine an index element count. */
+
+      size_t count = debug_frame_index_make (fdesc);
+
+      if (!count)
+        {
+          Debug (15, "no CIE/FDE found in .debug_frame\n");
+          return found;
+        }
+
+      fdesc->index_size = count * sizeof (*fdesc->index);
+      GET_MEMORY (fdesc->index, fdesc->index_size);
+
+      if (!fdesc->index)
+        {
+          Debug (15, "couldn't allocate a frame index table\n");
+          fdesc->index_size = 0;
+          return found;
+        }
+
+      /* Then fill and sort the index. */
+
+      debug_frame_index_make (fdesc);
+      debug_frame_index_sort (fdesc);
+
+    /*for (i = 0; i < count; i++)
+        {
+          const struct table_entry *e = &fdesc->index[i];
+
+          Debug (15, "ip %x, FDE offset %x\n",
+                 e->start_ip_offset, e->fde_offset);
+        }*/
+    }
+
+  di->format = UNW_INFO_FORMAT_TABLE;
+  di->start_ip = fdesc->start;
+  di->end_ip = fdesc->end;
+  di->u.ti.name_ptr = (unw_word_t) (uintptr_t) obj_name;
+  di->u.ti.table_data = (unw_word_t *) fdesc;
+  di->u.ti.table_len = sizeof (*fdesc) / sizeof (unw_word_t);
+  di->u.ti.segbase = segbase;
+
+  found = 1;
+  Debug (15, "found debug_frame table `%s': segbase=0x%lx, len=%lu, "
+         "gp=0x%lx, table_data=0x%lx\n",
+         (char *) (uintptr_t) di->u.ti.name_ptr,
+         (long) di->u.ti.segbase, (long) di->u.ti.table_len,
+         (long) di->gp, (long) di->u.ti.table_data);
+
+  return found;
+}
+
+#endif /* CONFIG_DEBUG_FRAME */
+
+#ifndef UNW_REMOTE_ONLY
+
+static Elf_W (Addr)
+dwarf_find_eh_frame_section(struct dl_phdr_info *info)
+{
+  int rc;
+  struct elf_image ei;
+  Elf_W (Addr) eh_frame = 0;
+  Elf_W (Shdr)* shdr;
+  const char *file = info->dlpi_name;
+  char exepath[PATH_MAX];
+
+  if (strlen(file) == 0)
+    {
+      tdep_get_exe_image_path(exepath);
+      file = exepath;
+    }
+
+  Debug (1, "looking for .eh_frame section in %s\n",
+         file);
+
+  rc = elf_map_image (&ei, file);
+  if (rc != 0)
+    return 0;
+
+  shdr = elf_w (find_section) (&ei, ".eh_frame");
+  if (!shdr)
+    goto out;
+
+  eh_frame = shdr->sh_addr + info->dlpi_addr;
+  Debug (4, "found .eh_frame at address %lx\n",
+         eh_frame);
+
+out:
+  munmap (ei.image, ei.size);
+
+  return eh_frame;
+}
+
+struct dwarf_callback_data
+  {
+    /* in: */
+    unw_word_t ip;              /* instruction-pointer we're looking for */
+    unw_proc_info_t *pi;        /* proc-info pointer */
+    int need_unwind_info;
+    /* out: */
+    int single_fde;             /* did we find a single FDE? (vs. a table) */
+    unw_dyn_info_t di;          /* table info (if single_fde is false) */
+    unw_dyn_info_t di_debug;    /* additional table info for .debug_frame */
+  };
+
+/* ptr is a pointer to a dwarf_callback_data structure and, on entry,
+   member ip contains the instruction-pointer we're looking
+   for.  */
+HIDDEN int
+dwarf_callback (struct dl_phdr_info *info, size_t size, void *ptr)
+{
+  struct dwarf_callback_data *cb_data = ptr;
+  unw_dyn_info_t *di = &cb_data->di;
+  const Elf_W(Phdr) *phdr, *p_eh_hdr, *p_dynamic, *p_text;
+  unw_word_t addr, eh_frame_start, eh_frame_end, fde_count, ip;
+  Elf_W(Addr) load_base, max_load_addr = 0;
+  int ret, need_unwind_info = cb_data->need_unwind_info;
+  unw_proc_info_t *pi = cb_data->pi;
+  struct dwarf_eh_frame_hdr *hdr = NULL;
+  unw_accessors_t *a;
+  long n;
+  int found = 0;
+  struct dwarf_eh_frame_hdr synth_eh_frame_hdr;
+#ifdef CONFIG_DEBUG_FRAME
+  unw_word_t start, end;
+#endif /* CONFIG_DEBUG_FRAME*/
+
+  ip = cb_data->ip;
+
+  /* Make sure struct dl_phdr_info is at least as big as we need.  */
+  if (size < offsetof (struct dl_phdr_info, dlpi_phnum)
+             + sizeof (info->dlpi_phnum))
+    return -1;
+
+  Debug (15, "checking %s, base=0x%lx)\n",
+         info->dlpi_name, (long) info->dlpi_addr);
+
+  phdr = info->dlpi_phdr;
+  load_base = info->dlpi_addr;
+  p_text = NULL;
+  p_eh_hdr = NULL;
+  p_dynamic = NULL;
+
+  /* See if PC falls into one of the loaded segments.  Find the
+     eh-header segment at the same time.  */
+  for (n = info->dlpi_phnum; --n >= 0; phdr++)
+    {
+      if (phdr->p_type == PT_LOAD)
+        {
+          Elf_W(Addr) vaddr = phdr->p_vaddr + load_base;
+
+          if (ip >= vaddr && ip < vaddr + phdr->p_memsz)
+            p_text = phdr;
+
+          if (vaddr + phdr->p_filesz > max_load_addr)
+            max_load_addr = vaddr + phdr->p_filesz;
+        }
+      else if (phdr->p_type == PT_GNU_EH_FRAME)
+        p_eh_hdr = phdr;
+      else if (phdr->p_type == PT_DYNAMIC)
+        p_dynamic = phdr;
+    }
+
+  if (!p_text)
+    return 0;
+
+  if (p_eh_hdr)
+    {
+      hdr = (struct dwarf_eh_frame_hdr *) (p_eh_hdr->p_vaddr + load_base);
+    }
+  else
+    {
+      Elf_W (Addr) eh_frame;
+      Debug (1, "no .eh_frame_hdr section found\n");
+      eh_frame = dwarf_find_eh_frame_section (info);
+      if (eh_frame)
+        {
+          Debug (1, "using synthetic .eh_frame_hdr section for %s\n",
+                 info->dlpi_name);
+	  synth_eh_frame_hdr.version = DW_EH_VERSION;
+	  synth_eh_frame_hdr.eh_frame_ptr_enc = DW_EH_PE_absptr |
+	    ((sizeof(Elf_W (Addr)) == 4) ? DW_EH_PE_udata4 : DW_EH_PE_udata8);
+          synth_eh_frame_hdr.fde_count_enc = DW_EH_PE_omit;
+          synth_eh_frame_hdr.table_enc = DW_EH_PE_omit;
+	  synth_eh_frame_hdr.eh_frame = eh_frame;
+          hdr = &synth_eh_frame_hdr;
+        }
+    }
+
+  if (hdr)
+    {
+      if (p_dynamic)
+        {
+          /* For dynamicly linked executables and shared libraries,
+             DT_PLTGOT is the value that data-relative addresses are
+             relative to for that object.  We call this the "gp".  */
+          Elf_W(Dyn) *dyn = (Elf_W(Dyn) *)(p_dynamic->p_vaddr + load_base);
+          for (; dyn->d_tag != DT_NULL; ++dyn)
+            if (dyn->d_tag == DT_PLTGOT)
+              {
+                /* Assume that _DYNAMIC is writable and GLIBC has
+                   relocated it (true for x86 at least).  */
+                di->gp = dyn->d_un.d_ptr;
+                break;
+              }
+        }
+      else
+        /* Otherwise this is a static executable with no _DYNAMIC.  Assume
+           that data-relative addresses are relative to 0, i.e.,
+           absolute.  */
+        di->gp = 0;
+      pi->gp = di->gp;
+
+      if (hdr->version != DW_EH_VERSION)
+        {
+          Debug (1, "table `%s' has unexpected version %d\n",
+                 info->dlpi_name, hdr->version);
+          return 0;
+        }
+
+      a = unw_get_accessors_int (unw_local_addr_space);
+      addr = (unw_word_t) (uintptr_t) (&hdr->eh_frame);
+
+      /* (Optionally) read eh_frame_ptr: */
+      if ((ret = dwarf_read_encoded_pointer (unw_local_addr_space, a,
+                                             &addr, hdr->eh_frame_ptr_enc, pi,
+                                             &eh_frame_start, NULL)) < 0)
+        return ret;
+
+      /* (Optionally) read fde_count: */
+      if ((ret = dwarf_read_encoded_pointer (unw_local_addr_space, a,
+                                             &addr, hdr->fde_count_enc, pi,
+                                             &fde_count, NULL)) < 0)
+        return ret;
+
+      if (hdr->table_enc != (DW_EH_PE_datarel | DW_EH_PE_sdata4))
+        {
+          /* If there is no search table or it has an unsupported
+             encoding, fall back on linear search.  */
+          if (hdr->table_enc == DW_EH_PE_omit)
+            Debug (4, "table `%s' lacks search table; doing linear search\n",
+                   info->dlpi_name);
+          else
+            Debug (4, "table `%s' has encoding 0x%x; doing linear search\n",
+                   info->dlpi_name, hdr->table_enc);
+
+          eh_frame_end = max_load_addr; /* XXX can we do better? */
+
+          if (hdr->fde_count_enc == DW_EH_PE_omit)
+            fde_count = ~0UL;
+          if (hdr->eh_frame_ptr_enc == DW_EH_PE_omit)
+            abort ();
+
+          Debug (1, "eh_frame_start = %lx eh_frame_end = %lx\n",
+                 eh_frame_start, eh_frame_end);
+
+          /* XXX we know how to build a local binary search table for
+             .debug_frame, so we could do that here too.  */
+          found = linear_search (unw_local_addr_space, ip,
+                                 eh_frame_start, eh_frame_end, fde_count,
+                                 pi, need_unwind_info, NULL);
+          if (found != 1)
+            found = 0;
+	  else
+	    cb_data->single_fde = 1;
+        }
+      else
+        {
+          di->format = UNW_INFO_FORMAT_REMOTE_TABLE;
+          di->start_ip = p_text->p_vaddr + load_base;
+          di->end_ip = p_text->p_vaddr + load_base + p_text->p_memsz;
+          di->u.rti.name_ptr = (unw_word_t) (uintptr_t) info->dlpi_name;
+          di->u.rti.table_data = addr;
+          assert (sizeof (struct table_entry) % sizeof (unw_word_t) == 0);
+          di->u.rti.table_len = (fde_count * sizeof (struct table_entry)
+                                 / sizeof (unw_word_t));
+          /* For the binary-search table in the eh_frame_hdr, data-relative
+             means relative to the start of that section... */
+          di->u.rti.segbase = (unw_word_t) (uintptr_t) hdr;
+
+          found = 1;
+          Debug (15, "found table `%s': segbase=0x%lx, len=%lu, gp=0x%lx, "
+                 "table_data=0x%lx\n", (char *) (uintptr_t) di->u.rti.name_ptr,
+                 (long) di->u.rti.segbase, (long) di->u.rti.table_len,
+                 (long) di->gp, (long) di->u.rti.table_data);
+        }
+    }
+
+#ifdef CONFIG_DEBUG_FRAME
+  /* Find the start/end of the described region by parsing the phdr_info
+     structure.  */
+  start = (unw_word_t) -1;
+  end = 0;
+
+  for (n = 0; n < info->dlpi_phnum; n++)
+    {
+      if (info->dlpi_phdr[n].p_type == PT_LOAD)
+        {
+          unw_word_t seg_start = info->dlpi_addr + info->dlpi_phdr[n].p_vaddr;
+          unw_word_t seg_end = seg_start + info->dlpi_phdr[n].p_memsz;
+
+          if (seg_start < start)
+            start = seg_start;
+
+          if (seg_end > end)
+            end = seg_end;
+        }
+    }
+
+  found = dwarf_find_debug_frame (found, &cb_data->di_debug, ip,
+                                  info->dlpi_addr, info->dlpi_name, start,
+                                  end);
+#endif  /* CONFIG_DEBUG_FRAME */
+
+  return found;
+}
+
+HIDDEN int
+dwarf_find_proc_info (unw_addr_space_t as, unw_word_t ip,
+                      unw_proc_info_t *pi, int need_unwind_info, void *arg)
+{
+  struct dwarf_callback_data cb_data;
+  intrmask_t saved_mask;
+  int ret;
+
+  Debug (14, "looking for IP=0x%lx\n", (long) ip);
+
+  memset (&cb_data, 0, sizeof (cb_data));
+  cb_data.ip = ip;
+  cb_data.pi = pi;
+  cb_data.need_unwind_info = need_unwind_info;
+  cb_data.di.format = -1;
+  cb_data.di_debug.format = -1;
+
+  SIGPROCMASK (SIG_SETMASK, &unwi_full_mask, &saved_mask);
+  ret = dl_iterate_phdr (dwarf_callback, &cb_data);
+  SIGPROCMASK (SIG_SETMASK, &saved_mask, NULL);
+
+  if (ret > 0)
+    {
+      if (cb_data.single_fde)
+	/* already got the result in *pi */
+	return 0;
+
+      /* search the table: */
+      if (cb_data.di.format != -1)
+	ret = dwarf_search_unwind_table_int (as, ip, &cb_data.di,
+					     pi, need_unwind_info, arg);
+      else
+	ret = -UNW_ENOINFO;
+
+      if (ret == -UNW_ENOINFO && cb_data.di_debug.format != -1)
+	ret = dwarf_search_unwind_table_int (as, ip, &cb_data.di_debug, pi,
+					     need_unwind_info, arg);
+    }
+  else
+    ret = -UNW_ENOINFO;
+
+  return ret;
+}
+
+static inline const struct table_entry *
+lookup (const struct table_entry *table, size_t table_size, int32_t rel_ip)
+{
+  unsigned long table_len = table_size / sizeof (struct table_entry);
+  const struct table_entry *e = NULL;
+  unsigned long lo, hi, mid;
+
+  /* do a binary search for right entry: */
+  for (lo = 0, hi = table_len; lo < hi;)
+    {
+      mid = (lo + hi) / 2;
+      e = table + mid;
+      Debug (15, "e->start_ip_offset = %lx\n", (long) e->start_ip_offset);
+      if (rel_ip < e->start_ip_offset)
+        hi = mid;
+      else
+        lo = mid + 1;
+    }
+  if (hi <= 0)
+        return NULL;
+  e = table + hi - 1;
+  return e;
+}
+
+#endif /* !UNW_REMOTE_ONLY */
+
+#ifndef UNW_LOCAL_ONLY
+
+/* Lookup an unwind-table entry in remote memory.  Returns 1 if an
+   entry is found, 0 if no entry is found, negative if an error
+   occurred reading remote memory.  */
+static int
+remote_lookup (unw_addr_space_t as,
+               unw_word_t table, size_t table_size, int32_t rel_ip,
+               struct table_entry *e, int32_t *last_ip_offset, void *arg)
+{
+  unsigned long table_len = table_size / sizeof (struct table_entry);
+  unw_accessors_t *a = unw_get_accessors_int (as);
+  unsigned long lo, hi, mid;
+  unw_word_t e_addr = 0;
+  int32_t start = 0;
+  int ret;
+
+  /* do a binary search for right entry: */
+  for (lo = 0, hi = table_len; lo < hi;)
+    {
+      mid = (lo + hi) / 2;
+      e_addr = table + mid * sizeof (struct table_entry);
+      if ((ret = dwarf_reads32 (as, a, &e_addr, &start, arg)) < 0)
+        return ret;
+
+      if (rel_ip < start)
+        hi = mid;
+      else
+        lo = mid + 1;
+    }
+  if (hi <= 0)
+    return 0;
+  e_addr = table + (hi - 1) * sizeof (struct table_entry);
+  if ((ret = dwarf_reads32 (as, a, &e_addr, &e->start_ip_offset, arg)) < 0
+   || (ret = dwarf_reads32 (as, a, &e_addr, &e->fde_offset, arg)) < 0
+   || (hi < table_len &&
+       (ret = dwarf_reads32 (as, a, &e_addr, last_ip_offset, arg)) < 0))
+    return ret;
+  return 1;
+}
+
+#endif /* !UNW_LOCAL_ONLY */
+
+static int is_remote_table(int format)
+{
+  return (format == UNW_INFO_FORMAT_REMOTE_TABLE ||
+          format == UNW_INFO_FORMAT_IP_OFFSET);
+}
+
+int
+dwarf_search_unwind_table (unw_addr_space_t as, unw_word_t ip,
+                           unw_dyn_info_t *di, unw_proc_info_t *pi,
+                           int need_unwind_info, void *arg)
+{
+  const struct table_entry *e = NULL, *table;
+  unw_word_t ip_base = 0, segbase = 0, last_ip, fde_addr;
+  unw_accessors_t *a;
+#ifndef UNW_LOCAL_ONLY
+  struct table_entry ent;
+#endif
+  int ret;
+  unw_word_t debug_frame_base;
+  size_t table_len;
+
+#ifdef UNW_REMOTE_ONLY
+  assert (is_remote_table(di->format));
+#else
+  assert (is_remote_table(di->format)
+          || di->format == UNW_INFO_FORMAT_TABLE);
+#endif
+  assert (ip >= di->start_ip && ip < di->end_ip);
+
+  if (is_remote_table(di->format))
+    {
+      table = (const struct table_entry *) (uintptr_t) di->u.rti.table_data;
+      table_len = di->u.rti.table_len * sizeof (unw_word_t);
+      debug_frame_base = 0;
+    }
+  else
+    {
+      assert(di->format == UNW_INFO_FORMAT_TABLE);
+#ifndef UNW_REMOTE_ONLY
+      struct unw_debug_frame_list *fdesc = (void *) di->u.ti.table_data;
+
+      /* UNW_INFO_FORMAT_TABLE (i.e. .debug_frame) is read from local address
+         space.  Both the index and the unwind tables live in local memory, but
+         the address space to check for properties like the address size and
+         endianness is the target one.  */
+      as = unw_local_addr_space;
+      table = fdesc->index;
+      table_len = fdesc->index_size;
+      debug_frame_base = (uintptr_t) fdesc->debug_frame;
+#endif
+    }
+
+  a = unw_get_accessors_int (as);
+
+  segbase = di->u.rti.segbase;
+  if (di->format == UNW_INFO_FORMAT_IP_OFFSET) {
+    ip_base = di->start_ip;
+  } else {
+    ip_base = segbase;
+  }
+
+#ifndef UNW_REMOTE_ONLY
+  if (as == unw_local_addr_space)
+    {
+      e = lookup (table, table_len, ip - ip_base);
+      if (e && &e[1] < &table[table_len])
+	last_ip = e[1].start_ip_offset + ip_base;
+      else
+	last_ip = di->end_ip;
+    }
+  else
+#endif
+    {
+#ifndef UNW_LOCAL_ONLY
+      int32_t last_ip_offset = di->end_ip - ip_base;
+      segbase = di->u.rti.segbase;
+      if ((ret = remote_lookup (as, (uintptr_t) table, table_len,
+                                ip - ip_base, &ent, &last_ip_offset, arg)) < 0)
+        return ret;
+      if (ret)
+	{
+	  e = &ent;
+	  last_ip = last_ip_offset + ip_base;
+	}
+      else
+        e = NULL;       /* no info found */
+#endif
+    }
+  if (!e)
+    {
+      Debug (1, "IP %lx inside range %lx-%lx, but no explicit unwind info found\n",
+             (long) ip, (long) di->start_ip, (long) di->end_ip);
+      /* IP is inside this table's range, but there is no explicit
+         unwind info.  */
+      return -UNW_ENOINFO;
+    }
+  Debug (15, "ip=0x%lx, start_ip=0x%lx\n",
+         (long) ip, (long) (e->start_ip_offset));
+  if (debug_frame_base)
+    fde_addr = e->fde_offset + debug_frame_base;
+  else
+    fde_addr = e->fde_offset + segbase;
+  Debug (1, "e->fde_offset = %lx, segbase = %lx, debug_frame_base = %lx, "
+            "fde_addr = %lx\n", (long) e->fde_offset, (long) segbase,
+            (long) debug_frame_base, (long) fde_addr);
+  if ((ret = dwarf_extract_proc_info_from_fde (as, a, &fde_addr, pi,
+                                               debug_frame_base ?
+                                               debug_frame_base : segbase,
+                                               need_unwind_info,
+                                               debug_frame_base != 0, arg)) < 0)
+    return ret;
+
+  /* .debug_frame uses an absolute encoding that does not know about any
+     shared library relocation.  */
+  if (di->format == UNW_INFO_FORMAT_TABLE)
+    {
+      pi->start_ip += segbase;
+      pi->end_ip += segbase;
+      pi->flags = UNW_PI_FLAG_DEBUG_FRAME;
+    }
+
+#if defined(NEED_LAST_IP)
+  pi->last_ip = last_ip;
+#else
+  (void)last_ip;
+#endif
+  if (ip < pi->start_ip || ip >= pi->end_ip)
+    return -UNW_ENOINFO;
+
+  return 0;
+}
+
+HIDDEN void
+dwarf_put_unwind_info (unw_addr_space_t as, unw_proc_info_t *pi, void *arg)
+{
+  return;       /* always a nop */
+}
diff --git a/src/third_party/unwind/dist/src/dwarf/Gfind_unwind_table.c b/src/third_party/unwind/dist/src/dwarf/Gfind_unwind_table.c
new file mode 100644
index 00000000000..6a2ad504078
--- /dev/null
+++ b/src/third_party/unwind/dist/src/dwarf/Gfind_unwind_table.c
@@ -0,0 +1,230 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <fcntl.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <sys/mman.h>
+
+#include "libunwind_i.h"
+#include "dwarf-eh.h"
+#include "dwarf_i.h"
+
+#define to_unw_word(p) ((unw_word_t) (uintptr_t) (p))
+
+int
+dwarf_find_unwind_table (struct elf_dyn_info *edi, unw_addr_space_t as,
+                         char *path, unw_word_t segbase, unw_word_t mapoff,
+                         unw_word_t ip)
+{
+  Elf_W(Phdr) *phdr, *ptxt = NULL, *peh_hdr = NULL, *pdyn = NULL;
+  unw_word_t addr, eh_frame_start, fde_count, load_base;
+  unw_word_t max_load_addr = 0;
+  unw_word_t start_ip = to_unw_word (-1);
+  unw_word_t end_ip = 0;
+  struct dwarf_eh_frame_hdr *hdr;
+  unw_proc_info_t pi;
+  unw_accessors_t *a;
+  Elf_W(Ehdr) *ehdr;
+#if UNW_TARGET_ARM
+  const Elf_W(Phdr) *parm_exidx = NULL;
+#endif
+  int i, ret, found = 0;
+
+  /* XXX: Much of this code is Linux/LSB-specific.  */
+
+  if (!elf_w(valid_object) (&edi->ei))
+    return -UNW_ENOINFO;
+
+  ehdr = edi->ei.image;
+  phdr = (Elf_W(Phdr) *) ((char *) edi->ei.image + ehdr->e_phoff);
+
+  for (i = 0; i < ehdr->e_phnum; ++i)
+    {
+      switch (phdr[i].p_type)
+        {
+        case PT_LOAD:
+          if (phdr[i].p_vaddr < start_ip)
+            start_ip = phdr[i].p_vaddr;
+
+          if (phdr[i].p_vaddr + phdr[i].p_memsz > end_ip)
+            end_ip = phdr[i].p_vaddr + phdr[i].p_memsz;
+
+          if (phdr[i].p_offset == mapoff)
+            ptxt = phdr + i;
+          if ((uintptr_t) edi->ei.image + phdr->p_filesz > max_load_addr)
+            max_load_addr = (uintptr_t) edi->ei.image + phdr->p_filesz;
+          break;
+
+        case PT_GNU_EH_FRAME:
+          peh_hdr = phdr + i;
+          break;
+
+        case PT_DYNAMIC:
+          pdyn = phdr + i;
+          break;
+
+#if UNW_TARGET_ARM
+        case PT_ARM_EXIDX:
+          parm_exidx = phdr + i;
+          break;
+#endif
+
+        default:
+          break;
+        }
+    }
+
+  if (!ptxt)
+    return 0;
+
+  load_base = segbase - ptxt->p_vaddr;
+  start_ip += load_base;
+  end_ip += load_base;
+
+  if (peh_hdr)
+    {
+      if (pdyn)
+        {
+          /* For dynamicly linked executables and shared libraries,
+             DT_PLTGOT is the value that data-relative addresses are
+             relative to for that object.  We call this the "gp".  */
+                Elf_W(Dyn) *dyn = (Elf_W(Dyn) *)(pdyn->p_offset
+                                                 + (char *) edi->ei.image);
+          for (; dyn->d_tag != DT_NULL; ++dyn)
+            if (dyn->d_tag == DT_PLTGOT)
+              {
+                /* Assume that _DYNAMIC is writable and GLIBC has
+                   relocated it (true for x86 at least).  */
+                edi->di_cache.gp = dyn->d_un.d_ptr;
+                break;
+              }
+        }
+      else
+        /* Otherwise this is a static executable with no _DYNAMIC.  Assume
+           that data-relative addresses are relative to 0, i.e.,
+           absolute.  */
+        edi->di_cache.gp = 0;
+
+      hdr = (struct dwarf_eh_frame_hdr *) (peh_hdr->p_offset
+                                           + (char *) edi->ei.image);
+      if (hdr->version != DW_EH_VERSION)
+        {
+          Debug (1, "table `%s' has unexpected version %d\n",
+                 path, hdr->version);
+          return -UNW_ENOINFO;
+        }
+
+      a = unw_get_accessors_int (unw_local_addr_space);
+      addr = to_unw_word (&hdr->eh_frame);
+
+      /* Fill in a dummy proc_info structure.  We just need to fill in
+         enough to ensure that dwarf_read_encoded_pointer() can do it's
+         job.  Since we don't have a procedure-context at this point, all
+         we have to do is fill in the global-pointer.  */
+      memset (&pi, 0, sizeof (pi));
+      pi.gp = edi->di_cache.gp;
+
+      /* (Optionally) read eh_frame_ptr: */
+      if ((ret = dwarf_read_encoded_pointer (unw_local_addr_space, a,
+                                             &addr, hdr->eh_frame_ptr_enc, &pi,
+                                             &eh_frame_start, NULL)) < 0)
+        return -UNW_ENOINFO;
+
+      /* (Optionally) read fde_count: */
+      if ((ret = dwarf_read_encoded_pointer (unw_local_addr_space, a,
+                                             &addr, hdr->fde_count_enc, &pi,
+                                             &fde_count, NULL)) < 0)
+        return -UNW_ENOINFO;
+
+      if (hdr->table_enc != (DW_EH_PE_datarel | DW_EH_PE_sdata4))
+        {
+    #if 1
+          abort ();
+    #else
+          unw_word_t eh_frame_end;
+
+          /* If there is no search table or it has an unsupported
+             encoding, fall back on linear search.  */
+          if (hdr->table_enc == DW_EH_PE_omit)
+            Debug (4, "EH lacks search table; doing linear search\n");
+          else
+            Debug (4, "EH table has encoding 0x%x; doing linear search\n",
+                   hdr->table_enc);
+
+          eh_frame_end = max_load_addr; /* XXX can we do better? */
+
+          if (hdr->fde_count_enc == DW_EH_PE_omit)
+            fde_count = ~0UL;
+          if (hdr->eh_frame_ptr_enc == DW_EH_PE_omit)
+            abort ();
+
+          return linear_search (unw_local_addr_space, ip,
+                                eh_frame_start, eh_frame_end, fde_count,
+                                pi, need_unwind_info, NULL);
+    #endif
+        }
+
+      edi->di_cache.start_ip = start_ip;
+      edi->di_cache.end_ip = end_ip;
+      edi->di_cache.format = UNW_INFO_FORMAT_REMOTE_TABLE;
+      edi->di_cache.u.rti.name_ptr = 0;
+      /* two 32-bit values (ip_offset/fde_offset) per table-entry: */
+      edi->di_cache.u.rti.table_len = (fde_count * 8) / sizeof (unw_word_t);
+      edi->di_cache.u.rti.table_data = ((load_base + peh_hdr->p_vaddr)
+                                       + (addr - to_unw_word (edi->ei.image)
+                                          - peh_hdr->p_offset));
+
+      /* For the binary-search table in the eh_frame_hdr, data-relative
+         means relative to the start of that section... */
+      edi->di_cache.u.rti.segbase = ((load_base + peh_hdr->p_vaddr)
+                                    + (to_unw_word (hdr) -
+                                       to_unw_word (edi->ei.image)
+                                       - peh_hdr->p_offset));
+      found = 1;
+    }
+
+#if UNW_TARGET_ARM
+  if (parm_exidx)
+    {
+      edi->di_arm.format = UNW_INFO_FORMAT_ARM_EXIDX;
+      edi->di_arm.start_ip = start_ip;
+      edi->di_arm.end_ip = end_ip;
+      edi->di_arm.u.rti.name_ptr = to_unw_word (path);
+      edi->di_arm.u.rti.table_data = load_base + parm_exidx->p_vaddr;
+      edi->di_arm.u.rti.table_len = parm_exidx->p_memsz;
+      found = 1;
+    }
+#endif
+
+#ifdef CONFIG_DEBUG_FRAME
+  /* Try .debug_frame. */
+  found = dwarf_find_debug_frame (found, &edi->di_debug, ip, load_base, path,
+                                  start_ip, end_ip);
+#endif
+
+  return found;
+}
diff --git a/src/third_party/unwind/dist/src/dwarf/Gparser.c b/src/third_party/unwind/dist/src/dwarf/Gparser.c
new file mode 100644
index 00000000000..fe7c5817c3d
--- /dev/null
+++ b/src/third_party/unwind/dist/src/dwarf/Gparser.c
@@ -0,0 +1,1074 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2003, 2005 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "dwarf_i.h"
+#include "libunwind_i.h"
+#include <stddef.h>
+#include <limits.h>
+
+#define alloc_reg_state()       (mempool_alloc (&dwarf_reg_state_pool))
+#define free_reg_state(rs)      (mempool_free (&dwarf_reg_state_pool, rs))
+
+#define DWARF_UNW_CACHE_SIZE(log_size)   (1 << log_size)
+#define DWARF_UNW_HASH_SIZE(log_size)    (1 << (log_size + 1))
+
+static inline int
+read_regnum (unw_addr_space_t as, unw_accessors_t *a, unw_word_t *addr,
+             unw_word_t *valp, void *arg)
+{
+  int ret;
+
+  if ((ret = dwarf_read_uleb128 (as, a, addr, valp, arg)) < 0)
+    return ret;
+
+  if (*valp >= DWARF_NUM_PRESERVED_REGS)
+    {
+      Debug (1, "Invalid register number %u\n", (unsigned int) *valp);
+      return -UNW_EBADREG;
+    }
+  return 0;
+}
+
+static inline void
+set_reg (dwarf_state_record_t *sr, unw_word_t regnum, dwarf_where_t where,
+         unw_word_t val)
+{
+  sr->rs_current.reg.where[regnum] = where;
+  sr->rs_current.reg.val[regnum] = val;
+}
+
+static inline int
+push_rstate_stack(dwarf_stackable_reg_state_t **rs_stack)
+{
+  dwarf_stackable_reg_state_t *old_rs = *rs_stack;
+  if (NULL == (*rs_stack = alloc_reg_state ()))
+    {
+      *rs_stack = old_rs;
+      return -1;
+    }
+  (*rs_stack)->next = old_rs;
+  return 0;
+}
+
+static inline void
+pop_rstate_stack(dwarf_stackable_reg_state_t **rs_stack)
+{
+  dwarf_stackable_reg_state_t *old_rs = *rs_stack;
+  *rs_stack = old_rs->next;
+  free_reg_state (old_rs);
+}
+
+static inline void
+empty_rstate_stack(dwarf_stackable_reg_state_t **rs_stack)
+{
+  while (*rs_stack)
+    pop_rstate_stack(rs_stack);
+}
+
+/* Run a CFI program to update the register state.  */
+static int
+run_cfi_program (struct dwarf_cursor *c, dwarf_state_record_t *sr,
+                 unw_word_t *ip, unw_word_t end_ip,
+		 unw_word_t *addr, unw_word_t end_addr,
+		 dwarf_stackable_reg_state_t **rs_stack,
+                 struct dwarf_cie_info *dci)
+{
+  unw_addr_space_t as;
+  void *arg;
+
+  if (c->pi.flags & UNW_PI_FLAG_DEBUG_FRAME)
+    {
+      /* .debug_frame CFI is stored in local address space.  */
+      as = unw_local_addr_space;
+      arg = NULL;
+    }
+  else
+    {
+      as = c->as;
+      arg = c->as_arg;
+    }
+  unw_accessors_t *a = unw_get_accessors_int (as);
+  int ret = 0;
+
+  while (*ip <= end_ip && *addr < end_addr && ret >= 0)
+    {
+      unw_word_t operand = 0, regnum, val, len;
+      uint8_t u8, op;
+      uint16_t u16;
+      uint32_t u32;
+
+      if ((ret = dwarf_readu8 (as, a, addr, &op, arg)) < 0)
+        break;
+
+      if (op & DWARF_CFA_OPCODE_MASK)
+        {
+          operand = op & DWARF_CFA_OPERAND_MASK;
+          op &= ~DWARF_CFA_OPERAND_MASK;
+        }
+      switch ((dwarf_cfa_t) op)
+        {
+        case DW_CFA_advance_loc:
+          *ip += operand * dci->code_align;
+          Debug (15, "CFA_advance_loc to 0x%lx\n", (long) *ip);
+          break;
+
+        case DW_CFA_advance_loc1:
+          if ((ret = dwarf_readu8 (as, a, addr, &u8, arg)) < 0)
+            break;
+          *ip += u8 * dci->code_align;
+          Debug (15, "CFA_advance_loc1 to 0x%lx\n", (long) *ip);
+          break;
+
+        case DW_CFA_advance_loc2:
+          if ((ret = dwarf_readu16 (as, a, addr, &u16, arg)) < 0)
+            break;
+          *ip += u16 * dci->code_align;
+          Debug (15, "CFA_advance_loc2 to 0x%lx\n", (long) *ip);
+          break;
+
+        case DW_CFA_advance_loc4:
+          if ((ret = dwarf_readu32 (as, a, addr, &u32, arg)) < 0)
+            break;
+          *ip += u32 * dci->code_align;
+          Debug (15, "CFA_advance_loc4 to 0x%lx\n", (long) *ip);
+          break;
+
+        case DW_CFA_MIPS_advance_loc8:
+#ifdef UNW_TARGET_MIPS
+          {
+            uint64_t u64 = 0;
+
+            if ((ret = dwarf_readu64 (as, a, addr, &u64, arg)) < 0)
+              break;
+            *ip += u64 * dci->code_align;
+            Debug (15, "CFA_MIPS_advance_loc8\n");
+            break;
+          }
+#else
+          Debug (1, "DW_CFA_MIPS_advance_loc8 on non-MIPS target\n");
+          ret = -UNW_EINVAL;
+          break;
+#endif
+
+        case DW_CFA_offset:
+          regnum = operand;
+          if (regnum >= DWARF_NUM_PRESERVED_REGS)
+            {
+              Debug (1, "Invalid register number %u in DW_cfa_OFFSET\n",
+                     (unsigned int) regnum);
+              ret = -UNW_EBADREG;
+              break;
+            }
+          if ((ret = dwarf_read_uleb128 (as, a, addr, &val, arg)) < 0)
+            break;
+          set_reg (sr, regnum, DWARF_WHERE_CFAREL, val * dci->data_align);
+          Debug (15, "CFA_offset r%lu at cfa+0x%lx\n",
+                 (long) regnum, (long) (val * dci->data_align));
+          break;
+
+        case DW_CFA_offset_extended:
+          if (((ret = read_regnum (as, a, addr, &regnum, arg)) < 0)
+              || ((ret = dwarf_read_uleb128 (as, a, addr, &val, arg)) < 0))
+            break;
+          set_reg (sr, regnum, DWARF_WHERE_CFAREL, val * dci->data_align);
+          Debug (15, "CFA_offset_extended r%lu at cf+0x%lx\n",
+                 (long) regnum, (long) (val * dci->data_align));
+          break;
+
+        case DW_CFA_offset_extended_sf:
+          if (((ret = read_regnum (as, a, addr, &regnum, arg)) < 0)
+              || ((ret = dwarf_read_sleb128 (as, a, addr, &val, arg)) < 0))
+            break;
+          set_reg (sr, regnum, DWARF_WHERE_CFAREL, val * dci->data_align);
+          Debug (15, "CFA_offset_extended_sf r%lu at cf+0x%lx\n",
+                 (long) regnum, (long) (val * dci->data_align));
+          break;
+
+        case DW_CFA_restore:
+          regnum = operand;
+          if (regnum >= DWARF_NUM_PRESERVED_REGS)
+            {
+              Debug (1, "Invalid register number %u in DW_CFA_restore\n",
+                     (unsigned int) regnum);
+              ret = -UNW_EINVAL;
+              break;
+            }
+          sr->rs_current.reg.where[regnum] = sr->rs_initial.reg.where[regnum];
+          sr->rs_current.reg.val[regnum] = sr->rs_initial.reg.val[regnum];
+          Debug (15, "CFA_restore r%lu\n", (long) regnum);
+          break;
+
+        case DW_CFA_restore_extended:
+          if ((ret = dwarf_read_uleb128 (as, a, addr, &regnum, arg)) < 0)
+            break;
+          if (regnum >= DWARF_NUM_PRESERVED_REGS)
+            {
+              Debug (1, "Invalid register number %u in "
+                     "DW_CFA_restore_extended\n", (unsigned int) regnum);
+              ret = -UNW_EINVAL;
+              break;
+            }
+          sr->rs_current.reg.where[regnum] = sr->rs_initial.reg.where[regnum];
+          sr->rs_current.reg.val[regnum] = sr->rs_initial.reg.val[regnum];
+          Debug (15, "CFA_restore_extended r%lu\n", (long) regnum);
+          break;
+
+        case DW_CFA_nop:
+          break;
+
+        case DW_CFA_set_loc:
+          if ((ret = dwarf_read_encoded_pointer (as, a, addr, dci->fde_encoding,
+                                                 &c->pi, ip,
+                                                 arg)) < 0)
+            break;
+          Debug (15, "CFA_set_loc to 0x%lx\n", (long) *ip);
+          break;
+
+        case DW_CFA_undefined:
+          if ((ret = read_regnum (as, a, addr, &regnum, arg)) < 0)
+            break;
+          set_reg (sr, regnum, DWARF_WHERE_UNDEF, 0);
+          Debug (15, "CFA_undefined r%lu\n", (long) regnum);
+          break;
+
+        case DW_CFA_same_value:
+          if ((ret = read_regnum (as, a, addr, &regnum, arg)) < 0)
+            break;
+          set_reg (sr, regnum, DWARF_WHERE_SAME, 0);
+          Debug (15, "CFA_same_value r%lu\n", (long) regnum);
+          break;
+
+        case DW_CFA_register:
+          if (((ret = read_regnum (as, a, addr, &regnum, arg)) < 0)
+              || ((ret = dwarf_read_uleb128 (as, a, addr, &val, arg)) < 0))
+            break;
+          set_reg (sr, regnum, DWARF_WHERE_REG, val);
+          Debug (15, "CFA_register r%lu to r%lu\n", (long) regnum, (long) val);
+          break;
+
+        case DW_CFA_remember_state:
+	  if (push_rstate_stack(rs_stack) < 0)
+	    {
+              Debug (1, "Out of memory in DW_CFA_remember_state\n");
+              ret = -UNW_ENOMEM;
+              break;
+	    }
+          (*rs_stack)->state = sr->rs_current;
+          Debug (15, "CFA_remember_state\n");
+          break;
+
+        case DW_CFA_restore_state:
+          if (!*rs_stack)
+            {
+              Debug (1, "register-state stack underflow\n");
+              ret = -UNW_EINVAL;
+              break;
+            }
+          sr->rs_current = (*rs_stack)->state;
+          pop_rstate_stack(rs_stack);
+          Debug (15, "CFA_restore_state\n");
+          break;
+
+        case DW_CFA_def_cfa:
+          if (((ret = read_regnum (as, a, addr, &regnum, arg)) < 0)
+              || ((ret = dwarf_read_uleb128 (as, a, addr, &val, arg)) < 0))
+            break;
+          set_reg (sr, DWARF_CFA_REG_COLUMN, DWARF_WHERE_REG, regnum);
+          set_reg (sr, DWARF_CFA_OFF_COLUMN, 0, val);   /* NOT factored! */
+          Debug (15, "CFA_def_cfa r%lu+0x%lx\n", (long) regnum, (long) val);
+          break;
+
+        case DW_CFA_def_cfa_sf:
+          if (((ret = read_regnum (as, a, addr, &regnum, arg)) < 0)
+              || ((ret = dwarf_read_sleb128 (as, a, addr, &val, arg)) < 0))
+            break;
+          set_reg (sr, DWARF_CFA_REG_COLUMN, DWARF_WHERE_REG, regnum);
+          set_reg (sr, DWARF_CFA_OFF_COLUMN, 0,
+                   val * dci->data_align);              /* factored! */
+          Debug (15, "CFA_def_cfa_sf r%lu+0x%lx\n",
+                 (long) regnum, (long) (val * dci->data_align));
+          break;
+
+        case DW_CFA_def_cfa_register:
+          if ((ret = read_regnum (as, a, addr, &regnum, arg)) < 0)
+            break;
+          set_reg (sr, DWARF_CFA_REG_COLUMN, DWARF_WHERE_REG, regnum);
+          Debug (15, "CFA_def_cfa_register r%lu\n", (long) regnum);
+          break;
+
+        case DW_CFA_def_cfa_offset:
+          if ((ret = dwarf_read_uleb128 (as, a, addr, &val, arg)) < 0)
+            break;
+          set_reg (sr, DWARF_CFA_OFF_COLUMN, 0, val);   /* NOT factored! */
+          Debug (15, "CFA_def_cfa_offset 0x%lx\n", (long) val);
+          break;
+
+        case DW_CFA_def_cfa_offset_sf:
+          if ((ret = dwarf_read_sleb128 (as, a, addr, &val, arg)) < 0)
+            break;
+          set_reg (sr, DWARF_CFA_OFF_COLUMN, 0,
+                   val * dci->data_align);      /* factored! */
+          Debug (15, "CFA_def_cfa_offset_sf 0x%lx\n",
+                 (long) (val * dci->data_align));
+          break;
+
+        case DW_CFA_def_cfa_expression:
+          /* Save the address of the DW_FORM_block for later evaluation. */
+          set_reg (sr, DWARF_CFA_REG_COLUMN, DWARF_WHERE_EXPR, *addr);
+
+          if ((ret = dwarf_read_uleb128 (as, a, addr, &len, arg)) < 0)
+            break;
+
+          Debug (15, "CFA_def_cfa_expr @ 0x%lx [%lu bytes]\n",
+                 (long) *addr, (long) len);
+          *addr += len;
+          break;
+
+        case DW_CFA_expression:
+          if ((ret = read_regnum (as, a, addr, &regnum, arg)) < 0)
+            break;
+
+          /* Save the address of the DW_FORM_block for later evaluation. */
+          set_reg (sr, regnum, DWARF_WHERE_EXPR, *addr);
+
+          if ((ret = dwarf_read_uleb128 (as, a, addr, &len, arg)) < 0)
+            break;
+
+          Debug (15, "CFA_expression r%lu @ 0x%lx [%lu bytes]\n",
+                 (long) regnum, (long) addr, (long) len);
+          *addr += len;
+          break;
+
+        case DW_CFA_val_expression:
+          if ((ret = read_regnum (as, a, addr, &regnum, arg)) < 0)
+            break;
+
+          /* Save the address of the DW_FORM_block for later evaluation. */
+          set_reg (sr, regnum, DWARF_WHERE_VAL_EXPR, *addr);
+
+          if ((ret = dwarf_read_uleb128 (as, a, addr, &len, arg)) < 0)
+            break;
+
+          Debug (15, "CFA_val_expression r%lu @ 0x%lx [%lu bytes]\n",
+                 (long) regnum, (long) addr, (long) len);
+          *addr += len;
+          break;
+
+        case DW_CFA_GNU_args_size:
+          if ((ret = dwarf_read_uleb128 (as, a, addr, &val, arg)) < 0)
+            break;
+          sr->args_size = val;
+          Debug (15, "CFA_GNU_args_size %lu\n", (long) val);
+          break;
+
+        case DW_CFA_GNU_negative_offset_extended:
+          /* A comment in GCC says that this is obsoleted by
+             DW_CFA_offset_extended_sf, but that it's used by older
+             PowerPC code.  */
+          if (((ret = read_regnum (as, a, addr, &regnum, arg)) < 0)
+              || ((ret = dwarf_read_uleb128 (as, a, addr, &val, arg)) < 0))
+            break;
+          set_reg (sr, regnum, DWARF_WHERE_CFAREL, -(val * dci->data_align));
+          Debug (15, "CFA_GNU_negative_offset_extended cfa+0x%lx\n",
+                 (long) -(val * dci->data_align));
+          break;
+
+        case DW_CFA_GNU_window_save:
+#ifdef UNW_TARGET_SPARC
+          /* This is a special CFA to handle all 16 windowed registers
+             on SPARC.  */
+          for (regnum = 16; regnum < 32; ++regnum)
+            set_reg (sr, regnum, DWARF_WHERE_CFAREL,
+                     (regnum - 16) * sizeof (unw_word_t));
+          Debug (15, "CFA_GNU_window_save\n");
+          break;
+#else
+          /* FALL THROUGH */
+#endif
+        case DW_CFA_lo_user:
+        case DW_CFA_hi_user:
+          Debug (1, "Unexpected CFA opcode 0x%x\n", op);
+          ret = -UNW_EINVAL;
+          break;
+        }
+    }
+
+  if (ret > 0)
+    ret = 0;
+  return ret;
+}
+
+static int
+fetch_proc_info (struct dwarf_cursor *c, unw_word_t ip)
+{
+  int ret, dynamic = 1;
+
+  /* The 'ip' can point either to the previous or next instruction
+     depending on what type of frame we have: normal call or a place
+     to resume execution (e.g. after signal frame).
+
+     For a normal call frame we need to back up so we point within the
+     call itself; this is important because a) the call might be the
+     very last instruction of the function and the edge of the FDE,
+     and b) so that run_cfi_program() runs locations up to the call
+     but not more.
+
+     For signal frame, we need to do the exact opposite and look
+     up using the current 'ip' value.  That is where execution will
+     continue, and it's important we get this right, as 'ip' could be
+     right at the function entry and hence FDE edge, or at instruction
+     that manipulates CFA (push/pop). */
+  if (c->use_prev_instr)
+    --ip;
+
+  memset (&c->pi, 0, sizeof (c->pi));
+
+  /* check dynamic info first --- it overrides everything else */
+  ret = unwi_find_dynamic_proc_info (c->as, ip, &c->pi, 1,
+                                     c->as_arg);
+  if (ret == -UNW_ENOINFO)
+    {
+      dynamic = 0;
+      if ((ret = tdep_find_proc_info (c, ip, 1)) < 0)
+        return ret;
+    }
+
+  if (c->pi.format != UNW_INFO_FORMAT_DYNAMIC
+      && c->pi.format != UNW_INFO_FORMAT_TABLE
+      && c->pi.format != UNW_INFO_FORMAT_REMOTE_TABLE)
+    return -UNW_ENOINFO;
+
+  c->pi_valid = 1;
+  c->pi_is_dynamic = dynamic;
+
+  /* Let system/machine-dependent code determine frame-specific attributes. */
+  if (ret >= 0)
+    tdep_fetch_frame (c, ip, 1);
+
+  return ret;
+}
+
+static int
+parse_dynamic (struct dwarf_cursor *c, unw_word_t ip, dwarf_state_record_t *sr)
+{
+  Debug (1, "Not yet implemented\n");
+  return -UNW_ENOINFO;
+}
+
+static inline void
+put_unwind_info (struct dwarf_cursor *c, unw_proc_info_t *pi)
+{
+  if (c->pi_is_dynamic)
+    unwi_put_dynamic_unwind_info (c->as, pi, c->as_arg);
+  else if (pi->unwind_info && pi->format == UNW_INFO_FORMAT_TABLE)
+    {
+      mempool_free (&dwarf_cie_info_pool, pi->unwind_info);
+      pi->unwind_info = NULL;
+    }
+  c->pi_valid = 0;
+}
+
+static inline int
+setup_fde (struct dwarf_cursor *c, dwarf_state_record_t *sr)
+{
+  int i, ret;
+
+  assert (c->pi_valid);
+
+  memset (sr, 0, sizeof (*sr));
+  for (i = 0; i < DWARF_NUM_PRESERVED_REGS + 2; ++i)
+    set_reg (sr, i, DWARF_WHERE_SAME, 0);
+
+  struct dwarf_cie_info *dci = c->pi.unwind_info;
+  sr->rs_current.ret_addr_column  = dci->ret_addr_column;
+  unw_word_t addr = dci->cie_instr_start;
+  unw_word_t curr_ip = 0;
+  dwarf_stackable_reg_state_t *rs_stack = NULL;
+  ret = run_cfi_program (c, sr, &curr_ip, ~(unw_word_t) 0, &addr,
+			 dci->cie_instr_end,
+			 &rs_stack, dci);
+  empty_rstate_stack(&rs_stack);
+  if (ret < 0)
+    return ret;
+
+  memcpy (&sr->rs_initial, &sr->rs_current, sizeof (sr->rs_initial));
+  return 0;
+}
+
+static inline int
+parse_fde (struct dwarf_cursor *c, unw_word_t ip, dwarf_state_record_t *sr)
+{
+  int ret;
+  struct dwarf_cie_info *dci = c->pi.unwind_info;
+  unw_word_t addr = dci->fde_instr_start;
+  unw_word_t curr_ip = c->pi.start_ip;
+  dwarf_stackable_reg_state_t *rs_stack = NULL;
+  /* Process up to current `ip` for signal frame and `ip - 1` for normal call frame
+     See `c->use_prev_instr` use in `fetch_proc_info` for details. */
+  ret = run_cfi_program (c, sr, &curr_ip, ip - c->use_prev_instr, &addr, dci->fde_instr_end,
+			 &rs_stack, dci);
+  empty_rstate_stack(&rs_stack);
+  if (ret < 0)
+    return ret;
+
+  return 0;
+}
+
+HIDDEN int
+dwarf_flush_rs_cache (struct dwarf_rs_cache *cache)
+{
+  int i;
+
+  if (cache->log_size == DWARF_DEFAULT_LOG_UNW_CACHE_SIZE
+      || !cache->hash) {
+    cache->hash = cache->default_hash;
+    cache->buckets = cache->default_buckets;
+    cache->links = cache->default_links;
+    cache->log_size = DWARF_DEFAULT_LOG_UNW_CACHE_SIZE;
+  } else {
+    if (cache->hash && cache->hash != cache->default_hash)
+      munmap(cache->hash, DWARF_UNW_HASH_SIZE(cache->prev_log_size)
+                           * sizeof (cache->hash[0]));
+    if (cache->buckets && cache->buckets != cache->default_buckets)
+      munmap(cache->buckets, DWARF_UNW_CACHE_SIZE(cache->prev_log_size)
+	                      * sizeof (cache->buckets[0]));
+    if (cache->links && cache->links != cache->default_links)
+      munmap(cache->links, DWARF_UNW_CACHE_SIZE(cache->prev_log_size)
+	                      * sizeof (cache->links[0]));
+    GET_MEMORY(cache->hash, DWARF_UNW_HASH_SIZE(cache->log_size)
+                             * sizeof (cache->hash[0]));
+    GET_MEMORY(cache->buckets, DWARF_UNW_CACHE_SIZE(cache->log_size)
+                                * sizeof (cache->buckets[0]));
+    GET_MEMORY(cache->links, DWARF_UNW_CACHE_SIZE(cache->log_size)
+                                * sizeof (cache->links[0]));
+    if (!cache->hash || !cache->buckets || !cache->links)
+      {
+        Debug (1, "Unable to allocate cache memory");
+        return -UNW_ENOMEM;
+      }
+    cache->prev_log_size = cache->log_size;
+  }
+
+  cache->rr_head = 0;
+
+  for (i = 0; i < DWARF_UNW_CACHE_SIZE(cache->log_size); ++i)
+    {
+      cache->links[i].coll_chain = -1;
+      cache->links[i].ip = 0;
+      cache->links[i].valid = 0;
+    }
+  for (i = 0; i< DWARF_UNW_HASH_SIZE(cache->log_size); ++i)
+    cache->hash[i] = -1;
+
+  return 0;
+}
+
+static inline struct dwarf_rs_cache *
+get_rs_cache (unw_addr_space_t as, intrmask_t *saved_maskp)
+{
+  struct dwarf_rs_cache *cache = &as->global_cache;
+  unw_caching_policy_t caching = as->caching_policy;
+
+  if (caching == UNW_CACHE_NONE)
+    return NULL;
+
+#if defined(HAVE___THREAD) && HAVE___THREAD
+  if (likely (caching == UNW_CACHE_PER_THREAD))
+    {
+      static __thread struct dwarf_rs_cache tls_cache __attribute__((tls_model("initial-exec")));
+      Debug (16, "using TLS cache\n");
+      cache = &tls_cache;
+    }
+  else
+#else
+  if (likely (caching == UNW_CACHE_GLOBAL))
+#endif
+    {
+      Debug (16, "acquiring lock\n");
+      lock_acquire (&cache->lock, *saved_maskp);
+    }
+
+  if ((atomic_read (&as->cache_generation) != atomic_read (&cache->generation))
+       || !cache->hash)
+    {
+      /* cache_size is only set in the global_cache, copy it over before flushing */
+      cache->log_size = as->global_cache.log_size;
+      if (dwarf_flush_rs_cache (cache) < 0)
+        return NULL;
+      cache->generation = as->cache_generation;
+    }
+
+  return cache;
+}
+
+static inline void
+put_rs_cache (unw_addr_space_t as, struct dwarf_rs_cache *cache,
+                  intrmask_t *saved_maskp)
+{
+  assert (as->caching_policy != UNW_CACHE_NONE);
+
+  Debug (16, "unmasking signals/interrupts and releasing lock\n");
+  if (likely (as->caching_policy == UNW_CACHE_GLOBAL))
+    lock_release (&cache->lock, *saved_maskp);
+}
+
+static inline unw_hash_index_t CONST_ATTR
+hash (unw_word_t ip, unsigned short log_size)
+{
+  /* based on (sqrt(5)/2-1)*2^64 */
+# define magic  ((unw_word_t) 0x9e3779b97f4a7c16ULL)
+
+  return ip * magic >> ((sizeof(unw_word_t) * 8) - (log_size + 1));
+}
+
+static inline long
+cache_match (struct dwarf_rs_cache *cache, unsigned short index, unw_word_t ip)
+{
+  return (cache->links[index].valid && (ip == cache->links[index].ip));
+}
+
+static dwarf_reg_state_t *
+rs_lookup (struct dwarf_rs_cache *cache, struct dwarf_cursor *c)
+{
+  unsigned short index;
+  unw_word_t ip = c->ip;
+
+  if (c->hint > 0)
+    {
+      index = c->hint - 1;
+      if (cache_match (cache, index, ip))
+	return &cache->buckets[index];
+    }
+
+  for (index = cache->hash[hash (ip, cache->log_size)];
+       index < DWARF_UNW_CACHE_SIZE(cache->log_size);
+       index = cache->links[index].coll_chain)
+    {
+      if (cache_match (cache, index, ip))
+	return &cache->buckets[index];
+    }
+  return NULL;
+}
+
+static inline dwarf_reg_state_t *
+rs_new (struct dwarf_rs_cache *cache, struct dwarf_cursor * c)
+{
+  unw_hash_index_t index;
+  unsigned short head;
+
+  head = cache->rr_head;
+  cache->rr_head = (head + 1) & (DWARF_UNW_CACHE_SIZE(cache->log_size) - 1);
+
+  /* remove the old rs from the hash table (if it's there): */
+  if (cache->links[head].ip)
+    {
+      unsigned short *pindex;
+      for (pindex = &cache->hash[hash (cache->links[head].ip, cache->log_size)];
+	   *pindex < DWARF_UNW_CACHE_SIZE(cache->log_size);
+	   pindex = &cache->links[*pindex].coll_chain)
+	{
+	  if (*pindex == head)
+	    {
+	      *pindex = cache->links[*pindex].coll_chain;
+	      break;
+	    }
+	}
+    }
+
+  /* enter new rs in the hash table */
+  index = hash (c->ip, cache->log_size);
+  cache->links[head].coll_chain = cache->hash[index];
+  cache->hash[index] = head;
+
+  cache->links[head].ip = c->ip;
+  cache->links[head].valid = 1;
+  cache->links[head].signal_frame = tdep_cache_frame(c);
+  return cache->buckets + head;
+}
+
+static int
+create_state_record_for (struct dwarf_cursor *c, dwarf_state_record_t *sr,
+                         unw_word_t ip)
+{
+  int ret;
+  switch (c->pi.format)
+    {
+    case UNW_INFO_FORMAT_TABLE:
+    case UNW_INFO_FORMAT_REMOTE_TABLE:
+      if ((ret = setup_fde(c, sr)) < 0)
+	return ret;
+      ret = parse_fde (c, ip, sr);
+      break;
+
+    case UNW_INFO_FORMAT_DYNAMIC:
+      ret = parse_dynamic (c, ip, sr);
+      break;
+
+    default:
+      Debug (1, "Unexpected unwind-info format %d\n", c->pi.format);
+      ret = -UNW_EINVAL;
+    }
+  return ret;
+}
+
+static inline int
+eval_location_expr (struct dwarf_cursor *c, unw_word_t stack_val, unw_addr_space_t as,
+                    unw_accessors_t *a, unw_word_t addr,
+                    dwarf_loc_t *locp, void *arg)
+{
+  int ret, is_register;
+  unw_word_t len, val;
+
+  /* read the length of the expression: */
+  if ((ret = dwarf_read_uleb128 (as, a, &addr, &len, arg)) < 0)
+    return ret;
+
+  /* evaluate the expression: */
+  if ((ret = dwarf_eval_expr (c, stack_val, &addr, len, &val, &is_register)) < 0)
+    return ret;
+
+  if (is_register)
+    *locp = DWARF_REG_LOC (c, dwarf_to_unw_regnum (val));
+  else
+    *locp = DWARF_MEM_LOC (c, val);
+
+  return 0;
+}
+
+static int
+apply_reg_state (struct dwarf_cursor *c, struct dwarf_reg_state *rs)
+{
+  unw_word_t regnum, addr, cfa, ip;
+  unw_word_t prev_ip, prev_cfa;
+  unw_addr_space_t as;
+  dwarf_loc_t cfa_loc;
+  unw_accessors_t *a;
+  int i, ret;
+  void *arg;
+
+  prev_ip = c->ip;
+  prev_cfa = c->cfa;
+
+  as = c->as;
+  arg = c->as_arg;
+  a = unw_get_accessors_int (as);
+
+  /* Evaluate the CFA first, because it may be referred to by other
+     expressions.  */
+
+  if (rs->reg.where[DWARF_CFA_REG_COLUMN] == DWARF_WHERE_REG)
+    {
+      /* CFA is equal to [reg] + offset: */
+
+      /* As a special-case, if the stack-pointer is the CFA and the
+         stack-pointer wasn't saved, popping the CFA implicitly pops
+         the stack-pointer as well.  */
+      if ((rs->reg.val[DWARF_CFA_REG_COLUMN] == UNW_TDEP_SP)
+          && (UNW_TDEP_SP < ARRAY_SIZE(rs->reg.val))
+          && (rs->reg.where[UNW_TDEP_SP] == DWARF_WHERE_SAME))
+          cfa = c->cfa;
+      else
+        {
+          regnum = dwarf_to_unw_regnum (rs->reg.val[DWARF_CFA_REG_COLUMN]);
+          if ((ret = unw_get_reg ((unw_cursor_t *) c, regnum, &cfa)) < 0)
+            return ret;
+        }
+      cfa += rs->reg.val[DWARF_CFA_OFF_COLUMN];
+    }
+  else
+    {
+      /* CFA is equal to EXPR: */
+
+      assert (rs->reg.where[DWARF_CFA_REG_COLUMN] == DWARF_WHERE_EXPR);
+
+      addr = rs->reg.val[DWARF_CFA_REG_COLUMN];
+      /* The dwarf standard doesn't specify an initial value to be pushed on */
+      /* the stack before DW_CFA_def_cfa_expression evaluation. We push on a */
+      /* dummy value (0) to keep the eval_location_expr function consistent. */
+      if ((ret = eval_location_expr (c, 0, as, a, addr, &cfa_loc, arg)) < 0)
+        return ret;
+      /* the returned location better be a memory location... */
+      if (DWARF_IS_REG_LOC (cfa_loc))
+        return -UNW_EBADFRAME;
+      cfa = DWARF_GET_LOC (cfa_loc);
+    }
+
+  dwarf_loc_t new_loc[DWARF_NUM_PRESERVED_REGS];
+  memcpy(new_loc, c->loc, sizeof(new_loc));
+
+  for (i = 0; i < DWARF_NUM_PRESERVED_REGS; ++i)
+    {
+      switch ((dwarf_where_t) rs->reg.where[i])
+        {
+        case DWARF_WHERE_UNDEF:
+          new_loc[i] = DWARF_NULL_LOC;
+          break;
+
+        case DWARF_WHERE_SAME:
+          break;
+
+        case DWARF_WHERE_CFAREL:
+          new_loc[i] = DWARF_MEM_LOC (c, cfa + rs->reg.val[i]);
+          break;
+
+        case DWARF_WHERE_REG:
+#ifdef __s390x__
+          /* GPRs can be saved in FPRs on s390x */
+          if (unw_is_fpreg (dwarf_to_unw_regnum (rs->reg.val[i])))
+            {
+              new_loc[i] = DWARF_FPREG_LOC (c, dwarf_to_unw_regnum (rs->reg.val[i]));
+              break;
+            }
+#endif
+          new_loc[i] = new_loc[rs->reg.val[i]];
+          break;
+
+        case DWARF_WHERE_EXPR:
+          addr = rs->reg.val[i];
+          /* The dwarf standard requires the current CFA to be pushed on the */
+          /* stack before DW_CFA_expression evaluation. */
+          if ((ret = eval_location_expr (c, cfa, as, a, addr, new_loc + i, arg)) < 0)
+            return ret;
+          break;
+
+        case DWARF_WHERE_VAL_EXPR:
+          addr = rs->reg.val[i];
+          /* The dwarf standard requires the current CFA to be pushed on the */
+          /* stack before DW_CFA_val_expression evaluation. */
+          if ((ret = eval_location_expr (c, cfa, as, a, addr, new_loc + i, arg)) < 0)
+            return ret;
+          new_loc[i] = DWARF_VAL_LOC (c, DWARF_GET_LOC (new_loc[i]));
+          break;
+        }
+    }
+
+  memcpy(c->loc, new_loc, sizeof(new_loc));
+
+  c->cfa = cfa;
+  /* DWARF spec says undefined return address location means end of stack. */
+  if (DWARF_IS_NULL_LOC (c->loc[rs->ret_addr_column]))
+    {
+      c->ip = 0;
+      ret = 0;
+    }
+  else
+  {
+    ret = dwarf_get (c, c->loc[rs->ret_addr_column], &ip);
+    if (ret < 0)
+      return ret;
+    c->ip = ip;
+    ret = 1;
+  }
+
+  /* XXX: check for ip to be code_aligned */
+  if (c->ip == prev_ip && c->cfa == prev_cfa)
+    {
+      Dprintf ("%s: ip and cfa unchanged; stopping here (ip=0x%lx)\n",
+               __FUNCTION__, (long) c->ip);
+      return -UNW_EBADFRAME;
+    }
+
+  if (c->stash_frames)
+    tdep_stash_frame (c, rs);
+
+  return ret;
+}
+
+/* Find the saved locations. */
+static int
+find_reg_state (struct dwarf_cursor *c, dwarf_state_record_t *sr)
+{
+  dwarf_reg_state_t *rs;
+  struct dwarf_rs_cache *cache;
+  int ret = 0;
+  intrmask_t saved_mask;
+
+  if ((cache = get_rs_cache(c->as, &saved_mask)) &&
+      (rs = rs_lookup(cache, c)))
+    {
+      /* update hint; no locking needed: single-word writes are atomic */
+      unsigned short index = rs - cache->buckets;
+      c->use_prev_instr = ! cache->links[index].signal_frame;
+      memcpy (&sr->rs_current, rs, sizeof (*rs));
+    }
+  else
+    {
+      ret = fetch_proc_info (c, c->ip);
+      int next_use_prev_instr = c->use_prev_instr;
+      if (ret >= 0)
+	{
+	  /* Update use_prev_instr for the next frame. */
+	  assert(c->pi.unwind_info);
+	  struct dwarf_cie_info *dci = c->pi.unwind_info;
+	  next_use_prev_instr = ! dci->signal_frame;
+	  ret = create_state_record_for (c, sr, c->ip);
+	}
+      put_unwind_info (c, &c->pi);
+      c->use_prev_instr = next_use_prev_instr;
+
+      if (cache && ret >= 0)
+	{
+	  rs = rs_new (cache, c);
+	  cache->links[rs - cache->buckets].hint = 0;
+	  memcpy(rs, &sr->rs_current, sizeof(*rs));
+	}
+    }
+
+  unsigned short index = -1;
+  if (cache)
+    {
+      if (rs)
+	{
+	  index = rs - cache->buckets;
+	  c->hint = cache->links[index].hint;
+	  cache->links[c->prev_rs].hint = index + 1;
+	  c->prev_rs = index;
+	}
+      put_rs_cache (c->as, cache, &saved_mask);
+    }
+  if (ret < 0)
+      return ret;
+  if (cache)
+    tdep_reuse_frame (c, cache->links[index].signal_frame);
+  return 0;
+}
+
+/* The function finds the saved locations and applies the register
+   state as well. */
+HIDDEN int
+dwarf_step (struct dwarf_cursor *c)
+{
+  int ret;
+  dwarf_state_record_t sr;
+  if ((ret = find_reg_state (c, &sr)) < 0)
+    return ret;
+  return apply_reg_state (c, &sr.rs_current);
+}
+
+HIDDEN int
+dwarf_make_proc_info (struct dwarf_cursor *c)
+{
+#if 0
+  if (c->as->caching_policy == UNW_CACHE_NONE
+      || get_cached_proc_info (c) < 0)
+#endif
+  /* Need to check if current frame contains
+     args_size, and set cursor appropriately.  Only
+     needed for unw_resume */
+  dwarf_state_record_t sr;
+  int ret;
+
+  /* Lookup it up the slow way... */
+  ret = fetch_proc_info (c, c->ip);
+  if (ret >= 0)
+      ret = create_state_record_for (c, &sr, c->ip);
+  put_unwind_info (c, &c->pi);
+  if (ret < 0)
+    return ret;
+  c->args_size = sr.args_size;
+
+  return 0;
+}
+
+static int
+dwarf_reg_states_dynamic_iterate(struct dwarf_cursor *c,
+				 unw_reg_states_callback cb,
+				 void *token)
+{
+  Debug (1, "Not yet implemented\n");
+  return -UNW_ENOINFO;
+}
+
+static int
+dwarf_reg_states_table_iterate(struct dwarf_cursor *c,
+			       unw_reg_states_callback cb,
+			       void *token)
+{
+  dwarf_state_record_t sr;
+  int ret = setup_fde(c, &sr);
+  struct dwarf_cie_info *dci = c->pi.unwind_info;
+  unw_word_t addr = dci->fde_instr_start;
+  unw_word_t curr_ip = c->pi.start_ip;
+  dwarf_stackable_reg_state_t *rs_stack = NULL;
+  while (ret >= 0 && curr_ip < c->pi.end_ip && addr < dci->fde_instr_end)
+    {
+      unw_word_t prev_ip = curr_ip;
+      ret = run_cfi_program (c, &sr, &curr_ip, prev_ip, &addr, dci->fde_instr_end,
+			     &rs_stack, dci);
+      if (ret >= 0 && prev_ip < curr_ip)
+	ret = cb(token, &sr.rs_current, sizeof(sr.rs_current), prev_ip, curr_ip);
+    }
+  empty_rstate_stack(&rs_stack);
+#if defined(NEED_LAST_IP)
+  if (ret >= 0 && curr_ip < c->pi.last_ip)
+    /* report the dead zone after the procedure ends */
+    ret = cb(token, &sr.rs_current, sizeof(sr.rs_current), curr_ip, c->pi.last_ip);
+#else
+  if (ret >= 0 && curr_ip < c->pi.end_ip)
+    /* report for whatever is left before procedure end */
+    ret = cb(token, &sr.rs_current, sizeof(sr.rs_current), curr_ip, c->pi.end_ip);
+#endif
+  return ret;
+}
+
+HIDDEN int
+dwarf_reg_states_iterate(struct dwarf_cursor *c,
+			 unw_reg_states_callback cb,
+			 void *token)
+{
+  int ret = fetch_proc_info (c, c->ip);
+  int next_use_prev_instr = c->use_prev_instr;
+  if (ret >= 0)
+    {
+      /* Update use_prev_instr for the next frame. */
+      assert(c->pi.unwind_info);
+      struct dwarf_cie_info *dci = c->pi.unwind_info;
+      next_use_prev_instr = ! dci->signal_frame;
+      switch (c->pi.format)
+	{
+	case UNW_INFO_FORMAT_TABLE:
+	case UNW_INFO_FORMAT_REMOTE_TABLE:
+	  ret = dwarf_reg_states_table_iterate(c, cb, token);
+	  break;
+
+	case UNW_INFO_FORMAT_DYNAMIC:
+	  ret = dwarf_reg_states_dynamic_iterate (c, cb, token);
+	  break;
+
+	default:
+	  Debug (1, "Unexpected unwind-info format %d\n", c->pi.format);
+	  ret = -UNW_EINVAL;
+	}
+    }
+  put_unwind_info (c, &c->pi);
+  c->use_prev_instr = next_use_prev_instr;
+  return ret;
+}
+
+HIDDEN int
+dwarf_apply_reg_state (struct dwarf_cursor *c, struct dwarf_reg_state *rs)
+{
+  return apply_reg_state(c, rs);
+}
diff --git a/src/third_party/unwind/dist/src/dwarf/Gpe.c b/src/third_party/unwind/dist/src/dwarf/Gpe.c
new file mode 100644
index 00000000000..a0e37ba2329
--- /dev/null
+++ b/src/third_party/unwind/dist/src/dwarf/Gpe.c
@@ -0,0 +1,39 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2003, 2005 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "dwarf_i.h"
+#include "libunwind_i.h"
+
+#include <assert.h>
+
+HIDDEN int
+dwarf_read_encoded_pointer (unw_addr_space_t as, unw_accessors_t *a,
+                            unw_word_t *addr, unsigned char encoding,
+                            const unw_proc_info_t *pi,
+                            unw_word_t *valp, void *arg)
+{
+  return dwarf_read_encoded_pointer_inlined (as, a, addr, encoding,
+                                             pi, valp, arg);
+}
diff --git a/src/third_party/unwind/dist/src/dwarf/Lexpr.c b/src/third_party/unwind/dist/src/dwarf/Lexpr.c
new file mode 100644
index 00000000000..245970c9e3f
--- /dev/null
+++ b/src/third_party/unwind/dist/src/dwarf/Lexpr.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gexpr.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/dwarf/Lfde.c b/src/third_party/unwind/dist/src/dwarf/Lfde.c
new file mode 100644
index 00000000000..e779e8f192e
--- /dev/null
+++ b/src/third_party/unwind/dist/src/dwarf/Lfde.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gfde.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/dwarf/Lfind_proc_info-lsb.c b/src/third_party/unwind/dist/src/dwarf/Lfind_proc_info-lsb.c
new file mode 100644
index 00000000000..27a5eeac188
--- /dev/null
+++ b/src/third_party/unwind/dist/src/dwarf/Lfind_proc_info-lsb.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gfind_proc_info-lsb.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/dwarf/Lfind_unwind_table.c b/src/third_party/unwind/dist/src/dwarf/Lfind_unwind_table.c
new file mode 100644
index 00000000000..68e269f1d7f
--- /dev/null
+++ b/src/third_party/unwind/dist/src/dwarf/Lfind_unwind_table.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gfind_unwind_table.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/dwarf/Lparser.c b/src/third_party/unwind/dist/src/dwarf/Lparser.c
new file mode 100644
index 00000000000..f23aaf48e9c
--- /dev/null
+++ b/src/third_party/unwind/dist/src/dwarf/Lparser.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gparser.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/dwarf/Lpe.c b/src/third_party/unwind/dist/src/dwarf/Lpe.c
new file mode 100644
index 00000000000..a672358f063
--- /dev/null
+++ b/src/third_party/unwind/dist/src/dwarf/Lpe.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gpe.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/dwarf/global.c b/src/third_party/unwind/dist/src/dwarf/global.c
new file mode 100644
index 00000000000..70985071425
--- /dev/null
+++ b/src/third_party/unwind/dist/src/dwarf/global.c
@@ -0,0 +1,37 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2003-2004 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "dwarf_i.h"
+
+HIDDEN struct mempool dwarf_reg_state_pool;
+HIDDEN struct mempool dwarf_cie_info_pool;
+
+HIDDEN int
+dwarf_init (void)
+{
+  mempool_init (&dwarf_reg_state_pool, sizeof (dwarf_stackable_reg_state_t), 0);
+  mempool_init (&dwarf_cie_info_pool, sizeof (struct dwarf_cie_info), 0);
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/elf32.c b/src/third_party/unwind/dist/src/elf32.c
new file mode 100644
index 00000000000..a70bb58f24d
--- /dev/null
+++ b/src/third_party/unwind/dist/src/elf32.c
@@ -0,0 +1,4 @@
+#ifndef UNW_REMOTE_ONLY
+# include "elf32.h"
+# include "elfxx.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/elf32.h b/src/third_party/unwind/dist/src/elf32.h
new file mode 100644
index 00000000000..2c7bca4c9dc
--- /dev/null
+++ b/src/third_party/unwind/dist/src/elf32.h
@@ -0,0 +1,9 @@
+#ifndef elf32_h
+#define elf32_h
+
+#ifndef ELF_CLASS
+#define ELF_CLASS       ELFCLASS32
+#endif
+#include "elfxx.h"
+
+#endif /* elf32_h */
diff --git a/src/third_party/unwind/dist/src/elf64.c b/src/third_party/unwind/dist/src/elf64.c
new file mode 100644
index 00000000000..195b8879486
--- /dev/null
+++ b/src/third_party/unwind/dist/src/elf64.c
@@ -0,0 +1,4 @@
+#ifndef UNW_REMOTE_ONLY
+# include "elf64.h"
+# include "elfxx.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/elf64.h b/src/third_party/unwind/dist/src/elf64.h
new file mode 100644
index 00000000000..091fba8e1f8
--- /dev/null
+++ b/src/third_party/unwind/dist/src/elf64.h
@@ -0,0 +1,9 @@
+#ifndef elf64_h
+#define elf64_h
+
+#ifndef ELF_CLASS
+#define ELF_CLASS       ELFCLASS64
+#endif
+#include "elfxx.h"
+
+#endif /* elf64_h */
diff --git a/src/third_party/unwind/dist/src/elfxx.c b/src/third_party/unwind/dist/src/elfxx.c
new file mode 100644
index 00000000000..b03dfcb734c
--- /dev/null
+++ b/src/third_party/unwind/dist/src/elfxx.c
@@ -0,0 +1,481 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2005 Hewlett-Packard Co
+   Copyright (C) 2007 David Mosberger-Tang
+        Contributed by David Mosberger-Tang <dmosberger@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "libunwind_i.h"
+
+#include <stdio.h>
+#include <sys/param.h>
+
+#ifdef HAVE_LZMA
+#include <lzma.h>
+#endif /* HAVE_LZMA */
+
+static Elf_W (Shdr)*
+elf_w (section_table) (struct elf_image *ei)
+{
+  Elf_W (Ehdr) *ehdr = ei->image;
+  Elf_W (Off) soff;
+
+  soff = ehdr->e_shoff;
+  if (soff + ehdr->e_shnum * ehdr->e_shentsize > ei->size)
+    {
+      Debug (1, "section table outside of image? (%lu > %lu)\n",
+             (unsigned long) (soff + ehdr->e_shnum * ehdr->e_shentsize),
+             (unsigned long) ei->size);
+      return NULL;
+    }
+
+  return (Elf_W (Shdr) *) ((char *) ei->image + soff);
+}
+
+static char*
+elf_w (string_table) (struct elf_image *ei, int section)
+{
+  Elf_W (Ehdr) *ehdr = ei->image;
+  Elf_W (Off) soff, str_soff;
+  Elf_W (Shdr) *str_shdr;
+
+  /* this offset is assumed to be OK */
+  soff = ehdr->e_shoff;
+
+  str_soff = soff + (section * ehdr->e_shentsize);
+  if (str_soff + ehdr->e_shentsize > ei->size)
+    {
+      Debug (1, "string shdr table outside of image? (%lu > %lu)\n",
+             (unsigned long) (str_soff + ehdr->e_shentsize),
+             (unsigned long) ei->size);
+      return NULL;
+    }
+  str_shdr = (Elf_W (Shdr) *) ((char *) ei->image + str_soff);
+
+  if (str_shdr->sh_offset + str_shdr->sh_size > ei->size)
+    {
+      Debug (1, "string table outside of image? (%lu > %lu)\n",
+             (unsigned long) (str_shdr->sh_offset + str_shdr->sh_size),
+             (unsigned long) ei->size);
+      return NULL;
+    }
+
+  Debug (16, "strtab=0x%lx\n", (long) str_shdr->sh_offset);
+  return ei->image + str_shdr->sh_offset;
+}
+
+static int
+elf_w (lookup_symbol) (unw_addr_space_t as,
+                       unw_word_t ip, struct elf_image *ei,
+                       Elf_W (Addr) load_offset,
+                       char *buf, size_t buf_len, Elf_W (Addr) *min_dist)
+{
+  size_t syment_size;
+  Elf_W (Ehdr) *ehdr = ei->image;
+  Elf_W (Sym) *sym, *symtab, *symtab_end;
+  Elf_W (Shdr) *shdr;
+  Elf_W (Addr) val;
+  int i, ret = -UNW_ENOINFO;
+  char *strtab;
+
+  if (!elf_w (valid_object) (ei))
+    return -UNW_ENOINFO;
+
+  shdr = elf_w (section_table) (ei);
+  if (!shdr)
+    return -UNW_ENOINFO;
+
+  for (i = 0; i < ehdr->e_shnum; ++i)
+    {
+      switch (shdr->sh_type)
+        {
+        case SHT_SYMTAB:
+        case SHT_DYNSYM:
+          symtab = (Elf_W (Sym) *) ((char *) ei->image + shdr->sh_offset);
+          symtab_end = (Elf_W (Sym) *) ((char *) symtab + shdr->sh_size);
+          syment_size = shdr->sh_entsize;
+
+          strtab = elf_w (string_table) (ei, shdr->sh_link);
+          if (!strtab)
+            break;
+
+          Debug (16, "symtab=0x%lx[%d]\n",
+                 (long) shdr->sh_offset, shdr->sh_type);
+
+          for (sym = symtab;
+               sym < symtab_end;
+               sym = (Elf_W (Sym) *) ((char *) sym + syment_size))
+            {
+              if (ELF_W (ST_TYPE) (sym->st_info) == STT_FUNC
+                  && sym->st_shndx != SHN_UNDEF)
+                {
+                  val = sym->st_value;
+                  if (sym->st_shndx != SHN_ABS)
+                    val += load_offset;
+                  if (tdep_get_func_addr (as, val, &val) < 0)
+                    continue;
+                  Debug (16, "0x%016lx info=0x%02x %s\n",
+                         (long) val, sym->st_info, strtab + sym->st_name);
+
+                  if ((Elf_W (Addr)) (ip - val) < *min_dist)
+                    {
+                      *min_dist = (Elf_W (Addr)) (ip - val);
+                      strncpy (buf, strtab + sym->st_name, buf_len);
+                      buf[buf_len - 1] = '\0';
+                      ret = (strlen (strtab + sym->st_name) >= buf_len
+                             ? -UNW_ENOMEM : 0);
+                    }
+                }
+            }
+          break;
+
+        default:
+          break;
+        }
+      shdr = (Elf_W (Shdr) *) (((char *) shdr) + ehdr->e_shentsize);
+    }
+  return ret;
+}
+
+static Elf_W (Addr)
+elf_w (get_load_offset) (struct elf_image *ei, unsigned long segbase,
+                         unsigned long mapoff)
+{
+  Elf_W (Addr) offset = 0;
+  Elf_W (Ehdr) *ehdr;
+  Elf_W (Phdr) *phdr;
+  int i;
+
+  ehdr = ei->image;
+  phdr = (Elf_W (Phdr) *) ((char *) ei->image + ehdr->e_phoff);
+
+  for (i = 0; i < ehdr->e_phnum; ++i)
+    if (phdr[i].p_type == PT_LOAD && phdr[i].p_offset == mapoff)
+      {
+        offset = segbase - phdr[i].p_vaddr;
+        break;
+      }
+
+  return offset;
+}
+
+#if HAVE_LZMA
+static size_t
+xz_uncompressed_size (uint8_t *compressed, size_t length)
+{
+  uint64_t memlimit = UINT64_MAX;
+  size_t ret = 0, pos = 0;
+  lzma_stream_flags options;
+  lzma_index *index;
+
+  if (length < LZMA_STREAM_HEADER_SIZE)
+    return 0;
+
+  uint8_t *footer = compressed + length - LZMA_STREAM_HEADER_SIZE;
+  if (lzma_stream_footer_decode (&options, footer) != LZMA_OK)
+    return 0;
+
+  if (length < LZMA_STREAM_HEADER_SIZE + options.backward_size)
+    return 0;
+
+  uint8_t *indexdata = footer - options.backward_size;
+  if (lzma_index_buffer_decode (&index, &memlimit, NULL, indexdata,
+                                &pos, options.backward_size) != LZMA_OK)
+    return 0;
+
+  if (lzma_index_size (index) == options.backward_size)
+    {
+      ret = lzma_index_uncompressed_size (index);
+    }
+
+  lzma_index_end (index, NULL);
+  return ret;
+}
+
+static int
+elf_w (extract_minidebuginfo) (struct elf_image *ei, struct elf_image *mdi)
+{
+  Elf_W (Shdr) *shdr;
+  uint8_t *compressed = NULL;
+  uint64_t memlimit = UINT64_MAX; /* no memory limit */
+  size_t compressed_len, uncompressed_len;
+
+  shdr = elf_w (find_section) (ei, ".gnu_debugdata");
+  if (!shdr)
+    return 0;
+
+  compressed = ((uint8_t *) ei->image) + shdr->sh_offset;
+  compressed_len = shdr->sh_size;
+
+  uncompressed_len = xz_uncompressed_size (compressed, compressed_len);
+  if (uncompressed_len == 0)
+    {
+      Debug (1, "invalid .gnu_debugdata contents\n");
+      return 0;
+    }
+
+  mdi->size = uncompressed_len;
+  mdi->image = mmap (NULL, uncompressed_len, PROT_READ|PROT_WRITE,
+                     MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
+
+  if (mdi->image == MAP_FAILED)
+    return 0;
+
+  size_t in_pos = 0, out_pos = 0;
+  lzma_ret lret;
+  lret = lzma_stream_buffer_decode (&memlimit, 0, NULL,
+                                    compressed, &in_pos, compressed_len,
+                                    mdi->image, &out_pos, mdi->size);
+  if (lret != LZMA_OK)
+    {
+      Debug (1, "LZMA decompression failed: %d\n", lret);
+      munmap (mdi->image, mdi->size);
+      return 0;
+    }
+
+  return 1;
+}
+#else
+static int
+elf_w (extract_minidebuginfo) (struct elf_image *ei, struct elf_image *mdi)
+{
+  return 0;
+}
+#endif /* !HAVE_LZMA */
+
+/* Find the ELF image that contains IP and return the "closest"
+   procedure name, if there is one.  With some caching, this could be
+   sped up greatly, but until an application materializes that's
+   sensitive to the performance of this routine, why bother...  */
+
+HIDDEN int
+elf_w (get_proc_name_in_image) (unw_addr_space_t as, struct elf_image *ei,
+                       unsigned long segbase,
+                       unsigned long mapoff,
+                       unw_word_t ip,
+                       char *buf, size_t buf_len, unw_word_t *offp)
+{
+  Elf_W (Addr) load_offset;
+  Elf_W (Addr) min_dist = ~(Elf_W (Addr))0;
+  int ret;
+
+  load_offset = elf_w (get_load_offset) (ei, segbase, mapoff);
+  ret = elf_w (lookup_symbol) (as, ip, ei, load_offset, buf, buf_len, &min_dist);
+
+  /* If the ELF image has MiniDebugInfo embedded in it, look up the symbol in
+     there as well and replace the previously found if it is closer. */
+  struct elf_image mdi;
+  if (elf_w (extract_minidebuginfo) (ei, &mdi))
+    {
+      int ret_mdi = elf_w (lookup_symbol) (as, ip, &mdi, load_offset, buf,
+                                           buf_len, &min_dist);
+
+      /* Closer symbol was found (possibly truncated). */
+      if (ret_mdi == 0 || ret_mdi == -UNW_ENOMEM)
+        {
+          ret = ret_mdi;
+        }
+
+      munmap (mdi.image, mdi.size);
+    }
+
+  if (min_dist >= ei->size)
+    return -UNW_ENOINFO;                /* not found */
+  if (offp)
+    *offp = min_dist;
+  return ret;
+}
+
+HIDDEN int
+elf_w (get_proc_name) (unw_addr_space_t as, pid_t pid, unw_word_t ip,
+                       char *buf, size_t buf_len, unw_word_t *offp)
+{
+  unsigned long segbase, mapoff;
+  struct elf_image ei;
+  int ret;
+  char file[PATH_MAX];
+
+  ret = tdep_get_elf_image (&ei, pid, ip, &segbase, &mapoff, file, PATH_MAX);
+  if (ret < 0)
+    return ret;
+
+  ret = elf_w (load_debuglink) (file, &ei, 1);
+  if (ret < 0)
+    return ret;
+
+  ret = elf_w (get_proc_name_in_image) (as, &ei, segbase, mapoff, ip, buf, buf_len, offp);
+
+  munmap (ei.image, ei.size);
+  ei.image = NULL;
+
+  return ret;
+}
+
+HIDDEN Elf_W (Shdr)*
+elf_w (find_section) (struct elf_image *ei, const char* secname)
+{
+  Elf_W (Ehdr) *ehdr = ei->image;
+  Elf_W (Shdr) *shdr;
+  char *strtab;
+  int i;
+
+  if (!elf_w (valid_object) (ei))
+    return 0;
+
+  shdr = elf_w (section_table) (ei);
+  if (!shdr)
+    return 0;
+
+  strtab = elf_w (string_table) (ei, ehdr->e_shstrndx);
+  if (!strtab)
+    return 0;
+
+  for (i = 0; i < ehdr->e_shnum; ++i)
+    {
+      if (strcmp (strtab + shdr->sh_name, secname) == 0)
+        {
+          if (shdr->sh_offset + shdr->sh_size > ei->size)
+            {
+              Debug (1, "section \"%s\" outside image? (0x%lu > 0x%lu)\n",
+                     secname,
+                     (unsigned long) shdr->sh_offset + shdr->sh_size,
+                     (unsigned long) ei->size);
+              return 0;
+            }
+
+          Debug (16, "found section \"%s\" at 0x%lx\n",
+                 secname, (unsigned long) shdr->sh_offset);
+          return shdr;
+        }
+
+      shdr = (Elf_W (Shdr) *) (((char *) shdr) + ehdr->e_shentsize);
+    }
+
+  /* section not found */
+  return 0;
+}
+
+/* Load a debug section, following .gnu_debuglink if appropriate
+ * Loads ei from file if not already mapped.
+ * If is_local, will also search sys directories /usr/local/dbg
+ *
+ * Returns 0 on success, failure otherwise.
+ * ei will be mapped to file or the located .gnu_debuglink from file
+ */
+HIDDEN int
+elf_w (load_debuglink) (const char* file, struct elf_image *ei, int is_local)
+{
+  int ret;
+  Elf_W (Shdr) *shdr;
+  Elf_W (Ehdr) *prev_image;
+  off_t prev_size;
+
+  if (!ei->image)
+    {
+      ret = elf_map_image(ei, file);
+      if (ret)
+	return ret;
+    }
+
+  prev_image = ei->image;
+  prev_size = ei->size;
+
+  /* Ignore separate debug files which contain a .gnu_debuglink section. */
+  if (is_local == -1) {
+    return 0;
+  }
+
+  shdr = elf_w (find_section) (ei, ".gnu_debuglink");
+  if (shdr) {
+    if (shdr->sh_size >= PATH_MAX ||
+	(shdr->sh_offset + shdr->sh_size > ei->size))
+      {
+	return 0;
+      }
+
+    {
+      char linkbuf[shdr->sh_size];
+      char *link = ((char *) ei->image) + shdr->sh_offset;
+      char *p;
+      static const char *debugdir = "/usr/lib/debug";
+      char basedir[strlen(file) + 1];
+      char newname[shdr->sh_size + strlen (debugdir) + strlen (file) + 9];
+
+      memcpy(linkbuf, link, shdr->sh_size);
+
+      if (memchr (linkbuf, 0, shdr->sh_size) == NULL)
+	return 0;
+
+      ei->image = NULL;
+
+      Debug(1, "Found debuglink section, following %s\n", linkbuf);
+
+      p = strrchr (file, '/');
+      if (p != NULL)
+	{
+	  memcpy (basedir, file, p - file);
+	  basedir[p - file] = '\0';
+	}
+      else
+	basedir[0] = 0;
+
+      strcpy (newname, basedir);
+      strcat (newname, "/");
+      strcat (newname, linkbuf);
+      ret = elf_w (load_debuglink) (newname, ei, -1);
+
+      if (ret == -1)
+	{
+	  strcpy (newname, basedir);
+	  strcat (newname, "/.debug/");
+	  strcat (newname, linkbuf);
+	  ret = elf_w (load_debuglink) (newname, ei, -1);
+	}
+
+      if (ret == -1 && is_local == 1)
+	{
+	  strcpy (newname, debugdir);
+	  strcat (newname, basedir);
+	  strcat (newname, "/");
+	  strcat (newname, linkbuf);
+	  ret = elf_w (load_debuglink) (newname, ei, -1);
+	}
+
+      if (ret == -1)
+        {
+          /* No debuglink file found even though .gnu_debuglink existed */
+          ei->image = prev_image;
+          ei->size = prev_size;
+
+          return 0;
+        }
+      else
+        {
+          munmap (prev_image, prev_size);
+        }
+
+      return ret;
+    }
+  }
+
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/elfxx.h b/src/third_party/unwind/dist/src/elfxx.h
new file mode 100644
index 00000000000..830432c2ed1
--- /dev/null
+++ b/src/third_party/unwind/dist/src/elfxx.h
@@ -0,0 +1,101 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003, 2005 Hewlett-Packard Co
+   Copyright (C) 2007 David Mosberger-Tang
+        Contributed by David Mosberger-Tang <dmosberger@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <fcntl.h>
+#include <unistd.h>
+
+#include <sys/mman.h>
+#include <sys/stat.h>
+
+#include "libunwind_i.h"
+
+#if ELF_CLASS == ELFCLASS32
+# define ELF_W(x)       ELF32_##x
+# define Elf_W(x)       Elf32_##x
+# define elf_w(x)       _Uelf32_##x
+#else
+# define ELF_W(x)       ELF64_##x
+# define Elf_W(x)       Elf64_##x
+# define elf_w(x)       _Uelf64_##x
+#endif
+
+extern int elf_w (get_proc_name) (unw_addr_space_t as,
+                                  pid_t pid, unw_word_t ip,
+                                  char *buf, size_t len,
+                                  unw_word_t *offp);
+
+extern int elf_w (get_proc_name_in_image) (unw_addr_space_t as,
+                                           struct elf_image *ei,
+                                           unsigned long segbase,
+                                           unsigned long mapoff,
+                                           unw_word_t ip,
+                                           char *buf, size_t buf_len, unw_word_t *offp);
+
+extern Elf_W (Shdr)* elf_w (find_section) (struct elf_image *ei, const char* secname);
+extern int elf_w (load_debuglink) (const char* file, struct elf_image *ei, int is_local);
+
+static inline int
+elf_w (valid_object) (struct elf_image *ei)
+{
+  if (ei->size <= EI_VERSION)
+    return 0;
+
+  return (memcmp (ei->image, ELFMAG, SELFMAG) == 0
+          && ((uint8_t *) ei->image)[EI_CLASS] == ELF_CLASS
+          && ((uint8_t *) ei->image)[EI_VERSION] != EV_NONE
+          && ((uint8_t *) ei->image)[EI_VERSION] <= EV_CURRENT);
+}
+
+static inline int
+elf_map_image (struct elf_image *ei, const char *path)
+{
+  struct stat stat;
+  int fd;
+
+  fd = open (path, O_RDONLY);
+  if (fd < 0)
+    return -1;
+
+  if (fstat (fd, &stat) < 0)
+    {
+      close (fd);
+      return -1;
+    }
+
+  ei->size = stat.st_size;
+  ei->image = mmap (NULL, ei->size, PROT_READ, MAP_PRIVATE, fd, 0);
+  close (fd);
+  if (ei->image == MAP_FAILED)
+    return -1;
+
+  if (!elf_w (valid_object) (ei))
+  {
+    munmap(ei->image, ei->size);
+    return -1;
+  }
+
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/hppa/Gapply_reg_state.c b/src/third_party/unwind/dist/src/hppa/Gapply_reg_state.c
new file mode 100644
index 00000000000..82f056da67e
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/Gapply_reg_state.c
@@ -0,0 +1,37 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_apply_reg_state (unw_cursor_t *cursor,
+		     void *reg_states_data)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  return dwarf_apply_reg_state (&c->dwarf, (dwarf_reg_state_t *)reg_states_data);
+}
diff --git a/src/third_party/unwind/dist/src/hppa/Gcreate_addr_space.c b/src/third_party/unwind/dist/src/hppa/Gcreate_addr_space.c
new file mode 100644
index 00000000000..8a6cb8b4e67
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/Gcreate_addr_space.c
@@ -0,0 +1,54 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <stdlib.h>
+
+#include "unwind_i.h"
+
+unw_addr_space_t
+unw_create_addr_space (unw_accessors_t *a, int byte_order)
+{
+#ifdef UNW_LOCAL_ONLY
+  return NULL;
+#else
+  unw_addr_space_t as;
+
+  /*
+   * hppa supports only big-endian.
+   */
+  if (byte_order != 0 && byte_order != __BIG_ENDIAN)
+    return NULL;
+
+  as = malloc (sizeof (*as));
+  if (!as)
+    return NULL;
+
+  memset (as, 0, sizeof (*as));
+
+  as->acc = *a;
+
+  return as;
+#endif
+}
diff --git a/src/third_party/unwind/dist/src/hppa/Gget_proc_info.c b/src/third_party/unwind/dist/src/hppa/Gget_proc_info.c
new file mode 100644
index 00000000000..e10efcfca0d
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/Gget_proc_info.c
@@ -0,0 +1,46 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_get_proc_info (unw_cursor_t *cursor, unw_proc_info_t *pi)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  if (dwarf_make_proc_info (&c->dwarf) < 0)
+    {
+      /* On hppa, some key routines such as _start() and _dl_start()
+         are missing DWARF unwind info.  We don't want to fail in that
+         case, because those frames are uninteresting and just mark
+         the end of the frame-chain anyhow.  */
+      memset (pi, 0, sizeof (*pi));
+      pi->start_ip = c->dwarf.ip;
+      pi->end_ip = c->dwarf.ip + 4;
+      return 0;
+    }
+  *pi = c->dwarf.pi;
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/hppa/Gget_save_loc.c b/src/third_party/unwind/dist/src/hppa/Gget_save_loc.c
new file mode 100644
index 00000000000..02dfa3084f9
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/Gget_save_loc.c
@@ -0,0 +1,59 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_get_save_loc (unw_cursor_t *cursor, int reg, unw_save_loc_t *sloc)
+{
+  /* struct cursor *c = (struct cursor *) cursor; */
+  dwarf_loc_t loc;
+
+  loc = DWARF_NULL_LOC;         /* default to "not saved" */
+
+#warning FIX ME!
+
+  memset (sloc, 0, sizeof (*sloc));
+
+  if (DWARF_IS_NULL_LOC (loc))
+    {
+      sloc->type = UNW_SLT_NONE;
+      return 0;
+    }
+
+#if !defined(UNW_LOCAL_ONLY)
+  if (DWARF_IS_REG_LOC (loc))
+    {
+      sloc->type = UNW_SLT_REG;
+      sloc->u.regnum = DWARF_GET_LOC (loc);
+    }
+  else
+#endif
+    {
+      sloc->type = UNW_SLT_MEMORY;
+      sloc->u.addr = DWARF_GET_LOC (loc);
+    }
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/hppa/Gglobal.c b/src/third_party/unwind/dist/src/hppa/Gglobal.c
new file mode 100644
index 00000000000..351a5015d68
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/Gglobal.c
@@ -0,0 +1,55 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2004-2005 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+HIDDEN define_lock (hppa_lock);
+HIDDEN int tdep_init_done;
+
+HIDDEN void
+tdep_init (void)
+{
+  intrmask_t saved_mask;
+
+  sigfillset (&unwi_full_mask);
+
+  lock_acquire (&hppa_lock, saved_mask);
+  {
+    if (tdep_init_done)
+      /* another thread else beat us to it... */
+      goto out;
+
+    mi_init ();
+
+    dwarf_init ();
+
+#ifndef UNW_REMOTE_ONLY
+    hppa_local_addr_space_init ();
+#endif
+    tdep_init_done = 1; /* signal that we're initialized... */
+  }
+ out:
+  lock_release (&hppa_lock, saved_mask);
+}
diff --git a/src/third_party/unwind/dist/src/hppa/Ginit.c b/src/third_party/unwind/dist/src/hppa/Ginit.c
new file mode 100644
index 00000000000..461e4b93da6
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/Ginit.c
@@ -0,0 +1,194 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002, 2004 Hewlett-Packard Co
+   Copyright (C) 2007 David Mosberger-Tang
+        Contributed by David Mosberger-Tang <dmosberger@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "unwind_i.h"
+
+#ifdef UNW_REMOTE_ONLY
+
+/* unw_local_addr_space is a NULL pointer in this case.  */
+unw_addr_space_t unw_local_addr_space;
+
+#else /* !UNW_REMOTE_ONLY */
+
+static struct unw_addr_space local_addr_space;
+
+unw_addr_space_t unw_local_addr_space = &local_addr_space;
+
+static inline void *
+uc_addr (ucontext_t *uc, int reg)
+{
+  void *addr;
+
+  if ((unsigned) (reg - UNW_HPPA_GR) < 32)
+    addr = &uc->uc_mcontext.sc_gr[reg - UNW_HPPA_GR];
+  else if ((unsigned) (reg - UNW_HPPA_FR) < 32)
+    addr = &uc->uc_mcontext.sc_fr[reg - UNW_HPPA_FR];
+  else
+    addr = NULL;
+  return addr;
+}
+
+# ifdef UNW_LOCAL_ONLY
+
+void *
+_Uhppa_uc_addr (ucontext_t *uc, int reg)
+{
+  return uc_addr (uc, reg);
+}
+
+# endif /* UNW_LOCAL_ONLY */
+
+HIDDEN unw_dyn_info_list_t _U_dyn_info_list;
+
+/* XXX fix me: there is currently no way to locate the dyn-info list
+       by a remote unwinder.  On ia64, this is done via a special
+       unwind-table entry.  Perhaps something similar can be done with
+       DWARF2 unwind info.  */
+
+static void
+put_unwind_info (unw_addr_space_t as, unw_proc_info_t *proc_info, void *arg)
+{
+  /* it's a no-op */
+}
+
+static int
+get_dyn_info_list_addr (unw_addr_space_t as, unw_word_t *dyn_info_list_addr,
+                        void *arg)
+{
+  *dyn_info_list_addr = (unw_word_t) &_U_dyn_info_list;
+  return 0;
+}
+
+static int
+access_mem (unw_addr_space_t as, unw_word_t addr, unw_word_t *val, int write,
+            void *arg)
+{
+  if (write)
+    {
+      Debug (12, "mem[%x] <- %x\n", addr, *val);
+      *(unw_word_t *) addr = *val;
+    }
+  else
+    {
+      *val = *(unw_word_t *) addr;
+      Debug (12, "mem[%x] -> %x\n", addr, *val);
+    }
+  return 0;
+}
+
+static int
+access_reg (unw_addr_space_t as, unw_regnum_t reg, unw_word_t *val, int write,
+            void *arg)
+{
+  unw_word_t *addr;
+  ucontext_t *uc = arg;
+
+  if ((unsigned int) (reg - UNW_HPPA_FR) < 32)
+    goto badreg;
+
+  addr = uc_addr (uc, reg);
+  if (!addr)
+    goto badreg;
+
+  if (write)
+    {
+      *(unw_word_t *) addr = *val;
+      Debug (12, "%s <- %x\n", unw_regname (reg), *val);
+    }
+  else
+    {
+      *val = *(unw_word_t *) addr;
+      Debug (12, "%s -> %x\n", unw_regname (reg), *val);
+    }
+  return 0;
+
+ badreg:
+  Debug (1, "bad register number %u\n", reg);
+  return -UNW_EBADREG;
+}
+
+static int
+access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val,
+              int write, void *arg)
+{
+  ucontext_t *uc = arg;
+  unw_fpreg_t *addr;
+
+  if ((unsigned) (reg - UNW_HPPA_FR) > 32)
+    goto badreg;
+
+  addr = uc_addr (uc, reg);
+  if (!addr)
+    goto badreg;
+
+  if (write)
+    {
+      Debug (12, "%s <- %08x.%08x\n",
+             unw_regname (reg), val->raw.bits[1], val->raw.bits[0]);
+      *(unw_fpreg_t *) addr = *val;
+    }
+  else
+    {
+      *val = *(unw_fpreg_t *) addr;
+      Debug (12, "%s -> %08x.%08x\n",
+             unw_regname (reg), val->raw.bits[1], val->raw.bits[0]);
+    }
+  return 0;
+
+ badreg:
+  Debug (1, "bad register number %u\n", reg);
+  /* attempt to access a non-preserved register */
+  return -UNW_EBADREG;
+}
+
+static int
+get_static_proc_name (unw_addr_space_t as, unw_word_t ip,
+                      char *buf, size_t buf_len, unw_word_t *offp,
+                      void *arg)
+{
+  return _Uelf32_get_proc_name (as, getpid (), ip, buf, buf_len, offp);
+}
+
+HIDDEN void
+hppa_local_addr_space_init (void)
+{
+  memset (&local_addr_space, 0, sizeof (local_addr_space));
+  local_addr_space.caching_policy = UNWI_DEFAULT_CACHING_POLICY;
+  local_addr_space.acc.find_proc_info = dwarf_find_proc_info;
+  local_addr_space.acc.put_unwind_info = put_unwind_info;
+  local_addr_space.acc.get_dyn_info_list_addr = get_dyn_info_list_addr;
+  local_addr_space.acc.access_mem = access_mem;
+  local_addr_space.acc.access_reg = access_reg;
+  local_addr_space.acc.access_fpreg = access_fpreg;
+  local_addr_space.acc.resume = hppa_local_resume;
+  local_addr_space.acc.get_proc_name = get_static_proc_name;
+  unw_flush_cache (&local_addr_space, 0, 0);
+}
+
+#endif /* !UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/dist/src/hppa/Ginit_local.c b/src/third_party/unwind/dist/src/hppa/Ginit_local.c
new file mode 100644
index 00000000000..1fdc7716fd5
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/Ginit_local.c
@@ -0,0 +1,77 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003 Hewlett-Packard Co
+        Contributed by ...
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "init.h"
+
+#ifdef UNW_REMOTE_ONLY
+
+int
+unw_init_local (unw_cursor_t *cursor, ucontext_t *uc)
+{
+  return -UNW_EINVAL;
+}
+
+#else /* !UNW_REMOTE_ONLY */
+
+static int
+unw_init_local_common (unw_cursor_t *cursor, ucontext_t *uc, unsigned use_prev_instr)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  if (!tdep_init_done)
+    tdep_init ();
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  c->dwarf.as = unw_local_addr_space;
+  c->dwarf.as_arg = uc;
+  return common_init (c, use_prev_instr);
+}
+
+int
+unw_init_local (unw_cursor_t *cursor, ucontext_t *uc)
+{
+  return unw_init_local_common(cursor, uc, 1);
+}
+
+int
+unw_init_local2 (unw_cursor_t *cursor, ucontext_t *uc, int flag)
+{
+  if (!flag)
+    {
+      return unw_init_local_common(cursor, uc, 1);
+    }
+  else if (flag == UNW_INIT_SIGNAL_FRAME)
+    {
+      return unw_init_local_common(cursor, uc, 0);
+    }
+  else
+    {
+      return -UNW_EINVAL;
+    }
+}
+
+#endif /* !UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/dist/src/hppa/Ginit_remote.c b/src/third_party/unwind/dist/src/hppa/Ginit_remote.c
new file mode 100644
index 00000000000..71096ce0e61
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/Ginit_remote.c
@@ -0,0 +1,46 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2004 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "init.h"
+#include "unwind_i.h"
+
+int
+unw_init_remote (unw_cursor_t *cursor, unw_addr_space_t as, void *as_arg)
+{
+#ifdef UNW_LOCAL_ONLY
+  return -UNW_EINVAL;
+#else /* !UNW_LOCAL_ONLY */
+  struct cursor *c = (struct cursor *) cursor;
+
+  if (!tdep_init_done)
+    tdep_init ();
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  c->dwarf.as = as;
+  c->dwarf.as_arg = as_arg;
+  return common_init (c, 0);
+#endif /* !UNW_LOCAL_ONLY */
+}
diff --git a/src/third_party/unwind/dist/src/hppa/Gis_signal_frame.c b/src/third_party/unwind/dist/src/hppa/Gis_signal_frame.c
new file mode 100644
index 00000000000..addb551818a
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/Gis_signal_frame.c
@@ -0,0 +1,74 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_is_signal_frame (unw_cursor_t *cursor)
+{
+#ifdef __linux__ 
+  struct cursor *c = (struct cursor *) cursor;
+  unw_word_t w0, w1, w2, w3, ip;
+  unw_addr_space_t as;
+  unw_accessors_t *a;
+  void *arg;
+  int ret;
+
+  as = c->dwarf.as;
+  a = unw_get_accessors_int (as);
+  arg = c->dwarf.as_arg;
+
+  /* Check if IP points at sigreturn() sequence.  On Linux, this normally is:
+
+    rt_sigreturn:
+       0x34190000 ldi 0, %r25
+       0x3414015a ldi __NR_rt_sigreturn,%r20
+       0xe4008200 be,l 0x100(%sr2,%r0),%sr0,%r31
+       0x08000240 nop
+
+     When a signal interrupts a system call, the first word is instead:
+
+       0x34190002 ldi 1, %r25
+  */
+  ip = c->dwarf.ip;
+  if (!ip)
+    return 0;
+  if ((ret = (*a->access_mem) (as, ip, &w0, 0, arg)) < 0
+      || (ret = (*a->access_mem) (as, ip + 4, &w1, 0, arg)) < 0
+      || (ret = (*a->access_mem) (as, ip + 8, &w2, 0, arg)) < 0
+      || (ret = (*a->access_mem) (as, ip + 12, &w3, 0, arg)) < 0)
+    {
+      Debug (1, "failed to read sigreturn code (ret=%d)\n", ret);
+      return ret;
+    }
+  ret = ((w0 == 0x34190000 || w0 == 0x34190002)
+         && w1 == 0x3414015a && w2 == 0xe4008200 && w3 == 0x08000240);
+  Debug (1, "(cursor=%p, ip=0x%08lx) -> %d\n", c, (unsigned) ip, ret);
+  return ret;
+#else
+  printf ("%s: implement me\n", __FUNCTION__);
+#endif
+  return -UNW_ENOINFO;
+}
diff --git a/src/third_party/unwind/dist/src/hppa/Greg_states_iterate.c b/src/third_party/unwind/dist/src/hppa/Greg_states_iterate.c
new file mode 100644
index 00000000000..a17dc1b561d
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/Greg_states_iterate.c
@@ -0,0 +1,37 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_reg_states_iterate (unw_cursor_t *cursor,
+			unw_reg_states_callback cb, void *token)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  return dwarf_reg_states_iterate (&c->dwarf, cb, token);
+}
diff --git a/src/third_party/unwind/dist/src/hppa/Gregs.c b/src/third_party/unwind/dist/src/hppa/Gregs.c
new file mode 100644
index 00000000000..da0542c81ff
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/Gregs.c
@@ -0,0 +1,87 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+HIDDEN int
+tdep_access_reg (struct cursor *c, unw_regnum_t reg, unw_word_t *valp,
+                 int write)
+{
+  struct dwarf_loc loc;
+
+  switch (reg)
+    {
+    case UNW_HPPA_IP:
+      if (write)
+        c->dwarf.ip = *valp;            /* update the IP cache */
+      if (c->dwarf.pi_valid && (*valp < c->dwarf.pi.start_ip
+                                || *valp >= c->dwarf.pi.end_ip))
+        c->dwarf.pi_valid = 0;          /* new IP outside of current proc */
+      break;
+
+    case UNW_HPPA_CFA:
+    case UNW_HPPA_SP:
+      if (write)
+        return -UNW_EREADONLYREG;
+      *valp = c->dwarf.cfa;
+      return 0;
+
+      /* Do the exception-handling register remapping: */
+    case UNW_HPPA_EH0: reg = UNW_HPPA_GR + 20; break;
+    case UNW_HPPA_EH1: reg = UNW_HPPA_GR + 21; break;
+    case UNW_HPPA_EH2: reg = UNW_HPPA_GR + 22; break;
+    case UNW_HPPA_EH3: reg = UNW_HPPA_GR + 31; break;
+
+    default:
+      break;
+    }
+
+  if ((unsigned) (reg - UNW_HPPA_GR) >= 32)
+    return -UNW_EBADREG;
+
+  loc = c->dwarf.loc[reg];
+
+  if (write)
+    return dwarf_put (&c->dwarf, loc, *valp);
+  else
+    return dwarf_get (&c->dwarf, loc, valp);
+}
+
+HIDDEN int
+tdep_access_fpreg (struct cursor *c, unw_regnum_t reg, unw_fpreg_t *valp,
+                   int write)
+{
+  struct dwarf_loc loc;
+
+  if ((unsigned) (reg - UNW_HPPA_FR) >= 32)
+    return -UNW_EBADREG;
+
+  loc = c->dwarf.loc[reg];
+
+  if (write)
+    return dwarf_putfp (&c->dwarf, loc, *valp);
+  else
+    return dwarf_getfp (&c->dwarf, loc, valp);
+}
diff --git a/src/third_party/unwind/dist/src/hppa/Gresume.c b/src/third_party/unwind/dist/src/hppa/Gresume.c
new file mode 100644
index 00000000000..6c11f140364
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/Gresume.c
@@ -0,0 +1,145 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2004 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <stdlib.h>
+
+#include "unwind_i.h"
+
+#ifndef UNW_REMOTE_ONLY
+
+#if defined(__linux)
+
+# include <sys/syscall.h>
+
+static NORETURN inline long
+my_rt_sigreturn (void *new_sp, int in_syscall)
+{
+  register unsigned long r25 __asm__ ("r25") = (in_syscall != 0);
+  register unsigned long r20 __asm__ ("r20") = SYS_rt_sigreturn;
+
+  __asm__ __volatile__ ("copy %0, %%sp\n"
+                        "be,l 0x100(%%sr2,%%r0),%%sr0,%%r31\n"
+                        "nop"
+                        :
+                        : "r"(new_sp), "r"(r20), "r"(r25)
+                        : "memory");
+  abort ();
+}
+
+#endif /* __linux */
+
+HIDDEN inline int
+hppa_local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg)
+{
+#if defined(__linux)
+  struct cursor *c = (struct cursor *) cursor;
+  ucontext_t *uc = c->dwarf.as_arg;
+
+  /* Ensure c->pi is up-to-date.  On PA-RISC, it's relatively common to be
+     missing DWARF unwind info.  We don't want to fail in that case,
+     because the frame-chain still would let us do a backtrace at
+     least.  */
+  dwarf_make_proc_info (&c->dwarf);
+
+  if (unlikely (c->sigcontext_format != HPPA_SCF_NONE))
+    {
+      struct sigcontext *sc = (struct sigcontext *) c->sigcontext_addr;
+
+      Debug (8, "resuming at ip=%x via sigreturn(%p)\n", c->dwarf.ip, sc);
+      my_rt_sigreturn (sc, (sc->sc_flags & PARISC_SC_FLAG_IN_SYSCALL) != 0);
+    }
+  else
+    {
+      Debug (8, "resuming at ip=%x via setcontext()\n", c->dwarf.ip);
+      setcontext (uc);
+    }
+#else
+# warning Implement me!
+#endif
+  return -UNW_EINVAL;
+}
+
+#endif /* !UNW_REMOTE_ONLY */
+
+/* This routine is responsible for copying the register values in
+   cursor C and establishing them as the current machine state. */
+
+static inline int
+establish_machine_state (struct cursor *c)
+{
+  int (*access_reg) (unw_addr_space_t, unw_regnum_t, unw_word_t *,
+                     int write, void *);
+  int (*access_fpreg) (unw_addr_space_t, unw_regnum_t, unw_fpreg_t *,
+                       int write, void *);
+  unw_addr_space_t as = c->dwarf.as;
+  void *arg = c->dwarf.as_arg;
+  unw_fpreg_t fpval;
+  unw_word_t val;
+  int reg;
+
+  access_reg = as->acc.access_reg;
+  access_fpreg = as->acc.access_fpreg;
+
+  Debug (8, "copying out cursor state\n");
+
+  for (reg = 0; reg <= UNW_REG_LAST; ++reg)
+    {
+      Debug (16, "copying %s %d\n", unw_regname (reg), reg);
+      if (unw_is_fpreg (reg))
+        {
+          if (tdep_access_fpreg (c, reg, &fpval, 0) >= 0)
+            (*access_fpreg) (as, reg, &fpval, 1, arg);
+        }
+      else
+        {
+          if (tdep_access_reg (c, reg, &val, 0) >= 0)
+            (*access_reg) (as, reg, &val, 1, arg);
+        }
+    }
+  return 0;
+}
+
+int
+unw_resume (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  int ret;
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  if (!c->dwarf.ip)
+    {
+      /* This can happen easily when the frame-chain gets truncated
+         due to bad or missing unwind-info.  */
+      Debug (1, "refusing to resume execution at address 0\n");
+      return -UNW_EINVAL;
+    }
+
+  if ((ret = establish_machine_state (c)) < 0)
+    return ret;
+
+  return (*c->dwarf.as->acc.resume) (c->dwarf.as, (unw_cursor_t *) c,
+                                     c->dwarf.as_arg);
+}
diff --git a/src/third_party/unwind/dist/src/hppa/Gstep.c b/src/third_party/unwind/dist/src/hppa/Gstep.c
new file mode 100644
index 00000000000..4fc8a8776bf
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/Gstep.c
@@ -0,0 +1,95 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+        Contributed by David Mosberger
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "offsets.h"
+
+int
+unw_step (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  int ret, i;
+
+  Debug (1, "(cursor=%p, ip=0x%08x)\n", c, (unsigned) c->dwarf.ip);
+
+  /* Try DWARF-based unwinding... */
+  ret = dwarf_step (&c->dwarf);
+
+  if (ret < 0 && ret != -UNW_ENOINFO)
+    {
+      Debug (2, "returning %d\n", ret);
+      return ret;
+    }
+
+  if (unlikely (ret < 0))
+    {
+      /* DWARF failed, let's see if we can follow the frame-chain
+         or skip over the signal trampoline.  */
+
+      Debug (13, "dwarf_step() failed (ret=%d), trying fallback\n", ret);
+
+      if (unw_is_signal_frame (cursor))
+        {
+#ifdef __linux__
+          /* Assume that the trampoline is at the beginning of the
+             sigframe.  */
+          unw_word_t ip, sc_addr = c->dwarf.ip + LINUX_RT_SIGFRAME_UC_OFF;
+          dwarf_loc_t iaoq_loc = DWARF_LOC (sc_addr + LINUX_SC_IAOQ_OFF, 0);
+
+          c->sigcontext_format = HPPA_SCF_LINUX_RT_SIGFRAME;
+          c->sigcontext_addr = sc_addr;
+
+          if ((ret = dwarf_get (&c->dwarf, iaoq_loc, &ip)) < 0)
+            {
+              Debug (2, "failed to read IAOQ[1] (ret=%d)\n", ret);
+              return ret;
+            }
+          c->dwarf.ip = ip & ~0x3;      /* mask out the privilege level */
+
+          for (i = 0; i < 32; ++i)
+            {
+              c->dwarf.loc[UNW_HPPA_GR + i]
+                = DWARF_LOC (sc_addr + LINUX_SC_GR_OFF + 4*i, 0);
+              c->dwarf.loc[UNW_HPPA_FR + i]
+                = DWARF_LOC (sc_addr + LINUX_SC_FR_OFF + 4*i, 0);
+            }
+
+          if ((ret = dwarf_get (&c->dwarf, c->dwarf.loc[UNW_HPPA_SP],
+                                &c->dwarf.cfa)) < 0)
+            {
+              Debug (2, "failed to read SP (ret=%d)\n", ret);
+              return ret;
+            }
+#else
+# error Implement me!
+#endif
+        }
+      else
+        c->dwarf.ip = 0;
+    }
+  ret = (c->dwarf.ip == 0) ? 0 : 1;
+  Debug (2, "returning %d\n", ret);
+  return ret;
+}
diff --git a/src/third_party/unwind/dist/src/hppa/Lapply_reg_state.c b/src/third_party/unwind/dist/src/hppa/Lapply_reg_state.c
new file mode 100644
index 00000000000..7ebada480e5
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/Lapply_reg_state.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gapply_reg_state.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/hppa/Lcreate_addr_space.c b/src/third_party/unwind/dist/src/hppa/Lcreate_addr_space.c
new file mode 100644
index 00000000000..0f2dc6be901
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/Lcreate_addr_space.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gcreate_addr_space.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/hppa/Lget_proc_info.c b/src/third_party/unwind/dist/src/hppa/Lget_proc_info.c
new file mode 100644
index 00000000000..69028b019fc
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/Lget_proc_info.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gget_proc_info.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/hppa/Lget_save_loc.c b/src/third_party/unwind/dist/src/hppa/Lget_save_loc.c
new file mode 100644
index 00000000000..9ea048a9076
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/Lget_save_loc.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gget_save_loc.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/hppa/Lglobal.c b/src/third_party/unwind/dist/src/hppa/Lglobal.c
new file mode 100644
index 00000000000..6d7b489e14b
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/Lglobal.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gglobal.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/hppa/Linit.c b/src/third_party/unwind/dist/src/hppa/Linit.c
new file mode 100644
index 00000000000..e9abfdd46a3
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/Linit.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/hppa/Linit_local.c b/src/third_party/unwind/dist/src/hppa/Linit_local.c
new file mode 100644
index 00000000000..68a1687e854
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/Linit_local.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit_local.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/hppa/Linit_remote.c b/src/third_party/unwind/dist/src/hppa/Linit_remote.c
new file mode 100644
index 00000000000..58cb04ab7cd
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/Linit_remote.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit_remote.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/hppa/Lis_signal_frame.c b/src/third_party/unwind/dist/src/hppa/Lis_signal_frame.c
new file mode 100644
index 00000000000..b9a7c4f51ad
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/Lis_signal_frame.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gis_signal_frame.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/hppa/Lreg_states_iterate.c b/src/third_party/unwind/dist/src/hppa/Lreg_states_iterate.c
new file mode 100644
index 00000000000..f1eb1e79dcd
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/Lreg_states_iterate.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Greg_states_iterate.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/hppa/Lregs.c b/src/third_party/unwind/dist/src/hppa/Lregs.c
new file mode 100644
index 00000000000..2c9c75cd7d9
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/Lregs.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gregs.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/hppa/Lresume.c b/src/third_party/unwind/dist/src/hppa/Lresume.c
new file mode 100644
index 00000000000..41a8cf003de
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/Lresume.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gresume.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/hppa/Lstep.c b/src/third_party/unwind/dist/src/hppa/Lstep.c
new file mode 100644
index 00000000000..c1ac3c7547f
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/Lstep.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gstep.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/hppa/getcontext.S b/src/third_party/unwind/dist/src/hppa/getcontext.S
new file mode 100644
index 00000000000..ec7554a0259
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/getcontext.S
@@ -0,0 +1,74 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#define SPILL(n) stw %r##n, (LINUX_UC_MCONTEXT_OFF+LINUX_SC_GR_OFF+4*(n))(%r26)
+
+#include "offsets.h"
+
+	.align 4
+	.protected _Uhppa_getcontext
+	.global _Uhppa_getcontext
+	.proc
+	.callinfo
+_Uhppa_getcontext:
+	SPILL (2)		/* return-pointer */
+	SPILL (3)		/* frame pointer */
+	SPILL (4)		/* 2nd-ary frame pointer */
+	SPILL (5)		/* preserved register */
+	SPILL (6)		/* preserved register */
+	SPILL (7)		/* preserved register */
+	SPILL (8)		/* preserved register */
+	SPILL (9)		/* preserved register */
+	SPILL (10)		/* preserved register */
+	SPILL (11)		/* preserved register */
+	SPILL (12)		/* preserved register */
+	SPILL (13)		/* preserved register */
+	SPILL (14)		/* preserved register */
+	SPILL (15)		/* preserved register */
+	SPILL (16)		/* preserved register */
+	SPILL (17)		/* preserved register */
+	SPILL (18)		/* preserved register */
+	SPILL (19)		/* linkage-table register */
+	SPILL (27)		/* global-data pointer */
+	SPILL (30)		/* stack pointer */
+
+	ldo (LINUX_UC_MCONTEXT_OFF+LINUX_SC_FR_OFF)(%r26), %r29
+	fstds,ma %fr12, 8(%r29)
+	fstds,ma %fr13, 8(%r29)
+	fstds,ma %fr14, 8(%r29)
+	fstds,ma %fr15, 8(%r29)
+	fstds,ma %fr16, 8(%r29)
+	fstds,ma %fr17, 8(%r29)
+	fstds,ma %fr18, 8(%r29)
+	fstds,ma %fr19, 8(%r29)
+	fstds,ma %fr20, 8(%r29)
+	fstds    %fr21, 8(%r29)
+
+	bv,n	%r0(%rp)
+	.procend
+#ifdef __linux__
+	/* We do not need executable stack.  */
+	.section	.note.GNU-stack,"",@progbits
+#endif
diff --git a/src/third_party/unwind/dist/src/hppa/init.h b/src/third_party/unwind/dist/src/hppa/init.h
new file mode 100644
index 00000000000..4e23b861327
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/init.h
@@ -0,0 +1,47 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003 Hewlett-Packard Co
+        Contributed by ...
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+static inline int
+common_init (struct cursor *c, unsigned use_prev_instr)
+{
+  int ret;
+
+  c->dwarf.loc[UNW_HPPA_IP] = DWARF_REG_LOC (&c->dwarf, UNW_HPPA_IP);
+  c->dwarf.loc[UNW_HPPA_SP] = DWARF_REG_LOC (&c->dwarf, UNW_HPPA_SP);
+
+  ret = dwarf_get (&c->dwarf, c->dwarf.loc[UNW_HPPA_IP], &c->dwarf.ip);
+  if (ret < 0)
+    return ret;
+
+  ret = dwarf_get (&c->dwarf, c->dwarf.loc[UNW_HPPA_SP], &c->dwarf.cfa);
+  if (ret < 0)
+    return ret;
+
+  c->dwarf.stash_frames = 0;
+  c->dwarf.use_prev_instr = use_prev_instr;
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/hppa/offsets.h b/src/third_party/unwind/dist/src/hppa/offsets.h
new file mode 100644
index 00000000000..24e6453ac4f
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/offsets.h
@@ -0,0 +1,17 @@
+#define LINUX_UC_FLAGS_OFF      0x000
+#define LINUX_UC_LINK_OFF       0x004
+#define LINUX_UC_STACK_OFF      0x008
+#define LINUX_UC_MCONTEXT_OFF   0x018
+#define LINUX_UC_SIGMASK_OFF    0x1b8
+
+#define LINUX_SC_FLAGS_OFF      0x000
+#define LINUX_SC_GR_OFF         0x004
+#define LINUX_SC_FR_OFF         0x088
+#define LINUX_SC_IASQ_OFF       0x188
+#define LINUX_SC_IAOQ_OFF       0x190
+#define LINUX_SC_SAR_OFF        0x198
+
+/* The signal frame contains 4 words of space for the sigreturn
+   trampoline, the siginfo structure, and then the sigcontext
+   structure.  See include/asm-parisc/compat_rt_sigframe.h.  */
+#define LINUX_RT_SIGFRAME_UC_OFF        0xac
diff --git a/src/third_party/unwind/dist/src/hppa/regname.c b/src/third_party/unwind/dist/src/hppa/regname.c
new file mode 100644
index 00000000000..5698a58ada9
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/regname.c
@@ -0,0 +1,50 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2004-2005 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+static const char *regname[] =
+  {
+    "r0",  "r1",  "r2",  "r3",  "r4",  "r5",  "r6",  "r7",
+    "r8",  "r9", "r10", "r11", "r12", "r13", "r14", "r15",
+    "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
+    "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
+    "fr0",  "fr1",  "fr2",  "fr3",  "fr4",  "fr5",  "fr6",  "fr7",
+    "fr8",  "fr9", "fr10", "fr11", "fr12", "fr13", "fr14", "fr15",
+    "fr16", "fr17", "fr18", "fr19", "fr20", "fr21", "fr22", "fr23",
+    "fr24", "fr25", "fr26", "fr27", "fr28", "fr29", "fr30", "fr31",
+    "ip",
+    "eh0", "eh1", "eh2", "eh3",
+    "cfa"
+  };
+
+const char *
+unw_regname (unw_regnum_t reg)
+{
+  if (reg < (unw_regnum_t) ARRAY_SIZE (regname))
+    return regname[reg];
+  else
+    return "???";
+}
diff --git a/src/third_party/unwind/dist/src/hppa/setcontext.S b/src/third_party/unwind/dist/src/hppa/setcontext.S
new file mode 100644
index 00000000000..a36ea35cc61
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/setcontext.S
@@ -0,0 +1,77 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* The setcontext() in glibc is a no-op (as of 4 Dec 2004), so we have
+   to implement something useful on our own here.  */
+
+#define FILL(n) ldw (LINUX_UC_MCONTEXT_OFF+LINUX_SC_GR_OFF+4*(n))(%r26),%r##n
+
+#include "offsets.h"
+
+	.align 4
+	.global _Uhppa_setcontext
+	.protected _Uhppa_setcontext
+	.proc
+	.callinfo
+_Uhppa_setcontext:
+	FILL (2)		/* return-pointer */
+	FILL (3)		/* frame pointer */
+	FILL (4)		/* 2nd-ary frame pointer */
+	FILL (5)		/* preserved register */
+	FILL (6)		/* preserved register */
+	FILL (7)		/* preserved register */
+	FILL (8)		/* preserved register */
+	FILL (9)		/* preserved register */
+	FILL (10)		/* preserved register */
+	FILL (11)		/* preserved register */
+	FILL (12)		/* preserved register */
+	FILL (13)		/* preserved register */
+	FILL (14)		/* preserved register */
+	FILL (15)		/* preserved register */
+	FILL (16)		/* preserved register */
+	FILL (17)		/* preserved register */
+	FILL (18)		/* preserved register */
+	FILL (19)		/* linkage-table register */
+	FILL (27)		/* global-data pointer */
+	FILL (30)		/* stack pointer */
+
+	ldo (LINUX_UC_MCONTEXT_OFF+LINUX_SC_FR_OFF)(%r26), %r29
+	fldds,ma 8(%r29), %fr12
+	fldds,ma 8(%r29), %fr13
+	fldds,ma 8(%r29), %fr14
+	fldds,ma 8(%r29), %fr15
+	fldds,ma 8(%r29), %fr16
+	fldds,ma 8(%r29), %fr17
+	fldds,ma 8(%r29), %fr18
+	fldds,ma 8(%r29), %fr19
+	fldds,ma 8(%r29), %fr20
+	fldds    8(%r29), %fr21
+
+	bv,n	%r0(%rp)
+	.procend
+#ifdef __linux__
+	/* We do not need executable stack.  */
+	.section	.note.GNU-stack,"",@progbits
+#endif
diff --git a/src/third_party/unwind/dist/src/hppa/siglongjmp.S b/src/third_party/unwind/dist/src/hppa/siglongjmp.S
new file mode 100644
index 00000000000..34878dbe8f3
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/siglongjmp.S
@@ -0,0 +1,16 @@
+	/* Dummy implementation for now.  */
+
+	.globl _UI_siglongjmp_cont
+	.globl _UI_longjmp_cont
+
+_UI_siglongjmp_cont:
+_UI_longjmp_cont:
+	.proc
+	.callinfo
+#warning fix me
+	bv	%r0(%rp)
+	.procend
+#ifdef __linux__
+	/* We do not need executable stack.  */
+	.section	.note.GNU-stack,"",@progbits
+#endif
diff --git a/src/third_party/unwind/dist/src/hppa/unwind_i.h b/src/third_party/unwind/dist/src/hppa/unwind_i.h
new file mode 100644
index 00000000000..cafeab57b88
--- /dev/null
+++ b/src/third_party/unwind/dist/src/hppa/unwind_i.h
@@ -0,0 +1,47 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004-2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef unwind_i_h
+#define unwind_i_h
+
+#include <stdint.h>
+
+#include <libunwind-hppa.h>
+
+#include "libunwind_i.h"
+
+#define hppa_lock                       UNW_OBJ(lock)
+#define hppa_local_resume               UNW_OBJ(local_resume)
+#define hppa_local_addr_space_init      UNW_OBJ(local_addr_space_init)
+#define hppa_scratch_loc                UNW_OBJ(scratch_loc)
+#define setcontext                      UNW_ARCH_OBJ (setcontext)
+
+extern void hppa_local_addr_space_init (void);
+extern int hppa_local_resume (unw_addr_space_t as, unw_cursor_t *cursor,
+                              void *arg);
+extern dwarf_loc_t hppa_scratch_loc (struct cursor *c, unw_regnum_t reg);
+extern int setcontext (const ucontext_t *ucp);
+
+#endif /* unwind_i_h */
diff --git a/src/third_party/unwind/dist/src/ia64/Gapply_reg_state.c b/src/third_party/unwind/dist/src/ia64/Gapply_reg_state.c
new file mode 100644
index 00000000000..b45d1b5d9cc
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Gapply_reg_state.c
@@ -0,0 +1,39 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_apply_reg_state (unw_cursor_t *cursor,
+		     void *reg_states_data)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  // Needs dwarf support on ia64
+  // return dwarf_apply_reg_state (&c->dwarf, (dwarf_reg_state_t *)reg_states_data);
+  return -UNW_EINVAL;
+}
diff --git a/src/third_party/unwind/dist/src/ia64/Gcreate_addr_space.c b/src/third_party/unwind/dist/src/ia64/Gcreate_addr_space.c
new file mode 100644
index 00000000000..7ad29cbbd39
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Gcreate_addr_space.c
@@ -0,0 +1,63 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <stdlib.h>
+
+#include "unwind_i.h"
+
+unw_addr_space_t
+unw_create_addr_space (unw_accessors_t *a, int byte_order)
+{
+#ifdef UNW_LOCAL_ONLY
+  return NULL;
+#else
+  unw_addr_space_t as;
+
+  /*
+   * IA-64 supports only big or little-endian, not weird stuff like
+   * PDP_ENDIAN.
+   */
+  if (byte_order != 0
+      && byte_order != __LITTLE_ENDIAN
+      && byte_order != __BIG_ENDIAN)
+    return NULL;
+
+  as = malloc (sizeof (*as));
+
+  if (!as)
+    return NULL;
+
+  memset (as, 0, sizeof (*as));
+
+  as->acc = *a;
+
+  if (byte_order == 0)
+    /* use host default: */
+    as->big_endian = (__BYTE_ORDER == __BIG_ENDIAN);
+  else
+    as->big_endian = (byte_order == __BIG_ENDIAN);
+  return as;
+#endif
+}
diff --git a/src/third_party/unwind/dist/src/ia64/Gfind_unwind_table.c b/src/third_party/unwind/dist/src/ia64/Gfind_unwind_table.c
new file mode 100644
index 00000000000..9fd2707ace4
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Gfind_unwind_table.c
@@ -0,0 +1,143 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+#include <elf.h>
+#include <fcntl.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <sys/mman.h>
+
+#include "libunwind_i.h"
+#include "elf64.h"
+
+static unw_word_t
+find_gp (struct elf_dyn_info *edi, Elf64_Phdr *pdyn, Elf64_Addr load_base)
+{
+  Elf64_Off soff, str_soff;
+  Elf64_Ehdr *ehdr = edi->ei.image;
+  Elf64_Shdr *shdr;
+  Elf64_Shdr *str_shdr;
+  Elf64_Addr gp = 0;
+  char *strtab;
+  int i;
+
+  if (pdyn)
+    {
+      /* If we have a PT_DYNAMIC program header, fetch the gp-value
+         from the DT_PLTGOT entry.  */
+      Elf64_Dyn *dyn = (Elf64_Dyn *) (pdyn->p_offset + (char *) edi->ei.image);
+      for (; dyn->d_tag != DT_NULL; ++dyn)
+        if (dyn->d_tag == DT_PLTGOT)
+          {
+            gp = (Elf64_Addr) dyn->d_un.d_ptr + load_base;
+            goto done;
+          }
+    }
+
+  /* Without a PT_DYAMIC header, lets try to look for a non-empty .opd
+     section.  If there is such a section, we know it's full of
+     function descriptors, and we can simply pick up the gp from the
+     second word of the first entry in this table.  */
+
+  soff = ehdr->e_shoff;
+  str_soff = soff + (ehdr->e_shstrndx * ehdr->e_shentsize);
+
+  if (soff + ehdr->e_shnum * ehdr->e_shentsize > edi->ei.size)
+    {
+      Debug (1, "section table outside of image? (%lu > %lu)",
+             soff + ehdr->e_shnum * ehdr->e_shentsize,
+             edi->ei.size);
+      goto done;
+    }
+
+  shdr = (Elf64_Shdr *) ((char *) edi->ei.image + soff);
+  str_shdr = (Elf64_Shdr *) ((char *) edi->ei.image + str_soff);
+  strtab = (char *) edi->ei.image + str_shdr->sh_offset;
+  for (i = 0; i < ehdr->e_shnum; ++i)
+    {
+      if (strcmp (strtab + shdr->sh_name, ".opd") == 0
+          && shdr->sh_size >= 16)
+        {
+          gp = ((Elf64_Addr *) ((char *) edi->ei.image + shdr->sh_offset))[1];
+          goto done;
+        }
+      shdr = (Elf64_Shdr *) (((char *) shdr) + ehdr->e_shentsize);
+    }
+
+ done:
+  Debug (16, "image at %p, gp = %lx\n", edi->ei.image, gp);
+  return gp;
+}
+
+int
+ia64_find_unwind_table (struct elf_dyn_info *edi, unw_addr_space_t as,
+                         char *path, unw_word_t segbase, unw_word_t mapoff,
+                         unw_word_t ip)
+{
+  Elf64_Phdr *phdr, *ptxt = NULL, *punw = NULL, *pdyn = NULL;
+  Elf64_Ehdr *ehdr;
+  int i;
+
+  if (!_Uelf64_valid_object (&edi->ei))
+    return -UNW_ENOINFO;
+
+  ehdr = edi->ei.image;
+  phdr = (Elf64_Phdr *) ((char *) edi->ei.image + ehdr->e_phoff);
+
+  for (i = 0; i < ehdr->e_phnum; ++i)
+    {
+      switch (phdr[i].p_type)
+        {
+        case PT_LOAD:
+          if (phdr[i].p_offset == mapoff)
+            ptxt = phdr + i;
+          break;
+
+        case PT_IA_64_UNWIND:
+          punw = phdr + i;
+          break;
+
+        case PT_DYNAMIC:
+          pdyn = phdr + i;
+          break;
+
+        default:
+          break;
+        }
+    }
+  if (!ptxt || !punw)
+    return 0;
+
+  edi->di_cache.start_ip = segbase;
+  edi->di_cache.end_ip = edi->di_cache.start_ip + ptxt->p_memsz;
+  edi->di_cache.gp = find_gp (edi, pdyn, segbase - ptxt->p_vaddr);
+  edi->di_cache.format = UNW_INFO_FORMAT_TABLE;
+  edi->di_cache.u.ti.name_ptr = 0;
+  edi->di_cache.u.ti.segbase = segbase;
+  edi->di_cache.u.ti.table_len = punw->p_memsz / sizeof (unw_word_t);
+  edi->di_cache.u.ti.table_data = (unw_word_t *)
+    ((char *) edi->ei.image + (punw->p_vaddr - ptxt->p_vaddr));
+  return 1;
+}
diff --git a/src/third_party/unwind/dist/src/ia64/Gget_proc_info.c b/src/third_party/unwind/dist/src/ia64/Gget_proc_info.c
new file mode 100644
index 00000000000..3ec82b9f82c
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Gget_proc_info.c
@@ -0,0 +1,38 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_get_proc_info (unw_cursor_t *cursor, unw_proc_info_t *pi)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  int ret;
+
+  if ((ret = ia64_make_proc_info (c)) < 0)
+    return ret;
+  *pi = c->pi;
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/ia64/Gget_save_loc.c b/src/third_party/unwind/dist/src/ia64/Gget_save_loc.c
new file mode 100644
index 00000000000..34efe99a752
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Gget_save_loc.c
@@ -0,0 +1,168 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002-2003, 2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <assert.h>
+
+#include "rse.h"
+
+#include "offsets.h"
+#include "regs.h"
+
+int
+unw_get_save_loc (unw_cursor_t *cursor, int reg, unw_save_loc_t *sloc)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  ia64_loc_t loc, reg_loc;
+  uint8_t nat_bitnr;
+  int ret;
+
+  loc = IA64_NULL_LOC;          /* default to "not saved" */
+
+  switch (reg)
+    {
+      /* frame registers */
+    case UNW_IA64_BSP:
+    case UNW_REG_SP:
+    default:
+      break;
+
+    case UNW_REG_IP:
+      loc = c->loc[IA64_REG_IP];
+      break;
+
+      /* preserved registers: */
+    case UNW_IA64_GR + 4 ... UNW_IA64_GR + 7:
+      loc = c->loc[IA64_REG_R4 + (reg - (UNW_IA64_GR + 4))];
+      break;
+
+    case UNW_IA64_NAT + 4 ... UNW_IA64_NAT + 7:
+      loc = c->loc[IA64_REG_NAT4 + (reg - (UNW_IA64_NAT + 4))];
+      reg_loc = c->loc[IA64_REG_R4 + (reg - (UNW_IA64_NAT + 4))];
+      nat_bitnr = c->nat_bitnr[reg - (UNW_IA64_NAT + 4)];
+      if (IA64_IS_FP_LOC (reg_loc))
+        /* NaT bit saved as a NaTVal.  */
+        loc = reg_loc;
+      break;
+
+    case UNW_IA64_FR + 2: loc = c->loc[IA64_REG_F2]; break;
+    case UNW_IA64_FR + 3: loc = c->loc[IA64_REG_F3]; break;
+    case UNW_IA64_FR + 4: loc = c->loc[IA64_REG_F4]; break;
+    case UNW_IA64_FR + 5: loc = c->loc[IA64_REG_F5]; break;
+    case UNW_IA64_FR + 16 ... UNW_IA64_FR + 31:
+      loc = c->loc[IA64_REG_F16 + (reg - (UNW_IA64_FR + 16))];
+      break;
+
+    case UNW_IA64_AR_BSP:       loc = c->loc[IA64_REG_BSP]; break;
+    case UNW_IA64_AR_BSPSTORE:  loc = c->loc[IA64_REG_BSPSTORE]; break;
+    case UNW_IA64_AR_PFS:       loc = c->loc[IA64_REG_PFS]; break;
+    case UNW_IA64_AR_RNAT:      loc = c->loc[IA64_REG_RNAT]; break;
+    case UNW_IA64_AR_UNAT:      loc = c->loc[IA64_REG_UNAT]; break;
+    case UNW_IA64_AR_LC:        loc = c->loc[IA64_REG_LC]; break;
+    case UNW_IA64_AR_FPSR:      loc = c->loc[IA64_REG_FPSR]; break;
+    case UNW_IA64_BR + 1:       loc = c->loc[IA64_REG_B1]; break;
+    case UNW_IA64_BR + 2:       loc = c->loc[IA64_REG_B2]; break;
+    case UNW_IA64_BR + 3:       loc = c->loc[IA64_REG_B3]; break;
+    case UNW_IA64_BR + 4:       loc = c->loc[IA64_REG_B4]; break;
+    case UNW_IA64_BR + 5:       loc = c->loc[IA64_REG_B5]; break;
+    case UNW_IA64_CFM:          loc = c->cfm_loc; break;
+    case UNW_IA64_PR:           loc = c->loc[IA64_REG_PR]; break;
+
+    case UNW_IA64_GR + 32 ... UNW_IA64_GR + 127:        /* stacked reg */
+      reg = rotate_gr (c, reg - UNW_IA64_GR);
+      ret = ia64_get_stacked (c, reg, &loc, NULL);
+      if (ret < 0)
+        return ret;
+      break;
+
+    case UNW_IA64_NAT + 32 ... UNW_IA64_NAT + 127:      /* stacked reg */
+      reg = rotate_gr (c, reg - UNW_IA64_NAT);
+      ret = ia64_get_stacked (c, reg, NULL, &loc);
+      break;
+
+    case UNW_IA64_AR_EC:
+      loc = c->cfm_loc;
+      break;
+
+      /* scratch & special registers: */
+
+    case UNW_IA64_GR + 0:
+    case UNW_IA64_GR + 1:                               /* global pointer */
+    case UNW_IA64_NAT + 0:
+    case UNW_IA64_NAT + 1:                              /* global pointer */
+    case UNW_IA64_FR + 0:
+    case UNW_IA64_FR + 1:
+      break;
+
+    case UNW_IA64_NAT + 2 ... UNW_IA64_NAT + 3:
+    case UNW_IA64_NAT + 8 ... UNW_IA64_NAT + 31:
+      loc = ia64_scratch_loc (c, reg, &nat_bitnr);
+      break;
+
+    case UNW_IA64_GR + 2 ... UNW_IA64_GR + 3:
+    case UNW_IA64_GR + 8 ... UNW_IA64_GR + 31:
+    case UNW_IA64_BR + 0:
+    case UNW_IA64_BR + 6:
+    case UNW_IA64_BR + 7:
+    case UNW_IA64_AR_RSC:
+    case UNW_IA64_AR_CSD:
+    case UNW_IA64_AR_SSD:
+    case UNW_IA64_AR_CCV:
+      loc = ia64_scratch_loc (c, reg, NULL);
+      break;
+
+    case UNW_IA64_FR + 6 ... UNW_IA64_FR + 15:
+      loc = ia64_scratch_loc (c, reg, NULL);
+      break;
+
+    case UNW_IA64_FR + 32 ... UNW_IA64_FR + 127:
+      reg = rotate_fr (c, reg - UNW_IA64_FR) + UNW_IA64_FR;
+      loc = ia64_scratch_loc (c, reg, NULL);
+      break;
+    }
+
+  memset (sloc, 0, sizeof (*sloc));
+
+  if (IA64_IS_NULL_LOC (loc))
+    {
+      sloc->type = UNW_SLT_NONE;
+      return 0;
+    }
+
+#if !defined(UNW_LOCAL_ONLY)
+  if (IA64_IS_REG_LOC (loc))
+    {
+      sloc->type = UNW_SLT_REG;
+      sloc->u.regnum = IA64_GET_REG (loc);
+      sloc->extra.nat_bitnr = nat_bitnr;
+    }
+  else
+#endif
+    {
+      sloc->type = UNW_SLT_MEMORY;
+      sloc->u.addr = IA64_GET_ADDR (loc);
+      sloc->extra.nat_bitnr = nat_bitnr;
+    }
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/ia64/Gglobal.c b/src/third_party/unwind/dist/src/ia64/Gglobal.c
new file mode 100644
index 00000000000..5c6156f0e22
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Gglobal.c
@@ -0,0 +1,122 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002-2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <assert.h>
+
+#include "unwind_i.h"
+
+HIDDEN struct ia64_global_unwind_state unw =
+  {
+    .lock = PTHREAD_MUTEX_INITIALIZER,
+    .save_order = {
+      IA64_REG_IP, IA64_REG_PFS, IA64_REG_PSP, IA64_REG_PR,
+      IA64_REG_UNAT, IA64_REG_LC, IA64_REG_FPSR, IA64_REG_PRI_UNAT_GR
+    },
+#if UNW_DEBUG
+    .preg_name = {
+      "pri_unat_gr", "pri_unat_mem", "psp", "bsp", "bspstore",
+      "ar.pfs", "ar.rnat", "rp",
+      "r4", "r5", "r6", "r7",
+      "nat4", "nat5", "nat6", "nat7",
+      "ar.unat", "pr", "ar.lc", "ar.fpsr",
+      "b1", "b2", "b3", "b4", "b5",
+      "f2", "f3", "f4", "f5",
+      "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",
+      "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31"
+    }
+#endif
+};
+
+HIDDEN void
+tdep_init (void)
+{
+  const uint8_t f1_bytes[16] = {
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff,
+    0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+  };
+  const uint8_t nat_val_bytes[16] = {
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xff, 0xfe,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+  };
+  const uint8_t int_val_bytes[16] = {
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x3e,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+  };
+  intrmask_t saved_mask;
+  uint8_t *lep, *bep;
+  long i;
+
+  sigfillset (&unwi_full_mask);
+
+  lock_acquire (&unw.lock, saved_mask);
+  {
+    if (tdep_init_done)
+      /* another thread else beat us to it... */
+      goto out;
+
+    mi_init ();
+
+    mempool_init (&unw.reg_state_pool, sizeof (struct ia64_reg_state), 0);
+    mempool_init (&unw.labeled_state_pool,
+                  sizeof (struct ia64_labeled_state), 0);
+
+    unw.read_only.r0 = 0;
+    unw.read_only.f0.raw.bits[0] = 0;
+    unw.read_only.f0.raw.bits[1] = 0;
+
+    lep = (uint8_t *) &unw.read_only.f1_le + 16;
+    bep = (uint8_t *) &unw.read_only.f1_be;
+    for (i = 0; i < 16; ++i)
+      {
+        *--lep = f1_bytes[i];
+        *bep++ = f1_bytes[i];
+      }
+
+    lep = (uint8_t *) &unw.nat_val_le + 16;
+    bep = (uint8_t *) &unw.nat_val_be;
+    for (i = 0; i < 16; ++i)
+      {
+        *--lep = nat_val_bytes[i];
+        *bep++ = nat_val_bytes[i];
+      }
+
+    lep = (uint8_t *) &unw.int_val_le + 16;
+    bep = (uint8_t *) &unw.int_val_be;
+    for (i = 0; i < 16; ++i)
+      {
+        *--lep = int_val_bytes[i];
+        *bep++ = int_val_bytes[i];
+      }
+
+    assert (8*sizeof(unw_hash_index_t) >= IA64_LOG_UNW_HASH_SIZE);
+
+#ifndef UNW_REMOTE_ONLY
+    ia64_local_addr_space_init ();
+#endif
+    tdep_init_done = 1; /* signal that we're initialized... */
+  }
+ out:
+  lock_release (&unw.lock, saved_mask);
+}
diff --git a/src/third_party/unwind/dist/src/ia64/Ginit.c b/src/third_party/unwind/dist/src/ia64/Ginit.c
new file mode 100644
index 00000000000..b09a2ad57c7
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Ginit.c
@@ -0,0 +1,505 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2005 Hewlett-Packard Co
+   Copyright (C) 2007 David Mosberger-Tang
+        Contributed by David Mosberger-Tang <dmosberger@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+#ifdef HAVE_SYS_UC_ACCESS_H
+# include <sys/uc_access.h>
+#endif
+
+#ifdef UNW_REMOTE_ONLY
+
+/* unw_local_addr_space is a NULL pointer in this case.  */
+unw_addr_space_t unw_local_addr_space;
+
+#else /* !UNW_REMOTE_ONLY */
+
+static struct unw_addr_space local_addr_space;
+
+unw_addr_space_t unw_local_addr_space = &local_addr_space;
+
+#ifdef HAVE_SYS_UC_ACCESS_H
+
+#else /* !HAVE_SYS_UC_ACCESS_H */
+
+HIDDEN void *
+tdep_uc_addr (ucontext_t *uc, int reg, uint8_t *nat_bitnr)
+{
+  return inlined_uc_addr (uc, reg, nat_bitnr);
+}
+
+#endif /* !HAVE_SYS_UC_ACCESS_H */
+
+static void
+put_unwind_info (unw_addr_space_t as, unw_proc_info_t *proc_info, void *arg)
+{
+  /* it's a no-op */
+}
+
+static int
+get_dyn_info_list_addr (unw_addr_space_t as, unw_word_t *dyn_info_list_addr,
+                        void *arg)
+{
+#ifndef UNW_LOCAL_ONLY
+# pragma weak _U_dyn_info_list_addr
+  if (!_U_dyn_info_list_addr)
+    return -UNW_ENOINFO;
+#endif
+  *dyn_info_list_addr = _U_dyn_info_list_addr ();
+  return 0;
+}
+
+static int
+access_mem (unw_addr_space_t as, unw_word_t addr, unw_word_t *val, int write,
+            void *arg)
+{
+  if (write)
+    {
+      Debug (12, "mem[%lx] <- %lx\n", addr, *val);
+      *(unw_word_t *) addr = *val;
+    }
+  else
+    {
+      *val = *(unw_word_t *) addr;
+      Debug (12, "mem[%lx] -> %lx\n", addr, *val);
+    }
+  return 0;
+}
+
+#ifdef HAVE_SYS_UC_ACCESS_H
+
+#define SYSCALL_CFM_SAVE_REG    11 /* on a syscall, ar.pfs is saved in r11 */
+#define REASON_SYSCALL          0
+
+static int
+access_reg (unw_addr_space_t as, unw_regnum_t reg, unw_word_t *val, int write,
+            void *arg)
+{
+  ucontext_t *uc = arg;
+  unsigned int nat, mask;
+  uint64_t value;
+  uint16_t reason;
+  int ret;
+
+  __uc_get_reason (uc, &reason);
+
+  switch (reg)
+    {
+    case UNW_IA64_GR  ... UNW_IA64_GR + 31:
+      if ((ret = __uc_get_grs (uc, (reg - UNW_IA64_GR), 1, &value, &nat)))
+        break;
+
+      if (write)
+        ret = __uc_set_grs (uc, (reg - UNW_IA64_GR), 1, val, nat);
+      else
+        *val = value;
+      break;
+
+    case UNW_IA64_NAT ... UNW_IA64_NAT + 31:
+      if ((ret = __uc_get_grs (uc, (reg - UNW_IA64_GR), 1, &value, &nat)))
+        break;
+
+      mask = 1 << (reg - UNW_IA64_GR);
+
+      if (write)
+        {
+          if (*val)
+            nat |= mask;
+          else
+            nat &= ~mask;
+          ret = __uc_set_grs (uc, (reg - UNW_IA64_GR), 1, &value, nat);
+        }
+      else
+        *val = (nat & mask) != 0;
+      break;
+
+    case UNW_IA64_AR  ... UNW_IA64_AR + 127:
+      if (reg == UNW_IA64_AR_BSP)
+        {
+          if (write)
+            ret = __uc_set_ar (uc, (reg - UNW_IA64_AR), *val);
+          else
+            ret = __uc_get_ar (uc, (reg - UNW_IA64_AR), val);
+        }
+      else if (reg == UNW_IA64_AR_PFS && reason == REASON_SYSCALL)
+        {
+          /* As of HP-UX 11.22, getcontext() does not have unwind info
+             and because of that, we need to hack thins manually here.
+             Hopefully, this is OK because the HP-UX kernel also needs
+             to know where AR.PFS has been saved, so the use of
+             register r11 for this purpose is pretty much nailed
+             down.  */
+          if (write)
+            ret = __uc_set_grs (uc, SYSCALL_CFM_SAVE_REG, 1, val, 0);
+          else
+            ret = __uc_get_grs (uc, SYSCALL_CFM_SAVE_REG, 1, val, &nat);
+        }
+      else
+        {
+          if (write)
+            ret = __uc_set_ar (uc, (reg - UNW_IA64_AR), *val);
+          else
+            ret = __uc_get_ar (uc, (reg - UNW_IA64_AR), val);
+        }
+      break;
+
+    case UNW_IA64_BR  ... UNW_IA64_BR + 7:
+      if (write)
+        ret = __uc_set_brs (uc, (reg - UNW_IA64_BR), 1, val);
+      else
+        ret = __uc_get_brs (uc, (reg - UNW_IA64_BR), 1, val);
+      break;
+
+    case UNW_IA64_PR:
+      if (write)
+        ret = __uc_set_prs (uc, *val);
+      else
+        ret = __uc_get_prs (uc, val);
+      break;
+
+    case UNW_IA64_IP:
+      if (write)
+        ret = __uc_set_ip (uc, *val);
+      else
+        ret = __uc_get_ip (uc, val);
+      break;
+
+    case UNW_IA64_CFM:
+      if (write)
+        ret = __uc_set_cfm (uc, *val);
+      else
+        ret = __uc_get_cfm (uc, val);
+      break;
+
+    case UNW_IA64_FR  ... UNW_IA64_FR + 127:
+    default:
+      ret = EINVAL;
+      break;
+    }
+
+  if (ret != 0)
+    {
+      Debug (1, "failed to %s %s (ret = %d)\n",
+             write ? "write" : "read", unw_regname (reg), ret);
+      return -UNW_EBADREG;
+    }
+
+  if (write)
+    Debug (12, "%s <- %lx\n", unw_regname (reg), *val);
+  else
+    Debug (12, "%s -> %lx\n", unw_regname (reg), *val);
+  return 0;
+}
+
+static int
+access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val,
+              int write, void *arg)
+{
+  ucontext_t *uc = arg;
+  fp_regval_t fp_regval;
+  int ret;
+
+  switch (reg)
+    {
+    case UNW_IA64_FR  ... UNW_IA64_FR + 127:
+      if (write)
+        {
+          memcpy (&fp_regval, val, sizeof (fp_regval));
+          ret = __uc_set_frs (uc, (reg - UNW_IA64_FR), 1, &fp_regval);
+        }
+      else
+        {
+          ret = __uc_get_frs (uc, (reg - UNW_IA64_FR), 1, &fp_regval);
+          memcpy (val, &fp_regval, sizeof (*val));
+        }
+      break;
+
+    default:
+      ret = EINVAL;
+      break;
+    }
+  if (ret != 0)
+    return -UNW_EBADREG;
+
+  return 0;
+}
+
+#else /* !HAVE_SYS_UC_ACCESS_H */
+
+static int
+access_reg (unw_addr_space_t as, unw_regnum_t reg, unw_word_t *val, int write,
+            void *arg)
+{
+  unw_word_t *addr, mask;
+  ucontext_t *uc = arg;
+
+  if (reg >= UNW_IA64_NAT + 4 && reg <= UNW_IA64_NAT + 7)
+    {
+      mask = ((unw_word_t) 1) << (reg - UNW_IA64_NAT);
+      if (write)
+        {
+          if (*val)
+            uc->uc_mcontext.sc_nat |= mask;
+          else
+            uc->uc_mcontext.sc_nat &= ~mask;
+        }
+      else
+        *val = (uc->uc_mcontext.sc_nat & mask) != 0;
+
+      if (write)
+        Debug (12, "%s <- %lx\n", unw_regname (reg), *val);
+      else
+        Debug (12, "%s -> %lx\n", unw_regname (reg), *val);
+      return 0;
+    }
+
+  addr = tdep_uc_addr (uc, reg, NULL);
+  if (!addr)
+    goto badreg;
+
+  if (write)
+    {
+      if (ia64_read_only_reg (addr))
+        {
+          Debug (16, "attempt to write read-only register\n");
+          return -UNW_EREADONLYREG;
+        }
+      *addr = *val;
+      Debug (12, "%s <- %lx\n", unw_regname (reg), *val);
+    }
+  else
+    {
+      *val = *(unw_word_t *) addr;
+      Debug (12, "%s -> %lx\n", unw_regname (reg), *val);
+    }
+  return 0;
+
+ badreg:
+  Debug (1, "bad register number %u\n", reg);
+  return -UNW_EBADREG;
+}
+
+static int
+access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val,
+              int write, void *arg)
+{
+  ucontext_t *uc = arg;
+  unw_fpreg_t *addr;
+
+  if (reg < UNW_IA64_FR || reg >= UNW_IA64_FR + 128)
+    goto badreg;
+
+  addr = tdep_uc_addr (uc, reg, NULL);
+  if (!addr)
+    goto badreg;
+
+  if (write)
+    {
+      if (ia64_read_only_reg (addr))
+        {
+          Debug (16, "attempt to write read-only register\n");
+          return -UNW_EREADONLYREG;
+        }
+      *addr = *val;
+      Debug (12, "%s <- %016lx.%016lx\n",
+             unw_regname (reg), val->raw.bits[1], val->raw.bits[0]);
+    }
+  else
+    {
+      *val = *(unw_fpreg_t *) addr;
+      Debug (12, "%s -> %016lx.%016lx\n",
+             unw_regname (reg), val->raw.bits[1], val->raw.bits[0]);
+    }
+  return 0;
+
+ badreg:
+  Debug (1, "bad register number %u\n", reg);
+  /* attempt to access a non-preserved register */
+  return -UNW_EBADREG;
+}
+
+#endif /* !HAVE_SYS_UC_ACCESS_H */
+
+static int
+get_static_proc_name (unw_addr_space_t as, unw_word_t ip,
+                      char *buf, size_t buf_len, unw_word_t *offp,
+                      void *arg)
+{
+  return _Uelf64_get_proc_name (as, getpid (), ip, buf, buf_len, offp);
+}
+
+HIDDEN void
+ia64_local_addr_space_init (void)
+{
+  memset (&local_addr_space, 0, sizeof (local_addr_space));
+  local_addr_space.big_endian = (__BYTE_ORDER == __BIG_ENDIAN);
+#if defined(__linux)
+  local_addr_space.abi = ABI_LINUX;
+#elif defined(__hpux)
+  local_addr_space.abi = ABI_HPUX;
+#endif
+  local_addr_space.caching_policy = UNWI_DEFAULT_CACHING_POLICY;
+  local_addr_space.acc.find_proc_info = tdep_find_proc_info;
+  local_addr_space.acc.put_unwind_info = put_unwind_info;
+  local_addr_space.acc.get_dyn_info_list_addr = get_dyn_info_list_addr;
+  local_addr_space.acc.access_mem = access_mem;
+  local_addr_space.acc.access_reg = access_reg;
+  local_addr_space.acc.access_fpreg = access_fpreg;
+  local_addr_space.acc.resume = ia64_local_resume;
+  local_addr_space.acc.get_proc_name = get_static_proc_name;
+  unw_flush_cache (&local_addr_space, 0, 0);
+}
+
+#endif /* !UNW_REMOTE_ONLY */
+
+#ifndef UNW_LOCAL_ONLY
+
+HIDDEN int
+ia64_uc_access_reg (struct cursor *c, ia64_loc_t loc, unw_word_t *valp,
+                    int write)
+{
+#ifdef HAVE_SYS_UC_ACCESS_H
+  unw_word_t uc_addr = IA64_GET_AUX_ADDR (loc);
+  ucontext_t *ucp;
+  int ret;
+
+  Debug (16, "%s location %s\n",
+         write ? "writing" : "reading", ia64_strloc (loc));
+
+  if (c->as == unw_local_addr_space)
+    ucp = (ucontext_t *) uc_addr;
+  else
+    {
+      unw_word_t *dst, src;
+
+      /* Need to copy-in ucontext_t first.  */
+      ucp = alloca (sizeof (ucontext_t));
+      if (!ucp)
+        return -UNW_ENOMEM;
+
+      /* For now, there is no non-HP-UX implementation of the
+         uc_access(3) interface.  Because of that, we cannot, e.g.,
+         unwind an HP-UX program from a Linux program.  Should that
+         become possible at some point in the future, the
+         copy-in/copy-out needs to be adjusted to do byte-swapping if
+         necessary. */
+      assert (c->as->big_endian == (__BYTE_ORDER == __BIG_ENDIAN));
+
+      dst = (unw_word_t *) ucp;
+      for (src = uc_addr; src < uc_addr + sizeof (ucontext_t); src += 8)
+        if ((ret = (*c->as->acc.access_mem) (c->as, src, dst++, 0, c->as_arg))
+            < 0)
+          return ret;
+    }
+
+  if (IA64_IS_REG_LOC (loc))
+    ret = access_reg (unw_local_addr_space, IA64_GET_REG (loc), valp, write,
+                      ucp);
+  else
+    {
+      /* Must be an access to the RSE backing store in ucontext_t.  */
+      unw_word_t addr = IA64_GET_ADDR (loc);
+
+      if (write)
+        ret = __uc_set_rsebs (ucp, (uint64_t *) addr, 1, valp);
+      else
+        ret = __uc_get_rsebs (ucp, (uint64_t *) addr, 1, valp);
+      if (ret != 0)
+        ret = -UNW_EBADREG;
+    }
+  if (ret < 0)
+    return ret;
+
+  if (write && c->as != unw_local_addr_space)
+    {
+      /* need to copy-out ucontext_t: */
+      unw_word_t dst, *src = (unw_word_t *) ucp;
+      for (dst = uc_addr; dst < uc_addr + sizeof (ucontext_t); dst += 8)
+        if ((ret = (*c->as->acc.access_mem) (c->as, dst, src++, 1, c->as_arg))
+            < 0)
+          return ret;
+    }
+  return 0;
+#else /* !HAVE_SYS_UC_ACCESS_H */
+  return -UNW_EINVAL;
+#endif /* !HAVE_SYS_UC_ACCESS_H */
+}
+
+HIDDEN int
+ia64_uc_access_fpreg (struct cursor *c, ia64_loc_t loc, unw_fpreg_t *valp,
+                      int write)
+{
+#ifdef HAVE_SYS_UC_ACCESS_H
+  unw_word_t uc_addr = IA64_GET_AUX_ADDR (loc);
+  ucontext_t *ucp;
+  int ret;
+
+  if (c->as == unw_local_addr_space)
+    ucp = (ucontext_t *) uc_addr;
+  else
+    {
+      unw_word_t *dst, src;
+
+      /* Need to copy-in ucontext_t first.  */
+      ucp = alloca (sizeof (ucontext_t));
+      if (!ucp)
+        return -UNW_ENOMEM;
+
+      /* For now, there is no non-HP-UX implementation of the
+         uc_access(3) interface.  Because of that, we cannot, e.g.,
+         unwind an HP-UX program from a Linux program.  Should that
+         become possible at some point in the future, the
+         copy-in/copy-out needs to be adjusted to do byte-swapping if
+         necessary. */
+      assert (c->as->big_endian == (__BYTE_ORDER == __BIG_ENDIAN));
+
+      dst = (unw_word_t *) ucp;
+      for (src = uc_addr; src < uc_addr + sizeof (ucontext_t); src += 8)
+        if ((ret = (*c->as->acc.access_mem) (c->as, src, dst++, 0, c->as_arg))
+            < 0)
+          return ret;
+    }
+
+  if ((ret = access_fpreg (unw_local_addr_space, IA64_GET_REG (loc), valp,
+                           write, ucp)) < 0)
+    return ret;
+
+  if (write && c->as != unw_local_addr_space)
+    {
+      /* need to copy-out ucontext_t: */
+      unw_word_t dst, *src = (unw_word_t *) ucp;
+      for (dst = uc_addr; dst < uc_addr + sizeof (ucontext_t); dst += 8)
+        if ((ret = (*c->as->acc.access_mem) (c->as, dst, src++, 1, c->as_arg))
+            < 0)
+          return ret;
+    }
+  return 0;
+#else /* !HAVE_SYS_UC_ACCESS_H */
+  return -UNW_EINVAL;
+#endif /* !HAVE_SYS_UC_ACCESS_H */
+}
+
+#endif /* UNW_LOCAL_ONLY */
diff --git a/src/third_party/unwind/dist/src/ia64/Ginit_local.c b/src/third_party/unwind/dist/src/ia64/Ginit_local.c
new file mode 100644
index 00000000000..8fe1c679b29
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Ginit_local.c
@@ -0,0 +1,110 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2003, 2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "init.h"
+#include "unwind_i.h"
+
+#ifdef UNW_REMOTE_ONLY
+
+int
+unw_init_local (unw_cursor_t *cursor, unw_context_t *uc)
+{
+  return -UNW_EINVAL;
+}
+
+#else /* !UNW_REMOTE_ONLY */
+
+static inline void
+set_as_arg (struct cursor *c, unw_context_t *uc)
+{
+#if defined(__linux) && defined(__KERNEL__)
+  c->task = current;
+  c->as_arg = &uc->sw;
+#else
+  c->as_arg = uc;
+#endif
+}
+
+static inline int
+get_initial_stack_pointers (struct cursor *c, unw_context_t *uc,
+                            unw_word_t *sp, unw_word_t *bsp)
+{
+#if defined(__linux)
+  unw_word_t sol, bspstore;
+
+#ifdef __KERNEL__
+  sol = (uc->sw.ar_pfs >> 7) & 0x7f;
+  bspstore = uc->sw.ar_bspstore;
+  *sp = uc->ksp;
+# else
+  sol = (uc->uc_mcontext.sc_ar_pfs >> 7) & 0x7f;
+  bspstore = uc->uc_mcontext.sc_ar_bsp;
+  *sp = uc->uc_mcontext.sc_gr[12];
+# endif
+  *bsp = rse_skip_regs (bspstore, -sol);
+#elif defined(__hpux)
+  int ret;
+
+  if ((ret = ia64_get (c, IA64_REG_LOC (c, UNW_IA64_GR + 12), sp)) < 0
+      || (ret = ia64_get (c, IA64_REG_LOC (c, UNW_IA64_AR_BSP), bsp)) < 0)
+    return ret;
+#else
+# error Fix me.
+#endif
+  return 0;
+}
+
+int
+unw_init_local (unw_cursor_t *cursor, unw_context_t *uc)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  unw_word_t sp, bsp;
+  int ret;
+
+  if (!tdep_init_done)
+    tdep_init ();
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  c->as = unw_local_addr_space;
+  set_as_arg (c, uc);
+
+  if ((ret = get_initial_stack_pointers (c, uc, &sp, &bsp)) < 0)
+    return ret;
+
+  Debug (4, "initial bsp=%lx, sp=%lx\n", bsp, sp);
+
+  if ((ret = common_init (c, sp, bsp)) < 0)
+    return ret;
+
+#ifdef __hpux
+  /* On HP-UX, the context created by getcontext() points to the
+     getcontext() system call stub.  Step over it: */
+  ret = unw_step (cursor);
+#endif
+  return ret;
+}
+
+#endif /* !UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/dist/src/ia64/Ginit_remote.c b/src/third_party/unwind/dist/src/ia64/Ginit_remote.c
new file mode 100644
index 00000000000..b570c7eab39
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Ginit_remote.c
@@ -0,0 +1,61 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2002, 2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "init.h"
+#include "unwind_i.h"
+
+int
+unw_init_remote (unw_cursor_t *cursor, unw_addr_space_t as, void *as_arg)
+{
+#ifdef UNW_LOCAL_ONLY
+  return -UNW_EINVAL;
+#else /* !UNW_LOCAL_ONLY */
+  struct cursor *c = (struct cursor *) cursor;
+  unw_word_t sp, bsp;
+  int ret;
+
+  if (!tdep_init_done)
+    tdep_init ();
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  if (as == unw_local_addr_space)
+    /* This special-casing is unfortunate and shouldn't be needed;
+       however, both Linux and HP-UX need to adjust the context a bit
+       before it's usable.  Try to think of a cleaner way of doing
+       this.  Not sure it's possible though, as long as we want to be
+       able to use the context returned by getcontext() et al.  */
+    return unw_init_local (cursor, as_arg);
+
+  c->as = as;
+  c->as_arg = as_arg;
+
+  if ((ret = ia64_get (c, IA64_REG_LOC (c, UNW_IA64_GR + 12), &sp)) < 0
+      || (ret = ia64_get (c, IA64_REG_LOC (c, UNW_IA64_AR_BSP), &bsp)) < 0)
+    return ret;
+
+  return common_init (c, sp, bsp);
+#endif /* !UNW_LOCAL_ONLY */
+}
diff --git a/src/third_party/unwind/dist/src/ia64/Ginstall_cursor.S b/src/third_party/unwind/dist/src/ia64/Ginstall_cursor.S
new file mode 100644
index 00000000000..6fb4401faa2
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Ginstall_cursor.S
@@ -0,0 +1,348 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2003 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "ucontext_i.h"
+
+#ifdef UNW_LOCAL_ONLY
+# include "Lcursor_i.h"
+# define ia64_install_cursor	_ULia64_install_cursor
+#else
+# include "Gcursor_i.h"
+# define ia64_install_cursor	_Uia64_install_cursor
+#endif
+
+#define SYS_sigreturn	1181
+
+#ifndef UNW_REMOTE_ONLY
+
+/*  ia64_install_cursor (const cursor *c, long pri_unat, long *extra,
+			 long bspstore, long dirty_size, long *dirty_partition,
+			 long dirty_rnat)
+
+  Restores the machine-state represented by C and thereby resumes execution
+  in that frame.  If the frame or one of its descendants was interrupted
+  by a signal, all registers are restored (including the signal mask).
+  Otherwise, only the preserved registers, the global-pointer (r1), and
+  the exception-arguments (r15-r18) are restored.  */
+
+#define pRet	p6
+#define pSig	p7
+
+	.align 32
+	.hidden ia64_install_cursor
+	.global ia64_install_cursor
+	.proc ia64_install_cursor
+ia64_install_cursor:
+	alloc r3 = ar.pfs, 7, 0, 0, 0
+	invala
+	add r2 = FR_LOC_OFF, in0
+	;;
+
+	ld8 r16 = [r2], LOC_SIZE	// r16 = loc[IA64_REG_FR16]
+	mov.m r10 = ar.rsc		// (ar.rsc: ~ 12 cycle latency)
+	add r3 = FR_LOC_OFF + 16, in0
+	;;
+
+	ld8 r17 = [r2], 2*LOC_SIZE	// r17 = loc[IA64_REG_FR17]
+	ld8 r18 = [r3], 2*LOC_SIZE	// r18 = loc[IA64_REG_FR18]
+	and r16 = -4, r16
+	;;
+
+	ld8 r19 = [r2], 2*LOC_SIZE	// r19 = loc[IA64_REG_FR19]
+	ld8 r20 = [r3], 2*LOC_SIZE	// r20 = loc[IA64_REG_FR20]
+	and r17 = -4, r17
+	;;
+
+	ldf.fill f16 = [r16]		// f16 restored (don't touch no more)
+	ldf.fill f17 = [r17]		// f17 restored (don't touch no more)
+	and r18 = -4, r18
+
+	ld8 r21 = [r2], 2*LOC_SIZE	// r21 = loc[IA64_REG_FR21]
+	ld8 r22 = [r3], 2*LOC_SIZE	// r22 = loc[IA64_REG_FR22]
+	and r19 = -4, r19
+	;;
+
+	ldf.fill f18 = [r18]		// f18 restored (don't touch no more)
+	ldf.fill f19 = [r19]		// f19 restored (don't touch no more)
+	and r20 = -4, r20
+
+	ld8 r23 = [r2], 2*LOC_SIZE	// r23 = loc[IA64_REG_FR23]
+	ld8 r24 = [r3], 2*LOC_SIZE	// r24 = loc[IA64_REG_FR24]
+	and r21 = -4, r21
+	;;
+
+	ldf.fill f20 = [r20]		// f20 restored (don't touch no more)
+	ldf.fill f21 = [r21]		// f21 restored (don't touch no more)
+	and r22 = -4, r22
+
+	ld8 r25 = [r2], 2*LOC_SIZE	// r25 = loc[IA64_REG_FR25]
+	ld8 r26 = [r3], 2*LOC_SIZE	// r26 = loc[IA64_REG_FR26]
+	and r23 = -4, r23
+	;;
+
+	ldf.fill f22 = [r22]		// f22 restored (don't touch no more)
+	ldf.fill f23 = [r23]		// f23 restored (don't touch no more)
+	and r24 = -4, r24
+
+	ld8 r27 = [r2], 2*LOC_SIZE	// r27 = loc[IA64_REG_FR27]
+	ld8 r28 = [r3], 2*LOC_SIZE	// r28 = loc[IA64_REG_FR28]
+	and r25 = -4, r25
+	;;
+
+	ldf.fill f24 = [r24]		// f24 restored (don't touch no more)
+	ldf.fill f25 = [r25]		// f25 restored (don't touch no more)
+	and r26 = -4, r26
+
+	ld8 r29 = [r2], 2*LOC_SIZE	// r29 = loc[IA64_REG_FR29]
+	ld8 r30 = [r3], 2*LOC_SIZE	// r30 = loc[IA64_REG_FR30]
+	and r27 = -4, r27
+	;;
+
+	ldf.fill f26 = [r26]		// f26 restored (don't touch no more)
+	ldf.fill f27 = [r27]		// f27 restored (don't touch no more)
+	and r28 = -4, r28
+
+	ld8 r31 = [r2]			// r31 = loc[IA64_REG_FR31]
+	mov.m ar.unat = in1
+	and r29 = -4, r29
+	;;
+
+	ldf.fill f28 = [r28]		// f28 restored (don't touch no more)
+	ldf.fill f29 = [r29]		// f29 restored (don't touch no more)
+	and r30 = -4, r30
+
+	ld8 r1 = [in2], 8		// gp restored (don't touch no more)
+	add r8 = SIGCONTEXT_ADDR_OFF, in0
+	and r31 = -4, r31
+	;;
+
+	ld8 r8 = [r8]			// r8 = sigcontext_addr
+	and r11 = 0x1c, r10		// clear all but rsc.be and rsc.pl
+	add r2 = PFS_LOC_OFF, in0
+
+	ldf.fill f30 = [r30]		// f30 restored (don't touch no more)
+	ldf.fill f31 = [r31]		// f31 restored (don't touch no more)
+	add r3 = 8, in2
+	;;
+
+	ld8.fill r4 = [in2], 16		// r4 restored (don't touch no more)
+	ld8.fill r5 = [r3], 16		// r5 restored (don't touch no more)
+	cmp.eq pRet, pSig = r0, r8	// sigcontext_addr == NULL?
+	;;
+	ld8.fill r6 = [in2], 16		// r6 restored (don't touch no more)
+	ld8.fill r7 = [r3]		// r7 restored (don't touch no more)
+	add r3 = IP_OFF, in0
+	;;
+
+	ld8 r14 = [r2], (B1_LOC_OFF - PFS_LOC_OFF)	// r14 = pfs_loc
+	ld8 r15 = [r3]			// r15 = ip
+	add r3 = (B2_LOC_OFF - IP_OFF), r3
+	;;
+
+	ld8 r16 = [r2], (B3_LOC_OFF - B1_LOC_OFF)	// r16 = b1_loc
+	ld8 r17= [r3], (B4_LOC_OFF - B2_LOC_OFF)	// r17 = b2_loc
+	and r14 = -4, r14
+	;;
+
+	ld8 r18 = [r2], (B5_LOC_OFF - B3_LOC_OFF)	// r18 = b3_loc
+	ld8 r19 = [r3], (F2_LOC_OFF - B4_LOC_OFF)	// r19 = b4_loc
+	and r16 = -4, r16
+	;;
+
+	ld8 r20 = [r2], (F3_LOC_OFF - B5_LOC_OFF)	// r20 = b5_loc
+	ld8 r21 = [r3], (F4_LOC_OFF - F2_LOC_OFF)	// r21 = f2_loc
+	and r17 = -4, r17
+	;;
+
+	ld8 r16 = [r16]			// r16 = *b1_loc
+	ld8 r17 = [r17]			// r17 = *b2_loc
+	and r18 = -4, r18
+
+	ld8 r22 = [r2], (F5_LOC_OFF - F3_LOC_OFF)	// r21 = f3_loc
+	ld8 r23 = [r3], (UNAT_LOC_OFF - F4_LOC_OFF)	// r22 = f4_loc
+	and r19 = -4, r19
+	;;
+
+	ld8 r18 = [r18]			// r18 = *b3_loc
+	ld8 r19 = [r19]			// r19 = *b4_loc
+	and r20 = -4, r20
+
+	ld8 r24 = [r2], (LC_LOC_OFF - F5_LOC_OFF)	// r24 = f5_loc
+	ld8 r25 = [r3], (FPSR_LOC_OFF - UNAT_LOC_OFF)	// r25 = unat_loc
+	and r21 = -4, r21
+	;;
+
+	and r22 = -4, r22
+	and r23 = -4, r23
+	and r24 = -4, r24
+
+	ld8 r20 = [r20]			// r20 = *b5_loc
+	ldf.fill f2 = [r21]		// f2 restored (don't touch no more)
+	mov b1 = r16			// b1 restored (don't touch no more)
+	;;
+
+	ldf.fill f3 = [r22]		// f3 restored (don't touch no more)
+	ldf.fill f4 = [r23]		// f4 restored (don't touch no more)
+	mov b2 = r17			// b2 restored (don't touch no more)
+
+	ld8 r26 = [r2], (RNAT_LOC_OFF - LC_LOC_OFF)	// r26 = lc_loc
+	ld8 r27 = [r3]			// r27 = fpsr_loc
+	and r25 = -4, r25
+
+	add r3 = (PSP_OFF - FPSR_LOC_OFF), r3
+	nop 0
+	nop 0
+	;;
+
+	ldf.fill f5 = [r24]		// f5 restored (don't touch no more)
+(pRet)	ld8 r25 = [r25]			// r25 = *unat_loc
+	mov b3 = r18			// b3 restored (don't touch no more)
+
+	ld8 r28 = [r2], (BSP_OFF - RNAT_LOC_OFF)	// r28 = rnat_loc
+	ld8 r29 = [r3], (PR_OFF - PSP_OFF)		// r29 = sp
+	mov b4 = r19			// b4 restored (don't touch no more)
+
+	and r26 = -4, r26
+	and r27 = -4, r27
+	mov b5 = r20			// b5 restored (don't touch no more)
+	;;
+
+	ld8 r26 = [r26]			// r26 = *lc_loc
+	ld8 r27 = [r27]			// r27 = *fpsr_loc
+	and r28 = -4, r28
+
+	mov r30 = in3			// make backup-copy of new bsp
+	ld8 r31 = [r3]			// r31 = pr
+	mov rp = r15
+	;;
+
+	ld8 r28 = [r28]			// r28 = rnat
+	mov.m ar.rsc = r11		// put RSE into enforced lazy mode
+	mov.i ar.lc = r26		// lc restored (don't touch no more)
+	;;
+
+	loadrs				// drop dirty partition
+	mov r9 = in2			// make backup-copy of &extra[r16]
+	cmp.eq p8, p0 = in4, r0		// dirty-size == 0?
+(p8)	br.cond.dpnt.many .skip_load_dirty
+
+	mov r2 = in4			// make backup-copy of dirty_size
+	mov r15 = in5			// make backup-copy of dirty_partition
+	mov r16 = in6			// make backup-copy of dirty_rnat
+	;;
+
+	alloc r3 = ar.pfs, 0, 0, 0, 0	// drop register frame
+	dep r11 = r2, r11, 16, 16
+	;;
+	mov.m ar.bspstore = r15
+	;;
+	mov.m ar.rnat = r16
+	mov.m ar.rsc = r11		// 14 cycles latency to loadrs
+	;;
+	loadrs				// loadup new dirty partition
+	;;
+
+.skip_load_dirty:
+	mov.m ar.bspstore = r30		// restore register backing-store
+	add r3 = 8, r9			// r3 = &extra[r16]
+	;;
+
+(pRet)	mov.m ar.fpsr = r27		// fpsr restored (don't touch no more)
+	mov.m ar.rnat = r28
+(pSig)	br.cond.dpnt.many .next
+
+/****** Return via br.ret: */
+
+	ld8 r14 = [r14]			// r14 = *pfs_loc
+	ld8 r15 = [r9], 16		// r15 restored (don't touch no more)
+	mov pr = r31, -1		// pr restored (don't touch no more)
+	;;
+
+	ld8 r16 = [r3], 16		// r16 restored (don't touch no more)
+	ld8 r17 = [r9]			// r17 restored (don't touch no more)
+	nop.i 0
+	;;
+
+	ld8 r18 = [r3]			// r18 restored (don't touch no more)
+	mov.m ar.rsc = r10		// restore original ar.rsc
+	mov sp = r29
+
+	mov.m ar.unat = r25		// unat restored (don't touch no more)
+	mov.i ar.pfs = r14
+	br.ret.sptk.many rp
+	;;
+
+/****** Return via sigreturn(): */
+
+.next:	mov.m ar.rsc = r10		// restore original ar.rsc
+	add r2 = (SC_FR + 6*16), r8
+	add r3 = (SC_FR + 7*16), r8
+	;;
+
+	ldf.fill f6 = [r2], 32
+	ldf.fill f7 = [r3], 32
+	nop 0
+	;;
+
+	ldf.fill f8 = [r2], 32
+	ldf.fill f9 = [r3], 32
+	nop 0
+	;;
+
+	ldf.fill f10 = [r2], 32
+	ldf.fill f11 = [r3], 32
+	nop 0
+	;;
+
+	ldf.fill f12 = [r2], 32
+	ldf.fill f13 = [r3], 32
+	nop 0
+	;;
+
+	ldf.fill f14 = [r2], 32
+	ldf.fill f15 = [r3], 32
+	mov sp = r29
+	;;
+
+#if NEW_SYSCALL
+	add r2 = 8, tp;;
+	ld8 r2 = [r2]
+	mov r15 = SYS_sigreturn
+	mov b7 = r2
+	br.call.sptk.many b6 = b7
+	;;
+#else
+	mov r15 = SYS_sigreturn
+	break 0x100000
+#endif
+	break 0				// bug out if sigreturn() returns
+
+	.endp ia64_install_cursor
+
+#endif /* !UNW_REMOTE_ONLY */
+#ifdef __linux__
+	/* We do not need executable stack.  */
+	.section	.note.GNU-stack,"",@progbits
+#endif
diff --git a/src/third_party/unwind/dist/src/ia64/Gis_signal_frame.c b/src/third_party/unwind/dist/src/ia64/Gis_signal_frame.c
new file mode 100644
index 00000000000..e268a062998
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Gis_signal_frame.c
@@ -0,0 +1,54 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2002 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_is_signal_frame (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  struct ia64_state_record sr;
+  int ret;
+
+  /* Crude and slow, but we need to peek ahead into the unwind
+     descriptors to find out if the current IP is inside the signal
+     trampoline.  */
+  ret = ia64_fetch_proc_info (c, c->ip, 1);
+  if (ret < 0)
+    return ret;
+
+  ret = ia64_create_state_record (c, &sr);
+  if (ret < 0)
+    return ret;
+
+  /* For now, we assume that any non-zero abi marker implies a signal frame.
+     This should get us pretty far.  */
+  ret = (sr.abi_marker != 0);
+
+  ia64_free_state_record (&sr);
+
+  Debug (1, "(cursor=%p, ip=0x%016lx) -> %d\n", c, c->ip, ret);
+  return ret;
+}
diff --git a/src/third_party/unwind/dist/src/ia64/Gparser.c b/src/third_party/unwind/dist/src/ia64/Gparser.c
new file mode 100644
index 00000000000..b1f0f4a1182
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Gparser.c
@@ -0,0 +1,1131 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+/* forward declaration: */
+static int create_state_record_for (struct cursor *c,
+                                    struct ia64_state_record *sr,
+                                    unw_word_t ip);
+
+typedef unsigned long unw_word;
+
+#define alloc_reg_state()       (mempool_alloc (&unw.reg_state_pool))
+#define free_reg_state(rs)      (mempool_free (&unw.reg_state_pool, rs))
+#define alloc_labeled_state()   (mempool_alloc (&unw.labeled_state_pool))
+#define free_labeled_state(s)   (mempool_free (&unw.labeled_state_pool, s))
+
+/* Routines to manipulate the state stack.  */
+
+static inline void
+push (struct ia64_state_record *sr)
+{
+  struct ia64_reg_state *rs;
+
+  rs = alloc_reg_state ();
+  if (!rs)
+    {
+      print_error ("libunwind: cannot stack reg state!\n");
+      return;
+    }
+  memcpy (rs, &sr->curr, sizeof (*rs));
+  sr->curr.next = rs;
+}
+
+static void
+pop (struct ia64_state_record *sr)
+{
+  struct ia64_reg_state *rs = sr->curr.next;
+
+  if (!rs)
+    {
+      print_error ("libunwind: stack underflow!\n");
+      return;
+    }
+  memcpy (&sr->curr, rs, sizeof (*rs));
+  free_reg_state (rs);
+}
+
+/* Make a copy of the state stack.  Non-recursive to avoid stack overflows.  */
+static struct ia64_reg_state *
+dup_state_stack (struct ia64_reg_state *rs)
+{
+  struct ia64_reg_state *copy, *prev = NULL, *first = NULL;
+
+  while (rs)
+    {
+      copy = alloc_reg_state ();
+      if (!copy)
+        {
+          print_error ("unwind.dup_state_stack: out of memory\n");
+          return NULL;
+        }
+      memcpy (copy, rs, sizeof (*copy));
+      if (first)
+        prev->next = copy;
+      else
+        first = copy;
+      rs = rs->next;
+      prev = copy;
+    }
+  return first;
+}
+
+/* Free all stacked register states (but not RS itself).  */
+static void
+free_state_stack (struct ia64_reg_state *rs)
+{
+  struct ia64_reg_state *p, *next;
+
+  for (p = rs->next; p != NULL; p = next)
+    {
+      next = p->next;
+      free_reg_state (p);
+    }
+  rs->next = NULL;
+}
+
+/* Unwind decoder routines */
+
+static enum ia64_pregnum CONST_ATTR
+decode_abreg (unsigned char abreg, int memory)
+{
+  switch (abreg)
+    {
+    case 0x04 ... 0x07:
+      return IA64_REG_R4 + (abreg - 0x04);
+    case 0x22 ... 0x25:
+      return IA64_REG_F2 + (abreg - 0x22);
+    case 0x30 ... 0x3f:
+      return IA64_REG_F16 + (abreg - 0x30);
+    case 0x41 ... 0x45:
+      return IA64_REG_B1 + (abreg - 0x41);
+    case 0x60:
+      return IA64_REG_PR;
+    case 0x61:
+      return IA64_REG_PSP;
+    case 0x62:
+      return memory ? IA64_REG_PRI_UNAT_MEM : IA64_REG_PRI_UNAT_GR;
+    case 0x63:
+      return IA64_REG_IP;
+    case 0x64:
+      return IA64_REG_BSP;
+    case 0x65:
+      return IA64_REG_BSPSTORE;
+    case 0x66:
+      return IA64_REG_RNAT;
+    case 0x67:
+      return IA64_REG_UNAT;
+    case 0x68:
+      return IA64_REG_FPSR;
+    case 0x69:
+      return IA64_REG_PFS;
+    case 0x6a:
+      return IA64_REG_LC;
+    default:
+      break;
+    }
+  Dprintf ("libunwind: bad abreg=0x%x\n", abreg);
+  return IA64_REG_LC;
+}
+
+static void
+set_reg (struct ia64_reg_info *reg, enum ia64_where where, int when,
+         unsigned long val)
+{
+  reg->val = val;
+  reg->where = where;
+  if (reg->when == IA64_WHEN_NEVER)
+    reg->when = when;
+}
+
+static void
+alloc_spill_area (unsigned long *offp, unsigned long regsize,
+                  struct ia64_reg_info *lo, struct ia64_reg_info *hi)
+{
+  struct ia64_reg_info *reg;
+
+  for (reg = hi; reg >= lo; --reg)
+    {
+      if (reg->where == IA64_WHERE_SPILL_HOME)
+        {
+          reg->where = IA64_WHERE_PSPREL;
+          *offp -= regsize;
+          reg->val = *offp;
+        }
+    }
+}
+
+static inline void
+spill_next_when (struct ia64_reg_info **regp, struct ia64_reg_info *lim,
+                 unw_word t)
+{
+  struct ia64_reg_info *reg;
+
+  for (reg = *regp; reg <= lim; ++reg)
+    {
+      if (reg->where == IA64_WHERE_SPILL_HOME)
+        {
+          reg->when = t;
+          *regp = reg + 1;
+          return;
+        }
+    }
+  Dprintf ("libunwind: excess spill!\n");
+}
+
+static inline void
+finish_prologue (struct ia64_state_record *sr)
+{
+  struct ia64_reg_info *reg;
+  unsigned long off;
+  int i;
+
+  /* First, resolve implicit register save locations (see Section
+     "11.4.2.3 Rules for Using Unwind Descriptors", rule 3). */
+  for (i = 0; i < (int) ARRAY_SIZE (unw.save_order); ++i)
+    {
+      reg = sr->curr.reg + unw.save_order[i];
+      if (reg->where == IA64_WHERE_GR_SAVE)
+        {
+          reg->where = IA64_WHERE_GR;
+          reg->val = sr->gr_save_loc++;
+        }
+    }
+
+  /* Next, compute when the fp, general, and branch registers get
+     saved.  This must come before alloc_spill_area() because we need
+     to know which registers are spilled to their home locations.  */
+
+  if (sr->imask)
+    {
+      unsigned char kind, mask = 0, *cp = sr->imask;
+      unsigned long t;
+      static const unsigned char limit[3] =
+        {
+          IA64_REG_F31, IA64_REG_R7, IA64_REG_B5
+        };
+      struct ia64_reg_info *(regs[3]);
+
+      regs[0] = sr->curr.reg + IA64_REG_F2;
+      regs[1] = sr->curr.reg + IA64_REG_R4;
+      regs[2] = sr->curr.reg + IA64_REG_B1;
+
+      for (t = 0; (int) t < sr->region_len; ++t)
+        {
+          if ((t & 3) == 0)
+            mask = *cp++;
+          kind = (mask >> 2 * (3 - (t & 3))) & 3;
+          if (kind > 0)
+            spill_next_when (&regs[kind - 1], sr->curr.reg + limit[kind - 1],
+                             sr->region_start + t);
+        }
+    }
+
+  /* Next, lay out the memory stack spill area.  */
+
+  if (sr->any_spills)
+    {
+      off = sr->spill_offset;
+      alloc_spill_area (&off, 16, sr->curr.reg + IA64_REG_F2,
+                        sr->curr.reg + IA64_REG_F31);
+      alloc_spill_area (&off, 8, sr->curr.reg + IA64_REG_B1,
+                        sr->curr.reg + IA64_REG_B5);
+      alloc_spill_area (&off, 8, sr->curr.reg + IA64_REG_R4,
+                        sr->curr.reg + IA64_REG_R7);
+    }
+}
+
+/* Region header descriptors.  */
+
+static void
+desc_prologue (int body, unw_word rlen, unsigned char mask,
+               unsigned char grsave, struct ia64_state_record *sr)
+{
+  int i, region_start;
+
+  if (!(sr->in_body || sr->first_region))
+    finish_prologue (sr);
+  sr->first_region = 0;
+
+  /* check if we're done: */
+  if (sr->when_target < sr->region_start + sr->region_len)
+    {
+      sr->done = 1;
+      return;
+    }
+
+  region_start = sr->region_start + sr->region_len;
+
+  for (i = 0; i < sr->epilogue_count; ++i)
+    pop (sr);
+  sr->epilogue_count = 0;
+  sr->when_sp_restored = IA64_WHEN_NEVER;
+
+  sr->region_start = region_start;
+  sr->region_len = rlen;
+  sr->in_body = body;
+
+  if (!body)
+    {
+      push (sr);
+
+      if (mask)
+        for (i = 0; i < 4; ++i)
+          {
+            if (mask & 0x8)
+              set_reg (sr->curr.reg + unw.save_order[i], IA64_WHERE_GR,
+                       sr->region_start + sr->region_len - 1, grsave++);
+            mask <<= 1;
+          }
+      sr->gr_save_loc = grsave;
+      sr->any_spills = 0;
+      sr->imask = 0;
+      sr->spill_offset = 0x10;  /* default to psp+16 */
+    }
+}
+
+/* Prologue descriptors.  */
+
+static inline void
+desc_abi (unsigned char abi, unsigned char context,
+          struct ia64_state_record *sr)
+{
+  sr->abi_marker = (abi << 8) | context;
+}
+
+static inline void
+desc_br_gr (unsigned char brmask, unsigned char gr,
+            struct ia64_state_record *sr)
+{
+  int i;
+
+  for (i = 0; i < 5; ++i)
+    {
+      if (brmask & 1)
+        set_reg (sr->curr.reg + IA64_REG_B1 + i, IA64_WHERE_GR,
+                 sr->region_start + sr->region_len - 1, gr++);
+      brmask >>= 1;
+    }
+}
+
+static inline void
+desc_br_mem (unsigned char brmask, struct ia64_state_record *sr)
+{
+  int i;
+
+  for (i = 0; i < 5; ++i)
+    {
+      if (brmask & 1)
+        {
+          set_reg (sr->curr.reg + IA64_REG_B1 + i, IA64_WHERE_SPILL_HOME,
+                   sr->region_start + sr->region_len - 1, 0);
+          sr->any_spills = 1;
+        }
+      brmask >>= 1;
+    }
+}
+
+static inline void
+desc_frgr_mem (unsigned char grmask, unw_word frmask,
+               struct ia64_state_record *sr)
+{
+  int i;
+
+  for (i = 0; i < 4; ++i)
+    {
+      if ((grmask & 1) != 0)
+        {
+          set_reg (sr->curr.reg + IA64_REG_R4 + i, IA64_WHERE_SPILL_HOME,
+                   sr->region_start + sr->region_len - 1, 0);
+          sr->any_spills = 1;
+        }
+      grmask >>= 1;
+    }
+  for (i = 0; i < 20; ++i)
+    {
+      if ((frmask & 1) != 0)
+        {
+          int base = (i < 4) ? IA64_REG_F2 : IA64_REG_F16 - 4;
+          set_reg (sr->curr.reg + base + i, IA64_WHERE_SPILL_HOME,
+                   sr->region_start + sr->region_len - 1, 0);
+          sr->any_spills = 1;
+        }
+      frmask >>= 1;
+    }
+}
+
+static inline void
+desc_fr_mem (unsigned char frmask, struct ia64_state_record *sr)
+{
+  int i;
+
+  for (i = 0; i < 4; ++i)
+    {
+      if ((frmask & 1) != 0)
+        {
+          set_reg (sr->curr.reg + IA64_REG_F2 + i, IA64_WHERE_SPILL_HOME,
+                   sr->region_start + sr->region_len - 1, 0);
+          sr->any_spills = 1;
+        }
+      frmask >>= 1;
+    }
+}
+
+static inline void
+desc_gr_gr (unsigned char grmask, unsigned char gr,
+            struct ia64_state_record *sr)
+{
+  int i;
+
+  for (i = 0; i < 4; ++i)
+    {
+      if ((grmask & 1) != 0)
+        set_reg (sr->curr.reg + IA64_REG_R4 + i, IA64_WHERE_GR,
+                 sr->region_start + sr->region_len - 1, gr++);
+      grmask >>= 1;
+    }
+}
+
+static inline void
+desc_gr_mem (unsigned char grmask, struct ia64_state_record *sr)
+{
+  int i;
+
+  for (i = 0; i < 4; ++i)
+    {
+      if ((grmask & 1) != 0)
+        {
+          set_reg (sr->curr.reg + IA64_REG_R4 + i, IA64_WHERE_SPILL_HOME,
+                   sr->region_start + sr->region_len - 1, 0);
+          sr->any_spills = 1;
+        }
+      grmask >>= 1;
+    }
+}
+
+static inline void
+desc_mem_stack_f (unw_word t, unw_word size, struct ia64_state_record *sr)
+{
+  set_reg (sr->curr.reg + IA64_REG_PSP, IA64_WHERE_NONE,
+           sr->region_start + MIN ((int) t, sr->region_len - 1), 16 * size);
+}
+
+static inline void
+desc_mem_stack_v (unw_word t, struct ia64_state_record *sr)
+{
+  sr->curr.reg[IA64_REG_PSP].when =
+    sr->region_start + MIN ((int) t, sr->region_len - 1);
+}
+
+static inline void
+desc_reg_gr (unsigned char reg, unsigned char dst,
+             struct ia64_state_record *sr)
+{
+  set_reg (sr->curr.reg + reg, IA64_WHERE_GR,
+           sr->region_start + sr->region_len - 1, dst);
+}
+
+static inline void
+desc_reg_psprel (unsigned char reg, unw_word pspoff,
+                 struct ia64_state_record *sr)
+{
+  set_reg (sr->curr.reg + reg, IA64_WHERE_PSPREL,
+           sr->region_start + sr->region_len - 1, 0x10 - 4 * pspoff);
+}
+
+static inline void
+desc_reg_sprel (unsigned char reg, unw_word spoff,
+                struct ia64_state_record *sr)
+{
+  set_reg (sr->curr.reg + reg, IA64_WHERE_SPREL,
+           sr->region_start + sr->region_len - 1, 4 * spoff);
+}
+
+static inline void
+desc_rp_br (unsigned char dst, struct ia64_state_record *sr)
+{
+  sr->return_link_reg = dst;
+}
+
+static inline void
+desc_reg_when (unsigned char regnum, unw_word t, struct ia64_state_record *sr)
+{
+  struct ia64_reg_info *reg = sr->curr.reg + regnum;
+
+  if (reg->where == IA64_WHERE_NONE)
+    reg->where = IA64_WHERE_GR_SAVE;
+  reg->when = sr->region_start + MIN ((int) t, sr->region_len - 1);
+}
+
+static inline void
+desc_spill_base (unw_word pspoff, struct ia64_state_record *sr)
+{
+  sr->spill_offset = 0x10 - 4 * pspoff;
+}
+
+static inline unsigned char *
+desc_spill_mask (unsigned char *imaskp, struct ia64_state_record *sr)
+{
+  sr->imask = imaskp;
+  return imaskp + (2 * sr->region_len + 7) / 8;
+}
+
+/* Body descriptors.  */
+
+static inline void
+desc_epilogue (unw_word t, unw_word ecount, struct ia64_state_record *sr)
+{
+  sr->when_sp_restored = sr->region_start + sr->region_len - 1 - t;
+  sr->epilogue_count = ecount + 1;
+}
+
+static inline void
+desc_copy_state (unw_word label, struct ia64_state_record *sr)
+{
+  struct ia64_labeled_state *ls;
+
+  for (ls = sr->labeled_states; ls; ls = ls->next)
+    {
+      if (ls->label == label)
+        {
+          free_state_stack (&sr->curr);
+          memcpy (&sr->curr, &ls->saved_state, sizeof (sr->curr));
+          sr->curr.next = dup_state_stack (ls->saved_state.next);
+          return;
+        }
+    }
+  print_error ("libunwind: failed to find labeled state\n");
+}
+
+static inline void
+desc_label_state (unw_word label, struct ia64_state_record *sr)
+{
+  struct ia64_labeled_state *ls;
+
+  ls = alloc_labeled_state ();
+  if (!ls)
+    {
+      print_error ("unwind.desc_label_state(): out of memory\n");
+      return;
+    }
+  ls->label = label;
+  memcpy (&ls->saved_state, &sr->curr, sizeof (ls->saved_state));
+  ls->saved_state.next = dup_state_stack (sr->curr.next);
+
+  /* insert into list of labeled states: */
+  ls->next = sr->labeled_states;
+  sr->labeled_states = ls;
+}
+
+/* General descriptors.  */
+
+static inline int
+desc_is_active (unsigned char qp, unw_word t, struct ia64_state_record *sr)
+{
+  if (sr->when_target <= sr->region_start + MIN ((int) t, sr->region_len - 1))
+    return 0;
+  if (qp > 0)
+    {
+      if ((sr->pr_val & ((unw_word_t) 1 << qp)) == 0)
+        return 0;
+      sr->pr_mask |= ((unw_word_t) 1 << qp);
+    }
+  return 1;
+}
+
+static inline void
+desc_restore_p (unsigned char qp, unw_word t, unsigned char abreg,
+                struct ia64_state_record *sr)
+{
+  struct ia64_reg_info *r;
+
+  if (!desc_is_active (qp, t, sr))
+    return;
+
+  r = sr->curr.reg + decode_abreg (abreg, 0);
+  r->where = IA64_WHERE_NONE;
+  r->when = IA64_WHEN_NEVER;
+  r->val = 0;
+}
+
+static inline void
+desc_spill_reg_p (unsigned char qp, unw_word t, unsigned char abreg,
+                  unsigned char x, unsigned char ytreg,
+                  struct ia64_state_record *sr)
+{
+  enum ia64_where where = IA64_WHERE_GR;
+  struct ia64_reg_info *r;
+
+  if (!desc_is_active (qp, t, sr))
+    return;
+
+  if (x)
+    where = IA64_WHERE_BR;
+  else if (ytreg & 0x80)
+    where = IA64_WHERE_FR;
+
+  r = sr->curr.reg + decode_abreg (abreg, 0);
+  r->where = where;
+  r->when = sr->region_start + MIN ((int) t, sr->region_len - 1);
+  r->val = (ytreg & 0x7f);
+}
+
+static inline void
+desc_spill_psprel_p (unsigned char qp, unw_word t, unsigned char abreg,
+                     unw_word pspoff, struct ia64_state_record *sr)
+{
+  struct ia64_reg_info *r;
+
+  if (!desc_is_active (qp, t, sr))
+    return;
+
+  r = sr->curr.reg + decode_abreg (abreg, 1);
+  r->where = IA64_WHERE_PSPREL;
+  r->when = sr->region_start + MIN ((int) t, sr->region_len - 1);
+  r->val = 0x10 - 4 * pspoff;
+}
+
+static inline void
+desc_spill_sprel_p (unsigned char qp, unw_word t, unsigned char abreg,
+                    unw_word spoff, struct ia64_state_record *sr)
+{
+  struct ia64_reg_info *r;
+
+  if (!desc_is_active (qp, t, sr))
+    return;
+
+  r = sr->curr.reg + decode_abreg (abreg, 1);
+  r->where = IA64_WHERE_SPREL;
+  r->when = sr->region_start + MIN ((int) t, sr->region_len - 1);
+  r->val = 4 * spoff;
+}
+
+#define UNW_DEC_BAD_CODE(code)                                          \
+        print_error ("libunwind: unknown code encountered\n")
+
+/* Register names.  */
+#define UNW_REG_BSP             IA64_REG_BSP
+#define UNW_REG_BSPSTORE        IA64_REG_BSPSTORE
+#define UNW_REG_FPSR            IA64_REG_FPSR
+#define UNW_REG_LC              IA64_REG_LC
+#define UNW_REG_PFS             IA64_REG_PFS
+#define UNW_REG_PR              IA64_REG_PR
+#define UNW_REG_RNAT            IA64_REG_RNAT
+#define UNW_REG_PSP             IA64_REG_PSP
+#define UNW_REG_RP              IA64_REG_IP
+#define UNW_REG_UNAT            IA64_REG_UNAT
+
+/* Region headers.  */
+#define UNW_DEC_PROLOGUE_GR(fmt,r,m,gr,arg)     desc_prologue(0,r,m,gr,arg)
+#define UNW_DEC_PROLOGUE(fmt,b,r,arg)           desc_prologue(b,r,0,32,arg)
+
+/* Prologue descriptors.  */
+#define UNW_DEC_ABI(fmt,a,c,arg)                desc_abi(a,c,arg)
+#define UNW_DEC_BR_GR(fmt,b,g,arg)              desc_br_gr(b,g,arg)
+#define UNW_DEC_BR_MEM(fmt,b,arg)               desc_br_mem(b,arg)
+#define UNW_DEC_FRGR_MEM(fmt,g,f,arg)           desc_frgr_mem(g,f,arg)
+#define UNW_DEC_FR_MEM(fmt,f,arg)               desc_fr_mem(f,arg)
+#define UNW_DEC_GR_GR(fmt,m,g,arg)              desc_gr_gr(m,g,arg)
+#define UNW_DEC_GR_MEM(fmt,m,arg)               desc_gr_mem(m,arg)
+#define UNW_DEC_MEM_STACK_F(fmt,t,s,arg)        desc_mem_stack_f(t,s,arg)
+#define UNW_DEC_MEM_STACK_V(fmt,t,arg)          desc_mem_stack_v(t,arg)
+#define UNW_DEC_REG_GR(fmt,r,d,arg)             desc_reg_gr(r,d,arg)
+#define UNW_DEC_REG_PSPREL(fmt,r,o,arg)         desc_reg_psprel(r,o,arg)
+#define UNW_DEC_REG_SPREL(fmt,r,o,arg)          desc_reg_sprel(r,o,arg)
+#define UNW_DEC_REG_WHEN(fmt,r,t,arg)           desc_reg_when(r,t,arg)
+#define UNW_DEC_PRIUNAT_WHEN_GR(fmt,t,arg) \
+        desc_reg_when(IA64_REG_PRI_UNAT_GR,t,arg)
+#define UNW_DEC_PRIUNAT_WHEN_MEM(fmt,t,arg) \
+        desc_reg_when(IA64_REG_PRI_UNAT_MEM,t,arg)
+#define UNW_DEC_PRIUNAT_GR(fmt,r,arg) \
+        desc_reg_gr(IA64_REG_PRI_UNAT_GR,r,arg)
+#define UNW_DEC_PRIUNAT_PSPREL(fmt,o,arg) \
+        desc_reg_psprel(IA64_REG_PRI_UNAT_MEM,o,arg)
+#define UNW_DEC_PRIUNAT_SPREL(fmt,o,arg) \
+        desc_reg_sprel(IA64_REG_PRI_UNAT_MEM,o,arg)
+#define UNW_DEC_RP_BR(fmt,d,arg)                desc_rp_br(d,arg)
+#define UNW_DEC_SPILL_BASE(fmt,o,arg)           desc_spill_base(o,arg)
+#define UNW_DEC_SPILL_MASK(fmt,m,arg)           (m = desc_spill_mask(m,arg))
+
+/* Body descriptors.  */
+#define UNW_DEC_EPILOGUE(fmt,t,c,arg)           desc_epilogue(t,c,arg)
+#define UNW_DEC_COPY_STATE(fmt,l,arg)           desc_copy_state(l,arg)
+#define UNW_DEC_LABEL_STATE(fmt,l,arg)          desc_label_state(l,arg)
+
+/* General unwind descriptors.  */
+#define UNW_DEC_SPILL_REG_P(f,p,t,a,x,y,arg)    desc_spill_reg_p(p,t,a,x,y,arg)
+#define UNW_DEC_SPILL_REG(f,t,a,x,y,arg)        desc_spill_reg_p(0,t,a,x,y,arg)
+#define UNW_DEC_SPILL_PSPREL_P(f,p,t,a,o,arg) \
+        desc_spill_psprel_p(p,t,a,o,arg)
+#define UNW_DEC_SPILL_PSPREL(f,t,a,o,arg) \
+        desc_spill_psprel_p(0,t,a,o,arg)
+#define UNW_DEC_SPILL_SPREL_P(f,p,t,a,o,arg)    desc_spill_sprel_p(p,t,a,o,arg)
+#define UNW_DEC_SPILL_SPREL(f,t,a,o,arg)        desc_spill_sprel_p(0,t,a,o,arg)
+#define UNW_DEC_RESTORE_P(f,p,t,a,arg)          desc_restore_p(p,t,a,arg)
+#define UNW_DEC_RESTORE(f,t,a,arg)              desc_restore_p(0,t,a,arg)
+
+#include "unwind_decoder.h"
+
+#ifdef _U_dyn_op
+
+/* parse dynamic unwind info */
+
+static struct ia64_reg_info *
+lookup_preg (int regnum, int memory, struct ia64_state_record *sr)
+{
+  int preg;
+
+  switch (regnum)
+    {
+    case UNW_IA64_AR_BSP:               preg = IA64_REG_BSP; break;
+    case UNW_IA64_AR_BSPSTORE:          preg = IA64_REG_BSPSTORE; break;
+    case UNW_IA64_AR_FPSR:              preg = IA64_REG_FPSR; break;
+    case UNW_IA64_AR_LC:                preg = IA64_REG_LC; break;
+    case UNW_IA64_AR_PFS:               preg = IA64_REG_PFS; break;
+    case UNW_IA64_AR_RNAT:              preg = IA64_REG_RNAT; break;
+    case UNW_IA64_AR_UNAT:              preg = IA64_REG_UNAT; break;
+    case UNW_IA64_BR + 0:               preg = IA64_REG_IP; break;
+    case UNW_IA64_PR:                   preg = IA64_REG_PR; break;
+    case UNW_IA64_SP:                   preg = IA64_REG_PSP; break;
+
+    case UNW_IA64_NAT:
+      if (memory)
+        preg = IA64_REG_PRI_UNAT_MEM;
+      else
+        preg = IA64_REG_PRI_UNAT_GR;
+      break;
+
+    case UNW_IA64_GR + 4 ... UNW_IA64_GR + 7:
+      preg = IA64_REG_R4 + (regnum - (UNW_IA64_GR + 4));
+      break;
+
+    case UNW_IA64_BR + 1 ... UNW_IA64_BR + 5:
+      preg = IA64_REG_B1 + (regnum - UNW_IA64_BR);
+      break;
+
+    case UNW_IA64_FR + 2 ... UNW_IA64_FR + 5:
+      preg = IA64_REG_F2 + (regnum - (UNW_IA64_FR + 2));
+      break;
+
+    case UNW_IA64_FR + 16 ... UNW_IA64_FR + 31:
+      preg = IA64_REG_F16 + (regnum - (UNW_IA64_FR + 16));
+      break;
+
+    default:
+      Dprintf ("%s: invalid register number %d\n", __FUNCTION__, regnum);
+      return NULL;
+    }
+  return sr->curr.reg + preg;
+}
+
+/* An alias directive inside a region of length RLEN is interpreted to
+   mean that the region behaves exactly like the first RLEN
+   instructions at the aliased IP.  RLEN=0 implies that the current
+   state matches exactly that of before the instruction at the aliased
+   IP is executed.  */
+
+static int
+desc_alias (unw_dyn_op_t *op, struct cursor *c, struct ia64_state_record *sr)
+{
+  struct ia64_state_record orig_sr = *sr;
+  int i, ret, when, rlen = sr->region_len;
+  unw_word_t new_ip;
+
+  when = MIN (sr->when_target, rlen);
+  new_ip = op->val + ((when / 3) * 16 + (when % 3));
+
+  if ((ret = ia64_fetch_proc_info (c, new_ip, 1)) < 0)
+    return ret;
+
+  if ((ret = create_state_record_for (c, sr, new_ip)) < 0)
+    return ret;
+
+  sr->first_region = orig_sr.first_region;
+  sr->done = 0;
+  sr->any_spills |= orig_sr.any_spills;
+  sr->in_body = orig_sr.in_body;
+  sr->region_start = orig_sr.region_start;
+  sr->region_len = orig_sr.region_len;
+  if (sr->when_sp_restored != IA64_WHEN_NEVER)
+    sr->when_sp_restored = op->when + MIN (orig_sr.when_sp_restored, rlen);
+  sr->epilogue_count = orig_sr.epilogue_count;
+  sr->when_target = orig_sr.when_target;
+
+  for (i = 0; i < IA64_NUM_PREGS; ++i)
+    if (sr->curr.reg[i].when != IA64_WHEN_NEVER)
+      sr->curr.reg[i].when = op->when + MIN (sr->curr.reg[i].when, rlen);
+
+  ia64_free_state_record (sr);
+  sr->labeled_states = orig_sr.labeled_states;
+  sr->curr.next = orig_sr.curr.next;
+  return 0;
+}
+
+static inline int
+parse_dynamic (struct cursor *c, struct ia64_state_record *sr)
+{
+  unw_dyn_info_t *di = c->pi.unwind_info;
+  unw_dyn_proc_info_t *proc = &di->u.pi;
+  unw_dyn_region_info_t *r;
+  struct ia64_reg_info *ri;
+  enum ia64_where where;
+  int32_t when, len;
+  unw_dyn_op_t *op;
+  unw_word_t val;
+  int memory, ret;
+  int8_t qp;
+
+  for (r = proc->regions; r; r = r->next)
+    {
+      len = r->insn_count;
+      if (len < 0)
+        {
+          if (r->next)
+            {
+              Debug (1, "negative region length allowed in last region only!");
+              return -UNW_EINVAL;
+            }
+          len = -len;
+          /* hack old region info to set the start where we need it: */
+          sr->region_start = (di->end_ip - di->start_ip) / 0x10 * 3 - len;
+          sr->region_len = 0;
+        }
+      /* all regions are treated as prologue regions: */
+      desc_prologue (0, len, 0, 0, sr);
+
+      if (sr->done)
+        return 0;
+
+      for (op = r->op; op < r->op + r->op_count; ++op)
+        {
+          when = op->when;
+          val = op->val;
+          qp = op->qp;
+
+          if (!desc_is_active (qp, when, sr))
+            continue;
+
+          when = sr->region_start + MIN ((int) when, sr->region_len - 1);
+
+          switch (op->tag)
+            {
+            case UNW_DYN_SAVE_REG:
+              memory = 0;
+              if ((unsigned) (val - UNW_IA64_GR) < 128)
+                where = IA64_WHERE_GR;
+              else if ((unsigned) (val - UNW_IA64_FR) < 128)
+                where = IA64_WHERE_FR;
+              else if ((unsigned) (val - UNW_IA64_BR) < 8)
+                where = IA64_WHERE_BR;
+              else
+                {
+                  Dprintf ("%s: can't save to register number %d\n",
+                           __FUNCTION__, (int) op->reg);
+                  return -UNW_EBADREG;
+                }
+              /* fall through */
+            update_reg_info:
+              ri = lookup_preg (op->reg, memory, sr);
+              if (!ri)
+                return -UNW_EBADREG;
+              ri->where = where;
+              ri->when = when;
+              ri->val = val;
+              break;
+
+            case UNW_DYN_SPILL_FP_REL:
+              memory = 1;
+              where = IA64_WHERE_PSPREL;
+              val = 0x10 - val;
+              goto update_reg_info;
+
+            case UNW_DYN_SPILL_SP_REL:
+              memory = 1;
+              where = IA64_WHERE_SPREL;
+              goto update_reg_info;
+
+            case UNW_DYN_ADD:
+              if (op->reg == UNW_IA64_SP)
+                {
+                  if (val & 0xf)
+                    {
+                      Dprintf ("%s: frame-size %ld not an integer "
+                               "multiple of 16\n",
+                               __FUNCTION__, (long) op->val);
+                      return -UNW_EINVAL;
+                    }
+                  desc_mem_stack_f (when, -((int64_t) val / 16), sr);
+                }
+              else
+                {
+                  Dprintf ("%s: can only ADD to stack-pointer\n",
+                           __FUNCTION__);
+                  return -UNW_EBADREG;
+                }
+              break;
+
+            case UNW_DYN_POP_FRAMES:
+              sr->when_sp_restored = when;
+              sr->epilogue_count = op->val;
+              break;
+
+            case UNW_DYN_LABEL_STATE:
+              desc_label_state (op->val, sr);
+              break;
+
+            case UNW_DYN_COPY_STATE:
+              desc_copy_state (op->val, sr);
+              break;
+
+            case UNW_DYN_ALIAS:
+              if ((ret = desc_alias (op, c, sr)) < 0)
+                return ret;
+
+            case UNW_DYN_STOP:
+              goto end_of_ops;
+            }
+        }
+    end_of_ops:
+      ;
+    }
+  return 0;
+}
+#else
+# define parse_dynamic(c,sr)    (-UNW_EINVAL)
+#endif /* _U_dyn_op */
+
+
+HIDDEN int
+ia64_fetch_proc_info (struct cursor *c, unw_word_t ip, int need_unwind_info)
+{
+  int ret, dynamic = 1;
+
+  if (c->pi_valid && !need_unwind_info)
+    return 0;
+
+  /* check dynamic info first --- it overrides everything else */
+  ret = unwi_find_dynamic_proc_info (c->as, ip, &c->pi, need_unwind_info,
+                                     c->as_arg);
+  if (ret == -UNW_ENOINFO)
+    {
+      dynamic = 0;
+      ret = ia64_find_proc_info (c, ip, need_unwind_info);
+    }
+
+  c->pi_valid = 1;
+  c->pi_is_dynamic = dynamic;
+  return ret;
+}
+
+static inline void
+put_unwind_info (struct cursor *c, unw_proc_info_t *pi)
+{
+  if (!c->pi_valid)
+    return;
+
+  if (c->pi_is_dynamic)
+    unwi_put_dynamic_unwind_info (c->as, pi, c->as_arg);
+  else
+    ia64_put_unwind_info (c, pi);
+}
+
+static int
+create_state_record_for (struct cursor *c, struct ia64_state_record *sr,
+                         unw_word_t ip)
+{
+  unw_word_t predicates = c->pr;
+  struct ia64_reg_info *r;
+  uint8_t *dp, *desc_end;
+  int ret;
+
+  assert (c->pi_valid);
+
+  /* build state record */
+  memset (sr, 0, sizeof (*sr));
+  for (r = sr->curr.reg; r < sr->curr.reg + IA64_NUM_PREGS; ++r)
+    r->when = IA64_WHEN_NEVER;
+  sr->pr_val = predicates;
+  sr->first_region = 1;
+
+  if (!c->pi.unwind_info)
+    {
+      /* No info, return default unwinder (leaf proc, no mem stack, no
+         saved regs), rp in b0, pfs in ar.pfs.  */
+      Debug (1, "no unwind info for ip=0x%lx (gp=%lx)\n",
+             (long) ip, (long) c->pi.gp);
+      sr->curr.reg[IA64_REG_IP].where = IA64_WHERE_BR;
+      sr->curr.reg[IA64_REG_IP].when = -1;
+      sr->curr.reg[IA64_REG_IP].val = 0;
+      goto out;
+    }
+
+  sr->when_target = (3 * ((ip & ~(unw_word_t) 0xf) - c->pi.start_ip) / 16
+                     + (ip & 0xf));
+
+  switch (c->pi.format)
+    {
+    case UNW_INFO_FORMAT_TABLE:
+    case UNW_INFO_FORMAT_REMOTE_TABLE:
+      dp = c->pi.unwind_info;
+      desc_end = dp + c->pi.unwind_info_size;
+      while (!sr->done && dp < desc_end)
+        dp = unw_decode (dp, sr->in_body, sr);
+      ret = 0;
+      break;
+
+    case UNW_INFO_FORMAT_DYNAMIC:
+      ret = parse_dynamic (c, sr);
+      break;
+
+    default:
+      ret = -UNW_EINVAL;
+    }
+
+  put_unwind_info (c, &c->pi);
+
+  if (ret < 0)
+    return ret;
+
+  if (sr->when_target > sr->when_sp_restored)
+    {
+      /* sp has been restored and all values on the memory stack below
+         psp also have been restored.  */
+      sr->curr.reg[IA64_REG_PSP].val = 0;
+      sr->curr.reg[IA64_REG_PSP].where = IA64_WHERE_NONE;
+      sr->curr.reg[IA64_REG_PSP].when = IA64_WHEN_NEVER;
+      for (r = sr->curr.reg; r < sr->curr.reg + IA64_NUM_PREGS; ++r)
+        if ((r->where == IA64_WHERE_PSPREL && r->val <= 0x10)
+            || r->where == IA64_WHERE_SPREL)
+          {
+            r->val = 0;
+            r->where = IA64_WHERE_NONE;
+            r->when = IA64_WHEN_NEVER;
+          }
+    }
+
+  /* If RP did't get saved, generate entry for the return link
+     register.  */
+  if (sr->curr.reg[IA64_REG_IP].when >= sr->when_target)
+    {
+      sr->curr.reg[IA64_REG_IP].where = IA64_WHERE_BR;
+      sr->curr.reg[IA64_REG_IP].when = -1;
+      sr->curr.reg[IA64_REG_IP].val = sr->return_link_reg;
+    }
+
+  if (sr->when_target > sr->curr.reg[IA64_REG_BSP].when
+      && sr->when_target > sr->curr.reg[IA64_REG_BSPSTORE].when
+      && sr->when_target > sr->curr.reg[IA64_REG_RNAT].when)
+    {
+      Debug (8, "func 0x%lx may switch the register-backing-store\n",
+             c->pi.start_ip);
+      c->pi.flags |= UNW_PI_FLAG_IA64_RBS_SWITCH;
+    }
+ out:
+#if UNW_DEBUG
+  if (unwi_debug_level > 2)
+    {
+      Dprintf ("%s: state record for func 0x%lx, t=%u (flags=0x%lx):\n",
+               __FUNCTION__,
+               (long) c->pi.start_ip, sr->when_target, (long) c->pi.flags);
+      for (r = sr->curr.reg; r < sr->curr.reg + IA64_NUM_PREGS; ++r)
+        {
+          if (r->where != IA64_WHERE_NONE || r->when != IA64_WHEN_NEVER)
+            {
+              Dprintf ("  %s <- ", unw.preg_name[r - sr->curr.reg]);
+              switch (r->where)
+                {
+                case IA64_WHERE_GR:
+                  Dprintf ("r%lu", (long) r->val);
+                  break;
+                case IA64_WHERE_FR:
+                  Dprintf ("f%lu", (long) r->val);
+                  break;
+                case IA64_WHERE_BR:
+                  Dprintf ("b%lu", (long) r->val);
+                  break;
+                case IA64_WHERE_SPREL:
+                  Dprintf ("[sp+0x%lx]", (long) r->val);
+                  break;
+                case IA64_WHERE_PSPREL:
+                  Dprintf ("[psp+0x%lx]", (long) r->val);
+                  break;
+                case IA64_WHERE_NONE:
+                  Dprintf ("%s+0x%lx",
+                           unw.preg_name[r - sr->curr.reg], (long) r->val);
+                  break;
+                default:
+                  Dprintf ("BADWHERE(%d)", r->where);
+                  break;
+                }
+              Dprintf ("\t\t%d\n", r->when);
+            }
+        }
+    }
+#endif
+  return 0;
+}
+
+/* The proc-info must be valid for IP before this routine can be
+   called.  */
+HIDDEN int
+ia64_create_state_record (struct cursor *c, struct ia64_state_record *sr)
+{
+  return create_state_record_for (c, sr, c->ip);
+}
+
+HIDDEN int
+ia64_free_state_record (struct ia64_state_record *sr)
+{
+  struct ia64_labeled_state *ls, *next;
+
+  /* free labeled register states & stack: */
+
+  for (ls = sr->labeled_states; ls; ls = next)
+    {
+      next = ls->next;
+      free_state_stack (&ls->saved_state);
+      free_labeled_state (ls);
+    }
+  free_state_stack (&sr->curr);
+
+  return 0;
+}
+
+HIDDEN int
+ia64_make_proc_info (struct cursor *c)
+{
+  int ret, caching = c->as->caching_policy != UNW_CACHE_NONE;
+
+  if (!caching || ia64_get_cached_proc_info (c) < 0)
+    {
+      /* Lookup it up the slow way... */
+      if ((ret = ia64_fetch_proc_info (c, c->ip, 0)) < 0)
+        return ret;
+      if (caching)
+        ia64_cache_proc_info (c);
+    }
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/ia64/Grbs.c b/src/third_party/unwind/dist/src/ia64/Grbs.c
new file mode 100644
index 00000000000..e7c01fe219e
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Grbs.c
@@ -0,0 +1,319 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* Logically, we like to think of the stack as a contiguous region of
+memory.  Unfortunately, this logical view doesn't work for the
+register backing store, because the RSE is an asynchronous engine and
+because UNIX/Linux allow for stack-switching via sigaltstack(2).
+Specifically, this means that any given stacked register may or may
+not be backed up by memory in the current stack.  If not, then the
+backing memory may be found in any of the "more inner" (younger)
+stacks.  The routines in this file help manage the discontiguous
+nature of the register backing store.  The routines are completely
+independent of UNIX/Linux, but each stack frame that switches the
+backing store is expected to reserve 4 words for use by libunwind. For
+example, in the Linux sigcontext, sc_fr[0] and sc_fr[1] serve this
+purpose.  */
+
+#include "unwind_i.h"
+
+#if UNW_DEBUG
+
+HIDDEN const char *
+ia64_strloc (ia64_loc_t loc)
+{
+  static char buf[128];
+
+  if (IA64_IS_NULL_LOC (loc))
+    return "<null>";
+
+  buf[0] = '\0';
+
+  if (IA64_IS_MEMSTK_NAT (loc))
+    strcat (buf, "memstk_nat(");
+  if (IA64_IS_UC_LOC (loc))
+    strcat (buf, "uc(");
+  if (IA64_IS_FP_LOC (loc))
+    strcat (buf, "fp(");
+
+  if (IA64_IS_REG_LOC (loc))
+    sprintf (buf + strlen (buf), "%s", unw_regname (IA64_GET_REG (loc)));
+  else
+    sprintf (buf + strlen (buf), "0x%llx",
+             (unsigned long long) IA64_GET_ADDR (loc));
+
+  if (IA64_IS_FP_LOC (loc))
+    strcat (buf, ")");
+  if (IA64_IS_UC_LOC (loc))
+    strcat (buf, ")");
+  if (IA64_IS_MEMSTK_NAT (loc))
+    strcat (buf, ")");
+
+  return buf;
+}
+
+#endif /* UNW_DEBUG */
+
+HIDDEN int
+rbs_switch (struct cursor *c,
+            unw_word_t saved_bsp, unw_word_t saved_bspstore,
+            ia64_loc_t saved_rnat_loc)
+{
+  struct rbs_area *rbs = &c->rbs_area[c->rbs_curr];
+  unw_word_t lo, ndirty, rbs_base;
+  int ret;
+
+  Debug (10, "(left=%u, curr=%u)\n", c->rbs_left_edge, c->rbs_curr);
+
+  /* Calculate address "lo" at which the backing store starts:  */
+  ndirty = rse_num_regs (saved_bspstore, saved_bsp);
+  lo = rse_skip_regs (c->bsp, -ndirty);
+
+  rbs->size = (rbs->end - lo);
+
+  /* If the previously-recorded rbs-area is empty we don't need to
+     track it and we can simply overwrite it... */
+  if (rbs->size)
+    {
+      Debug (10, "inner=[0x%lx-0x%lx)\n",
+             (long) (rbs->end - rbs->size), (long) rbs->end);
+
+      c->rbs_curr = (c->rbs_curr + 1) % ARRAY_SIZE (c->rbs_area);
+      rbs = c->rbs_area + c->rbs_curr;
+
+      if (c->rbs_curr == c->rbs_left_edge)
+        c->rbs_left_edge = (c->rbs_left_edge + 1) % ARRAY_SIZE (c->rbs_area);
+    }
+
+  if ((ret = rbs_get_base (c, saved_bspstore, &rbs_base)) < 0)
+    return ret;
+
+  rbs->end = saved_bspstore;
+  rbs->size = saved_bspstore - rbs_base;
+  rbs->rnat_loc = saved_rnat_loc;
+
+  c->bsp = saved_bsp;
+
+  Debug (10, "outer=[0x%llx-0x%llx), rnat@%s\n", (long long) rbs_base,
+         (long long) rbs->end, ia64_strloc (rbs->rnat_loc));
+  return 0;
+}
+
+HIDDEN int
+rbs_find_stacked (struct cursor *c, unw_word_t regs_to_skip,
+                  ia64_loc_t *locp, ia64_loc_t *rnat_locp)
+{
+  unw_word_t nregs, bsp = c->bsp, curr = c->rbs_curr, n;
+  unw_word_t left_edge = c->rbs_left_edge;
+#if UNW_DEBUG
+  int reg = 32 + regs_to_skip;
+#endif
+
+  while (!rbs_contains (&c->rbs_area[curr], bsp))
+    {
+      if (curr == left_edge)
+        {
+          Debug (1, "could not find register r%d!\n", reg);
+          return -UNW_EBADREG;
+        }
+
+      n = rse_num_regs (c->rbs_area[curr].end, bsp);
+      curr = (curr + ARRAY_SIZE (c->rbs_area) - 1) % ARRAY_SIZE (c->rbs_area);
+      bsp = rse_skip_regs (c->rbs_area[curr].end - c->rbs_area[curr].size, n);
+    }
+
+  while (1)
+    {
+      nregs = rse_num_regs (bsp, c->rbs_area[curr].end);
+
+      if (regs_to_skip < nregs)
+        {
+          /* found it: */
+          unw_word_t addr;
+
+          addr = rse_skip_regs (bsp, regs_to_skip);
+          if (locp)
+            *locp = rbs_loc (c->rbs_area + curr, addr);
+          if (rnat_locp)
+            *rnat_locp = rbs_get_rnat_loc (c->rbs_area + curr, addr);
+          return 0;
+        }
+
+      if (curr == left_edge)
+        {
+          Debug (1, "could not find register r%d!\n", reg);
+          return -UNW_EBADREG;
+        }
+
+      regs_to_skip -= nregs;
+
+      curr = (curr + ARRAY_SIZE (c->rbs_area) - 1) % ARRAY_SIZE (c->rbs_area);
+      bsp = c->rbs_area[curr].end - c->rbs_area[curr].size;
+    }
+}
+
+#ifdef NEED_RBS_COVER_AND_FLUSH
+
+static inline int
+get_rnat (struct cursor *c, struct rbs_area *rbs, unw_word_t bsp,
+          unw_word_t *__restrict rnatp)
+{
+  ia64_loc_t rnat_locp = rbs_get_rnat_loc (rbs, bsp);
+
+  return ia64_get (c, rnat_locp, rnatp);
+}
+
+/* Simulate the effect of "cover" followed by a "flushrs" for the
+   target-frame.  However, since the target-frame's backing store
+   may not have space for the registers that got spilled onto other
+   rbs-areas, we save those registers to DIRTY_PARTITION where
+   we can then load them via a single "loadrs".
+
+   This function returns the size of the dirty-partition that was
+   created or a negative error-code in case of error.
+
+   Note: This does not modify the rbs_area[] structure in any way.  */
+HIDDEN int
+rbs_cover_and_flush (struct cursor *c, unw_word_t nregs,
+                     unw_word_t *dirty_partition, unw_word_t *dirty_rnat,
+                     unw_word_t *bspstore)
+{
+  unw_word_t n, src_mask, dst_mask, bsp, *dst, src_rnat, dst_rnat = 0;
+  unw_word_t curr = c->rbs_curr, left_edge = c->rbs_left_edge;
+  struct rbs_area *rbs = c->rbs_area + curr;
+  int ret;
+
+  bsp = c->bsp;
+  c->bsp = rse_skip_regs (bsp, nregs);
+
+  if (likely (rbs_contains (rbs, bsp)))
+    {
+      /* at least _some_ registers are on rbs... */
+      n = rse_num_regs (bsp, rbs->end);
+      if (likely (n >= nregs))
+        {
+          /* common case #1: all registers are on current rbs... */
+          /* got lucky: _all_ registers are on rbs... */
+          ia64_loc_t rnat_loc = rbs_get_rnat_loc (rbs, c->bsp);
+
+          *bspstore = c->bsp;
+
+          if (IA64_IS_REG_LOC (rnat_loc))
+            {
+              unw_word_t rnat_addr = (unw_word_t)
+                tdep_uc_addr (c->as_arg, UNW_IA64_AR_RNAT, NULL);
+              rnat_loc = IA64_LOC_ADDR (rnat_addr, 0);
+            }
+          c->loc[IA64_REG_RNAT] = rnat_loc;
+          return 0;     /* all done */
+        }
+      nregs -= n;       /* account for registers already on the rbs */
+
+      assert (rse_skip_regs (c->bsp, -nregs) == rse_skip_regs (rbs->end, 0));
+    }
+  else
+    /* Earlier frames also didn't get spilled; need to "loadrs" those,
+       too... */
+    nregs += rse_num_regs (rbs->end, bsp);
+
+  /* OK, we need to copy NREGS registers to the dirty partition.  */
+
+  *bspstore = bsp = rbs->end;
+  c->loc[IA64_REG_RNAT] = rbs->rnat_loc;
+  assert (!IA64_IS_REG_LOC (rbs->rnat_loc));
+
+  dst = dirty_partition;
+
+  while (nregs > 0)
+    {
+      if (unlikely (!rbs_contains (rbs, bsp)))
+        {
+          /* switch to next non-empty rbs-area: */
+          do
+            {
+              if (curr == left_edge)
+                {
+                  Debug (0, "rbs-underflow while flushing %lu regs, "
+                         "bsp=0x%lx, dst=0x%p\n", (unsigned long) nregs,
+                         (unsigned long) bsp, dst);
+                  return -UNW_EBADREG;
+                }
+
+              assert (rse_num_regs (rbs->end, bsp) == 0);
+
+              curr = (curr + ARRAY_SIZE (c->rbs_area) - 1)
+                      % ARRAY_SIZE (c->rbs_area);
+              rbs = c->rbs_area + curr;
+              bsp = rbs->end - rbs->size;
+            }
+          while (rbs->size == 0);
+
+          if ((ret = get_rnat (c, rbs, bsp, &src_rnat)) < 0)
+            return ret;
+        }
+
+      if (unlikely (rse_is_rnat_slot (bsp)))
+        {
+          bsp += 8;
+          if ((ret = get_rnat (c, rbs, bsp, &src_rnat)) < 0)
+            return ret;
+        }
+      if (unlikely (rse_is_rnat_slot ((unw_word_t) dst)))
+        {
+          *dst++ = dst_rnat;
+          dst_rnat = 0;
+        }
+
+      src_mask = ((unw_word_t) 1) << rse_slot_num (bsp);
+      dst_mask = ((unw_word_t) 1) << rse_slot_num ((unw_word_t) dst);
+
+      if (src_rnat & src_mask)
+        dst_rnat |= dst_mask;
+      else
+        dst_rnat &= ~dst_mask;
+
+      /* copy one slot: */
+      if ((ret = ia64_get (c, rbs_loc (rbs, bsp), dst)) < 0)
+        return ret;
+
+      /* advance to next slot: */
+      --nregs;
+      bsp += 8;
+      ++dst;
+    }
+  if (unlikely (rse_is_rnat_slot ((unw_word_t) dst)))
+    {
+      /* The LOADRS instruction loads "the N bytes below the current
+         BSP" but BSP can never point to an RNaT slot so if the last
+         destination word happens to be an RNaT slot, we need to write
+         that slot now. */
+      *dst++ = dst_rnat;
+      dst_rnat = 0;
+    }
+  *dirty_rnat = dst_rnat;
+  return (char *) dst - (char *) dirty_partition;
+}
+
+#endif /* !UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/dist/src/ia64/Greg_states_iterate.c b/src/third_party/unwind/dist/src/ia64/Greg_states_iterate.c
new file mode 100644
index 00000000000..3570740af15
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Greg_states_iterate.c
@@ -0,0 +1,39 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_reg_states_iterate (unw_cursor_t *cursor,
+			unw_reg_states_callback cb, void *token)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  // Needs dwarf support on ia64
+  // return dwarf_reg_states_iterate (&c->dwarf, cb, token);
+  return -UNW_EINVAL;
+}
diff --git a/src/third_party/unwind/dist/src/ia64/Gregs.c b/src/third_party/unwind/dist/src/ia64/Gregs.c
new file mode 100644
index 00000000000..ac6f738a6cd
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Gregs.c
@@ -0,0 +1,612 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "offsets.h"
+#include "regs.h"
+#include "unwind_i.h"
+
+static inline ia64_loc_t
+linux_scratch_loc (struct cursor *c, unw_regnum_t reg, uint8_t *nat_bitnr)
+{
+#if !defined(UNW_LOCAL_ONLY) || defined(__linux)
+  unw_word_t addr = c->sigcontext_addr, flags, tmp_addr;
+  int i;
+
+  if (ia64_get_abi_marker (c) == ABI_MARKER_LINUX_SIGTRAMP
+      || ia64_get_abi_marker (c) == ABI_MARKER_OLD_LINUX_SIGTRAMP)
+    {
+      switch (reg)
+        {
+        case UNW_IA64_NAT + 2 ... UNW_IA64_NAT + 3:
+        case UNW_IA64_NAT + 8 ... UNW_IA64_NAT + 31:
+          /* Linux sigcontext contains the NaT bit of scratch register
+             N in bit position N of the sc_nat member. */
+          *nat_bitnr = (reg - UNW_IA64_NAT);
+          addr += LINUX_SC_NAT_OFF;
+          break;
+
+        case UNW_IA64_GR +  2 ... UNW_IA64_GR + 3:
+        case UNW_IA64_GR +  8 ... UNW_IA64_GR + 31:
+          addr += LINUX_SC_GR_OFF + 8 * (reg - UNW_IA64_GR);
+          break;
+
+        case UNW_IA64_FR + 6 ... UNW_IA64_FR + 15:
+          addr += LINUX_SC_FR_OFF + 16 * (reg - UNW_IA64_FR);
+          return IA64_LOC_ADDR (addr, IA64_LOC_TYPE_FP);
+
+        case UNW_IA64_FR + 32 ... UNW_IA64_FR + 127:
+          if (ia64_get (c, IA64_LOC_ADDR (addr + LINUX_SC_FLAGS_OFF, 0),
+                        &flags) < 0)
+            return IA64_NULL_LOC;
+
+          if (!(flags & IA64_SC_FLAG_FPH_VALID))
+            {
+              /* initialize fph partition: */
+              tmp_addr = addr + LINUX_SC_FR_OFF + 32*16;
+              for (i = 32; i < 128; ++i, tmp_addr += 16)
+                if (ia64_putfp (c, IA64_LOC_ADDR (tmp_addr, 0),
+                                unw.read_only.f0) < 0)
+                  return IA64_NULL_LOC;
+              /* mark fph partition as valid: */
+              if (ia64_put (c, IA64_LOC_ADDR (addr + LINUX_SC_FLAGS_OFF, 0),
+                            flags | IA64_SC_FLAG_FPH_VALID) < 0)
+                return IA64_NULL_LOC;
+            }
+
+          addr += LINUX_SC_FR_OFF + 16 * (reg - UNW_IA64_FR);
+          return IA64_LOC_ADDR (addr, IA64_LOC_TYPE_FP);
+
+        case UNW_IA64_BR + 0: addr += LINUX_SC_BR_OFF + 0; break;
+        case UNW_IA64_BR + 6: addr += LINUX_SC_BR_OFF + 6*8; break;
+        case UNW_IA64_BR + 7: addr += LINUX_SC_BR_OFF + 7*8; break;
+        case UNW_IA64_AR_RSC: addr += LINUX_SC_AR_RSC_OFF; break;
+        case UNW_IA64_AR_CSD: addr += LINUX_SC_AR_CSD_OFF; break;
+        case UNW_IA64_AR_SSD: addr += LINUX_SC_AR_SSD_OFF; break;
+        case UNW_IA64_AR_CCV: addr += LINUX_SC_AR_CCV; break;
+
+        default:
+          if (unw_is_fpreg (reg))
+            return IA64_FPREG_LOC (c, reg);
+          else
+            return IA64_REG_LOC (c, reg);
+        }
+      return IA64_LOC_ADDR (addr, 0);
+    }
+  else
+    {
+      int is_nat = 0;
+
+      if ((unsigned) (reg - UNW_IA64_NAT) < 128)
+        {
+          is_nat = 1;
+          reg -= (UNW_IA64_NAT - UNW_IA64_GR);
+        }
+      if (ia64_get_abi_marker (c) == ABI_MARKER_LINUX_INTERRUPT)
+        {
+          switch (reg)
+            {
+            case UNW_IA64_BR + 6 ... UNW_IA64_BR + 7:
+              addr += LINUX_PT_B6_OFF + 8 * (reg - (UNW_IA64_BR + 6));
+              break;
+
+            case UNW_IA64_AR_CSD: addr += LINUX_PT_CSD_OFF; break;
+            case UNW_IA64_AR_SSD: addr += LINUX_PT_SSD_OFF; break;
+
+            case UNW_IA64_GR +  8 ... UNW_IA64_GR + 11:
+              addr += LINUX_PT_R8_OFF + 8 * (reg - (UNW_IA64_GR + 8));
+              break;
+
+            case UNW_IA64_IP: addr += LINUX_PT_IIP_OFF; break;
+            case UNW_IA64_CFM: addr += LINUX_PT_IFS_OFF; break;
+            case UNW_IA64_AR_UNAT: addr += LINUX_PT_UNAT_OFF; break;
+            case UNW_IA64_AR_PFS: addr += LINUX_PT_PFS_OFF; break;
+            case UNW_IA64_AR_RSC: addr += LINUX_PT_RSC_OFF; break;
+            case UNW_IA64_AR_RNAT: addr += LINUX_PT_RNAT_OFF; break;
+            case UNW_IA64_AR_BSPSTORE: addr += LINUX_PT_BSPSTORE_OFF; break;
+            case UNW_IA64_PR: addr += LINUX_PT_PR_OFF; break;
+            case UNW_IA64_BR + 0: addr += LINUX_PT_B0_OFF; break;
+
+            case UNW_IA64_GR + 1:
+              /* The saved r1 value is valid only in the frame in which
+                 it was saved; for everything else we need to look up
+                 the appropriate gp value.  */
+              if (c->sigcontext_addr != c->sp + 0x10)
+                return IA64_NULL_LOC;
+              addr += LINUX_PT_R1_OFF;
+              break;
+
+            case UNW_IA64_GR + 12: addr += LINUX_PT_R12_OFF; break;
+            case UNW_IA64_GR + 13: addr += LINUX_PT_R13_OFF; break;
+            case UNW_IA64_AR_FPSR: addr += LINUX_PT_FPSR_OFF; break;
+            case UNW_IA64_GR + 15: addr += LINUX_PT_R15_OFF; break;
+            case UNW_IA64_GR + 14: addr += LINUX_PT_R14_OFF; break;
+            case UNW_IA64_GR + 2: addr += LINUX_PT_R2_OFF; break;
+            case UNW_IA64_GR + 3: addr += LINUX_PT_R3_OFF; break;
+
+            case UNW_IA64_GR + 16 ... UNW_IA64_GR + 31:
+              addr += LINUX_PT_R16_OFF + 8 * (reg - (UNW_IA64_GR + 16));
+              break;
+
+            case UNW_IA64_AR_CCV: addr += LINUX_PT_CCV_OFF; break;
+
+            case UNW_IA64_FR + 6 ... UNW_IA64_FR + 11:
+              addr += LINUX_PT_F6_OFF + 16 * (reg - (UNW_IA64_FR + 6));
+              return IA64_LOC_ADDR (addr, IA64_LOC_TYPE_FP);
+
+            default:
+              if (unw_is_fpreg (reg))
+                return IA64_FPREG_LOC (c, reg);
+              else
+                return IA64_REG_LOC (c, reg);
+            }
+        }
+      else if (ia64_get_abi_marker (c) == ABI_MARKER_OLD_LINUX_INTERRUPT)
+        {
+          switch (reg)
+            {
+            case UNW_IA64_GR +  1:
+              /* The saved r1 value is valid only in the frame in which
+                 it was saved; for everything else we need to look up
+                 the appropriate gp value.  */
+              if (c->sigcontext_addr != c->sp + 0x10)
+                return IA64_NULL_LOC;
+              addr += LINUX_OLD_PT_R1_OFF;
+              break;
+
+            case UNW_IA64_GR +  2 ... UNW_IA64_GR + 3:
+              addr += LINUX_OLD_PT_R2_OFF + 8 * (reg - (UNW_IA64_GR + 2));
+              break;
+
+            case UNW_IA64_GR +  8 ... UNW_IA64_GR + 11:
+              addr += LINUX_OLD_PT_R8_OFF + 8 * (reg - (UNW_IA64_GR + 8));
+              break;
+
+            case UNW_IA64_GR + 16 ... UNW_IA64_GR + 31:
+              addr += LINUX_OLD_PT_R16_OFF + 8 * (reg - (UNW_IA64_GR + 16));
+              break;
+
+            case UNW_IA64_FR + 6 ... UNW_IA64_FR + 9:
+              addr += LINUX_OLD_PT_F6_OFF + 16 * (reg - (UNW_IA64_FR + 6));
+              return IA64_LOC_ADDR (addr, IA64_LOC_TYPE_FP);
+
+            case UNW_IA64_BR + 0: addr += LINUX_OLD_PT_B0_OFF; break;
+            case UNW_IA64_BR + 6: addr += LINUX_OLD_PT_B6_OFF; break;
+            case UNW_IA64_BR + 7: addr += LINUX_OLD_PT_B7_OFF; break;
+
+            case UNW_IA64_AR_RSC: addr += LINUX_OLD_PT_RSC_OFF; break;
+            case UNW_IA64_AR_CCV: addr += LINUX_OLD_PT_CCV_OFF; break;
+
+            default:
+              if (unw_is_fpreg (reg))
+                return IA64_FPREG_LOC (c, reg);
+              else
+                return IA64_REG_LOC (c, reg);
+            }
+        }
+      if (is_nat)
+        {
+          /* For Linux pt-regs structure, bit number is determined by
+             the UNaT slot number (as determined by st8.spill) and the
+             bits are saved wherever the (primary) UNaT was saved.  */
+          *nat_bitnr = ia64_unat_slot_num (addr);
+          return c->loc[IA64_REG_PRI_UNAT_MEM];
+        }
+      return IA64_LOC_ADDR (addr, 0);
+    }
+#endif
+  return IA64_NULL_LOC;
+}
+
+static inline ia64_loc_t
+hpux_scratch_loc (struct cursor *c, unw_regnum_t reg, uint8_t *nat_bitnr)
+{
+#if !defined(UNW_LOCAL_ONLY) || defined(__hpux)
+  return IA64_LOC_UC_REG (reg, c->sigcontext_addr);
+#else
+  return IA64_NULL_LOC;
+#endif
+}
+
+HIDDEN ia64_loc_t
+ia64_scratch_loc (struct cursor *c, unw_regnum_t reg, uint8_t *nat_bitnr)
+{
+  if (c->sigcontext_addr)
+    {
+      if (ia64_get_abi (c) == ABI_LINUX)
+        return linux_scratch_loc (c, reg, nat_bitnr);
+      else if (ia64_get_abi (c) ==  ABI_HPUX)
+        return hpux_scratch_loc (c, reg, nat_bitnr);
+      else
+        return IA64_NULL_LOC;
+    }
+  else
+    return IA64_REG_LOC (c, reg);
+}
+
+static inline int
+update_nat (struct cursor *c, ia64_loc_t nat_loc, unw_word_t mask,
+            unw_word_t *valp, int write)
+{
+  unw_word_t nat_word;
+  int ret;
+
+  ret = ia64_get (c, nat_loc, &nat_word);
+  if (ret < 0)
+    return ret;
+
+  if (write)
+    {
+      if (*valp)
+        nat_word |= mask;
+      else
+        nat_word &= ~mask;
+      ret = ia64_put (c, nat_loc, nat_word);
+    }
+  else
+    *valp = (nat_word & mask) != 0;
+  return ret;
+}
+
+static int
+access_nat (struct cursor *c,
+            ia64_loc_t nat_loc, ia64_loc_t reg_loc, uint8_t nat_bitnr,
+            unw_word_t *valp, int write)
+{
+  unw_word_t mask = 0;
+  unw_fpreg_t tmp;
+  int ret;
+
+  if (IA64_IS_FP_LOC (reg_loc))
+    {
+      /* NaT bit is saved as a NaTVal.  This happens when a general
+         register is saved to a floating-point register.  */
+      if (write)
+        {
+          if (*valp)
+            {
+              if (ia64_is_big_endian (c))
+                ret = ia64_putfp (c, reg_loc, unw.nat_val_be);
+              else
+                ret = ia64_putfp (c, reg_loc, unw.nat_val_le);
+            }
+          else
+            {
+              unw_word_t *src, *dst;
+              unw_fpreg_t tmp;
+
+              ret = ia64_getfp (c, reg_loc, &tmp);
+              if (ret < 0)
+                return ret;
+
+              /* Reset the exponent to 0x1003e so that the significand
+                 will be interpreted as an integer value.  */
+              src = (unw_word_t *) &unw.int_val_be;
+              dst = (unw_word_t *) &tmp;
+              if (!ia64_is_big_endian (c))
+                ++src, ++dst;
+              *dst = *src;
+
+              ret = ia64_putfp (c, reg_loc, tmp);
+            }
+        }
+      else
+        {
+          ret = ia64_getfp (c, reg_loc, &tmp);
+          if (ret < 0)
+            return ret;
+
+          if (ia64_is_big_endian (c))
+            *valp = (memcmp (&tmp, &unw.nat_val_be, sizeof (tmp)) == 0);
+          else
+            *valp = (memcmp (&tmp, &unw.nat_val_le, sizeof (tmp)) == 0);
+        }
+      return ret;
+    }
+
+  if ((IA64_IS_REG_LOC (nat_loc)
+       && (unsigned) (IA64_GET_REG (nat_loc) - UNW_IA64_NAT) < 128)
+      || IA64_IS_UC_LOC (reg_loc))
+    {
+      if (write)
+        return ia64_put (c, nat_loc, *valp);
+      else
+        return ia64_get (c, nat_loc, valp);
+    }
+
+  if (IA64_IS_NULL_LOC (nat_loc))
+    {
+      /* NaT bit is not saved. This happens if a general register is
+         saved to a branch register.  Since the NaT bit gets lost, we
+         need to drop it here, too.  Note that if the NaT bit had been
+         set when the save occurred, it would have caused a NaT
+         consumption fault.  */
+      if (write)
+        {
+          if (*valp)
+            return -UNW_EBADREG;        /* can't set NaT bit */
+        }
+      else
+        *valp = 0;
+      return 0;
+    }
+
+  mask = (unw_word_t) 1 << nat_bitnr;
+  return update_nat (c, nat_loc, mask, valp, write);
+}
+
+HIDDEN int
+tdep_access_reg (struct cursor *c, unw_regnum_t reg, unw_word_t *valp,
+                 int write)
+{
+  ia64_loc_t loc, reg_loc, nat_loc;
+  unw_word_t mask, val;
+  uint8_t nat_bitnr;
+  int ret;
+
+  switch (reg)
+    {
+      /* frame registers: */
+
+    case UNW_IA64_BSP:
+      if (write)
+        c->bsp = *valp;
+      else
+        *valp = c->bsp;
+      return 0;
+
+    case UNW_REG_SP:
+      if (write)
+        c->sp = *valp;
+      else
+        *valp = c->sp;
+      return 0;
+
+    case UNW_REG_IP:
+      if (write)
+        {
+          c->ip = *valp;        /* also update the IP cache */
+          if (c->pi_valid && (*valp < c->pi.start_ip || *valp >= c->pi.end_ip))
+            c->pi_valid = 0;    /* new IP outside of current proc */
+        }
+      loc = c->loc[IA64_REG_IP];
+      break;
+
+      /* preserved registers: */
+
+    case UNW_IA64_GR + 4 ... UNW_IA64_GR + 7:
+      loc = c->loc[IA64_REG_R4 + (reg - (UNW_IA64_GR + 4))];
+      break;
+
+    case UNW_IA64_NAT + 4 ... UNW_IA64_NAT + 7:
+      loc = c->loc[IA64_REG_NAT4 + (reg - (UNW_IA64_NAT + 4))];
+      reg_loc = c->loc[IA64_REG_R4 + (reg - (UNW_IA64_NAT + 4))];
+      nat_bitnr = c->nat_bitnr[reg - (UNW_IA64_NAT + 4)];
+      return access_nat (c, loc, reg_loc, nat_bitnr, valp, write);
+
+    case UNW_IA64_AR_BSP:       loc = c->loc[IA64_REG_BSP]; break;
+    case UNW_IA64_AR_BSPSTORE:  loc = c->loc[IA64_REG_BSPSTORE]; break;
+    case UNW_IA64_AR_PFS:       loc = c->loc[IA64_REG_PFS]; break;
+    case UNW_IA64_AR_RNAT:      loc = c->loc[IA64_REG_RNAT]; break;
+    case UNW_IA64_AR_UNAT:      loc = c->loc[IA64_REG_UNAT]; break;
+    case UNW_IA64_AR_LC:        loc = c->loc[IA64_REG_LC]; break;
+    case UNW_IA64_AR_FPSR:      loc = c->loc[IA64_REG_FPSR]; break;
+    case UNW_IA64_BR + 1:       loc = c->loc[IA64_REG_B1]; break;
+    case UNW_IA64_BR + 2:       loc = c->loc[IA64_REG_B2]; break;
+    case UNW_IA64_BR + 3:       loc = c->loc[IA64_REG_B3]; break;
+    case UNW_IA64_BR + 4:       loc = c->loc[IA64_REG_B4]; break;
+    case UNW_IA64_BR + 5:       loc = c->loc[IA64_REG_B5]; break;
+
+    case UNW_IA64_CFM:
+      if (write)
+        c->cfm = *valp; /* also update the CFM cache */
+      loc = c->cfm_loc;
+      break;
+
+    case UNW_IA64_PR:
+      /*
+       * Note: broad-side access to the predicates is NOT rotated
+       * (i.e., it is done as if CFM.rrb.pr == 0.
+       */
+      if (write)
+        {
+          c->pr = *valp;                /* update the predicate cache */
+          return ia64_put (c, c->loc[IA64_REG_PR], *valp);
+        }
+      else
+        return ia64_get (c, c->loc[IA64_REG_PR], valp);
+
+    case UNW_IA64_GR + 32 ... UNW_IA64_GR + 127:        /* stacked reg */
+      reg = rotate_gr (c, reg - UNW_IA64_GR);
+      if (reg < 0)
+        return -UNW_EBADREG;
+      ret = ia64_get_stacked (c, reg, &loc, NULL);
+      if (ret < 0)
+        return ret;
+      break;
+
+    case UNW_IA64_NAT + 32 ... UNW_IA64_NAT + 127:      /* stacked reg */
+      reg = rotate_gr (c, reg - UNW_IA64_NAT);
+      if (reg < 0)
+        return -UNW_EBADREG;
+      ret = ia64_get_stacked (c, reg, &loc, &nat_loc);
+      if (ret < 0)
+        return ret;
+      assert (!IA64_IS_REG_LOC (loc));
+      mask = (unw_word_t) 1 << rse_slot_num (IA64_GET_ADDR (loc));
+      return update_nat (c, nat_loc, mask, valp, write);
+
+    case UNW_IA64_AR_EC:
+      if ((ret = ia64_get (c, c->ec_loc, &val)) < 0)
+        return ret;
+
+      if (write)
+        {
+          val = ((val & ~((unw_word_t) 0x3f << 52)) | ((*valp & 0x3f) << 52));
+          return ia64_put (c, c->ec_loc, val);
+        }
+      else
+        {
+          *valp = (val >> 52) & 0x3f;
+          return 0;
+        }
+
+      /* scratch & special registers: */
+
+    case UNW_IA64_GR + 0:
+      if (write)
+        return -UNW_EREADONLYREG;
+      *valp = 0;
+      return 0;
+
+    case UNW_IA64_NAT + 0:
+      if (write)
+        return -UNW_EREADONLYREG;
+      *valp = 0;
+      return 0;
+
+    case UNW_IA64_NAT + 1:
+    case UNW_IA64_NAT + 2 ... UNW_IA64_NAT + 3:
+    case UNW_IA64_NAT + 8 ... UNW_IA64_NAT + 31:
+      loc = ia64_scratch_loc (c, reg, &nat_bitnr);
+      if (IA64_IS_NULL_LOC (loc) && reg == UNW_IA64_NAT + 1)
+        {
+          /* access to GP */
+          if (write)
+            return -UNW_EREADONLYREG;
+          *valp = 0;
+          return 0;
+        }
+      if (!(IA64_IS_REG_LOC (loc) || IA64_IS_UC_LOC (loc)
+            || IA64_IS_FP_LOC (loc)))
+        /* We're dealing with a NaT bit stored in memory.  */
+        return update_nat(c, loc, (unw_word_t) 1 << nat_bitnr, valp, write);
+      break;
+
+    case UNW_IA64_GR + 15 ... UNW_IA64_GR + 18:
+      mask = 1 << (reg - (UNW_IA64_GR + 15));
+      if (write)
+        {
+          c->eh_args[reg - (UNW_IA64_GR + 15)] = *valp;
+          c->eh_valid_mask |= mask;
+          return 0;
+        }
+      else if ((c->eh_valid_mask & mask) != 0)
+        {
+          *valp = c->eh_args[reg - (UNW_IA64_GR + 15)];
+          return 0;
+        }
+      else
+        loc = ia64_scratch_loc (c, reg, NULL);
+      break;
+
+    case UNW_IA64_GR +  1:                              /* global pointer */
+    case UNW_IA64_GR +  2 ... UNW_IA64_GR + 3:
+    case UNW_IA64_GR +  8 ... UNW_IA64_GR + 14:
+    case UNW_IA64_GR + 19 ... UNW_IA64_GR + 31:
+    case UNW_IA64_BR + 0:
+    case UNW_IA64_BR + 6:
+    case UNW_IA64_BR + 7:
+    case UNW_IA64_AR_RSC:
+    case UNW_IA64_AR_CSD:
+    case UNW_IA64_AR_SSD:
+    case UNW_IA64_AR_CCV:
+      loc = ia64_scratch_loc (c, reg, NULL);
+      if (IA64_IS_NULL_LOC (loc) && reg == UNW_IA64_GR + 1)
+        {
+          /* access to GP */
+          if (write)
+            return -UNW_EREADONLYREG;
+
+          /* ensure c->pi is up-to-date: */
+          if ((ret = ia64_make_proc_info (c)) < 0)
+            return ret;
+          *valp = c->pi.gp;
+          return 0;
+        }
+      break;
+
+    default:
+      Debug (1, "bad register number %d\n", reg);
+      return -UNW_EBADREG;
+    }
+
+  if (write)
+    return ia64_put (c, loc, *valp);
+  else
+    return ia64_get (c, loc, valp);
+}
+
+HIDDEN int
+tdep_access_fpreg (struct cursor *c, int reg, unw_fpreg_t *valp,
+                   int write)
+{
+  ia64_loc_t loc;
+
+  switch (reg)
+    {
+    case UNW_IA64_FR + 0:
+      if (write)
+        return -UNW_EREADONLYREG;
+      *valp = unw.read_only.f0;
+      return 0;
+
+    case UNW_IA64_FR + 1:
+      if (write)
+        return -UNW_EREADONLYREG;
+
+      if (ia64_is_big_endian (c))
+        *valp = unw.read_only.f1_be;
+      else
+        *valp = unw.read_only.f1_le;
+      return 0;
+
+    case UNW_IA64_FR + 2: loc = c->loc[IA64_REG_F2]; break;
+    case UNW_IA64_FR + 3: loc = c->loc[IA64_REG_F3]; break;
+    case UNW_IA64_FR + 4: loc = c->loc[IA64_REG_F4]; break;
+    case UNW_IA64_FR + 5: loc = c->loc[IA64_REG_F5]; break;
+
+    case UNW_IA64_FR + 16 ... UNW_IA64_FR + 31:
+      loc = c->loc[IA64_REG_F16 + (reg - (UNW_IA64_FR + 16))];
+      break;
+
+    case UNW_IA64_FR + 6 ... UNW_IA64_FR + 15:
+      loc = ia64_scratch_loc (c, reg, NULL);
+      break;
+
+    case UNW_IA64_FR + 32 ... UNW_IA64_FR + 127:
+      reg = rotate_fr (c, reg - UNW_IA64_FR) + UNW_IA64_FR;
+      loc = ia64_scratch_loc (c, reg, NULL);
+      break;
+
+    default:
+      Debug (1, "bad register number %d\n", reg);
+      return -UNW_EBADREG;
+    }
+
+  if (write)
+    return ia64_putfp (c, loc, *valp);
+  else
+    return ia64_getfp (c, loc, valp);
+}
diff --git a/src/third_party/unwind/dist/src/ia64/Gresume.c b/src/third_party/unwind/dist/src/ia64/Gresume.c
new file mode 100644
index 00000000000..68fe8a659ef
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Gresume.c
@@ -0,0 +1,274 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <stdlib.h>
+
+#include "unwind_i.h"
+#include "offsets.h"
+
+#ifndef UNW_REMOTE_ONLY
+
+static inline int
+local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg)
+{
+#if defined(__linux)
+  unw_word_t dirty_partition[2048]; /* AR.RSC.LOADRS is a 14-bit field */
+  unw_word_t val, sol, sof, pri_unat, n, pfs, bspstore, dirty_rnat;
+  struct cursor *c = (struct cursor *) cursor;
+  struct
+    {
+      unw_word_t r1;
+      unw_word_t r4;
+      unw_word_t r5;
+      unw_word_t r6;
+      unw_word_t r7;
+      unw_word_t r15;
+      unw_word_t r16;
+      unw_word_t r17;
+      unw_word_t r18;
+    }
+  extra;
+  int ret, dirty_size;
+# define GET_NAT(n)                                             \
+  do                                                            \
+    {                                                           \
+      ret = tdep_access_reg (c, UNW_IA64_NAT + (n), &val, 0);   \
+      if (ret < 0)                                              \
+        return ret;                                             \
+      if (val)                                                  \
+        pri_unat |= (unw_word_t) 1 << n;                        \
+    }                                                           \
+  while (0)
+
+  /* ensure c->pi is up-to-date: */
+  if ((ret = ia64_make_proc_info (c)) < 0)
+    return ret;
+
+  /* Copy contents of r4-r7 into "extra", so that their values end up
+     contiguous, so we can use a single (primary-) UNaT value.  */
+  if ((ret = ia64_get (c, c->loc[IA64_REG_R4], &extra.r4)) < 0
+      || (ret = ia64_get (c, c->loc[IA64_REG_R5], &extra.r5)) < 0
+      || (ret = ia64_get (c, c->loc[IA64_REG_R6], &extra.r6)) < 0
+      || (ret = ia64_get (c, c->loc[IA64_REG_R7], &extra.r7)) < 0)
+    return ret;
+
+  /* Form the primary UNaT value: */
+  pri_unat = 0;
+  GET_NAT (4); GET_NAT(5);
+  GET_NAT (6); GET_NAT(7);
+  n = (((uintptr_t) &extra.r4) / 8 - 4) % 64;
+  pri_unat = (pri_unat << n) | (pri_unat >> (64 - n));
+
+  if (unlikely (c->sigcontext_addr))
+    {
+      struct sigcontext *sc = (struct sigcontext *) c->sigcontext_addr;
+#     define PR_SCRATCH         0xffc0  /* p6-p15 are scratch */
+#     define PR_PRESERVED       (~(PR_SCRATCH | 1))
+
+      /* We're returning to a frame that was (either directly or
+         indirectly) interrupted by a signal.  We have to restore
+         _both_ "preserved" and "scratch" registers.  That doesn't
+         leave us any registers to work with, and the only way we can
+         achieve this is by doing a sigreturn().
+
+         Note: it might be tempting to think that we don't have to
+         restore the scratch registers when returning to a frame that
+         was indirectly interrupted by a signal.  However, that is not
+         safe because that frame and its descendants could have been
+         using a special convention that stores "preserved" state in
+         scratch registers.  For example, the Linux fsyscall
+         convention does this with r11 (to save ar.pfs) and b6 (to
+         save "rp"). */
+
+      sc->sc_gr[12] = c->psp;
+      c->psp = c->sigcontext_addr - c->sigcontext_off;
+
+      sof = (c->cfm & 0x7f);
+      if ((dirty_size = rbs_cover_and_flush (c, sof, dirty_partition,
+                                             &dirty_rnat, &bspstore)) < 0)
+        return dirty_size;
+
+      /* Clear the "in-syscall" flag, because in general we won't be
+         returning to the interruption-point and we need all registers
+         restored.  */
+      sc->sc_flags &= ~IA64_SC_FLAG_IN_SYSCALL;
+      sc->sc_ip = c->ip;
+      sc->sc_cfm = c->cfm & (((unw_word_t) 1 << 38) - 1);
+      sc->sc_pr = (c->pr & ~PR_SCRATCH) | (sc->sc_pr & ~PR_PRESERVED);
+      if ((ret = ia64_get (c, c->loc[IA64_REG_PFS], &sc->sc_ar_pfs)) < 0
+          || (ret = ia64_get (c, c->loc[IA64_REG_FPSR], &sc->sc_ar_fpsr)) < 0
+          || (ret = ia64_get (c, c->loc[IA64_REG_UNAT], &sc->sc_ar_unat)) < 0)
+        return ret;
+
+      sc->sc_gr[1] = c->pi.gp;
+      if (c->eh_valid_mask & 0x1) sc->sc_gr[15] = c->eh_args[0];
+      if (c->eh_valid_mask & 0x2) sc->sc_gr[16] = c->eh_args[1];
+      if (c->eh_valid_mask & 0x4) sc->sc_gr[17] = c->eh_args[2];
+      if (c->eh_valid_mask & 0x8) sc->sc_gr[18] = c->eh_args[3];
+      Debug (9, "sc: r15=%lx,r16=%lx,r17=%lx,r18=%lx\n",
+             (long) sc->sc_gr[15], (long) sc->sc_gr[16],
+             (long) sc->sc_gr[17], (long) sc->sc_gr[18]);
+    }
+  else
+    {
+      /* Account for the fact that _Uia64_install_context() will
+         return via br.ret, which will decrement bsp by size-of-locals.  */
+      if ((ret = ia64_get (c, c->loc[IA64_REG_PFS], &pfs)) < 0)
+        return ret;
+      sol = (pfs >> 7) & 0x7f;
+      if ((dirty_size = rbs_cover_and_flush (c, sol, dirty_partition,
+                                             &dirty_rnat, &bspstore)) < 0)
+        return dirty_size;
+
+      extra.r1 = c->pi.gp;
+      extra.r15 = c->eh_args[0];
+      extra.r16 = c->eh_args[1];
+      extra.r17 = c->eh_args[2];
+      extra.r18 = c->eh_args[3];
+      Debug (9, "extra: r15=%lx,r16=%lx,r17=%lx,r18=%lx\n",
+             (long) extra.r15, (long) extra.r16,
+             (long) extra.r17, (long) extra.r18);
+    }
+  Debug (8, "resuming at ip=%lx\n", (long) c->ip);
+  ia64_install_cursor (c, pri_unat, (unw_word_t *) &extra,
+                       bspstore, dirty_size, dirty_partition + dirty_size/8,
+                       dirty_rnat);
+#elif defined(__hpux)
+  struct cursor *c = (struct cursor *) cursor;
+
+  setcontext (c->as_arg);       /* should not return */
+#endif
+  return -UNW_EINVAL;
+}
+
+HIDDEN int
+ia64_local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg)
+{
+  return local_resume (as, cursor, arg);
+}
+
+#endif /* !UNW_REMOTE_ONLY */
+
+#ifndef UNW_LOCAL_ONLY
+
+static inline int
+remote_install_cursor (struct cursor *c)
+{
+  int (*access_reg) (unw_addr_space_t, unw_regnum_t, unw_word_t *,
+                     int write, void *);
+  int (*access_fpreg) (unw_addr_space_t, unw_regnum_t, unw_fpreg_t *,
+                       int write, void *);
+  unw_fpreg_t fpval;
+  unw_word_t val;
+  int reg;
+
+#if defined(__linux) && !defined(UNW_REMOTE_ONLY)
+  if (c->as == unw_local_addr_space)
+    {
+      /* Take a short-cut: we directly resume out of the cursor and
+         all we need to do is make sure that all locations point to
+         memory, not registers.  Furthermore, R4-R7 and NAT4-NAT7 are
+         taken care of by ia64_local_resume() so they don't need to be
+         handled here.  */
+#     define MEMIFY(preg, reg)                                           \
+      do {                                                               \
+        if (IA64_IS_REG_LOC (c->loc[(preg)]))                            \
+          c->loc[(preg)] = IA64_LOC_ADDR ((unw_word_t)                   \
+                                          tdep_uc_addr(c->as_arg, (reg), \
+                                                       NULL), 0);        \
+      } while (0)
+      MEMIFY (IA64_REG_PR,      UNW_IA64_PR);
+      MEMIFY (IA64_REG_PFS,     UNW_IA64_AR_PFS);
+      MEMIFY (IA64_REG_RNAT,    UNW_IA64_AR_RNAT);
+      MEMIFY (IA64_REG_UNAT,    UNW_IA64_AR_UNAT);
+      MEMIFY (IA64_REG_LC,      UNW_IA64_AR_LC);
+      MEMIFY (IA64_REG_FPSR,    UNW_IA64_AR_FPSR);
+      MEMIFY (IA64_REG_IP,      UNW_IA64_BR + 0);
+      MEMIFY (IA64_REG_B1,      UNW_IA64_BR + 1);
+      MEMIFY (IA64_REG_B2,      UNW_IA64_BR + 2);
+      MEMIFY (IA64_REG_B3,      UNW_IA64_BR + 3);
+      MEMIFY (IA64_REG_B4,      UNW_IA64_BR + 4);
+      MEMIFY (IA64_REG_B5,      UNW_IA64_BR + 5);
+      MEMIFY (IA64_REG_F2,      UNW_IA64_FR + 2);
+      MEMIFY (IA64_REG_F3,      UNW_IA64_FR + 3);
+      MEMIFY (IA64_REG_F4,      UNW_IA64_FR + 4);
+      MEMIFY (IA64_REG_F5,      UNW_IA64_FR + 5);
+      MEMIFY (IA64_REG_F16,     UNW_IA64_FR + 16);
+      MEMIFY (IA64_REG_F17,     UNW_IA64_FR + 17);
+      MEMIFY (IA64_REG_F18,     UNW_IA64_FR + 18);
+      MEMIFY (IA64_REG_F19,     UNW_IA64_FR + 19);
+      MEMIFY (IA64_REG_F20,     UNW_IA64_FR + 20);
+      MEMIFY (IA64_REG_F21,     UNW_IA64_FR + 21);
+      MEMIFY (IA64_REG_F22,     UNW_IA64_FR + 22);
+      MEMIFY (IA64_REG_F23,     UNW_IA64_FR + 23);
+      MEMIFY (IA64_REG_F24,     UNW_IA64_FR + 24);
+      MEMIFY (IA64_REG_F25,     UNW_IA64_FR + 25);
+      MEMIFY (IA64_REG_F26,     UNW_IA64_FR + 26);
+      MEMIFY (IA64_REG_F27,     UNW_IA64_FR + 27);
+      MEMIFY (IA64_REG_F28,     UNW_IA64_FR + 28);
+      MEMIFY (IA64_REG_F29,     UNW_IA64_FR + 29);
+      MEMIFY (IA64_REG_F30,     UNW_IA64_FR + 30);
+      MEMIFY (IA64_REG_F31,     UNW_IA64_FR + 31);
+    }
+  else
+#endif /* __linux && !UNW_REMOTE_ONLY */
+    {
+      access_reg = c->as->acc.access_reg;
+      access_fpreg = c->as->acc.access_fpreg;
+
+      Debug (8, "copying out cursor state\n");
+
+      for (reg = 0; reg <= UNW_REG_LAST; ++reg)
+        {
+          if (unw_is_fpreg (reg))
+            {
+              if (tdep_access_fpreg (c, reg, &fpval, 0) >= 0)
+                (*access_fpreg) (c->as, reg, &fpval, 1, c->as_arg);
+            }
+          else
+            {
+              if (tdep_access_reg (c, reg, &val, 0) >= 0)
+                (*access_reg) (c->as, reg, &val, 1, c->as_arg);
+            }
+        }
+    }
+  return (*c->as->acc.resume) (c->as, (unw_cursor_t *) c, c->as_arg);
+}
+
+#endif /* !UNW_LOCAL_ONLY */
+
+int
+unw_resume (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  Debug (1, "(cursor=%p, ip=0x%016lx)\n", c, (unsigned long) c->ip);
+
+#ifdef UNW_LOCAL_ONLY
+  return local_resume (c->as, cursor, c->as_arg);
+#else
+  return remote_install_cursor (c);
+#endif
+}
diff --git a/src/third_party/unwind/dist/src/ia64/Gscript.c b/src/third_party/unwind/dist/src/ia64/Gscript.c
new file mode 100644
index 00000000000..526aeaf299e
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Gscript.c
@@ -0,0 +1,765 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "offsets.h"
+#include "regs.h"
+#include "unwind_i.h"
+
+enum ia64_script_insn_opcode
+  {
+    IA64_INSN_INC_PSP,          /* psp += val */
+    IA64_INSN_LOAD_PSP,         /* psp = *psp_loc */
+    IA64_INSN_ADD_PSP,          /* s[dst] = (s.psp + val) */
+    IA64_INSN_ADD_PSP_NAT,      /* like above, but with NaT info */
+    IA64_INSN_ADD_SP,           /* s[dst] = (s.sp + val) */
+    IA64_INSN_ADD_SP_NAT,       /* like above, but with NaT info */
+    IA64_INSN_MOVE,             /* s[dst] = s[val] */
+    IA64_INSN_MOVE_NAT,         /* like above, but with NaT info */
+    IA64_INSN_MOVE_NO_NAT,      /* like above, but clear NaT info */
+    IA64_INSN_MOVE_STACKED,     /* s[dst] = rse_skip(*s.bsp_loc, val) */
+    IA64_INSN_MOVE_STACKED_NAT, /* like above, but with NaT info */
+    IA64_INSN_MOVE_SCRATCH,     /* s[dst] = scratch reg "val" */
+    IA64_INSN_MOVE_SCRATCH_NAT, /* like above, but with NaT info */
+    IA64_INSN_MOVE_SCRATCH_NO_NAT /* like above, but clear NaT info */
+  };
+
+#if defined(HAVE___THREAD) && HAVE___THREAD
+static __thread struct ia64_script_cache ia64_per_thread_cache =
+  {
+#ifdef HAVE_ATOMIC_OPS_H
+    .busy = AO_TS_INITIALIZER
+#else
+    .lock = PTHREAD_MUTEX_INITIALIZER
+#endif
+  };
+#endif
+
+static inline unw_hash_index_t CONST_ATTR
+hash (unw_word_t ip)
+{
+  /* based on (sqrt(5)/2-1)*2^64 */
+# define magic  ((unw_word_t) 0x9e3779b97f4a7c16ULL)
+
+  return (ip >> 4) * magic >> (64 - IA64_LOG_UNW_HASH_SIZE);
+}
+
+static inline long
+cache_match (struct ia64_script *script, unw_word_t ip, unw_word_t pr)
+{
+  if (ip == script->ip && ((pr ^ script->pr_val) & script->pr_mask) == 0)
+    return 1;
+  return 0;
+}
+
+static inline void
+flush_script_cache (struct ia64_script_cache *cache)
+{
+  int i;
+
+  cache->lru_head = IA64_UNW_CACHE_SIZE - 1;
+  cache->lru_tail = 0;
+
+  for (i = 0; i < IA64_UNW_CACHE_SIZE; ++i)
+    {
+      if (i > 0)
+        cache->buckets[i].lru_chain = (i - 1);
+      cache->buckets[i].coll_chain = -1;
+      cache->buckets[i].ip = 0;
+    }
+  for (i = 0; i<IA64_UNW_HASH_SIZE; ++i)
+    cache->hash[i] = -1;
+}
+
+static inline struct ia64_script_cache *
+get_script_cache (unw_addr_space_t as, intrmask_t *saved_maskp)
+{
+  struct ia64_script_cache *cache = &as->global_cache;
+  unw_caching_policy_t caching = as->caching_policy;
+
+  if (caching == UNW_CACHE_NONE)
+    return NULL;
+
+#ifdef HAVE_ATOMIC_H
+  if (!spin_trylock_irqsave (&cache->busy, *saved_maskp))
+    return NULL;
+#else
+# if defined(HAVE___THREAD) && HAVE___THREAD
+  if (as->caching_policy == UNW_CACHE_PER_THREAD)
+    cache = &ia64_per_thread_cache;
+# endif
+# ifdef HAVE_ATOMIC_OPS_H
+  if (AO_test_and_set (&cache->busy) == AO_TS_SET)
+    return NULL;
+# else
+  if (likely (caching == UNW_CACHE_GLOBAL))
+    {
+      Debug (16, "acquiring lock\n");
+      lock_acquire (&cache->lock, *saved_maskp);
+    }
+# endif
+#endif
+
+  if (atomic_read (&as->cache_generation) != atomic_read (&cache->generation))
+    {
+      flush_script_cache (cache);
+      cache->generation = as->cache_generation;
+    }
+  return cache;
+}
+
+static inline void
+put_script_cache (unw_addr_space_t as, struct ia64_script_cache *cache,
+                  intrmask_t *saved_maskp)
+{
+  assert (as->caching_policy != UNW_CACHE_NONE);
+
+  Debug (16, "unmasking signals/interrupts and releasing lock\n");
+#ifdef HAVE_ATOMIC_H
+  spin_unlock_irqrestore (&cache->busy, *saved_maskp);
+#else
+# ifdef HAVE_ATOMIC_OPS_H
+  AO_CLEAR (&cache->busy);
+# else
+  if (likely (as->caching_policy == UNW_CACHE_GLOBAL))
+    lock_release (&cache->lock, *saved_maskp);
+# endif
+#endif
+}
+
+static struct ia64_script *
+script_lookup (struct ia64_script_cache *cache, struct cursor *c)
+{
+  struct ia64_script *script = cache->buckets + c->hint;
+  unsigned short index;
+  unw_word_t ip, pr;
+
+  ip = c->ip;
+  pr = c->pr;
+
+  if (cache_match (script, ip, pr))
+    return script;
+
+  index = cache->hash[hash (ip)];
+  if (index >= IA64_UNW_CACHE_SIZE)
+    return 0;
+
+  script = cache->buckets + index;
+  while (1)
+    {
+      if (cache_match (script, ip, pr))
+        {
+          /* update hint; no locking needed: single-word writes are atomic */
+          c->hint = cache->buckets[c->prev_script].hint =
+            (script - cache->buckets);
+          return script;
+        }
+      if (script->coll_chain >= IA64_UNW_HASH_SIZE)
+        return 0;
+      script = cache->buckets + script->coll_chain;
+    }
+}
+
+static inline void
+script_init (struct ia64_script *script, unw_word_t ip)
+{
+  script->ip = ip;
+  script->hint = 0;
+  script->count = 0;
+  script->abi_marker = 0;
+}
+
+static inline struct ia64_script *
+script_new (struct ia64_script_cache *cache, unw_word_t ip)
+{
+  struct ia64_script *script, *prev, *tmp;
+  unw_hash_index_t index;
+  unsigned short head;
+
+  head = cache->lru_head;
+  script = cache->buckets + head;
+  cache->lru_head = script->lru_chain;
+
+  /* re-insert script at the tail of the LRU chain: */
+  cache->buckets[cache->lru_tail].lru_chain = head;
+  cache->lru_tail = head;
+
+  /* remove the old script from the hash table (if it's there): */
+  if (script->ip)
+    {
+      index = hash (script->ip);
+      tmp = cache->buckets + cache->hash[index];
+      prev = 0;
+      while (1)
+        {
+          if (tmp == script)
+            {
+              if (prev)
+                prev->coll_chain = tmp->coll_chain;
+              else
+                cache->hash[index] = tmp->coll_chain;
+              break;
+            }
+          else
+            prev = tmp;
+          if (tmp->coll_chain >= IA64_UNW_CACHE_SIZE)
+            /* old script wasn't in the hash-table */
+            break;
+          tmp = cache->buckets + tmp->coll_chain;
+        }
+    }
+
+  /* enter new script in the hash table */
+  index = hash (ip);
+  script->coll_chain = cache->hash[index];
+  cache->hash[index] = script - cache->buckets;
+
+  script_init (script, ip);
+  return script;
+}
+
+static inline void
+script_finalize (struct ia64_script *script, struct cursor *c,
+                 struct ia64_state_record *sr)
+{
+  script->pr_mask = sr->pr_mask;
+  script->pr_val = sr->pr_val;
+  script->pi = c->pi;
+}
+
+static inline void
+script_emit (struct ia64_script *script, struct ia64_script_insn insn)
+{
+  if (script->count >= IA64_MAX_SCRIPT_LEN)
+    {
+      Dprintf ("%s: script exceeds maximum size of %u instructions!\n",
+               __FUNCTION__, IA64_MAX_SCRIPT_LEN);
+      return;
+    }
+  script->insn[script->count++] = insn;
+}
+
+static void
+compile_reg (struct ia64_state_record *sr, int i, struct ia64_reg_info *r,
+             struct ia64_script *script)
+{
+  enum ia64_script_insn_opcode opc;
+  unsigned long val, rval;
+  struct ia64_script_insn insn;
+  long is_preserved_gr;
+
+  if (r->where == IA64_WHERE_NONE || r->when >= sr->when_target)
+    return;
+
+  opc = IA64_INSN_MOVE;
+  val = rval = r->val;
+  is_preserved_gr = (i >= IA64_REG_R4 && i <= IA64_REG_R7);
+
+  if (r->where == IA64_WHERE_GR)
+    {
+      /* Handle most common case first... */
+      if (rval >= 32)
+        {
+          /* register got spilled to a stacked register */
+          if (is_preserved_gr)
+            opc = IA64_INSN_MOVE_STACKED_NAT;
+          else
+            opc = IA64_INSN_MOVE_STACKED;
+          val = rval;
+        }
+      else if (rval >= 4 && rval <= 7)
+        {
+          /* register got spilled to a preserved register */
+          val = IA64_REG_R4 + (rval - 4);
+          if (is_preserved_gr)
+            opc = IA64_INSN_MOVE_NAT;
+        }
+      else
+        {
+          /* register got spilled to a scratch register */
+          if (is_preserved_gr)
+            opc = IA64_INSN_MOVE_SCRATCH_NAT;
+          else
+            opc = IA64_INSN_MOVE_SCRATCH;
+          val = UNW_IA64_GR + rval;
+        }
+    }
+  else
+    {
+      switch (r->where)
+        {
+        case IA64_WHERE_FR:
+          /* Note: There is no need to handle NaT-bit info here
+             (indepent of is_preserved_gr), because for floating-point
+             NaTs are represented as NaTVal, so the NaT-info never
+             needs to be consulated.  */
+          if (rval >= 2 && rval <= 5)
+            val = IA64_REG_F2 + (rval - 2);
+          else if (rval >= 16 && rval <= 31)
+            val = IA64_REG_F16 + (rval - 16);
+          else
+            {
+              opc = IA64_INSN_MOVE_SCRATCH;
+              val = UNW_IA64_FR + rval;
+            }
+          break;
+
+        case IA64_WHERE_BR:
+          if (rval >= 1 && rval <= 5)
+            {
+              val = IA64_REG_B1 + (rval - 1);
+              if (is_preserved_gr)
+                opc = IA64_INSN_MOVE_NO_NAT;
+            }
+          else
+            {
+              opc = IA64_INSN_MOVE_SCRATCH;
+              if (is_preserved_gr)
+                opc = IA64_INSN_MOVE_SCRATCH_NO_NAT;
+              val = UNW_IA64_BR + rval;
+            }
+          break;
+
+        case IA64_WHERE_SPREL:
+          if (is_preserved_gr)
+            opc = IA64_INSN_ADD_SP_NAT;
+          else
+            {
+              opc = IA64_INSN_ADD_SP;
+              if (i >= IA64_REG_F2 && i <= IA64_REG_F31)
+                val |= IA64_LOC_TYPE_FP;
+            }
+          break;
+
+        case IA64_WHERE_PSPREL:
+          if (is_preserved_gr)
+            opc = IA64_INSN_ADD_PSP_NAT;
+          else
+            {
+              opc = IA64_INSN_ADD_PSP;
+              if (i >= IA64_REG_F2 && i <= IA64_REG_F31)
+                val |= IA64_LOC_TYPE_FP;
+            }
+          break;
+
+        default:
+          Dprintf ("%s: register %u has unexpected `where' value of %u\n",
+                   __FUNCTION__, i, r->where);
+          break;
+        }
+    }
+  insn.opc = opc;
+  insn.dst = i;
+  insn.val = val;
+  script_emit (script, insn);
+
+  if (i == IA64_REG_PSP)
+    {
+      /* c->psp must contain the _value_ of the previous sp, not it's
+         save-location.  We get this by dereferencing the value we
+         just stored in loc[IA64_REG_PSP]: */
+      insn.opc = IA64_INSN_LOAD_PSP;
+      script_emit (script, insn);
+    }
+}
+
+/* Sort the registers which got saved in decreasing order of WHEN
+   value.  This is needed to ensure that the save-locations are
+   updated in the proper order.  For example, suppose r4 gets spilled
+   to memory and then r5 gets saved in r4.  In this case, we need to
+   update the save location of r5 before the one of r4.  */
+
+static inline int
+sort_regs (struct ia64_state_record *sr, int regorder[])
+{
+  int r, i, j, max, max_reg, max_when, num_regs = 0;
+
+  assert (IA64_REG_BSP == 3);
+
+  for (r = IA64_REG_BSP; r < IA64_NUM_PREGS; ++r)
+    {
+      if (sr->curr.reg[r].where == IA64_WHERE_NONE
+          || sr->curr.reg[r].when >= sr->when_target)
+        continue;
+
+      regorder[num_regs++] = r;
+    }
+
+  /* Simple insertion-sort.  Involves about N^2/2 comparisons and N
+     exchanges.  N is often small (say, 2-5) so a fancier sorting
+     algorithm may not be worthwhile.  */
+
+  for (i = max = 0; i < num_regs - 1; ++i)
+    {
+      max_reg = regorder[max];
+      max_when = sr->curr.reg[max_reg].when;
+
+      for (j = i + 1; j < num_regs; ++j)
+        if (sr->curr.reg[regorder[j]].when > max_when)
+          {
+            max = j;
+            max_reg = regorder[j];
+            max_when = sr->curr.reg[max_reg].when;
+          }
+      if (i != max)
+        {
+          regorder[max] = regorder[i];
+          regorder[i] = max_reg;
+        }
+    }
+  return num_regs;
+}
+
+/* Build an unwind script that unwinds from state OLD_STATE to the
+   entrypoint of the function that called OLD_STATE.  */
+
+static inline int
+build_script (struct cursor *c, struct ia64_script *script)
+{
+  int num_regs, i, ret, regorder[IA64_NUM_PREGS - 3];
+  struct ia64_reg_info *pri_unat;
+  struct ia64_state_record sr;
+  struct ia64_script_insn insn;
+
+  ret = ia64_create_state_record (c, &sr);
+  if (ret < 0)
+    return ret;
+
+  /* First, compile the update for IA64_REG_PSP.  This is important
+     because later save-locations may depend on it's correct (updated)
+     value.  Fixed-size frames are handled specially and variable-size
+     frames get handled via the normal compile_reg().  */
+
+  if (sr.when_target > sr.curr.reg[IA64_REG_PSP].when
+      && (sr.curr.reg[IA64_REG_PSP].where == IA64_WHERE_NONE)
+      && sr.curr.reg[IA64_REG_PSP].val != 0)
+    {
+      /* new psp is psp plus frame size */
+      insn.opc = IA64_INSN_INC_PSP;
+      insn.val = sr.curr.reg[IA64_REG_PSP].val; /* frame size */
+      script_emit (script, insn);
+    }
+  else
+    compile_reg (&sr, IA64_REG_PSP, sr.curr.reg + IA64_REG_PSP, script);
+
+  /* Second, compile the update for the primary UNaT, if any: */
+
+  if (sr.when_target >= sr.curr.reg[IA64_REG_PRI_UNAT_GR].when
+      || sr.when_target >= sr.curr.reg[IA64_REG_PRI_UNAT_MEM].when)
+    {
+      if (sr.when_target < sr.curr.reg[IA64_REG_PRI_UNAT_GR].when)
+        /* (primary) NaT bits were saved to memory only */
+        pri_unat = sr.curr.reg + IA64_REG_PRI_UNAT_MEM;
+      else if (sr.when_target < sr.curr.reg[IA64_REG_PRI_UNAT_MEM].when)
+        /* (primary) NaT bits were saved to a register only */
+        pri_unat = sr.curr.reg + IA64_REG_PRI_UNAT_GR;
+      else if (sr.curr.reg[IA64_REG_PRI_UNAT_MEM].when >
+               sr.curr.reg[IA64_REG_PRI_UNAT_GR].when)
+        /* (primary) NaT bits were last saved to memory */
+        pri_unat = sr.curr.reg + IA64_REG_PRI_UNAT_MEM;
+      else
+        /* (primary) NaT bits were last saved to a register */
+        pri_unat = sr.curr.reg + IA64_REG_PRI_UNAT_GR;
+
+      /* Note: we always store the final primary-UNaT location in UNAT_MEM.  */
+      compile_reg (&sr, IA64_REG_PRI_UNAT_MEM, pri_unat, script);
+    }
+
+  /* Third, compile the other register in decreasing order of WHEN values.  */
+
+  num_regs = sort_regs (&sr, regorder);
+  for (i = 0; i < num_regs; ++i)
+    compile_reg (&sr, regorder[i], sr.curr.reg + regorder[i], script);
+
+  script->abi_marker = sr.abi_marker;
+  script_finalize (script, c, &sr);
+
+  ia64_free_state_record (&sr);
+  return 0;
+}
+
+static inline void
+set_nat_info (struct cursor *c, unsigned long dst,
+              ia64_loc_t nat_loc, uint8_t bitnr)
+{
+  assert (dst >= IA64_REG_R4 && dst <= IA64_REG_R7);
+
+  c->loc[dst - IA64_REG_R4 + IA64_REG_NAT4] = nat_loc;
+  c->nat_bitnr[dst - IA64_REG_R4] = bitnr;
+}
+
+/* Apply the unwinding actions represented by OPS and update SR to
+   reflect the state that existed upon entry to the function that this
+   unwinder represents.  */
+
+static inline int
+run_script (struct ia64_script *script, struct cursor *c)
+{
+  struct ia64_script_insn *ip, *limit, next_insn;
+  ia64_loc_t loc, nat_loc;
+  unsigned long opc, dst;
+  uint8_t nat_bitnr;
+  unw_word_t val;
+  int ret;
+
+  c->pi = script->pi;
+  ip = script->insn;
+  limit = script->insn + script->count;
+  next_insn = *ip;
+  c->abi_marker = script->abi_marker;
+
+  while (ip++ < limit)
+    {
+      opc = next_insn.opc;
+      dst = next_insn.dst;
+      val = next_insn.val;
+      next_insn = *ip;
+
+      /* This is by far the most common operation: */
+      if (likely (opc == IA64_INSN_MOVE_STACKED))
+        {
+          if ((ret = ia64_get_stacked (c, val, &loc, NULL)) < 0)
+            return ret;
+        }
+      else
+        switch (opc)
+          {
+          case IA64_INSN_INC_PSP:
+            c->psp += val;
+            continue;
+
+          case IA64_INSN_LOAD_PSP:
+            if ((ret = ia64_get (c, c->loc[IA64_REG_PSP], &c->psp)) < 0)
+              return ret;
+            continue;
+
+          case IA64_INSN_ADD_PSP:
+            loc = IA64_LOC_ADDR (c->psp + val, (val & IA64_LOC_TYPE_FP));
+            break;
+
+          case IA64_INSN_ADD_SP:
+            loc = IA64_LOC_ADDR (c->sp + val, (val & IA64_LOC_TYPE_FP));
+            break;
+
+          case IA64_INSN_MOVE_NO_NAT:
+            set_nat_info (c, dst, IA64_NULL_LOC, 0);
+          case IA64_INSN_MOVE:
+            loc = c->loc[val];
+            break;
+
+          case IA64_INSN_MOVE_SCRATCH_NO_NAT:
+            set_nat_info (c, dst, IA64_NULL_LOC, 0);
+          case IA64_INSN_MOVE_SCRATCH:
+            loc = ia64_scratch_loc (c, val, NULL);
+            break;
+
+          case IA64_INSN_ADD_PSP_NAT:
+            loc = IA64_LOC_ADDR (c->psp + val, 0);
+            assert (!IA64_IS_REG_LOC (loc));
+            set_nat_info (c, dst,
+                          c->loc[IA64_REG_PRI_UNAT_MEM],
+                          ia64_unat_slot_num (IA64_GET_ADDR (loc)));
+            break;
+
+          case IA64_INSN_ADD_SP_NAT:
+            loc = IA64_LOC_ADDR (c->sp + val, 0);
+            assert (!IA64_IS_REG_LOC (loc));
+            set_nat_info (c, dst,
+                          c->loc[IA64_REG_PRI_UNAT_MEM],
+                          ia64_unat_slot_num (IA64_GET_ADDR (loc)));
+            break;
+
+          case IA64_INSN_MOVE_NAT:
+            loc = c->loc[val];
+            set_nat_info (c, dst,
+                          c->loc[val - IA64_REG_R4 + IA64_REG_NAT4],
+                          c->nat_bitnr[val - IA64_REG_R4]);
+            break;
+
+          case IA64_INSN_MOVE_STACKED_NAT:
+            if ((ret = ia64_get_stacked (c, val, &loc, &nat_loc)) < 0)
+              return ret;
+            assert (!IA64_IS_REG_LOC (loc));
+            set_nat_info (c, dst, nat_loc, rse_slot_num (IA64_GET_ADDR (loc)));
+            break;
+
+          case IA64_INSN_MOVE_SCRATCH_NAT:
+            loc = ia64_scratch_loc (c, val, NULL);
+            nat_loc = ia64_scratch_loc (c, val + (UNW_IA64_NAT - UNW_IA64_GR),
+                                        &nat_bitnr);
+            set_nat_info (c, dst, nat_loc, nat_bitnr);
+            break;
+          }
+      c->loc[dst] = loc;
+    }
+  return 0;
+}
+
+static int
+uncached_find_save_locs (struct cursor *c)
+{
+  struct ia64_script script;
+  int ret = 0;
+
+  if ((ret = ia64_fetch_proc_info (c, c->ip, 1)) < 0)
+    return ret;
+
+  script_init (&script, c->ip);
+  if ((ret = build_script (c, &script)) < 0)
+    {
+      if (ret != -UNW_ESTOPUNWIND)
+        Dprintf ("%s: failed to build unwind script for ip %lx\n",
+                 __FUNCTION__, (long) c->ip);
+      return ret;
+    }
+  return run_script (&script, c);
+}
+
+HIDDEN int
+ia64_find_save_locs (struct cursor *c)
+{
+  struct ia64_script_cache *cache = NULL;
+  struct ia64_script *script = NULL;
+  intrmask_t saved_mask;
+  int ret = 0;
+
+  if (c->as->caching_policy == UNW_CACHE_NONE)
+    return uncached_find_save_locs (c);
+
+  cache = get_script_cache (c->as, &saved_mask);
+  if (!cache)
+    {
+      Debug (1, "contention on script-cache; doing uncached lookup\n");
+      return uncached_find_save_locs (c);
+    }
+  {
+    script = script_lookup (cache, c);
+    Debug (8, "ip %lx %s in script cache\n", (long) c->ip,
+           script ? "hit" : "missed");
+
+    if (!script || (script->count == 0 && !script->pi.unwind_info))
+      {
+        if ((ret = ia64_fetch_proc_info (c, c->ip, 1)) < 0)
+          goto out;
+      }
+
+    if (!script)
+      {
+        script = script_new (cache, c->ip);
+        if (!script)
+          {
+            Dprintf ("%s: failed to create unwind script\n", __FUNCTION__);
+            ret = -UNW_EUNSPEC;
+            goto out;
+          }
+      }
+    cache->buckets[c->prev_script].hint = script - cache->buckets;
+
+    if (script->count == 0)
+      ret = build_script (c, script);
+
+    assert (script->count > 0);
+
+    c->hint = script->hint;
+    c->prev_script = script - cache->buckets;
+
+    if (ret < 0)
+      {
+        if (ret != -UNW_ESTOPUNWIND)
+          Dprintf ("%s: failed to locate/build unwind script for ip %lx\n",
+                   __FUNCTION__, (long) c->ip);
+        goto out;
+      }
+
+    ret = run_script (script, c);
+  }
+ out:
+  put_script_cache (c->as, cache, &saved_mask);
+  return ret;
+}
+
+HIDDEN void
+ia64_validate_cache (unw_addr_space_t as, void *arg)
+{
+#ifndef UNW_REMOTE_ONLY
+  if (as == unw_local_addr_space && ia64_local_validate_cache (as, arg) == 1)
+    return;
+#endif
+
+#ifndef UNW_LOCAL_ONLY
+  /* local info is up-to-date, check dynamic info.  */
+  unwi_dyn_validate_cache (as, arg);
+#endif
+}
+
+HIDDEN int
+ia64_cache_proc_info (struct cursor *c)
+{
+  struct ia64_script_cache *cache;
+  struct ia64_script *script;
+  intrmask_t saved_mask;
+  int ret = 0;
+
+  cache = get_script_cache (c->as, &saved_mask);
+  if (!cache)
+    return ret; /* cache is busy */
+
+  /* Re-check to see if a cache entry has been added in the meantime: */
+  script = script_lookup (cache, c);
+  if (script)
+    goto out;
+
+  script = script_new (cache, c->ip);
+  if (!script)
+    {
+      Dprintf ("%s: failed to create unwind script\n", __FUNCTION__);
+      ret = -UNW_EUNSPEC;
+      goto out;
+    }
+
+  script->pi = c->pi;
+
+ out:
+  put_script_cache (c->as, cache, &saved_mask);
+  return ret;
+}
+
+HIDDEN int
+ia64_get_cached_proc_info (struct cursor *c)
+{
+  struct ia64_script_cache *cache;
+  struct ia64_script *script;
+  intrmask_t saved_mask;
+
+  cache = get_script_cache (c->as, &saved_mask);
+  if (!cache)
+    return -UNW_ENOINFO;        /* cache is busy */
+  {
+    script = script_lookup (cache, c);
+    if (script)
+      c->pi = script->pi;
+  }
+  put_script_cache (c->as, cache, &saved_mask);
+  return script ? 0 : -UNW_ENOINFO;
+}
diff --git a/src/third_party/unwind/dist/src/ia64/Gstep.c b/src/third_party/unwind/dist/src/ia64/Gstep.c
new file mode 100644
index 00000000000..df4ecb8796c
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Gstep.c
@@ -0,0 +1,359 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "offsets.h"
+#include "unwind_i.h"
+
+static inline int
+linux_sigtramp (struct cursor *c, ia64_loc_t prev_cfm_loc,
+                unw_word_t *num_regsp)
+{
+#if defined(UNW_LOCAL_ONLY) && !defined(__linux)
+  return -UNW_EINVAL;
+#else
+  unw_word_t sc_addr;
+  int ret;
+
+  if ((ret = ia64_get (c, IA64_LOC_ADDR (c->sp + 0x10
+                                         + LINUX_SIGFRAME_ARG2_OFF, 0),
+                       &sc_addr)) < 0)
+    return ret;
+
+  c->sigcontext_addr = sc_addr;
+
+  if (!IA64_IS_REG_LOC (c->loc[IA64_REG_IP])
+      && IA64_GET_ADDR (c->loc[IA64_REG_IP]) == sc_addr + LINUX_SC_BR_OFF + 8)
+    {
+      /* Linux kernels before 2.4.19 and 2.5.10 had buggy
+         unwind info for sigtramp.  Fix it up here.  */
+      c->loc[IA64_REG_IP]  = IA64_LOC_ADDR (sc_addr + LINUX_SC_IP_OFF, 0);
+      c->cfm_loc = IA64_LOC_ADDR (sc_addr + LINUX_SC_CFM_OFF, 0);
+    }
+
+  /* do what can't be described by unwind directives: */
+  c->loc[IA64_REG_PFS] = IA64_LOC_ADDR (sc_addr + LINUX_SC_AR_PFS_OFF, 0);
+  c->ec_loc = prev_cfm_loc;
+  *num_regsp = c->cfm & 0x7f;           /* size of frame */
+  return 0;
+#endif
+}
+
+static inline int
+linux_interrupt (struct cursor *c, ia64_loc_t prev_cfm_loc,
+                 unw_word_t *num_regsp, int marker)
+{
+#if defined(UNW_LOCAL_ONLY) && !(defined(__linux) && defined(__KERNEL__))
+  return -UNW_EINVAL;
+#else
+  unw_word_t sc_addr, num_regs;
+  ia64_loc_t pfs_loc;
+
+  sc_addr = c->sigcontext_addr = c->sp + 0x10;
+
+  if ((c->pr & (1UL << LINUX_PT_P_NONSYS)) != 0)
+    num_regs = c->cfm & 0x7f;
+  else
+    num_regs = 0;
+
+  /* do what can't be described by unwind directives: */
+  if (marker == ABI_MARKER_OLD_LINUX_INTERRUPT)
+          pfs_loc = IA64_LOC_ADDR (sc_addr + LINUX_OLD_PT_PFS_OFF, 0);
+  else
+          pfs_loc = IA64_LOC_ADDR (sc_addr + LINUX_PT_PFS_OFF, 0);
+  c->loc[IA64_REG_PFS] = pfs_loc;
+  c->ec_loc = prev_cfm_loc;
+  *num_regsp = num_regs;                /* size of frame */
+  return 0;
+#endif
+}
+
+static inline int
+hpux_sigtramp (struct cursor *c, ia64_loc_t prev_cfm_loc,
+               unw_word_t *num_regsp)
+{
+#if defined(UNW_LOCAL_ONLY) && !defined(__hpux)
+  return -UNW_EINVAL;
+#else
+  unw_word_t sc_addr, bsp, bspstore;
+  ia64_loc_t sc_loc;
+  int ret, i;
+
+  /* HP-UX passes the address of ucontext_t in r32: */
+  if ((ret = ia64_get_stacked (c, 32, &sc_loc, NULL)) < 0)
+    return ret;
+  if ((ret = ia64_get (c, sc_loc, &sc_addr)) < 0)
+    return ret;
+
+  c->sigcontext_addr = sc_addr;
+
+  /* Now mark all (preserved) registers as coming from the
+     signal context: */
+  c->cfm_loc = IA64_LOC_UC_REG (UNW_IA64_CFM, sc_addr);
+  c->loc[IA64_REG_PRI_UNAT_MEM] = IA64_NULL_LOC;
+  c->loc[IA64_REG_PSP] = IA64_LOC_UC_REG (UNW_IA64_GR + 12, sc_addr);
+  c->loc[IA64_REG_BSP] = IA64_LOC_UC_REG (UNW_IA64_AR_BSP, sc_addr);
+  c->loc[IA64_REG_BSPSTORE] = IA64_LOC_UC_REG (UNW_IA64_AR_BSPSTORE, sc_addr);
+  c->loc[IA64_REG_PFS] = IA64_LOC_UC_REG (UNW_IA64_AR_PFS, sc_addr);
+  c->loc[IA64_REG_RNAT] = IA64_LOC_UC_REG (UNW_IA64_AR_RNAT, sc_addr);
+  c->loc[IA64_REG_IP] = IA64_LOC_UC_REG (UNW_IA64_IP, sc_addr);
+  c->loc[IA64_REG_R4] = IA64_LOC_UC_REG (UNW_IA64_GR + 4, sc_addr);
+  c->loc[IA64_REG_R5] = IA64_LOC_UC_REG (UNW_IA64_GR + 5, sc_addr);
+  c->loc[IA64_REG_R6] = IA64_LOC_UC_REG (UNW_IA64_GR + 6, sc_addr);
+  c->loc[IA64_REG_R7] = IA64_LOC_UC_REG (UNW_IA64_GR + 7, sc_addr);
+  c->loc[IA64_REG_NAT4] = IA64_LOC_UC_REG (UNW_IA64_NAT + 4, sc_addr);
+  c->loc[IA64_REG_NAT5] = IA64_LOC_UC_REG (UNW_IA64_NAT + 5, sc_addr);
+  c->loc[IA64_REG_NAT6] = IA64_LOC_UC_REG (UNW_IA64_NAT + 6, sc_addr);
+  c->loc[IA64_REG_NAT7] = IA64_LOC_UC_REG (UNW_IA64_NAT + 7, sc_addr);
+  c->loc[IA64_REG_UNAT] = IA64_LOC_UC_REG (UNW_IA64_AR_UNAT, sc_addr);
+  c->loc[IA64_REG_PR] = IA64_LOC_UC_REG (UNW_IA64_PR, sc_addr);
+  c->loc[IA64_REG_LC] = IA64_LOC_UC_REG (UNW_IA64_AR_LC, sc_addr);
+  c->loc[IA64_REG_FPSR] = IA64_LOC_UC_REG (UNW_IA64_AR_FPSR, sc_addr);
+  c->loc[IA64_REG_B1] = IA64_LOC_UC_REG (UNW_IA64_BR + 1, sc_addr);
+  c->loc[IA64_REG_B2] = IA64_LOC_UC_REG (UNW_IA64_BR + 2, sc_addr);
+  c->loc[IA64_REG_B3] = IA64_LOC_UC_REG (UNW_IA64_BR + 3, sc_addr);
+  c->loc[IA64_REG_B4] = IA64_LOC_UC_REG (UNW_IA64_BR + 4, sc_addr);
+  c->loc[IA64_REG_B5] = IA64_LOC_UC_REG (UNW_IA64_BR + 5, sc_addr);
+  c->loc[IA64_REG_F2] = IA64_LOC_UC_REG (UNW_IA64_FR + 2, sc_addr);
+  c->loc[IA64_REG_F3] = IA64_LOC_UC_REG (UNW_IA64_FR + 3, sc_addr);
+  c->loc[IA64_REG_F4] = IA64_LOC_UC_REG (UNW_IA64_FR + 4, sc_addr);
+  c->loc[IA64_REG_F5] = IA64_LOC_UC_REG (UNW_IA64_FR + 5, sc_addr);
+  for (i = 0; i < 16; ++i)
+    c->loc[IA64_REG_F16 + i] = IA64_LOC_UC_REG (UNW_IA64_FR + 16 + i, sc_addr);
+
+  c->pi.flags |= UNW_PI_FLAG_IA64_RBS_SWITCH;
+
+  /* update the CFM cache: */
+  if ((ret = ia64_get (c, c->cfm_loc, &c->cfm)) < 0)
+    return ret;
+  /* update the PSP cache: */
+  if ((ret = ia64_get (c, c->loc[IA64_REG_PSP], &c->psp)) < 0)
+    return ret;
+
+  if ((ret = ia64_get (c, c->loc[IA64_REG_BSP], &bsp)) < 0
+      || (ret = ia64_get (c, c->loc[IA64_REG_BSPSTORE], &bspstore)) < 0)
+    return ret;
+  if (bspstore < bsp)
+    /* Dirty partition got spilled into the ucontext_t structure
+       itself.  We'll need to access it via uc_access(3).  */
+    rbs_switch (c, bsp, bspstore, IA64_LOC_UC_ADDR (bsp | 0x1f8, 0));
+
+  c->ec_loc = prev_cfm_loc;
+
+  *num_regsp = 0;
+  return 0;
+#endif
+}
+
+
+static inline int
+check_rbs_switch (struct cursor *c)
+{
+  unw_word_t saved_bsp, saved_bspstore, loadrs, ndirty;
+  int ret = 0;
+
+  saved_bsp = c->bsp;
+  if (c->pi.flags & UNW_PI_FLAG_IA64_RBS_SWITCH)
+    {
+      /* Got ourselves a frame that has saved ar.bspstore, ar.bsp,
+         and ar.rnat, so we're all set for rbs-switching:  */
+      if ((ret = ia64_get (c, c->loc[IA64_REG_BSP], &saved_bsp)) < 0
+          || (ret = ia64_get (c, c->loc[IA64_REG_BSPSTORE], &saved_bspstore)))
+        return ret;
+    }
+  else if ((c->abi_marker == ABI_MARKER_LINUX_SIGTRAMP
+            || c->abi_marker == ABI_MARKER_OLD_LINUX_SIGTRAMP)
+           && !IA64_IS_REG_LOC (c->loc[IA64_REG_BSP])
+           && (IA64_GET_ADDR (c->loc[IA64_REG_BSP])
+               == c->sigcontext_addr + LINUX_SC_AR_BSP_OFF))
+    {
+      /* When Linux delivers a signal on an alternate stack, it
+         does things a bit differently from what the unwind
+         conventions allow us to describe: instead of saving
+         ar.rnat, ar.bsp, and ar.bspstore, it saves the former two
+         plus the "loadrs" value.  Because of this, we need to
+         detect & record a potential rbs-area switch
+         manually... */
+
+      /* If ar.bsp has been saved already AND the current bsp is
+         not equal to the saved value, then we know for sure that
+         we're past the point where the backing store has been
+         switched (and before the point where it's restored).  */
+      if ((ret = ia64_get (c, IA64_LOC_ADDR (c->sigcontext_addr
+                                             + LINUX_SC_AR_BSP_OFF, 0),
+                           &saved_bsp) < 0)
+          || (ret = ia64_get (c, IA64_LOC_ADDR (c->sigcontext_addr
+                                                + LINUX_SC_LOADRS_OFF, 0),
+                              &loadrs) < 0))
+        return ret;
+      loadrs >>= 16;
+      ndirty = rse_num_regs (c->bsp - loadrs, c->bsp);
+      saved_bspstore = rse_skip_regs (saved_bsp, -ndirty);
+    }
+
+  if (saved_bsp == c->bsp)
+    return 0;
+
+  return rbs_switch (c, saved_bsp, saved_bspstore, c->loc[IA64_REG_RNAT]);
+}
+
+static inline int
+update_frame_state (struct cursor *c)
+{
+  unw_word_t prev_ip, prev_sp, prev_bsp, ip, num_regs;
+  ia64_loc_t prev_cfm_loc;
+  int ret;
+
+  prev_cfm_loc = c->cfm_loc;
+  prev_ip = c->ip;
+  prev_sp = c->sp;
+  prev_bsp = c->bsp;
+
+  /* Update the IP cache (do this first: if we reach the end of the
+     frame-chain, the rest of the info may not be valid/useful
+     anymore. */
+  ret = ia64_get (c, c->loc[IA64_REG_IP], &ip);
+  if (ret < 0)
+    return ret;
+  c->ip = ip;
+
+  if ((ip & 0xc) != 0)
+    {
+      /* don't let obviously bad addresses pollute the cache */
+      Debug (1, "rejecting bad ip=0x%lx\n", (long) c->ip);
+      return -UNW_EINVALIDIP;
+    }
+
+  c->cfm_loc = c->loc[IA64_REG_PFS];
+  /* update the CFM cache: */
+  ret = ia64_get (c, c->cfm_loc, &c->cfm);
+  if (ret < 0)
+    return ret;
+
+  /* Normally, AR.EC is stored in the CFM save-location.  That
+     save-location contains the full function-state as defined by
+     AR.PFS.  However, interruptions only save the frame-marker, not
+     any other info in CFM.  Instead, AR.EC gets saved on the first
+     call by the interruption-handler.  Thus, interruption-related
+     frames need to track the _previous_ CFM save-location since
+     that's were AR.EC is saved.  We support this by setting ec_loc to
+     cfm_loc by default and giving frames marked with an ABI-marker
+     the chance to override this value with prev_cfm_loc.  */
+  c->ec_loc = c->cfm_loc;
+
+  num_regs = 0;
+  if (unlikely (c->abi_marker))
+    {
+      c->last_abi_marker = c->abi_marker;
+      switch (ia64_get_abi_marker (c))
+        {
+        case ABI_MARKER_LINUX_SIGTRAMP:
+        case ABI_MARKER_OLD_LINUX_SIGTRAMP:
+          ia64_set_abi (c, ABI_LINUX);
+          if ((ret = linux_sigtramp (c, prev_cfm_loc, &num_regs)) < 0)
+            return ret;
+          break;
+
+        case ABI_MARKER_OLD_LINUX_INTERRUPT:
+        case ABI_MARKER_LINUX_INTERRUPT:
+          ia64_set_abi (c, ABI_LINUX);
+          if ((ret = linux_interrupt (c, prev_cfm_loc, &num_regs,
+                                      c->abi_marker)) < 0)
+            return ret;
+          break;
+
+        case ABI_MARKER_HP_UX_SIGTRAMP:
+          ia64_set_abi (c, ABI_HPUX);
+          if ((ret = hpux_sigtramp (c, prev_cfm_loc, &num_regs)) < 0)
+            return ret;
+          break;
+
+        default:
+          Debug (1, "unknown ABI marker: ABI=%u, context=%u\n",
+                 c->abi_marker >> 8, c->abi_marker & 0xff);
+          return -UNW_EINVAL;
+        }
+      Debug (12, "sigcontext_addr=%lx (ret=%d)\n",
+             (unsigned long) c->sigcontext_addr, ret);
+
+      c->sigcontext_off = c->sigcontext_addr - c->sp;
+
+      /* update the IP cache: */
+      if ((ret = ia64_get (c, c->loc[IA64_REG_IP], &ip)) < 0)
+        return ret;
+      c->ip = ip;
+      if (ip == 0)
+        /* end of frame-chain reached */
+        return 0;
+    }
+  else
+    num_regs = (c->cfm >> 7) & 0x7f;    /* size of locals */
+
+  if (!IA64_IS_NULL_LOC (c->loc[IA64_REG_BSP]))
+    {
+      ret = check_rbs_switch (c);
+      if (ret < 0)
+        return ret;
+    }
+
+  c->bsp = rse_skip_regs (c->bsp, -num_regs);
+
+  c->sp = c->psp;
+  c->abi_marker = 0;
+
+  if (c->ip == prev_ip && c->sp == prev_sp && c->bsp == prev_bsp)
+    {
+      Dprintf ("%s: ip, sp, and bsp unchanged; stopping here (ip=0x%lx)\n",
+               __FUNCTION__, (long) ip);
+      return -UNW_EBADFRAME;
+    }
+
+  /* as we unwind, the saved ar.unat becomes the primary unat: */
+  c->loc[IA64_REG_PRI_UNAT_MEM] = c->loc[IA64_REG_UNAT];
+
+  /* restore the predicates: */
+  ret = ia64_get (c, c->loc[IA64_REG_PR], &c->pr);
+  if (ret < 0)
+    return ret;
+
+  c->pi_valid = 0;
+  return 0;
+}
+
+
+int
+unw_step (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  int ret;
+
+  Debug (1, "(cursor=%p, ip=0x%016lx)\n", c, (unsigned long) c->ip);
+
+  if ((ret = ia64_find_save_locs (c)) >= 0
+      && (ret = update_frame_state (c)) >= 0)
+    ret = (c->ip == 0) ? 0 : 1;
+
+  Debug (2, "returning %d (ip=0x%016lx)\n", ret, (unsigned long) c->ip);
+  return ret;
+}
diff --git a/src/third_party/unwind/dist/src/ia64/Gtables.c b/src/third_party/unwind/dist/src/ia64/Gtables.c
new file mode 100644
index 00000000000..f5e8f2d8f4d
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Gtables.c
@@ -0,0 +1,731 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2001-2005 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <assert.h>
+#include <stdlib.h>
+#include <stddef.h>
+
+#include "unwind_i.h"
+
+#ifdef HAVE_IA64INTRIN_H
+# include <ia64intrin.h>
+#endif
+
+extern unw_addr_space_t _ULia64_local_addr_space;
+
+struct ia64_table_entry
+  {
+    uint64_t start_offset;
+    uint64_t end_offset;
+    uint64_t info_offset;
+  };
+
+#ifdef UNW_LOCAL_ONLY
+
+static inline int
+is_local_addr_space (unw_addr_space_t as)
+{
+  return 1;
+}
+
+static inline int
+read_mem (unw_addr_space_t as, unw_word_t addr, unw_word_t *valp, void *arg)
+{
+  *valp = *(unw_word_t *) addr;
+  return 0;
+}
+
+#else /* !UNW_LOCAL_ONLY */
+
+static inline int
+is_local_addr_space (unw_addr_space_t as)
+{
+  return as == unw_local_addr_space;
+}
+
+static inline int
+read_mem (unw_addr_space_t as, unw_word_t addr, unw_word_t *valp, void *arg)
+{
+  unw_accessors_t *a = unw_get_accessors_int (as);
+
+  return (*a->access_mem) (as, addr, valp, 0, arg);
+}
+
+/* Helper macro for reading an ia64_table_entry from remote memory.  */
+#define remote_read(addr, member)                                            \
+        (*a->access_mem) (as, (addr) + offsetof (struct ia64_table_entry,    \
+                                                 member), &member, 0, arg)
+
+/* Lookup an unwind-table entry in remote memory.  Returns 1 if an
+   entry is found, 0 if no entry is found, negative if an error
+   occurred reading remote memory.  */
+static int
+remote_lookup (unw_addr_space_t as,
+               unw_word_t table, size_t table_size, unw_word_t rel_ip,
+               struct ia64_table_entry *e, void *arg)
+{
+  unw_word_t e_addr = 0, start_offset, end_offset, info_offset;
+  unw_accessors_t *a = unw_get_accessors_int (as);
+  unsigned long lo, hi, mid;
+  int ret;
+
+  /* do a binary search for right entry: */
+  for (lo = 0, hi = table_size / sizeof (struct ia64_table_entry); lo < hi;)
+    {
+      mid = (lo + hi) / 2;
+      e_addr = table + mid * sizeof (struct ia64_table_entry);
+      if ((ret = remote_read (e_addr, start_offset)) < 0)
+        return ret;
+
+      if (rel_ip < start_offset)
+        hi = mid;
+      else
+        {
+          if ((ret = remote_read (e_addr, end_offset)) < 0)
+            return ret;
+
+          if (rel_ip >= end_offset)
+            lo = mid + 1;
+          else
+            break;
+        }
+    }
+  if (rel_ip < start_offset || rel_ip >= end_offset)
+    return 0;
+  e->start_offset = start_offset;
+  e->end_offset = end_offset;
+
+  if ((ret = remote_read (e_addr, info_offset)) < 0)
+    return ret;
+  e->info_offset = info_offset;
+  return 1;
+}
+
+HIDDEN void
+tdep_put_unwind_info (unw_addr_space_t as, unw_proc_info_t *pi, void *arg)
+{
+  if (!pi->unwind_info)
+    return;
+
+  if (is_local_addr_space (as))
+    {
+      free (pi->unwind_info);
+      pi->unwind_info = NULL;
+    }
+}
+
+unw_word_t
+_Uia64_find_dyn_list (unw_addr_space_t as, unw_dyn_info_t *di, void *arg)
+{
+  unw_word_t hdr_addr, info_addr, hdr, directives, pers, cookie, off;
+  unw_word_t start_offset, end_offset, info_offset, segbase;
+  struct ia64_table_entry *e;
+  size_t table_size;
+  unw_word_t gp = di->gp;
+  int ret;
+
+  switch (di->format)
+    {
+    case UNW_INFO_FORMAT_DYNAMIC:
+    default:
+      return 0;
+
+    case UNW_INFO_FORMAT_TABLE:
+      e = (struct ia64_table_entry *) di->u.ti.table_data;
+      table_size = di->u.ti.table_len * sizeof (di->u.ti.table_data[0]);
+      segbase = di->u.ti.segbase;
+      if (table_size < sizeof (struct ia64_table_entry))
+        return 0;
+      start_offset = e[0].start_offset;
+      end_offset = e[0].end_offset;
+      info_offset = e[0].info_offset;
+      break;
+
+    case UNW_INFO_FORMAT_REMOTE_TABLE:
+      {
+        unw_accessors_t *a = unw_get_accessors_int (as);
+        unw_word_t e_addr = di->u.rti.table_data;
+
+        table_size = di->u.rti.table_len * sizeof (unw_word_t);
+        segbase = di->u.rti.segbase;
+        if (table_size < sizeof (struct ia64_table_entry))
+          return 0;
+
+        if (   (ret = remote_read (e_addr, start_offset) < 0)
+            || (ret = remote_read (e_addr, end_offset) < 0)
+            || (ret = remote_read (e_addr, info_offset) < 0))
+          return ret;
+      }
+      break;
+    }
+
+  if (start_offset != end_offset)
+    /* dyn-list entry cover a zero-length "procedure" and should be
+       first entry (note: technically a binary could contain code
+       below the segment base, but this doesn't happen for normal
+       binaries and certainly doesn't happen when libunwind is a
+       separate shared object.  For weird cases, the application may
+       have to provide its own (slower) version of this routine.  */
+    return 0;
+
+  hdr_addr = info_offset + segbase;
+  info_addr = hdr_addr + 8;
+
+  /* read the header word: */
+  if ((ret = read_mem (as, hdr_addr, &hdr, arg)) < 0)
+    return ret;
+
+  if (IA64_UNW_VER (hdr) != 1
+      || IA64_UNW_FLAG_EHANDLER (hdr) || IA64_UNW_FLAG_UHANDLER (hdr))
+    /* dyn-list entry must be version 1 and doesn't have ehandler
+       or uhandler */
+    return 0;
+
+  if (IA64_UNW_LENGTH (hdr) != 1)
+    /* dyn-list entry must consist of a single word of NOP directives */
+    return 0;
+
+  if (   ((ret = read_mem (as, info_addr, &directives, arg)) < 0)
+      || ((ret = read_mem (as, info_addr + 0x08, &pers, arg)) < 0)
+      || ((ret = read_mem (as, info_addr + 0x10, &cookie, arg)) < 0)
+      || ((ret = read_mem (as, info_addr + 0x18, &off, arg)) < 0))
+    return 0;
+
+  if (directives != 0 || pers != 0
+      || (!as->big_endian && cookie != 0x7473696c2d6e7964ULL)
+      || ( as->big_endian && cookie != 0x64796e2d6c697374ULL))
+    return 0;
+
+  /* OK, we ran the gauntlet and found it: */
+  return off + gp;
+}
+
+#endif /* !UNW_LOCAL_ONLY */
+
+static inline const struct ia64_table_entry *
+lookup (struct ia64_table_entry *table, size_t table_size, unw_word_t rel_ip)
+{
+  const struct ia64_table_entry *e = 0;
+  unsigned long lo, hi, mid;
+
+  /* do a binary search for right entry: */
+  for (lo = 0, hi = table_size / sizeof (struct ia64_table_entry); lo < hi;)
+    {
+      mid = (lo + hi) / 2;
+      e = table + mid;
+      if (rel_ip < e->start_offset)
+        hi = mid;
+      else if (rel_ip >= e->end_offset)
+        lo = mid + 1;
+      else
+        break;
+    }
+  if (rel_ip < e->start_offset || rel_ip >= e->end_offset)
+    return NULL;
+  return e;
+}
+
+int
+unw_search_ia64_unwind_table (unw_addr_space_t as, unw_word_t ip,
+                              unw_dyn_info_t *di, unw_proc_info_t *pi,
+                              int need_unwind_info, void *arg)
+{
+  unw_word_t addr, hdr_addr, info_addr, info_end_addr, hdr, *wp;
+  const struct ia64_table_entry *e = NULL;
+  unw_word_t handler_offset, segbase = 0;
+  int ret, is_local;
+#ifndef UNW_LOCAL_ONLY
+  struct ia64_table_entry ent;
+#endif
+
+  assert ((di->format == UNW_INFO_FORMAT_TABLE
+           || di->format == UNW_INFO_FORMAT_REMOTE_TABLE)
+          && (ip >= di->start_ip && ip < di->end_ip));
+
+  pi->flags = 0;
+  pi->unwind_info = 0;
+  pi->handler = 0;
+
+  if (likely (di->format == UNW_INFO_FORMAT_TABLE))
+    {
+      segbase = di->u.ti.segbase;
+      e = lookup ((struct ia64_table_entry *) di->u.ti.table_data,
+                  di->u.ti.table_len * sizeof (unw_word_t),
+                  ip - segbase);
+    }
+#ifndef UNW_LOCAL_ONLY
+  else
+    {
+      segbase = di->u.rti.segbase;
+      if ((ret = remote_lookup (as, di->u.rti.table_data,
+                                di->u.rti.table_len * sizeof (unw_word_t),
+                                ip - segbase, &ent, arg)) < 0)
+        return ret;
+      if (ret)
+        e = &ent;
+    }
+#endif
+  if (!e)
+    {
+      /* IP is inside this table's range, but there is no explicit
+         unwind info => use default conventions (i.e., this is NOT an
+         error).  */
+      memset (pi, 0, sizeof (*pi));
+      pi->start_ip = 0;
+      pi->end_ip = 0;
+      pi->gp = di->gp;
+      pi->lsda = 0;
+      return 0;
+    }
+
+  pi->start_ip = e->start_offset + segbase;
+  pi->end_ip = e->end_offset + segbase;
+
+  hdr_addr = e->info_offset + segbase;
+  info_addr = hdr_addr + 8;
+
+  /* Read the header word.  Note: the actual unwind-info is always
+     assumed to reside in memory, independent of whether di->format is
+     UNW_INFO_FORMAT_TABLE or UNW_INFO_FORMAT_REMOTE_TABLE.  */
+
+  if ((ret = read_mem (as, hdr_addr, &hdr, arg)) < 0)
+    return ret;
+
+  if (IA64_UNW_VER (hdr) != 1)
+    {
+      Debug (1, "Unknown header version %ld (hdr word=0x%lx @ 0x%lx)\n",
+             IA64_UNW_VER (hdr), (unsigned long) hdr,
+             (unsigned long) hdr_addr);
+      return -UNW_EBADVERSION;
+    }
+
+  info_end_addr = info_addr + 8 * IA64_UNW_LENGTH (hdr);
+
+  is_local = is_local_addr_space (as);
+
+  /* If we must have the unwind-info, return it.  Also, if we are in
+     the local address-space, return the unwind-info because it's so
+     cheap to do so and it may come in handy later on.  */
+  if (need_unwind_info || is_local)
+    {
+      pi->unwind_info_size = 8 * IA64_UNW_LENGTH (hdr);
+
+      if (is_local)
+        pi->unwind_info = (void *) (uintptr_t) info_addr;
+      else
+        {
+          /* Internalize unwind info.  Note: since we're doing this
+             only for non-local address spaces, there is no
+             signal-safety issue and it is OK to use malloc()/free().  */
+          pi->unwind_info = malloc (8 * IA64_UNW_LENGTH (hdr));
+          if (!pi->unwind_info)
+            return -UNW_ENOMEM;
+
+          wp = (unw_word_t *) pi->unwind_info;
+          for (addr = info_addr; addr < info_end_addr; addr += 8, ++wp)
+            {
+              if ((ret = read_mem (as, addr, wp, arg)) < 0)
+                {
+                  free (pi->unwind_info);
+                  return ret;
+                }
+            }
+        }
+    }
+
+  if (IA64_UNW_FLAG_EHANDLER (hdr) || IA64_UNW_FLAG_UHANDLER (hdr))
+    {
+      /* read the personality routine address (address is gp-relative): */
+      if ((ret = read_mem (as, info_end_addr, &handler_offset, arg)) < 0)
+        return ret;
+      Debug (4, "handler ptr @ offset=%lx, gp=%lx\n", handler_offset, di->gp);
+      if ((read_mem (as, handler_offset + di->gp, &pi->handler, arg)) < 0)
+        return ret;
+    }
+  pi->lsda = info_end_addr + 8;
+  pi->gp = di->gp;
+  pi->format = di->format;
+  return 0;
+}
+
+#ifndef UNW_REMOTE_ONLY
+
+# if defined(HAVE_DL_ITERATE_PHDR)
+#  include <link.h>
+#  include <stdlib.h>
+
+#  if __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 2) \
+      || (__GLIBC__ == 2 && __GLIBC_MINOR__ == 2 && !defined(DT_CONFIG))
+#    error You need GLIBC 2.2.4 or later on IA-64 Linux
+#  endif
+
+#  if defined(HAVE_GETUNWIND)
+     extern unsigned long getunwind (void *buf, size_t len);
+#  else /* HAVE_GETUNWIND */
+#   include <unistd.h>
+#   include <sys/syscall.h>
+#   ifndef __NR_getunwind
+#     define __NR_getunwind     1215
+#   endif
+
+static unsigned long
+getunwind (void *buf, size_t len)
+{
+  return syscall (SYS_getunwind, buf, len);
+}
+
+#  endif /* HAVE_GETUNWIND */
+
+static unw_dyn_info_t kernel_table;
+
+static int
+get_kernel_table (unw_dyn_info_t *di)
+{
+  struct ia64_table_entry *ktab, *etab;
+  size_t size;
+
+  Debug (16, "getting kernel table");
+
+  size = getunwind (NULL, 0);
+  ktab = sos_alloc (size);
+  if (!ktab)
+    {
+      Dprintf (__FILE__".%s: failed to allocate %zu bytes",
+               __FUNCTION__, size);
+      return -UNW_ENOMEM;
+    }
+  getunwind (ktab, size);
+
+  /* Determine length of kernel's unwind table & relocate its entries.  */
+  for (etab = ktab; etab->start_offset; ++etab)
+    etab->info_offset += (uint64_t) ktab;
+
+  di->format = UNW_INFO_FORMAT_TABLE;
+  di->gp = 0;
+  di->start_ip = ktab[0].start_offset;
+  di->end_ip = etab[-1].end_offset;
+  di->u.ti.name_ptr = (unw_word_t) "<kernel>";
+  di->u.ti.segbase = 0;
+  di->u.ti.table_len = ((char *) etab - (char *) ktab) / sizeof (unw_word_t);
+  di->u.ti.table_data = (unw_word_t *) ktab;
+
+  Debug (16, "found table `%s': [%lx-%lx) segbase=%lx len=%lu\n",
+         (char *) di->u.ti.name_ptr, di->start_ip, di->end_ip,
+         di->u.ti.segbase, di->u.ti.table_len);
+  return 0;
+}
+
+#  ifndef UNW_LOCAL_ONLY
+
+/* This is exported for the benefit of libunwind-ptrace.a.  */
+int
+_Uia64_get_kernel_table (unw_dyn_info_t *di)
+{
+  int ret;
+
+  if (!kernel_table.u.ti.table_data)
+    if ((ret = get_kernel_table (&kernel_table)) < 0)
+      return ret;
+
+  memcpy (di, &kernel_table, sizeof (*di));
+  return 0;
+}
+
+#  endif /* !UNW_LOCAL_ONLY */
+
+static inline unsigned long
+current_gp (void)
+{
+#  if defined(__GNUC__) && !defined(__INTEL_COMPILER)
+      register unsigned long gp __asm__("gp");
+      return gp;
+#  elif HAVE_IA64INTRIN_H
+      return __getReg (_IA64_REG_GP);
+#  else
+#    error Implement me.
+#  endif
+}
+
+static int
+callback (struct dl_phdr_info *info, size_t size, void *ptr)
+{
+  unw_dyn_info_t *di = ptr;
+  const Elf64_Phdr *phdr, *p_unwind, *p_dynamic, *p_text;
+  long n;
+  Elf64_Addr load_base, segbase = 0;
+
+  /* Make sure struct dl_phdr_info is at least as big as we need.  */
+  if (size < offsetof (struct dl_phdr_info, dlpi_phnum)
+             + sizeof (info->dlpi_phnum))
+    return -1;
+
+  Debug (16, "checking `%s' (load_base=%lx)\n",
+         info->dlpi_name, info->dlpi_addr);
+
+  phdr = info->dlpi_phdr;
+  load_base = info->dlpi_addr;
+  p_text = NULL;
+  p_unwind = NULL;
+  p_dynamic = NULL;
+
+  /* See if PC falls into one of the loaded segments.  Find the unwind
+     segment at the same time.  */
+  for (n = info->dlpi_phnum; --n >= 0; phdr++)
+    {
+      if (phdr->p_type == PT_LOAD)
+        {
+          Elf64_Addr vaddr = phdr->p_vaddr + load_base;
+          if (di->u.ti.segbase >= vaddr
+              && di->u.ti.segbase < vaddr + phdr->p_memsz)
+            p_text = phdr;
+        }
+      else if (phdr->p_type == PT_IA_64_UNWIND)
+        p_unwind = phdr;
+      else if (phdr->p_type == PT_DYNAMIC)
+        p_dynamic = phdr;
+    }
+  if (!p_text || !p_unwind)
+    return 0;
+
+  if (likely (p_unwind->p_vaddr >= p_text->p_vaddr
+              && p_unwind->p_vaddr < p_text->p_vaddr + p_text->p_memsz))
+    /* normal case: unwind table is inside text segment */
+    segbase = p_text->p_vaddr + load_base;
+  else
+    {
+      /* Special case: unwind table is in some other segment; this
+         happens for the Linux kernel's gate DSO, for example.  */
+      phdr = info->dlpi_phdr;
+      for (n = info->dlpi_phnum; --n >= 0; phdr++)
+        {
+          if (phdr->p_type == PT_LOAD && p_unwind->p_vaddr >= phdr->p_vaddr
+              && p_unwind->p_vaddr < phdr->p_vaddr + phdr->p_memsz)
+            {
+              segbase = phdr->p_vaddr + load_base;
+              break;
+            }
+        }
+    }
+
+  if (p_dynamic)
+    {
+      /* For dynamicly linked executables and shared libraries,
+         DT_PLTGOT is the gp value for that object.  */
+      Elf64_Dyn *dyn = (Elf64_Dyn *)(p_dynamic->p_vaddr + load_base);
+      for (; dyn->d_tag != DT_NULL; ++dyn)
+        if (dyn->d_tag == DT_PLTGOT)
+          {
+            /* On IA-64, _DYNAMIC is writable and GLIBC has relocated it.  */
+            di->gp = dyn->d_un.d_ptr;
+            break;
+          }
+    }
+  else
+    /* Otherwise this is a static executable with no _DYNAMIC.
+       The gp is constant program-wide.  */
+    di->gp = current_gp();
+  di->format = UNW_INFO_FORMAT_TABLE;
+  di->start_ip = p_text->p_vaddr + load_base;
+  di->end_ip = p_text->p_vaddr + load_base + p_text->p_memsz;
+  di->u.ti.name_ptr = (unw_word_t) info->dlpi_name;
+  di->u.ti.table_data = (void *) (p_unwind->p_vaddr + load_base);
+  di->u.ti.table_len = p_unwind->p_memsz / sizeof (unw_word_t);
+  di->u.ti.segbase = segbase;
+
+  Debug (16, "found table `%s': segbase=%lx, len=%lu, gp=%lx, "
+         "table_data=%p\n", (char *) di->u.ti.name_ptr, di->u.ti.segbase,
+         di->u.ti.table_len, di->gp, di->u.ti.table_data);
+  return 1;
+}
+
+#  ifdef HAVE_DL_PHDR_REMOVALS_COUNTER
+
+static inline int
+validate_cache (unw_addr_space_t as)
+{
+  /* Note: we don't need to serialize here with respect to
+     dl_iterate_phdr() because if somebody were to remove an object
+     that is required to complete the unwind on whose behalf we're
+     validating the cache here, we'd be hosed anyhow.  What we're
+     guarding against here is the case where library FOO gets mapped,
+     unwind info for FOO gets cached, FOO gets unmapped, BAR gets
+     mapped in the place where FOO was and then we unwind across a
+     function in FOO.  Since no thread can execute in BAR before FOO
+     has been removed, we are guaranteed that
+     dl_phdr_removals_counter() would have been incremented before we
+     get here.  */
+  unsigned long long removals = dl_phdr_removals_counter ();
+
+  if (removals == as->shared_object_removals)
+    return 1;
+
+  as->shared_object_removals = removals;
+  unw_flush_cache (as, 0, 0);
+  return -1;
+}
+
+#  else /* !HAVE_DL_PHDR_REMOVALS_COUNTER */
+
+/* Check whether any phdrs have been removed since we last flushed the
+   cache.  If so we flush the cache and return -1, if not, we do
+   nothing and return 1.  */
+
+static int
+check_callback (struct dl_phdr_info *info, size_t size, void *ptr)
+{
+#   ifdef HAVE_STRUCT_DL_PHDR_INFO_DLPI_SUBS
+  unw_addr_space_t as = ptr;
+
+  if (size <
+      offsetof (struct dl_phdr_info, dlpi_subs) + sizeof (info->dlpi_subs))
+    /* It would be safer to flush the cache here, but that would
+       disable caching for older libc's which would be incompatible
+       with the behavior of older versions of libunwind so we return 1
+       instead and hope nobody runs into stale cache info...  */
+    return 1;
+
+  if (info->dlpi_subs == as->shared_object_removals)
+    return 1;
+
+  as->shared_object_removals = info->dlpi_subs;
+  unw_flush_cache (as, 0, 0);
+  return -1;            /* indicate that there were removals */
+#   else
+  return 1;
+#   endif
+}
+
+static inline int
+validate_cache (unw_addr_space_t as)
+{
+  intrmask_t saved_mask;
+  int ret;
+
+  SIGPROCMASK (SIG_SETMASK, &unwi_full_mask, &saved_mask);
+  ret = dl_iterate_phdr (check_callback, as);
+  SIGPROCMASK (SIG_SETMASK, &saved_mask, NULL);
+  return ret;
+}
+
+#  endif /* HAVE_DL_PHDR_REMOVALS_COUNTER */
+
+# elif defined(HAVE_DLMODINFO)
+  /* Support for HP-UX-style dlmodinfo() */
+#  include <dlfcn.h>
+
+static inline int
+validate_cache (unw_addr_space_t as)
+{
+  return 1;
+}
+
+# endif /* !HAVE_DLMODINFO */
+
+HIDDEN int
+tdep_find_proc_info (unw_addr_space_t as, unw_word_t ip,
+                     unw_proc_info_t *pi, int need_unwind_info, void *arg)
+{
+# if defined(HAVE_DL_ITERATE_PHDR)
+  unw_dyn_info_t di, *dip = &di;
+  intrmask_t saved_mask;
+  int ret;
+
+  di.u.ti.segbase = ip; /* this is cheap... */
+
+  SIGPROCMASK (SIG_SETMASK, &unwi_full_mask, &saved_mask);
+  ret = dl_iterate_phdr (callback, &di);
+  SIGPROCMASK (SIG_SETMASK, &saved_mask, NULL);
+
+  if (ret <= 0)
+    {
+      if (!kernel_table.u.ti.table_data)
+        {
+          if ((ret = get_kernel_table (&kernel_table)) < 0)
+            return ret;
+        }
+      if (ip < kernel_table.start_ip || ip >= kernel_table.end_ip)
+        return -UNW_ENOINFO;
+      dip = &kernel_table;
+    }
+# elif defined(HAVE_DLMODINFO)
+# define UNWIND_TBL_32BIT       0x8000000000000000
+  struct load_module_desc lmd;
+  unw_dyn_info_t di, *dip = &di;
+  struct unwind_header
+    {
+      uint64_t header_version;
+      uint64_t start_offset;
+      uint64_t end_offset;
+    }
+  *uhdr;
+
+  if (!dlmodinfo (ip, &lmd, sizeof (lmd), NULL, 0, 0))
+    return -UNW_ENOINFO;
+
+  di.format = UNW_INFO_FORMAT_TABLE;
+  di.start_ip = lmd.text_base;
+  di.end_ip = lmd.text_base + lmd.text_size;
+  di.gp = lmd.linkage_ptr;
+  di.u.ti.name_ptr = 0; /* no obvious table-name available */
+  di.u.ti.segbase = lmd.text_base;
+
+  uhdr = (struct unwind_header *) lmd.unwind_base;
+
+  if ((uhdr->header_version & ~UNWIND_TBL_32BIT) != 1
+      && (uhdr->header_version & ~UNWIND_TBL_32BIT) != 2)
+    {
+      Debug (1, "encountered unknown unwind header version %ld\n",
+             (long) (uhdr->header_version & ~UNWIND_TBL_32BIT));
+      return -UNW_EBADVERSION;
+    }
+  if (uhdr->header_version & UNWIND_TBL_32BIT)
+    {
+      Debug (1, "32-bit unwind tables are not supported yet\n");
+      return -UNW_EINVAL;
+    }
+
+  di.u.ti.table_data = (unw_word_t *) (di.u.ti.segbase + uhdr->start_offset);
+  di.u.ti.table_len = ((uhdr->end_offset - uhdr->start_offset)
+                       / sizeof (unw_word_t));
+
+  Debug (16, "found table `%s': segbase=%lx, len=%lu, gp=%lx, "
+         "table_data=%p\n", (char *) di.u.ti.name_ptr, di.u.ti.segbase,
+         di.u.ti.table_len, di.gp, di.u.ti.table_data);
+# endif
+
+  /* now search the table: */
+  return tdep_search_unwind_table (as, ip, dip, pi, need_unwind_info, arg);
+}
+
+/* Returns 1 if the cache is up-to-date or -1 if the cache contained
+   stale data and had to be flushed.  */
+
+HIDDEN int
+ia64_local_validate_cache (unw_addr_space_t as, void *arg)
+{
+  return validate_cache (as);
+}
+
+#endif /* !UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/dist/src/ia64/Lapply_reg_state.c b/src/third_party/unwind/dist/src/ia64/Lapply_reg_state.c
new file mode 100644
index 00000000000..7ebada480e5
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Lapply_reg_state.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gapply_reg_state.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ia64/Lcreate_addr_space.c b/src/third_party/unwind/dist/src/ia64/Lcreate_addr_space.c
new file mode 100644
index 00000000000..0f2dc6be901
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Lcreate_addr_space.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gcreate_addr_space.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ia64/Lfind_unwind_table.c b/src/third_party/unwind/dist/src/ia64/Lfind_unwind_table.c
new file mode 100644
index 00000000000..68e269f1d7f
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Lfind_unwind_table.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gfind_unwind_table.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ia64/Lget_proc_info.c b/src/third_party/unwind/dist/src/ia64/Lget_proc_info.c
new file mode 100644
index 00000000000..69028b019fc
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Lget_proc_info.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gget_proc_info.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ia64/Lget_save_loc.c b/src/third_party/unwind/dist/src/ia64/Lget_save_loc.c
new file mode 100644
index 00000000000..9ea048a9076
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Lget_save_loc.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gget_save_loc.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ia64/Lglobal.c b/src/third_party/unwind/dist/src/ia64/Lglobal.c
new file mode 100644
index 00000000000..6d7b489e14b
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Lglobal.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gglobal.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ia64/Linit.c b/src/third_party/unwind/dist/src/ia64/Linit.c
new file mode 100644
index 00000000000..e9abfdd46a3
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Linit.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ia64/Linit_local.c b/src/third_party/unwind/dist/src/ia64/Linit_local.c
new file mode 100644
index 00000000000..68a1687e854
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Linit_local.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit_local.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ia64/Linit_remote.c b/src/third_party/unwind/dist/src/ia64/Linit_remote.c
new file mode 100644
index 00000000000..58cb04ab7cd
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Linit_remote.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit_remote.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ia64/Linstall_cursor.S b/src/third_party/unwind/dist/src/ia64/Linstall_cursor.S
new file mode 100644
index 00000000000..8c723397252
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Linstall_cursor.S
@@ -0,0 +1,6 @@
+#define UNW_LOCAL_ONLY
+#include "Ginstall_cursor.S"
+#ifdef __linux__
+	/* We do not need executable stack.  */
+	.section	.note.GNU-stack,"",@progbits
+#endif
diff --git a/src/third_party/unwind/dist/src/ia64/Lis_signal_frame.c b/src/third_party/unwind/dist/src/ia64/Lis_signal_frame.c
new file mode 100644
index 00000000000..b9a7c4f51ad
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Lis_signal_frame.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gis_signal_frame.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ia64/Lparser.c b/src/third_party/unwind/dist/src/ia64/Lparser.c
new file mode 100644
index 00000000000..f23aaf48e9c
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Lparser.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gparser.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ia64/Lrbs.c b/src/third_party/unwind/dist/src/ia64/Lrbs.c
new file mode 100644
index 00000000000..a91b5f2979a
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Lrbs.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Grbs.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ia64/Lreg_states_iterate.c b/src/third_party/unwind/dist/src/ia64/Lreg_states_iterate.c
new file mode 100644
index 00000000000..f1eb1e79dcd
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Lreg_states_iterate.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Greg_states_iterate.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ia64/Lregs.c b/src/third_party/unwind/dist/src/ia64/Lregs.c
new file mode 100644
index 00000000000..2c9c75cd7d9
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Lregs.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gregs.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ia64/Lresume.c b/src/third_party/unwind/dist/src/ia64/Lresume.c
new file mode 100644
index 00000000000..41a8cf003de
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Lresume.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gresume.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ia64/Lscript.c b/src/third_party/unwind/dist/src/ia64/Lscript.c
new file mode 100644
index 00000000000..57b926bf801
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Lscript.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gscript.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ia64/Lstep.c b/src/third_party/unwind/dist/src/ia64/Lstep.c
new file mode 100644
index 00000000000..c1ac3c7547f
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Lstep.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gstep.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ia64/Ltables.c b/src/third_party/unwind/dist/src/ia64/Ltables.c
new file mode 100644
index 00000000000..876b0aac03d
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/Ltables.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gtables.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ia64/dyn_info_list.S b/src/third_party/unwind/dist/src/ia64/dyn_info_list.S
new file mode 100644
index 00000000000..31265f66a06
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/dyn_info_list.S
@@ -0,0 +1,26 @@
+#ifndef UNW_REMOTE_ONLY
+
+/*
+ * Create a special unwind-table entry which makes it easy for an
+ * unwinder to locate the dynamic registration list.  The special
+ * entry covers address range [0-0) and is therefore guaranteed to be
+ * the first in the unwind-table.
+ */
+	.global _U_dyn_info_list
+	.hidden _U_dyn_info_list
+
+	.section .IA_64.unwind_info,"a","progbits"
+.info:	data8 (1<<48) | 1	/* v1, length==1 (8-byte word) */
+	data8 0		/* 8 empty .prologue directives (nops) */
+	data8 0		/* personality routine (ignored) */
+	string "dyn-list"	/* lsda */
+	data8 @gprel(_U_dyn_info_list)
+
+	.section .IA_64.unwind, "a", "progbits"
+	data8 0, 0, @segrel(.info)
+
+#endif
+#ifdef __linux__
+	/* We do not need executable stack.  */
+	.section	.note.GNU-stack,"",@progbits
+#endif
diff --git a/src/third_party/unwind/dist/src/ia64/getcontext.S b/src/third_party/unwind/dist/src/ia64/getcontext.S
new file mode 100644
index 00000000000..d8da732acc8
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/getcontext.S
@@ -0,0 +1,177 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "ucontext_i.h"
+
+#define GR(n)   (SC_GR + (n)*8)
+#define BR(n)   (SC_BR + (n)*8)
+#define FR(n)   (SC_FR + (n)*16)
+
+/* This should be compatible to the libc's getcontext(), except that
+   the sc->sc_mask field is always cleared and that the name is
+   prefixed with _Uia64_ so we don't step on the application's
+   name-space.  */
+
+	.align 32
+	.protected _Uia64_getcontext
+	.global _Uia64_getcontext
+	.proc _Uia64_getcontext
+_Uia64_getcontext:
+	.prologue
+	alloc rPFS = ar.pfs, 1, 0, 0, 0				// M2
+	mov rPR = pr						// I0, 2 cycles
+	add r2 = GR(1), in0					// I1
+	;;
+
+	.save ar.unat, rUNAT
+	mov.m rUNAT = ar.unat					// M2, 5 cycles
+	.body
+	st8.spill [r2] = r1, (SC_FLAGS - GR(1))			// M3
+	dep.z rFLAGS = -1, IA64_SC_FLAG_SYNCHRONOUS_BIT, 1	// I0, 1 cycle
+	;;
+
+	mov.m rRSC = ar.rsc					// M2, 12 cyc.
+	st8 [r2] = rFLAGS, (SC_PR  - SC_FLAGS)			// M3
+	add r3 = FR(2), in0
+	;;
+
+	mov.m rBSP = ar.bsp					// M2, 12 cyc.
+	st8 [r2] = rPR, (GR(12) - SC_PR)			// M3
+	add r8 = FR(16), in0
+	;;
+
+	mov.m rFPSR = ar.fpsr					// M2, 12 cyc.
+	st8.spill [r2] = r12, (GR(4) - GR(12))			// M3
+	add r9 = FR(24), in0
+	;;
+
+	stf.spill [r3] = f2					// M2
+	stf.spill [r8] = f16					// M3
+	add r3 = GR(7), in0
+	;;
+
+	flushrs							// M0
+	stf.spill [r9] = f24, (FR(31) - FR(24))			// M2
+	mov rB0 = b0						// I0, 2 cycles
+	;;
+
+	stf.spill [r9] = f31					// M2
+	st8.spill [r2] = r4, (GR(5) - GR(4))			// M3, bank 1
+	mov rB1 = b1						// I0, 2 cycles
+	;;
+
+.mem.offset 0,0; st8.spill [r2] = r5, (GR(6) - GR(5))		// M4, bank 0
+.mem.offset 8,0; st8.spill [r3] = r7, (BR(0) - GR(7))		// M3, bank 0
+	mov rB2 = b2						// I0, 2 cycles
+	;;
+
+	st8.spill [r2] = r6, (BR(1) - GR(6))			// M2, bank 1
+	st8 [r3] = rB0, (BR(4) - BR(0))				// M3, bank 1
+	mov rB4 = b4						// I0, 2 cycles
+	;;
+
+	mov.m rNAT = ar.unat					// M2, 5 cycles
+	st8 [r2] = rB1, (BR(2) - BR(1))				// M3, bank 0
+	mov rB3 = b3
+	;;
+
+	st8 [r2] = rB2, (BR(3) - BR(2))				// M2, bank 1
+	st8 [r3] = rB4, (SC_LC - BR(4))				// M3, bank 1
+	mov rB5 = b5						// I0, 2 cycles
+	;;
+
+	and rTMP = ~0x3, rRSC					// M0
+	add rPOS = GR(0), in0	// rPOS <- &sc_gr[0]		// M1
+	mov.i rLC = ar.lc					// I0, 2 cycles
+	;;
+
+	mov.m ar.rsc = rTMP	// put RSE into lazy mode	// M2, ? cycles
+	st8 [r2] = rB3, (BR(5) - BR(3))				// M3, bank 0
+	extr.u rPOS = rPOS, 3, 6 // get NaT bitnr for r0	// I0
+	;;
+
+	mov.m rRNAT = ar.rnat					// M2, 5 cycles
+	st8 [r2] = rB5, (SC_PFS - BR(5))			// M3, bank 0
+	sub rCPOS = 64, rPOS					// I0
+	;;
+
+	st8 [r2] = rPFS, (SC_UNAT - SC_PFS)			// M2
+	st8 [r3] = rLC, (SC_BSP - SC_LC)			// M3
+	shr.u rTMP = rNAT, rPOS					// I0, 3 cycles
+	;;
+
+	st8 [r2] = rUNAT, (SC_FPSR - SC_UNAT)			// M2
+	st8 [r3] = rBSP						// M3
+	add r8 = FR(3), in0
+	;;
+
+	st8 [r2] = rFPSR, (SC_RNAT - SC_FPSR)			// M2
+	stf.spill [r8] = f3, (FR(4) - FR(3))			// M3
+	add r9 = FR(5), in0
+	;;
+
+	stf.spill [r8] = f4, (FR(17) - FR(4))			// M2
+	stf.spill [r9] = f5, (FR(19) - FR(5))			// M3
+	shl rNAT = rNAT, rCPOS					// I0, 3 cycles
+	;;
+
+	st8 [r2] = rRNAT, (SC_NAT - SC_RNAT)			// M2
+	stf.spill [r8] = f17, (FR(18) - FR(17))			// M3
+	nop.i 0
+	;;
+
+	stf.spill [r8] = f18, (FR(20) - FR(18))			// M2
+	stf.spill [r9] = f19, (FR(21) - FR(19))			// M3
+	nop.i 0
+	;;
+
+	stf.spill [r8] = f20, (FR(22) - FR(20))			// M2
+	stf.spill [r9] = f21, (FR(23) - FR(21))			// M3
+	or rNAT = rNAT, rTMP					// I0
+	;;
+
+	st8 [r2] = rNAT						// M2
+	stf.spill [r8] = f22, (FR(25) - FR(22))			// M3
+	;;
+	stf.spill [r9] = f23, (FR(26) - FR(23))			// M2
+	stf.spill [r8] = f25, (FR(27) - FR(25))			// M3
+	;;
+	stf.spill [r9] = f26, (FR(28) - FR(26))			// M2
+	stf.spill [r8] = f27, (FR(29) - FR(27))			// M3
+	;;
+	mov.m ar.rsc = rRSC	// restore RSE mode		// M2
+	stf.spill [r9] = f28, (FR(30) - FR(28))			// M3
+	;;
+	mov.m ar.unat = rUNAT	// restore caller's UNaT	// M2
+	stf.spill [r8] = f29					// M3
+	;;
+	stf.spill [r9] = f30					// M2
+	mov r8 = 0
+	br.ret.sptk.many rp
+	.endp _Uia64_getcontext
+#ifdef __linux__
+	/* We do not need executable stack.  */
+	.section	.note.GNU-stack,"",@progbits
+#endif
diff --git a/src/third_party/unwind/dist/src/ia64/init.h b/src/third_party/unwind/dist/src/ia64/init.h
new file mode 100644
index 00000000000..6628a1d8882
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/init.h
@@ -0,0 +1,132 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002-2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+static ALWAYS_INLINE int
+common_init (struct cursor *c, unw_word_t sp, unw_word_t bsp)
+{
+  unw_word_t bspstore, rbs_base;
+  int ret;
+
+  if (c->as->caching_policy != UNW_CACHE_NONE)
+    /* ensure cache doesn't have any stale contents: */
+    ia64_validate_cache (c->as, c->as_arg);
+
+  c->cfm_loc =                  IA64_REG_LOC (c, UNW_IA64_CFM);
+  c->loc[IA64_REG_BSP] =        IA64_NULL_LOC;
+  c->loc[IA64_REG_BSPSTORE] =   IA64_REG_LOC (c, UNW_IA64_AR_BSPSTORE);
+  c->loc[IA64_REG_PFS] =        IA64_REG_LOC (c, UNW_IA64_AR_PFS);
+  c->loc[IA64_REG_RNAT] =       IA64_REG_LOC (c, UNW_IA64_AR_RNAT);
+  c->loc[IA64_REG_IP] =         IA64_REG_LOC (c, UNW_IA64_IP);
+  c->loc[IA64_REG_PRI_UNAT_MEM] = IA64_NULL_LOC; /* no primary UNaT location */
+  c->loc[IA64_REG_UNAT] =       IA64_REG_LOC (c, UNW_IA64_AR_UNAT);
+  c->loc[IA64_REG_PR] =         IA64_REG_LOC (c, UNW_IA64_PR);
+  c->loc[IA64_REG_LC] =         IA64_REG_LOC (c, UNW_IA64_AR_LC);
+  c->loc[IA64_REG_FPSR] =       IA64_REG_LOC (c, UNW_IA64_AR_FPSR);
+
+  c->loc[IA64_REG_R4] = IA64_REG_LOC (c, UNW_IA64_GR + 4);
+  c->loc[IA64_REG_R5] = IA64_REG_LOC (c, UNW_IA64_GR + 5);
+  c->loc[IA64_REG_R6] = IA64_REG_LOC (c, UNW_IA64_GR + 6);
+  c->loc[IA64_REG_R7] = IA64_REG_LOC (c, UNW_IA64_GR + 7);
+
+  c->loc[IA64_REG_NAT4] = IA64_REG_NAT_LOC (c, UNW_IA64_NAT + 4, &c->nat_bitnr[0]);
+  c->loc[IA64_REG_NAT5] = IA64_REG_NAT_LOC (c, UNW_IA64_NAT + 5, &c->nat_bitnr[1]);
+  c->loc[IA64_REG_NAT6] = IA64_REG_NAT_LOC (c, UNW_IA64_NAT + 6, &c->nat_bitnr[2]);
+  c->loc[IA64_REG_NAT7] = IA64_REG_NAT_LOC (c, UNW_IA64_NAT + 7, &c->nat_bitnr[3]);
+
+  c->loc[IA64_REG_B1] = IA64_REG_LOC (c, UNW_IA64_BR + 1);
+  c->loc[IA64_REG_B2] = IA64_REG_LOC (c, UNW_IA64_BR + 2);
+  c->loc[IA64_REG_B3] = IA64_REG_LOC (c, UNW_IA64_BR + 3);
+  c->loc[IA64_REG_B4] = IA64_REG_LOC (c, UNW_IA64_BR + 4);
+  c->loc[IA64_REG_B5] = IA64_REG_LOC (c, UNW_IA64_BR + 5);
+
+  c->loc[IA64_REG_F2] = IA64_FPREG_LOC (c, UNW_IA64_FR + 2);
+  c->loc[IA64_REG_F3] = IA64_FPREG_LOC (c, UNW_IA64_FR + 3);
+  c->loc[IA64_REG_F4] = IA64_FPREG_LOC (c, UNW_IA64_FR + 4);
+  c->loc[IA64_REG_F5] = IA64_FPREG_LOC (c, UNW_IA64_FR + 5);
+  c->loc[IA64_REG_F16] = IA64_FPREG_LOC (c, UNW_IA64_FR + 16);
+  c->loc[IA64_REG_F17] = IA64_FPREG_LOC (c, UNW_IA64_FR + 17);
+  c->loc[IA64_REG_F18] = IA64_FPREG_LOC (c, UNW_IA64_FR + 18);
+  c->loc[IA64_REG_F19] = IA64_FPREG_LOC (c, UNW_IA64_FR + 19);
+  c->loc[IA64_REG_F20] = IA64_FPREG_LOC (c, UNW_IA64_FR + 20);
+  c->loc[IA64_REG_F21] = IA64_FPREG_LOC (c, UNW_IA64_FR + 21);
+  c->loc[IA64_REG_F22] = IA64_FPREG_LOC (c, UNW_IA64_FR + 22);
+  c->loc[IA64_REG_F23] = IA64_FPREG_LOC (c, UNW_IA64_FR + 23);
+  c->loc[IA64_REG_F24] = IA64_FPREG_LOC (c, UNW_IA64_FR + 24);
+  c->loc[IA64_REG_F25] = IA64_FPREG_LOC (c, UNW_IA64_FR + 25);
+  c->loc[IA64_REG_F26] = IA64_FPREG_LOC (c, UNW_IA64_FR + 26);
+  c->loc[IA64_REG_F27] = IA64_FPREG_LOC (c, UNW_IA64_FR + 27);
+  c->loc[IA64_REG_F28] = IA64_FPREG_LOC (c, UNW_IA64_FR + 28);
+  c->loc[IA64_REG_F29] = IA64_FPREG_LOC (c, UNW_IA64_FR + 29);
+  c->loc[IA64_REG_F30] = IA64_FPREG_LOC (c, UNW_IA64_FR + 30);
+  c->loc[IA64_REG_F31] = IA64_FPREG_LOC (c, UNW_IA64_FR + 31);
+
+  ret = ia64_get (c, c->loc[IA64_REG_IP], &c->ip);
+  if (ret < 0)
+    return ret;
+
+  ret = ia64_get (c, c->cfm_loc, &c->cfm);
+  if (ret < 0)
+    return ret;
+
+  ret = ia64_get (c, c->loc[IA64_REG_PR], &c->pr);
+  if (ret < 0)
+    return ret;
+
+  c->sp = c->psp = sp;
+  c->bsp = bsp;
+
+  ret = ia64_get (c, c->loc[IA64_REG_BSPSTORE], &bspstore);
+  if (ret < 0)
+    return ret;
+
+  c->rbs_curr = c->rbs_left_edge = 0;
+
+  /* Try to find a base of the register backing-store.  We may default
+     to a reasonable value (e.g., half the address-space down from
+     bspstore).  If the BSPSTORE looks corrupt, we fail. */
+  if ((ret = rbs_get_base (c, bspstore, &rbs_base)) < 0)
+    return ret;
+
+  c->rbs_area[0].end = bspstore;
+  c->rbs_area[0].size = bspstore - rbs_base;
+  c->rbs_area[0].rnat_loc = IA64_REG_LOC (c, UNW_IA64_AR_RNAT);
+  Debug (10, "initial rbs-area: [0x%llx-0x%llx), rnat@%s\n",
+         (long long) rbs_base, (long long) c->rbs_area[0].end,
+         ia64_strloc (c->rbs_area[0].rnat_loc));
+
+  c->pi.flags = 0;
+
+  c->sigcontext_addr = 0;
+  c->abi_marker = 0;
+  c->last_abi_marker = 0;
+
+  c->hint = 0;
+  c->prev_script = 0;
+  c->eh_valid_mask = 0;
+  c->pi_valid = 0;
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/ia64/longjmp.S b/src/third_party/unwind/dist/src/ia64/longjmp.S
new file mode 100644
index 00000000000..2a2f286594b
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/longjmp.S
@@ -0,0 +1,42 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+	.global _UI_longjmp_cont
+
+	.align 32
+	.proc longjmp_continuation
+longjmp_continuation:
+_UI_longjmp_cont:		// non-function label for {sig,}longjmp.c
+	.prologue
+	.save rp, r15
+	.body
+	mov rp = r15
+	mov r8 = r16
+	br.sptk.many rp
+	.endp longjmp_continuation
+#ifdef __linux__
+	/* We do not need executable stack.  */
+	.section	.note.GNU-stack,"",@progbits
+#endif
diff --git a/src/third_party/unwind/dist/src/ia64/offsets.h b/src/third_party/unwind/dist/src/ia64/offsets.h
new file mode 100644
index 00000000000..5ab7f8b31e6
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/offsets.h
@@ -0,0 +1,137 @@
+/* Linux-specific definitions: */
+
+/* Define various structure offsets to simplify cross-compilation.  */
+
+/* The first three 64-bit words in a signal frame contain the signal
+   number, siginfo pointer, and sigcontext pointer passed to the
+   signal handler.  We use this to locate the sigcontext pointer.  */
+
+#define LINUX_SIGFRAME_ARG2_OFF 0x10
+
+#define LINUX_SC_FLAGS_OFF      0x000
+#define LINUX_SC_NAT_OFF        0x008
+#define LINUX_SC_STACK_OFF      0x010
+#define LINUX_SC_IP_OFF         0x028
+#define LINUX_SC_CFM_OFF        0x030
+#define LINUX_SC_UM_OFF         0x038
+#define LINUX_SC_AR_RSC_OFF     0x040
+#define LINUX_SC_AR_BSP_OFF     0x048
+#define LINUX_SC_AR_RNAT_OFF    0x050
+#define LINUX_SC_AR_CCV         0x058
+#define LINUX_SC_AR_UNAT_OFF    0x060
+#define LINUX_SC_AR_FPSR_OFF    0x068
+#define LINUX_SC_AR_PFS_OFF     0x070
+#define LINUX_SC_AR_LC_OFF      0x078
+#define LINUX_SC_PR_OFF         0x080
+#define LINUX_SC_BR_OFF         0x088
+#define LINUX_SC_GR_OFF         0x0c8
+#define LINUX_SC_FR_OFF         0x1d0
+#define LINUX_SC_RBS_BASE_OFF   0x9d0
+#define LINUX_SC_LOADRS_OFF     0x9d8
+#define LINUX_SC_AR_CSD_OFF     0x9e0
+#define LINUX_SC_AR_SSD_OFF     0x9e8
+#define LINUX_SC_MASK           0xa50
+
+/* Layout of old Linux kernel interrupt frame (struct pt_regs).  */
+
+#define LINUX_OLD_PT_IPSR_OFF   0x000
+#define LINUX_OLD_PT_IIP_OFF    0x008
+#define LINUX_OLD_PT_IFS_OFF    0x010
+#define LINUX_OLD_PT_UNAT_OFF   0x018
+#define LINUX_OLD_PT_PFS_OFF    0x020
+#define LINUX_OLD_PT_RSC_OFF    0x028
+#define LINUX_OLD_PT_RNAT_OFF   0x030
+#define LINUX_OLD_PT_BSPSTORE_OFF 0x038
+#define LINUX_OLD_PT_PR_OFF     0x040
+#define LINUX_OLD_PT_B6_OFF     0x048
+#define LINUX_OLD_PT_LOADRS_OFF 0x050
+#define LINUX_OLD_PT_R1_OFF     0x058
+#define LINUX_OLD_PT_R2_OFF     0x060
+#define LINUX_OLD_PT_R3_OFF     0x068
+#define LINUX_OLD_PT_R12_OFF    0x070
+#define LINUX_OLD_PT_R13_OFF    0x078
+#define LINUX_OLD_PT_R14_OFF    0x080
+#define LINUX_OLD_PT_R15_OFF    0x088
+#define LINUX_OLD_PT_R8_OFF     0x090
+#define LINUX_OLD_PT_R9_OFF     0x098
+#define LINUX_OLD_PT_R10_OFF    0x0a0
+#define LINUX_OLD_PT_R11_OFF    0x0a8
+#define LINUX_OLD_PT_R16_OFF    0x0b0
+#define LINUX_OLD_PT_R17_OFF    0x0b8
+#define LINUX_OLD_PT_R18_OFF    0x0c0
+#define LINUX_OLD_PT_R19_OFF    0x0c8
+#define LINUX_OLD_PT_R20_OFF    0x0d0
+#define LINUX_OLD_PT_R21_OFF    0x0d8
+#define LINUX_OLD_PT_R22_OFF    0x0e0
+#define LINUX_OLD_PT_R23_OFF    0x0e8
+#define LINUX_OLD_PT_R24_OFF    0x0f0
+#define LINUX_OLD_PT_R25_OFF    0x0f8
+#define LINUX_OLD_PT_R26_OFF    0x100
+#define LINUX_OLD_PT_R27_OFF    0x108
+#define LINUX_OLD_PT_R28_OFF    0x110
+#define LINUX_OLD_PT_R29_OFF    0x118
+#define LINUX_OLD_PT_R30_OFF    0x120
+#define LINUX_OLD_PT_R31_OFF    0x128
+#define LINUX_OLD_PT_CCV_OFF    0x130
+#define LINUX_OLD_PT_FPSR_OFF   0x138
+#define LINUX_OLD_PT_B0_OFF     0x140
+#define LINUX_OLD_PT_B7_OFF     0x148
+#define LINUX_OLD_PT_F6_OFF     0x150
+#define LINUX_OLD_PT_F7_OFF     0x160
+#define LINUX_OLD_PT_F8_OFF     0x170
+#define LINUX_OLD_PT_F9_OFF     0x180
+
+/* Layout of new Linux kernel interrupt frame (struct pt_regs).  */
+
+#define LINUX_PT_B6_OFF         0
+#define LINUX_PT_B7_OFF         8
+#define LINUX_PT_CSD_OFF        16
+#define LINUX_PT_SSD_OFF        24
+#define LINUX_PT_R8_OFF         32
+#define LINUX_PT_R9_OFF         40
+#define LINUX_PT_R10_OFF        48
+#define LINUX_PT_R11_OFF        56
+#define LINUX_PT_IPSR_OFF       64
+#define LINUX_PT_IIP_OFF        72
+#define LINUX_PT_IFS_OFF        80
+#define LINUX_PT_UNAT_OFF       88
+#define LINUX_PT_PFS_OFF        96
+#define LINUX_PT_RSC_OFF        104
+#define LINUX_PT_RNAT_OFF       112
+#define LINUX_PT_BSPSTORE_OFF   120
+#define LINUX_PT_PR_OFF         128
+#define LINUX_PT_B0_OFF         136
+#define LINUX_PT_LOADRS_OFF     144
+#define LINUX_PT_R1_OFF         152
+#define LINUX_PT_R12_OFF        160
+#define LINUX_PT_R13_OFF        168
+#define LINUX_PT_FPSR_OFF       176
+#define LINUX_PT_R15_OFF        184
+#define LINUX_PT_R14_OFF        192
+#define LINUX_PT_R2_OFF         200
+#define LINUX_PT_R3_OFF         208
+#define LINUX_PT_R16_OFF        216
+#define LINUX_PT_R17_OFF        224
+#define LINUX_PT_R18_OFF        232
+#define LINUX_PT_R19_OFF        240
+#define LINUX_PT_R20_OFF        248
+#define LINUX_PT_R21_OFF        256
+#define LINUX_PT_R22_OFF        264
+#define LINUX_PT_R23_OFF        272
+#define LINUX_PT_R24_OFF        280
+#define LINUX_PT_R25_OFF        288
+#define LINUX_PT_R26_OFF        296
+#define LINUX_PT_R27_OFF        304
+#define LINUX_PT_R28_OFF        312
+#define LINUX_PT_R29_OFF        320
+#define LINUX_PT_R30_OFF        328
+#define LINUX_PT_R31_OFF        336
+#define LINUX_PT_CCV_OFF        344
+#define LINUX_PT_F6_OFF         352
+#define LINUX_PT_F7_OFF         368
+#define LINUX_PT_F8_OFF         384
+#define LINUX_PT_F9_OFF         400
+#define LINUX_PT_F10_OFF        416
+#define LINUX_PT_F11_OFF        432
+
+#define LINUX_PT_P_NONSYS       5       /* must match pNonSys in entry.h */
diff --git a/src/third_party/unwind/dist/src/ia64/regname.c b/src/third_party/unwind/dist/src/ia64/regname.c
new file mode 100644
index 00000000000..3636df87de5
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/regname.c
@@ -0,0 +1,189 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002-2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* Logically, we like to think of the stack as a contiguous region of
+memory.  Unfortunately, this logical view doesn't work for the
+register backing store, because the RSE is an asynchronous engine and
+because UNIX/Linux allow for stack-switching via sigaltstack(2).
+Specifically, this means that any given stacked register may or may
+not be backed up by memory in the current stack.  If not, then the
+backing memory may be found in any of the "more inner" (younger)
+stacks.  The routines in this file help manage the discontiguous
+nature of the register backing store.  The routines are completely
+independent of UNIX/Linux, but each stack frame that switches the
+backing store is expected to reserve 4 words for use by libunwind. For
+example, in the Linux sigcontext, sc_fr[0] and sc_fr[1] serve this
+purpose.  */
+
+#include "libunwind_i.h"
+
+/* Maintain the register names as a single string to keep the number
+   of dynamic relocations in the shared object to a minimum.  */
+
+#define regname_len     9
+#define regname_str                                                     \
+  "r0\0\0\0\0\0\0\0r1\0\0\0\0\0\0\0r2\0\0\0\0\0\0\0r3\0\0\0\0\0\0\0"    \
+  "r4\0\0\0\0\0\0\0r5\0\0\0\0\0\0\0r6\0\0\0\0\0\0\0r7\0\0\0\0\0\0\0"    \
+  "r8\0\0\0\0\0\0\0r9\0\0\0\0\0\0\0r10\0\0\0\0\0\0r11\0\0\0\0\0\0"      \
+  "r12\0\0\0\0\0\0r13\0\0\0\0\0\0r14\0\0\0\0\0\0r15\0\0\0\0\0\0"        \
+  "r16\0\0\0\0\0\0r17\0\0\0\0\0\0r18\0\0\0\0\0\0r19\0\0\0\0\0\0"        \
+  "r20\0\0\0\0\0\0r21\0\0\0\0\0\0r22\0\0\0\0\0\0r23\0\0\0\0\0\0"        \
+  "r24\0\0\0\0\0\0r25\0\0\0\0\0\0r26\0\0\0\0\0\0r27\0\0\0\0\0\0"        \
+  "r28\0\0\0\0\0\0r29\0\0\0\0\0\0r30\0\0\0\0\0\0r31\0\0\0\0\0\0"        \
+  "r32\0\0\0\0\0\0r33\0\0\0\0\0\0r34\0\0\0\0\0\0r35\0\0\0\0\0\0"        \
+  "r36\0\0\0\0\0\0r37\0\0\0\0\0\0r38\0\0\0\0\0\0r39\0\0\0\0\0\0"        \
+  "r40\0\0\0\0\0\0r41\0\0\0\0\0\0r42\0\0\0\0\0\0r43\0\0\0\0\0\0"        \
+  "r44\0\0\0\0\0\0r45\0\0\0\0\0\0r46\0\0\0\0\0\0r47\0\0\0\0\0\0"        \
+  "r48\0\0\0\0\0\0r49\0\0\0\0\0\0r50\0\0\0\0\0\0r51\0\0\0\0\0\0"        \
+  "r52\0\0\0\0\0\0r53\0\0\0\0\0\0r54\0\0\0\0\0\0r55\0\0\0\0\0\0"        \
+  "r56\0\0\0\0\0\0r57\0\0\0\0\0\0r58\0\0\0\0\0\0r59\0\0\0\0\0\0"        \
+  "r60\0\0\0\0\0\0r61\0\0\0\0\0\0r62\0\0\0\0\0\0r63\0\0\0\0\0\0"        \
+  "r64\0\0\0\0\0\0r65\0\0\0\0\0\0r66\0\0\0\0\0\0r67\0\0\0\0\0\0"        \
+  "r68\0\0\0\0\0\0r69\0\0\0\0\0\0r70\0\0\0\0\0\0r71\0\0\0\0\0\0"        \
+  "r72\0\0\0\0\0\0r73\0\0\0\0\0\0r74\0\0\0\0\0\0r75\0\0\0\0\0\0"        \
+  "r76\0\0\0\0\0\0r77\0\0\0\0\0\0r78\0\0\0\0\0\0r79\0\0\0\0\0\0"        \
+  "r80\0\0\0\0\0\0r81\0\0\0\0\0\0r82\0\0\0\0\0\0r83\0\0\0\0\0\0"        \
+  "r84\0\0\0\0\0\0r85\0\0\0\0\0\0r86\0\0\0\0\0\0r87\0\0\0\0\0\0"        \
+  "r88\0\0\0\0\0\0r89\0\0\0\0\0\0r90\0\0\0\0\0\0r91\0\0\0\0\0\0"        \
+  "r92\0\0\0\0\0\0r93\0\0\0\0\0\0r94\0\0\0\0\0\0r95\0\0\0\0\0\0"        \
+  "r96\0\0\0\0\0\0r97\0\0\0\0\0\0r98\0\0\0\0\0\0r99\0\0\0\0\0\0"        \
+  "r100\0\0\0\0\0r101\0\0\0\0\0r102\0\0\0\0\0r103\0\0\0\0\0"            \
+  "r104\0\0\0\0\0r105\0\0\0\0\0r106\0\0\0\0\0r107\0\0\0\0\0"            \
+  "r108\0\0\0\0\0r109\0\0\0\0\0r110\0\0\0\0\0r111\0\0\0\0\0"            \
+  "r112\0\0\0\0\0r113\0\0\0\0\0r114\0\0\0\0\0r115\0\0\0\0\0"            \
+  "r116\0\0\0\0\0r117\0\0\0\0\0r118\0\0\0\0\0r119\0\0\0\0\0"            \
+  "r120\0\0\0\0\0r121\0\0\0\0\0r122\0\0\0\0\0r123\0\0\0\0\0"            \
+  "r124\0\0\0\0\0r125\0\0\0\0\0r126\0\0\0\0\0r127\0\0\0\0\0"            \
+  "nat0\0\0\0\0\0nat1\0\0\0\0\0nat2\0\0\0\0\0nat3\0\0\0\0\0"            \
+  "nat4\0\0\0\0\0nat5\0\0\0\0\0nat6\0\0\0\0\0nat7\0\0\0\0\0"            \
+  "nat8\0\0\0\0\0nat9\0\0\0\0\0nat10\0\0\0\0nat11\0\0\0\0"              \
+  "nat12\0\0\0\0nat13\0\0\0\0nat14\0\0\0\0nat15\0\0\0\0"                \
+  "nat16\0\0\0\0nat17\0\0\0\0nat18\0\0\0\0nat19\0\0\0\0"                \
+  "nat20\0\0\0\0nat21\0\0\0\0nat22\0\0\0\0nat23\0\0\0\0"                \
+  "nat24\0\0\0\0nat25\0\0\0\0nat26\0\0\0\0nat27\0\0\0\0"                \
+  "nat28\0\0\0\0nat29\0\0\0\0nat30\0\0\0\0nat31\0\0\0\0"                \
+  "nat32\0\0\0\0nat33\0\0\0\0nat34\0\0\0\0nat35\0\0\0\0"                \
+  "nat36\0\0\0\0nat37\0\0\0\0nat38\0\0\0\0nat39\0\0\0\0"                \
+  "nat40\0\0\0\0nat41\0\0\0\0nat42\0\0\0\0nat43\0\0\0\0"                \
+  "nat44\0\0\0\0nat45\0\0\0\0nat46\0\0\0\0nat47\0\0\0\0"                \
+  "nat48\0\0\0\0nat49\0\0\0\0nat50\0\0\0\0nat51\0\0\0\0"                \
+  "nat52\0\0\0\0nat53\0\0\0\0nat54\0\0\0\0nat55\0\0\0\0"                \
+  "nat56\0\0\0\0nat57\0\0\0\0nat58\0\0\0\0nat59\0\0\0\0"                \
+  "nat60\0\0\0\0nat61\0\0\0\0nat62\0\0\0\0nat63\0\0\0\0"                \
+  "nat64\0\0\0\0nat65\0\0\0\0nat66\0\0\0\0nat67\0\0\0\0"                \
+  "nat68\0\0\0\0nat69\0\0\0\0nat70\0\0\0\0nat71\0\0\0\0"                \
+  "nat72\0\0\0\0nat73\0\0\0\0nat74\0\0\0\0nat75\0\0\0\0"                \
+  "nat76\0\0\0\0nat77\0\0\0\0nat78\0\0\0\0nat79\0\0\0\0"                \
+  "nat80\0\0\0\0nat81\0\0\0\0nat82\0\0\0\0nat83\0\0\0\0"                \
+  "nat84\0\0\0\0nat85\0\0\0\0nat86\0\0\0\0nat87\0\0\0\0"                \
+  "nat88\0\0\0\0nat89\0\0\0\0nat90\0\0\0\0nat91\0\0\0\0"                \
+  "nat92\0\0\0\0nat93\0\0\0\0nat94\0\0\0\0nat95\0\0\0\0"                \
+  "nat96\0\0\0\0nat97\0\0\0\0nat98\0\0\0\0nat99\0\0\0\0"                \
+  "nat100\0\0\0nat101\0\0\0nat102\0\0\0nat103\0\0\0"                    \
+  "nat104\0\0\0nat105\0\0\0nat106\0\0\0nat107\0\0\0"                    \
+  "nat108\0\0\0nat109\0\0\0nat110\0\0\0nat111\0\0\0"                    \
+  "nat112\0\0\0nat113\0\0\0nat114\0\0\0nat115\0\0\0"                    \
+  "nat116\0\0\0nat117\0\0\0nat118\0\0\0nat119\0\0\0"                    \
+  "nat120\0\0\0nat121\0\0\0nat122\0\0\0nat123\0\0\0"                    \
+  "nat124\0\0\0nat125\0\0\0nat126\0\0\0nat127\0\0\0"                    \
+  "f0\0\0\0\0\0\0\0f1\0\0\0\0\0\0\0f2\0\0\0\0\0\0\0f3\0\0\0\0\0\0\0"    \
+  "f4\0\0\0\0\0\0\0f5\0\0\0\0\0\0\0f6\0\0\0\0\0\0\0f7\0\0\0\0\0\0\0"    \
+  "f8\0\0\0\0\0\0\0f9\0\0\0\0\0\0\0f10\0\0\0\0\0\0f11\0\0\0\0\0\0"      \
+  "f12\0\0\0\0\0\0f13\0\0\0\0\0\0f14\0\0\0\0\0\0f15\0\0\0\0\0\0"        \
+  "f16\0\0\0\0\0\0f17\0\0\0\0\0\0f18\0\0\0\0\0\0f19\0\0\0\0\0\0"        \
+  "f20\0\0\0\0\0\0f21\0\0\0\0\0\0f22\0\0\0\0\0\0f23\0\0\0\0\0\0"        \
+  "f24\0\0\0\0\0\0f25\0\0\0\0\0\0f26\0\0\0\0\0\0f27\0\0\0\0\0\0"        \
+  "f28\0\0\0\0\0\0f29\0\0\0\0\0\0f30\0\0\0\0\0\0f31\0\0\0\0\0\0"        \
+  "f32\0\0\0\0\0\0f33\0\0\0\0\0\0f34\0\0\0\0\0\0f35\0\0\0\0\0\0"        \
+  "f36\0\0\0\0\0\0f37\0\0\0\0\0\0f38\0\0\0\0\0\0f39\0\0\0\0\0\0"        \
+  "f40\0\0\0\0\0\0f41\0\0\0\0\0\0f42\0\0\0\0\0\0f43\0\0\0\0\0\0"        \
+  "f44\0\0\0\0\0\0f45\0\0\0\0\0\0f46\0\0\0\0\0\0f47\0\0\0\0\0\0"        \
+  "f48\0\0\0\0\0\0f49\0\0\0\0\0\0f50\0\0\0\0\0\0f51\0\0\0\0\0\0"        \
+  "f52\0\0\0\0\0\0f53\0\0\0\0\0\0f54\0\0\0\0\0\0f55\0\0\0\0\0\0"        \
+  "f56\0\0\0\0\0\0f57\0\0\0\0\0\0f58\0\0\0\0\0\0f59\0\0\0\0\0\0"        \
+  "f60\0\0\0\0\0\0f61\0\0\0\0\0\0f62\0\0\0\0\0\0f63\0\0\0\0\0\0"        \
+  "f64\0\0\0\0\0\0f65\0\0\0\0\0\0f66\0\0\0\0\0\0f67\0\0\0\0\0\0"        \
+  "f68\0\0\0\0\0\0f69\0\0\0\0\0\0f70\0\0\0\0\0\0f71\0\0\0\0\0\0"        \
+  "f72\0\0\0\0\0\0f73\0\0\0\0\0\0f74\0\0\0\0\0\0f75\0\0\0\0\0\0"        \
+  "f76\0\0\0\0\0\0f77\0\0\0\0\0\0f78\0\0\0\0\0\0f79\0\0\0\0\0\0"        \
+  "f80\0\0\0\0\0\0f81\0\0\0\0\0\0f82\0\0\0\0\0\0f83\0\0\0\0\0\0"        \
+  "f84\0\0\0\0\0\0f85\0\0\0\0\0\0f86\0\0\0\0\0\0f87\0\0\0\0\0\0"        \
+  "f88\0\0\0\0\0\0f89\0\0\0\0\0\0f90\0\0\0\0\0\0f91\0\0\0\0\0\0"        \
+  "f92\0\0\0\0\0\0f93\0\0\0\0\0\0f94\0\0\0\0\0\0f95\0\0\0\0\0\0"        \
+  "f96\0\0\0\0\0\0f97\0\0\0\0\0\0f98\0\0\0\0\0\0f99\0\0\0\0\0\0"        \
+  "f100\0\0\0\0\0f101\0\0\0\0\0f102\0\0\0\0\0f103\0\0\0\0\0"            \
+  "f104\0\0\0\0\0f105\0\0\0\0\0f106\0\0\0\0\0f107\0\0\0\0\0"            \
+  "f108\0\0\0\0\0f109\0\0\0\0\0f110\0\0\0\0\0f111\0\0\0\0\0"            \
+  "f112\0\0\0\0\0f113\0\0\0\0\0f114\0\0\0\0\0f115\0\0\0\0\0"            \
+  "f116\0\0\0\0\0f117\0\0\0\0\0f118\0\0\0\0\0f119\0\0\0\0\0"            \
+  "f120\0\0\0\0\0f121\0\0\0\0\0f122\0\0\0\0\0f123\0\0\0\0\0"            \
+  "f124\0\0\0\0\0f125\0\0\0\0\0f126\0\0\0\0\0f127\0\0\0\0\0"            \
+  "ar0\0\0\0\0\0\0ar1\0\0\0\0\0\0ar2\0\0\0\0\0\0ar3\0\0\0\0\0\0"        \
+  "ar4\0\0\0\0\0\0ar5\0\0\0\0\0\0ar6\0\0\0\0\0\0ar7\0\0\0\0\0\0"        \
+  "ar8\0\0\0\0\0\0ar9\0\0\0\0\0\0ar10\0\0\0\0\0ar11\0\0\0\0\0"          \
+  "ar12\0\0\0\0\0ar13\0\0\0\0\0ar14\0\0\0\0\0ar15\0\0\0\0\0"            \
+  "rsc\0\0\0\0\0\0bsp\0\0\0\0\0\0bspstore\0rnat\0\0\0\0\0"              \
+  "ar20\0\0\0\0\0ar21\0\0\0\0\0ar22\0\0\0\0\0ar23\0\0\0\0\0"            \
+  "ar24\0\0\0\0\0ar25\0\0\0\0\0ar26\0\0\0\0\0ar27\0\0\0\0\0"            \
+  "ar28\0\0\0\0\0ar29\0\0\0\0\0ar30\0\0\0\0\0ar31\0\0\0\0\0"            \
+  "ccv\0\0\0\0\0\0ar33\0\0\0\0\0ar34\0\0\0\0\0ar35\0\0\0\0\0"           \
+  "unat\0\0\0\0\0ar37\0\0\0\0\0ar38\0\0\0\0\0ar39\0\0\0\0\0"            \
+  "fpsr\0\0\0\0\0ar41\0\0\0\0\0ar42\0\0\0\0\0ar43\0\0\0\0\0"            \
+  "ar44\0\0\0\0\0ar45\0\0\0\0\0ar46\0\0\0\0\0ar47\0\0\0\0\0"            \
+  "ar48\0\0\0\0\0ar49\0\0\0\0\0ar50\0\0\0\0\0ar51\0\0\0\0\0"            \
+  "ar52\0\0\0\0\0ar53\0\0\0\0\0ar54\0\0\0\0\0ar55\0\0\0\0\0"            \
+  "ar56\0\0\0\0\0ar57\0\0\0\0\0ar58\0\0\0\0\0ar59\0\0\0\0\0"            \
+  "ar60\0\0\0\0\0ar61\0\0\0\0\0ar62\0\0\0\0\0ar63\0\0\0\0\0"            \
+  "pfs\0\0\0\0\0\0lc\0\0\0\0\0\0\0ec\0\0\0\0\0\0\0ar67\0\0\0\0\0"       \
+  "ar68\0\0\0\0\0ar69\0\0\0\0\0ar70\0\0\0\0\0ar71\0\0\0\0\0"            \
+  "ar72\0\0\0\0\0ar73\0\0\0\0\0ar74\0\0\0\0\0ar75\0\0\0\0\0"            \
+  "ar76\0\0\0\0\0ar77\0\0\0\0\0ar78\0\0\0\0\0ar79\0\0\0\0\0"            \
+  "ar80\0\0\0\0\0ar81\0\0\0\0\0ar82\0\0\0\0\0ar83\0\0\0\0\0"            \
+  "ar84\0\0\0\0\0ar85\0\0\0\0\0ar86\0\0\0\0\0ar87\0\0\0\0\0"            \
+  "ar88\0\0\0\0\0ar89\0\0\0\0\0ar90\0\0\0\0\0ar91\0\0\0\0\0"            \
+  "ar92\0\0\0\0\0ar93\0\0\0\0\0ar94\0\0\0\0\0ar95\0\0\0\0\0"            \
+  "ar96\0\0\0\0\0ar97\0\0\0\0\0ar98\0\0\0\0\0ar99\0\0\0\0\0"            \
+  "ar100\0\0\0\0ar101\0\0\0\0ar102\0\0\0\0ar103\0\0\0\0"                \
+  "ar104\0\0\0\0ar105\0\0\0\0ar106\0\0\0\0ar107\0\0\0\0"                \
+  "ar108\0\0\0\0ar109\0\0\0\0ar110\0\0\0\0ar111\0\0\0\0"                \
+  "ar112\0\0\0\0ar113\0\0\0\0ar114\0\0\0\0ar115\0\0\0\0"                \
+  "ar116\0\0\0\0ar117\0\0\0\0ar118\0\0\0\0ar119\0\0\0\0"                \
+  "ar120\0\0\0\0ar121\0\0\0\0ar122\0\0\0\0ar123\0\0\0\0"                \
+  "ar124\0\0\0\0ar125\0\0\0\0ar126\0\0\0\0ar127\0\0\0\0"                \
+  "rp\0\0\0\0\0\0\0b1\0\0\0\0\0\0\0b2\0\0\0\0\0\0\0b3\0\0\0\0\0\0\0"    \
+  "b4\0\0\0\0\0\0\0b5\0\0\0\0\0\0\0b6\0\0\0\0\0\0\0b7\0\0\0\0\0\0\0"    \
+  "pr\0\0\0\0\0\0\0cfm\0\0\0\0\0\0bsp\0\0\0\0\0\0ip\0\0\0\0\0\0\0"      \
+  "sp\0\0\0\0\0\0\0"
+
+#define NREGS   ((int) (sizeof (regname_str) - 1) / regname_len)
+
+const char *
+unw_regname (unw_regnum_t reg)
+{
+  if (reg < NREGS)
+    return regname_str + reg * regname_len;
+  else
+    return "???";
+}
diff --git a/src/third_party/unwind/dist/src/ia64/regs.h b/src/third_party/unwind/dist/src/ia64/regs.h
new file mode 100644
index 00000000000..a22a818776f
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/regs.h
@@ -0,0 +1,73 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002-2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+/* Apply rotation to a general register.  REG must be in the range 0-127.  */
+
+static inline int
+rotate_gr (struct cursor *c, int reg)
+{
+  unsigned int rrb_gr, sor;
+  int preg;
+
+  sor = 8 * ((c->cfm >> 14) & 0xf);
+  rrb_gr = (c->cfm >> 18) & 0x7f;
+
+  if ((unsigned) (reg - 32) >= sor)
+    preg = reg;
+  else
+    {
+      preg = reg + rrb_gr;      /* apply rotation */
+      if ((unsigned) (preg - 32) >= sor)
+        preg -= sor;            /* wrap around */
+    }
+  if (sor)
+    Debug (15, "sor=%u rrb.gr=%u, r%d -> r%d\n", sor, rrb_gr, reg, preg);
+  return preg;
+}
+
+/* Apply rotation to a floating-point register.  The number REG must
+   be in the range of 0-127.  */
+
+static inline int
+rotate_fr (struct cursor *c, int reg)
+{
+  unsigned int rrb_fr;
+  int preg;
+
+  rrb_fr = (c->cfm >> 25) & 0x7f;
+  if (reg < 32)
+    preg = reg;         /* register not part of the rotating partition */
+  else
+    {
+      preg = reg + rrb_fr;      /* apply rotation */
+      if (preg > 127)
+        preg -= 96;             /* wrap around */
+    }
+  if (rrb_fr)
+    Debug (15, "rrb.fr=%u, f%d -> f%d\n", rrb_fr, reg, preg);
+  return preg;
+}
diff --git a/src/third_party/unwind/dist/src/ia64/setjmp.S b/src/third_party/unwind/dist/src/ia64/setjmp.S
new file mode 100644
index 00000000000..384615b840e
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/setjmp.S
@@ -0,0 +1,51 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "jmpbuf.h"
+
+	.align 32
+
+	.global _setjmp
+
+	.proc _setjmp
+
+_setjmp:
+	mov r2 = ar.bsp
+	st8 [r32] = r12			// jmp_buf[JB_SP] = sp
+	mov r3 = rp
+
+	adds r16 = JB_RP*8, r32
+	adds r17 = JB_BSP*8, r32
+	mov r8 = 0
+	;;
+	st8 [r16] = r3		// jmp_buf[JB_RP] = rp
+	st8 [r17] = r2		// jmp_buf[JB_BSP] = bsp
+	br.ret.sptk.many rp
+
+	.endp _setjmp
+#ifdef __linux__
+	/* We do not need executable stack.  */
+	.section	.note.GNU-stack,"",@progbits
+#endif
diff --git a/src/third_party/unwind/dist/src/ia64/siglongjmp.S b/src/third_party/unwind/dist/src/ia64/siglongjmp.S
new file mode 100644
index 00000000000..d77b43753bb
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/siglongjmp.S
@@ -0,0 +1,69 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#define SIG_SETMASK	2
+
+	.global _UI_siglongjmp_cont
+	.global sigprocmask
+
+	.align 32
+	.proc siglongjmp_continuation
+siglongjmp_continuation:
+_UI_siglongjmp_cont:		// non-function label for siglongjmp.c
+	.prologue
+	.save rp, r15
+	.body
+	nop 0
+	nop 0
+	br.call.sptk.many b6 = .next
+	;;
+	.prologue
+	.save ar.pfs, r33
+.next:	alloc loc1 = ar.pfs, 0, 3, 3, 0
+	/*
+	 * Note: we can use the scratch stack are because the caller
+	 * of sigsetjmp() by definition is not a leaf-procedure.
+	 */
+	st8 [sp] = r17			// store signal mask
+	.save rp, loc0
+	mov loc0 = r15			// final continuation point
+	;;
+	.body
+	mov loc2 = r16			// value to return in r8
+
+	mov out0 = SIG_SETMASK
+	mov out1 = sp
+	mov out2 = r0
+	br.call.sptk.many rp = sigprocmask
+	;;
+	mov rp = loc0
+	mov ar.pfs = loc1
+	mov r8 = loc2
+	br.ret.sptk.many rp
+	.endp siglongjmp_continuation
+#ifdef __linux__
+	/* We do not need executable stack.  */
+	.section	.note.GNU-stack,"",@progbits
+#endif
diff --git a/src/third_party/unwind/dist/src/ia64/sigsetjmp.S b/src/third_party/unwind/dist/src/ia64/sigsetjmp.S
new file mode 100644
index 00000000000..02f7af4b377
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/sigsetjmp.S
@@ -0,0 +1,69 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "jmpbuf.h"
+
+#define SIG_BLOCK 0
+
+	.align 32
+
+	.global __sigsetjmp
+	.global sigprocmask
+
+	.proc __sigsetjmp
+
+__sigsetjmp:
+	.prologue
+	.save ar.pfs, r35
+	alloc loc1 = ar.pfs, 2, 3, 3, 0
+	add out2 = JB_MASK*8, in0
+	.save rp, loc0
+	mov loc0 = rp
+	mov out0 = SIG_BLOCK
+	.body
+	;;
+	cmp.ne p6, p0 = in1, r0
+	mov out1 = r0
+	mov loc2 = ar.bsp
+(p6)	br.call.sptk.many rp = sigprocmask // sigjmp_buf[JB_MASK] = sigmask
+	;;
+
+	add r16 = JB_MASK_SAVED*8, in0
+	st8 [in0] = sp, (JB_RP-JB_SP)*8	// sigjmp_buf[JB_SP] = sp
+	mov r8 = 0
+	;;
+	st8 [in0] = loc0, (JB_BSP-JB_RP)*8	// sigjmp_buf[JB_RP] = rp
+	st8 [r16] = in1			// sigjmp_buf[JB_MASK_SAVED] = savemask
+	mov rp = loc0
+	;;
+	st8 [in0] = loc2		// sigjmp_buf[JB_BSP] = bsp
+	mov.i ar.pfs = loc1
+	br.ret.sptk.many rp
+
+	.endp __sigsetjmp
+#ifdef __linux__
+	/* We do not need executable stack.  */
+	.section	.note.GNU-stack,"",@progbits
+#endif
diff --git a/src/third_party/unwind/dist/src/ia64/ucontext_i.h b/src/third_party/unwind/dist/src/ia64/ucontext_i.h
new file mode 100644
index 00000000000..ea32c8aaa09
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/ucontext_i.h
@@ -0,0 +1,68 @@
+/* Copyright (C) 2002 Hewlett-Packard Co.
+     Contributed by David Mosberger-Tang <davidm@hpl.hp.com>.
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* Constants shared between setcontext() and getcontext().  Don't
+   install this header file.  */
+
+#define SIG_BLOCK       0
+#define SIG_UNBLOCK     1
+#define SIG_SETMASK     2
+
+#define IA64_SC_FLAG_SYNCHRONOUS_BIT    63
+
+#define SC_FLAGS 0x000
+#define SC_NAT  0x008
+#define SC_BSP  0x048
+#define SC_RNAT 0x050
+#define SC_UNAT 0x060
+#define SC_FPSR 0x068
+#define SC_PFS  0x070
+#define SC_LC   0x078
+#define SC_PR   0x080
+#define SC_BR   0x088
+#define SC_GR   0x0c8
+#define SC_FR   0x1d0
+#define SC_MASK 0x9d0
+
+
+#define rTMP    r10
+#define rPOS    r11
+#define rCPOS   r14
+#define rNAT    r15
+#define rFLAGS  r16
+
+#define rB5     r18
+#define rB4     r19
+#define rB3     r20
+#define rB2     r21
+#define rB1     r22
+#define rB0     r23
+#define rRSC    r24
+#define rBSP    r25
+#define rRNAT   r26
+#define rUNAT   r27
+#define rFPSR   r28
+#define rPFS    r29
+#define rLC     r30
+#define rPR     r31
diff --git a/src/third_party/unwind/dist/src/ia64/unwind_decoder.h b/src/third_party/unwind/dist/src/ia64/unwind_decoder.h
new file mode 100644
index 00000000000..7fd41740de8
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/unwind_decoder.h
@@ -0,0 +1,477 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2002 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/*
+ * Generic IA-64 unwind info decoder.
+ *
+ * This file is used both by the Linux kernel and objdump.  Please keep
+ * the two copies of this file in sync.
+ *
+ * You need to customize the decoder by defining the following
+ * macros/constants before including this file:
+ *
+ *  Types:
+ *      unw_word        Unsigned integer type with at least 64 bits
+ *
+ *  Register names:
+ *      UNW_REG_BSP
+ *      UNW_REG_BSPSTORE
+ *      UNW_REG_FPSR
+ *      UNW_REG_LC
+ *      UNW_REG_PFS
+ *      UNW_REG_PR
+ *      UNW_REG_RNAT
+ *      UNW_REG_PSP
+ *      UNW_REG_RP
+ *      UNW_REG_UNAT
+ *
+ *  Decoder action macros:
+ *      UNW_DEC_BAD_CODE(code)
+ *      UNW_DEC_ABI(fmt,abi,context,arg)
+ *      UNW_DEC_BR_GR(fmt,brmask,gr,arg)
+ *      UNW_DEC_BR_MEM(fmt,brmask,arg)
+ *      UNW_DEC_COPY_STATE(fmt,label,arg)
+ *      UNW_DEC_EPILOGUE(fmt,t,ecount,arg)
+ *      UNW_DEC_FRGR_MEM(fmt,grmask,frmask,arg)
+ *      UNW_DEC_FR_MEM(fmt,frmask,arg)
+ *      UNW_DEC_GR_GR(fmt,grmask,gr,arg)
+ *      UNW_DEC_GR_MEM(fmt,grmask,arg)
+ *      UNW_DEC_LABEL_STATE(fmt,label,arg)
+ *      UNW_DEC_MEM_STACK_F(fmt,t,size,arg)
+ *      UNW_DEC_MEM_STACK_V(fmt,t,arg)
+ *      UNW_DEC_PRIUNAT_GR(fmt,r,arg)
+ *      UNW_DEC_PRIUNAT_WHEN_GR(fmt,t,arg)
+ *      UNW_DEC_PRIUNAT_WHEN_MEM(fmt,t,arg)
+ *      UNW_DEC_PRIUNAT_WHEN_PSPREL(fmt,pspoff,arg)
+ *      UNW_DEC_PRIUNAT_WHEN_SPREL(fmt,spoff,arg)
+ *      UNW_DEC_PROLOGUE(fmt,body,rlen,arg)
+ *      UNW_DEC_PROLOGUE_GR(fmt,rlen,mask,grsave,arg)
+ *      UNW_DEC_REG_PSPREL(fmt,reg,pspoff,arg)
+ *      UNW_DEC_REG_REG(fmt,src,dst,arg)
+ *      UNW_DEC_REG_SPREL(fmt,reg,spoff,arg)
+ *      UNW_DEC_REG_WHEN(fmt,reg,t,arg)
+ *      UNW_DEC_RESTORE(fmt,t,abreg,arg)
+ *      UNW_DEC_RESTORE_P(fmt,qp,t,abreg,arg)
+ *      UNW_DEC_SPILL_BASE(fmt,pspoff,arg)
+ *      UNW_DEC_SPILL_MASK(fmt,imaskp,arg)
+ *      UNW_DEC_SPILL_PSPREL(fmt,t,abreg,pspoff,arg)
+ *      UNW_DEC_SPILL_PSPREL_P(fmt,qp,t,abreg,pspoff,arg)
+ *      UNW_DEC_SPILL_REG(fmt,t,abreg,x,ytreg,arg)
+ *      UNW_DEC_SPILL_REG_P(fmt,qp,t,abreg,x,ytreg,arg)
+ *      UNW_DEC_SPILL_SPREL(fmt,t,abreg,spoff,arg)
+ *      UNW_DEC_SPILL_SPREL_P(fmt,qp,t,abreg,pspoff,arg)
+ */
+
+static unw_word
+unw_decode_uleb128 (unsigned char **dpp)
+{
+  unsigned shift = 0;
+  unw_word byte, result = 0;
+  unsigned char *bp = *dpp;
+
+  while (1)
+    {
+      byte = *bp++;
+      result |= (byte & 0x7f) << shift;
+      if ((byte & 0x80) == 0)
+        break;
+      shift += 7;
+    }
+  *dpp = bp;
+  return result;
+}
+
+static unsigned char *
+unw_decode_x1 (unsigned char *dp, unsigned char code, void *arg)
+{
+  unsigned char byte1, abreg;
+  unw_word t, off;
+
+  byte1 = *dp++;
+  t = unw_decode_uleb128 (&dp);
+  off = unw_decode_uleb128 (&dp);
+  abreg = (byte1 & 0x7f);
+  if (byte1 & 0x80)
+          UNW_DEC_SPILL_SPREL(X1, t, abreg, off, arg);
+  else
+          UNW_DEC_SPILL_PSPREL(X1, t, abreg, off, arg);
+  return dp;
+}
+
+static unsigned char *
+unw_decode_x2 (unsigned char *dp, unsigned char code, void *arg)
+{
+  unsigned char byte1, byte2, abreg, x, ytreg;
+  unw_word t;
+
+  byte1 = *dp++; byte2 = *dp++;
+  t = unw_decode_uleb128 (&dp);
+  abreg = (byte1 & 0x7f);
+  ytreg = byte2;
+  x = (byte1 >> 7) & 1;
+  if ((byte1 & 0x80) == 0 && ytreg == 0)
+    UNW_DEC_RESTORE(X2, t, abreg, arg);
+  else
+    UNW_DEC_SPILL_REG(X2, t, abreg, x, ytreg, arg);
+  return dp;
+}
+
+static unsigned char *
+unw_decode_x3 (unsigned char *dp, unsigned char code, void *arg)
+{
+  unsigned char byte1, byte2, abreg, qp;
+  unw_word t, off;
+
+  byte1 = *dp++; byte2 = *dp++;
+  t = unw_decode_uleb128 (&dp);
+  off = unw_decode_uleb128 (&dp);
+
+  qp = (byte1 & 0x3f);
+  abreg = (byte2 & 0x7f);
+
+  if (byte1 & 0x80)
+    UNW_DEC_SPILL_SPREL_P(X3, qp, t, abreg, off, arg);
+  else
+    UNW_DEC_SPILL_PSPREL_P(X3, qp, t, abreg, off, arg);
+  return dp;
+}
+
+static unsigned char *
+unw_decode_x4 (unsigned char *dp, unsigned char code, void *arg)
+{
+  unsigned char byte1, byte2, byte3, qp, abreg, x, ytreg;
+  unw_word t;
+
+  byte1 = *dp++; byte2 = *dp++; byte3 = *dp++;
+  t = unw_decode_uleb128 (&dp);
+
+  qp = (byte1 & 0x3f);
+  abreg = (byte2 & 0x7f);
+  x = (byte2 >> 7) & 1;
+  ytreg = byte3;
+
+  if ((byte2 & 0x80) == 0 && byte3 == 0)
+    UNW_DEC_RESTORE_P(X4, qp, t, abreg, arg);
+  else
+    UNW_DEC_SPILL_REG_P(X4, qp, t, abreg, x, ytreg, arg);
+  return dp;
+}
+
+static inline unsigned char *
+unw_decode_r1 (unsigned char *dp, unsigned char code, void *arg)
+{
+  int body = (code & 0x20) != 0;
+  unw_word rlen;
+
+  rlen = (code & 0x1f);
+  UNW_DEC_PROLOGUE(R1, body, rlen, arg);
+  return dp;
+}
+
+static inline unsigned char *
+unw_decode_r2 (unsigned char *dp, unsigned char code, void *arg)
+{
+  unsigned char byte1, mask, grsave;
+  unw_word rlen;
+
+  byte1 = *dp++;
+
+  mask = ((code & 0x7) << 1) | ((byte1 >> 7) & 1);
+  grsave = (byte1 & 0x7f);
+  rlen = unw_decode_uleb128 (&dp);
+  UNW_DEC_PROLOGUE_GR(R2, rlen, mask, grsave, arg);
+  return dp;
+}
+
+static inline unsigned char *
+unw_decode_r3 (unsigned char *dp, unsigned char code, void *arg)
+{
+  unw_word rlen;
+
+  rlen = unw_decode_uleb128 (&dp);
+  UNW_DEC_PROLOGUE(R3, ((code & 0x3) == 1), rlen, arg);
+  return dp;
+}
+
+static inline unsigned char *
+unw_decode_p1 (unsigned char *dp, unsigned char code, void *arg)
+{
+  unsigned char brmask = (code & 0x1f);
+
+  UNW_DEC_BR_MEM(P1, brmask, arg);
+  return dp;
+}
+
+static inline unsigned char *
+unw_decode_p2_p5 (unsigned char *dp, unsigned char code, void *arg)
+{
+  if ((code & 0x10) == 0)
+    {
+      unsigned char byte1 = *dp++;
+
+      UNW_DEC_BR_GR(P2, ((code & 0xf) << 1) | ((byte1 >> 7) & 1),
+                    (byte1 & 0x7f), arg);
+    }
+  else if ((code & 0x08) == 0)
+    {
+      unsigned char byte1 = *dp++, r, dst;
+
+      r = ((code & 0x7) << 1) | ((byte1 >> 7) & 1);
+      dst = (byte1 & 0x7f);
+      switch (r)
+        {
+        case 0: UNW_DEC_REG_GR(P3, UNW_REG_PSP, dst, arg); break;
+        case 1: UNW_DEC_REG_GR(P3, UNW_REG_RP, dst, arg); break;
+        case 2: UNW_DEC_REG_GR(P3, UNW_REG_PFS, dst, arg); break;
+        case 3: UNW_DEC_REG_GR(P3, UNW_REG_PR, dst, arg); break;
+        case 4: UNW_DEC_REG_GR(P3, UNW_REG_UNAT, dst, arg); break;
+        case 5: UNW_DEC_REG_GR(P3, UNW_REG_LC, dst, arg); break;
+        case 6: UNW_DEC_RP_BR(P3, dst, arg); break;
+        case 7: UNW_DEC_REG_GR(P3, UNW_REG_RNAT, dst, arg); break;
+        case 8: UNW_DEC_REG_GR(P3, UNW_REG_BSP, dst, arg); break;
+        case 9: UNW_DEC_REG_GR(P3, UNW_REG_BSPSTORE, dst, arg); break;
+        case 10: UNW_DEC_REG_GR(P3, UNW_REG_FPSR, dst, arg); break;
+        case 11: UNW_DEC_PRIUNAT_GR(P3, dst, arg); break;
+        default: UNW_DEC_BAD_CODE(r); break;
+        }
+    }
+  else if ((code & 0x7) == 0)
+    UNW_DEC_SPILL_MASK(P4, dp, arg);
+  else if ((code & 0x7) == 1)
+    {
+      unw_word grmask, frmask, byte1, byte2, byte3;
+
+      byte1 = *dp++; byte2 = *dp++; byte3 = *dp++;
+      grmask = ((byte1 >> 4) & 0xf);
+      frmask = ((byte1 & 0xf) << 16) | (byte2 << 8) | byte3;
+      UNW_DEC_FRGR_MEM(P5, grmask, frmask, arg);
+    }
+  else
+    UNW_DEC_BAD_CODE(code);
+  return dp;
+}
+
+static inline unsigned char *
+unw_decode_p6 (unsigned char *dp, unsigned char code, void *arg)
+{
+  int gregs = (code & 0x10) != 0;
+  unsigned char mask = (code & 0x0f);
+
+  if (gregs)
+    UNW_DEC_GR_MEM(P6, mask, arg);
+  else
+    UNW_DEC_FR_MEM(P6, mask, arg);
+  return dp;
+}
+
+static inline unsigned char *
+unw_decode_p7_p10 (unsigned char *dp, unsigned char code, void *arg)
+{
+  unsigned char r, byte1, byte2;
+  unw_word t, size;
+
+  if ((code & 0x10) == 0)
+    {
+      r = (code & 0xf);
+      t = unw_decode_uleb128 (&dp);
+      switch (r)
+        {
+        case 0:
+          size = unw_decode_uleb128 (&dp);
+          UNW_DEC_MEM_STACK_F(P7, t, size, arg);
+          break;
+
+        case 1: UNW_DEC_MEM_STACK_V(P7, t, arg); break;
+        case 2: UNW_DEC_SPILL_BASE(P7, t, arg); break;
+        case 3: UNW_DEC_REG_SPREL(P7, UNW_REG_PSP, t, arg); break;
+        case 4: UNW_DEC_REG_WHEN(P7, UNW_REG_RP, t, arg); break;
+        case 5: UNW_DEC_REG_PSPREL(P7, UNW_REG_RP, t, arg); break;
+        case 6: UNW_DEC_REG_WHEN(P7, UNW_REG_PFS, t, arg); break;
+        case 7: UNW_DEC_REG_PSPREL(P7, UNW_REG_PFS, t, arg); break;
+        case 8: UNW_DEC_REG_WHEN(P7, UNW_REG_PR, t, arg); break;
+        case 9: UNW_DEC_REG_PSPREL(P7, UNW_REG_PR, t, arg); break;
+        case 10: UNW_DEC_REG_WHEN(P7, UNW_REG_LC, t, arg); break;
+        case 11: UNW_DEC_REG_PSPREL(P7, UNW_REG_LC, t, arg); break;
+        case 12: UNW_DEC_REG_WHEN(P7, UNW_REG_UNAT, t, arg); break;
+        case 13: UNW_DEC_REG_PSPREL(P7, UNW_REG_UNAT, t, arg); break;
+        case 14: UNW_DEC_REG_WHEN(P7, UNW_REG_FPSR, t, arg); break;
+        case 15: UNW_DEC_REG_PSPREL(P7, UNW_REG_FPSR, t, arg); break;
+        default: UNW_DEC_BAD_CODE(r); break;
+        }
+    }
+  else
+    {
+      switch (code & 0xf)
+        {
+        case 0x0: /* p8 */
+          {
+            r = *dp++;
+            t = unw_decode_uleb128 (&dp);
+            switch (r)
+              {
+              case  1: UNW_DEC_REG_SPREL(P8, UNW_REG_RP, t, arg); break;
+              case  2: UNW_DEC_REG_SPREL(P8, UNW_REG_PFS, t, arg); break;
+              case  3: UNW_DEC_REG_SPREL(P8, UNW_REG_PR, t, arg); break;
+              case  4: UNW_DEC_REG_SPREL(P8, UNW_REG_LC, t, arg); break;
+              case  5: UNW_DEC_REG_SPREL(P8, UNW_REG_UNAT, t, arg); break;
+              case  6: UNW_DEC_REG_SPREL(P8, UNW_REG_FPSR, t, arg); break;
+              case  7: UNW_DEC_REG_WHEN(P8, UNW_REG_BSP, t, arg); break;
+              case  8: UNW_DEC_REG_PSPREL(P8, UNW_REG_BSP, t, arg); break;
+              case  9: UNW_DEC_REG_SPREL(P8, UNW_REG_BSP, t, arg); break;
+              case 10: UNW_DEC_REG_WHEN(P8, UNW_REG_BSPSTORE, t, arg); break;
+              case 11: UNW_DEC_REG_PSPREL(P8, UNW_REG_BSPSTORE, t, arg); break;
+              case 12: UNW_DEC_REG_SPREL(P8, UNW_REG_BSPSTORE, t, arg); break;
+              case 13: UNW_DEC_REG_WHEN(P8, UNW_REG_RNAT, t, arg); break;
+              case 14: UNW_DEC_REG_PSPREL(P8, UNW_REG_RNAT, t, arg); break;
+              case 15: UNW_DEC_REG_SPREL(P8, UNW_REG_RNAT, t, arg); break;
+              case 16: UNW_DEC_PRIUNAT_WHEN_GR(P8, t, arg); break;
+              case 17: UNW_DEC_PRIUNAT_PSPREL(P8, t, arg); break;
+              case 18: UNW_DEC_PRIUNAT_SPREL(P8, t, arg); break;
+              case 19: UNW_DEC_PRIUNAT_WHEN_MEM(P8, t, arg); break;
+              default: UNW_DEC_BAD_CODE(r); break;
+            }
+          }
+          break;
+
+        case 0x1:
+          byte1 = *dp++; byte2 = *dp++;
+          UNW_DEC_GR_GR(P9, (byte1 & 0xf), (byte2 & 0x7f), arg);
+          break;
+
+        case 0xf: /* p10 */
+          byte1 = *dp++; byte2 = *dp++;
+          UNW_DEC_ABI(P10, byte1, byte2, arg);
+          break;
+
+        case 0x9:
+          return unw_decode_x1 (dp, code, arg);
+
+        case 0xa:
+          return unw_decode_x2 (dp, code, arg);
+
+        case 0xb:
+          return unw_decode_x3 (dp, code, arg);
+
+        case 0xc:
+          return unw_decode_x4 (dp, code, arg);
+
+        default:
+          UNW_DEC_BAD_CODE(code);
+          break;
+        }
+    }
+  return dp;
+}
+
+static inline unsigned char *
+unw_decode_b1 (unsigned char *dp, unsigned char code, void *arg)
+{
+  unw_word label = (code & 0x1f);
+
+  if ((code & 0x20) != 0)
+    UNW_DEC_COPY_STATE(B1, label, arg);
+  else
+    UNW_DEC_LABEL_STATE(B1, label, arg);
+  return dp;
+}
+
+static inline unsigned char *
+unw_decode_b2 (unsigned char *dp, unsigned char code, void *arg)
+{
+  unw_word t;
+
+  t = unw_decode_uleb128 (&dp);
+  UNW_DEC_EPILOGUE(B2, t, (code & 0x1f), arg);
+  return dp;
+}
+
+static inline unsigned char *
+unw_decode_b3_x4 (unsigned char *dp, unsigned char code, void *arg)
+{
+  unw_word t, ecount, label;
+
+  if ((code & 0x10) == 0)
+    {
+      t = unw_decode_uleb128 (&dp);
+      ecount = unw_decode_uleb128 (&dp);
+      UNW_DEC_EPILOGUE(B3, t, ecount, arg);
+    }
+  else if ((code & 0x07) == 0)
+    {
+      label = unw_decode_uleb128 (&dp);
+      if ((code & 0x08) != 0)
+        UNW_DEC_COPY_STATE(B4, label, arg);
+      else
+        UNW_DEC_LABEL_STATE(B4, label, arg);
+    }
+  else
+    switch (code & 0x7)
+      {
+      case 1: return unw_decode_x1 (dp, code, arg);
+      case 2: return unw_decode_x2 (dp, code, arg);
+      case 3: return unw_decode_x3 (dp, code, arg);
+      case 4: return unw_decode_x4 (dp, code, arg);
+      default: UNW_DEC_BAD_CODE(code); break;
+      }
+  return dp;
+}
+
+typedef unsigned char *(*unw_decoder) (unsigned char *, unsigned char, void *);
+
+/*
+ * Decode one descriptor and return address of next descriptor.
+ */
+static inline unsigned char *
+unw_decode (unsigned char *dp, int inside_body, void *arg)
+{
+  unsigned char code, primary;
+
+  code = *dp++;
+  primary = code >> 5;
+
+  if (primary < 2)
+    dp = unw_decode_r1 (dp, code, arg);
+  else if (primary == 2)
+    dp = unw_decode_r2 (dp, code, arg);
+  else if (primary == 3)
+    dp = unw_decode_r3 (dp, code, arg);
+  else if (inside_body)
+    switch (primary)
+      {
+      case 4:
+      case 5: dp = unw_decode_b1 (dp, code, arg); break;
+      case 6: dp = unw_decode_b2 (dp, code, arg); break;
+      case 7: dp = unw_decode_b3_x4 (dp, code, arg); break;
+      }
+  else
+    switch (primary)
+      {
+      case 4: dp = unw_decode_p1 (dp, code, arg); break;
+      case 5: dp = unw_decode_p2_p5 (dp, code, arg); break;
+      case 6: dp = unw_decode_p6 (dp, code, arg); break;
+      case 7: dp = unw_decode_p7_p10 (dp, code, arg); break;
+      }
+  return dp;
+}
diff --git a/src/third_party/unwind/dist/src/ia64/unwind_i.h b/src/third_party/unwind/dist/src/ia64/unwind_i.h
new file mode 100644
index 00000000000..8ccbb46c930
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ia64/unwind_i.h
@@ -0,0 +1,633 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef unwind_i_h
+#define unwind_i_h
+
+#include <string.h>
+#include <inttypes.h>
+
+#include <libunwind-ia64.h>
+
+#include "rse.h"
+
+#include "libunwind_i.h"
+
+#define IA64_UNW_VER(x)             ((x) >> 48)
+#define IA64_UNW_FLAG_MASK          ((unw_word_t) 0x0000ffff00000000ULL)
+#define IA64_UNW_FLAG_OSMASK        ((unw_word_t) 0x0000f00000000000ULL)
+#define IA64_UNW_FLAG_EHANDLER(x)   ((x) & (unw_word_t) 0x0000000100000000ULL)
+#define IA64_UNW_FLAG_UHANDLER(x)   ((x) & (unw_word_t) 0x0000000200000000ULL)
+#define IA64_UNW_LENGTH(x)          ((x) & (unw_word_t) 0x00000000ffffffffULL)
+
+#ifdef MIN
+# undef MIN
+#endif
+#define MIN(a,b)        ((a) < (b) ? (a) : (b))
+
+#if !defined(HAVE_SYS_UC_ACCESS_H) && !defined(UNW_REMOTE_ONLY)
+
+static ALWAYS_INLINE void *
+inlined_uc_addr (ucontext_t *uc, int reg, uint8_t *nat_bitnr)
+{
+  unw_word_t reg_addr;
+  void *addr;
+
+  switch (reg)
+    {
+    case UNW_IA64_GR + 0:       addr = &unw.read_only.r0; break;
+    case UNW_IA64_NAT + 0:      addr = &unw.read_only.r0; break;
+    case UNW_IA64_FR + 0:       addr = &unw.read_only.f0; break;
+    case UNW_IA64_FR + 1:
+      if (__BYTE_ORDER == __BIG_ENDIAN)
+        addr = &unw.read_only.f1_be;
+      else
+        addr = &unw.read_only.f1_le;
+      break;
+    case UNW_IA64_IP:           addr = &uc->uc_mcontext.sc_br[0]; break;
+    case UNW_IA64_CFM:          addr = &uc->uc_mcontext.sc_ar_pfs; break;
+    case UNW_IA64_AR_RNAT:      addr = &uc->uc_mcontext.sc_ar_rnat; break;
+    case UNW_IA64_AR_UNAT:      addr = &uc->uc_mcontext.sc_ar_unat; break;
+    case UNW_IA64_AR_LC:        addr = &uc->uc_mcontext.sc_ar_lc; break;
+    case UNW_IA64_AR_FPSR:      addr = &uc->uc_mcontext.sc_ar_fpsr; break;
+    case UNW_IA64_PR:           addr = &uc->uc_mcontext.sc_pr; break;
+    case UNW_IA64_AR_BSPSTORE:  addr = &uc->uc_mcontext.sc_ar_bsp; break;
+
+    case UNW_IA64_GR + 4 ... UNW_IA64_GR + 7:
+    case UNW_IA64_GR + 12:
+      addr = &uc->uc_mcontext.sc_gr[reg - UNW_IA64_GR];
+      break;
+
+    case UNW_IA64_NAT + 4 ... UNW_IA64_NAT + 7:
+    case UNW_IA64_NAT + 12:
+      addr = &uc->uc_mcontext.sc_nat;
+      reg_addr = (unw_word_t) &uc->uc_mcontext.sc_gr[reg - UNW_IA64_NAT];
+      *nat_bitnr = reg - UNW_IA64_NAT;
+      break;
+
+    case UNW_IA64_BR + 1 ... UNW_IA64_BR + 5:
+      addr = &uc->uc_mcontext.sc_br[reg - UNW_IA64_BR];
+      break;
+
+    case UNW_IA64_FR+ 2 ... UNW_IA64_FR+ 5:
+    case UNW_IA64_FR+16 ... UNW_IA64_FR+31:
+      addr = &uc->uc_mcontext.sc_fr[reg - UNW_IA64_FR];
+      break;
+
+    default:
+      addr = NULL;
+    }
+  return addr;
+}
+
+static inline void *
+uc_addr (ucontext_t *uc, int reg, uint8_t *nat_bitnr)
+{
+  if (__builtin_constant_p (reg))
+    return inlined_uc_addr (uc, reg, nat_bitnr);
+  else
+    return tdep_uc_addr (uc, reg, nat_bitnr);
+}
+
+/* Return TRUE if ADDR points inside unw.read_only_reg.  */
+
+static inline long
+ia64_read_only_reg (void *addr)
+{
+  return ((unsigned long) ((char *) addr - (char *) &unw.read_only)
+          < sizeof (unw.read_only));
+}
+
+#endif /* !defined(HAVE_SYS_UC_ACCESS_H) && !defined(UNW_REMOTE_ONLY) */
+
+/* Bits 0 and 1 of a location are used to encode its type:
+        bit 0: set if location uses floating-point format.
+        bit 1: set if location is a NaT bit on memory stack.  */
+
+#define IA64_LOC_TYPE_FP                (1 << 0)
+#define IA64_LOC_TYPE_MEMSTK_NAT        (1 << 1)
+
+#ifdef UNW_LOCAL_ONLY
+#define IA64_LOC_REG(r,t)       (((r) << 2) | (t))
+#define IA64_LOC_ADDR(a,t)      (((a) & ~0x3) | (t))
+#define IA64_LOC_UC_ADDR(a,t)   IA64_LOC_ADDR(a, t)
+#define IA64_NULL_LOC           (0)
+
+#define IA64_GET_REG(l)         ((l) >> 2)
+#define IA64_GET_ADDR(l)        ((l) & ~0x3)
+#define IA64_IS_NULL_LOC(l)     ((l) == 0)
+#define IA64_IS_FP_LOC(l)       (((l) & IA64_LOC_TYPE_FP) != 0)
+#define IA64_IS_MEMSTK_NAT(l)   (((l) & IA64_LOC_TYPE_MEMSTK_NAT) != 0)
+#define IA64_IS_REG_LOC(l)      0
+#define IA64_IS_UC_LOC(l)       0
+
+#define IA64_REG_LOC(c,r)       ((unw_word_t) uc_addr((c)->as_arg, r, NULL))
+#define IA64_REG_NAT_LOC(c,r,n) ((unw_word_t) uc_addr((c)->as_arg, r, n))
+#define IA64_FPREG_LOC(c,r)                                              \
+        ((unw_word_t) uc_addr((c)->as_arg, (r), NULL) | IA64_LOC_TYPE_FP)
+
+# define ia64_find_proc_info(c,ip,n)                                    \
+        tdep_find_proc_info(unw_local_addr_space, (ip), &(c)->pi, (n),  \
+                            (c)->as_arg)
+# define ia64_put_unwind_info(c, pi)    do { ; } while (0)
+
+/* Note: the register accessors (ia64_{get,set}{,fp}()) must check for
+   NULL locations because uc_addr() returns NULL for unsaved
+   registers.  */
+
+static inline int
+ia64_getfp (struct cursor *c, unw_word_t loc, unw_fpreg_t *val)
+{
+  if (IA64_IS_NULL_LOC (loc))
+    {
+      Debug (16, "access to unsaved register\n");
+      return -UNW_EBADREG;
+    }
+  *val = *(unw_fpreg_t *) IA64_GET_ADDR (loc);
+  return 0;
+}
+
+static inline int
+ia64_putfp (struct cursor *c, unw_word_t loc, unw_fpreg_t val)
+{
+  unw_fpreg_t *addr = (unw_fpreg_t *) IA64_GET_ADDR (loc);
+
+  if (IA64_IS_NULL_LOC (loc))
+    {
+      Debug (16, "access to unsaved register\n");
+      return -UNW_EBADREG;
+    }
+  else if (ia64_read_only_reg (addr))
+    {
+      Debug (16, "attempt to read-only register\n");
+      return -UNW_EREADONLYREG;
+    }
+  *addr = val;
+  return 0;
+}
+
+static inline int
+ia64_get (struct cursor *c, unw_word_t loc, unw_word_t *val)
+{
+  if (IA64_IS_NULL_LOC (loc))
+    {
+      Debug (16, "access to unsaved register\n");
+      return -UNW_EBADREG;
+    }
+  *val = *(unw_word_t *) IA64_GET_ADDR (loc);
+  return 0;
+}
+
+static inline int
+ia64_put (struct cursor *c, unw_word_t loc, unw_word_t val)
+{
+  unw_word_t *addr = (unw_word_t *) IA64_GET_ADDR (loc);
+
+  if (IA64_IS_NULL_LOC (loc))
+    {
+      Debug (16, "access to unsaved register\n");
+      return -UNW_EBADREG;
+    }
+  else if (ia64_read_only_reg (addr))
+    {
+      Debug (16, "attempt to read-only register\n");
+      return -UNW_EREADONLYREG;
+    }
+  *addr = val;
+  return 0;
+}
+
+#else /* !UNW_LOCAL_ONLY */
+
+/* Bits 0 and 1 of the second word (w1) of a location are used
+   to further distinguish what location we're dealing with:
+
+        bit 0: set if the location is a register
+        bit 1: set of the location is accessed via uc_access(3)  */
+#define IA64_LOC_TYPE_REG       (1 << 0)
+#define IA64_LOC_TYPE_UC        (1 << 1)
+
+#define IA64_LOC_REG(r,t)       ((ia64_loc_t) { ((r) << 2) | (t),       \
+                                                IA64_LOC_TYPE_REG })
+#define IA64_LOC_ADDR(a,t)      ((ia64_loc_t) { ((a) & ~0x3) | (t), 0 })
+#define IA64_LOC_UC_ADDR(a,t)   ((ia64_loc_t) { ((a) & ~0x3) | (t),     \
+                                                IA64_LOC_TYPE_UC })
+#define IA64_LOC_UC_REG(r,a)    ((ia64_loc_t) { ((r) << 2),              \
+                                                ((a) | IA64_LOC_TYPE_REG \
+                                                 | IA64_LOC_TYPE_UC) })
+#define IA64_NULL_LOC           ((ia64_loc_t) { 0, 0 })
+
+#define IA64_GET_REG(l)         ((l).w0 >> 2)
+#define IA64_GET_ADDR(l)        ((l).w0 & ~0x3)
+#define IA64_GET_AUX_ADDR(l)    ((l).w1 & ~0x3)
+#define IA64_IS_NULL_LOC(l)     (((l).w0 | (l).w1) == 0)
+#define IA64_IS_FP_LOC(l)       (((l).w0 & IA64_LOC_TYPE_FP) != 0)
+#define IA64_IS_MEMSTK_NAT(l)   (((l).w0 & IA64_LOC_TYPE_MEMSTK_NAT) != 0)
+#define IA64_IS_REG_LOC(l)      (((l).w1 & IA64_LOC_TYPE_REG) != 0)
+#define IA64_IS_UC_LOC(l)       (((l).w1 & IA64_LOC_TYPE_UC) != 0)
+
+#define IA64_REG_LOC(c,r)       IA64_LOC_REG ((r), 0)
+#define IA64_REG_NAT_LOC(c,r,n) IA64_LOC_REG ((r), 0)
+#define IA64_FPREG_LOC(c,r)     IA64_LOC_REG ((r), IA64_LOC_TYPE_FP)
+
+# define ia64_find_proc_info(c,ip,n)                                    \
+        (*(c)->as->acc.find_proc_info)((c)->as, (ip), &(c)->pi, (n),    \
+                                       (c)->as_arg)
+# define ia64_put_unwind_info(c,pi)                                     \
+        (*(c)->as->acc.put_unwind_info)((c)->as, (pi), (c)->as_arg)
+
+#define ia64_uc_access_reg      UNW_OBJ(uc_access_reg)
+#define ia64_uc_access_fpreg    UNW_OBJ(uc_access_fpreg)
+
+extern int ia64_uc_access_reg (struct cursor *c, ia64_loc_t loc,
+                               unw_word_t *valp, int write);
+extern int ia64_uc_access_fpreg (struct cursor *c, ia64_loc_t loc,
+                                 unw_fpreg_t *valp, int write);
+
+static inline int
+ia64_getfp (struct cursor *c, ia64_loc_t loc, unw_fpreg_t *val)
+{
+  unw_word_t addr;
+  int ret;
+
+  if (IA64_IS_NULL_LOC (loc))
+    {
+      Debug (16, "access to unsaved register\n");
+      return -UNW_EBADREG;
+    }
+
+  if (IA64_IS_UC_LOC (loc))
+    return ia64_uc_access_fpreg (c, loc, val, 0);
+
+  if (IA64_IS_REG_LOC (loc))
+    return (*c->as->acc.access_fpreg) (c->as, IA64_GET_REG (loc),
+                                       val, 0, c->as_arg);
+
+  addr = IA64_GET_ADDR (loc);
+  ret = (*c->as->acc.access_mem) (c->as, addr + 0, &val->raw.bits[0], 0,
+                                  c->as_arg);
+  if (ret < 0)
+    return ret;
+
+  return (*c->as->acc.access_mem) (c->as, addr + 8, &val->raw.bits[1], 0,
+                                   c->as_arg);
+}
+
+static inline int
+ia64_putfp (struct cursor *c, ia64_loc_t loc, unw_fpreg_t val)
+{
+  unw_word_t addr;
+  int ret;
+
+  if (IA64_IS_NULL_LOC (loc))
+    {
+      Debug (16, "access to unsaved register\n");
+      return -UNW_EBADREG;
+    }
+
+  if (IA64_IS_UC_LOC (loc))
+    return ia64_uc_access_fpreg (c, loc, &val, 1);
+
+  if (IA64_IS_REG_LOC (loc))
+    return (*c->as->acc.access_fpreg) (c->as, IA64_GET_REG (loc), &val, 1,
+                                       c->as_arg);
+
+  addr = IA64_GET_ADDR (loc);
+  ret = (*c->as->acc.access_mem) (c->as, addr + 0, &val.raw.bits[0], 1,
+                                  c->as_arg);
+  if (ret < 0)
+    return ret;
+
+  return (*c->as->acc.access_mem) (c->as, addr + 8, &val.raw.bits[1], 1,
+                                   c->as_arg);
+}
+
+/* Get the 64 data bits from location LOC.  If bit 0 is cleared, LOC
+   is a memory address, otherwise it is a register number.  If the
+   register is a floating-point register, the 64 bits are read from
+   the significand bits.  */
+
+static inline int
+ia64_get (struct cursor *c, ia64_loc_t loc, unw_word_t *val)
+{
+  if (IA64_IS_NULL_LOC (loc))
+    {
+      Debug (16, "access to unsaved register\n");
+      return -UNW_EBADREG;
+    }
+
+  if (IA64_IS_FP_LOC (loc))
+    {
+      unw_fpreg_t tmp;
+      int ret;
+
+      ret = ia64_getfp (c, loc, &tmp);
+      if (ret < 0)
+        return ret;
+
+      if (c->as->big_endian)
+        *val = tmp.raw.bits[1];
+      else
+        *val = tmp.raw.bits[0];
+      return 0;
+    }
+
+  if (IA64_IS_UC_LOC (loc))
+    return ia64_uc_access_reg (c, loc, val, 0);
+
+  if (IA64_IS_REG_LOC (loc))
+    return (*c->as->acc.access_reg)(c->as, IA64_GET_REG (loc), val, 0,
+                                    c->as_arg);
+  else
+    return (*c->as->acc.access_mem)(c->as, IA64_GET_ADDR (loc), val, 0,
+                                    c->as_arg);
+}
+
+static inline int
+ia64_put (struct cursor *c, ia64_loc_t loc, unw_word_t val)
+{
+  if (IA64_IS_NULL_LOC (loc))
+    {
+      Debug (16, "access to unsaved register\n");
+      return -UNW_EBADREG;
+    }
+
+  if (IA64_IS_FP_LOC (loc))
+    {
+      unw_fpreg_t tmp;
+
+      memset (&tmp, 0, sizeof (tmp));
+      if (c->as->big_endian)
+        tmp.raw.bits[1] = val;
+      else
+        tmp.raw.bits[0] = val;
+      return ia64_putfp (c, loc, tmp);
+    }
+
+  if (IA64_IS_UC_LOC (loc))
+    return ia64_uc_access_reg (c, loc, &val, 1);
+
+  if (IA64_IS_REG_LOC (loc))
+    return (*c->as->acc.access_reg)(c->as, IA64_GET_REG (loc), &val, 1,
+                                    c->as_arg);
+  else
+    return (*c->as->acc.access_mem)(c->as, IA64_GET_ADDR (loc), &val, 1,
+                                    c->as_arg);
+}
+
+#endif /* !UNW_LOCAL_ONLY */
+
+struct ia64_unwind_block
+  {
+    unw_word_t header;
+    unw_word_t desc[0];                 /* unwind descriptors */
+
+    /* Personality routine and language-specific data follow behind
+       descriptors.  */
+  };
+
+enum ia64_where
+  {
+    IA64_WHERE_NONE,    /* register isn't saved at all */
+    IA64_WHERE_GR,      /* register is saved in a general register */
+    IA64_WHERE_FR,      /* register is saved in a floating-point register */
+    IA64_WHERE_BR,      /* register is saved in a branch register */
+    IA64_WHERE_SPREL,   /* register is saved on memstack (sp-relative) */
+    IA64_WHERE_PSPREL,  /* register is saved on memstack (psp-relative) */
+
+    /* At the end of each prologue these locations get resolved to
+       IA64_WHERE_PSPREL and IA64_WHERE_GR, respectively:  */
+
+    IA64_WHERE_SPILL_HOME, /* register is saved in its spill home */
+    IA64_WHERE_GR_SAVE  /* register is saved in next general register */
+  };
+
+#define IA64_WHEN_NEVER 0x7fffffff
+
+struct ia64_reg_info
+  {
+    unw_word_t val;             /* save location: register number or offset */
+    enum ia64_where where;      /* where the register gets saved */
+    int when;                   /* when the register gets saved */
+  };
+
+struct ia64_labeled_state;      /* opaque structure */
+
+struct ia64_reg_state
+  {
+    struct ia64_reg_state *next;    /* next (outer) element on state stack */
+    struct ia64_reg_info reg[IA64_NUM_PREGS];   /* register save locations */
+  };
+
+struct ia64_state_record
+  {
+    unsigned int first_region : 1;      /* is this the first region? */
+    unsigned int done : 1;              /* are we done scanning descriptors? */
+    unsigned int any_spills : 1;        /* got any register spills? */
+    unsigned int in_body : 1;           /* are we inside prologue or body? */
+    uint8_t *imask;             /* imask of spill_mask record or NULL */
+    uint16_t abi_marker;
+
+    unw_word_t pr_val;          /* predicate values */
+    unw_word_t pr_mask;         /* predicate mask */
+
+    long spill_offset;          /* psp-relative offset for spill base */
+    int region_start;
+    int region_len;
+    int when_sp_restored;
+    int epilogue_count;
+    int when_target;
+
+    uint8_t gr_save_loc;        /* next save register */
+    uint8_t return_link_reg;    /* branch register used as return pointer */
+
+    struct ia64_labeled_state *labeled_states;
+    struct ia64_reg_state curr;
+  };
+
+struct ia64_labeled_state
+  {
+    struct ia64_labeled_state *next;    /* next label (or NULL) */
+    unsigned long label;                        /* label for this state */
+    struct ia64_reg_state saved_state;
+  };
+
+/* Convenience macros: */
+#define ia64_make_proc_info             UNW_OBJ(make_proc_info)
+#define ia64_fetch_proc_info            UNW_OBJ(fetch_proc_info)
+#define ia64_create_state_record        UNW_OBJ(create_state_record)
+#define ia64_free_state_record          UNW_OBJ(free_state_record)
+#define ia64_find_save_locs             UNW_OBJ(find_save_locs)
+#define ia64_validate_cache             UNW_OBJ(ia64_validate_cache)
+#define ia64_local_validate_cache       UNW_OBJ(ia64_local_validate_cache)
+#define ia64_per_thread_cache           UNW_OBJ(per_thread_cache)
+#define ia64_scratch_loc                UNW_OBJ(scratch_loc)
+#define ia64_local_resume               UNW_OBJ(local_resume)
+#define ia64_local_addr_space_init      UNW_OBJ(local_addr_space_init)
+#define ia64_strloc                     UNW_OBJ(strloc)
+#define ia64_install_cursor             UNW_OBJ(install_cursor)
+#define rbs_switch                      UNW_OBJ(rbs_switch)
+#define rbs_find_stacked                UNW_OBJ(rbs_find_stacked)
+
+extern int ia64_make_proc_info (struct cursor *c);
+extern int ia64_fetch_proc_info (struct cursor *c, unw_word_t ip,
+                                 int need_unwind_info);
+/* The proc-info must be valid for IP before this routine can be
+   called:  */
+extern int ia64_create_state_record (struct cursor *c,
+                                     struct ia64_state_record *sr);
+extern int ia64_free_state_record (struct ia64_state_record *sr);
+extern int ia64_find_save_locs (struct cursor *c);
+extern void ia64_validate_cache (unw_addr_space_t as, void *arg);
+extern int ia64_local_validate_cache (unw_addr_space_t as, void *arg);
+extern void ia64_local_addr_space_init (void);
+extern ia64_loc_t ia64_scratch_loc (struct cursor *c, unw_regnum_t reg,
+                                    uint8_t *nat_bitnr);
+
+extern NORETURN void ia64_install_cursor (struct cursor *c,
+                                          unw_word_t pri_unat,
+                                          unw_word_t *extra,
+                                          unw_word_t bspstore,
+                                          unw_word_t dirty_size,
+                                          unw_word_t *dirty_partition,
+                                          unw_word_t dirty_rnat);
+extern int ia64_local_resume (unw_addr_space_t as, unw_cursor_t *cursor,
+                              void *arg);
+extern int rbs_switch (struct cursor *c,
+                       unw_word_t saved_bsp, unw_word_t saved_bspstore,
+                       ia64_loc_t saved_rnat_loc);
+extern int rbs_find_stacked (struct cursor *c, unw_word_t regs_to_skip,
+                             ia64_loc_t *locp, ia64_loc_t *rnat_locp);
+
+#ifndef UNW_REMOTE_ONLY
+# define NEED_RBS_COVER_AND_FLUSH
+# define rbs_cover_and_flush    UNW_OBJ(rbs_cover_and_flush)
+  extern int rbs_cover_and_flush (struct cursor *c, unw_word_t nregs,
+                                  unw_word_t *dirty_partition,
+                                  unw_word_t *dirty_rnat,
+                                  unw_word_t *bspstore);
+#endif
+
+/* Warning: ia64_strloc() is for debugging only and it is NOT re-entrant! */
+extern const char *ia64_strloc (ia64_loc_t loc);
+
+/* Return true if the register-backing store is inside a ucontext_t
+   that needs to be accessed via uc_access(3).  */
+
+static inline int
+rbs_on_uc (struct rbs_area *rbs)
+{
+  return IA64_IS_UC_LOC (rbs->rnat_loc) && !IA64_IS_REG_LOC (rbs->rnat_loc);
+}
+
+/* Return true if BSP points to a word that's stored on register
+   backing-store RBS.  */
+static inline int
+rbs_contains (struct rbs_area *rbs, unw_word_t bsp)
+{
+  int result;
+
+  /* Caveat: this takes advantage of unsigned arithmetic.  The full
+     test is (bsp >= rbs->end - rbs->size) && (bsp < rbs->end).  We
+     take advantage of the fact that -n == ~n + 1.  */
+  result = bsp - rbs->end > ~rbs->size;
+  Debug (16, "0x%lx in [0x%lx-0x%lx) => %d\n",
+         (long) bsp, (long) (rbs->end - rbs->size), (long) rbs->end, result);
+  return result;
+}
+
+static inline ia64_loc_t
+rbs_get_rnat_loc (struct rbs_area *rbs, unw_word_t bsp)
+{
+  unw_word_t rnat_addr = rse_rnat_addr (bsp);
+  ia64_loc_t rnat_loc;
+
+  if (rbs_contains (rbs, rnat_addr))
+    {
+      if (rbs_on_uc (rbs))
+        rnat_loc = IA64_LOC_UC_ADDR (rnat_addr, 0);
+      else
+        rnat_loc = IA64_LOC_ADDR (rnat_addr, 0);
+    }
+  else
+    rnat_loc = rbs->rnat_loc;
+  return rnat_loc;
+}
+
+static inline ia64_loc_t
+rbs_loc (struct rbs_area *rbs, unw_word_t bsp)
+{
+  if (rbs_on_uc (rbs))
+    return IA64_LOC_UC_ADDR (bsp, 0);
+  else
+    return IA64_LOC_ADDR (bsp, 0);
+}
+
+static inline int
+ia64_get_stacked (struct cursor *c, unw_word_t reg,
+                  ia64_loc_t *locp, ia64_loc_t *rnat_locp)
+{
+  struct rbs_area *rbs = c->rbs_area + c->rbs_curr;
+  unw_word_t addr, regs_to_skip = reg - 32;
+  int ret = 0;
+
+  assert (reg >= 32 && reg < 128);
+
+  addr = rse_skip_regs (c->bsp, regs_to_skip);
+  if (locp)
+    *locp = rbs_loc (rbs, addr);
+  if (rnat_locp)
+    *rnat_locp = rbs_get_rnat_loc (rbs, addr);
+
+  if (!rbs_contains (rbs, addr))
+    ret = rbs_find_stacked (c, regs_to_skip, locp, rnat_locp);
+  return ret;
+}
+
+/* The UNaT slot # calculation is identical to the one for RNaT slots,
+   but for readability/clarity, we don't want to use
+   ia64_rnat_slot_num() directly.  */
+#define ia64_unat_slot_num(addr)        rse_slot_num(addr)
+
+/* The following are helper macros which makes it easier for libunwind
+   to be used in the kernel.  They allow the kernel to optimize away
+   any unused code without littering everything with #ifdefs.  */
+#define ia64_is_big_endian(c)   ((c)->as->big_endian)
+#define ia64_get_abi(c)         ((c)->as->abi)
+#define ia64_set_abi(c, v)      ((c)->as->abi = (v))
+#define ia64_get_abi_marker(c)  ((c)->last_abi_marker)
+
+/* XXX should be in glibc: */
+#ifndef IA64_SC_FLAG_ONSTACK
+# define IA64_SC_FLAG_ONSTACK_BIT    0 /* running on signal stack? */
+# define IA64_SC_FLAG_IN_SYSCALL_BIT 1 /* did signal interrupt a syscall? */
+# define IA64_SC_FLAG_FPH_VALID_BIT  2 /* is state in f[32]-f[127] valid? */
+
+# define IA64_SC_FLAG_ONSTACK           (1 << IA64_SC_FLAG_ONSTACK_BIT)
+# define IA64_SC_FLAG_IN_SYSCALL        (1 << IA64_SC_FLAG_IN_SYSCALL_BIT)
+# define IA64_SC_FLAG_FPH_VALID         (1 << IA64_SC_FLAG_FPH_VALID_BIT)
+#endif
+
+#endif /* unwind_i_h */
diff --git a/src/third_party/unwind/dist/src/libunwind-generic.pc.in b/src/third_party/unwind/dist/src/libunwind-generic.pc.in
new file mode 100644
index 00000000000..1f3baffe5bd
--- /dev/null
+++ b/src/third_party/unwind/dist/src/libunwind-generic.pc.in
@@ -0,0 +1,11 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: libunwind-generic
+Description: libunwind generic library
+Version: @VERSION@
+Requires: libunwind
+Libs: -L${libdir} -lunwind-generic
+Cflags: -I${includedir}
diff --git a/src/third_party/unwind/dist/src/mi/Gdestroy_addr_space.c b/src/third_party/unwind/dist/src/mi/Gdestroy_addr_space.c
new file mode 100644
index 00000000000..504558e1a78
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/Gdestroy_addr_space.c
@@ -0,0 +1,37 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002, 2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "libunwind_i.h"
+
+void
+unw_destroy_addr_space (unw_addr_space_t as)
+{
+#ifndef UNW_LOCAL_ONLY
+# if UNW_DEBUG
+  memset (as, 0, sizeof (*as));
+# endif
+  free (as);
+#endif
+}
diff --git a/src/third_party/unwind/dist/src/mi/Gdyn-extract.c b/src/third_party/unwind/dist/src/mi/Gdyn-extract.c
new file mode 100644
index 00000000000..5f7682e650d
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/Gdyn-extract.c
@@ -0,0 +1,64 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2002, 2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "libunwind_i.h"
+
+HIDDEN int
+unwi_extract_dynamic_proc_info (unw_addr_space_t as, unw_word_t ip,
+                                unw_proc_info_t *pi, unw_dyn_info_t *di,
+                                int need_unwind_info, void *arg)
+{
+  pi->start_ip = di->start_ip;
+  pi->end_ip = di->end_ip;
+  pi->gp = di->gp;
+  pi->format = di->format;
+  switch (di->format)
+    {
+    case UNW_INFO_FORMAT_DYNAMIC:
+      pi->handler = di->u.pi.handler;
+      pi->lsda = 0;
+      pi->flags = di->u.pi.flags;
+      pi->unwind_info_size = 0;
+      if (need_unwind_info)
+        pi->unwind_info = di;
+      else
+        pi->unwind_info = NULL;
+      return 0;
+
+    case UNW_INFO_FORMAT_TABLE:
+    case UNW_INFO_FORMAT_REMOTE_TABLE:
+    case UNW_INFO_FORMAT_ARM_EXIDX:
+    case UNW_INFO_FORMAT_IP_OFFSET:
+#ifdef tdep_search_unwind_table
+      /* call platform-specific search routine: */
+      return tdep_search_unwind_table (as, ip, di, pi, need_unwind_info, arg);
+#else
+      /* fall through */
+#endif
+    default:
+      break;
+    }
+  return -UNW_EINVAL;
+}
diff --git a/src/third_party/unwind/dist/src/mi/Gdyn-remote.c b/src/third_party/unwind/dist/src/mi/Gdyn-remote.c
new file mode 100644
index 00000000000..40a5ad8b5ab
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/Gdyn-remote.c
@@ -0,0 +1,326 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2002, 2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <stdlib.h>
+
+#include "libunwind_i.h"
+#include "remote.h"
+
+static void
+free_regions (unw_dyn_region_info_t *region)
+{
+  if (region->next)
+    free_regions (region->next);
+  free (region);
+}
+
+static int
+intern_op (unw_addr_space_t as, unw_accessors_t *a, unw_word_t *addr,
+           unw_dyn_op_t *op, void *arg)
+{
+  int ret;
+
+  if ((ret = fetch8 (as, a, addr, &op->tag, arg)) < 0
+      || (ret = fetch8 (as, a, addr, &op->qp, arg)) < 0
+      || (ret = fetch16 (as, a, addr, &op->reg, arg)) < 0
+      || (ret = fetch32 (as, a, addr, &op->when, arg)) < 0
+      || (ret = fetchw  (as, a, addr, &op->val, arg)) < 0)
+    return ret;
+  return 0;
+}
+
+static int
+intern_regions (unw_addr_space_t as, unw_accessors_t *a,
+                unw_word_t *addr, unw_dyn_region_info_t **regionp, void *arg)
+{
+  uint32_t insn_count, op_count, i;
+  unw_dyn_region_info_t *region;
+  unw_word_t next_addr;
+  int ret;
+
+  *regionp = NULL;
+
+  if (!*addr)
+    return 0;   /* NULL region-list */
+
+  if ((ret = fetchw (as, a, addr, &next_addr, arg)) < 0
+      || (ret = fetch32 (as, a, addr, (int32_t *) &insn_count, arg)) < 0
+      || (ret = fetch32 (as, a, addr, (int32_t *) &op_count, arg)) < 0)
+    return ret;
+
+  region = calloc (1, _U_dyn_region_info_size (op_count));
+  if (!region)
+    {
+      ret = -UNW_ENOMEM;
+      goto out;
+    }
+
+  region->insn_count = insn_count;
+  region->op_count = op_count;
+  for (i = 0; i < op_count; ++i)
+    if ((ret = intern_op (as, a, addr, region->op + i, arg)) < 0)
+      goto out;
+
+  if (next_addr)
+    if ((ret = intern_regions (as, a, &next_addr, &region->next, arg)) < 0)
+      goto out;
+
+  *regionp = region;
+  return 0;
+
+ out:
+  if (region)
+    free_regions (region);
+  return ret;
+}
+
+static int
+intern_array (unw_addr_space_t as, unw_accessors_t *a,
+              unw_word_t *addr, unw_word_t table_len, unw_word_t **table_data,
+              void *arg)
+{
+  unw_word_t i, *data = calloc (table_len, WSIZE);
+  int ret = 0;
+
+  if (!data)
+    {
+      ret = -UNW_ENOMEM;
+      goto out;
+    }
+
+  for (i = 0; i < table_len; ++i)
+    if (fetchw (as, a, addr, data + i, arg) < 0)
+      goto out;
+
+  *table_data = data;
+  return 0;
+
+ out:
+  if (data)
+    free (data);
+  return ret;
+}
+
+static void
+free_dyn_info (unw_dyn_info_t *di)
+{
+  switch (di->format)
+    {
+    case UNW_INFO_FORMAT_DYNAMIC:
+      if (di->u.pi.regions)
+        {
+          free_regions (di->u.pi.regions);
+          di->u.pi.regions = NULL;
+        }
+      break;
+
+    case UNW_INFO_FORMAT_TABLE:
+      if (di->u.ti.table_data)
+        {
+          free (di->u.ti.table_data);
+          di->u.ti.table_data = NULL;
+        }
+      break;
+
+    case UNW_INFO_FORMAT_REMOTE_TABLE:
+    default:
+      break;
+    }
+}
+
+static int
+intern_dyn_info (unw_addr_space_t as, unw_accessors_t *a,
+                 unw_word_t *addr, unw_dyn_info_t *di, void *arg)
+{
+  unw_word_t first_region;
+  int ret;
+
+  switch (di->format)
+    {
+    case UNW_INFO_FORMAT_DYNAMIC:
+      if ((ret = fetchw (as, a, addr, &di->u.pi.name_ptr, arg)) < 0
+          || (ret = fetchw (as, a, addr, &di->u.pi.handler, arg)) < 0
+          || (ret = fetch32 (as, a, addr,
+                             (int32_t *) &di->u.pi.flags, arg)) < 0)
+        goto out;
+      *addr += 4;       /* skip over pad0 */
+      if ((ret = fetchw (as, a, addr, &first_region, arg)) < 0
+          || (ret = intern_regions (as, a, &first_region, &di->u.pi.regions,
+                                    arg)) < 0)
+        goto out;
+      break;
+
+    case UNW_INFO_FORMAT_TABLE:
+      if ((ret = fetchw (as, a, addr, &di->u.ti.name_ptr, arg)) < 0
+          || (ret = fetchw (as, a, addr, &di->u.ti.segbase, arg)) < 0
+          || (ret = fetchw (as, a, addr, &di->u.ti.table_len, arg)) < 0
+          || (ret = intern_array (as, a, addr, di->u.ti.table_len,
+                                  &di->u.ti.table_data, arg)) < 0)
+        goto out;
+      break;
+
+    case UNW_INFO_FORMAT_REMOTE_TABLE:
+      if ((ret = fetchw (as, a, addr, &di->u.rti.name_ptr, arg)) < 0
+          || (ret = fetchw (as, a, addr, &di->u.rti.segbase, arg)) < 0
+          || (ret = fetchw (as, a, addr, &di->u.rti.table_len, arg)) < 0
+          || (ret = fetchw (as, a, addr, &di->u.rti.table_data, arg)) < 0)
+        goto out;
+      break;
+
+    default:
+      ret = -UNW_ENOINFO;
+      goto out;
+    }
+  return 0;
+
+ out:
+  free_dyn_info (di);
+  return ret;
+}
+
+HIDDEN int
+unwi_dyn_remote_find_proc_info (unw_addr_space_t as, unw_word_t ip,
+                                unw_proc_info_t *pi,
+                                int need_unwind_info, void *arg)
+{
+  unw_accessors_t *a = unw_get_accessors_int (as);
+  unw_word_t dyn_list_addr, addr, next_addr, gen1, gen2, start_ip, end_ip;
+  unw_dyn_info_t *di = NULL;
+  int ret;
+
+  if (as->dyn_info_list_addr)
+    dyn_list_addr = as->dyn_info_list_addr;
+  else
+    {
+      if ((*a->get_dyn_info_list_addr) (as, &dyn_list_addr, arg) < 0)
+        return -UNW_ENOINFO;
+      if (as->caching_policy != UNW_CACHE_NONE)
+        as->dyn_info_list_addr = dyn_list_addr;
+    }
+
+  do
+    {
+      addr = dyn_list_addr;
+
+      ret = -UNW_ENOINFO;
+
+      if (fetchw (as, a, &addr, &gen1, arg) < 0
+          || fetchw (as, a, &addr, &next_addr, arg) < 0)
+        return ret;
+
+      for (addr = next_addr; addr != 0; addr = next_addr)
+        {
+          if (fetchw (as, a, &addr, &next_addr, arg) < 0)
+            goto recheck;       /* only fail if generation # didn't change */
+
+          addr += WSIZE;        /* skip over prev_addr */
+
+          if (fetchw (as, a, &addr, &start_ip, arg) < 0
+              || fetchw (as, a, &addr, &end_ip, arg) < 0)
+            goto recheck;       /* only fail if generation # didn't change */
+
+          if (ip >= start_ip && ip < end_ip)
+            {
+              if (!di)
+                di = calloc (1, sizeof (*di));
+
+              di->start_ip = start_ip;
+              di->end_ip = end_ip;
+
+              if (fetchw (as, a, &addr, &di->gp, arg) < 0
+                  || fetch32 (as, a, &addr, &di->format, arg) < 0)
+                goto recheck;   /* only fail if generation # didn't change */
+
+              addr += 4;        /* skip over padding */
+
+              if (need_unwind_info
+                  && intern_dyn_info (as, a, &addr, di, arg) < 0)
+                goto recheck;   /* only fail if generation # didn't change */
+
+              if (unwi_extract_dynamic_proc_info (as, ip, pi, di,
+                                                  need_unwind_info, arg) < 0)
+                {
+                  free_dyn_info (di);
+                  goto recheck; /* only fail if generation # didn't change */
+                }
+              ret = 0;  /* OK, found it */
+              break;
+            }
+        }
+
+      /* Re-check generation number to ensure the data we have is
+         consistent.  */
+    recheck:
+      addr = dyn_list_addr;
+      if (fetchw (as, a, &addr, &gen2, arg) < 0)
+        return ret;
+    }
+  while (gen1 != gen2);
+
+  if (ret < 0 && di)
+    free (di);
+
+  return ret;
+}
+
+HIDDEN void
+unwi_dyn_remote_put_unwind_info (unw_addr_space_t as, unw_proc_info_t *pi,
+                                 void *arg)
+{
+  if (!pi->unwind_info)
+    return;
+
+  free_dyn_info (pi->unwind_info);
+  free (pi->unwind_info);
+  pi->unwind_info = NULL;
+}
+
+/* Returns 1 if the cache is up-to-date or -1 if the cache contained
+   stale data and had to be flushed.  */
+
+HIDDEN int
+unwi_dyn_validate_cache (unw_addr_space_t as, void *arg)
+{
+  unw_word_t addr, gen;
+  unw_accessors_t *a;
+
+  if (!as->dyn_info_list_addr)
+    /* If we don't have the dyn_info_list_addr, we don't have anything
+       in the cache.  */
+    return 0;
+
+  a = unw_get_accessors_int (as);
+  addr = as->dyn_info_list_addr;
+
+  if (fetchw (as, a, &addr, &gen, arg) < 0)
+    return 1;
+
+  if (gen == as->dyn_generation)
+    return 1;
+
+  unw_flush_cache (as, 0, 0);
+  as->dyn_generation = gen;
+  return -1;
+}
diff --git a/src/third_party/unwind/dist/src/mi/Gfind_dynamic_proc_info.c b/src/third_party/unwind/dist/src/mi/Gfind_dynamic_proc_info.c
new file mode 100644
index 00000000000..98d35012861
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/Gfind_dynamic_proc_info.c
@@ -0,0 +1,91 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2002, 2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "libunwind_i.h"
+
+#ifdef UNW_REMOTE_ONLY
+
+static inline int
+local_find_proc_info (unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi,
+                      int need_unwind_info, void *arg)
+{
+  return -UNW_ENOINFO;
+}
+
+#else /* !UNW_REMOTE_ONLY */
+
+static inline int
+local_find_proc_info (unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi,
+                      int need_unwind_info, void *arg)
+{
+  unw_dyn_info_list_t *list;
+  unw_dyn_info_t *di;
+
+#ifndef UNW_LOCAL_ONLY
+# pragma weak _U_dyn_info_list_addr
+  if (!_U_dyn_info_list_addr)
+    return -UNW_ENOINFO;
+#endif
+
+  list = (unw_dyn_info_list_t *) (uintptr_t) _U_dyn_info_list_addr ();
+  for (di = list->first; di; di = di->next)
+    if (ip >= di->start_ip && ip < di->end_ip)
+      return unwi_extract_dynamic_proc_info (as, ip, pi, di, need_unwind_info,
+                                             arg);
+  return -UNW_ENOINFO;
+}
+
+#endif /* !UNW_REMOTE_ONLY */
+
+#ifdef UNW_LOCAL_ONLY
+
+static inline int
+remote_find_proc_info (unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi,
+                       int need_unwind_info, void *arg)
+{
+  return -UNW_ENOINFO;
+}
+
+#else /* !UNW_LOCAL_ONLY */
+
+static inline int
+remote_find_proc_info (unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi,
+                       int need_unwind_info, void *arg)
+{
+  return unwi_dyn_remote_find_proc_info (as, ip, pi, need_unwind_info, arg);
+}
+
+#endif /* !UNW_LOCAL_ONLY */
+
+HIDDEN int
+unwi_find_dynamic_proc_info (unw_addr_space_t as, unw_word_t ip,
+                             unw_proc_info_t *pi, int need_unwind_info,
+                             void *arg)
+{
+  if (as == unw_local_addr_space)
+    return local_find_proc_info (as, ip, pi, need_unwind_info, arg);
+  else
+    return remote_find_proc_info (as, ip, pi, need_unwind_info, arg);
+}
diff --git a/src/third_party/unwind/dist/src/mi/Gget_accessors.c b/src/third_party/unwind/dist/src/mi/Gget_accessors.c
new file mode 100644
index 00000000000..31a6fbaf02f
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/Gget_accessors.c
@@ -0,0 +1,37 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002, 2004-2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "libunwind_i.h"
+
+HIDDEN ALIAS(unw_get_accessors) unw_accessors_t *
+unw_get_accessors_int (unw_addr_space_t as);
+
+unw_accessors_t *
+unw_get_accessors (unw_addr_space_t as)
+{
+  if (!tdep_init_done)
+    tdep_init ();
+  return &as->acc;
+}
diff --git a/src/third_party/unwind/dist/src/mi/Gget_fpreg.c b/src/third_party/unwind/dist/src/mi/Gget_fpreg.c
new file mode 100644
index 00000000000..f32b1286257
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/Gget_fpreg.c
@@ -0,0 +1,34 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004-2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "libunwind_i.h"
+
+int
+unw_get_fpreg (unw_cursor_t *cursor, int regnum, unw_fpreg_t *valp)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  return tdep_access_fpreg (c, regnum, valp, 0);
+}
diff --git a/src/third_party/unwind/dist/src/mi/Gget_proc_info_by_ip.c b/src/third_party/unwind/dist/src/mi/Gget_proc_info_by_ip.c
new file mode 100644
index 00000000000..2697ff84e79
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/Gget_proc_info_by_ip.c
@@ -0,0 +1,39 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003, 2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "libunwind_i.h"
+
+int
+unw_get_proc_info_by_ip (unw_addr_space_t as, unw_word_t ip,
+                         unw_proc_info_t *pi, void *as_arg)
+{
+  unw_accessors_t *a = unw_get_accessors_int (as);
+  int ret;
+
+  ret = unwi_find_dynamic_proc_info (as, ip, pi, 0, as_arg);
+  if (ret == -UNW_ENOINFO)
+    ret = (*a->find_proc_info) (as, ip, pi, 0, as_arg);
+  return ret;
+}
diff --git a/src/third_party/unwind/dist/src/mi/Gget_proc_name.c b/src/third_party/unwind/dist/src/mi/Gget_proc_name.c
new file mode 100644
index 00000000000..840d9007f4c
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/Gget_proc_name.c
@@ -0,0 +1,118 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "libunwind_i.h"
+#include "remote.h"
+
+static inline int
+intern_string (unw_addr_space_t as, unw_accessors_t *a,
+               unw_word_t addr, char *buf, size_t buf_len, void *arg)
+{
+  size_t i;
+  int ret;
+
+  for (i = 0; i < buf_len; ++i)
+    {
+      if ((ret = fetch8 (as, a, &addr, (int8_t *) buf + i, arg)) < 0)
+        return ret;
+
+      if (buf[i] == '\0')
+        return 0;               /* copied full string; return success */
+    }
+  buf[buf_len - 1] = '\0';      /* ensure string is NUL terminated */
+  return -UNW_ENOMEM;
+}
+
+static inline int
+get_proc_name (unw_addr_space_t as, unw_word_t ip,
+               char *buf, size_t buf_len, unw_word_t *offp, void *arg)
+{
+  unw_accessors_t *a = unw_get_accessors_int (as);
+  unw_proc_info_t pi;
+  int ret;
+
+  buf[0] = '\0';        /* always return a valid string, even if it's empty */
+
+  ret = unwi_find_dynamic_proc_info (as, ip, &pi, 1, arg);
+  if (ret == 0)
+    {
+      unw_dyn_info_t *di = pi.unwind_info;
+
+      if (offp)
+        *offp = ip - pi.start_ip;
+
+      switch (di->format)
+        {
+        case UNW_INFO_FORMAT_DYNAMIC:
+          ret = intern_string (as, a, di->u.pi.name_ptr, buf, buf_len, arg);
+          break;
+
+        case UNW_INFO_FORMAT_TABLE:
+        case UNW_INFO_FORMAT_REMOTE_TABLE:
+          /* XXX should we create a fake name, e.g.: "tablenameN",
+             where N is the index of the function in the table??? */
+          ret = -UNW_ENOINFO;
+          break;
+
+        default:
+          ret = -UNW_EINVAL;
+          break;
+        }
+      unwi_put_dynamic_unwind_info (as, &pi, arg);
+      return ret;
+    }
+
+  if (ret != -UNW_ENOINFO)
+    return ret;
+
+  /* not a dynamic procedure, try to lookup static procedure name: */
+
+  if (a->get_proc_name)
+    return (*a->get_proc_name) (as, ip, buf, buf_len, offp, arg);
+
+  return -UNW_ENOINFO;
+}
+
+int
+unw_get_proc_name (unw_cursor_t *cursor, char *buf, size_t buf_len,
+                   unw_word_t *offp)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  unw_word_t ip;
+  int error;
+
+  ip = tdep_get_ip (c);
+#if !defined(__ia64__)
+  if (c->dwarf.use_prev_instr)
+    --ip;
+#endif
+  error = get_proc_name (tdep_get_as (c), ip, buf, buf_len, offp,
+                         tdep_get_as_arg (c));
+#if !defined(__ia64__)
+  if (c->dwarf.use_prev_instr && offp != NULL && error == 0)
+    *offp += 1;
+#endif
+  return error;
+}
diff --git a/src/third_party/unwind/dist/src/mi/Gget_reg.c b/src/third_party/unwind/dist/src/mi/Gget_reg.c
new file mode 100644
index 00000000000..9fc725c9c8e
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/Gget_reg.c
@@ -0,0 +1,41 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002, 2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "libunwind_i.h"
+
+int
+unw_get_reg (unw_cursor_t *cursor, int regnum, unw_word_t *valp)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  // We can get the IP value directly without needing a lookup.
+  if (regnum == UNW_REG_IP)
+    {
+      *valp = tdep_get_ip (c);
+      return 0;
+    }
+
+  return tdep_access_reg (c, regnum, valp, 0);
+}
diff --git a/src/third_party/unwind/dist/src/mi/Gput_dynamic_unwind_info.c b/src/third_party/unwind/dist/src/mi/Gput_dynamic_unwind_info.c
new file mode 100644
index 00000000000..ca377c98a8c
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/Gput_dynamic_unwind_info.c
@@ -0,0 +1,55 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2002, 2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "libunwind_i.h"
+
+HIDDEN void
+unwi_put_dynamic_unwind_info (unw_addr_space_t as, unw_proc_info_t *pi,
+                              void *arg)
+{
+  switch (pi->format)
+    {
+    case UNW_INFO_FORMAT_DYNAMIC:
+#ifndef UNW_LOCAL_ONLY
+# ifdef UNW_REMOTE_ONLY
+      unwi_dyn_remote_put_unwind_info (as, pi, arg);
+# else
+      if (as != unw_local_addr_space)
+        unwi_dyn_remote_put_unwind_info (as, pi, arg);
+# endif
+#endif
+      break;
+
+    case UNW_INFO_FORMAT_TABLE:
+    case UNW_INFO_FORMAT_REMOTE_TABLE:
+#ifdef tdep_put_unwind_info
+      tdep_put_unwind_info (as, pi, arg);
+      break;
+#endif
+      /* fall through */
+    default:
+      break;
+    }
+}
diff --git a/src/third_party/unwind/dist/src/mi/Gset_cache_size.c b/src/third_party/unwind/dist/src/mi/Gset_cache_size.c
new file mode 100644
index 00000000000..07b282e2c1d
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/Gset_cache_size.c
@@ -0,0 +1,72 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2014
+        Contributed by Milian Wolff <address@hidden>
+                   and Dave Watson <dade.watson@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "libunwind_i.h"
+
+int
+unw_set_cache_size (unw_addr_space_t as, size_t size, int flag)
+{
+  size_t power = 1;
+  unsigned short log_size = 0;
+
+  if (!tdep_init_done)
+    tdep_init ();
+
+  if (flag != 0)
+    return -1;
+
+  /* Currently not supported for per-thread cache due to memory leak */
+  /* A pthread-key destructor would work, but is not signal safe */
+#if defined(HAVE___THREAD) && HAVE___THREAD
+  return -1;
+#endif
+
+  /* Round up to next power of two, slowly but portably */
+  while(power < size)
+    {
+      power *= 2;
+      log_size++;
+      /* Largest size currently supported by rs_cache */
+      if (log_size >= 15)
+        break;
+    }
+
+#if !defined(__ia64__)
+  if (log_size == as->global_cache.log_size)
+    return 0;   /* no change */
+
+  as->global_cache.log_size = log_size;
+#endif
+
+  /* Ensure caches are empty (and initialized).  */
+  unw_flush_cache (as, 0, 0);
+#ifdef __ia64__
+  return 0;
+#else
+  /* Synchronously purge cache, to ensure memory is allocated */
+  return dwarf_flush_rs_cache(&as->global_cache);
+#endif
+}
diff --git a/src/third_party/unwind/dist/src/mi/Gset_caching_policy.c b/src/third_party/unwind/dist/src/mi/Gset_caching_policy.c
new file mode 100644
index 00000000000..aa3d237146e
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/Gset_caching_policy.c
@@ -0,0 +1,46 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002, 2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "libunwind_i.h"
+
+int
+unw_set_caching_policy (unw_addr_space_t as, unw_caching_policy_t policy)
+{
+  if (!tdep_init_done)
+    tdep_init ();
+
+#if !(defined(HAVE___THREAD) && HAVE___THREAD)
+  if (policy == UNW_CACHE_PER_THREAD)
+    policy = UNW_CACHE_GLOBAL;
+#endif
+
+  if (policy == as->caching_policy)
+    return 0;   /* no change */
+
+  as->caching_policy = policy;
+  /* Ensure caches are empty (and initialized).  */
+  unw_flush_cache (as, 0, 0);
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/mi/Gset_fpreg.c b/src/third_party/unwind/dist/src/mi/Gset_fpreg.c
new file mode 100644
index 00000000000..8c37afd2267
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/Gset_fpreg.c
@@ -0,0 +1,34 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004-2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "libunwind_i.h"
+
+int
+unw_set_fpreg (unw_cursor_t *cursor, int regnum, unw_fpreg_t val)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  return tdep_access_fpreg (c, regnum, &val, 1);
+}
diff --git a/src/third_party/unwind/dist/src/mi/Gset_reg.c b/src/third_party/unwind/dist/src/mi/Gset_reg.c
new file mode 100644
index 00000000000..b1b17703370
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/Gset_reg.c
@@ -0,0 +1,34 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002, 2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "libunwind_i.h"
+
+int
+unw_set_reg (unw_cursor_t *cursor, int regnum, unw_word_t valp)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  return tdep_access_reg (c, regnum, &valp, 1);
+}
diff --git a/src/third_party/unwind/dist/src/mi/Ldestroy_addr_space.c b/src/third_party/unwind/dist/src/mi/Ldestroy_addr_space.c
new file mode 100644
index 00000000000..5bf9364bc73
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/Ldestroy_addr_space.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gdestroy_addr_space.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/mi/Ldyn-extract.c b/src/third_party/unwind/dist/src/mi/Ldyn-extract.c
new file mode 100644
index 00000000000..1802f865f77
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/Ldyn-extract.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gdyn-extract.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/mi/Lfind_dynamic_proc_info.c b/src/third_party/unwind/dist/src/mi/Lfind_dynamic_proc_info.c
new file mode 100644
index 00000000000..bc88e1c53f0
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/Lfind_dynamic_proc_info.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gfind_dynamic_proc_info.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/mi/Lget_accessors.c b/src/third_party/unwind/dist/src/mi/Lget_accessors.c
new file mode 100644
index 00000000000..555e37f30da
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/Lget_accessors.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gget_accessors.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/mi/Lget_fpreg.c b/src/third_party/unwind/dist/src/mi/Lget_fpreg.c
new file mode 100644
index 00000000000..e3be4414378
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/Lget_fpreg.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gget_fpreg.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/mi/Lget_proc_info_by_ip.c b/src/third_party/unwind/dist/src/mi/Lget_proc_info_by_ip.c
new file mode 100644
index 00000000000..96910d83e45
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/Lget_proc_info_by_ip.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gget_proc_info_by_ip.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/mi/Lget_proc_name.c b/src/third_party/unwind/dist/src/mi/Lget_proc_name.c
new file mode 100644
index 00000000000..378097b57a0
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/Lget_proc_name.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gget_proc_name.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/mi/Lget_reg.c b/src/third_party/unwind/dist/src/mi/Lget_reg.c
new file mode 100644
index 00000000000..effe8a80635
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/Lget_reg.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gget_reg.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/mi/Lput_dynamic_unwind_info.c b/src/third_party/unwind/dist/src/mi/Lput_dynamic_unwind_info.c
new file mode 100644
index 00000000000..99597cd5fac
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/Lput_dynamic_unwind_info.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gput_dynamic_unwind_info.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/mi/Lset_cache_size.c b/src/third_party/unwind/dist/src/mi/Lset_cache_size.c
new file mode 100644
index 00000000000..670f64d3a9f
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/Lset_cache_size.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gset_cache_size.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/mi/Lset_caching_policy.c b/src/third_party/unwind/dist/src/mi/Lset_caching_policy.c
new file mode 100644
index 00000000000..cc18816b377
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/Lset_caching_policy.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gset_caching_policy.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/mi/Lset_fpreg.c b/src/third_party/unwind/dist/src/mi/Lset_fpreg.c
new file mode 100644
index 00000000000..2497d404f46
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/Lset_fpreg.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gset_fpreg.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/mi/Lset_reg.c b/src/third_party/unwind/dist/src/mi/Lset_reg.c
new file mode 100644
index 00000000000..c7a872b016f
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/Lset_reg.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gset_reg.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/mi/_ReadSLEB.c b/src/third_party/unwind/dist/src/mi/_ReadSLEB.c
new file mode 100644
index 00000000000..c041e37a054
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/_ReadSLEB.c
@@ -0,0 +1,25 @@
+#include <libunwind.h>
+
+unw_word_t
+_ReadSLEB (unsigned char **dpp)
+{
+  unsigned shift = 0;
+  unw_word_t byte, result = 0;
+  unsigned char *bp = *dpp;
+
+  while (1)
+    {
+      byte = *bp++;
+      result |= (byte & 0x7f) << shift;
+      shift += 7;
+      if ((byte & 0x80) == 0)
+        break;
+    }
+
+  if (shift < 8 * sizeof (unw_word_t) && (byte & 0x40) != 0)
+    /* sign-extend negative value */
+    result |= ((unw_word_t) -1) << shift;
+
+  *dpp = bp;
+  return result;
+}
diff --git a/src/third_party/unwind/dist/src/mi/_ReadULEB.c b/src/third_party/unwind/dist/src/mi/_ReadULEB.c
new file mode 100644
index 00000000000..116f3e19bc9
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/_ReadULEB.c
@@ -0,0 +1,20 @@
+#include <libunwind.h>
+
+unw_word_t
+_ReadULEB (unsigned char **dpp)
+{
+  unsigned shift = 0;
+  unw_word_t byte, result = 0;
+  unsigned char *bp = *dpp;
+
+  while (1)
+    {
+      byte = *bp++;
+      result |= (byte & 0x7f) << shift;
+      if ((byte & 0x80) == 0)
+        break;
+      shift += 7;
+    }
+  *dpp = bp;
+  return result;
+}
diff --git a/src/third_party/unwind/dist/src/mi/backtrace.c b/src/third_party/unwind/dist/src/mi/backtrace.c
new file mode 100644
index 00000000000..c7aa2bdcdcb
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/backtrace.c
@@ -0,0 +1,81 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2002 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef UNW_REMOTE_ONLY
+
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#include <libunwind_i.h>
+#include <string.h>
+
+/* See glibc manual for a description of this function.  */
+
+static ALWAYS_INLINE int
+slow_backtrace (void **buffer, int size, unw_context_t *uc)
+{
+  unw_cursor_t cursor;
+  unw_word_t ip;
+  int n = 0;
+
+  if (unlikely (unw_init_local (&cursor, uc) < 0))
+    return 0;
+
+  while (unw_step (&cursor) > 0)
+    {
+      if (n >= size)
+        return n;
+
+      if (unw_get_reg (&cursor, UNW_REG_IP, &ip) < 0)
+        return n;
+      buffer[n++] = (void *) (uintptr_t) ip;
+    }
+  return n;
+}
+
+int
+unw_backtrace (void **buffer, int size)
+{
+  unw_cursor_t cursor;
+  unw_context_t uc;
+  int n = size;
+
+  tdep_getcontext_trace (&uc);
+
+  if (unlikely (unw_init_local (&cursor, &uc) < 0))
+    return 0;
+
+  if (unlikely (tdep_trace (&cursor, buffer, &n) < 0))
+    {
+      unw_getcontext (&uc);
+      return slow_backtrace (buffer, size, &uc);
+    }
+
+  return n;
+}
+
+extern int backtrace (void **buffer, int size)
+  WEAK ALIAS(unw_backtrace);
+
+#endif /* !UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/dist/src/mi/dyn-cancel.c b/src/third_party/unwind/dist/src/mi/dyn-cancel.c
new file mode 100644
index 00000000000..9d7472d5fdf
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/dyn-cancel.c
@@ -0,0 +1,46 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2002, 2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "libunwind_i.h"
+
+void
+_U_dyn_cancel (unw_dyn_info_t *di)
+{
+  mutex_lock (&_U_dyn_info_list_lock);
+  {
+    ++_U_dyn_info_list.generation;
+
+    if (di->prev)
+      di->prev->next = di->next;
+    else
+      _U_dyn_info_list.first = di->next;
+
+    if (di->next)
+      di->next->prev = di->prev;
+  }
+  mutex_unlock (&_U_dyn_info_list_lock);
+
+  di->next = di->prev = NULL;
+}
diff --git a/src/third_party/unwind/dist/src/mi/dyn-info-list.c b/src/third_party/unwind/dist/src/mi/dyn-info-list.c
new file mode 100644
index 00000000000..1c7c55090a6
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/dyn-info-list.c
@@ -0,0 +1,34 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2002, 2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "libunwind_i.h"
+
+HIDDEN unw_dyn_info_list_t _U_dyn_info_list;
+
+unw_word_t
+_U_dyn_info_list_addr (void)
+{
+  return (unw_word_t) (uintptr_t) &_U_dyn_info_list;
+}
diff --git a/src/third_party/unwind/dist/src/mi/dyn-register.c b/src/third_party/unwind/dist/src/mi/dyn-register.c
new file mode 100644
index 00000000000..efdad3de076
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/dyn-register.c
@@ -0,0 +1,44 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2002, 2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "libunwind_i.h"
+
+HIDDEN define_lock (_U_dyn_info_list_lock);
+
+void
+_U_dyn_register (unw_dyn_info_t *di)
+{
+  mutex_lock (&_U_dyn_info_list_lock);
+  {
+    ++_U_dyn_info_list.generation;
+
+    di->next = _U_dyn_info_list.first;
+    di->prev = NULL;
+    if (di->next)
+            di->next->prev = di;
+    _U_dyn_info_list.first = di;
+  }
+  mutex_unlock (&_U_dyn_info_list_lock);
+}
diff --git a/src/third_party/unwind/dist/src/mi/flush_cache.c b/src/third_party/unwind/dist/src/mi/flush_cache.c
new file mode 100644
index 00000000000..f2b01158a0e
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/flush_cache.c
@@ -0,0 +1,62 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002-2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "libunwind_i.h"
+
+void
+unw_flush_cache (unw_addr_space_t as, unw_word_t lo, unw_word_t hi)
+{
+#if !UNW_TARGET_IA64
+  struct unw_debug_frame_list *w = as->debug_frames;
+
+  while (w)
+    {
+      struct unw_debug_frame_list *n = w->next;
+
+      if (w->index)
+        munmap (w->index, w->index_size);
+
+      munmap (w->debug_frame, w->debug_frame_size);
+      munmap (w, sizeof (*w));
+      w = n;
+    }
+  as->debug_frames = NULL;
+#endif
+
+  /* clear dyn_info_list_addr cache: */
+  as->dyn_info_list_addr = 0;
+
+  /* This lets us flush caches lazily.  The implementation currently
+     ignores the flush range arguments (lo-hi).  This is OK because
+     unw_flush_cache() is allowed to flush more than the requested
+     range. */
+
+#ifdef HAVE_FETCH_AND_ADD
+  fetch_and_add1 (&as->cache_generation);
+#else
+# warning unw_flush_cache(): need a way to atomically increment an integer.
+  ++as->cache_generation;
+#endif
+}
diff --git a/src/third_party/unwind/dist/src/mi/init.c b/src/third_party/unwind/dist/src/mi/init.c
new file mode 100644
index 00000000000..60a48c58928
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/init.c
@@ -0,0 +1,60 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002-2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "libunwind_i.h"
+
+HIDDEN intrmask_t unwi_full_mask;
+
+static const char rcsid[] UNUSED =
+  "$Id: " PACKAGE_STRING " --- report bugs to " PACKAGE_BUGREPORT " $";
+
+#if UNW_DEBUG
+
+/* Must not be declared HIDDEN because libunwind.so and
+   libunwind-PLATFORM.so will both define their own copies of this
+   variable and we want to use only one or the other when both
+   libraries are loaded.  */
+long unwi_debug_level;
+
+#endif /* UNW_DEBUG */
+
+HIDDEN void
+mi_init (void)
+{
+#if UNW_DEBUG
+  const char *str = getenv ("UNW_DEBUG_LEVEL");
+
+  if (str)
+    unwi_debug_level = atoi (str);
+
+  if (unwi_debug_level > 0)
+    {
+      setbuf (stdout, NULL);
+      setbuf (stderr, NULL);
+    }
+#endif
+
+  assert (sizeof (struct cursor) <= sizeof (unw_cursor_t));
+}
diff --git a/src/third_party/unwind/dist/src/mi/mempool.c b/src/third_party/unwind/dist/src/mi/mempool.c
new file mode 100644
index 00000000000..536b64e8157
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/mempool.c
@@ -0,0 +1,184 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002-2003, 2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "libunwind_i.h"
+
+/* From GCC docs: ``Gcc also provides a target specific macro
+ * __BIGGEST_ALIGNMENT__, which is the largest alignment ever used for any data
+ * type on the target machine you are compiling for.'' */
+#ifdef __BIGGEST_ALIGNMENT__
+# define MAX_ALIGN      __BIGGEST_ALIGNMENT__
+#else
+/* Crude hack to check that MAX_ALIGN is power-of-two.
+ * sizeof(long double) = 12 on i386. */
+# define MAX_ALIGN_(n)  (n < 8 ? 8 : \
+                         n < 16 ? 16 : n)
+# define MAX_ALIGN      MAX_ALIGN_(sizeof (long double))
+#endif
+
+static char sos_memory[SOS_MEMORY_SIZE] ALIGNED(MAX_ALIGN);
+static size_t sos_memory_freepos;
+static size_t pg_size;
+
+HIDDEN void *
+sos_alloc (size_t size)
+{
+  size_t pos;
+
+  size = UNW_ALIGN(size, MAX_ALIGN);
+
+#if defined(__GNUC__) && defined(HAVE_FETCH_AND_ADD)
+  /* Assume `sos_memory' is suitably aligned. */
+  assert(((uintptr_t) &sos_memory[0] & (MAX_ALIGN-1)) == 0);
+
+  pos = fetch_and_add (&sos_memory_freepos, size);
+#else
+  static define_lock (sos_lock);
+  intrmask_t saved_mask;
+
+  lock_acquire (&sos_lock, saved_mask);
+  {
+    /* No assumptions about `sos_memory' alignment. */
+    if (sos_memory_freepos == 0)
+      {
+        unsigned align = UNW_ALIGN((uintptr_t) &sos_memory[0], MAX_ALIGN)
+                                - (uintptr_t) &sos_memory[0];
+        sos_memory_freepos = align;
+      }
+    pos = sos_memory_freepos;
+    sos_memory_freepos += size;
+  }
+  lock_release (&sos_lock, saved_mask);
+#endif
+
+  assert (((uintptr_t) &sos_memory[pos] & (MAX_ALIGN-1)) == 0);
+  assert ((pos+size) <= SOS_MEMORY_SIZE);
+
+  return &sos_memory[pos];
+}
+
+/* Must be called while holding the mempool lock. */
+
+static void
+free_object (struct mempool *pool, void *object)
+{
+  struct object *obj = object;
+
+  obj->next = pool->free_list;
+  pool->free_list = obj;
+  ++pool->num_free;
+}
+
+static void
+add_memory (struct mempool *pool, char *mem, size_t size, size_t obj_size)
+{
+  char *obj;
+
+  for (obj = mem; obj <= mem + size - obj_size; obj += obj_size)
+    free_object (pool, obj);
+}
+
+static void
+expand (struct mempool *pool)
+{
+  size_t size;
+  char *mem;
+
+  size = pool->chunk_size;
+  GET_MEMORY (mem, size);
+  if (!mem)
+    {
+      size = UNW_ALIGN(pool->obj_size, pg_size);
+      GET_MEMORY (mem, size);
+      if (!mem)
+        {
+          /* last chance: try to allocate one object from the SOS memory */
+          size = pool->obj_size;
+          mem = sos_alloc (size);
+        }
+    }
+  add_memory (pool, mem, size, pool->obj_size);
+}
+
+HIDDEN void
+mempool_init (struct mempool *pool, size_t obj_size, size_t reserve)
+{
+  if (pg_size == 0)
+    pg_size = getpagesize ();
+
+  memset (pool, 0, sizeof (*pool));
+
+  lock_init (&pool->lock);
+
+  /* round object-size up to integer multiple of MAX_ALIGN */
+  obj_size = UNW_ALIGN(obj_size, MAX_ALIGN);
+
+  if (!reserve)
+    {
+      reserve = pg_size / obj_size / 4;
+      if (!reserve)
+        reserve = 16;
+    }
+
+  pool->obj_size = obj_size;
+  pool->reserve = reserve;
+  pool->chunk_size = UNW_ALIGN(2*reserve*obj_size, pg_size);
+
+  expand (pool);
+}
+
+HIDDEN void *
+mempool_alloc (struct mempool *pool)
+{
+  intrmask_t saved_mask;
+  struct object *obj;
+
+  lock_acquire (&pool->lock, saved_mask);
+  {
+    if (pool->num_free <= pool->reserve)
+      expand (pool);
+
+    assert (pool->num_free > 0);
+
+    --pool->num_free;
+    obj = pool->free_list;
+    pool->free_list = obj->next;
+  }
+  lock_release (&pool->lock, saved_mask);
+  return obj;
+}
+
+HIDDEN void
+mempool_free (struct mempool *pool, void *object)
+{
+  intrmask_t saved_mask;
+
+  lock_acquire (&pool->lock, saved_mask);
+  {
+    free_object (pool, object);
+  }
+  lock_release (&pool->lock, saved_mask);
+}
diff --git a/src/third_party/unwind/dist/src/mi/strerror.c b/src/third_party/unwind/dist/src/mi/strerror.c
new file mode 100644
index 00000000000..2cec73d1db9
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mi/strerror.c
@@ -0,0 +1,51 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004 BEA Systems
+        Contributed by Thomas Hallgren <thallgre@bea.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "libunwind_i.h"
+
+/* Returns the text corresponding to the given err_code or the
+   text "invalid error code" if the err_code is invalid.  */
+const char *
+unw_strerror (int err_code)
+{
+  const char *cp;
+  unw_error_t error = (unw_error_t)-err_code;
+  switch (error)
+    {
+    case UNW_ESUCCESS:     cp = "no error"; break;
+    case UNW_EUNSPEC:      cp = "unspecified (general) error"; break;
+    case UNW_ENOMEM:       cp = "out of memory"; break;
+    case UNW_EBADREG:      cp = "bad register number"; break;
+    case UNW_EREADONLYREG: cp = "attempt to write read-only register"; break;
+    case UNW_ESTOPUNWIND:  cp = "stop unwinding"; break;
+    case UNW_EINVALIDIP:   cp = "invalid IP"; break;
+    case UNW_EBADFRAME:    cp = "bad frame"; break;
+    case UNW_EINVAL:       cp = "unsupported operation or bad value"; break;
+    case UNW_EBADVERSION:  cp = "unwind info has unsupported version"; break;
+    case UNW_ENOINFO:      cp = "no unwind info found"; break;
+    default:               cp = "invalid error code";
+    }
+  return cp;
+}
diff --git a/src/third_party/unwind/dist/src/mips/Gapply_reg_state.c b/src/third_party/unwind/dist/src/mips/Gapply_reg_state.c
new file mode 100644
index 00000000000..82f056da67e
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/Gapply_reg_state.c
@@ -0,0 +1,37 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_apply_reg_state (unw_cursor_t *cursor,
+		     void *reg_states_data)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  return dwarf_apply_reg_state (&c->dwarf, (dwarf_reg_state_t *)reg_states_data);
+}
diff --git a/src/third_party/unwind/dist/src/mips/Gcreate_addr_space.c b/src/third_party/unwind/dist/src/mips/Gcreate_addr_space.c
new file mode 100644
index 00000000000..c2408b95edc
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/Gcreate_addr_space.c
@@ -0,0 +1,74 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <stdlib.h>
+
+#include "unwind_i.h"
+
+unw_addr_space_t
+unw_create_addr_space (unw_accessors_t *a, int byte_order)
+{
+#ifdef UNW_LOCAL_ONLY
+  return NULL;
+#else
+  unw_addr_space_t as;
+
+  /*
+   * MIPS supports only big or little-endian, not weird stuff like
+   * PDP_ENDIAN.
+   */
+  if (byte_order != 0
+      && byte_order != __LITTLE_ENDIAN
+      && byte_order != __BIG_ENDIAN)
+    return NULL;
+
+  as = malloc (sizeof (*as));
+  if (!as)
+    return NULL;
+
+  memset (as, 0, sizeof (*as));
+
+  as->acc = *a;
+
+  if (byte_order == 0)
+    /* use host default: */
+    as->big_endian = (__BYTE_ORDER == __BIG_ENDIAN);
+  else
+    as->big_endian = (byte_order == __BIG_ENDIAN);
+
+  /* FIXME!  There is no way to specify the ABI.  */
+#if _MIPS_SIM == _ABIO32
+  as->abi = UNW_MIPS_ABI_O32;
+#elif _MIPS_SIM == _ABIN32
+  as->abi = UNW_MIPS_ABI_N32;
+#elif _MIPS_SIM == _ABI64
+  as->abi = UNW_MIPS_ABI_N64;
+#else
+# error Unsupported ABI
+#endif
+  as->addr_size = 4;
+
+  return as;
+#endif
+}
diff --git a/src/third_party/unwind/dist/src/mips/Gget_proc_info.c b/src/third_party/unwind/dist/src/mips/Gget_proc_info.c
new file mode 100644
index 00000000000..04c4326d45c
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/Gget_proc_info.c
@@ -0,0 +1,44 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_get_proc_info (unw_cursor_t *cursor, unw_proc_info_t *pi)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  int ret;
+
+  ret = dwarf_make_proc_info (&c->dwarf);
+  if (ret < 0) {
+    /* Construct a dummy proc info if Dwarf failed */
+    memset (pi, 0, sizeof (*pi));
+    pi->start_ip = c->dwarf.ip;
+    pi->end_ip = c->dwarf.ip + 4;
+    return 0;
+  }
+
+  *pi = c->dwarf.pi;
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/mips/Gget_save_loc.c b/src/third_party/unwind/dist/src/mips/Gget_save_loc.c
new file mode 100644
index 00000000000..c21f9b06d06
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/Gget_save_loc.c
@@ -0,0 +1,100 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+/* FIXME for MIPS.  */
+
+int
+unw_get_save_loc (unw_cursor_t *cursor, int reg, unw_save_loc_t *sloc)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  dwarf_loc_t loc;
+
+  loc = DWARF_NULL_LOC;         /* default to "not saved" */
+
+  switch (reg)
+    {
+    case UNW_MIPS_R0:
+    case UNW_MIPS_R1:
+    case UNW_MIPS_R2:
+    case UNW_MIPS_R3:
+    case UNW_MIPS_R4:
+    case UNW_MIPS_R5:
+    case UNW_MIPS_R6:
+    case UNW_MIPS_R7:
+    case UNW_MIPS_R8:
+    case UNW_MIPS_R9:
+    case UNW_MIPS_R10:
+    case UNW_MIPS_R11:
+    case UNW_MIPS_R12:
+    case UNW_MIPS_R13:
+    case UNW_MIPS_R14:
+    case UNW_MIPS_R15:
+    case UNW_MIPS_R16:
+    case UNW_MIPS_R17:
+    case UNW_MIPS_R18:
+    case UNW_MIPS_R19:
+    case UNW_MIPS_R20:
+    case UNW_MIPS_R21:
+    case UNW_MIPS_R22:
+    case UNW_MIPS_R23:
+    case UNW_MIPS_R24:
+    case UNW_MIPS_R25:
+    case UNW_MIPS_R26:
+    case UNW_MIPS_R27:
+    case UNW_MIPS_R28:
+    case UNW_MIPS_R29:
+    case UNW_MIPS_R30:
+    case UNW_MIPS_R31:
+    case UNW_MIPS_PC:
+      loc = c->dwarf.loc[reg - UNW_MIPS_R0];
+      break;
+
+    default:
+      break;
+    }
+
+  memset (sloc, 0, sizeof (*sloc));
+
+  if (DWARF_IS_NULL_LOC (loc))
+    {
+      sloc->type = UNW_SLT_NONE;
+      return 0;
+    }
+
+#if !defined(UNW_LOCAL_ONLY)
+  if (DWARF_IS_REG_LOC (loc))
+    {
+      sloc->type = UNW_SLT_REG;
+      sloc->u.regnum = DWARF_GET_LOC (loc);
+    }
+  else
+#endif
+    {
+      sloc->type = UNW_SLT_MEMORY;
+      sloc->u.addr = DWARF_GET_LOC (loc);
+    }
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/mips/Gglobal.c b/src/third_party/unwind/dist/src/mips/Gglobal.c
new file mode 100644
index 00000000000..fa9478eebe7
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/Gglobal.c
@@ -0,0 +1,55 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "dwarf_i.h"
+
+HIDDEN define_lock (mips_lock);
+HIDDEN int tdep_init_done;
+
+HIDDEN void
+tdep_init (void)
+{
+  intrmask_t saved_mask;
+
+  sigfillset (&unwi_full_mask);
+
+  lock_acquire (&mips_lock, saved_mask);
+  {
+    if (tdep_init_done)
+      /* another thread else beat us to it... */
+      goto out;
+
+    mi_init ();
+
+    dwarf_init ();
+
+#ifndef UNW_REMOTE_ONLY
+    mips_local_addr_space_init ();
+#endif
+    tdep_init_done = 1; /* signal that we're initialized... */
+  }
+ out:
+  lock_release (&mips_lock, saved_mask);
+}
diff --git a/src/third_party/unwind/dist/src/mips/Ginit.c b/src/third_party/unwind/dist/src/mips/Ginit.c
new file mode 100644
index 00000000000..3df170c7549
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/Ginit.c
@@ -0,0 +1,210 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "unwind_i.h"
+
+#ifdef UNW_REMOTE_ONLY
+
+/* unw_local_addr_space is a NULL pointer in this case.  */
+unw_addr_space_t unw_local_addr_space;
+
+#else /* !UNW_REMOTE_ONLY */
+
+static struct unw_addr_space local_addr_space;
+
+unw_addr_space_t unw_local_addr_space = &local_addr_space;
+
+/* Return the address of the 64-bit slot in UC for REG (even for o32,
+   where registers are 32-bit, the slots are still 64-bit).  */
+
+static inline void *
+uc_addr (ucontext_t *uc, int reg)
+{
+  if (reg >= UNW_MIPS_R0 && reg < UNW_MIPS_R0 + 32)
+    return &uc->uc_mcontext.gregs[reg - UNW_MIPS_R0];
+  else if (reg == UNW_MIPS_PC)
+    return &uc->uc_mcontext.pc;
+  else
+    return NULL;
+}
+
+# ifdef UNW_LOCAL_ONLY
+
+HIDDEN void *
+tdep_uc_addr (ucontext_t *uc, int reg)
+{
+  char *addr = uc_addr (uc, reg);
+
+  if (((reg >= UNW_MIPS_R0 && reg <= UNW_MIPS_R31) || reg == UNW_MIPS_PC)
+      && tdep_big_endian (unw_local_addr_space)
+      && unw_local_addr_space->abi == UNW_MIPS_ABI_O32)
+    addr += 4;
+
+  return addr;
+}
+
+# endif /* UNW_LOCAL_ONLY */
+
+HIDDEN unw_dyn_info_list_t _U_dyn_info_list;
+
+/* XXX fix me: there is currently no way to locate the dyn-info list
+       by a remote unwinder.  On ia64, this is done via a special
+       unwind-table entry.  Perhaps something similar can be done with
+       DWARF2 unwind info.  */
+
+static void
+put_unwind_info (unw_addr_space_t as, unw_proc_info_t *proc_info, void *arg)
+{
+  /* it's a no-op */
+}
+
+static int
+get_dyn_info_list_addr (unw_addr_space_t as, unw_word_t *dyn_info_list_addr,
+                        void *arg)
+{
+  *dyn_info_list_addr = (unw_word_t) (intptr_t) &_U_dyn_info_list;
+  return 0;
+}
+
+static int
+access_mem (unw_addr_space_t as, unw_word_t addr, unw_word_t *val, int write,
+            void *arg)
+{
+  if (write)
+    {
+      Debug (16, "mem[%llx] <- %llx\n", (long long) addr, (long long) *val);
+      *(unw_word_t *) (intptr_t) addr = *val;
+    }
+  else
+    {
+      *val = *(unw_word_t *) (intptr_t) addr;
+      Debug (16, "mem[%llx] -> %llx\n", (long long) addr, (long long) *val);
+    }
+  return 0;
+}
+
+static int
+access_reg (unw_addr_space_t as, unw_regnum_t reg, unw_word_t *val, int write,
+            void *arg)
+{
+  unw_word_t *addr;
+  ucontext_t *uc = arg;
+
+  if (unw_is_fpreg (reg))
+    goto badreg;
+
+  Debug (16, "reg = %s\n", unw_regname (reg));
+  if (!(addr = uc_addr (uc, reg)))
+    goto badreg;
+
+  if (write)
+    {
+      *(unw_word_t *) (intptr_t) addr = (mips_reg_t) *val;
+      Debug (12, "%s <- %llx\n", unw_regname (reg), (long long) *val);
+    }
+  else
+    {
+      *val = (mips_reg_t) *(unw_word_t *) (intptr_t) addr;
+      Debug (12, "%s -> %llx\n", unw_regname (reg), (long long) *val);
+    }
+  return 0;
+
+ badreg:
+  Debug (1, "bad register number %u\n", reg);
+  return -UNW_EBADREG;
+}
+
+static int
+access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val,
+              int write, void *arg)
+{
+  ucontext_t *uc = arg;
+  unw_fpreg_t *addr;
+
+  if (!unw_is_fpreg (reg))
+    goto badreg;
+
+  if (!(addr = uc_addr (uc, reg)))
+    goto badreg;
+
+  if (write)
+    {
+      Debug (12, "%s <- %08lx.%08lx.%08lx\n", unw_regname (reg),
+             ((long *)val)[0], ((long *)val)[1], ((long *)val)[2]);
+      *(unw_fpreg_t *) (intptr_t) addr = *val;
+    }
+  else
+    {
+      *val = *(unw_fpreg_t *) (intptr_t) addr;
+      Debug (12, "%s -> %08lx.%08lx.%08lx\n", unw_regname (reg),
+             ((long *)val)[0], ((long *)val)[1], ((long *)val)[2]);
+    }
+  return 0;
+
+ badreg:
+  Debug (1, "bad register number %u\n", reg);
+  /* attempt to access a non-preserved register */
+  return -UNW_EBADREG;
+}
+
+static int
+get_static_proc_name (unw_addr_space_t as, unw_word_t ip,
+                      char *buf, size_t buf_len, unw_word_t *offp,
+                      void *arg)
+{
+
+  return elf_w (get_proc_name) (as, getpid (), ip, buf, buf_len, offp);
+}
+
+HIDDEN void
+mips_local_addr_space_init (void)
+{
+  memset (&local_addr_space, 0, sizeof (local_addr_space));
+  local_addr_space.big_endian = (__BYTE_ORDER == __BIG_ENDIAN);
+#if _MIPS_SIM == _ABIO32
+  local_addr_space.abi = UNW_MIPS_ABI_O32;
+#elif _MIPS_SIM == _ABIN32
+  local_addr_space.abi = UNW_MIPS_ABI_N32;
+#elif _MIPS_SIM == _ABI64
+  local_addr_space.abi = UNW_MIPS_ABI_N64;
+#else
+# error Unsupported ABI
+#endif
+  local_addr_space.addr_size = sizeof (void *);
+  local_addr_space.caching_policy = UNWI_DEFAULT_CACHING_POLICY;
+  local_addr_space.acc.find_proc_info = dwarf_find_proc_info;
+  local_addr_space.acc.put_unwind_info = put_unwind_info;
+  local_addr_space.acc.get_dyn_info_list_addr = get_dyn_info_list_addr;
+  local_addr_space.acc.access_mem = access_mem;
+  local_addr_space.acc.access_reg = access_reg;
+  local_addr_space.acc.access_fpreg = access_fpreg;
+  local_addr_space.acc.resume = NULL;  /* mips_local_resume?  FIXME!  */
+  local_addr_space.acc.get_proc_name = get_static_proc_name;
+  unw_flush_cache (&local_addr_space, 0, 0);
+}
+
+#endif /* !UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/dist/src/mips/Ginit_local.c b/src/third_party/unwind/dist/src/mips/Ginit_local.c
new file mode 100644
index 00000000000..f3153b5ba03
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/Ginit_local.c
@@ -0,0 +1,76 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "init.h"
+
+#ifdef UNW_REMOTE_ONLY
+
+int
+unw_init_local (unw_cursor_t *cursor, ucontext_t *uc)
+{
+  return -UNW_EINVAL;
+}
+
+#else /* !UNW_REMOTE_ONLY */
+
+static int
+unw_init_local_common(unw_cursor_t *cursor, ucontext_t *uc, unsigned use_prev_instr)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  if (!tdep_init_done)
+    tdep_init ();
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  c->dwarf.as = unw_local_addr_space;
+  c->dwarf.as_arg = uc;
+  return common_init (c, use_prev_instr);
+}
+
+int
+unw_init_local(unw_cursor_t *cursor, ucontext_t *uc)
+{
+  return unw_init_local_common(cursor, uc, 1);
+}
+
+int
+unw_init_local2 (unw_cursor_t *cursor, ucontext_t *uc, int flag)
+{
+  if (!flag)
+    {
+      return unw_init_local_common(cursor, uc, 1);
+    }
+  else if (flag == UNW_INIT_SIGNAL_FRAME)
+    {
+      return unw_init_local_common(cursor, uc, 0);
+    }
+  else
+    {
+      return -UNW_EINVAL;
+    }
+}
+
+#endif /* !UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/dist/src/mips/Ginit_remote.c b/src/third_party/unwind/dist/src/mips/Ginit_remote.c
new file mode 100644
index 00000000000..9b8ba5b89de
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/Ginit_remote.c
@@ -0,0 +1,45 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "init.h"
+#include "unwind_i.h"
+
+int
+unw_init_remote (unw_cursor_t *cursor, unw_addr_space_t as, void *as_arg)
+{
+#ifdef UNW_LOCAL_ONLY
+  return -UNW_EINVAL;
+#else /* !UNW_LOCAL_ONLY */
+  struct cursor *c = (struct cursor *) cursor;
+
+  if (!tdep_init_done)
+    tdep_init ();
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  c->dwarf.as = as;
+  c->dwarf.as_arg = as_arg;
+  return common_init (c, 0);
+#endif /* !UNW_LOCAL_ONLY */
+}
diff --git a/src/third_party/unwind/dist/src/mips/Gis_signal_frame.c b/src/third_party/unwind/dist/src/mips/Gis_signal_frame.c
new file mode 100644
index 00000000000..c0e3b98368b
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/Gis_signal_frame.c
@@ -0,0 +1,78 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2015 Imagination Technologies Limited
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include <stdio.h>
+
+int
+unw_is_signal_frame (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  unw_word_t w0, w1, ip;
+  unw_addr_space_t as;
+  unw_accessors_t *a;
+  void *arg;
+  int ret;
+
+  as = c->dwarf.as;
+  a = unw_get_accessors_int (as);
+  arg = c->dwarf.as_arg;
+
+  ip = c->dwarf.ip;
+
+  /* syscall */
+  if ((ret = (*a->access_mem) (as, ip + 4, &w1, 0, arg)) < 0)
+    return 0;
+  if ((w1 & 0xffffffff) != 0x0c)
+    return 0;
+
+  /* li v0, 0x1061 (rt) or li v0, 0x1017 */
+  if ((ret = (*a->access_mem) (as, ip, &w0, 0, arg)) < 0)
+    return 0;
+
+  switch (c->dwarf.as->abi)
+    {
+    case UNW_MIPS_ABI_O32:
+      switch (w0 & 0xffffffff)
+        {
+        case 0x24021061:
+          return 1;
+        case 0x24021017:
+          return 2;
+        default:
+          return 0;
+        }
+    case UNW_MIPS_ABI_N64:
+      switch (w0 & 0xffffffff)
+        {
+        case 0x2402145b:
+          return 1;
+        default:
+          return 0;
+        }
+    default:
+      return 0;
+    }
+}
diff --git a/src/third_party/unwind/dist/src/mips/Greg_states_iterate.c b/src/third_party/unwind/dist/src/mips/Greg_states_iterate.c
new file mode 100644
index 00000000000..a17dc1b561d
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/Greg_states_iterate.c
@@ -0,0 +1,37 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_reg_states_iterate (unw_cursor_t *cursor,
+			unw_reg_states_callback cb, void *token)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  return dwarf_reg_states_iterate (&c->dwarf, cb, token);
+}
diff --git a/src/third_party/unwind/dist/src/mips/Gregs.c b/src/third_party/unwind/dist/src/mips/Gregs.c
new file mode 100644
index 00000000000..e967324d67d
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/Gregs.c
@@ -0,0 +1,106 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+/* FIXME: The following is probably unfinished and/or at least partly bogus.  */
+
+HIDDEN int
+tdep_access_reg (struct cursor *c, unw_regnum_t reg, unw_word_t *valp,
+                 int write)
+{
+  dwarf_loc_t loc = DWARF_NULL_LOC;
+  
+  switch (reg)
+    {
+    case UNW_MIPS_R0:
+    case UNW_MIPS_R1:
+    case UNW_MIPS_R2:
+    case UNW_MIPS_R3:
+    case UNW_MIPS_R4:
+    case UNW_MIPS_R5:
+    case UNW_MIPS_R6:
+    case UNW_MIPS_R7:
+    case UNW_MIPS_R8:
+    case UNW_MIPS_R9:
+    case UNW_MIPS_R10:
+    case UNW_MIPS_R11:
+    case UNW_MIPS_R12:
+    case UNW_MIPS_R13:
+    case UNW_MIPS_R14:
+    case UNW_MIPS_R15:
+    case UNW_MIPS_R16:
+    case UNW_MIPS_R17:
+    case UNW_MIPS_R18:
+    case UNW_MIPS_R19:
+    case UNW_MIPS_R20:
+    case UNW_MIPS_R21:
+    case UNW_MIPS_R22:
+    case UNW_MIPS_R23:
+    case UNW_MIPS_R24:
+    case UNW_MIPS_R25:
+    case UNW_MIPS_R26:
+    case UNW_MIPS_R27:
+    case UNW_MIPS_R28:
+
+    case UNW_MIPS_R30:
+    case UNW_MIPS_R31:
+      loc = c->dwarf.loc[reg - UNW_MIPS_R0];
+      break;
+
+    case UNW_MIPS_PC:
+      if (write)
+	c->dwarf.ip = *valp;            /* update the IP cache */
+      loc = c->dwarf.loc[reg];
+      break;
+
+    case UNW_MIPS_R29:
+    case UNW_MIPS_CFA:
+      if (write)
+        return -UNW_EREADONLYREG;
+      *valp = c->dwarf.cfa;
+      return 0;
+
+    /* FIXME: IP?  Copro & shadow registers?  */
+
+    default:
+      Debug (1, "bad register number %u\n", reg);
+      return -UNW_EBADREG;
+    }
+
+  if (write)
+    return dwarf_put (&c->dwarf, loc, *valp);
+  else
+    return dwarf_get (&c->dwarf, loc, valp);
+}
+
+/* FIXME for MIPS.  */
+
+HIDDEN int
+tdep_access_fpreg (struct cursor *c, unw_regnum_t reg, unw_fpreg_t *valp,
+                   int write)
+{
+  Debug (1, "bad register number %u\n", reg);
+  return -UNW_EBADREG;
+}
diff --git a/src/third_party/unwind/dist/src/mips/Gresume.c b/src/third_party/unwind/dist/src/mips/Gresume.c
new file mode 100644
index 00000000000..cb70abc8c5c
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/Gresume.c
@@ -0,0 +1,45 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* FIXME for MIPS.  */
+
+#include <stdlib.h>
+
+#include "unwind_i.h"
+
+#ifndef UNW_REMOTE_ONLY
+
+HIDDEN inline int
+mips_local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg)
+{
+  return -UNW_EINVAL;
+}
+
+#endif /* !UNW_REMOTE_ONLY */
+
+int
+unw_resume (unw_cursor_t *cursor)
+{
+  return -UNW_EINVAL;
+}
diff --git a/src/third_party/unwind/dist/src/mips/Gstep.c b/src/third_party/unwind/dist/src/mips/Gstep.c
new file mode 100644
index 00000000000..f5a742e12e0
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/Gstep.c
@@ -0,0 +1,218 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2015 Imagination Technologies Limited
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "offsets.h"
+
+static int
+mips_handle_signal_frame (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  unw_word_t sc_addr, sp_addr = c->dwarf.cfa;
+  unw_word_t ra, fp;
+  int ret;
+
+  switch (unw_is_signal_frame (cursor)) {
+  case 1:
+    sc_addr = sp_addr + LINUX_SF_TRAMP_SIZE + sizeof (siginfo_t) +
+              LINUX_UC_MCONTEXT_OFF;
+    break;
+  case 2:
+    sc_addr = sp_addr + LINUX_UC_MCONTEXT_OFF;
+    break;
+  default:
+    return -UNW_EUNSPEC;
+  }
+
+  if (tdep_big_endian(c->dwarf.as))
+    sc_addr += 4;
+
+  c->sigcontext_addr = sc_addr;
+
+  /* Update the dwarf cursor. */
+  c->dwarf.loc[UNW_MIPS_R0]  = DWARF_LOC (sc_addr + LINUX_SC_R0_OFF, 0);
+  c->dwarf.loc[UNW_MIPS_R1]  = DWARF_LOC (sc_addr + LINUX_SC_R1_OFF, 0);
+  c->dwarf.loc[UNW_MIPS_R2]  = DWARF_LOC (sc_addr + LINUX_SC_R2_OFF, 0);
+  c->dwarf.loc[UNW_MIPS_R3]  = DWARF_LOC (sc_addr + LINUX_SC_R3_OFF, 0);
+  c->dwarf.loc[UNW_MIPS_R4]  = DWARF_LOC (sc_addr + LINUX_SC_R4_OFF, 0);
+  c->dwarf.loc[UNW_MIPS_R5]  = DWARF_LOC (sc_addr + LINUX_SC_R5_OFF, 0);
+  c->dwarf.loc[UNW_MIPS_R6]  = DWARF_LOC (sc_addr + LINUX_SC_R6_OFF, 0);
+  c->dwarf.loc[UNW_MIPS_R7]  = DWARF_LOC (sc_addr + LINUX_SC_R7_OFF, 0);
+  c->dwarf.loc[UNW_MIPS_R8]  = DWARF_LOC (sc_addr + LINUX_SC_R8_OFF, 0);
+  c->dwarf.loc[UNW_MIPS_R9]  = DWARF_LOC (sc_addr + LINUX_SC_R9_OFF, 0);
+  c->dwarf.loc[UNW_MIPS_R10] = DWARF_LOC (sc_addr + LINUX_SC_R10_OFF, 0);
+  c->dwarf.loc[UNW_MIPS_R11] = DWARF_LOC (sc_addr + LINUX_SC_R11_OFF, 0);
+  c->dwarf.loc[UNW_MIPS_R12] = DWARF_LOC (sc_addr + LINUX_SC_R12_OFF, 0);
+  c->dwarf.loc[UNW_MIPS_R13] = DWARF_LOC (sc_addr + LINUX_SC_R13_OFF, 0);
+  c->dwarf.loc[UNW_MIPS_R14] = DWARF_LOC (sc_addr + LINUX_SC_R14_OFF, 0);
+  c->dwarf.loc[UNW_MIPS_R15] = DWARF_LOC (sc_addr + LINUX_SC_R15_OFF, 0);
+  c->dwarf.loc[UNW_MIPS_R16] = DWARF_LOC (sc_addr + LINUX_SC_R16_OFF, 0);
+  c->dwarf.loc[UNW_MIPS_R17] = DWARF_LOC (sc_addr + LINUX_SC_R17_OFF, 0);
+  c->dwarf.loc[UNW_MIPS_R18] = DWARF_LOC (sc_addr + LINUX_SC_R18_OFF, 0);
+  c->dwarf.loc[UNW_MIPS_R19] = DWARF_LOC (sc_addr + LINUX_SC_R19_OFF, 0);
+  c->dwarf.loc[UNW_MIPS_R20] = DWARF_LOC (sc_addr + LINUX_SC_R20_OFF, 0);
+  c->dwarf.loc[UNW_MIPS_R21] = DWARF_LOC (sc_addr + LINUX_SC_R21_OFF, 0);
+  c->dwarf.loc[UNW_MIPS_R22] = DWARF_LOC (sc_addr + LINUX_SC_R22_OFF, 0);
+  c->dwarf.loc[UNW_MIPS_R23] = DWARF_LOC (sc_addr + LINUX_SC_R23_OFF, 0);
+  c->dwarf.loc[UNW_MIPS_R24] = DWARF_LOC (sc_addr + LINUX_SC_R24_OFF, 0);
+  c->dwarf.loc[UNW_MIPS_R25] = DWARF_LOC (sc_addr + LINUX_SC_R25_OFF, 0);
+  c->dwarf.loc[UNW_MIPS_R26] = DWARF_LOC (sc_addr + LINUX_SC_R26_OFF, 0);
+  c->dwarf.loc[UNW_MIPS_R27] = DWARF_LOC (sc_addr + LINUX_SC_R27_OFF, 0);
+  c->dwarf.loc[UNW_MIPS_R28] = DWARF_LOC (sc_addr + LINUX_SC_R28_OFF, 0);
+  c->dwarf.loc[UNW_MIPS_R29] = DWARF_LOC (sc_addr + LINUX_SC_R29_OFF, 0);
+  c->dwarf.loc[UNW_MIPS_R30] = DWARF_LOC (sc_addr + LINUX_SC_R30_OFF, 0);
+  c->dwarf.loc[UNW_MIPS_R31] = DWARF_LOC (sc_addr + LINUX_SC_R31_OFF, 0);
+  c->dwarf.loc[UNW_MIPS_PC] = DWARF_LOC (sc_addr + LINUX_SC_PC_OFF, 0);
+
+  /* Set SP/CFA and PC/IP. */
+  dwarf_get (&c->dwarf, c->dwarf.loc[UNW_MIPS_R29], &c->dwarf.cfa);
+
+  if ((ret = dwarf_get(&c->dwarf, DWARF_LOC(sc_addr + LINUX_SC_PC_OFF, 0),
+                       &c->dwarf.ip)) < 0)
+    return ret;
+
+  if ((ret = dwarf_get(&c->dwarf, DWARF_LOC(sc_addr + LINUX_SC_R31_OFF, 0),
+                       &ra)) < 0)
+    return ret;
+  if ((ret = dwarf_get(&c->dwarf, DWARF_LOC(sc_addr + LINUX_SC_R30_OFF, 0),
+                       &fp)) < 0)
+    return ret;
+
+  Debug (2, "SH (ip=0x%016llx, ra=0x%016llx, sp=0x%016llx, fp=0x%016llx)\n",
+         (unsigned long long)c->dwarf.ip, (unsigned long long)ra,
+         (unsigned long long)c->dwarf.cfa, (unsigned long long)fp);
+
+  c->dwarf.pi_valid = 0;
+  c->dwarf.use_prev_instr = 0;
+
+  return 1;
+}
+
+
+int _step_n64(struct cursor *c)
+{
+  //TODO:handle plt entry
+  struct dwarf_loc fp_loc, pc_loc;
+  int ret;
+  unw_word_t fp = 0;
+  unw_word_t ra = 0;
+
+  ret = dwarf_get (&c->dwarf, c->dwarf.loc[UNW_MIPS_R30], &fp);
+  if (ret < 0)
+    {
+      Debug (2, "returning %d [FP=0x%lx]\n", ret,
+             DWARF_GET_LOC (c->dwarf.loc[UNW_MIPS_R30]));
+      return ret;
+    }
+  ret = dwarf_get (&c->dwarf, c->dwarf.loc[UNW_MIPS_R31], &ra);
+  if (ret < 0)
+    {
+      Debug (2, "returning %d [RA=0x%lx]\n", ret,
+             DWARF_GET_LOC (c->dwarf.loc[UNW_MIPS_R31]));
+      return ret;
+    }
+
+  if (!fp) {
+    fp_loc = DWARF_NULL_LOC;
+    pc_loc = DWARF_NULL_LOC;
+  } else {
+    fp_loc = DWARF_LOC(fp+16, 0);
+    pc_loc = DWARF_LOC (fp+24, 0);
+#if UNW_DEBUG
+    unw_word_t fp1 = 0;
+    ret = dwarf_get (&c->dwarf, fp_loc, &fp1);
+    Debug (1, "RET:%d [FP=0x%lx] = 0x%lx (cfa = 0x%lx) -> 0x%lx. SAVED PC:0x%lx\n",
+           ret,
+           (unsigned long) DWARF_GET_LOC (c->dwarf.loc[UNW_MIPS_R30]),
+           fp, c->dwarf.cfa, fp1, ra);
+#endif
+    /* Heuristic to determine incorrect guess.  For FP to be a
+       valid frame it needs to be above current CFA, but don't
+       let it go more than a little.  Note that we can't deduce
+       anything about new FP (fp1) since it may not be a frame
+       pointer in the frame above.  Just check we get the value. */
+    if (ret < 0
+        || fp < c->dwarf.cfa
+        || (fp - c->dwarf.cfa) > 0x4000)
+      {
+        pc_loc = DWARF_NULL_LOC;
+        fp_loc = DWARF_NULL_LOC;
+      }
+  }
+
+  c->dwarf.loc[UNW_MIPS_R30] = fp_loc;
+
+  c->dwarf.loc[UNW_MIPS_PC] = c->dwarf.loc[UNW_MIPS_R31];
+  c->dwarf.loc[UNW_MIPS_R31] = pc_loc;
+  c->dwarf.use_prev_instr = 1;
+
+  if (DWARF_IS_NULL_LOC (c->dwarf.loc[UNW_MIPS_R30]))
+    {
+      ret = 0;
+      Debug (2, "NULL %%fp loc, returning %d\n", ret);
+      return ret;
+    }
+
+  if (!DWARF_IS_NULL_LOC (c->dwarf.loc[UNW_MIPS_PC]))
+    {
+      ret = dwarf_get (&c->dwarf, c->dwarf.loc[UNW_MIPS_PC], &c->dwarf.ip);
+      Debug (1, "Frame Chain [IP=0x%Lx] = 0x%Lx\n",
+             (unsigned long long) DWARF_GET_LOC (c->dwarf.loc[UNW_MIPS_PC]),
+             (unsigned long long) c->dwarf.ip);
+      if (ret < 0)
+        {
+          Debug (2, "returning %d\n", ret);
+          return ret;
+        }
+      ret = 1;
+    }
+  else {
+    c->dwarf.ip = 0;
+  }
+  return (c->dwarf.ip == 0) ? 0 : 1;
+}
+
+int
+unw_step (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  int ret;
+
+  ret = mips_handle_signal_frame (cursor);
+  if (ret < 0)
+    /* Not a signal frame, try DWARF-based unwinding. */
+    ret = dwarf_step (&c->dwarf);
+
+  if (unlikely (ret == -UNW_ESTOPUNWIND))
+    return ret;
+
+#if _MIPS_SIM == _ABI64
+  if (unlikely (ret < 0))
+    {
+      return _step_n64(c);
+    }
+#endif
+  return (c->dwarf.ip == 0) ? 0 : 1;
+}
diff --git a/src/third_party/unwind/dist/src/mips/Lapply_reg_state.c b/src/third_party/unwind/dist/src/mips/Lapply_reg_state.c
new file mode 100644
index 00000000000..7ebada480e5
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/Lapply_reg_state.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gapply_reg_state.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/mips/Lcreate_addr_space.c b/src/third_party/unwind/dist/src/mips/Lcreate_addr_space.c
new file mode 100644
index 00000000000..0f2dc6be901
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/Lcreate_addr_space.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gcreate_addr_space.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/mips/Lget_proc_info.c b/src/third_party/unwind/dist/src/mips/Lget_proc_info.c
new file mode 100644
index 00000000000..69028b019fc
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/Lget_proc_info.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gget_proc_info.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/mips/Lget_save_loc.c b/src/third_party/unwind/dist/src/mips/Lget_save_loc.c
new file mode 100644
index 00000000000..9ea048a9076
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/Lget_save_loc.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gget_save_loc.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/mips/Lglobal.c b/src/third_party/unwind/dist/src/mips/Lglobal.c
new file mode 100644
index 00000000000..6d7b489e14b
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/Lglobal.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gglobal.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/mips/Linit.c b/src/third_party/unwind/dist/src/mips/Linit.c
new file mode 100644
index 00000000000..e9abfdd46a3
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/Linit.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/mips/Linit_local.c b/src/third_party/unwind/dist/src/mips/Linit_local.c
new file mode 100644
index 00000000000..68a1687e854
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/Linit_local.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit_local.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/mips/Linit_remote.c b/src/third_party/unwind/dist/src/mips/Linit_remote.c
new file mode 100644
index 00000000000..58cb04ab7cd
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/Linit_remote.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit_remote.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/mips/Lis_signal_frame.c b/src/third_party/unwind/dist/src/mips/Lis_signal_frame.c
new file mode 100644
index 00000000000..b9a7c4f51ad
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/Lis_signal_frame.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gis_signal_frame.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/mips/Lreg_states_iterate.c b/src/third_party/unwind/dist/src/mips/Lreg_states_iterate.c
new file mode 100644
index 00000000000..f1eb1e79dcd
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/Lreg_states_iterate.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Greg_states_iterate.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/mips/Lregs.c b/src/third_party/unwind/dist/src/mips/Lregs.c
new file mode 100644
index 00000000000..2c9c75cd7d9
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/Lregs.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gregs.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/mips/Lresume.c b/src/third_party/unwind/dist/src/mips/Lresume.c
new file mode 100644
index 00000000000..41a8cf003de
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/Lresume.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gresume.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/mips/Lstep.c b/src/third_party/unwind/dist/src/mips/Lstep.c
new file mode 100644
index 00000000000..c1ac3c7547f
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/Lstep.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gstep.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/mips/getcontext.S b/src/third_party/unwind/dist/src/mips/getcontext.S
new file mode 100644
index 00000000000..d1dbd57932d
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/getcontext.S
@@ -0,0 +1,93 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "offsets.h"
+#include <endian.h>
+
+	.text
+
+#if _MIPS_SIM == _ABIO32
+# if __BYTE_ORDER == __BIG_ENDIAN
+#  define OFFSET 4
+# else
+#  define OFFSET 0
+# endif
+# define SREG(X) \
+ sw $X, (LINUX_UC_MCONTEXT_GREGS + 8 * X + OFFSET) ($4); \
+ sra $1, $X, 31; \
+ sw $1, (LINUX_UC_MCONTEXT_GREGS + 8 * X + 4 - OFFSET) ($4)
+/* Yes, we save the return address to PC. */
+# define SPC \
+ sw $31, (LINUX_UC_MCONTEXT_PC + OFFSET) ($4); \
+ sra $1, $31, 31; \
+ sw $1, (LINUX_UC_MCONTEXT_PC + 4 - OFFSET) ($4)
+#else
+# define SREG(X) sd $X, (LINUX_UC_MCONTEXT_GREGS + 8 * X) ($4)
+# define SPC sd $31, (LINUX_UC_MCONTEXT_PC) ($4)
+#endif
+
+	.global _Umips_getcontext
+	.type	_Umips_getcontext, %function
+	# This is a stub version of getcontext() for MIPS which only stores core
+	# registers.
+_Umips_getcontext:
+	.set noat
+	SREG (1)
+	SREG (0)
+	SREG (2)
+	SREG (3)
+	SREG (4)
+	SREG (5)
+	SREG (6)
+	SREG (7)
+	SREG (8)
+	SREG (9)
+	SREG (10)
+	SREG (11)
+	SREG (12)
+	SREG (13)
+	SREG (14)
+	SREG (15)
+	SREG (16)
+	SREG (17)
+	SREG (18)
+	SREG (19)
+	SREG (20)
+	SREG (21)
+	SREG (22)
+	SREG (23)
+	SREG (24)
+	SREG (25)
+	SREG (26)
+	SREG (27)
+	SREG (28)
+	SREG (29)
+	SREG (30)
+	SREG (31)
+	SPC
+	li	$2, 0
+	j $31
+
+	.size	_Umips_getcontext, .-_Umips_getcontext
diff --git a/src/third_party/unwind/dist/src/mips/init.h b/src/third_party/unwind/dist/src/mips/init.h
new file mode 100644
index 00000000000..30c193a18f7
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/init.h
@@ -0,0 +1,59 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+static inline int
+common_init (struct cursor *c, unsigned use_prev_instr)
+{
+  int ret, i;
+
+  for (i = 0; i < 32; i++)
+    c->dwarf.loc[i] = DWARF_REG_LOC (&c->dwarf, UNW_MIPS_R0 + i);
+  for (i = 32; i < DWARF_NUM_PRESERVED_REGS; ++i)
+    c->dwarf.loc[i] = DWARF_NULL_LOC;
+
+  c->dwarf.loc[UNW_MIPS_PC] = DWARF_REG_LOC (&c->dwarf, UNW_MIPS_PC);
+
+  ret = dwarf_get (&c->dwarf, c->dwarf.loc[UNW_MIPS_PC], &c->dwarf.ip);
+  if (ret < 0)
+    return ret;
+
+  ret = dwarf_get (&c->dwarf, DWARF_REG_LOC (&c->dwarf, UNW_MIPS_R29),
+                   &c->dwarf.cfa);
+  if (ret < 0)
+    return ret;
+
+  /* FIXME: Initialisation for other registers.  */
+
+  c->dwarf.args_size = 0;
+  c->dwarf.stash_frames = 0;
+  c->dwarf.use_prev_instr = use_prev_instr;
+  c->dwarf.pi_valid = 0;
+  c->dwarf.pi_is_dynamic = 0;
+  c->dwarf.hint = 0;
+  c->dwarf.prev_rs = 0;
+
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/mips/is_fpreg.c b/src/third_party/unwind/dist/src/mips/is_fpreg.c
new file mode 100644
index 00000000000..a92dd5ece7a
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/is_fpreg.c
@@ -0,0 +1,35 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "libunwind_i.h"
+
+/* FIXME: I'm not sure if libunwind's GP/FP register distinction is very useful
+   on MIPS.  */
+
+int
+unw_is_fpreg (int regnum)
+{
+  /* FIXME: Support FP.  */
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/mips/offsets.h b/src/third_party/unwind/dist/src/mips/offsets.h
new file mode 100644
index 00000000000..b5060513677
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/offsets.h
@@ -0,0 +1,86 @@
+/* Linux-specific definitions: */
+
+/* Define various structure offsets to simplify cross-compilation.  */
+
+/* FIXME: Currently these are only used in getcontext.S, which is only used
+   for a local unwinder, so we can use the compile-time ABI.  At a later date
+   we will want all three here, to use for signal handlers.  Also, because
+   of the three ABIs, gen-offsets.c can not quite generate this file.  */
+
+/* Offsets for MIPS Linux "ucontext_t":  */
+
+/* First 24 bytes in sigframe are argument save space and padding for
+what used to be signal trampolines. Ref: arch/mips/kernel/signal.c */
+#define LINUX_SF_TRAMP_SIZE 0x18
+
+#if _MIPS_SIM == _ABIO32
+
+# define LINUX_UC_FLAGS_OFF     0x0
+# define LINUX_UC_LINK_OFF      0x4
+# define LINUX_UC_STACK_OFF     0x8
+# define LINUX_UC_MCONTEXT_OFF  0x18
+# define LINUX_UC_SIGMASK_OFF   0x268
+# define LINUX_UC_MCONTEXT_PC   0x20
+# define LINUX_UC_MCONTEXT_GREGS        0x28
+
+#elif _MIPS_SIM == _ABIN32
+
+# define LINUX_UC_FLAGS_OFF     0x0
+# define LINUX_UC_LINK_OFF      0x4
+# define LINUX_UC_STACK_OFF     0x8
+# define LINUX_UC_MCONTEXT_OFF  0x18
+# define LINUX_UC_SIGMASK_OFF   0x270
+# define LINUX_UC_MCONTEXT_PC   0x258
+# define LINUX_UC_MCONTEXT_GREGS        0x18
+
+#elif _MIPS_SIM == _ABI64
+
+# define LINUX_UC_FLAGS_OFF     0x0
+# define LINUX_UC_LINK_OFF      0x8
+# define LINUX_UC_STACK_OFF     0x10
+# define LINUX_UC_MCONTEXT_OFF  0x28
+# define LINUX_UC_SIGMASK_OFF   0x280
+# define LINUX_UC_MCONTEXT_PC   0x268
+# define LINUX_UC_MCONTEXT_GREGS        0x28
+
+#else
+
+#error Unsupported ABI
+
+#endif
+
+#define LINUX_SC_R0_OFF   (LINUX_UC_MCONTEXT_GREGS - LINUX_UC_MCONTEXT_OFF)
+#define LINUX_SC_R1_OFF   (LINUX_SC_R0_OFF + 1*8)
+#define LINUX_SC_R2_OFF   (LINUX_SC_R0_OFF + 2*8)
+#define LINUX_SC_R3_OFF   (LINUX_SC_R0_OFF + 3*8)
+#define LINUX_SC_R4_OFF   (LINUX_SC_R0_OFF + 4*8)
+#define LINUX_SC_R5_OFF   (LINUX_SC_R0_OFF + 5*8)
+#define LINUX_SC_R6_OFF   (LINUX_SC_R0_OFF + 6*8)
+#define LINUX_SC_R7_OFF   (LINUX_SC_R0_OFF + 7*8)
+#define LINUX_SC_R8_OFF   (LINUX_SC_R0_OFF + 8*8)
+#define LINUX_SC_R9_OFF   (LINUX_SC_R0_OFF + 9*8)
+#define LINUX_SC_R10_OFF  (LINUX_SC_R0_OFF + 10*8)
+#define LINUX_SC_R11_OFF  (LINUX_SC_R0_OFF + 11*8)
+#define LINUX_SC_R12_OFF  (LINUX_SC_R0_OFF + 12*8)
+#define LINUX_SC_R13_OFF  (LINUX_SC_R0_OFF + 13*8)
+#define LINUX_SC_R14_OFF  (LINUX_SC_R0_OFF + 14*8)
+#define LINUX_SC_R15_OFF  (LINUX_SC_R0_OFF + 15*8)
+#define LINUX_SC_R16_OFF  (LINUX_SC_R0_OFF + 16*8)
+#define LINUX_SC_R17_OFF  (LINUX_SC_R0_OFF + 17*8)
+#define LINUX_SC_R18_OFF  (LINUX_SC_R0_OFF + 18*8)
+#define LINUX_SC_R19_OFF  (LINUX_SC_R0_OFF + 19*8)
+#define LINUX_SC_R20_OFF  (LINUX_SC_R0_OFF + 20*8)
+#define LINUX_SC_R21_OFF  (LINUX_SC_R0_OFF + 21*8)
+#define LINUX_SC_R22_OFF  (LINUX_SC_R0_OFF + 22*8)
+#define LINUX_SC_R23_OFF  (LINUX_SC_R0_OFF + 23*8)
+#define LINUX_SC_R24_OFF  (LINUX_SC_R0_OFF + 24*8)
+#define LINUX_SC_R25_OFF  (LINUX_SC_R0_OFF + 25*8)
+#define LINUX_SC_R26_OFF  (LINUX_SC_R0_OFF + 26*8)
+#define LINUX_SC_R27_OFF  (LINUX_SC_R0_OFF + 27*8)
+#define LINUX_SC_R28_OFF  (LINUX_SC_R0_OFF + 28*8)
+#define LINUX_SC_R29_OFF  (LINUX_SC_R0_OFF + 29*8)
+#define LINUX_SC_R30_OFF  (LINUX_SC_R0_OFF + 30*8)
+#define LINUX_SC_R31_OFF  (LINUX_SC_R0_OFF + 31*8)
+
+#define LINUX_SC_SP_OFF   LINUX_SC_R29_OFF
+#define LINUX_SC_PC_OFF   (LINUX_UC_MCONTEXT_PC - LINUX_UC_MCONTEXT_OFF)
diff --git a/src/third_party/unwind/dist/src/mips/regname.c b/src/third_party/unwind/dist/src/mips/regname.c
new file mode 100644
index 00000000000..b137b972b61
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/regname.c
@@ -0,0 +1,48 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+static const char *regname[] =
+  {
+    /* 0.  */
+    "$0",  "$1",  "$2",  "$3",  "$4",  "$5",  "$6",  "$7",
+    /* 8.  */
+    "$8",  "$9",  "$10", "$11",  "$12",  "$13",  "$14",  "$15",
+    /* 16.  */
+    "$16",  "$17",  "$18", "$19",  "$20",  "$21",  "$22",  "$23",
+    /* 24.  */
+    "$24",  "$25",  "$26", "$27",  "$28",  "$29",  "$30",  "$31",
+  };
+
+const char *
+unw_regname (unw_regnum_t reg)
+{
+  if (reg < (unw_regnum_t) ARRAY_SIZE (regname))
+    return regname[reg];
+  else if (reg == UNW_MIPS_PC)
+    return "pc";
+  else
+    return "???";
+}
diff --git a/src/third_party/unwind/dist/src/mips/siglongjmp.S b/src/third_party/unwind/dist/src/mips/siglongjmp.S
new file mode 100644
index 00000000000..9cbcf3dc014
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/siglongjmp.S
@@ -0,0 +1,8 @@
+	/* Dummy implementation for now.  */
+
+	.globl _UI_siglongjmp_cont
+	.globl _UI_longjmp_cont
+
+_UI_siglongjmp_cont:
+_UI_longjmp_cont:
+	j	$31
diff --git a/src/third_party/unwind/dist/src/mips/unwind_i.h b/src/third_party/unwind/dist/src/mips/unwind_i.h
new file mode 100644
index 00000000000..3382dcfe58c
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/unwind_i.h
@@ -0,0 +1,43 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef unwind_i_h
+#define unwind_i_h
+
+#include <stdint.h>
+
+#include <libunwind-mips.h>
+
+#include "libunwind_i.h"
+
+#define mips_lock                       UNW_OBJ(lock)
+#define mips_local_resume               UNW_OBJ(local_resume)
+#define mips_local_addr_space_init      UNW_OBJ(local_addr_space_init)
+
+extern int mips_local_resume (unw_addr_space_t as, unw_cursor_t *cursor,
+                             void *arg);
+
+extern void mips_local_addr_space_init (void);
+
+#endif /* unwind_i_h */
diff --git a/src/third_party/unwind/dist/src/os-freebsd.c b/src/third_party/unwind/dist/src/os-freebsd.c
new file mode 100644
index 00000000000..753e819dfe4
--- /dev/null
+++ b/src/third_party/unwind/dist/src/os-freebsd.c
@@ -0,0 +1,166 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2010 Konstantin Belousov <kib@freebsd.org>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <sys/param.h>
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <sys/sysctl.h>
+#include <sys/user.h>
+#include <stdio.h>
+#include <errno.h>
+
+#include "libunwind_i.h"
+
+static void *
+get_mem(size_t sz)
+{
+  void *res;
+
+  res = mmap(NULL, sz, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
+  if (res == MAP_FAILED)
+    return (NULL);
+  return (res);
+}
+
+static void
+free_mem(void *ptr, size_t sz)
+{
+  munmap(ptr, sz);
+}
+
+static int
+get_pid_by_tid(int tid)
+{
+  int mib[3], error;
+  size_t len, len1;
+  char *buf;
+  struct kinfo_proc *kv;
+  unsigned i, pid;
+
+  len = 0;
+  mib[0] = CTL_KERN;
+  mib[1] = KERN_PROC;
+  mib[2] = KERN_PROC_ALL;
+
+  error = sysctl(mib, 3, NULL, &len, NULL, 0);
+  if (error == -1)
+    return (-1);
+  len1 = len * 4 / 3;
+  buf = get_mem(len1);
+  if (buf == NULL)
+    return (-1);
+  len = len1;
+  error = sysctl(mib, 3, buf, &len, NULL, 0);
+  if (error == -1) {
+    free_mem(buf, len1);
+    return (-1);
+  }
+  pid = -1;
+  for (i = 0, kv = (struct kinfo_proc *)buf; i < len / sizeof(*kv);
+   i++, kv++) {
+    if (kv->ki_tid == tid) {
+      pid = kv->ki_pid;
+      break;
+    }
+  }
+  free_mem(buf, len1);
+  return (pid);
+}
+
+int
+tdep_get_elf_image (struct elf_image *ei, pid_t pid, unw_word_t ip,
+                    unsigned long *segbase, unsigned long *mapoff, char *path, size_t pathlen)
+{
+  int mib[4], error, ret;
+  size_t len, len1;
+  char *buf, *bp, *eb;
+  struct kinfo_vmentry *kv;
+
+  len = 0;
+  mib[0] = CTL_KERN;
+  mib[1] = KERN_PROC;
+  mib[2] = KERN_PROC_VMMAP;
+  mib[3] = pid;
+
+  error = sysctl(mib, 4, NULL, &len, NULL, 0);
+  if (error == -1) {
+    if (errno == ESRCH) {
+      mib[3] = get_pid_by_tid(pid);
+      if (mib[3] != -1)
+        error = sysctl(mib, 4, NULL, &len, NULL, 0);
+      if (error == -1)
+        return (-UNW_EUNSPEC);
+    } else
+      return (-UNW_EUNSPEC);
+  }
+  len1 = len * 4 / 3;
+  buf = get_mem(len1);
+  if (buf == NULL)
+    return (-UNW_EUNSPEC);
+  len = len1;
+  error = sysctl(mib, 4, buf, &len, NULL, 0);
+  if (error == -1) {
+    free_mem(buf, len1);
+    return (-UNW_EUNSPEC);
+  }
+  ret = -UNW_EUNSPEC;
+  for (bp = buf, eb = buf + len; bp < eb; bp += kv->kve_structsize) {
+     kv = (struct kinfo_vmentry *)(uintptr_t)bp;
+     if (ip < kv->kve_start || ip >= kv->kve_end)
+       continue;
+     if (kv->kve_type != KVME_TYPE_VNODE)
+       continue;
+     *segbase = kv->kve_start;
+     *mapoff = kv->kve_offset;
+     if (path)
+       {
+         strncpy(path, kv->kve_path, pathlen);
+       }
+     ret = elf_map_image (ei, kv->kve_path);
+     break;
+  }
+  free_mem(buf, len1);
+  return (ret);
+}
+
+#ifndef UNW_REMOTE_ONLY
+
+void
+tdep_get_exe_image_path (char *path)
+{
+  int mib[4], error;
+  size_t len;
+
+  len = 0;
+  mib[0] = CTL_KERN;
+  mib[1] = KERN_PROC;
+  mib[2] = KERN_PROC_PATHNAME;
+  mib[3] = getpid();
+
+  error = sysctl(mib, 4, path, &len, NULL, 0);
+  if (error == -1)
+	  path[0] = 0;
+}
+
+#endif
diff --git a/src/third_party/unwind/dist/src/os-hpux.c b/src/third_party/unwind/dist/src/os-hpux.c
new file mode 100644
index 00000000000..48bfb05cf54
--- /dev/null
+++ b/src/third_party/unwind/dist/src/os-hpux.c
@@ -0,0 +1,78 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <dlfcn.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "libunwind_i.h"
+
+#include "elf64.h"
+
+HIDDEN int
+tdep_get_elf_image (struct elf_image *ei, pid_t pid, unw_word_t ip,
+                    unsigned long *segbase, unsigned long *mapoff,
+                    char *path, size_t pathlen)
+{
+  struct load_module_desc lmd;
+  const char *path2;
+
+  if (pid != getpid ())
+    {
+      printf ("%s: remote case not implemented yet\n", __FUNCTION__);
+      return -UNW_ENOINFO;
+    }
+
+  if (!dlmodinfo (ip, &lmd, sizeof (lmd), NULL, 0, 0))
+    return -UNW_ENOINFO;
+
+  *segbase = lmd.text_base;
+  *mapoff = 0;                  /* XXX fix me? */
+
+  path2 = dlgetname (&lmd, sizeof (lmd), NULL, 0, 0);
+  if (!path2)
+    return -UNW_ENOINFO;
+  if (path)
+    {
+      strncpy(path, path2, pathlen);
+      path[pathlen - 1] = '\0';
+      if (strcmp(path, path2) != 0)
+        Debug(1, "buffer size (%d) not big enough to hold path\n", pathlen);
+    }
+  Debug(1, "segbase=%lx, mapoff=%lx, path=%s\n", *segbase, *mapoff, path);
+
+  return elf_map_image (ei, path);
+}
+
+#ifndef UNW_REMOTE_ONLY
+
+void
+tdep_get_exe_image_path (char *path)
+{
+  path[0] = 0; /* XXX */
+}
+
+#endif
+
diff --git a/src/third_party/unwind/dist/src/os-linux.c b/src/third_party/unwind/dist/src/os-linux.c
new file mode 100644
index 00000000000..8a00669fb3c
--- /dev/null
+++ b/src/third_party/unwind/dist/src/os-linux.c
@@ -0,0 +1,73 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <limits.h>
+#include <stdio.h>
+
+#include "libunwind_i.h"
+#include "os-linux.h"
+
+int
+tdep_get_elf_image (struct elf_image *ei, pid_t pid, unw_word_t ip,
+                    unsigned long *segbase, unsigned long *mapoff,
+                    char *path, size_t pathlen)
+{
+  struct map_iterator mi;
+  int found = 0, rc;
+  unsigned long hi;
+
+  if (maps_init (&mi, pid) < 0)
+    return -1;
+
+  while (maps_next (&mi, segbase, &hi, mapoff))
+    if (ip >= *segbase && ip < hi)
+      {
+        found = 1;
+        break;
+      }
+
+  if (!found)
+    {
+      maps_close (&mi);
+      return -1;
+    }
+  if (path)
+    {
+      strncpy(path, mi.path, pathlen);
+    }
+  rc = elf_map_image (ei, mi.path);
+  maps_close (&mi);
+  return rc;
+}
+
+#ifndef UNW_REMOTE_ONLY
+
+void
+tdep_get_exe_image_path (char *path)
+{
+  strcpy(path, "/proc/self/exe");
+}
+
+#endif /* !UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/dist/src/os-linux.h b/src/third_party/unwind/dist/src/os-linux.h
new file mode 100644
index 00000000000..3976b38cc29
--- /dev/null
+++ b/src/third_party/unwind/dist/src/os-linux.h
@@ -0,0 +1,297 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+   Copyright (C) 2007 David Mosberger-Tang
+        Contributed by David Mosberger-Tang <dmosberger@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef os_linux_h
+#define os_linux_h
+
+struct map_iterator
+  {
+    off_t offset;
+    int fd;
+    size_t buf_size;
+    char *buf;
+    char *buf_end;
+    char *path;
+  };
+
+static inline char *
+ltoa (char *buf, long val)
+{
+  char *cp = buf, tmp;
+  ssize_t i, len;
+
+  do
+    {
+      *cp++ = '0' + (val % 10);
+      val /= 10;
+    }
+  while (val);
+
+  /* reverse the order of the digits: */
+  len = cp - buf;
+  --cp;
+  for (i = 0; i < len / 2; ++i)
+    {
+      tmp = buf[i];
+      buf[i] = cp[-i];
+      cp[-i] = tmp;
+    }
+  return buf + len;
+}
+
+static inline int
+maps_init (struct map_iterator *mi, pid_t pid)
+{
+  char path[sizeof ("/proc/0123456789/maps")], *cp;
+
+  memcpy (path, "/proc/", 6);
+  cp = ltoa (path + 6, pid);
+  assert (cp + 6 < path + sizeof (path));
+  memcpy (cp, "/maps", 6);
+
+  mi->fd = open (path, O_RDONLY);
+  if (mi->fd >= 0)
+    {
+      /* Try to allocate a page-sized buffer.  */
+      mi->buf_size = getpagesize ();
+      cp = mmap (NULL, mi->buf_size, PROT_READ | PROT_WRITE,
+                 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+      if (cp == MAP_FAILED)
+        {
+          close(mi->fd);
+          mi->fd = -1;
+          return -1;
+        }
+      else
+        {
+          mi->offset = 0;
+          mi->buf = mi->buf_end = cp + mi->buf_size;
+          return 0;
+        }
+    }
+  return -1;
+}
+
+static inline char *
+skip_whitespace (char *cp)
+{
+  if (!cp)
+    return NULL;
+
+  while (*cp == ' ' || *cp == '\t')
+    ++cp;
+  return cp;
+}
+
+static inline char *
+scan_hex (char *cp, unsigned long *valp)
+{
+  unsigned long num_digits = 0, digit, val = 0;
+
+  cp = skip_whitespace (cp);
+  if (!cp)
+    return NULL;
+
+  while (1)
+    {
+      digit = *cp;
+      if ((digit - '0') <= 9)
+        digit -= '0';
+      else if ((digit - 'a') < 6)
+        digit -= 'a' - 10;
+      else if ((digit - 'A') < 6)
+        digit -= 'A' - 10;
+      else
+        break;
+      val = (val << 4) | digit;
+      ++num_digits;
+      ++cp;
+    }
+  if (!num_digits)
+    return NULL;
+  *valp = val;
+  return cp;
+}
+
+static inline char *
+scan_dec (char *cp, unsigned long *valp)
+{
+  unsigned long num_digits = 0, digit, val = 0;
+
+  if (!(cp = skip_whitespace (cp)))
+    return NULL;
+
+  while (1)
+    {
+      digit = *cp;
+      if ((digit - '0') <= 9)
+        {
+          digit -= '0';
+          ++cp;
+        }
+      else
+        break;
+      val = (10 * val) + digit;
+      ++num_digits;
+    }
+  if (!num_digits)
+    return NULL;
+  *valp = val;
+  return cp;
+}
+
+static inline char *
+scan_char (char *cp, char *valp)
+{
+  if (!cp)
+    return NULL;
+
+  *valp = *cp;
+
+  /* don't step over NUL terminator */
+  if (*cp)
+    ++cp;
+  return cp;
+}
+
+/* Scan a string delimited by white-space.  Fails on empty string or
+   if string is doesn't fit in the specified buffer.  */
+static inline char *
+scan_string (char *cp, char *valp, size_t buf_size)
+{
+  size_t i = 0;
+
+  if (!(cp = skip_whitespace (cp)))
+    return NULL;
+
+  while (*cp != ' ' && *cp != '\t' && *cp != '\0')
+    {
+      if ((valp != NULL) && (i < buf_size - 1))
+        valp[i++] = *cp;
+      ++cp;
+    }
+  if (i == 0 || i >= buf_size)
+    return NULL;
+  valp[i] = '\0';
+  return cp;
+}
+
+static inline int
+maps_next (struct map_iterator *mi,
+           unsigned long *low, unsigned long *high, unsigned long *offset)
+{
+  char perm[16], dash = 0, colon = 0, *cp;
+  unsigned long major, minor, inum;
+  ssize_t i, nread;
+
+  if (mi->fd < 0)
+    return 0;
+
+  while (1)
+    {
+      ssize_t bytes_left = mi->buf_end - mi->buf;
+      char *eol = NULL;
+
+      for (i = 0; i < bytes_left; ++i)
+        {
+          if (mi->buf[i] == '\n')
+            {
+              eol = mi->buf + i;
+              break;
+            }
+          else if (mi->buf[i] == '\0')
+            break;
+        }
+      if (!eol)
+        {
+          /* copy down the remaining bytes, if any */
+          if (bytes_left > 0)
+            memmove (mi->buf_end - mi->buf_size, mi->buf, bytes_left);
+
+          mi->buf = mi->buf_end - mi->buf_size;
+          nread = read (mi->fd, mi->buf + bytes_left,
+                        mi->buf_size - bytes_left);
+          if (nread <= 0)
+            return 0;
+          else if ((size_t) (nread + bytes_left) < mi->buf_size)
+            {
+              /* Move contents to the end of the buffer so we
+                 maintain the invariant that all bytes between
+                 mi->buf and mi->buf_end are valid.  */
+              memmove (mi->buf_end - nread - bytes_left, mi->buf,
+                       nread + bytes_left);
+              mi->buf = mi->buf_end - nread - bytes_left;
+            }
+
+          eol = mi->buf + bytes_left + nread - 1;
+
+          for (i = bytes_left; i < bytes_left + nread; ++i)
+            if (mi->buf[i] == '\n')
+              {
+                eol = mi->buf + i;
+                break;
+              }
+        }
+      cp = mi->buf;
+      mi->buf = eol + 1;
+      *eol = '\0';
+
+      /* scan: "LOW-HIGH PERM OFFSET MAJOR:MINOR INUM PATH" */
+      cp = scan_hex (cp, low);
+      cp = scan_char (cp, &dash);
+      cp = scan_hex (cp, high);
+      cp = scan_string (cp, perm, sizeof (perm));
+      cp = scan_hex (cp, offset);
+      cp = scan_hex (cp, &major);
+      cp = scan_char (cp, &colon);
+      cp = scan_hex (cp, &minor);
+      cp = scan_dec (cp, &inum);
+      cp = mi->path = skip_whitespace (cp);
+      if (!cp)
+        continue;
+      cp = scan_string (cp, NULL, 0);
+      if (dash != '-' || colon != ':')
+        continue;       /* skip line with unknown or bad format */
+      return 1;
+    }
+  return 0;
+}
+
+static inline void
+maps_close (struct map_iterator *mi)
+{
+  if (mi->fd < 0)
+    return;
+  close (mi->fd);
+  mi->fd = -1;
+  if (mi->buf)
+    {
+      munmap (mi->buf_end - mi->buf_size, mi->buf_size);
+      mi->buf = mi->buf_end = NULL;
+    }
+}
+
+#endif /* os_linux_h */
diff --git a/src/third_party/unwind/dist/src/os-qnx.c b/src/third_party/unwind/dist/src/os-qnx.c
new file mode 100644
index 00000000000..4a76c7cda41
--- /dev/null
+++ b/src/third_party/unwind/dist/src/os-qnx.c
@@ -0,0 +1,117 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2013 Garmin International
+        Contributed by Matt Fischer <matt.fischer@garmin.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <string.h>
+
+#include "libunwind_i.h"
+
+struct cb_info
+{
+    unw_word_t ip;
+    unsigned long segbase;
+    unsigned long offset;
+    const char *path;
+};
+
+static int callback(const struct dl_phdr_info *info, size_t size, void *data)
+{
+  int i;
+  struct cb_info *cbi = (struct cb_info*)data;
+  for(i=0; i<info->dlpi_phnum; i++) {
+    int segbase = info->dlpi_addr + info->dlpi_phdr[i].p_vaddr;
+    if(cbi->ip >= segbase && cbi->ip < segbase + info->dlpi_phdr[i].p_memsz)
+    {
+      cbi->path = info->dlpi_name;
+      cbi->offset = info->dlpi_phdr[i].p_offset;
+      cbi->segbase = segbase;
+      return 1;
+    }
+  }
+
+  return 0;
+}
+
+int
+tdep_get_elf_image (struct elf_image *ei, pid_t pid, unw_word_t ip,
+                    unsigned long *segbase, unsigned long *mapoff,
+                    char *path, size_t pathlen)
+{
+  struct cb_info cbi;
+  int ret = -1;
+  cbi.ip = ip;
+  cbi.segbase = 0;
+  cbi.offset = 0;
+  cbi.path = NULL;
+
+  /* QNX's support for accessing symbol maps is severely broken.  There is
+     a devctl() call that can be made on a proc node (DCMD_PROC_MAPDEBUG)
+     which returns information similar to Linux's /proc/<pid>/maps
+     node, however the filename that is returned by this call is not an
+     absolute path, and there is no foolproof way to map the filename
+     back to the file that it came from.
+
+     Therefore, the normal approach for implementing this function,
+     which works equally well for both local and remote unwinding,
+     will not work here.  The only type of image lookup which works
+     reliably is locally, using dl_iterate_phdr().  However, the only
+     time that this function is required to look up a remote image is for
+     ptrace support, which doesn't work on QNX anyway.  Local unwinding,
+     which is the main case that makes use of this function, will work
+     fine with dl_iterate_phdr().  Therefore, in lieu of any better
+     platform support for remote image lookup, this function has just
+     been implemented in terms of dl_iterate_phdr().
+  */
+
+  if (pid != getpid())
+  {
+    /* Return an error if an attempt is made to perform remote image lookup */
+    return -1;
+  }
+
+  if (dl_iterate_phdr (callback, &cbi) != 0)
+  {
+    if (path)
+    {
+      strncpy (path, cbi.path, pathlen);
+    }
+
+    *mapoff = cbi.offset;
+    *segbase = cbi.segbase;
+
+    ret = elf_map_image (ei, cbi.path);
+  }
+
+  return ret;
+}
+
+#ifndef UNW_REMOTE_ONLY
+
+void
+tdep_get_exe_image_path (char *path)
+{
+  path[0] = 0; /* XXX */
+}
+
+#endif
diff --git a/src/third_party/unwind/dist/src/ppc/Gget_proc_info.c b/src/third_party/unwind/dist/src/ppc/Gget_proc_info.c
new file mode 100644
index 00000000000..7dfb6d4e427
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc/Gget_proc_info.c
@@ -0,0 +1,41 @@
+/* libunwind - a platform-independent unwind library
+
+   Copied from src/x86_64/, modified slightly (or made empty stubs) for
+   building frysk successfully on ppc64, by Wu Zhou <woodzltc@cn.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <libunwind_i.h>
+
+int
+unw_get_proc_info (unw_cursor_t *cursor, unw_proc_info_t *pi)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  int ret;
+
+  ret = dwarf_make_proc_info (&c->dwarf);
+  if (ret < 0)
+    return ret;
+
+  *pi = c->dwarf.pi;
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/ppc/Gget_save_loc.c b/src/third_party/unwind/dist/src/ppc/Gget_save_loc.c
new file mode 100644
index 00000000000..5343fa4c7f3
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc/Gget_save_loc.c
@@ -0,0 +1,34 @@
+/* libunwind - a platform-independent unwind library
+
+   Copied from src/x86_64/, modified slightly (or made empty stubs) for
+   building frysk successfully on ppc64, by Wu Zhou <woodzltc@cn.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <libunwind_i.h>
+
+int
+unw_get_save_loc (unw_cursor_t *cursor, int reg, unw_save_loc_t *sloc)
+{
+  /* XXX: empty stub.  */
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/ppc/Ginit_local.c b/src/third_party/unwind/dist/src/ppc/Ginit_local.c
new file mode 100644
index 00000000000..366cf5bdaf3
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc/Ginit_local.c
@@ -0,0 +1,88 @@
+/* libunwind - a platform-independent unwind library
+
+   Copied from src/x86_64/, modified slightly (or made empty stubs) for
+   building frysk successfully on ppc64, by Wu Zhou <woodzltc@cn.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <libunwind_i.h>
+
+#ifdef UNW_TARGET_PPC64
+#include "../ppc64/init.h"
+#else
+#include "../ppc32/init.h"
+#endif
+
+#ifdef UNW_REMOTE_ONLY
+
+int
+unw_init_local (unw_cursor_t *cursor, ucontext_t *uc)
+{
+  /* XXX: empty stub.  */
+  return -UNW_EINVAL;
+}
+
+#else /* !UNW_REMOTE_ONLY */
+
+static int
+unw_init_local_common(unw_cursor_t *cursor, ucontext_t *uc, unsigned use_prev_instr)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  if (!tdep_init_done)
+    tdep_init ();
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  c->dwarf.as = unw_local_addr_space;
+  c->dwarf.as_arg = uc;
+  #ifdef UNW_TARGET_PPC64
+    return common_init_ppc64 (c, use_prev_instr);
+  #else
+    return common_init_ppc32 (c, use_prev_instr);
+  #endif
+}
+
+int
+unw_init_local(unw_cursor_t *cursor, ucontext_t *uc)
+{
+  return unw_init_local_common(cursor, uc, 1);
+}
+
+int
+unw_init_local2 (unw_cursor_t *cursor, ucontext_t *uc, int flag)
+{
+  if (!flag)
+    {
+      return unw_init_local_common(cursor, uc, 1);
+    }
+  else if (flag == UNW_INIT_SIGNAL_FRAME)
+    {
+      return unw_init_local_common(cursor, uc, 0);
+    }
+  else
+    {
+      return -UNW_EINVAL;
+    }
+}
+
+#endif /* !UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/dist/src/ppc/Ginit_remote.c b/src/third_party/unwind/dist/src/ppc/Ginit_remote.c
new file mode 100644
index 00000000000..ed85be8971f
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc/Ginit_remote.c
@@ -0,0 +1,60 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <libunwind_i.h>
+
+#ifdef UNW_TARGET_PPC64
+#include "../ppc64/init.h"
+#else
+#include "../ppc32/init.h"
+#endif
+
+int
+unw_init_remote (unw_cursor_t *cursor, unw_addr_space_t as, void *as_arg)
+{
+#ifdef UNW_LOCAL_ONLY
+  return -UNW_EINVAL;
+#else /* !UNW_LOCAL_ONLY */
+  struct cursor *c = (struct cursor *) cursor;
+
+  if (!tdep_init_done)
+    tdep_init ();
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  c->dwarf.as = as;
+  c->dwarf.as_arg = as_arg;
+
+  #ifdef UNW_TARGET_PPC64
+    return common_init_ppc64 (c, 0);
+  #elif UNW_TARGET_PPC32
+    return common_init_ppc32 (c, 0);
+  #else
+    #error init_remote :: NO VALID PPC ARCH!
+  #endif
+#endif /* !UNW_LOCAL_ONLY */
+}
diff --git a/src/third_party/unwind/dist/src/ppc/Gis_signal_frame.c b/src/third_party/unwind/dist/src/ppc/Gis_signal_frame.c
new file mode 100644
index 00000000000..6184dd5d410
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc/Gis_signal_frame.c
@@ -0,0 +1,78 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <libunwind_i.h>
+
+int
+unw_is_signal_frame (unw_cursor_t * cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  unw_word_t w0, w1, i0, i1, i2, ip;
+  unw_addr_space_t as;
+  unw_accessors_t *a;
+  void *arg;
+  int ret;
+
+  as = c->dwarf.as;
+  as->validate = 1;             /* Don't trust the ip */
+  arg = c->dwarf.as_arg;
+
+  /* Check if return address points at sigreturn sequence.
+     on ppc64 Linux that is (see libc.so):
+     0x38210080  addi r1, r1, 128  // pop the stack
+     0x380000ac  li r0, 172        // invoke system service 172
+     0x44000002  sc
+   */
+
+  ip = c->dwarf.ip;
+  if (ip == 0)
+    return 0;
+
+  /* Read up two 8-byte words at the IP.  We are only looking at 3
+     consecutive 32-bit words, so the second 8-byte word needs to be
+     shifted right by 32 bits (think big-endian) */
+
+  a = unw_get_accessors_int (as);
+  if ((ret = (*a->access_mem) (as, ip, &w0, 0, arg)) < 0
+      || (ret = (*a->access_mem) (as, ip + 8, &w1, 0, arg)) < 0)
+    return 0;
+
+  if (tdep_big_endian (as))
+    {
+      i0 = w0 >> 32;
+      i1 = w0 & 0xffffffffUL;
+      i2 = w1 >> 32;
+    }
+  else
+    {
+      i0 = w0 & 0xffffffffUL;
+      i1 = w0 >> 32;
+      i2 = w1 & 0xffffffffUL;
+    }
+
+  return (i0 == 0x38210080 && i1 == 0x380000ac && i2 == 0x44000002);
+}
diff --git a/src/third_party/unwind/dist/src/ppc/Lget_proc_info.c b/src/third_party/unwind/dist/src/ppc/Lget_proc_info.c
new file mode 100644
index 00000000000..69028b019fc
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc/Lget_proc_info.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gget_proc_info.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ppc/Lget_save_loc.c b/src/third_party/unwind/dist/src/ppc/Lget_save_loc.c
new file mode 100644
index 00000000000..9ea048a9076
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc/Lget_save_loc.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gget_save_loc.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ppc/Linit_local.c b/src/third_party/unwind/dist/src/ppc/Linit_local.c
new file mode 100644
index 00000000000..68a1687e854
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc/Linit_local.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit_local.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ppc/Linit_remote.c b/src/third_party/unwind/dist/src/ppc/Linit_remote.c
new file mode 100644
index 00000000000..58cb04ab7cd
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc/Linit_remote.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit_remote.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ppc/Lis_signal_frame.c b/src/third_party/unwind/dist/src/ppc/Lis_signal_frame.c
new file mode 100644
index 00000000000..b9a7c4f51ad
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc/Lis_signal_frame.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gis_signal_frame.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ppc/longjmp.S b/src/third_party/unwind/dist/src/ppc/longjmp.S
new file mode 100644
index 00000000000..d363aef222f
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc/longjmp.S
@@ -0,0 +1,36 @@
+/* libunwind - a platform-independent unwind library
+
+   Copied from src/x86_64/, modified slightly (or made empty stubs) for
+   building frysk successfully on ppc64, by Wu Zhou <woodzltc@cn.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+	.globl _UI_longjmp_cont
+
+	.type _UI_longjmp_cont, @function
+_UI_longjmp_cont:
+	.size _UI_longjmp_cont, .-_UI_longjmp_cont
+
+#ifdef __linux__
+        /* We do not need executable stack.  */
+        .section        .note.GNU-stack,"",@progbits
+#endif
diff --git a/src/third_party/unwind/dist/src/ppc/siglongjmp.S b/src/third_party/unwind/dist/src/ppc/siglongjmp.S
new file mode 100644
index 00000000000..64be36ce170
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc/siglongjmp.S
@@ -0,0 +1,31 @@
+/* libunwind - a platform-independent unwind library
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+	.globl _UI_siglongjmp_cont
+
+	_UI_siglongjmp_cont:
+
+#ifdef __linux__
+        /* We do not need executable stack.  */
+        .section        .note.GNU-stack,"",@progbits
+#endif
diff --git a/src/third_party/unwind/dist/src/ppc32/Gapply_reg_state.c b/src/third_party/unwind/dist/src/ppc32/Gapply_reg_state.c
new file mode 100644
index 00000000000..82f056da67e
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc32/Gapply_reg_state.c
@@ -0,0 +1,37 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_apply_reg_state (unw_cursor_t *cursor,
+		     void *reg_states_data)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  return dwarf_apply_reg_state (&c->dwarf, (dwarf_reg_state_t *)reg_states_data);
+}
diff --git a/src/third_party/unwind/dist/src/ppc32/Gcreate_addr_space.c b/src/third_party/unwind/dist/src/ppc32/Gcreate_addr_space.c
new file mode 100644
index 00000000000..aaa68bb3543
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc32/Gcreate_addr_space.c
@@ -0,0 +1,56 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <stdlib.h>
+
+#include <libunwind_i.h>
+
+unw_addr_space_t
+unw_create_addr_space (unw_accessors_t *a, int byte_order)
+{
+#ifdef UNW_LOCAL_ONLY
+  return NULL;
+#else
+  unw_addr_space_t as;
+
+  /*
+   * We support only big-endian on Linux ppc32.
+   */
+  if (byte_order != 0 && byte_order != __BIG_ENDIAN)
+    return NULL;
+
+  as = malloc (sizeof (*as));
+  if (!as)
+    return NULL;
+
+  memset (as, 0, sizeof (*as));
+
+  as->acc = *a;
+
+  return as;
+#endif
+}
diff --git a/src/third_party/unwind/dist/src/ppc32/Gglobal.c b/src/third_party/unwind/dist/src/ppc32/Gglobal.c
new file mode 100644
index 00000000000..a0f80beec6d
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc32/Gglobal.c
@@ -0,0 +1,135 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "dwarf_i.h"
+
+HIDDEN define_lock (ppc32_lock);
+HIDDEN int tdep_init_done;
+
+/* The API register numbers are exactly the same as the .eh_frame
+   registers, for now at least.  */
+HIDDEN const uint8_t dwarf_to_unw_regnum_map[DWARF_REGNUM_MAP_LENGTH] =
+  {
+        [UNW_PPC32_R0]=UNW_PPC32_R0,
+        [UNW_PPC32_R1]=UNW_PPC32_R1,
+        [UNW_PPC32_R2]=UNW_PPC32_R2,
+        [UNW_PPC32_R3]=UNW_PPC32_R3,
+        [UNW_PPC32_R4]=UNW_PPC32_R4,
+        [UNW_PPC32_R5]=UNW_PPC32_R5,
+        [UNW_PPC32_R6]=UNW_PPC32_R6,
+        [UNW_PPC32_R7]=UNW_PPC32_R7,
+        [UNW_PPC32_R8]=UNW_PPC32_R8,
+        [UNW_PPC32_R9]=UNW_PPC32_R9,
+        [UNW_PPC32_R10]=UNW_PPC32_R10,
+        [UNW_PPC32_R11]=UNW_PPC32_R11,
+        [UNW_PPC32_R12]=UNW_PPC32_R12,
+        [UNW_PPC32_R13]=UNW_PPC32_R13,
+        [UNW_PPC32_R14]=UNW_PPC32_R14,
+        [UNW_PPC32_R15]=UNW_PPC32_R15,
+        [UNW_PPC32_R16]=UNW_PPC32_R16,
+        [UNW_PPC32_R17]=UNW_PPC32_R17,
+        [UNW_PPC32_R18]=UNW_PPC32_R18,
+        [UNW_PPC32_R19]=UNW_PPC32_R19,
+        [UNW_PPC32_R20]=UNW_PPC32_R20,
+        [UNW_PPC32_R21]=UNW_PPC32_R21,
+        [UNW_PPC32_R22]=UNW_PPC32_R22,
+        [UNW_PPC32_R23]=UNW_PPC32_R23,
+        [UNW_PPC32_R24]=UNW_PPC32_R24,
+        [UNW_PPC32_R25]=UNW_PPC32_R25,
+        [UNW_PPC32_R26]=UNW_PPC32_R26,
+        [UNW_PPC32_R27]=UNW_PPC32_R27,
+        [UNW_PPC32_R28]=UNW_PPC32_R28,
+        [UNW_PPC32_R29]=UNW_PPC32_R29,
+        [UNW_PPC32_R30]=UNW_PPC32_R30,
+        [UNW_PPC32_R31]=UNW_PPC32_R31,
+
+        [UNW_PPC32_CTR]=UNW_PPC32_CTR,
+        [UNW_PPC32_XER]=UNW_PPC32_XER,
+        [UNW_PPC32_CCR]=UNW_PPC32_CCR,
+        [UNW_PPC32_LR]=UNW_PPC32_LR,
+        [UNW_PPC32_FPSCR]=UNW_PPC32_FPSCR,
+
+        [UNW_PPC32_F0]=UNW_PPC32_F0,
+        [UNW_PPC32_F1]=UNW_PPC32_F1,
+        [UNW_PPC32_F2]=UNW_PPC32_F2,
+        [UNW_PPC32_F3]=UNW_PPC32_F3,
+        [UNW_PPC32_F4]=UNW_PPC32_F4,
+        [UNW_PPC32_F5]=UNW_PPC32_F5,
+        [UNW_PPC32_F6]=UNW_PPC32_F6,
+        [UNW_PPC32_F7]=UNW_PPC32_F7,
+        [UNW_PPC32_F8]=UNW_PPC32_F8,
+        [UNW_PPC32_F9]=UNW_PPC32_F9,
+        [UNW_PPC32_F10]=UNW_PPC32_F10,
+        [UNW_PPC32_F11]=UNW_PPC32_F11,
+        [UNW_PPC32_F12]=UNW_PPC32_F12,
+        [UNW_PPC32_F13]=UNW_PPC32_F13,
+        [UNW_PPC32_F14]=UNW_PPC32_F14,
+        [UNW_PPC32_F15]=UNW_PPC32_F15,
+        [UNW_PPC32_F16]=UNW_PPC32_F16,
+        [UNW_PPC32_F17]=UNW_PPC32_F17,
+        [UNW_PPC32_F18]=UNW_PPC32_F18,
+        [UNW_PPC32_F19]=UNW_PPC32_F19,
+        [UNW_PPC32_F20]=UNW_PPC32_F20,
+        [UNW_PPC32_F21]=UNW_PPC32_F21,
+        [UNW_PPC32_F22]=UNW_PPC32_F22,
+        [UNW_PPC32_F23]=UNW_PPC32_F23,
+        [UNW_PPC32_F24]=UNW_PPC32_F24,
+        [UNW_PPC32_F25]=UNW_PPC32_F25,
+        [UNW_PPC32_F26]=UNW_PPC32_F26,
+        [UNW_PPC32_F27]=UNW_PPC32_F27,
+        [UNW_PPC32_F28]=UNW_PPC32_F28,
+        [UNW_PPC32_F29]=UNW_PPC32_F29,
+        [UNW_PPC32_F30]=UNW_PPC32_F30,
+        [UNW_PPC32_F31]=UNW_PPC32_F31,
+};
+
+HIDDEN void
+tdep_init (void)
+{
+  intrmask_t saved_mask;
+
+  sigfillset (&unwi_full_mask);
+
+  lock_acquire (&ppc32_lock, saved_mask);
+  {
+    if (tdep_init_done)
+      /* another thread else beat us to it... */
+      goto out;
+
+    mi_init ();
+
+    dwarf_init ();
+
+#ifndef UNW_REMOTE_ONLY
+    ppc32_local_addr_space_init ();
+#endif
+    tdep_init_done = 1; /* signal that we're initialized... */
+  }
+ out:
+  lock_release (&ppc32_lock, saved_mask);
+}
diff --git a/src/third_party/unwind/dist/src/ppc32/Ginit.c b/src/third_party/unwind/dist/src/ppc32/Ginit.c
new file mode 100644
index 00000000000..ba302448a31
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc32/Ginit.c
@@ -0,0 +1,216 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "ucontext_i.h"
+#include "unwind_i.h"
+
+#ifdef UNW_REMOTE_ONLY
+
+/* unw_local_addr_space is a NULL pointer in this case.  */
+unw_addr_space_t unw_local_addr_space;
+
+#else /* !UNW_REMOTE_ONLY */
+
+static struct unw_addr_space local_addr_space;
+
+unw_addr_space_t unw_local_addr_space = &local_addr_space;
+
+static void *
+uc_addr (ucontext_t *uc, int reg)
+{
+  void *addr;
+
+  if ((unsigned) (reg - UNW_PPC32_R0) < 32)
+    addr = &uc->uc_mcontext.uc_regs->gregs[reg - UNW_PPC32_R0];
+
+  else
+  if ( ((unsigned) (reg - UNW_PPC32_F0) < 32) &&
+       ((unsigned) (reg - UNW_PPC32_F0) >= 0) )
+    addr = &uc->uc_mcontext.uc_regs->fpregs.fpregs[reg - UNW_PPC32_F0];
+
+  else
+    {
+      unsigned gregs_idx;
+
+      switch (reg)
+        {
+        case UNW_PPC32_CTR:
+          gregs_idx = CTR_IDX;
+          break;
+        case UNW_PPC32_LR:
+          gregs_idx = LINK_IDX;
+          break;
+        case UNW_PPC32_XER:
+          gregs_idx = XER_IDX;
+          break;
+        case UNW_PPC32_CCR:
+          gregs_idx = CCR_IDX;
+          break;
+        default:
+          return NULL;
+        }
+      addr = &uc->uc_mcontext.uc_regs->gregs[gregs_idx];
+    }
+  return addr;
+}
+
+# ifdef UNW_LOCAL_ONLY
+
+HIDDEN void *
+tdep_uc_addr (ucontext_t *uc, int reg)
+{
+  return uc_addr (uc, reg);
+}
+
+# endif /* UNW_LOCAL_ONLY */
+
+HIDDEN unw_dyn_info_list_t _U_dyn_info_list;
+
+
+static void
+put_unwind_info (unw_addr_space_t as, unw_proc_info_t *proc_info, void *arg)
+{
+  /* it's a no-op */
+}
+
+static int
+get_dyn_info_list_addr (unw_addr_space_t as, unw_word_t *dyn_info_list_addr,
+                        void *arg)
+{
+  *dyn_info_list_addr = (unw_word_t) &_U_dyn_info_list;
+  return 0;
+}
+
+static int
+access_mem (unw_addr_space_t as, unw_word_t addr, unw_word_t *val, int write,
+            void *arg)
+{
+  if (write)
+    {
+      Debug (12, "mem[%lx] <- %lx\n", addr, *val);
+      *(unw_word_t *) addr = *val;
+    }
+  else
+    {
+      *val = *(unw_word_t *) addr;
+      Debug (12, "mem[%lx] -> %lx\n", addr, *val);
+    }
+  return 0;
+}
+
+static int
+access_reg (unw_addr_space_t as, unw_regnum_t reg, unw_word_t *val,
+            int write, void *arg)
+{
+  unw_word_t *addr;
+  ucontext_t *uc = arg;
+
+  if ( ((unsigned int) (reg - UNW_PPC32_F0) < 32) &&
+       ((unsigned int) (reg - UNW_PPC32_F0) >= 0))
+    goto badreg;
+
+  addr = uc_addr (uc, reg);
+  if (!addr)
+    goto badreg;
+
+  if (write)
+    {
+      *(unw_word_t *) addr = *val;
+      Debug (12, "%s <- %lx\n", unw_regname (reg), *val);
+    }
+  else
+    {
+      *val = *(unw_word_t *) addr;
+      Debug (12, "%s -> %lx\n", unw_regname (reg), *val);
+    }
+  return 0;
+
+badreg:
+  Debug (1, "bad register number %u\n", reg);
+  return -UNW_EBADREG;
+}
+
+static int
+access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val,
+              int write, void *arg)
+{
+  ucontext_t *uc = arg;
+  unw_fpreg_t *addr;
+
+  if ((unsigned) (reg - UNW_PPC32_F0) < 0)
+    goto badreg;
+
+  addr = uc_addr (uc, reg);
+  if (!addr)
+    goto badreg;
+
+  if (write)
+    {
+      Debug (12, "%s <- %016Lf\n", unw_regname (reg), *val);
+      *(unw_fpreg_t *) addr = *val;
+    }
+  else
+    {
+      *val = *(unw_fpreg_t *) addr;
+      Debug (12, "%s -> %016Lf\n", unw_regname (reg), *val);
+    }
+  return 0;
+
+badreg:
+  Debug (1, "bad register number %u\n", reg);
+  /* attempt to access a non-preserved register */
+  return -UNW_EBADREG;
+}
+
+static int
+get_static_proc_name (unw_addr_space_t as, unw_word_t ip,
+                      char *buf, size_t buf_len, unw_word_t *offp,
+                      void *arg)
+{
+  return _Uelf32_get_proc_name (as, getpid (), ip, buf, buf_len, offp);
+}
+
+HIDDEN void
+ppc32_local_addr_space_init (void)
+{
+  memset (&local_addr_space, 0, sizeof (local_addr_space));
+  local_addr_space.caching_policy = UNWI_DEFAULT_CACHING_POLICY;
+  local_addr_space.acc.find_proc_info = dwarf_find_proc_info;
+  local_addr_space.acc.put_unwind_info = put_unwind_info;
+  local_addr_space.acc.get_dyn_info_list_addr = get_dyn_info_list_addr;
+  local_addr_space.acc.access_mem = access_mem;
+  local_addr_space.acc.access_reg = access_reg;
+  local_addr_space.acc.access_fpreg = access_fpreg;
+  local_addr_space.acc.resume = ppc32_local_resume;
+  local_addr_space.acc.get_proc_name = get_static_proc_name;
+  unw_flush_cache (&local_addr_space, 0, 0);
+}
+
+#endif /* !UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/dist/src/ppc32/Greg_states_iterate.c b/src/third_party/unwind/dist/src/ppc32/Greg_states_iterate.c
new file mode 100644
index 00000000000..a17dc1b561d
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc32/Greg_states_iterate.c
@@ -0,0 +1,37 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_reg_states_iterate (unw_cursor_t *cursor,
+			unw_reg_states_callback cb, void *token)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  return dwarf_reg_states_iterate (&c->dwarf, cb, token);
+}
diff --git a/src/third_party/unwind/dist/src/ppc32/Gregs.c b/src/third_party/unwind/dist/src/ppc32/Gregs.c
new file mode 100644
index 00000000000..9344455e6cc
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc32/Gregs.c
@@ -0,0 +1,90 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+HIDDEN int
+tdep_access_reg (struct cursor *c, unw_regnum_t reg, unw_word_t *valp,
+                 int write)
+{
+  struct dwarf_loc loc;
+
+  switch (reg)
+    {
+    case UNW_TDEP_IP:
+      if (write)
+        {
+          c->dwarf.ip = *valp;  /* update the IP cache */
+          if (c->dwarf.pi_valid && (*valp < c->dwarf.pi.start_ip
+                                    || *valp >= c->dwarf.pi.end_ip))
+            c->dwarf.pi_valid = 0;      /* new IP outside of current proc */
+        }
+      else
+        *valp = c->dwarf.ip;
+      return 0;
+
+    case UNW_TDEP_SP:
+      if (write)
+        return -UNW_EREADONLYREG;
+      *valp = c->dwarf.cfa;
+      return 0;
+
+
+    default:
+      break;
+    }
+
+  /* make sure it's not an FP or VR register */
+  if ((((unsigned) (reg - UNW_PPC32_F0)) <= 31))
+    return -UNW_EBADREG;
+
+  loc = c->dwarf.loc[reg];
+
+  if (write)
+    return dwarf_put (&c->dwarf, loc, *valp);
+  else
+    return dwarf_get (&c->dwarf, loc, valp);
+}
+
+HIDDEN int
+tdep_access_fpreg (struct cursor *c, unw_regnum_t reg, unw_fpreg_t *valp,
+                   int write)
+{
+  struct dwarf_loc loc;
+
+  if ((unsigned) (reg - UNW_PPC32_F0) < 32)
+  {
+    loc = c->dwarf.loc[reg];
+    if (write)
+      return dwarf_putfp (&c->dwarf, loc, *valp);
+    else
+      return dwarf_getfp (&c->dwarf, loc, valp);
+  }
+
+  return -UNW_EBADREG;
+}
+
diff --git a/src/third_party/unwind/dist/src/ppc32/Gresume.c b/src/third_party/unwind/dist/src/ppc32/Gresume.c
new file mode 100644
index 00000000000..c0f95837b33
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc32/Gresume.c
@@ -0,0 +1,77 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford cjashfor@us.ibm.com
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <stdlib.h>
+
+#include "unwind_i.h"
+
+#ifndef UNW_REMOTE_ONLY
+
+#include <sys/syscall.h>
+
+/* sigreturn() is a no-op on x86_64 glibc.  */
+
+static NORETURN inline long
+my_rt_sigreturn (void *new_sp)
+{
+  /* XXX: empty stub.  */
+  abort ();
+}
+
+HIDDEN inline int
+ppc32_local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg)
+{
+  /* XXX: empty stub.  */
+  return -UNW_EINVAL;
+}
+
+#endif /* !UNW_REMOTE_ONLY */
+
+/* This routine is responsible for copying the register values in
+   cursor C and establishing them as the current machine state. */
+
+static inline int
+establish_machine_state (struct cursor *c)
+{
+  /* XXX: empty stub.  */
+  return 0;
+}
+
+int
+unw_resume (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  int ret;
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  if ((ret = establish_machine_state (c)) < 0)
+    return ret;
+
+  return (*c->dwarf.as->acc.resume) (c->dwarf.as, (unw_cursor_t *) c,
+                                     c->dwarf.as_arg);
+}
diff --git a/src/third_party/unwind/dist/src/ppc32/Gstep.c b/src/third_party/unwind/dist/src/ppc32/Gstep.c
new file mode 100644
index 00000000000..478d3a6c1b8
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc32/Gstep.c
@@ -0,0 +1,309 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "ucontext_i.h"
+#include <signal.h>
+
+/* This definition originates in /usr/include/asm-ppc64/ptrace.h, but is
+   defined there only when __KERNEL__ is defined.  We reproduce it here for
+   our use at the user level in order to locate the ucontext record, which
+   appears to be at this offset relative to the stack pointer when in the
+   context of the signal handler return trampoline code -
+   __kernel_sigtramp_rt64.  */
+#define __SIGNAL_FRAMESIZE 128
+
+/* This definition comes from the document "64-bit PowerPC ELF Application
+   Binary Interface Supplement 1.9", section 3.2.2.
+   http://www.linux-foundation.org/spec/ELF/ppc64/PPC-elf64abi-1.9.html#STACK */
+
+typedef struct
+{
+  long unsigned back_chain;
+  long unsigned lr_save;
+  /* many more fields here, but they are unused by this code */
+} stack_frame_t;
+
+
+int
+unw_step (unw_cursor_t * cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  stack_frame_t dummy;
+  unw_word_t back_chain_offset, lr_save_offset;
+  struct dwarf_loc back_chain_loc, lr_save_loc, sp_loc, ip_loc;
+  int ret;
+
+  Debug (1, "(cursor=%p, ip=0x%016lx)\n", c, (unsigned long) c->dwarf.ip);
+
+  if (c->dwarf.ip == 0)
+    {
+      /* Unless the cursor or stack is corrupt or uninitialized,
+         we've most likely hit the top of the stack */
+      return 0;
+    }
+
+  /* Try DWARF-based unwinding... */
+
+  ret = dwarf_step (&c->dwarf);
+
+  if (ret < 0 && ret != -UNW_ENOINFO)
+    {
+      Debug (2, "returning %d\n", ret);
+      return ret;
+    }
+
+  if (unlikely (ret < 0))
+    {
+      if (likely (unw_is_signal_frame (cursor) <= 0))
+        {
+          /* DWARF unwinding failed.  As of 09/26/2006, gcc in 64-bit mode
+             produces the mandatory level of traceback record in the code, but
+             I get the impression that this is transitory, that eventually gcc
+             will not produce any traceback records at all.  So, for now, we
+             won't bother to try to find and use these records.
+
+             We can, however, attempt to unwind the frame by using the callback
+             chain.  This is very crude, however, and won't be able to unwind
+             any registers besides the IP, SP, and LR . */
+
+          back_chain_offset = ((void *) &dummy.back_chain - (void *) &dummy);
+          lr_save_offset = ((void *) &dummy.lr_save - (void *) &dummy);
+
+          back_chain_loc = DWARF_LOC (c->dwarf.cfa + back_chain_offset, 0);
+
+          if ((ret =
+               dwarf_get (&c->dwarf, back_chain_loc, &c->dwarf.cfa)) < 0)
+            {
+              Debug (2,
+                 "Unable to retrieve CFA from back chain in stack frame - %d\n",
+                 ret);
+              return ret;
+            }
+          if (c->dwarf.cfa == 0)
+            /* Unless the cursor or stack is corrupt or uninitialized we've most
+               likely hit the top of the stack */
+            return 0;
+
+          lr_save_loc = DWARF_LOC (c->dwarf.cfa + lr_save_offset, 0);
+
+          if ((ret = dwarf_get (&c->dwarf, lr_save_loc, &c->dwarf.ip)) < 0)
+            {
+              Debug (2,
+                 "Unable to retrieve IP from lr save in stack frame - %d\n",
+                 ret);
+              return ret;
+            }
+          ret = 1;
+        }
+      else
+        {
+          /* Find the sigcontext record by taking the CFA and adjusting by
+             the dummy signal frame size.
+
+             Note that there isn't any way to determined if SA_SIGINFO was
+             set in the sa_flags parameter to sigaction when the signal
+             handler was established.  If it was not set, the ucontext
+             record is not required to be on the stack, in which case the
+             following code will likely cause a seg fault or other crash
+             condition.  */
+
+          unw_word_t ucontext = c->dwarf.cfa + __SIGNAL_FRAMESIZE;
+
+          Debug (1, "signal frame, skip over trampoline\n");
+
+          c->sigcontext_format = PPC_SCF_LINUX_RT_SIGFRAME;
+          c->sigcontext_addr = ucontext;
+
+          sp_loc = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R1, 0);
+          ip_loc = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_LINK, 0);
+
+          ret = dwarf_get (&c->dwarf, sp_loc, &c->dwarf.cfa);
+          if (ret < 0)
+            {
+              Debug (2, "returning %d\n", ret);
+              return ret;
+            }
+          ret = dwarf_get (&c->dwarf, ip_loc, &c->dwarf.ip);
+          if (ret < 0)
+            {
+              Debug (2, "returning %d\n", ret);
+              return ret;
+            }
+
+          /* Instead of just restoring the non-volatile registers, do all
+             of the registers for now.  This will incur a performance hit,
+             but it's rare enough not to cause too much of a problem, and
+             might be useful in some cases.  */
+          c->dwarf.loc[UNW_PPC32_R0] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R0, 0);
+          c->dwarf.loc[UNW_PPC32_R1] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R1, 0);
+          c->dwarf.loc[UNW_PPC32_R2] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R2, 0);
+          c->dwarf.loc[UNW_PPC32_R3] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R3, 0);
+          c->dwarf.loc[UNW_PPC32_R4] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R4, 0);
+          c->dwarf.loc[UNW_PPC32_R5] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R5, 0);
+          c->dwarf.loc[UNW_PPC32_R6] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R6, 0);
+          c->dwarf.loc[UNW_PPC32_R7] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R7, 0);
+          c->dwarf.loc[UNW_PPC32_R8] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R8, 0);
+          c->dwarf.loc[UNW_PPC32_R9] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R9, 0);
+          c->dwarf.loc[UNW_PPC32_R10] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R10, 0);
+          c->dwarf.loc[UNW_PPC32_R11] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R11, 0);
+          c->dwarf.loc[UNW_PPC32_R12] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R12, 0);
+          c->dwarf.loc[UNW_PPC32_R13] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R13, 0);
+          c->dwarf.loc[UNW_PPC32_R14] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R14, 0);
+          c->dwarf.loc[UNW_PPC32_R15] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R15, 0);
+          c->dwarf.loc[UNW_PPC32_R16] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R16, 0);
+          c->dwarf.loc[UNW_PPC32_R17] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R17, 0);
+          c->dwarf.loc[UNW_PPC32_R18] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R18, 0);
+          c->dwarf.loc[UNW_PPC32_R19] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R19, 0);
+          c->dwarf.loc[UNW_PPC32_R20] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R20, 0);
+          c->dwarf.loc[UNW_PPC32_R21] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R21, 0);
+          c->dwarf.loc[UNW_PPC32_R22] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R22, 0);
+          c->dwarf.loc[UNW_PPC32_R23] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R23, 0);
+          c->dwarf.loc[UNW_PPC32_R24] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R24, 0);
+          c->dwarf.loc[UNW_PPC32_R25] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R25, 0);
+          c->dwarf.loc[UNW_PPC32_R26] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R26, 0);
+          c->dwarf.loc[UNW_PPC32_R27] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R27, 0);
+          c->dwarf.loc[UNW_PPC32_R28] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R28, 0);
+          c->dwarf.loc[UNW_PPC32_R29] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R29, 0);
+          c->dwarf.loc[UNW_PPC32_R30] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R30, 0);
+          c->dwarf.loc[UNW_PPC32_R31] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R31, 0);
+
+          c->dwarf.loc[UNW_PPC32_LR] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_LINK, 0);
+          c->dwarf.loc[UNW_PPC32_CTR] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_CTR, 0);
+
+          /* This CR0 assignment is probably wrong.  There are 8 dwarf columns
+             assigned to the CR registers, but only one CR register in the
+             mcontext structure */
+          c->dwarf.loc[UNW_PPC32_CCR] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_CCR, 0);
+          c->dwarf.loc[UNW_PPC32_XER] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_XER, 0);
+
+          c->dwarf.loc[UNW_PPC32_F0] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R0, 0);
+          c->dwarf.loc[UNW_PPC32_F1] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R1, 0);
+          c->dwarf.loc[UNW_PPC32_F2] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R2, 0);
+          c->dwarf.loc[UNW_PPC32_F3] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R3, 0);
+          c->dwarf.loc[UNW_PPC32_F4] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R4, 0);
+          c->dwarf.loc[UNW_PPC32_F5] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R5, 0);
+          c->dwarf.loc[UNW_PPC32_F6] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R6, 0);
+          c->dwarf.loc[UNW_PPC32_F7] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R7, 0);
+          c->dwarf.loc[UNW_PPC32_F8] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R8, 0);
+          c->dwarf.loc[UNW_PPC32_F9] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R9, 0);
+          c->dwarf.loc[UNW_PPC32_F10] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R10, 0);
+          c->dwarf.loc[UNW_PPC32_F11] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R11, 0);
+          c->dwarf.loc[UNW_PPC32_F12] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R12, 0);
+          c->dwarf.loc[UNW_PPC32_F13] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R13, 0);
+          c->dwarf.loc[UNW_PPC32_F14] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R14, 0);
+          c->dwarf.loc[UNW_PPC32_F15] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R15, 0);
+          c->dwarf.loc[UNW_PPC32_F16] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R16, 0);
+          c->dwarf.loc[UNW_PPC32_F17] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R17, 0);
+          c->dwarf.loc[UNW_PPC32_F18] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R18, 0);
+          c->dwarf.loc[UNW_PPC32_F19] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R19, 0);
+          c->dwarf.loc[UNW_PPC32_F20] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R20, 0);
+          c->dwarf.loc[UNW_PPC32_F21] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R21, 0);
+          c->dwarf.loc[UNW_PPC32_F22] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R22, 0);
+          c->dwarf.loc[UNW_PPC32_F23] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R23, 0);
+          c->dwarf.loc[UNW_PPC32_F24] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R24, 0);
+          c->dwarf.loc[UNW_PPC32_F25] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R25, 0);
+          c->dwarf.loc[UNW_PPC32_F26] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R26, 0);
+          c->dwarf.loc[UNW_PPC32_F27] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R27, 0);
+          c->dwarf.loc[UNW_PPC32_F28] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R28, 0);
+          c->dwarf.loc[UNW_PPC32_F29] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R29, 0);
+          c->dwarf.loc[UNW_PPC32_F30] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R30, 0);
+          c->dwarf.loc[UNW_PPC32_F31] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R31, 0);
+
+          ret = 1;
+        }
+    }
+  return ret;
+}
diff --git a/src/third_party/unwind/dist/src/ppc32/Lapply_reg_state.c b/src/third_party/unwind/dist/src/ppc32/Lapply_reg_state.c
new file mode 100644
index 00000000000..7ebada480e5
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc32/Lapply_reg_state.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gapply_reg_state.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ppc32/Lcreate_addr_space.c b/src/third_party/unwind/dist/src/ppc32/Lcreate_addr_space.c
new file mode 100644
index 00000000000..0f2dc6be901
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc32/Lcreate_addr_space.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gcreate_addr_space.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ppc32/Lglobal.c b/src/third_party/unwind/dist/src/ppc32/Lglobal.c
new file mode 100644
index 00000000000..6d7b489e14b
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc32/Lglobal.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gglobal.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ppc32/Linit.c b/src/third_party/unwind/dist/src/ppc32/Linit.c
new file mode 100644
index 00000000000..e9abfdd46a3
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc32/Linit.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ppc32/Lreg_states_iterate.c b/src/third_party/unwind/dist/src/ppc32/Lreg_states_iterate.c
new file mode 100644
index 00000000000..f1eb1e79dcd
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc32/Lreg_states_iterate.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Greg_states_iterate.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ppc32/Lregs.c b/src/third_party/unwind/dist/src/ppc32/Lregs.c
new file mode 100644
index 00000000000..2c9c75cd7d9
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc32/Lregs.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gregs.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ppc32/Lresume.c b/src/third_party/unwind/dist/src/ppc32/Lresume.c
new file mode 100644
index 00000000000..41a8cf003de
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc32/Lresume.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gresume.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ppc32/Lstep.c b/src/third_party/unwind/dist/src/ppc32/Lstep.c
new file mode 100644
index 00000000000..c1ac3c7547f
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc32/Lstep.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gstep.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ppc32/get_func_addr.c b/src/third_party/unwind/dist/src/ppc32/get_func_addr.c
new file mode 100644
index 00000000000..66ff795fe7e
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc32/get_func_addr.c
@@ -0,0 +1,36 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+tdep_get_func_addr (unw_addr_space_t as, unw_word_t symbol_val_addr,
+                    unw_word_t *real_func_addr)
+{
+  *real_func_addr = symbol_val_addr;
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/ppc32/init.h b/src/third_party/unwind/dist/src/ppc32/init.h
new file mode 100644
index 00000000000..87a69b1450a
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc32/init.h
@@ -0,0 +1,72 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+/* Here is the "common" init, for remote and local debuging" */
+
+static inline int
+common_init_ppc32 (struct cursor *c, unsigned use_prev_instr)
+{
+  int ret;
+  int i;
+
+  for (i = UNW_PPC32_R0; i <= UNW_PPC32_R31; i++) {
+    c->dwarf.loc[i] = DWARF_REG_LOC (&c->dwarf, i);
+  }
+  for (i = UNW_PPC32_F0; i <= UNW_PPC32_F31; i++) {
+    c->dwarf.loc[i] = DWARF_FPREG_LOC (&c->dwarf, i);
+  }
+
+  c->dwarf.loc[UNW_PPC32_CTR] = DWARF_REG_LOC (&c->dwarf, UNW_PPC32_CTR);
+  c->dwarf.loc[UNW_PPC32_XER] = DWARF_REG_LOC (&c->dwarf, UNW_PPC32_XER);
+  c->dwarf.loc[UNW_PPC32_CCR] = DWARF_REG_LOC (&c->dwarf, UNW_PPC32_CCR);
+  c->dwarf.loc[UNW_PPC32_LR] = DWARF_REG_LOC (&c->dwarf, UNW_PPC32_LR);
+  c->dwarf.loc[UNW_PPC32_FPSCR] = DWARF_REG_LOC (&c->dwarf, UNW_PPC32_FPSCR);
+
+  ret = dwarf_get (&c->dwarf, c->dwarf.loc[UNW_PPC32_LR], &c->dwarf.ip);
+  if (ret < 0)
+    return ret;
+
+  ret = dwarf_get (&c->dwarf, DWARF_REG_LOC (&c->dwarf, UNW_PPC32_R1),
+                   &c->dwarf.cfa);
+  if (ret < 0)
+    return ret;
+
+  c->sigcontext_format = PPC_SCF_NONE;
+  c->sigcontext_addr = 0;
+
+  c->dwarf.args_size = 0;
+  c->dwarf.stash_frames = 0;
+  c->dwarf.use_prev_instr = use_prev_instr;
+  c->dwarf.pi_valid = 0;
+  c->dwarf.pi_is_dynamic = 0;
+  c->dwarf.hint = 0;
+  c->dwarf.prev_rs = 0;
+
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/ppc32/is_fpreg.c b/src/third_party/unwind/dist/src/ppc32/is_fpreg.c
new file mode 100644
index 00000000000..646ff2379c4
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc32/is_fpreg.c
@@ -0,0 +1,34 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "libunwind_i.h"
+
+int
+unw_is_fpreg (int regnum)
+{
+  return (regnum >= UNW_PPC32_F0 && regnum <= UNW_PPC32_F31);
+}
diff --git a/src/third_party/unwind/dist/src/ppc32/regname.c b/src/third_party/unwind/dist/src/ppc32/regname.c
new file mode 100644
index 00000000000..459b83a4e55
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc32/regname.c
@@ -0,0 +1,112 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+static const char *regname[] =
+  {
+    [UNW_PPC32_R0]="GPR0",
+    [UNW_PPC32_R1]="GPR1",
+    [UNW_PPC32_R2]="GPR2",
+    [UNW_PPC32_R3]="GPR3",
+    [UNW_PPC32_R4]="GPR4",
+    [UNW_PPC32_R5]="GPR5",
+    [UNW_PPC32_R6]="GPR6",
+    [UNW_PPC32_R7]="GPR7",
+    [UNW_PPC32_R8]="GPR8",
+    [UNW_PPC32_R9]="GPR9",
+    [UNW_PPC32_R10]="GPR10",
+    [UNW_PPC32_R11]="GPR11",
+    [UNW_PPC32_R12]="GPR12",
+    [UNW_PPC32_R13]="GPR13",
+    [UNW_PPC32_R14]="GPR14",
+    [UNW_PPC32_R15]="GPR15",
+    [UNW_PPC32_R16]="GPR16",
+    [UNW_PPC32_R17]="GPR17",
+    [UNW_PPC32_R18]="GPR18",
+    [UNW_PPC32_R19]="GPR19",
+    [UNW_PPC32_R20]="GPR20",
+    [UNW_PPC32_R21]="GPR21",
+    [UNW_PPC32_R22]="GPR22",
+    [UNW_PPC32_R23]="GPR23",
+    [UNW_PPC32_R24]="GPR24",
+    [UNW_PPC32_R25]="GPR25",
+    [UNW_PPC32_R26]="GPR26",
+    [UNW_PPC32_R27]="GPR27",
+    [UNW_PPC32_R28]="GPR28",
+    [UNW_PPC32_R29]="GPR29",
+    [UNW_PPC32_R30]="GPR30",
+    [UNW_PPC32_R31]="GPR31",
+
+    [UNW_PPC32_CTR]="CTR",
+    [UNW_PPC32_XER]="XER",
+    [UNW_PPC32_CCR]="CCR",
+    [UNW_PPC32_LR]="LR",
+    [UNW_PPC32_FPSCR]="FPSCR",
+
+    [UNW_PPC32_F0]="FPR0",
+    [UNW_PPC32_F1]="FPR1",
+    [UNW_PPC32_F2]="FPR2",
+    [UNW_PPC32_F3]="FPR3",
+    [UNW_PPC32_F4]="FPR4",
+    [UNW_PPC32_F5]="FPR5",
+    [UNW_PPC32_F6]="FPR6",
+    [UNW_PPC32_F7]="FPR7",
+    [UNW_PPC32_F8]="FPR8",
+    [UNW_PPC32_F9]="FPR9",
+    [UNW_PPC32_F10]="FPR10",
+    [UNW_PPC32_F11]="FPR11",
+    [UNW_PPC32_F12]="FPR12",
+    [UNW_PPC32_F13]="FPR13",
+    [UNW_PPC32_F14]="FPR14",
+    [UNW_PPC32_F15]="FPR15",
+    [UNW_PPC32_F16]="FPR16",
+    [UNW_PPC32_F17]="FPR17",
+    [UNW_PPC32_F18]="FPR18",
+    [UNW_PPC32_F19]="FPR19",
+    [UNW_PPC32_F20]="FPR20",
+    [UNW_PPC32_F21]="FPR21",
+    [UNW_PPC32_F22]="FPR22",
+    [UNW_PPC32_F23]="FPR23",
+    [UNW_PPC32_F24]="FPR24",
+    [UNW_PPC32_F25]="FPR25",
+    [UNW_PPC32_F26]="FPR26",
+    [UNW_PPC32_F27]="FPR27",
+    [UNW_PPC32_F28]="FPR28",
+    [UNW_PPC32_F29]="FPR29",
+    [UNW_PPC32_F30]="FPR30",
+    [UNW_PPC32_F31]="FPR31"
+};
+
+const char *
+unw_regname (unw_regnum_t reg)
+{
+  if (reg < (unw_regnum_t) ARRAY_SIZE (regname))
+    return regname[reg];
+  else
+    return "???";
+}
diff --git a/src/third_party/unwind/dist/src/ppc32/ucontext_i.h b/src/third_party/unwind/dist/src/ppc32/ucontext_i.h
new file mode 100644
index 00000000000..c6ba806a00c
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc32/ucontext_i.h
@@ -0,0 +1,128 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef ucontext_i_h
+#define ucontext_i_h
+
+#include "compiler.h"
+#include <ucontext.h>
+
+/* These values were derived by reading
+   /usr/src/linux-2.6.18-1.8/arch/um/include/sysdep-ppc/ptrace.h and
+   /usr/src/linux-2.6.18-1.8/arch/powerpc/kernel/ppc32.h
+*/
+
+//#define NIP_IDX               32
+#define CTR_IDX         32
+#define XER_IDX         33
+#define CCR_IDX         34
+#define MSR_IDX         35
+//#define MQ_IDX                36
+#define LINK_IDX        36
+
+/* These are dummy structures used only for obtaining the offsets of the
+   various structure members. */
+static ucontext_t dmy_ctxt UNUSED;
+
+#define UC_MCONTEXT_GREGS_R0 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[0] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R1 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[1] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R2 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[2] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R3 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[3] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R4 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[4] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R5 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[5] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R6 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[6] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R7 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[7] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R8 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[8] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R9 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[9] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R10 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[10] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R11 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[11] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R12 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[12] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R13 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[13] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R14 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[14] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R15 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[15] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R16 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[16] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R17 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[17] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R18 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[18] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R19 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[19] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R20 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[20] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R21 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[21] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R22 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[22] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R23 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[23] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R24 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[24] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R25 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[25] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R26 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[26] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R27 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[27] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R28 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[28] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R29 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[29] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R30 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[30] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R31 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[31] - (void *)&dmy_ctxt)
+
+#define UC_MCONTEXT_GREGS_MSR ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[MSR_IDX] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_ORIG_GPR3 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[ORIG_GPR3_IDX] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_CTR ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[CTR_IDX] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_LINK ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[LINK_IDX] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_XER ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[XER_IDX] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_CCR ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[CCR_IDX] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_SOFTE ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[SOFTE_IDX] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_TRAP ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[TRAP_IDX] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_DAR ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[DAR_IDX] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_DSISR ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[DSISR_IDX] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_RESULT ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[RESULT_IDX] - (void *)&dmy_ctxt)
+
+#define UC_MCONTEXT_FREGS_R0 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[0] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R1 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[1] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R2 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[2] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R3 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[3] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R4 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[4] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R5 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[5] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R6 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[6] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R7 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[7] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R8 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[8] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R9 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[9] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R10 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[10] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R11 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[11] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R12 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[12] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R13 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[13] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R14 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[14] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R15 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[15] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R16 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[16] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R17 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[17] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R18 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[18] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R19 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[19] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R20 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[20] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R21 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[21] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R22 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[22] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R23 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[23] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R24 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[24] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R25 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[25] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R26 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[26] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R27 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[27] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R28 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[28] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R29 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[29] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R30 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[30] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R31 ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[31] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_FPSCR ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[32] - (void *)&dmy_ctxt)
+
+#endif
diff --git a/src/third_party/unwind/dist/src/ppc32/unwind_i.h b/src/third_party/unwind/dist/src/ppc32/unwind_i.h
new file mode 100644
index 00000000000..ad32d056544
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc32/unwind_i.h
@@ -0,0 +1,46 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef unwind_i_h
+#define unwind_i_h
+
+#include <stdint.h>
+
+#include <libunwind-ppc32.h>
+
+#include <libunwind_i.h>
+#include <sys/ucontext.h>
+
+#define ppc32_lock                      UNW_OBJ(lock)
+#define ppc32_local_resume              UNW_OBJ(local_resume)
+#define ppc32_local_addr_space_init     UNW_OBJ(local_addr_space_init)
+
+extern void ppc32_local_addr_space_init (void);
+extern int ppc32_local_resume (unw_addr_space_t as, unw_cursor_t *cursor,
+                             void *arg);
+
+#endif /* unwind_i_h */
diff --git a/src/third_party/unwind/dist/src/ppc64/Gapply_reg_state.c b/src/third_party/unwind/dist/src/ppc64/Gapply_reg_state.c
new file mode 100644
index 00000000000..82f056da67e
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc64/Gapply_reg_state.c
@@ -0,0 +1,37 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_apply_reg_state (unw_cursor_t *cursor,
+		     void *reg_states_data)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  return dwarf_apply_reg_state (&c->dwarf, (dwarf_reg_state_t *)reg_states_data);
+}
diff --git a/src/third_party/unwind/dist/src/ppc64/Gcreate_addr_space.c b/src/third_party/unwind/dist/src/ppc64/Gcreate_addr_space.c
new file mode 100644
index 00000000000..bd48555d4e8
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc64/Gcreate_addr_space.c
@@ -0,0 +1,71 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <stdlib.h>
+
+#include <libunwind_i.h>
+
+unw_addr_space_t
+unw_create_addr_space (unw_accessors_t *a, int byte_order)
+{
+#ifdef UNW_LOCAL_ONLY
+  return NULL;
+#else
+  unw_addr_space_t as;
+
+  /*
+   * We support both big- and little-endian on Linux ppc64.
+   */
+  if (byte_order != 0
+      && byte_order != __LITTLE_ENDIAN
+      && byte_order != __BIG_ENDIAN)
+    return NULL;
+
+  as = malloc (sizeof (*as));
+  if (!as)
+    return NULL;
+
+  memset (as, 0, sizeof (*as));
+
+  as->acc = *a;
+
+  if (byte_order == 0)
+    /* use host default: */
+    as->big_endian = (__BYTE_ORDER == __BIG_ENDIAN);
+  else
+    as->big_endian = (byte_order == __BIG_ENDIAN);
+
+  /* FIXME!  There is no way to specify the ABI.
+     Default to ELFv1 on big-endian and ELFv2 on little-endian.  */
+  if (as->big_endian)
+    as->abi = UNW_PPC64_ABI_ELFv1;
+  else
+    as->abi = UNW_PPC64_ABI_ELFv2;
+
+  return as;
+#endif
+}
diff --git a/src/third_party/unwind/dist/src/ppc64/Gglobal.c b/src/third_party/unwind/dist/src/ppc64/Gglobal.c
new file mode 100644
index 00000000000..9d0b0f55a6c
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc64/Gglobal.c
@@ -0,0 +1,182 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "dwarf_i.h"
+
+HIDDEN define_lock (ppc64_lock);
+HIDDEN int tdep_init_done;
+
+/* The API register numbers are exactly the same as the .eh_frame
+   registers, for now at least.  */
+HIDDEN const uint8_t dwarf_to_unw_regnum_map[DWARF_REGNUM_MAP_LENGTH] =
+  {
+        [UNW_PPC64_R0]=UNW_PPC64_R0,
+        [UNW_PPC64_R1]=UNW_PPC64_R1,
+        [UNW_PPC64_R2]=UNW_PPC64_R2,
+        [UNW_PPC64_R3]=UNW_PPC64_R3,
+        [UNW_PPC64_R4]=UNW_PPC64_R4,
+        [UNW_PPC64_R5]=UNW_PPC64_R5,
+        [UNW_PPC64_R6]=UNW_PPC64_R6,
+        [UNW_PPC64_R7]=UNW_PPC64_R7,
+        [UNW_PPC64_R8]=UNW_PPC64_R8,
+        [UNW_PPC64_R9]=UNW_PPC64_R9,
+        [UNW_PPC64_R10]=UNW_PPC64_R10,
+        [UNW_PPC64_R11]=UNW_PPC64_R11,
+        [UNW_PPC64_R12]=UNW_PPC64_R12,
+        [UNW_PPC64_R13]=UNW_PPC64_R13,
+        [UNW_PPC64_R14]=UNW_PPC64_R14,
+        [UNW_PPC64_R15]=UNW_PPC64_R15,
+        [UNW_PPC64_R16]=UNW_PPC64_R16,
+        [UNW_PPC64_R17]=UNW_PPC64_R17,
+        [UNW_PPC64_R18]=UNW_PPC64_R18,
+        [UNW_PPC64_R19]=UNW_PPC64_R19,
+        [UNW_PPC64_R20]=UNW_PPC64_R20,
+        [UNW_PPC64_R21]=UNW_PPC64_R21,
+        [UNW_PPC64_R22]=UNW_PPC64_R22,
+        [UNW_PPC64_R23]=UNW_PPC64_R23,
+        [UNW_PPC64_R24]=UNW_PPC64_R24,
+        [UNW_PPC64_R25]=UNW_PPC64_R25,
+        [UNW_PPC64_R26]=UNW_PPC64_R26,
+        [UNW_PPC64_R27]=UNW_PPC64_R27,
+        [UNW_PPC64_R28]=UNW_PPC64_R28,
+        [UNW_PPC64_R29]=UNW_PPC64_R29,
+        [UNW_PPC64_R30]=UNW_PPC64_R30,
+        [UNW_PPC64_R31]=UNW_PPC64_R31,
+
+        [UNW_PPC64_F0]=UNW_PPC64_F0,
+        [UNW_PPC64_F1]=UNW_PPC64_F1,
+        [UNW_PPC64_F2]=UNW_PPC64_F2,
+        [UNW_PPC64_F3]=UNW_PPC64_F3,
+        [UNW_PPC64_F4]=UNW_PPC64_F4,
+        [UNW_PPC64_F5]=UNW_PPC64_F5,
+        [UNW_PPC64_F6]=UNW_PPC64_F6,
+        [UNW_PPC64_F7]=UNW_PPC64_F7,
+        [UNW_PPC64_F8]=UNW_PPC64_F8,
+        [UNW_PPC64_F9]=UNW_PPC64_F9,
+        [UNW_PPC64_F10]=UNW_PPC64_F10,
+        [UNW_PPC64_F11]=UNW_PPC64_F11,
+        [UNW_PPC64_F12]=UNW_PPC64_F12,
+        [UNW_PPC64_F13]=UNW_PPC64_F13,
+        [UNW_PPC64_F14]=UNW_PPC64_F14,
+        [UNW_PPC64_F15]=UNW_PPC64_F15,
+        [UNW_PPC64_F16]=UNW_PPC64_F16,
+        [UNW_PPC64_F17]=UNW_PPC64_F17,
+        [UNW_PPC64_F18]=UNW_PPC64_F18,
+        [UNW_PPC64_F19]=UNW_PPC64_F19,
+        [UNW_PPC64_F20]=UNW_PPC64_F20,
+        [UNW_PPC64_F21]=UNW_PPC64_F21,
+        [UNW_PPC64_F22]=UNW_PPC64_F22,
+        [UNW_PPC64_F23]=UNW_PPC64_F23,
+        [UNW_PPC64_F24]=UNW_PPC64_F24,
+        [UNW_PPC64_F25]=UNW_PPC64_F25,
+        [UNW_PPC64_F26]=UNW_PPC64_F26,
+        [UNW_PPC64_F27]=UNW_PPC64_F27,
+        [UNW_PPC64_F28]=UNW_PPC64_F28,
+        [UNW_PPC64_F29]=UNW_PPC64_F29,
+        [UNW_PPC64_F30]=UNW_PPC64_F30,
+        [UNW_PPC64_F31]=UNW_PPC64_F31,
+
+        [UNW_PPC64_LR]=UNW_PPC64_LR,
+        [UNW_PPC64_CTR]=UNW_PPC64_CTR,
+        [UNW_PPC64_ARG_POINTER]=UNW_PPC64_ARG_POINTER,
+
+        [UNW_PPC64_CR0]=UNW_PPC64_CR0,
+        [UNW_PPC64_CR1]=UNW_PPC64_CR1,
+        [UNW_PPC64_CR2]=UNW_PPC64_CR2,
+        [UNW_PPC64_CR3]=UNW_PPC64_CR3,
+        [UNW_PPC64_CR4]=UNW_PPC64_CR4,
+        [UNW_PPC64_CR5]=UNW_PPC64_CR5,
+        [UNW_PPC64_CR6]=UNW_PPC64_CR6,
+        [UNW_PPC64_CR7]=UNW_PPC64_CR7,
+
+        [UNW_PPC64_XER]=UNW_PPC64_XER,
+
+        [UNW_PPC64_V0]=UNW_PPC64_V0,
+        [UNW_PPC64_V1]=UNW_PPC64_V1,
+        [UNW_PPC64_V2]=UNW_PPC64_V2,
+        [UNW_PPC64_V3]=UNW_PPC64_V3,
+        [UNW_PPC64_V4]=UNW_PPC64_V4,
+        [UNW_PPC64_V5]=UNW_PPC64_V5,
+        [UNW_PPC64_V6]=UNW_PPC64_V6,
+        [UNW_PPC64_V7]=UNW_PPC64_V7,
+        [UNW_PPC64_V8]=UNW_PPC64_V8,
+        [UNW_PPC64_V9]=UNW_PPC64_V9,
+        [UNW_PPC64_V10]=UNW_PPC64_V10,
+        [UNW_PPC64_V11]=UNW_PPC64_V11,
+        [UNW_PPC64_V12]=UNW_PPC64_V12,
+        [UNW_PPC64_V13]=UNW_PPC64_V13,
+        [UNW_PPC64_V14]=UNW_PPC64_V14,
+        [UNW_PPC64_V15]=UNW_PPC64_V15,
+        [UNW_PPC64_V16]=UNW_PPC64_V16,
+        [UNW_PPC64_V17]=UNW_PPC64_V17,
+        [UNW_PPC64_V18]=UNW_PPC64_V18,
+        [UNW_PPC64_V19]=UNW_PPC64_V19,
+        [UNW_PPC64_V20]=UNW_PPC64_V20,
+        [UNW_PPC64_V21]=UNW_PPC64_V21,
+        [UNW_PPC64_V22]=UNW_PPC64_V22,
+        [UNW_PPC64_V23]=UNW_PPC64_V23,
+        [UNW_PPC64_V24]=UNW_PPC64_V24,
+        [UNW_PPC64_V25]=UNW_PPC64_V25,
+        [UNW_PPC64_V26]=UNW_PPC64_V26,
+        [UNW_PPC64_V27]=UNW_PPC64_V27,
+        [UNW_PPC64_V28]=UNW_PPC64_V28,
+        [UNW_PPC64_V29]=UNW_PPC64_V29,
+        [UNW_PPC64_V30]=UNW_PPC64_V30,
+        [UNW_PPC64_V31]=UNW_PPC64_V31,
+
+        [UNW_PPC64_VRSAVE]=UNW_PPC64_VRSAVE,
+        [UNW_PPC64_VSCR]=UNW_PPC64_VSCR,
+        [UNW_PPC64_SPE_ACC]=UNW_PPC64_SPE_ACC,
+        [UNW_PPC64_SPEFSCR]=UNW_PPC64_SPEFSCR,
+  };
+
+HIDDEN void
+tdep_init (void)
+{
+  intrmask_t saved_mask;
+
+  sigfillset (&unwi_full_mask);
+
+  lock_acquire (&ppc64_lock, saved_mask);
+  {
+    if (tdep_init_done)
+      /* another thread else beat us to it... */
+      goto out;
+
+    mi_init ();
+
+    dwarf_init ();
+
+#ifndef UNW_REMOTE_ONLY
+    ppc64_local_addr_space_init ();
+#endif
+    tdep_init_done = 1; /* signal that we're initialized... */
+  }
+ out:
+  lock_release (&ppc64_lock, saved_mask);
+}
diff --git a/src/third_party/unwind/dist/src/ppc64/Ginit.c b/src/third_party/unwind/dist/src/ppc64/Ginit.c
new file mode 100644
index 00000000000..4c88cd6e77f
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc64/Ginit.c
@@ -0,0 +1,229 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "ucontext_i.h"
+#include "unwind_i.h"
+
+#ifdef UNW_REMOTE_ONLY
+
+/* unw_local_addr_space is a NULL pointer in this case.  */
+unw_addr_space_t unw_local_addr_space;
+
+#else /* !UNW_REMOTE_ONLY */
+
+static struct unw_addr_space local_addr_space;
+
+unw_addr_space_t unw_local_addr_space = &local_addr_space;
+
+static void *
+uc_addr (ucontext_t *uc, int reg)
+{
+  void *addr;
+
+  if ((unsigned) (reg - UNW_PPC64_R0) < 32)
+    addr = &uc->uc_mcontext.gp_regs[reg - UNW_PPC64_R0];
+
+  else if ((unsigned) (reg - UNW_PPC64_F0) < 32)
+    addr = &uc->uc_mcontext.fp_regs[reg - UNW_PPC64_F0];
+
+  else if ((unsigned) (reg - UNW_PPC64_V0) < 32)
+    addr = (uc->uc_mcontext.v_regs == 0) ? NULL : &uc->uc_mcontext.v_regs->vrregs[reg - UNW_PPC64_V0][0];
+
+  else
+    {
+      unsigned gregs_idx;
+
+      switch (reg)
+        {
+        case UNW_PPC64_NIP:
+          gregs_idx = NIP_IDX;
+          break;
+        case UNW_PPC64_CTR:
+          gregs_idx = CTR_IDX;
+          break;
+        case UNW_PPC64_LR:
+          gregs_idx = LINK_IDX;
+          break;
+        case UNW_PPC64_XER:
+          gregs_idx = XER_IDX;
+          break;
+        case UNW_PPC64_CR0:
+          gregs_idx = CCR_IDX;
+          break;
+        default:
+          return NULL;
+        }
+      addr = &uc->uc_mcontext.gp_regs[gregs_idx];
+    }
+  return addr;
+}
+
+# ifdef UNW_LOCAL_ONLY
+
+HIDDEN void *
+tdep_uc_addr (ucontext_t *uc, int reg)
+{
+  return uc_addr (uc, reg);
+}
+
+# endif /* UNW_LOCAL_ONLY */
+
+HIDDEN unw_dyn_info_list_t _U_dyn_info_list;
+
+
+static void
+put_unwind_info (unw_addr_space_t as, unw_proc_info_t *proc_info, void *arg)
+{
+  /* it's a no-op */
+}
+
+static int
+get_dyn_info_list_addr (unw_addr_space_t as, unw_word_t *dyn_info_list_addr,
+                        void *arg)
+{
+  *dyn_info_list_addr = (unw_word_t) &_U_dyn_info_list;
+  return 0;
+}
+
+static int
+access_mem (unw_addr_space_t as, unw_word_t addr, unw_word_t *val, int write,
+            void *arg)
+{
+  if (write)
+    {
+      Debug (12, "mem[%lx] <- %lx\n", addr, *val);
+      *(unw_word_t *) addr = *val;
+    }
+  else
+    {
+      *val = *(unw_word_t *) addr;
+      Debug (12, "mem[%lx] -> %lx\n", addr, *val);
+    }
+  return 0;
+}
+
+static int
+access_reg (unw_addr_space_t as, unw_regnum_t reg, unw_word_t *val,
+            int write, void *arg)
+{
+  unw_word_t *addr;
+  ucontext_t *uc = arg;
+
+  if (UNW_PPC64_F0 <= reg && reg <= UNW_PPC64_F31)
+    goto badreg;
+  if (UNW_PPC64_V0 <= reg && reg <= UNW_PPC64_V31)
+    goto badreg;
+
+  addr = uc_addr (uc, reg);
+  if (!addr)
+    goto badreg;
+
+  if (write)
+    {
+      *(unw_word_t *) addr = *val;
+      Debug (12, "%s <- %lx\n", unw_regname (reg), *val);
+    }
+  else
+    {
+      *val = *(unw_word_t *) addr;
+      Debug (12, "%s -> %lx\n", unw_regname (reg), *val);
+    }
+  return 0;
+
+badreg:
+  Debug (1, "bad register number %u\n", reg);
+  return -UNW_EBADREG;
+}
+
+static int
+access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val,
+              int write, void *arg)
+{
+  ucontext_t *uc = arg;
+  unw_fpreg_t *addr;
+
+  /* Allow only 32 fregs and 32 vregs */
+  if (!(((unsigned) (reg - UNW_PPC64_F0) < 32)
+	||((unsigned) (reg - UNW_PPC64_V0) < 32)))
+    goto badreg;
+
+  addr = uc_addr (uc, reg);
+  if (!addr)
+    goto badreg;
+
+  if (write)
+    {
+      Debug (12, "%s <- %016Lf\n", unw_regname (reg), *val);
+      *(unw_fpreg_t *) addr = *val;
+    }
+  else
+    {
+      *val = *(unw_fpreg_t *) addr;
+      Debug (12, "%s -> %016Lf\n", unw_regname (reg), *val);
+    }
+  return 0;
+
+badreg:
+  Debug (1, "bad register number %u\n", reg);
+  /* attempt to access a non-preserved register */
+  return -UNW_EBADREG;
+}
+
+static int
+get_static_proc_name (unw_addr_space_t as, unw_word_t ip,
+                      char *buf, size_t buf_len, unw_word_t *offp,
+                      void *arg)
+{
+  return _Uelf64_get_proc_name (as, getpid (), ip, buf, buf_len, offp);
+}
+
+HIDDEN void
+ppc64_local_addr_space_init (void)
+{
+  memset (&local_addr_space, 0, sizeof (local_addr_space));
+  local_addr_space.big_endian = (__BYTE_ORDER == __BIG_ENDIAN);
+#if _CALL_ELF == 2
+  local_addr_space.abi = UNW_PPC64_ABI_ELFv2;
+#else
+  local_addr_space.abi = UNW_PPC64_ABI_ELFv1;
+#endif
+  local_addr_space.caching_policy = UNWI_DEFAULT_CACHING_POLICY;
+  local_addr_space.acc.find_proc_info = dwarf_find_proc_info;
+  local_addr_space.acc.put_unwind_info = put_unwind_info;
+  local_addr_space.acc.get_dyn_info_list_addr = get_dyn_info_list_addr;
+  local_addr_space.acc.access_mem = access_mem;
+  local_addr_space.acc.access_reg = access_reg;
+  local_addr_space.acc.access_fpreg = access_fpreg;
+  local_addr_space.acc.resume = ppc64_local_resume;
+  local_addr_space.acc.get_proc_name = get_static_proc_name;
+  unw_flush_cache (&local_addr_space, 0, 0);
+}
+
+#endif /* !UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/dist/src/ppc64/Greg_states_iterate.c b/src/third_party/unwind/dist/src/ppc64/Greg_states_iterate.c
new file mode 100644
index 00000000000..a17dc1b561d
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc64/Greg_states_iterate.c
@@ -0,0 +1,37 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_reg_states_iterate (unw_cursor_t *cursor,
+			unw_reg_states_callback cb, void *token)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  return dwarf_reg_states_iterate (&c->dwarf, cb, token);
+}
diff --git a/src/third_party/unwind/dist/src/ppc64/Gregs.c b/src/third_party/unwind/dist/src/ppc64/Gregs.c
new file mode 100644
index 00000000000..1cb5d9dc653
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc64/Gregs.c
@@ -0,0 +1,141 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+HIDDEN int
+tdep_access_reg (struct cursor *c, unw_regnum_t reg, unw_word_t *valp,
+                 int write)
+{
+  struct dwarf_loc loc;
+
+  switch (reg)
+    {
+    case UNW_PPC64_R0:
+    case UNW_PPC64_R2:
+    case UNW_PPC64_R3:
+    case UNW_PPC64_R4:
+    case UNW_PPC64_R5:
+    case UNW_PPC64_R6:
+    case UNW_PPC64_R7:
+    case UNW_PPC64_R8:
+    case UNW_PPC64_R9:
+    case UNW_PPC64_R10:
+    case UNW_PPC64_R11:
+    case UNW_PPC64_R12:
+    case UNW_PPC64_R13:
+    case UNW_PPC64_R14:
+    case UNW_PPC64_R15:
+    case UNW_PPC64_R16:
+    case UNW_PPC64_R17:
+    case UNW_PPC64_R18:
+    case UNW_PPC64_R19:
+    case UNW_PPC64_R20:
+    case UNW_PPC64_R21:
+    case UNW_PPC64_R22:
+    case UNW_PPC64_R23:
+    case UNW_PPC64_R24:
+    case UNW_PPC64_R25:
+    case UNW_PPC64_R26:
+    case UNW_PPC64_R27:
+    case UNW_PPC64_R28:
+    case UNW_PPC64_R29:
+    case UNW_PPC64_R30:
+    case UNW_PPC64_R31:
+    case UNW_PPC64_LR:
+    case UNW_PPC64_CTR:
+    case UNW_PPC64_CR0:
+    case UNW_PPC64_CR1:
+    case UNW_PPC64_CR2:
+    case UNW_PPC64_CR3:
+    case UNW_PPC64_CR4:
+    case UNW_PPC64_CR5:
+    case UNW_PPC64_CR6:
+    case UNW_PPC64_CR7:
+    case UNW_PPC64_VRSAVE:
+    case UNW_PPC64_VSCR:
+    case UNW_PPC64_SPE_ACC:
+    case UNW_PPC64_SPEFSCR:
+      loc = c->dwarf.loc[reg];
+      break;
+
+    case UNW_TDEP_IP:
+      if (write)
+        {
+          c->dwarf.ip = *valp;  /* update the IP cache */
+          if (c->dwarf.pi_valid && (*valp < c->dwarf.pi.start_ip
+                                    || *valp >= c->dwarf.pi.end_ip))
+            c->dwarf.pi_valid = 0;      /* new IP outside of current proc */
+        }
+      else
+        *valp = c->dwarf.ip;
+      return 0;
+
+    case UNW_TDEP_SP:
+      if (write)
+        return -UNW_EREADONLYREG;
+      *valp = c->dwarf.cfa;
+      return 0;
+
+    default:
+      return -UNW_EBADREG;
+      break;
+    }
+
+  if (write)
+    return dwarf_put (&c->dwarf, loc, *valp);
+  else
+    return dwarf_get (&c->dwarf, loc, valp);
+}
+
+HIDDEN int
+tdep_access_fpreg (struct cursor *c, unw_regnum_t reg, unw_fpreg_t *valp,
+                   int write)
+{
+  struct dwarf_loc loc;
+
+  if ((unsigned) (reg - UNW_PPC64_F0) < 32)
+  {
+    loc = c->dwarf.loc[reg];
+    if (write)
+      return dwarf_putfp (&c->dwarf, loc, *valp);
+    else
+      return dwarf_getfp (&c->dwarf, loc, valp);
+  }
+  else
+  if ((unsigned) (reg - UNW_PPC64_V0) < 32)
+  {
+    loc = c->dwarf.loc[reg];
+    if (write)
+      return dwarf_putvr (&c->dwarf, loc, *valp);
+    else
+      return dwarf_getvr (&c->dwarf, loc, valp);
+  }
+
+  return -UNW_EBADREG;
+}
+
diff --git a/src/third_party/unwind/dist/src/ppc64/Gresume.c b/src/third_party/unwind/dist/src/ppc64/Gresume.c
new file mode 100644
index 00000000000..0d832d0d97b
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc64/Gresume.c
@@ -0,0 +1,111 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford cjashfor@us.ibm.com
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <stdlib.h>
+
+#include "unwind_i.h"
+
+#ifndef UNW_REMOTE_ONLY
+
+#include <sys/syscall.h>
+
+/* sigreturn() is a no-op on x86_64 glibc.  */
+
+static NORETURN inline long
+my_rt_sigreturn (void *new_sp)
+{
+  /* XXX: empty stub.  */
+  abort ();
+}
+
+HIDDEN inline int
+ppc64_local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  ucontext_t *uc = (ucontext_t *)c->dwarf.as_arg;
+
+  if (unlikely (c->sigcontext_format != PPC_SCF_NONE))
+    {
+      my_rt_sigreturn(cursor);
+      abort();
+    }
+  else
+    {
+      Debug (8, "resuming at ip=%llx via setcontext()\n",
+            (unsigned long long) c->dwarf.ip);
+      setcontext (uc);
+    }
+  return -UNW_EINVAL;
+}
+
+#endif /* !UNW_REMOTE_ONLY */
+
+/* This routine is responsible for copying the register values in
+   cursor C and establishing them as the current machine state. */
+
+static inline int
+establish_machine_state (struct cursor *c)
+{
+  unw_addr_space_t as = c->dwarf.as;
+  void *arg = c->dwarf.as_arg;
+  unw_fpreg_t fpval;
+  unw_word_t val;
+  int reg;
+
+  Debug (8, "copying out cursor state\n");
+
+  for (reg = 0; reg <= UNW_REG_LAST; ++reg)
+    {
+      Debug (16, "copying %s %d\n", unw_regname (reg), reg);
+      if (unw_is_fpreg (reg))
+        {
+          if (tdep_access_fpreg (c, reg, &fpval, 0) >= 0)
+            as->acc.access_fpreg (as, reg, &fpval, 1, arg);
+        }
+      else
+        {
+          if (tdep_access_reg (c, reg, &val, 0) >= 0)
+            as->acc.access_reg (as, reg, &val, 1, arg);
+        }
+    }
+  return 0;
+}
+
+int
+unw_resume (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  int ret;
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  if ((ret = establish_machine_state (c)) < 0)
+    return ret;
+
+  return (*c->dwarf.as->acc.resume) (c->dwarf.as, (unw_cursor_t *) c,
+                                     c->dwarf.as_arg);
+}
diff --git a/src/third_party/unwind/dist/src/ppc64/Gstep.c b/src/third_party/unwind/dist/src/ppc64/Gstep.c
new file mode 100644
index 00000000000..f44e9591054
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc64/Gstep.c
@@ -0,0 +1,466 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "ucontext_i.h"
+#include "remote.h"
+#include <signal.h>
+
+/* This definition originates in /usr/include/asm-ppc64/ptrace.h, but is
+   defined there only when __KERNEL__ is defined.  We reproduce it here for
+   our use at the user level in order to locate the ucontext record, which
+   appears to be at this offset relative to the stack pointer when in the
+   context of the signal handler return trampoline code -
+   __kernel_sigtramp_rt64.  */
+#define __SIGNAL_FRAMESIZE 128
+
+/* This definition comes from the document "64-bit PowerPC ELF Application
+   Binary Interface Supplement 1.9", section 3.2.2.
+   http://www.linux-foundation.org/spec/ELF/ppc64/PPC-elf64abi-1.9.html#STACK */
+
+typedef struct
+{
+  long unsigned back_chain;
+  long unsigned cr_save;
+  long unsigned lr_save;
+  /* many more fields here, but they are unused by this code */
+} stack_frame_t;
+
+
+int
+unw_step (unw_cursor_t * cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  stack_frame_t dummy;
+  unw_word_t back_chain_offset, lr_save_offset, v_regs_ptr;
+  struct dwarf_loc back_chain_loc, lr_save_loc, sp_loc, ip_loc, v_regs_loc;
+  int ret, i;
+
+  Debug (1, "(cursor=%p, ip=0x%016lx)\n", c, (unsigned long) c->dwarf.ip);
+
+  /* Try DWARF-based unwinding... */
+
+  ret = dwarf_step (&c->dwarf);
+
+  if (ret < 0 && ret != -UNW_ENOINFO)
+    {
+      Debug (2, "returning %d\n", ret);
+      return ret;
+    }
+
+  if (unlikely (ret < 0))
+    {
+      if (likely (unw_is_signal_frame (cursor) <= 0))
+        {
+          /* DWARF unwinding failed.  As of 09/26/2006, gcc in 64-bit mode
+             produces the mandatory level of traceback record in the code, but
+             I get the impression that this is transitory, that eventually gcc
+             will not produce any traceback records at all.  So, for now, we
+             won't bother to try to find and use these records.
+
+             We can, however, attempt to unwind the frame by using the callback
+             chain.  This is very crude, however, and won't be able to unwind
+             any registers besides the IP, SP, and LR . */
+
+          back_chain_offset = ((void *) &dummy.back_chain - (void *) &dummy);
+          lr_save_offset = ((void *) &dummy.lr_save - (void *) &dummy);
+
+          back_chain_loc = DWARF_LOC (c->dwarf.cfa + back_chain_offset, 0);
+
+          if ((ret =
+               dwarf_get (&c->dwarf, back_chain_loc, &c->dwarf.cfa)) < 0)
+            {
+              Debug (2,
+                 "Unable to retrieve CFA from back chain in stack frame - %d\n",
+                 ret);
+              return ret;
+            }
+          if (c->dwarf.cfa == 0)
+            /* Unless the cursor or stack is corrupt or uninitialized we've most
+               likely hit the top of the stack */
+            return 0;
+
+          lr_save_loc = DWARF_LOC (c->dwarf.cfa + lr_save_offset, 0);
+
+          if ((ret = dwarf_get (&c->dwarf, lr_save_loc, &c->dwarf.ip)) < 0)
+            {
+              Debug (2,
+                 "Unable to retrieve IP from lr save in stack frame - %d\n",
+                 ret);
+              return ret;
+            }
+
+          /* Mark all registers unsaved */
+          for (i = 0; i < DWARF_NUM_PRESERVED_REGS; ++i)
+            c->dwarf.loc[i] = DWARF_NULL_LOC;
+
+          ret = 1;
+        }
+      else
+        {
+          /* Find the sigcontext record by taking the CFA and adjusting by
+             the dummy signal frame size.
+
+             Note that there isn't any way to determined if SA_SIGINFO was
+             set in the sa_flags parameter to sigaction when the signal
+             handler was established.  If it was not set, the ucontext
+             record is not required to be on the stack, in which case the
+             following code will likely cause a seg fault or other crash
+             condition.  */
+
+          unw_word_t ucontext = c->dwarf.cfa + __SIGNAL_FRAMESIZE;
+
+          Debug (1, "signal frame, skip over trampoline\n");
+
+          c->sigcontext_format = PPC_SCF_LINUX_RT_SIGFRAME;
+          c->sigcontext_addr = ucontext;
+
+          sp_loc = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R1, 0);
+          ip_loc = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_NIP, 0);
+
+          ret = dwarf_get (&c->dwarf, sp_loc, &c->dwarf.cfa);
+          if (ret < 0)
+            {
+              Debug (2, "returning %d\n", ret);
+              return ret;
+            }
+          ret = dwarf_get (&c->dwarf, ip_loc, &c->dwarf.ip);
+          if (ret < 0)
+            {
+              Debug (2, "returning %d\n", ret);
+              return ret;
+            }
+
+          /* Instead of just restoring the non-volatile registers, do all
+             of the registers for now.  This will incur a performance hit,
+             but it's rare enough not to cause too much of a problem, and
+             might be useful in some cases.  */
+          c->dwarf.loc[UNW_PPC64_R0] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R0, 0);
+          c->dwarf.loc[UNW_PPC64_R1] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R1, 0);
+          c->dwarf.loc[UNW_PPC64_R2] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R2, 0);
+          c->dwarf.loc[UNW_PPC64_R3] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R3, 0);
+          c->dwarf.loc[UNW_PPC64_R4] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R4, 0);
+          c->dwarf.loc[UNW_PPC64_R5] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R5, 0);
+          c->dwarf.loc[UNW_PPC64_R6] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R6, 0);
+          c->dwarf.loc[UNW_PPC64_R7] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R7, 0);
+          c->dwarf.loc[UNW_PPC64_R8] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R8, 0);
+          c->dwarf.loc[UNW_PPC64_R9] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R9, 0);
+          c->dwarf.loc[UNW_PPC64_R10] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R10, 0);
+          c->dwarf.loc[UNW_PPC64_R11] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R11, 0);
+          c->dwarf.loc[UNW_PPC64_R12] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R12, 0);
+          c->dwarf.loc[UNW_PPC64_R13] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R13, 0);
+          c->dwarf.loc[UNW_PPC64_R14] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R14, 0);
+          c->dwarf.loc[UNW_PPC64_R15] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R15, 0);
+          c->dwarf.loc[UNW_PPC64_R16] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R16, 0);
+          c->dwarf.loc[UNW_PPC64_R17] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R17, 0);
+          c->dwarf.loc[UNW_PPC64_R18] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R18, 0);
+          c->dwarf.loc[UNW_PPC64_R19] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R19, 0);
+          c->dwarf.loc[UNW_PPC64_R20] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R20, 0);
+          c->dwarf.loc[UNW_PPC64_R21] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R21, 0);
+          c->dwarf.loc[UNW_PPC64_R22] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R22, 0);
+          c->dwarf.loc[UNW_PPC64_R23] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R23, 0);
+          c->dwarf.loc[UNW_PPC64_R24] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R24, 0);
+          c->dwarf.loc[UNW_PPC64_R25] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R25, 0);
+          c->dwarf.loc[UNW_PPC64_R26] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R26, 0);
+          c->dwarf.loc[UNW_PPC64_R27] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R27, 0);
+          c->dwarf.loc[UNW_PPC64_R28] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R28, 0);
+          c->dwarf.loc[UNW_PPC64_R29] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R29, 0);
+          c->dwarf.loc[UNW_PPC64_R30] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R30, 0);
+          c->dwarf.loc[UNW_PPC64_R31] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R31, 0);
+
+          c->dwarf.loc[UNW_PPC64_LR] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_LINK, 0);
+          c->dwarf.loc[UNW_PPC64_CTR] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_CTR, 0);
+          /* This CR0 assignment is probably wrong.  There are 8 dwarf columns
+             assigned to the CR registers, but only one CR register in the
+             mcontext structure */
+          c->dwarf.loc[UNW_PPC64_CR0] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_CCR, 0);
+          c->dwarf.loc[UNW_PPC64_XER] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_XER, 0);
+          c->dwarf.loc[UNW_PPC64_NIP] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_NIP, 0);
+
+          /* TODO: Is there a way of obtaining the value of the
+             pseudo frame pointer (which is sp + some fixed offset, I
+             assume), based on the contents of the ucontext record
+             structure?  For now, set this loc to null. */
+          c->dwarf.loc[UNW_PPC64_FRAME_POINTER] = DWARF_NULL_LOC;
+
+          c->dwarf.loc[UNW_PPC64_F0] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R0, 0);
+          c->dwarf.loc[UNW_PPC64_F1] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R1, 0);
+          c->dwarf.loc[UNW_PPC64_F2] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R2, 0);
+          c->dwarf.loc[UNW_PPC64_F3] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R3, 0);
+          c->dwarf.loc[UNW_PPC64_F4] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R4, 0);
+          c->dwarf.loc[UNW_PPC64_F5] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R5, 0);
+          c->dwarf.loc[UNW_PPC64_F6] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R6, 0);
+          c->dwarf.loc[UNW_PPC64_F7] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R7, 0);
+          c->dwarf.loc[UNW_PPC64_F8] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R8, 0);
+          c->dwarf.loc[UNW_PPC64_F9] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R9, 0);
+          c->dwarf.loc[UNW_PPC64_F10] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R10, 0);
+          c->dwarf.loc[UNW_PPC64_F11] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R11, 0);
+          c->dwarf.loc[UNW_PPC64_F12] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R12, 0);
+          c->dwarf.loc[UNW_PPC64_F13] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R13, 0);
+          c->dwarf.loc[UNW_PPC64_F14] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R14, 0);
+          c->dwarf.loc[UNW_PPC64_F15] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R15, 0);
+          c->dwarf.loc[UNW_PPC64_F16] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R16, 0);
+          c->dwarf.loc[UNW_PPC64_F17] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R17, 0);
+          c->dwarf.loc[UNW_PPC64_F18] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R18, 0);
+          c->dwarf.loc[UNW_PPC64_F19] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R19, 0);
+          c->dwarf.loc[UNW_PPC64_F20] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R20, 0);
+          c->dwarf.loc[UNW_PPC64_F21] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R21, 0);
+          c->dwarf.loc[UNW_PPC64_F22] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R22, 0);
+          c->dwarf.loc[UNW_PPC64_F23] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R23, 0);
+          c->dwarf.loc[UNW_PPC64_F24] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R24, 0);
+          c->dwarf.loc[UNW_PPC64_F25] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R25, 0);
+          c->dwarf.loc[UNW_PPC64_F26] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R26, 0);
+          c->dwarf.loc[UNW_PPC64_F27] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R27, 0);
+          c->dwarf.loc[UNW_PPC64_F28] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R28, 0);
+          c->dwarf.loc[UNW_PPC64_F29] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R29, 0);
+          c->dwarf.loc[UNW_PPC64_F30] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R30, 0);
+          c->dwarf.loc[UNW_PPC64_F31] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R31, 0);
+          /* Note that there is no .eh_section register column for the
+             FPSCR register.  I don't know why this is.  */
+
+          v_regs_loc = DWARF_LOC (ucontext + UC_MCONTEXT_V_REGS, 0);
+          ret = dwarf_get (&c->dwarf, v_regs_loc, &v_regs_ptr);
+          if (ret < 0)
+            {
+              Debug (2, "returning %d\n", ret);
+              return ret;
+            }
+          if (v_regs_ptr != 0)
+            {
+              /* The v_regs_ptr is not null.  Set all of the AltiVec locs */
+
+              c->dwarf.loc[UNW_PPC64_V0] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R0, 0);
+              c->dwarf.loc[UNW_PPC64_V1] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R1, 0);
+              c->dwarf.loc[UNW_PPC64_V2] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R2, 0);
+              c->dwarf.loc[UNW_PPC64_V3] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R3, 0);
+              c->dwarf.loc[UNW_PPC64_V4] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R4, 0);
+              c->dwarf.loc[UNW_PPC64_V5] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R5, 0);
+              c->dwarf.loc[UNW_PPC64_V6] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R6, 0);
+              c->dwarf.loc[UNW_PPC64_V7] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R7, 0);
+              c->dwarf.loc[UNW_PPC64_V8] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R8, 0);
+              c->dwarf.loc[UNW_PPC64_V9] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R9, 0);
+              c->dwarf.loc[UNW_PPC64_V10] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R10, 0);
+              c->dwarf.loc[UNW_PPC64_V11] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R11, 0);
+              c->dwarf.loc[UNW_PPC64_V12] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R12, 0);
+              c->dwarf.loc[UNW_PPC64_V13] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R13, 0);
+              c->dwarf.loc[UNW_PPC64_V14] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R14, 0);
+              c->dwarf.loc[UNW_PPC64_V15] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R15, 0);
+              c->dwarf.loc[UNW_PPC64_V16] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R16, 0);
+              c->dwarf.loc[UNW_PPC64_V17] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R17, 0);
+              c->dwarf.loc[UNW_PPC64_V18] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R18, 0);
+              c->dwarf.loc[UNW_PPC64_V19] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R19, 0);
+              c->dwarf.loc[UNW_PPC64_V20] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R20, 0);
+              c->dwarf.loc[UNW_PPC64_V21] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R21, 0);
+              c->dwarf.loc[UNW_PPC64_V22] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R22, 0);
+              c->dwarf.loc[UNW_PPC64_V23] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R23, 0);
+              c->dwarf.loc[UNW_PPC64_V24] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R24, 0);
+              c->dwarf.loc[UNW_PPC64_V25] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R25, 0);
+              c->dwarf.loc[UNW_PPC64_V26] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R26, 0);
+              c->dwarf.loc[UNW_PPC64_V27] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R27, 0);
+              c->dwarf.loc[UNW_PPC64_V28] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R28, 0);
+              c->dwarf.loc[UNW_PPC64_V29] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R29, 0);
+              c->dwarf.loc[UNW_PPC64_V30] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R30, 0);
+              c->dwarf.loc[UNW_PPC64_V31] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_R31, 0);
+              c->dwarf.loc[UNW_PPC64_VRSAVE] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_VRSAVE, 0);
+              c->dwarf.loc[UNW_PPC64_VSCR] =
+                DWARF_LOC (v_regs_ptr + UC_MCONTEXT_VREGS_VSCR, 0);
+            }
+          else
+            {
+              c->dwarf.loc[UNW_PPC64_V0] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_V1] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_V2] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_V3] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_V4] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_V5] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_V6] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_V7] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_V8] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_V9] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_V10] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_V11] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_V12] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_V13] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_V14] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_V15] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_V16] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_V17] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_V18] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_V19] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_V20] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_V21] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_V22] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_V23] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_V24] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_V25] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_V26] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_V27] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_V28] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_V29] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_V30] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_V31] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_VRSAVE] = DWARF_NULL_LOC;
+              c->dwarf.loc[UNW_PPC64_VSCR] = DWARF_NULL_LOC;
+            }
+          ret = 1;
+        }
+    }
+
+  if (c->dwarf.ip == 0)
+    {
+      /* Unless the cursor or stack is corrupt or uninitialized,
+         we've most likely hit the top of the stack */
+      Debug (2, "returning 0\n");
+      return 0;
+    }
+
+  // on ppc64, R2 register is used as pointer to TOC
+  // section which is used for symbol lookup in PIC code
+  // ppc64 linker generates "ld r2, 40(r1)" (ELFv1) or
+  // "ld r2, 24(r1)" (ELFv2) instruction after each
+  // @plt call. We need restore R2, but only for @plt calls
+  {
+    unw_word_t ip = c->dwarf.ip;
+    unw_addr_space_t as = c->dwarf.as;
+    unw_accessors_t *a = unw_get_accessors_int (as);
+    void *arg = c->dwarf.as_arg;
+    uint32_t toc_save = (as->abi == UNW_PPC64_ABI_ELFv2)? 24 : 40;
+    int32_t inst;
+
+    if (fetch32 (as, a, &ip, &inst, arg) >= 0
+	&& (uint32_t)inst == (0xE8410000U + toc_save))
+      {
+	// @plt call, restoring R2 from CFA+toc_save
+	c->dwarf.loc[UNW_PPC64_R2] = DWARF_LOC(c->dwarf.cfa + toc_save, 0);
+      }
+  }
+
+  Debug (2, "returning %d with last return statement\n", ret);
+  return ret;
+}
diff --git a/src/third_party/unwind/dist/src/ppc64/Lapply_reg_state.c b/src/third_party/unwind/dist/src/ppc64/Lapply_reg_state.c
new file mode 100644
index 00000000000..7ebada480e5
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc64/Lapply_reg_state.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gapply_reg_state.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ppc64/Lcreate_addr_space.c b/src/third_party/unwind/dist/src/ppc64/Lcreate_addr_space.c
new file mode 100644
index 00000000000..0f2dc6be901
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc64/Lcreate_addr_space.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gcreate_addr_space.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ppc64/Lglobal.c b/src/third_party/unwind/dist/src/ppc64/Lglobal.c
new file mode 100644
index 00000000000..6d7b489e14b
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc64/Lglobal.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gglobal.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ppc64/Linit.c b/src/third_party/unwind/dist/src/ppc64/Linit.c
new file mode 100644
index 00000000000..e9abfdd46a3
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc64/Linit.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ppc64/Lreg_states_iterate.c b/src/third_party/unwind/dist/src/ppc64/Lreg_states_iterate.c
new file mode 100644
index 00000000000..f1eb1e79dcd
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc64/Lreg_states_iterate.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Greg_states_iterate.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ppc64/Lregs.c b/src/third_party/unwind/dist/src/ppc64/Lregs.c
new file mode 100644
index 00000000000..2c9c75cd7d9
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc64/Lregs.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gregs.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ppc64/Lresume.c b/src/third_party/unwind/dist/src/ppc64/Lresume.c
new file mode 100644
index 00000000000..41a8cf003de
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc64/Lresume.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gresume.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ppc64/Lstep.c b/src/third_party/unwind/dist/src/ppc64/Lstep.c
new file mode 100644
index 00000000000..c1ac3c7547f
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc64/Lstep.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gstep.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/ppc64/get_func_addr.c b/src/third_party/unwind/dist/src/ppc64/get_func_addr.c
new file mode 100644
index 00000000000..80a58fa1f80
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc64/get_func_addr.c
@@ -0,0 +1,51 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+tdep_get_func_addr (unw_addr_space_t as, unw_word_t addr,
+                    unw_word_t *entry_point)
+{
+  if (as->abi == UNW_PPC64_ABI_ELFv1)
+    {
+      unw_accessors_t *a;
+      int ret;
+
+      a = unw_get_accessors_int (as);
+      /* Entry-point is stored in the 1st word of the function descriptor.
+         In case that changes in the future, we'd have to update the line
+         below and read the word at addr + offset: */
+      ret = (*a->access_mem) (as, addr, entry_point, 0, NULL);
+      if (ret < 0)
+        return ret;
+    }
+  else
+    *entry_point = addr;
+
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/ppc64/init.h b/src/third_party/unwind/dist/src/ppc64/init.h
new file mode 100644
index 00000000000..9b8139343d6
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc64/init.h
@@ -0,0 +1,82 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+static inline int
+common_init_ppc64 (struct cursor *c, unsigned use_prev_instr)
+{
+  int ret;
+  int i;
+
+  for (i = UNW_PPC64_R0; i <= UNW_PPC64_R31; i++) {
+    c->dwarf.loc[i] = DWARF_REG_LOC (&c->dwarf, i);
+  }
+  for (i = UNW_PPC64_F0; i <= UNW_PPC64_F31; i++) {
+    c->dwarf.loc[i] = DWARF_FPREG_LOC (&c->dwarf, i);
+  }
+  for (i = UNW_PPC64_V0; i <= UNW_PPC64_V31; i++) {
+    c->dwarf.loc[i] = DWARF_VREG_LOC (&c->dwarf, i);
+  }
+
+  for (i = UNW_PPC64_CR0; i <= UNW_PPC64_CR7; i++) {
+    c->dwarf.loc[i] = DWARF_REG_LOC (&c->dwarf, i);
+  }
+  c->dwarf.loc[UNW_PPC64_ARG_POINTER] = DWARF_REG_LOC (&c->dwarf, UNW_PPC64_ARG_POINTER);
+  c->dwarf.loc[UNW_PPC64_CTR] = DWARF_REG_LOC (&c->dwarf, UNW_PPC64_CTR);
+  c->dwarf.loc[UNW_PPC64_VSCR] = DWARF_REG_LOC (&c->dwarf, UNW_PPC64_VSCR);
+
+  c->dwarf.loc[UNW_PPC64_XER] = DWARF_REG_LOC (&c->dwarf, UNW_PPC64_XER);
+  c->dwarf.loc[UNW_PPC64_LR] = DWARF_REG_LOC (&c->dwarf, UNW_PPC64_LR);
+  c->dwarf.loc[UNW_PPC64_VRSAVE] = DWARF_REG_LOC (&c->dwarf, UNW_PPC64_VRSAVE);
+  c->dwarf.loc[UNW_PPC64_SPEFSCR] = DWARF_REG_LOC (&c->dwarf, UNW_PPC64_SPEFSCR);
+  c->dwarf.loc[UNW_PPC64_SPE_ACC] = DWARF_REG_LOC (&c->dwarf, UNW_PPC64_SPE_ACC);
+
+  c->dwarf.loc[UNW_PPC64_NIP] = DWARF_REG_LOC (&c->dwarf, UNW_PPC64_NIP);
+
+  ret = dwarf_get (&c->dwarf, c->dwarf.loc[UNW_PPC64_NIP], &c->dwarf.ip);
+  if (ret < 0)
+    return ret;
+
+  ret = dwarf_get (&c->dwarf, DWARF_REG_LOC (&c->dwarf, UNW_PPC64_R1),
+                   &c->dwarf.cfa);
+  if (ret < 0)
+    return ret;
+
+  c->sigcontext_format = PPC_SCF_NONE;
+  c->sigcontext_addr = 0;
+
+  c->dwarf.args_size = 0;
+  c->dwarf.stash_frames = 0;
+  c->dwarf.use_prev_instr = use_prev_instr;
+  c->dwarf.pi_valid = 0;
+  c->dwarf.pi_is_dynamic = 0;
+  c->dwarf.hint = 0;
+  c->dwarf.prev_rs = 0;
+
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/ppc64/is_fpreg.c b/src/third_party/unwind/dist/src/ppc64/is_fpreg.c
new file mode 100644
index 00000000000..653964a7dad
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc64/is_fpreg.c
@@ -0,0 +1,34 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "libunwind_i.h"
+
+int
+unw_is_fpreg (int regnum)
+{
+  return (regnum >= UNW_PPC64_F0 && regnum <= UNW_PPC64_F31);
+}
diff --git a/src/third_party/unwind/dist/src/ppc64/regname.c b/src/third_party/unwind/dist/src/ppc64/regname.c
new file mode 100644
index 00000000000..58c6fa6d874
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc64/regname.c
@@ -0,0 +1,164 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+static const char *regname[] =
+  {
+    [UNW_PPC64_R0]="GPR0",
+    [UNW_PPC64_R1]="GPR1",
+    [UNW_PPC64_R2]="GPR2",
+    [UNW_PPC64_R3]="GPR3",
+    [UNW_PPC64_R4]="GPR4",
+    [UNW_PPC64_R5]="GPR5",
+    [UNW_PPC64_R6]="GPR6",
+    [UNW_PPC64_R7]="GPR7",
+    [UNW_PPC64_R8]="GPR8",
+    [UNW_PPC64_R9]="GPR9",
+    [UNW_PPC64_R10]="GPR10",
+    [UNW_PPC64_R11]="GPR11",
+    [UNW_PPC64_R12]="GPR12",
+    [UNW_PPC64_R13]="GPR13",
+    [UNW_PPC64_R14]="GPR14",
+    [UNW_PPC64_R15]="GPR15",
+    [UNW_PPC64_R16]="GPR16",
+    [UNW_PPC64_R17]="GPR17",
+    [UNW_PPC64_R18]="GPR18",
+    [UNW_PPC64_R19]="GPR19",
+    [UNW_PPC64_R20]="GPR20",
+    [UNW_PPC64_R21]="GPR21",
+    [UNW_PPC64_R22]="GPR22",
+    [UNW_PPC64_R23]="GPR23",
+    [UNW_PPC64_R24]="GPR24",
+    [UNW_PPC64_R25]="GPR25",
+    [UNW_PPC64_R26]="GPR26",
+    [UNW_PPC64_R27]="GPR27",
+    [UNW_PPC64_R28]="GPR28",
+    [UNW_PPC64_R29]="GPR29",
+    [UNW_PPC64_R30]="GPR30",
+    [UNW_PPC64_R31]="GPR31",
+
+    [UNW_PPC64_F0]="FPR0",
+    [UNW_PPC64_F1]="FPR1",
+    [UNW_PPC64_F2]="FPR2",
+    [UNW_PPC64_F3]="FPR3",
+    [UNW_PPC64_F4]="FPR4",
+    [UNW_PPC64_F5]="FPR5",
+    [UNW_PPC64_F6]="FPR6",
+    [UNW_PPC64_F7]="FPR7",
+    [UNW_PPC64_F8]="FPR8",
+    [UNW_PPC64_F9]="FPR9",
+    [UNW_PPC64_F10]="FPR10",
+    [UNW_PPC64_F11]="FPR11",
+    [UNW_PPC64_F12]="FPR12",
+    [UNW_PPC64_F13]="FPR13",
+    [UNW_PPC64_F14]="FPR14",
+    [UNW_PPC64_F15]="FPR15",
+    [UNW_PPC64_F16]="FPR16",
+    [UNW_PPC64_F17]="FPR17",
+    [UNW_PPC64_F18]="FPR18",
+    [UNW_PPC64_F19]="FPR19",
+    [UNW_PPC64_F20]="FPR20",
+    [UNW_PPC64_F21]="FPR21",
+    [UNW_PPC64_F22]="FPR22",
+    [UNW_PPC64_F23]="FPR23",
+    [UNW_PPC64_F24]="FPR24",
+    [UNW_PPC64_F25]="FPR25",
+    [UNW_PPC64_F26]="FPR26",
+    [UNW_PPC64_F27]="FPR27",
+    [UNW_PPC64_F28]="FPR28",
+    [UNW_PPC64_F29]="FPR29",
+    [UNW_PPC64_F30]="FPR30",
+    [UNW_PPC64_F31]="FPR31",
+
+    [UNW_PPC64_LR]="LR",
+    [UNW_PPC64_CTR]="CTR",
+    [UNW_PPC64_ARG_POINTER]="ARG_POINTER",
+
+    [UNW_PPC64_CR0]="CR0",
+    [UNW_PPC64_CR1]="CR1",
+    [UNW_PPC64_CR2]="CR2",
+    [UNW_PPC64_CR3]="CR3",
+    [UNW_PPC64_CR4]="CR4",
+    [UNW_PPC64_CR5]="CR5",
+    [UNW_PPC64_CR6]="CR6",
+    [UNW_PPC64_CR7]="CR7",
+
+    [UNW_PPC64_XER]="XER",
+
+    [UNW_PPC64_V0]="VR0",
+    [UNW_PPC64_V1]="VR1",
+    [UNW_PPC64_V2]="VR2",
+    [UNW_PPC64_V3]="VR3",
+    [UNW_PPC64_V4]="VR4",
+    [UNW_PPC64_V5]="VR5",
+    [UNW_PPC64_V6]="VR6",
+    [UNW_PPC64_V7]="VR7",
+    [UNW_PPC64_V8]="VR8",
+    [UNW_PPC64_V9]="VR9",
+    [UNW_PPC64_V10]="VR10",
+    [UNW_PPC64_V11]="VR11",
+    [UNW_PPC64_V12]="VR12",
+    [UNW_PPC64_V13]="VR13",
+    [UNW_PPC64_V14]="VR14",
+    [UNW_PPC64_V15]="VR15",
+    [UNW_PPC64_V16]="VR16",
+    [UNW_PPC64_V17]="VR17",
+    [UNW_PPC64_V18]="VR18",
+    [UNW_PPC64_V19]="VR19",
+    [UNW_PPC64_V20]="VR20",
+    [UNW_PPC64_V21]="VR21",
+    [UNW_PPC64_V22]="VR22",
+    [UNW_PPC64_V23]="VR23",
+    [UNW_PPC64_V24]="VR24",
+    [UNW_PPC64_V25]="VR25",
+    [UNW_PPC64_V26]="VR26",
+    [UNW_PPC64_V27]="VR27",
+    [UNW_PPC64_V28]="VR28",
+    [UNW_PPC64_V29]="VR29",
+    [UNW_PPC64_V30]="VR30",
+    [UNW_PPC64_V31]="VR31",
+
+    [UNW_PPC64_VSCR]="VSCR",
+
+    [UNW_PPC64_VRSAVE]="VRSAVE",
+    [UNW_PPC64_SPE_ACC]="SPE_ACC",
+    [UNW_PPC64_SPEFSCR]="SPEFSCR",
+
+    [UNW_PPC64_FRAME_POINTER]="FRAME_POINTER",
+    [UNW_PPC64_NIP]="NIP",
+
+   };
+
+const char *
+unw_regname (unw_regnum_t reg)
+{
+  if (reg < (unw_regnum_t) ARRAY_SIZE (regname))
+    return regname[reg];
+  else
+    return "???";
+}
diff --git a/src/third_party/unwind/dist/src/ppc64/ucontext_i.h b/src/third_party/unwind/dist/src/ppc64/ucontext_i.h
new file mode 100644
index 00000000000..2ddfdb865a7
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc64/ucontext_i.h
@@ -0,0 +1,173 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef ucontext_i_h
+#define ucontext_i_h
+
+#include <ucontext.h>
+
+/* These values were derived by reading
+   /usr/src/linux-2.6.18-1.8/arch/um/include/sysdep-ppc/ptrace.h and
+   /usr/src/linux-2.6.18-1.8/arch/powerpc/kernel/ppc32.h
+*/
+
+#define NIP_IDX         32
+#define MSR_IDX         33
+#define ORIG_GPR3_IDX   34
+#define CTR_IDX         35
+#define LINK_IDX        36
+#define XER_IDX         37
+#define CCR_IDX         38
+#define SOFTE_IDX       39
+#define TRAP_IDX        40
+#define DAR_IDX         41
+#define DSISR_IDX       42
+#define RESULT_IDX      43
+
+#define VSCR_IDX        32
+#define VRSAVE_IDX      33
+
+/* These are dummy structures used only for obtaining the offsets of the
+   various structure members. */
+static ucontext_t dmy_ctxt;
+static vrregset_t dmy_vrregset;
+
+#define UC_MCONTEXT_GREGS_R0 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[0] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R1 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[1] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R2 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[2] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R3 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[3] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R4 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[4] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R5 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[5] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R6 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[6] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R7 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[7] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R8 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[8] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R9 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[9] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R10 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[10] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R11 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[11] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R12 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[12] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R13 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[13] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R14 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[14] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R15 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[15] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R16 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[16] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R17 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[17] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R18 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[18] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R19 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[19] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R20 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[20] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R21 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[21] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R22 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[22] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R23 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[23] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R24 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[24] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R25 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[25] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R26 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[26] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R27 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[27] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R28 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[28] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R29 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[29] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R30 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[30] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_R31 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[31] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_NIP ((void *)&dmy_ctxt.uc_mcontext.gp_regs[NIP_IDX] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_MSR ((void *)&dmy_ctxt.uc_mcontext.gp_regs[MSR_IDX] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_ORIG_GPR3 ((void *)&dmy_ctxt.uc_mcontext.gp_regs[ORIG_GPR3_IDX] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_CTR ((void *)&dmy_ctxt.uc_mcontext.gp_regs[CTR_IDX] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_LINK ((void *)&dmy_ctxt.uc_mcontext.gp_regs[LINK_IDX] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_XER ((void *)&dmy_ctxt.uc_mcontext.gp_regs[XER_IDX] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_CCR ((void *)&dmy_ctxt.uc_mcontext.gp_regs[CCR_IDX] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_SOFTE ((void *)&dmy_ctxt.uc_mcontext.gp_regs[SOFTE_IDX] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_TRAP ((void *)&dmy_ctxt.uc_mcontext.gp_regs[TRAP_IDX] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_DAR ((void *)&dmy_ctxt.uc_mcontext.gp_regs[DAR_IDX] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_DSISR ((void *)&dmy_ctxt.uc_mcontext.gp_regs[DSISR_IDX] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_GREGS_RESULT ((void *)&dmy_ctxt.uc_mcontext.gp_regs[RESULT_IDX] - (void *)&dmy_ctxt)
+
+#define UC_MCONTEXT_FREGS_R0 ((void *)&dmy_ctxt.uc_mcontext.fp_regs[0] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R1 ((void *)&dmy_ctxt.uc_mcontext.fp_regs[1] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R2 ((void *)&dmy_ctxt.uc_mcontext.fp_regs[2] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R3 ((void *)&dmy_ctxt.uc_mcontext.fp_regs[3] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R4 ((void *)&dmy_ctxt.uc_mcontext.fp_regs[4] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R5 ((void *)&dmy_ctxt.uc_mcontext.fp_regs[5] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R6 ((void *)&dmy_ctxt.uc_mcontext.fp_regs[6] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R7 ((void *)&dmy_ctxt.uc_mcontext.fp_regs[7] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R8 ((void *)&dmy_ctxt.uc_mcontext.fp_regs[8] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R9 ((void *)&dmy_ctxt.uc_mcontext.fp_regs[9] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R10 ((void *)&dmy_ctxt.uc_mcontext.fp_regs[10] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R11 ((void *)&dmy_ctxt.uc_mcontext.fp_regs[11] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R12 ((void *)&dmy_ctxt.uc_mcontext.fp_regs[12] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R13 ((void *)&dmy_ctxt.uc_mcontext.fp_regs[13] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R14 ((void *)&dmy_ctxt.uc_mcontext.fp_regs[14] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R15 ((void *)&dmy_ctxt.uc_mcontext.fp_regs[15] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R16 ((void *)&dmy_ctxt.uc_mcontext.fp_regs[16] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R17 ((void *)&dmy_ctxt.uc_mcontext.fp_regs[17] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R18 ((void *)&dmy_ctxt.uc_mcontext.fp_regs[18] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R19 ((void *)&dmy_ctxt.uc_mcontext.fp_regs[19] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R20 ((void *)&dmy_ctxt.uc_mcontext.fp_regs[20] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R21 ((void *)&dmy_ctxt.uc_mcontext.fp_regs[21] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R22 ((void *)&dmy_ctxt.uc_mcontext.fp_regs[22] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R23 ((void *)&dmy_ctxt.uc_mcontext.fp_regs[23] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R24 ((void *)&dmy_ctxt.uc_mcontext.fp_regs[24] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R25 ((void *)&dmy_ctxt.uc_mcontext.fp_regs[25] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R26 ((void *)&dmy_ctxt.uc_mcontext.fp_regs[26] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R27 ((void *)&dmy_ctxt.uc_mcontext.fp_regs[27] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R28 ((void *)&dmy_ctxt.uc_mcontext.fp_regs[28] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R29 ((void *)&dmy_ctxt.uc_mcontext.fp_regs[29] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R30 ((void *)&dmy_ctxt.uc_mcontext.fp_regs[30] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_R31 ((void *)&dmy_ctxt.uc_mcontext.fp_regs[31] - (void *)&dmy_ctxt)
+#define UC_MCONTEXT_FREGS_FPSCR ((void *)&dmy_ctxt.uc_mcontext.fp_regs[32] - (void *)&dmy_ctxt)
+
+#define UC_MCONTEXT_V_REGS ((void *)&dmy_ctxt.uc_mcontext.v_regs - (void *)&dmy_ctxt)
+
+#define UC_MCONTEXT_VREGS_R0 ((void *)&dmy_vrregset.vrregs[0] - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_R1 ((void *)&dmy_vrregset.vrregs[1] - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_R2 ((void *)&dmy_vrregset.vrregs[2] - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_R3 ((void *)&dmy_vrregset.vrregs[3] - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_R4 ((void *)&dmy_vrregset.vrregs[4] - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_R5 ((void *)&dmy_vrregset.vrregs[5] - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_R6 ((void *)&dmy_vrregset.vrregs[6] - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_R7 ((void *)&dmy_vrregset.vrregs[7] - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_R8 ((void *)&dmy_vrregset.vrregs[8] - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_R9 ((void *)&dmy_vrregset.vrregs[9] - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_R10 ((void *)&dmy_vrregset.vrregs[10] - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_R11 ((void *)&dmy_vrregset.vrregs[11] - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_R12 ((void *)&dmy_vrregset.vrregs[12] - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_R13 ((void *)&dmy_vrregset.vrregs[13] - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_R14 ((void *)&dmy_vrregset.vrregs[14] - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_R15 ((void *)&dmy_vrregset.vrregs[15] - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_R16 ((void *)&dmy_vrregset.vrregs[16] - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_R17 ((void *)&dmy_vrregset.vrregs[17] - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_R18 ((void *)&dmy_vrregset.vrregs[18] - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_R19 ((void *)&dmy_vrregset.vrregs[19] - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_R20 ((void *)&dmy_vrregset.vrregs[20] - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_R21 ((void *)&dmy_vrregset.vrregs[21] - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_R22 ((void *)&dmy_vrregset.vrregs[22] - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_R23 ((void *)&dmy_vrregset.vrregs[23] - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_R24 ((void *)&dmy_vrregset.vrregs[24] - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_R25 ((void *)&dmy_vrregset.vrregs[25] - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_R26 ((void *)&dmy_vrregset.vrregs[26] - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_R27 ((void *)&dmy_vrregset.vrregs[27] - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_R28 ((void *)&dmy_vrregset.vrregs[28] - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_R29 ((void *)&dmy_vrregset.vrregs[29] - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_R30 ((void *)&dmy_vrregset.vrregs[30] - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_R31 ((void *)&dmy_vrregset.vrregs[31] - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_VSCR ((void *)&dmy_vrregset.vscr - (void *)&dmy_vrregset)
+#define UC_MCONTEXT_VREGS_VRSAVE ((void *)&dmy_vrregset.vrsave - (void *)&dmy_vrregset)
+
+#endif
diff --git a/src/third_party/unwind/dist/src/ppc64/unwind_i.h b/src/third_party/unwind/dist/src/ppc64/unwind_i.h
new file mode 100644
index 00000000000..26bbc2df83a
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ppc64/unwind_i.h
@@ -0,0 +1,52 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef unwind_i_h
+#define unwind_i_h
+
+#include <stdint.h>
+
+#include <libunwind-ppc64.h>
+
+#include <libunwind_i.h>
+#include <sys/ucontext.h>
+
+#define ppc64_lock                      UNW_OBJ(lock)
+#define ppc64_local_resume              UNW_OBJ(local_resume)
+#define ppc64_local_addr_space_init     UNW_OBJ(local_addr_space_init)
+#if 0
+#define ppc64_scratch_loc               UNW_OBJ(scratch_loc)
+#endif
+
+extern void ppc64_local_addr_space_init (void);
+extern int ppc64_local_resume (unw_addr_space_t as, unw_cursor_t *cursor,
+                             void *arg);
+#if 0
+extern dwarf_loc_t ppc64_scratch_loc (struct cursor *c, unw_regnum_t reg);
+#endif
+
+#endif /* unwind_i_h */
diff --git a/src/third_party/unwind/dist/src/ptrace/_UPT_access_fpreg.c b/src/third_party/unwind/dist/src/ptrace/_UPT_access_fpreg.c
new file mode 100644
index 00000000000..37cd4ffe1c2
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ptrace/_UPT_access_fpreg.c
@@ -0,0 +1,128 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+   Copyright (C) 2010 Konstantin Belousov <kib@freebsd.org>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "_UPT_internal.h"
+
+#if HAVE_DECL_PTRACE_POKEUSER || HAVE_TTRACE
+int
+_UPT_access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val,
+                   int write, void *arg)
+{
+  unw_word_t *wp = (unw_word_t *) val;
+  struct UPT_info *ui = arg;
+  pid_t pid = ui->pid;
+  int i;
+
+  if ((unsigned) reg >= ARRAY_SIZE (_UPT_reg_offset))
+    return -UNW_EBADREG;
+
+  errno = 0;
+  if (write)
+    for (i = 0; i < (int) (sizeof (*val) / sizeof (wp[i])); ++i)
+      {
+#ifdef HAVE_TTRACE
+#       warning No support for ttrace() yet.
+#else
+        ptrace (PTRACE_POKEUSER, pid, _UPT_reg_offset[reg] + i * sizeof(wp[i]),
+                wp[i]);
+#endif
+        if (errno)
+          return -UNW_EBADREG;
+      }
+  else
+    for (i = 0; i < (int) (sizeof (*val) / sizeof (wp[i])); ++i)
+      {
+#ifdef HAVE_TTRACE
+#       warning No support for ttrace() yet.
+#else
+        wp[i] = ptrace (PTRACE_PEEKUSER, pid,
+                        _UPT_reg_offset[reg] + i * sizeof(wp[i]), 0);
+#endif
+        if (errno)
+          return -UNW_EBADREG;
+      }
+  return 0;
+}
+#elif HAVE_DECL_PT_GETFPREGS
+int
+_UPT_access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val,
+                   int write, void *arg)
+{
+  struct UPT_info *ui = arg;
+  pid_t pid = ui->pid;
+  fpregset_t fpreg;
+
+#if defined(__amd64__)
+  if (1) /* XXXKIB */
+    return -UNW_EBADREG;
+#elif defined(__i386__)
+  if ((unsigned) reg < UNW_X86_ST0 || (unsigned) reg > UNW_X86_ST7)
+    return -UNW_EBADREG;
+#elif defined(__arm__)
+  if ((unsigned) reg < UNW_ARM_F0 || (unsigned) reg > UNW_ARM_F7)
+    return -UNW_EBADREG;
+#elif defined(__aarch64__)
+  if ((unsigned) reg < UNW_AARCH64_V0 || (unsigned) reg > UNW_AARCH64_V31)
+    return -UNW_EBADREG;
+#else
+#error Fix me
+#endif
+  if ((unsigned) reg >= ARRAY_SIZE (_UPT_reg_offset))
+    return -UNW_EBADREG;
+
+  if (ptrace(PT_GETFPREGS, pid, (caddr_t)&fpreg, 0) == -1)
+          return -UNW_EBADREG;
+  if (write) {
+#if defined(__amd64__)
+          memcpy(&fpreg.fpr_xacc[reg], val, sizeof(unw_fpreg_t));
+#elif defined(__i386__)
+          memcpy(&fpreg.fpr_acc[reg], val, sizeof(unw_fpreg_t));
+#elif defined(__arm__)
+          memcpy(&fpreg.fpr[reg], val, sizeof(unw_fpreg_t));
+#elif defined(__aarch64__)
+          memcpy(&fpreg.fp_q[reg], val, sizeof(unw_fpreg_t));
+#else
+#error Fix me
+#endif
+          if (ptrace(PT_SETFPREGS, pid, (caddr_t)&fpreg, 0) == -1)
+                  return -UNW_EBADREG;
+  } else
+#if defined(__amd64__)
+          memcpy(val, &fpreg.fpr_xacc[reg], sizeof(unw_fpreg_t));
+#elif defined(__i386__)
+          memcpy(val, &fpreg.fpr_acc[reg], sizeof(unw_fpreg_t));
+#elif defined(__arm__)
+          memcpy(val, &fpreg.fpr[reg], sizeof(unw_fpreg_t));
+#elif defined(__aarch64__)
+          memcpy(val, &fpreg.fp_q[reg], sizeof(unw_fpreg_t));
+#else
+#error Fix me
+#endif
+  return 0;
+}
+#else
+#error Fix me
+#endif
diff --git a/src/third_party/unwind/dist/src/ptrace/_UPT_access_mem.c b/src/third_party/unwind/dist/src/ptrace/_UPT_access_mem.c
new file mode 100644
index 00000000000..79bde25dffc
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ptrace/_UPT_access_mem.c
@@ -0,0 +1,123 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+   Copyright (C) 2010 Konstantin Belousov <kib@freebsd.org>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "_UPT_internal.h"
+
+#if HAVE_DECL_PTRACE_POKEDATA || HAVE_TTRACE
+int
+_UPT_access_mem (unw_addr_space_t as, unw_word_t addr, unw_word_t *val,
+                 int write, void *arg)
+{
+  struct UPT_info *ui = arg;
+  int    i, end;
+  unw_word_t tmp_val;
+
+  if (!ui)
+        return -UNW_EINVAL;
+
+  pid_t pid = ui->pid;
+
+  // Some 32-bit archs have to define a 64-bit unw_word_t.
+  // Callers of this function therefore expect a 64-bit
+  // return value, but ptrace only returns a 32-bit value
+  // in such cases.
+  if (sizeof(long) == 4 && sizeof(unw_word_t) == 8)
+    end = 2;
+  else
+    end = 1;
+
+  for (i = 0; i < end; i++)
+    {
+      unw_word_t tmp_addr = i == 0 ? addr : addr + 4;
+
+      errno = 0;
+      if (write)
+        {
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+          tmp_val = i == 0 ? *val : *val >> 32;
+#else
+          tmp_val = i == 0 && end == 2 ? *val >> 32 : *val;
+#endif
+
+          Debug (16, "mem[%lx] <- %lx\n", (long) tmp_addr, (long) tmp_val);
+#ifdef HAVE_TTRACE
+#         warning No support for ttrace() yet.
+#else
+          ptrace (PTRACE_POKEDATA, pid, tmp_addr, tmp_val);
+          if (errno)
+            return -UNW_EINVAL;
+#endif
+        }
+      else
+        {
+#ifdef HAVE_TTRACE
+#         warning No support for ttrace() yet.
+#else
+          tmp_val = (unsigned long) ptrace (PTRACE_PEEKDATA, pid, tmp_addr, 0);
+
+          if (i == 0)
+              *val = 0;
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+          *val |= tmp_val << (i * 32);
+#else
+          *val |= i == 0 && end == 2 ? tmp_val << 32 : tmp_val;
+#endif
+
+          if (errno)
+            return -UNW_EINVAL;
+#endif
+          Debug (16, "mem[%lx] -> %lx\n", (long) tmp_addr, (long) tmp_val);
+        }
+    }
+  return 0;
+}
+#elif HAVE_DECL_PT_IO
+int
+_UPT_access_mem (unw_addr_space_t as, unw_word_t addr, unw_word_t *val,
+                 int write, void *arg)
+{
+  struct UPT_info *ui = arg;
+  if (!ui)
+        return -UNW_EINVAL;
+  pid_t pid = ui->pid;
+  struct ptrace_io_desc iod;
+
+  iod.piod_offs = (void *)addr;
+  iod.piod_addr = val;
+  iod.piod_len = sizeof(*val);
+  iod.piod_op = write ? PIOD_WRITE_D : PIOD_READ_D;
+  if (write)
+    Debug (16, "mem[%lx] <- %lx\n", (long) addr, (long) *val);
+  if (ptrace(PT_IO, pid, (caddr_t)&iod, 0) == -1)
+    return -UNW_EINVAL;
+  if (!write)
+     Debug (16, "mem[%lx] -> %lx\n", (long) addr, (long) *val);
+  return 0;
+}
+#else
+#error Fix me
+#endif
diff --git a/src/third_party/unwind/dist/src/ptrace/_UPT_access_reg.c b/src/third_party/unwind/dist/src/ptrace/_UPT_access_reg.c
new file mode 100644
index 00000000000..ce25c783b04
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ptrace/_UPT_access_reg.c
@@ -0,0 +1,352 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+   Copyright (C) 2010 Konstantin Belousov <kib@freebsd.org>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "_UPT_internal.h"
+
+#if UNW_TARGET_IA64
+# include <elf.h>
+# ifdef HAVE_ASM_PTRACE_OFFSETS_H
+#   include <asm/ptrace_offsets.h>
+# endif
+# include "tdep-ia64/rse.h"
+#endif
+
+#if HAVE_DECL_PTRACE_SETREGSET
+#include <sys/uio.h>
+int
+_UPT_access_reg (unw_addr_space_t as, unw_regnum_t reg, unw_word_t *val,
+                 int write, void *arg)
+{
+  struct UPT_info *ui = arg;
+  pid_t pid = ui->pid;
+  gregset_t regs;
+  char *r;
+  struct iovec loc;
+
+#if UNW_DEBUG
+  Debug(16, "using getregset: reg: %s [%u], val: %lx, write: %u\n", 
+	unw_regname(reg), (unsigned) reg, (long) val, write);
+
+  if (write)
+    Debug (16, "%s [%u] <- %lx\n", unw_regname (reg), (unsigned) reg, (long) *val);
+#endif
+  if ((unsigned) reg >= ARRAY_SIZE (_UPT_reg_offset))
+    {
+      errno = EINVAL;
+      goto badreg;
+    }
+
+  loc.iov_base = &regs;
+  loc.iov_len = sizeof(regs);
+
+  r = (char *)&regs + _UPT_reg_offset[reg];
+  if (ptrace (PTRACE_GETREGSET, pid, NT_PRSTATUS, &loc) == -1)
+    goto badreg;
+  if (write) {
+    memcpy(r, val, sizeof(unw_word_t));
+    if (ptrace(PTRACE_SETREGSET, pid, NT_PRSTATUS, &loc) == -1)
+      goto badreg;
+  } else
+    memcpy(val, r, sizeof(unw_word_t));
+  return 0;
+
+badreg:
+  Debug (1, "bad register %s [%u] (error: %s)\n", unw_regname(reg), reg, strerror (errno));
+  return -UNW_EBADREG;
+}
+#elif HAVE_DECL_PTRACE_POKEUSER || HAVE_TTRACE
+int
+_UPT_access_reg (unw_addr_space_t as, unw_regnum_t reg, unw_word_t *val,
+                 int write, void *arg)
+{
+  struct UPT_info *ui = arg;
+  pid_t pid = ui->pid;
+
+#if UNW_DEBUG
+  Debug(16, "using pokeuser: reg: %s [%u], val: %lx, write: %d\n", unw_regname(reg), (unsigned) reg, (long) val, write);
+
+  if (write)
+    Debug (16, "%s <- %lx\n", unw_regname (reg), (long) *val);
+#endif
+
+#if UNW_TARGET_IA64
+  if ((unsigned) reg - UNW_IA64_NAT < 32)
+    {
+      unsigned long nat_bits, mask;
+
+      /* The Linux ptrace represents the statc NaT bits as a single word.  */
+      mask = ((unw_word_t) 1) << (reg - UNW_IA64_NAT);
+      errno = 0;
+#ifdef HAVE_TTRACE
+#       warning No support for ttrace() yet.
+#else
+      nat_bits = ptrace (PTRACE_PEEKUSER, pid, PT_NAT_BITS, 0);
+      if (errno)
+        goto badreg;
+#endif
+
+      if (write)
+        {
+          if (*val)
+            nat_bits |= mask;
+          else
+            nat_bits &= ~mask;
+#ifdef HAVE_TTRACE
+#       warning No support for ttrace() yet.
+#else
+          errno = 0;
+          ptrace (PTRACE_POKEUSER, pid, PT_NAT_BITS, nat_bits);
+          if (errno)
+            goto badreg;
+#endif
+        }
+      goto out;
+    }
+  else
+    switch (reg)
+      {
+      case UNW_IA64_GR + 0:
+        if (write)
+          goto badreg;
+        *val = 0;
+        return 0;
+
+      case UNW_REG_IP:
+        {
+          unsigned long ip, psr;
+
+          /* distribute bundle-addr. & slot-number across PT_IIP & PT_IPSR.  */
+#ifdef HAVE_TTRACE
+#       warning No support for ttrace() yet.
+#else
+          errno = 0;
+          psr = ptrace (PTRACE_PEEKUSER, pid, PT_CR_IPSR, 0);
+          if (errno)
+            goto badreg;
+#endif
+          if (write)
+            {
+              ip = *val & ~0xfUL;
+              psr = (psr & ~0x3UL << 41) | (*val & 0x3);
+#ifdef HAVE_TTRACE
+#       warning No support for ttrace() yet.
+#else
+              errno = 0;
+              ptrace (PTRACE_POKEUSER, pid, PT_CR_IIP, ip);
+              ptrace (PTRACE_POKEUSER, pid, PT_CR_IPSR, psr);
+              if (errno)
+                goto badreg;
+#endif
+            }
+          else
+            {
+#ifdef HAVE_TTRACE
+#       warning No support for ttrace() yet.
+#else
+              errno = 0;
+              ip = ptrace (PTRACE_PEEKUSER, pid, PT_CR_IIP, 0);
+              if (errno)
+                goto badreg;
+#endif
+              *val = ip + ((psr >> 41) & 0x3);
+            }
+          goto out;
+        }
+
+      case UNW_IA64_AR_BSPSTORE:
+        reg = UNW_IA64_AR_BSP;
+        break;
+
+      case UNW_IA64_AR_BSP:
+      case UNW_IA64_BSP:
+        {
+          unsigned long sof, cfm, bsp;
+
+#ifdef HAVE_TTRACE
+#       warning No support for ttrace() yet.
+#else
+          /* Account for the fact that ptrace() expects bsp to point
+             _after_ the current register frame.  */
+          errno = 0;
+          cfm = ptrace (PTRACE_PEEKUSER, pid, PT_CFM, 0);
+          if (errno)
+            goto badreg;
+#endif
+          sof = (cfm & 0x7f);
+
+          if (write)
+            {
+              bsp = rse_skip_regs (*val, sof);
+#ifdef HAVE_TTRACE
+#       warning No support for ttrace() yet.
+#else
+              errno = 0;
+              ptrace (PTRACE_POKEUSER, pid, PT_AR_BSP, bsp);
+              if (errno)
+                goto badreg;
+#endif
+            }
+          else
+            {
+#ifdef HAVE_TTRACE
+#       warning No support for ttrace() yet.
+#else
+              errno = 0;
+              bsp = ptrace (PTRACE_PEEKUSER, pid, PT_AR_BSP, 0);
+              if (errno)
+                goto badreg;
+#endif
+              *val = rse_skip_regs (bsp, -sof);
+            }
+          goto out;
+        }
+
+      case UNW_IA64_CFM:
+        /* If we change CFM, we need to adjust ptrace's notion of bsp
+           accordingly, so that the real bsp remains unchanged.  */
+        if (write)
+          {
+            unsigned long new_sof, old_sof, cfm, bsp;
+
+#ifdef HAVE_TTRACE
+#       warning No support for ttrace() yet.
+#else
+            errno = 0;
+            bsp = ptrace (PTRACE_PEEKUSER, pid, PT_AR_BSP, 0);
+            cfm = ptrace (PTRACE_PEEKUSER, pid, PT_CFM, 0);
+#endif
+            if (errno)
+              goto badreg;
+            old_sof = (cfm & 0x7f);
+            new_sof = (*val & 0x7f);
+            if (old_sof != new_sof)
+              {
+                bsp = rse_skip_regs (bsp, -old_sof + new_sof);
+#ifdef HAVE_TTRACE
+#       warning No support for ttrace() yet.
+#else
+                errno = 0;
+                ptrace (PTRACE_POKEUSER, pid, PT_AR_BSP, 0);
+                if (errno)
+                  goto badreg;
+#endif
+              }
+#ifdef HAVE_TTRACE
+#       warning No support for ttrace() yet.
+#else
+            errno = 0;
+            ptrace (PTRACE_POKEUSER, pid, PT_CFM, *val);
+            if (errno)
+              goto badreg;
+#endif
+            goto out;
+          }
+        break;
+      }
+#endif /* End of IA64 */
+
+  if ((unsigned) reg >= ARRAY_SIZE (_UPT_reg_offset))
+    {
+#if UNW_DEBUG
+      Debug(2, "register out of range: >= %zu / %zu\n", sizeof(_UPT_reg_offset), sizeof(_UPT_reg_offset[0]));
+#endif
+      errno = EINVAL;
+      goto badreg;
+    }
+
+#ifdef HAVE_TTRACE
+#       warning No support for ttrace() yet.
+#else
+  errno = 0;
+  if (write)
+    ptrace (PTRACE_POKEUSER, pid, _UPT_reg_offset[reg], *val);
+  else {
+#if UNW_DEBUG
+    Debug(16, "ptrace PEEKUSER pid: %lu , reg: %lu , offs: %lu\n", (unsigned long)pid, (unsigned long)reg,
+        (unsigned long)_UPT_reg_offset[reg]);
+#endif
+    *val = ptrace (PTRACE_PEEKUSER, pid, _UPT_reg_offset[reg], 0);
+  }
+  if (errno) {
+#if UNW_DEBUG
+    Debug(2, "ptrace failure\n");
+#endif
+    goto badreg;
+  }
+#endif
+
+#ifdef UNW_TARGET_IA64
+ out:
+#endif
+#if UNW_DEBUG
+  if (!write)
+    Debug (16, "%s[%u] -> %lx\n", unw_regname (reg), (unsigned) reg, (long) *val);
+#endif
+  return 0;
+
+ badreg:
+  Debug (1, "bad register %s [%u] (error: %s)\n", unw_regname(reg), reg, strerror (errno));
+  return -UNW_EBADREG;
+}
+#elif HAVE_DECL_PT_GETREGS
+int
+_UPT_access_reg (unw_addr_space_t as, unw_regnum_t reg, unw_word_t *val,
+                 int write, void *arg)
+{
+  struct UPT_info *ui = arg;
+  pid_t pid = ui->pid;
+  gregset_t regs;
+  char *r;
+
+#if UNW_DEBUG
+  Debug(16, "using getregs: reg: %s [%u], val: %lx, write: %u\n", unw_regname(reg), (unsigned) reg, (long) val, write);
+
+  if (write)
+    Debug (16, "%s [%u] <- %lx\n", unw_regname (reg), (unsigned) reg, (long) *val);
+#endif
+  if ((unsigned) reg >= ARRAY_SIZE (_UPT_reg_offset))
+    {
+      errno = EINVAL;
+      goto badreg;
+    }
+  r = (char *)&regs + _UPT_reg_offset[reg];
+  if (ptrace(PT_GETREGS, pid, (caddr_t)&regs, 0) == -1)
+    goto badreg;
+  if (write) {
+      memcpy(r, val, sizeof(unw_word_t));
+      if (ptrace(PT_SETREGS, pid, (caddr_t)&regs, 0) == -1)
+        goto badreg;
+  } else
+      memcpy(val, r, sizeof(unw_word_t));
+  return 0;
+
+ badreg:
+  Debug (1, "bad register %s [%u] (error: %s)\n", unw_regname(reg), reg, strerror (errno));
+  return -UNW_EBADREG;
+}
+#else
+#error Port me
+#endif
diff --git a/src/third_party/unwind/dist/src/ptrace/_UPT_accessors.c b/src/third_party/unwind/dist/src/ptrace/_UPT_accessors.c
new file mode 100644
index 00000000000..4724360bb99
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ptrace/_UPT_accessors.c
@@ -0,0 +1,38 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "_UPT_internal.h"
+
+unw_accessors_t _UPT_accessors =
+  {
+    .find_proc_info             = _UPT_find_proc_info,
+    .put_unwind_info            = _UPT_put_unwind_info,
+    .get_dyn_info_list_addr     = _UPT_get_dyn_info_list_addr,
+    .access_mem                 = _UPT_access_mem,
+    .access_reg                 = _UPT_access_reg,
+    .access_fpreg               = _UPT_access_fpreg,
+    .resume                     = _UPT_resume,
+    .get_proc_name              = _UPT_get_proc_name
+  };
diff --git a/src/third_party/unwind/dist/src/ptrace/_UPT_create.c b/src/third_party/unwind/dist/src/ptrace/_UPT_create.c
new file mode 100644
index 00000000000..dd59e974a7e
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ptrace/_UPT_create.c
@@ -0,0 +1,46 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <string.h>
+
+#include "_UPT_internal.h"
+
+void *
+_UPT_create (pid_t pid)
+{
+  struct UPT_info *ui = malloc (sizeof (struct UPT_info));
+
+  if (!ui)
+    return NULL;
+
+  memset (ui, 0, sizeof (*ui));
+  ui->pid = pid;
+  ui->edi.di_cache.format = -1;
+  ui->edi.di_debug.format = -1;
+#if UNW_TARGET_IA64
+  ui->edi.ktab.format = -1;
+#endif
+  return ui;
+}
diff --git a/src/third_party/unwind/dist/src/ptrace/_UPT_destroy.c b/src/third_party/unwind/dist/src/ptrace/_UPT_destroy.c
new file mode 100644
index 00000000000..edb664ce123
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ptrace/_UPT_destroy.c
@@ -0,0 +1,34 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "_UPT_internal.h"
+
+void
+_UPT_destroy (void *ptr)
+{
+  struct UPT_info *ui = (struct UPT_info *) ptr;
+  invalidate_edi (&ui->edi);
+  free (ptr);
+}
diff --git a/src/third_party/unwind/dist/src/ptrace/_UPT_elf.c b/src/third_party/unwind/dist/src/ptrace/_UPT_elf.c
new file mode 100644
index 00000000000..efc43b578ba
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ptrace/_UPT_elf.c
@@ -0,0 +1,5 @@
+/* We need to get a separate copy of the ELF-code into
+   libunwind-ptrace since it cannot (and must not) have any ELF
+   dependencies on libunwind.  */
+#include "libunwind_i.h"        /* get ELFCLASS defined */
+#include "../elfxx.c"
diff --git a/src/third_party/unwind/dist/src/ptrace/_UPT_find_proc_info.c b/src/third_party/unwind/dist/src/ptrace/_UPT_find_proc_info.c
new file mode 100644
index 00000000000..b3209f451ea
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ptrace/_UPT_find_proc_info.c
@@ -0,0 +1,145 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <elf.h>
+#include <fcntl.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <sys/mman.h>
+
+#include "_UPT_internal.h"
+
+static int
+get_unwind_info (struct elf_dyn_info *edi, pid_t pid, unw_addr_space_t as, unw_word_t ip)
+{
+  unsigned long segbase, mapoff;
+  char path[PATH_MAX];
+
+#if UNW_TARGET_IA64 && defined(__linux)
+  if (!edi->ktab.start_ip && _Uia64_get_kernel_table (&edi->ktab) < 0)
+    return -UNW_ENOINFO;
+
+  if (edi->ktab.format != -1 && ip >= edi->ktab.start_ip && ip < edi->ktab.end_ip)
+    return 0;
+#endif
+
+  if ((edi->di_cache.format != -1
+       && ip >= edi->di_cache.start_ip && ip < edi->di_cache.end_ip)
+#if UNW_TARGET_ARM
+      || (edi->di_debug.format != -1
+       && ip >= edi->di_arm.start_ip && ip < edi->di_arm.end_ip)
+#endif
+      || (edi->di_debug.format != -1
+       && ip >= edi->di_debug.start_ip && ip < edi->di_debug.end_ip))
+    return 0;
+
+  invalidate_edi(edi);
+
+  if (tdep_get_elf_image (&edi->ei, pid, ip, &segbase, &mapoff, path,
+                          sizeof(path)) < 0)
+    return -UNW_ENOINFO;
+
+  /* Here, SEGBASE is the starting-address of the (mmap'ped) segment
+     which covers the IP we're looking for.  */
+  if (tdep_find_unwind_table (edi, as, path, segbase, mapoff, ip) < 0)
+    return -UNW_ENOINFO;
+
+  /* This can happen in corner cases where dynamically generated
+     code falls into the same page that contains the data-segment
+     and the page-offset of the code is within the first page of
+     the executable.  */
+  if (edi->di_cache.format != -1
+      && (ip < edi->di_cache.start_ip || ip >= edi->di_cache.end_ip))
+     edi->di_cache.format = -1;
+
+  if (edi->di_debug.format != -1
+      && (ip < edi->di_debug.start_ip || ip >= edi->di_debug.end_ip))
+     edi->di_debug.format = -1;
+
+  if (edi->di_cache.format == -1
+#if UNW_TARGET_ARM
+      && edi->di_arm.format == -1
+#endif
+      && edi->di_debug.format == -1)
+    return -UNW_ENOINFO;
+
+  return 0;
+}
+
+int
+_UPT_find_proc_info (unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi,
+                     int need_unwind_info, void *arg)
+{
+  struct UPT_info *ui = arg;
+  int ret = -UNW_ENOINFO;
+
+  if (get_unwind_info (&ui->edi, ui->pid, as, ip) < 0)
+    return -UNW_ENOINFO;
+
+#if UNW_TARGET_IA64
+  if (ui->edi.ktab.format != -1)
+    {
+      /* The kernel unwind table resides in local memory, so we have
+         to use the local address space to search it.  Since
+         _UPT_put_unwind_info() has no easy way of detecting this
+         case, we simply make a copy of the unwind-info, so
+         _UPT_put_unwind_info() can always free() the unwind-info
+         without ill effects.  */
+      ret = tdep_search_unwind_table (unw_local_addr_space, ip, &ui->edi.ktab, pi,
+                                      need_unwind_info, arg);
+      if (ret >= 0)
+        {
+          if (!need_unwind_info)
+            pi->unwind_info = NULL;
+          else
+            {
+              void *mem = malloc (pi->unwind_info_size);
+
+              if (!mem)
+                return -UNW_ENOMEM;
+              memcpy (mem, pi->unwind_info, pi->unwind_info_size);
+              pi->unwind_info = mem;
+            }
+        }
+    }
+#endif
+
+  if (ret == -UNW_ENOINFO && ui->edi.di_cache.format != -1)
+    ret = tdep_search_unwind_table (as, ip, &ui->edi.di_cache,
+                                    pi, need_unwind_info, arg);
+
+  if (ret == -UNW_ENOINFO && ui->edi.di_debug.format != -1)
+    ret = tdep_search_unwind_table (as, ip, &ui->edi.di_debug, pi,
+                                    need_unwind_info, arg);
+
+#if UNW_TARGET_ARM
+  if (ret == -UNW_ENOINFO && ui->edi.di_arm.format != -1)
+    ret = tdep_search_unwind_table (as, ip, &ui->edi.di_arm, pi,
+                                    need_unwind_info, arg);
+#endif
+
+  return ret;
+}
diff --git a/src/third_party/unwind/dist/src/ptrace/_UPT_get_dyn_info_list_addr.c b/src/third_party/unwind/dist/src/ptrace/_UPT_get_dyn_info_list_addr.c
new file mode 100644
index 00000000000..cc5ed044186
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ptrace/_UPT_get_dyn_info_list_addr.c
@@ -0,0 +1,105 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "_UPT_internal.h"
+
+#if UNW_TARGET_IA64 && defined(__linux)
+# include "elf64.h"
+# include "os-linux.h"
+
+static inline int
+get_list_addr (unw_addr_space_t as, unw_word_t *dil_addr, void *arg,
+               int *countp)
+{
+  unsigned long lo, hi, off;
+  struct UPT_info *ui = arg;
+  struct map_iterator mi;
+  char path[PATH_MAX];
+  unw_word_t res;
+  int count = 0;
+
+  maps_init (&mi, ui->pid);
+  while (maps_next (&mi, &lo, &hi, &off))
+    {
+      if (off)
+        continue;
+
+      invalidate_edi(&ui->edi);
+
+      if (elf_map_image (&ui->edi.ei, path) < 0)
+        /* ignore unmappable stuff like "/SYSV00001b58 (deleted)" */
+        continue;
+
+      Debug (16, "checking object %s\n", path);
+
+      if (tdep_find_unwind_table (&ui->edi, as, path, lo, off, 0) > 0)
+        {
+          res = _Uia64_find_dyn_list (as, &ui->edi.di_cache, arg);
+          if (res && count++ == 0)
+            {
+              Debug (12, "dyn_info_list_addr = 0x%lx\n", (long) res);
+              *dil_addr = res;
+            }
+        }
+    }
+  maps_close (&mi);
+  *countp = count;
+  return 0;
+}
+
+#else
+
+static inline int
+get_list_addr (unw_addr_space_t as, unw_word_t *dil_addr, void *arg,
+               int *countp)
+{
+# warning Implement get_list_addr(), please.
+  *countp = 0;
+  return 0;
+}
+
+#endif
+
+int
+_UPT_get_dyn_info_list_addr (unw_addr_space_t as, unw_word_t *dil_addr,
+                             void *arg)
+{
+  int count, ret;
+
+  Debug (12, "looking for dyn_info list\n");
+
+  if ((ret = get_list_addr (as, dil_addr, arg, &count)) < 0)
+    return ret;
+
+  /* If multiple dynamic-info list addresses are found, we would have
+     to determine which was is the one actually in use (since the
+     dynamic name resolution algorithm will pick one "winner").
+     Perhaps we'd have to track them all until we find one that's
+     non-empty.  Hopefully, this case simply will never arise, since
+     only libunwind defines the dynamic info list head. */
+  assert (count <= 1);
+
+  return (count > 0) ? 0 : -UNW_ENOINFO;
+}
diff --git a/src/third_party/unwind/dist/src/ptrace/_UPT_get_proc_name.c b/src/third_party/unwind/dist/src/ptrace/_UPT_get_proc_name.c
new file mode 100644
index 00000000000..79c1f38e256
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ptrace/_UPT_get_proc_name.c
@@ -0,0 +1,42 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003 Hewlett-Packard Co
+   Copyright (C) 2007 David Mosberger-Tang
+        Contributed by David Mosberger-Tang <dmosberger@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "_UPT_internal.h"
+
+int
+_UPT_get_proc_name (unw_addr_space_t as, unw_word_t ip,
+                    char *buf, size_t buf_len, unw_word_t *offp, void *arg)
+{
+  struct UPT_info *ui = arg;
+
+#if ELF_CLASS == ELFCLASS64
+  return _Uelf64_get_proc_name (as, ui->pid, ip, buf, buf_len, offp);
+#elif ELF_CLASS == ELFCLASS32
+  return _Uelf32_get_proc_name (as, ui->pid, ip, buf, buf_len, offp);
+#else
+  return -UNW_ENOINFO;
+#endif
+}
diff --git a/src/third_party/unwind/dist/src/ptrace/_UPT_internal.h b/src/third_party/unwind/dist/src/ptrace/_UPT_internal.h
new file mode 100644
index 00000000000..5cef2573ee6
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ptrace/_UPT_internal.h
@@ -0,0 +1,59 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003, 2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef _UPT_internal_h
+#define _UPT_internal_h
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_PTRACE_H
+#include <sys/ptrace.h>
+#endif
+#ifdef HAVE_SYS_PROCFS_H
+#include <sys/procfs.h>
+#endif
+
+#include <errno.h>
+#include <libunwind-ptrace.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "libunwind_i.h"
+
+struct UPT_info
+  {
+    pid_t pid;          /* the process-id of the child we're unwinding */
+    struct elf_dyn_info edi;
+  };
+
+extern const int _UPT_reg_offset[UNW_REG_LAST + 1];
+
+#endif /* _UPT_internal_h */
diff --git a/src/third_party/unwind/dist/src/ptrace/_UPT_put_unwind_info.c b/src/third_party/unwind/dist/src/ptrace/_UPT_put_unwind_info.c
new file mode 100644
index 00000000000..d4b84631476
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ptrace/_UPT_put_unwind_info.c
@@ -0,0 +1,35 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "_UPT_internal.h"
+
+void
+_UPT_put_unwind_info (unw_addr_space_t as, unw_proc_info_t *pi, void *arg)
+{
+  if (!pi->unwind_info)
+    return;
+  free (pi->unwind_info);
+  pi->unwind_info = NULL;
+}
diff --git a/src/third_party/unwind/dist/src/ptrace/_UPT_reg_offset.c b/src/third_party/unwind/dist/src/ptrace/_UPT_reg_offset.c
new file mode 100644
index 00000000000..52be799980d
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ptrace/_UPT_reg_offset.c
@@ -0,0 +1,672 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+   Copyright (C) 2013 Linaro Limited
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "_UPT_internal.h"
+
+#include <stddef.h>
+
+#ifdef HAVE_ASM_PTRACE_OFFSETS_H
+# include <asm/ptrace_offsets.h>
+#endif
+
+const int _UPT_reg_offset[UNW_REG_LAST + 1] =
+  {
+#ifdef HAVE_ASM_PTRACE_OFFSETS_H
+# ifndef PT_AR_CSD
+#  define PT_AR_CSD     -1      /* this was introduced with rev 2.1 of ia64 */
+# endif
+
+    [UNW_IA64_GR +  0]  = -1,           [UNW_IA64_GR +  1]      = PT_R1,
+    [UNW_IA64_GR +  2]  = PT_R2,        [UNW_IA64_GR +  3]      = PT_R3,
+    [UNW_IA64_GR +  4]  = PT_R4,        [UNW_IA64_GR +  5]      = PT_R5,
+    [UNW_IA64_GR +  6]  = PT_R6,        [UNW_IA64_GR +  7]      = PT_R7,
+    [UNW_IA64_GR +  8]  = PT_R8,        [UNW_IA64_GR +  9]      = PT_R9,
+    [UNW_IA64_GR + 10]  = PT_R10,       [UNW_IA64_GR + 11]      = PT_R11,
+    [UNW_IA64_GR + 12]  = PT_R12,       [UNW_IA64_GR + 13]      = PT_R13,
+    [UNW_IA64_GR + 14]  = PT_R14,       [UNW_IA64_GR + 15]      = PT_R15,
+    [UNW_IA64_GR + 16]  = PT_R16,       [UNW_IA64_GR + 17]      = PT_R17,
+    [UNW_IA64_GR + 18]  = PT_R18,       [UNW_IA64_GR + 19]      = PT_R19,
+    [UNW_IA64_GR + 20]  = PT_R20,       [UNW_IA64_GR + 21]      = PT_R21,
+    [UNW_IA64_GR + 22]  = PT_R22,       [UNW_IA64_GR + 23]      = PT_R23,
+    [UNW_IA64_GR + 24]  = PT_R24,       [UNW_IA64_GR + 25]      = PT_R25,
+    [UNW_IA64_GR + 26]  = PT_R26,       [UNW_IA64_GR + 27]      = PT_R27,
+    [UNW_IA64_GR + 28]  = PT_R28,       [UNW_IA64_GR + 29]      = PT_R29,
+    [UNW_IA64_GR + 30]  = PT_R30,       [UNW_IA64_GR + 31]      = PT_R31,
+
+    [UNW_IA64_NAT+  0]  = -1,           [UNW_IA64_NAT+  1]      = PT_NAT_BITS,
+    [UNW_IA64_NAT+  2]  = PT_NAT_BITS,  [UNW_IA64_NAT+  3]      = PT_NAT_BITS,
+    [UNW_IA64_NAT+  4]  = PT_NAT_BITS,  [UNW_IA64_NAT+  5]      = PT_NAT_BITS,
+    [UNW_IA64_NAT+  6]  = PT_NAT_BITS,  [UNW_IA64_NAT+  7]      = PT_NAT_BITS,
+    [UNW_IA64_NAT+  8]  = PT_NAT_BITS,  [UNW_IA64_NAT+  9]      = PT_NAT_BITS,
+    [UNW_IA64_NAT+ 10]  = PT_NAT_BITS,  [UNW_IA64_NAT+ 11]      = PT_NAT_BITS,
+    [UNW_IA64_NAT+ 12]  = PT_NAT_BITS,  [UNW_IA64_NAT+ 13]      = PT_NAT_BITS,
+    [UNW_IA64_NAT+ 14]  = PT_NAT_BITS,  [UNW_IA64_NAT+ 15]      = PT_NAT_BITS,
+    [UNW_IA64_NAT+ 16]  = PT_NAT_BITS,  [UNW_IA64_NAT+ 17]      = PT_NAT_BITS,
+    [UNW_IA64_NAT+ 18]  = PT_NAT_BITS,  [UNW_IA64_NAT+ 19]      = PT_NAT_BITS,
+    [UNW_IA64_NAT+ 20]  = PT_NAT_BITS,  [UNW_IA64_NAT+ 21]      = PT_NAT_BITS,
+    [UNW_IA64_NAT+ 22]  = PT_NAT_BITS,  [UNW_IA64_NAT+ 23]      = PT_NAT_BITS,
+    [UNW_IA64_NAT+ 24]  = PT_NAT_BITS,  [UNW_IA64_NAT+ 25]      = PT_NAT_BITS,
+    [UNW_IA64_NAT+ 26]  = PT_NAT_BITS,  [UNW_IA64_NAT+ 27]      = PT_NAT_BITS,
+    [UNW_IA64_NAT+ 28]  = PT_NAT_BITS,  [UNW_IA64_NAT+ 29]      = PT_NAT_BITS,
+    [UNW_IA64_NAT+ 30]  = PT_NAT_BITS,  [UNW_IA64_NAT+ 31]      = PT_NAT_BITS,
+
+    [UNW_IA64_FR +  0]  = -1,           [UNW_IA64_FR +  1]      = -1,
+    [UNW_IA64_FR +  2]  = PT_F2,        [UNW_IA64_FR +  3]      = PT_F3,
+    [UNW_IA64_FR +  4]  = PT_F4,        [UNW_IA64_FR +  5]      = PT_F5,
+    [UNW_IA64_FR +  6]  = PT_F6,        [UNW_IA64_FR +  7]      = PT_F7,
+    [UNW_IA64_FR +  8]  = PT_F8,        [UNW_IA64_FR +  9]      = PT_F9,
+    [UNW_IA64_FR + 10]  = PT_F10,       [UNW_IA64_FR + 11]      = PT_F11,
+    [UNW_IA64_FR + 12]  = PT_F12,       [UNW_IA64_FR + 13]      = PT_F13,
+    [UNW_IA64_FR + 14]  = PT_F14,       [UNW_IA64_FR + 15]      = PT_F15,
+    [UNW_IA64_FR + 16]  = PT_F16,       [UNW_IA64_FR + 17]      = PT_F17,
+    [UNW_IA64_FR + 18]  = PT_F18,       [UNW_IA64_FR + 19]      = PT_F19,
+    [UNW_IA64_FR + 20]  = PT_F20,       [UNW_IA64_FR + 21]      = PT_F21,
+    [UNW_IA64_FR + 22]  = PT_F22,       [UNW_IA64_FR + 23]      = PT_F23,
+    [UNW_IA64_FR + 24]  = PT_F24,       [UNW_IA64_FR + 25]      = PT_F25,
+    [UNW_IA64_FR + 26]  = PT_F26,       [UNW_IA64_FR + 27]      = PT_F27,
+    [UNW_IA64_FR + 28]  = PT_F28,       [UNW_IA64_FR + 29]      = PT_F29,
+    [UNW_IA64_FR + 30]  = PT_F30,       [UNW_IA64_FR + 31]      = PT_F31,
+    [UNW_IA64_FR + 32]  = PT_F32,       [UNW_IA64_FR + 33]      = PT_F33,
+    [UNW_IA64_FR + 34]  = PT_F34,       [UNW_IA64_FR + 35]      = PT_F35,
+    [UNW_IA64_FR + 36]  = PT_F36,       [UNW_IA64_FR + 37]      = PT_F37,
+    [UNW_IA64_FR + 38]  = PT_F38,       [UNW_IA64_FR + 39]      = PT_F39,
+    [UNW_IA64_FR + 40]  = PT_F40,       [UNW_IA64_FR + 41]      = PT_F41,
+    [UNW_IA64_FR + 42]  = PT_F42,       [UNW_IA64_FR + 43]      = PT_F43,
+    [UNW_IA64_FR + 44]  = PT_F44,       [UNW_IA64_FR + 45]      = PT_F45,
+    [UNW_IA64_FR + 46]  = PT_F46,       [UNW_IA64_FR + 47]      = PT_F47,
+    [UNW_IA64_FR + 48]  = PT_F48,       [UNW_IA64_FR + 49]      = PT_F49,
+    [UNW_IA64_FR + 50]  = PT_F50,       [UNW_IA64_FR + 51]      = PT_F51,
+    [UNW_IA64_FR + 52]  = PT_F52,       [UNW_IA64_FR + 53]      = PT_F53,
+    [UNW_IA64_FR + 54]  = PT_F54,       [UNW_IA64_FR + 55]      = PT_F55,
+    [UNW_IA64_FR + 56]  = PT_F56,       [UNW_IA64_FR + 57]      = PT_F57,
+    [UNW_IA64_FR + 58]  = PT_F58,       [UNW_IA64_FR + 59]      = PT_F59,
+    [UNW_IA64_FR + 60]  = PT_F60,       [UNW_IA64_FR + 61]      = PT_F61,
+    [UNW_IA64_FR + 62]  = PT_F62,       [UNW_IA64_FR + 63]      = PT_F63,
+    [UNW_IA64_FR + 64]  = PT_F64,       [UNW_IA64_FR + 65]      = PT_F65,
+    [UNW_IA64_FR + 66]  = PT_F66,       [UNW_IA64_FR + 67]      = PT_F67,
+    [UNW_IA64_FR + 68]  = PT_F68,       [UNW_IA64_FR + 69]      = PT_F69,
+    [UNW_IA64_FR + 70]  = PT_F70,       [UNW_IA64_FR + 71]      = PT_F71,
+    [UNW_IA64_FR + 72]  = PT_F72,       [UNW_IA64_FR + 73]      = PT_F73,
+    [UNW_IA64_FR + 74]  = PT_F74,       [UNW_IA64_FR + 75]      = PT_F75,
+    [UNW_IA64_FR + 76]  = PT_F76,       [UNW_IA64_FR + 77]      = PT_F77,
+    [UNW_IA64_FR + 78]  = PT_F78,       [UNW_IA64_FR + 79]      = PT_F79,
+    [UNW_IA64_FR + 80]  = PT_F80,       [UNW_IA64_FR + 81]      = PT_F81,
+    [UNW_IA64_FR + 82]  = PT_F82,       [UNW_IA64_FR + 83]      = PT_F83,
+    [UNW_IA64_FR + 84]  = PT_F84,       [UNW_IA64_FR + 85]      = PT_F85,
+    [UNW_IA64_FR + 86]  = PT_F86,       [UNW_IA64_FR + 87]      = PT_F87,
+    [UNW_IA64_FR + 88]  = PT_F88,       [UNW_IA64_FR + 89]      = PT_F89,
+    [UNW_IA64_FR + 90]  = PT_F90,       [UNW_IA64_FR + 91]      = PT_F91,
+    [UNW_IA64_FR + 92]  = PT_F92,       [UNW_IA64_FR + 93]      = PT_F93,
+    [UNW_IA64_FR + 94]  = PT_F94,       [UNW_IA64_FR + 95]      = PT_F95,
+    [UNW_IA64_FR + 96]  = PT_F96,       [UNW_IA64_FR + 97]      = PT_F97,
+    [UNW_IA64_FR + 98]  = PT_F98,       [UNW_IA64_FR + 99]      = PT_F99,
+    [UNW_IA64_FR +100]  = PT_F100,      [UNW_IA64_FR +101]      = PT_F101,
+    [UNW_IA64_FR +102]  = PT_F102,      [UNW_IA64_FR +103]      = PT_F103,
+    [UNW_IA64_FR +104]  = PT_F104,      [UNW_IA64_FR +105]      = PT_F105,
+    [UNW_IA64_FR +106]  = PT_F106,      [UNW_IA64_FR +107]      = PT_F107,
+    [UNW_IA64_FR +108]  = PT_F108,      [UNW_IA64_FR +109]      = PT_F109,
+    [UNW_IA64_FR +110]  = PT_F110,      [UNW_IA64_FR +111]      = PT_F111,
+    [UNW_IA64_FR +112]  = PT_F112,      [UNW_IA64_FR +113]      = PT_F113,
+    [UNW_IA64_FR +114]  = PT_F114,      [UNW_IA64_FR +115]      = PT_F115,
+    [UNW_IA64_FR +116]  = PT_F116,      [UNW_IA64_FR +117]      = PT_F117,
+    [UNW_IA64_FR +118]  = PT_F118,      [UNW_IA64_FR +119]      = PT_F119,
+    [UNW_IA64_FR +120]  = PT_F120,      [UNW_IA64_FR +121]      = PT_F121,
+    [UNW_IA64_FR +122]  = PT_F122,      [UNW_IA64_FR +123]      = PT_F123,
+    [UNW_IA64_FR +124]  = PT_F124,      [UNW_IA64_FR +125]      = PT_F125,
+    [UNW_IA64_FR +126]  = PT_F126,      [UNW_IA64_FR +127]      = PT_F127,
+
+    [UNW_IA64_AR +  0]  = -1,           [UNW_IA64_AR +  1]      = -1,
+    [UNW_IA64_AR +  2]  = -1,           [UNW_IA64_AR +  3]      = -1,
+    [UNW_IA64_AR +  4]  = -1,           [UNW_IA64_AR +  5]      = -1,
+    [UNW_IA64_AR +  6]  = -1,           [UNW_IA64_AR +  7]      = -1,
+    [UNW_IA64_AR +  8]  = -1,           [UNW_IA64_AR +  9]      = -1,
+    [UNW_IA64_AR + 10]  = -1,           [UNW_IA64_AR + 11]      = -1,
+    [UNW_IA64_AR + 12]  = -1,           [UNW_IA64_AR + 13]      = -1,
+    [UNW_IA64_AR + 14]  = -1,           [UNW_IA64_AR + 15]      = -1,
+    [UNW_IA64_AR + 16]  = PT_AR_RSC,    [UNW_IA64_AR + 17]      = PT_AR_BSP,
+    [UNW_IA64_AR + 18]  = PT_AR_BSPSTORE,[UNW_IA64_AR + 19]     = PT_AR_RNAT,
+    [UNW_IA64_AR + 20]  = -1,           [UNW_IA64_AR + 21]      = -1,
+    [UNW_IA64_AR + 22]  = -1,           [UNW_IA64_AR + 23]      = -1,
+    [UNW_IA64_AR + 24]  = -1,           [UNW_IA64_AR + 25]      = PT_AR_CSD,
+    [UNW_IA64_AR + 26]  = -1,           [UNW_IA64_AR + 27]      = -1,
+    [UNW_IA64_AR + 28]  = -1,           [UNW_IA64_AR + 29]      = -1,
+    [UNW_IA64_AR + 30]  = -1,           [UNW_IA64_AR + 31]      = -1,
+    [UNW_IA64_AR + 32]  = PT_AR_CCV,    [UNW_IA64_AR + 33]      = -1,
+    [UNW_IA64_AR + 34]  = -1,           [UNW_IA64_AR + 35]      = -1,
+    [UNW_IA64_AR + 36]  = PT_AR_UNAT,   [UNW_IA64_AR + 37]      = -1,
+    [UNW_IA64_AR + 38]  = -1,           [UNW_IA64_AR + 39]      = -1,
+    [UNW_IA64_AR + 40]  = PT_AR_FPSR,   [UNW_IA64_AR + 41]      = -1,
+    [UNW_IA64_AR + 42]  = -1,           [UNW_IA64_AR + 43]      = -1,
+    [UNW_IA64_AR + 44]  = -1,           [UNW_IA64_AR + 45]      = -1,
+    [UNW_IA64_AR + 46]  = -1,           [UNW_IA64_AR + 47]      = -1,
+    [UNW_IA64_AR + 48]  = -1,           [UNW_IA64_AR + 49]      = -1,
+    [UNW_IA64_AR + 50]  = -1,           [UNW_IA64_AR + 51]      = -1,
+    [UNW_IA64_AR + 52]  = -1,           [UNW_IA64_AR + 53]      = -1,
+    [UNW_IA64_AR + 54]  = -1,           [UNW_IA64_AR + 55]      = -1,
+    [UNW_IA64_AR + 56]  = -1,           [UNW_IA64_AR + 57]      = -1,
+    [UNW_IA64_AR + 58]  = -1,           [UNW_IA64_AR + 59]      = -1,
+    [UNW_IA64_AR + 60]  = -1,           [UNW_IA64_AR + 61]      = -1,
+    [UNW_IA64_AR + 62]  = -1,           [UNW_IA64_AR + 63]      = -1,
+    [UNW_IA64_AR + 64]  = PT_AR_PFS,    [UNW_IA64_AR + 65]      = PT_AR_LC,
+    [UNW_IA64_AR + 66]  = PT_AR_EC,     [UNW_IA64_AR + 67]      = -1,
+    [UNW_IA64_AR + 68]  = -1,           [UNW_IA64_AR + 69]      = -1,
+    [UNW_IA64_AR + 70]  = -1,           [UNW_IA64_AR + 71]      = -1,
+    [UNW_IA64_AR + 72]  = -1,           [UNW_IA64_AR + 73]      = -1,
+    [UNW_IA64_AR + 74]  = -1,           [UNW_IA64_AR + 75]      = -1,
+    [UNW_IA64_AR + 76]  = -1,           [UNW_IA64_AR + 77]      = -1,
+    [UNW_IA64_AR + 78]  = -1,           [UNW_IA64_AR + 79]      = -1,
+    [UNW_IA64_AR + 80]  = -1,           [UNW_IA64_AR + 81]      = -1,
+    [UNW_IA64_AR + 82]  = -1,           [UNW_IA64_AR + 83]      = -1,
+    [UNW_IA64_AR + 84]  = -1,           [UNW_IA64_AR + 85]      = -1,
+    [UNW_IA64_AR + 86]  = -1,           [UNW_IA64_AR + 87]      = -1,
+    [UNW_IA64_AR + 88]  = -1,           [UNW_IA64_AR + 89]      = -1,
+    [UNW_IA64_AR + 90]  = -1,           [UNW_IA64_AR + 91]      = -1,
+    [UNW_IA64_AR + 92]  = -1,           [UNW_IA64_AR + 93]      = -1,
+    [UNW_IA64_AR + 94]  = -1,           [UNW_IA64_AR + 95]      = -1,
+    [UNW_IA64_AR + 96]  = -1,           [UNW_IA64_AR + 97]      = -1,
+    [UNW_IA64_AR + 98]  = -1,           [UNW_IA64_AR + 99]      = -1,
+    [UNW_IA64_AR +100]  = -1,           [UNW_IA64_AR +101]      = -1,
+    [UNW_IA64_AR +102]  = -1,           [UNW_IA64_AR +103]      = -1,
+    [UNW_IA64_AR +104]  = -1,           [UNW_IA64_AR +105]      = -1,
+    [UNW_IA64_AR +106]  = -1,           [UNW_IA64_AR +107]      = -1,
+    [UNW_IA64_AR +108]  = -1,           [UNW_IA64_AR +109]      = -1,
+    [UNW_IA64_AR +110]  = -1,           [UNW_IA64_AR +111]      = -1,
+    [UNW_IA64_AR +112]  = -1,           [UNW_IA64_AR +113]      = -1,
+    [UNW_IA64_AR +114]  = -1,           [UNW_IA64_AR +115]      = -1,
+    [UNW_IA64_AR +116]  = -1,           [UNW_IA64_AR +117]      = -1,
+    [UNW_IA64_AR +118]  = -1,           [UNW_IA64_AR +119]      = -1,
+    [UNW_IA64_AR +120]  = -1,           [UNW_IA64_AR +121]      = -1,
+    [UNW_IA64_AR +122]  = -1,           [UNW_IA64_AR +123]      = -1,
+    [UNW_IA64_AR +124]  = -1,           [UNW_IA64_AR +125]      = -1,
+    [UNW_IA64_AR +126]  = -1,           [UNW_IA64_AR +127]      = -1,
+
+    [UNW_IA64_BR +  0]  = PT_B0,        [UNW_IA64_BR +  1]      = PT_B1,
+    [UNW_IA64_BR +  2]  = PT_B2,        [UNW_IA64_BR +  3]      = PT_B3,
+    [UNW_IA64_BR +  4]  = PT_B4,        [UNW_IA64_BR +  5]      = PT_B5,
+    [UNW_IA64_BR +  6]  = PT_B6,        [UNW_IA64_BR +  7]      = PT_B7,
+
+    [UNW_IA64_PR]       = PT_PR,
+    [UNW_IA64_CFM]      = PT_CFM,
+    [UNW_IA64_IP]       = PT_CR_IIP
+#elif defined(HAVE_TTRACE)
+# warning No support for ttrace() yet.
+#elif defined(UNW_TARGET_HPPA)
+    [UNW_HPPA_GR +  0]  = 0x000,        [UNW_HPPA_GR +  1]      = 0x004,
+    [UNW_HPPA_GR +  2]  = 0x008,        [UNW_HPPA_GR +  3]      = 0x00c,
+    [UNW_HPPA_GR +  4]  = 0x010,        [UNW_HPPA_GR +  5]      = 0x014,
+    [UNW_HPPA_GR +  6]  = 0x018,        [UNW_HPPA_GR +  7]      = 0x01c,
+    [UNW_HPPA_GR +  8]  = 0x020,        [UNW_HPPA_GR +  9]      = 0x024,
+    [UNW_HPPA_GR + 10]  = 0x028,        [UNW_HPPA_GR + 11]      = 0x02c,
+    [UNW_HPPA_GR + 12]  = 0x030,        [UNW_HPPA_GR + 13]      = 0x034,
+    [UNW_HPPA_GR + 14]  = 0x038,        [UNW_HPPA_GR + 15]      = 0x03c,
+    [UNW_HPPA_GR + 16]  = 0x040,        [UNW_HPPA_GR + 17]      = 0x044,
+    [UNW_HPPA_GR + 18]  = 0x048,        [UNW_HPPA_GR + 19]      = 0x04c,
+    [UNW_HPPA_GR + 20]  = 0x050,        [UNW_HPPA_GR + 21]      = 0x054,
+    [UNW_HPPA_GR + 22]  = 0x058,        [UNW_HPPA_GR + 23]      = 0x05c,
+    [UNW_HPPA_GR + 24]  = 0x060,        [UNW_HPPA_GR + 25]      = 0x064,
+    [UNW_HPPA_GR + 26]  = 0x068,        [UNW_HPPA_GR + 27]      = 0x06c,
+    [UNW_HPPA_GR + 28]  = 0x070,        [UNW_HPPA_GR + 29]      = 0x074,
+    [UNW_HPPA_GR + 30]  = 0x078,        [UNW_HPPA_GR + 31]      = 0x07c,
+
+    [UNW_HPPA_FR +  0]  = 0x080,        [UNW_HPPA_FR +  1]      = 0x088,
+    [UNW_HPPA_FR +  2]  = 0x090,        [UNW_HPPA_FR +  3]      = 0x098,
+    [UNW_HPPA_FR +  4]  = 0x0a0,        [UNW_HPPA_FR +  5]      = 0x0a8,
+    [UNW_HPPA_FR +  6]  = 0x0b0,        [UNW_HPPA_FR +  7]      = 0x0b8,
+    [UNW_HPPA_FR +  8]  = 0x0c0,        [UNW_HPPA_FR +  9]      = 0x0c8,
+    [UNW_HPPA_FR + 10]  = 0x0d0,        [UNW_HPPA_FR + 11]      = 0x0d8,
+    [UNW_HPPA_FR + 12]  = 0x0e0,        [UNW_HPPA_FR + 13]      = 0x0e8,
+    [UNW_HPPA_FR + 14]  = 0x0f0,        [UNW_HPPA_FR + 15]      = 0x0f8,
+    [UNW_HPPA_FR + 16]  = 0x100,        [UNW_HPPA_FR + 17]      = 0x108,
+    [UNW_HPPA_FR + 18]  = 0x110,        [UNW_HPPA_FR + 19]      = 0x118,
+    [UNW_HPPA_FR + 20]  = 0x120,        [UNW_HPPA_FR + 21]      = 0x128,
+    [UNW_HPPA_FR + 22]  = 0x130,        [UNW_HPPA_FR + 23]      = 0x138,
+    [UNW_HPPA_FR + 24]  = 0x140,        [UNW_HPPA_FR + 25]      = 0x148,
+    [UNW_HPPA_FR + 26]  = 0x150,        [UNW_HPPA_FR + 27]      = 0x158,
+    [UNW_HPPA_FR + 28]  = 0x160,        [UNW_HPPA_FR + 29]      = 0x168,
+    [UNW_HPPA_FR + 30]  = 0x170,        [UNW_HPPA_FR + 31]      = 0x178,
+
+    [UNW_HPPA_IP]       = 0x1a8         /* IAOQ[0] */
+#elif defined(UNW_TARGET_X86)
+#if defined __FreeBSD__
+#define UNW_R_OFF(R, r) \
+    [UNW_X86_##R]       = offsetof(gregset_t, r_##r),
+    UNW_R_OFF(EAX, eax)
+    UNW_R_OFF(EDX, edx)
+    UNW_R_OFF(ECX, ecx)
+    UNW_R_OFF(EBX, ebx)
+    UNW_R_OFF(ESI, esi)
+    UNW_R_OFF(EDI, edi)
+    UNW_R_OFF(EBP, ebp)
+    UNW_R_OFF(ESP, esp)
+    UNW_R_OFF(EIP, eip)
+//  UNW_R_OFF(CS, cs)
+//  UNW_R_OFF(EFLAGS, eflags)
+//  UNW_R_OFF(SS, ss)
+#elif defined __linux__
+    [UNW_X86_EAX]       = 0x18,
+    [UNW_X86_EBX]       = 0x00,
+    [UNW_X86_ECX]       = 0x04,
+    [UNW_X86_EDX]       = 0x08,
+    [UNW_X86_ESI]       = 0x0c,
+    [UNW_X86_EDI]       = 0x10,
+    [UNW_X86_EBP]       = 0x14,
+    [UNW_X86_EIP]       = 0x30,
+    [UNW_X86_ESP]       = 0x3c
+/*  CS                  = 0x34, */
+/*  DS                  = 0x1c, */
+/*  ES                  = 0x20, */
+/*  FS                  = 0x24, */
+/*  GS                  = 0x28, */
+/*  ORIG_EAX            = 0x2c, */
+/*  EFLAGS              = 0x38, */
+/*  SS                  = 0x40 */
+#else
+#error Port me
+#endif
+#elif defined(UNW_TARGET_X86_64)
+#if defined __FreeBSD__
+#define UNW_R_OFF(R, r) \
+    [UNW_X86_64_##R]    = offsetof(gregset_t, r_##r),
+    UNW_R_OFF(RAX, rax)
+    UNW_R_OFF(RDX, rdx)
+    UNW_R_OFF(RCX, rcx)
+    UNW_R_OFF(RBX, rbx)
+    UNW_R_OFF(RSI, rsi)
+    UNW_R_OFF(RDI, rdi)
+    UNW_R_OFF(RBP, rbp)
+    UNW_R_OFF(RSP, rsp)
+    UNW_R_OFF(R8, r8)
+    UNW_R_OFF(R9, r9)
+    UNW_R_OFF(R10, r10)
+    UNW_R_OFF(R11, r11)
+    UNW_R_OFF(R12, r12)
+    UNW_R_OFF(R13, r13)
+    UNW_R_OFF(R14, r14)
+    UNW_R_OFF(R15, r15)
+    UNW_R_OFF(RIP, rip)
+//  UNW_R_OFF(CS, cs)
+//  UNW_R_OFF(EFLAGS, rflags)
+//  UNW_R_OFF(SS, ss)
+#undef UNW_R_OFF
+#elif defined __linux__
+    [UNW_X86_64_RAX]    = 0x50,
+    [UNW_X86_64_RDX]    = 0x60,
+    [UNW_X86_64_RCX]    = 0x58,
+    [UNW_X86_64_RBX]    = 0x28,
+    [UNW_X86_64_RSI]    = 0x68,
+    [UNW_X86_64_RDI]    = 0x70,
+    [UNW_X86_64_RBP]    = 0x20,
+    [UNW_X86_64_RSP]    = 0x98,
+    [UNW_X86_64_R8]     = 0x48,
+    [UNW_X86_64_R9]     = 0x40,
+    [UNW_X86_64_R10]    = 0x38,
+    [UNW_X86_64_R11]    = 0x30,
+    [UNW_X86_64_R12]    = 0x18,
+    [UNW_X86_64_R13]    = 0x10,
+    [UNW_X86_64_R14]    = 0x08,
+    [UNW_X86_64_R15]    = 0x00,
+    [UNW_X86_64_RIP]    = 0x80
+//  [UNW_X86_64_CS]     = 0x88,
+//  [UNW_X86_64_EFLAGS] = 0x90,
+//  [UNW_X86_64_RSP]    = 0x98,
+//  [UNW_X86_64_SS]     = 0xa0
+#else
+#error Port me
+#endif
+#elif defined(UNW_TARGET_PPC32) || defined(UNW_TARGET_PPC64)
+
+#define UNW_REG_SLOT_SIZE sizeof(unsigned long)
+#define UNW_PPC_R(v) ((v) * UNW_REG_SLOT_SIZE)
+#define UNW_PPC_PT(p) UNW_PPC_R(PT_##p)
+
+#define UNW_FP_OFF(b, i)    \
+    [UNW_PPC##b##_F##i] = UNW_PPC_R(PT_FPR0 + i * 8/UNW_REG_SLOT_SIZE)
+
+#define UNW_R_OFF(b, i) \
+    [UNW_PPC##b##_R##i] = UNW_PPC_R(PT_R##i)
+
+#define UNW_PPC_REGS(b) \
+    UNW_R_OFF(b, 0),    \
+    UNW_R_OFF(b, 1),    \
+    UNW_R_OFF(b, 2),    \
+    UNW_R_OFF(b, 3),    \
+    UNW_R_OFF(b, 4),    \
+    UNW_R_OFF(b, 5),    \
+    UNW_R_OFF(b, 6),    \
+    UNW_R_OFF(b, 7),    \
+    UNW_R_OFF(b, 8),    \
+    UNW_R_OFF(b, 9),    \
+    UNW_R_OFF(b, 10),   \
+    UNW_R_OFF(b, 11),   \
+    UNW_R_OFF(b, 12),   \
+    UNW_R_OFF(b, 13),   \
+    UNW_R_OFF(b, 14),   \
+    UNW_R_OFF(b, 15),   \
+    UNW_R_OFF(b, 16),   \
+    UNW_R_OFF(b, 17),   \
+    UNW_R_OFF(b, 18),   \
+    UNW_R_OFF(b, 19),   \
+    UNW_R_OFF(b, 20),   \
+    UNW_R_OFF(b, 21),   \
+    UNW_R_OFF(b, 22),   \
+    UNW_R_OFF(b, 23),   \
+    UNW_R_OFF(b, 24),   \
+    UNW_R_OFF(b, 25),   \
+    UNW_R_OFF(b, 26),   \
+    UNW_R_OFF(b, 27),   \
+    UNW_R_OFF(b, 28),   \
+    UNW_R_OFF(b, 29),   \
+    UNW_R_OFF(b, 30),   \
+    UNW_R_OFF(b, 31),   \
+                               \
+    [UNW_PPC##b##_CTR] = UNW_PPC_PT(CTR), \
+    [UNW_PPC##b##_XER] = UNW_PPC_PT(XER), \
+    [UNW_PPC##b##_LR]  = UNW_PPC_PT(LNK), \
+                               \
+    UNW_FP_OFF(b, 0), \
+    UNW_FP_OFF(b, 1), \
+    UNW_FP_OFF(b, 2), \
+    UNW_FP_OFF(b, 3), \
+    UNW_FP_OFF(b, 4), \
+    UNW_FP_OFF(b, 5), \
+    UNW_FP_OFF(b, 6), \
+    UNW_FP_OFF(b, 7), \
+    UNW_FP_OFF(b, 8), \
+    UNW_FP_OFF(b, 9), \
+    UNW_FP_OFF(b, 10), \
+    UNW_FP_OFF(b, 11), \
+    UNW_FP_OFF(b, 12), \
+    UNW_FP_OFF(b, 13), \
+    UNW_FP_OFF(b, 14), \
+    UNW_FP_OFF(b, 15), \
+    UNW_FP_OFF(b, 16), \
+    UNW_FP_OFF(b, 17), \
+    UNW_FP_OFF(b, 18), \
+    UNW_FP_OFF(b, 19), \
+    UNW_FP_OFF(b, 20), \
+    UNW_FP_OFF(b, 21), \
+    UNW_FP_OFF(b, 22), \
+    UNW_FP_OFF(b, 23), \
+    UNW_FP_OFF(b, 24), \
+    UNW_FP_OFF(b, 25), \
+    UNW_FP_OFF(b, 26), \
+    UNW_FP_OFF(b, 27), \
+    UNW_FP_OFF(b, 28), \
+    UNW_FP_OFF(b, 29), \
+    UNW_FP_OFF(b, 30), \
+    UNW_FP_OFF(b, 31)
+
+#define UNW_PPC32_REGS \
+    [UNW_PPC32_FPSCR] = UNW_PPC_PT(FPSCR), \
+    [UNW_PPC32_CCR] = UNW_PPC_PT(CCR)
+
+#define UNW_VR_OFF(i)   \
+    [UNW_PPC64_V##i] = UNW_PPC_R(PT_VR0 + i * 2)
+
+#define UNW_PPC64_REGS \
+    [UNW_PPC64_NIP] = UNW_PPC_PT(NIP), \
+    [UNW_PPC64_FRAME_POINTER] = -1, \
+    [UNW_PPC64_ARG_POINTER] = -1,   \
+    [UNW_PPC64_CR0] = -1,           \
+    [UNW_PPC64_CR1] = -1,           \
+    [UNW_PPC64_CR2] = -1,           \
+    [UNW_PPC64_CR3] = -1,           \
+    [UNW_PPC64_CR4] = -1,           \
+    [UNW_PPC64_CR5] = -1,           \
+    [UNW_PPC64_CR6] = -1,           \
+    [UNW_PPC64_CR7] = -1,           \
+    [UNW_PPC64_VRSAVE] = UNW_PPC_PT(VRSAVE), \
+    [UNW_PPC64_VSCR] = UNW_PPC_PT(VSCR),     \
+    [UNW_PPC64_SPE_ACC] = -1,       \
+    [UNW_PPC64_SPEFSCR] = -1,       \
+    UNW_VR_OFF(0), \
+    UNW_VR_OFF(1), \
+    UNW_VR_OFF(2), \
+    UNW_VR_OFF(3), \
+    UNW_VR_OFF(4), \
+    UNW_VR_OFF(5), \
+    UNW_VR_OFF(6), \
+    UNW_VR_OFF(7), \
+    UNW_VR_OFF(8), \
+    UNW_VR_OFF(9), \
+    UNW_VR_OFF(10), \
+    UNW_VR_OFF(11), \
+    UNW_VR_OFF(12), \
+    UNW_VR_OFF(13), \
+    UNW_VR_OFF(14), \
+    UNW_VR_OFF(15), \
+    UNW_VR_OFF(16), \
+    UNW_VR_OFF(17), \
+    UNW_VR_OFF(18), \
+    UNW_VR_OFF(19), \
+    UNW_VR_OFF(20), \
+    UNW_VR_OFF(21), \
+    UNW_VR_OFF(22), \
+    UNW_VR_OFF(23), \
+    UNW_VR_OFF(24), \
+    UNW_VR_OFF(25), \
+    UNW_VR_OFF(26), \
+    UNW_VR_OFF(27), \
+    UNW_VR_OFF(28), \
+    UNW_VR_OFF(29), \
+    UNW_VR_OFF(30), \
+    UNW_VR_OFF(31)
+
+#if defined(UNW_TARGET_PPC32)
+    UNW_PPC_REGS(32),
+    UNW_PPC32_REGS,
+#else
+    UNW_PPC_REGS(64),
+    UNW_PPC64_REGS,
+#endif
+
+#elif defined(UNW_TARGET_ARM)
+#if defined(__linux__) || defined(__FreeBSD__)
+    [UNW_ARM_R0]       = 0x00,
+    [UNW_ARM_R1]       = 0x04,
+    [UNW_ARM_R2]       = 0x08,
+    [UNW_ARM_R3]       = 0x0c,
+    [UNW_ARM_R4]       = 0x10,
+    [UNW_ARM_R5]       = 0x14,
+    [UNW_ARM_R6]       = 0x18,
+    [UNW_ARM_R7]       = 0x1c,
+    [UNW_ARM_R8]       = 0x20,
+    [UNW_ARM_R9]       = 0x24,
+    [UNW_ARM_R10]      = 0x28,
+    [UNW_ARM_R11]      = 0x2c,
+    [UNW_ARM_R12]      = 0x30,
+    [UNW_ARM_R13]      = 0x34,
+    [UNW_ARM_R14]      = 0x38,
+    [UNW_ARM_R15]      = 0x3c,
+#else
+#error Fix me
+#endif
+#elif defined(UNW_TARGET_MIPS)
+    [UNW_MIPS_R0]  =  0,
+    [UNW_MIPS_R1]  =  1,
+    [UNW_MIPS_R2]  =  2,
+    [UNW_MIPS_R3]  =  3,
+    [UNW_MIPS_R4]  =  4,
+    [UNW_MIPS_R5]  =  5,
+    [UNW_MIPS_R6]  =  6,
+    [UNW_MIPS_R7]  =  7,
+    [UNW_MIPS_R8]  =  8,
+    [UNW_MIPS_R9]  =  9,
+    [UNW_MIPS_R10] = 10,
+    [UNW_MIPS_R11] = 11,
+    [UNW_MIPS_R12] = 12,
+    [UNW_MIPS_R13] = 13,
+    [UNW_MIPS_R14] = 14,
+    [UNW_MIPS_R15] = 15,
+    [UNW_MIPS_R16] = 16,
+    [UNW_MIPS_R17] = 17,
+    [UNW_MIPS_R18] = 18,
+    [UNW_MIPS_R19] = 19,
+    [UNW_MIPS_R20] = 20,
+    [UNW_MIPS_R21] = 21,
+    [UNW_MIPS_R22] = 22,
+    [UNW_MIPS_R23] = 23,
+    [UNW_MIPS_R24] = 24,
+    [UNW_MIPS_R25] = 25,
+    [UNW_MIPS_R26] = 26,
+    [UNW_MIPS_R27] = 27,
+    [UNW_MIPS_R28] = 28,
+    [UNW_MIPS_R29] = 29,
+    [UNW_MIPS_R30] = 30,
+    [UNW_MIPS_R31] = 31,
+    [UNW_MIPS_PC]  = 64,
+#elif defined(UNW_TARGET_SH)
+#elif defined(UNW_TARGET_AARCH64)
+    [UNW_AARCH64_X0]       = 0x00,
+    [UNW_AARCH64_X1]       = 0x08,
+    [UNW_AARCH64_X2]       = 0x10,
+    [UNW_AARCH64_X3]       = 0x18,
+    [UNW_AARCH64_X4]       = 0x20,
+    [UNW_AARCH64_X5]       = 0x28,
+    [UNW_AARCH64_X6]       = 0x30,
+    [UNW_AARCH64_X7]       = 0x38,
+    [UNW_AARCH64_X8]       = 0x40,
+    [UNW_AARCH64_X9]       = 0x48,
+    [UNW_AARCH64_X10]      = 0x50,
+    [UNW_AARCH64_X11]      = 0x58,
+    [UNW_AARCH64_X12]      = 0x60,
+    [UNW_AARCH64_X13]      = 0x68,
+    [UNW_AARCH64_X14]      = 0x70,
+    [UNW_AARCH64_X15]      = 0x78,
+    [UNW_AARCH64_X16]      = 0x80,
+    [UNW_AARCH64_X17]      = 0x88,
+    [UNW_AARCH64_X18]      = 0x90,
+    [UNW_AARCH64_X19]      = 0x98,
+    [UNW_AARCH64_X20]      = 0xa0,
+    [UNW_AARCH64_X21]      = 0xa8,
+    [UNW_AARCH64_X22]      = 0xb0,
+    [UNW_AARCH64_X23]      = 0xb8,
+    [UNW_AARCH64_X24]      = 0xc0,
+    [UNW_AARCH64_X25]      = 0xc8,
+    [UNW_AARCH64_X26]      = 0xd0,
+    [UNW_AARCH64_X27]      = 0xd8,
+    [UNW_AARCH64_X28]      = 0xe0,
+    [UNW_AARCH64_X29]      = 0xe8,
+    [UNW_AARCH64_X30]      = 0xf0,
+    [UNW_AARCH64_SP]       = 0xf8,
+    [UNW_AARCH64_PC]       = 0x100,
+    [UNW_AARCH64_PSTATE]   = 0x108
+#elif defined(UNW_TARGET_TILEGX)
+    [UNW_TILEGX_R0]    = 0x00,
+    [UNW_TILEGX_R1]    = 0x08,
+    [UNW_TILEGX_R2]    = 0x10,
+    [UNW_TILEGX_R3]    = 0x08,
+    [UNW_TILEGX_R4]    = 0x20,
+    [UNW_TILEGX_R5]    = 0x28,
+    [UNW_TILEGX_R6]    = 0x30,
+    [UNW_TILEGX_R7]    = 0x38,
+    [UNW_TILEGX_R8]    = 0x40,
+    [UNW_TILEGX_R9]    = 0x48,
+    [UNW_TILEGX_R10]    = 0x50,
+    [UNW_TILEGX_R11]    = 0x58,
+    [UNW_TILEGX_R12]    = 0x60,
+    [UNW_TILEGX_R13]    = 0x68,
+    [UNW_TILEGX_R14]    = 0x70,
+    [UNW_TILEGX_R15]    = 0x78,
+    [UNW_TILEGX_R16]    = 0x80,
+    [UNW_TILEGX_R17]    = 0x88,
+    [UNW_TILEGX_R18]    = 0x90,
+    [UNW_TILEGX_R19]    = 0x98,
+    [UNW_TILEGX_R20]    = 0xa0,
+    [UNW_TILEGX_R21]    = 0xa8,
+    [UNW_TILEGX_R22]    = 0xb0,
+    [UNW_TILEGX_R23]    = 0xb8,
+    [UNW_TILEGX_R24]    = 0xc0,
+    [UNW_TILEGX_R25]    = 0xc8,
+    [UNW_TILEGX_R26]    = 0xd0,
+    [UNW_TILEGX_R27]    = 0xd8,
+    [UNW_TILEGX_R28]    = 0xe0,
+    [UNW_TILEGX_R29]    = 0xe8,
+    [UNW_TILEGX_R30]    = 0xf0,
+    [UNW_TILEGX_R31]    = 0xf8,
+    [UNW_TILEGX_R32]    = 0x100,
+    [UNW_TILEGX_R33]    = 0x108,
+    [UNW_TILEGX_R34]    = 0x110,
+    [UNW_TILEGX_R35]    = 0x118,
+    [UNW_TILEGX_R36]    = 0x120,
+    [UNW_TILEGX_R37]    = 0x128,
+    [UNW_TILEGX_R38]    = 0x130,
+    [UNW_TILEGX_R39]    = 0x138,
+    [UNW_TILEGX_R40]    = 0x140,
+    [UNW_TILEGX_R41]    = 0x148,
+    [UNW_TILEGX_R42]    = 0x150,
+    [UNW_TILEGX_R43]    = 0x158,
+    [UNW_TILEGX_R44]    = 0x160,
+    [UNW_TILEGX_R45]    = 0x168,
+    [UNW_TILEGX_R46]    = 0x170,
+    [UNW_TILEGX_R47]    = 0x178,
+    [UNW_TILEGX_R48]    = 0x180,
+    [UNW_TILEGX_R49]    = 0x188,
+    [UNW_TILEGX_R50]    = 0x190,
+    [UNW_TILEGX_R51]    = 0x198,
+    [UNW_TILEGX_R52]    = 0x1a0,
+    [UNW_TILEGX_R53]    = 0x1a8,
+    [UNW_TILEGX_R54]    = 0x1b0,
+    [UNW_TILEGX_R55]    = 0x1b8,
+    [UNW_TILEGX_PC]     = 0x1a0
+#elif defined(UNW_TARGET_S390X)
+    [UNW_S390X_R0]      = 0x10,
+    [UNW_S390X_R1]      = 0x18,
+    [UNW_S390X_R2]      = 0x20,
+    [UNW_S390X_R3]      = 0x28,
+    [UNW_S390X_R4]      = 0x30,
+    [UNW_S390X_R5]      = 0x38,
+    [UNW_S390X_R6]      = 0x40,
+    [UNW_S390X_R7]      = 0x48,
+    [UNW_S390X_R8]      = 0x50,
+    [UNW_S390X_R9]      = 0x58,
+    [UNW_S390X_R10]     = 0x60,
+    [UNW_S390X_R11]     = 0x68,
+    [UNW_S390X_R12]     = 0x70,
+    [UNW_S390X_R13]     = 0x78,
+    [UNW_S390X_R14]     = 0x80,
+    [UNW_S390X_R15]     = 0x88,
+    [UNW_S390X_F0]      = 0xe0,
+    [UNW_S390X_F1]      = 0xe8,
+    [UNW_S390X_F2]      = 0xf0,
+    [UNW_S390X_F3]      = 0xf8,
+    [UNW_S390X_F4]      = 0x100,
+    [UNW_S390X_F5]      = 0x108,
+    [UNW_S390X_F6]      = 0x110,
+    [UNW_S390X_F7]      = 0x118,
+    [UNW_S390X_F8]      = 0x120,
+    [UNW_S390X_F9]      = 0x128,
+    [UNW_S390X_F10]     = 0x130,
+    [UNW_S390X_F11]     = 0x138,
+    [UNW_S390X_F12]     = 0x140,
+    [UNW_S390X_F13]     = 0x148,
+    [UNW_S390X_F14]     = 0x150,
+    [UNW_S390X_F15]     = 0x150,
+    [UNW_S390X_IP]      = 0x08
+#else
+# error Fix me.
+#endif
+  };
diff --git a/src/third_party/unwind/dist/src/ptrace/_UPT_resume.c b/src/third_party/unwind/dist/src/ptrace/_UPT_resume.c
new file mode 100644
index 00000000000..d70a0d48218
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ptrace/_UPT_resume.c
@@ -0,0 +1,40 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "_UPT_internal.h"
+
+int
+_UPT_resume (unw_addr_space_t as, unw_cursor_t *c, void *arg)
+{
+  struct UPT_info *ui = arg;
+
+#ifdef HAVE_TTRACE
+# warning No support for ttrace() yet.
+#elif HAVE_DECL_PTRACE_CONT
+  return ptrace (PTRACE_CONT, ui->pid, 0, 0);
+#elif HAVE_DECL_PT_CONTINUE
+  return ptrace(PT_CONTINUE, ui->pid, (caddr_t)1, 0);
+#endif
+}
diff --git a/src/third_party/unwind/dist/src/ptrace/libunwind-ptrace.pc.in b/src/third_party/unwind/dist/src/ptrace/libunwind-ptrace.pc.in
new file mode 100644
index 00000000000..673004b69ef
--- /dev/null
+++ b/src/third_party/unwind/dist/src/ptrace/libunwind-ptrace.pc.in
@@ -0,0 +1,11 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: libunwind-ptrace
+Description: libunwind ptrace library
+Version: @VERSION@
+Requires: libunwind-generic libunwind
+Libs: -L${libdir} -lunwind-ptrace
+Cflags: -I${includedir}
diff --git a/src/third_party/unwind/dist/src/s390x/Gapply_reg_state.c b/src/third_party/unwind/dist/src/s390x/Gapply_reg_state.c
new file mode 100644
index 00000000000..82f056da67e
--- /dev/null
+++ b/src/third_party/unwind/dist/src/s390x/Gapply_reg_state.c
@@ -0,0 +1,37 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_apply_reg_state (unw_cursor_t *cursor,
+		     void *reg_states_data)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  return dwarf_apply_reg_state (&c->dwarf, (dwarf_reg_state_t *)reg_states_data);
+}
diff --git a/src/third_party/unwind/dist/src/s390x/Gcreate_addr_space.c b/src/third_party/unwind/dist/src/s390x/Gcreate_addr_space.c
new file mode 100644
index 00000000000..d411454932b
--- /dev/null
+++ b/src/third_party/unwind/dist/src/s390x/Gcreate_addr_space.c
@@ -0,0 +1,62 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+   Modified for s390x by Michael Munday <mike.munday@ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <stdlib.h>
+
+#include "unwind_i.h"
+
+#if defined(_BIG_ENDIAN) && !defined(__BIG_ENDIAN)
+#define __BIG_ENDIAN _BIG_ENDIAN
+#endif
+
+unw_addr_space_t
+unw_create_addr_space (unw_accessors_t *a, int byte_order)
+{
+#ifdef UNW_LOCAL_ONLY
+  return NULL;
+#else
+  unw_addr_space_t as;
+
+  /*
+   * s390x supports only big-endian.
+   */
+  if (byte_order != 0 && byte_order != __BIG_ENDIAN)
+    return NULL;
+
+  as = malloc (sizeof (*as));
+  if (!as)
+    return NULL;
+
+  memset (as, 0, sizeof (*as));
+
+  as->acc = *a;
+
+  return as;
+#endif
+}
diff --git a/src/third_party/unwind/dist/src/s390x/Gget_proc_info.c b/src/third_party/unwind/dist/src/s390x/Gget_proc_info.c
new file mode 100644
index 00000000000..50de1e423c2
--- /dev/null
+++ b/src/third_party/unwind/dist/src/s390x/Gget_proc_info.c
@@ -0,0 +1,48 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_get_proc_info (unw_cursor_t *cursor, unw_proc_info_t *pi)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  if (dwarf_make_proc_info (&c->dwarf) < 0)
+    {
+      /* On x86-64, some key routines such as _start() and _dl_start()
+         are missing DWARF unwind info.  We don't want to fail in that
+         case, because those frames are uninteresting and just mark
+         the end of the frame-chain anyhow.  */
+      memset (pi, 0, sizeof (*pi));
+      pi->start_ip = c->dwarf.ip;
+      pi->end_ip = c->dwarf.ip + 1;
+      return 0;
+    }
+  *pi = c->dwarf.pi;
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/s390x/Gget_save_loc.c b/src/third_party/unwind/dist/src/s390x/Gget_save_loc.c
new file mode 100644
index 00000000000..dc462c966e5
--- /dev/null
+++ b/src/third_party/unwind/dist/src/s390x/Gget_save_loc.c
@@ -0,0 +1,86 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+   Modified for s390x by Michael Munday <mike.munday@ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_get_save_loc (unw_cursor_t *cursor, int reg, unw_save_loc_t *sloc)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  dwarf_loc_t loc;
+
+  loc = DWARF_NULL_LOC;         /* default to "not saved" */
+
+  switch (reg)
+    {
+    case UNW_S390X_R6:
+    case UNW_S390X_R7:
+    case UNW_S390X_R8:
+    case UNW_S390X_R9:
+    case UNW_S390X_R10:
+    case UNW_S390X_R11:
+    case UNW_S390X_R12:
+    case UNW_S390X_R13:
+    case UNW_S390X_R15:
+    case UNW_S390X_F8:
+    case UNW_S390X_F9:
+    case UNW_S390X_F10:
+    case UNW_S390X_F11:
+    case UNW_S390X_F12:
+    case UNW_S390X_F13:
+    case UNW_S390X_F14:
+    case UNW_S390X_F15:
+      loc = c->dwarf.loc[reg];
+      break;
+
+    default:
+      break;
+    }
+
+  memset (sloc, 0, sizeof (*sloc));
+
+  if (DWARF_IS_NULL_LOC (loc))
+    {
+      sloc->type = UNW_SLT_NONE;
+      return 0;
+    }
+
+#if !defined(UNW_LOCAL_ONLY)
+  if (DWARF_IS_REG_LOC (loc))
+    {
+      sloc->type = UNW_SLT_REG;
+      sloc->u.regnum = DWARF_GET_LOC (loc);
+    }
+  else
+#endif
+    {
+      sloc->type = UNW_SLT_MEMORY;
+      sloc->u.addr = DWARF_GET_LOC (loc);
+    }
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/s390x/Gglobal.c b/src/third_party/unwind/dist/src/s390x/Gglobal.c
new file mode 100644
index 00000000000..e2abe89d307
--- /dev/null
+++ b/src/third_party/unwind/dist/src/s390x/Gglobal.c
@@ -0,0 +1,101 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2003, 2005 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+   Modified for s390x by Michael Munday <mike.munday@ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "config.h"
+#include "unwind_i.h"
+#include "dwarf_i.h"
+
+HIDDEN define_lock (s390x_lock);
+HIDDEN int tdep_init_done;
+
+/* The API register numbers are exactly the same as the .eh_frame
+   registers, for now at least.  */
+HIDDEN const uint8_t dwarf_to_unw_regnum_map[DWARF_NUM_PRESERVED_REGS] =
+  {
+    UNW_S390X_R0,
+    UNW_S390X_R1,
+    UNW_S390X_R2,
+    UNW_S390X_R3,
+    UNW_S390X_R4,
+    UNW_S390X_R5,
+    UNW_S390X_R6,
+    UNW_S390X_R7,
+    UNW_S390X_R8,
+    UNW_S390X_R9,
+    UNW_S390X_R10,
+    UNW_S390X_R11,
+    UNW_S390X_R12,
+    UNW_S390X_R13,
+    UNW_S390X_R14,
+    UNW_S390X_R15,
+
+    UNW_S390X_F0,
+    UNW_S390X_F2,
+    UNW_S390X_F4,
+    UNW_S390X_F6,
+    UNW_S390X_F1,
+    UNW_S390X_F3,
+    UNW_S390X_F5,
+    UNW_S390X_F7,
+    UNW_S390X_F8,
+    UNW_S390X_F10,
+    UNW_S390X_F12,
+    UNW_S390X_F14,
+    UNW_S390X_F9,
+    UNW_S390X_F11,
+    UNW_S390X_F13,
+    UNW_S390X_F15,
+  };
+
+HIDDEN void
+tdep_init (void)
+{
+  intrmask_t saved_mask;
+
+  sigfillset (&unwi_full_mask);
+
+  lock_acquire (&s390x_lock, saved_mask);
+  {
+    if (tdep_init_done)
+      /* another thread else beat us to it... */
+      goto out;
+
+    mi_init ();
+
+    dwarf_init ();
+
+    tdep_init_mem_validate ();
+
+#ifndef UNW_REMOTE_ONLY
+    s390x_local_addr_space_init ();
+#endif
+    tdep_init_done = 1; /* signal that we're initialized... */
+  }
+ out:
+  lock_release (&s390x_lock, saved_mask);
+}
diff --git a/src/third_party/unwind/dist/src/s390x/Ginit.c b/src/third_party/unwind/dist/src/s390x/Ginit.c
new file mode 100644
index 00000000000..f0886ac9337
--- /dev/null
+++ b/src/third_party/unwind/dist/src/s390x/Ginit.c
@@ -0,0 +1,366 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002 Hewlett-Packard Co
+   Copyright (C) 2007 David Mosberger-Tang
+        Contributed by David Mosberger-Tang <dmosberger@gmail.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+   Modified for s390x by Michael Munday <mike.munday@ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <sys/syscall.h>
+
+#include "unwind_i.h"
+
+#ifdef UNW_REMOTE_ONLY
+
+/* unw_local_addr_space is a NULL pointer in this case.  */
+unw_addr_space_t unw_local_addr_space;
+
+#else /* !UNW_REMOTE_ONLY */
+
+static struct unw_addr_space local_addr_space;
+
+unw_addr_space_t unw_local_addr_space = &local_addr_space;
+
+HIDDEN unw_dyn_info_list_t _U_dyn_info_list;
+
+static inline void *
+uc_addr (ucontext_t *uc, int reg)
+{
+  if (reg >= UNW_S390X_R0 && reg <= UNW_S390X_R15)
+    return &uc->uc_mcontext.gregs[reg - UNW_S390X_R0];
+  if (reg >= UNW_S390X_F0 && reg <= UNW_S390X_F15)
+    return &uc->uc_mcontext.fpregs.fprs[reg - UNW_S390X_F0];
+  if (reg == UNW_S390X_IP)
+    return &uc->uc_mcontext.psw.addr;
+
+  return NULL;
+}
+
+# ifdef UNW_LOCAL_ONLY
+
+HIDDEN void *
+tdep_uc_addr (ucontext_t *uc, int reg)
+{
+  return uc_addr (uc, reg);
+}
+
+# endif /* UNW_LOCAL_ONLY */
+
+/* XXX fix me: there is currently no way to locate the dyn-info list
+       by a remote unwinder.  On ia64, this is done via a special
+       unwind-table entry.  Perhaps something similar can be done with
+       DWARF2 unwind info.  */
+
+static void
+put_unwind_info (unw_addr_space_t as, unw_proc_info_t *proc_info, void *arg)
+{
+  /* it's a no-op */
+}
+
+static int
+get_dyn_info_list_addr (unw_addr_space_t as, unw_word_t *dyn_info_list_addr,
+                        void *arg)
+{
+  *dyn_info_list_addr = (unw_word_t) &_U_dyn_info_list;
+  return 0;
+}
+
+#define PAGE_SIZE 4096
+#define PAGE_START(a)   ((a) & ~(PAGE_SIZE-1))
+
+static int mem_validate_pipe[2] = {-1, -1};
+
+static inline void
+open_pipe (void)
+{
+  /* ignore errors for closing invalid fd's */
+  close (mem_validate_pipe[0]);
+  close (mem_validate_pipe[1]);
+
+  pipe2 (mem_validate_pipe, O_CLOEXEC | O_NONBLOCK);
+}
+
+ALWAYS_INLINE
+static int
+write_validate (void *addr)
+{
+  int ret = -1;
+  ssize_t bytes = 0;
+
+  do
+    {
+      char buf;
+      bytes = read (mem_validate_pipe[0], &buf, 1);
+    }
+  while ( errno == EINTR );
+
+  int valid_read = (bytes > 0 || errno == EAGAIN || errno == EWOULDBLOCK);
+  if (!valid_read)
+    {
+      // re-open closed pipe
+      open_pipe ();
+    }
+
+  do
+    {
+      /* use syscall insteadof write() so that ASAN does not complain */
+      ret = syscall (SYS_write, mem_validate_pipe[1], addr, 1);
+    }
+  while ( errno == EINTR );
+
+  return ret;
+}
+
+static int (*mem_validate_func) (void *addr, size_t len);
+static int msync_validate (void *addr, size_t len)
+{
+  if (msync (addr, len, MS_ASYNC) != 0)
+    {
+      return -1;
+    }
+
+  return write_validate (addr);
+}
+
+#ifdef HAVE_MINCORE
+static int mincore_validate (void *addr, size_t len)
+{
+  unsigned char mvec[2]; /* Unaligned access may cross page boundary */
+  size_t i;
+
+  /* mincore could fail with EAGAIN but we conservatively return -1
+     instead of looping. */
+  if (mincore (addr, len, mvec) != 0)
+    {
+      return -1;
+    }
+
+  for (i = 0; i < (len + PAGE_SIZE - 1) / PAGE_SIZE; i++)
+    {
+      if (!(mvec[i] & 1)) return -1;
+    }
+
+  return write_validate (addr);
+}
+#endif
+
+/* Initialise memory validation method. On linux kernels <2.6.21,
+   mincore() returns incorrect value for MAP_PRIVATE mappings,
+   such as stacks. If mincore() was available at compile time,
+   check if we can actually use it. If not, use msync() instead. */
+HIDDEN void
+tdep_init_mem_validate (void)
+{
+  open_pipe ();
+
+#ifdef HAVE_MINCORE
+  unsigned char present = 1;
+  unw_word_t addr = PAGE_START((unw_word_t)&present);
+  unsigned char mvec[1];
+  int ret;
+  while ((ret = mincore ((void*)addr, PAGE_SIZE, mvec)) == -1 &&
+         errno == EAGAIN) {}
+  if (ret == 0 && (mvec[0] & 1))
+    {
+      Debug(1, "using mincore to validate memory\n");
+      mem_validate_func = mincore_validate;
+    }
+  else
+#endif
+    {
+      Debug(1, "using msync to validate memory\n");
+      mem_validate_func = msync_validate;
+    }
+}
+
+/* Cache of already validated addresses */
+#define NLGA 4
+static unw_word_t last_good_addr[NLGA];
+static int lga_victim;
+
+static int
+validate_mem (unw_word_t addr)
+{
+  int i, victim;
+  size_t len;
+
+  if (PAGE_START(addr + sizeof (unw_word_t) - 1) == PAGE_START(addr))
+    len = PAGE_SIZE;
+  else
+    len = PAGE_SIZE * 2;
+
+  addr = PAGE_START(addr);
+
+  if (addr == 0)
+    return -1;
+
+  for (i = 0; i < NLGA; i++)
+    {
+      if (last_good_addr[i] && (addr == last_good_addr[i]))
+        return 0;
+    }
+
+  if (mem_validate_func ((void *) addr, len) == -1)
+    return -1;
+
+  victim = lga_victim;
+  for (i = 0; i < NLGA; i++) {
+    if (!last_good_addr[victim]) {
+      last_good_addr[victim++] = addr;
+      return 0;
+    }
+    victim = (victim + 1) % NLGA;
+  }
+
+  /* All slots full. Evict the victim. */
+  last_good_addr[victim] = addr;
+  victim = (victim + 1) % NLGA;
+  lga_victim = victim;
+
+  return 0;
+}
+
+static int
+access_mem (unw_addr_space_t as, unw_word_t addr, unw_word_t *val, int write,
+            void *arg)
+{
+  if (unlikely (write))
+    {
+      Debug (16, "mem[%016lx] <- %lx\n", addr, *val);
+      *(unw_word_t *) addr = *val;
+    }
+  else
+    {
+      /* validate address */
+      const struct cursor *c = (const struct cursor *)arg;
+      if (likely (c != NULL) && unlikely (c->validate)
+          && unlikely (validate_mem (addr))) {
+        Debug (16, "mem[%016lx] -> invalid\n", addr);
+        return -1;
+      }
+      *val = *(unw_word_t *) addr;
+      Debug (16, "mem[%016lx] -> %lx\n", addr, *val);
+    }
+  return 0;
+}
+
+static int
+access_reg (unw_addr_space_t as, unw_regnum_t reg, unw_word_t *val, int write,
+            void *arg)
+{
+  unw_word_t *addr;
+  ucontext_t *uc = ((struct cursor *)arg)->uc;
+
+  if (unw_is_fpreg (reg))
+    goto badreg;
+
+  if (!(addr = uc_addr (uc, reg)))
+    goto badreg;
+
+  if (write)
+    {
+      *(unw_word_t *) addr = *val;
+      Debug (12, "%s <- 0x%016lx\n", unw_regname (reg), *val);
+    }
+  else
+    {
+      *val = *(unw_word_t *) addr;
+      Debug (12, "%s -> 0x%016lx\n", unw_regname (reg), *val);
+    }
+  return 0;
+
+ badreg:
+  Debug (1, "bad register number %u\n", reg);
+  return -UNW_EBADREG;
+}
+
+static int
+access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val,
+              int write, void *arg)
+{
+  ucontext_t *uc = ((struct cursor *)arg)->uc;
+  unw_fpreg_t *addr;
+
+  if (!unw_is_fpreg (reg))
+    goto badreg;
+
+  if (!(addr = uc_addr (uc, reg)))
+    goto badreg;
+
+  if (write)
+    {
+      Debug (12, "%s <- %08lx.%08lx.%08lx\n", unw_regname (reg),
+             ((long *)val)[0], ((long *)val)[1], ((long *)val)[2]);
+      *(unw_fpreg_t *) addr = *val;
+    }
+  else
+    {
+      *val = *(unw_fpreg_t *) addr;
+      Debug (12, "%s -> %08lx.%08lx.%08lx\n", unw_regname (reg),
+             ((long *)val)[0], ((long *)val)[1], ((long *)val)[2]);
+    }
+  return 0;
+
+ badreg:
+  Debug (1, "bad register number %u\n", reg);
+  /* attempt to access a non-preserved register */
+  return -UNW_EBADREG;
+}
+
+static int
+get_static_proc_name (unw_addr_space_t as, unw_word_t ip,
+                      char *buf, size_t buf_len, unw_word_t *offp,
+                      void *arg)
+{
+  return _Uelf64_get_proc_name (as, getpid (), ip, buf, buf_len, offp);
+}
+
+HIDDEN void
+s390x_local_addr_space_init (void)
+{
+  memset (&local_addr_space, 0, sizeof (local_addr_space));
+  local_addr_space.caching_policy = UNW_CACHE_GLOBAL;
+  local_addr_space.acc.find_proc_info = dwarf_find_proc_info;
+  local_addr_space.acc.put_unwind_info = put_unwind_info;
+  local_addr_space.acc.get_dyn_info_list_addr = get_dyn_info_list_addr;
+  local_addr_space.acc.access_mem = access_mem;
+  local_addr_space.acc.access_reg = access_reg;
+  local_addr_space.acc.access_fpreg = access_fpreg;
+  local_addr_space.acc.resume = s390x_local_resume;
+  local_addr_space.acc.get_proc_name = get_static_proc_name;
+  unw_flush_cache (&local_addr_space, 0, 0);
+
+  memset (last_good_addr, 0, sizeof (unw_word_t) * NLGA);
+  lga_victim = 0;
+}
+
+#endif /* !UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/dist/src/s390x/Ginit_local.c b/src/third_party/unwind/dist/src/s390x/Ginit_local.c
new file mode 100644
index 00000000000..5eaead0f840
--- /dev/null
+++ b/src/third_party/unwind/dist/src/s390x/Ginit_local.c
@@ -0,0 +1,81 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "init.h"
+
+#ifdef UNW_REMOTE_ONLY
+
+int
+unw_init_local (unw_cursor_t *cursor, ucontext_t *uc)
+{
+  return -UNW_EINVAL;
+}
+
+#else /* !UNW_REMOTE_ONLY */
+
+static int
+unw_init_local_common (unw_cursor_t *cursor, ucontext_t *uc, unsigned use_prev_instr)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  if (unlikely (!tdep_init_done))
+    tdep_init ();
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  c->dwarf.as = unw_local_addr_space;
+  c->dwarf.as_arg = c;
+  c->uc = uc;
+  c->validate = 0;
+  return common_init (c, use_prev_instr);
+}
+
+int
+unw_init_local (unw_cursor_t *cursor, ucontext_t *uc)
+{
+  return unw_init_local_common(cursor, uc, 1);
+}
+
+int
+unw_init_local2 (unw_cursor_t *cursor, ucontext_t *uc, int flag)
+{
+  if (!flag)
+    {
+      return unw_init_local_common(cursor, uc, 1);
+    }
+  else if (flag == UNW_INIT_SIGNAL_FRAME)
+    {
+      return unw_init_local_common(cursor, uc, 0);
+    }
+  else
+    {
+      return -UNW_EINVAL;
+    }
+}
+
+#endif /* !UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/dist/src/s390x/Ginit_remote.c b/src/third_party/unwind/dist/src/s390x/Ginit_remote.c
new file mode 100644
index 00000000000..efd61d64d4b
--- /dev/null
+++ b/src/third_party/unwind/dist/src/s390x/Ginit_remote.c
@@ -0,0 +1,57 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "init.h"
+#include "unwind_i.h"
+
+int
+unw_init_remote (unw_cursor_t *cursor, unw_addr_space_t as, void *as_arg)
+{
+#ifdef UNW_LOCAL_ONLY
+  return -UNW_EINVAL;
+#else /* !UNW_LOCAL_ONLY */
+  struct cursor *c = (struct cursor *) cursor;
+
+  if (!tdep_init_done)
+    tdep_init ();
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  c->dwarf.as = as;
+  if (as == unw_local_addr_space)
+    {
+      c->dwarf.as_arg = c;
+      c->uc = as_arg;
+    }
+  else
+    {
+      c->dwarf.as_arg = as_arg;
+      c->uc = NULL;
+    }
+  return common_init (c, 0);
+#endif /* !UNW_LOCAL_ONLY */
+}
diff --git a/src/third_party/unwind/dist/src/s390x/Gis_signal_frame.c b/src/third_party/unwind/dist/src/s390x/Gis_signal_frame.c
new file mode 100644
index 00000000000..7ed91e3ccfc
--- /dev/null
+++ b/src/third_party/unwind/dist/src/s390x/Gis_signal_frame.c
@@ -0,0 +1,77 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+   Copyright (C) 2013 Linaro Limited
+   Copyright (C) 2017 IBM
+
+   Modified for s390x by Michael Munday <mike.munday@ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+/* The restorer stub will be a system call:
+   - rt_sigreturn: svc 173 (0x0aad)
+   - sigreturn:    svc 119 (0x0a77)
+*/
+
+int
+unw_is_signal_frame (unw_cursor_t *cursor)
+{
+#ifdef __linux__
+  struct cursor *c = (struct cursor *) cursor;
+  unw_word_t w0, ip;
+  unw_addr_space_t as;
+  unw_accessors_t *a;
+  void *arg;
+  int ret, shift = 48;
+
+  as = c->dwarf.as;
+  a = unw_get_accessors (as);
+  arg = c->dwarf.as_arg;
+
+  /* Align the instruction pointer to 8 bytes so that we guarantee
+     an 8 byte read from it won't cross a page boundary.
+     Instructions on s390x are 2 byte aligned.  */
+  ip = c->dwarf.ip & ~7;
+  shift -= (c->dwarf.ip - ip) * 8;
+
+  ret = (*a->access_mem) (as, ip, &w0, 0, arg);
+  if (ret < 0)
+    return ret;
+
+  /* extract first 2 bytes of the next instruction */
+  w0 = (w0 >> shift) & 0xffff;
+
+  /* sigreturn */
+  if (w0 == 0x0a77)
+    return 1;
+
+  /* rt_sigreturn */
+  if (w0 == 0x0aad)
+    return 2;
+
+  return 0;
+
+#else
+  return -UNW_ENOINFO;
+#endif
+}
diff --git a/src/third_party/unwind/dist/src/s390x/Greg_states_iterate.c b/src/third_party/unwind/dist/src/s390x/Greg_states_iterate.c
new file mode 100644
index 00000000000..a17dc1b561d
--- /dev/null
+++ b/src/third_party/unwind/dist/src/s390x/Greg_states_iterate.c
@@ -0,0 +1,37 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_reg_states_iterate (unw_cursor_t *cursor,
+			unw_reg_states_callback cb, void *token)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  return dwarf_reg_states_iterate (&c->dwarf, cb, token);
+}
diff --git a/src/third_party/unwind/dist/src/s390x/Gregs.c b/src/third_party/unwind/dist/src/s390x/Gregs.c
new file mode 100644
index 00000000000..1a48833d56e
--- /dev/null
+++ b/src/third_party/unwind/dist/src/s390x/Gregs.c
@@ -0,0 +1,116 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2004 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+   Modified for s390x by Michael Munday <mike.munday@ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+HIDDEN int
+tdep_access_reg (struct cursor *c, unw_regnum_t reg, unw_word_t *valp,
+                 int write)
+{
+  dwarf_loc_t loc = DWARF_NULL_LOC;
+
+  switch (reg)
+    {
+    case UNW_S390X_CFA:
+      if (write)
+        return -UNW_EREADONLYREG;
+      *valp = c->dwarf.cfa;
+      return 0;
+
+    case UNW_S390X_R0:
+    case UNW_S390X_R1:
+    case UNW_S390X_R2:
+    case UNW_S390X_R3:
+    case UNW_S390X_R4:
+    case UNW_S390X_R5:
+    case UNW_S390X_R6:
+    case UNW_S390X_R7:
+    case UNW_S390X_R8:
+    case UNW_S390X_R9:
+    case UNW_S390X_R10:
+    case UNW_S390X_R11:
+    case UNW_S390X_R12:
+    case UNW_S390X_R13:
+    case UNW_S390X_R14:
+    case UNW_S390X_IP:
+      loc = c->dwarf.loc[reg];
+      break;
+
+    case UNW_S390X_R15:
+      if (write)
+        return -UNW_EREADONLYREG;
+      loc = c->dwarf.loc[reg];
+      break;
+
+    default:
+      Debug (1, "bad register number %u\n", reg);
+      return -UNW_EBADREG;
+    }
+
+  if (write)
+    return dwarf_put (&c->dwarf, loc, *valp);
+  else
+    return dwarf_get (&c->dwarf, loc, valp);
+}
+
+HIDDEN int
+tdep_access_fpreg (struct cursor *c, unw_regnum_t reg, unw_fpreg_t *valp,
+                   int write)
+{
+  dwarf_loc_t loc = DWARF_NULL_LOC;
+
+  switch (reg)
+    {
+    case UNW_S390X_F0:
+    case UNW_S390X_F1:
+    case UNW_S390X_F2:
+    case UNW_S390X_F3:
+    case UNW_S390X_F4:
+    case UNW_S390X_F5:
+    case UNW_S390X_F6:
+    case UNW_S390X_F7:
+    case UNW_S390X_F8:
+    case UNW_S390X_F9:
+    case UNW_S390X_F10:
+    case UNW_S390X_F11:
+    case UNW_S390X_F12:
+    case UNW_S390X_F13:
+    case UNW_S390X_F14:
+    case UNW_S390X_F15:
+      loc = c->dwarf.loc[reg];
+      break;
+    default:
+      Debug (1, "bad register number %u\n", reg);
+      return -UNW_EBADREG;
+    }
+
+  if (write)
+    return dwarf_putfp (&c->dwarf, loc, *valp);
+  else
+    return dwarf_getfp (&c->dwarf, loc, valp);
+}
diff --git a/src/third_party/unwind/dist/src/s390x/Gresume.c b/src/third_party/unwind/dist/src/s390x/Gresume.c
new file mode 100644
index 00000000000..fd9d13027e2
--- /dev/null
+++ b/src/third_party/unwind/dist/src/s390x/Gresume.c
@@ -0,0 +1,160 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2004 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <stdlib.h>
+
+#include "unwind_i.h"
+
+#ifndef UNW_REMOTE_ONLY
+
+HIDDEN inline int
+s390x_local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  ucontext_t uc = *c->uc;
+  ucontext_t *rt = NULL;
+  struct sigcontext *sc = NULL;
+  int i;
+  unw_word_t sp, ip;
+  uc.uc_mcontext.psw.addr = c->dwarf.ip;
+
+  /* Ensure c->pi is up-to-date.  On x86-64, it's relatively common to
+     be missing DWARF unwind info.  We don't want to fail in that
+     case, because the frame-chain still would let us do a backtrace
+     at least.  */
+  dwarf_make_proc_info (&c->dwarf);
+
+  switch (c->sigcontext_format)
+    {
+    case S390X_SCF_NONE:
+      Debug (8, "resuming at ip=%llx via setcontext()\n",
+                (unsigned long long) c->dwarf.ip);
+      setcontext (&uc);
+      abort(); /* unreachable */
+    case S390X_SCF_LINUX_SIGFRAME:
+      Debug (8, "resuming at ip=%llx via signal trampoline\n",
+                (unsigned long long) c->dwarf.ip);
+      sc = (struct sigcontext*)c->sigcontext_addr;
+      for (i = UNW_S390X_R0; i <= UNW_S390X_R15; ++i)
+        sc->sregs->regs.gprs[i-UNW_S390X_R0] = uc.uc_mcontext.gregs[i-UNW_S390X_R0];
+      for (i = UNW_S390X_F0; i <= UNW_S390X_F15; ++i)
+        sc->sregs->fpregs.fprs[i-UNW_S390X_F0] = uc.uc_mcontext.fpregs.fprs[i-UNW_S390X_F0].d;
+      sc->sregs->regs.psw.addr = uc.uc_mcontext.psw.addr;
+
+      sp = c->sigcontext_sp;
+      ip = c->sigcontext_pc;
+      __asm__ __volatile__ (
+        "lgr 15, %[sp]\n"
+        "br %[ip]\n"
+        : : [sp] "r" (sp), [ip] "r" (ip)
+      );
+      abort(); /* unreachable */
+    case S390X_SCF_LINUX_RT_SIGFRAME:
+      Debug (8, "resuming at ip=%llx via signal trampoline\n",
+                (unsigned long long) c->dwarf.ip);
+      rt = (ucontext_t*)c->sigcontext_addr;
+      for (i = UNW_S390X_R0; i <= UNW_S390X_R15; ++i)
+        rt->uc_mcontext.gregs[i-UNW_S390X_R0] = uc.uc_mcontext.gregs[i-UNW_S390X_R0];
+      for (i = UNW_S390X_F0; i <= UNW_S390X_F15; ++i)
+        rt->uc_mcontext.fpregs.fprs[i-UNW_S390X_F0] = uc.uc_mcontext.fpregs.fprs[i-UNW_S390X_F0];
+      rt->uc_mcontext.psw.addr = uc.uc_mcontext.psw.addr;
+
+      sp = c->sigcontext_sp;
+      ip = c->sigcontext_pc;
+      __asm__ __volatile__ (
+        "lgr 15, %[sp]\n"
+        "br %[ip]\n"
+        : : [sp] "r" (sp), [ip] "r" (ip)
+      );
+      abort(); /* unreachable */
+    }
+  return -UNW_EINVAL;
+}
+
+#endif /* !UNW_REMOTE_ONLY */
+
+/* This routine is responsible for copying the register values in
+   cursor C and establishing them as the current machine state. */
+
+static inline int
+establish_machine_state (struct cursor *c)
+{
+  int (*access_reg) (unw_addr_space_t, unw_regnum_t, unw_word_t *,
+                     int write, void *);
+  int (*access_fpreg) (unw_addr_space_t, unw_regnum_t, unw_fpreg_t *,
+                       int write, void *);
+  unw_addr_space_t as = c->dwarf.as;
+  void *arg = c->dwarf.as_arg;
+  unw_fpreg_t fpval;
+  unw_word_t val;
+  int reg;
+
+  access_reg = as->acc.access_reg;
+  access_fpreg = as->acc.access_fpreg;
+
+  Debug (8, "copying out cursor state\n");
+
+  for (reg = 0; reg <= UNW_REG_LAST; ++reg)
+    {
+      Debug (16, "copying %s %d\n", unw_regname (reg), reg);
+      if (unw_is_fpreg (reg))
+        {
+          if (tdep_access_fpreg (c, reg, &fpval, 0) >= 0)
+            (*access_fpreg) (as, reg, &fpval, 1, arg);
+        }
+      else
+        {
+          if (tdep_access_reg (c, reg, &val, 0) >= 0)
+            (*access_reg) (as, reg, &val, 1, arg);
+        }
+    }
+
+  if (c->dwarf.args_size)
+    {
+      if (tdep_access_reg (c, UNW_S390X_R15, &val, 0) >= 0)
+        {
+          val += c->dwarf.args_size;
+          (*access_reg) (as, UNW_S390X_R15, &val, 1, arg);
+        }
+    }
+  return 0;
+}
+
+int
+unw_resume (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  int ret;
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  if ((ret = establish_machine_state (c)) < 0)
+    return ret;
+
+  return (*c->dwarf.as->acc.resume) (c->dwarf.as, (unw_cursor_t *) c,
+                                     c->dwarf.as_arg);
+}
diff --git a/src/third_party/unwind/dist/src/s390x/Gstep.c b/src/third_party/unwind/dist/src/s390x/Gstep.c
new file mode 100644
index 00000000000..0b79580b256
--- /dev/null
+++ b/src/third_party/unwind/dist/src/s390x/Gstep.c
@@ -0,0 +1,146 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+   Modified for s390x by Michael Munday <mike.munday@ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include <signal.h>
+
+static int
+s390x_handle_signal_frame (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  int ret, i;
+  unw_word_t sc_addr, sp, *gprs, *fprs, *psw;
+
+  ret = dwarf_get (&c->dwarf, c->dwarf.loc[UNW_S390X_R15], &sp);
+  if (ret < 0)
+    return ret;
+
+  /* Save the SP and PC to be able to return execution at this point
+     later in time (unw_resume).  */
+  c->sigcontext_sp = sp;
+  c->sigcontext_pc = c->dwarf.ip;
+  switch (c->sigcontext_format)
+    {
+    case S390X_SCF_LINUX_SIGFRAME: /* sigreturn */
+      sc_addr = sp + 160;
+      gprs = ((struct sigcontext*)sc_addr)->sregs->regs.gprs;
+      fprs = (unw_word_t*)((struct sigcontext*)sc_addr)->sregs->fpregs.fprs;
+      psw  = &((struct sigcontext*)sc_addr)->sregs->regs.psw.addr;
+      break;
+    case S390X_SCF_LINUX_RT_SIGFRAME: /* rt_sigreturn */
+      sc_addr = sp + sizeof(siginfo_t) + 8 + 160;
+      gprs = ((ucontext_t*)sc_addr)->uc_mcontext.gregs;
+      fprs = (unw_word_t*)((ucontext_t*)sc_addr)->uc_mcontext.fpregs.fprs;
+      psw  = &((ucontext_t*)sc_addr)->uc_mcontext.psw.addr;
+      break;
+    default:
+      return -UNW_EUNSPEC;
+    }
+
+  c->sigcontext_addr = sc_addr;
+
+  /* Update the dwarf cursor.
+     Set the location of the registers to the corresponding addresses of the
+     uc_mcontext / sigcontext structure contents.  */
+  for (i = UNW_S390X_R0; i <= UNW_S390X_R15; ++i)
+    c->dwarf.loc[i] = DWARF_MEM_LOC (c, (unw_word_t) &gprs[i-UNW_S390X_R0]);
+  for (i = UNW_S390X_F0; i <= UNW_S390X_F15; ++i)
+    c->dwarf.loc[i] = DWARF_MEM_LOC (c, (unw_word_t) &fprs[i-UNW_S390X_F0]);
+
+  c->dwarf.loc[UNW_S390X_IP] = DWARF_MEM_LOC (c, (unw_word_t) psw);
+
+  /* Set SP/CFA and PC/IP.
+     Normally the default CFA on s390x is r15+160. We do not add that offset
+     here because dwarf_step will add the offset.  */
+  dwarf_get (&c->dwarf, c->dwarf.loc[UNW_S390X_R15], &c->dwarf.cfa);
+  dwarf_get (&c->dwarf, c->dwarf.loc[UNW_S390X_IP], &c->dwarf.ip);
+
+  c->dwarf.pi_valid = 0;
+  c->dwarf.use_prev_instr = 0;
+
+  return 1;
+}
+
+int
+unw_step (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  int ret = 0, val = c->validate, sig;
+
+#if CONSERVATIVE_CHECKS
+  c->validate = 1;
+#endif
+
+  Debug (1, "(cursor=%p, ip=0x%016lx, cfa=0x%016lx)\n",
+         c, c->dwarf.ip, c->dwarf.cfa);
+
+  /* Try DWARF-based unwinding... */
+  c->sigcontext_format = S390X_SCF_NONE;
+  ret = dwarf_step (&c->dwarf);
+
+#if CONSERVATIVE_CHECKS
+  c->validate = val;
+#endif
+
+  if (unlikely (ret == -UNW_ENOINFO))
+    {
+      /* GCC doesn't currently emit debug information for signal
+         trampolines on s390x so we check for them explicitly.
+
+         If there isn't debug information available we could also
+         try using the backchain (if available).
+
+         Other platforms also detect PLT entries here. That's
+         tricky to do reliably on s390x so I've left it out for
+         now.  */
+
+      /* Memory accesses here are quite likely to be unsafe. */
+      c->validate = 1;
+
+      /* Check if this is a signal frame. */
+      sig = unw_is_signal_frame (cursor);
+      if (sig > 0)
+        {
+          c->sigcontext_format = sig;
+          ret = s390x_handle_signal_frame (cursor);
+        }
+      else
+        {
+          c->dwarf.ip = 0;
+          ret = 0;
+        }
+
+      c->validate = val;
+      return ret;
+    }
+
+  if (unlikely (ret > 0 && c->dwarf.ip == 0))
+    return 0;
+
+  return ret;
+}
diff --git a/src/third_party/unwind/dist/src/s390x/Lapply_reg_state.c b/src/third_party/unwind/dist/src/s390x/Lapply_reg_state.c
new file mode 100644
index 00000000000..7ebada480e5
--- /dev/null
+++ b/src/third_party/unwind/dist/src/s390x/Lapply_reg_state.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gapply_reg_state.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/s390x/Lcreate_addr_space.c b/src/third_party/unwind/dist/src/s390x/Lcreate_addr_space.c
new file mode 100644
index 00000000000..0f2dc6be901
--- /dev/null
+++ b/src/third_party/unwind/dist/src/s390x/Lcreate_addr_space.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gcreate_addr_space.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/s390x/Lget_proc_info.c b/src/third_party/unwind/dist/src/s390x/Lget_proc_info.c
new file mode 100644
index 00000000000..69028b019fc
--- /dev/null
+++ b/src/third_party/unwind/dist/src/s390x/Lget_proc_info.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gget_proc_info.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/s390x/Lget_save_loc.c b/src/third_party/unwind/dist/src/s390x/Lget_save_loc.c
new file mode 100644
index 00000000000..9ea048a9076
--- /dev/null
+++ b/src/third_party/unwind/dist/src/s390x/Lget_save_loc.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gget_save_loc.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/s390x/Lglobal.c b/src/third_party/unwind/dist/src/s390x/Lglobal.c
new file mode 100644
index 00000000000..8c43a67c0ff
--- /dev/null
+++ b/src/third_party/unwind/dist/src/s390x/Lglobal.c
@@ -0,0 +1,6 @@
+#define UNW_LOCAL_ONLY
+#include "config.h"
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gglobal.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/s390x/Linit.c b/src/third_party/unwind/dist/src/s390x/Linit.c
new file mode 100644
index 00000000000..e9abfdd46a3
--- /dev/null
+++ b/src/third_party/unwind/dist/src/s390x/Linit.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/s390x/Linit_local.c b/src/third_party/unwind/dist/src/s390x/Linit_local.c
new file mode 100644
index 00000000000..68a1687e854
--- /dev/null
+++ b/src/third_party/unwind/dist/src/s390x/Linit_local.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit_local.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/s390x/Linit_remote.c b/src/third_party/unwind/dist/src/s390x/Linit_remote.c
new file mode 100644
index 00000000000..58cb04ab7cd
--- /dev/null
+++ b/src/third_party/unwind/dist/src/s390x/Linit_remote.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit_remote.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/s390x/Lis_signal_frame.c b/src/third_party/unwind/dist/src/s390x/Lis_signal_frame.c
new file mode 100644
index 00000000000..b9a7c4f51ad
--- /dev/null
+++ b/src/third_party/unwind/dist/src/s390x/Lis_signal_frame.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gis_signal_frame.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/s390x/Lreg_states_iterate.c b/src/third_party/unwind/dist/src/s390x/Lreg_states_iterate.c
new file mode 100644
index 00000000000..f1eb1e79dcd
--- /dev/null
+++ b/src/third_party/unwind/dist/src/s390x/Lreg_states_iterate.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Greg_states_iterate.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/s390x/Lregs.c b/src/third_party/unwind/dist/src/s390x/Lregs.c
new file mode 100644
index 00000000000..2c9c75cd7d9
--- /dev/null
+++ b/src/third_party/unwind/dist/src/s390x/Lregs.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gregs.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/s390x/Lresume.c b/src/third_party/unwind/dist/src/s390x/Lresume.c
new file mode 100644
index 00000000000..41a8cf003de
--- /dev/null
+++ b/src/third_party/unwind/dist/src/s390x/Lresume.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gresume.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/s390x/Lstep.c b/src/third_party/unwind/dist/src/s390x/Lstep.c
new file mode 100644
index 00000000000..c1ac3c7547f
--- /dev/null
+++ b/src/third_party/unwind/dist/src/s390x/Lstep.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gstep.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/s390x/getcontext.S b/src/third_party/unwind/dist/src/s390x/getcontext.S
new file mode 100644
index 00000000000..d35a3cf3a95
--- /dev/null
+++ b/src/third_party/unwind/dist/src/s390x/getcontext.S
@@ -0,0 +1,74 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 Google, Inc
+	Contributed by Paul Pluzhnikov <ppluzhnikov@google.com>
+   Copyright (C) 2010 Konstantin Belousov <kib@freebsd.org>
+   Copyright (C) 2017 IBM
+
+   Modified for s390x by Michael Munday <mike.munday@ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+// int _Us390x_getcontext (unw_tdep_context_t *ucp)
+
+	.global _Us390x_getcontext
+	.type _Us390x_getcontext, @function
+_Us390x_getcontext:
+	.cfi_startproc
+
+	// Save the minimal set of registers required to restore the
+	// context. Generally speaking this is just the preserved
+	// registers but we've also saved the parameter registers
+	// so that return values can be modified too.
+
+	// save PSW address
+	// (not strictly needed but makes other code simpler)
+	stg   %r14,0x30(%r2)
+
+	// floating point parameters (not strictly needed)
+	std   %f0,0x100(%r2)
+	std   %f2,0x110(%r2)
+	std   %f4,0x120(%r2)
+	std   %f6,0x130(%r2)
+
+	// floating point preserved registers
+	stfpc 0xf8(%r2)
+	std   %f8,0x140(%r2)
+	std   %f9,0x148(%r2)
+	std   %f10,0x150(%r2)
+	std   %f11,0x158(%r2)
+	std   %f12,0x160(%r2)
+	std   %f13,0x168(%r2)
+	std   %f14,0x170(%r2)
+	std   %f15,0x178(%r2)
+
+	// preserved registers and parameters
+	lgr   %r1,%r2
+	lghi  %r2,0
+	stmg  %r2,%r15,0x48(%r1)
+
+	br    %r14
+
+	.cfi_endproc
+	.size _Us390x_getcontext, . - _Us390x_getcontext
+
+	// We do not need executable stack.
+	.section        .note.GNU-stack,"",@progbits
diff --git a/src/third_party/unwind/dist/src/s390x/init.h b/src/third_party/unwind/dist/src/s390x/init.h
new file mode 100644
index 00000000000..86ced38f66c
--- /dev/null
+++ b/src/third_party/unwind/dist/src/s390x/init.h
@@ -0,0 +1,71 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+   Modified for s390x by Michael Munday <mike.munday@ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+static inline int
+common_init (struct cursor *c, unsigned use_prev_instr)
+{
+  int ret;
+  int i;
+
+  for (i = UNW_S390X_R0; i <= UNW_S390X_R15; ++i) {
+    c->dwarf.loc[i] = DWARF_REG_LOC(&c->dwarf, i);
+  }
+  for (i = UNW_S390X_F0; i <= UNW_S390X_F15; ++i) {
+    c->dwarf.loc[i] = DWARF_FPREG_LOC(&c->dwarf, i);
+  }
+  /* IP isn't a real register, it is encoded in the PSW */
+  c->dwarf.loc[UNW_S390X_IP] = DWARF_REG_LOC(&c->dwarf, UNW_S390X_IP);
+
+  ret = dwarf_get (&c->dwarf, c->dwarf.loc[UNW_S390X_IP], &c->dwarf.ip);
+  if (ret < 0)
+    return ret;
+
+  /* Normally the CFA offset on s390x is biased, however this is taken
+     into account by the CFA offset in dwarf_step, so here we just mark
+     make it equal to the stack pointer.  */
+  ret = dwarf_get (&c->dwarf, DWARF_REG_LOC (&c->dwarf, UNW_S390X_R15),
+                   &c->dwarf.cfa);
+  if (ret < 0)
+    return ret;
+
+  c->sigcontext_format = S390X_SCF_NONE;
+  c->sigcontext_addr = 0;
+
+  c->dwarf.args_size = 0;
+  c->dwarf.stash_frames = 0;
+  c->dwarf.use_prev_instr = use_prev_instr;
+  c->dwarf.pi_valid = 0;
+  c->dwarf.pi_is_dynamic = 0;
+  c->dwarf.hint = 0;
+  c->dwarf.prev_rs = 0;
+  c->dwarf.eh_valid_mask = 0;
+
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/s390x/is_fpreg.c b/src/third_party/unwind/dist/src/s390x/is_fpreg.c
new file mode 100644
index 00000000000..bc31f3e9170
--- /dev/null
+++ b/src/third_party/unwind/dist/src/s390x/is_fpreg.c
@@ -0,0 +1,36 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2004-2005 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+   Modified for s390x by Michael Munday <mike.munday@ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "libunwind_i.h"
+
+int
+unw_is_fpreg (int regnum)
+{
+  /* vector registers? */
+  return regnum >= UNW_S390X_F0 && regnum <= UNW_S390X_F15;
+}
diff --git a/src/third_party/unwind/dist/src/s390x/regname.c b/src/third_party/unwind/dist/src/s390x/regname.c
new file mode 100644
index 00000000000..2421b37ebb0
--- /dev/null
+++ b/src/third_party/unwind/dist/src/s390x/regname.c
@@ -0,0 +1,57 @@
+/* libunwind - a platform-independent unwind library
+
+        Contributed by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+static const char *regname[] =
+  {
+    [UNW_S390X_R0]="R0",
+    [UNW_S390X_R1]="R1",
+    [UNW_S390X_R2]="R2",
+    [UNW_S390X_R3]="R3",
+    [UNW_S390X_R4]="R4",
+    [UNW_S390X_R5]="R5",
+    [UNW_S390X_R6]="R6",
+    [UNW_S390X_R7]="R7",
+    [UNW_S390X_R8]="R8",
+    [UNW_S390X_R9]="R9",
+    [UNW_S390X_R10]="R10",
+    [UNW_S390X_R11]="R11",
+    [UNW_S390X_R12]="R12",
+    [UNW_S390X_R13]="R13",
+    [UNW_S390X_R14]="R14",
+    [UNW_S390X_R15]="R15",
+
+    [UNW_S390X_IP]="IP"
+   };
+
+const char *
+unw_regname (unw_regnum_t reg)
+{
+  if (reg < (unw_regnum_t) ARRAY_SIZE (regname))
+    return regname[reg];
+  else
+    return "???";
+}
diff --git a/src/third_party/unwind/dist/src/s390x/setcontext.S b/src/third_party/unwind/dist/src/s390x/setcontext.S
new file mode 100644
index 00000000000..6cf55688aa4
--- /dev/null
+++ b/src/third_party/unwind/dist/src/s390x/setcontext.S
@@ -0,0 +1,76 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 Google, Inc
+	Contributed by Paul Pluzhnikov <ppluzhnikov@google.com>
+   Copyright (C) 2010 Konstantin Belousov <kib@freebsd.org>
+   Copyright (C) 2017 IBM
+
+   Modified for s390x by Michael Munday <mike.munday@ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+// int _Us390x_setcontext (const ucontext_t *ucp)
+
+	.global _Us390x_setcontext
+	.type _Us390x_setcontext, @function
+_Us390x_setcontext:
+	.cfi_startproc
+
+	// Must only restore registers saved by getcontext, other fields
+	// in the ucontext_t might be uninitialised.
+
+	// Stop this function being unwound. We are clobbering callee-save
+	// registers in this function so unwinding it is unsafe.
+	// Ideally we'd save callee-save registers, update the CFI for them
+	// and then switch to the new CFI once the context switch is
+	// complete.
+	.cfi_undefined %r14
+
+	// floating point parameters
+	ld    %f0,0x100(%r2)
+	ld    %f2,0x110(%r2)
+	ld    %f4,0x120(%r2)
+	ld    %f6,0x130(%r2)
+
+	// floating point preserved registers
+	lfpc  0xf8(%r2)
+	ld    %f8,0x140(%r2)
+	ld    %f9,0x148(%r2)
+	ld    %f10,0x150(%r2)
+	ld    %f11,0x158(%r2)
+	ld    %f12,0x160(%r2)
+	ld    %f13,0x168(%r2)
+	ld    %f14,0x170(%r2)
+	ld    %f15,0x178(%r2)
+
+	// preserved registers and parameters
+	lgr   %r1,%r2
+	lmg   %r2,%r15,0x48(%r1)
+
+	// restore PSW address
+	lg    %r1,0x30(%r1)
+	br    %r1
+
+	.cfi_endproc
+	.size _Us390x_setcontext, . - _Us390x_setcontext
+
+	// We do not need executable stack.
+	.section        .note.GNU-stack,"",@progbits
diff --git a/src/third_party/unwind/dist/src/s390x/unwind_i.h b/src/third_party/unwind/dist/src/s390x/unwind_i.h
new file mode 100644
index 00000000000..6e4b99baaa8
--- /dev/null
+++ b/src/third_party/unwind/dist/src/s390x/unwind_i.h
@@ -0,0 +1,48 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002, 2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+   Modified for s390x by Michael Munday <mike.munday@ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef unwind_i_h
+#define unwind_i_h
+
+#include <stdint.h>
+
+#include <libunwind-s390x.h>
+
+#include "libunwind_i.h"
+#include <sys/ucontext.h>
+
+#define s390x_lock                     UNW_OBJ(lock)
+#define s390x_local_resume             UNW_OBJ(local_resume)
+#define s390x_local_addr_space_init    UNW_OBJ(local_addr_space_init)
+#define setcontext                     UNW_ARCH_OBJ(setcontext)
+
+extern void s390x_local_addr_space_init (void);
+extern int s390x_local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg);
+extern int setcontext (const ucontext_t *ucp);
+
+#endif /* unwind_i_h */
diff --git a/src/third_party/unwind/dist/src/setjmp/libunwind-setjmp.pc.in b/src/third_party/unwind/dist/src/setjmp/libunwind-setjmp.pc.in
new file mode 100644
index 00000000000..7b71126535b
--- /dev/null
+++ b/src/third_party/unwind/dist/src/setjmp/libunwind-setjmp.pc.in
@@ -0,0 +1,11 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: libunwind-setjmp
+Description: libunwind setjmp library
+Version: @VERSION@
+Requires: libunwind
+Libs: -L${libdir} -lunwind-setjmp
+Cflags: -I${includedir}
diff --git a/src/third_party/unwind/dist/src/setjmp/longjmp.c b/src/third_party/unwind/dist/src/setjmp/longjmp.c
new file mode 100644
index 00000000000..8295a9b8ed4
--- /dev/null
+++ b/src/third_party/unwind/dist/src/setjmp/longjmp.c
@@ -0,0 +1,115 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#define UNW_LOCAL_ONLY
+
+#undef _FORTIFY_SOURCE
+#include <assert.h>
+#include <libunwind.h>
+#include <setjmp.h>
+#include <signal.h>
+#include <stdlib.h>
+
+#include "jmpbuf.h"
+#include "setjmp_i.h"
+
+#if defined(__GLIBC__)
+#if __GLIBC_PREREQ(2, 4)
+
+/* Starting with glibc-2.4, {sig,}setjmp in GLIBC obfuscates the
+   register values in jmp_buf by XORing them with a "random"
+   canary value.
+
+   This makes it impossible to implement longjmp, as we
+   can never match wp[JB_SP], unless we decode the canary first.
+
+   Doing so is possible, but doesn't appear to be worth the trouble,
+   so we simply defer to glibc longjmp here.  */
+#define _longjmp __nonworking__longjmp
+#define longjmp __nonworking_longjmp
+static void _longjmp (jmp_buf env, int val);
+static void longjmp (jmp_buf env, int val);
+#endif
+#endif /* __GLIBC__ */
+
+void
+_longjmp (jmp_buf env, int val)
+{
+  extern int _UI_longjmp_cont;
+  unw_context_t uc;
+  unw_cursor_t c;
+  unw_word_t sp;
+  unw_word_t *wp = (unw_word_t *) env;
+
+  if (unw_getcontext (&uc) < 0 || unw_init_local (&c, &uc) < 0)
+    abort ();
+
+  do
+    {
+      if (unw_get_reg (&c, UNW_REG_SP, &sp) < 0)
+        abort ();
+#ifdef __FreeBSD__
+      if (sp != wp[JB_SP] + sizeof(unw_word_t))
+#else
+      if (sp != wp[JB_SP])
+#endif
+        continue;
+
+      if (!bsp_match (&c, wp))
+        continue;
+
+      /* found the right frame: */
+
+      assert (UNW_NUM_EH_REGS >= 2);
+
+      if (unw_set_reg (&c, UNW_REG_EH + 0, wp[JB_RP]) < 0
+          || unw_set_reg (&c, UNW_REG_EH + 1, val) < 0
+          || unw_set_reg (&c, UNW_REG_IP,
+                          (unw_word_t) (uintptr_t) &_UI_longjmp_cont))
+        abort ();
+
+      unw_resume (&c);
+
+      abort ();
+    }
+  while (unw_step (&c) > 0);
+
+  abort ();
+}
+
+#ifdef __GNUC__
+#define STRINGIFY1(x) #x
+#define STRINGIFY(x) STRINGIFY1(x)
+void longjmp (jmp_buf env, int val) 
+  __attribute__ ((alias (STRINGIFY(_longjmp))));
+#else
+
+void
+longjmp (jmp_buf env, int val)
+{
+  _longjmp (env, val);
+}
+
+#endif /* __GNUC__ */
diff --git a/src/third_party/unwind/dist/src/setjmp/setjmp_i.h b/src/third_party/unwind/dist/src/setjmp/setjmp_i.h
new file mode 100644
index 00000000000..4d9139693ec
--- /dev/null
+++ b/src/third_party/unwind/dist/src/setjmp/setjmp_i.h
@@ -0,0 +1,118 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#if UNW_TARGET_IA64
+
+#include "libunwind_i.h"
+#include "tdep-ia64/rse.h"
+
+static inline int
+bsp_match (unw_cursor_t *c, unw_word_t *wp)
+{
+  unw_word_t bsp, pfs, sol;
+
+  if (unw_get_reg (c, UNW_IA64_BSP, &bsp) < 0
+      || unw_get_reg (c, UNW_IA64_AR_PFS, &pfs) < 0)
+    abort ();
+
+  /* simulate the effect of "br.call sigsetjmp" on ar.bsp: */
+  sol = (pfs >> 7) & 0x7f;
+  bsp = rse_skip_regs (bsp, sol);
+
+  if (bsp != wp[JB_BSP])
+    return 0;
+
+  if (unlikely (sol == 0))
+    {
+      unw_word_t sp, prev_sp;
+      unw_cursor_t tmp = *c;
+
+      /* The caller of {sig,}setjmp() cannot have a NULL-frame.  If we
+         see a NULL-frame, we haven't reached the right target yet.
+         To have a NULL-frame, the number of locals must be zero and
+         the stack-frame must also be empty.  */
+
+      if (unw_step (&tmp) < 0)
+        abort ();
+
+      if (unw_get_reg (&tmp, UNW_REG_SP, &sp) < 0
+          || unw_get_reg (&tmp, UNW_REG_SP, &prev_sp) < 0)
+        abort ();
+
+      if (sp == prev_sp)
+        /* got a NULL-frame; keep looking... */
+        return 0;
+    }
+  return 1;
+}
+
+/* On ia64 we cannot always call sigprocmask() at
+   _UI_siglongjmp_cont() because the signal may have switched stacks
+   and the old stack's register-backing store may have overflown,
+   leaving us no space to allocate the stacked registers needed to
+   call sigprocmask().  Fortunately, we can just let unw_resume() (via
+   sigreturn) take care of restoring the signal-mask.  That's faster
+   anyhow.  */
+static inline int
+resume_restores_sigmask (unw_cursor_t *c, unw_word_t *wp)
+{
+  unw_word_t sc_addr = ((struct cursor *) c)->sigcontext_addr;
+  struct sigcontext *sc = (struct sigcontext *) sc_addr;
+  sigset_t current_mask;
+  void *mp;
+
+  if (!sc_addr)
+    return 0;
+
+  /* let unw_resume() install the desired signal mask */
+
+  if (wp[JB_MASK_SAVED])
+    mp = &wp[JB_MASK];
+  else
+    {
+      if (sigprocmask (SIG_BLOCK, NULL, &current_mask) < 0)
+        abort ();
+      mp = &current_mask;
+    }
+  memcpy (&sc->sc_mask, mp, sizeof (sc->sc_mask));
+  return 1;
+}
+
+#else /* !UNW_TARGET_IA64 */
+
+static inline int
+bsp_match (unw_cursor_t *c, unw_word_t *wp)
+{
+  return 1;
+}
+
+static inline int
+resume_restores_sigmask (unw_cursor_t *c, unw_word_t *wp)
+{
+  /* We may want to do this analogously as for ia64... */
+  return 0;
+}
+
+#endif /* !UNW_TARGET_IA64 */
diff --git a/src/third_party/unwind/dist/src/setjmp/siglongjmp.c b/src/third_party/unwind/dist/src/setjmp/siglongjmp.c
new file mode 100644
index 00000000000..0e286f6f085
--- /dev/null
+++ b/src/third_party/unwind/dist/src/setjmp/siglongjmp.c
@@ -0,0 +1,127 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#define UNW_LOCAL_ONLY
+
+#include <setjmp.h>
+
+#include "libunwind_i.h"
+#include "jmpbuf.h"
+#include "setjmp_i.h"
+
+#if !defined(_NSIG) && defined(_SIG_MAXSIG)
+# define _NSIG (_SIG_MAXSIG - 1)
+#endif
+
+#if defined(__GLIBC__)
+#if __GLIBC_PREREQ(2, 4)
+
+/* Starting with glibc-2.4, {sig,}setjmp in GLIBC obfuscates the
+   register values in jmp_buf by XORing them with a "random"
+   canary value.
+
+   This makes it impossible to implement longjmp, as we
+   can never match wp[JB_SP], unless we decode the canary first.
+
+   Doing so is possible, but doesn't appear to be worth the trouble,
+   so we simply defer to glibc siglongjmp here.  */
+
+#define siglongjmp __nonworking_siglongjmp
+static void siglongjmp (sigjmp_buf env, int val) UNUSED;
+#endif
+#endif /* __GLIBC_PREREQ */
+
+void
+siglongjmp (sigjmp_buf env, int val)
+{
+  unw_word_t *wp = (unw_word_t *) env;
+  extern int _UI_siglongjmp_cont;
+  extern int _UI_longjmp_cont;
+  unw_context_t uc;
+  unw_cursor_t c;
+  unw_word_t sp;
+  int *cont;
+
+  if (unw_getcontext (&uc) < 0 || unw_init_local (&c, &uc) < 0)
+    abort ();
+
+  do
+    {
+      if (unw_get_reg (&c, UNW_REG_SP, &sp) < 0)
+        abort ();
+#ifdef __FreeBSD__
+      if (sp != wp[JB_SP] + sizeof(unw_word_t))
+#else
+      if (sp != wp[JB_SP])
+#endif
+        continue;
+
+      if (!bsp_match (&c, wp))
+        continue;
+
+      /* found the right frame: */
+
+      /* default to resuming without restoring signal-mask */
+      cont = &_UI_longjmp_cont;
+
+      /* Order of evaluation is important here: if unw_resume()
+         restores signal mask, we must set it up appropriately, even
+         if wp[JB_MASK_SAVED] is FALSE.  */
+      if (!resume_restores_sigmask (&c, wp) && wp[JB_MASK_SAVED])
+        {
+          /* sigmask was saved */
+#if defined(__linux__)
+          if (UNW_NUM_EH_REGS < 4 || _NSIG > 16 * sizeof (unw_word_t))
+            /* signal mask doesn't fit into EH arguments and we can't
+               put it on the stack without overwriting something
+               else... */
+            abort ();
+          else
+            if (unw_set_reg (&c, UNW_REG_EH + 2, wp[JB_MASK]) < 0
+                || (_NSIG > 8 * sizeof (unw_word_t)
+                    && unw_set_reg (&c, UNW_REG_EH + 3, wp[JB_MASK + 1]) < 0))
+              abort ();
+#elif defined(__FreeBSD__)
+          if (unw_set_reg (&c, UNW_REG_EH + 2, &wp[JB_MASK]) < 0)
+              abort();
+#else
+#error Port me
+#endif
+          cont = &_UI_siglongjmp_cont;
+        }
+
+      if (unw_set_reg (&c, UNW_REG_EH + 0, wp[JB_RP]) < 0
+          || unw_set_reg (&c, UNW_REG_EH + 1, val) < 0
+          || unw_set_reg (&c, UNW_REG_IP, (unw_word_t) (uintptr_t) cont))
+        abort ();
+
+      unw_resume (&c);
+
+      abort ();
+    }
+  while (unw_step (&c) > 0);
+
+  abort ();
+}
diff --git a/src/third_party/unwind/dist/src/sh/Gapply_reg_state.c b/src/third_party/unwind/dist/src/sh/Gapply_reg_state.c
new file mode 100644
index 00000000000..82f056da67e
--- /dev/null
+++ b/src/third_party/unwind/dist/src/sh/Gapply_reg_state.c
@@ -0,0 +1,37 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_apply_reg_state (unw_cursor_t *cursor,
+		     void *reg_states_data)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  return dwarf_apply_reg_state (&c->dwarf, (dwarf_reg_state_t *)reg_states_data);
+}
diff --git a/src/third_party/unwind/dist/src/sh/Gcreate_addr_space.c b/src/third_party/unwind/dist/src/sh/Gcreate_addr_space.c
new file mode 100644
index 00000000000..6ca3a384da0
--- /dev/null
+++ b/src/third_party/unwind/dist/src/sh/Gcreate_addr_space.c
@@ -0,0 +1,59 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <string.h>
+#include <stdlib.h>
+
+#include "unwind_i.h"
+
+unw_addr_space_t
+unw_create_addr_space (unw_accessors_t *a, int byte_order)
+{
+#ifdef UNW_LOCAL_ONLY
+  return NULL;
+#else
+  unw_addr_space_t as;
+
+  /* SH supports little-endian and big-endian. */
+  if (byte_order != 0 && byte_order != __LITTLE_ENDIAN
+      && byte_order != __BIG_ENDIAN)
+    return NULL;
+
+  as = malloc (sizeof (*as));
+  if (!as)
+    return NULL;
+
+  memset (as, 0, sizeof (*as));
+
+  as->acc = *a;
+
+  /* Default to little-endian for SH. */
+  if (byte_order == 0 || byte_order == __LITTLE_ENDIAN)
+    as->big_endian = 0;
+  else
+    as->big_endian = 1;
+
+  return as;
+#endif
+}
diff --git a/src/third_party/unwind/dist/src/sh/Gget_proc_info.c b/src/third_party/unwind/dist/src/sh/Gget_proc_info.c
new file mode 100644
index 00000000000..c363d2405d7
--- /dev/null
+++ b/src/third_party/unwind/dist/src/sh/Gget_proc_info.c
@@ -0,0 +1,39 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_get_proc_info (unw_cursor_t *cursor, unw_proc_info_t *pi)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  int ret;
+
+  ret = dwarf_make_proc_info (&c->dwarf);
+  if (ret < 0)
+    return ret;
+
+  *pi = c->dwarf.pi;
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/sh/Gget_save_loc.c b/src/third_party/unwind/dist/src/sh/Gget_save_loc.c
new file mode 100644
index 00000000000..24d9f63bc32
--- /dev/null
+++ b/src/third_party/unwind/dist/src/sh/Gget_save_loc.c
@@ -0,0 +1,83 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_get_save_loc (unw_cursor_t *cursor, int reg, unw_save_loc_t *sloc)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  dwarf_loc_t loc;
+
+  switch (reg)
+    {
+    case UNW_SH_R0:
+    case UNW_SH_R1:
+    case UNW_SH_R2:
+    case UNW_SH_R3:
+    case UNW_SH_R4:
+    case UNW_SH_R5:
+    case UNW_SH_R6:
+    case UNW_SH_R7:
+    case UNW_SH_R8:
+    case UNW_SH_R9:
+    case UNW_SH_R10:
+    case UNW_SH_R11:
+    case UNW_SH_R12:
+    case UNW_SH_R13:
+    case UNW_SH_R14:
+    case UNW_SH_R15:
+    case UNW_SH_PC:
+    case UNW_SH_PR:
+      loc = c->dwarf.loc[reg];
+      break;
+
+    default:
+      loc = DWARF_NULL_LOC;     /* default to "not saved" */
+      break;
+    }
+
+  memset (sloc, 0, sizeof (*sloc));
+
+  if (DWARF_IS_NULL_LOC (loc))
+    {
+      sloc->type = UNW_SLT_NONE;
+      return 0;
+    }
+
+#if !defined(UNW_LOCAL_ONLY)
+  if (DWARF_IS_REG_LOC (loc))
+    {
+      sloc->type = UNW_SLT_REG;
+      sloc->u.regnum = DWARF_GET_LOC (loc);
+    }
+  else
+#endif
+    {
+      sloc->type = UNW_SLT_MEMORY;
+      sloc->u.addr = DWARF_GET_LOC (loc);
+    }
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/sh/Gglobal.c b/src/third_party/unwind/dist/src/sh/Gglobal.c
new file mode 100644
index 00000000000..ed273339768
--- /dev/null
+++ b/src/third_party/unwind/dist/src/sh/Gglobal.c
@@ -0,0 +1,56 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "dwarf_i.h"
+
+HIDDEN define_lock (sh_lock);
+HIDDEN int tdep_init_done;
+
+HIDDEN void
+tdep_init (void)
+{
+  intrmask_t saved_mask;
+
+  sigfillset (&unwi_full_mask);
+
+  lock_acquire (&sh_lock, saved_mask);
+  {
+    if (tdep_init_done)
+      /* another thread else beat us to it... */
+      goto out;
+
+    mi_init ();
+
+    dwarf_init ();
+
+#ifndef UNW_REMOTE_ONLY
+    sh_local_addr_space_init ();
+#endif
+    tdep_init_done = 1; /* signal that we're initialized... */
+  }
+ out:
+  lock_release (&sh_lock, saved_mask);
+}
diff --git a/src/third_party/unwind/dist/src/sh/Ginit.c b/src/third_party/unwind/dist/src/sh/Ginit.c
new file mode 100644
index 00000000000..52988a721e9
--- /dev/null
+++ b/src/third_party/unwind/dist/src/sh/Ginit.c
@@ -0,0 +1,186 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "unwind_i.h"
+
+#ifdef UNW_REMOTE_ONLY
+
+/* unw_local_addr_space is a NULL pointer in this case.  */
+unw_addr_space_t unw_local_addr_space;
+
+#else /* !UNW_REMOTE_ONLY */
+
+static struct unw_addr_space local_addr_space;
+
+unw_addr_space_t unw_local_addr_space = &local_addr_space;
+
+static inline void *
+uc_addr (ucontext_t *uc, int reg)
+{
+  if (reg >= UNW_SH_R0 && reg <= UNW_SH_PR)
+    return &uc->uc_mcontext.gregs[reg];
+  else
+    return NULL;
+}
+
+# ifdef UNW_LOCAL_ONLY
+
+HIDDEN void *
+tdep_uc_addr (ucontext_t *uc, int reg)
+{
+  return uc_addr (uc, reg);
+}
+
+# endif /* UNW_LOCAL_ONLY */
+
+HIDDEN unw_dyn_info_list_t _U_dyn_info_list;
+
+/* XXX fix me: there is currently no way to locate the dyn-info list
+       by a remote unwinder.  On ia64, this is done via a special
+       unwind-table entry.  Perhaps something similar can be done with
+       DWARF2 unwind info.  */
+
+static void
+put_unwind_info (unw_addr_space_t as, unw_proc_info_t *proc_info, void *arg)
+{
+  /* it's a no-op */
+}
+
+static int
+get_dyn_info_list_addr (unw_addr_space_t as, unw_word_t *dyn_info_list_addr,
+                        void *arg)
+{
+  *dyn_info_list_addr = (unw_word_t) &_U_dyn_info_list;
+  return 0;
+}
+
+static int
+access_mem (unw_addr_space_t as, unw_word_t addr, unw_word_t *val, int write,
+            void *arg)
+{
+  if (write)
+    {
+      Debug (16, "mem[%x] <- %x\n", addr, *val);
+      *(unw_word_t *) addr = *val;
+    }
+  else
+    {
+      *val = *(unw_word_t *) addr;
+      Debug (16, "mem[%x] -> %x\n", addr, *val);
+    }
+  return 0;
+}
+
+static int
+access_reg (unw_addr_space_t as, unw_regnum_t reg, unw_word_t *val, int write,
+            void *arg)
+{
+  unw_word_t *addr;
+  ucontext_t *uc = arg;
+
+  if (unw_is_fpreg (reg))
+    goto badreg;
+
+  if (!(addr = uc_addr (uc, reg)))
+    goto badreg;
+
+  if (write)
+    {
+      *(unw_word_t *) addr = *val;
+      Debug (12, "%s <- %x\n", unw_regname (reg), *val);
+    }
+  else
+    {
+      *val = *(unw_word_t *) addr;
+      Debug (12, "%s -> %x\n", unw_regname (reg), *val);
+    }
+  return 0;
+
+ badreg:
+  Debug (1, "bad register number %u\n", reg);
+  return -UNW_EBADREG;
+}
+
+static int
+access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val,
+              int write, void *arg)
+{
+  ucontext_t *uc = arg;
+  unw_fpreg_t *addr;
+
+  if (!unw_is_fpreg (reg))
+    goto badreg;
+
+  if (!(addr = uc_addr (uc, reg)))
+    goto badreg;
+
+  if (write)
+    {
+      Debug (12, "%s <- %08lx.%08lx.%08lx\n", unw_regname (reg),
+             ((long *)val)[0], ((long *)val)[1], ((long *)val)[2]);
+      *(unw_fpreg_t *) addr = *val;
+    }
+  else
+    {
+      *val = *(unw_fpreg_t *) addr;
+      Debug (12, "%s -> %08lx.%08lx.%08lx\n", unw_regname (reg),
+             ((long *)val)[0], ((long *)val)[1], ((long *)val)[2]);
+    }
+  return 0;
+
+ badreg:
+  Debug (1, "bad register number %u\n", reg);
+  /* attempt to access a non-preserved register */
+  return -UNW_EBADREG;
+}
+
+static int
+get_static_proc_name (unw_addr_space_t as, unw_word_t ip,
+                      char *buf, size_t buf_len, unw_word_t *offp,
+                      void *arg)
+{
+  return _Uelf32_get_proc_name (as, getpid (), ip, buf, buf_len, offp);
+}
+
+HIDDEN void
+sh_local_addr_space_init (void)
+{
+  memset (&local_addr_space, 0, sizeof (local_addr_space));
+  local_addr_space.caching_policy = UNWI_DEFAULT_CACHING_POLICY;
+  local_addr_space.acc.find_proc_info = dwarf_find_proc_info;
+  local_addr_space.acc.put_unwind_info = put_unwind_info;
+  local_addr_space.acc.get_dyn_info_list_addr = get_dyn_info_list_addr;
+  local_addr_space.acc.access_mem = access_mem;
+  local_addr_space.acc.access_reg = access_reg;
+  local_addr_space.acc.access_fpreg = access_fpreg;
+  local_addr_space.acc.resume = sh_local_resume;
+  local_addr_space.acc.get_proc_name = get_static_proc_name;
+  unw_flush_cache (&local_addr_space, 0, 0);
+}
+
+#endif /* !UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/dist/src/sh/Ginit_local.c b/src/third_party/unwind/dist/src/sh/Ginit_local.c
new file mode 100644
index 00000000000..99ddb36fb3e
--- /dev/null
+++ b/src/third_party/unwind/dist/src/sh/Ginit_local.c
@@ -0,0 +1,78 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright 2011 Linaro Limited
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "init.h"
+
+#ifdef UNW_REMOTE_ONLY
+
+int
+unw_init_local (unw_cursor_t *cursor, unw_context_t *uc)
+{
+  return -UNW_EINVAL;
+}
+
+#else /* !UNW_REMOTE_ONLY */
+
+static int
+unw_init_local (unw_cursor_t *cursor, unw_context_t *uc, unsigned use_prev_instr)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  if (!tdep_init_done)
+    tdep_init ();
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  c->dwarf.as = unw_local_addr_space;
+  c->dwarf.as_arg = uc;
+
+  return common_init (c, use_prev_instr);
+}
+
+int
+unw_init_local (unw_cursor_t *cursor, unw_context_t *uc)
+{
+  return unw_init_local_common(cursor, uc, 1);
+}
+
+int
+unw_init_local2 (unw_cursor_t *cursor, ucontext_t *uc, int flag)
+{
+  if (!flag)
+    {
+      return unw_init_local_common(cursor, uc, 1);
+    }
+  else if (flag == UNW_INIT_SIGNAL_FRAME)
+    {
+      return unw_init_local_common(cursor, uc, 0);
+    }
+  else
+    {
+      return -UNW_EINVAL;
+    }
+}
+
+#endif /* !UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/dist/src/sh/Ginit_remote.c b/src/third_party/unwind/dist/src/sh/Ginit_remote.c
new file mode 100644
index 00000000000..9b8ba5b89de
--- /dev/null
+++ b/src/third_party/unwind/dist/src/sh/Ginit_remote.c
@@ -0,0 +1,45 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "init.h"
+#include "unwind_i.h"
+
+int
+unw_init_remote (unw_cursor_t *cursor, unw_addr_space_t as, void *as_arg)
+{
+#ifdef UNW_LOCAL_ONLY
+  return -UNW_EINVAL;
+#else /* !UNW_LOCAL_ONLY */
+  struct cursor *c = (struct cursor *) cursor;
+
+  if (!tdep_init_done)
+    tdep_init ();
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  c->dwarf.as = as;
+  c->dwarf.as_arg = as_arg;
+  return common_init (c, 0);
+#endif /* !UNW_LOCAL_ONLY */
+}
diff --git a/src/third_party/unwind/dist/src/sh/Gis_signal_frame.c b/src/third_party/unwind/dist/src/sh/Gis_signal_frame.c
new file mode 100644
index 00000000000..4481fe1a498
--- /dev/null
+++ b/src/third_party/unwind/dist/src/sh/Gis_signal_frame.c
@@ -0,0 +1,119 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+/* Disassembly of the Linux VDSO sigreturn functions:
+
+00000000 <__kernel_sigreturn>:
+   0:   05 93           mov.w   e <__kernel_sigreturn+0xe>,r3   ! 77
+   2:   10 c3           trapa   #16
+   4:   0b 20           or      r0,r0
+   6:   0b 20           or      r0,r0
+   8:   0b 20           or      r0,r0
+   a:   0b 20           or      r0,r0
+   c:   0b 20           or      r0,r0
+   e:   77 00           .word 0x0077
+  10:   09 00           nop
+  12:   09 00           nop
+  14:   09 00           nop
+  16:   09 00           nop
+  18:   09 00           nop
+  1a:   09 00           nop
+  1c:   09 00           nop
+  1e:   09 00           nop
+
+00000020 <__kernel_rt_sigreturn>:
+  20:   05 93           mov.w   2e <__kernel_rt_sigreturn+0xe>,r3       ! ad
+  22:   10 c3           trapa   #16
+  24:   0b 20           or      r0,r0
+  26:   0b 20           or      r0,r0
+  28:   0b 20           or      r0,r0
+  2a:   0b 20           or      r0,r0
+  2c:   0b 20           or      r0,r0
+  2e:   ad 00           mov.w   @(r0,r10),r0
+  30:   09 00           nop
+  32:   09 00           nop
+  34:   09 00           nop
+  36:   09 00           nop
+  38:   09 00           nop
+  3a:   09 00           nop
+  3c:   09 00           nop
+  3e:   09 00           nop
+*/
+
+int
+unw_is_signal_frame (unw_cursor_t *cursor)
+{
+#ifdef __linux__
+  struct cursor *c = (struct cursor *) cursor;
+  unw_word_t w0, ip;
+  unw_addr_space_t as;
+  unw_accessors_t *a;
+  void *arg;
+  int ret;
+
+  as = c->dwarf.as;
+  a = unw_get_accessors_int (as);
+  arg = c->dwarf.as_arg;
+
+  ip = c->dwarf.ip;
+
+  ret = (*a->access_mem) (as, ip, &w0, 0, arg);
+  if (ret < 0)
+    return ret;
+
+  if (w0 != 0xc3109305)
+    return 0;
+
+  ret = (*a->access_mem) (as, ip+4, &w0, 0, arg);
+  if (ret < 0)
+    return ret;
+
+  if (w0 != 0x200b200b)
+    return 0;
+
+  ret = (*a->access_mem) (as, ip+8, &w0, 0, arg);
+  if (ret < 0)
+    return ret;
+
+  if (w0 != 0x200b200b)
+    return 0;
+
+  ret = (*a->access_mem) (as, ip+12, &w0, 0, arg);
+  if (ret < 0)
+    return ret;
+
+  if (w0 == 0x0077200b)
+    return 1; /* non-RT */
+  else if (w0 == 0x00ad200b)
+    return 2; /* RT */
+
+  /* does not look like a signal frame */
+  return 0;
+
+#else
+  return -UNW_ENOINFO;
+#endif
+}
diff --git a/src/third_party/unwind/dist/src/sh/Greg_states_iterate.c b/src/third_party/unwind/dist/src/sh/Greg_states_iterate.c
new file mode 100644
index 00000000000..a17dc1b561d
--- /dev/null
+++ b/src/third_party/unwind/dist/src/sh/Greg_states_iterate.c
@@ -0,0 +1,37 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_reg_states_iterate (unw_cursor_t *cursor,
+			unw_reg_states_callback cb, void *token)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  return dwarf_reg_states_iterate (&c->dwarf, cb, token);
+}
diff --git a/src/third_party/unwind/dist/src/sh/Gregs.c b/src/third_party/unwind/dist/src/sh/Gregs.c
new file mode 100644
index 00000000000..7d8e8e93da0
--- /dev/null
+++ b/src/third_party/unwind/dist/src/sh/Gregs.c
@@ -0,0 +1,81 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+HIDDEN int
+tdep_access_reg (struct cursor *c, unw_regnum_t reg, unw_word_t *valp,
+                 int write)
+{
+  dwarf_loc_t loc = DWARF_NULL_LOC;
+
+  switch (reg)
+    {
+    case UNW_SH_PC:
+      if (write)
+        c->dwarf.ip = *valp;            /* update the IP cache */
+    case UNW_SH_R0:
+    case UNW_SH_R1:
+    case UNW_SH_R2:
+    case UNW_SH_R3:
+    case UNW_SH_R4:
+    case UNW_SH_R5:
+    case UNW_SH_R6:
+    case UNW_SH_R7:
+    case UNW_SH_R8:
+    case UNW_SH_R9:
+    case UNW_SH_R10:
+    case UNW_SH_R11:
+    case UNW_SH_R12:
+    case UNW_SH_R13:
+    case UNW_SH_R14:
+    case UNW_SH_PR:
+      loc = c->dwarf.loc[reg];
+      break;
+
+    case UNW_SH_R15:
+      if (write)
+        return -UNW_EREADONLYREG;
+      *valp = c->dwarf.cfa;
+      return 0;
+
+    default:
+      Debug (1, "bad register number %u\n", reg);
+      return -UNW_EBADREG;
+    }
+
+  if (write)
+    return dwarf_put (&c->dwarf, loc, *valp);
+  else
+    return dwarf_get (&c->dwarf, loc, valp);
+}
+
+HIDDEN int
+tdep_access_fpreg (struct cursor *c, unw_regnum_t reg, unw_fpreg_t *valp,
+                   int write)
+{
+  Debug (1, "bad register number %u\n", reg);
+  return -UNW_EBADREG;
+}
diff --git a/src/third_party/unwind/dist/src/sh/Gresume.c b/src/third_party/unwind/dist/src/sh/Gresume.c
new file mode 100644
index 00000000000..a263c92718a
--- /dev/null
+++ b/src/third_party/unwind/dist/src/sh/Gresume.c
@@ -0,0 +1,165 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright 2011 Linaro Limited
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "offsets.h"
+
+#ifndef UNW_REMOTE_ONLY
+
+HIDDEN inline int
+sh_local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg)
+{
+#ifdef __linux__
+  struct cursor *c = (struct cursor *) cursor;
+  unw_tdep_context_t *uc = c->dwarf.as_arg;
+
+  if (c->sigcontext_format == SH_SCF_NONE)
+    {
+      /* Since there are no signals involved here we restore the non scratch
+         registers only.  */
+      unsigned long regs[8];
+      regs[0] = uc->uc_mcontext.gregs[8];
+      regs[1] = uc->uc_mcontext.gregs[9];
+      regs[2] = uc->uc_mcontext.gregs[10];
+      regs[3] = uc->uc_mcontext.gregs[11];
+      regs[4] = uc->uc_mcontext.gregs[12];
+      regs[5] = uc->uc_mcontext.gregs[13];
+      regs[6] = uc->uc_mcontext.gregs[14];
+      regs[7] = uc->uc_mcontext.gregs[15];
+      unsigned long pc = uc->uc_mcontext.pr;
+
+      struct regs_overlay {
+        char x[sizeof(regs)];
+      };
+
+      asm volatile (
+        "mov.l @%0+, r8\n"
+        "mov.l @%0+, r9\n"
+        "mov.l @%0+, r10\n"
+        "mov.l @%0+, r11\n"
+        "mov.l @%0+, r12\n"
+        "mov.l @%0+, r13\n"
+        "mov.l @%0+, r14\n"
+        "mov.l @%0,  r15\n"
+        "lds %1, pr\n"
+        "rts\n"
+        "nop\n"
+        :
+        : "r" (regs),
+          "r" (pc),
+          "m" (*(struct regs_overlay *)regs)
+      );
+    }
+  else
+    {
+      /* In case a signal frame is involved, we're using its trampoline which
+         calls sigreturn.  */
+      struct sigcontext *sc = (struct sigcontext *) c->sigcontext_addr;
+      sc->sc_regs[0] = uc->uc_mcontext.gregs[0];
+      sc->sc_regs[1] = uc->uc_mcontext.gregs[1];
+      sc->sc_regs[2] = uc->uc_mcontext.gregs[2];
+      sc->sc_regs[3] = uc->uc_mcontext.gregs[3];
+      sc->sc_regs[4] = uc->uc_mcontext.gregs[4];
+      sc->sc_regs[5] = uc->uc_mcontext.gregs[5];
+      sc->sc_regs[6] = uc->uc_mcontext.gregs[6];
+      sc->sc_regs[7] = uc->uc_mcontext.gregs[7];
+      sc->sc_regs[8] = uc->uc_mcontext.gregs[8];
+      sc->sc_regs[9] = uc->uc_mcontext.gregs[9];
+      sc->sc_regs[10] = uc->uc_mcontext.gregs[10];
+      sc->sc_regs[11] = uc->uc_mcontext.gregs[11];
+      sc->sc_regs[12] = uc->uc_mcontext.gregs[12];
+      sc->sc_regs[13] = uc->uc_mcontext.gregs[13];
+      sc->sc_regs[14] = uc->uc_mcontext.gregs[14];
+      sc->sc_regs[15] = uc->uc_mcontext.gregs[15];
+      sc->sc_pc = uc->uc_mcontext.pc;
+      sc->sc_pr = uc->uc_mcontext.pr;
+
+      /* Set the SP and the PC in order to continue execution at the modified
+         trampoline which restores the signal mask and the registers.  */
+      asm __volatile__ (
+        "mov %0, r15\n"
+        "lds %1, pr\n"
+        "rts\n"
+        "nop\n"
+        :
+        : "r" (c->sigcontext_sp),
+          "r" (c->sigcontext_pc)
+      );
+   }
+  unreachable();
+#endif
+  return -UNW_EINVAL;
+}
+
+#endif /* !UNW_REMOTE_ONLY */
+
+static inline void
+establish_machine_state (struct cursor *c)
+{
+  unw_addr_space_t as = c->dwarf.as;
+  void *arg = c->dwarf.as_arg;
+  unw_fpreg_t fpval;
+  unw_word_t val;
+  int reg;
+
+  Debug (8, "copying out cursor state\n");
+
+  for (reg = 0; reg <= UNW_REG_LAST; ++reg)
+    {
+      Debug (16, "copying %s %d\n", unw_regname (reg), reg);
+      if (unw_is_fpreg (reg))
+        {
+          if (tdep_access_fpreg (c, reg, &fpval, 0) >= 0)
+            as->acc.access_fpreg (as, reg, &fpval, 1, arg);
+        }
+      else
+        {
+          if (tdep_access_reg (c, reg, &val, 0) >= 0)
+            as->acc.access_reg (as, reg, &val, 1, arg);
+        }
+    }
+}
+
+int
+unw_resume (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  if (!c->dwarf.ip)
+    {
+      /* This can happen easily when the frame-chain gets truncated
+         due to bad or missing unwind-info.  */
+      Debug (1, "refusing to resume execution at address 0\n");
+      return -UNW_EINVAL;
+    }
+
+  establish_machine_state (c);
+
+  return (*c->dwarf.as->acc.resume) (c->dwarf.as, (unw_cursor_t *) c,
+                                     c->dwarf.as_arg);
+}
diff --git a/src/third_party/unwind/dist/src/sh/Gstep.c b/src/third_party/unwind/dist/src/sh/Gstep.c
new file mode 100644
index 00000000000..60d7ec2ba9f
--- /dev/null
+++ b/src/third_party/unwind/dist/src/sh/Gstep.c
@@ -0,0 +1,117 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright 2011 Linaro Limited
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "offsets.h"
+
+static int
+sh_handle_signal_frame (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  int ret;
+  unw_word_t sc_addr, sp, sp_addr = c->dwarf.cfa;
+  struct dwarf_loc sp_loc = DWARF_LOC (sp_addr, 0);
+
+  if ((ret = dwarf_get (&c->dwarf, sp_loc, &sp)) < 0)
+    return -UNW_EUNSPEC;
+
+  ret = unw_is_signal_frame (cursor);
+  Debug(1, "unw_is_signal_frame()=%d\n", ret);
+
+  /* Save the SP and PC to be able to return execution at this point
+     later in time (unw_resume).  */
+  c->sigcontext_sp = c->dwarf.cfa;
+  c->sigcontext_pc = c->dwarf.ip;
+
+  if (ret == 1)
+    {
+      /* Handle non-RT signal frame. */
+      c->sigcontext_format = SH_SCF_LINUX_SIGFRAME;
+      sc_addr = sp_addr;
+    }
+  else if (ret == 2)
+    {
+      /* Handle RT signal frame. */
+      c->sigcontext_format = SH_SCF_LINUX_RT_SIGFRAME;
+      sc_addr = sp_addr + sizeof (siginfo_t) + LINUX_UC_MCONTEXT_OFF;
+    }
+  else
+    return -UNW_EUNSPEC;
+
+  c->sigcontext_addr = sc_addr;
+
+  /* Update the dwarf cursor.
+     Set the location of the registers to the corresponding addresses of the
+     uc_mcontext / sigcontext structure contents.  */
+  c->dwarf.loc[UNW_SH_R0]  = DWARF_LOC (sc_addr + LINUX_SC_R0_OFF, 0);
+  c->dwarf.loc[UNW_SH_R1]  = DWARF_LOC (sc_addr + LINUX_SC_R1_OFF, 0);
+  c->dwarf.loc[UNW_SH_R2]  = DWARF_LOC (sc_addr + LINUX_SC_R2_OFF, 0);
+  c->dwarf.loc[UNW_SH_R3]  = DWARF_LOC (sc_addr + LINUX_SC_R3_OFF, 0);
+  c->dwarf.loc[UNW_SH_R4]  = DWARF_LOC (sc_addr + LINUX_SC_R4_OFF, 0);
+  c->dwarf.loc[UNW_SH_R5]  = DWARF_LOC (sc_addr + LINUX_SC_R5_OFF, 0);
+  c->dwarf.loc[UNW_SH_R6]  = DWARF_LOC (sc_addr + LINUX_SC_R6_OFF, 0);
+  c->dwarf.loc[UNW_SH_R7]  = DWARF_LOC (sc_addr + LINUX_SC_R7_OFF, 0);
+  c->dwarf.loc[UNW_SH_R8]  = DWARF_LOC (sc_addr + LINUX_SC_R8_OFF, 0);
+  c->dwarf.loc[UNW_SH_R9]  = DWARF_LOC (sc_addr + LINUX_SC_R9_OFF, 0);
+  c->dwarf.loc[UNW_SH_R10] = DWARF_LOC (sc_addr + LINUX_SC_R10_OFF, 0);
+  c->dwarf.loc[UNW_SH_R11] = DWARF_LOC (sc_addr + LINUX_SC_R11_OFF, 0);
+  c->dwarf.loc[UNW_SH_R12] = DWARF_LOC (sc_addr + LINUX_SC_R12_OFF, 0);
+  c->dwarf.loc[UNW_SH_R13] = DWARF_LOC (sc_addr + LINUX_SC_R13_OFF, 0);
+  c->dwarf.loc[UNW_SH_R14] = DWARF_LOC (sc_addr + LINUX_SC_R14_OFF, 0);
+  c->dwarf.loc[UNW_SH_R15] = DWARF_LOC (sc_addr + LINUX_SC_R15_OFF, 0);
+  c->dwarf.loc[UNW_SH_PR]  = DWARF_LOC (sc_addr + LINUX_SC_PR_OFF, 0);
+  c->dwarf.loc[UNW_SH_PC]  = DWARF_LOC (sc_addr + LINUX_SC_PC_OFF, 0);
+
+  /* Set SP/CFA and PC/IP.  */
+  dwarf_get (&c->dwarf, c->dwarf.loc[UNW_SH_R15], &c->dwarf.cfa);
+  dwarf_get (&c->dwarf, c->dwarf.loc[UNW_SH_PC], &c->dwarf.ip);
+
+  c->dwarf.pi_valid = 0;
+
+  return 1;
+}
+
+int
+unw_step (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  int ret;
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  if (unw_is_signal_frame (cursor) > 0)
+    return sh_handle_signal_frame (cursor);
+
+  ret = dwarf_step (&c->dwarf);
+
+  if (unlikely (ret == -UNW_ESTOPUNWIND))
+    return ret;
+
+  if (unlikely (ret < 0))
+    return 0;
+
+  return (c->dwarf.ip == 0) ? 0 : 1;
+}
diff --git a/src/third_party/unwind/dist/src/sh/Lapply_reg_state.c b/src/third_party/unwind/dist/src/sh/Lapply_reg_state.c
new file mode 100644
index 00000000000..7ebada480e5
--- /dev/null
+++ b/src/third_party/unwind/dist/src/sh/Lapply_reg_state.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gapply_reg_state.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/sh/Lcreate_addr_space.c b/src/third_party/unwind/dist/src/sh/Lcreate_addr_space.c
new file mode 100644
index 00000000000..0f2dc6be901
--- /dev/null
+++ b/src/third_party/unwind/dist/src/sh/Lcreate_addr_space.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gcreate_addr_space.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/sh/Lget_proc_info.c b/src/third_party/unwind/dist/src/sh/Lget_proc_info.c
new file mode 100644
index 00000000000..69028b019fc
--- /dev/null
+++ b/src/third_party/unwind/dist/src/sh/Lget_proc_info.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gget_proc_info.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/sh/Lget_save_loc.c b/src/third_party/unwind/dist/src/sh/Lget_save_loc.c
new file mode 100644
index 00000000000..9ea048a9076
--- /dev/null
+++ b/src/third_party/unwind/dist/src/sh/Lget_save_loc.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gget_save_loc.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/sh/Lglobal.c b/src/third_party/unwind/dist/src/sh/Lglobal.c
new file mode 100644
index 00000000000..6d7b489e14b
--- /dev/null
+++ b/src/third_party/unwind/dist/src/sh/Lglobal.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gglobal.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/sh/Linit.c b/src/third_party/unwind/dist/src/sh/Linit.c
new file mode 100644
index 00000000000..e9abfdd46a3
--- /dev/null
+++ b/src/third_party/unwind/dist/src/sh/Linit.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/sh/Linit_local.c b/src/third_party/unwind/dist/src/sh/Linit_local.c
new file mode 100644
index 00000000000..68a1687e854
--- /dev/null
+++ b/src/third_party/unwind/dist/src/sh/Linit_local.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit_local.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/sh/Linit_remote.c b/src/third_party/unwind/dist/src/sh/Linit_remote.c
new file mode 100644
index 00000000000..58cb04ab7cd
--- /dev/null
+++ b/src/third_party/unwind/dist/src/sh/Linit_remote.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit_remote.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/sh/Lis_signal_frame.c b/src/third_party/unwind/dist/src/sh/Lis_signal_frame.c
new file mode 100644
index 00000000000..b9a7c4f51ad
--- /dev/null
+++ b/src/third_party/unwind/dist/src/sh/Lis_signal_frame.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gis_signal_frame.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/sh/Lreg_states_iterate.c b/src/third_party/unwind/dist/src/sh/Lreg_states_iterate.c
new file mode 100644
index 00000000000..f1eb1e79dcd
--- /dev/null
+++ b/src/third_party/unwind/dist/src/sh/Lreg_states_iterate.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Greg_states_iterate.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/sh/Lregs.c b/src/third_party/unwind/dist/src/sh/Lregs.c
new file mode 100644
index 00000000000..2c9c75cd7d9
--- /dev/null
+++ b/src/third_party/unwind/dist/src/sh/Lregs.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gregs.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/sh/Lresume.c b/src/third_party/unwind/dist/src/sh/Lresume.c
new file mode 100644
index 00000000000..41a8cf003de
--- /dev/null
+++ b/src/third_party/unwind/dist/src/sh/Lresume.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gresume.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/sh/Lstep.c b/src/third_party/unwind/dist/src/sh/Lstep.c
new file mode 100644
index 00000000000..c1ac3c7547f
--- /dev/null
+++ b/src/third_party/unwind/dist/src/sh/Lstep.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gstep.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/sh/init.h b/src/third_party/unwind/dist/src/sh/init.h
new file mode 100644
index 00000000000..36713fe89b0
--- /dev/null
+++ b/src/third_party/unwind/dist/src/sh/init.h
@@ -0,0 +1,73 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+static inline int
+common_init (struct cursor *c, unsigned use_prev_instr)
+{
+  int ret;
+
+  c->dwarf.loc[UNW_SH_R0]  = DWARF_REG_LOC (&c->dwarf, UNW_SH_R0);
+  c->dwarf.loc[UNW_SH_R1]  = DWARF_REG_LOC (&c->dwarf, UNW_SH_R1);
+  c->dwarf.loc[UNW_SH_R2]  = DWARF_REG_LOC (&c->dwarf, UNW_SH_R2);
+  c->dwarf.loc[UNW_SH_R3]  = DWARF_REG_LOC (&c->dwarf, UNW_SH_R3);
+  c->dwarf.loc[UNW_SH_R4]  = DWARF_REG_LOC (&c->dwarf, UNW_SH_R4);
+  c->dwarf.loc[UNW_SH_R5]  = DWARF_REG_LOC (&c->dwarf, UNW_SH_R5);
+  c->dwarf.loc[UNW_SH_R6]  = DWARF_REG_LOC (&c->dwarf, UNW_SH_R6);
+  c->dwarf.loc[UNW_SH_R7]  = DWARF_REG_LOC (&c->dwarf, UNW_SH_R7);
+  c->dwarf.loc[UNW_SH_R8]  = DWARF_REG_LOC (&c->dwarf, UNW_SH_R8);
+  c->dwarf.loc[UNW_SH_R9]  = DWARF_REG_LOC (&c->dwarf, UNW_SH_R9);
+  c->dwarf.loc[UNW_SH_R10] = DWARF_REG_LOC (&c->dwarf, UNW_SH_R10);
+  c->dwarf.loc[UNW_SH_R11] = DWARF_REG_LOC (&c->dwarf, UNW_SH_R11);
+  c->dwarf.loc[UNW_SH_R12] = DWARF_REG_LOC (&c->dwarf, UNW_SH_R12);
+  c->dwarf.loc[UNW_SH_R13] = DWARF_REG_LOC (&c->dwarf, UNW_SH_R13);
+  c->dwarf.loc[UNW_SH_R14] = DWARF_REG_LOC (&c->dwarf, UNW_SH_R14);
+  c->dwarf.loc[UNW_SH_R15] = DWARF_REG_LOC (&c->dwarf, UNW_SH_R15);
+  c->dwarf.loc[UNW_SH_PC]  = DWARF_REG_LOC (&c->dwarf, UNW_SH_PC);
+  c->dwarf.loc[UNW_SH_PR]  = DWARF_REG_LOC (&c->dwarf, UNW_SH_PR);
+
+  ret = dwarf_get (&c->dwarf, c->dwarf.loc[UNW_SH_PC], &c->dwarf.ip);
+  if (ret < 0)
+    return ret;
+
+  ret = dwarf_get (&c->dwarf, c->dwarf.loc[UNW_TDEP_SP], &c->dwarf.cfa);
+  if (ret < 0)
+    return ret;
+
+  c->sigcontext_format = SH_SCF_NONE;
+  c->sigcontext_addr = 0;
+  c->sigcontext_sp = 0;
+  c->sigcontext_pc = 0;
+
+  c->dwarf.args_size = 0;
+  c->dwarf.stash_frames = 0;
+  c->dwarf.use_prev_instr = use_prev_instr;
+  c->dwarf.pi_valid = 0;
+  c->dwarf.pi_is_dynamic = 0;
+  c->dwarf.hint = 0;
+  c->dwarf.prev_rs = 0;
+
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/sh/is_fpreg.c b/src/third_party/unwind/dist/src/sh/is_fpreg.c
new file mode 100644
index 00000000000..de093401941
--- /dev/null
+++ b/src/third_party/unwind/dist/src/sh/is_fpreg.c
@@ -0,0 +1,32 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "libunwind_i.h"
+
+int
+unw_is_fpreg (int regnum)
+{
+  /* FIXME: Support FP.  */
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/sh/offsets.h b/src/third_party/unwind/dist/src/sh/offsets.h
new file mode 100644
index 00000000000..b02d8aee1e0
--- /dev/null
+++ b/src/third_party/unwind/dist/src/sh/offsets.h
@@ -0,0 +1,32 @@
+/* Linux-specific definitions: */
+
+/* Define various structure offsets to simplify cross-compilation.  */
+
+/* Offsets for SH Linux "ucontext_t":  */
+
+#define LINUX_UC_FLAGS_OFF      0x0
+#define LINUX_UC_LINK_OFF       0x4
+#define LINUX_UC_STACK_OFF      0x8
+#define LINUX_UC_MCONTEXT_OFF   0x14
+#define LINUX_UC_SIGMASK_OFF    0xFC
+
+/* Offsets for SH Linux "struct sigcontext":  */
+
+#define LINUX_SC_R0_OFF 0x4
+#define LINUX_SC_R1_OFF 0x8
+#define LINUX_SC_R2_OFF 0xC
+#define LINUX_SC_R3_OFF 0x10
+#define LINUX_SC_R4_OFF 0x14
+#define LINUX_SC_R5_OFF 0x18
+#define LINUX_SC_R6_OFF 0x1C
+#define LINUX_SC_R7_OFF 0x20
+#define LINUX_SC_R8_OFF 0x24
+#define LINUX_SC_R9_OFF 0x28
+#define LINUX_SC_R10_OFF        0x2C
+#define LINUX_SC_R11_OFF        0x30
+#define LINUX_SC_R12_OFF        0x34
+#define LINUX_SC_R13_OFF        0x38
+#define LINUX_SC_R14_OFF        0x3C
+#define LINUX_SC_R15_OFF        0x40
+#define LINUX_SC_PC_OFF 0x44
+#define LINUX_SC_PR_OFF 0x48
diff --git a/src/third_party/unwind/dist/src/sh/regname.c b/src/third_party/unwind/dist/src/sh/regname.c
new file mode 100644
index 00000000000..b52925b4da7
--- /dev/null
+++ b/src/third_party/unwind/dist/src/sh/regname.c
@@ -0,0 +1,56 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+static const char *const regname[] =
+  {
+    [UNW_SH_R0]  = "r0",
+    [UNW_SH_R1]  = "r1",
+    [UNW_SH_R2]  = "r2",
+    [UNW_SH_R3]  = "r3",
+    [UNW_SH_R4]  = "r4",
+    [UNW_SH_R5]  = "r5",
+    [UNW_SH_R6]  = "r6",
+    [UNW_SH_R7]  = "r7",
+    [UNW_SH_R8]  = "r8",
+    [UNW_SH_R9]  = "r9",
+    [UNW_SH_R10] = "r10",
+    [UNW_SH_R11] = "r11",
+    [UNW_SH_R12] = "r12",
+    [UNW_SH_R13] = "r13",
+    [UNW_SH_R14] = "r14",
+    [UNW_SH_R15] = "r15",
+    [UNW_SH_PC]  = "pc",
+    [UNW_SH_PR]  = "pr",
+  };
+
+const char *
+unw_regname (unw_regnum_t reg)
+{
+  if (reg < (unw_regnum_t) ARRAY_SIZE (regname) && regname[reg] != NULL)
+    return regname[reg];
+  else
+    return "???";
+}
diff --git a/src/third_party/unwind/dist/src/sh/siglongjmp.S b/src/third_party/unwind/dist/src/sh/siglongjmp.S
new file mode 100644
index 00000000000..9ca53d124b9
--- /dev/null
+++ b/src/third_party/unwind/dist/src/sh/siglongjmp.S
@@ -0,0 +1,8 @@
+	/* Dummy implementation for now.  */
+
+	.globl _UI_siglongjmp_cont
+	.globl _UI_longjmp_cont
+
+_UI_siglongjmp_cont:
+_UI_longjmp_cont:
+	rts
diff --git a/src/third_party/unwind/dist/src/sh/unwind_i.h b/src/third_party/unwind/dist/src/sh/unwind_i.h
new file mode 100644
index 00000000000..3066d84631e
--- /dev/null
+++ b/src/third_party/unwind/dist/src/sh/unwind_i.h
@@ -0,0 +1,40 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef unwind_i_h
+#define unwind_i_h
+
+#include <libunwind-sh.h>
+
+#include "libunwind_i.h"
+
+#define sh_lock                         UNW_OBJ(lock)
+#define sh_local_resume                 UNW_OBJ(local_resume)
+#define sh_local_addr_space_init        UNW_OBJ(local_addr_space_init)
+
+extern void sh_local_addr_space_init (void);
+extern int sh_local_resume (unw_addr_space_t as, unw_cursor_t *cursor,
+                            void *arg);
+
+#endif /* unwind_i_h */
diff --git a/src/third_party/unwind/dist/src/tilegx/Gapply_reg_state.c b/src/third_party/unwind/dist/src/tilegx/Gapply_reg_state.c
new file mode 100644
index 00000000000..82f056da67e
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/Gapply_reg_state.c
@@ -0,0 +1,37 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_apply_reg_state (unw_cursor_t *cursor,
+		     void *reg_states_data)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  return dwarf_apply_reg_state (&c->dwarf, (dwarf_reg_state_t *)reg_states_data);
+}
diff --git a/src/third_party/unwind/dist/src/tilegx/Gcreate_addr_space.c b/src/third_party/unwind/dist/src/tilegx/Gcreate_addr_space.c
new file mode 100644
index 00000000000..39acdc2c3d3
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/Gcreate_addr_space.c
@@ -0,0 +1,65 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2014 Tilera Corp.
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <stdlib.h>
+
+#include "unwind_i.h"
+
+unw_addr_space_t
+unw_create_addr_space (unw_accessors_t *a, int byte_order)
+{
+#ifdef UNW_LOCAL_ONLY
+  return NULL;
+#else
+  unw_addr_space_t as = malloc (sizeof (*as));
+
+  if (!as)
+    return NULL;
+
+  memset (as, 0, sizeof (*as));
+
+  as->acc = *a;
+
+  /*
+   * Tilegx supports only big or little-endian, not weird stuff like
+   * PDP_ENDIAN.
+   */
+  if (byte_order != 0
+      && byte_order != __LITTLE_ENDIAN
+      && byte_order != __BIG_ENDIAN)
+    return NULL;
+
+  if (byte_order == 0)
+    /* use host default: */
+    as->big_endian = (__BYTE_ORDER == __BIG_ENDIAN);
+  else
+    as->big_endian = (byte_order == __BIG_ENDIAN);
+
+  as->abi = UNW_TILEGX_ABI_N64;
+  as->addr_size = 8;
+
+  return as;
+#endif
+}
diff --git a/src/third_party/unwind/dist/src/tilegx/Gget_proc_info.c b/src/third_party/unwind/dist/src/tilegx/Gget_proc_info.c
new file mode 100644
index 00000000000..3a158da2df7
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/Gget_proc_info.c
@@ -0,0 +1,48 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2014 Tilera Corp.
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_get_proc_info (unw_cursor_t *cursor, unw_proc_info_t *pi)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  int ret;
+
+  ret = dwarf_make_proc_info (&c->dwarf);
+
+  if (ret < 0)
+  {
+    /* On Tilegx, some routines i.e. _start() etc has no dwarf info.
+       Just simply mark the end of the frames. */
+    memset (pi, 0, sizeof (*pi));
+    pi->start_ip = c->dwarf.ip;
+    pi->end_ip = c->dwarf.ip + 1;
+    return 0;
+  }
+
+  *pi = c->dwarf.pi;
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/tilegx/Gget_save_loc.c b/src/third_party/unwind/dist/src/tilegx/Gget_save_loc.c
new file mode 100644
index 00000000000..fcf06978928
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/Gget_save_loc.c
@@ -0,0 +1,62 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2014 Tilera Corp.
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_get_save_loc (unw_cursor_t *cursor, int reg, unw_save_loc_t *sloc)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  dwarf_loc_t loc;
+
+  loc = DWARF_NULL_LOC;       /* default to "not saved" */
+
+  if (reg <= UNW_TILEGX_R55)
+    loc = c->dwarf.loc[reg - UNW_TILEGX_R0];
+  else
+    printf("\nInvalid register!");
+
+  memset (sloc, 0, sizeof (*sloc));
+
+  if (DWARF_IS_NULL_LOC (loc))
+    {
+      sloc->type = UNW_SLT_NONE;
+      return 0;
+    }
+
+#if !defined(UNW_LOCAL_ONLY)
+  if (DWARF_IS_REG_LOC (loc))
+    {
+      sloc->type = UNW_SLT_REG;
+      sloc->u.regnum = DWARF_GET_LOC (loc);
+    }
+  else
+#endif
+    {
+      sloc->type = UNW_SLT_MEMORY;
+      sloc->u.addr = DWARF_GET_LOC (loc);
+    }
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/tilegx/Gglobal.c b/src/third_party/unwind/dist/src/tilegx/Gglobal.c
new file mode 100644
index 00000000000..e18f50a50f3
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/Gglobal.c
@@ -0,0 +1,64 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2014 Tilera Corp.
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "dwarf_i.h"
+
+__attribute__((weak))
+pthread_mutex_t tilegx_lock = PTHREAD_MUTEX_INITIALIZER;
+HIDDEN int tdep_init_done;
+
+HIDDEN const uint8_t dwarf_to_unw_regnum_map[] =
+  {
+    0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
+    16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
+    32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
+    48, 49, 50, 51, 52, 53, 54, 55
+  };
+
+HIDDEN void
+tdep_init (void)
+{
+  intrmask_t saved_mask;
+
+  sigfillset (&unwi_full_mask);
+
+  lock_acquire (&tilegx_lock, saved_mask);
+
+  if (tdep_init_done)
+    /* another thread else beat us to it... */
+    goto out;
+
+  mi_init ();
+  dwarf_init ();
+
+#ifndef UNW_REMOTE_ONLY
+  tilegx_local_addr_space_init ();
+#endif
+  tdep_init_done = 1;  /* signal that we're initialized... */
+
+ out:
+  lock_release (&tilegx_lock, saved_mask);
+}
diff --git a/src/third_party/unwind/dist/src/tilegx/Ginit.c b/src/third_party/unwind/dist/src/tilegx/Ginit.c
new file mode 100644
index 00000000000..7564a558be4
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/Ginit.c
@@ -0,0 +1,167 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2014 Tilera Corp.
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "unwind_i.h"
+
+#ifdef UNW_REMOTE_ONLY
+
+/* unw_local_addr_space is a NULL pointer in this case.  */
+unw_addr_space_t unw_local_addr_space;
+
+#else /* !UNW_REMOTE_ONLY */
+
+static struct unw_addr_space local_addr_space;
+
+unw_addr_space_t unw_local_addr_space = &local_addr_space;
+
+/* Return the address of the 64-bit slot in UC for REG (even for o32,
+   where registers are 32-bit, the slots are still 64-bit).  */
+
+static inline void *
+uc_addr (ucontext_t *uc, int reg)
+{
+  if (reg >= UNW_TILEGX_R0 && reg < UNW_TILEGX_R0 + 56)
+    return &uc->uc_mcontext.gregs[reg - UNW_TILEGX_R0];
+  else if (reg == UNW_TILEGX_PC)
+    return &uc->uc_mcontext.pc;
+  else
+    return NULL;
+}
+
+# ifdef UNW_LOCAL_ONLY
+
+HIDDEN void *
+tdep_uc_addr (ucontext_t *uc, int reg)
+{
+  char *addr = uc_addr (uc, reg);
+  return addr;
+}
+
+# endif /* UNW_LOCAL_ONLY */
+
+HIDDEN unw_dyn_info_list_t _U_dyn_info_list;
+
+/* XXX fix me: there is currently no way to locate the dyn-info list
+       by a remote unwinder.  On ia64, this is done via a special
+       unwind-table entry.  Perhaps something similar can be done with
+       DWARF2 unwind info.  */
+
+static void
+put_unwind_info (unw_addr_space_t as, unw_proc_info_t *proc_info, void *arg)
+{
+  /* it's a no-op */
+}
+
+static int
+get_dyn_info_list_addr (unw_addr_space_t as, unw_word_t *dyn_info_list_addr,
+                        void *arg)
+{
+  *dyn_info_list_addr = (unw_word_t) (intptr_t) &_U_dyn_info_list;
+  return 0;
+}
+
+static int
+access_mem (unw_addr_space_t as, unw_word_t addr, unw_word_t *val, int write,
+            void *arg)
+{
+  if ((long long)addr & (sizeof(unw_word_t) - 1))
+    return 0;
+
+  if (write)
+    {
+      Debug (16, "mem[%llx] <- %llx\n", (long long) addr, (long long) *val);
+      *(unw_word_t *) (intptr_t) addr = *val;
+    }
+  else
+    {
+      *val = *(unw_word_t *) (intptr_t) addr;
+      Debug (16, "mem[%llx] -> %llx\n", (long long) addr, (long long) *val);
+    }
+  return 0;
+}
+
+static int
+access_reg (unw_addr_space_t as, unw_regnum_t reg, unw_word_t *val, int write,
+            void *arg)
+{
+  unw_word_t *addr;
+  ucontext_t *uc = arg;
+
+  if (unw_is_fpreg (reg))
+    goto badreg;
+
+  Debug (16, "reg = %s\n", unw_regname (reg));
+  if (!(addr = uc_addr (uc, reg)))
+    goto badreg;
+
+  if (write)
+    {
+      *(unw_word_t *) (intptr_t) addr = (tilegx_reg_t) *val;
+      Debug (12, "%s <- %llx\n", unw_regname (reg), (long long) *val);
+    }
+  else
+    {
+      *val = (tilegx_reg_t) *(unw_word_t *) (intptr_t) addr;
+      Debug (12, "%s -> %llx\n", unw_regname (reg), (long long) *val);
+    }
+  return 0;
+
+ badreg:
+  Debug (1, "bad register number %u\n", reg);
+  return -UNW_EBADREG;
+}
+
+static int
+get_static_proc_name (unw_addr_space_t as, unw_word_t ip,
+                      char *buf, size_t buf_len, unw_word_t *offp,
+                      void *arg)
+{
+  return elf_w (get_proc_name) (as, getpid (), ip, buf, buf_len, offp);
+}
+
+__attribute__((weak)) void
+tilegx_local_addr_space_init (void)
+{
+  memset (&local_addr_space, 0, sizeof (local_addr_space));
+  local_addr_space.big_endian = (__BYTE_ORDER == __BIG_ENDIAN);
+
+  local_addr_space.abi = UNW_TILEGX_ABI_N64;
+  local_addr_space.addr_size = sizeof (void *);
+  local_addr_space.caching_policy = UNWI_DEFAULT_CACHING_POLICY;
+  local_addr_space.acc.find_proc_info = dwarf_find_proc_info;
+  local_addr_space.acc.put_unwind_info = put_unwind_info;
+  local_addr_space.acc.get_dyn_info_list_addr = get_dyn_info_list_addr;
+  local_addr_space.acc.access_mem = access_mem;
+  local_addr_space.acc.access_reg = access_reg;
+  local_addr_space.acc.access_fpreg = NULL;
+  local_addr_space.acc.resume = tilegx_local_resume;
+  local_addr_space.acc.get_proc_name = get_static_proc_name;
+  unw_flush_cache (&local_addr_space, 0, 0);
+}
+
+#endif /* !UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/dist/src/tilegx/Ginit_local.c b/src/third_party/unwind/dist/src/tilegx/Ginit_local.c
new file mode 100644
index 00000000000..31a716df348
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/Ginit_local.c
@@ -0,0 +1,80 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2014 Tilera Corp.
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "init.h"
+
+#ifdef UNW_REMOTE_ONLY
+
+int
+unw_init_local (unw_cursor_t *cursor, ucontext_t *uc)
+{
+  return -UNW_EINVAL;
+}
+
+#else /* !UNW_REMOTE_ONLY */
+
+static int
+unw_init_local_common(unw_cursor_t *cursor, ucontext_t *uc, unsigned use_prev_instr)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  if (!tdep_init_done)
+    tdep_init ();
+
+  memset(c, 0, sizeof(unw_cursor_t));
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  c->dwarf.as = unw_local_addr_space;
+
+  c->dwarf.as_arg = uc;
+  return common_init (c, use_prev_instr);
+}
+
+int
+unw_init_local (unw_cursor_t *cursor, ucontext_t *uc)
+{
+  return unw_init_local_common(cursor, uc, 1);
+}
+
+int
+unw_init_local2 (unw_cursor_t *cursor, ucontext_t *uc, int flag)
+{
+  if (!flag)
+    {
+      return unw_init_local_common(cursor, uc, 1);
+    }
+  else if (flag == UNW_INIT_SIGNAL_FRAME)
+    {
+      return unw_init_local_common(cursor, uc, 0);
+    }
+  else
+    {
+      return -UNW_EINVAL;
+    }
+}
+
+#endif /* !UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/dist/src/tilegx/Ginit_remote.c b/src/third_party/unwind/dist/src/tilegx/Ginit_remote.c
new file mode 100644
index 00000000000..2a31b18aaef
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/Ginit_remote.c
@@ -0,0 +1,47 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2014 Tilera Corp.
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "init.h"
+#include "unwind_i.h"
+
+int
+unw_init_remote (unw_cursor_t *cursor, unw_addr_space_t as, void *as_arg)
+{
+#ifdef UNW_LOCAL_ONLY
+  return -UNW_EINVAL;
+#else /* !UNW_LOCAL_ONLY */
+  struct cursor *c = (struct cursor *) cursor;
+
+  if (!tdep_init_done)
+    tdep_init ();
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  c->dwarf.as = as;
+  c->dwarf.as_arg = as_arg;
+
+  return common_init (c, 0);
+#endif /* !UNW_LOCAL_ONLY */
+}
diff --git a/src/third_party/unwind/dist/src/tilegx/Gis_signal_frame.c b/src/third_party/unwind/dist/src/tilegx/Gis_signal_frame.c
new file mode 100644
index 00000000000..5452c2cb2aa
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/Gis_signal_frame.c
@@ -0,0 +1,115 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2014 Tilera Corp.
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include <stdio.h>
+#include "offsets.h"
+
+#ifdef __linux__
+#include <sys/syscall.h>
+#include <arch/abi.h>
+#else
+# error "Only support Linux!"
+#endif
+
+#define  MOVELI_R10_RT_SIGRETURN                         \
+  ( 0x000007e051483000ULL    |                           \
+    ((unsigned long)__NR_rt_sigreturn << 43) |           \
+    ((unsigned long)TREG_SYSCALL_NR << 31) )
+#define  SWINT1      0x286b180051485000ULL
+
+int
+unw_is_signal_frame (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor*) cursor;
+  unw_word_t w0, w1, ip;
+  unw_addr_space_t as;
+  unw_accessors_t *a;
+  void *arg;
+  int ret;
+
+  as = c->dwarf.as;
+  a = unw_get_accessors_int (as);
+  arg = c->dwarf.as_arg;
+
+  ip = c->dwarf.ip;
+
+  if (!ip || !a->access_mem || (ip & (sizeof(unw_word_t) - 1)))
+    return 0;
+
+  if ((ret = (*a->access_mem) (as, ip, &w0, 0, arg)) < 0)
+    return ret;
+
+  if ((ret = (*a->access_mem) (as, ip + 8, &w1, 0, arg)) < 0)
+    return ret;
+
+  /* Return 1 if the IP points to a RT sigreturn sequence. */
+  if (w0 == MOVELI_R10_RT_SIGRETURN &&
+      w1 ==  SWINT1)
+    {
+      return 1;
+    }
+  return 0;
+}
+
+
+HIDDEN int
+tilegx_handle_signal_frame (unw_cursor_t *cursor)
+{
+  int i;
+  struct cursor *c = (struct cursor *) cursor;
+  unw_word_t sc_addr, sp, sp_addr = c->dwarf.cfa;
+  struct dwarf_loc sp_loc = DWARF_LOC (sp_addr, 0);
+  int ret;
+
+  if ((ret = dwarf_get (&c->dwarf, sp_loc, &sp)) < 0)
+    return -UNW_EUNSPEC;
+
+  /* Save the SP and PC to be able to return execution at this point
+     later in time (unw_resume).  */
+  c->sigcontext_sp = c->dwarf.cfa;
+  c->sigcontext_pc = c->dwarf.ip;
+
+  c->sigcontext_addr = sp_addr + sizeof (siginfo_t) +
+    C_ABI_SAVE_AREA_SIZE;
+  sc_addr = c->sigcontext_addr + LINUX_UC_MCONTEXT_OFF;
+
+  /* Update the dwarf cursor.
+     Set the location of the registers to the corresponding addresses of the
+     uc_mcontext / sigcontext structure contents.  */
+
+#define  SC_REG_OFFSET(X)   (8 * X)
+
+  for (i = UNW_TILEGX_R0; i <= UNW_TILEGX_R55; i++)
+    {
+      c->dwarf.loc[i] = DWARF_LOC (sc_addr + SC_REG_OFFSET(i), 0);
+    }
+
+  /* Set SP/CFA and PC/IP.  */
+  dwarf_get (&c->dwarf, c->dwarf.loc[UNW_TILEGX_R54], &c->dwarf.cfa);
+  dwarf_get (&c->dwarf, c->dwarf.loc[UNW_TILEGX_R55], &c->dwarf.ip);
+
+  return 1;
+}
diff --git a/src/third_party/unwind/dist/src/tilegx/Greg_states_iterate.c b/src/third_party/unwind/dist/src/tilegx/Greg_states_iterate.c
new file mode 100644
index 00000000000..a17dc1b561d
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/Greg_states_iterate.c
@@ -0,0 +1,37 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_reg_states_iterate (unw_cursor_t *cursor,
+			unw_reg_states_callback cb, void *token)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  return dwarf_reg_states_iterate (&c->dwarf, cb, token);
+}
diff --git a/src/third_party/unwind/dist/src/tilegx/Gregs.c b/src/third_party/unwind/dist/src/tilegx/Gregs.c
new file mode 100644
index 00000000000..565c6f4432a
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/Gregs.c
@@ -0,0 +1,76 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2014 Tilera Corp.
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+HIDDEN int
+tdep_access_reg (struct cursor *c, unw_regnum_t reg, unw_word_t *valp,
+                 int write)
+{
+  dwarf_loc_t loc = DWARF_NULL_LOC;
+  
+  if (reg == UNW_TILEGX_R54 && !write)
+    {
+      reg = UNW_TILEGX_CFA;
+    }
+  
+  if (reg <= UNW_TILEGX_R55)
+    loc = c->dwarf.loc[reg - UNW_TILEGX_R0];
+  else if (reg == UNW_TILEGX_CFA)
+    {
+      if (write)
+        return -UNW_EREADONLYREG;
+      *valp = c->dwarf.cfa;
+      return 0;
+    }
+  else
+    {
+      Debug (1, "bad register number %u\n", reg);
+      return -UNW_EBADREG;
+    }
+  
+  if (write)
+    {
+      if (ci->dwarf.use_prev_instr == 0) {
+	if (reg == UNW_TILEGX_PC)
+	  c->dwarf.ip = *valp;            /* update the IP cache */
+       }
+      else {
+	if (reg == UNW_TILEGX_R55)
+	  c->dwarf.ip = *valp;            /* update the IP cache */
+      }
+      return dwarf_put (&c->dwarf, loc, *valp);
+    }
+  else
+    return dwarf_get (&c->dwarf, loc, valp);
+}
+
+HIDDEN int
+tdep_access_fpreg (struct cursor *c, unw_regnum_t reg, unw_fpreg_t *valp,
+                   int write)
+{
+  Debug (1, "bad register number %u\n", reg);
+  return -UNW_EBADREG;
+}
diff --git a/src/third_party/unwind/dist/src/tilegx/Gresume.c b/src/third_party/unwind/dist/src/tilegx/Gresume.c
new file mode 100644
index 00000000000..ece443a5b56
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/Gresume.c
@@ -0,0 +1,94 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2014 Tilera Corp.
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+
+#include "unwind_i.h"
+#include "offsets.h"
+#include <ucontext.h>
+
+#ifndef UNW_REMOTE_ONLY
+
+HIDDEN inline int
+tilegx_local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg)
+{
+  int i;
+  struct cursor *c = (struct cursor *) cursor;
+  ucontext_t *uc = c->dwarf.as_arg;
+
+  Debug (1, "(cursor=%p\n", c);
+
+  return setcontext(uc);
+}
+
+#endif /* !UNW_REMOTE_ONLY */
+
+static inline void
+establish_machine_state (struct cursor *c)
+{
+  unw_addr_space_t as = c->dwarf.as;
+  void *arg = c->dwarf.as_arg;
+  unw_fpreg_t fpval;
+  unw_word_t val;
+  int reg;
+
+  Debug (8, "copying out cursor state\n");
+
+  for (reg = 0; reg <= UNW_REG_LAST; ++reg)
+    {
+      Debug (16, "copying %s %d\n", unw_regname (reg), reg);
+
+      if (unw_is_fpreg (reg))
+        {
+          Debug (1, "no fp!");
+          abort ();
+        }
+      else
+        {
+          if (tdep_access_reg (c, reg, &val, 0) >= 0)
+            as->acc.access_reg (as, reg, &val, 1, arg);
+        }
+    }
+}
+
+int
+unw_resume (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  Debug (1, "(cursor=%p) ip=0x%lx\n", c, c->dwarf.ip);
+
+  if (!c->dwarf.ip)
+    {
+      /* This can happen easily when the frame-chain gets truncated
+         due to bad or missing unwind-info.  */
+      Debug (1, "refusing to resume execution at address 0\n");
+      return -UNW_EINVAL;
+    }
+
+  establish_machine_state (c);
+
+  return (*c->dwarf.as->acc.resume) (c->dwarf.as, (unw_cursor_t *) c,
+                                     c->dwarf.as_arg);
+}
diff --git a/src/third_party/unwind/dist/src/tilegx/Gstep.c b/src/third_party/unwind/dist/src/tilegx/Gstep.c
new file mode 100644
index 00000000000..c748dbc588a
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/Gstep.c
@@ -0,0 +1,53 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2014 Tilera Corp.
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "offsets.h"
+
+int
+unw_step (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  int ret;
+
+  Debug (1, "(cursor=%p, ip=0x%016lx, sp=0x%016lx)\n",
+         c, c->dwarf.ip, c->dwarf.cfa);
+
+  /* Special handling the singal frame. */
+  if (unw_is_signal_frame (cursor) > 0)
+    return tilegx_handle_signal_frame (cursor);
+
+  /* Try DWARF-based unwinding... */
+  ret = dwarf_step (&c->dwarf);
+
+  if (unlikely (ret == -UNW_ESTOPUNWIND))
+    return ret;
+
+  /* Dwarf unwinding didn't work, stop.  */
+  if (unlikely (ret < 0))
+    return 0;
+
+  return (c->dwarf.ip == 0) ? 0 : 1;
+}
diff --git a/src/third_party/unwind/dist/src/tilegx/Lapply_reg_state.c b/src/third_party/unwind/dist/src/tilegx/Lapply_reg_state.c
new file mode 100644
index 00000000000..7ebada480e5
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/Lapply_reg_state.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gapply_reg_state.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/tilegx/Lcreate_addr_space.c b/src/third_party/unwind/dist/src/tilegx/Lcreate_addr_space.c
new file mode 100644
index 00000000000..0f2dc6be901
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/Lcreate_addr_space.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gcreate_addr_space.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/tilegx/Lget_proc_info.c b/src/third_party/unwind/dist/src/tilegx/Lget_proc_info.c
new file mode 100644
index 00000000000..69028b019fc
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/Lget_proc_info.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gget_proc_info.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/tilegx/Lget_save_loc.c b/src/third_party/unwind/dist/src/tilegx/Lget_save_loc.c
new file mode 100644
index 00000000000..9ea048a9076
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/Lget_save_loc.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gget_save_loc.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/tilegx/Lglobal.c b/src/third_party/unwind/dist/src/tilegx/Lglobal.c
new file mode 100644
index 00000000000..6d7b489e14b
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/Lglobal.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gglobal.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/tilegx/Linit.c b/src/third_party/unwind/dist/src/tilegx/Linit.c
new file mode 100644
index 00000000000..e9abfdd46a3
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/Linit.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/tilegx/Linit_local.c b/src/third_party/unwind/dist/src/tilegx/Linit_local.c
new file mode 100644
index 00000000000..68a1687e854
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/Linit_local.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit_local.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/tilegx/Linit_remote.c b/src/third_party/unwind/dist/src/tilegx/Linit_remote.c
new file mode 100644
index 00000000000..58cb04ab7cd
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/Linit_remote.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit_remote.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/tilegx/Lis_signal_frame.c b/src/third_party/unwind/dist/src/tilegx/Lis_signal_frame.c
new file mode 100644
index 00000000000..b9a7c4f51ad
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/Lis_signal_frame.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gis_signal_frame.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/tilegx/Lreg_states_iterate.c b/src/third_party/unwind/dist/src/tilegx/Lreg_states_iterate.c
new file mode 100644
index 00000000000..f1eb1e79dcd
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/Lreg_states_iterate.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Greg_states_iterate.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/tilegx/Lregs.c b/src/third_party/unwind/dist/src/tilegx/Lregs.c
new file mode 100644
index 00000000000..2c9c75cd7d9
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/Lregs.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gregs.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/tilegx/Lresume.c b/src/third_party/unwind/dist/src/tilegx/Lresume.c
new file mode 100644
index 00000000000..41a8cf003de
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/Lresume.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gresume.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/tilegx/Lstep.c b/src/third_party/unwind/dist/src/tilegx/Lstep.c
new file mode 100644
index 00000000000..c1ac3c7547f
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/Lstep.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gstep.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/tilegx/getcontext.S b/src/third_party/unwind/dist/src/tilegx/getcontext.S
new file mode 100644
index 00000000000..fbc8654bc7f
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/getcontext.S
@@ -0,0 +1,36 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2014 Tilera Corp.
+        
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "offsets.h"
+#include <endian.h>
+
+        .text
+        # define REG(X)    LINUX_UC_MCONTEXT_GREGS + 8 * (X)
+        .global _Utilegx_getcontext
+        .type   _Utilegx_getcontext, %function
+        # This is a stub version of getcontext() for TILEGX.
+_Utilegx_getcontext:
+
+
diff --git a/src/third_party/unwind/dist/src/tilegx/init.h b/src/third_party/unwind/dist/src/tilegx/init.h
new file mode 100644
index 00000000000..0e0f7fd1da8
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/init.h
@@ -0,0 +1,63 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2014 Tilera Corp.
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+static inline int
+common_init (struct cursor *c, unsigned use_prev_instr)
+{
+  int ret, i;
+
+  for (i = 0; i < 56; i++)
+    c->dwarf.loc[i] = DWARF_REG_LOC (&c->dwarf, UNW_TILEGX_R0 + i);
+  for (i = 56; i < DWARF_NUM_PRESERVED_REGS; ++i)
+    c->dwarf.loc[i] = DWARF_NULL_LOC;
+
+  if (use_prev_instr == 0)
+    ret = dwarf_get (&c->dwarf, DWARF_REG_LOC (&c->dwarf, UNW_TILEGX_PC),
+                     &c->dwarf.ip);
+  else
+    ret = dwarf_get (&c->dwarf, DWARF_REG_LOC (&c->dwarf, UNW_TILEGX_R55),
+                     &c->dwarf.ip);
+
+  if (ret < 0)
+    return ret;
+
+  ret = dwarf_get (&c->dwarf, DWARF_REG_LOC (&c->dwarf, UNW_TILEGX_R54),
+                   &c->dwarf.cfa);
+
+  if (ret < 0)
+    return ret;
+
+  c->dwarf.args_size = 0;
+  c->dwarf.stash_frames = 0;
+  c->dwarf.use_prev_instr = use_prev_instr;
+  c->dwarf.pi_valid = 0;
+  c->dwarf.pi_is_dynamic = 0;
+  c->dwarf.hint = 0;
+  c->dwarf.prev_rs = 0;
+
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/tilegx/is_fpreg.c b/src/third_party/unwind/dist/src/tilegx/is_fpreg.c
new file mode 100644
index 00000000000..d6d58969018
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/is_fpreg.c
@@ -0,0 +1,33 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "libunwind_i.h"
+
+/* TILEGX has no FP. */
+
+int
+unw_is_fpreg (int regnum)
+{
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/tilegx/offsets.h b/src/third_party/unwind/dist/src/tilegx/offsets.h
new file mode 100644
index 00000000000..6d30f1edcff
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/offsets.h
@@ -0,0 +1,12 @@
+/* Linux-specific definitions: */
+
+/* Define various structure offsets to simplify cross-compilation.  */
+
+/* Offsets for TILEGX Linux "ucontext_t":  */
+
+#define LINUX_UC_FLAGS_OFF      0x0
+#define LINUX_UC_LINK_OFF       0x8
+#define LINUX_UC_STACK_OFF      0x10
+#define LINUX_UC_MCONTEXT_OFF   0x28
+#define LINUX_UC_SIGMASK_OFF    0x228
+#define LINUX_UC_MCONTEXT_GREGS 0x28
diff --git a/src/third_party/unwind/dist/src/tilegx/regname.c b/src/third_party/unwind/dist/src/tilegx/regname.c
new file mode 100644
index 00000000000..0ce47b9d66e
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/regname.c
@@ -0,0 +1,55 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+   Copyright (C) 2014 Tilera Corp.
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+static const char *regname[] =
+  {
+    /* 0.  */
+    "r0",  "r1",  "r2",  "r3",  "r4",  "r5",  "r6",  "r7",
+    /* 8.  */
+    "r8",  "r9",  "r10", "r11",  "r12",  "r13",  "r14",  "r15",
+    /* 16.  */
+    "r16",  "r17",  "r18", "r19",  "r20",  "r21",  "r22",  "r23",
+    /* 24.  */
+    "r24",  "r25",  "r26", "r27",  "r28",  "r29",  "r30",  "r31",
+    /* 32.  */
+    "r32",  "r33",  "r34", "r35",  "r36",  "r37",  "r38",  "r39",
+    /* 40.  */
+    "r40",  "r41",  "r42", "r43",  "r44",  "r45",  "r46",  "r47",
+    /* 48.  */
+    "r48",  "r49",  "r50", "r51",  "r52",  "r53",  "r54",  "r55",
+    /* pc, cfa */
+    "pc",  "cfa"
+  };
+
+const char *
+unw_regname (unw_regnum_t reg)
+{
+  if (reg < (unw_regnum_t) ARRAY_SIZE (regname))
+    return regname[reg];
+  else
+    return "???";
+}
diff --git a/src/third_party/unwind/dist/src/tilegx/siglongjmp.S b/src/third_party/unwind/dist/src/tilegx/siglongjmp.S
new file mode 100644
index 00000000000..bccb1c77854
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/siglongjmp.S
@@ -0,0 +1,7 @@
+        /* Dummy implementation for now.  */
+        .globl _UI_siglongjmp_cont
+        .globl _UI_longjmp_cont
+
+_UI_siglongjmp_cont:
+_UI_longjmp_cont:
+        jrp      lr
diff --git a/src/third_party/unwind/dist/src/tilegx/unwind_i.h b/src/third_party/unwind/dist/src/tilegx/unwind_i.h
new file mode 100644
index 00000000000..9d41c90b4d1
--- /dev/null
+++ b/src/third_party/unwind/dist/src/tilegx/unwind_i.h
@@ -0,0 +1,46 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef unwind_i_h
+#define unwind_i_h
+
+#include <memory.h>
+#include <stdint.h>
+
+#include <libunwind-tilegx.h>
+
+#include "libunwind_i.h"
+
+#define tilegx_local_resume            UNW_OBJ(local_resume)
+#define tilegx_local_addr_space_init   UNW_OBJ(local_addr_space_init)
+
+extern int tilegx_local_resume (unw_addr_space_t as,
+                                unw_cursor_t *cursor,
+                                void *arg);
+#define tilegx_handle_signal_frame UNW_OBJ(handle_signal_frame)
+extern int tilegx_handle_signal_frame(unw_cursor_t *cursor);
+
+extern void tilegx_local_addr_space_init (void);
+
+#endif /* unwind_i_h */
diff --git a/src/third_party/unwind/dist/src/unwind/Backtrace.c b/src/third_party/unwind/dist/src/unwind/Backtrace.c
new file mode 100644
index 00000000000..0b14df4cb9d
--- /dev/null
+++ b/src/third_party/unwind/dist/src/unwind/Backtrace.c
@@ -0,0 +1,56 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind-internal.h"
+
+_Unwind_Reason_Code
+_Unwind_Backtrace (_Unwind_Trace_Fn trace, void *trace_parameter)
+{
+  struct _Unwind_Context context;
+  unw_context_t uc;
+  int ret;
+
+  if (_Unwind_InitContext (&context, &uc) < 0)
+    return _URC_FATAL_PHASE1_ERROR;
+
+  /* Phase 1 (search phase) */
+
+  while (1)
+    {
+      if ((ret = unw_step (&context.cursor)) <= 0)
+        {
+          if (ret == 0)
+            return _URC_END_OF_STACK;
+          else
+            return _URC_FATAL_PHASE1_ERROR;
+        }
+
+      if ((*trace) (&context, trace_parameter) != _URC_NO_REASON)
+        return _URC_FATAL_PHASE1_ERROR;
+    }
+}
+
+_Unwind_Reason_Code __libunwind_Unwind_Backtrace (_Unwind_Trace_Fn, void *)
+     ALIAS (_Unwind_Backtrace);
diff --git a/src/third_party/unwind/dist/src/unwind/DeleteException.c b/src/third_party/unwind/dist/src/unwind/DeleteException.c
new file mode 100644
index 00000000000..ad38eaf651e
--- /dev/null
+++ b/src/third_party/unwind/dist/src/unwind/DeleteException.c
@@ -0,0 +1,38 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind-internal.h"
+
+void
+_Unwind_DeleteException (struct _Unwind_Exception *exception_object)
+{
+  _Unwind_Exception_Cleanup_Fn cleanup = exception_object->exception_cleanup;
+
+  if (cleanup)
+    (*cleanup) (_URC_FOREIGN_EXCEPTION_CAUGHT, exception_object);
+}
+
+void __libunwind_Unwind_DeleteException (struct _Unwind_Exception *)
+     ALIAS (_Unwind_DeleteException);
diff --git a/src/third_party/unwind/dist/src/unwind/FindEnclosingFunction.c b/src/third_party/unwind/dist/src/unwind/FindEnclosingFunction.c
new file mode 100644
index 00000000000..4f106661725
--- /dev/null
+++ b/src/third_party/unwind/dist/src/unwind/FindEnclosingFunction.c
@@ -0,0 +1,42 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind-internal.h"
+
+void *
+_Unwind_FindEnclosingFunction (void *ip)
+{
+  unw_proc_info_t pi;
+
+  if (unw_get_proc_info_by_ip (unw_local_addr_space,
+                               (unw_word_t) (uintptr_t) ip, &pi, 0)
+      < 0)
+    return NULL;
+
+  return (void *) (uintptr_t) pi.start_ip;
+}
+
+void *__libunwind_Unwind_FindEnclosingFunction (void *)
+     ALIAS (_Unwind_FindEnclosingFunction);
diff --git a/src/third_party/unwind/dist/src/unwind/ForcedUnwind.c b/src/third_party/unwind/dist/src/unwind/ForcedUnwind.c
new file mode 100644
index 00000000000..905b31cd873
--- /dev/null
+++ b/src/third_party/unwind/dist/src/unwind/ForcedUnwind.c
@@ -0,0 +1,52 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind-internal.h"
+
+_Unwind_Reason_Code
+_Unwind_ForcedUnwind (struct _Unwind_Exception *exception_object,
+                      _Unwind_Stop_Fn stop, void *stop_parameter)
+{
+  struct _Unwind_Context context;
+  unw_context_t uc;
+
+  /* We check "stop" here to tell the compiler's inliner that
+     exception_object->private_1 isn't NULL when calling
+     _Unwind_Phase2().  */
+  if (!stop)
+    return _URC_FATAL_PHASE2_ERROR;
+
+  if (_Unwind_InitContext (&context, &uc) < 0)
+    return _URC_FATAL_PHASE2_ERROR;
+
+  exception_object->private_1 = (unsigned long) stop;
+  exception_object->private_2 = (unsigned long) stop_parameter;
+
+  return _Unwind_Phase2 (exception_object, &context);
+}
+
+_Unwind_Reason_Code __libunwind_Unwind_ForcedUnwind (struct _Unwind_Exception*,
+                                                     _Unwind_Stop_Fn, void *)
+     ALIAS (_Unwind_ForcedUnwind);
diff --git a/src/third_party/unwind/dist/src/unwind/GetBSP.c b/src/third_party/unwind/dist/src/unwind/GetBSP.c
new file mode 100644
index 00000000000..d1bc84e0d20
--- /dev/null
+++ b/src/third_party/unwind/dist/src/unwind/GetBSP.c
@@ -0,0 +1,42 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind-internal.h"
+
+unsigned long
+_Unwind_GetBSP (struct _Unwind_Context *context)
+{
+#ifdef UNW_TARGET_IA64
+  unw_word_t val;
+
+  unw_get_reg (&context->cursor, UNW_IA64_BSP, &val);
+  return val;
+#else
+  return 0;
+#endif
+}
+
+unsigned long __libunwind_Unwind_GetBSP (struct _Unwind_Context *)
+     ALIAS (_Unwind_GetBSP);
diff --git a/src/third_party/unwind/dist/src/unwind/GetCFA.c b/src/third_party/unwind/dist/src/unwind/GetCFA.c
new file mode 100644
index 00000000000..5ca63903dda
--- /dev/null
+++ b/src/third_party/unwind/dist/src/unwind/GetCFA.c
@@ -0,0 +1,38 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind-internal.h"
+
+unsigned long
+_Unwind_GetCFA (struct _Unwind_Context *context)
+{
+  unw_word_t val;
+
+  unw_get_reg (&context->cursor, UNW_REG_SP, &val);
+  return val;
+}
+
+unsigned long __libunwind_Unwind_GetCFA (struct _Unwind_Context *)
+     ALIAS (_Unwind_GetCFA);
diff --git a/src/third_party/unwind/dist/src/unwind/GetDataRelBase.c b/src/third_party/unwind/dist/src/unwind/GetDataRelBase.c
new file mode 100644
index 00000000000..8e6914f4f35
--- /dev/null
+++ b/src/third_party/unwind/dist/src/unwind/GetDataRelBase.c
@@ -0,0 +1,39 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind-internal.h"
+
+unsigned long
+_Unwind_GetDataRelBase (struct _Unwind_Context *context)
+{
+  unw_proc_info_t pi;
+
+  pi.gp = 0;
+  unw_get_proc_info (&context->cursor, &pi);
+  return pi.gp;
+}
+
+unsigned long __libunwind_Unwind_GetDataRelBase (struct _Unwind_Context *)
+     ALIAS (_Unwind_GetDataRelBase);
diff --git a/src/third_party/unwind/dist/src/unwind/GetGR.c b/src/third_party/unwind/dist/src/unwind/GetGR.c
new file mode 100644
index 00000000000..fa709434353
--- /dev/null
+++ b/src/third_party/unwind/dist/src/unwind/GetGR.c
@@ -0,0 +1,43 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind-internal.h"
+
+unsigned long
+_Unwind_GetGR (struct _Unwind_Context *context, int index)
+{
+  unw_word_t val;
+
+  if (index == UNW_REG_SP && context->end_of_stack)
+    /* _Unwind_ForcedUnwind() requires us to return a NULL
+       stack-pointer after reaching the end of the stack.  */
+    return 0;
+
+  unw_get_reg (&context->cursor, index, &val);
+  return val;
+}
+
+unsigned long __libunwind_Unwind_GetGR (struct _Unwind_Context *, int)
+     ALIAS (_Unwind_GetGR);
diff --git a/src/third_party/unwind/dist/src/unwind/GetIP.c b/src/third_party/unwind/dist/src/unwind/GetIP.c
new file mode 100644
index 00000000000..e9fc4944025
--- /dev/null
+++ b/src/third_party/unwind/dist/src/unwind/GetIP.c
@@ -0,0 +1,38 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind-internal.h"
+
+unsigned long
+_Unwind_GetIP (struct _Unwind_Context *context)
+{
+  unw_word_t val;
+
+  unw_get_reg (&context->cursor, UNW_REG_IP, &val);
+  return val;
+}
+
+unsigned long __libunwind_Unwind_GetIP (struct _Unwind_Context *)
+     ALIAS (_Unwind_GetIP);
diff --git a/src/third_party/unwind/dist/src/unwind/GetIPInfo.c b/src/third_party/unwind/dist/src/unwind/GetIPInfo.c
new file mode 100644
index 00000000000..e8ee7fd7f1b
--- /dev/null
+++ b/src/third_party/unwind/dist/src/unwind/GetIPInfo.c
@@ -0,0 +1,42 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2009 Red Hat
+        Contributed by Jan Kratochvil <jan.kratochvil@redhat.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind-internal.h"
+
+/* gcc/unwind-dw2.c: Retrieve the return address and flag whether that IP is
+   before or after first not yet fully executed instruction.  */
+
+unsigned long
+_Unwind_GetIPInfo (struct _Unwind_Context *context, int *ip_before_insn)
+{
+  unw_word_t val;
+
+  unw_get_reg (&context->cursor, UNW_REG_IP, &val);
+  *ip_before_insn = unw_is_signal_frame (&context->cursor);
+  return val;
+}
+
+unsigned long __libunwind_Unwind_GetIPInfo (struct _Unwind_Context *, int *)
+     ALIAS (_Unwind_GetIPInfo);
diff --git a/src/third_party/unwind/dist/src/unwind/GetLanguageSpecificData.c b/src/third_party/unwind/dist/src/unwind/GetLanguageSpecificData.c
new file mode 100644
index 00000000000..e7ca9b453c3
--- /dev/null
+++ b/src/third_party/unwind/dist/src/unwind/GetLanguageSpecificData.c
@@ -0,0 +1,40 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind-internal.h"
+
+unsigned long
+_Unwind_GetLanguageSpecificData (struct _Unwind_Context *context)
+{
+  unw_proc_info_t pi;
+
+  pi.lsda = 0;
+  unw_get_proc_info (&context->cursor, &pi);
+  return pi.lsda;
+}
+
+unsigned long
+__libunwind_Unwind_GetLanguageSpecificData (struct _Unwind_Context *)
+     ALIAS (_Unwind_GetLanguageSpecificData);
diff --git a/src/third_party/unwind/dist/src/unwind/GetRegionStart.c b/src/third_party/unwind/dist/src/unwind/GetRegionStart.c
new file mode 100644
index 00000000000..f4995813fac
--- /dev/null
+++ b/src/third_party/unwind/dist/src/unwind/GetRegionStart.c
@@ -0,0 +1,39 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind-internal.h"
+
+unsigned long
+_Unwind_GetRegionStart (struct _Unwind_Context *context)
+{
+  unw_proc_info_t pi;
+
+  pi.start_ip = 0;
+  unw_get_proc_info (&context->cursor, &pi);
+  return pi.start_ip;
+}
+
+unsigned long __libunwind_Unwind_GetRegionStart (struct _Unwind_Context *)
+     ALIAS (_Unwind_GetRegionStart);
diff --git a/src/third_party/unwind/dist/src/unwind/GetTextRelBase.c b/src/third_party/unwind/dist/src/unwind/GetTextRelBase.c
new file mode 100644
index 00000000000..ce65ae93e77
--- /dev/null
+++ b/src/third_party/unwind/dist/src/unwind/GetTextRelBase.c
@@ -0,0 +1,35 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind-internal.h"
+
+unsigned long
+_Unwind_GetTextRelBase (struct _Unwind_Context *context)
+{
+  return 0;
+}
+
+unsigned long __libunwind_Unwind_GetTextRelBase (struct _Unwind_Context *)
+     ALIAS (_Unwind_GetTextRelBase);
diff --git a/src/third_party/unwind/dist/src/unwind/RaiseException.c b/src/third_party/unwind/dist/src/unwind/RaiseException.c
new file mode 100644
index 00000000000..3c3ca19e989
--- /dev/null
+++ b/src/third_party/unwind/dist/src/unwind/RaiseException.c
@@ -0,0 +1,103 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind-internal.h"
+
+_Unwind_Reason_Code
+_Unwind_RaiseException (struct _Unwind_Exception *exception_object)
+{
+  uint64_t exception_class = exception_object->exception_class;
+  _Unwind_Personality_Fn personality;
+  struct _Unwind_Context context;
+  _Unwind_Reason_Code reason;
+  unw_proc_info_t pi;
+  unw_context_t uc;
+  unw_word_t ip;
+  int ret;
+
+  Debug (1, "(exception_object=%p)\n", exception_object);
+
+  if (_Unwind_InitContext (&context, &uc) < 0)
+    return _URC_FATAL_PHASE1_ERROR;
+
+  /* Phase 1 (search phase) */
+
+  while (1)
+    {
+      if ((ret = unw_step (&context.cursor)) <= 0)
+        {
+          if (ret == 0)
+            {
+              Debug (1, "no handler found\n");
+              return _URC_END_OF_STACK;
+            }
+          else
+            return _URC_FATAL_PHASE1_ERROR;
+        }
+
+      if (unw_get_proc_info (&context.cursor, &pi) < 0)
+        return _URC_FATAL_PHASE1_ERROR;
+
+      personality = (_Unwind_Personality_Fn) (uintptr_t) pi.handler;
+      if (personality)
+        {
+          reason = (*personality) (_U_VERSION, _UA_SEARCH_PHASE,
+                                   exception_class, exception_object,
+                                   &context);
+          if (reason != _URC_CONTINUE_UNWIND)
+            {
+              if (reason == _URC_HANDLER_FOUND)
+                break;
+              else
+                {
+                  Debug (1, "personality returned %d\n", reason);
+                  return _URC_FATAL_PHASE1_ERROR;
+                }
+            }
+        }
+    }
+
+  /* Exceptions are associated with IP-ranges.  If a given exception
+     is handled at a particular IP, it will _always_ be handled at
+     that IP.  If this weren't true, we'd have to track the tuple
+     (IP,SP,BSP) to uniquely identify the stack frame that's handling
+     the exception.  */
+  if (unw_get_reg (&context.cursor, UNW_REG_IP, &ip) < 0)
+    return _URC_FATAL_PHASE1_ERROR;
+  exception_object->private_1 = 0;      /* clear "stop" pointer */
+  exception_object->private_2 = ip;     /* save frame marker */
+
+  Debug (1, "found handler for IP=%lx; entering cleanup phase\n", (long) ip);
+
+  /* Reset the cursor to the first frame: */
+  if (unw_init_local (&context.cursor, &uc) < 0)
+    return _URC_FATAL_PHASE1_ERROR;
+
+  return _Unwind_Phase2 (exception_object, &context);
+}
+
+_Unwind_Reason_Code
+__libunwind_Unwind_RaiseException (struct _Unwind_Exception *)
+     ALIAS (_Unwind_RaiseException);
diff --git a/src/third_party/unwind/dist/src/unwind/Resume.c b/src/third_party/unwind/dist/src/unwind/Resume.c
new file mode 100644
index 00000000000..e23d6be27cf
--- /dev/null
+++ b/src/third_party/unwind/dist/src/unwind/Resume.c
@@ -0,0 +1,42 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind-internal.h"
+
+void
+_Unwind_Resume (struct _Unwind_Exception *exception_object)
+{
+  struct _Unwind_Context context;
+  unw_context_t uc;
+
+  if (_Unwind_InitContext (&context, &uc) < 0)
+    abort ();
+
+  _Unwind_Phase2 (exception_object, &context);
+  abort ();
+}
+
+void __libunwind_Unwind_Resume (struct _Unwind_Exception *)
+     ALIAS (_Unwind_Resume);
diff --git a/src/third_party/unwind/dist/src/unwind/Resume_or_Rethrow.c b/src/third_party/unwind/dist/src/unwind/Resume_or_Rethrow.c
new file mode 100644
index 00000000000..9c76443b365
--- /dev/null
+++ b/src/third_party/unwind/dist/src/unwind/Resume_or_Rethrow.c
@@ -0,0 +1,47 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind-internal.h"
+
+_Unwind_Reason_Code
+_Unwind_Resume_or_Rethrow (struct _Unwind_Exception *exception_object)
+{
+  struct _Unwind_Context context;
+  unw_context_t uc;
+
+  if (exception_object->private_1)
+    {
+      if (_Unwind_InitContext (&context, &uc) < 0)
+        return _URC_FATAL_PHASE2_ERROR;
+
+      return _Unwind_Phase2 (exception_object, &context);
+    }
+  else
+    return _Unwind_RaiseException (exception_object);
+}
+
+_Unwind_Reason_Code
+__libunwind_Unwind_Resume_or_Rethrow (struct _Unwind_Exception *)
+     ALIAS (_Unwind_Resume_or_Rethrow);
diff --git a/src/third_party/unwind/dist/src/unwind/SetGR.c b/src/third_party/unwind/dist/src/unwind/SetGR.c
new file mode 100644
index 00000000000..ae77a8e8258
--- /dev/null
+++ b/src/third_party/unwind/dist/src/unwind/SetGR.c
@@ -0,0 +1,47 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind-internal.h"
+#ifdef UNW_TARGET_X86
+#include "dwarf_i.h"
+#endif
+
+void
+_Unwind_SetGR (struct _Unwind_Context *context, int index,
+               unsigned long new_value)
+{
+#ifdef UNW_TARGET_X86
+  index = dwarf_to_unw_regnum(index);
+#endif
+  unw_set_reg (&context->cursor, index, new_value);
+#ifdef UNW_TARGET_IA64
+  if (index >= UNW_IA64_GR && index <= UNW_IA64_GR + 127)
+    /* Clear the NaT bit. */
+    unw_set_reg (&context->cursor, UNW_IA64_NAT + (index - UNW_IA64_GR), 0);
+#endif
+}
+
+void __libunwind_Unwind_SetGR (struct _Unwind_Context *, int, unsigned long)
+     ALIAS (_Unwind_SetGR);
diff --git a/src/third_party/unwind/dist/src/unwind/SetIP.c b/src/third_party/unwind/dist/src/unwind/SetIP.c
new file mode 100644
index 00000000000..fccc2f0dd57
--- /dev/null
+++ b/src/third_party/unwind/dist/src/unwind/SetIP.c
@@ -0,0 +1,35 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind-internal.h"
+
+void
+_Unwind_SetIP (struct _Unwind_Context *context, unsigned long new_value)
+{
+  unw_set_reg (&context->cursor, UNW_REG_IP, new_value);
+}
+
+void __libunwind_Unwind_SetIP (struct _Unwind_Context *, unsigned long)
+     ALIAS (_Unwind_SetIP);
diff --git a/src/third_party/unwind/dist/src/unwind/libunwind.pc.in b/src/third_party/unwind/dist/src/unwind/libunwind.pc.in
new file mode 100644
index 00000000000..1505c5d6f67
--- /dev/null
+++ b/src/third_party/unwind/dist/src/unwind/libunwind.pc.in
@@ -0,0 +1,11 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: libunwind
+Description: libunwind base library
+Version: @VERSION@
+Libs: -L${libdir} -lunwind
+Libs.private: @LIBLZMA@
+Cflags: -I${includedir}
diff --git a/src/third_party/unwind/dist/src/unwind/unwind-internal.h b/src/third_party/unwind/dist/src/unwind/unwind-internal.h
new file mode 100644
index 00000000000..c68fc3c5ed3
--- /dev/null
+++ b/src/third_party/unwind/dist/src/unwind/unwind-internal.h
@@ -0,0 +1,140 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003, 2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef unwind_internal_h
+#define unwind_internal_h
+
+#define UNW_LOCAL_ONLY
+
+#include <unwind.h>
+#include <stdlib.h>
+#include <libunwind.h>
+
+#include "libunwind_i.h"
+
+/* The version of the _Unwind_*() interface implemented by this code.  */
+#define _U_VERSION      1
+
+typedef _Unwind_Reason_Code (*_Unwind_Personality_Fn)
+        (int, _Unwind_Action, uint64_t, struct _Unwind_Exception *,
+         struct _Unwind_Context *);
+
+struct _Unwind_Context {
+  unw_cursor_t cursor;
+  int end_of_stack;     /* set to 1 if the end of stack was reached */
+};
+
+/* This must be a macro because unw_getcontext() must be invoked from
+   the callee, even if optimization (and hence inlining) is turned
+   off.  The macro arguments MUST NOT have any side-effects. */
+#define _Unwind_InitContext(context, uc)                                     \
+  ((context)->end_of_stack = 0,                                              \
+   ((unw_getcontext (uc) < 0 || unw_init_local (&(context)->cursor, uc) < 0) \
+    ? -1 : 0))
+
+static _Unwind_Reason_Code ALWAYS_INLINE
+_Unwind_Phase2 (struct _Unwind_Exception *exception_object,
+                struct _Unwind_Context *context)
+{
+  _Unwind_Stop_Fn stop = (_Unwind_Stop_Fn) exception_object->private_1;
+  uint64_t exception_class = exception_object->exception_class;
+  void *stop_parameter = (void *) exception_object->private_2;
+  _Unwind_Personality_Fn personality;
+  _Unwind_Reason_Code reason;
+  _Unwind_Action actions;
+  unw_proc_info_t pi;
+  unw_word_t ip;
+  int ret;
+
+  actions = _UA_CLEANUP_PHASE;
+  if (stop)
+    actions |= _UA_FORCE_UNWIND;
+
+  while (1)
+    {
+      ret = unw_step (&context->cursor);
+      if (ret <= 0)
+        {
+          if (ret == 0)
+            {
+              actions |= _UA_END_OF_STACK;
+              context->end_of_stack = 1;
+            }
+          else
+            return _URC_FATAL_PHASE2_ERROR;
+        }
+
+      if (stop)
+        {
+          reason = (*stop) (_U_VERSION, actions, exception_class,
+                            exception_object, context, stop_parameter);
+          if (reason != _URC_NO_REASON)
+            /* Stop function may return _URC_FATAL_PHASE2_ERROR if
+               it's unable to handle end-of-stack condition or
+               _URC_FATAL_PHASE2_ERROR if something is wrong.  Not
+               that it matters: the resulting state is indeterminate
+               anyhow so we must return _URC_FATAL_PHASE2_ERROR... */
+            return _URC_FATAL_PHASE2_ERROR;
+        }
+
+      if (context->end_of_stack
+          || unw_get_proc_info (&context->cursor, &pi) < 0)
+        return _URC_FATAL_PHASE2_ERROR;
+
+      personality = (_Unwind_Personality_Fn) (uintptr_t) pi.handler;
+      if (personality)
+        {
+          if (!stop)
+            {
+              if (unw_get_reg (&context->cursor, UNW_REG_IP, &ip) < 0)
+                return _URC_FATAL_PHASE2_ERROR;
+
+              if ((unsigned long) stop_parameter == ip)
+                actions |= _UA_HANDLER_FRAME;
+            }
+
+          reason = (*personality) (_U_VERSION, actions, exception_class,
+                                   exception_object, context);
+          if (reason != _URC_CONTINUE_UNWIND)
+            {
+              if (reason == _URC_INSTALL_CONTEXT)
+                {
+                  /* we may regain control via _Unwind_Resume() */
+                  unw_resume (&context->cursor);
+                  abort ();
+                }
+              else
+                return _URC_FATAL_PHASE2_ERROR;
+            }
+          if (actions & _UA_HANDLER_FRAME)
+            /* The personality routine for the handler-frame changed
+               it's mind; that's a no-no... */
+            abort ();
+        }
+    }
+  return _URC_FATAL_PHASE2_ERROR;       /* shouldn't be reached */
+}
+
+#endif /* unwind_internal_h */
diff --git a/src/third_party/unwind/dist/src/x86/Gapply_reg_state.c b/src/third_party/unwind/dist/src/x86/Gapply_reg_state.c
new file mode 100644
index 00000000000..82f056da67e
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/Gapply_reg_state.c
@@ -0,0 +1,37 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_apply_reg_state (unw_cursor_t *cursor,
+		     void *reg_states_data)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  return dwarf_apply_reg_state (&c->dwarf, (dwarf_reg_state_t *)reg_states_data);
+}
diff --git a/src/third_party/unwind/dist/src/x86/Gcreate_addr_space.c b/src/third_party/unwind/dist/src/x86/Gcreate_addr_space.c
new file mode 100644
index 00000000000..a7e41a58f48
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/Gcreate_addr_space.c
@@ -0,0 +1,58 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <stdlib.h>
+
+#include "unwind_i.h"
+
+#if defined(_LITTLE_ENDIAN) && !defined(__LITTLE_ENDIAN)
+#define __LITTLE_ENDIAN _LITTLE_ENDIAN
+#endif
+
+unw_addr_space_t
+unw_create_addr_space (unw_accessors_t *a, int byte_order)
+{
+#ifdef UNW_LOCAL_ONLY
+  return NULL;
+#else
+  unw_addr_space_t as;
+
+  /*
+   * x86 supports only little-endian.
+   */
+  if (byte_order != 0 && byte_order != __LITTLE_ENDIAN)
+    return NULL;
+
+  as = malloc (sizeof (*as));
+  if (!as)
+    return NULL;
+
+  memset (as, 0, sizeof (*as));
+
+  as->acc = *a;
+
+  return as;
+#endif
+}
diff --git a/src/third_party/unwind/dist/src/x86/Gget_proc_info.c b/src/third_party/unwind/dist/src/x86/Gget_proc_info.c
new file mode 100644
index 00000000000..4dc2cff3660
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/Gget_proc_info.c
@@ -0,0 +1,45 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_get_proc_info (unw_cursor_t *cursor, unw_proc_info_t *pi)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  if (dwarf_make_proc_info (&c->dwarf) < 0)
+    {
+      /* On x86, it's relatively common to be missing DWARF unwind
+         info.  We don't want to fail in that case, because the
+         frame-chain still would let us do a backtrace at least.  */
+      memset (pi, 0, sizeof (*pi));
+      pi->start_ip = c->dwarf.ip;
+      pi->end_ip = c->dwarf.ip + 1;
+      return 0;
+    }
+  *pi = c->dwarf.pi;
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/x86/Gget_save_loc.c b/src/third_party/unwind/dist/src/x86/Gget_save_loc.c
new file mode 100644
index 00000000000..e459382f6d3
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/Gget_save_loc.c
@@ -0,0 +1,133 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_get_save_loc (unw_cursor_t *cursor, int reg, unw_save_loc_t *sloc)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  dwarf_loc_t loc;
+
+  loc = DWARF_NULL_LOC;         /* default to "not saved" */
+
+  switch (reg)
+    {
+    case UNW_X86_EIP: loc = c->dwarf.loc[EIP]; break;
+    case UNW_X86_CFA: break;
+    case UNW_X86_EAX: loc = c->dwarf.loc[EAX]; break;
+    case UNW_X86_ECX: loc = c->dwarf.loc[ECX]; break;
+    case UNW_X86_EDX: loc = c->dwarf.loc[EDX]; break;
+    case UNW_X86_EBX: loc = c->dwarf.loc[EBX]; break;
+    case UNW_X86_ESP: loc = c->dwarf.loc[ESP]; break;
+    case UNW_X86_EBP: loc = c->dwarf.loc[EBP]; break;
+    case UNW_X86_ESI: loc = c->dwarf.loc[ESI]; break;
+    case UNW_X86_EDI: loc = c->dwarf.loc[EDI]; break;
+    case UNW_X86_EFLAGS: loc = c->dwarf.loc[EFLAGS]; break;
+    case UNW_X86_TRAPNO: loc = c->dwarf.loc[TRAPNO]; break;
+    case UNW_X86_ST0: loc = c->dwarf.loc[ST0]; break;
+
+    case UNW_X86_FCW:
+    case UNW_X86_FSW:
+    case UNW_X86_FTW:
+    case UNW_X86_FOP:
+    case UNW_X86_FCS:
+    case UNW_X86_FIP:
+    case UNW_X86_FEA:
+    case UNW_X86_FDS:
+    case UNW_X86_MXCSR:
+    case UNW_X86_GS:
+    case UNW_X86_FS:
+    case UNW_X86_ES:
+    case UNW_X86_DS:
+    case UNW_X86_SS:
+    case UNW_X86_CS:
+    case UNW_X86_TSS:
+    case UNW_X86_LDT:
+      loc = x86_scratch_loc (c, reg);
+      break;
+
+      /* stacked fp registers */
+    case UNW_X86_ST1:
+    case UNW_X86_ST2:
+    case UNW_X86_ST3:
+    case UNW_X86_ST4:
+    case UNW_X86_ST5:
+    case UNW_X86_ST6:
+    case UNW_X86_ST7:
+      /* SSE fp registers */
+    case UNW_X86_XMM0_lo:
+    case UNW_X86_XMM0_hi:
+    case UNW_X86_XMM1_lo:
+    case UNW_X86_XMM1_hi:
+    case UNW_X86_XMM2_lo:
+    case UNW_X86_XMM2_hi:
+    case UNW_X86_XMM3_lo:
+    case UNW_X86_XMM3_hi:
+    case UNW_X86_XMM4_lo:
+    case UNW_X86_XMM4_hi:
+    case UNW_X86_XMM5_lo:
+    case UNW_X86_XMM5_hi:
+    case UNW_X86_XMM6_lo:
+    case UNW_X86_XMM6_hi:
+    case UNW_X86_XMM7_lo:
+    case UNW_X86_XMM7_hi:
+    case UNW_X86_XMM0:
+    case UNW_X86_XMM1:
+    case UNW_X86_XMM2:
+    case UNW_X86_XMM3:
+    case UNW_X86_XMM4:
+    case UNW_X86_XMM5:
+    case UNW_X86_XMM6:
+    case UNW_X86_XMM7:
+      loc = x86_scratch_loc (c, reg);
+      break;
+
+    default:
+      break;
+    }
+
+  memset (sloc, 0, sizeof (*sloc));
+
+  if (DWARF_IS_NULL_LOC (loc))
+    {
+      sloc->type = UNW_SLT_NONE;
+      return 0;
+    }
+
+#if !defined(UNW_LOCAL_ONLY)
+  if (DWARF_IS_REG_LOC (loc))
+    {
+      sloc->type = UNW_SLT_REG;
+      sloc->u.regnum = DWARF_GET_LOC (loc);
+    }
+  else
+#endif
+    {
+      sloc->type = UNW_SLT_MEMORY;
+      sloc->u.addr = DWARF_GET_LOC (loc);
+    }
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/x86/Gglobal.c b/src/third_party/unwind/dist/src/x86/Gglobal.c
new file mode 100644
index 00000000000..132b8249944
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/Gglobal.c
@@ -0,0 +1,67 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2003, 2005 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "dwarf_i.h"
+
+HIDDEN define_lock (x86_lock);
+HIDDEN int tdep_init_done;
+
+/* See comments for svr4_dbx_register_map[] in gcc/config/i386/i386.c.  */
+
+HIDDEN const uint8_t dwarf_to_unw_regnum_map[19] =
+  {
+    UNW_X86_EAX, UNW_X86_ECX, UNW_X86_EDX, UNW_X86_EBX,
+    UNW_X86_ESP, UNW_X86_EBP, UNW_X86_ESI, UNW_X86_EDI,
+    UNW_X86_EIP, UNW_X86_EFLAGS, UNW_X86_TRAPNO,
+    UNW_X86_ST0, UNW_X86_ST1, UNW_X86_ST2, UNW_X86_ST3,
+    UNW_X86_ST4, UNW_X86_ST5, UNW_X86_ST6, UNW_X86_ST7
+  };
+
+HIDDEN void
+tdep_init (void)
+{
+  intrmask_t saved_mask;
+
+  sigfillset (&unwi_full_mask);
+
+  lock_acquire (&x86_lock, saved_mask);
+  {
+    if (tdep_init_done)
+      /* another thread else beat us to it... */
+      goto out;
+
+    mi_init ();
+
+    dwarf_init ();
+
+#ifndef UNW_REMOTE_ONLY
+    x86_local_addr_space_init ();
+#endif
+    tdep_init_done = 1; /* signal that we're initialized... */
+  }
+ out:
+  lock_release (&x86_lock, saved_mask);
+}
diff --git a/src/third_party/unwind/dist/src/x86/Ginit.c b/src/third_party/unwind/dist/src/x86/Ginit.c
new file mode 100644
index 00000000000..f6b8dc27d49
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/Ginit.c
@@ -0,0 +1,243 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002 Hewlett-Packard Co
+   Copyright (C) 2007 David Mosberger-Tang
+        Contributed by David Mosberger-Tang <dmosberger@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "unwind_i.h"
+
+#ifdef UNW_REMOTE_ONLY
+
+/* unw_local_addr_space is a NULL pointer in this case.  */
+unw_addr_space_t unw_local_addr_space;
+
+#else /* !UNW_REMOTE_ONLY */
+
+static struct unw_addr_space local_addr_space;
+
+unw_addr_space_t unw_local_addr_space = &local_addr_space;
+
+# ifdef UNW_LOCAL_ONLY
+
+HIDDEN void *
+tdep_uc_addr (ucontext_t *uc, int reg)
+{
+  return x86_r_uc_addr (uc, reg);
+}
+
+# endif /* UNW_LOCAL_ONLY */
+
+HIDDEN unw_dyn_info_list_t _U_dyn_info_list;
+
+/* XXX fix me: there is currently no way to locate the dyn-info list
+       by a remote unwinder.  On ia64, this is done via a special
+       unwind-table entry.  Perhaps something similar can be done with
+       DWARF2 unwind info.  */
+
+static void
+put_unwind_info (unw_addr_space_t as, unw_proc_info_t *proc_info, void *arg)
+{
+  /* it's a no-op */
+}
+
+static int
+get_dyn_info_list_addr (unw_addr_space_t as, unw_word_t *dyn_info_list_addr,
+                        void *arg)
+{
+  *dyn_info_list_addr = (unw_word_t) &_U_dyn_info_list;
+  return 0;
+}
+
+#define PAGE_SIZE 4096
+#define PAGE_START(a)   ((a) & ~(PAGE_SIZE-1))
+
+/* Cache of already validated addresses */
+#define NLGA 4
+static unw_word_t last_good_addr[NLGA];
+static int lga_victim;
+
+static int
+validate_mem (unw_word_t addr)
+{
+  int i, victim;
+#ifdef HAVE_MINCORE
+  unsigned char mvec[2]; /* Unaligned access may cross page boundary */
+#endif
+  size_t len;
+
+  if (PAGE_START(addr + sizeof (unw_word_t) - 1) == PAGE_START(addr))
+    len = PAGE_SIZE;
+  else
+    len = PAGE_SIZE * 2;
+
+  addr = PAGE_START(addr);
+
+  if (addr == 0)
+    return -1;
+
+  for (i = 0; i < NLGA; i++)
+    {
+      if (last_good_addr[i] && (addr == last_good_addr[i]))
+        return 0;
+    }
+
+#ifdef HAVE_MINCORE
+  if (mincore ((void *) addr, len, mvec) == -1)
+#else
+  if (msync ((void *) addr, len, MS_ASYNC) == -1)
+#endif
+    return -1;
+
+  victim = lga_victim;
+  for (i = 0; i < NLGA; i++) {
+    if (!last_good_addr[victim]) {
+      last_good_addr[victim++] = addr;
+      return 0;
+    }
+    victim = (victim + 1) % NLGA;
+  }
+
+  /* All slots full. Evict the victim. */
+  last_good_addr[victim] = addr;
+  victim = (victim + 1) % NLGA;
+  lga_victim = victim;
+
+  return 0;
+}
+
+static int
+access_mem (unw_addr_space_t as, unw_word_t addr, unw_word_t *val, int write,
+            void *arg)
+{
+  if (write)
+    {
+      Debug (16, "mem[%x] <- %x\n", addr, *val);
+      *(unw_word_t *) addr = *val;
+    }
+  else
+    {
+      /* validate address */
+      const struct cursor *c = (const struct cursor *)arg;
+      if (c && c->validate && validate_mem(addr))
+        return -1;
+      *val = *(unw_word_t *) addr;
+      Debug (16, "mem[%x] -> %x\n", addr, *val);
+    }
+  return 0;
+}
+
+static int
+access_reg (unw_addr_space_t as, unw_regnum_t reg, unw_word_t *val, int write,
+            void *arg)
+{
+  unw_word_t *addr;
+  ucontext_t *uc = ((struct cursor *)arg)->uc;
+
+  if (unw_is_fpreg (reg))
+    goto badreg;
+
+  if (!(addr = x86_r_uc_addr (uc, reg)))
+    goto badreg;
+
+  if (write)
+    {
+      *(unw_word_t *) addr = *val;
+      Debug (12, "%s <- %x\n", unw_regname (reg), *val);
+    }
+  else
+    {
+      *val = *(unw_word_t *) addr;
+      Debug (12, "%s -> %x\n", unw_regname (reg), *val);
+    }
+  return 0;
+
+ badreg:
+  Debug (1, "bad register number %u\n", reg);
+  return -UNW_EBADREG;
+}
+
+static int
+access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val,
+              int write, void *arg)
+{
+  ucontext_t *uc = ((struct cursor *)arg)->uc;
+  unw_fpreg_t *addr;
+
+  if (!unw_is_fpreg (reg))
+    goto badreg;
+
+  if (!(addr = x86_r_uc_addr (uc, reg)))
+    goto badreg;
+
+  if (write)
+    {
+      Debug (12, "%s <- %08lx.%08lx.%08lx\n", unw_regname (reg),
+             ((long *)val)[0], ((long *)val)[1], ((long *)val)[2]);
+      *(unw_fpreg_t *) addr = *val;
+    }
+  else
+    {
+      *val = *(unw_fpreg_t *) addr;
+      Debug (12, "%s -> %08lx.%08lx.%08lx\n", unw_regname (reg),
+             ((long *)val)[0], ((long *)val)[1], ((long *)val)[2]);
+    }
+  return 0;
+
+ badreg:
+  Debug (1, "bad register number %u\n", reg);
+  /* attempt to access a non-preserved register */
+  return -UNW_EBADREG;
+}
+
+static int
+get_static_proc_name (unw_addr_space_t as, unw_word_t ip,
+                      char *buf, size_t buf_len, unw_word_t *offp,
+                      void *arg)
+{
+  return _Uelf32_get_proc_name (as, getpid (), ip, buf, buf_len, offp);
+}
+
+HIDDEN void
+x86_local_addr_space_init (void)
+{
+  memset (&local_addr_space, 0, sizeof (local_addr_space));
+  local_addr_space.caching_policy = UNWI_DEFAULT_CACHING_POLICY;
+  local_addr_space.acc.find_proc_info = dwarf_find_proc_info;
+  local_addr_space.acc.put_unwind_info = put_unwind_info;
+  local_addr_space.acc.get_dyn_info_list_addr = get_dyn_info_list_addr;
+  local_addr_space.acc.access_mem = access_mem;
+  local_addr_space.acc.access_reg = access_reg;
+  local_addr_space.acc.access_fpreg = access_fpreg;
+  local_addr_space.acc.resume = x86_local_resume;
+  local_addr_space.acc.get_proc_name = get_static_proc_name;
+  unw_flush_cache (&local_addr_space, 0, 0);
+}
+
+#endif /* !UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/dist/src/x86/Ginit_local.c b/src/third_party/unwind/dist/src/x86/Ginit_local.c
new file mode 100644
index 00000000000..bff068704de
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/Ginit_local.c
@@ -0,0 +1,79 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "init.h"
+
+#ifdef UNW_REMOTE_ONLY
+
+int
+unw_init_local (unw_cursor_t *cursor, ucontext_t *uc)
+{
+  return -UNW_EINVAL;
+}
+
+#else /* !UNW_REMOTE_ONLY */
+
+static int
+unw_init_local_common(unw_cursor_t *cursor, ucontext_t *uc, unsigned use_prev_instr)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  if (!tdep_init_done)
+    tdep_init ();
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  c->dwarf.as = unw_local_addr_space;
+  c->dwarf.as_arg = c;
+  c->uc = uc;
+  c->validate = 0;
+  return common_init (c, use_prev_instr);
+}
+
+int
+unw_init_local (unw_cursor_t *cursor, ucontext_t *uc)
+{
+  return unw_init_local_common(cursor, uc, 1);
+}
+
+int
+unw_init_local2 (unw_cursor_t *cursor, ucontext_t *uc, int flag)
+{
+  if (!flag)
+    {
+      return unw_init_local_common(cursor, uc, 1);
+    }
+  else if (flag == UNW_INIT_SIGNAL_FRAME)
+    {
+      return unw_init_local_common(cursor, uc, 0);
+    }
+  else
+    {
+      return -UNW_EINVAL;
+    }
+}
+
+#endif /* !UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/dist/src/x86/Ginit_remote.c b/src/third_party/unwind/dist/src/x86/Ginit_remote.c
new file mode 100644
index 00000000000..7c15096e4f7
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/Ginit_remote.c
@@ -0,0 +1,56 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "init.h"
+#include "unwind_i.h"
+
+int
+unw_init_remote (unw_cursor_t *cursor, unw_addr_space_t as, void *as_arg)
+{
+#ifdef UNW_LOCAL_ONLY
+  return -UNW_EINVAL;
+#else /* !UNW_LOCAL_ONLY */
+  struct cursor *c = (struct cursor *) cursor;
+
+  if (!tdep_init_done)
+    tdep_init ();
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  c->dwarf.as = as;
+  c->dwarf.as_arg = as_arg;
+  if (as == unw_local_addr_space)
+    {
+      c->dwarf.as_arg = c;
+      c->uc = as_arg;
+    }
+  else
+    {
+      c->dwarf.as_arg = as_arg;
+      c->uc = 0;
+    }
+  return common_init (c, 0);
+#endif /* !UNW_LOCAL_ONLY */
+}
diff --git a/src/third_party/unwind/dist/src/x86/Gos-freebsd.c b/src/third_party/unwind/dist/src/x86/Gos-freebsd.c
new file mode 100644
index 00000000000..7dd01404638
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/Gos-freebsd.c
@@ -0,0 +1,374 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2010 Konstantin Belousov <kib@freebsd.org>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <sys/types.h>
+#include <signal.h>
+#include <stddef.h>
+#include <ucontext.h>
+#include <machine/sigframe.h>
+
+#include "unwind_i.h"
+#include "offsets.h"
+
+int
+unw_is_signal_frame (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  unw_word_t w0, w1, w2, w3, w4, w5, ip;
+  unw_addr_space_t as;
+  unw_accessors_t *a;
+  void *arg;
+  int ret;
+
+  as = c->dwarf.as;
+  a = unw_get_accessors_int (as);
+  arg = c->dwarf.as_arg;
+
+  /* Check if EIP points at sigreturn() sequence.  It can be:
+sigcode+4: from amd64 freebsd32 environment
+8d 44 24 20             lea    0x20(%esp),%eax
+50                      push   %eax
+b8 a1 01 00 00          mov    $0x1a1,%eax
+50                      push   %eax
+cd 80                   int    $0x80
+
+sigcode+4: from real i386
+8d 44 24 20             lea    0x20(%esp),%eax
+50                      push   %eax
+f7 40 54 00 02 00       testl  $0x20000,0x54(%eax)
+75 03                   jne    sigcode+21
+8e 68 14                mov    0x14(%eax),%gs
+b8 a1 01 00 00          mov    $0x1a1,%eax
+50                      push   %eax
+cd 80                   int    $0x80
+
+freebsd4_sigcode+4:
+XXX
+osigcode:
+XXX
+  */
+  ip = c->dwarf.ip;
+  ret = X86_SCF_NONE;
+  c->sigcontext_format = ret;
+  if ((*a->access_mem) (as, ip, &w0, 0, arg) < 0 ||
+      (*a->access_mem) (as, ip + 4, &w1, 0, arg) < 0 ||
+      (*a->access_mem) (as, ip + 8, &w2, 0, arg) < 0 ||
+      (*a->access_mem) (as, ip + 12, &w3, 0, arg) < 0)
+    return ret;
+  if (w0 == 0x2024448d && w1 == 0x01a1b850 && w2 == 0xcd500000 &&
+      (w3 & 0xff) == 0x80)
+    ret = X86_SCF_FREEBSD_SIGFRAME;
+  else {
+    if ((*a->access_mem) (as, ip + 16, &w4, 0, arg) < 0 ||
+        (*a->access_mem) (as, ip + 20, &w5, 0, arg) < 0)
+      return ret;
+    if (w0 == 0x2024448d && w1 == 0x5440f750 && w2 == 0x75000200 &&
+        w3 == 0x14688e03 && w4 == 0x0001a1b8 && w5 == 0x80cd5000)
+      ret = X86_SCF_FREEBSD_SIGFRAME;
+  }
+
+  /* Check for syscall */
+  if (ret == X86_SCF_NONE && (*a->access_mem) (as, ip - 2, &w0, 0, arg) >= 0 &&
+      (w0 & 0xffff) == 0x80cd)
+    ret = X86_SCF_FREEBSD_SYSCALL;
+  Debug (16, "returning %d\n", ret);
+  c->sigcontext_format = ret;
+  return (ret);
+}
+
+HIDDEN int
+x86_handle_signal_frame (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  int ret;
+
+  if (c->sigcontext_format == X86_SCF_FREEBSD_SIGFRAME) {
+    struct sigframe *sf;
+    uintptr_t uc_addr;
+    struct dwarf_loc esp_loc;
+
+    sf = (struct sigframe *)c->dwarf.cfa;
+    uc_addr = (uintptr_t)&(sf->sf_uc);
+    c->sigcontext_addr = c->dwarf.cfa;
+
+    esp_loc = DWARF_LOC (uc_addr + FREEBSD_UC_MCONTEXT_ESP_OFF, 0);
+    ret = dwarf_get (&c->dwarf, esp_loc, &c->dwarf.cfa);
+    if (ret < 0)
+    {
+            Debug (2, "returning 0\n");
+            return 0;
+    }
+
+    c->dwarf.loc[EIP] = DWARF_LOC (uc_addr + FREEBSD_UC_MCONTEXT_EIP_OFF, 0);
+    c->dwarf.loc[ESP] = DWARF_LOC (uc_addr + FREEBSD_UC_MCONTEXT_ESP_OFF, 0);
+    c->dwarf.loc[EAX] = DWARF_LOC (uc_addr + FREEBSD_UC_MCONTEXT_EAX_OFF, 0);
+    c->dwarf.loc[ECX] = DWARF_LOC (uc_addr + FREEBSD_UC_MCONTEXT_ECX_OFF, 0);
+    c->dwarf.loc[EDX] = DWARF_LOC (uc_addr + FREEBSD_UC_MCONTEXT_EDX_OFF, 0);
+    c->dwarf.loc[EBX] = DWARF_LOC (uc_addr + FREEBSD_UC_MCONTEXT_EBX_OFF, 0);
+    c->dwarf.loc[EBP] = DWARF_LOC (uc_addr + FREEBSD_UC_MCONTEXT_EBP_OFF, 0);
+    c->dwarf.loc[ESI] = DWARF_LOC (uc_addr + FREEBSD_UC_MCONTEXT_ESI_OFF, 0);
+    c->dwarf.loc[EDI] = DWARF_LOC (uc_addr + FREEBSD_UC_MCONTEXT_EDI_OFF, 0);
+    c->dwarf.loc[EFLAGS] = DWARF_LOC (uc_addr + FREEBSD_UC_MCONTEXT_EFLAGS_OFF, 0);
+    c->dwarf.loc[TRAPNO] = DWARF_LOC (uc_addr + FREEBSD_UC_MCONTEXT_TRAPNO_OFF, 0);
+    c->dwarf.loc[ST0] = DWARF_NULL_LOC;
+  } else if (c->sigcontext_format == X86_SCF_FREEBSD_SYSCALL) {
+    c->dwarf.loc[EIP] = DWARF_LOC (c->dwarf.cfa, 0);
+    c->dwarf.loc[EAX] = DWARF_NULL_LOC;
+    c->dwarf.cfa += 4;
+    c->dwarf.use_prev_instr = 1;
+  } else {
+    Debug (8, "Gstep: not handling frame format %d\n", c->sigcontext_format);
+    abort();
+  }
+  return 0;
+}
+
+HIDDEN dwarf_loc_t
+x86_get_scratch_loc (struct cursor *c, unw_regnum_t reg)
+{
+  unw_word_t addr = c->sigcontext_addr, off, xmm_off;
+  unw_word_t fpstate, fpformat;
+  int ret, is_fpstate = 0, is_xmmstate = 0;
+
+  switch (c->sigcontext_format)
+    {
+    case X86_SCF_NONE:
+      return DWARF_REG_LOC (&c->dwarf, reg);
+
+    case X86_SCF_FREEBSD_SIGFRAME:
+      addr += offsetof(struct sigframe, sf_uc) + FREEBSD_UC_MCONTEXT_OFF;
+      break;
+
+    case X86_SCF_FREEBSD_SIGFRAME4:
+      abort();
+      break;
+
+    case X86_SCF_FREEBSD_OSIGFRAME:
+      /* XXXKIB */
+      abort();
+      break;
+
+    case X86_SCF_FREEBSD_SYSCALL:
+      /* XXXKIB */
+      abort();
+      break;
+
+    default:
+      /* XXXKIB */
+      abort();
+      break;
+    }
+
+  off = 0; /* shut gcc warning */
+  switch (reg)
+    {
+    case UNW_X86_GS: off = FREEBSD_UC_MCONTEXT_GS_OFF; break;
+    case UNW_X86_FS: off = FREEBSD_UC_MCONTEXT_FS_OFF; break;
+    case UNW_X86_ES: off = FREEBSD_UC_MCONTEXT_ES_OFF; break;
+    case UNW_X86_DS: off = FREEBSD_UC_MCONTEXT_SS_OFF; break;
+    case UNW_X86_EDI: off = FREEBSD_UC_MCONTEXT_EDI_OFF; break;
+    case UNW_X86_ESI: off = FREEBSD_UC_MCONTEXT_ESI_OFF; break;
+    case UNW_X86_EBP: off = FREEBSD_UC_MCONTEXT_EBP_OFF; break;
+    case UNW_X86_ESP: off = FREEBSD_UC_MCONTEXT_ESP_OFF; break;
+    case UNW_X86_EBX: off = FREEBSD_UC_MCONTEXT_EBX_OFF; break;
+    case UNW_X86_EDX: off = FREEBSD_UC_MCONTEXT_EDX_OFF; break;
+    case UNW_X86_ECX: off = FREEBSD_UC_MCONTEXT_ECX_OFF; break;
+    case UNW_X86_EAX: off = FREEBSD_UC_MCONTEXT_EAX_OFF; break;
+    case UNW_X86_TRAPNO: off = FREEBSD_UC_MCONTEXT_TRAPNO_OFF; break;
+    case UNW_X86_EIP: off = FREEBSD_UC_MCONTEXT_EIP_OFF; break;
+    case UNW_X86_CS: off = FREEBSD_UC_MCONTEXT_CS_OFF; break;
+    case UNW_X86_EFLAGS: off = FREEBSD_UC_MCONTEXT_EFLAGS_OFF; break;
+    case UNW_X86_SS: off = FREEBSD_UC_MCONTEXT_SS_OFF; break;
+
+    case UNW_X86_FCW:
+      is_fpstate = 1;
+      off = FREEBSD_UC_MCONTEXT_CW_OFF;
+      xmm_off = FREEBSD_UC_MCONTEXT_CW_XMM_OFF;
+      break;
+    case UNW_X86_FSW:
+      is_fpstate = 1;
+      off = FREEBSD_UC_MCONTEXT_SW_OFF;
+      xmm_off = FREEBSD_UC_MCONTEXT_SW_XMM_OFF;
+      break;
+    case UNW_X86_FTW:
+      is_fpstate = 1;
+      xmm_off = FREEBSD_UC_MCONTEXT_TAG_XMM_OFF;
+      off = FREEBSD_UC_MCONTEXT_TAG_OFF;
+      break;
+    case UNW_X86_FCS:
+      is_fpstate = 1;
+      off = FREEBSD_UC_MCONTEXT_CSSEL_OFF;
+      xmm_off = FREEBSD_UC_MCONTEXT_CSSEL_XMM_OFF;
+      break;
+    case UNW_X86_FIP:
+      is_fpstate = 1;
+      off = FREEBSD_UC_MCONTEXT_IPOFF_OFF;
+      xmm_off = FREEBSD_UC_MCONTEXT_IPOFF_XMM_OFF;
+      break;
+    case UNW_X86_FEA:
+      is_fpstate = 1;
+      off = FREEBSD_UC_MCONTEXT_DATAOFF_OFF;
+      xmm_off = FREEBSD_UC_MCONTEXT_DATAOFF_XMM_OFF;
+      break;
+    case UNW_X86_FDS:
+      is_fpstate = 1;
+      off = FREEBSD_US_MCONTEXT_DATASEL_OFF;
+      xmm_off = FREEBSD_US_MCONTEXT_DATASEL_XMM_OFF;
+      break;
+    case UNW_X86_MXCSR:
+      is_fpstate = 1;
+      is_xmmstate = 1;
+      xmm_off = FREEBSD_UC_MCONTEXT_MXCSR_XMM_OFF;
+      break;
+
+      /* stacked fp registers */
+    case UNW_X86_ST0: case UNW_X86_ST1: case UNW_X86_ST2: case UNW_X86_ST3:
+    case UNW_X86_ST4: case UNW_X86_ST5: case UNW_X86_ST6: case UNW_X86_ST7:
+      is_fpstate = 1;
+      off = FREEBSD_UC_MCONTEXT_ST0_OFF + 10*(reg - UNW_X86_ST0);
+      xmm_off = FREEBSD_UC_MCONTEXT_ST0_XMM_OFF + 10*(reg - UNW_X86_ST0);
+      break;
+
+     /* SSE fp registers */
+    case UNW_X86_XMM0_lo: case UNW_X86_XMM0_hi:
+    case UNW_X86_XMM1_lo: case UNW_X86_XMM1_hi:
+    case UNW_X86_XMM2_lo: case UNW_X86_XMM2_hi:
+    case UNW_X86_XMM3_lo: case UNW_X86_XMM3_hi:
+    case UNW_X86_XMM4_lo: case UNW_X86_XMM4_hi:
+    case UNW_X86_XMM5_lo: case UNW_X86_XMM5_hi:
+    case UNW_X86_XMM6_lo: case UNW_X86_XMM6_hi:
+    case UNW_X86_XMM7_lo: case UNW_X86_XMM7_hi:
+      is_fpstate = 1;
+      is_xmmstate = 1;
+      xmm_off = FREEBSD_UC_MCONTEXT_XMM0_OFF + 8*(reg - UNW_X86_XMM0_lo);
+      break;
+    case UNW_X86_XMM0:
+    case UNW_X86_XMM1:
+    case UNW_X86_XMM2:
+    case UNW_X86_XMM3:
+    case UNW_X86_XMM4:
+    case UNW_X86_XMM5:
+    case UNW_X86_XMM6:
+    case UNW_X86_XMM7:
+      is_fpstate = 1;
+      is_xmmstate = 1;
+      xmm_off = FREEBSD_UC_MCONTEXT_XMM0_OFF + 16*(reg - UNW_X86_XMM0);
+      break;
+
+    case UNW_X86_FOP:
+    case UNW_X86_TSS:
+    case UNW_X86_LDT:
+    default:
+      return DWARF_REG_LOC (&c->dwarf, reg);
+    }
+
+  if (is_fpstate)
+    {
+      if ((ret = dwarf_get (&c->dwarf,
+           DWARF_MEM_LOC (&c->dwarf, addr + FREEBSD_UC_MCONTEXT_FPSTATE_OFF),
+           &fpstate)) < 0)
+        return DWARF_NULL_LOC;
+      if (fpstate == FREEBSD_UC_MCONTEXT_FPOWNED_NONE)
+        return DWARF_NULL_LOC;
+      if ((ret = dwarf_get (&c->dwarf,
+           DWARF_MEM_LOC (&c->dwarf, addr + FREEBSD_UC_MCONTEXT_FPFORMAT_OFF),
+           &fpformat)) < 0)
+        return DWARF_NULL_LOC;
+      if (fpformat == FREEBSD_UC_MCONTEXT_FPFMT_NODEV ||
+          (is_xmmstate && fpformat != FREEBSD_UC_MCONTEXT_FPFMT_XMM))
+        return DWARF_NULL_LOC;
+      if (is_xmmstate)
+        off = xmm_off;
+    }
+
+    return DWARF_MEM_LOC (c, addr + off);
+}
+
+#ifndef UNW_REMOTE_ONLY
+HIDDEN void *
+x86_r_uc_addr (ucontext_t *uc, int reg)
+{
+  void *addr;
+
+  switch (reg)
+    {
+    case UNW_X86_GS:  addr = &uc->uc_mcontext.mc_gs; break;
+    case UNW_X86_FS:  addr = &uc->uc_mcontext.mc_fs; break;
+    case UNW_X86_ES:  addr = &uc->uc_mcontext.mc_es; break;
+    case UNW_X86_DS:  addr = &uc->uc_mcontext.mc_ds; break;
+    case UNW_X86_EAX: addr = &uc->uc_mcontext.mc_eax; break;
+    case UNW_X86_EBX: addr = &uc->uc_mcontext.mc_ebx; break;
+    case UNW_X86_ECX: addr = &uc->uc_mcontext.mc_ecx; break;
+    case UNW_X86_EDX: addr = &uc->uc_mcontext.mc_edx; break;
+    case UNW_X86_ESI: addr = &uc->uc_mcontext.mc_esi; break;
+    case UNW_X86_EDI: addr = &uc->uc_mcontext.mc_edi; break;
+    case UNW_X86_EBP: addr = &uc->uc_mcontext.mc_ebp; break;
+    case UNW_X86_EIP: addr = &uc->uc_mcontext.mc_eip; break;
+    case UNW_X86_ESP: addr = &uc->uc_mcontext.mc_esp; break;
+    case UNW_X86_TRAPNO:  addr = &uc->uc_mcontext.mc_trapno; break;
+    case UNW_X86_CS:  addr = &uc->uc_mcontext.mc_cs; break;
+    case UNW_X86_EFLAGS:  addr = &uc->uc_mcontext.mc_eflags; break;
+    case UNW_X86_SS:  addr = &uc->uc_mcontext.mc_ss; break;
+
+    default:
+      addr = NULL;
+    }
+  return addr;
+}
+
+HIDDEN int
+x86_local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  ucontext_t *uc = c->uc;
+
+  /* Ensure c->pi is up-to-date.  On x86, it's relatively common to be
+     missing DWARF unwind info.  We don't want to fail in that case,
+     because the frame-chain still would let us do a backtrace at
+     least.  */
+  dwarf_make_proc_info (&c->dwarf);
+
+  if (c->sigcontext_format == X86_SCF_NONE) {
+      Debug (8, "resuming at ip=%x via setcontext()\n", c->dwarf.ip);
+      setcontext (uc);
+      abort();
+  } else if (c->sigcontext_format == X86_SCF_FREEBSD_SIGFRAME) {
+      struct sigcontext *sc = (struct sigcontext *) c->sigcontext_addr;
+
+      Debug (8, "resuming at ip=%x via sigreturn(%p)\n", c->dwarf.ip, sc);
+      sigreturn((ucontext_t *)((const char *)sc + FREEBSD_SC_UCONTEXT_OFF));
+      abort();
+  } else {
+      Debug (8, "resuming at ip=%x for sigcontext format %d not implemented\n",
+      c->dwarf.ip, c->sigcontext_format);
+      abort();
+  }
+  return -UNW_EINVAL;
+}
+
+#endif
diff --git a/src/third_party/unwind/dist/src/x86/Gos-linux.c b/src/third_party/unwind/dist/src/x86/Gos-linux.c
new file mode 100644
index 00000000000..fb9a5e34612
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/Gos-linux.c
@@ -0,0 +1,331 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "offsets.h"
+
+#include <sys/syscall.h>
+
+int
+unw_is_signal_frame (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  unw_word_t w0, w1, ip;
+  unw_addr_space_t as;
+  unw_accessors_t *a;
+  void *arg;
+  int ret;
+
+  as = c->dwarf.as;
+  a = unw_get_accessors_int (as);
+  arg = c->dwarf.as_arg;
+
+  /* Check if EIP points at sigreturn() sequence.  On Linux, this is:
+
+    __restore:
+        0x58                            pop %eax
+        0xb8 0x77 0x00 0x00 0x00        movl 0x77,%eax
+        0xcd 0x80                       int 0x80
+
+     without SA_SIGINFO, and
+
+    __restore_rt:
+       0xb8 0xad 0x00 0x00 0x00        movl 0xad,%eax
+       0xcd 0x80                       int 0x80
+       0x00
+
+     if SA_SIGINFO is specified.
+  */
+  ip = c->dwarf.ip;
+  if ((*a->access_mem) (as, ip, &w0, 0, arg) < 0
+      || (*a->access_mem) (as, ip + 4, &w1, 0, arg) < 0)
+    ret = 0;
+  else
+    ret = ((w0 == 0x0077b858 && w1 == 0x80cd0000)
+         || (w0 == 0x0000adb8 && (w1 & 0xffffff) == 0x80cd00));
+  Debug (16, "returning %d\n", ret);
+  return ret;
+}
+
+HIDDEN int
+x86_handle_signal_frame (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  int ret;
+
+  /* c->esp points at the arguments to the handler.  Without
+     SA_SIGINFO, the arguments consist of a signal number
+     followed by a struct sigcontext.  With SA_SIGINFO, the
+     arguments consist a signal number, a siginfo *, and a
+     ucontext *. */
+  unw_word_t sc_addr;
+  unw_word_t siginfo_ptr_addr = c->dwarf.cfa + 4;
+  unw_word_t sigcontext_ptr_addr = c->dwarf.cfa + 8;
+  unw_word_t siginfo_ptr, sigcontext_ptr;
+  struct dwarf_loc esp_loc, siginfo_ptr_loc, sigcontext_ptr_loc;
+
+  siginfo_ptr_loc = DWARF_LOC (siginfo_ptr_addr, 0);
+  sigcontext_ptr_loc = DWARF_LOC (sigcontext_ptr_addr, 0);
+  ret = (dwarf_get (&c->dwarf, siginfo_ptr_loc, &siginfo_ptr)
+         | dwarf_get (&c->dwarf, sigcontext_ptr_loc, &sigcontext_ptr));
+  if (ret < 0)
+    {
+      Debug (2, "returning 0\n");
+      return 0;
+    }
+  if (siginfo_ptr < c->dwarf.cfa
+      || siginfo_ptr > c->dwarf.cfa + 256
+      || sigcontext_ptr < c->dwarf.cfa
+      || sigcontext_ptr > c->dwarf.cfa + 256)
+    {
+      /* Not plausible for SA_SIGINFO signal */
+      c->sigcontext_format = X86_SCF_LINUX_SIGFRAME;
+      c->sigcontext_addr = sc_addr = c->dwarf.cfa + 4;
+    }
+  else
+    {
+      /* If SA_SIGINFO were not specified, we actually read
+         various segment pointers instead.  We believe that at
+         least fs and _fsh are always zero for linux, so it is
+         not just unlikely, but impossible that we would end
+         up here. */
+      c->sigcontext_format = X86_SCF_LINUX_RT_SIGFRAME;
+      c->sigcontext_addr = sigcontext_ptr;
+      sc_addr = sigcontext_ptr + LINUX_UC_MCONTEXT_OFF;
+    }
+  esp_loc = DWARF_LOC (sc_addr + LINUX_SC_ESP_OFF, 0);
+  ret = dwarf_get (&c->dwarf, esp_loc, &c->dwarf.cfa);
+  if (ret < 0)
+    {
+      Debug (2, "returning 0\n");
+      return 0;
+    }
+
+  c->dwarf.loc[EAX] = DWARF_LOC (sc_addr + LINUX_SC_EAX_OFF, 0);
+  c->dwarf.loc[ECX] = DWARF_LOC (sc_addr + LINUX_SC_ECX_OFF, 0);
+  c->dwarf.loc[EDX] = DWARF_LOC (sc_addr + LINUX_SC_EDX_OFF, 0);
+  c->dwarf.loc[EBX] = DWARF_LOC (sc_addr + LINUX_SC_EBX_OFF, 0);
+  c->dwarf.loc[EBP] = DWARF_LOC (sc_addr + LINUX_SC_EBP_OFF, 0);
+  c->dwarf.loc[ESI] = DWARF_LOC (sc_addr + LINUX_SC_ESI_OFF, 0);
+  c->dwarf.loc[EDI] = DWARF_LOC (sc_addr + LINUX_SC_EDI_OFF, 0);
+  c->dwarf.loc[EFLAGS] = DWARF_NULL_LOC;
+  c->dwarf.loc[TRAPNO] = DWARF_NULL_LOC;
+  c->dwarf.loc[ST0] = DWARF_NULL_LOC;
+  c->dwarf.loc[EIP] = DWARF_LOC (sc_addr + LINUX_SC_EIP_OFF, 0);
+  c->dwarf.loc[ESP] = DWARF_LOC (sc_addr + LINUX_SC_ESP_OFF, 0);
+
+  return 0;
+}
+
+HIDDEN dwarf_loc_t
+x86_get_scratch_loc (struct cursor *c, unw_regnum_t reg)
+{
+  unw_word_t addr = c->sigcontext_addr, fpstate_addr, off;
+  int ret, is_fpstate = 0;
+
+  switch (c->sigcontext_format)
+    {
+    case X86_SCF_NONE:
+      return DWARF_REG_LOC (&c->dwarf, reg);
+
+    case X86_SCF_LINUX_SIGFRAME:
+      break;
+
+    case X86_SCF_LINUX_RT_SIGFRAME:
+      addr += LINUX_UC_MCONTEXT_OFF;
+      break;
+
+    default:
+      return DWARF_NULL_LOC;
+    }
+
+  switch (reg)
+    {
+    case UNW_X86_GS: off = LINUX_SC_GS_OFF; break;
+    case UNW_X86_FS: off = LINUX_SC_FS_OFF; break;
+    case UNW_X86_ES: off = LINUX_SC_ES_OFF; break;
+    case UNW_X86_DS: off = LINUX_SC_DS_OFF; break;
+    case UNW_X86_EDI: off = LINUX_SC_EDI_OFF; break;
+    case UNW_X86_ESI: off = LINUX_SC_ESI_OFF; break;
+    case UNW_X86_EBP: off = LINUX_SC_EBP_OFF; break;
+    case UNW_X86_ESP: off = LINUX_SC_ESP_OFF; break;
+    case UNW_X86_EBX: off = LINUX_SC_EBX_OFF; break;
+    case UNW_X86_EDX: off = LINUX_SC_EDX_OFF; break;
+    case UNW_X86_ECX: off = LINUX_SC_ECX_OFF; break;
+    case UNW_X86_EAX: off = LINUX_SC_EAX_OFF; break;
+    case UNW_X86_TRAPNO: off = LINUX_SC_TRAPNO_OFF; break;
+    case UNW_X86_EIP: off = LINUX_SC_EIP_OFF; break;
+    case UNW_X86_CS: off = LINUX_SC_CS_OFF; break;
+    case UNW_X86_EFLAGS: off = LINUX_SC_EFLAGS_OFF; break;
+    case UNW_X86_SS: off = LINUX_SC_SS_OFF; break;
+
+      /* The following is probably not correct for all possible cases.
+         Somebody who understands this better should review this for
+         correctness.  */
+
+    case UNW_X86_FCW: is_fpstate = 1; off = LINUX_FPSTATE_CW_OFF; break;
+    case UNW_X86_FSW: is_fpstate = 1; off = LINUX_FPSTATE_SW_OFF; break;
+    case UNW_X86_FTW: is_fpstate = 1; off = LINUX_FPSTATE_TAG_OFF; break;
+    case UNW_X86_FCS: is_fpstate = 1; off = LINUX_FPSTATE_CSSEL_OFF; break;
+    case UNW_X86_FIP: is_fpstate = 1; off = LINUX_FPSTATE_IPOFF_OFF; break;
+    case UNW_X86_FEA: is_fpstate = 1; off = LINUX_FPSTATE_DATAOFF_OFF; break;
+    case UNW_X86_FDS: is_fpstate = 1; off = LINUX_FPSTATE_DATASEL_OFF; break;
+    case UNW_X86_MXCSR: is_fpstate = 1; off = LINUX_FPSTATE_MXCSR_OFF; break;
+
+      /* stacked fp registers */
+    case UNW_X86_ST0: case UNW_X86_ST1: case UNW_X86_ST2: case UNW_X86_ST3:
+    case UNW_X86_ST4: case UNW_X86_ST5: case UNW_X86_ST6: case UNW_X86_ST7:
+      is_fpstate = 1;
+      off = LINUX_FPSTATE_ST0_OFF + 10*(reg - UNW_X86_ST0);
+      break;
+
+     /* SSE fp registers */
+    case UNW_X86_XMM0_lo: case UNW_X86_XMM0_hi:
+    case UNW_X86_XMM1_lo: case UNW_X86_XMM1_hi:
+    case UNW_X86_XMM2_lo: case UNW_X86_XMM2_hi:
+    case UNW_X86_XMM3_lo: case UNW_X86_XMM3_hi:
+    case UNW_X86_XMM4_lo: case UNW_X86_XMM4_hi:
+    case UNW_X86_XMM5_lo: case UNW_X86_XMM5_hi:
+    case UNW_X86_XMM6_lo: case UNW_X86_XMM6_hi:
+    case UNW_X86_XMM7_lo: case UNW_X86_XMM7_hi:
+      is_fpstate = 1;
+      off = LINUX_FPSTATE_XMM0_OFF + 8*(reg - UNW_X86_XMM0_lo);
+      break;
+    case UNW_X86_XMM0:
+    case UNW_X86_XMM1:
+    case UNW_X86_XMM2:
+    case UNW_X86_XMM3:
+    case UNW_X86_XMM4:
+    case UNW_X86_XMM5:
+    case UNW_X86_XMM6:
+    case UNW_X86_XMM7:
+      is_fpstate = 1;
+      off = LINUX_FPSTATE_XMM0_OFF + 16*(reg - UNW_X86_XMM0);
+      break;
+
+    case UNW_X86_FOP:
+    case UNW_X86_TSS:
+    case UNW_X86_LDT:
+    default:
+      return DWARF_REG_LOC (&c->dwarf, reg);
+    }
+
+  if (is_fpstate)
+    {
+      if ((ret = dwarf_get (&c->dwarf,
+                            DWARF_MEM_LOC (&c->dwarf,
+                                           addr + LINUX_SC_FPSTATE_OFF),
+                            &fpstate_addr)) < 0)
+        return DWARF_NULL_LOC;
+
+      if (!fpstate_addr)
+        return DWARF_NULL_LOC;
+
+      return DWARF_MEM_LOC (c, fpstate_addr + off);
+    }
+  else
+    return DWARF_MEM_LOC (c, addr + off);
+}
+
+#ifndef UNW_REMOTE_ONLY
+HIDDEN void *
+x86_r_uc_addr (ucontext_t *uc, int reg)
+{
+  void *addr;
+
+  switch (reg)
+    {
+    case UNW_X86_GS:  addr = &uc->uc_mcontext.gregs[REG_GS]; break;
+    case UNW_X86_FS:  addr = &uc->uc_mcontext.gregs[REG_FS]; break;
+    case UNW_X86_ES:  addr = &uc->uc_mcontext.gregs[REG_ES]; break;
+    case UNW_X86_DS:  addr = &uc->uc_mcontext.gregs[REG_DS]; break;
+    case UNW_X86_EAX: addr = &uc->uc_mcontext.gregs[REG_EAX]; break;
+    case UNW_X86_EBX: addr = &uc->uc_mcontext.gregs[REG_EBX]; break;
+    case UNW_X86_ECX: addr = &uc->uc_mcontext.gregs[REG_ECX]; break;
+    case UNW_X86_EDX: addr = &uc->uc_mcontext.gregs[REG_EDX]; break;
+    case UNW_X86_ESI: addr = &uc->uc_mcontext.gregs[REG_ESI]; break;
+    case UNW_X86_EDI: addr = &uc->uc_mcontext.gregs[REG_EDI]; break;
+    case UNW_X86_EBP: addr = &uc->uc_mcontext.gregs[REG_EBP]; break;
+    case UNW_X86_EIP: addr = &uc->uc_mcontext.gregs[REG_EIP]; break;
+    case UNW_X86_ESP: addr = &uc->uc_mcontext.gregs[REG_ESP]; break;
+    case UNW_X86_TRAPNO:  addr = &uc->uc_mcontext.gregs[REG_TRAPNO]; break;
+    case UNW_X86_CS:  addr = &uc->uc_mcontext.gregs[REG_CS]; break;
+    case UNW_X86_EFLAGS:  addr = &uc->uc_mcontext.gregs[REG_EFL]; break;
+    case UNW_X86_SS:  addr = &uc->uc_mcontext.gregs[REG_SS]; break;
+
+    default:
+      addr = NULL;
+    }
+  return addr;
+}
+
+HIDDEN int
+x86_local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  ucontext_t *uc = c->uc;
+
+  /* Ensure c->pi is up-to-date.  On x86, it's relatively common to be
+     missing DWARF unwind info.  We don't want to fail in that case,
+     because the frame-chain still would let us do a backtrace at
+     least.  */
+  dwarf_make_proc_info (&c->dwarf);
+
+  if (unlikely (c->sigcontext_format != X86_SCF_NONE))
+    {
+      struct sigcontext *sc = (struct sigcontext *) c->sigcontext_addr;
+
+      Debug (8, "resuming at ip=%x via sigreturn(%p)\n", c->dwarf.ip, sc);
+      x86_sigreturn (sc);
+    }
+  else
+    {
+      Debug (8, "resuming at ip=%x via setcontext()\n", c->dwarf.ip);
+      setcontext (uc);
+    }
+  return -UNW_EINVAL;
+}
+
+/* sigreturn() is a no-op on x86 glibc.  */
+HIDDEN void
+x86_sigreturn (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  struct sigcontext *sc = (struct sigcontext *) c->sigcontext_addr;
+  mcontext_t *sc_mcontext = &((ucontext_t*)sc)->uc_mcontext;
+  /* Copy in saved uc - all preserved regs are at the start of sigcontext */
+  memcpy(sc_mcontext, &c->uc->uc_mcontext,
+         DWARF_NUM_PRESERVED_REGS * sizeof(unw_word_t));
+
+  Debug (8, "resuming at ip=%llx via sigreturn(%p)\n",
+             (unsigned long long) c->dwarf.ip, sc);
+  __asm__ __volatile__ ("mov %0, %%esp;"
+                        "mov %1, %%eax;"
+                        "syscall"
+                        :: "r"(sc), "i"(SYS_rt_sigreturn)
+                        : "memory");
+  abort();
+}
+#endif
diff --git a/src/third_party/unwind/dist/src/x86/Greg_states_iterate.c b/src/third_party/unwind/dist/src/x86/Greg_states_iterate.c
new file mode 100644
index 00000000000..a17dc1b561d
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/Greg_states_iterate.c
@@ -0,0 +1,37 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_reg_states_iterate (unw_cursor_t *cursor,
+			unw_reg_states_callback cb, void *token)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  return dwarf_reg_states_iterate (&c->dwarf, cb, token);
+}
diff --git a/src/third_party/unwind/dist/src/x86/Gregs.c b/src/third_party/unwind/dist/src/x86/Gregs.c
new file mode 100644
index 00000000000..4a9592617d0
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/Gregs.c
@@ -0,0 +1,178 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2004 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "offsets.h"
+#include "unwind_i.h"
+
+HIDDEN dwarf_loc_t
+x86_scratch_loc (struct cursor *c, unw_regnum_t reg)
+{
+  if (c->sigcontext_addr)
+    return x86_get_scratch_loc (c, reg);
+  else
+    return DWARF_REG_LOC (&c->dwarf, reg);
+}
+
+HIDDEN int
+tdep_access_reg (struct cursor *c, unw_regnum_t reg, unw_word_t *valp,
+                 int write)
+{
+  dwarf_loc_t loc = DWARF_NULL_LOC;
+  unsigned int mask;
+  int arg_num;
+
+  switch (reg)
+    {
+
+    case UNW_X86_EIP:
+      if (write)
+        c->dwarf.ip = *valp;            /* also update the EIP cache */
+      loc = c->dwarf.loc[EIP];
+      break;
+
+    case UNW_X86_CFA:
+    case UNW_X86_ESP:
+      if (write)
+        return -UNW_EREADONLYREG;
+      *valp = c->dwarf.cfa;
+      return 0;
+
+    case UNW_X86_EAX:
+    case UNW_X86_EDX:
+      arg_num = reg - UNW_X86_EAX;
+      mask = (1 << arg_num);
+      if (write)
+        {
+          c->dwarf.eh_args[arg_num] = *valp;
+          c->dwarf.eh_valid_mask |= mask;
+          return 0;
+        }
+      else if ((c->dwarf.eh_valid_mask & mask) != 0)
+        {
+          *valp = c->dwarf.eh_args[arg_num];
+          return 0;
+        }
+      else
+        loc = c->dwarf.loc[(reg == UNW_X86_EAX) ? EAX : EDX];
+      break;
+
+    case UNW_X86_ECX: loc = c->dwarf.loc[ECX]; break;
+    case UNW_X86_EBX: loc = c->dwarf.loc[EBX]; break;
+
+    case UNW_X86_EBP: loc = c->dwarf.loc[EBP]; break;
+    case UNW_X86_ESI: loc = c->dwarf.loc[ESI]; break;
+    case UNW_X86_EDI: loc = c->dwarf.loc[EDI]; break;
+    case UNW_X86_EFLAGS: loc = c->dwarf.loc[EFLAGS]; break;
+    case UNW_X86_TRAPNO: loc = c->dwarf.loc[TRAPNO]; break;
+
+    case UNW_X86_FCW:
+    case UNW_X86_FSW:
+    case UNW_X86_FTW:
+    case UNW_X86_FOP:
+    case UNW_X86_FCS:
+    case UNW_X86_FIP:
+    case UNW_X86_FEA:
+    case UNW_X86_FDS:
+    case UNW_X86_MXCSR:
+    case UNW_X86_GS:
+    case UNW_X86_FS:
+    case UNW_X86_ES:
+    case UNW_X86_DS:
+    case UNW_X86_SS:
+    case UNW_X86_CS:
+    case UNW_X86_TSS:
+    case UNW_X86_LDT:
+      loc = x86_scratch_loc (c, reg);
+      break;
+
+    default:
+      Debug (1, "bad register number %u\n", reg);
+      return -UNW_EBADREG;
+    }
+
+  if (write)
+    return dwarf_put (&c->dwarf, loc, *valp);
+  else
+    return dwarf_get (&c->dwarf, loc, valp);
+}
+
+HIDDEN int
+tdep_access_fpreg (struct cursor *c, unw_regnum_t reg, unw_fpreg_t *valp,
+                   int write)
+{
+  struct dwarf_loc loc = DWARF_NULL_LOC;
+
+  switch (reg)
+    {
+    case UNW_X86_ST0:
+      loc = c->dwarf.loc[ST0];
+      break;
+
+      /* stacked fp registers */
+    case UNW_X86_ST1:
+    case UNW_X86_ST2:
+    case UNW_X86_ST3:
+    case UNW_X86_ST4:
+    case UNW_X86_ST5:
+    case UNW_X86_ST6:
+    case UNW_X86_ST7:
+      /* SSE fp registers */
+    case UNW_X86_XMM0:
+    case UNW_X86_XMM1:
+    case UNW_X86_XMM2:
+    case UNW_X86_XMM3:
+    case UNW_X86_XMM4:
+    case UNW_X86_XMM5:
+    case UNW_X86_XMM6:
+    case UNW_X86_XMM7:
+    case UNW_X86_XMM0_lo:
+    case UNW_X86_XMM0_hi:
+    case UNW_X86_XMM1_lo:
+    case UNW_X86_XMM1_hi:
+    case UNW_X86_XMM2_lo:
+    case UNW_X86_XMM2_hi:
+    case UNW_X86_XMM3_lo:
+    case UNW_X86_XMM3_hi:
+    case UNW_X86_XMM4_lo:
+    case UNW_X86_XMM4_hi:
+    case UNW_X86_XMM5_lo:
+    case UNW_X86_XMM5_hi:
+    case UNW_X86_XMM6_lo:
+    case UNW_X86_XMM6_hi:
+    case UNW_X86_XMM7_lo:
+    case UNW_X86_XMM7_hi:
+      loc = x86_scratch_loc (c, reg);
+      break;
+
+    default:
+      Debug (1, "bad register number %u\n", reg);
+      return -UNW_EBADREG;
+    }
+
+  if (write)
+    return dwarf_putfp (&c->dwarf, loc, *valp);
+  else
+    return dwarf_getfp (&c->dwarf, loc, valp);
+}
diff --git a/src/third_party/unwind/dist/src/x86/Gresume.c b/src/third_party/unwind/dist/src/x86/Gresume.c
new file mode 100644
index 00000000000..5072c4ba089
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/Gresume.c
@@ -0,0 +1,91 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2004 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <stdlib.h>
+
+#include "unwind_i.h"
+#include "offsets.h"
+
+/* This routine is responsible for copying the register values in
+   cursor C and establishing them as the current machine state. */
+
+static inline int
+establish_machine_state (struct cursor *c)
+{
+  int (*access_reg) (unw_addr_space_t, unw_regnum_t, unw_word_t *,
+                     int write, void *);
+  int (*access_fpreg) (unw_addr_space_t, unw_regnum_t, unw_fpreg_t *,
+                       int write, void *);
+  unw_addr_space_t as = c->dwarf.as;
+  void *arg = c->dwarf.as_arg;
+  unw_fpreg_t fpval;
+  unw_word_t val;
+  int reg;
+
+  access_reg = as->acc.access_reg;
+  access_fpreg = as->acc.access_fpreg;
+
+  Debug (8, "copying out cursor state\n");
+
+  for (reg = 0; reg <= UNW_REG_LAST; ++reg)
+    {
+      Debug (16, "copying %s %d\n", unw_regname (reg), reg);
+      if (unw_is_fpreg (reg))
+        {
+          if (tdep_access_fpreg (c, reg, &fpval, 0) >= 0)
+            (*access_fpreg) (as, reg, &fpval, 1, arg);
+        }
+      else
+        {
+          if (tdep_access_reg (c, reg, &val, 0) >= 0)
+            (*access_reg) (as, reg, &val, 1, arg);
+        }
+    }
+
+  if (c->dwarf.args_size)
+    {
+      if (tdep_access_reg (c, UNW_X86_ESP, &val, 0) >= 0)
+        {
+          val += c->dwarf.args_size;
+          (*access_reg) (as, UNW_X86_ESP, &val, 1, arg);
+        }
+    }
+  return 0;
+}
+
+int
+unw_resume (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  int ret;
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  if ((ret = establish_machine_state (c)) < 0)
+    return ret;
+
+  return (*c->dwarf.as->acc.resume) (c->dwarf.as, (unw_cursor_t *) c,
+                                     c->dwarf.as_arg);
+}
diff --git a/src/third_party/unwind/dist/src/x86/Gstep.c b/src/third_party/unwind/dist/src/x86/Gstep.c
new file mode 100644
index 00000000000..129b739a3e7
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/Gstep.c
@@ -0,0 +1,115 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "offsets.h"
+
+int
+unw_step (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  int ret, i;
+
+  Debug (1, "(cursor=%p, ip=0x%08x)\n", c, (unsigned) c->dwarf.ip);
+
+  /* Try DWARF-based unwinding... */
+  ret = dwarf_step (&c->dwarf);
+
+  if (ret < 0 && ret != -UNW_ENOINFO)
+    {
+      Debug (2, "returning %d\n", ret);
+      return ret;
+    }
+
+  if (unlikely (ret < 0))
+    {
+      /* DWARF failed, let's see if we can follow the frame-chain
+         or skip over the signal trampoline.  */
+      struct dwarf_loc ebp_loc, eip_loc;
+
+      /* We could get here because of missing/bad unwind information.
+         Validate all addresses before dereferencing. */
+      c->validate = 1;
+
+      Debug (13, "dwarf_step() failed (ret=%d), trying frame-chain\n", ret);
+
+      if (unw_is_signal_frame (cursor) > 0)
+        {
+          ret = x86_handle_signal_frame(cursor);
+          if (ret < 0)
+            {
+              Debug (2, "returning 0\n");
+              return 0;
+            }
+        }
+      else
+        {
+          ret = dwarf_get (&c->dwarf, c->dwarf.loc[EBP], &c->dwarf.cfa);
+          if (ret < 0)
+            {
+              Debug (2, "returning %d\n", ret);
+              return ret;
+            }
+
+          Debug (13, "[EBP=0x%x] = 0x%x\n", DWARF_GET_LOC (c->dwarf.loc[EBP]),
+                 c->dwarf.cfa);
+
+          ebp_loc = DWARF_LOC (c->dwarf.cfa, 0);
+          eip_loc = DWARF_LOC (c->dwarf.cfa + 4, 0);
+          c->dwarf.cfa += 8;
+
+          /* Mark all registers unsaved, since we don't know where
+             they are saved (if at all), except for the EBP and
+             EIP.  */
+          for (i = 0; i < DWARF_NUM_PRESERVED_REGS; ++i)
+            c->dwarf.loc[i] = DWARF_NULL_LOC;
+
+          c->dwarf.loc[EBP] = ebp_loc;
+          c->dwarf.loc[EIP] = eip_loc;
+          c->dwarf.use_prev_instr = 1;
+        }
+
+      if (!DWARF_IS_NULL_LOC (c->dwarf.loc[EBP]))
+        {
+          ret = dwarf_get (&c->dwarf, c->dwarf.loc[EIP], &c->dwarf.ip);
+          if (ret < 0)
+            {
+              Debug (13, "dwarf_get([EIP=0x%x]) failed\n", DWARF_GET_LOC (c->dwarf.loc[EIP]));
+              Debug (2, "returning %d\n", ret);
+              return ret;
+            }
+          else
+            {
+              Debug (13, "[EIP=0x%x] = 0x%x\n", DWARF_GET_LOC (c->dwarf.loc[EIP]),
+                c->dwarf.ip);
+            }
+        }
+      else
+        c->dwarf.ip = 0;
+    }
+  ret = (c->dwarf.ip == 0) ? 0 : 1;
+  Debug (2, "returning %d\n", ret);
+  return ret;
+}
diff --git a/src/third_party/unwind/dist/src/x86/Lapply_reg_state.c b/src/third_party/unwind/dist/src/x86/Lapply_reg_state.c
new file mode 100644
index 00000000000..7ebada480e5
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/Lapply_reg_state.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gapply_reg_state.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/x86/Lcreate_addr_space.c b/src/third_party/unwind/dist/src/x86/Lcreate_addr_space.c
new file mode 100644
index 00000000000..0f2dc6be901
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/Lcreate_addr_space.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gcreate_addr_space.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/x86/Lget_proc_info.c b/src/third_party/unwind/dist/src/x86/Lget_proc_info.c
new file mode 100644
index 00000000000..69028b019fc
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/Lget_proc_info.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gget_proc_info.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/x86/Lget_save_loc.c b/src/third_party/unwind/dist/src/x86/Lget_save_loc.c
new file mode 100644
index 00000000000..9ea048a9076
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/Lget_save_loc.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gget_save_loc.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/x86/Lglobal.c b/src/third_party/unwind/dist/src/x86/Lglobal.c
new file mode 100644
index 00000000000..6d7b489e14b
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/Lglobal.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gglobal.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/x86/Linit.c b/src/third_party/unwind/dist/src/x86/Linit.c
new file mode 100644
index 00000000000..e9abfdd46a3
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/Linit.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/x86/Linit_local.c b/src/third_party/unwind/dist/src/x86/Linit_local.c
new file mode 100644
index 00000000000..68a1687e854
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/Linit_local.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit_local.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/x86/Linit_remote.c b/src/third_party/unwind/dist/src/x86/Linit_remote.c
new file mode 100644
index 00000000000..58cb04ab7cd
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/Linit_remote.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit_remote.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/x86/Los-freebsd.c b/src/third_party/unwind/dist/src/x86/Los-freebsd.c
new file mode 100644
index 00000000000..a75a205df19
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/Los-freebsd.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gos-freebsd.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/x86/Los-linux.c b/src/third_party/unwind/dist/src/x86/Los-linux.c
new file mode 100644
index 00000000000..3cc18aabcc3
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/Los-linux.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gos-linux.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/x86/Lreg_states_iterate.c b/src/third_party/unwind/dist/src/x86/Lreg_states_iterate.c
new file mode 100644
index 00000000000..f1eb1e79dcd
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/Lreg_states_iterate.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Greg_states_iterate.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/x86/Lregs.c b/src/third_party/unwind/dist/src/x86/Lregs.c
new file mode 100644
index 00000000000..2c9c75cd7d9
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/Lregs.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gregs.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/x86/Lresume.c b/src/third_party/unwind/dist/src/x86/Lresume.c
new file mode 100644
index 00000000000..41a8cf003de
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/Lresume.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gresume.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/x86/Lstep.c b/src/third_party/unwind/dist/src/x86/Lstep.c
new file mode 100644
index 00000000000..c1ac3c7547f
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/Lstep.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gstep.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/x86/getcontext-freebsd.S b/src/third_party/unwind/dist/src/x86/getcontext-freebsd.S
new file mode 100644
index 00000000000..670eff1ae17
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/getcontext-freebsd.S
@@ -0,0 +1,112 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2010 Konstantin Belousov <kib@freebsd.org>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "offsets.h"
+
+	.global _Ux86_getcontext
+	.type _Ux86_getcontext, @function
+_Ux86_getcontext:
+	.cfi_startproc
+	pushl	%eax
+	.cfi_adjust_cfa_offset 4
+	mov	8(%esp),%eax  /* ucontext_t* */
+	popl	FREEBSD_UC_MCONTEXT_EAX_OFF(%eax)
+	.cfi_adjust_cfa_offset 4
+	movl	%ebx, FREEBSD_UC_MCONTEXT_EBX_OFF(%eax)
+	movl	%ecx, FREEBSD_UC_MCONTEXT_ECX_OFF(%eax)
+	movl	%edx, FREEBSD_UC_MCONTEXT_EDX_OFF(%eax)
+	movl	%edi, FREEBSD_UC_MCONTEXT_EDI_OFF(%eax)
+	movl	%esi, FREEBSD_UC_MCONTEXT_ESI_OFF(%eax)
+	movl	%ebp, FREEBSD_UC_MCONTEXT_EBP_OFF(%eax)
+
+	movl	(%esp), %ecx
+	movl	%ecx, FREEBSD_UC_MCONTEXT_EIP_OFF(%eax)
+
+	leal	4(%esp), %ecx		/* Exclude the return address.  */
+	movl	%ecx, FREEBSD_UC_MCONTEXT_ESP_OFF(%eax)
+
+	xorl	%ecx, %ecx
+	movw	%fs, %cx
+	movl	%ecx, FREEBSD_UC_MCONTEXT_FS_OFF(%eax)
+	movw	%gs, %cx
+	movl	%ecx, FREEBSD_UC_MCONTEXT_GS_OFF(%eax)
+	movw	%ds, %cx
+	movl	%ecx, FREEBSD_UC_MCONTEXT_DS_OFF(%eax)
+	movw	%es, %cx
+	movl	%ecx, FREEBSD_UC_MCONTEXT_ES_OFF(%eax)
+	movw	%ss, %cx
+	movl	%ecx, FREEBSD_UC_MCONTEXT_SS_OFF(%eax)
+	movw	%cs, %cx
+	movl	%ecx, FREEBSD_UC_MCONTEXT_CS_OFF(%eax)
+
+	pushfl
+	.cfi_adjust_cfa_offset 4
+	popl	FREEBSD_UC_MCONTEXT_EFLAGS_OFF(%eax)
+	.cfi_adjust_cfa_offset -4
+
+	movl	$0, FREEBSD_UC_MCONTEXT_TRAPNO_OFF(%eax)
+
+	movl	$FREEBSD_UC_MCONTEXT_FPOWNED_FPU,\
+		FREEBSD_UC_MCONTEXT_OWNEDFP_OFF(%eax)
+	movl	$FREEBSD_UC_MCONTEXT_FPFMT_XMM,\
+		FREEBSD_UC_MCONTEXT_FPFORMAT_OFF(%eax)
+
+       /*
+	* Require CPU with fxsave implemented, and enabled by OS.
+	*
+	* If passed ucontext is not aligned to 16-byte boundary,
+	* save fpu context into temporary aligned location on stack
+	* and then copy.
+	*/
+	leal	FREEBSD_UC_MCONTEXT_FPSTATE_OFF(%eax), %edx
+	testl	$0xf, %edx
+	jne	2f
+	fxsave	(%edx)	/* fast path, passed ucontext save area was aligned */
+1:	movl	$FREEBSD_UC_MCONTEXT_MC_LEN_VAL,\
+		FREEBSD_UC_MCONTEXT_MC_LEN_OFF(%eax)
+
+	xorl	%eax, %eax
+	ret
+
+2:	movl	%edx, %edi	/* not aligned, do the dance */
+	subl	$512 + 16, %esp	/* save area and 16 bytes for alignment */
+	.cfi_adjust_cfa_offset 512 + 16
+	movl	%esp, %edx
+	orl	$0xf, %edx	/* align *%edx to 16-byte up */
+	incl	%edx
+	fxsave	(%edx)
+	movl	%edx, %esi	/* copy to the final destination */
+	movl	$512/4,%ecx
+	rep; movsl
+	addl	$512 + 16, %esp	/* restore the stack */
+	.cfi_adjust_cfa_offset -512 - 16
+	movl	FREEBSD_UC_MCONTEXT_ESI_OFF(%eax), %esi
+	movl	FREEBSD_UC_MCONTEXT_EDI_OFF(%eax), %edi
+	jmp	1b
+
+	.cfi_endproc
+	.size	_Ux86_getcontext, . - _Ux86_getcontext
+
+	/* We do not need executable stack.  */
+	.section        .note.GNU-stack,"",@progbits
diff --git a/src/third_party/unwind/dist/src/x86/getcontext-linux.S b/src/third_party/unwind/dist/src/x86/getcontext-linux.S
new file mode 100644
index 00000000000..c469dadbac6
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/getcontext-linux.S
@@ -0,0 +1,74 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2009 Google, Inc
+	Contributed by Paul Pluzhnikov <ppluzhnikov@google.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "offsets.h"
+
+/*  int _Ux86_getcontext (ucontext_t *ucp)
+
+  Saves the machine context in UCP necessary for libunwind.
+  Unlike the libc implementation, we don't save the signal mask
+  and hence avoid the cost of a system call per unwind.
+
+*/
+
+	.global _Ux86_getcontext
+	.type _Ux86_getcontext, @function
+_Ux86_getcontext:
+	.cfi_startproc
+	mov	4(%esp),%eax  /* ucontext_t* */
+
+	/* EAX is not preserved. */
+	movl	$0, (LINUX_UC_MCONTEXT_OFF+LINUX_SC_EAX_OFF)(%eax)
+
+	movl	%ebx, (LINUX_UC_MCONTEXT_OFF+LINUX_SC_EBX_OFF)(%eax)
+	movl	%ecx, (LINUX_UC_MCONTEXT_OFF+LINUX_SC_ECX_OFF)(%eax)
+	movl	%edx, (LINUX_UC_MCONTEXT_OFF+LINUX_SC_EDX_OFF)(%eax)
+	movl	%edi, (LINUX_UC_MCONTEXT_OFF+LINUX_SC_EDI_OFF)(%eax)
+	movl	%esi, (LINUX_UC_MCONTEXT_OFF+LINUX_SC_ESI_OFF)(%eax)
+	movl	%ebp, (LINUX_UC_MCONTEXT_OFF+LINUX_SC_EBP_OFF)(%eax)
+
+	movl	(%esp), %ecx
+	movl	%ecx, (LINUX_UC_MCONTEXT_OFF+LINUX_SC_EIP_OFF)(%eax)
+
+	leal	4(%esp), %ecx		/* Exclude the return address.  */
+	movl	%ecx, (LINUX_UC_MCONTEXT_OFF+LINUX_SC_ESP_OFF)(%eax)
+
+	/* glibc getcontext saves FS, but not GS */
+	xorl	%ecx, %ecx
+	movw	%fs, %cx
+	movl	%ecx, (LINUX_UC_MCONTEXT_OFF+LINUX_SC_FS_OFF)(%eax)
+
+	leal	LINUX_UC_FPREGS_MEM_OFF(%eax), %ecx
+	movl	%ecx, (LINUX_UC_MCONTEXT_OFF+LINUX_SC_FPSTATE_OFF)(%eax)
+	fnstenv	(%ecx)
+	fldenv	(%ecx)
+
+	xor	%eax, %eax
+	ret
+	.cfi_endproc
+	.size	_Ux86_getcontext, . - _Ux86_getcontext
+
+	/* We do not need executable stack.  */
+	.section        .note.GNU-stack,"",@progbits
diff --git a/src/third_party/unwind/dist/src/x86/init.h b/src/third_party/unwind/dist/src/x86/init.h
new file mode 100644
index 00000000000..b0db8d337df
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/init.h
@@ -0,0 +1,69 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+static inline int
+common_init (struct cursor *c, unsigned use_prev_instr)
+{
+  int ret, i;
+
+  c->dwarf.loc[EAX] = DWARF_REG_LOC (&c->dwarf, UNW_X86_EAX);
+  c->dwarf.loc[ECX] = DWARF_REG_LOC (&c->dwarf, UNW_X86_ECX);
+  c->dwarf.loc[EDX] = DWARF_REG_LOC (&c->dwarf, UNW_X86_EDX);
+  c->dwarf.loc[EBX] = DWARF_REG_LOC (&c->dwarf, UNW_X86_EBX);
+  c->dwarf.loc[ESP] = DWARF_REG_LOC (&c->dwarf, UNW_X86_ESP);
+  c->dwarf.loc[EBP] = DWARF_REG_LOC (&c->dwarf, UNW_X86_EBP);
+  c->dwarf.loc[ESI] = DWARF_REG_LOC (&c->dwarf, UNW_X86_ESI);
+  c->dwarf.loc[EDI] = DWARF_REG_LOC (&c->dwarf, UNW_X86_EDI);
+  c->dwarf.loc[EIP] = DWARF_REG_LOC (&c->dwarf, UNW_X86_EIP);
+  c->dwarf.loc[EFLAGS] = DWARF_REG_LOC (&c->dwarf, UNW_X86_EFLAGS);
+  c->dwarf.loc[TRAPNO] = DWARF_REG_LOC (&c->dwarf, UNW_X86_TRAPNO);
+  c->dwarf.loc[ST0] = DWARF_REG_LOC (&c->dwarf, UNW_X86_ST0);
+  for (i = ST0 + 1; i < DWARF_NUM_PRESERVED_REGS; ++i)
+    c->dwarf.loc[i] = DWARF_NULL_LOC;
+
+  ret = dwarf_get (&c->dwarf, c->dwarf.loc[EIP], &c->dwarf.ip);
+  if (ret < 0)
+    return ret;
+
+  ret = dwarf_get (&c->dwarf, DWARF_REG_LOC (&c->dwarf, UNW_X86_ESP),
+                   &c->dwarf.cfa);
+  if (ret < 0)
+    return ret;
+
+  c->sigcontext_format = X86_SCF_NONE;
+  c->sigcontext_addr = 0;
+
+  c->dwarf.args_size = 0;
+  c->dwarf.stash_frames = 0;
+  c->dwarf.use_prev_instr = use_prev_instr;
+  c->dwarf.pi_valid = 0;
+  c->dwarf.pi_is_dynamic = 0;
+  c->dwarf.hint = 0;
+  c->dwarf.prev_rs = 0;
+
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/x86/is_fpreg.c b/src/third_party/unwind/dist/src/x86/is_fpreg.c
new file mode 100644
index 00000000000..a3a98ac8d33
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/is_fpreg.c
@@ -0,0 +1,34 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2004-2005 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "libunwind_i.h"
+
+int
+unw_is_fpreg (int regnum)
+{
+  return ((regnum >= UNW_X86_ST0 && regnum <= UNW_X86_ST7)
+          || (regnum >= UNW_X86_XMM0_lo && regnum <= UNW_X86_XMM7_hi)
+          || (regnum >= UNW_X86_XMM0 && regnum <= UNW_X86_XMM7));
+}
diff --git a/src/third_party/unwind/dist/src/x86/longjmp.S b/src/third_party/unwind/dist/src/x86/longjmp.S
new file mode 100644
index 00000000000..05173d0c109
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/longjmp.S
@@ -0,0 +1,39 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+	.globl _UI_longjmp_cont
+
+	.type _UI_longjmp_cont, @function
+_UI_longjmp_cont:
+	.cfi_startproc
+	.cfi_register 8, 0	/* IP saved in EAX */
+	push %eax		/* push target IP as return address */
+	.cfi_restore 8
+	mov %edx, %eax		/* set up return-value */
+	ret
+	.cfi_endproc
+	.size _UI_siglongjmp_cont, .-_UI_longjmp_cont
+	/* We do not need executable stack.  */
+	.section	.note.GNU-stack,"",@progbits
diff --git a/src/third_party/unwind/dist/src/x86/offsets.h b/src/third_party/unwind/dist/src/x86/offsets.h
new file mode 100644
index 00000000000..e5aec7f5888
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/offsets.h
@@ -0,0 +1,140 @@
+/* Linux-specific definitions: */
+
+/* Define various structure offsets to simplify cross-compilation.  */
+
+/* Offsets for x86 Linux "ucontext_t":  */
+
+#define LINUX_UC_FLAGS_OFF      0x00
+#define LINUX_UC_LINK_OFF       0x04
+#define LINUX_UC_STACK_OFF      0x08
+#define LINUX_UC_MCONTEXT_OFF   0x14
+#define LINUX_UC_SIGMASK_OFF    0x6c
+#define LINUX_UC_FPREGS_MEM_OFF 0xec
+
+/* The struct sigcontext is located at an offset of 4
+   from the stack pointer in the signal frame.         */
+
+/* Offsets for x86 Linux "struct sigcontext":  */
+
+#define LINUX_SC_GS_OFF         0x00
+#define LINUX_SC_GSH_OFF        0x02
+#define LINUX_SC_FS_OFF         0x04
+#define LINUX_SC_FSH_OFF        0x06
+#define LINUX_SC_ES_OFF         0x08
+#define LINUX_SC_ESH_OFF        0x0a
+#define LINUX_SC_DS_OFF         0x0c
+#define LINUX_SC_DSH_OFF        0x0e
+#define LINUX_SC_EDI_OFF        0x10
+#define LINUX_SC_ESI_OFF        0x14
+#define LINUX_SC_EBP_OFF        0x18
+#define LINUX_SC_ESP_OFF        0x1c
+#define LINUX_SC_EBX_OFF        0x20
+#define LINUX_SC_EDX_OFF        0x24
+#define LINUX_SC_ECX_OFF        0x28
+#define LINUX_SC_EAX_OFF        0x2c
+#define LINUX_SC_TRAPNO_OFF     0x30
+#define LINUX_SC_ERR_OFF        0x34
+#define LINUX_SC_EIP_OFF        0x38
+#define LINUX_SC_CS_OFF         0x3c
+#define LINUX_SC_CSH_OFF        0x3e
+#define LINUX_SC_EFLAGS_OFF     0x40
+#define LINUX_SC_ESP_AT_SIGNAL_OFF      0x44
+#define LINUX_SC_SS_OFF         0x48
+#define LINUX_SC_SSH_OFF        0x4a
+#define LINUX_SC_FPSTATE_OFF    0x4c
+#define LINUX_SC_OLDMASK_OFF    0x50
+#define LINUX_SC_CR2_OFF        0x54
+
+/* Offsets for x86 Linux "struct _fpstate":  */
+
+#define LINUX_FPSTATE_CW_OFF            0x000
+#define LINUX_FPSTATE_SW_OFF            0x004
+#define LINUX_FPSTATE_TAG_OFF           0x008
+#define LINUX_FPSTATE_IPOFF_OFF         0x00c
+#define LINUX_FPSTATE_CSSEL_OFF         0x010
+#define LINUX_FPSTATE_DATAOFF_OFF       0x014
+#define LINUX_FPSTATE_DATASEL_OFF       0x018
+#define LINUX_FPSTATE_ST0_OFF           0x01c
+#define LINUX_FPSTATE_ST1_OFF           0x026
+#define LINUX_FPSTATE_ST2_OFF           0x030
+#define LINUX_FPSTATE_ST3_OFF           0x03a
+#define LINUX_FPSTATE_ST4_OFF           0x044
+#define LINUX_FPSTATE_ST5_OFF           0x04e
+#define LINUX_FPSTATE_ST6_OFF           0x058
+#define LINUX_FPSTATE_ST7_OFF           0x062
+#define LINUX_FPSTATE_STATUS_OFF        0x06c
+#define LINUX_FPSTATE_MAGIC_OFF         0x06e
+#define LINUX_FPSTATE_FXSR_ENV_OFF      0x070
+#define LINUX_FPSTATE_MXCSR_OFF         0x088
+#define LINUX_FPSTATE_FXSR_ST0_OFF      0x090
+#define LINUX_FPSTATE_FXSR_ST1_OFF      0x0a0
+#define LINUX_FPSTATE_FXSR_ST2_OFF      0x0b0
+#define LINUX_FPSTATE_FXSR_ST3_OFF      0x0c0
+#define LINUX_FPSTATE_FXSR_ST4_OFF      0x0d0
+#define LINUX_FPSTATE_FXSR_ST5_OFF      0x0e0
+#define LINUX_FPSTATE_FXSR_ST6_OFF      0x0f0
+#define LINUX_FPSTATE_FXSR_ST7_OFF      0x100
+#define LINUX_FPSTATE_XMM0_OFF          0x110
+#define LINUX_FPSTATE_XMM1_OFF          0x120
+#define LINUX_FPSTATE_XMM2_OFF          0x130
+#define LINUX_FPSTATE_XMM3_OFF          0x140
+#define LINUX_FPSTATE_XMM4_OFF          0x150
+#define LINUX_FPSTATE_XMM5_OFF          0x160
+#define LINUX_FPSTATE_XMM6_OFF          0x170
+#define LINUX_FPSTATE_XMM7_OFF          0x180
+
+/* FreeBSD-specific definitions: */
+
+#define FREEBSD_SC_UCONTEXT_OFF         0x20
+#define FREEBSD_UC_MCONTEXT_OFF         0x10
+
+#define FREEBSD_UC_MCONTEXT_GS_OFF      0x14
+#define FREEBSD_UC_MCONTEXT_FS_OFF      0x18
+#define FREEBSD_UC_MCONTEXT_ES_OFF      0x1c
+#define FREEBSD_UC_MCONTEXT_DS_OFF      0x20
+#define FREEBSD_UC_MCONTEXT_EDI_OFF     0x24
+#define FREEBSD_UC_MCONTEXT_ESI_OFF     0x28
+#define FREEBSD_UC_MCONTEXT_EBP_OFF     0x2c
+#define FREEBSD_UC_MCONTEXT_EBX_OFF     0x34
+#define FREEBSD_UC_MCONTEXT_EDX_OFF     0x38
+#define FREEBSD_UC_MCONTEXT_ECX_OFF     0x3c
+#define FREEBSD_UC_MCONTEXT_EAX_OFF     0x40
+#define FREEBSD_UC_MCONTEXT_TRAPNO_OFF  0x44
+#define FREEBSD_UC_MCONTEXT_EIP_OFF     0x4c
+#define FREEBSD_UC_MCONTEXT_ESP_OFF     0x58
+#define FREEBSD_UC_MCONTEXT_CS_OFF      0x50
+#define FREEBSD_UC_MCONTEXT_EFLAGS_OFF  0x54
+#define FREEBSD_UC_MCONTEXT_SS_OFF      0x5c
+#define FREEBSD_UC_MCONTEXT_MC_LEN_OFF  0x60
+#define FREEBSD_UC_MCONTEXT_FPFORMAT_OFF 0x64
+#define FREEBSD_UC_MCONTEXT_OWNEDFP_OFF 0x68
+#define FREEBSD_UC_MCONTEXT_FPSTATE_OFF 0x70
+
+#define FREEBSD_UC_MCONTEXT_CW_OFF      0x70
+#define FREEBSD_UC_MCONTEXT_SW_OFF      0x74
+#define FREEBSD_UC_MCONTEXT_TAG_OFF     0x78
+#define FREEBSD_UC_MCONTEXT_IPOFF_OFF   0x7c
+#define FREEBSD_UC_MCONTEXT_CSSEL_OFF   0x80
+#define FREEBSD_UC_MCONTEXT_DATAOFF_OFF 0x84
+#define FREEBSD_US_MCONTEXT_DATASEL_OFF 0x88
+#define FREEBSD_UC_MCONTEXT_ST0_OFF     0x8c
+
+#define FREEBSD_UC_MCONTEXT_CW_XMM_OFF  0x70
+#define FREEBSD_UC_MCONTEXT_SW_XMM_OFF  0x72
+#define FREEBSD_UC_MCONTEXT_TAG_XMM_OFF 0x74
+#define FREEBSD_UC_MCONTEXT_IPOFF_XMM_OFF 0x78
+#define FREEBSD_UC_MCONTEXT_CSSEL_XMM_OFF 0x7c
+#define FREEBSD_UC_MCONTEXT_DATAOFF_XMM_OFF 0x80
+#define FREEBSD_US_MCONTEXT_DATASEL_XMM_OFF 0x84
+#define FREEBSD_UC_MCONTEXT_MXCSR_XMM_OFF 0x88
+#define FREEBSD_UC_MCONTEXT_ST0_XMM_OFF 0x90
+#define FREEBSD_UC_MCONTEXT_XMM0_OFF    0x110
+
+#define FREEBSD_UC_MCONTEXT_MC_LEN_VAL  0x280
+#define FREEBSD_UC_MCONTEXT_FPFMT_NODEV 0x10000
+#define FREEBSD_UC_MCONTEXT_FPFMT_387   0x10001
+#define FREEBSD_UC_MCONTEXT_FPFMT_XMM   0x10002
+#define FREEBSD_UC_MCONTEXT_FPOWNED_NONE 0x20000
+#define FREEBSD_UC_MCONTEXT_FPOWNED_FPU 0x20001
+#define FREEBSD_UC_MCONTEXT_FPOWNED_PCB 0x20002
+
diff --git a/src/third_party/unwind/dist/src/x86/regname.c b/src/third_party/unwind/dist/src/x86/regname.c
new file mode 100644
index 00000000000..11f62280413
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/regname.c
@@ -0,0 +1,27 @@
+#include "unwind_i.h"
+
+static const char *regname[] =
+  {
+    "eax", "edx", "ecx", "ebx", "esi", "edi", "ebp", "esp", "eip",
+    "eflags", "trapno",
+    "st0", "st1", "st2", "st3", "st4", "st5", "st6", "st7",
+    "fcw", "fsw", "ftw", "fop", "fcs", "fip", "fea", "fds",
+    "xmm0_lo", "xmm0_hi", "xmm1_lo", "xmm1_hi",
+    "xmm2_lo", "xmm2_hi", "xmm3_lo", "xmm3_hi",
+    "xmm4_lo", "xmm4_hi", "xmm5_lo", "xmm5_hi",
+    "xmm6_lo", "xmm6_hi", "xmm7_lo", "xmm7_hi",
+    "mxcsr",
+    "gs", "fs", "es", "ds", "ss", "cs",
+    "tss", "ldt",
+    "cfi",
+    "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5", "xmm6", "xmm7",
+  };
+
+const char *
+unw_regname (unw_regnum_t reg)
+{
+  if (reg < (unw_regnum_t) ARRAY_SIZE (regname))
+    return regname[reg];
+  else
+    return "???";
+}
diff --git a/src/third_party/unwind/dist/src/x86/siglongjmp.S b/src/third_party/unwind/dist/src/x86/siglongjmp.S
new file mode 100644
index 00000000000..32bba3b3b69
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/siglongjmp.S
@@ -0,0 +1,92 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+   Copyright (C) 2011 Konstantin Belousov <kib@FreeBSD.org>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+	.globl _UI_siglongjmp_cont
+
+#if defined(__linux__)
+#define SIG_SETMASK 2
+#elif defined(__FreeBSD__)
+#define SIG_SETMASK 3
+#endif
+
+	/* Stack layout at this point:
+
+		+------------+ <- original $esp (at time of setjmp() call)
+		| sigmask[1] |
+		+------------+
+		| sigmask[0] |
+		+------------+
+	 */
+
+	.type _UI_siglongjmp_cont, @function
+_UI_siglongjmp_cont:
+	.cfi_startproc
+#ifdef __linux__
+	.cfi_register 8, 0	/* IP saved in EAX */
+	.cfi_def_cfa_offset 8
+	mov %esp, %ecx		/* pass address of signal mask in 3rd sc arg */
+	push %eax		/* save target IP */
+	.cfi_adjust_cfa_offset 4
+	.cfi_offset 8, -12
+	push %edx		/* save return value */
+	.cfi_adjust_cfa_offset 4
+	push %ebx		/* save %ebx (preserved) */
+	.cfi_adjust_cfa_offset 4
+	.cfi_offset 3, -20
+	mov $SIG_SETMASK, %ebx	/* 1st syscall arg (how) */
+	xor %edx, %edx		/* pass NULL as 3rd syscall arg (old maskp) */
+	int $0x80
+	pop %ebx		/* restore %ebx */
+	.cfi_adjust_cfa_offset -4
+	.cfi_restore 3
+	pop %eax		/* fetch return value */
+	.cfi_adjust_cfa_offset -4
+	pop %edx		/* pop target IP */
+	.cfi_adjust_cfa_offset -4
+	.cfi_register 8, 2	/* saved IP is now n EDX */
+	lea 8(%esp), %esp	/* pop sigmask */
+	.cfi_adjust_cfa_offset -4
+	jmp *%edx
+#elif defined(__FreeBSD__)
+	pushl	%eax
+	pushl	%edx
+	pushl	$0
+	pushl	%ecx
+	pushl	$SIG_SETMASK
+	movl	$340,%eax
+	pushl	%eax
+	int	$0x80
+	addl	$16,%esp
+	popl	%eax
+	popl	%edx
+	jmp	*%edx
+#else
+#error Port me
+#endif
+	.cfi_endproc
+	.size _UI_siglongjmp_cont, .-_UI_siglongjmp_cont
+	/* We do not need executable stack.  */
+	.section	.note.GNU-stack,"",@progbits
diff --git a/src/third_party/unwind/dist/src/x86/unwind_i.h b/src/third_party/unwind/dist/src/x86/unwind_i.h
new file mode 100644
index 00000000000..caa7e02dee4
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86/unwind_i.h
@@ -0,0 +1,68 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef unwind_i_h
+#define unwind_i_h
+
+#include <stdint.h>
+
+#include <libunwind-x86.h>
+
+#include "libunwind_i.h"
+
+/* DWARF column numbers: */
+#define EAX     0
+#define ECX     1
+#define EDX     2
+#define EBX     3
+#define ESP     4
+#define EBP     5
+#define ESI     6
+#define EDI     7
+#define EIP     8
+#define EFLAGS  9
+#define TRAPNO  10
+#define ST0     11
+
+#define x86_lock                        UNW_OBJ(lock)
+#define x86_local_resume                UNW_OBJ(local_resume)
+#define x86_local_addr_space_init       UNW_OBJ(local_addr_space_init)
+#define x86_scratch_loc                 UNW_OBJ(scratch_loc)
+#define x86_get_scratch_loc             UNW_OBJ(get_scratch_loc)
+#define x86_r_uc_addr                   UNW_OBJ(r_uc_addr)
+#define x86_sigreturn                   UNW_OBJ(sigreturn)
+
+extern void x86_local_addr_space_init (void);
+extern int x86_local_resume (unw_addr_space_t as, unw_cursor_t *cursor,
+                             void *arg);
+extern dwarf_loc_t x86_scratch_loc (struct cursor *c, unw_regnum_t reg);
+extern dwarf_loc_t x86_get_scratch_loc (struct cursor *c, unw_regnum_t reg);
+extern void *x86_r_uc_addr (ucontext_t *uc, int reg);
+
+extern void x86_sigreturn (unw_cursor_t *cursor);
+#define x86_handle_signal_frame UNW_OBJ(handle_signal_frame)
+extern int x86_handle_signal_frame(unw_cursor_t *cursor);
+
+#endif /* unwind_i_h */
diff --git a/src/third_party/unwind/dist/src/x86_64/Gapply_reg_state.c b/src/third_party/unwind/dist/src/x86_64/Gapply_reg_state.c
new file mode 100644
index 00000000000..82f056da67e
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/Gapply_reg_state.c
@@ -0,0 +1,37 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_apply_reg_state (unw_cursor_t *cursor,
+		     void *reg_states_data)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  return dwarf_apply_reg_state (&c->dwarf, (dwarf_reg_state_t *)reg_states_data);
+}
diff --git a/src/third_party/unwind/dist/src/x86_64/Gcreate_addr_space.c b/src/third_party/unwind/dist/src/x86_64/Gcreate_addr_space.c
new file mode 100644
index 00000000000..9b2db9810ab
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/Gcreate_addr_space.c
@@ -0,0 +1,61 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <stdlib.h>
+
+#include "unwind_i.h"
+
+#if defined(_LITTLE_ENDIAN) && !defined(__LITTLE_ENDIAN)
+#define __LITTLE_ENDIAN _LITTLE_ENDIAN
+#endif
+
+unw_addr_space_t
+unw_create_addr_space (unw_accessors_t *a, int byte_order)
+{
+#ifdef UNW_LOCAL_ONLY
+  return NULL;
+#else
+  unw_addr_space_t as;
+
+  /*
+   * x86_64 supports only little-endian.
+   */
+  if (byte_order != 0 && byte_order != __LITTLE_ENDIAN)
+    return NULL;
+
+  as = malloc (sizeof (*as));
+  if (!as)
+    return NULL;
+
+  memset (as, 0, sizeof (*as));
+
+  as->acc = *a;
+
+  return as;
+#endif
+}
diff --git a/src/third_party/unwind/dist/src/x86_64/Gget_proc_info.c b/src/third_party/unwind/dist/src/x86_64/Gget_proc_info.c
new file mode 100644
index 00000000000..50de1e423c2
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/Gget_proc_info.c
@@ -0,0 +1,48 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_get_proc_info (unw_cursor_t *cursor, unw_proc_info_t *pi)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  if (dwarf_make_proc_info (&c->dwarf) < 0)
+    {
+      /* On x86-64, some key routines such as _start() and _dl_start()
+         are missing DWARF unwind info.  We don't want to fail in that
+         case, because those frames are uninteresting and just mark
+         the end of the frame-chain anyhow.  */
+      memset (pi, 0, sizeof (*pi));
+      pi->start_ip = c->dwarf.ip;
+      pi->end_ip = c->dwarf.ip + 1;
+      return 0;
+    }
+  *pi = c->dwarf.pi;
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/x86_64/Gget_save_loc.c b/src/third_party/unwind/dist/src/x86_64/Gget_save_loc.c
new file mode 100644
index 00000000000..40568700e0e
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/Gget_save_loc.c
@@ -0,0 +1,74 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_get_save_loc (unw_cursor_t *cursor, int reg, unw_save_loc_t *sloc)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  dwarf_loc_t loc;
+
+  loc = DWARF_NULL_LOC;         /* default to "not saved" */
+
+  switch (reg)
+    {
+    case UNW_X86_64_RBX: loc = c->dwarf.loc[RBX]; break;
+    case UNW_X86_64_RSP: loc = c->dwarf.loc[RSP]; break;
+    case UNW_X86_64_RBP: loc = c->dwarf.loc[RBP]; break;
+    case UNW_X86_64_R12: loc = c->dwarf.loc[R12]; break;
+    case UNW_X86_64_R13: loc = c->dwarf.loc[R13]; break;
+    case UNW_X86_64_R14: loc = c->dwarf.loc[R14]; break;
+    case UNW_X86_64_R15: loc = c->dwarf.loc[R15]; break;
+    case UNW_X86_64_RIP: loc = c->dwarf.loc[RIP]; break;
+
+    default:
+      break;
+    }
+
+  memset (sloc, 0, sizeof (*sloc));
+
+  if (DWARF_IS_NULL_LOC (loc))
+    {
+      sloc->type = UNW_SLT_NONE;
+      return 0;
+    }
+
+#if !defined(UNW_LOCAL_ONLY)
+  if (DWARF_IS_REG_LOC (loc))
+    {
+      sloc->type = UNW_SLT_REG;
+      sloc->u.regnum = DWARF_GET_LOC (loc);
+    }
+  else
+#endif
+    {
+      sloc->type = UNW_SLT_MEMORY;
+      sloc->u.addr = DWARF_GET_LOC (loc);
+    }
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/x86_64/Gglobal.c b/src/third_party/unwind/dist/src/x86_64/Gglobal.c
new file mode 100644
index 00000000000..8d1fbb4b0a9
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/Gglobal.c
@@ -0,0 +1,102 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2003, 2005 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "config.h"
+#include "unwind_i.h"
+#include "dwarf_i.h"
+
+HIDDEN define_lock (x86_64_lock);
+HIDDEN int tdep_init_done;
+
+/* See comments for svr4_dbx_register_map[] in gcc/config/i386/i386.c.  */
+
+HIDDEN const uint8_t dwarf_to_unw_regnum_map[DWARF_NUM_PRESERVED_REGS] =
+  {
+    UNW_X86_64_RAX,
+    UNW_X86_64_RDX,
+    UNW_X86_64_RCX,
+    UNW_X86_64_RBX,
+    UNW_X86_64_RSI,
+    UNW_X86_64_RDI,
+    UNW_X86_64_RBP,
+    UNW_X86_64_RSP,
+    UNW_X86_64_R8,
+    UNW_X86_64_R9,
+    UNW_X86_64_R10,
+    UNW_X86_64_R11,
+    UNW_X86_64_R12,
+    UNW_X86_64_R13,
+    UNW_X86_64_R14,
+    UNW_X86_64_R15,
+    UNW_X86_64_RIP,
+#ifdef CONFIG_MSABI_SUPPORT
+    UNW_X86_64_XMM0,
+    UNW_X86_64_XMM1,
+    UNW_X86_64_XMM2,
+    UNW_X86_64_XMM3,
+    UNW_X86_64_XMM4,
+    UNW_X86_64_XMM5,
+    UNW_X86_64_XMM6,
+    UNW_X86_64_XMM7,
+    UNW_X86_64_XMM8,
+    UNW_X86_64_XMM9,
+    UNW_X86_64_XMM10,
+    UNW_X86_64_XMM11,
+    UNW_X86_64_XMM12,
+    UNW_X86_64_XMM13,
+    UNW_X86_64_XMM14,
+    UNW_X86_64_XMM15
+#endif
+  };
+
+HIDDEN void
+tdep_init (void)
+{
+  intrmask_t saved_mask;
+
+  sigfillset (&unwi_full_mask);
+
+  lock_acquire (&x86_64_lock, saved_mask);
+  {
+    if (tdep_init_done)
+      /* another thread else beat us to it... */
+      goto out;
+
+    mi_init ();
+
+    dwarf_init ();
+
+    tdep_init_mem_validate ();
+
+#ifndef UNW_REMOTE_ONLY
+    x86_64_local_addr_space_init ();
+#endif
+    tdep_init_done = 1; /* signal that we're initialized... */
+  }
+ out:
+  lock_release (&x86_64_lock, saved_mask);
+}
diff --git a/src/third_party/unwind/dist/src/x86_64/Ginit.c b/src/third_party/unwind/dist/src/x86_64/Ginit.c
new file mode 100644
index 00000000000..6161da6401b
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/Ginit.c
@@ -0,0 +1,399 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002 Hewlett-Packard Co
+   Copyright (C) 2007 David Mosberger-Tang
+        Contributed by David Mosberger-Tang <dmosberger@gmail.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <sys/syscall.h>
+
+#include "unwind_i.h"
+
+#ifdef UNW_REMOTE_ONLY
+
+/* unw_local_addr_space is a NULL pointer in this case.  */
+unw_addr_space_t unw_local_addr_space;
+
+#else /* !UNW_REMOTE_ONLY */
+
+static struct unw_addr_space local_addr_space;
+
+unw_addr_space_t unw_local_addr_space = &local_addr_space;
+
+HIDDEN unw_dyn_info_list_t _U_dyn_info_list;
+
+/* XXX fix me: there is currently no way to locate the dyn-info list
+       by a remote unwinder.  On ia64, this is done via a special
+       unwind-table entry.  Perhaps something similar can be done with
+       DWARF2 unwind info.  */
+
+static void
+put_unwind_info (unw_addr_space_t as, unw_proc_info_t *proc_info, void *arg)
+{
+  /* it's a no-op */
+}
+
+static int
+get_dyn_info_list_addr (unw_addr_space_t as, unw_word_t *dyn_info_list_addr,
+                        void *arg)
+{
+  *dyn_info_list_addr = (unw_word_t) &_U_dyn_info_list;
+  return 0;
+}
+
+#define PAGE_SIZE 4096
+#define PAGE_START(a)   ((a) & ~(PAGE_SIZE-1))
+
+static int mem_validate_pipe[2] = {-1, -1};
+
+static inline void
+open_pipe (void)
+{
+  if (mem_validate_pipe[0] != -1)
+    close (mem_validate_pipe[0]);
+  if (mem_validate_pipe[1] != -1)
+    close (mem_validate_pipe[1]);
+
+  pipe2 (mem_validate_pipe, O_CLOEXEC | O_NONBLOCK);
+}
+
+ALWAYS_INLINE
+static int
+write_validate (void *addr)
+{
+  int ret = -1;
+  ssize_t bytes = 0;
+
+  do
+    {
+      char buf;
+      bytes = read (mem_validate_pipe[0], &buf, 1);
+    }
+  while ( errno == EINTR );
+
+  int valid_read = (bytes > 0 || errno == EAGAIN || errno == EWOULDBLOCK);
+  if (!valid_read)
+    {
+      // re-open closed pipe
+      open_pipe ();
+    }
+
+  do
+    {
+      /* use syscall insteadof write() so that ASAN does not complain */
+      ret = syscall (SYS_write, mem_validate_pipe[1], addr, 1);
+    }
+  while ( errno == EINTR );
+
+  return ret;
+}
+
+static int (*mem_validate_func) (void *addr, size_t len);
+static int msync_validate (void *addr, size_t len)
+{
+  if (msync (addr, len, MS_ASYNC) != 0)
+    {
+      return -1;
+    }
+
+  return write_validate (addr);
+}
+
+#ifdef HAVE_MINCORE
+static int mincore_validate (void *addr, size_t len)
+{
+  unsigned char mvec[2]; /* Unaligned access may cross page boundary */
+
+  /* mincore could fail with EAGAIN but we conservatively return -1
+     instead of looping. */
+  if (mincore (addr, len, mvec) != 0)
+    {
+      return -1;
+    }
+
+  return write_validate (addr);
+}
+#endif
+
+/* Initialise memory validation method. On linux kernels <2.6.21,
+   mincore() returns incorrect value for MAP_PRIVATE mappings,
+   such as stacks. If mincore() was available at compile time,
+   check if we can actually use it. If not, use msync() instead. */
+HIDDEN void
+tdep_init_mem_validate (void)
+{
+  open_pipe ();
+
+#ifdef HAVE_MINCORE
+  unsigned char present = 1;
+  unw_word_t addr = PAGE_START((unw_word_t)&present);
+  unsigned char mvec[1];
+  int ret;
+  while ((ret = mincore ((void*)addr, PAGE_SIZE, mvec)) == -1 &&
+         errno == EAGAIN) {}
+  if (ret == 0)
+    {
+      Debug(1, "using mincore to validate memory\n");
+      mem_validate_func = mincore_validate;
+    }
+  else
+#endif
+    {
+      Debug(1, "using msync to validate memory\n");
+      mem_validate_func = msync_validate;
+    }
+}
+
+/* Cache of already validated addresses */
+#define NLGA 4
+#if defined(HAVE___THREAD) && HAVE___THREAD
+// thread-local variant
+static __thread unw_word_t last_good_addr[NLGA];
+static __thread int lga_victim;
+
+static int
+is_cached_valid_mem(unw_word_t addr)
+{
+  int i;
+  for (i = 0; i < NLGA; i++)
+    {
+      if (addr == &last_good_addr[i])
+        return 1;
+    }
+  return 0;
+}
+
+static void
+cache_valid_mem(unw_word_t addr)
+{
+  int i, victim;
+  victim = lga_victim;
+  for (i = 0; i < NLGA; i++) {
+    if (last_good_addr[victim] == 0) {
+      last_good_addr[victim] = addr;
+      return;
+    }
+    victim = (victim + 1) % NLGA;
+  }
+
+  /* All slots full. Evict the victim. */
+  last_good_addr[victim] = addr;
+  victim = (victim + 1) % NLGA;
+  lga_victim = victim;
+}
+
+#elif HAVE_ATOMIC_OPS_H
+// global, thread safe variant
+static AO_T last_good_addr[NLGA];
+static AO_T lga_victim;
+
+static int
+is_cached_valid_mem(unw_word_t addr)
+{
+  int i;
+  for (i = 0; i < NLGA; i++)
+    {
+      if (addr == AO_load(&last_good_addr[i]))
+        return 1;
+    }
+  return 0;
+}
+
+static void
+cache_valid_mem(unw_word_t addr)
+{
+  int i, victim;
+  victim = AO_load(&lga_victim);
+  for (i = 0; i < NLGA; i++) {
+    if (AO_compare_and_swap(&last_good_addr[victim], 0, addr)) {
+      return;
+    }
+    victim = (victim + 1) % NLGA;
+  }
+
+  /* All slots full. Evict the victim. */
+  AO_store(&last_good_addr[victim], addr);
+  victim = (victim + 1) % NLGA;
+  AO_store(&lga_victim, victim);
+}
+#else
+// disabled, no cache
+static int
+is_cached_valid_mem(unw_word_t addr UNUSED)
+{
+  return 0;
+}
+
+static void
+cache_valid_mem(unw_word_t addr UNUSED)
+{
+}
+#endif
+
+static int
+validate_mem (unw_word_t addr)
+{
+  size_t len;
+
+  if (PAGE_START(addr + sizeof (unw_word_t) - 1) == PAGE_START(addr))
+    len = PAGE_SIZE;
+  else
+    len = PAGE_SIZE * 2;
+
+  addr = PAGE_START(addr);
+
+  if (addr == 0)
+    return -1;
+
+  if (is_cached_valid_mem(addr))
+    return 0;
+
+  if (mem_validate_func ((void *) addr, len) == -1)
+    return -1;
+
+  cache_valid_mem(addr);
+
+  return 0;
+}
+
+static int
+access_mem (unw_addr_space_t as, unw_word_t addr, unw_word_t *val, int write,
+            void *arg)
+{
+  if (unlikely (write))
+    {
+      Debug (16, "mem[%016lx] <- %lx\n", addr, *val);
+      *(unw_word_t *) addr = *val;
+    }
+  else
+    {
+      /* validate address */
+      const struct cursor *c = (const struct cursor *)arg;
+      if (likely (c != NULL) && unlikely (c->validate)
+          && unlikely (validate_mem (addr))) {
+        Debug (16, "mem[%016lx] -> invalid\n", addr);
+        return -1;
+      }
+      *val = *(unw_word_t *) addr;
+      Debug (16, "mem[%016lx] -> %lx\n", addr, *val);
+    }
+  return 0;
+}
+
+static int
+access_reg (unw_addr_space_t as, unw_regnum_t reg, unw_word_t *val, int write,
+            void *arg)
+{
+  unw_word_t *addr;
+  ucontext_t *uc = ((struct cursor *)arg)->uc;
+
+  if (unw_is_fpreg (reg))
+    goto badreg;
+
+  if (!(addr = x86_64_r_uc_addr (uc, reg)))
+    goto badreg;
+
+  if (write)
+    {
+      *(unw_word_t *) addr = *val;
+      Debug (12, "%s <- 0x%016lx\n", unw_regname (reg), *val);
+    }
+  else
+    {
+      *val = *(unw_word_t *) addr;
+      Debug (12, "%s -> 0x%016lx\n", unw_regname (reg), *val);
+    }
+  return 0;
+
+ badreg:
+  Debug (1, "bad register number %u\n", reg);
+  return -UNW_EBADREG;
+}
+
+static int
+access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val,
+              int write, void *arg)
+{
+  ucontext_t *uc = ((struct cursor *)arg)->uc;
+  unw_fpreg_t *addr;
+
+  if (!unw_is_fpreg (reg))
+    goto badreg;
+
+  if (!(addr = x86_64_r_uc_addr (uc, reg)))
+    goto badreg;
+
+  if (write)
+    {
+      Debug (12, "%s <- %08lx.%08lx.%08lx\n", unw_regname (reg),
+             ((long *)val)[0], ((long *)val)[1], ((long *)val)[2]);
+      *(unw_fpreg_t *) addr = *val;
+    }
+  else
+    {
+      *val = *(unw_fpreg_t *) addr;
+      Debug (12, "%s -> %08lx.%08lx.%08lx\n", unw_regname (reg),
+             ((long *)val)[0], ((long *)val)[1], ((long *)val)[2]);
+    }
+  return 0;
+
+ badreg:
+  Debug (1, "bad register number %u\n", reg);
+  /* attempt to access a non-preserved register */
+  return -UNW_EBADREG;
+}
+
+static int
+get_static_proc_name (unw_addr_space_t as, unw_word_t ip,
+                      char *buf, size_t buf_len, unw_word_t *offp,
+                      void *arg)
+{
+  return _Uelf64_get_proc_name (as, getpid (), ip, buf, buf_len, offp);
+}
+
+HIDDEN void
+x86_64_local_addr_space_init (void)
+{
+  memset (&local_addr_space, 0, sizeof (local_addr_space));
+  local_addr_space.caching_policy = UNWI_DEFAULT_CACHING_POLICY;
+  local_addr_space.acc.find_proc_info = dwarf_find_proc_info;
+  local_addr_space.acc.put_unwind_info = put_unwind_info;
+  local_addr_space.acc.get_dyn_info_list_addr = get_dyn_info_list_addr;
+  local_addr_space.acc.access_mem = access_mem;
+  local_addr_space.acc.access_reg = access_reg;
+  local_addr_space.acc.access_fpreg = access_fpreg;
+  local_addr_space.acc.resume = x86_64_local_resume;
+  local_addr_space.acc.get_proc_name = get_static_proc_name;
+  unw_flush_cache (&local_addr_space, 0, 0);
+}
+
+#endif /* !UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/dist/src/x86_64/Ginit_local.c b/src/third_party/unwind/dist/src/x86_64/Ginit_local.c
new file mode 100644
index 00000000000..5eaead0f840
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/Ginit_local.c
@@ -0,0 +1,81 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "init.h"
+
+#ifdef UNW_REMOTE_ONLY
+
+int
+unw_init_local (unw_cursor_t *cursor, ucontext_t *uc)
+{
+  return -UNW_EINVAL;
+}
+
+#else /* !UNW_REMOTE_ONLY */
+
+static int
+unw_init_local_common (unw_cursor_t *cursor, ucontext_t *uc, unsigned use_prev_instr)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  if (unlikely (!tdep_init_done))
+    tdep_init ();
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  c->dwarf.as = unw_local_addr_space;
+  c->dwarf.as_arg = c;
+  c->uc = uc;
+  c->validate = 0;
+  return common_init (c, use_prev_instr);
+}
+
+int
+unw_init_local (unw_cursor_t *cursor, ucontext_t *uc)
+{
+  return unw_init_local_common(cursor, uc, 1);
+}
+
+int
+unw_init_local2 (unw_cursor_t *cursor, ucontext_t *uc, int flag)
+{
+  if (!flag)
+    {
+      return unw_init_local_common(cursor, uc, 1);
+    }
+  else if (flag == UNW_INIT_SIGNAL_FRAME)
+    {
+      return unw_init_local_common(cursor, uc, 0);
+    }
+  else
+    {
+      return -UNW_EINVAL;
+    }
+}
+
+#endif /* !UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/dist/src/x86_64/Ginit_remote.c b/src/third_party/unwind/dist/src/x86_64/Ginit_remote.c
new file mode 100644
index 00000000000..efd61d64d4b
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/Ginit_remote.c
@@ -0,0 +1,57 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "init.h"
+#include "unwind_i.h"
+
+int
+unw_init_remote (unw_cursor_t *cursor, unw_addr_space_t as, void *as_arg)
+{
+#ifdef UNW_LOCAL_ONLY
+  return -UNW_EINVAL;
+#else /* !UNW_LOCAL_ONLY */
+  struct cursor *c = (struct cursor *) cursor;
+
+  if (!tdep_init_done)
+    tdep_init ();
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  c->dwarf.as = as;
+  if (as == unw_local_addr_space)
+    {
+      c->dwarf.as_arg = c;
+      c->uc = as_arg;
+    }
+  else
+    {
+      c->dwarf.as_arg = as_arg;
+      c->uc = NULL;
+    }
+  return common_init (c, 0);
+#endif /* !UNW_LOCAL_ONLY */
+}
diff --git a/src/third_party/unwind/dist/src/x86_64/Gos-freebsd.c b/src/third_party/unwind/dist/src/x86_64/Gos-freebsd.c
new file mode 100644
index 00000000000..883025c88dd
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/Gos-freebsd.c
@@ -0,0 +1,218 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2010 Konstantin Belousov <kib@freebsd.org>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <sys/ucontext.h>
+#include <machine/sigframe.h>
+#include <signal.h>
+#include <stddef.h>
+#include "unwind_i.h"
+#include "ucontext_i.h"
+
+int
+unw_is_signal_frame (unw_cursor_t *cursor)
+{
+  /* XXXKIB */
+  struct cursor *c = (struct cursor *) cursor;
+  unw_word_t w0, w1, w2, b0, ip;
+  unw_addr_space_t as;
+  unw_accessors_t *a;
+  void *arg;
+  int ret;
+
+  as = c->dwarf.as;
+  a = unw_get_accessors_int (as);
+  arg = c->dwarf.as_arg;
+
+  /* Check if RIP points at sigreturn sequence.
+48 8d 7c 24 10          lea     SIGF_UC(%rsp),%rdi
+6a 00                   pushq   $0
+48 c7 c0 a1 01 00 00    movq    $SYS_sigreturn,%rax
+0f 05                   syscall
+f4              0:      hlt
+eb fd                   jmp     0b
+  */
+
+  ip = c->dwarf.ip;
+  c->sigcontext_format = X86_64_SCF_NONE;
+  if ((ret = (*a->access_mem) (as, ip, &w0, 0, arg)) < 0
+      || (ret = (*a->access_mem) (as, ip + 8, &w1, 0, arg)) < 0
+      || (ret = (*a->access_mem) (as, ip + 16, &w2, 0, arg)) < 0)
+    return 0;
+  w2 &= 0xffffff;
+  if (w0 == 0x48006a10247c8d48 &&
+      w1 == 0x050f000001a1c0c7 &&
+      w2 == 0x0000000000fdebf4)
+   {
+     c->sigcontext_format = X86_64_SCF_FREEBSD_SIGFRAME;
+     return (c->sigcontext_format);
+   }
+  /* Check if RIP points at standard syscall sequence.
+49 89 ca        mov    %rcx,%r10
+0f 05           syscall
+  */
+  if ((ret = (*a->access_mem) (as, ip - 5, &b0, 0, arg)) < 0)
+    return (0);
+  Debug (12, "b0 0x%lx\n", b0);
+  if ((b0 & 0xffffffffffffff) == 0x050fca89490000 ||
+      (b0 & 0xffffffffff) == 0x050fca8949)
+   {
+    c->sigcontext_format = X86_64_SCF_FREEBSD_SYSCALL;
+    return (c->sigcontext_format);
+   }
+  return (X86_64_SCF_NONE);
+}
+
+HIDDEN int
+x86_64_handle_signal_frame (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  unw_word_t ucontext;
+  int ret;
+
+  if (c->sigcontext_format == X86_64_SCF_FREEBSD_SIGFRAME)
+   {
+    ucontext = c->dwarf.cfa + offsetof(struct sigframe, sf_uc);
+    c->sigcontext_addr = c->dwarf.cfa;
+    Debug(1, "signal frame, skip over trampoline\n");
+
+    struct dwarf_loc rsp_loc = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_RSP, 0);
+    ret = dwarf_get (&c->dwarf, rsp_loc, &c->dwarf.cfa);
+    if (ret < 0)
+     {
+       Debug (2, "returning %d\n", ret);
+       return ret;
+     }
+
+    c->dwarf.loc[RAX] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_RAX, 0);
+    c->dwarf.loc[RDX] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_RDX, 0);
+    c->dwarf.loc[RCX] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_RCX, 0);
+    c->dwarf.loc[RBX] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_RBX, 0);
+    c->dwarf.loc[RSI] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_RSI, 0);
+    c->dwarf.loc[RDI] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_RDI, 0);
+    c->dwarf.loc[RBP] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_RBP, 0);
+    c->dwarf.loc[RSP] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_RSP, 0);
+    c->dwarf.loc[ R8] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R8, 0);
+    c->dwarf.loc[ R9] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R9, 0);
+    c->dwarf.loc[R10] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R10, 0);
+    c->dwarf.loc[R11] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R11, 0);
+    c->dwarf.loc[R12] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R12, 0);
+    c->dwarf.loc[R13] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R13, 0);
+    c->dwarf.loc[R14] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R14, 0);
+    c->dwarf.loc[R15] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R15, 0);
+    c->dwarf.loc[RIP] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_RIP, 0);
+
+    return 0;
+   }
+  else if (c->sigcontext_format == X86_64_SCF_FREEBSD_SYSCALL)
+   {
+    c->dwarf.loc[RCX] = c->dwarf.loc[R10];
+    /*  rsp_loc = DWARF_LOC(c->dwarf.cfa - 8, 0);       */
+    /*  rbp_loc = c->dwarf.loc[RBP];                    */
+    c->dwarf.loc[RIP] = DWARF_LOC (c->dwarf.cfa, 0);
+    ret = dwarf_get (&c->dwarf, c->dwarf.loc[RIP], &c->dwarf.ip);
+    Debug (1, "Frame Chain [RIP=0x%Lx] = 0x%Lx\n",
+           (unsigned long long) DWARF_GET_LOC (c->dwarf.loc[RIP]),
+           (unsigned long long) c->dwarf.ip);
+    if (ret < 0)
+     {
+       Debug (2, "returning %d\n", ret);
+       return ret;
+     }
+    c->dwarf.cfa += 8;
+    c->dwarf.use_prev_instr = 1;
+    return 1;
+   }
+  else
+    return -UNW_EBADFRAME;
+
+}
+
+#ifndef UNW_REMOTE_ONLY
+HIDDEN void *
+x86_64_r_uc_addr (ucontext_t *uc, int reg)
+{
+  /* NOTE: common_init() in init.h inlines these for fast path access. */
+  void *addr;
+
+  switch (reg)
+    {
+    case UNW_X86_64_R8: addr = &uc->uc_mcontext.mc_r8; break;
+    case UNW_X86_64_R9: addr = &uc->uc_mcontext.mc_r9; break;
+    case UNW_X86_64_R10: addr = &uc->uc_mcontext.mc_r10; break;
+    case UNW_X86_64_R11: addr = &uc->uc_mcontext.mc_r11; break;
+    case UNW_X86_64_R12: addr = &uc->uc_mcontext.mc_r12; break;
+    case UNW_X86_64_R13: addr = &uc->uc_mcontext.mc_r13; break;
+    case UNW_X86_64_R14: addr = &uc->uc_mcontext.mc_r14; break;
+    case UNW_X86_64_R15: addr = &uc->uc_mcontext.mc_r15; break;
+    case UNW_X86_64_RDI: addr = &uc->uc_mcontext.mc_rdi; break;
+    case UNW_X86_64_RSI: addr = &uc->uc_mcontext.mc_rsi; break;
+    case UNW_X86_64_RBP: addr = &uc->uc_mcontext.mc_rbp; break;
+    case UNW_X86_64_RBX: addr = &uc->uc_mcontext.mc_rbx; break;
+    case UNW_X86_64_RDX: addr = &uc->uc_mcontext.mc_rdx; break;
+    case UNW_X86_64_RAX: addr = &uc->uc_mcontext.mc_rax; break;
+    case UNW_X86_64_RCX: addr = &uc->uc_mcontext.mc_rcx; break;
+    case UNW_X86_64_RSP: addr = &uc->uc_mcontext.mc_rsp; break;
+    case UNW_X86_64_RIP: addr = &uc->uc_mcontext.mc_rip; break;
+
+    default:
+      addr = NULL;
+    }
+  return addr;
+}
+
+HIDDEN NORETURN void
+x86_64_sigreturn (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  ucontext_t *uc = (ucontext_t *)(c->sigcontext_addr +
+    offsetof(struct sigframe, sf_uc));
+
+  uc->uc_mcontext.mc_r8 = c->uc->uc_mcontext.mc_r8;
+  uc->uc_mcontext.mc_r9 = c->uc->uc_mcontext.mc_r9;
+  uc->uc_mcontext.mc_r10 = c->uc->uc_mcontext.mc_r10;
+  uc->uc_mcontext.mc_r11 = c->uc->uc_mcontext.mc_r11;
+  uc->uc_mcontext.mc_r12 = c->uc->uc_mcontext.mc_r12;
+  uc->uc_mcontext.mc_r13 = c->uc->uc_mcontext.mc_r13;
+  uc->uc_mcontext.mc_r14 = c->uc->uc_mcontext.mc_r14;
+  uc->uc_mcontext.mc_r15 = c->uc->uc_mcontext.mc_r15;
+  uc->uc_mcontext.mc_rdi = c->uc->uc_mcontext.mc_rdi;
+  uc->uc_mcontext.mc_rsi = c->uc->uc_mcontext.mc_rsi;
+  uc->uc_mcontext.mc_rbp = c->uc->uc_mcontext.mc_rbp;
+  uc->uc_mcontext.mc_rbx = c->uc->uc_mcontext.mc_rbx;
+  uc->uc_mcontext.mc_rdx = c->uc->uc_mcontext.mc_rdx;
+  uc->uc_mcontext.mc_rax = c->uc->uc_mcontext.mc_rax;
+  uc->uc_mcontext.mc_rcx = c->uc->uc_mcontext.mc_rcx;
+  uc->uc_mcontext.mc_rsp = c->uc->uc_mcontext.mc_rsp;
+  uc->uc_mcontext.mc_rip = c->uc->uc_mcontext.mc_rip;
+
+  Debug (8, "resuming at ip=%llx via sigreturn(%p)\n",
+             (unsigned long long) c->dwarf.ip, uc);
+  sigreturn(uc);
+  abort();
+}
+#endif
diff --git a/src/third_party/unwind/dist/src/x86_64/Gos-linux.c b/src/third_party/unwind/dist/src/x86_64/Gos-linux.c
new file mode 100644
index 00000000000..bd142345edd
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/Gos-linux.c
@@ -0,0 +1,156 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002-2003 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "ucontext_i.h"
+
+#include <sys/syscall.h>
+
+HIDDEN void
+tdep_fetch_frame (struct dwarf_cursor *dw, unw_word_t ip, int need_unwind_info)
+{
+  struct cursor *c = (struct cursor *) dw;
+  assert(! need_unwind_info || dw->pi_valid);
+  assert(! need_unwind_info || dw->pi.unwind_info);
+  if (dw->pi_valid
+      && dw->pi.unwind_info
+      && ((struct dwarf_cie_info *) dw->pi.unwind_info)->signal_frame)
+    c->sigcontext_format = X86_64_SCF_LINUX_RT_SIGFRAME;
+  else
+    c->sigcontext_format = X86_64_SCF_NONE;
+
+  Debug(5, "fetch frame ip=0x%lx cfa=0x%lx format=%d\n",
+        dw->ip, dw->cfa, c->sigcontext_format);
+}
+
+HIDDEN int
+tdep_cache_frame (struct dwarf_cursor *dw)
+{
+  struct cursor *c = (struct cursor *) dw;
+
+  Debug(5, "cache frame ip=0x%lx cfa=0x%lx format=%d\n",
+        dw->ip, dw->cfa, c->sigcontext_format);
+  return c->sigcontext_format;
+}
+
+HIDDEN void
+tdep_reuse_frame (struct dwarf_cursor *dw, int frame)
+{
+  struct cursor *c = (struct cursor *) dw;
+  c->sigcontext_format = frame;
+  if (c->sigcontext_format == X86_64_SCF_LINUX_RT_SIGFRAME)
+  {
+    c->frame_info.frame_type = UNW_X86_64_FRAME_SIGRETURN;
+    /* Offset from cfa to ucontext_t in signal frame.  */
+    c->frame_info.cfa_reg_offset = 0;
+    c->sigcontext_addr = dw->cfa;
+  }
+
+  Debug(5, "reuse frame ip=0x%lx cfa=0x%lx format=%d addr=0x%lx offset=%+d\n",
+        dw->ip, dw->cfa, c->sigcontext_format, c->sigcontext_addr,
+        (c->sigcontext_format == X86_64_SCF_LINUX_RT_SIGFRAME
+         ? c->frame_info.cfa_reg_offset : 0));
+}
+
+int
+unw_is_signal_frame (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  return c->sigcontext_format != X86_64_SCF_NONE;
+}
+
+HIDDEN int
+x86_64_handle_signal_frame (unw_cursor_t *cursor)
+{
+#if UNW_DEBUG /* To silence compiler warnings */
+  /* Should not get here because we now use kernel-provided dwarf
+     information for the signal trampoline and dwarf_step() works.
+     Hence unw_step() should never call this function. Maybe
+     restore old non-dwarf signal handling here, but then the
+     gating on unw_is_signal_frame() needs to be removed. */
+  struct cursor *c = (struct cursor *) cursor;
+  Debug(1, "old format signal frame? format=%d addr=0x%lx cfa=0x%lx\n",
+        c->sigcontext_format, c->sigcontext_addr, c->dwarf.cfa);
+#endif
+  return -UNW_EBADFRAME;
+}
+
+#ifndef UNW_REMOTE_ONLY
+HIDDEN void *
+x86_64_r_uc_addr (ucontext_t *uc, int reg)
+{
+  /* NOTE: common_init() in init.h inlines these for fast path access. */
+  void *addr;
+
+  switch (reg)
+    {
+    case UNW_X86_64_R8: addr = &uc->uc_mcontext.gregs[REG_R8]; break;
+    case UNW_X86_64_R9: addr = &uc->uc_mcontext.gregs[REG_R9]; break;
+    case UNW_X86_64_R10: addr = &uc->uc_mcontext.gregs[REG_R10]; break;
+    case UNW_X86_64_R11: addr = &uc->uc_mcontext.gregs[REG_R11]; break;
+    case UNW_X86_64_R12: addr = &uc->uc_mcontext.gregs[REG_R12]; break;
+    case UNW_X86_64_R13: addr = &uc->uc_mcontext.gregs[REG_R13]; break;
+    case UNW_X86_64_R14: addr = &uc->uc_mcontext.gregs[REG_R14]; break;
+    case UNW_X86_64_R15: addr = &uc->uc_mcontext.gregs[REG_R15]; break;
+    case UNW_X86_64_RDI: addr = &uc->uc_mcontext.gregs[REG_RDI]; break;
+    case UNW_X86_64_RSI: addr = &uc->uc_mcontext.gregs[REG_RSI]; break;
+    case UNW_X86_64_RBP: addr = &uc->uc_mcontext.gregs[REG_RBP]; break;
+    case UNW_X86_64_RBX: addr = &uc->uc_mcontext.gregs[REG_RBX]; break;
+    case UNW_X86_64_RDX: addr = &uc->uc_mcontext.gregs[REG_RDX]; break;
+    case UNW_X86_64_RAX: addr = &uc->uc_mcontext.gregs[REG_RAX]; break;
+    case UNW_X86_64_RCX: addr = &uc->uc_mcontext.gregs[REG_RCX]; break;
+    case UNW_X86_64_RSP: addr = &uc->uc_mcontext.gregs[REG_RSP]; break;
+    case UNW_X86_64_RIP: addr = &uc->uc_mcontext.gregs[REG_RIP]; break;
+
+    default:
+      addr = NULL;
+    }
+  return addr;
+}
+
+/* sigreturn() is a no-op on x86_64 glibc.  */
+HIDDEN NORETURN void
+x86_64_sigreturn (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  struct sigcontext *sc = (struct sigcontext *) c->sigcontext_addr;
+  mcontext_t *sc_mcontext = &((ucontext_t*)sc)->uc_mcontext;
+  /* Copy in saved uc - all preserved regs are at the start of sigcontext */
+  memcpy(sc_mcontext, &c->uc->uc_mcontext,
+         DWARF_NUM_PRESERVED_REGS * sizeof(unw_word_t));
+
+  Debug (8, "resuming at ip=%llx via sigreturn(%p)\n",
+             (unsigned long long) c->dwarf.ip, sc);
+  __asm__ __volatile__ ("mov %0, %%rsp;"
+                        "mov %1, %%rax;"
+                        "syscall"
+                        :: "r"(sc), "i"(SYS_rt_sigreturn)
+                        : "memory");
+  abort();
+}
+
+#endif
diff --git a/src/third_party/unwind/dist/src/x86_64/Greg_states_iterate.c b/src/third_party/unwind/dist/src/x86_64/Greg_states_iterate.c
new file mode 100644
index 00000000000..a17dc1b561d
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/Greg_states_iterate.c
@@ -0,0 +1,37 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2003 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+int
+unw_reg_states_iterate (unw_cursor_t *cursor,
+			unw_reg_states_callback cb, void *token)
+{
+  struct cursor *c = (struct cursor *) cursor;
+
+  return dwarf_reg_states_iterate (&c->dwarf, cb, token);
+}
diff --git a/src/third_party/unwind/dist/src/x86_64/Gregs.c b/src/third_party/unwind/dist/src/x86_64/Gregs.c
new file mode 100644
index 00000000000..baf8a24f0b9
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/Gregs.c
@@ -0,0 +1,138 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2004 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+#if 0
+static inline dwarf_loc_t
+linux_scratch_loc (struct cursor *c, unw_regnum_t reg)
+{
+  unw_word_t addr = c->sigcontext_addr;
+
+  switch (c->sigcontext_format)
+    {
+    case X86_64_SCF_NONE:
+      return DWARF_REG_LOC (&c->dwarf, reg);
+
+    case X86_64_SCF_LINUX_RT_SIGFRAME:
+      addr += LINUX_UC_MCONTEXT_OFF;
+      break;
+
+    case X86_64_SCF_FREEBSD_SIGFRAME:
+      addr += FREEBSD_UC_MCONTEXT_OFF;
+      break;
+    }
+
+  return DWARF_REG_LOC (&c->dwarf, reg);
+
+}
+
+HIDDEN dwarf_loc_t
+x86_64_scratch_loc (struct cursor *c, unw_regnum_t reg)
+{
+  if (c->sigcontext_addr)
+    return linux_scratch_loc (c, reg);
+  else
+    return DWARF_REG_LOC (&c->dwarf, reg);
+}
+#endif
+
+HIDDEN int
+tdep_access_reg (struct cursor *c, unw_regnum_t reg, unw_word_t *valp,
+                 int write)
+{
+  dwarf_loc_t loc = DWARF_NULL_LOC;
+  unsigned int mask;
+  int arg_num;
+
+  switch (reg)
+    {
+
+    case UNW_X86_64_RIP:
+      if (write)
+        c->dwarf.ip = *valp;            /* also update the RIP cache */
+      loc = c->dwarf.loc[RIP];
+      break;
+
+    case UNW_X86_64_CFA:
+    case UNW_X86_64_RSP:
+      if (write)
+        return -UNW_EREADONLYREG;
+      *valp = c->dwarf.cfa;
+      return 0;
+
+    case UNW_X86_64_RAX:
+    case UNW_X86_64_RDX:
+      arg_num = reg - UNW_X86_64_RAX;
+      mask = (1 << arg_num);
+      if (write)
+        {
+          c->dwarf.eh_args[arg_num] = *valp;
+          c->dwarf.eh_valid_mask |= mask;
+          return 0;
+        }
+      else if ((c->dwarf.eh_valid_mask & mask) != 0)
+        {
+          *valp = c->dwarf.eh_args[arg_num];
+          return 0;
+        }
+      else
+        loc = c->dwarf.loc[(reg == UNW_X86_64_RAX) ? RAX : RDX];
+      break;
+
+    case UNW_X86_64_RCX: loc = c->dwarf.loc[RCX]; break;
+    case UNW_X86_64_RBX: loc = c->dwarf.loc[RBX]; break;
+
+    case UNW_X86_64_RBP: loc = c->dwarf.loc[RBP]; break;
+    case UNW_X86_64_RSI: loc = c->dwarf.loc[RSI]; break;
+    case UNW_X86_64_RDI: loc = c->dwarf.loc[RDI]; break;
+    case UNW_X86_64_R8: loc = c->dwarf.loc[R8]; break;
+    case UNW_X86_64_R9: loc = c->dwarf.loc[R9]; break;
+    case UNW_X86_64_R10: loc = c->dwarf.loc[R10]; break;
+    case UNW_X86_64_R11: loc = c->dwarf.loc[R11]; break;
+    case UNW_X86_64_R12: loc = c->dwarf.loc[R12]; break;
+    case UNW_X86_64_R13: loc = c->dwarf.loc[R13]; break;
+    case UNW_X86_64_R14: loc = c->dwarf.loc[R14]; break;
+    case UNW_X86_64_R15: loc = c->dwarf.loc[R15]; break;
+
+    default:
+      Debug (1, "bad register number %u\n", reg);
+      return -UNW_EBADREG;
+    }
+
+  if (write)
+    return dwarf_put (&c->dwarf, loc, *valp);
+  else
+    return dwarf_get (&c->dwarf, loc, valp);
+}
+
+HIDDEN int
+tdep_access_fpreg (struct cursor *c, unw_regnum_t reg, unw_fpreg_t *valp,
+                   int write)
+{
+      return -UNW_EBADREG;
+}
diff --git a/src/third_party/unwind/dist/src/x86_64/Gresume.c b/src/third_party/unwind/dist/src/x86_64/Gresume.c
new file mode 100644
index 00000000000..944cdaae192
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/Gresume.c
@@ -0,0 +1,123 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2002-2004 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <stdlib.h>
+
+#include "offsets.h"
+#include "unwind_i.h"
+
+#ifndef UNW_REMOTE_ONLY
+
+HIDDEN inline int
+x86_64_local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  ucontext_t *uc = c->uc;
+
+  /* Ensure c->pi is up-to-date.  On x86-64, it's relatively common to
+     be missing DWARF unwind info.  We don't want to fail in that
+     case, because the frame-chain still would let us do a backtrace
+     at least.  */
+  dwarf_make_proc_info (&c->dwarf);
+
+  if (unlikely (c->sigcontext_addr != X86_64_SCF_NONE))
+    {
+      x86_64_sigreturn(cursor);
+      abort();
+    }
+  else
+    {
+      Debug (8, "resuming at ip=%llx via setcontext()\n",
+             (unsigned long long) c->dwarf.ip);
+      setcontext (uc);
+    }
+  return -UNW_EINVAL;
+}
+
+#endif /* !UNW_REMOTE_ONLY */
+
+/* This routine is responsible for copying the register values in
+   cursor C and establishing them as the current machine state. */
+
+static inline int
+establish_machine_state (struct cursor *c)
+{
+  int (*access_reg) (unw_addr_space_t, unw_regnum_t, unw_word_t *,
+                     int write, void *);
+  int (*access_fpreg) (unw_addr_space_t, unw_regnum_t, unw_fpreg_t *,
+                       int write, void *);
+  unw_addr_space_t as = c->dwarf.as;
+  void *arg = c->dwarf.as_arg;
+  unw_fpreg_t fpval;
+  unw_word_t val;
+  int reg;
+
+  access_reg = as->acc.access_reg;
+  access_fpreg = as->acc.access_fpreg;
+
+  Debug (8, "copying out cursor state\n");
+
+  for (reg = 0; reg <= UNW_REG_LAST; ++reg)
+    {
+      Debug (16, "copying %s %d\n", unw_regname (reg), reg);
+      if (unw_is_fpreg (reg))
+        {
+          if (tdep_access_fpreg (c, reg, &fpval, 0) >= 0)
+            (*access_fpreg) (as, reg, &fpval, 1, arg);
+        }
+      else
+        {
+          if (tdep_access_reg (c, reg, &val, 0) >= 0)
+            (*access_reg) (as, reg, &val, 1, arg);
+        }
+    }
+
+  if (c->dwarf.args_size)
+    {
+      if (tdep_access_reg (c, UNW_X86_64_RSP, &val, 0) >= 0)
+        {
+          val += c->dwarf.args_size;
+          (*access_reg) (as, UNW_X86_64_RSP, &val, 1, arg);
+        }
+    }
+  return 0;
+}
+
+int
+unw_resume (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  int ret;
+
+  Debug (1, "(cursor=%p)\n", c);
+
+  if ((ret = establish_machine_state (c)) < 0)
+    return ret;
+
+  return (*c->dwarf.as->acc.resume) (c->dwarf.as, (unw_cursor_t *) c,
+                                     c->dwarf.as_arg);
+}
diff --git a/src/third_party/unwind/dist/src/x86_64/Gstash_frame.c b/src/third_party/unwind/dist/src/x86_64/Gstash_frame.c
new file mode 100644
index 00000000000..2c7bc312e28
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/Gstash_frame.c
@@ -0,0 +1,119 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2010, 2011 by FERMI NATIONAL ACCELERATOR LABORATORY
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "ucontext_i.h"
+
+HIDDEN void
+tdep_stash_frame (struct dwarf_cursor *d, struct dwarf_reg_state *rs)
+{
+  struct cursor *c = (struct cursor *) dwarf_to_cursor (d);
+  unw_tdep_frame_t *f = &c->frame_info;
+
+  Debug (4, "ip=0x%lx cfa=0x%lx type %d cfa [where=%d val=%ld] cfaoff=%ld"
+         " ra=0x%lx rbp [where=%d val=%ld @0x%lx] rsp [where=%d val=%ld @0x%lx]\n",
+         d->ip, d->cfa, f->frame_type,
+         rs->reg.where[DWARF_CFA_REG_COLUMN],
+         rs->reg.val[DWARF_CFA_REG_COLUMN],
+         rs->reg.val[DWARF_CFA_OFF_COLUMN],
+         DWARF_GET_LOC(d->loc[rs->ret_addr_column]),
+         rs->reg.where[RBP], rs->reg.val[RBP], DWARF_GET_LOC(d->loc[RBP]),
+         rs->reg.where[RSP], rs->reg.val[RSP], DWARF_GET_LOC(d->loc[RSP]));
+
+  if (rs->reg.where[DWARF_CFA_REG_COLUMN] == DWARF_WHERE_EXPR &&
+    rs->reg.where[RBP] == DWARF_WHERE_EXPR) {
+    /* Check for GCC generated alignment frame for rsp.  A simple
+     * def_cfa_expr that loads a constant offset from rbp, where the
+     * addres of the rip was pushed on the stack */
+    unw_word_t cfa_addr = rs->reg.val[DWARF_CFA_REG_COLUMN];
+    unw_word_t rbp_addr = rs->reg.val[RBP];
+    unw_word_t cfa_offset;
+
+    int ret = dwarf_stack_aligned(d, cfa_addr, rbp_addr, &cfa_offset);
+    if (ret) {
+      f->frame_type = UNW_X86_64_FRAME_ALIGNED;
+      f->cfa_reg_offset = cfa_offset;
+      f->cfa_reg_rsp = 0;
+    }
+  }
+
+  /* A standard frame is defined as:
+      - CFA is register-relative offset off RBP or RSP;
+      - Return address is saved at CFA-8;
+      - RBP is unsaved or saved at CFA+offset, offset != -1;
+      - RSP is unsaved or saved at CFA+offset, offset != -1.  */
+  if (f->frame_type == UNW_X86_64_FRAME_OTHER
+      && (rs->reg.where[DWARF_CFA_REG_COLUMN] == DWARF_WHERE_REG)
+      && (rs->reg.val[DWARF_CFA_REG_COLUMN] == RBP
+          || rs->reg.val[DWARF_CFA_REG_COLUMN] == RSP)
+      && labs((long) rs->reg.val[DWARF_CFA_OFF_COLUMN]) < (1 << 28)
+      && DWARF_GET_LOC(d->loc[rs->ret_addr_column]) == d->cfa-8
+      && (rs->reg.where[RBP] == DWARF_WHERE_UNDEF
+          || rs->reg.where[RBP] == DWARF_WHERE_SAME
+          || (rs->reg.where[RBP] == DWARF_WHERE_CFAREL
+              && labs((long) rs->reg.val[RBP]) < (1 << 14)
+              && rs->reg.val[RBP]+1 != 0))
+      && (rs->reg.where[RSP] == DWARF_WHERE_UNDEF
+          || rs->reg.where[RSP] == DWARF_WHERE_SAME
+          || (rs->reg.where[RSP] == DWARF_WHERE_CFAREL
+              && labs((long) rs->reg.val[RSP]) < (1 << 14)
+              && rs->reg.val[RSP]+1 != 0)))
+  {
+    /* Save information for a standard frame. */
+    f->frame_type = UNW_X86_64_FRAME_STANDARD;
+    f->cfa_reg_rsp = (rs->reg.val[DWARF_CFA_REG_COLUMN] == RSP);
+    f->cfa_reg_offset = rs->reg.val[DWARF_CFA_OFF_COLUMN];
+    if (rs->reg.where[RBP] == DWARF_WHERE_CFAREL)
+      f->rbp_cfa_offset = rs->reg.val[RBP];
+    if (rs->reg.where[RSP] == DWARF_WHERE_CFAREL)
+      f->rsp_cfa_offset = rs->reg.val[RSP];
+    Debug (4, " standard frame\n");
+  }
+
+  /* Signal frame was detected via augmentation in tdep_fetch_frame()  */
+  else if (f->frame_type == UNW_X86_64_FRAME_SIGRETURN)
+  {
+    /* Later we are going to fish out {RBP,RSP,RIP} from sigcontext via
+       their ucontext_t offsets.  Confirm DWARF info agrees with the
+       offsets we expect.  */
+
+#ifndef NDEBUG
+    const unw_word_t uc = c->sigcontext_addr;
+
+    assert (DWARF_GET_LOC(d->loc[RIP]) - uc == UC_MCONTEXT_GREGS_RIP);
+    assert (DWARF_GET_LOC(d->loc[RBP]) - uc == UC_MCONTEXT_GREGS_RBP);
+    assert (DWARF_GET_LOC(d->loc[RSP]) - uc == UC_MCONTEXT_GREGS_RSP);
+#endif
+
+    Debug (4, " sigreturn frame\n");
+  }
+
+  else if (f->frame_type == UNW_X86_64_FRAME_ALIGNED) {
+    Debug (4, " aligned frame, offset %li\n", f->cfa_reg_offset);
+  }
+
+  /* PLT and guessed RBP-walked frames are handled in unw_step(). */
+  else
+    Debug (4, " unusual frame\n");
+}
diff --git a/src/third_party/unwind/dist/src/x86_64/Gstep.c b/src/third_party/unwind/dist/src/x86_64/Gstep.c
new file mode 100644
index 00000000000..10498170ac7
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/Gstep.c
@@ -0,0 +1,227 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include <signal.h>
+
+/* Recognise PLT entries such as:
+     3bdf0: ff 25 e2 49 13 00 jmpq   *0x1349e2(%rip)
+     3bdf6: 68 ae 03 00 00    pushq  $0x3ae
+     3bdfb: e9 00 c5 ff ff    jmpq   38300 <_init+0x18> */
+static int
+is_plt_entry (struct dwarf_cursor *c)
+{
+  unw_word_t w0, w1;
+  unw_accessors_t *a;
+  int ret;
+
+  a = unw_get_accessors_int (c->as);
+  if ((ret = (*a->access_mem) (c->as, c->ip, &w0, 0, c->as_arg)) < 0
+      || (ret = (*a->access_mem) (c->as, c->ip + 8, &w1, 0, c->as_arg)) < 0)
+    return 0;
+
+  ret = (((w0 & 0xffff) == 0x25ff)
+         && (((w0 >> 48) & 0xff) == 0x68)
+         && (((w1 >> 24) & 0xff) == 0xe9));
+
+  Debug (14, "ip=0x%lx => 0x%016lx 0x%016lx, ret = %d\n", c->ip, w0, w1, ret);
+  return ret;
+}
+
+int
+unw_step (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  int ret, i;
+
+#if CONSERVATIVE_CHECKS
+  int val = c->validate;
+  c->validate = 1;
+#endif
+
+  Debug (1, "(cursor=%p, ip=0x%016lx, cfa=0x%016lx)\n",
+         c, c->dwarf.ip, c->dwarf.cfa);
+
+  /* Try DWARF-based unwinding... */
+  c->sigcontext_format = X86_64_SCF_NONE;
+  ret = dwarf_step (&c->dwarf);
+
+#if CONSERVATIVE_CHECKS
+  c->validate = val;
+#endif
+
+  if (ret < 0 && ret != -UNW_ENOINFO)
+    {
+      Debug (2, "returning %d\n", ret);
+      return ret;
+    }
+
+  if (likely (ret >= 0))
+    {
+      /* x86_64 ABI specifies that end of call-chain is marked with a
+         NULL RBP or undefined return address  */
+      if (DWARF_IS_NULL_LOC (c->dwarf.loc[RBP]))
+          {
+            c->dwarf.ip = 0;
+            ret = 0;
+          }
+    }
+  else
+    {
+      /* DWARF failed.  There isn't much of a usable frame-chain on x86-64,
+         but we do need to handle two special-cases:
+
+          (i) signal trampoline: Old kernels and older libcs don't
+              export the vDSO needed to get proper unwind info for the
+              trampoline.  Recognize that case by looking at the code
+              and filling in things by hand.
+
+          (ii) PLT (shared-library) call-stubs: PLT stubs are invoked
+              via CALLQ.  Try this for all non-signal trampoline
+              code.  */
+
+      unw_word_t prev_ip = c->dwarf.ip, prev_cfa = c->dwarf.cfa;
+      struct dwarf_loc rbp_loc, rsp_loc, rip_loc;
+
+      /* We could get here because of missing/bad unwind information.
+         Validate all addresses before dereferencing. */
+      c->validate = 1;
+
+      Debug (13, "dwarf_step() failed (ret=%d), trying frame-chain\n", ret);
+
+      if (unw_is_signal_frame (cursor) > 0)
+        {
+          ret = x86_64_handle_signal_frame(cursor);
+          if (ret < 0)
+            {
+              Debug (2, "returning 0\n");
+              return 0;
+            }
+        }
+      else if (is_plt_entry (&c->dwarf))
+        {
+          /* Like regular frame, CFA = RSP+8, RA = [CFA-8], no regs saved. */
+          Debug (2, "found plt entry\n");
+          c->frame_info.cfa_reg_offset = 8;
+          c->frame_info.cfa_reg_rsp = -1;
+          c->frame_info.frame_type = UNW_X86_64_FRAME_STANDARD;
+          c->dwarf.loc[RIP] = DWARF_LOC (c->dwarf.cfa, 0);
+          c->dwarf.cfa += 8;
+        }
+      else if (DWARF_IS_NULL_LOC (c->dwarf.loc[RBP]))
+        {
+          for (i = 0; i < DWARF_NUM_PRESERVED_REGS; ++i)
+            c->dwarf.loc[i] = DWARF_NULL_LOC;
+        }
+      else
+        {
+          unw_word_t rbp;
+
+          ret = dwarf_get (&c->dwarf, c->dwarf.loc[RBP], &rbp);
+          if (ret < 0)
+            {
+              Debug (2, "returning %d [RBP=0x%lx]\n", ret,
+                     DWARF_GET_LOC (c->dwarf.loc[RBP]));
+              return ret;
+            }
+
+          if (!rbp)
+            {
+              /* Looks like we may have reached the end of the call-chain.  */
+              rbp_loc = DWARF_NULL_LOC;
+              rsp_loc = DWARF_NULL_LOC;
+              rip_loc = DWARF_NULL_LOC;
+            }
+          else
+            {
+              unw_word_t rbp1 = 0;
+              rbp_loc = DWARF_LOC(rbp, 0);
+              rsp_loc = DWARF_NULL_LOC;
+              rip_loc = DWARF_LOC (rbp + 8, 0);
+              ret = dwarf_get (&c->dwarf, rbp_loc, &rbp1);
+              Debug (1, "[RBP=0x%lx] = 0x%lx (cfa = 0x%lx) -> 0x%lx\n",
+                     (unsigned long) DWARF_GET_LOC (c->dwarf.loc[RBP]),
+                     rbp, c->dwarf.cfa, rbp1);
+
+              /* Heuristic to determine incorrect guess.  For RBP to be a
+                 valid frame it needs to be above current CFA, but don't
+                 let it go more than a little.  Note that we can't deduce
+                 anything about new RBP (rbp1) since it may not be a frame
+                 pointer in the frame above.  Just check we get the value. */
+              if (ret < 0
+                  || rbp < c->dwarf.cfa
+                  || (rbp - c->dwarf.cfa) > 0x4000)
+                {
+                  rip_loc = DWARF_NULL_LOC;
+                  rbp_loc = DWARF_NULL_LOC;
+                }
+
+              c->frame_info.frame_type = UNW_X86_64_FRAME_GUESSED;
+              c->frame_info.cfa_reg_rsp = 0;
+              c->frame_info.cfa_reg_offset = 16;
+              c->frame_info.rbp_cfa_offset = -16;
+              c->dwarf.cfa += 16;
+            }
+
+          /* Mark all registers unsaved */
+          for (i = 0; i < DWARF_NUM_PRESERVED_REGS; ++i)
+            c->dwarf.loc[i] = DWARF_NULL_LOC;
+
+          c->dwarf.loc[RBP] = rbp_loc;
+          c->dwarf.loc[RSP] = rsp_loc;
+          c->dwarf.loc[RIP] = rip_loc;
+          c->dwarf.use_prev_instr = 1;
+        }
+
+      if (DWARF_IS_NULL_LOC (c->dwarf.loc[RBP]))
+        {
+          ret = 0;
+          Debug (2, "NULL %%rbp loc, returning %d\n", ret);
+          return ret;
+        }
+      if (!DWARF_IS_NULL_LOC (c->dwarf.loc[RIP]))
+        {
+          ret = dwarf_get (&c->dwarf, c->dwarf.loc[RIP], &c->dwarf.ip);
+          Debug (1, "Frame Chain [RIP=0x%Lx] = 0x%Lx\n",
+                     (unsigned long long) DWARF_GET_LOC (c->dwarf.loc[RIP]),
+                     (unsigned long long) c->dwarf.ip);
+          if (ret < 0)
+            {
+              Debug (2, "returning %d\n", ret);
+              return ret;
+            }
+          ret = 1;
+        }
+      else
+        c->dwarf.ip = 0;
+
+      if (c->dwarf.ip == prev_ip && c->dwarf.cfa == prev_cfa)
+        return -UNW_EBADFRAME;
+    }
+  Debug (2, "returning %d\n", ret);
+  return ret;
+}
diff --git a/src/third_party/unwind/dist/src/x86_64/Gtrace.c b/src/third_party/unwind/dist/src/x86_64/Gtrace.c
new file mode 100644
index 00000000000..741227105e1
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/Gtrace.c
@@ -0,0 +1,551 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2010, 2011 by FERMI NATIONAL ACCELERATOR LABORATORY
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "ucontext_i.h"
+#include <signal.h>
+#include <limits.h>
+
+#pragma weak pthread_once
+#pragma weak pthread_key_create
+#pragma weak pthread_getspecific
+#pragma weak pthread_setspecific
+
+/* Initial hash table size. Table expands by 2 bits (times four). */
+#define HASH_MIN_BITS 14
+
+typedef struct
+{
+  unw_tdep_frame_t *frames;
+  size_t log_size;
+  size_t used;
+  size_t dtor_count;  /* Counts how many times our destructor has already
+                         been called. */
+} unw_trace_cache_t;
+
+static const unw_tdep_frame_t empty_frame = { 0, UNW_X86_64_FRAME_OTHER, -1, -1, 0, -1, -1 };
+static define_lock (trace_init_lock);
+static pthread_once_t trace_cache_once = PTHREAD_ONCE_INIT;
+static sig_atomic_t trace_cache_once_happen;
+static pthread_key_t trace_cache_key;
+static struct mempool trace_cache_pool;
+static __thread  unw_trace_cache_t *tls_cache;
+static __thread  int tls_cache_destroyed;
+
+/* Free memory for a thread's trace cache. */
+static void
+trace_cache_free (void *arg)
+{
+  unw_trace_cache_t *cache = arg;
+  if (++cache->dtor_count < PTHREAD_DESTRUCTOR_ITERATIONS)
+  {
+    /* Not yet our turn to get destroyed. Re-install ourselves into the key. */
+    pthread_setspecific(trace_cache_key, cache);
+    Debug(5, "delayed freeing cache %p (%zx to go)\n", cache,
+          PTHREAD_DESTRUCTOR_ITERATIONS - cache->dtor_count);
+    return;
+  }
+  tls_cache_destroyed = 1;
+  tls_cache = NULL;
+  munmap (cache->frames, (1u << cache->log_size) * sizeof(unw_tdep_frame_t));
+  mempool_free (&trace_cache_pool, cache);
+  Debug(5, "freed cache %p\n", cache);
+}
+
+/* Initialise frame tracing for threaded use. */
+static void
+trace_cache_init_once (void)
+{
+  pthread_key_create (&trace_cache_key, &trace_cache_free);
+  mempool_init (&trace_cache_pool, sizeof (unw_trace_cache_t), 0);
+  trace_cache_once_happen = 1;
+}
+
+static unw_tdep_frame_t *
+trace_cache_buckets (size_t n)
+{
+  unw_tdep_frame_t *frames;
+  size_t i;
+
+  GET_MEMORY(frames, n * sizeof (unw_tdep_frame_t));
+  if (likely(frames != NULL))
+    for (i = 0; i < n; ++i)
+      frames[i] = empty_frame;
+
+  return frames;
+}
+
+/* Allocate and initialise hash table for frame cache lookups.
+   Returns the cache initialised with (1u << HASH_LOW_BITS) hash
+   buckets, or NULL if there was a memory allocation problem. */
+static unw_trace_cache_t *
+trace_cache_create (void)
+{
+  unw_trace_cache_t *cache;
+
+  if (tls_cache_destroyed)
+  {
+    /* The current thread is in the process of exiting. Don't recreate
+       cache, as we wouldn't have another chance to free it. */
+    Debug(5, "refusing to reallocate cache: "
+             "thread-locals are being deallocated\n");
+    return NULL;
+  }
+
+  if (! (cache = mempool_alloc(&trace_cache_pool)))
+  {
+    Debug(5, "failed to allocate cache\n");
+    return NULL;
+  }
+
+  if (! (cache->frames = trace_cache_buckets(1u << HASH_MIN_BITS)))
+  {
+    Debug(5, "failed to allocate buckets\n");
+    mempool_free(&trace_cache_pool, cache);
+    return NULL;
+  }
+
+  cache->log_size = HASH_MIN_BITS;
+  cache->used = 0;
+  cache->dtor_count = 0;
+  tls_cache_destroyed = 0;  /* Paranoia: should already be 0. */
+  Debug(5, "allocated cache %p\n", cache);
+  return cache;
+}
+
+/* Expand the hash table in the frame cache if possible. This always
+   quadruples the hash size, and clears all previous frame entries. */
+static int
+trace_cache_expand (unw_trace_cache_t *cache)
+{
+  size_t old_size = (1u << cache->log_size);
+  size_t new_log_size = cache->log_size + 2;
+  unw_tdep_frame_t *new_frames = trace_cache_buckets (1u << new_log_size);
+
+  if (unlikely(! new_frames))
+  {
+    Debug(5, "failed to expand cache to 2^%lu buckets\n", new_log_size);
+    return -UNW_ENOMEM;
+  }
+
+  Debug(5, "expanded cache from 2^%lu to 2^%lu buckets\n", cache->log_size, new_log_size);
+  munmap(cache->frames, old_size * sizeof(unw_tdep_frame_t));
+  cache->frames = new_frames;
+  cache->log_size = new_log_size;
+  cache->used = 0;
+  return 0;
+}
+
+static unw_trace_cache_t *
+trace_cache_get_unthreaded (void)
+{
+  unw_trace_cache_t *cache;
+  intrmask_t saved_mask;
+  static unw_trace_cache_t *global_cache = NULL;
+  lock_acquire (&trace_init_lock, saved_mask);
+  if (! global_cache)
+  {
+    mempool_init (&trace_cache_pool, sizeof (unw_trace_cache_t), 0);
+    global_cache = trace_cache_create ();
+  }
+  cache = global_cache;
+  lock_release (&trace_init_lock, saved_mask);
+  Debug(5, "using cache %p\n", cache);
+  return cache;
+}
+
+/* Get the frame cache for the current thread. Create it if there is none. */
+static unw_trace_cache_t *
+trace_cache_get (void)
+{
+  unw_trace_cache_t *cache;
+  if (likely (pthread_once != NULL))
+  {
+    pthread_once(&trace_cache_once, &trace_cache_init_once);
+    if (!trace_cache_once_happen)
+    {
+      return trace_cache_get_unthreaded();
+    }
+    if (! (cache = tls_cache))
+    {
+      cache = trace_cache_create();
+      pthread_setspecific(trace_cache_key, cache);
+      tls_cache = cache;
+    }
+    Debug(5, "using cache %p\n", cache);
+    return cache;
+  }
+  else
+  {
+    return trace_cache_get_unthreaded();
+  }
+}
+
+/* Initialise frame properties for address cache slot F at address
+   RIP using current CFA, RBP and RSP values.  Modifies CURSOR to
+   that location, performs one unw_step(), and fills F with what
+   was discovered about the location.  Returns F.
+
+   FIXME: This probably should tell DWARF handling to never evaluate
+   or use registers other than RBP, RSP and RIP in case there is
+   highly unusual unwind info which uses these creatively. */
+static unw_tdep_frame_t *
+trace_init_addr (unw_tdep_frame_t *f,
+                 unw_cursor_t *cursor,
+                 unw_word_t cfa,
+                 unw_word_t rip,
+                 unw_word_t rbp,
+                 unw_word_t rsp)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  struct dwarf_cursor *d = &c->dwarf;
+  int ret = -UNW_EINVAL;
+
+  /* Initialise frame properties: unknown, not last. */
+  f->virtual_address = rip;
+  f->frame_type = UNW_X86_64_FRAME_OTHER;
+  f->last_frame = 0;
+  f->cfa_reg_rsp = -1;
+  f->cfa_reg_offset = 0;
+  f->rbp_cfa_offset = -1;
+  f->rsp_cfa_offset = -1;
+
+  /* Reinitialise cursor to this instruction - but undo next/prev RIP
+     adjustment because unw_step will redo it - and force RIP, RBP
+     RSP into register locations (=~ ucontext we keep), then set
+     their desired values. Then perform the step. */
+  d->ip = rip + d->use_prev_instr;
+  d->cfa = cfa;
+  d->loc[UNW_X86_64_RIP] = DWARF_REG_LOC (d, UNW_X86_64_RIP);
+  d->loc[UNW_X86_64_RBP] = DWARF_REG_LOC (d, UNW_X86_64_RBP);
+  d->loc[UNW_X86_64_RSP] = DWARF_REG_LOC (d, UNW_X86_64_RSP);
+  c->frame_info = *f;
+
+  if (likely(dwarf_put (d, d->loc[UNW_X86_64_RIP], rip) >= 0)
+      && likely(dwarf_put (d, d->loc[UNW_X86_64_RBP], rbp) >= 0)
+      && likely(dwarf_put (d, d->loc[UNW_X86_64_RSP], rsp) >= 0)
+      && likely((ret = unw_step (cursor)) >= 0))
+    *f = c->frame_info;
+
+  /* If unw_step() stopped voluntarily, remember that, even if it
+     otherwise could not determine anything useful.  This avoids
+     failing trace if we hit frames without unwind info, which is
+     common for the outermost frame (CRT stuff) on many systems.
+     This avoids failing trace in very common circumstances; failing
+     to unw_step() loop wouldn't produce any better result. */
+  if (ret == 0)
+    f->last_frame = -1;
+
+  Debug (3, "frame va %lx type %d last %d cfa %s+%d rbp @ cfa%+d rsp @ cfa%+d\n",
+         f->virtual_address, f->frame_type, f->last_frame,
+         f->cfa_reg_rsp ? "rsp" : "rbp", f->cfa_reg_offset,
+         f->rbp_cfa_offset, f->rsp_cfa_offset);
+
+  return f;
+}
+
+/* Look up and if necessary fill in frame attributes for address RIP
+   in CACHE using current CFA, RBP and RSP values.  Uses CURSOR to
+   perform any unwind steps necessary to fill the cache.  Returns the
+   frame cache slot which describes RIP. */
+static unw_tdep_frame_t *
+trace_lookup (unw_cursor_t *cursor,
+              unw_trace_cache_t *cache,
+              unw_word_t cfa,
+              unw_word_t rip,
+              unw_word_t rbp,
+              unw_word_t rsp)
+{
+  /* First look up for previously cached information using cache as
+     linear probing hash table with probe step of 1.  Majority of
+     lookups should be completed within few steps, but it is very
+     important the hash table does not fill up, or performance falls
+     off the cliff. */
+  uint64_t i, addr;
+  uint64_t cache_size = 1u << cache->log_size;
+  uint64_t slot = ((rip * 0x9e3779b97f4a7c16) >> 43) & (cache_size-1);
+  unw_tdep_frame_t *frame;
+
+  for (i = 0; i < 16; ++i)
+  {
+    frame = &cache->frames[slot];
+    addr = frame->virtual_address;
+
+    /* Return if we found the address. */
+    if (likely(addr == rip))
+    {
+      Debug (4, "found address after %ld steps\n", i);
+      return frame;
+    }
+
+    /* If slot is empty, reuse it. */
+    if (likely(! addr))
+      break;
+
+    /* Linear probe to next slot candidate, step = 1. */
+    if (++slot >= cache_size)
+      slot -= cache_size;
+  }
+
+  /* If we collided after 16 steps, or if the hash is more than half
+     full, force the hash to expand. Fill the selected slot, whether
+     it's free or collides. Note that hash expansion drops previous
+     contents; further lookups will refill the hash. */
+  Debug (4, "updating slot %lu after %ld steps, replacing 0x%lx\n", slot, i, addr);
+  if (unlikely(addr || cache->used >= cache_size / 2))
+  {
+    if (unlikely(trace_cache_expand (cache) < 0))
+      return NULL;
+
+    cache_size = 1u << cache->log_size;
+    slot = ((rip * 0x9e3779b97f4a7c16) >> 43) & (cache_size-1);
+    frame = &cache->frames[slot];
+    addr = frame->virtual_address;
+  }
+
+  if (! addr)
+    ++cache->used;
+
+  return trace_init_addr (frame, cursor, cfa, rip, rbp, rsp);
+}
+
+/* Fast stack backtrace for x86-64.
+
+   This is used by backtrace() implementation to accelerate frequent
+   queries for current stack, without any desire to unwind. It fills
+   BUFFER with the call tree from CURSOR upwards for at most SIZE
+   stack levels. The first frame, backtrace itself, is omitted. When
+   called, SIZE should give the maximum number of entries that can be
+   stored into BUFFER. Uses an internal thread-specific cache to
+   accelerate queries.
+
+   The caller should fall back to a unw_step() loop if this function
+   fails by returning -UNW_ESTOPUNWIND, meaning the routine hit a
+   stack frame that is too complex to be traced in the fast path.
+
+   This function is tuned for clients which only need to walk the
+   stack to get the call tree as fast as possible but without any
+   other details, for example profilers sampling the stack thousands
+   to millions of times per second.  The routine handles the most
+   common x86-64 ABI stack layouts: CFA is RBP or RSP plus/minus
+   constant offset, return address is at CFA-8, and RBP and RSP are
+   either unchanged or saved on stack at constant offset from the CFA;
+   the signal return frame; and frames without unwind info provided
+   they are at the outermost (final) frame or can conservatively be
+   assumed to be frame-pointer based.
+
+   Any other stack layout will cause the routine to give up. There
+   are only a handful of relatively rarely used functions which do
+   not have a stack in the standard form: vfork, longjmp, setcontext
+   and _dl_runtime_profile on common linux systems for example.
+
+   On success BUFFER and *SIZE reflect the trace progress up to *SIZE
+   stack levels or the outermost frame, which ever is less.  It may
+   stop short of outermost frame if unw_step() loop would also do so,
+   e.g. if there is no more unwind information; this is not reported
+   as an error.
+
+   The function returns a negative value for errors, -UNW_ESTOPUNWIND
+   if tracing stopped because of an unusual frame unwind info.  The
+   BUFFER and *SIZE reflect tracing progress up to the error frame.
+
+   Callers of this function would normally look like this:
+
+     unw_cursor_t     cur;
+     unw_context_t    ctx;
+     void             addrs[128];
+     int              depth = 128;
+     int              ret;
+
+     unw_getcontext(&ctx);
+     unw_init_local(&cur, &ctx);
+     if ((ret = unw_tdep_trace(&cur, addrs, &depth)) < 0)
+     {
+       depth = 0;
+       unw_getcontext(&ctx);
+       unw_init_local(&cur, &ctx);
+       while ((ret = unw_step(&cur)) > 0 && depth < 128)
+       {
+         unw_word_t ip;
+         unw_get_reg(&cur, UNW_REG_IP, &ip);
+         addresses[depth++] = (void *) ip;
+       }
+     }
+*/
+HIDDEN int
+tdep_trace (unw_cursor_t *cursor, void **buffer, int *size)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  struct dwarf_cursor *d = &c->dwarf;
+  unw_trace_cache_t *cache;
+  unw_word_t rbp, rsp, rip, cfa;
+  int maxdepth = 0;
+  int depth = 0;
+  int ret;
+
+  /* Check input parametres. */
+  if (unlikely(! cursor || ! buffer || ! size || (maxdepth = *size) <= 0))
+    return -UNW_EINVAL;
+
+  Debug (1, "begin ip 0x%lx cfa 0x%lx\n", d->ip, d->cfa);
+
+  /* Tell core dwarf routines to call back to us. */
+  d->stash_frames = 1;
+
+  /* Determine initial register values. These are direct access safe
+     because we know they come from the initial machine context. */
+  rip = d->ip;
+  rsp = cfa = d->cfa;
+  ACCESS_MEM_FAST(ret, 0, d, DWARF_GET_LOC(d->loc[UNW_X86_64_RBP]), rbp);
+  assert(ret == 0);
+
+  /* Get frame cache. */
+  if (unlikely(! (cache = trace_cache_get())))
+  {
+    Debug (1, "returning %d, cannot get trace cache\n", -UNW_ENOMEM);
+    *size = 0;
+    d->stash_frames = 0;
+    return -UNW_ENOMEM;
+  }
+
+  /* Trace the stack upwards, starting from current RIP.  Adjust
+     the RIP address for previous/next instruction as the main
+     unwinding logic would also do.  We undo this before calling
+     back into unw_step(). */
+  while (depth < maxdepth)
+  {
+    rip -= d->use_prev_instr;
+    Debug (2, "depth %d cfa 0x%lx rip 0x%lx rsp 0x%lx rbp 0x%lx\n",
+           depth, cfa, rip, rsp, rbp);
+
+    /* See if we have this address cached.  If not, evaluate enough of
+       the dwarf unwind information to fill the cache line data, or to
+       decide this frame cannot be handled in fast trace mode.  We
+       cache negative results too to prevent unnecessary dwarf parsing
+       for common failures. */
+    unw_tdep_frame_t *f = trace_lookup (cursor, cache, cfa, rip, rbp, rsp);
+
+    /* If we don't have information for this frame, give up. */
+    if (unlikely(! f))
+    {
+      ret = -UNW_ENOINFO;
+      break;
+    }
+
+    Debug (3, "frame va %lx type %d last %d cfa %s+%d rbp @ cfa%+d rsp @ cfa%+d\n",
+           f->virtual_address, f->frame_type, f->last_frame,
+           f->cfa_reg_rsp ? "rsp" : "rbp", f->cfa_reg_offset,
+           f->rbp_cfa_offset, f->rsp_cfa_offset);
+
+    assert (f->virtual_address == rip);
+
+    /* Stop if this was the last frame.  In particular don't evaluate
+       new register values as it may not be safe - we don't normally
+       run with full validation on, and do not want to - and there's
+       enough bad unwind info floating around that we need to trust
+       what unw_step() previously said, in potentially bogus frames. */
+    if (f->last_frame)
+      break;
+
+    /* Evaluate CFA and registers for the next frame. */
+    switch (f->frame_type)
+    {
+    case UNW_X86_64_FRAME_GUESSED:
+      /* Fall thru to standard processing after forcing validation. */
+      c->validate = 1;
+
+    case UNW_X86_64_FRAME_STANDARD:
+      /* Advance standard traceable frame. */
+      cfa = (f->cfa_reg_rsp ? rsp : rbp) + f->cfa_reg_offset;
+      ACCESS_MEM_FAST(ret, c->validate, d, cfa - 8, rip);
+      if (likely(ret >= 0) && likely(f->rbp_cfa_offset != -1))
+        ACCESS_MEM_FAST(ret, c->validate, d, cfa + f->rbp_cfa_offset, rbp);
+
+      /* Don't bother reading RSP from DWARF, CFA becomes new RSP. */
+      rsp = cfa;
+
+      /* Next frame needs to back up for unwind info lookup. */
+      d->use_prev_instr = 1;
+      break;
+
+    case UNW_X86_64_FRAME_SIGRETURN:
+      cfa = cfa + f->cfa_reg_offset; /* cfa now points to ucontext_t.  */
+
+      ACCESS_MEM_FAST(ret, c->validate, d, cfa + UC_MCONTEXT_GREGS_RIP, rip);
+      if (likely(ret >= 0))
+        ACCESS_MEM_FAST(ret, c->validate, d, cfa + UC_MCONTEXT_GREGS_RBP, rbp);
+      if (likely(ret >= 0))
+        ACCESS_MEM_FAST(ret, c->validate, d, cfa + UC_MCONTEXT_GREGS_RSP, rsp);
+
+      /* Resume stack at signal restoration point. The stack is not
+         necessarily continuous here, especially with sigaltstack(). */
+      cfa = rsp;
+
+      /* Next frame should not back up. */
+      d->use_prev_instr = 0;
+      break;
+
+    case UNW_X86_64_FRAME_ALIGNED:
+      /* Address of RIP was pushed on the stack via a simple
+       * def_cfa_expr - result stack offset stored in cfa_reg_offset */
+      cfa = (f->cfa_reg_rsp ? rsp : rbp) + f->cfa_reg_offset;
+      ACCESS_MEM_FAST(ret, c->validate, d, cfa, cfa);
+      if (likely(ret >= 0))
+        ACCESS_MEM_FAST(ret, c->validate, d, cfa - 8, rip);
+      if (likely(ret >= 0))
+        ACCESS_MEM_FAST(ret, c->validate, d, rbp, rbp);
+
+      /* Don't bother reading RSP from DWARF, CFA becomes new RSP. */
+      rsp = cfa;
+
+      /* Next frame needs to back up for unwind info lookup. */
+      d->use_prev_instr = 1;
+
+      break;
+
+    default:
+      /* We cannot trace through this frame, give up and tell the
+         caller we had to stop.  Data collected so far may still be
+         useful to the caller, so let it know how far we got.  */
+      ret = -UNW_ESTOPUNWIND;
+      break;
+    }
+
+    Debug (4, "new cfa 0x%lx rip 0x%lx rsp 0x%lx rbp 0x%lx\n",
+           cfa, rip, rsp, rbp);
+
+    /* If we failed or ended up somewhere bogus, stop. */
+    if (unlikely(ret < 0 || rip < 0x4000))
+      break;
+
+    /* Record this address in stack trace. We skipped the first address. */
+    buffer[depth++] = (void *) (rip - d->use_prev_instr);
+  }
+
+#if UNW_DEBUG
+  Debug (1, "returning %d, depth %d\n", ret, depth);
+#endif
+  *size = depth;
+  return ret;
+}
diff --git a/src/third_party/unwind/dist/src/x86_64/Lapply_reg_state.c b/src/third_party/unwind/dist/src/x86_64/Lapply_reg_state.c
new file mode 100644
index 00000000000..7ebada480e5
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/Lapply_reg_state.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gapply_reg_state.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/x86_64/Lcreate_addr_space.c b/src/third_party/unwind/dist/src/x86_64/Lcreate_addr_space.c
new file mode 100644
index 00000000000..0f2dc6be901
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/Lcreate_addr_space.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gcreate_addr_space.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/x86_64/Lget_proc_info.c b/src/third_party/unwind/dist/src/x86_64/Lget_proc_info.c
new file mode 100644
index 00000000000..69028b019fc
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/Lget_proc_info.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gget_proc_info.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/x86_64/Lget_save_loc.c b/src/third_party/unwind/dist/src/x86_64/Lget_save_loc.c
new file mode 100644
index 00000000000..9ea048a9076
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/Lget_save_loc.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gget_save_loc.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/x86_64/Lglobal.c b/src/third_party/unwind/dist/src/x86_64/Lglobal.c
new file mode 100644
index 00000000000..8c43a67c0ff
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/Lglobal.c
@@ -0,0 +1,6 @@
+#define UNW_LOCAL_ONLY
+#include "config.h"
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gglobal.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/x86_64/Linit.c b/src/third_party/unwind/dist/src/x86_64/Linit.c
new file mode 100644
index 00000000000..e9abfdd46a3
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/Linit.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/x86_64/Linit_local.c b/src/third_party/unwind/dist/src/x86_64/Linit_local.c
new file mode 100644
index 00000000000..68a1687e854
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/Linit_local.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit_local.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/x86_64/Linit_remote.c b/src/third_party/unwind/dist/src/x86_64/Linit_remote.c
new file mode 100644
index 00000000000..58cb04ab7cd
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/Linit_remote.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Ginit_remote.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/x86_64/Los-freebsd.c b/src/third_party/unwind/dist/src/x86_64/Los-freebsd.c
new file mode 100644
index 00000000000..a75a205df19
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/Los-freebsd.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gos-freebsd.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/x86_64/Los-linux.c b/src/third_party/unwind/dist/src/x86_64/Los-linux.c
new file mode 100644
index 00000000000..3cc18aabcc3
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/Los-linux.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gos-linux.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/x86_64/Lreg_states_iterate.c b/src/third_party/unwind/dist/src/x86_64/Lreg_states_iterate.c
new file mode 100644
index 00000000000..f1eb1e79dcd
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/Lreg_states_iterate.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Greg_states_iterate.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/x86_64/Lregs.c b/src/third_party/unwind/dist/src/x86_64/Lregs.c
new file mode 100644
index 00000000000..2c9c75cd7d9
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/Lregs.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gregs.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/x86_64/Lresume.c b/src/third_party/unwind/dist/src/x86_64/Lresume.c
new file mode 100644
index 00000000000..41a8cf003de
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/Lresume.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gresume.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/x86_64/Lstash_frame.c b/src/third_party/unwind/dist/src/x86_64/Lstash_frame.c
new file mode 100644
index 00000000000..77587803d08
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/Lstash_frame.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gstash_frame.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/x86_64/Lstep.c b/src/third_party/unwind/dist/src/x86_64/Lstep.c
new file mode 100644
index 00000000000..c1ac3c7547f
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/Lstep.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gstep.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/x86_64/Ltrace.c b/src/third_party/unwind/dist/src/x86_64/Ltrace.c
new file mode 100644
index 00000000000..fcd3f239c9e
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/Ltrace.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gtrace.c"
+#endif
diff --git a/src/third_party/unwind/dist/src/x86_64/getcontext.S b/src/third_party/unwind/dist/src/x86_64/getcontext.S
new file mode 100644
index 00000000000..7a8b5664bda
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/getcontext.S
@@ -0,0 +1,134 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 Google, Inc
+	Contributed by Paul Pluzhnikov <ppluzhnikov@google.com>
+   Copyright (C) 2010 Konstantin Belousov <kib@freebsd.org>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "ucontext_i.h"
+
+/*  int _Ux86_64_getcontext (ucontext_t *ucp)
+
+  Saves the machine context in UCP necessary for libunwind.  
+  Unlike the libc implementation, we don't save the signal mask
+  and hence avoid the cost of a system call per unwind.
+  
+*/
+
+	.global _Ux86_64_getcontext
+	.type _Ux86_64_getcontext, @function
+_Ux86_64_getcontext:
+	.cfi_startproc
+
+	/* Callee saved: RBX, RBP, R12-R15  */
+	movq %r12, UC_MCONTEXT_GREGS_R12(%rdi)
+	movq %r13, UC_MCONTEXT_GREGS_R13(%rdi)
+	movq %r14, UC_MCONTEXT_GREGS_R14(%rdi)
+	movq %r15, UC_MCONTEXT_GREGS_R15(%rdi)
+	movq %rbp, UC_MCONTEXT_GREGS_RBP(%rdi)
+	movq %rbx, UC_MCONTEXT_GREGS_RBX(%rdi)
+
+	/* Save argument registers (not strictly needed, but setcontext 
+	   restores them, so don't restore garbage).  */
+	movq %r8,  UC_MCONTEXT_GREGS_R8(%rdi)
+	movq %r9,  UC_MCONTEXT_GREGS_R9(%rdi)
+	movq %rdi, UC_MCONTEXT_GREGS_RDI(%rdi)
+	movq %rsi, UC_MCONTEXT_GREGS_RSI(%rdi)
+	movq %rdx, UC_MCONTEXT_GREGS_RDX(%rdi)
+	movq %rax, UC_MCONTEXT_GREGS_RAX(%rdi)
+	movq %rcx, UC_MCONTEXT_GREGS_RCX(%rdi)
+
+#if defined __linux__
+	/* Save fp state (not needed, except for setcontext not
+	   restoring garbage).  */
+	leaq UC_MCONTEXT_FPREGS_MEM(%rdi),%r8
+	movq %r8, UC_MCONTEXT_FPREGS_PTR(%rdi)
+	fnstenv (%r8)
+	stmxcsr FPREGS_OFFSET_MXCSR(%r8)
+#elif defined __FreeBSD__
+	fxsave UC_MCONTEXT_FPSTATE(%rdi)
+	movq $UC_MCONTEXT_FPOWNED_FPU,UC_MCONTEXT_OWNEDFP(%rdi)
+	movq $UC_MCONTEXT_FPFMT_XMM,UC_MCONTEXT_FPFORMAT(%rdi)
+	/* Save rflags and segment registers, so that sigreturn(2)
+	does not complain. */
+	pushfq
+	.cfi_adjust_cfa_offset 8
+	popq UC_MCONTEXT_RFLAGS(%rdi)
+	.cfi_adjust_cfa_offset -8
+	movl $0, UC_MCONTEXT_FLAGS(%rdi)
+	movw %cs, UC_MCONTEXT_CS(%rdi)
+	movw %ss, UC_MCONTEXT_SS(%rdi)
+#if 0
+	/* Setting the flags to 0 above disables restore of segment
+	   registers from the context */
+	movw %ds, UC_MCONTEXT_DS(%rdi)
+	movw %es, UC_MCONTEXT_ES(%rdi)
+	movw %fs, UC_MCONTEXT_FS(%rdi)
+	movw %gs, UC_MCONTEXT_GS(%rdi)
+#endif
+	movq $UC_MCONTEXT_MC_LEN_VAL, UC_MCONTEXT_MC_LEN(%rdi)
+#else
+#error Port me
+#endif
+
+	leaq 8(%rsp), %rax /* exclude this call.  */
+	movq %rax, UC_MCONTEXT_GREGS_RSP(%rdi)
+
+	movq 0(%rsp), %rax
+	movq %rax, UC_MCONTEXT_GREGS_RIP(%rdi)
+
+	xorq	%rax, %rax
+	retq
+	.cfi_endproc
+	.size _Ux86_64_getcontext, . - _Ux86_64_getcontext
+
+/*  int _Ux86_64_getcontext_trace (ucontext_t *ucp)
+
+  Saves limited machine context in UCP necessary for libunwind.
+  Unlike _Ux86_64_getcontext, saves only the parts needed for
+  fast trace. If fast trace fails, caller will have to get the
+  full context.
+*/
+
+	.global _Ux86_64_getcontext_trace
+	.hidden _Ux86_64_getcontext_trace
+	.type _Ux86_64_getcontext_trace, @function
+_Ux86_64_getcontext_trace:
+	.cfi_startproc
+
+	/* Save only RBP, RBX, RSP, RIP - exclude this call. */
+	movq %rbp, UC_MCONTEXT_GREGS_RBP(%rdi)
+	movq %rbx, UC_MCONTEXT_GREGS_RBX(%rdi)
+
+	leaq 8(%rsp), %rax
+	movq %rax, UC_MCONTEXT_GREGS_RSP(%rdi)
+
+	movq 0(%rsp), %rax
+	movq %rax, UC_MCONTEXT_GREGS_RIP(%rdi)
+
+	xorq	%rax, %rax
+	retq
+	.cfi_endproc
+	.size _Ux86_64_getcontext_trace, . - _Ux86_64_getcontext_trace
+
+      /* We do not need executable stack.  */
+      .section        .note.GNU-stack,"",@progbits
diff --git a/src/third_party/unwind/dist/src/x86_64/init.h b/src/third_party/unwind/dist/src/x86_64/init.h
new file mode 100644
index 00000000000..a7a996f1272
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/init.h
@@ -0,0 +1,89 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+/* Avoid a trip to x86_64_r_uc_addr() for purely local initialisation. */
+#if defined UNW_LOCAL_ONLY && defined __linux
+# define REG_INIT_LOC(c, rlc, ruc) \
+    DWARF_LOC ((unw_word_t) &c->uc->uc_mcontext.gregs[REG_ ## ruc], 0)
+
+#elif defined UNW_LOCAL_ONLY && defined __FreeBSD__
+# define REG_INIT_LOC(c, rlc, ruc) \
+    DWARF_LOC ((unw_word_t) &c->uc->uc_mcontext.mc_ ## rlc, 0)
+
+#else
+# define REG_INIT_LOC(c, rlc, ruc) \
+    DWARF_REG_LOC (&c->dwarf, UNW_X86_64_ ## ruc)
+#endif
+
+static inline int
+common_init (struct cursor *c, unsigned use_prev_instr)
+{
+  int ret;
+
+  c->dwarf.loc[RAX] = REG_INIT_LOC(c, rax, RAX);
+  c->dwarf.loc[RDX] = REG_INIT_LOC(c, rdx, RDX);
+  c->dwarf.loc[RCX] = REG_INIT_LOC(c, rcx, RCX);
+  c->dwarf.loc[RBX] = REG_INIT_LOC(c, rbx, RBX);
+  c->dwarf.loc[RSI] = REG_INIT_LOC(c, rsi, RSI);
+  c->dwarf.loc[RDI] = REG_INIT_LOC(c, rdi, RDI);
+  c->dwarf.loc[RBP] = REG_INIT_LOC(c, rbp, RBP);
+  c->dwarf.loc[RSP] = REG_INIT_LOC(c, rsp, RSP);
+  c->dwarf.loc[R8]  = REG_INIT_LOC(c, r8,  R8);
+  c->dwarf.loc[R9]  = REG_INIT_LOC(c, r9,  R9);
+  c->dwarf.loc[R10] = REG_INIT_LOC(c, r10, R10);
+  c->dwarf.loc[R11] = REG_INIT_LOC(c, r11, R11);
+  c->dwarf.loc[R12] = REG_INIT_LOC(c, r12, R12);
+  c->dwarf.loc[R13] = REG_INIT_LOC(c, r13, R13);
+  c->dwarf.loc[R14] = REG_INIT_LOC(c, r14, R14);
+  c->dwarf.loc[R15] = REG_INIT_LOC(c, r15, R15);
+  c->dwarf.loc[RIP] = REG_INIT_LOC(c, rip, RIP);
+
+  ret = dwarf_get (&c->dwarf, c->dwarf.loc[RIP], &c->dwarf.ip);
+  if (ret < 0)
+    return ret;
+
+  ret = dwarf_get (&c->dwarf, DWARF_REG_LOC (&c->dwarf, UNW_X86_64_RSP),
+                   &c->dwarf.cfa);
+  if (ret < 0)
+    return ret;
+
+  c->sigcontext_format = X86_64_SCF_NONE;
+  c->sigcontext_addr = 0;
+
+  c->dwarf.args_size = 0;
+  c->dwarf.stash_frames = 0;
+  c->dwarf.use_prev_instr = use_prev_instr;
+  c->dwarf.pi_valid = 0;
+  c->dwarf.pi_is_dynamic = 0;
+  c->dwarf.hint = 0;
+  c->dwarf.prev_rs = 0;
+  c->dwarf.eh_valid_mask = 0;
+
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/x86_64/is_fpreg.c b/src/third_party/unwind/dist/src/x86_64/is_fpreg.c
new file mode 100644
index 00000000000..5c036137b63
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/is_fpreg.c
@@ -0,0 +1,38 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (c) 2004-2005 Hewlett-Packard Development Company, L.P.
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "libunwind_i.h"
+
+int
+unw_is_fpreg (int regnum)
+{
+#if 0
+  return ((regnum >= UNW_X86_ST0 && regnum <= UNW_X86_ST7)
+          || (regnum >= UNW_X86_XMM0_lo && regnum <= UNW_X86_XMM7_hi));
+#endif
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/src/x86_64/longjmp.S b/src/third_party/unwind/dist/src/x86_64/longjmp.S
new file mode 100644
index 00000000000..274778fd80f
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/longjmp.S
@@ -0,0 +1,34 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004-2005 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+	.globl _UI_longjmp_cont
+	.type _UI_longjmp_cont, @function
+_UI_longjmp_cont:
+	push %rax		/* push target IP as return address */
+	mov %rdx, %rax		/* set up return-value */
+	retq
+	.size _UI_longjmp_cont, .-_UI_longjmp_cont
+	/* We do not need executable stack.  */
+	.section	.note.GNU-stack,"",@progbits
diff --git a/src/third_party/unwind/dist/src/x86_64/offsets.h b/src/third_party/unwind/dist/src/x86_64/offsets.h
new file mode 100644
index 00000000000..0807960f30c
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/offsets.h
@@ -0,0 +1,3 @@
+/* FreeBSD specific definitions */
+
+#define FREEBSD_UC_MCONTEXT_OFF         0x10
diff --git a/src/third_party/unwind/dist/src/x86_64/regname.c b/src/third_party/unwind/dist/src/x86_64/regname.c
new file mode 100644
index 00000000000..77660af4a2e
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/regname.c
@@ -0,0 +1,56 @@
+/* libunwind - a platform-independent unwind library
+
+        Contributed by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+
+static const char *regname[] =
+  {
+    "RAX",
+    "RDX",
+    "RCX",
+    "RBX",
+    "RSI",
+    "RDI",
+    "RBP",
+    "RSP",
+    "R8",
+    "R9",
+    "R10",
+    "R11",
+    "R12",
+    "R13",
+    "R14",
+    "R15",
+    "RIP",
+   };
+
+const char *
+unw_regname (unw_regnum_t reg)
+{
+  if (reg < (unw_regnum_t) ARRAY_SIZE (regname))
+    return regname[reg];
+  else
+    return "???";
+}
diff --git a/src/third_party/unwind/dist/src/x86_64/setcontext.S b/src/third_party/unwind/dist/src/x86_64/setcontext.S
new file mode 100644
index 00000000000..358217defba
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/setcontext.S
@@ -0,0 +1,83 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2007 Google, Inc
+	Contributed by Arun Sharma <arun.sharma@google.com>
+   Copyright (C) 2010 Konstantin Belousov <kib@freebsd.org>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "ucontext_i.h"
+
+/*  int _Ux86_64_setcontext (const ucontext_t *ucp)
+
+  Restores the machine context provided.
+  Unlike the libc implementation, doesn't clobber %rax
+
+*/
+	.global _Ux86_64_setcontext
+	.type _Ux86_64_setcontext, @function
+
+_Ux86_64_setcontext:
+
+#if defined __linux__
+        /* restore fp state */
+	mov    UC_MCONTEXT_FPREGS_PTR(%rdi),%r8
+	fldenv (%r8)
+	ldmxcsr FPREGS_OFFSET_MXCSR(%r8)
+#elif defined __FreeBSD__
+	/* restore fp state */
+	cmpq $UC_MCONTEXT_FPOWNED_FPU,UC_MCONTEXT_OWNEDFP(%rdi)
+	jne 1f
+	cmpq $UC_MCONTEXT_FPFMT_XMM,UC_MCONTEXT_FPFORMAT(%rdi)
+	jne 1f
+	fxrstor UC_MCONTEXT_FPSTATE(%rdi)
+1:
+#else
+#error Port me
+#endif
+
+	/* restore the rest of the state */
+	mov    UC_MCONTEXT_GREGS_R8(%rdi),%r8
+	mov    UC_MCONTEXT_GREGS_R9(%rdi),%r9
+	mov    UC_MCONTEXT_GREGS_RBX(%rdi),%rbx
+	mov    UC_MCONTEXT_GREGS_RBP(%rdi),%rbp
+	mov    UC_MCONTEXT_GREGS_R12(%rdi),%r12
+	mov    UC_MCONTEXT_GREGS_R13(%rdi),%r13
+	mov    UC_MCONTEXT_GREGS_R14(%rdi),%r14
+	mov    UC_MCONTEXT_GREGS_R15(%rdi),%r15
+	mov    UC_MCONTEXT_GREGS_RSI(%rdi),%rsi
+	mov    UC_MCONTEXT_GREGS_RDX(%rdi),%rdx
+	mov    UC_MCONTEXT_GREGS_RAX(%rdi),%rax
+	mov    UC_MCONTEXT_GREGS_RCX(%rdi),%rcx
+	mov    UC_MCONTEXT_GREGS_RSP(%rdi),%rsp
+
+        /* push the return address on the stack */
+	mov    UC_MCONTEXT_GREGS_RIP(%rdi),%rcx
+	push   %rcx
+
+	mov    UC_MCONTEXT_GREGS_RCX(%rdi),%rcx
+	mov    UC_MCONTEXT_GREGS_RDI(%rdi),%rdi
+	retq
+
+	.size _Ux86_64_setcontext, . - _Ux86_64_setcontext
+
+      /* We do not need executable stack.  */
+      .section        .note.GNU-stack,"",@progbits
diff --git a/src/third_party/unwind/dist/src/x86_64/siglongjmp.S b/src/third_party/unwind/dist/src/x86_64/siglongjmp.S
new file mode 100644
index 00000000000..32489e53a9f
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/siglongjmp.S
@@ -0,0 +1,32 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+	.globl _UI_siglongjmp_cont
+	.type _UI_siglongjmp_cont, @function
+_UI_siglongjmp_cont:
+	retq
+	.size _UI_siglongjmp_cont, . - _UI_siglongjmp_cont
+	/* We do not need executable stack.  */
+	.section	.note.GNU-stack,"",@progbits
diff --git a/src/third_party/unwind/dist/src/x86_64/ucontext_i.h b/src/third_party/unwind/dist/src/x86_64/ucontext_i.h
new file mode 100644
index 00000000000..aded941d053
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/ucontext_i.h
@@ -0,0 +1,82 @@
+/* Copyright (C) 2004 Hewlett-Packard Co.
+     Contributed by David Mosberger-Tang <davidm@hpl.hp.com>.
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#if defined __linux__
+#define UC_MCONTEXT_GREGS_R8    0x28
+#define UC_MCONTEXT_GREGS_R9    0x30
+#define UC_MCONTEXT_GREGS_R10   0x38
+#define UC_MCONTEXT_GREGS_R11   0x40
+#define UC_MCONTEXT_GREGS_R12   0x48
+#define UC_MCONTEXT_GREGS_R13   0x50
+#define UC_MCONTEXT_GREGS_R14   0x58
+#define UC_MCONTEXT_GREGS_R15   0x60
+#define UC_MCONTEXT_GREGS_RDI   0x68
+#define UC_MCONTEXT_GREGS_RSI   0x70
+#define UC_MCONTEXT_GREGS_RBP   0x78
+#define UC_MCONTEXT_GREGS_RBX   0x80
+#define UC_MCONTEXT_GREGS_RDX   0x88
+#define UC_MCONTEXT_GREGS_RAX   0x90
+#define UC_MCONTEXT_GREGS_RCX   0x98
+#define UC_MCONTEXT_GREGS_RSP   0xa0
+#define UC_MCONTEXT_GREGS_RIP   0xa8
+#define UC_MCONTEXT_FPREGS_PTR  0x1a8
+#define UC_MCONTEXT_FPREGS_MEM  0xe0
+#define UC_SIGMASK              0x128
+#define FPREGS_OFFSET_MXCSR     0x18
+#elif defined __FreeBSD__
+#define UC_SIGMASK              0x0
+#define UC_MCONTEXT_GREGS_RDI   0x18
+#define UC_MCONTEXT_GREGS_RSI   0x20
+#define UC_MCONTEXT_GREGS_RDX   0x28
+#define UC_MCONTEXT_GREGS_RCX   0x30
+#define UC_MCONTEXT_GREGS_R8    0x38
+#define UC_MCONTEXT_GREGS_R9    0x40
+#define UC_MCONTEXT_GREGS_RAX   0x48
+#define UC_MCONTEXT_GREGS_RBX   0x50
+#define UC_MCONTEXT_GREGS_RBP   0x58
+#define UC_MCONTEXT_GREGS_R10   0x60
+#define UC_MCONTEXT_GREGS_R11   0x68
+#define UC_MCONTEXT_GREGS_R12   0x70
+#define UC_MCONTEXT_GREGS_R13   0x78
+#define UC_MCONTEXT_GREGS_R14   0x80
+#define UC_MCONTEXT_GREGS_R15   0x88
+#define UC_MCONTEXT_FS          0x94
+#define UC_MCONTEXT_GS          0x96
+#define UC_MCONTEXT_FLAGS       0xa0
+#define UC_MCONTEXT_ES          0xa4
+#define UC_MCONTEXT_DS          0xa6
+#define UC_MCONTEXT_GREGS_RIP   0xb0
+#define UC_MCONTEXT_CS          0xb8
+#define UC_MCONTEXT_RFLAGS      0xc0
+#define UC_MCONTEXT_GREGS_RSP   0xc8
+#define UC_MCONTEXT_SS          0xd0
+#define UC_MCONTEXT_MC_LEN      0xd8
+#define UC_MCONTEXT_FPFORMAT    0xe0
+#define UC_MCONTEXT_OWNEDFP     0xe8
+#define UC_MCONTEXT_FPSTATE     0xf0
+#define UC_MCONTEXT_FPOWNED_FPU 0x20001
+#define UC_MCONTEXT_FPFMT_XMM   0x10002
+#define UC_MCONTEXT_MC_LEN_VAL  0x320
+
+#endif
diff --git a/src/third_party/unwind/dist/src/x86_64/unwind_i.h b/src/third_party/unwind/dist/src/x86_64/unwind_i.h
new file mode 100644
index 00000000000..e95a60ff376
--- /dev/null
+++ b/src/third_party/unwind/dist/src/x86_64/unwind_i.h
@@ -0,0 +1,93 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002, 2005 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef unwind_i_h
+#define unwind_i_h
+
+#include <stdint.h>
+
+#include <libunwind-x86_64.h>
+
+#include "libunwind_i.h"
+#include <sys/ucontext.h>
+
+/* DWARF column numbers for x86_64: */
+#define RAX     0
+#define RDX     1
+#define RCX     2
+#define RBX     3
+#define RSI     4
+#define RDI     5
+#define RBP     6
+#define RSP     7
+#define R8      8
+#define R9      9
+#define R10     10
+#define R11     11
+#define R12     12
+#define R13     13
+#define R14     14
+#define R15     15
+#define RIP     16
+
+#define x86_64_lock                     UNW_OBJ(lock)
+#define x86_64_local_resume             UNW_OBJ(local_resume)
+#define x86_64_local_addr_space_init    UNW_OBJ(local_addr_space_init)
+#define setcontext                      UNW_ARCH_OBJ (setcontext)
+#if 0
+#define x86_64_scratch_loc              UNW_OBJ(scratch_loc)
+#endif
+#define x86_64_r_uc_addr                UNW_OBJ(r_uc_addr)
+#define x86_64_sigreturn                UNW_OBJ(sigreturn)
+
+/* By-pass calls to access_mem() when known to be safe. */
+#ifdef UNW_LOCAL_ONLY
+# undef ACCESS_MEM_FAST
+# define ACCESS_MEM_FAST(ret,validate,cur,addr,to)                     \
+  do {                                                                 \
+    if (unlikely(validate))                                            \
+      (ret) = dwarf_get ((cur), DWARF_MEM_LOC ((cur), (addr)), &(to)); \
+    else                                                               \
+      (ret) = 0, (to) = *(unw_word_t *)(addr);                         \
+  } while (0)
+#endif
+
+extern void x86_64_local_addr_space_init (void);
+extern int x86_64_local_resume (unw_addr_space_t as, unw_cursor_t *cursor,
+                             void *arg);
+extern int setcontext (const ucontext_t *ucp);
+
+#if 0
+extern dwarf_loc_t x86_64_scratch_loc (struct cursor *c, unw_regnum_t reg);
+#endif
+
+extern void *x86_64_r_uc_addr (ucontext_t *uc, int reg);
+extern NORETURN void x86_64_sigreturn (unw_cursor_t *cursor);
+#define x86_64_handle_signal_frame UNW_OBJ(handle_signal_frame)
+extern int x86_64_handle_signal_frame(unw_cursor_t *cursor);
+
+#endif /* unwind_i_h */
diff --git a/src/third_party/unwind/dist/tests/Gia64-test-nat.c b/src/third_party/unwind/dist/tests/Gia64-test-nat.c
new file mode 100644
index 00000000000..89df54e0b0e
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Gia64-test-nat.c
@@ -0,0 +1,626 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004-2005 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* This file tests corner-cases of NaT-bit handling.  */
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <libunwind.h>
+#include "compiler.h"
+
+#ifdef HAVE_SYS_UC_ACCESS_H
+# include <sys/uc_access.h>
+#endif
+
+#include "tdep-ia64/rse.h"
+
+#define NUM_RUNS		1024
+//#define NUM_RUNS		1
+#define MAX_CHECKS		1024
+//#define MAX_CHECKS		2
+#define MAX_VALUES_PER_FUNC	4
+
+#define panic(args...)							  \
+	do { printf (args); ++nerrors; } while (0)
+
+typedef void save_func_t (void *funcs, unsigned long *vals);
+typedef unw_word_t *check_func_t (unw_cursor_t *c, unsigned long *vals);
+
+extern void flushrs (void);
+
+extern save_func_t save_static_to_stacked;
+static check_func_t check_static_to_stacked;
+
+extern save_func_t save_static_to_fr;
+static check_func_t check_static_to_fr;
+
+extern save_func_t save_static_to_br;
+static check_func_t check_static_to_br;
+
+extern save_func_t save_static_to_mem;
+static check_func_t check_static_to_mem;
+
+extern save_func_t save_static_to_mem2;
+static check_func_t check_static_to_mem2;
+
+extern save_func_t save_static_to_mem3;
+static check_func_t check_static_to_mem3;
+
+extern save_func_t save_static_to_mem4;
+static check_func_t check_static_to_mem4;
+
+extern save_func_t save_static_to_mem5;
+static check_func_t check_static_to_mem5;
+
+extern save_func_t save_static_to_scratch;
+static check_func_t check_static_to_scratch;
+
+extern save_func_t rotate_regs;
+static check_func_t check_rotate_regs;
+
+extern save_func_t save_pr;
+static check_func_t check_pr;
+
+static int verbose;
+static int nerrors;
+
+static int num_checks;
+static save_func_t *funcs[MAX_CHECKS + 1];
+static check_func_t *checks[MAX_CHECKS];
+static unw_word_t values[MAX_CHECKS*MAX_VALUES_PER_FUNC];
+
+static struct
+  {
+    save_func_t *func;
+    check_func_t *check;
+  }
+all_funcs[] =
+  {
+    { save_static_to_stacked,	check_static_to_stacked },
+    { save_static_to_fr,	check_static_to_fr },
+    { save_static_to_br,	check_static_to_br },
+    { save_static_to_mem,	check_static_to_mem },
+    { save_static_to_mem2,	check_static_to_mem2 },
+    { save_static_to_mem3,	check_static_to_mem3 },
+    { save_static_to_mem4,	check_static_to_mem4 },
+    { save_static_to_mem5,	check_static_to_mem5 },
+    { save_static_to_scratch,	check_static_to_scratch },
+    { save_pr,			check_pr },
+    { rotate_regs,		check_rotate_regs },
+  };
+
+static unw_word_t
+random_word (void)
+{
+  unw_word_t val = random ();
+
+  if (sizeof (unw_word_t) > 4)
+    val |= ((unw_word_t) random ()) << 32;
+
+  return val;
+}
+
+void
+sighandler (int signal, void *siginfo, void *context)
+{
+  unsigned long *bsp, *arg1;
+  save_func_t **arg0;
+  ucontext_t *uc = context;
+
+#if defined(__linux)
+  {
+    long sof;
+    int sp;
+
+    if (verbose)
+      printf ("sighandler: signal %d sp=%p nat=%08lx pr=%lx\n",
+	      signal, &sp, uc->uc_mcontext.sc_nat, uc->uc_mcontext.sc_pr);
+    sof = uc->uc_mcontext.sc_cfm & 0x7f;
+    bsp = (unsigned long *) rse_skip_regs (uc->uc_mcontext.sc_ar_bsp, -sof);
+  }
+#elif defined(__hpux)
+  if (__uc_get_ar (uc, UNW_IA64_AR_BSP - UNW_IA64_AR, &bsp) != 0)
+    {
+      panic ("%s: reading of ar.bsp failed, errno=%d", __FUNCTION__, errno);
+      return;
+    }
+#endif
+
+  flushrs ();
+  arg0 = (save_func_t **) *bsp;
+  bsp = (unsigned long *) rse_skip_regs ((uint64_t) bsp, 1);
+  arg1 = (unsigned long *) *bsp;
+
+  (*arg0[0]) (arg0 + 1, arg1);
+
+  /* skip over the instruction which triggered sighandler() */
+#if defined(__linux)
+  ++uc->uc_mcontext.sc_ip;
+#elif defined(HAVE_SYS_UC_ACCESS_H)
+  {
+    unsigned long ip;
+
+    if (__uc_get_ip (uc, &ip) != 0)
+      {
+	panic ("%s: reading of ip failed, errno=%d", __FUNCTION__, errno);
+	return;
+      }
+    if (__uc_set_ip (uc, ip) != 0)
+      {
+	panic ("%s: writing of ip failed, errno=%d", __FUNCTION__, errno);
+	return;
+      }
+  }
+#endif
+}
+
+static void
+enable_sighandler (void)
+{
+  struct sigaction act;
+
+  memset (&act, 0, sizeof (act));
+  act.sa_handler = (void (*)(int)) sighandler;
+  act.sa_flags = SA_SIGINFO | SA_NODEFER;
+  if (sigaction (SIGSEGV, &act, NULL) < 0)
+    panic ("sigaction: %s\n", strerror (errno));
+}
+
+static void
+disable_sighandler (void)
+{
+  struct sigaction act;
+
+  memset (&act, 0, sizeof (act));
+  act.sa_handler = SIG_DFL;
+  act.sa_flags = SA_SIGINFO | SA_NODEFER;
+  if (sigaction (SIGSEGV, &act, NULL) < 0)
+    panic ("sigaction: %s\n", strerror (errno));
+}
+
+static unw_word_t *
+check_static_to_stacked (unw_cursor_t *c, unw_word_t *vals)
+{
+  unw_word_t r[4];
+  unw_word_t nat[4];
+  int i, ret;
+
+  if (verbose)
+    printf ("  %s()\n", __FUNCTION__);
+
+  vals -= 4;
+
+  for (i = 0; i < 4; ++i)
+    if ((ret = unw_get_reg (c, UNW_IA64_GR + 4 + i, &r[i])) < 0)
+      panic ("%s: failed to read register r%d, error=%d\n",
+	     __FUNCTION__, 4 + i, ret);
+
+  for (i = 0; i < 4; ++i)
+    if ((ret = unw_get_reg (c, UNW_IA64_NAT + 4 + i, &nat[i])) < 0)
+      panic ("%s: failed to read register nat%d, error=%d\n",
+	     __FUNCTION__, 4 + i, ret);
+
+  for (i = 0; i < 4; ++i)
+    {
+      if (verbose)
+	printf ("    r%d = %c%016lx (expected %c%016lx)\n",
+		4 + i, nat[i] ? '*' : ' ', r[i],
+		(vals[i] & 1) ? '*' : ' ', vals[i]);
+
+      if (vals[i] & 1)
+	{
+	  if (!nat[i])
+	    panic ("%s: r%d not a NaT!\n", __FUNCTION__, 4 + i);
+	}
+      else
+	{
+	  if (nat[i])
+	    panic ("%s: r%d a NaT!\n", __FUNCTION__, 4 + i);
+	  if (r[i] != vals[i])
+	    panic ("%s: r%d=%lx instead of %lx!\n",
+		   __FUNCTION__, 4 + i, r[i], vals[i]);
+	}
+    }
+  return vals;
+}
+
+static unw_word_t *
+check_static_to_fr (unw_cursor_t *c, unw_word_t *vals)
+{
+  unw_word_t r4;
+  unw_word_t nat4;
+  int ret;
+
+  if (verbose)
+    printf ("  %s()\n", __FUNCTION__);
+
+  vals -= 1;
+
+  if ((ret = unw_get_reg (c, UNW_IA64_GR + 4, &r4)) < 0)
+    panic ("%s: failed to read register r4, error=%d\n", __FUNCTION__, ret);
+
+  if ((ret = unw_get_reg (c, UNW_IA64_NAT + 4, &nat4)) < 0)
+    panic ("%s: failed to read register nat4, error=%d\n", __FUNCTION__, ret);
+
+  if (verbose)
+    printf ("    r4 = %c%016lx (expected %c%016lx)\n",
+	    nat4 ? '*' : ' ', r4, (vals[0] & 1) ? '*' : ' ', vals[0]);
+
+  if (vals[0] & 1)
+    {
+      if (!nat4)
+	panic ("%s: r4 not a NaT!\n", __FUNCTION__);
+    }
+  else
+    {
+      if (nat4)
+	panic ("%s: r4 a NaT!\n", __FUNCTION__);
+      if (r4 != vals[0])
+	panic ("%s: r4=%lx instead of %lx!\n", __FUNCTION__, r4, vals[0]);
+    }
+  return vals;
+}
+
+static unw_word_t *
+check_static_to_br (unw_cursor_t *c, unw_word_t *vals)
+{
+  unw_word_t r4, nat4;
+  int ret;
+
+  if (verbose)
+    printf ("  %s()\n", __FUNCTION__);
+
+  vals -= 1;
+
+  if ((ret = unw_get_reg (c, UNW_IA64_GR + 4, &r4)) < 0)
+    panic ("%s: failed to read register r4, error=%d\n", __FUNCTION__, ret);
+
+  if ((ret = unw_get_reg (c, UNW_IA64_NAT + 4, &nat4)) < 0)
+    panic ("%s: failed to read register nat4, error=%d\n", __FUNCTION__, ret);
+
+  if (verbose)
+    printf ("    r4 = %c%016lx (expected %c%016lx)\n",
+	    nat4 ? '*' : ' ', r4, (vals[0] & 1) ? '*' : ' ', vals[0]);
+
+  if (vals[0] & 1)
+    {
+      if (!nat4)
+	panic ("%s: r4 not a NaT!\n", __FUNCTION__);
+    }
+  else
+    {
+      if (nat4)
+	panic ("%s: r4 a NaT!\n", __FUNCTION__);
+      if (r4 != vals[0])
+	panic ("%s: r4=%lx instead of %lx!\n", __FUNCTION__, r4, vals[0]);
+    }
+  return vals;
+}
+
+static unw_word_t *
+check_static_to_mem (unw_cursor_t *c, unw_word_t *vals)
+{
+  unw_word_t r5, nat5;
+  int ret;
+
+  if (verbose)
+    printf ("  %s()\n", __FUNCTION__);
+
+  vals -= 1;
+
+  if ((ret = unw_get_reg (c, UNW_IA64_GR + 5, &r5)) < 0)
+    panic ("%s: failed to read register r5, error=%d\n", __FUNCTION__, ret);
+
+  if ((ret = unw_get_reg (c, UNW_IA64_NAT + 5, &nat5)) < 0)
+    panic ("%s: failed to read register nat5, error=%d\n", __FUNCTION__, ret);
+
+  if (verbose)
+    printf ("    r5 = %c%016lx (expected %c%016lx)\n",
+	    nat5 ? '*' : ' ', r5, (vals[0] & 1) ? '*' : ' ', vals[0]);
+
+  if (vals[0] & 1)
+    {
+      if (!nat5)
+	panic ("%s: r5 not a NaT!\n", __FUNCTION__);
+    }
+  else
+    {
+      if (nat5)
+	panic ("%s: r5 a NaT!\n", __FUNCTION__);
+      if (r5 != vals[0])
+	panic ("%s: r5=%lx instead of %lx!\n", __FUNCTION__, r5, vals[0]);
+    }
+  return vals;
+}
+
+static unw_word_t *
+check_static_to_memN (unw_cursor_t *c, unw_word_t *vals, const char *func)
+{
+  unw_word_t r6, nat6;
+  int ret;
+
+  if (verbose)
+    printf ("  %s()\n", func);
+
+  vals -= 1;
+
+  if ((ret = unw_get_reg (c, UNW_IA64_GR + 6, &r6)) < 0)
+    panic ("%s: failed to read register r6, error=%d\n", __FUNCTION__, ret);
+
+  if ((ret = unw_get_reg (c, UNW_IA64_NAT + 6, &nat6)) < 0)
+    panic ("%s: failed to read register nat6, error=%d\n", __FUNCTION__, ret);
+
+  if (verbose)
+    printf ("    r6 = %c%016lx (expected %c%016lx)\n",
+	    nat6 ? '*' : ' ', r6, (vals[0] & 1) ? '*' : ' ', vals[0]);
+
+  if (vals[0] & 1)
+    {
+      if (!nat6)
+	panic ("%s: r6 not a NaT!\n", __FUNCTION__);
+    }
+  else
+    {
+      if (nat6)
+	panic ("%s: r6 a NaT!\n", __FUNCTION__);
+      if (r6 != vals[0])
+	panic ("%s: r6=%lx instead of %lx!\n", __FUNCTION__, r6, vals[0]);
+    }
+  return vals;
+}
+
+static unw_word_t *
+check_static_to_mem2 (unw_cursor_t *c, unw_word_t *vals)
+{
+  return check_static_to_memN (c, vals, __FUNCTION__);
+}
+
+static unw_word_t *
+check_static_to_mem3 (unw_cursor_t *c, unw_word_t *vals)
+{
+  return check_static_to_memN (c, vals, __FUNCTION__);
+}
+
+static unw_word_t *
+check_static_to_mem4 (unw_cursor_t *c, unw_word_t *vals)
+{
+  return check_static_to_memN (c, vals, __FUNCTION__);
+}
+
+static unw_word_t *
+check_static_to_mem5 (unw_cursor_t *c, unw_word_t *vals)
+{
+  return check_static_to_memN (c, vals, __FUNCTION__);
+}
+
+static unw_word_t *
+check_static_to_scratch (unw_cursor_t *c, unw_word_t *vals)
+{
+  unw_word_t r[4], nat[4], ec, expected;
+  unw_fpreg_t f4;
+  int i, ret;
+
+  if (verbose)
+    printf ("  %s()\n", __FUNCTION__);
+
+  vals -= 4;
+
+  while (!unw_is_signal_frame (c))
+    if ((ret = unw_step (c)) < 0)
+      panic ("%s: unw_step (ret=%d): Failed to skip over signal handler\n",
+	     __FUNCTION__, ret);
+  if ((ret = unw_step (c)) < 0)
+    panic ("%s: unw_step (ret=%d): Failed to skip over signal handler\n",
+	   __FUNCTION__, ret);
+
+  for (i = 0; i < 4; ++i)
+    if ((ret = unw_get_reg (c, UNW_IA64_GR + 4 + i, &r[i])) < 0)
+      panic ("%s: failed to read register r%d, error=%d\n",
+	     __FUNCTION__, 4 + i, ret);
+
+  for (i = 0; i < 4; ++i)
+    if ((ret = unw_get_reg (c, UNW_IA64_NAT + 4 + i, &nat[i])) < 0)
+      panic ("%s: failed to read register nat%d, error=%d\n",
+	     __FUNCTION__, 4 + i, ret);
+
+  for (i = 0; i < 4; ++i)
+    {
+      if (verbose)
+	printf ("    r%d = %c%016lx (expected %c%016lx)\n",
+		4 + i, nat[i] ? '*' : ' ', r[i],
+		(vals[i] & 1) ? '*' : ' ', vals[i]);
+
+      if (vals[i] & 1)
+	{
+	  if (!nat[i])
+	    panic ("%s: r%d not a NaT!\n", __FUNCTION__, 4 + i);
+	}
+      else
+	{
+	  if (nat[i])
+	    panic ("%s: r%d a NaT!\n", __FUNCTION__, 4 + i);
+	  if (r[i] != vals[i])
+	    panic ("%s: r%d=%lx instead of %lx!\n",
+		   __FUNCTION__, 4 + i, r[i], vals[i]);
+	}
+    }
+  if ((ret = unw_get_fpreg (c, UNW_IA64_FR + 4, &f4)) < 0)
+    panic ("%s: failed to read f4, error=%d\n", __FUNCTION__, ret);
+
+  /* These tests are little-endian specific: */
+  if (nat[0])
+    {
+      if (f4.raw.bits[0] != 0 || f4.raw.bits[1] != 0x1fffe)
+	panic ("%s: f4=%016lx.%016lx instead of NaTVal!\n",
+	       __FUNCTION__, f4.raw.bits[1], f4.raw.bits[0]);
+    }
+  else
+    {
+      if (f4.raw.bits[0] != r[0] || f4.raw.bits[1] != 0x1003e)
+	panic ("%s: f4=%016lx.%016lx instead of %lx!\n",
+	       __FUNCTION__, f4.raw.bits[1], f4.raw.bits[0], r[0]);
+    }
+
+  if ((unw_get_reg (c, UNW_IA64_AR_EC, &ec)) < 0)
+    panic ("%s: failed to read register ar.ec, error=%d\n", __FUNCTION__, ret);
+
+  expected = vals[0] & 0x3f;
+  if (ec != expected)
+    panic ("%s: ar.ec=%016lx instead of %016lx!\n",
+	   __FUNCTION__, ec, expected);
+
+  return vals;
+}
+
+static unw_word_t *
+check_pr (unw_cursor_t *c, unw_word_t *vals)
+{
+  unw_word_t pr, expected;
+  int ret;
+# define BIT(n) ((unw_word_t) 1 << (n))
+# define DONTCARE (BIT( 6) | BIT( 7) | BIT( 8) | BIT( 9) | BIT(10) \
+		 | BIT(11) | BIT(12) | BIT(13) | BIT(14) | BIT(15))
+
+  if (verbose)
+    printf ("  %s()\n", __FUNCTION__);
+
+  vals -= 1;
+
+  if ((ret = unw_get_reg (c, UNW_IA64_PR, &pr)) < 0)
+    panic ("%s: failed to read register pr, error=%d\n", __FUNCTION__, ret);
+
+  pr &= ~DONTCARE;
+  expected = (vals[0] & ~DONTCARE) | 1;
+
+  if (verbose)
+    printf ("    pr = %016lx (expected %016lx)\n", pr, expected);
+
+  if (pr != expected)
+    panic ("%s: pr=%lx instead of %lx!\n", __FUNCTION__, pr, expected);
+
+  if ((ret = unw_set_reg (c, UNW_IA64_PR, vals[0])) < 0)
+    panic ("%s: failed to write register pr, error=%d\n", __FUNCTION__, ret);
+
+  if ((ret = unw_get_reg (c, UNW_IA64_PR, &pr)) < 0)
+    panic ("%s: failed to read register pr, error=%d\n", __FUNCTION__, ret);
+
+  if (pr != vals[0])
+    panic ("%s: secondary pr=%lx instead of %lx!\n",
+	   __FUNCTION__, pr, vals[0]);
+  return vals;
+}
+
+static unw_word_t *
+check_rotate_regs (unw_cursor_t *c, unw_word_t *vals)
+{
+  if (verbose)
+    printf ("  %s()\n", __FUNCTION__);
+  return check_pr (c, vals - 1);
+}
+
+static void
+start_checks (void *funcs, unsigned long *vals)
+{
+  unw_context_t uc;
+  unw_cursor_t c;
+  int i, ret;
+
+  disable_sighandler ();
+
+  unw_getcontext (&uc);
+
+  if ((ret = unw_init_local (&c, &uc)) < 0)
+    panic ("%s: unw_init_local (ret=%d)\n", __FUNCTION__, ret);
+
+  if ((ret = unw_step (&c)) < 0)
+    panic ("%s: unw_step (ret=%d)\n", __FUNCTION__, ret);
+
+  for (i = 0; i < num_checks; ++i)
+    {
+      vals = (*checks[num_checks - 1 - i]) (&c, vals);
+
+      if ((ret = unw_step (&c)) < 0)
+	panic ("%s: unw_step (ret=%d)\n", __FUNCTION__, ret);
+    }
+}
+
+static void
+run_check (int test)
+{
+  int index, i;
+
+  if (test == 1)
+    /* Make first test always go the full depth... */
+    num_checks = MAX_CHECKS;
+  else
+    num_checks = (random () % MAX_CHECKS) + 1;
+
+  for (i = 0; i < num_checks * MAX_VALUES_PER_FUNC; ++i)
+    values[i] = random_word ();
+
+  for (i = 0; i < num_checks; ++i)
+    {
+      if (test == 1)
+	/* Make first test once go through each test... */
+	index = i % (int) ARRAY_SIZE (all_funcs);
+      else
+	index = random () % (int) ARRAY_SIZE (all_funcs);
+      funcs[i] = all_funcs[index].func;
+      checks[i] = all_funcs[index].check;
+    }
+
+  funcs[num_checks] = start_checks;
+
+  enable_sighandler ();
+  (*funcs[0]) (funcs + 1, values);
+}
+
+int
+main (int argc, char **argv)
+{
+  int i;
+
+  if (argc > 1)
+    verbose = 1;
+
+  for (i = 0; i < NUM_RUNS; ++i)
+    {
+      if (verbose)
+	printf ("Run %d\n", i + 1);
+      run_check (i + 1);
+    }
+
+  if (nerrors > 0)
+    {
+      fprintf (stderr, "FAILURE: detected %d errors\n", nerrors);
+      exit (-1);
+    }
+  if (verbose)
+    printf ("SUCCESS.\n");
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/tests/Gia64-test-rbs.c b/src/third_party/unwind/dist/tests/Gia64-test-rbs.c
new file mode 100644
index 00000000000..2181e70fd30
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Gia64-test-rbs.c
@@ -0,0 +1,193 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* This file tests corner-cases of unwinding across multiple stacks.
+   In particular, it verifies that the extreme case with a frame of 96
+   stacked registers that are all backed up by separate stacks works
+   as expected.  */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <libunwind.h>
+#include "compiler.h"
+
+#include "ia64-test-rbs.h"
+
+#define panic(args...)							  \
+	do { fprintf (stderr, args); ++nerrors; return -9999; } while (0)
+
+/* The loadrs field in ar.rsc is 14 bits wide, which limits all ia64
+   implementations to at most 2048 physical stacked registers
+   (actually, slightly less than that, because loadrs also counts RNaT
+   slots).  Since we can dirty 93 stacked registers per recursion, we
+   need to recurse RECURSION_DEPTH times to ensure all physical
+   stacked registers are in use. */
+#define MAX_PHYS_STACKED	2048
+#define RECURSION_DEPTH		((MAX_PHYS_STACKED + 92) / 93)
+
+typedef int spill_func_t (long iteration, int (*next_func[])());
+
+extern int loadup (long iteration, int *values, int (*next_func[])());
+extern char resumption_point_label;
+
+#define DCL(n) \
+ extern int rbs_spill_##n (long iteration, int (*next_func[])())
+	           DCL(2);  DCL(3);  DCL(4);  DCL(5);  DCL(6);  DCL(7);
+  DCL(8);  DCL(9); DCL(10); DCL(11); DCL(12); DCL(13); DCL(14); DCL(15);
+ DCL(16); DCL(17); DCL(18); DCL(19); DCL(20); DCL(21); DCL(22); DCL(23);
+ DCL(24); DCL(25); DCL(26); DCL(27); DCL(28); DCL(29); DCL(30); DCL(31);
+ DCL(32); DCL(33); DCL(34); DCL(35); DCL(36); DCL(37); DCL(38); DCL(39);
+ DCL(40); DCL(41); DCL(42); DCL(43); DCL(44); DCL(45); DCL(46); DCL(47);
+ DCL(48); DCL(49); DCL(50); DCL(51); DCL(52); DCL(53); DCL(54); DCL(55);
+ DCL(56); DCL(57); DCL(58); DCL(59); DCL(60); DCL(61); DCL(62); DCL(63);
+ DCL(64); DCL(65); DCL(66); DCL(67); DCL(68); DCL(69); DCL(70); DCL(71);
+ DCL(72); DCL(73); DCL(74); DCL(75); DCL(76); DCL(77); DCL(78); DCL(79);
+ DCL(80); DCL(81); DCL(82); DCL(83); DCL(84); DCL(85); DCL(86); DCL(87);
+ DCL(88); DCL(89); DCL(90); DCL(91); DCL(92); DCL(93); DCL(94);
+
+#define SPL(n)  rbs_spill_##n
+spill_func_t *spill_funcs[] =
+  {
+	            SPL(2),   SPL(3),  SPL(4),  SPL(5),  SPL(6),  SPL(7),
+     SPL(8),  SPL(9), SPL(10), SPL(11), SPL(12), SPL(13), SPL(14), SPL(15),
+    SPL(16), SPL(17), SPL(18), SPL(19), SPL(20), SPL(21), SPL(22), SPL(23),
+    SPL(24), SPL(25), SPL(26), SPL(27), SPL(28), SPL(29), SPL(30), SPL(31),
+    SPL(32), SPL(33), SPL(34), SPL(35), SPL(36), SPL(37), SPL(38), SPL(39),
+    SPL(40), SPL(41), SPL(42), SPL(43), SPL(44), SPL(45), SPL(46), SPL(47),
+    SPL(48), SPL(49), SPL(50), SPL(51), SPL(52), SPL(53), SPL(54), SPL(55),
+    SPL(56), SPL(57), SPL(58), SPL(59), SPL(60), SPL(61), SPL(62), SPL(63),
+    SPL(64), SPL(65), SPL(66), SPL(67), SPL(68), SPL(69), SPL(70), SPL(71),
+    SPL(72), SPL(73), SPL(74), SPL(75), SPL(76), SPL(77), SPL(78), SPL(79),
+    SPL(80), SPL(81), SPL(82), SPL(83), SPL(84), SPL(85), SPL(86), SPL(87),
+    SPL(88), SPL(89), SPL(90), SPL(91), SPL(92), SPL(93), SPL(94)
+  };
+
+static int verbose;
+static int nerrors;
+static int unwind_count;
+
+static int
+unwind_and_resume (long iteration, int (*next_func[])())
+{
+  unw_context_t uc;
+  unw_cursor_t c;
+  unw_word_t ip;
+  int i, ret;
+
+  if (verbose)
+    printf (" %s(iteration=%ld, next_func=%p)\n",
+	    __FUNCTION__, iteration, next_func);
+
+  unw_getcontext (&uc);
+  if ((ret = unw_init_local (&c, &uc)) < 0)
+    panic ("unw_init_local (ret=%d)", ret);
+
+  for (i = 0; i < unwind_count; ++i)
+    if ((ret = unw_step (&c)) < 0)
+      panic ("unw_step (ret=%d)", ret);
+
+  if (unw_get_reg (&c, UNW_REG_IP, &ip) < 0
+      || unw_set_reg (&c, UNW_REG_IP, (unw_word_t) &resumption_point_label) < 0
+      || unw_set_reg (&c, UNW_REG_EH + 0, 0)	/* ret val */
+      || unw_set_reg (&c, UNW_REG_EH + 1, ip))
+    panic ("failed to redirect to resumption_point\n");
+
+  if (verbose)
+    {
+      unw_word_t bsp;
+      if (unw_get_reg (&c, UNW_IA64_BSP, &bsp) < 0)
+	panic ("unw_get_reg() failed\n");
+      printf ("  bsp=%lx, old ip=%lx, new ip=%p\n", bsp,
+	      ip, &resumption_point_label);
+    }
+
+  ret = unw_resume (&c);
+  panic ("unw_resume() returned (ret=%d)!!\n", ret);
+  return 0;
+}
+
+static int
+run_check (int test)
+{
+  int nfuncs, nspills, n, ret, i, reg_values[88];
+  spill_func_t *func[NSTACKS + 1];
+
+  /* First, generate a set of 88 random values which loadup() will load
+     into loc2-loc89 (r37-r124).  */
+  for (i = 0; i < (int) ARRAY_SIZE (reg_values); ++i)
+    {
+      reg_values[i] = random ();
+      /* Generate NaTs with a reasonably probability (1/16th): */
+      if (reg_values[i] < 0x10000000)
+	reg_values[i] = 0;
+    }
+
+  nspills = 0;
+  nfuncs = 0;
+  do
+    {
+      n = random () % (int) ARRAY_SIZE (spill_funcs);
+      func[nfuncs++] = spill_funcs[n];
+      nspills += 2 + n;
+    }
+  while (nspills < 128);
+  func[nfuncs++] = unwind_and_resume;
+
+  unwind_count = 1 + (random () % (nfuncs + RECURSION_DEPTH - 1));
+
+  if (verbose)
+    printf ("test%d: nfuncs=%d, unwind_count=%d\n",
+	    test, nfuncs, unwind_count);
+
+  ret = loadup (RECURSION_DEPTH, reg_values, func);
+  if (ret < 0)
+    panic ("test%d: load() returned %d\n", test, ret);
+  else if (ret != RECURSION_DEPTH + nfuncs - unwind_count)
+    panic ("test%d: resumed wrong frame: expected %d, got %d\n",
+	   test, RECURSION_DEPTH + nfuncs - unwind_count, ret);
+  return 0;
+}
+
+int
+main (int argc, char **argv)
+{
+  int i;
+
+  if (argc > 1)
+    verbose = 1;
+
+  for (i = 0; i < 100000; ++i)
+    run_check (i + 1);
+
+  if (nerrors > 0)
+    {
+      fprintf (stderr, "FAILURE: detected %d errors\n", nerrors);
+      exit (-1);
+    }
+  if (verbose)
+    printf ("SUCCESS.\n");
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/tests/Gia64-test-readonly.c b/src/third_party/unwind/dist/tests/Gia64-test-readonly.c
new file mode 100644
index 00000000000..25f0506102d
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Gia64-test-readonly.c
@@ -0,0 +1,89 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* This file verifies that read-only registers cannot be written to.  */
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <libunwind.h>
+
+#define panic(args...)							  \
+	do { printf (args); ++nerrors; } while (0)
+
+static int verbose;
+static int nerrors;
+
+extern void test_func (void (*) (void));
+
+void
+checker (void)
+{
+  unw_fpreg_t fpval;
+  unw_context_t uc;
+  unw_cursor_t c;
+  int ret;
+
+  fpval.raw.bits[0] = 100;
+  fpval.raw.bits[1] = 101;
+
+  unw_getcontext (&uc);
+
+  if ((ret = unw_init_local (&c, &uc)) < 0)
+    panic ("%s: unw_init_local (ret=%d)\n", __FUNCTION__, ret);
+
+  if ((ret = unw_step (&c)) < 0)
+    panic ("%s: unw_step (ret=%d)\n", __FUNCTION__, ret);
+
+  if ((ret = unw_step (&c)) < 0)
+    panic ("%s: unw_step (ret=%d)\n", __FUNCTION__, ret);
+
+  if ((ret = unw_set_reg (&c, UNW_IA64_IP, 99)) != -UNW_EREADONLYREG)
+    panic ("%s: unw_set_reg (ip) returned %d instead of %d\n",
+	   __FUNCTION__, ret, -UNW_EREADONLYREG);
+  if ((ret = unw_set_reg (&c, UNW_IA64_AR_LC, 99)) != -UNW_EREADONLYREG)
+    panic ("%s: unw_set_reg (ar.lc) returned %d instead of %d\n",
+	   __FUNCTION__, ret, -UNW_EREADONLYREG);
+}
+
+int
+main (int argc, char **argv)
+{
+  if (argc > 1)
+    verbose = 1;
+
+  test_func (checker);
+
+  if (nerrors > 0)
+    {
+      fprintf (stderr, "FAILURE: detected %d errors\n", nerrors);
+      exit (-1);
+    }
+  if (verbose)
+    printf ("SUCCESS.\n");
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/tests/Gia64-test-stack.c b/src/third_party/unwind/dist/tests/Gia64-test-stack.c
new file mode 100644
index 00000000000..05874b291f3
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Gia64-test-stack.c
@@ -0,0 +1,176 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* This file tests corner-cases of unwinding across multiple stacks.
+   In particular, it verifies that the extreme case with a frame of 96
+   stacked registers that are all backed up by separate stacks works
+   as expected.  */
+
+#include <libunwind.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "ia64-test-stack.h"
+
+#define panic(args...)				\
+	{ printf (args); ++nerrors; }
+
+/* The loadrs field in ar.rsc is 14 bits wide, which limits all ia64
+   implementations to at most 2048 physical stacked registers
+   (actually, slightly less than that, because loadrs also counts RNaT
+   slots).  Since we can dirty 95 stacked registers per recursion, we
+   need to recurse RECURSION_DEPTH times to ensure all physical
+   stacked registers are in use. */
+#define MAX_PHYS_STACKED	2048
+#define RECURSION_DEPTH		((MAX_PHYS_STACKED + 94) / 95)
+
+extern void touch_all (unsigned long recursion_depth);
+extern void flushrs (void);
+
+int nerrors;
+int verbose;
+
+void
+do_unwind_tests (void)
+{
+  unw_word_t ip, sp, bsp, v0, v1, v2, v3, n0, n1, n2, n3, cfm, sof, sol, r32;
+  int ret, reg, i, l;
+  unw_context_t uc;
+  unw_cursor_t c;
+
+  if (verbose)
+    printf ("do_unwind_tests: here we go!\n");
+
+  /* do a full stack-dump: */
+  unw_getcontext (&uc);
+  unw_init_local (&c, &uc);
+  i = 0;
+  do
+    {
+      if (verbose)
+	{
+	  if ((ret = unw_get_reg (&c, UNW_IA64_IP, &ip)) < 0
+	      || (ret = unw_get_reg (&c, UNW_IA64_SP, &sp)) < 0
+	      || (ret = unw_get_reg (&c, UNW_IA64_BSP, &bsp)) < 0)
+	    break;
+	  printf ("ip=0x%16lx sp=0x%16lx bsp=0x%16lx\n", ip, sp, bsp);
+
+	  for (reg = 32; reg < 128; reg += 4)
+	    {
+	      v0 = v1 = v2 = v3 = 0;
+	      n0 = n1 = n2 = n3 = 0;
+	      (void)
+	         ((ret = unw_get_reg (&c, UNW_IA64_GR  + reg, &v0)) < 0
+	       || (ret = unw_get_reg (&c, UNW_IA64_NAT + reg, &n0)) < 0
+	       || (ret = unw_get_reg (&c, UNW_IA64_GR  + reg + 1, &v1)) < 0
+	       || (ret = unw_get_reg (&c, UNW_IA64_NAT + reg + 1, &n1)) < 0
+	       || (ret = unw_get_reg (&c, UNW_IA64_GR  + reg + 2, &v2)) < 0
+	       || (ret = unw_get_reg (&c, UNW_IA64_NAT + reg + 2, &n2)) < 0
+	       || (ret = unw_get_reg (&c, UNW_IA64_GR  + reg + 3, &v3)) < 0
+	       || (ret = unw_get_reg (&c, UNW_IA64_NAT + reg + 3, &n3)) < 0);
+	      if (reg < 100)
+		printf ("  r%d", reg);
+	      else
+		printf (" r%d", reg);
+	      printf (" %c%016lx %c%016lx %c%016lx %c%016lx\n",
+		      n0 ? '*' : ' ', v0, n1 ? '*' : ' ', v1,
+		      n2 ? '*' : ' ', v2, n3 ? '*' : ' ', v3);
+	      if (ret < 0)
+		break;
+	    }
+	}
+
+      if (i >= 1 && i <= NSTACKS)
+	{
+	  if ((ret = unw_get_reg (&c, UNW_IA64_CFM, &cfm)) < 0)
+	    break;
+	  sof = cfm & 0x7f;
+	  if (sof != (unw_word_t) (i & 1))
+	      panic ("\texpected sof=%d, found sof=%lu\n", i - 1, sof);
+	  if (sof == 1)
+	    {
+	      if ((ret = unw_get_reg (&c, UNW_IA64_GR + 32, &r32)) < 0)
+		break;
+	      if (r32 != (unw_word_t) (i - 1))
+		panic ("\texpected r32=%d, found r32=%lu\n", i - 1, r32);
+	    }
+	}
+      else if (i > NSTACKS && i <= NSTACKS + RECURSION_DEPTH)
+	{
+	  if ((ret = unw_get_reg (&c, UNW_IA64_CFM, &cfm)) < 0)
+	    break;
+	  sof = cfm & 0x7f;
+	  sol = (cfm >> 7) & 0x7f;
+	  if (sof != 96)
+	      panic ("\texpected sof=96, found sof=%lu\n", sof);
+	  if (sol != 95)
+	      panic ("\texpected sol=95, found sol=%lu\n", sol);
+
+	  for (l = 2; l <= 93; ++l)
+	    {
+	      if ((ret = unw_get_reg (&c, UNW_IA64_GR + 33 + l, &v0)) < 0
+		  || (ret = unw_get_reg (&c, UNW_IA64_NAT + 33 + l, &n0)) < 0)
+		break;
+	      switch (l)
+		{
+		case 2: case 31: case 73: case 93:
+		  if (!n0)
+		    panic ("\texpected loc%d to be a NaT!\n", l);
+		  break;
+
+		default:
+		  if (n0)
+		    panic ("\tloc%d is unexpectedly a NaT!\n", l);
+		  v1 = ((unw_word_t) (i - NSTACKS) << 32) + l;
+		  if (v0 != v1)
+		    panic ("\tloc%d expected to be %lx, found to be %lx\n",
+			   l, v1, v0);
+		}
+	    }
+	}
+      ++i;
+    }
+  while ((ret = unw_step (&c)) > 0);
+
+  if (ret < 0)
+    panic ("libunwind returned %d\n", ret);
+}
+
+int
+main (int argc, char **argv)
+{
+  if (argc > 1)
+    ++verbose;
+
+  touch_all (RECURSION_DEPTH);
+  if (nerrors)
+    {
+      printf ("FAILURE: detected %d errors\n", nerrors);
+      exit (-1);
+    }
+  if (verbose)
+    printf ("SUCCESS\n");
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/tests/Gperf-simple.c b/src/third_party/unwind/dist/tests/Gperf-simple.c
new file mode 100644
index 00000000000..e1819182140
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Gperf-simple.c
@@ -0,0 +1,264 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <libunwind.h>
+#include "compiler.h"
+
+#include <sys/resource.h>
+#include <sys/time.h>
+
+#define panic(args...)							  \
+	do { fprintf (stderr, args); exit (-1); } while (0)
+
+long dummy;
+
+static long iterations = 10000;
+static int maxlevel = 100;
+
+#define KB	1024
+#define MB	(1024*1024)
+
+static char big[64*MB];	/* should be >> max. cache size */
+
+static inline double
+gettime (void)
+{
+  struct timeval tv;
+
+  gettimeofday (&tv, NULL);
+  return tv.tv_sec + 1e-6*tv.tv_usec;
+}
+
+static int NOINLINE
+measure_unwind (int maxlevel, double *step)
+{
+  double stop, start;
+  unw_cursor_t cursor;
+  unw_context_t uc;
+  int ret, level = 0;
+
+  unw_getcontext (&uc);
+  if (unw_init_local (&cursor, &uc) < 0)
+    panic ("unw_init_local() failed\n");
+
+  start = gettime ();
+
+  do
+    {
+      ret = unw_step (&cursor);
+      if (ret < 0)
+	panic ("unw_step() failed\n");
+      ++level;
+    }
+  while (ret > 0);
+
+  stop = gettime ();
+
+  if (level <= maxlevel)
+    panic ("Unwound only %d levels, expected at least %d levels\n",
+	   level, maxlevel);
+
+  *step = (stop - start) / (double) level;
+  return 0;
+}
+
+static int f1 (int, int, double *);
+
+static int NOINLINE
+g1 (int level, int maxlevel, double *step)
+{
+  if (level == maxlevel)
+    return measure_unwind (maxlevel, step);
+  else
+    /* defeat last-call/sibcall optimization */
+    return f1 (level + 1, maxlevel, step) + level;
+}
+
+static int NOINLINE
+f1 (int level, int maxlevel, double *step)
+{
+  if (level == maxlevel)
+    return measure_unwind (maxlevel, step);
+  else
+    /* defeat last-call/sibcall optimization */
+    return g1 (level + 1, maxlevel, step) + level;
+}
+
+static void
+doit (const char *label)
+{
+  double step, min_step, first_step, sum_step;
+  int i;
+
+  sum_step = first_step = 0.0;
+  min_step = 1e99;
+  for (i = 0; i < iterations; ++i)
+    {
+      f1 (0, maxlevel, &step);
+
+      sum_step += step;
+
+      if (step < min_step)
+	min_step = step;
+
+      if (i == 0)
+	first_step = step;
+    }
+  printf ("%s: unw_step : 1st=%9.3f min=%9.3f avg=%9.3f nsec\n", label,
+	  1e9*first_step, 1e9*min_step, 1e9*sum_step/iterations);
+}
+
+static long
+sum (void *buf, size_t size)
+{
+  long s = 0;
+  char *cp = buf;
+  size_t i;
+
+  for (i = 0; i < size; i += 8)
+    s += cp[i];
+  return s;
+}
+
+static void
+measure_init (void)
+{
+# define N	100
+# define M	10	/* must be at least 2 to get steady-state */
+  double stop, start, get_cold, get_warm, init_cold, init_warm, delta;
+  struct
+    {
+      unw_cursor_t c;
+      char padding[1024];	/* should be > 2 * max. cacheline size */
+    }
+  cursor[N];
+  struct
+    {
+      unw_context_t uc;
+      char padding[1024];	/* should be > 2 * max. cacheline size */
+    }
+  uc[N];
+  int i, j;
+
+  /* Run each test M times and take the minimum to filter out noise
+     such dynamic linker resolving overhead, context-switches,
+     page-in, cache, and TLB effects.  */
+
+  get_cold = 1e99;
+  for (j = 0; j < M; ++j)
+    {
+      dummy += sum (big, sizeof (big));			/* flush the cache */
+      for (i = 0; i < N; ++i)
+	uc[i].padding[511] = i;		/* warm up the TLB */
+      start = gettime ();
+      for (i = 0; i < N; ++i)
+	unw_getcontext (&uc[i].uc);
+      stop = gettime ();
+      delta = (stop - start) / N;
+      if (delta < get_cold)
+	get_cold = delta;
+    }
+
+  init_cold = 1e99;
+  for (j = 0; j < M; ++j)
+    {
+      dummy += sum (big, sizeof (big));	/* flush cache */
+      for (i = 0; i < N; ++i)
+	uc[i].padding[511] = i;		/* warm up the TLB */
+      start = gettime ();
+      for (i = 0; i < N; ++i)
+	unw_init_local (&cursor[i].c, &uc[i].uc);
+      stop = gettime ();
+      delta = (stop - start) / N;
+      if (delta < init_cold)
+	init_cold = delta;
+    }
+
+  get_warm = 1e99;
+  for (j = 0; j < M; ++j)
+    {
+      start = gettime ();
+      for (i = 0; i < N; ++i)
+	unw_getcontext (&uc[0].uc);
+      stop = gettime ();
+      delta = (stop - start) / N;
+      if (delta < get_warm)
+	get_warm = delta;
+    }
+
+  init_warm = 1e99;
+  for (j = 0; j < M; ++j)
+    {
+      start = gettime ();
+      for (i = 0; i < N; ++i)
+	unw_init_local (&cursor[0].c, &uc[0].uc);
+      stop = gettime ();
+      delta = (stop - start) / N;
+      if (delta < init_warm)
+	init_warm = delta;
+    }
+
+  printf ("unw_getcontext : cold avg=%9.3f nsec, warm avg=%9.3f nsec\n",
+	  1e9 * get_cold, 1e9 * get_warm);
+  printf ("unw_init_local : cold avg=%9.3f nsec, warm avg=%9.3f nsec\n",
+	  1e9 * init_cold, 1e9 * init_warm);
+}
+
+int
+main (int argc, char **argv)
+{
+  struct rlimit rlim;
+
+  rlim.rlim_cur = RLIM_INFINITY;
+  rlim.rlim_max = RLIM_INFINITY;
+  setrlimit (RLIMIT_STACK, &rlim);
+
+  memset (big, 0xaa, sizeof (big));
+
+  if (argc > 1)
+    {
+      maxlevel = atol (argv[1]);
+      if (argc > 2)
+	iterations = atol (argv[2]);
+    }
+
+  measure_init ();
+
+  doit ("default         ");
+
+  unw_set_caching_policy (unw_local_addr_space, UNW_CACHE_NONE);
+  doit ("no cache        ");
+
+  unw_set_caching_policy (unw_local_addr_space, UNW_CACHE_GLOBAL);
+  doit ("global cache    ");
+
+  unw_set_caching_policy (unw_local_addr_space, UNW_CACHE_PER_THREAD);
+  doit ("per-thread cache");
+
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/tests/Gperf-trace.c b/src/third_party/unwind/dist/tests/Gperf-trace.c
new file mode 100644
index 00000000000..4d24fa5ca86
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Gperf-trace.c
@@ -0,0 +1,250 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <libunwind.h>
+#include "compiler.h"
+
+#include <sys/resource.h>
+#include <sys/time.h>
+
+#define panic(args...)							  \
+	do { fprintf (stderr, args); exit (-1); } while (0)
+
+long dummy;
+
+static long iterations = 10000;
+static int maxlevel = 100;
+
+#define KB	1024
+#define MB	(1024*1024)
+
+static char big[64*MB];	/* should be >> max. cache size */
+
+static inline double
+gettime (void)
+{
+  struct timeval tv;
+
+  gettimeofday (&tv, NULL);
+  return tv.tv_sec + 1e-6*tv.tv_usec;
+}
+
+static int NOINLINE
+measure_unwind (int maxlevel, double *step)
+{
+  double stop, start;
+  int level = 0;
+  void *buffer[128];
+
+  start = gettime ();
+  level = unw_backtrace(buffer, 128);
+  stop = gettime ();
+
+  if (level <= maxlevel)
+    panic ("Unwound only %d levels, expected at least %d levels\n",
+	   level, maxlevel);
+
+  *step = (stop - start) / (double) level;
+  return 0;
+}
+
+static int f1 (int, int, double *);
+
+static int NOINLINE
+g1 (int level, int maxlevel, double *step)
+{
+  if (level == maxlevel)
+    return measure_unwind (maxlevel, step);
+  else
+    /* defeat last-call/sibcall optimization */
+    return f1 (level + 1, maxlevel, step) + level;
+}
+
+static int NOINLINE
+f1 (int level, int maxlevel, double *step)
+{
+  if (level == maxlevel)
+    return measure_unwind (maxlevel, step);
+  else
+    /* defeat last-call/sibcall optimization */
+    return g1 (level + 1, maxlevel, step) + level;
+}
+
+static void
+doit (const char *label)
+{
+  double step, min_step, first_step, sum_step;
+  int i;
+
+  sum_step = first_step = 0.0;
+  min_step = 1e99;
+  for (i = 0; i < iterations; ++i)
+    {
+      f1 (0, maxlevel, &step);
+
+      sum_step += step;
+
+      if (step < min_step)
+	min_step = step;
+
+      if (i == 0)
+	first_step = step;
+    }
+  printf ("%s: unw_step : 1st=%9.3f min=%9.3f avg=%9.3f nsec\n", label,
+	  1e9*first_step, 1e9*min_step, 1e9*sum_step/iterations);
+}
+
+static long
+sum (void *buf, size_t size)
+{
+  long s = 0;
+  char *cp = buf;
+  size_t i;
+
+  for (i = 0; i < size; i += 8)
+    s += cp[i];
+  return s;
+}
+
+static void
+measure_init (void)
+{
+# define N	100
+# define M	10	/* must be at least 2 to get steady-state */
+  double stop, start, get_cold, get_warm, init_cold, init_warm, delta;
+  struct
+    {
+      unw_cursor_t c;
+      char padding[1024];	/* should be > 2 * max. cacheline size */
+    }
+  cursor[N];
+  struct
+    {
+      unw_context_t uc;
+      char padding[1024];	/* should be > 2 * max. cacheline size */
+    }
+  uc[N];
+  int i, j;
+
+  /* Run each test M times and take the minimum to filter out noise
+     such dynamic linker resolving overhead, context-switches,
+     page-in, cache, and TLB effects.  */
+
+  get_cold = 1e99;
+  for (j = 0; j < M; ++j)
+    {
+      dummy += sum (big, sizeof (big));			/* flush the cache */
+      for (i = 0; i < N; ++i)
+	uc[i].padding[511] = i;		/* warm up the TLB */
+      start = gettime ();
+      for (i = 0; i < N; ++i)
+	unw_getcontext (&uc[i].uc);
+      stop = gettime ();
+      delta = (stop - start) / N;
+      if (delta < get_cold)
+	get_cold = delta;
+    }
+
+  init_cold = 1e99;
+  for (j = 0; j < M; ++j)
+    {
+      dummy += sum (big, sizeof (big));	/* flush cache */
+      for (i = 0; i < N; ++i)
+	uc[i].padding[511] = i;		/* warm up the TLB */
+      start = gettime ();
+      for (i = 0; i < N; ++i)
+	unw_init_local (&cursor[i].c, &uc[i].uc);
+      stop = gettime ();
+      delta = (stop - start) / N;
+      if (delta < init_cold)
+	init_cold = delta;
+    }
+
+  get_warm = 1e99;
+  for (j = 0; j < M; ++j)
+    {
+      start = gettime ();
+      for (i = 0; i < N; ++i)
+	unw_getcontext (&uc[0].uc);
+      stop = gettime ();
+      delta = (stop - start) / N;
+      if (delta < get_warm)
+	get_warm = delta;
+    }
+
+  init_warm = 1e99;
+  for (j = 0; j < M; ++j)
+    {
+      start = gettime ();
+      for (i = 0; i < N; ++i)
+	unw_init_local (&cursor[0].c, &uc[0].uc);
+      stop = gettime ();
+      delta = (stop - start) / N;
+      if (delta < init_warm)
+	init_warm = delta;
+    }
+
+  printf ("unw_getcontext : cold avg=%9.3f nsec, warm avg=%9.3f nsec\n",
+	  1e9 * get_cold, 1e9 * get_warm);
+  printf ("unw_init_local : cold avg=%9.3f nsec, warm avg=%9.3f nsec\n",
+	  1e9 * init_cold, 1e9 * init_warm);
+}
+
+int
+main (int argc, char **argv)
+{
+  struct rlimit rlim;
+
+  rlim.rlim_cur = RLIM_INFINITY;
+  rlim.rlim_max = RLIM_INFINITY;
+  setrlimit (RLIMIT_STACK, &rlim);
+
+  memset (big, 0xaa, sizeof (big));
+
+  if (argc > 1)
+    {
+      maxlevel = atol (argv[1]);
+      if (argc > 2)
+	iterations = atol (argv[2]);
+    }
+
+  measure_init ();
+
+  doit ("default         ");
+
+  unw_set_caching_policy (unw_local_addr_space, UNW_CACHE_NONE);
+  doit ("no cache        ");
+
+  unw_set_caching_policy (unw_local_addr_space, UNW_CACHE_GLOBAL);
+  doit ("global cache    ");
+
+  unw_set_caching_policy (unw_local_addr_space, UNW_CACHE_PER_THREAD);
+  doit ("per-thread cache");
+
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/tests/Gtest-bt.c b/src/third_party/unwind/dist/tests/Gtest-bt.c
new file mode 100644
index 00000000000..beae2a3ccd9
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Gtest-bt.c
@@ -0,0 +1,263 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include "compiler.h"
+
+#include <errno.h>
+#if HAVE_EXECINFO_H
+# include <execinfo.h>
+#else
+  extern int backtrace (void **, int);
+#endif
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ucontext.h>
+#include <unistd.h>
+#include <libunwind.h>
+
+#define panic(args...)				\
+	{ fprintf (stderr, args); exit (-1); }
+
+#define SIG_STACK_SIZE 0x100000
+
+int verbose;
+int num_errors;
+
+/* These variables are global because they
+ * cause the signal stack to overflow */
+char buf[512], name[256];
+unw_cursor_t cursor;
+unw_context_t uc;
+
+static void
+do_backtrace (void)
+{
+  unw_word_t ip, sp, off;
+  unw_proc_info_t pi;
+  int ret;
+
+  if (verbose)
+    printf ("\texplicit backtrace:\n");
+
+  unw_getcontext (&uc);
+  if (unw_init_local (&cursor, &uc) < 0)
+    panic ("unw_init_local failed!\n");
+
+  do
+    {
+      unw_get_reg (&cursor, UNW_REG_IP, &ip);
+      unw_get_reg (&cursor, UNW_REG_SP, &sp);
+      buf[0] = '\0';
+      if (unw_get_proc_name (&cursor, name, sizeof (name), &off) == 0)
+	{
+	  if (off)
+	    snprintf (buf, sizeof (buf), "<%s+0x%lx>", name, (long) off);
+	  else
+	    snprintf (buf, sizeof (buf), "<%s>", name);
+	}
+      if (verbose)
+	{
+	  printf ("%016lx %-32s (sp=%016lx)\n", (long) ip, buf, (long) sp);
+
+	  if (unw_get_proc_info (&cursor, &pi) == 0)
+	    {
+	      printf ("\tproc=0x%lx-0x%lx\n\thandler=0x%lx lsda=0x%lx gp=0x%lx",
+		  (long) pi.start_ip, (long) pi.end_ip,
+		  (long) pi.handler, (long) pi.lsda, (long) pi.gp);
+	    }
+
+#if UNW_TARGET_IA64
+	  {
+	    unw_word_t bsp;
+
+	    unw_get_reg (&cursor, UNW_IA64_BSP, &bsp);
+	    printf (" bsp=%lx", bsp);
+	  }
+#endif
+	  printf ("\n");
+	}
+
+      ret = unw_step (&cursor);
+      if (ret < 0)
+	{
+	  unw_get_reg (&cursor, UNW_REG_IP, &ip);
+	  printf ("FAILURE: unw_step() returned %d for ip=%lx\n",
+		  ret, (long) ip);
+	  ++num_errors;
+	}
+    }
+  while (ret > 0);
+
+  {
+    void *buffer[20];
+    int i, n;
+
+    if (verbose)
+      printf ("\n\tvia backtrace():\n");
+    n = backtrace (buffer, 20);
+    if (verbose)
+      for (i = 0; i < n; ++i)
+	printf ("[%d] ip=%p\n", i, buffer[i]);
+  }
+}
+
+void
+foo (long val UNUSED)
+{
+  do_backtrace ();
+}
+
+void
+bar (long v)
+{
+  extern long f (long);
+  int arr[v];
+
+  /* This is a vain attempt to use up lots of registers to force
+     the frame-chain info to be saved on the memory stack on ia64.
+     It happens to work with gcc v3.3.4 and gcc v3.4.1 but perhaps
+     not with any other compiler.  */
+  foo (f (arr[0]) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + f (v))
+       ))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))
+       )))))))))))))))))))))))))))))))))))))))))))))))))))))));
+}
+
+void
+sighandler (int signal, void *siginfo UNUSED, void *context)
+{
+  ucontext_t *uc UNUSED;
+  int sp;
+
+  uc = context;
+
+  if (verbose)
+    {
+      printf ("sighandler: got signal %d, sp=%p", signal, &sp);
+#if UNW_TARGET_IA64
+# if defined(__linux__)
+      printf (" @ %lx", uc->uc_mcontext.sc_ip);
+# else
+      {
+	uint16_t reason;
+	uint64_t ip;
+
+	__uc_get_reason (uc, &reason);
+	__uc_get_ip (uc, &ip);
+	printf (" @ %lx (reason=%d)", ip, reason);
+      }
+# endif
+#elif UNW_TARGET_X86
+#if defined __linux__
+      printf (" @ %lx", (unsigned long) uc->uc_mcontext.gregs[REG_EIP]);
+#elif defined __FreeBSD__
+      printf (" @ %lx", (unsigned long) uc->uc_mcontext.mc_eip);
+#endif
+#elif UNW_TARGET_X86_64
+#if defined __linux__
+      printf (" @ %lx", (unsigned long) uc->uc_mcontext.gregs[REG_RIP]);
+#elif defined __FreeBSD__
+      printf (" @ %lx", (unsigned long) uc->uc_mcontext.mc_rip);
+#endif
+#endif
+      printf ("\n");
+    }
+  do_backtrace();
+}
+
+int
+main (int argc, char **argv UNUSED)
+{
+  struct sigaction act;
+  stack_t stk;
+
+  verbose = (argc > 1);
+
+  if (verbose)
+    printf ("Normal backtrace:\n");
+
+  bar (1);
+
+  memset (&act, 0, sizeof (act));
+  act.sa_handler = (void (*)(int)) sighandler;
+  act.sa_flags = SA_SIGINFO;
+  if (sigaction (SIGTERM, &act, NULL) < 0)
+    panic ("sigaction: %s\n", strerror (errno));
+
+  if (verbose)
+    printf ("\nBacktrace across signal handler:\n");
+  kill (getpid (), SIGTERM);
+
+  if (verbose)
+    printf ("\nBacktrace across signal handler on alternate stack:\n");
+  stk.ss_sp = malloc (SIG_STACK_SIZE);
+  if (!stk.ss_sp)
+    panic ("failed to allocate %u bytes\n", SIG_STACK_SIZE);
+  stk.ss_size = SIG_STACK_SIZE;
+  stk.ss_flags = 0;
+  if (sigaltstack (&stk, NULL) < 0)
+    panic ("sigaltstack: %s\n", strerror (errno));
+
+  memset (&act, 0, sizeof (act));
+  act.sa_handler = (void (*)(int)) sighandler;
+  act.sa_flags = SA_ONSTACK | SA_SIGINFO;
+  if (sigaction (SIGTERM, &act, NULL) < 0)
+    panic ("sigaction: %s\n", strerror (errno));
+  kill (getpid (), SIGTERM);
+
+  if (num_errors > 0)
+    {
+      fprintf (stderr, "FAILURE: detected %d errors\n", num_errors);
+      exit (-1);
+    }
+  if (verbose)
+    printf ("SUCCESS.\n");
+
+  signal (SIGTERM, SIG_DFL);
+  stk.ss_flags = SS_DISABLE;
+  sigaltstack (&stk, NULL);
+  free (stk.ss_sp);
+
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/tests/Gtest-concurrent.c b/src/third_party/unwind/dist/tests/Gtest-concurrent.c
new file mode 100644
index 00000000000..6f3447fd844
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Gtest-concurrent.c
@@ -0,0 +1,136 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2005 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/*  Verify that multi-threaded concurrent unwinding works as expected.  */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include "compiler.h"
+
+#include <libunwind.h>
+#include <limits.h>
+#include <pthread.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#define NTHREADS	128
+
+#define panic(args...)						\
+	do { fprintf (stderr, args); ++nerrors; } while (0)
+
+int verbose;
+int nerrors;
+int got_usr1, got_usr2;
+char *sigusr1_sp;
+
+void
+handler (int sig UNUSED)
+{
+  unw_word_t ip;
+  unw_context_t uc;
+  unw_cursor_t c;
+  int ret;
+
+  unw_getcontext (&uc);
+  unw_init_local (&c, &uc);
+  do
+    {
+      unw_get_reg (&c, UNW_REG_IP, &ip);
+      if (verbose)
+	printf ("%lx: IP=%lx\n", (long) pthread_self (), (unsigned long) ip);
+    }
+  while ((ret = unw_step (&c)) > 0);
+
+  if (ret < 0)
+    panic ("unw_step() returned %d\n", ret);
+}
+
+void *
+worker (void *arg UNUSED)
+{
+  signal (SIGUSR1, handler);
+
+  if (verbose)
+    printf ("sending SIGUSR1\n");
+  pthread_kill (pthread_self (), SIGUSR1);
+  return NULL;
+}
+
+static void
+doit (void)
+{
+  pthread_t th[NTHREADS];
+  pthread_attr_t attr;
+  int i;
+
+  pthread_attr_init (&attr);
+  pthread_attr_setstacksize (&attr, PTHREAD_STACK_MIN + 64*1024);
+
+  for (i = 0; i < NTHREADS; ++i)
+    if (pthread_create (th + i, &attr, worker, NULL))
+      {
+	fprintf (stderr, "FAILURE: Failed to create %u threads "
+		 "(after %u threads)\n",
+		 NTHREADS, i);
+	exit (-1);
+      }
+
+  for (i = 0; i < NTHREADS; ++i)
+    pthread_join (th[i], NULL);
+}
+
+int
+main (int argc, char **argv UNUSED)
+{
+  if (argc > 1)
+    verbose = 1;
+
+  if (verbose)
+    printf ("Caching: none\n");
+  unw_set_caching_policy (unw_local_addr_space, UNW_CACHE_NONE);
+  doit ();
+
+  if (verbose)
+    printf ("Caching: global\n");
+  unw_set_caching_policy (unw_local_addr_space, UNW_CACHE_GLOBAL);
+  doit ();
+
+  if (verbose)
+    printf ("Caching: per-thread\n");
+  unw_set_caching_policy (unw_local_addr_space, UNW_CACHE_PER_THREAD);
+  doit ();
+
+  if (nerrors)
+    {
+      fprintf (stderr, "FAILURE: detected %d errors\n", nerrors);
+      exit (-1);
+    }
+
+  if (verbose)
+    printf ("SUCCESS\n");
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/tests/Gtest-dyn1.c b/src/third_party/unwind/dist/tests/Gtest-dyn1.c
new file mode 100644
index 00000000000..bc7dc9cf7fe
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Gtest-dyn1.c
@@ -0,0 +1,223 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002-2003 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* This file tests dynamic code-generation via function-cloning.  */
+
+#include "flush-cache.h"
+
+#include "compiler.h"
+
+#include <libunwind.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <signal.h>
+#include <sys/mman.h>
+
+#if UNW_TARGET_ARM
+#define MAX_FUNC_SIZE   96 	/* FIXME: arch/compiler dependent */
+#else
+#define MAX_FUNC_SIZE	2048	/* max. size of cloned function */
+#endif
+
+#define panic(args...)				\
+	{ fprintf (stderr, args); exit (-1); }
+
+typedef void (*template_t) (int, void (*)(),
+			    int (*)(const char *, ...), const char *,
+			    const char **);
+
+int verbose;
+
+static const char *strarr[] =
+  {
+    "i", "ii", "iii", "iv", "v", "vi", "vii", "viii", "ix", "x", NULL
+  };
+
+#ifdef __ia64__
+struct fdesc
+  {
+    long code;
+    long gp;
+  };
+# define get_fdesc(fdesc,func)	(fdesc = *(struct fdesc *) &(func))
+# define get_funcp(fdesc)	((template_t) &(fdesc))
+# define get_gp(fdesc)		((fdesc).gp)
+#elif __arm__
+struct fdesc
+  {
+    long code;
+    long is_thumb;
+  };
+/* Workaround GCC bug: https://bugs.launchpad.net/gcc-linaro/+bug/721531 */
+# define get_fdesc(fdesc,func)  ({long tmp = (long) &(func); \
+                                  (fdesc).code = (long) &(func) & ~0x1; \
+                                  (fdesc).is_thumb = tmp & 0x1;})
+/*# define get_fdesc(fdesc,func)  ({(fdesc).code = (long) &(func) & ~0x1; \
+                                  (fdesc).is_thumb = (long) &(func) & 0x1;})*/
+# define get_funcp(fdesc)       ((template_t) ((fdesc).code | (fdesc).is_thumb))
+# define get_gp(fdesc)          (0)
+#else
+struct fdesc
+  {
+    long code;
+  };
+# define get_fdesc(fdesc,func)	(fdesc.code = (long) &(func))
+# define get_funcp(fdesc)	((template_t) (fdesc).code)
+# define get_gp(fdesc)		(0)
+#endif
+
+void
+template (int i, template_t self,
+	  int (*printer)(const char *, ...), const char *fmt, const char **arr)
+{
+  (*printer) (fmt, arr[11 - i][0], arr[11 - i] + 1);
+  if (i > 0)
+    (*self) (i - 1, self, printer, fmt, arr);
+}
+
+static void
+sighandler (int signal)
+{
+  unw_cursor_t cursor;
+  char name[128], off[32];
+  unw_word_t ip, offset;
+  unw_context_t uc;
+  int count;
+
+  if (verbose)
+    printf ("caught signal %d\n", signal);
+
+  unw_getcontext (&uc);
+  unw_init_local (&cursor, &uc);
+
+  count = 0;
+  while (!unw_is_signal_frame (&cursor))
+    {
+      if (unw_step (&cursor) < 0)
+	panic ("failed to find signal frame!\n");
+
+      if (count++ > 20)
+	{
+	  panic ("Too many steps to the signal frame (%d)\n", count);
+	  break;
+	}
+    }
+  unw_step (&cursor);
+
+  count = 0;
+  do
+    {
+      unw_get_reg (&cursor, UNW_REG_IP, &ip);
+      name[0] = '\0';
+      off[0] = '\0';
+      if (unw_get_proc_name (&cursor, name, sizeof (name), &offset) == 0
+	  && offset > 0)
+	snprintf (off, sizeof (off), "+0x%lx", (long) offset);
+      if (verbose)
+	printf ("ip = %lx <%s%s>\n", (long) ip, name, off);
+      ++count;
+
+      if (count > 20)
+	{
+	  panic ("Too many steps (%d)\n", count);
+	  break;
+	}
+
+    }
+  while (unw_step (&cursor) > 0);
+
+  if (count != 13)
+    panic ("FAILURE: expected 13, not %d frames below signal frame\n", count);
+
+  if (verbose)
+    printf ("SUCCESS\n");
+  exit (0);
+}
+
+int
+dev_null (const char *format UNUSED, ...)
+{
+  return 0;
+}
+
+int
+main (int argc, char *argv[] UNUSED)
+{
+  unw_dyn_region_info_t *region;
+  unw_dyn_info_t di;
+  struct fdesc fdesc;
+  template_t funcp;
+  void *mem;
+
+  if (argc > 1)
+    ++verbose;
+
+  mem = malloc (getpagesize ());
+
+  get_fdesc (fdesc, template);
+
+  if (verbose)
+    printf ("old code @ %p, new code @ %p\n", (void *) fdesc.code, mem);
+
+  memcpy (mem, (void *) fdesc.code, MAX_FUNC_SIZE);
+  mprotect ((void *) ((long) mem & ~(getpagesize () - 1)),
+	    2*getpagesize(), PROT_READ | PROT_WRITE | PROT_EXEC);
+
+  flush_cache (mem, MAX_FUNC_SIZE);
+
+  signal (SIGSEGV, sighandler);
+
+  /* register the new function: */
+  region = alloca (_U_dyn_region_info_size (2));
+  region->next = NULL;
+  region->insn_count = 3 * (MAX_FUNC_SIZE / 16);
+  region->op_count = 2;
+  _U_dyn_op_alias (&region->op[0], 0, -1, fdesc.code);
+  _U_dyn_op_stop (&region->op[1]);
+
+  memset (&di, 0, sizeof (di));
+  di.start_ip = (long) mem;
+  di.end_ip = (long) mem + 16*region->insn_count/3;
+  di.gp = get_gp (fdesc);
+  di.format = UNW_INFO_FORMAT_DYNAMIC;
+  di.u.pi.name_ptr = (unw_word_t) "copy_of_template";
+  di.u.pi.regions = region;
+
+  _U_dyn_register (&di);
+
+  /* call new function: */
+  fdesc.code = (long) mem;
+  funcp = get_funcp (fdesc);
+
+  if (verbose)
+    (*funcp) (10, funcp, printf, "iteration %c%s\n", strarr);
+  else
+    (*funcp) (10, funcp, dev_null, "iteration %c%s\n", strarr);
+
+  _U_dyn_cancel (&di);
+  return -1;
+}
diff --git a/src/third_party/unwind/dist/tests/Gtest-exc.c b/src/third_party/unwind/dist/tests/Gtest-exc.c
new file mode 100644
index 00000000000..1170bdd03fd
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Gtest-exc.c
@@ -0,0 +1,162 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* This illustrates the basics of using the unwind interface for
+   exception handling.  */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <libunwind.h>
+
+#ifdef HAVE_IA64INTRIN_H
+# include <ia64intrin.h>
+#endif
+
+#define panic(args...)				\
+	{ ++nerrors; fprintf (stderr, args); }
+
+int nerrors = 0;
+int verbose = 0;
+int depth = 13;
+volatile int got_here = 0;
+
+extern void b (int);
+
+void
+raise_exception (void)
+{
+  unw_cursor_t cursor;
+  unw_context_t uc;
+  int i;
+
+  unw_getcontext (&uc);
+  if (unw_init_local (&cursor, &uc) < 0)
+    {
+      panic ("unw_init_local() failed!\n");
+      return;
+    }
+
+  /* unwind to top-most frame a(), skipping over b() and raise_exception(): */
+  for (i = 0; i < depth + 2; ++i)
+    if (unw_step (&cursor) < 0)
+      {
+	panic ("unw_step() failed!\n");
+	return;
+      }
+  unw_resume (&cursor);	/* transfer control to exception handler */
+}
+
+uintptr_t
+get_bsp (void)
+{
+#if UNW_TARGET_IA64
+# ifdef __INTEL_COMPILER
+  return __getReg (_IA64_REG_AR_BSP);
+# else
+  return (uintptr_t) __builtin_ia64_bsp ();
+# endif
+#else
+  return 0;
+#endif
+}
+
+int
+a (int n)
+{
+  long stack;
+  int result = 99;
+
+  if (verbose)
+    printf ("a(n=%d): sp=%p bsp=0x%lx\n",
+	    n, &stack, (unsigned long) get_bsp ());
+
+  if (n > 0)
+    a (n - 1);
+  else
+    b (16);
+
+  if (verbose)
+    {
+      printf ("exception handler: here we go (sp=%p, bsp=0x%lx)...\n",
+	      &stack, (unsigned long) get_bsp ());
+      /* This call works around a bug in gcc (up-to pre3.4) which
+	 causes invalid assembly code to be generated when
+	 __builtin_ia64_bsp() gets predicated.  */
+      getpid ();
+    }
+  if (n == depth)
+    {
+      result = 0;
+      got_here = 1;
+    }
+  return result;
+}
+
+void
+b (int n)
+{
+  if ((n & 1) == 0)
+    {
+      if (verbose)
+	printf ("b(n=%d) calling raise_exception()\n", n);
+      raise_exception ();
+    }
+  panic ("FAILURE: b() returned from raise_exception()!!\n");
+}
+
+int
+main (int argc, char **argv)
+{
+  int result;
+
+  if (argc > 1)
+    {
+      ++verbose;
+      depth = atol (argv[1]);
+      if (depth < 1)
+	{
+	  fprintf (stderr, "Usage: %s depth\n"
+		   "  depth must be >= 1\n", argv[0]);
+	  exit (-1);
+	}
+    }
+
+  result = a (depth);
+  if (result != 0 || !got_here || nerrors > 0)
+    {
+      fprintf (stderr,
+	       "FAILURE: test failed: result=%d got_here=%d nerrors=%d\n",
+	       result, got_here, nerrors);
+      exit (-1);
+    }
+
+  if (verbose)
+    printf ("SUCCESS!\n");
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/tests/Gtest-init.cxx b/src/third_party/unwind/dist/tests/Gtest-init.cxx
new file mode 100644
index 00000000000..afded019273
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Gtest-init.cxx
@@ -0,0 +1,107 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002-2003 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* This file tests unwinding from a constructor from within an
+   atexit() handler.  */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <libunwind.h>
+#include "compiler.h"
+
+int verbose, errors;
+
+#define panic(args...)					\
+	{ ++errors; fprintf (stderr, args); return; }
+
+class Test_Class {
+  public:
+  Test_Class (void);
+};
+
+static Test_Class t;
+
+static void
+do_backtrace (void)
+{
+  char name[128], off[32];
+  unw_word_t ip, offset;
+  unw_cursor_t cursor;
+  unw_context_t uc;
+  int ret, count = 0;
+
+  unw_getcontext (&uc);
+  unw_init_local (&cursor, &uc);
+
+  do
+    {
+      unw_get_reg (&cursor, UNW_REG_IP, &ip);
+      name[0] = '\0';
+      off[0] = '\0';
+      if (unw_get_proc_name (&cursor, name, sizeof (name), &offset) == 0
+	  && offset > 0)
+	snprintf (off, sizeof (off), "+0x%lx", (long) offset);
+      if (verbose)
+	printf ("  [%lx] <%s%s>\n", (long) ip, name, off);
+      if (++count > 32)
+	panic ("FAILURE: didn't reach beginning of unwind-chain\n");
+    }
+  while ((ret = unw_step (&cursor)) > 0);
+
+  if (ret < 0)
+    panic ("FAILURE: unw_step() returned %d\n", ret);
+}
+
+static void
+b (void)
+{
+  do_backtrace();
+}
+
+static void
+a (void)
+{
+  if (verbose)
+    printf ("do_backtrace() from atexit()-handler:\n");
+  b();
+  if (errors)
+    abort ();	/* cannot portably call exit() from an atexit() handler */
+}
+
+Test_Class::Test_Class (void)
+{
+  if (verbose)
+    printf ("do_backtrace() from constructor:\n");
+  b();
+}
+
+int
+main (int argc, char **argv UNUSED)
+{
+  verbose = argc > 1;
+  return atexit (a);
+}
diff --git a/src/third_party/unwind/dist/tests/Gtest-nomalloc.c b/src/third_party/unwind/dist/tests/Gtest-nomalloc.c
new file mode 100644
index 00000000000..5b97fc70918
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Gtest-nomalloc.c
@@ -0,0 +1,110 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2009 Google, Inc
+	Contributed by Arun Sharma <arun.sharma@google.com>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <dlfcn.h>
+#include <libunwind.h>
+
+#define panic(args...)				\
+	{ fprintf (stderr, args); exit (-1); }
+
+int verbose;
+int num_errors;
+int in_unwind;
+
+void *
+malloc(size_t s)
+{
+  static void * (*func)();
+
+  if(!func)
+    func = (void *(*)()) dlsym(RTLD_NEXT, "malloc");
+
+  if (in_unwind) {
+    num_errors++;
+    return NULL;
+  } else {
+    return func(s);
+  }
+}
+
+static void
+do_backtrace (void)
+{
+  unw_word_t ip, sp;
+  unw_cursor_t cursor;
+  unw_context_t uc;
+  int ret;
+
+  in_unwind = 1;
+  unw_getcontext (&uc);
+  if (unw_init_local (&cursor, &uc) < 0)
+    panic ("unw_init_local failed!\n");
+
+  do
+    {
+      unw_get_reg (&cursor, UNW_REG_IP, &ip);
+      unw_get_reg (&cursor, UNW_REG_SP, &sp);
+
+      ret = unw_step (&cursor);
+      if (ret < 0)
+	{
+	  ++num_errors;
+	}
+    }
+  while (ret > 0);
+  in_unwind = 0;
+}
+
+void
+foo3 (void)
+{
+  do_backtrace ();
+}
+
+void
+foo2 (void)
+{
+  foo3 ();
+}
+
+void
+foo1 (void)
+{
+  foo2 ();
+}
+
+int
+main (void)
+{
+  foo1();
+
+  if (num_errors > 0)
+    {
+      fprintf (stderr, "FAILURE: detected %d errors\n", num_errors);
+      exit (-1);
+    }
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/tests/Gtest-resume-sig-rt.c b/src/third_party/unwind/dist/tests/Gtest-resume-sig-rt.c
new file mode 100644
index 00000000000..df515fc1953
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Gtest-resume-sig-rt.c
@@ -0,0 +1,31 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* The purpose of this test is to invoke different code paths in libunwind (on
+ * some architectures), that are executed when the SA_SIGINFO sigaction() flag
+ * is used.
+ */
+
+#define TEST_WITH_SIGINFO 1
+#include "Gtest-resume-sig.c"
diff --git a/src/third_party/unwind/dist/tests/Gtest-resume-sig.c b/src/third_party/unwind/dist/tests/Gtest-resume-sig.c
new file mode 100644
index 00000000000..18ec65da713
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Gtest-resume-sig.c
@@ -0,0 +1,200 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/*  Verify that unw_resume() restores the signal mask at proper time.  */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include "compiler.h"
+
+#include <libunwind.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+
+#ifdef HAVE_IA64INTRIN_H
+# include <ia64intrin.h>
+#endif
+
+#define panic(args...)						\
+	do { fprintf (stderr, args); ++nerrors; } while (0)
+
+int verbose;
+int nerrors;
+int got_usr1, got_usr2;
+char *sigusr1_sp;
+
+uintptr_t
+get_bsp (void)
+{
+#if UNW_TARGET_IA64
+# ifdef __INTEL_COMPILER
+  return __getReg (_IA64_REG_AR_BSP);
+# else
+  return (uintptr_t) __builtin_ia64_bsp ();
+# endif
+#else
+  return 0;
+#endif
+}
+
+#ifdef TEST_WITH_SIGINFO
+void
+handler (int sig,
+         siginfo_t *si UNUSED,
+         void *ucontext UNUSED)
+#else
+void
+handler (int sig)
+#endif
+{
+  unw_word_t ip;
+  sigset_t mask;
+  unw_context_t uc;
+  unw_cursor_t c;
+  char foo;
+  int ret;
+  // The test rely on SIGUSR2 mask to be cleared when the handler returns.
+  // For local context from the signal handler, there doesn't seem to be a way
+  // currently to set it so just clear the whole struct to make sure the signal mask is cleared.
+  // This should probably be fixed to avoid signal mask being set to random values
+  // by `unw_resume` if the context was not pre-zeroed.,
+  // Using the signal ucontext direction should also work automatically but currently doesn't
+  // on ARM/AArch64 (or any other archs that doesn't have a proper sigreturn implementation)
+  memset(&uc, 0x0, sizeof(uc));
+
+#if UNW_TARGET_IA64
+  if (verbose)
+    printf ("bsp = %llx\n", (unsigned long long) get_bsp ());
+#endif
+
+  if (verbose)
+    printf ("got signal %d\n", sig);
+
+  if (sig == SIGUSR1)
+    {
+      ++got_usr1;
+      sigusr1_sp = &foo;
+
+      sigemptyset (&mask);
+      sigaddset (&mask, SIGUSR2);
+      sigprocmask (SIG_BLOCK, &mask, NULL);
+      kill (getpid (), SIGUSR2);	/* pend SIGUSR2 */
+
+      signal (SIGUSR1, SIG_IGN);
+
+      if ((ret = unw_getcontext (&uc)) < 0)
+	panic ("unw_getcontext() failed: ret=%d\n", ret);
+      if ((ret = unw_init_local (&c, &uc)) < 0)
+	panic ("unw_init_local() failed: ret=%d\n", ret);
+
+      if ((ret = unw_step (&c)) < 0)		/* step to signal trampoline */
+	panic ("unw_step(1) failed: ret=%d\n", ret);
+
+      if ((ret = unw_step (&c)) < 0)		/* step to kill() */
+	panic ("unw_step(2) failed: ret=%d\n", ret);
+
+#if defined(UNW_TARGET_TILEGX)
+      if ((ret = unw_step (&c)) < 0)		/* step to signal trampoline */
+	panic ("unw_step(2) failed: ret=%d\n", ret);
+#endif
+
+      if ((ret = unw_get_reg (&c, UNW_REG_IP, &ip)) < 0)
+	panic ("unw_get_reg(IP) failed: ret=%d\n", ret);
+      if (verbose)
+	printf ("resuming at 0x%lx, with SIGUSR2 pending\n",
+		(unsigned long) ip);
+      unw_resume (&c);
+    }
+  else if (sig == SIGUSR2)
+    {
+      ++got_usr2;
+      if (got_usr1)
+	{
+	  if (verbose)
+	    printf ("OK: stack still at %p\n", &foo);
+	}
+      signal (SIGUSR2, SIG_IGN);
+    }
+  else
+    panic ("Got unexpected signal %d\n", sig);
+}
+
+int
+main (int argc, char **argv UNUSED)
+{
+  struct sigaction sa;
+  float d = 1.0;
+  int n = 0;
+
+  if (argc > 1)
+    verbose = 1;
+
+  memset (&sa, 0, sizeof(sa));
+#ifdef TEST_WITH_SIGINFO
+  sa.sa_sigaction = handler;
+  sa.sa_flags = SA_SIGINFO;
+#else
+  sa.sa_handler = handler;
+#endif
+
+  if (sigaction (SIGUSR1, &sa, NULL) != 0 ||
+      sigaction (SIGUSR2, &sa, NULL) != 0)
+    {
+      fprintf (stderr, "sigaction() failed: %s\n", strerror (errno));
+      return -1;
+    }
+
+  /* Use the FPU a bit; otherwise we get spurious errors should the
+     signal handler need to use the FPU for any reason.  This seems to
+     happen on x86-64.  */
+  while (d > 0.0)
+    {
+      d /= 2.0;
+      ++n;
+    }
+  if (n > 9999)
+    return -1;	/* can't happen, but don't tell the compiler... */
+
+  if (verbose)
+    printf ("sending SIGUSR1\n");
+  kill (getpid (), SIGUSR1);
+
+  if (!got_usr2)
+    panic ("failed to get SIGUSR2\n");
+
+  if (nerrors)
+    {
+      fprintf (stderr, "FAILURE: detected %d errors\n", nerrors);
+      exit (-1);
+    }
+
+  if (verbose)
+    printf ("SUCCESS\n");
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/tests/Gtest-trace.c b/src/third_party/unwind/dist/tests/Gtest-trace.c
new file mode 100644
index 00000000000..fc1f646eac6
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Gtest-trace.c
@@ -0,0 +1,282 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2010, 2011 by FERMI NATIONAL ACCELERATOR LABORATORY
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include "compiler.h"
+
+#include <errno.h>
+#if HAVE_EXECINFO_H
+# include <execinfo.h>
+#else
+  extern int backtrace (void **, int);
+#endif
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ucontext.h>
+#include <unistd.h>
+#include <libunwind.h>
+
+#define panic(args...)				\
+	{ fprintf (stderr, args); exit (-1); }
+
+#define SIG_STACK_SIZE 0x100000
+
+int verbose;
+int num_errors;
+
+/* These variables are global because they
+ * cause the signal stack to overflow */
+char buf[512], name[256];
+void *addresses[3][128];
+unw_cursor_t cursor;
+unw_context_t uc;
+
+static void
+do_backtrace (void)
+{
+  unw_word_t ip;
+  int ret = -UNW_ENOINFO;
+  int depth = 0;
+  int i, n, m;
+
+  if (verbose)
+    printf ("\tnormal trace:\n");
+
+  unw_getcontext (&uc);
+  if (unw_init_local (&cursor, &uc) < 0)
+    panic ("unw_init_local failed!\n");
+
+  do
+    {
+      unw_get_reg (&cursor, UNW_REG_IP, &ip);
+      addresses[0][depth] = (void *) ip;
+    }
+  while ((ret = unw_step (&cursor)) > 0 && ++depth < 128);
+
+  if (ret < 0)
+    {
+      unw_get_reg (&cursor, UNW_REG_IP, &ip);
+      printf ("FAILURE: unw_step() returned %d for ip=%lx\n", ret, (long) ip);
+      ++num_errors;
+    }
+
+  if (verbose)
+    for (i = 0; i < depth; ++i)
+      printf ("\t #%-3d ip=%p\n", i, addresses[0][i]);
+
+  if (verbose)
+    printf ("\n\tvia backtrace():\n");
+
+  n = backtrace (addresses[1], 128);
+
+  if (verbose)
+    for (i = 0; i < n; ++i)
+	printf ("\t #%-3d ip=%p\n", i, addresses[1][i]);
+
+  if (verbose)
+    printf ("\n\tvia unw_backtrace():\n");
+
+  m = unw_backtrace (addresses[2], 128);
+
+  if (verbose)
+    for (i = 0; i < m; ++i)
+	printf ("\t #%-3d ip=%p\n", i, addresses[2][i]);
+
+  if (m != depth+1)
+    {
+      printf ("FAILURE: unw_step() loop and unw_backtrace() depths differ: %d vs. %d\n", depth, m);
+      ++num_errors;
+    }
+
+  if (n != depth+1)
+    {
+      printf ("FAILURE: unw_step() loop and backtrace() depths differ: %d vs. %d\n", depth, n);
+      ++num_errors;
+    }
+
+  if (n == m)
+    for (i = 1; i < n; ++i)
+      /* Allow one in difference in comparison, trace returns adjusted addresses. */
+      if (labs((unw_word_t) addresses[1][i] - (unw_word_t) addresses[2][i]) > 1)
+	{
+          printf ("FAILURE: backtrace() and unw_backtrace() addresses differ at %d: %p vs. %p\n",
+                  i, addresses[1][i], addresses[2][i]);
+          ++num_errors;
+	}
+
+  if (n == depth+1)
+    for (i = 1; i < depth; ++i)
+      /* Allow one in difference in comparison, trace returns adjusted addresses. */
+      if (labs((unw_word_t) addresses[0][i] - (unw_word_t) addresses[1][i]) > 1)
+	{
+          printf ("FAILURE: unw_step() loop and backtrace() addresses differ at %d: %p vs. %p\n",
+                  i, addresses[0][i], addresses[1][i]);
+          ++num_errors;
+	}
+}
+
+void
+foo (long val UNUSED)
+{
+  do_backtrace ();
+}
+
+void
+bar (long v)
+{
+  extern long f (long);
+  int arr[v];
+
+  /* This is a vain attempt to use up lots of registers to force
+     the frame-chain info to be saved on the memory stack on ia64.
+     It happens to work with gcc v3.3.4 and gcc v3.4.1 but perhaps
+     not with any other compiler.  */
+  foo (f (arr[0]) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + f (v))
+       ))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))
+       )))))))))))))))))))))))))))))))))))))))))))))))))))))));
+}
+
+void
+sighandler (int signal, void *siginfo UNUSED, void *context)
+{
+  ucontext_t *uc UNUSED;
+  int sp;
+
+  uc = context;
+
+  if (verbose)
+    {
+      printf ("sighandler: got signal %d, sp=%p", signal, &sp);
+#if UNW_TARGET_IA64
+# if defined(__linux__)
+      printf (" @ %lx", uc->uc_mcontext.sc_ip);
+# else
+      {
+	uint16_t reason;
+	uint64_t ip;
+
+	__uc_get_reason (uc, &reason);
+	__uc_get_ip (uc, &ip);
+	printf (" @ %lx (reason=%d)", ip, reason);
+      }
+# endif
+#elif UNW_TARGET_X86
+#if defined __linux__
+      printf (" @ %lx", (unsigned long) uc->uc_mcontext.gregs[REG_EIP]);
+#elif defined __FreeBSD__
+      printf (" @ %lx", (unsigned long) uc->uc_mcontext.mc_eip);
+#endif
+#elif UNW_TARGET_X86_64
+#if defined __linux__
+      printf (" @ %lx", (unsigned long) uc->uc_mcontext.gregs[REG_RIP]);
+#elif defined __FreeBSD__
+      printf (" @ %lx", (unsigned long) uc->uc_mcontext.mc_rip);
+#endif
+#elif defined UNW_TARGET_ARM
+#if defined __linux__
+      printf (" @ %lx", (unsigned long) uc->uc_mcontext.arm_pc);
+#elif defined __FreeBSD__
+      printf (" @ %lx", (unsigned long) uc->uc_mcontext.__gregs[_REG_PC]);
+#endif
+#endif
+      printf ("\n");
+    }
+  do_backtrace();
+}
+
+int
+main (int argc, char **argv UNUSED)
+{
+  struct sigaction act;
+  stack_t stk;
+
+  verbose = (argc > 1);
+
+  if (verbose)
+    printf ("Normal backtrace:\n");
+
+  bar (1);
+
+  memset (&act, 0, sizeof (act));
+  act.sa_handler = (void (*)(int)) sighandler;
+  act.sa_flags = SA_SIGINFO;
+  if (sigaction (SIGTERM, &act, NULL) < 0)
+    panic ("sigaction: %s\n", strerror (errno));
+
+  if (verbose)
+    printf ("\nBacktrace across signal handler:\n");
+  kill (getpid (), SIGTERM);
+
+  if (verbose)
+    printf ("\nBacktrace across signal handler on alternate stack:\n");
+  stk.ss_sp = malloc (SIG_STACK_SIZE);
+  if (!stk.ss_sp)
+    panic ("failed to allocate %u bytes\n", SIG_STACK_SIZE);
+  stk.ss_size = SIG_STACK_SIZE;
+  stk.ss_flags = 0;
+  if (sigaltstack (&stk, NULL) < 0)
+    panic ("sigaltstack: %s\n", strerror (errno));
+
+  memset (&act, 0, sizeof (act));
+  act.sa_handler = (void (*)(int)) sighandler;
+  act.sa_flags = SA_ONSTACK | SA_SIGINFO;
+  if (sigaction (SIGTERM, &act, NULL) < 0)
+    panic ("sigaction: %s\n", strerror (errno));
+  kill (getpid (), SIGTERM);
+
+  if (num_errors > 0)
+    {
+      fprintf (stderr, "FAILURE: detected %d errors\n", num_errors);
+      exit (-1);
+    }
+
+  if (verbose)
+    printf ("SUCCESS.\n");
+
+  signal (SIGTERM, SIG_DFL);
+  stk.ss_flags = SS_DISABLE;
+  sigaltstack (&stk, NULL);
+  free (stk.ss_sp);
+
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/tests/Gx64-test-dwarf-expressions.c b/src/third_party/unwind/dist/tests/Gx64-test-dwarf-expressions.c
new file mode 100644
index 00000000000..209f8713124
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Gx64-test-dwarf-expressions.c
@@ -0,0 +1,68 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#include <libunwind.h>
+
+static int verbose;
+static int nerrors;
+
+#define panic(args...)							  \
+	do { printf (args); ++nerrors; } while (0)
+
+// Assembly routine which sets up the stack for the test then calls another one
+// which clobbers the stack, and which in turn calls recover_register below
+extern int64_t DW_CFA_expression_testcase(int64_t regnum, int64_t height);
+
+// recover_register is called by the assembly routines. It returns the value of
+// a register at a specified height from the inner-most frame. The return value
+// is propagated back through the assembly routines to the testcase.
+extern int64_t recover_register(int64_t regnum, int64_t height)
+{
+  // Initialize cursor to current frame
+  int rc, i;
+  unw_cursor_t cursor;
+  unw_context_t context;
+  unw_getcontext(&context);
+  unw_init_local(&cursor, &context);
+  // Unwind frames until required height from inner-most frame (i.e. this one)
+  for (i = 0; i < height; ++i)
+    {
+      rc = unw_step(&cursor);
+      if (rc < 0)
+        panic("%s: unw_step failed on step %d with return code %d", __FUNCTION__, i, rc);
+      else if (rc == 0)
+        panic("%s: unw_step failed to reach the end of the stack", __FUNCTION__);
+      unw_word_t pc;
+      rc = unw_get_reg(&cursor, UNW_REG_IP, &pc);
+      if (rc < 0 || pc == 0)
+        panic("%s: unw_get_reg failed to locate the program counter", __FUNCTION__);
+    }
+  // We're now at the required height, extract register
+  uint64_t value;
+  if ((rc = unw_get_reg(&cursor, (unw_regnum_t) regnum, &value)) != 0)
+    panic("%s: unw_get_reg failed to retrieve register %lu", __FUNCTION__, regnum);
+  return value;
+}
+
+int
+main (int argc, char **argv)
+{
+  if (argc > 1)
+    verbose = 1;
+
+  if (DW_CFA_expression_testcase(12, 1) != 0)
+    panic("r12 should be clobbered at height 1 (DW_CFA_expression_inner)");
+  if (DW_CFA_expression_testcase(12, 2) != 111222333)
+    panic("r12 should be restored at height 2 (DW_CFA_expression_testcase)");
+
+  if (nerrors > 0)
+    {
+      fprintf (stderr, "FAILURE: detected %d errors\n", nerrors);
+      exit (-1);
+    }
+
+  if (verbose)
+    printf ("SUCCESS.\n");
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/tests/Lia64-test-nat.c b/src/third_party/unwind/dist/tests/Lia64-test-nat.c
new file mode 100644
index 00000000000..15ef0caccc0
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Lia64-test-nat.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if !defined(UNW_REMOTE_ONLY)
+#include "Gia64-test-nat.c"
+#endif
diff --git a/src/third_party/unwind/dist/tests/Lia64-test-rbs.c b/src/third_party/unwind/dist/tests/Lia64-test-rbs.c
new file mode 100644
index 00000000000..b838ebe42f7
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Lia64-test-rbs.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if !defined(UNW_REMOTE_ONLY)
+#include "Gia64-test-rbs.c"
+#endif
diff --git a/src/third_party/unwind/dist/tests/Lia64-test-readonly.c b/src/third_party/unwind/dist/tests/Lia64-test-readonly.c
new file mode 100644
index 00000000000..cd23e92613e
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Lia64-test-readonly.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if !defined(UNW_REMOTE_ONLY)
+#include "Gia64-test-readonly.c"
+#endif
diff --git a/src/third_party/unwind/dist/tests/Lia64-test-stack.c b/src/third_party/unwind/dist/tests/Lia64-test-stack.c
new file mode 100644
index 00000000000..3647629c90b
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Lia64-test-stack.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if !defined(UNW_REMOTE_ONLY)
+#include "Gia64-test-stack.c"
+#endif
diff --git a/src/third_party/unwind/dist/tests/Lperf-simple.c b/src/third_party/unwind/dist/tests/Lperf-simple.c
new file mode 100644
index 00000000000..cdf38c207a0
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Lperf-simple.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if !defined(UNW_REMOTE_ONLY)
+#include "Gperf-simple.c"
+#endif
diff --git a/src/third_party/unwind/dist/tests/Lperf-trace.c b/src/third_party/unwind/dist/tests/Lperf-trace.c
new file mode 100644
index 00000000000..1c3cf21c213
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Lperf-trace.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if !defined(UNW_REMOTE_ONLY)
+#include "Gperf-trace.c"
+#endif
diff --git a/src/third_party/unwind/dist/tests/Lrs-race.c b/src/third_party/unwind/dist/tests/Lrs-race.c
new file mode 100644
index 00000000000..6fe4972020d
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Lrs-race.c
@@ -0,0 +1,1514 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2005 Hewlett-Packard Co
+	Contributed by Paul Pluzhnikov <ppluzhnikov@google.com>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/*  Verify that register state caches work under all caching policies
+    in a multi-threaded environment with a large number IPs */
+
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#include "compiler.h"
+
+#include <stdio.h>
+#include <pthread.h>
+#include <stdlib.h>
+
+/* ITERS=1000, NTHREAD=10 caught some bugs in the past */
+#ifndef ITERS 
+#define ITERS 100
+#endif
+
+#ifndef NTHREAD
+#define NTHREAD 2
+#endif
+
+int verbose;
+
+void
+foo_0 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_1 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_2 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_3 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_4 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_5 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_6 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_7 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_8 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_9 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_10 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_11 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_12 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_13 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_14 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_15 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_16 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_17 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_18 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_19 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_20 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_21 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_22 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_23 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_24 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_25 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_26 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_27 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_28 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_29 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_30 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_31 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_32 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_33 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_34 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_35 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_36 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_37 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_38 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_39 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_40 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_41 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_42 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_43 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_44 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_45 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_46 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_47 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_48 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_49 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_50 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_51 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_52 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_53 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_54 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_55 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_56 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_57 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_58 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_59 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_60 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_61 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_62 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_63 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_64 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_65 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_66 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_67 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_68 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_69 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_70 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_71 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_72 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_73 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_74 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_75 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_76 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_77 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_78 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_79 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_80 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_81 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_82 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_83 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_84 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_85 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_86 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_87 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_88 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_89 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_90 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_91 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_92 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_93 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_94 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_95 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_96 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_97 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_98 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_99 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_100 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_101 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_102 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_103 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_104 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_105 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_106 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_107 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_108 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_109 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_110 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_111 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_112 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_113 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_114 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_115 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_116 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_117 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_118 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_119 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_120 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_121 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_122 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_123 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_124 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_125 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_126 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_127 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void
+foo_128 (void)
+{
+  void *buf[20];
+  int n;
+
+  if ((n = unw_backtrace (buf, 20)) < 3)
+    abort ();
+}
+
+void *
+bar(void *p UNUSED)
+{
+  int i;
+  for (i = 0; i < ITERS; ++i) {
+    foo_0 ();
+    foo_1 ();
+    foo_2 ();
+    foo_3 ();
+    foo_4 ();
+    foo_5 ();
+    foo_6 ();
+    foo_7 ();
+    foo_8 ();
+    foo_9 ();
+    foo_10 ();
+    foo_11 ();
+    foo_12 ();
+    foo_13 ();
+    foo_14 ();
+    foo_15 ();
+    foo_16 ();
+    foo_17 ();
+    foo_18 ();
+    foo_19 ();
+    foo_20 ();
+    foo_21 ();
+    foo_22 ();
+    foo_23 ();
+    foo_24 ();
+    foo_25 ();
+    foo_26 ();
+    foo_27 ();
+    foo_28 ();
+    foo_29 ();
+    foo_30 ();
+    foo_31 ();
+    foo_32 ();
+    foo_33 ();
+    foo_34 ();
+    foo_35 ();
+    foo_36 ();
+    foo_37 ();
+    foo_38 ();
+    foo_39 ();
+    foo_40 ();
+    foo_41 ();
+    foo_42 ();
+    foo_43 ();
+    foo_44 ();
+    foo_45 ();
+    foo_46 ();
+    foo_47 ();
+    foo_48 ();
+    foo_49 ();
+    foo_50 ();
+    foo_51 ();
+    foo_52 ();
+    foo_53 ();
+    foo_54 ();
+    foo_55 ();
+    foo_56 ();
+    foo_57 ();
+    foo_58 ();
+    foo_59 ();
+    foo_60 ();
+    foo_61 ();
+    foo_62 ();
+    foo_63 ();
+    foo_64 ();
+    foo_65 ();
+    foo_66 ();
+    foo_67 ();
+    foo_68 ();
+    foo_69 ();
+    foo_70 ();
+    foo_71 ();
+    foo_72 ();
+    foo_73 ();
+    foo_74 ();
+    foo_75 ();
+    foo_76 ();
+    foo_77 ();
+    foo_78 ();
+    foo_79 ();
+    foo_80 ();
+    foo_81 ();
+    foo_82 ();
+    foo_83 ();
+    foo_84 ();
+    foo_85 ();
+    foo_86 ();
+    foo_87 ();
+    foo_88 ();
+    foo_89 ();
+    foo_90 ();
+    foo_91 ();
+    foo_92 ();
+    foo_93 ();
+    foo_94 ();
+    foo_95 ();
+    foo_96 ();
+    foo_97 ();
+    foo_98 ();
+    foo_99 ();
+    foo_100 ();
+    foo_101 ();
+    foo_102 ();
+    foo_103 ();
+    foo_104 ();
+    foo_105 ();
+    foo_106 ();
+    foo_107 ();
+    foo_108 ();
+    foo_109 ();
+    foo_110 ();
+    foo_111 ();
+    foo_112 ();
+    foo_113 ();
+    foo_114 ();
+    foo_115 ();
+    foo_116 ();
+    foo_117 ();
+    foo_118 ();
+    foo_119 ();
+    foo_120 ();
+    foo_121 ();
+    foo_122 ();
+    foo_123 ();
+    foo_124 ();
+    foo_125 ();
+    foo_126 ();
+    foo_127 ();
+    foo_128 ();
+  }
+  return NULL;
+}
+
+int doit (void)
+{
+  pthread_t tid[NTHREAD];
+  int i;
+
+  for (i = 0; i < NTHREAD; ++i)
+    if (pthread_create (&tid[i], NULL, bar, NULL))
+      return 1;
+
+  for (i = 0; i < NTHREAD; ++i)
+    if (pthread_join (tid[i], NULL))
+      return 1;
+
+  return 0;
+}
+
+int
+main (int argc, char **argv UNUSED)
+{
+  if (argc > 1)
+    verbose = 1;
+
+  if (verbose)
+    printf ("Caching: none\n");
+  unw_set_caching_policy (unw_local_addr_space, UNW_CACHE_NONE);
+  doit ();
+
+  if (verbose)
+    printf ("Caching: global\n");
+  unw_set_caching_policy (unw_local_addr_space, UNW_CACHE_GLOBAL);
+  doit ();
+
+  if (verbose)
+    printf ("Caching: per-thread\n");
+  unw_set_caching_policy (unw_local_addr_space, UNW_CACHE_PER_THREAD);
+  doit ();
+
+  if (verbose)
+    printf ("SUCCESS\n");
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/tests/Ltest-bt.c b/src/third_party/unwind/dist/tests/Ltest-bt.c
new file mode 100644
index 00000000000..3489bf0b51e
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Ltest-bt.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if !defined(UNW_REMOTE_ONLY)
+#include "Gtest-bt.c"
+#endif
diff --git a/src/third_party/unwind/dist/tests/Ltest-concurrent.c b/src/third_party/unwind/dist/tests/Ltest-concurrent.c
new file mode 100644
index 00000000000..9462607ec8f
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Ltest-concurrent.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if !defined(UNW_REMOTE_ONLY)
+#include "Gtest-concurrent.c"
+#endif
diff --git a/src/third_party/unwind/dist/tests/Ltest-cxx-exceptions.cxx b/src/third_party/unwind/dist/tests/Ltest-cxx-exceptions.cxx
new file mode 100644
index 00000000000..24bcd13e3dc
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Ltest-cxx-exceptions.cxx
@@ -0,0 +1,80 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2010 stefan.demharter@gmx.net
+   Copyright (C) 2010 arun.sharma@google.com
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <libunwind.h>
+#include "compiler.h"
+
+#define panic(args...)				\
+	{ fprintf (stderr, args); exit (-1); }
+
+static int verbose;
+
+struct Test
+{
+  public: // --- ctor/dtor ---
+    Test() { ++counter_; }
+    ~Test() { -- counter_; }
+    Test(const Test&) { ++counter_; }
+
+  public: // --- static members ---
+    static int counter_;
+};
+
+int Test::counter_ = 0;
+
+// Called by foo
+extern "C" void bar()
+{
+  Test t;
+  try {
+    Test t;
+    throw 5;
+  } catch (...) {
+    Test t;
+    if (verbose)
+      printf("Throwing an int\n");
+    throw 6;
+  }
+}
+
+int main(int argc, char **argv UNUSED)
+{
+  if (argc > 1)
+    verbose = 1;
+  try {
+    Test t;
+    bar();
+  } catch (int) {
+    // Dtor of all Test-object has to be called.
+    if (Test::counter_ != 0)
+      panic("Counter non-zero\n");
+    return Test::counter_;
+  } catch (...) {
+    // An int was thrown - we should not get here.
+    panic("Int was thrown why are we here?\n");
+  }
+  exit(0);
+}
diff --git a/src/third_party/unwind/dist/tests/Ltest-dyn1.c b/src/third_party/unwind/dist/tests/Ltest-dyn1.c
new file mode 100644
index 00000000000..c2cab6b9a06
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Ltest-dyn1.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if !defined(UNW_REMOTE_ONLY)
+#include "Gtest-dyn1.c"
+#endif
diff --git a/src/third_party/unwind/dist/tests/Ltest-exc.c b/src/third_party/unwind/dist/tests/Ltest-exc.c
new file mode 100644
index 00000000000..36a234ca82c
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Ltest-exc.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if !defined(UNW_REMOTE_ONLY)
+#include "Gtest-exc.c"
+#endif
diff --git a/src/third_party/unwind/dist/tests/Ltest-init-local-signal-lib.c b/src/third_party/unwind/dist/tests/Ltest-init-local-signal-lib.c
new file mode 100644
index 00000000000..7474f71f49d
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Ltest-init-local-signal-lib.c
@@ -0,0 +1,6 @@
+#include <stdio.h>
+
+/* To prevent inlining and optimizing away */
+int foo(volatile int* f) {
+  return *f;
+}
diff --git a/src/third_party/unwind/dist/tests/Ltest-init-local-signal.c b/src/third_party/unwind/dist/tests/Ltest-init-local-signal.c
new file mode 100644
index 00000000000..4bde218f3bb
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Ltest-init-local-signal.c
@@ -0,0 +1,60 @@
+#include "libunwind.h"
+#include <sys/types.h>
+#include <unistd.h>
+#include <string.h>
+
+#include <stdlib.h>
+
+#include <signal.h>
+#include <stdio.h>
+#include <assert.h>
+
+int stepper(unw_cursor_t* c) {
+  int steps = 0;
+  int ret = 1;
+  while (ret) {
+
+    ret = unw_step(c);
+    if (!ret) {
+      break;
+    }
+    steps++;
+  }
+  return steps;
+}
+
+/* Verify that we can step from both ucontext, and from getcontext()
+ * roughly the same.  This tests that the IP from ucontext is used
+ * correctly (see impl of unw_init_local2) */
+void handler(int num, siginfo_t* info, void* ucontext) {
+  unw_cursor_t c;
+  unw_context_t context;
+  unw_getcontext(&context);
+  int ret = unw_init_local2(&c, ucontext, UNW_INIT_SIGNAL_FRAME);
+  assert(!ret);
+  int ucontext_steps = stepper(&c);
+
+  ret = unw_init_local(&c, &context);
+  (void)ret;
+  assert(!ret);
+  int getcontext_steps = stepper(&c);
+  if (ucontext_steps == getcontext_steps - 2) {
+    exit(0);
+  }
+  printf("unw_getcontext steps was %i, ucontext steps was %i, should be %i\n",
+	 getcontext_steps, ucontext_steps, getcontext_steps - 2);
+  exit(-1);
+}
+
+int foo(volatile int* f);
+
+int main(){
+  struct sigaction a;
+  memset(&a, 0, sizeof(struct sigaction));
+  a.sa_sigaction = &handler;
+  a.sa_flags = SA_SIGINFO;
+  sigaction(SIGSEGV, &a, NULL);
+
+  foo(NULL);
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/tests/Ltest-init.cxx b/src/third_party/unwind/dist/tests/Ltest-init.cxx
new file mode 100644
index 00000000000..58a6ea42798
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Ltest-init.cxx
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if !defined(UNW_REMOTE_ONLY)
+#include "Gtest-init.cxx"
+#endif
diff --git a/src/third_party/unwind/dist/tests/Ltest-mem-validate.c b/src/third_party/unwind/dist/tests/Ltest-mem-validate.c
new file mode 100644
index 00000000000..e5127b90628
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Ltest-mem-validate.c
@@ -0,0 +1,145 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Copyright (c) 2003 Hewlett-Packard Co.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "compiler.h"
+
+#include <libunwind.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <sys/resource.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+#define panic(args...)				\
+	{ fprintf (stderr, args); exit (-1); }
+
+void * stack_start;
+
+#define PAGE_SIZE 4096
+
+void do_backtrace (void)
+{
+  void* buffer[1024];
+  int size = 1024;
+  mprotect((void*)((uintptr_t)stack_start & ~(PAGE_SIZE - 1)),
+           PAGE_SIZE, PROT_NONE);
+
+  unw_cursor_t cursor;
+  unw_word_t ip, sp;
+  unw_context_t uc;
+  int ret;
+  int steps = 0;
+
+  unw_getcontext (&uc);
+  if (unw_init_local (&cursor, &uc) < 0)
+    panic ("unw_init_local failed!\n");
+
+  do
+    {
+      unw_get_reg (&cursor, UNW_REG_IP, &ip);
+      unw_get_reg (&cursor, UNW_REG_SP, &sp);
+
+      ret = unw_step (&cursor);
+      if (ret < 0)
+	{
+	  unw_get_reg (&cursor, UNW_REG_IP, &ip);
+	}
+      steps ++;
+    }
+  while (ret > 0);
+
+  if (steps < 5)
+    {
+      exit(-1);
+    }
+
+  mprotect((void*)((uintptr_t)stack_start & ~(PAGE_SIZE - 1)),
+           PAGE_SIZE, PROT_READ|PROT_WRITE);
+}
+
+void consume_and_run (int depth)
+{
+  unw_cursor_t cursor;
+  unw_context_t uc;
+  char string[1024];
+
+  sprintf (string, "hello %p %p\n", &cursor, &uc);
+  if (depth == 0) {
+    do_backtrace();
+  } else {
+    consume_and_run(depth - 1);
+  }
+}
+
+int
+main (int argc, char **argv UNUSED)
+{
+  int start;
+  unw_context_t uc;
+  unw_cursor_t cursor;
+
+  stack_start = &start;
+
+  // Initialize pipe mem validate check, opens file descriptors
+  unw_getcontext(&uc);
+  if (unw_init_local (&cursor, &uc) < 0)
+    panic ("unw_init_local failed!\n");
+
+  int i;
+  for (i = 3; i < 10; i++)
+    {
+
+      pid_t childpid = fork();
+      if (!childpid)
+        {
+          /* Close fds and make sure we still work */
+          int ret = close(i);
+        }
+
+      int status;
+      if (childpid)
+        {
+          wait(&status);
+          if (WIFEXITED(status))
+              return WEXITSTATUS(status);
+          else
+            return -1;
+        }
+      else
+        {
+          consume_and_run (10);
+
+          return 0;
+        }
+    }
+
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/tests/Ltest-nocalloc.c b/src/third_party/unwind/dist/tests/Ltest-nocalloc.c
new file mode 100644
index 00000000000..f5c31b2a3ee
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Ltest-nocalloc.c
@@ -0,0 +1,137 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2011 Google, Inc
+	Contributed by Paul Pluzhnikov <ppluzhnikov@google.com>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <dlfcn.h>
+#include <pthread.h>
+
+#define panic(args...)				\
+	{ fprintf (stderr, args); exit (-1); }
+
+int num_mallocs;
+int num_callocs;
+int in_unwind;
+
+void *
+calloc(size_t n, size_t s)
+{
+  static void * (*func)(size_t, size_t);
+
+#ifdef __GLIBC__
+  /* In glibc, dlsym() calls calloc. Calling dlsym(RTLD_NEXT, "calloc") here
+     causes infinite recursion.  Instead, we simply use it by its other
+     name.  */
+  extern void *__libc_calloc(size_t, size_t);
+  if (!func)
+    func = &__libc_calloc;
+#else
+  if(!func)
+    func = dlsym(RTLD_NEXT, "calloc");
+#endif
+
+  if (in_unwind) {
+    num_callocs++;
+    return NULL;
+  } else {
+    return func(n, s);
+  }
+}
+
+void *
+malloc(size_t s)
+{
+  static void * (*func)(size_t);
+
+  if(!func)
+    func = dlsym(RTLD_NEXT, "malloc");
+
+  if (in_unwind) {
+    num_mallocs++;
+    return NULL;
+  } else {
+    return func(s);
+  }
+}
+
+static void
+do_backtrace (void)
+{
+  const int num_levels = 100;
+  void *pc[num_levels];
+
+  in_unwind = 1;
+  unw_backtrace(pc, num_levels);
+  in_unwind = 0;
+}
+
+void
+foo3 (void)
+{
+  do_backtrace ();
+}
+
+void
+foo2 (void)
+{
+  foo3 ();
+}
+
+void
+foo1 (void)
+{
+  foo2 ();
+}
+
+int
+main (void)
+{
+  int i, num_errors;
+
+  /* Create (and leak) 100 TSDs, then call backtrace()
+     and check that it doesn't call malloc()/calloc().  */
+  for (i = 0; i < 100; ++i) {
+    pthread_key_t key;
+    if (pthread_key_create (&key, NULL))
+      panic ("FAILURE: unable to create key %d\n", i);
+  }
+  /* Call backtrace right after thread creation,
+   * where we are sure that we're not inside malloc */
+  do_backtrace();
+  num_mallocs = num_callocs = 0;
+  foo1 ();
+  num_errors = num_mallocs + num_callocs;
+  if (num_errors > 0)
+    {
+      fprintf (stderr,
+	       "FAILURE: detected %d error%s (malloc: %d, calloc: %d)\n",
+	       num_errors, num_errors > 1 ? "s" : "",
+	       num_mallocs, num_callocs);
+      exit (-1);
+    }
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/tests/Ltest-nomalloc.c b/src/third_party/unwind/dist/tests/Ltest-nomalloc.c
new file mode 100644
index 00000000000..74d6331286c
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Ltest-nomalloc.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if !defined(UNW_REMOTE_ONLY)
+#include "Gtest-nomalloc.c"
+#endif
diff --git a/src/third_party/unwind/dist/tests/Ltest-resume-sig-rt.c b/src/third_party/unwind/dist/tests/Ltest-resume-sig-rt.c
new file mode 100644
index 00000000000..01fd6dc7d78
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Ltest-resume-sig-rt.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if !defined(UNW_REMOTE_ONLY)
+#include "Gtest-resume-sig-rt.c"
+#endif
diff --git a/src/third_party/unwind/dist/tests/Ltest-resume-sig.c b/src/third_party/unwind/dist/tests/Ltest-resume-sig.c
new file mode 100644
index 00000000000..0047b524aae
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Ltest-resume-sig.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if !defined(UNW_REMOTE_ONLY)
+#include "Gtest-resume-sig.c"
+#endif
diff --git a/src/third_party/unwind/dist/tests/Ltest-trace.c b/src/third_party/unwind/dist/tests/Ltest-trace.c
new file mode 100644
index 00000000000..fb0e9c10bdf
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Ltest-trace.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if !defined(UNW_REMOTE_ONLY)
+#include "Gtest-trace.c"
+#endif
diff --git a/src/third_party/unwind/dist/tests/Ltest-varargs.c b/src/third_party/unwind/dist/tests/Ltest-varargs.c
new file mode 100644
index 00000000000..17ac600be62
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Ltest-varargs.c
@@ -0,0 +1,84 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#include "compiler.h"
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+int ok;
+int verbose;
+
+#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ > 3)
+void a (int, ...) __attribute__((optimize(0)));
+void b (void) __attribute__((optimize(0)));
+void c (void) __attribute__((optimize(0)));
+#endif
+
+void NOINLINE
+b (void)
+{
+  void *v[20];
+  int i, n;
+
+  n = unw_backtrace(v, 20);
+
+  /* Check that the number of addresses given by unw_backtrace() looks
+   * reasonable. If the compiler inlined everything, then this check will also
+   * break. */
+  if (n >= 7)
+    ok = 1;
+
+  if (verbose)
+    for (i = 0; i < n; ++i)
+      printf ("[%d] %p\n", i, v[i]);
+}
+
+void NOINLINE
+c (void)
+{
+    b ();
+}
+
+void NOINLINE
+a (int d, ...)
+{
+  switch (d)
+    {
+    case 5:
+      a (4, 2,4);
+      break;
+    case 4:
+      a (3, 1,3,5);
+      break;
+    case 3:
+      a (2, 11, 13, 17, 23);
+      break;
+    case 2:
+      a (1);
+      break;
+    case 1:
+      c ();
+    }
+}
+
+int
+main (int argc, char **argv UNUSED)
+{
+  if (argc > 1)
+    verbose = 1;
+
+  a (5, 3, 4, 5, 6);
+
+  if (!ok)
+    {
+      fprintf (stderr, "FAILURE: expected deeper backtrace.\n");
+      return 1;
+    }
+
+  if (verbose)
+    printf ("SUCCESS.\n");
+
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/tests/Lx64-test-dwarf-expressions.c b/src/third_party/unwind/dist/tests/Lx64-test-dwarf-expressions.c
new file mode 100644
index 00000000000..07e916e60a6
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Lx64-test-dwarf-expressions.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if !defined(UNW_REMOTE_ONLY)
+#include "Gx64-test-dwarf-expressions.c"
+#endif
diff --git a/src/third_party/unwind/dist/tests/Makefile.am b/src/third_party/unwind/dist/tests/Makefile.am
new file mode 100644
index 00000000000..fee8a70bc5d
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Makefile.am
@@ -0,0 +1,249 @@
+AM_CPPFLAGS = -I$(top_srcdir)/include
+
+EXTRA_DIST =	run-ia64-test-dyn1 run-ptrace-mapper run-ptrace-misc	\
+		run-check-namespace run-coredump-unwind \
+		run-coredump-unwind-mdi check-namespace.sh.in \
+		Gtest-nomalloc.c
+
+MAINTAINERCLEANFILES = Makefile.in
+
+noinst_PROGRAMS_arch =
+noinst_PROGRAMS_cdep =
+noinst_PROGRAMS_common =
+check_PROGRAMS_arch =
+check_PROGRAMS_cdep =
+check_PROGRAMS_common = test-proc-info test-static-link \
+			test-strerror
+check_SCRIPTS_arch =
+check_SCRIPTS_cdep =
+check_SCRIPTS_common =	run-check-namespace
+
+if REMOTE_ONLY
+
+perf:
+
+else
+ LIBUNWIND_local = $(top_builddir)/src/libunwind.la
+if ARCH_IA64
+ noinst_PROGRAMS_arch += ia64-test-dyn1
+ check_SCRIPTS_arch +=	run-ia64-test-dyn1
+ check_PROGRAMS_arch +=	Gia64-test-stack Lia64-test-stack		\
+			Gia64-test-nat Lia64-test-nat			\
+			Gia64-test-rbs Lia64-test-rbs			\
+			Gia64-test-readonly Lia64-test-readonly		\
+			ia64-test-setjmp ia64-test-sig
+else #!ARCH_IA64
+if ARCH_PPC64
+if USE_ALTIVEC
+ noinst_PROGRAMS_arch += ppc64-test-altivec
+endif #USE_ALTIVEC
+else  #!ARCH_PPC64
+if ARCH_X86_64
+ check_PROGRAMS_arch +=	Gx64-test-dwarf-expressions Lx64-test-dwarf-expressions
+endif #ARCH X86_64
+endif #!ARCH_PPC64
+endif #!ARCH_IA64
+ check_PROGRAMS_cdep +=	Gtest-bt Ltest-bt Gtest-exc Ltest-exc		 \
+			Gtest-init Ltest-init				 \
+			Gtest-concurrent Ltest-concurrent		 \
+			Gtest-resume-sig Ltest-resume-sig		 \
+			Gtest-resume-sig-rt Ltest-resume-sig-rt		 \
+			Gtest-trace Ltest-trace				 \
+			Ltest-init-local-signal				 \
+			Ltest-mem-validate				 \
+			test-async-sig test-flush-cache test-init-remote \
+			test-mem test-reg-state Ltest-varargs		 \
+			Ltest-nomalloc Ltest-nocalloc Lrs-race
+ noinst_PROGRAMS_cdep += forker Gperf-simple Lperf-simple \
+			Gperf-trace Lperf-trace
+
+if BUILD_PTRACE
+ check_SCRIPTS_cdep += run-ptrace-mapper run-ptrace-misc
+ check_PROGRAMS_cdep += test-ptrace
+ noinst_PROGRAMS_cdep += mapper test-ptrace-misc
+endif
+
+if BUILD_SETJMP
+ check_PROGRAMS_cdep += test-setjmp
+endif
+
+if SUPPORT_CXX_EXCEPTIONS
+ check_PROGRAMS_cdep += Ltest-cxx-exceptions
+endif
+
+if OS_LINUX
+if BUILD_COREDUMP
+ check_SCRIPTS_cdep += run-coredump-unwind
+ noinst_PROGRAMS_cdep += crasher test-coredump-unwind
+
+if HAVE_LZMA
+ check_SCRIPTS_cdep += run-coredump-unwind-mdi
+endif # HAVE_LZMA
+endif # BUILD_COREDUMP
+endif # OS_LINUX
+
+perf: perf-startup Gperf-simple Lperf-simple Lperf-trace
+	@echo "########## Basic performance of generic libunwind:"
+	@./Gperf-simple
+	@echo "########## Basic performance of local-only libunwind:"
+	@./Lperf-simple
+	@echo "########## Performance of fast unwind:"
+	@./Lperf-trace
+	@echo "########## Startup overhead:"
+	@$(srcdir)/perf-startup @arch@
+
+endif
+
+check_PROGRAMS = $(check_PROGRAMS_common) $(check_PROGRAMS_cdep) \
+		 $(check_PROGRAMS_arch)
+check_SCRIPTS =	$(check_SCRIPTS_common) $(check_SCRIPTS_cdep) \
+		$(check_SCRIPTS_arch)
+
+
+TESTS = $(check_PROGRAMS) $(check_SCRIPTS)
+XFAIL_TESTS =
+
+if ARCH_IA64
+ check_PROGRAMS_cdep += Gtest-dyn1 Ltest-dyn1
+endif
+
+# Use if arch defines but does not support PTRACE_SINGLESTEP
+# ptrace request used in the tests.
+XFAIL_TESTS_PTRACE_SINGLESTEP = run-ptrace-mapper run-ptrace-misc
+
+if ARCH_MIPS
+XFAIL_TESTS += $(XFAIL_TESTS_PTRACE_SINGLESTEP)
+endif
+
+if ARCH_ARM
+# ARM Linux kernel >=2.6.39 removed PTRACE_SINGLESTEP emulation
+XFAIL_TESTS += $(XFAIL_TESTS_PTRACE_SINGLESTEP)
+endif
+
+# This is meant for multilib binaries, -m32.
+# ptrace gives EBADREG when testing,
+# but generally everything else works.
+if NO_PTRACE_TEST
+ XFAIL_TESTS += run-ptrace-mapper test-ptrace Ltest-init-local-signal
+endif
+
+noinst_PROGRAMS = $(noinst_PROGRAMS_common) $(noinst_PROGRAMS_cdep) \
+	$(noinst_PROGRAMS_arch)
+
+Lia64_test_readonly_SOURCES = Lia64-test-readonly.c ia64-test-readonly-asm.S
+Gia64_test_readonly_SOURCES = Gia64-test-readonly.c ia64-test-readonly-asm.S
+Lia64_test_stack_SOURCES = Lia64-test-stack.c ia64-test-stack-asm.S \
+				ia64-test-stack.h
+Gia64_test_stack_SOURCES = Gia64-test-stack.c ia64-test-stack-asm.S \
+				ia64-test-stack.h
+Lia64_test_rbs_SOURCES = Lia64-test-rbs.c ia64-test-rbs-asm.S ia64-test-rbs.h
+Gia64_test_rbs_SOURCES = Gia64-test-rbs.c ia64-test-rbs-asm.S ia64-test-rbs.h
+Lia64_test_nat_SOURCES = Lia64-test-nat.c ia64-test-nat-asm.S
+Gia64_test_nat_SOURCES = Gia64-test-nat.c ia64-test-nat-asm.S
+ia64_test_dyn1_SOURCES = ia64-test-dyn1.c ia64-dyn-asm.S flush-cache.S \
+				flush-cache.h
+ppc64_test_altivec_SOURCES = ppc64-test-altivec.c  ppc64-test-altivec-utils.c
+
+
+Gx64_test_dwarf_expressions_SOURCES =  Gx64-test-dwarf-expressions.c \
+																			 x64-test-dwarf-expressions.S
+Lx64_test_dwarf_expressions_SOURCES =  Lx64-test-dwarf-expressions.c \
+																			 x64-test-dwarf-expressions.S
+
+
+Gtest_init_SOURCES = Gtest-init.cxx
+Ltest_init_SOURCES = Ltest-init.cxx
+Ltest_cxx_exceptions_SOURCES = Ltest-cxx-exceptions.cxx
+
+Ltest_init_local_signal_SOURCES = Ltest-init-local-signal.c Ltest-init-local-signal-lib.c
+
+Gtest_dyn1_SOURCES = Gtest-dyn1.c flush-cache.S flush-cache.h
+Ltest_dyn1_SOURCES = Ltest-dyn1.c flush-cache.S flush-cache.h
+test_static_link_SOURCES = test-static-link-loc.c test-static-link-gen.c
+test_static_link_LDFLAGS = -static
+forker_LDFLAGS = -static
+Gtest_bt_SOURCES = Gtest-bt.c ident.c
+Ltest_bt_SOURCES = Ltest-bt.c ident.c
+test_ptrace_misc_SOURCES = test-ptrace-misc.c ident.c
+Ltest_nomalloc_SOURCES = Ltest-nomalloc.c
+Ltest_nocalloc_SOURCES = Ltest-nocalloc.c
+Gtest_trace_SOURCES = Gtest-trace.c ident.c
+Ltest_trace_SOURCES = Ltest-trace.c ident.c
+Ltest_mem_validate_SOURCES = Ltest-mem-validate.c
+
+LIBUNWIND = $(top_builddir)/src/libunwind-$(arch).la
+LIBUNWIND_ptrace = $(top_builddir)/src/libunwind-ptrace.la
+LIBUNWIND_coredump = $(top_builddir)/src/libunwind-coredump.la
+
+if USE_ELF32
+LIBUNWIND_ELF = $(top_builddir)/src/libunwind-elf32.la
+endif
+if USE_ELF64
+LIBUNWIND_ELF = $(top_builddir)/src/libunwind-elf64.la
+endif
+if USE_ELFXX
+LIBUNWIND_ELF = $(top_builddir)/src/libunwind-elfxx.la
+endif
+
+LIBUNWIND_setjmp = $(top_builddir)/src/libunwind-setjmp.la	\
+		   $(LIBUNWIND_ELF) $(LIBUNWIND)
+
+test_async_sig_LDADD = $(LIBUNWIND_local) -lpthread
+test_flush_cache_LDADD = $(LIBUNWIND_local)
+test_init_remote_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+test_mem_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+test_reg_state_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+test_ptrace_LDADD = $(LIBUNWIND_ptrace) $(LIBUNWIND)
+test_proc_info_LDADD = $(LIBUNWIND)
+test_static_link_LDADD = $(LIBUNWIND)
+test_strerror_LDADD = $(LIBUNWIND)
+Lrs_race_LDADD = $(LIBUNWIND_local) -lpthread
+Ltest_varargs_LDADD = $(LIBUNWIND_local)
+Ltest_init_local_signal_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+
+Gtest_bt_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+Gtest_concurrent_LDADD = $(LIBUNWIND) $(LIBUNWIND_local) -lpthread
+Gtest_dyn1_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+Gtest_exc_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+Gtest_init_LDADD = $(LIBUNWIND) $(LIBUNWIND_local) @BACKTRACELIB@
+Gtest_resume_sig_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+Gtest_resume_sig_rt_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+Gperf_simple_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+Gtest_trace_LDADD=$(LIBUNWIND) $(LIBUNWIND_local)
+Gperf_trace_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+
+Ltest_bt_LDADD = $(LIBUNWIND_local)
+Ltest_concurrent_LDADD = $(LIBUNWIND_local) -lpthread
+Ltest_dyn1_LDADD = $(LIBUNWIND_local)
+Ltest_exc_LDADD = $(LIBUNWIND_local)
+Ltest_init_LDADD = $(LIBUNWIND_local)
+Ltest_nomalloc_LDADD = $(LIBUNWIND_local) @DLLIB@
+Ltest_nocalloc_LDADD = $(LIBUNWIND_local) @DLLIB@ -lpthread
+Ltest_resume_sig_LDADD = $(LIBUNWIND_local)
+Ltest_resume_sig_rt_LDADD = $(LIBUNWIND_local)
+Lperf_simple_LDADD = $(LIBUNWIND_local)
+Ltest_trace_LDADD = $(LIBUNWIND_local)
+Lperf_trace_LDADD = $(LIBUNWIND_local)
+Ltest_mem_validate_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+
+test_setjmp_LDADD = $(LIBUNWIND_setjmp)
+ia64_test_setjmp_LDADD = $(LIBUNWIND_setjmp)
+
+if BUILD_COREDUMP
+test_coredump_unwind_LDADD = $(LIBUNWIND_coredump) $(LIBUNWIND) @BACKTRACELIB@
+endif
+
+Gia64_test_nat_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+Gia64_test_stack_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+Gia64_test_rbs_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+Gia64_test_readonly_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+Lia64_test_nat_LDADD = $(LIBUNWIND_local)
+Lia64_test_stack_LDADD = $(LIBUNWIND_local)
+Lia64_test_rbs_LDADD = $(LIBUNWIND_local)
+Lia64_test_readonly_LDADD = $(LIBUNWIND_local)
+ia64_test_dyn1_LDADD = $(LIBUNWIND)
+ia64_test_sig_LDADD = $(LIBUNWIND)
+ppc64_test_altivec_LDADD = $(LIBUNWIND)
+
+Gx64_test_dwarf_expressions_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+Lx64_test_dwarf_expressions_LDADD = $(LIBUNWIND_local)
diff --git a/src/third_party/unwind/dist/tests/Makefile.in b/src/third_party/unwind/dist/tests/Makefile.in
new file mode 100644
index 00000000000..b3c09589072
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Makefile.in
@@ -0,0 +1,2192 @@
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+	$(Gtest_trace_SOURCES) $(Gx64_test_dwarf_expressions_SOURCES) \
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+	$(Ltest_init_local_signal_SOURCES) \
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+	$(Ltest_nomalloc_SOURCES) Ltest-resume-sig.c \
+	Ltest-resume-sig-rt.c $(Ltest_trace_SOURCES) Ltest-varargs.c \
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+LIBLZMA = @LIBLZMA@
+LIBOBJS = @LIBOBJS@
+LIBS = @LIBS@
+LIBTOOL = @LIBTOOL@
+LIPO = @LIPO@
+LN_S = @LN_S@
+LTLIBOBJS = @LTLIBOBJS@
+LT_SYS_LIBRARY_PATH = @LT_SYS_LIBRARY_PATH@
+MAINT = @MAINT@
+MAKEINFO = @MAKEINFO@
+MANIFEST_TOOL = @MANIFEST_TOOL@
+MKDIR_P = @MKDIR_P@
+NM = @NM@
+NMEDIT = @NMEDIT@
+OBJDUMP = @OBJDUMP@
+OBJEXT = @OBJEXT@
+OTOOL = @OTOOL@
+OTOOL64 = @OTOOL64@
+PACKAGE = @PACKAGE@
+PACKAGE_BUGREPORT = @PACKAGE_BUGREPORT@
+PACKAGE_NAME = @PACKAGE_NAME@
+PACKAGE_STRING = @PACKAGE_STRING@
+PACKAGE_TARNAME = @PACKAGE_TARNAME@
+PACKAGE_URL = @PACKAGE_URL@
+PACKAGE_VERSION = @PACKAGE_VERSION@
+PATH_SEPARATOR = @PATH_SEPARATOR@
+PKG_EXTRA = @PKG_EXTRA@
+PKG_MAINTAINER = @PKG_MAINTAINER@
+PKG_MAJOR = @PKG_MAJOR@
+PKG_MINOR = @PKG_MINOR@
+RANLIB = @RANLIB@
+SED = @SED@
+SET_MAKE = @SET_MAKE@
+SHELL = @SHELL@
+STRIP = @STRIP@
+VERSION = @VERSION@
+abs_builddir = @abs_builddir@
+abs_srcdir = @abs_srcdir@
+abs_top_builddir = @abs_top_builddir@
+abs_top_srcdir = @abs_top_srcdir@
+ac_ct_AR = @ac_ct_AR@
+ac_ct_CC = @ac_ct_CC@
+ac_ct_CXX = @ac_ct_CXX@
+ac_ct_DUMPBIN = @ac_ct_DUMPBIN@
+am__include = @am__include@
+am__leading_dot = @am__leading_dot@
+am__quote = @am__quote@
+am__tar = @am__tar@
+am__untar = @am__untar@
+arch = @arch@
+bindir = @bindir@
+build = @build@
+build_alias = @build_alias@
+build_arch = @build_arch@
+build_cpu = @build_cpu@
+build_os = @build_os@
+build_vendor = @build_vendor@
+builddir = @builddir@
+datadir = @datadir@
+datarootdir = @datarootdir@
+docdir = @docdir@
+dvidir = @dvidir@
+enable_cxx_exceptions = @enable_cxx_exceptions@
+enable_debug_frame = @enable_debug_frame@
+exec_prefix = @exec_prefix@
+host = @host@
+host_alias = @host_alias@
+host_cpu = @host_cpu@
+host_os = @host_os@
+host_vendor = @host_vendor@
+htmldir = @htmldir@
+includedir = @includedir@
+infodir = @infodir@
+install_sh = @install_sh@
+libdir = @libdir@
+libexecdir = @libexecdir@
+localedir = @localedir@
+localstatedir = @localstatedir@
+mandir = @mandir@
+mkdir_p = @mkdir_p@
+oldincludedir = @oldincludedir@
+pdfdir = @pdfdir@
+prefix = @prefix@
+program_transform_name = @program_transform_name@
+psdir = @psdir@
+runstatedir = @runstatedir@
+sbindir = @sbindir@
+sharedstatedir = @sharedstatedir@
+srcdir = @srcdir@
+sysconfdir = @sysconfdir@
+target = @target@
+target_alias = @target_alias@
+target_cpu = @target_cpu@
+target_os = @target_os@
+target_vendor = @target_vendor@
+top_build_prefix = @top_build_prefix@
+top_builddir = @top_builddir@
+top_srcdir = @top_srcdir@
+AM_CPPFLAGS = -I$(top_srcdir)/include
+EXTRA_DIST = run-ia64-test-dyn1 run-ptrace-mapper run-ptrace-misc	\
+		run-check-namespace run-coredump-unwind \
+		run-coredump-unwind-mdi check-namespace.sh.in \
+		Gtest-nomalloc.c
+
+MAINTAINERCLEANFILES = Makefile.in
+noinst_PROGRAMS_arch = $(am__append_1) $(am__append_4)
+noinst_PROGRAMS_cdep = $(am__append_7) $(am__append_10) \
+	$(am__append_14)
+noinst_PROGRAMS_common = 
+check_PROGRAMS_arch = $(am__append_3) $(am__append_5)
+check_PROGRAMS_cdep = $(am__append_6) $(am__append_9) $(am__append_11) \
+	$(am__append_12) $(am__append_16)
+check_PROGRAMS_common = test-proc-info test-static-link \
+			test-strerror
+
+check_SCRIPTS_arch = $(am__append_2)
+check_SCRIPTS_cdep = $(am__append_8) $(am__append_13) $(am__append_15)
+check_SCRIPTS_common = run-check-namespace
+@REMOTE_ONLY_FALSE@LIBUNWIND_local = $(top_builddir)/src/libunwind.la
+check_SCRIPTS = $(check_SCRIPTS_common) $(check_SCRIPTS_cdep) \
+		$(check_SCRIPTS_arch)
+
+TESTS = $(check_PROGRAMS) $(check_SCRIPTS)
+
+# Use if arch defines but does not support PTRACE_SINGLESTEP
+# ptrace request used in the tests.
+XFAIL_TESTS_PTRACE_SINGLESTEP = run-ptrace-mapper run-ptrace-misc
+Lia64_test_readonly_SOURCES = Lia64-test-readonly.c ia64-test-readonly-asm.S
+Gia64_test_readonly_SOURCES = Gia64-test-readonly.c ia64-test-readonly-asm.S
+Lia64_test_stack_SOURCES = Lia64-test-stack.c ia64-test-stack-asm.S \
+				ia64-test-stack.h
+
+Gia64_test_stack_SOURCES = Gia64-test-stack.c ia64-test-stack-asm.S \
+				ia64-test-stack.h
+
+Lia64_test_rbs_SOURCES = Lia64-test-rbs.c ia64-test-rbs-asm.S ia64-test-rbs.h
+Gia64_test_rbs_SOURCES = Gia64-test-rbs.c ia64-test-rbs-asm.S ia64-test-rbs.h
+Lia64_test_nat_SOURCES = Lia64-test-nat.c ia64-test-nat-asm.S
+Gia64_test_nat_SOURCES = Gia64-test-nat.c ia64-test-nat-asm.S
+ia64_test_dyn1_SOURCES = ia64-test-dyn1.c ia64-dyn-asm.S flush-cache.S \
+				flush-cache.h
+
+ppc64_test_altivec_SOURCES = ppc64-test-altivec.c  ppc64-test-altivec-utils.c
+Gx64_test_dwarf_expressions_SOURCES = Gx64-test-dwarf-expressions.c \
+																			 x64-test-dwarf-expressions.S
+
+Lx64_test_dwarf_expressions_SOURCES = Lx64-test-dwarf-expressions.c \
+																			 x64-test-dwarf-expressions.S
+
+Gtest_init_SOURCES = Gtest-init.cxx
+Ltest_init_SOURCES = Ltest-init.cxx
+Ltest_cxx_exceptions_SOURCES = Ltest-cxx-exceptions.cxx
+Ltest_init_local_signal_SOURCES = Ltest-init-local-signal.c Ltest-init-local-signal-lib.c
+Gtest_dyn1_SOURCES = Gtest-dyn1.c flush-cache.S flush-cache.h
+Ltest_dyn1_SOURCES = Ltest-dyn1.c flush-cache.S flush-cache.h
+test_static_link_SOURCES = test-static-link-loc.c test-static-link-gen.c
+test_static_link_LDFLAGS = -static
+forker_LDFLAGS = -static
+Gtest_bt_SOURCES = Gtest-bt.c ident.c
+Ltest_bt_SOURCES = Ltest-bt.c ident.c
+test_ptrace_misc_SOURCES = test-ptrace-misc.c ident.c
+Ltest_nomalloc_SOURCES = Ltest-nomalloc.c
+Ltest_nocalloc_SOURCES = Ltest-nocalloc.c
+Gtest_trace_SOURCES = Gtest-trace.c ident.c
+Ltest_trace_SOURCES = Ltest-trace.c ident.c
+Ltest_mem_validate_SOURCES = Ltest-mem-validate.c
+LIBUNWIND = $(top_builddir)/src/libunwind-$(arch).la
+LIBUNWIND_ptrace = $(top_builddir)/src/libunwind-ptrace.la
+LIBUNWIND_coredump = $(top_builddir)/src/libunwind-coredump.la
+@USE_ELF32_TRUE@LIBUNWIND_ELF = $(top_builddir)/src/libunwind-elf32.la
+@USE_ELF64_TRUE@LIBUNWIND_ELF = $(top_builddir)/src/libunwind-elf64.la
+@USE_ELFXX_TRUE@LIBUNWIND_ELF = $(top_builddir)/src/libunwind-elfxx.la
+LIBUNWIND_setjmp = $(top_builddir)/src/libunwind-setjmp.la	\
+		   $(LIBUNWIND_ELF) $(LIBUNWIND)
+
+test_async_sig_LDADD = $(LIBUNWIND_local) -lpthread
+test_flush_cache_LDADD = $(LIBUNWIND_local)
+test_init_remote_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+test_mem_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+test_reg_state_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+test_ptrace_LDADD = $(LIBUNWIND_ptrace) $(LIBUNWIND)
+test_proc_info_LDADD = $(LIBUNWIND)
+test_static_link_LDADD = $(LIBUNWIND)
+test_strerror_LDADD = $(LIBUNWIND)
+Lrs_race_LDADD = $(LIBUNWIND_local) -lpthread
+Ltest_varargs_LDADD = $(LIBUNWIND_local)
+Ltest_init_local_signal_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+Gtest_bt_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+Gtest_concurrent_LDADD = $(LIBUNWIND) $(LIBUNWIND_local) -lpthread
+Gtest_dyn1_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+Gtest_exc_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+Gtest_init_LDADD = $(LIBUNWIND) $(LIBUNWIND_local) @BACKTRACELIB@
+Gtest_resume_sig_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+Gtest_resume_sig_rt_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+Gperf_simple_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+Gtest_trace_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+Gperf_trace_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+Ltest_bt_LDADD = $(LIBUNWIND_local)
+Ltest_concurrent_LDADD = $(LIBUNWIND_local) -lpthread
+Ltest_dyn1_LDADD = $(LIBUNWIND_local)
+Ltest_exc_LDADD = $(LIBUNWIND_local)
+Ltest_init_LDADD = $(LIBUNWIND_local)
+Ltest_nomalloc_LDADD = $(LIBUNWIND_local) @DLLIB@
+Ltest_nocalloc_LDADD = $(LIBUNWIND_local) @DLLIB@ -lpthread
+Ltest_resume_sig_LDADD = $(LIBUNWIND_local)
+Ltest_resume_sig_rt_LDADD = $(LIBUNWIND_local)
+Lperf_simple_LDADD = $(LIBUNWIND_local)
+Ltest_trace_LDADD = $(LIBUNWIND_local)
+Lperf_trace_LDADD = $(LIBUNWIND_local)
+Ltest_mem_validate_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+test_setjmp_LDADD = $(LIBUNWIND_setjmp)
+ia64_test_setjmp_LDADD = $(LIBUNWIND_setjmp)
+@BUILD_COREDUMP_TRUE@test_coredump_unwind_LDADD = $(LIBUNWIND_coredump) $(LIBUNWIND) @BACKTRACELIB@
+Gia64_test_nat_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+Gia64_test_stack_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+Gia64_test_rbs_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+Gia64_test_readonly_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+Lia64_test_nat_LDADD = $(LIBUNWIND_local)
+Lia64_test_stack_LDADD = $(LIBUNWIND_local)
+Lia64_test_rbs_LDADD = $(LIBUNWIND_local)
+Lia64_test_readonly_LDADD = $(LIBUNWIND_local)
+ia64_test_dyn1_LDADD = $(LIBUNWIND)
+ia64_test_sig_LDADD = $(LIBUNWIND)
+ppc64_test_altivec_LDADD = $(LIBUNWIND)
+Gx64_test_dwarf_expressions_LDADD = $(LIBUNWIND) $(LIBUNWIND_local)
+Lx64_test_dwarf_expressions_LDADD = $(LIBUNWIND_local)
+all: all-am
+
+.SUFFIXES:
+.SUFFIXES: .S .c .cxx .lo .log .o .obj .test .test$(EXEEXT) .trs
+$(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ $(srcdir)/Makefile.am  $(am__configure_deps)
+	@for dep in $?; do \
+	  case '$(am__configure_deps)' in \
+	    *$$dep*) \
+	      ( cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh ) \
+	        && { if test -f $@; then exit 0; else break; fi; }; \
+	      exit 1;; \
+	  esac; \
+	done; \
+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --gnu tests/Makefile'; \
+	$(am__cd) $(top_srcdir) && \
+	  $(AUTOMAKE) --gnu tests/Makefile
+Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
+	@case '$?' in \
+	  *config.status*) \
+	    cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh;; \
+	  *) \
+	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe)'; \
+	    cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe);; \
+	esac;
+
+$(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+
+$(top_srcdir)/configure: @MAINTAINER_MODE_TRUE@ $(am__configure_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(ACLOCAL_M4): @MAINTAINER_MODE_TRUE@ $(am__aclocal_m4_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(am__aclocal_m4_deps):
+check-namespace.sh: $(top_builddir)/config.status $(srcdir)/check-namespace.sh.in
+	cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@
+
+clean-checkPROGRAMS:
+	@list='$(check_PROGRAMS)'; test -n "$$list" || exit 0; \
+	echo " rm -f" $$list; \
+	rm -f $$list || exit $$?; \
+	test -n "$(EXEEXT)" || exit 0; \
+	list=`for p in $$list; do echo "$$p"; done | sed 's/$(EXEEXT)$$//'`; \
+	echo " rm -f" $$list; \
+	rm -f $$list
+
+clean-noinstPROGRAMS:
+	@list='$(noinst_PROGRAMS)'; test -n "$$list" || exit 0; \
+	echo " rm -f" $$list; \
+	rm -f $$list || exit $$?; \
+	test -n "$(EXEEXT)" || exit 0; \
+	list=`for p in $$list; do echo "$$p"; done | sed 's/$(EXEEXT)$$//'`; \
+	echo " rm -f" $$list; \
+	rm -f $$list
+
+Gia64-test-nat$(EXEEXT): $(Gia64_test_nat_OBJECTS) $(Gia64_test_nat_DEPENDENCIES) $(EXTRA_Gia64_test_nat_DEPENDENCIES) 
+	@rm -f Gia64-test-nat$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(Gia64_test_nat_OBJECTS) $(Gia64_test_nat_LDADD) $(LIBS)
+
+Gia64-test-rbs$(EXEEXT): $(Gia64_test_rbs_OBJECTS) $(Gia64_test_rbs_DEPENDENCIES) $(EXTRA_Gia64_test_rbs_DEPENDENCIES) 
+	@rm -f Gia64-test-rbs$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(Gia64_test_rbs_OBJECTS) $(Gia64_test_rbs_LDADD) $(LIBS)
+
+Gia64-test-readonly$(EXEEXT): $(Gia64_test_readonly_OBJECTS) $(Gia64_test_readonly_DEPENDENCIES) $(EXTRA_Gia64_test_readonly_DEPENDENCIES) 
+	@rm -f Gia64-test-readonly$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(Gia64_test_readonly_OBJECTS) $(Gia64_test_readonly_LDADD) $(LIBS)
+
+Gia64-test-stack$(EXEEXT): $(Gia64_test_stack_OBJECTS) $(Gia64_test_stack_DEPENDENCIES) $(EXTRA_Gia64_test_stack_DEPENDENCIES) 
+	@rm -f Gia64-test-stack$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(Gia64_test_stack_OBJECTS) $(Gia64_test_stack_LDADD) $(LIBS)
+
+Gperf-simple$(EXEEXT): $(Gperf_simple_OBJECTS) $(Gperf_simple_DEPENDENCIES) $(EXTRA_Gperf_simple_DEPENDENCIES) 
+	@rm -f Gperf-simple$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(Gperf_simple_OBJECTS) $(Gperf_simple_LDADD) $(LIBS)
+
+Gperf-trace$(EXEEXT): $(Gperf_trace_OBJECTS) $(Gperf_trace_DEPENDENCIES) $(EXTRA_Gperf_trace_DEPENDENCIES) 
+	@rm -f Gperf-trace$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(Gperf_trace_OBJECTS) $(Gperf_trace_LDADD) $(LIBS)
+
+Gtest-bt$(EXEEXT): $(Gtest_bt_OBJECTS) $(Gtest_bt_DEPENDENCIES) $(EXTRA_Gtest_bt_DEPENDENCIES) 
+	@rm -f Gtest-bt$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(Gtest_bt_OBJECTS) $(Gtest_bt_LDADD) $(LIBS)
+
+Gtest-concurrent$(EXEEXT): $(Gtest_concurrent_OBJECTS) $(Gtest_concurrent_DEPENDENCIES) $(EXTRA_Gtest_concurrent_DEPENDENCIES) 
+	@rm -f Gtest-concurrent$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(Gtest_concurrent_OBJECTS) $(Gtest_concurrent_LDADD) $(LIBS)
+
+Gtest-dyn1$(EXEEXT): $(Gtest_dyn1_OBJECTS) $(Gtest_dyn1_DEPENDENCIES) $(EXTRA_Gtest_dyn1_DEPENDENCIES) 
+	@rm -f Gtest-dyn1$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(Gtest_dyn1_OBJECTS) $(Gtest_dyn1_LDADD) $(LIBS)
+
+Gtest-exc$(EXEEXT): $(Gtest_exc_OBJECTS) $(Gtest_exc_DEPENDENCIES) $(EXTRA_Gtest_exc_DEPENDENCIES) 
+	@rm -f Gtest-exc$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(Gtest_exc_OBJECTS) $(Gtest_exc_LDADD) $(LIBS)
+
+Gtest-init$(EXEEXT): $(Gtest_init_OBJECTS) $(Gtest_init_DEPENDENCIES) $(EXTRA_Gtest_init_DEPENDENCIES) 
+	@rm -f Gtest-init$(EXEEXT)
+	$(AM_V_CXXLD)$(CXXLINK) $(Gtest_init_OBJECTS) $(Gtest_init_LDADD) $(LIBS)
+
+Gtest-resume-sig$(EXEEXT): $(Gtest_resume_sig_OBJECTS) $(Gtest_resume_sig_DEPENDENCIES) $(EXTRA_Gtest_resume_sig_DEPENDENCIES) 
+	@rm -f Gtest-resume-sig$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(Gtest_resume_sig_OBJECTS) $(Gtest_resume_sig_LDADD) $(LIBS)
+
+Gtest-resume-sig-rt$(EXEEXT): $(Gtest_resume_sig_rt_OBJECTS) $(Gtest_resume_sig_rt_DEPENDENCIES) $(EXTRA_Gtest_resume_sig_rt_DEPENDENCIES) 
+	@rm -f Gtest-resume-sig-rt$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(Gtest_resume_sig_rt_OBJECTS) $(Gtest_resume_sig_rt_LDADD) $(LIBS)
+
+Gtest-trace$(EXEEXT): $(Gtest_trace_OBJECTS) $(Gtest_trace_DEPENDENCIES) $(EXTRA_Gtest_trace_DEPENDENCIES) 
+	@rm -f Gtest-trace$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(Gtest_trace_OBJECTS) $(Gtest_trace_LDADD) $(LIBS)
+
+Gx64-test-dwarf-expressions$(EXEEXT): $(Gx64_test_dwarf_expressions_OBJECTS) $(Gx64_test_dwarf_expressions_DEPENDENCIES) $(EXTRA_Gx64_test_dwarf_expressions_DEPENDENCIES) 
+	@rm -f Gx64-test-dwarf-expressions$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(Gx64_test_dwarf_expressions_OBJECTS) $(Gx64_test_dwarf_expressions_LDADD) $(LIBS)
+
+Lia64-test-nat$(EXEEXT): $(Lia64_test_nat_OBJECTS) $(Lia64_test_nat_DEPENDENCIES) $(EXTRA_Lia64_test_nat_DEPENDENCIES) 
+	@rm -f Lia64-test-nat$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(Lia64_test_nat_OBJECTS) $(Lia64_test_nat_LDADD) $(LIBS)
+
+Lia64-test-rbs$(EXEEXT): $(Lia64_test_rbs_OBJECTS) $(Lia64_test_rbs_DEPENDENCIES) $(EXTRA_Lia64_test_rbs_DEPENDENCIES) 
+	@rm -f Lia64-test-rbs$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(Lia64_test_rbs_OBJECTS) $(Lia64_test_rbs_LDADD) $(LIBS)
+
+Lia64-test-readonly$(EXEEXT): $(Lia64_test_readonly_OBJECTS) $(Lia64_test_readonly_DEPENDENCIES) $(EXTRA_Lia64_test_readonly_DEPENDENCIES) 
+	@rm -f Lia64-test-readonly$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(Lia64_test_readonly_OBJECTS) $(Lia64_test_readonly_LDADD) $(LIBS)
+
+Lia64-test-stack$(EXEEXT): $(Lia64_test_stack_OBJECTS) $(Lia64_test_stack_DEPENDENCIES) $(EXTRA_Lia64_test_stack_DEPENDENCIES) 
+	@rm -f Lia64-test-stack$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(Lia64_test_stack_OBJECTS) $(Lia64_test_stack_LDADD) $(LIBS)
+
+Lperf-simple$(EXEEXT): $(Lperf_simple_OBJECTS) $(Lperf_simple_DEPENDENCIES) $(EXTRA_Lperf_simple_DEPENDENCIES) 
+	@rm -f Lperf-simple$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(Lperf_simple_OBJECTS) $(Lperf_simple_LDADD) $(LIBS)
+
+Lperf-trace$(EXEEXT): $(Lperf_trace_OBJECTS) $(Lperf_trace_DEPENDENCIES) $(EXTRA_Lperf_trace_DEPENDENCIES) 
+	@rm -f Lperf-trace$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(Lperf_trace_OBJECTS) $(Lperf_trace_LDADD) $(LIBS)
+
+Lrs-race$(EXEEXT): $(Lrs_race_OBJECTS) $(Lrs_race_DEPENDENCIES) $(EXTRA_Lrs_race_DEPENDENCIES) 
+	@rm -f Lrs-race$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(Lrs_race_OBJECTS) $(Lrs_race_LDADD) $(LIBS)
+
+Ltest-bt$(EXEEXT): $(Ltest_bt_OBJECTS) $(Ltest_bt_DEPENDENCIES) $(EXTRA_Ltest_bt_DEPENDENCIES) 
+	@rm -f Ltest-bt$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(Ltest_bt_OBJECTS) $(Ltest_bt_LDADD) $(LIBS)
+
+Ltest-concurrent$(EXEEXT): $(Ltest_concurrent_OBJECTS) $(Ltest_concurrent_DEPENDENCIES) $(EXTRA_Ltest_concurrent_DEPENDENCIES) 
+	@rm -f Ltest-concurrent$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(Ltest_concurrent_OBJECTS) $(Ltest_concurrent_LDADD) $(LIBS)
+
+Ltest-cxx-exceptions$(EXEEXT): $(Ltest_cxx_exceptions_OBJECTS) $(Ltest_cxx_exceptions_DEPENDENCIES) $(EXTRA_Ltest_cxx_exceptions_DEPENDENCIES) 
+	@rm -f Ltest-cxx-exceptions$(EXEEXT)
+	$(AM_V_CXXLD)$(CXXLINK) $(Ltest_cxx_exceptions_OBJECTS) $(Ltest_cxx_exceptions_LDADD) $(LIBS)
+
+Ltest-dyn1$(EXEEXT): $(Ltest_dyn1_OBJECTS) $(Ltest_dyn1_DEPENDENCIES) $(EXTRA_Ltest_dyn1_DEPENDENCIES) 
+	@rm -f Ltest-dyn1$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(Ltest_dyn1_OBJECTS) $(Ltest_dyn1_LDADD) $(LIBS)
+
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+@am__fastdepCXX_FALSE@	$(AM_V_CXX@am__nodep@)$(CXXCOMPILE) -c -o $@ `$(CYGPATH_W) '$<'`
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+.cxx.lo:
+@am__fastdepCXX_TRUE@	$(AM_V_CXX)depbase=`echo $@ | sed 's|[^/]*$$|$(DEPDIR)/&|;s|\.lo$$||'`;\
+@am__fastdepCXX_TRUE@	$(LTCXXCOMPILE) -MT $@ -MD -MP -MF $$depbase.Tpo -c -o $@ $< &&\
+@am__fastdepCXX_TRUE@	$(am__mv) $$depbase.Tpo $$depbase.Plo
+@AMDEP_TRUE@@am__fastdepCXX_FALSE@	$(AM_V_CXX)source='$<' object='$@' libtool=yes @AMDEPBACKSLASH@
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+@am__fastdepCXX_FALSE@	$(AM_V_CXX@am__nodep@)$(LTCXXCOMPILE) -c -o $@ $<
+
+mostlyclean-libtool:
+	-rm -f *.lo
+
+clean-libtool:
+	-rm -rf .libs _libs
+
+ID: $(am__tagged_files)
+	$(am__define_uniq_tagged_files); mkid -fID $$unique
+tags: tags-am
+TAGS: tags
+
+tags-am: $(TAGS_DEPENDENCIES) $(am__tagged_files)
+	set x; \
+	here=`pwd`; \
+	$(am__define_uniq_tagged_files); \
+	shift; \
+	if test -z "$(ETAGS_ARGS)$$*$$unique"; then :; else \
+	  test -n "$$unique" || unique=$$empty_fix; \
+	  if test $$# -gt 0; then \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      "$$@" $$unique; \
+	  else \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      $$unique; \
+	  fi; \
+	fi
+ctags: ctags-am
+
+CTAGS: ctags
+ctags-am: $(TAGS_DEPENDENCIES) $(am__tagged_files)
+	$(am__define_uniq_tagged_files); \
+	test -z "$(CTAGS_ARGS)$$unique" \
+	  || $(CTAGS) $(CTAGSFLAGS) $(AM_CTAGSFLAGS) $(CTAGS_ARGS) \
+	     $$unique
+
+GTAGS:
+	here=`$(am__cd) $(top_builddir) && pwd` \
+	  && $(am__cd) $(top_srcdir) \
+	  && gtags -i $(GTAGS_ARGS) "$$here"
+cscopelist: cscopelist-am
+
+cscopelist-am: $(am__tagged_files)
+	list='$(am__tagged_files)'; \
+	case "$(srcdir)" in \
+	  [\\/]* | ?:[\\/]*) sdir="$(srcdir)" ;; \
+	  *) sdir=$(subdir)/$(srcdir) ;; \
+	esac; \
+	for i in $$list; do \
+	  if test -f "$$i"; then \
+	    echo "$(subdir)/$$i"; \
+	  else \
+	    echo "$$sdir/$$i"; \
+	  fi; \
+	done >> $(top_builddir)/cscope.files
+
+distclean-tags:
+	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
+
+# Recover from deleted '.trs' file; this should ensure that
+# "rm -f foo.log; make foo.trs" re-run 'foo.test', and re-create
+# both 'foo.log' and 'foo.trs'.  Break the recipe in two subshells
+# to avoid problems with "make -n".
+.log.trs:
+	rm -f $< $@
+	$(MAKE) $(AM_MAKEFLAGS) $<
+
+# Leading 'am--fnord' is there to ensure the list of targets does not
+# expand to empty, as could happen e.g. with make check TESTS=''.
+am--fnord $(TEST_LOGS) $(TEST_LOGS:.log=.trs): $(am__force_recheck)
+am--force-recheck:
+	@:
+
+$(TEST_SUITE_LOG): $(TEST_LOGS)
+	@$(am__set_TESTS_bases); \
+	am__f_ok () { test -f "$$1" && test -r "$$1"; }; \
+	redo_bases=`for i in $$bases; do \
+	              am__f_ok $$i.trs && am__f_ok $$i.log || echo $$i; \
+	            done`; \
+	if test -n "$$redo_bases"; then \
+	  redo_logs=`for i in $$redo_bases; do echo $$i.log; done`; \
+	  redo_results=`for i in $$redo_bases; do echo $$i.trs; done`; \
+	  if $(am__make_dryrun); then :; else \
+	    rm -f $$redo_logs && rm -f $$redo_results || exit 1; \
+	  fi; \
+	fi; \
+	if test -n "$$am__remaking_logs"; then \
+	  echo "fatal: making $(TEST_SUITE_LOG): possible infinite" \
+	       "recursion detected" >&2; \
+	elif test -n "$$redo_logs"; then \
+	  am__remaking_logs=yes $(MAKE) $(AM_MAKEFLAGS) $$redo_logs; \
+	fi; \
+	if $(am__make_dryrun); then :; else \
+	  st=0;  \
+	  errmsg="fatal: making $(TEST_SUITE_LOG): failed to create"; \
+	  for i in $$redo_bases; do \
+	    test -f $$i.trs && test -r $$i.trs \
+	      || { echo "$$errmsg $$i.trs" >&2; st=1; }; \
+	    test -f $$i.log && test -r $$i.log \
+	      || { echo "$$errmsg $$i.log" >&2; st=1; }; \
+	  done; \
+	  test $$st -eq 0 || exit 1; \
+	fi
+	@$(am__sh_e_setup); $(am__tty_colors); $(am__set_TESTS_bases); \
+	ws='[ 	]'; \
+	results=`for b in $$bases; do echo $$b.trs; done`; \
+	test -n "$$results" || results=/dev/null; \
+	all=`  grep "^$$ws*:test-result:"           $$results | wc -l`; \
+	pass=` grep "^$$ws*:test-result:$$ws*PASS"  $$results | wc -l`; \
+	fail=` grep "^$$ws*:test-result:$$ws*FAIL"  $$results | wc -l`; \
+	skip=` grep "^$$ws*:test-result:$$ws*SKIP"  $$results | wc -l`; \
+	xfail=`grep "^$$ws*:test-result:$$ws*XFAIL" $$results | wc -l`; \
+	xpass=`grep "^$$ws*:test-result:$$ws*XPASS" $$results | wc -l`; \
+	error=`grep "^$$ws*:test-result:$$ws*ERROR" $$results | wc -l`; \
+	if test `expr $$fail + $$xpass + $$error` -eq 0; then \
+	  success=true; \
+	else \
+	  success=false; \
+	fi; \
+	br='==================='; br=$$br$$br$$br$$br; \
+	result_count () \
+	{ \
+	    if test x"$$1" = x"--maybe-color"; then \
+	      maybe_colorize=yes; \
+	    elif test x"$$1" = x"--no-color"; then \
+	      maybe_colorize=no; \
+	    else \
+	      echo "$@: invalid 'result_count' usage" >&2; exit 4; \
+	    fi; \
+	    shift; \
+	    desc=$$1 count=$$2; \
+	    if test $$maybe_colorize = yes && test $$count -gt 0; then \
+	      color_start=$$3 color_end=$$std; \
+	    else \
+	      color_start= color_end=; \
+	    fi; \
+	    echo "$${color_start}# $$desc $$count$${color_end}"; \
+	}; \
+	create_testsuite_report () \
+	{ \
+	  result_count $$1 "TOTAL:" $$all   "$$brg"; \
+	  result_count $$1 "PASS: " $$pass  "$$grn"; \
+	  result_count $$1 "SKIP: " $$skip  "$$blu"; \
+	  result_count $$1 "XFAIL:" $$xfail "$$lgn"; \
+	  result_count $$1 "FAIL: " $$fail  "$$red"; \
+	  result_count $$1 "XPASS:" $$xpass "$$red"; \
+	  result_count $$1 "ERROR:" $$error "$$mgn"; \
+	}; \
+	{								\
+	  echo "$(PACKAGE_STRING): $(subdir)/$(TEST_SUITE_LOG)" |	\
+	    $(am__rst_title);						\
+	  create_testsuite_report --no-color;				\
+	  echo;								\
+	  echo ".. contents:: :depth: 2";				\
+	  echo;								\
+	  for b in $$bases; do echo $$b; done				\
+	    | $(am__create_global_log);					\
+	} >$(TEST_SUITE_LOG).tmp || exit 1;				\
+	mv $(TEST_SUITE_LOG).tmp $(TEST_SUITE_LOG);			\
+	if $$success; then						\
+	  col="$$grn";							\
+	 else								\
+	  col="$$red";							\
+	  test x"$$VERBOSE" = x || cat $(TEST_SUITE_LOG);		\
+	fi;								\
+	echo "$${col}$$br$${std}"; 					\
+	echo "$${col}Testsuite summary for $(PACKAGE_STRING)$${std}";	\
+	echo "$${col}$$br$${std}"; 					\
+	create_testsuite_report --maybe-color;				\
+	echo "$$col$$br$$std";						\
+	if $$success; then :; else					\
+	  echo "$${col}See $(subdir)/$(TEST_SUITE_LOG)$${std}";		\
+	  if test -n "$(PACKAGE_BUGREPORT)"; then			\
+	    echo "$${col}Please report to $(PACKAGE_BUGREPORT)$${std}";	\
+	  fi;								\
+	  echo "$$col$$br$$std";					\
+	fi;								\
+	$$success || exit 1
+
+check-TESTS:
+	@list='$(RECHECK_LOGS)';           test -z "$$list" || rm -f $$list
+	@list='$(RECHECK_LOGS:.log=.trs)'; test -z "$$list" || rm -f $$list
+	@test -z "$(TEST_SUITE_LOG)" || rm -f $(TEST_SUITE_LOG)
+	@set +e; $(am__set_TESTS_bases); \
+	log_list=`for i in $$bases; do echo $$i.log; done`; \
+	trs_list=`for i in $$bases; do echo $$i.trs; done`; \
+	log_list=`echo $$log_list`; trs_list=`echo $$trs_list`; \
+	$(MAKE) $(AM_MAKEFLAGS) $(TEST_SUITE_LOG) TEST_LOGS="$$log_list"; \
+	exit $$?;
+recheck: all $(check_PROGRAMS) $(check_SCRIPTS)
+	@test -z "$(TEST_SUITE_LOG)" || rm -f $(TEST_SUITE_LOG)
+	@set +e; $(am__set_TESTS_bases); \
+	bases=`for i in $$bases; do echo $$i; done \
+	         | $(am__list_recheck_tests)` || exit 1; \
+	log_list=`for i in $$bases; do echo $$i.log; done`; \
+	log_list=`echo $$log_list`; \
+	$(MAKE) $(AM_MAKEFLAGS) $(TEST_SUITE_LOG) \
+	        am__force_recheck=am--force-recheck \
+	        TEST_LOGS="$$log_list"; \
+	exit $$?
+test-proc-info.log: test-proc-info$(EXEEXT)
+	@p='test-proc-info$(EXEEXT)'; \
+	b='test-proc-info'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-static-link.log: test-static-link$(EXEEXT)
+	@p='test-static-link$(EXEEXT)'; \
+	b='test-static-link'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-strerror.log: test-strerror$(EXEEXT)
+	@p='test-strerror$(EXEEXT)'; \
+	b='test-strerror'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Gtest-bt.log: Gtest-bt$(EXEEXT)
+	@p='Gtest-bt$(EXEEXT)'; \
+	b='Gtest-bt'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Ltest-bt.log: Ltest-bt$(EXEEXT)
+	@p='Ltest-bt$(EXEEXT)'; \
+	b='Ltest-bt'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Gtest-exc.log: Gtest-exc$(EXEEXT)
+	@p='Gtest-exc$(EXEEXT)'; \
+	b='Gtest-exc'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Ltest-exc.log: Ltest-exc$(EXEEXT)
+	@p='Ltest-exc$(EXEEXT)'; \
+	b='Ltest-exc'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Gtest-init.log: Gtest-init$(EXEEXT)
+	@p='Gtest-init$(EXEEXT)'; \
+	b='Gtest-init'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Ltest-init.log: Ltest-init$(EXEEXT)
+	@p='Ltest-init$(EXEEXT)'; \
+	b='Ltest-init'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Gtest-concurrent.log: Gtest-concurrent$(EXEEXT)
+	@p='Gtest-concurrent$(EXEEXT)'; \
+	b='Gtest-concurrent'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Ltest-concurrent.log: Ltest-concurrent$(EXEEXT)
+	@p='Ltest-concurrent$(EXEEXT)'; \
+	b='Ltest-concurrent'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Gtest-resume-sig.log: Gtest-resume-sig$(EXEEXT)
+	@p='Gtest-resume-sig$(EXEEXT)'; \
+	b='Gtest-resume-sig'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Ltest-resume-sig.log: Ltest-resume-sig$(EXEEXT)
+	@p='Ltest-resume-sig$(EXEEXT)'; \
+	b='Ltest-resume-sig'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Gtest-resume-sig-rt.log: Gtest-resume-sig-rt$(EXEEXT)
+	@p='Gtest-resume-sig-rt$(EXEEXT)'; \
+	b='Gtest-resume-sig-rt'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Ltest-resume-sig-rt.log: Ltest-resume-sig-rt$(EXEEXT)
+	@p='Ltest-resume-sig-rt$(EXEEXT)'; \
+	b='Ltest-resume-sig-rt'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Gtest-trace.log: Gtest-trace$(EXEEXT)
+	@p='Gtest-trace$(EXEEXT)'; \
+	b='Gtest-trace'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Ltest-trace.log: Ltest-trace$(EXEEXT)
+	@p='Ltest-trace$(EXEEXT)'; \
+	b='Ltest-trace'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Ltest-init-local-signal.log: Ltest-init-local-signal$(EXEEXT)
+	@p='Ltest-init-local-signal$(EXEEXT)'; \
+	b='Ltest-init-local-signal'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Ltest-mem-validate.log: Ltest-mem-validate$(EXEEXT)
+	@p='Ltest-mem-validate$(EXEEXT)'; \
+	b='Ltest-mem-validate'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-async-sig.log: test-async-sig$(EXEEXT)
+	@p='test-async-sig$(EXEEXT)'; \
+	b='test-async-sig'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-flush-cache.log: test-flush-cache$(EXEEXT)
+	@p='test-flush-cache$(EXEEXT)'; \
+	b='test-flush-cache'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-init-remote.log: test-init-remote$(EXEEXT)
+	@p='test-init-remote$(EXEEXT)'; \
+	b='test-init-remote'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-mem.log: test-mem$(EXEEXT)
+	@p='test-mem$(EXEEXT)'; \
+	b='test-mem'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-reg-state.log: test-reg-state$(EXEEXT)
+	@p='test-reg-state$(EXEEXT)'; \
+	b='test-reg-state'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Ltest-varargs.log: Ltest-varargs$(EXEEXT)
+	@p='Ltest-varargs$(EXEEXT)'; \
+	b='Ltest-varargs'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Ltest-nomalloc.log: Ltest-nomalloc$(EXEEXT)
+	@p='Ltest-nomalloc$(EXEEXT)'; \
+	b='Ltest-nomalloc'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Ltest-nocalloc.log: Ltest-nocalloc$(EXEEXT)
+	@p='Ltest-nocalloc$(EXEEXT)'; \
+	b='Ltest-nocalloc'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Lrs-race.log: Lrs-race$(EXEEXT)
+	@p='Lrs-race$(EXEEXT)'; \
+	b='Lrs-race'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-ptrace.log: test-ptrace$(EXEEXT)
+	@p='test-ptrace$(EXEEXT)'; \
+	b='test-ptrace'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-setjmp.log: test-setjmp$(EXEEXT)
+	@p='test-setjmp$(EXEEXT)'; \
+	b='test-setjmp'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Ltest-cxx-exceptions.log: Ltest-cxx-exceptions$(EXEEXT)
+	@p='Ltest-cxx-exceptions$(EXEEXT)'; \
+	b='Ltest-cxx-exceptions'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Gtest-dyn1.log: Gtest-dyn1$(EXEEXT)
+	@p='Gtest-dyn1$(EXEEXT)'; \
+	b='Gtest-dyn1'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Ltest-dyn1.log: Ltest-dyn1$(EXEEXT)
+	@p='Ltest-dyn1$(EXEEXT)'; \
+	b='Ltest-dyn1'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Gia64-test-stack.log: Gia64-test-stack$(EXEEXT)
+	@p='Gia64-test-stack$(EXEEXT)'; \
+	b='Gia64-test-stack'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Lia64-test-stack.log: Lia64-test-stack$(EXEEXT)
+	@p='Lia64-test-stack$(EXEEXT)'; \
+	b='Lia64-test-stack'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Gia64-test-nat.log: Gia64-test-nat$(EXEEXT)
+	@p='Gia64-test-nat$(EXEEXT)'; \
+	b='Gia64-test-nat'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Lia64-test-nat.log: Lia64-test-nat$(EXEEXT)
+	@p='Lia64-test-nat$(EXEEXT)'; \
+	b='Lia64-test-nat'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Gia64-test-rbs.log: Gia64-test-rbs$(EXEEXT)
+	@p='Gia64-test-rbs$(EXEEXT)'; \
+	b='Gia64-test-rbs'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Lia64-test-rbs.log: Lia64-test-rbs$(EXEEXT)
+	@p='Lia64-test-rbs$(EXEEXT)'; \
+	b='Lia64-test-rbs'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Gia64-test-readonly.log: Gia64-test-readonly$(EXEEXT)
+	@p='Gia64-test-readonly$(EXEEXT)'; \
+	b='Gia64-test-readonly'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Lia64-test-readonly.log: Lia64-test-readonly$(EXEEXT)
+	@p='Lia64-test-readonly$(EXEEXT)'; \
+	b='Lia64-test-readonly'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+ia64-test-setjmp.log: ia64-test-setjmp$(EXEEXT)
+	@p='ia64-test-setjmp$(EXEEXT)'; \
+	b='ia64-test-setjmp'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+ia64-test-sig.log: ia64-test-sig$(EXEEXT)
+	@p='ia64-test-sig$(EXEEXT)'; \
+	b='ia64-test-sig'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Gx64-test-dwarf-expressions.log: Gx64-test-dwarf-expressions$(EXEEXT)
+	@p='Gx64-test-dwarf-expressions$(EXEEXT)'; \
+	b='Gx64-test-dwarf-expressions'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+Lx64-test-dwarf-expressions.log: Lx64-test-dwarf-expressions$(EXEEXT)
+	@p='Lx64-test-dwarf-expressions$(EXEEXT)'; \
+	b='Lx64-test-dwarf-expressions'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+run-check-namespace.log: run-check-namespace
+	@p='run-check-namespace'; \
+	b='run-check-namespace'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+run-ptrace-mapper.log: run-ptrace-mapper
+	@p='run-ptrace-mapper'; \
+	b='run-ptrace-mapper'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+run-ptrace-misc.log: run-ptrace-misc
+	@p='run-ptrace-misc'; \
+	b='run-ptrace-misc'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+run-coredump-unwind.log: run-coredump-unwind
+	@p='run-coredump-unwind'; \
+	b='run-coredump-unwind'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+run-coredump-unwind-mdi.log: run-coredump-unwind-mdi
+	@p='run-coredump-unwind-mdi'; \
+	b='run-coredump-unwind-mdi'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+run-ia64-test-dyn1.log: run-ia64-test-dyn1
+	@p='run-ia64-test-dyn1'; \
+	b='run-ia64-test-dyn1'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+.test.log:
+	@p='$<'; \
+	$(am__set_b); \
+	$(am__check_pre) $(TEST_LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_TEST_LOG_DRIVER_FLAGS) $(TEST_LOG_DRIVER_FLAGS) -- $(TEST_LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+@am__EXEEXT_TRUE@.test$(EXEEXT).log:
+@am__EXEEXT_TRUE@	@p='$<'; \
+@am__EXEEXT_TRUE@	$(am__set_b); \
+@am__EXEEXT_TRUE@	$(am__check_pre) $(TEST_LOG_DRIVER) --test-name "$$f" \
+@am__EXEEXT_TRUE@	--log-file $$b.log --trs-file $$b.trs \
+@am__EXEEXT_TRUE@	$(am__common_driver_flags) $(AM_TEST_LOG_DRIVER_FLAGS) $(TEST_LOG_DRIVER_FLAGS) -- $(TEST_LOG_COMPILE) \
+@am__EXEEXT_TRUE@	"$$tst" $(AM_TESTS_FD_REDIRECT)
+
+distdir: $(DISTFILES)
+	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
+	  sed -e "s|^$$srcdirstrip/||;t" \
+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+	$(MAKE) $(AM_MAKEFLAGS) $(check_PROGRAMS) $(check_SCRIPTS)
+	$(MAKE) $(AM_MAKEFLAGS) check-TESTS
+check: check-am
+all-am: Makefile $(PROGRAMS)
+installdirs:
+install: install-am
+install-exec: install-exec-am
+install-data: install-data-am
+uninstall: uninstall-am
+
+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-am
+install-strip:
+	if test -z '$(STRIP)'; then \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+	-test -z "$(TEST_LOGS)" || rm -f $(TEST_LOGS)
+	-test -z "$(TEST_LOGS:.log=.trs)" || rm -f $(TEST_LOGS:.log=.trs)
+	-test -z "$(TEST_SUITE_LOG)" || rm -f $(TEST_SUITE_LOG)
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+	-test -z "$(MAINTAINERCLEANFILES)" || rm -f $(MAINTAINERCLEANFILES)
+clean: clean-am
+
+clean-am: clean-checkPROGRAMS clean-generic clean-libtool \
+	clean-noinstPROGRAMS mostlyclean-am
+
+distclean: distclean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
+
+info: info-am
+
+info-am:
+
+install-data-am:
+
+install-dvi: install-dvi-am
+
+install-dvi-am:
+
+install-exec-am:
+
+install-html: install-html-am
+
+install-html-am:
+
+install-info: install-info-am
+
+install-info-am:
+
+install-man:
+
+install-pdf: install-pdf-am
+
+install-pdf-am:
+
+install-ps: install-ps-am
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+uninstall-am:
+
+.MAKE: check-am install-am install-strip
+
+.PHONY: CTAGS GTAGS TAGS all all-am check check-TESTS check-am clean \
+	clean-checkPROGRAMS clean-generic clean-libtool \
+	clean-noinstPROGRAMS cscopelist-am ctags ctags-am distclean \
+	distclean-compile distclean-generic distclean-libtool \
+	distclean-tags distdir dvi dvi-am html html-am info info-am \
+	install install-am install-data install-data-am install-dvi \
+	install-dvi-am install-exec install-exec-am install-html \
+	install-html-am install-info install-info-am install-man \
+	install-pdf install-pdf-am install-ps install-ps-am \
+	install-strip installcheck installcheck-am installdirs \
+	maintainer-clean maintainer-clean-generic mostlyclean \
+	mostlyclean-compile mostlyclean-generic mostlyclean-libtool \
+	pdf pdf-am ps ps-am recheck tags tags-am uninstall \
+	uninstall-am
+
+.PRECIOUS: Makefile
+
+
+@REMOTE_ONLY_TRUE@perf:
+
+@REMOTE_ONLY_FALSE@perf: perf-startup Gperf-simple Lperf-simple Lperf-trace
+@REMOTE_ONLY_FALSE@	@echo "########## Basic performance of generic libunwind:"
+@REMOTE_ONLY_FALSE@	@./Gperf-simple
+@REMOTE_ONLY_FALSE@	@echo "########## Basic performance of local-only libunwind:"
+@REMOTE_ONLY_FALSE@	@./Lperf-simple
+@REMOTE_ONLY_FALSE@	@echo "########## Performance of fast unwind:"
+@REMOTE_ONLY_FALSE@	@./Lperf-trace
+@REMOTE_ONLY_FALSE@	@echo "########## Startup overhead:"
+@REMOTE_ONLY_FALSE@	@$(srcdir)/perf-startup @arch@
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/third_party/unwind/dist/tests/check-namespace.sh.in b/src/third_party/unwind/dist/tests/check-namespace.sh.in
new file mode 100644
index 00000000000..5ed94fd2a26
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/check-namespace.sh.in
@@ -0,0 +1,382 @@
+#!/bin/sh
+verbose=false
+if [ "$1" = "-v" ]; then
+    verbose=true
+    shift
+fi
+
+build_plat=@build_arch@
+plat=@arch@
+os=@target_os@
+num_errors=0
+
+LIBUNWIND=../src/.libs/libunwind.so
+LIBUNWIND_GENERIC=../src/.libs/libunwind-${plat}.so
+
+fetch_symtab () {
+    filename=$1
+
+    if [ ! -r $filename ]; then
+	return
+    fi
+
+    if $verbose; then
+	echo "Checking $filename..."
+    fi
+
+    #
+    # Unfortunately, "nm --defined" is a GNU-extension.  For portability,
+    # build the list of defined symbols by hand.
+    #
+    symtab=`nm -g $filename`
+    saved_IFS="$IFS"
+    IFS=""
+    undef=`nm -g -u $filename`
+    for line in $undef; do
+	symtab=`echo "$symtab" | grep -v "^${line}"\$`
+    done;
+    IFS="$saved_IFS"
+}
+
+ignore () {
+    sym=$1
+    symtab=`echo "$symtab" | grep -v " ${sym}\$"`
+}
+
+match () {
+    sym=$1
+    if `echo "$symtab" | grep -q " ${sym}\$"`; then
+	symtab=`echo "$symtab" | grep -v " ${sym}\$"`
+    else
+	echo "  ERROR: Symbol \"$sym\" missing."
+	num_errors=`expr $num_errors + 1`
+    fi
+}
+
+#
+# Filter out miscellaneous symbols that get defined by the
+# linker for each shared object.
+#
+filter_misc () {
+    ignore _DYNAMIC
+    ignore _GLOBAL_OFFSET_TABLE_
+    ignore __bss_start
+    ignore _edata
+    ignore _end
+    ignore _Uelf32_get_proc_name
+    ignore _Uelf32_valid_object
+    ignore _Uelf64_get_proc_name
+    ignore _Uelf64_valid_object
+    ignore _U.*debug_level
+    ignore ICRT.INTERNAL	# ICC 8.x defines this
+
+    # Ignore symbols generated by the ARM Linux default linker script.
+    # For details see the binutils sources (src/ld/emulparams/armelf_linux.sh).
+    if [ ${plat} = "arm" ]; then
+	ignore __bss_start__
+	ignore __bss_end__
+	ignore __end__
+	ignore _bss_end__
+    fi
+
+    if [ ${plat} = "mips" ]; then
+	ignore _fbss
+	ignore _fdata
+	ignore _ftext
+	ignore _gp
+    fi
+}
+
+check_local_unw_abi () {
+    match _UL${plat}_apply_reg_state
+    match _UL${plat}_reg_states_iterate
+    match _UL${plat}_create_addr_space
+    match _UL${plat}_destroy_addr_space
+    match _UL${plat}_get_fpreg
+    match _UL${plat}_get_proc_info
+    match _UL${plat}_get_proc_info_by_ip
+    match _UL${plat}_get_proc_name
+    match _UL${plat}_get_reg
+    match _UL${plat}_get_save_loc
+    match _UL${plat}_init_local
+    match _UL${plat}_init_local2
+    match _UL${plat}_init_remote
+    match _UL${plat}_is_signal_frame
+    match _UL${plat}_local_addr_space
+    match _UL${plat}_resume
+    match _UL${plat}_set_caching_policy
+    match _UL${plat}_set_cache_size
+    match _UL${plat}_set_reg
+    match _UL${plat}_set_fpreg
+    match _UL${plat}_step
+
+    match _U${plat}_flush_cache
+    match _U${plat}_get_accessors
+    match _U${plat}_getcontext
+    match _U${plat}_regname
+    match _U${plat}_strerror
+
+    match _U_dyn_cancel
+    match _U_dyn_info_list_addr
+    match _U_dyn_register
+
+    match unw_backtrace
+    match backtrace
+
+    case ${plat} in
+	arm)
+	    match _U${plat}_get_elf_image
+	    match _U${plat}_get_exe_image_path
+	    match _U${plat}_is_fpreg
+	    match _UL${plat}_search_unwind_table
+	    match _UL${plat}_dwarf_search_unwind_table
+	    match _UL${plat}_dwarf_find_unwind_table
+	    ;;
+	hppa)
+	    match _UL${plat}_dwarf_search_unwind_table
+	    match _UL${plat}_dwarf_find_unwind_table
+	    match _U${plat}_get_elf_image
+	    match _U${plat}_get_exe_image_path
+	    match _U${plat}_setcontext
+	    ;;
+	ia64)
+	    match _UL${plat}_search_unwind_table
+	    match _U${plat}_get_elf_image
+	    match _U${plat}_get_exe_image_path
+	    ;;
+	x86)
+	    match _U${plat}_get_elf_image
+	    match _U${plat}_get_exe_image_path
+	    match _U${plat}_is_fpreg
+	    match _UL${plat}_dwarf_search_unwind_table
+	    match _UL${plat}_dwarf_find_unwind_table
+	    ;;
+	x86_64)
+	    match _U${plat}_get_elf_image
+	    match _U${plat}_get_exe_image_path
+	    match _U${plat}_is_fpreg
+	    match _UL${plat}_dwarf_search_unwind_table
+	    match _UL${plat}_dwarf_find_unwind_table
+	    match _U${plat}_setcontext
+	    ;;
+	ppc*)
+	    match _U${plat}_get_func_addr
+	    match _U${plat}_get_elf_image
+	    match _U${plat}_get_exe_image_path
+	    match _U${plat}_is_fpreg
+	    match _UL${plat}_dwarf_search_unwind_table
+	    match _UL${plat}_dwarf_find_unwind_table
+	    ;;
+        tilegx)
+            match _U${plat}_is_fpreg
+	    match _UL${plat}_dwarf_search_unwind_table
+	    match _UL${plat}_dwarf_find_unwind_table
+            match _UL${plat}_local_addr_space_init
+            match _U${plat}_get_elf_image
+	    match _U${plat}_get_exe_image_path
+            match ${plat}_lock
+            ;;
+	s390x)
+	    match _U${plat}_get_elf_image
+	    match _U${plat}_get_exe_image_path
+	    match _U${plat}_is_fpreg
+	    match _UL${plat}_dwarf_search_unwind_table
+	    match _UL${plat}_dwarf_find_unwind_table
+	    match _U${plat}_setcontext
+	    ;;
+
+	*)
+	    match _U${plat}_is_fpreg
+	    match _UL${plat}_dwarf_search_unwind_table
+	    match _UL${plat}_dwarf_find_unwind_table
+	    ;;
+    esac
+
+    if [ x@enable_debug_frame@ = xyes ]; then
+	match _UL${plat}_dwarf_find_debug_frame
+    fi
+
+}
+
+check_generic_unw_abi () {
+    match _U${plat}_apply_reg_state
+    match _U${plat}_reg_states_iterate
+    match _U${plat}_create_addr_space
+    match _U${plat}_destroy_addr_space
+    match _U${plat}_flush_cache
+    match _U${plat}_get_accessors
+    match _U${plat}_get_fpreg
+    match _U${plat}_get_proc_info
+    match _U${plat}_get_proc_info_by_ip
+    match _U${plat}_get_proc_name
+    match _U${plat}_get_reg
+    match _U${plat}_get_save_loc
+    match _U${plat}_init_local
+    match _U${plat}_init_local2
+    match _U${plat}_init_remote
+    match _U${plat}_is_signal_frame
+    match _U${plat}_local_addr_space
+    match _U${plat}_regname
+    match _U${plat}_resume
+    match _U${plat}_set_caching_policy
+    match _U${plat}_set_cache_size
+    match _U${plat}_set_fpreg
+    match _U${plat}_set_reg
+    match _U${plat}_step
+    match _U${plat}_strerror
+
+    case ${plat} in
+	arm)
+	    match _U${plat}_is_fpreg
+	    match _U${plat}_get_elf_image
+	    match _U${plat}_get_exe_image_path
+	    match _U${plat}_search_unwind_table
+	    match _U${plat}_dwarf_search_unwind_table
+	    match _U${plat}_dwarf_find_unwind_table
+	    ;;
+	hppa)
+	    match _U${plat}_dwarf_search_unwind_table
+	    match _U${plat}_dwarf_find_unwind_table
+	    match _U${plat}_get_elf_image
+	    match _U${plat}_get_exe_image_path
+	    ;;
+	ia64)
+	    match _U${plat}_search_unwind_table
+	    match _U${plat}_find_dyn_list
+	    if [ $plat = $build_plat ]; then
+		match _U${plat}_get_elf_image
+		match _U${plat}_get_exe_image_path
+		case $os in
+		    linux*)
+			match _U${plat}_get_kernel_table
+			;;
+		esac
+	    fi
+	    ;;
+	x86)
+	    match _U${plat}_get_elf_image
+	    match _U${plat}_get_exe_image_path
+	    match _U${plat}_is_fpreg
+	    match _U${plat}_dwarf_search_unwind_table
+	    match _U${plat}_dwarf_find_unwind_table
+	    ;;
+	x86_64)
+	    match _U${plat}_get_elf_image
+	    match _U${plat}_get_exe_image_path
+	    match _U${plat}_is_fpreg
+	    match _U${plat}_dwarf_search_unwind_table
+	    match _U${plat}_dwarf_find_unwind_table
+	    ;;
+	ppc*)
+	    match _U${plat}_get_elf_image
+	    match _U${plat}_get_exe_image_path
+	    match _U${plat}_get_func_addr
+	    match _U${plat}_is_fpreg
+	    match _U${plat}_dwarf_search_unwind_table
+	    match _U${plat}_dwarf_find_unwind_table
+	    ;;
+        tilegx)
+            match _U${plat}_dwarf_search_unwind_table
+	    match _U${plat}_dwarf_find_unwind_table
+            match _U${plat}_get_elf_image
+	    match _U${plat}_get_exe_image_path
+            match _U${plat}_is_fpreg
+            match _U${plat}_local_addr_space_init
+            match ${plat}_lock
+            ;;
+	s390x)
+	    match _U${plat}_is_fpreg
+	    match _U${plat}_get_elf_image
+	    match _U${plat}_get_exe_image_path
+	    match _U${plat}_dwarf_search_unwind_table
+	    match _U${plat}_dwarf_find_unwind_table
+	    ;;
+	*)
+	    match _U${plat}_is_fpreg
+	    match _U${plat}_dwarf_search_unwind_table
+	    match _U${plat}_dwarf_find_unwind_table
+	    ;;
+    esac
+
+    if [ x@enable_debug_frame@ = xyes ]; then
+	match _U${plat}_dwarf_find_debug_frame
+    fi
+}
+
+check_cxx_abi () {
+    match _Unwind_Backtrace
+    match _Unwind_DeleteException
+    match _Unwind_FindEnclosingFunction
+    match _Unwind_ForcedUnwind
+    match _Unwind_GetBSP
+    match _Unwind_GetCFA
+    match _Unwind_GetDataRelBase
+    match _Unwind_GetGR
+    match _Unwind_GetIP
+    match _Unwind_GetIPInfo
+    match _Unwind_GetLanguageSpecificData
+    match _Unwind_GetRegionStart
+    match _Unwind_GetTextRelBase
+    match _Unwind_RaiseException
+    match _Unwind_Resume
+    match _Unwind_Resume_or_Rethrow
+    match _Unwind_SetGR
+    match _Unwind_SetIP
+    match __libunwind_Unwind_Backtrace
+    match __libunwind_Unwind_DeleteException
+    match __libunwind_Unwind_FindEnclosingFunction
+    match __libunwind_Unwind_ForcedUnwind
+    match __libunwind_Unwind_GetBSP
+    match __libunwind_Unwind_GetCFA
+    match __libunwind_Unwind_GetDataRelBase
+    match __libunwind_Unwind_GetGR
+    match __libunwind_Unwind_GetIP
+    match __libunwind_Unwind_GetIPInfo
+    match __libunwind_Unwind_GetLanguageSpecificData
+    match __libunwind_Unwind_GetRegionStart
+    match __libunwind_Unwind_GetTextRelBase
+    match __libunwind_Unwind_RaiseException
+    match __libunwind_Unwind_Resume
+    match __libunwind_Unwind_Resume_or_Rethrow
+    match __libunwind_Unwind_SetGR
+    match __libunwind_Unwind_SetIP
+    case $os in
+	linux*)
+	    # needed only for Intel 8.0 bug-compatibility
+	    match _ReadSLEB
+	    match _ReadULEB
+	    ;;
+    esac
+}
+
+check_empty () {
+    if [ -n "$symtab" ]; then
+	printf "  ERROR: Extraneous symbols:\n$symtab\n"
+	num_errors=`expr $num_errors + 1`
+    fi
+}
+
+if [ $plat = $build_plat ]; then
+    fetch_symtab $LIBUNWIND
+    filter_misc
+    check_local_unw_abi
+    if [ x@enable_cxx_exceptions@ = xyes ]; then
+      check_cxx_abi
+    fi
+    check_empty
+fi
+
+fetch_symtab $LIBUNWIND_GENERIC
+filter_misc
+check_generic_unw_abi
+check_empty
+
+if [ $num_errors -gt 0 ]; then
+    echo "FAILURE: Detected $num_errors errors"
+    exit 1
+fi
+
+if $verbose; then
+    echo "  SUCCESS: all checks passed"
+fi
+exit 0
diff --git a/src/third_party/unwind/dist/tests/crasher.c b/src/third_party/unwind/dist/tests/crasher.c
new file mode 100644
index 00000000000..9df57095d85
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/crasher.c
@@ -0,0 +1,129 @@
+/* This program should crash and produce coredump */
+
+#include "compiler.h"
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <unistd.h>
+#ifdef __FreeBSD__
+#include <sys/types.h>
+#include <sys/sysctl.h>
+#include <sys/user.h>
+#endif
+
+#if defined(__linux__)
+void write_maps(char *fname)
+{
+    char buf[512], path[128];
+    char exec;
+    uintmax_t addr;
+    FILE *maps = fopen("/proc/self/maps", "r");
+    FILE *out = fopen(fname, "w");
+
+    if (!maps || !out)
+        exit(EXIT_FAILURE);
+
+    while (fgets(buf, sizeof(buf), maps))
+    {
+        if (sscanf(buf, "%jx-%*x %*c%*c%c%*c %*x %*s %*d /%126[^\n]", &addr, &exec, path+1) != 3)
+            continue;
+
+        if (exec != 'x')
+            continue;
+
+        path[0] = '/';
+        fprintf(out, "0x%jx:%s ", addr, path);
+    }
+    fprintf(out, "\n");
+
+    fclose(out);
+    fclose(maps);
+}
+#elif defined(__FreeBSD__)
+void
+write_maps(char *fname)
+{
+    FILE *out;
+    char *buf, *bp, *eb;
+    struct kinfo_vmentry *kv;
+    int mib[4], error;
+    size_t len;
+
+    out = fopen(fname, "w");
+    if (out == NULL)
+        exit(EXIT_FAILURE);
+
+    len = 0;
+    mib[0] = CTL_KERN;
+    mib[1] = KERN_PROC;
+    mib[2] = KERN_PROC_VMMAP;
+    mib[3] = getpid();
+    error = sysctl(mib, 4, NULL, &len, NULL, 0);
+    if (error == -1)
+	exit(EXIT_FAILURE);
+    len = len * 4 / 3;
+    buf = malloc(len);
+    if (buf == NULL)
+	exit(EXIT_FAILURE);
+    error = sysctl(mib, 4, buf, &len, NULL, 0);
+    if (error == -1)
+	    exit(EXIT_FAILURE);
+
+    for (bp = buf, eb = buf + len; bp < eb; bp += kv->kve_structsize) {
+        kv = (struct kinfo_vmentry *)(uintptr_t)bp;
+	if (kv->kve_type == KVME_TYPE_VNODE &&
+	  (kv->kve_protection & KVME_PROT_EXEC) != 0) {
+	    fprintf(out, "0x%jx:%s ", kv->kve_start, kv->kve_path);
+	}
+    }
+
+    fprintf(out, "\n");
+    fclose(out);
+    free(buf);
+}
+#else
+#error Port me
+#endif
+
+#ifdef __GNUC__
+#ifndef __clang__
+// Gcc >= 8 became too good at inlining aliase c into b when using -O2 or -O3,
+// so force -O1 in all cases, otherwise a frame will be missing in the tests.
+#pragma GCC optimize "-O1"
+#endif
+int c(int x) NOINLINE ALIAS(b);
+#define compiler_barrier() asm volatile("");
+#else
+int c(int x);
+#define compiler_barrier()
+#endif
+
+int NOINLINE a(void)
+{
+  *(volatile int *)32 = 1;
+  return 1;
+}
+
+int NOINLINE b(int x)
+{
+  int r;
+
+  compiler_barrier();
+  
+  if (x)
+    r = a();
+  else
+    r = c(1);
+  return r + 1;
+}
+
+int
+main (int argc, char **argv)
+{
+  if (argc > 1)
+      write_maps(argv[1]);
+  b(0);
+  return 0;
+}
+
diff --git a/src/third_party/unwind/dist/tests/flush-cache.S b/src/third_party/unwind/dist/tests/flush-cache.S
new file mode 100644
index 00000000000..3ee47269e18
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/flush-cache.S
@@ -0,0 +1,104 @@
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#ifndef HAVE__BUILTIN___CLEAR_CACHE
+
+#if defined(__ia64__)
+
+	.global flush_cache
+
+	.proc flush_cache
+flush_cache:
+	.prologue
+        alloc r2=ar.pfs,2,0,0,0
+	add r8=31,in1			// round up to 32 byte-boundary
+        ;;
+        shr.u r8=r8,5                   // we flush 32 bytes per iteration
+	;;
+	add r8=-1,r8
+        .save ar.lc, r3
+        mov r3=ar.lc                    // save ar.lc
+        ;;
+        .body
+
+        mov ar.lc=r8
+        ;;
+.loop:  fc in0                          // issuable on M0 only
+        add in0=32,in0
+        br.cloop.sptk.few .loop
+        ;;
+        sync.i
+        ;;
+        srlz.i
+        ;;
+        mov ar.lc=r3                    // restore ar.lc
+        br.ret.sptk.many rp
+	.endp flush_cache
+
+#elif defined(__i386__) || defined (__x86_64__)
+
+	.globl flush_cache
+flush_cache:
+	ret
+
+#elif defined(__hppa__)
+
+# warning FIX ME!!
+
+        .globl flush_cache
+flush_cache:
+        .proc
+        .callinfo
+        bv      %r0(%rp)
+        .procend
+#elif defined(__powerpc64__)
+# warning IMPLEMENT ME FOR PPC64!!
+	.globl flush_cache
+flush_cache:
+	lwz    11,  0(1)  ;
+	lwz     0,  4(11) ;
+	mtlr    0         ;
+	lwz    31, -4(11) ;
+	mr      1, 11     ;
+	blr
+#elif defined(__powerpc__)
+# warning IMPLEMENT ME FOR PPC32!!
+	.globl flush_cache
+flush_cache:
+	lwz    11,  0(1)  ;
+	lwz     0,  4(11) ;
+	mtlr    0         ;
+	lwz    31, -4(11) ;
+	mr      1, 11     ;
+	blr
+#elif defined(__arm__)
+	.text
+	.globl flush_cache
+flush_cache:
+	bx    lr
+#elif defined(__tilegx__)
+        .text
+        .globl flush_cache
+flush_cache:
+
+        andi r0, r0, -64
+1:      {
+         flush r0 ;
+         addi  r0, r0, 64
+        }
+        {
+         bgtz r1, 1b ;
+         addi r1, r1, -64
+        }
+        jrp   lr
+#else
+# error Need flush_cache code for this architecture.
+#endif
+
+#if defined ( __linux__) && !defined (__arm__)
+        /* We do not need executable stack.  */
+        .section        .note.GNU-stack,"",@progbits
+#endif
+
+#endif
diff --git a/src/third_party/unwind/dist/tests/flush-cache.h b/src/third_party/unwind/dist/tests/flush-cache.h
new file mode 100644
index 00000000000..8227d85b3f4
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/flush-cache.h
@@ -0,0 +1,38 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef FLUSH_CACHE_H
+#define FLUSH_CACHE_H
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#ifdef HAVE__BUILTIN___CLEAR_CACHE
+#define flush_cache(ADDR, LEN) \
+  __builtin___clear_cache((ADDR), (ADDR) + (LEN))
+#else
+#include <stddef.h>
+extern void flush_cache (void *addr, size_t len);
+#endif
+
+#endif /* FLUSH_CACHE_H */
diff --git a/src/third_party/unwind/dist/tests/forker.c b/src/third_party/unwind/dist/tests/forker.c
new file mode 100644
index 00000000000..b03f86a7f03
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/forker.c
@@ -0,0 +1,76 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+int
+main (int argc, char **argv, char **envp)
+{
+  char *program, **child_argv;
+  struct timeval start, stop;
+  double secs;
+  int status, i;
+  long count;
+  pid_t pid;
+
+  count = atol (argv[1]);
+  program = argv[2];
+
+  child_argv = alloca ((argc - 1) * sizeof (char *));
+  for (i = 0; i < argc - 2; ++i)
+    child_argv[i] = argv[2 + i];
+  child_argv[i] = NULL;
+
+  gettimeofday (&start, NULL);
+  for (i = 0; i < count; ++i)
+    {
+      pid = fork ();
+      if (pid == 0)
+        {
+          execve (program, child_argv, envp);
+          _exit (-1);
+        }
+      else
+        {
+          waitpid (pid, &status, 0);
+          if (!WIFEXITED (status) || WEXITSTATUS (status) != 0)
+            {
+              fprintf (stderr, "%s: child failed\n", argv[0]);
+              exit (-1);
+            }
+        }
+    }
+  gettimeofday (&stop, NULL);
+
+  secs = ((stop.tv_sec + 1e-6 * stop.tv_usec)
+	  - (start.tv_sec + 1e-6 * start.tv_usec));
+  printf ("%lu nsec/execution\n",
+	  (unsigned long) (1e9 * secs / (double) count));
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/tests/ia64-dyn-asm.S b/src/third_party/unwind/dist/tests/ia64-dyn-asm.S
new file mode 100644
index 00000000000..79582e9e1bb
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/ia64-dyn-asm.S
@@ -0,0 +1,102 @@
+	.globl func_add1, func_add1_end
+	.proc func_add1
+func_add1:
+{.mib;	add r8 = 1, r32
+	nop.i 0
+	br.ret.sptk.many rp
+}
+func_add1_end:
+	.endp func_add1
+
+	.globl func_add3, func_add3_end
+	.proc func_add3
+func_add3:
+{.mmi;	alloc loc0 = ar.pfs, 2, 1, 2, 0
+	mov r2 = sp
+	add sp = -16, sp
+}	;;
+{.mii;	ld8 r8 = [in1], 8		// load the function pointer
+	mov r3 = rp
+	mov rp = loc0			// trash rp
+}	;;
+{.mmi;	ld8 r9 = [r8], 8		// load the entry-point
+	st8 [r2] = r3
+	mov out0 = in0
+}	;;
+{.mii;	ld8 gp = [r8]			// load the gp
+	mov b6 = r9
+	mov out1 = in1
+}
+{.mib;	nop 0
+	nop 0
+	br.call.sptk rp = b6
+}
+{.mmi;	add r2 = 16, sp
+	;;
+	ld8 r3 = [r2]			// r3 = saved rp
+	mov ar.pfs = loc0
+}	;;
+{.mii;	nop 0
+	mov rp = r3
+	adds sp = 16, sp
+}	;;
+{.mib;	st8 [sp] = in0			// trash rp save location
+	add r8 = 2, r8
+	br.ret.sptk.many rp
+}
+func_add3_end:
+	.endp func_add3
+
+	.globl func_vframe, func_vframe_end
+	.proc func_vframe
+func_vframe:
+{.mii;	alloc r16 = ar.pfs, 1, 2, 0, 0	// 0
+	mov loc0 = rp
+	mov loc1 = sp
+}	;;
+{.mmi;	sub sp = sp, in0
+	st8 [loc1] = r16
+	mov r2 = -99			// 0
+}	;;
+{.mii;	nop 0
+	mov rp = r2
+	mov ar.pfs = r0
+}
+{.mib;	mov r16 = r2
+	tbit.nz p6, p0 = in0, 4
+(p6)	br.cond.sptk.many .exit
+}	;;
+{.mmi;	ld8 r16 = [loc1]
+	;;
+	mov r3 = loc0			// 8 move saved rp to r3
+	mov ar.pfs = r16
+}	;;
+{.mmi;	mov sp = loc1			// 10
+	st8 [loc1] = r0			// trash saved pfs
+	mov loc0 = r2
+}	;;
+{.mib;	mov r8 = 10
+	mov rp = r3
+	br.ret.sptk.many rp
+}
+.exit:
+{.mmi;	ld8 r16 = [loc1]
+	;;
+	sub sp = 32, sp
+	mov ar.pfs = r16
+}	;;
+{.mmi;	mov sp = loc1
+	st8 [loc1] = r0			// trash saved pfs
+	mov rp = loc0
+}
+{.mib;	nop 0
+	mov r8 = 4
+	br.ret.sptk.many rp
+}
+func_vframe_end:
+	.endp func_vframe
+
+#ifdef __linux__
+        /* We do not need executable stack.  */
+        .section        .note.GNU-stack,"",@progbits
+#endif
diff --git a/src/third_party/unwind/dist/tests/ia64-test-dyn1.c b/src/third_party/unwind/dist/tests/ia64-test-dyn1.c
new file mode 100644
index 00000000000..90127dd5b95
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/ia64-test-dyn1.c
@@ -0,0 +1,223 @@
+#include "flush-cache.h"
+
+#include <assert.h>
+#include <libunwind.h>
+#include <unistd.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <sys/mman.h>
+
+int verbose;
+
+#ifdef __ia64__
+# define GET_ENTRY(fdesc)	(((uintptr_t *) (fdesc))[0])
+# define GET_GP(fdesc)		(((uintptr_t *) (fdesc))[0])
+# define EXTRA			16
+#else
+# define GET_ENTRY(fdesc)	((uintptr_t ) (fdesc))
+# define GET_GP(fdesc)		(0)
+# define EXTRA			0
+#endif
+
+int
+make_executable (void *addr, size_t len)
+{
+  if (mprotect ((void *) (((long) addr) & -getpagesize ()), len,
+		PROT_READ | PROT_WRITE | PROT_EXEC) < 0)
+    {
+      perror ("mprotect");
+      return -1;
+    }
+  flush_cache (addr, len);
+  return 0;
+}
+
+void *
+create_func (unw_dyn_info_t *di, const char *name, long (*func) (),
+	     void *end, unw_dyn_region_info_t *region)
+{
+  void *mem, *memend, *addr, *fptr;
+  unw_word_t gp = 0;
+  size_t len;
+
+  len = (uintptr_t) end - GET_ENTRY (func) + EXTRA;
+  mem = malloc (len);
+  if (verbose)
+    printf ("%s: cloning %s at %p (%zu bytes)\n",
+	    __FUNCTION__, name, mem, len);
+  memend = (char *) mem + len;
+
+#ifdef __ia64__
+  addr = (void *) GET_ENTRY (func);
+
+  /* build function descriptor: */
+  ((long *) mem)[0] = (long) mem + 16;		/* entry point */
+  ((long *) mem)[1] = GET_GP (func);		/* global-pointer */
+  fptr = mem;
+  mem = (void *) ((long) mem + 16);
+#else
+  fptr = mem;
+#endif
+
+  len = (char *) memend - (char *) mem;
+  memcpy (mem, addr, len);
+
+  if (make_executable (mem, len) < 0)
+    return NULL;
+
+  if (di)
+    {
+      memset (di, 0, sizeof (*di));
+      di->start_ip = (unw_word_t) mem;
+      di->end_ip = (unw_word_t) memend;
+      di->gp = gp;
+      di->format = UNW_INFO_FORMAT_DYNAMIC;
+      di->u.pi.name_ptr = (unw_word_t) name;
+      di->u.pi.regions = region;
+    }
+  return fptr;
+}
+
+int
+main (int argc, char **argv)
+{
+  extern long func_add1 (long);
+  extern char func_add1_end[];
+  extern long func_add3 (long, long (*[])());
+  extern char func_add3_end[];
+  extern long func_vframe (long);
+  extern char func_vframe_end[];
+  unw_dyn_region_info_t *r_pro, *r_epi, *r, *rtmp;
+  unw_dyn_info_t di0, di1, di2, di3;
+  long (*add1) (long);
+  long (*add3_0) (long);
+  long (*add3_1) (long, void *[]);
+  long (*vframe) (long);
+  void *flist[2];
+  long ret;
+  int i;
+
+  signal (SIGUSR1, SIG_IGN);
+  signal (SIGUSR2, SIG_IGN);
+
+  if (argc != 1)
+    verbose = 1;
+
+  add1 = (long (*)(long))
+	  create_func (&di0, "func_add1", func_add1, func_add1_end, NULL);
+
+  /* Describe the epilogue of func_add3: */
+  i = 0;
+  r_epi = alloca (_U_dyn_region_info_size (5));
+  r_epi->op_count = 5;
+  r_epi->next = NULL;
+  r_epi->insn_count = -9;
+  _U_dyn_op_pop_frames (&r_epi->op[i++],
+			_U_QP_TRUE, /* when=*/ 5, /* num_frames=*/ 1);
+  _U_dyn_op_stop (&r_epi->op[i++]);
+  assert ((unsigned) i <= r_epi->op_count);
+
+  /* Describe the prologue of func_add3: */
+  i = 0;
+  r_pro = alloca (_U_dyn_region_info_size (4));
+  r_pro->op_count = 4;
+  r_pro->next = r_epi;
+  r_pro->insn_count = 8;
+  _U_dyn_op_save_reg (&r_pro->op[i++], _U_QP_TRUE, /* when=*/ 0,
+		      /* reg=*/ UNW_IA64_AR_PFS, /* dst=*/ UNW_IA64_GR + 34);
+  _U_dyn_op_add (&r_pro->op[i++], _U_QP_TRUE, /* when=*/ 2,
+		 /* reg= */ UNW_IA64_SP, /* val=*/ -16);
+  _U_dyn_op_save_reg (&r_pro->op[i++], _U_QP_TRUE, /* when=*/ 4,
+		      /* reg=*/ UNW_IA64_RP, /* dst=*/ UNW_IA64_GR + 3);
+  _U_dyn_op_spill_sp_rel (&r_pro->op[i++], _U_QP_TRUE, /* when=*/ 7,
+		      /* reg=*/ UNW_IA64_RP, /* off=*/ 16);
+  assert ((unsigned) i <= r_pro->op_count);
+
+  /* Create regions for func_vframe: */
+  i = 0;
+  r = alloca (_U_dyn_region_info_size (16));
+  r->op_count = 16;
+  r->next = NULL;
+  r->insn_count = 4;
+  _U_dyn_op_label_state (&r->op[i++], /* label=*/ 100402);
+  _U_dyn_op_pop_frames (&r->op[i++], _U_QP_TRUE, /* when=*/ 3, /* frames=*/ 1);
+  _U_dyn_op_stop (&r->op[i++]);
+  assert ((unsigned) i <= r->op_count);
+
+  i = 0;
+  rtmp = r;
+  r = alloca (_U_dyn_region_info_size (16));
+  r->op_count = 16;
+  r->next = rtmp;
+  r->insn_count = 16;
+  _U_dyn_op_save_reg (&r->op[i++], _U_QP_TRUE, /* when=*/ 8,
+		      /* reg=*/ UNW_IA64_RP, /* dst=*/ UNW_IA64_GR + 3);
+  _U_dyn_op_pop_frames (&r->op[i++], _U_QP_TRUE, /* when=*/ 10,
+			/* num_frames=*/ 1);
+  _U_dyn_op_stop (&r->op[i++]);
+  assert ((unsigned) i <= r->op_count);
+
+  i = 0;
+  rtmp = r;
+  r = alloca (_U_dyn_region_info_size (16));
+  r->op_count = 16;
+  r->next = rtmp;
+  r->insn_count = 5;
+  _U_dyn_op_save_reg (&r->op[i++], _U_QP_TRUE, /* when=*/ 1,
+			  /* reg=*/ UNW_IA64_RP, /* dst=*/ UNW_IA64_GR + 33);
+  _U_dyn_op_save_reg (&r->op[i++], _U_QP_TRUE, /* when=*/ 2,
+			  /* reg=*/ UNW_IA64_SP, /* dst=*/ UNW_IA64_GR + 34);
+  _U_dyn_op_spill_fp_rel (&r->op[i++], _U_QP_TRUE, /* when=*/ 4,
+			  /* reg=*/ UNW_IA64_AR_PFS, /* off=*/ 16);
+  _U_dyn_op_label_state (&r->op[i++], /* label=*/ 100402);
+  _U_dyn_op_stop (&r->op[i++]);
+  assert ((unsigned) i <= r->op_count);
+
+  /* Create two functions which can share the region-list:  */
+  add3_0 = (long (*) (long))
+	  create_func (&di1, "func_add3/0", func_add3, func_add3_end, r_pro);
+  add3_1 = (long (*) (long, void *[]))
+	  create_func (&di2, "func_add3/1", func_add3, func_add3_end, r_pro);
+  vframe = (long (*) (long))
+	  create_func (&di3, "func_vframe", func_vframe, func_vframe_end, r);
+
+  _U_dyn_register (&di1);
+  _U_dyn_register (&di2);
+  _U_dyn_register (&di3);
+  _U_dyn_register (&di0);
+
+  flist[0] = add3_0;
+  flist[1] = add1;
+
+  kill (getpid (), SIGUSR1);	/* do something ptmon can latch onto */
+  ret = (*add3_1) (13, flist);
+  if (ret != 18)
+    {
+      fprintf (stderr, "FAILURE: (*add3_1)(13) returned %ld\n", ret);
+      exit (-1);
+    }
+
+  ret = (*vframe) (48);
+  if (ret != 4)
+    {
+      fprintf (stderr, "FAILURE: (*vframe)(16) returned %ld\n", ret);
+      exit (-1);
+    }
+  ret = (*vframe) (64);
+  if (ret != 10)
+    {
+      fprintf (stderr, "FAILURE: (*vframe)(32) returned %ld\n", ret);
+      exit (-1);
+    }
+  kill (getpid (), SIGUSR2);	/* do something ptmon can latch onto */
+
+  _U_dyn_cancel (&di0);
+  _U_dyn_cancel (&di1);
+  _U_dyn_cancel (&di3);
+  _U_dyn_cancel (&di2);
+
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/tests/ia64-test-nat-asm.S b/src/third_party/unwind/dist/tests/ia64-test-nat-asm.S
new file mode 100644
index 00000000000..eea5ac27836
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/ia64-test-nat-asm.S
@@ -0,0 +1,508 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004-2005 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+	.text
+
+#define CALL_NEXT_PTR(gp_save_reg, arg0, arg1)				\
+	ld8 r2 = [arg0], 8;;	/* read the next function pointer */	\
+	ld8 r3 = [r2], 8;;	/* read the function's entry-point */	\
+	ld8 r2 = [r2];;		/* read the function's gp */		\
+	mov b6 = r3;							\
+	mov gp_save_reg = gp;						\
+	mov out0 = arg0;						\
+	mov out1 = arg1;						\
+	mov gp = r2;							\
+	br.call.sptk.many rp = b6;;					\
+	mov gp = gp_save_reg
+
+#define CALL_NEXT(gp_save_reg)	CALL_NEXT_PTR(gp_save_reg, in0, in1)
+
+#define LOAD_VAL(reg)				\
+	ld8 reg = [in1], 8;;			\
+	tbit.nz p15, p0 = reg, 0;;		\
+(p15)	ld8.s reg = [r0]
+
+
+	.global flushrs
+	.proc flushrs
+flushrs:
+	flushrs;;
+	br.ret.sptk.many rp
+	.endp flushrs
+
+	/* Save r4-r7 into stacked registers, load them up with the
+	   values passed via the pointer in in1 and then call the
+	   function passed via the pointer in in0.  */
+
+	.global save_static_to_stacked
+	.proc save_static_to_stacked
+save_static_to_stacked:
+	.prologue
+	.regstk 2, 7, 2, 0
+	.save ar.pfs, loc0
+	alloc loc0 = ar.pfs, 2, 7, 2, 0
+	.save rp, loc1
+	mov loc1 = rp
+	.spillreg r4, loc2
+	mov loc2 = r4
+	.spillreg r5, loc3
+	mov loc3 = r5
+	.spillreg r6, loc4
+	mov loc4 = r6
+	.spillreg r7, loc5
+	mov loc5 = r7
+	.body
+	LOAD_VAL(r4)
+	LOAD_VAL(r5)
+	LOAD_VAL(r6)
+	LOAD_VAL(r7)
+	CALL_NEXT(loc6)
+
+	mov r4 = loc2
+	mov r5 = loc3
+	mov r6 = loc4
+	mov r7 = loc5
+
+	mov ar.pfs = loc0
+	mov rp = loc1
+	br.ret.sptk.many rp
+	.endp save_static_to_stacked
+
+	/* Save f2 to the memory stack, save r4 to f2, then load
+	   r4 with the value passed via in1 and call the function
+	   passed via in0.  */
+
+	.global save_static_to_fr
+	.proc save_static_to_fr
+save_static_to_fr:
+	.prologue
+	.regstk 2, 3, 2, 0
+	.save ar.pfs, loc0
+	alloc loc0 = ar.pfs, 2, 3, 2, 0
+	.save rp, loc1
+	mov loc1 = rp
+	.fframe 16
+	.spillpsp f2, 0
+	stf.spill [sp] = f2, -16
+	.spillreg r4, f2
+	setf.sig f2 = r4
+
+	.body
+
+	ld8 r4 = [in1], 8;;
+	tbit.nz p6, p0 = r4, 0;;
+(p6)	ld8.s r4 = [r0]
+
+	CALL_NEXT(loc2)
+
+	getf.sig r4 = f2		// restore r4
+	.restore sp
+	add sp = 16, sp;;
+	ldf.fill f2 = [sp]		// restore r2
+
+	mov ar.pfs = loc0
+	mov rp = loc1
+	br.ret.sptk.many rp
+	.endp save_static_to_fr
+
+	/* If r4 is not a NaT, save b3 to a stacked register and
+	   then save r4 in b3.  The non-NaTness of r4 is saved in
+	   p1.  */
+
+	.global save_static_to_br
+	.proc save_static_to_br
+save_static_to_br:
+	.prologue
+	.regstk 2, 6, 2, 0
+	.save ar.pfs, loc0
+	alloc loc0 = ar.pfs, 2, 6, 2, 0
+	.save rp, loc1
+	mov loc1 = rp
+
+	.save pr, loc2
+	mov loc2 = pr			// save predicates
+
+	.spillreg b3, loc3
+	mov loc3 = b3
+
+	tnat.z p1, p2 = r4;;
+	.spillreg.p p1, r4, b3
+(p1)	mov b3 = r4
+	.spillreg.p p2, r4, loc4
+(p2)	mov loc4 = r4
+
+	.body
+
+	LOAD_VAL(r4)
+	CALL_NEXT(loc5)
+
+	.pred.rel.mutex p1, p2
+(p1)	mov r4 = b3			// restore r4
+(p2)	mov r4 = loc4
+
+	mov ar.pfs = loc0
+	mov rp = loc1
+	mov pr = loc2, -1
+	mov b3 = loc3			// restore b3
+	br.ret.sptk.many rp
+	.endp save_static_to_br
+
+	/* Spill r4 into memory and then save r5 in r4.  */
+
+	.global save_static_to_mem
+	.proc save_static_to_mem
+save_static_to_mem:
+	.prologue
+	.regstk 2, 4, 2, 0
+	.save ar.pfs, loc0
+	alloc loc0 = ar.pfs, 2, 4, 2, 0
+	.save rp, loc1
+	mov loc1 = rp
+	.save ar.unat, loc2
+	mov loc2 = ar.unat
+
+	.fframe 16
+	.spillpsp r4, 0
+	st8.spill [sp] = r4, -16
+
+	.spillreg r5, r4
+	mov r4 = r5
+
+	.body
+
+	LOAD_VAL(r5)
+	CALL_NEXT(loc3)
+
+	mov r5 = r4			// restore r5
+	.restore sp
+	add sp = 16, sp;;
+	ld8.fill r4 = [sp]		// restore r4
+
+	mov ar.pfs = loc0
+	mov rp = loc1
+	mov ar.unat = loc2		// restore ar.unat
+	br.ret.sptk.many rp
+	.endp save_static_to_mem
+
+	/* Spill r6 into memory and save primary ar.unat in a register.  */
+
+	.global save_static_to_mem2
+	.proc save_static_to_mem2
+save_static_to_mem2:
+	.prologue
+	.regstk 2, 5, 2, 0
+	.save ar.pfs, loc0
+	alloc loc0 = ar.pfs, 2, 5, 2, 0
+	.save rp, loc1
+	mov loc1 = rp
+	.save ar.unat, loc2
+	mov loc2 = ar.unat
+
+	.fframe 16
+	.spillpsp r6, 0
+	st8.spill [sp] = r6, -16;;
+	.save @priunat, loc3
+	mov loc3 = ar.unat
+	mov ar.unat = 0			// trash ar.unat
+
+	.body
+
+	LOAD_VAL(r6)
+	CALL_NEXT(loc4)
+
+	mov ar.unat = loc3		// restore primary UNaT
+	.restore sp
+	add sp = 16, sp;;
+	ld8.fill r6 = [sp]		// restore r6
+
+	mov ar.pfs = loc0
+	mov rp = loc1
+	mov ar.unat = loc2		// restore ar.unat
+	br.ret.sptk.many rp
+	.endp save_static_to_mem2
+
+	/* Spill r6 into memory and save primary ar.unat in memory.  */
+
+	.global save_static_to_mem3
+	.proc save_static_to_mem3
+save_static_to_mem3:
+	.prologue
+	.regstk 2, 5, 2, 0
+	.save ar.pfs, loc0
+	alloc loc0 = ar.pfs, 2, 5, 2, 0
+	.save rp, loc1
+	mov loc1 = rp
+	.save ar.unat, loc2
+	mov loc2 = ar.unat
+
+	add r2 = 8, sp
+	.fframe 16
+	.spillpsp r6, 0
+	st8.spill [sp] = r6, -16;;
+	mov r3 = ar.unat;;
+	.savepsp @priunat, -8
+	st8 [r2] = r3
+	mov ar.unat = 0			// trash ar.unat
+
+	.body
+
+	LOAD_VAL(r6)
+	CALL_NEXT(loc4)
+
+	add r2 = 24, sp;;
+	ld8 r3 = [r2];;
+	mov ar.unat = r3		// restore primary UNaT
+	.restore sp
+	add sp = 16, sp;;
+	ld8.fill r6 = [sp]		// restore r6
+
+	mov ar.pfs = loc0
+	mov rp = loc1
+	mov ar.unat = loc2		// restore ar.unat
+	br.ret.sptk.many rp
+	.endp save_static_to_mem3
+
+	/* Spill r6 into memory and save primary ar.unat in register,
+	   then in memory.  */
+
+	.global save_static_to_mem4
+	.proc save_static_to_mem4
+save_static_to_mem4:
+	.prologue
+	.regstk 2, 5, 2, 0
+	.save ar.pfs, loc0
+	alloc loc0 = ar.pfs, 2, 5, 2, 0
+	.save rp, loc1
+	mov loc1 = rp
+	.save ar.unat, loc2
+	mov loc2 = ar.unat
+
+	add r2 = 8, sp
+	.fframe 16
+	.spillpsp r6, 0
+	st8.spill [sp] = r6, -16;;
+	.save @priunat, r3
+	mov r3 = ar.unat;;
+	mov ar.unat = 0			// trash ar.unat
+	.savepsp @priunat, -8
+	st8 [r2] = r3
+	mov r3 = r0			// trash register pri UNaT location
+	.body
+
+	LOAD_VAL(r6)
+	CALL_NEXT(loc4)
+
+	add r2 = 24, sp;;
+	ld8 r3 = [r2];;
+	mov ar.unat = r3		// restore primary UNaT
+	.restore sp
+	add sp = 16, sp;;
+	ld8.fill r6 = [sp]		// restore r6
+
+	mov ar.pfs = loc0
+	mov rp = loc1
+	mov ar.unat = loc2		// restore ar.unat
+	br.ret.sptk.many rp
+	.endp save_static_to_mem4
+
+	/* Spill r6 into memory and save primary ar.unat in register,
+	   then in memory.  */
+
+	.global save_static_to_mem5
+	.proc save_static_to_mem5
+save_static_to_mem5:
+	.prologue
+	.regstk 2, 5, 2, 0
+	.save ar.pfs, loc0
+	alloc loc0 = ar.pfs, 2, 5, 2, 0
+	.save rp, loc1
+	mov loc1 = rp
+	.save ar.unat, loc2
+	mov loc2 = ar.unat
+
+	add r2 = 8, sp
+	.fframe 16
+	.spillpsp r6, 0
+	st8.spill [sp] = r6, -16;;
+	mov r3 = ar.unat;;
+	mov ar.unat = 0			// trash ar.unat
+	.savepsp @priunat, -8
+	st8 [r2] = r3
+	.save @priunat, loc3
+	mov loc3 = r3
+	st8 [r2] = r0			// trash memory pri UNaT location
+	.body
+
+	LOAD_VAL(r6)
+	CALL_NEXT(loc4)
+
+	add r2 = 24, sp;;
+	ld8 r3 = [r2];;
+	mov ar.unat = loc3		// restore primary UNaT
+	.restore sp
+	add sp = 16, sp;;
+	ld8.fill r6 = [sp]		// restore r6
+
+	mov ar.pfs = loc0
+	mov rp = loc1
+	mov ar.unat = loc2		// restore ar.unat
+	br.ret.sptk.many rp
+	.endp save_static_to_mem5
+
+	/* Save r4-r7 to various scratch registers, then trigger
+	   a segfault.  */
+
+	.global save_static_to_scratch
+	.proc save_static_to_scratch
+save_static_to_scratch:
+	.prologue
+
+	.spillreg r4, r16
+	mov r16 = r4			// save r4 in r16
+	tnat.nz p6, p7 = r5;;
+	.spillreg.p p6, r5, f31
+(p6)	setf.sig f31 = r5		// save r5 in f31 if it's a NaT
+	.spillreg.p p7, r5, b6
+(p7)	mov b6 = r5			//         in  b6 if it not
+	.spillreg r6, f32
+	setf.sig f32 = r6		// save r6 in f32 (fph partition)
+	.spillsp r7, 0
+	st8.spill [sp] = r7		// save r7 in the scratch stack space
+	.spillreg f4, f6
+	mov f6 = f4;;
+	.body
+
+	ld8 r2 = [in1]
+	;;
+	mov ar.ec = r2
+
+	LOAD_VAL(r4)
+	LOAD_VAL(r5)
+	LOAD_VAL(r6)
+	LOAD_VAL(r7)
+	setf.sig f4 = r4
+
+	/* Now force a SIGSEGV.  Make sure the ld8 is at the beginning of a
+	   bundle, so the signal-handler can skip over it simply by
+	   incrementing the IP.  */
+	{
+		.mmi
+		ld8 r2 = [r0]
+		nop.m 0
+		nop.i 0 ;;
+	}
+
+	mov f4 = f6
+	mov r4 = r16
+	.pred.rel.mutex p6, p7
+(p6)	getf.sig r5 = f31
+(p7)	mov r5 = b6
+	getf.sig r6 = f32
+	ld8.fill r7 = [sp]
+
+	br.ret.sptk.many rp
+	.endp save_static_to_scratch
+
+	/* Rotate registers a bit in a vain attempt to sow some confusion.
+	   Care must be taken not to write any rotating general register
+	   after rotation, because we keep the preserved state
+	   there... */
+
+	.global rotate_regs
+	.proc rotate_regs
+rotate_regs:
+	.prologue
+	.regstk 2, 14, 2, 16
+	.save ar.pfs, loc0
+	alloc loc0 = ar.pfs, 2, 14, 2, 16
+	.save rp, loc1
+	mov loc1 = rp
+	.save pr, loc2
+	mov loc2 = pr
+	.save ar.lc, loc3
+	mov loc3 = ar.lc
+	.spillreg r4, loc4
+	mov loc4 = r4
+
+	ld8 r2 = [in1], 8;;
+	mov pr = r2, -1
+
+	ld8 r2 = [in1], 8;;
+	mov r8 = in0
+	mov r9 = in1
+	and r2 = 127, r2;;
+	mov ar.ec = 0
+	mov ar.lc = r2;;
+
+	// use p6 to preserve p63 as it gets rotated into p16:
+(p16)	cmp.eq.unc p6,p0 = r0,r0;;
+1:
+(p6)	cmp.eq.unc p16,p0 = r0,r0
+(p63)	cmp.eq.unc p6,p0 = r0,r0
+	br.ctop.dptk.few 1b;;
+
+(p6)	cmp.eq.unc p63,p0 = r0,r0
+
+	CALL_NEXT_PTR(r4, r8, r9)
+
+	clrrrb
+
+	mov ar.pfs = loc0
+	mov rp = loc1
+	mov pr = loc2, -1
+	mov ar.lc = loc3
+	mov r4 = loc4
+	br.ret.sptk.many rp
+
+	.endp rotate_regs
+
+	.global save_pr
+	.proc save_pr
+save_pr:
+	.prologue
+	.regstk 2, 4, 2, 0
+	.save ar.pfs, loc0
+	alloc loc0 = ar.pfs, 2, 4, 2, 0
+	.save rp, loc1
+	mov loc1 = rp
+	.save pr, loc2
+	mov loc2 = pr
+
+	ld8 r2 = [in1], 8;;
+	mov pr = r2, -1
+
+	CALL_NEXT(loc3)
+
+	mov ar.pfs = loc0
+	mov rp = loc1
+	mov pr = loc2, -1
+	br.ret.sptk.many rp
+
+	.endp save_pr
+
+#ifdef __linux__
+        /* We do not need executable stack.  */
+        .section        .note.GNU-stack,"",@progbits
+#endif
diff --git a/src/third_party/unwind/dist/tests/ia64-test-rbs-asm.S b/src/third_party/unwind/dist/tests/ia64-test-rbs-asm.S
new file mode 100644
index 00000000000..9a6d33fb1de
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/ia64-test-rbs-asm.S
@@ -0,0 +1,275 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "ia64-test-rbs.h"
+
+	.common stackmem, NSTACKS*STACK_SIZE, 16
+
+	.text
+
+#define SAVED_SP_OFF		 0
+#define SAVED_RP_OFF		 8
+#define SAVED_PFS_OFF		16
+#define SAVED_RNAT_OFF		24
+#define SAVED_BSP_OFF		32
+#define SAVED_BSPSTORE_OFF	40
+#define FRAME_SIZE		48
+
+#define SPILL(n)							     \
+	/* int rbs_spill_#n(long iteration, int (*next_func[])()) */	     \
+	.globl rbs_spill_##n;						     \
+	.proc rbs_spill_##n;						     \
+rbs_spill_##n:								     \
+	.prologue;							     \
+	alloc r18 = ar.pfs, 2, (n)-2, 2, 0;/* read ar.pfs */		     \
+	/* first, calculate address of new stack: */			     \
+	addl r2 = @ltoff(stackmem), gp;					     \
+	add r8 = 1, in0;						     \
+	;;								     \
+	ld8 r2 = [r2];			/* r2 = &stackmem */		     \
+	shl r3 = in0, STACK_SIZE_SHIFT;					     \
+	shladd r8 = r8, 3, in1;		/* r8 = &next_func[iteration+1] */   \
+	;;								     \
+	ld8 r8 = [r8];			/* r8 = next_func[iteration+1] */    \
+	add r2 = r2, r3;		/* r2 = stackmem[iteration] */	     \
+	;;								     \
+	ld8 r9 = [r8], 8;;		/* r9 = target's entry-point */	     \
+	ld8 gp = [r8];			/* r22 = target's gp */		     \
+	addl r3 = STACK_SIZE-FRAME_SIZE, r2; /* r3 = &stackframe */	     \
+	;;								     \
+	mov b6 = r9;							     \
+	st8 [r3] = sp;							     \
+	.vframesp SAVED_SP_OFF+16;					     \
+	adds sp = -16, r3;		/* switch the memory stack */	     \
+	;;								     \
+	adds r3 = (SAVED_RP_OFF - SAVED_SP_OFF), r3;			     \
+	mov r16 = rp;							     \
+	;;								     \
+	.savesp rp, SAVED_RP_OFF+16;					     \
+	st8 [r3] = r16, (SAVED_PFS_OFF - SAVED_RP_OFF);			     \
+	;;								     \
+	.savesp ar.pfs, SAVED_PFS_OFF+16;				     \
+	st8 [r3] = r18, (SAVED_BSP_OFF - SAVED_PFS_OFF);		     \
+	mov r16 = ar.bsp;						     \
+	mov r17 = ar.bspstore;						     \
+	mov r18 = ar.rnat;						     \
+	;;								     \
+	.savesp ar.bsp, SAVED_BSP_OFF+16;				     \
+	st8 [r3] = r16, (SAVED_BSPSTORE_OFF - SAVED_BSP_OFF);		     \
+	;;								     \
+	.savesp ar.bspstore, SAVED_BSPSTORE_OFF+16;			     \
+	st8 [r3] = r17, (SAVED_RNAT_OFF - SAVED_BSPSTORE_OFF);		     \
+	mov out1 = in1;							     \
+	;;								     \
+	.savesp ar.rnat, SAVED_RNAT_OFF+16;				     \
+	st8 [r3] = r18;							     \
+	.body;								     \
+	mov ar.bspstore = r2;		/* switch the backing store */	     \
+	adds out0 = 1, in0;						     \
+	;;								     \
+	br.call.sptk.many rp = b6;					     \
+1:	/* switch back to stack: */					     \
+	adds r3 = SAVED_SP_OFF+16, sp;					     \
+	cmp.ge p8, p0 = r8, r0;						     \
+	;;								     \
+(p8)	add r8 = 1, r8;							     \
+	ld8 r16 = [r3], (SAVED_RP_OFF-SAVED_SP_OFF);;	/* saved sp */	     \
+	ld8 r17 = [r3], (SAVED_PFS_OFF-SAVED_RP_OFF);;	/* saved rp */	     \
+	ld8 r18 = [r3], (SAVED_RNAT_OFF-SAVED_PFS_OFF);;/* saved pfs */	     \
+	ld8 r19 = [r3], (SAVED_BSP_OFF-SAVED_RNAT_OFF);;/* saved rnat */     \
+	ld8 r20 = [r3], (SAVED_BSPSTORE_OFF-SAVED_BSP_OFF);;/* saved bsp */  \
+	ld8 r21 = [r3];;				/* saved bspstore */ \
+	mov rp = r17;							     \
+	mov ar.pfs = r18;						     \
+	shl r3 = in0, STACK_SIZE_SHIFT;					     \
+	addl r2 = @ltoff(stackmem), gp;;				     \
+	ld8 r2 = [r2];;			/* r2 = &stackmem */		     \
+	add r2 = r2, r3;		/* r2 = stackmem[iteration] */	     \
+	mov r3 = ar.bsp;;						     \
+	sub r2 = r3, r2;;		/* r2 = dirty_size */		     \
+	shl r2 = r2, 16;;						     \
+	mov ar.rsc = r2;;						     \
+	alloc r3 = ar.pfs, 0, 0, 0, 0;;					     \
+	loadrs;;							     \
+	mov ar.bspstore = r21;;	/* this also restores ar.bsp */		     \
+	mov ar.rnat = r19;						     \
+	.restore sp;							     \
+	mov sp = r16;							     \
+	br.ret.sptk.many rp;						     \
+	.endp rbs_spill_##n
+
+		        SPILL(2);  SPILL(3)
+  SPILL(4);  SPILL(5);  SPILL(6);  SPILL(7)
+  SPILL(8);  SPILL(9); SPILL(10); SPILL(11)
+ SPILL(12); SPILL(13); SPILL(14); SPILL(15)
+ SPILL(16); SPILL(17); SPILL(18); SPILL(19)
+ SPILL(20); SPILL(21); SPILL(22); SPILL(23)
+ SPILL(24); SPILL(25); SPILL(26); SPILL(27)
+ SPILL(28); SPILL(29); SPILL(30); SPILL(31)
+ SPILL(32); SPILL(33); SPILL(34); SPILL(35)
+ SPILL(36); SPILL(37); SPILL(38); SPILL(39)
+ SPILL(40); SPILL(41); SPILL(42); SPILL(43)
+ SPILL(44); SPILL(45); SPILL(46); SPILL(47)
+ SPILL(48); SPILL(49); SPILL(50); SPILL(51)
+ SPILL(52); SPILL(53); SPILL(54); SPILL(55)
+ SPILL(56); SPILL(57); SPILL(58); SPILL(59)
+ SPILL(60); SPILL(61); SPILL(62); SPILL(63)
+ SPILL(64); SPILL(65); SPILL(66); SPILL(67)
+ SPILL(68); SPILL(69); SPILL(70); SPILL(71)
+ SPILL(72); SPILL(73); SPILL(74); SPILL(75)
+ SPILL(76); SPILL(77); SPILL(78); SPILL(79)
+ SPILL(80); SPILL(81); SPILL(82); SPILL(83)
+ SPILL(84); SPILL(85); SPILL(86); SPILL(87)
+ SPILL(88); SPILL(89); SPILL(90); SPILL(91)
+ SPILL(92); SPILL(93); SPILL(94)
+
+#define LD_LOC(n)				\
+	ld4 loc##n = [in1], 4;;			\
+	cmp.eq p8, p9 = r0, loc##n;;		\
+(p9)	or loc##n = loc##n, r8;			\
+(p8)	ld4.s loc##n = [r0]
+
+#define CK_LOC(n)				\
+	ld4 r16 = [in1], 4;;			\
+	cmp.eq p8, p9 = r0, r16;		\
+	or r16 = r16, r9;;			\
+(p8)	tnat.z p10, p0 = loc##n;		\
+(p9)	cmp.ne p10, p0 = r16, loc##n;		\
+	;;					\
+(p10)	mov r8 = -n;				\
+(p10)	br.cond.spnt.many .fail
+
+	/* int loadup(long iteration, int *values, next_func[]) */
+
+	.global loadup
+	.proc loadup
+loadup:
+	.prologue
+	.save ar.pfs, r36
+	alloc loc1 = ar.pfs, 3, 90, 3, 0
+	.save rp, loc0
+	mov loc0 = rp
+	.body
+	cmp.eq p6, p7 = 1, in0
+	;;
+	mov ar.rsc = 0		// put RSE into enforced lazy mode
+(p6)	mov out1 = in2
+(p7)	mov out2 = in2
+
+(p6)	ld8 r17 = [in2]		// get address of function descriptor
+(p7)	add out0 = -1, in0
+(p7)	mov out1 = in1
+
+	;;
+(p6)	ld8 r16 = [r17], 8	// load entry point
+	shl r8 = in0, 32	// store iteration # in top 32 bits
+	mov r18 = in1
+	;;
+(p6)	ld8 r1 = [r17]		// load gp
+(p6)	mov b6 = r16
+
+(p6)	mov out0 = 0
+	;;
+	LD_LOC( 2); LD_LOC( 3)
+	LD_LOC( 4); LD_LOC( 5); LD_LOC( 6); LD_LOC( 7)
+	LD_LOC( 8); LD_LOC( 9); LD_LOC(10); LD_LOC(11)
+	LD_LOC(12); LD_LOC(13); LD_LOC(14); LD_LOC(15)
+	LD_LOC(16); LD_LOC(17); LD_LOC(18); LD_LOC(19)
+	LD_LOC(20); LD_LOC(21); LD_LOC(22); LD_LOC(23)
+	LD_LOC(24); LD_LOC(25); LD_LOC(26); LD_LOC(27)
+	LD_LOC(28); LD_LOC(29); LD_LOC(30); LD_LOC(31)
+	LD_LOC(32); LD_LOC(33); LD_LOC(34); LD_LOC(35)
+	LD_LOC(36); LD_LOC(37); LD_LOC(38); LD_LOC(39)
+	LD_LOC(40); LD_LOC(41); LD_LOC(42); LD_LOC(43)
+	LD_LOC(44); LD_LOC(45); LD_LOC(46); LD_LOC(47)
+	LD_LOC(48); LD_LOC(49); LD_LOC(50); LD_LOC(51)
+	LD_LOC(52); LD_LOC(53); LD_LOC(54); LD_LOC(55)
+	LD_LOC(56); LD_LOC(57); LD_LOC(58); LD_LOC(59)
+	LD_LOC(60); LD_LOC(61); LD_LOC(62); LD_LOC(63)
+	LD_LOC(64); LD_LOC(65); LD_LOC(66); LD_LOC(67)
+	LD_LOC(68); LD_LOC(69); LD_LOC(70); LD_LOC(71)
+	LD_LOC(72); LD_LOC(73); LD_LOC(74); LD_LOC(75)
+	LD_LOC(76); LD_LOC(77); LD_LOC(78); LD_LOC(79)
+	LD_LOC(80); LD_LOC(81); LD_LOC(82); LD_LOC(83)
+	LD_LOC(84); LD_LOC(85); LD_LOC(86); LD_LOC(87)
+	LD_LOC(88); LD_LOC(89)
+	;;
+{	.mbb
+	mov in1 = r18
+(p6)	br.call.sptk.many rp = b6
+(p7)	br.call.sptk.many rp = loadup
+}
+	cmp.lt p8, p9 = r8, r0
+	shl r9 = in0, 32	// store iteration # in top 32 bits
+(p8)	br.cond.spnt.few .fail
+	;;
+	add r8 = 1, r8
+	CK_LOC( 2); CK_LOC( 3)
+	CK_LOC( 4); CK_LOC( 5); CK_LOC( 6); CK_LOC( 7)
+	CK_LOC( 8); CK_LOC( 9); CK_LOC(10); CK_LOC(11)
+	CK_LOC(12); CK_LOC(13); CK_LOC(14); CK_LOC(15)
+	CK_LOC(16); CK_LOC(17); CK_LOC(18); CK_LOC(19)
+	CK_LOC(20); CK_LOC(21); CK_LOC(22); CK_LOC(23)
+	CK_LOC(24); CK_LOC(25); CK_LOC(26); CK_LOC(27)
+	CK_LOC(28); CK_LOC(29); CK_LOC(30); CK_LOC(31)
+	CK_LOC(32); CK_LOC(33); CK_LOC(34); CK_LOC(35)
+	CK_LOC(36); CK_LOC(37); CK_LOC(38); CK_LOC(39)
+	CK_LOC(40); CK_LOC(41); CK_LOC(42); CK_LOC(43)
+	CK_LOC(44); CK_LOC(45); CK_LOC(46); CK_LOC(47)
+	CK_LOC(48); CK_LOC(49); CK_LOC(50); CK_LOC(51)
+	CK_LOC(52); CK_LOC(53); CK_LOC(54); CK_LOC(55)
+	CK_LOC(56); CK_LOC(57); CK_LOC(58); CK_LOC(59)
+	CK_LOC(60); CK_LOC(61); CK_LOC(62); CK_LOC(63)
+	CK_LOC(64); CK_LOC(65); CK_LOC(66); CK_LOC(67)
+	CK_LOC(68); CK_LOC(69); CK_LOC(70); CK_LOC(71)
+	CK_LOC(72); CK_LOC(73); CK_LOC(74); CK_LOC(75)
+	CK_LOC(76); CK_LOC(77); CK_LOC(78); CK_LOC(79)
+	CK_LOC(80); CK_LOC(81); CK_LOC(82); CK_LOC(83)
+	CK_LOC(84); CK_LOC(85); CK_LOC(86); CK_LOC(87)
+	CK_LOC(88); CK_LOC(89)
+.fail:
+	mov rp = loc0
+	mov ar.pfs = loc1
+	br.ret.sptk.many rp
+	.endp loadup
+
+	.global resumption_point_label
+	.proc resumption_point
+resumption_point:
+resumption_point_label:
+	.prologue
+	.save rp, r16
+	.save ar.pfs, r0
+	.body
+	mov r8 = r15
+	mov b6 = r16
+	;;
+	br.cond.sptk.many b6
+	.endp resumption_point
+
+#ifdef __linux__
+        /* We do not need executable stack.  */
+        .section        .note.GNU-stack,"",@progbits
+#endif
diff --git a/src/third_party/unwind/dist/tests/ia64-test-rbs.h b/src/third_party/unwind/dist/tests/ia64-test-rbs.h
new file mode 100644
index 00000000000..3315ad63800
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/ia64-test-rbs.h
@@ -0,0 +1,3 @@
+#define NSTACKS			128
+#define STACK_SIZE_SHIFT	17
+#define STACK_SIZE		(1 << STACK_SIZE_SHIFT)
diff --git a/src/third_party/unwind/dist/tests/ia64-test-readonly-asm.S b/src/third_party/unwind/dist/tests/ia64-test-readonly-asm.S
new file mode 100644
index 00000000000..acd3ada2c64
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/ia64-test-readonly-asm.S
@@ -0,0 +1,55 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+	.text
+
+	.global test_func
+	.proc test_func
+test_func:
+	.prologue
+	.regstk 1, 3, 0, 0
+	.save ar.pfs, loc0
+	alloc loc0 = ar.pfs, 1, 3, 0, 0
+	mov loc1 = rp
+	.save rp, r0
+	.save ar.lc, r0
+	.body
+	mov loc2 = gp
+	ld8 r2 = [in0], 8;;
+	ld8 r1 = [in0];;
+	mov b6 = r2
+	br.call.sptk.many rp = b6
+
+	mov gp = loc2
+	mov rp = loc1
+	mov ar.pfs = loc0
+	br.ret.sptk.many rp
+
+	.endp test_func
+
+#ifdef __linux__
+        /* We do not need executable stack.  */
+        .section        .note.GNU-stack,"",@progbits
+#endif
diff --git a/src/third_party/unwind/dist/tests/ia64-test-setjmp.c b/src/third_party/unwind/dist/tests/ia64-test-setjmp.c
new file mode 100644
index 00000000000..50eaa01bc30
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/ia64-test-setjmp.c
@@ -0,0 +1,155 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* Test to verify that we can siglongjmp() into a frame whose register
+   window is not backed by valid memory.  */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <setjmp.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <sys/mman.h>
+
+#ifdef HAVE_IA64INTRIN_H
+# include <ia64intrin.h>
+#endif
+
+static sigjmp_buf env;
+static int return_level;
+static uintptr_t return_bsp;
+static int verbose;
+
+uintptr_t
+get_bsp (void)
+{
+#ifdef __INTEL_COMPILER
+  return __getReg (_IA64_REG_AR_BSP);
+#else
+  return (uintptr_t) __builtin_ia64_bsp ();
+#endif
+}
+
+static void
+sighandler (int signal, void *siginfo, void *sigcontext)
+{
+  ucontext_t *uc = sigcontext;
+  int local = 0;
+
+  if (verbose)
+    printf ("got signal, stack at %p, saved bsp=0x%lx\n",
+	    &local, uc->uc_mcontext.sc_ar_bsp);
+  siglongjmp (env, 1);
+}
+
+/* Direct call of doit () at the end of doit () would get optimized by GCC to
+   a branch.  */
+static void doit (int n);
+typedef void (*doit_type) (int);
+static volatile doit_type doit_pointer = doit;
+
+static void
+doit (int n)
+{
+  uintptr_t guard_page_addr, bsp = get_bsp ();
+  void *ret;
+
+  if (n == 0)
+    {
+      size_t page_size = getpagesize ();
+
+      guard_page_addr = (bsp + page_size - 1) & -page_size;
+      if (verbose)
+	printf ("guard_page_addr = 0x%lx\n", (unsigned long) guard_page_addr);
+      ret = mmap ((void *) guard_page_addr, page_size, PROT_NONE,
+		  MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+      if (ret != (void *) guard_page_addr)
+	{
+	  if (ret == MAP_FAILED)
+	    perror ("mmap");
+	  else
+	    fprintf (stderr, "mmap() returned %p, expected 0x%lx\n",
+		     ret, guard_page_addr);
+	  exit (EXIT_FAILURE);
+	}
+    }
+
+  if (sigsetjmp (env, 1))
+    {
+      return_level = n;
+      return_bsp = bsp;
+    }
+  else
+    (*doit_pointer) (n + 1);
+}
+
+int
+main (int argc, char **argv)
+{
+  struct sigaction sa;
+  stack_t ss;
+
+  if (argc > 1)
+    verbose = 1;
+
+  ss.ss_sp = malloc (2 * SIGSTKSZ);
+  if (ss.ss_sp == NULL)
+    {
+      puts ("failed to allocate alternate stack");
+      return EXIT_FAILURE;
+    }
+  ss.ss_flags = 0;
+  ss.ss_size = 2 * SIGSTKSZ;
+  if (sigaltstack (&ss, NULL) < 0)
+    {
+      printf ("sigaltstack failed: %s\n", strerror (errno));
+      return EXIT_FAILURE;
+    }
+
+  sa.sa_handler = (void (*) (int)) sighandler;
+  sigemptyset (&sa.sa_mask);
+  sa.sa_flags = SA_SIGINFO | SA_ONSTACK;
+  if (sigaction (SIGSEGV, &sa, NULL) < 0)
+    {
+      printf ("sigaction failed: %s\n", strerror (errno));
+      exit (1);
+    }
+
+  doit (0);
+
+  if (verbose)
+    {
+      printf ("sigsetjmp returned at level %d bsp=0x%lx\n",
+	      return_level, return_bsp);
+      puts ("Test succeeded!");
+    }
+  return EXIT_SUCCESS;
+}
diff --git a/src/third_party/unwind/dist/tests/ia64-test-sig.c b/src/third_party/unwind/dist/tests/ia64-test-sig.c
new file mode 100644
index 00000000000..473efe91d75
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/ia64-test-sig.c
@@ -0,0 +1,102 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* This test uses the unwind interface to modify the IP in an ancestor
+   frame while still returning to the parent frame.  */
+
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <libunwind-ia64.h>
+
+#define panic(args...)				\
+	{ fprintf (stderr, args); exit (-1); }
+
+int verbose;
+
+static void
+sighandler (int signal)
+{
+  unw_cursor_t cursor, cursor2;
+  unw_word_t ip;
+  unw_context_t uc;
+
+  if (verbose)
+    printf ("caught signal %d\n", signal);
+
+  unw_getcontext (&uc);
+  if (unw_init_local (&cursor, &uc) < 0)
+    panic ("unw_init() failed!\n");
+
+  /* get cursor for caller of sighandler: */
+  if (unw_step (&cursor) < 0)
+    panic ("unw_step() failed!\n");
+
+  cursor2 = cursor;
+  while (!unw_is_signal_frame (&cursor2))
+    if (unw_step (&cursor2) < 0)
+      panic ("failed to find signal frame!\n");
+
+  if (unw_step (&cursor2) < 0)
+    panic ("unw_step() failed!\n");
+
+  if (unw_get_reg (&cursor2, UNW_REG_IP, &ip) < 0)
+    panic ("failed to get IP!\n");
+
+  /* skip faulting instruction (doesn't handle MLX template) */
+  ++ip;
+  if ((ip & 0x3) == 0x3)
+    ip += 13;
+
+  if (unw_set_reg (&cursor2, UNW_REG_IP, ip) < 0)
+    panic ("failed to set IP!\n");
+
+  unw_resume (&cursor);	/* update context & return to caller of sighandler() */
+
+  panic ("unexpected return from unw_resume()!\n");
+}
+
+static void
+doit (volatile char *p)
+{
+  int ch;
+
+  ch = *p;	/* trigger SIGSEGV */
+
+  if (verbose)
+    printf ("doit: finishing execution!\n");
+}
+
+int
+main (int argc, char **argv)
+{
+  if (argc > 1)
+    verbose = 1;
+
+  signal (SIGSEGV, sighandler);
+  doit (0);
+  if (verbose)
+    printf ("SUCCESS\n");
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/tests/ia64-test-stack-asm.S b/src/third_party/unwind/dist/tests/ia64-test-stack-asm.S
new file mode 100644
index 00000000000..0aea33a4413
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/ia64-test-stack-asm.S
@@ -0,0 +1,183 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "ia64-test-stack.h"
+
+	.common stackmem, NSTACKS*STACK_SIZE, 16
+
+	.global do_unwind_tests
+
+	.text
+
+#define SAVED_SP_OFF		 0
+#define SAVED_RP_OFF		 8
+#define SAVED_PFS_OFF		16
+#define SAVED_RNAT_OFF		24
+#define SAVED_BSP_OFF		32
+#define SAVED_BSPSTORE_OFF	40
+#define FRAME_SIZE		48
+
+	.proc stack_it
+stack_it:
+	.prologue
+	alloc r18 = ar.pfs, 0, 0, 0, 0		// read ar.pfs
+	// first, calculate address of new stack:
+	addl r2 = @ltoff(stackmem), gp
+	shl r3 = r8, STACK_SIZE_SHIFT
+	;;
+	ld8 r2 = [r2]				// r2 = &stackmem
+	;;
+	add r2 = r2, r3				// r2 = stackmem[iteration]
+	;;
+	addl r3 = STACK_SIZE-FRAME_SIZE, r2	// r3 = &stackframe
+	;;
+	st8 [r3] = sp
+	.vframesp SAVED_SP_OFF+16
+	adds sp = -16, r3			// switch the memory stack
+	;;
+	adds r3 = (SAVED_RP_OFF - SAVED_SP_OFF), r3
+	mov r16 = rp
+	;;
+	.savesp rp, SAVED_RP_OFF+16
+	st8 [r3] = r16, (SAVED_PFS_OFF - SAVED_RP_OFF)
+	;;
+	.savesp ar.pfs, SAVED_PFS_OFF+16
+	st8 [r3] = r18, (SAVED_BSP_OFF - SAVED_PFS_OFF)
+
+	mov r16 = ar.bsp
+	mov r17 = ar.bspstore
+	mov r18 = ar.rnat
+	;;
+	.savesp ar.bsp, SAVED_BSP_OFF+16
+	st8 [r3] = r16, (SAVED_BSPSTORE_OFF - SAVED_BSP_OFF)
+	;;
+	.savesp ar.bspstore, SAVED_BSPSTORE_OFF+16
+	st8 [r3] = r17, (SAVED_RNAT_OFF - SAVED_BSPSTORE_OFF)
+	;;
+	.savesp ar.rnat, SAVED_RNAT_OFF+16
+	st8 [r3] = r18
+	;;
+	mov ar.bspstore = r2			// switch the backing store
+
+	.body
+
+	// for even iterations, allocate a local variable:
+	tbit.nz p6, p0 = r8, 0
+(p6)	br.cond.sptk.few .skip
+	;;
+	alloc r2 = ar.pfs, 0, 1, 0, 0
+	mov loc0 = r8
+	;;
+.skip:	cmp.ne p6, p7 = 0, r8
+	;;
+{	.mbb
+(p6)	adds r8 = -1, r8
+(p6)	br.call.sptk.many rp = stack_it		// next iteration
+(p7)	br.call.sptk.many rp = do_unwind_tests	// time for introspection...
+}
+	// switch back to stack:
+
+	adds r3 = SAVED_SP_OFF+16, sp
+	;;
+	ld8 r16 = [r3], (SAVED_RP_OFF-SAVED_SP_OFF);;		// saved sp
+	ld8 r17 = [r3], (SAVED_PFS_OFF-SAVED_RP_OFF);;		// saved rp
+	ld8 r18 = [r3], (SAVED_RNAT_OFF-SAVED_PFS_OFF);;	// saved pfs
+	ld8 r19 = [r3], (SAVED_BSP_OFF-SAVED_RNAT_OFF);;	// saved rnat
+	ld8 r20 = [r3], (SAVED_BSPSTORE_OFF-SAVED_BSP_OFF);;	// saved bsp
+	ld8 r21 = [r3];;				// saved bspstore
+
+	mov rp = r17
+	mov ar.pfs = r18
+	mov ar.bspstore = r21	// this also restores ar.bsp
+	;;
+	mov ar.rnat = r19
+
+	.restore sp
+	mov sp = r16
+	br.ret.sptk.many rp
+	.endp stack_it
+
+
+#define SET_LOC(n)	add loc##n = n, r8
+#define SET_NAT(n)	ld8.s loc##n = [r0]
+
+	.global touch_all
+	.proc touch_all
+touch_all:
+	.prologue
+	.save ar.pfs, r34
+	alloc loc1 = ar.pfs, 1, 94, 1, 0
+	.save rp, loc0
+	mov loc0 = rp
+	.body
+
+	mov ar.rsc = 0		// put RSE into enforced lazy mode
+	shl r8 = in0, 32	// store iteration # in top 32 bits
+	add out0 = -1, in0
+	cmp.eq p6, p7 = 1, in0
+	;;
+	SET_LOC( 2); SET_LOC( 3)
+	SET_LOC( 4); SET_LOC( 5); SET_LOC( 6); SET_LOC( 7)
+	SET_LOC( 8); SET_LOC( 9); SET_LOC(10); SET_LOC(11)
+	SET_LOC(12); SET_LOC(13); SET_LOC(14); SET_LOC(15)
+	SET_LOC(16); SET_LOC(17); SET_LOC(18); SET_LOC(19)
+	SET_LOC(20); SET_LOC(21); SET_LOC(22); SET_LOC(23)
+	SET_LOC(24); SET_LOC(25); SET_LOC(26); SET_LOC(27)
+	SET_LOC(28); SET_LOC(29); SET_LOC(30); SET_LOC(31)
+	SET_LOC(32); SET_LOC(33); SET_LOC(34); SET_LOC(35)
+	SET_LOC(36); SET_LOC(37); SET_LOC(38); SET_LOC(39)
+	SET_LOC(40); SET_LOC(41); SET_LOC(42); SET_LOC(43)
+	SET_LOC(44); SET_LOC(45); SET_LOC(46); SET_LOC(47)
+	SET_LOC(48); SET_LOC(49); SET_LOC(50); SET_LOC(51)
+	SET_LOC(52); SET_LOC(53); SET_LOC(54); SET_LOC(55)
+	SET_LOC(56); SET_LOC(57); SET_LOC(58); SET_LOC(59)
+	SET_LOC(60); SET_LOC(61); SET_LOC(62); SET_LOC(63)
+	SET_LOC(64); SET_LOC(65); SET_LOC(66); SET_LOC(67)
+	SET_LOC(68); SET_LOC(69); SET_LOC(70); SET_LOC(71)
+	SET_LOC(72); SET_LOC(73); SET_LOC(74); SET_LOC(75)
+	SET_LOC(76); SET_LOC(77); SET_LOC(78); SET_LOC(79)
+	SET_LOC(80); SET_LOC(81); SET_LOC(82); SET_LOC(83)
+	SET_LOC(84); SET_LOC(85); SET_LOC(86); SET_LOC(87)
+	SET_LOC(88); SET_LOC(89); SET_LOC(90); SET_LOC(91)
+	SET_LOC(92); SET_LOC(93)
+	;;
+	SET_NAT(2);  SET_NAT(31); SET_NAT(73); SET_NAT(93)
+	;;
+{	.mbb
+	mov r8=NSTACKS-1
+(p6)	br.call.sptk.many rp = stack_it
+(p7)	br.call.sptk.many rp = touch_all
+}
+	;;
+
+	mov rp = loc0
+	mov ar.pfs = loc1
+	br.ret.sptk.many rp
+	.endp touch_all
+
+#ifdef __linux__
+        /* We do not need executable stack.  */
+        .section        .note.GNU-stack,"",@progbits
+#endif
diff --git a/src/third_party/unwind/dist/tests/ia64-test-stack.h b/src/third_party/unwind/dist/tests/ia64-test-stack.h
new file mode 100644
index 00000000000..5665a79d956
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/ia64-test-stack.h
@@ -0,0 +1,3 @@
+#define NSTACKS			1024
+#define STACK_SIZE_SHIFT	17
+#define STACK_SIZE		(1 << STACK_SIZE_SHIFT)
diff --git a/src/third_party/unwind/dist/tests/ident.c b/src/third_party/unwind/dist/tests/ident.c
new file mode 100644
index 00000000000..9024e292f5a
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/ident.c
@@ -0,0 +1,5 @@
+long
+f (long val)
+{
+  return val;
+}
diff --git a/src/third_party/unwind/dist/tests/mapper.c b/src/third_party/unwind/dist/tests/mapper.c
new file mode 100644
index 00000000000..b47ae780f8e
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/mapper.c
@@ -0,0 +1,78 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* This program creates lots of mappings such that on Linux the
+   reading of /proc/PID/maps gets very slow.  With proper caching,
+   test-ptrace should still run at acceptable speed once
+   /proc/PID/maps has been scanned.  If the program dies with a
+   SIGALRM, it means it was running unexpectedly slow.  */
+
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <sys/mman.h>
+
+#if !defined(MAP_ANONYMOUS) && defined(MAP_ANON)
+# define MAP_ANONYMOUS MAP_ANON
+#endif
+#if !defined(MAP_NORESERVE)
+# define MAP_NORESERVE 0
+#endif
+
+int
+main (void)
+{
+  long n = 0;
+
+  signal (SIGUSR1, SIG_IGN);
+  signal (SIGUSR2, SIG_IGN);
+
+  printf ("Starting mmap test...\n");
+  for (n = 0; n < 30000; ++n)
+    {
+      if (mmap (NULL, 1, (n & 1) ? PROT_READ : PROT_WRITE,
+		MAP_PRIVATE | MAP_ANONYMOUS
+#ifdef MAP_NORESERVE
+		| MAP_NORESERVE
+#endif
+		,
+		-1, 0) == MAP_FAILED)
+	{
+	  printf ("Failed after %ld successful maps\n", n - 1);
+	  exit (0);
+	}
+    }
+
+  alarm (80);	/* die if we don't finish in 80 seconds */
+
+  printf ("Turning on single-stepping...\n");
+  kill (getpid (), SIGUSR1);	/* tell test-ptrace to start single-stepping */
+  printf ("Va bene?\n");
+  kill (getpid (), SIGUSR2);	/* tell test-ptrace to stop single-stepping */
+  printf ("Turned single-stepping off...\n");
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/tests/ppc64-test-altivec-utils.c b/src/third_party/unwind/dist/tests/ppc64-test-altivec-utils.c
new file mode 100644
index 00000000000..bd67ff7d6e0
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/ppc64-test-altivec-utils.c
@@ -0,0 +1,32 @@
+#include <stdio.h>
+#include <altivec.h>
+
+union si_overlay
+{
+  vector signed int v;
+  int ints[4];
+};
+
+vector signed int
+vec_init ()
+{
+  vector signed int v;
+  static int count = 1;
+
+  ((union si_overlay *) &v)->ints[0] = count++;
+  ((union si_overlay *) &v)->ints[1] = count++;
+  ((union si_overlay *) &v)->ints[2] = count++;
+  ((union si_overlay *) &v)->ints[3] = count++;
+  return v;
+}
+
+void
+vec_print (vector signed int v)
+{
+  printf ("%08x %08x %08x %08x",
+	 ((union si_overlay *) &v)->ints[0],
+	 ((union si_overlay *) &v)->ints[1],
+	 ((union si_overlay *) &v)->ints[2],
+	 ((union si_overlay *) &v)->ints[3]);
+}
+
diff --git a/src/third_party/unwind/dist/tests/ppc64-test-altivec.c b/src/third_party/unwind/dist/tests/ppc64-test-altivec.c
new file mode 100644
index 00000000000..a3e95eefbbc
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/ppc64-test-altivec.c
@@ -0,0 +1,177 @@
+
+
+#include <libunwind.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <altivec.h>
+
+#include <sys/resource.h>
+
+#define panic(args...)	{ fprintf (stderr, args);  abort(); }
+
+extern vector signed int vec_init ();
+extern void vec_print (vector signed int v);
+
+vector signed int vec_stack (int count);
+
+int
+main ()
+{
+  printf ("&vec_stack = %016lx\n", (unsigned long) vec_stack);
+  vec_stack (3);
+  return 0;
+}
+
+
+vector signed int
+vec_stack (int count)
+{
+  register vector signed int v1;
+  register vector signed int v2;
+  register vector signed int v3;
+  register vector signed int v4;
+  register vector signed int v5;
+  register vector signed int v6;
+  register vector signed int v7;
+  register vector signed int v8;
+  register vector signed int v9;
+
+  unw_fpreg_t vr;
+
+  unw_cursor_t cursor;
+  unw_word_t ip, sp;
+  unw_context_t uc;
+  int ret;
+  int verbose = 1;
+
+  /* if (count == 0) return vec_init(); */
+
+  if (count == 0)
+    {
+      unw_getcontext (&uc);
+      if (unw_init_local (&cursor, &uc) < 0)
+	{
+	  panic ("unw_init_local failed!\n");
+	}
+      else
+	{
+	  do
+	    {
+	      if ((ret = unw_get_reg (&cursor, UNW_REG_IP, &ip)) < 0)
+		{
+		  panic ("FAILURE: unw_get_reg returned %d for UNW_REG_IP\n",
+			 ret);
+		}
+	      if ((ret = unw_get_reg (&cursor, UNW_REG_SP, &sp)) < 0)
+		{
+		  panic ("FAILURE: unw_get_reg returned %d for UNW_REG_SP\n",
+			 ret);
+		}
+	      if ((ret = unw_get_fpreg (&cursor, UNW_PPC64_V30, &vr)) < 0)
+		{
+		  panic
+		    ("FAILURE: unw_get_vreg returned %d for UNW_PPC64_V30\n",
+		     ret);
+		}
+
+
+	      if (verbose)
+		{
+		  const char *regname = unw_regname (UNW_PPC64_V30);
+		  char proc_name_buffer[256];
+		  unw_word_t offset;
+                  unsigned int * vec_half1, * vec_half2;
+                  vec_half1 = (unsigned int *)&vr;
+                  vec_half2 = vec_half1 + 1;
+		  printf ("ip = %016lx, sp=%016lx\n", (long) ip, (long) sp);
+		  printf ("vr30 = %08x %08x %08x %08x\n",
+			  (unsigned int) (*vec_half1 >> 16),
+			  (unsigned int) (*vec_half1 & 0xffffffff),
+			  (unsigned int) (*vec_half2 >> 16),
+			  (unsigned int) (*vec_half2 & 0xffffffff));
+		  ret =
+		    unw_get_proc_name (&cursor, proc_name_buffer,
+				       sizeof (proc_name_buffer), &offset);
+		  if (ret == 0)
+		    {
+		      printf ("proc name = %s, offset = %lx\n",
+			      proc_name_buffer, offset);
+		    }
+		  else
+		    {
+		      panic ("unw_get_proc_name returned %d\n", ret);
+		    }
+		  printf ("unw_regname(UNW_PPC_V30) = %s\n\n", regname);
+		}
+
+	      ret = unw_step (&cursor);
+	      if (ret < 0)
+		{
+		  unw_get_reg (&cursor, UNW_REG_IP, &ip);
+		  panic ("FAILURE: unw_step() returned %d for ip=%lx\n", ret,
+			 (long) ip);
+		}
+	    }
+	  while (ret > 0);
+	}
+    }
+
+  v1 = vec_init ();
+  v2 = vec_init ();
+  v3 = vec_init ();
+  v4 = vec_init ();
+  v5 = vec_init ();
+  v6 = vec_init ();
+
+  /* make use of all of the registers in some calculation */
+  v7 =
+    vec_nor (v1, vec_add (v2, vec_sub (v3, vec_and (v4, vec_or (v5, v6)))));
+
+  /*
+   * "force" the registers to be non-volatile by making a call and also
+   * using the registers after the call.
+   */
+  v8 = vec_stack (count - 1);
+
+  /*
+   * Use the result from the previous call, plus all of the non-volatile
+   * registers in another calculation.
+   */
+  v9 =
+    vec_nor (v1,
+	     vec_add (v2,
+		      vec_sub (v3,
+			       vec_and (v4, vec_or (v5, vec_xor (v6, v8))))));
+
+  printf ("v1 - ");
+  vec_print (v1);
+  printf ("\n");
+  printf ("v2 - ");
+  vec_print (v2);
+  printf ("\n");
+  printf ("v3 - ");
+  vec_print (v3);
+  printf ("\n");
+  printf ("v4 - ");
+  vec_print (v4);
+  printf ("\n");
+  printf ("v5 - ");
+  vec_print (v5);
+  printf ("\n");
+  printf ("v6 - ");
+  vec_print (v6);
+  printf ("\n");
+  printf ("v7 - ");
+  vec_print (v7);
+  printf ("\n");
+  printf ("v8 - ");
+  vec_print (v8);
+  printf ("\n");
+  printf ("v9 - ");
+  vec_print (v9);
+  printf ("\n");
+
+  return v9;
+}
diff --git a/src/third_party/unwind/dist/tests/run-check-namespace b/src/third_party/unwind/dist/tests/run-check-namespace
new file mode 100755
index 00000000000..d57c8642a27
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/run-check-namespace
@@ -0,0 +1,3 @@
+#!/bin/sh
+chmod +x ./check-namespace.sh
+./check-namespace.sh $*
diff --git a/src/third_party/unwind/dist/tests/run-coredump-unwind b/src/third_party/unwind/dist/tests/run-coredump-unwind
new file mode 100755
index 00000000000..8d077425746
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/run-coredump-unwind
@@ -0,0 +1,53 @@
+#!/bin/sh
+
+# this function is slight modification of the one used in RPM
+# found at https://bugzilla.redhat.com/show_bug.cgi?id=834073
+# written by Alexander Larsson <alexl@redhat.com>
+add_minidebug()
+{
+  debuginfo="$1" ## we don't have separate debuginfo file
+  binary="$1"
+
+  dynsyms=`mktemp`
+  funcsyms=`mktemp`
+  keep_symbols=`mktemp`
+  mini_debuginfo=`mktemp`
+
+  # Extract the dynamic symbols from the main binary, there is no need to also have these
+  # in the normal symbol table
+  nm -D "$binary" --format=posix --defined-only | awk '{ print $1 }' | sort > "$dynsyms"
+  # Extract all the text (i.e. function) symbols from the debuginfo 
+  nm "$debuginfo" --format=posix --defined-only | awk '{ if ($2 == "T" || $2 == "t") print $1 }' | sort > "$funcsyms"
+  # Keep all the function symbols not already in the dynamic symbol table
+  comm -13 "$dynsyms" "$funcsyms" > "$keep_symbols"
+  # Copy the full debuginfo, keeping only a minumal set of symbols and removing some unnecessary sections
+  objcopy -S --remove-section .gdb_index --remove-section .comment --keep-symbols="$keep_symbols" "$debuginfo" "$mini_debuginfo" &> /dev/null
+  #Inject the compressed data into the .gnu_debugdata section of the original binary
+  xz "$mini_debuginfo"
+  mini_debuginfo="${mini_debuginfo}.xz"
+  objcopy --add-section .gnu_debugdata="$mini_debuginfo" "$binary"
+  rm -f "$dynsyms" "$funcsyms" "$keep_symbols" "$mini_debuginfo"
+
+  strip "$binary" ## throw away the symbol table
+}
+
+
+TESTDIR=`pwd`
+TEMPDIR=`mktemp --tmpdir -d libunwind-test-XXXXXXXXXX`
+trap "rm -r -- $TEMPDIR" EXIT
+
+cp crasher $TEMPDIR/crasher
+if [ "$1" = "-minidebuginfo" ]; then
+  add_minidebug $TEMPDIR/crasher
+fi
+
+# create core dump
+(
+    cd $TEMPDIR
+    ulimit -c 10000
+    ./crasher backing_files
+) 2>/dev/null
+COREFILE=$TEMPDIR/core*
+
+# magic option -testcase enables checking for the specific contents of the stack
+./test-coredump-unwind $COREFILE -testcase `cat $TEMPDIR/backing_files`
diff --git a/src/third_party/unwind/dist/tests/run-coredump-unwind-mdi b/src/third_party/unwind/dist/tests/run-coredump-unwind-mdi
new file mode 100755
index 00000000000..d0a315b8e32
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/run-coredump-unwind-mdi
@@ -0,0 +1,8 @@
+#!/bin/sh
+
+# This test intends to test the unw_get_proc_name function on binaries without
+# the symbol table but with so called MiniDebuginfo available. In particular,
+# it is tested using the coredump accessors. For more info about MiniDebugInfo
+# see e.g. http://fedoraproject.org/wiki/Features/MiniDebugInfo
+
+${0%/*}/run-coredump-unwind -minidebuginfo
diff --git a/src/third_party/unwind/dist/tests/run-ia64-test-dyn1 b/src/third_party/unwind/dist/tests/run-ia64-test-dyn1
new file mode 100755
index 00000000000..acce944ca15
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/run-ia64-test-dyn1
@@ -0,0 +1,2 @@
+#!/bin/sh
+./test-ptrace -t ./ia64-test-dyn1
diff --git a/src/third_party/unwind/dist/tests/run-ptrace-mapper b/src/third_party/unwind/dist/tests/run-ptrace-mapper
new file mode 100755
index 00000000000..dc3010d4b33
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/run-ptrace-mapper
@@ -0,0 +1,2 @@
+#!/bin/sh
+./test-ptrace -c -n -t ./mapper $*
diff --git a/src/third_party/unwind/dist/tests/run-ptrace-misc b/src/third_party/unwind/dist/tests/run-ptrace-misc
new file mode 100755
index 00000000000..c3a6552f1de
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/run-ptrace-misc
@@ -0,0 +1,2 @@
+#!/bin/sh
+./test-ptrace -c -t ./test-ptrace-misc
diff --git a/src/third_party/unwind/dist/tests/test-async-sig.c b/src/third_party/unwind/dist/tests/test-async-sig.c
new file mode 100644
index 00000000000..2ce8b4bb711
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/test-async-sig.c
@@ -0,0 +1,193 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* Check whether basic unwinding truly is async-signal safe.  */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "compiler.h"
+
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <sys/time.h>
+
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+
+static const int nerrors_max = 100;
+
+struct itimerval interval =
+  {
+    .it_interval = { .tv_sec = 0, .tv_usec = 0 },
+    .it_value    = { .tv_sec = 0, .tv_usec = 1000 }
+  };
+
+int verbose;
+int nerrors;
+int sigcount;
+
+#ifndef CONFIG_BLOCK_SIGNALS
+/* When libunwind is configured with --enable-block-signals=no, the caller
+   is responsible for preventing recursion via signal handlers.
+   We use a simple global here.  In a multithreaded program, one would use
+   a thread-local variable.  */
+int recurcount;
+#endif
+
+#define panic(args...)					\
+	{ ++nerrors; fprintf (stderr, args); return; }
+
+static void
+do_backtrace (int may_print, int get_proc_name)
+{
+  char buf[512], name[256];
+  unw_cursor_t cursor;
+  unw_word_t ip, sp, off;
+  unw_context_t uc;
+  int ret;
+  int depth = 0;
+
+#ifndef CONFIG_BLOCK_SIGNALS
+  if (recurcount > 0)
+    return;
+  recurcount += 1;
+#endif
+
+  unw_getcontext (&uc);
+  if (unw_init_local (&cursor, &uc) < 0)
+    panic ("unw_init_local failed!\n");
+
+  do
+    {
+      unw_get_reg (&cursor, UNW_REG_IP, &ip);
+      unw_get_reg (&cursor, UNW_REG_SP, &sp);
+
+      buf[0] = '\0';
+      if (get_proc_name || (may_print && verbose))
+	{
+	  ret = unw_get_proc_name (&cursor, name, sizeof (name), &off);
+	  if (ret == 0 && (may_print && verbose))
+	    {
+	      if (off)
+		snprintf (buf, sizeof (buf), "<%s+0x%lx>", name, (long) off);
+	      else
+		{
+		  size_t len = strlen (name);
+		  buf[0] = '<';
+		  memcpy (buf + 1, name, len);
+		  buf[len + 1] = '>';
+		  buf[len + 2] = '\0';
+		}
+	    }
+	}
+
+      if (may_print && verbose)
+	printf ("%016lx %-32s (sp=%016lx)\n", (long) ip, buf, (long) sp);
+
+      ret = unw_step (&cursor);
+      if (ret < 0)
+	{
+	  unw_get_reg (&cursor, UNW_REG_IP, &ip);
+	  panic ("FAILURE: unw_step() returned %d for ip=%lx\n",
+		 ret, (long) ip);
+	}
+      if (depth++ > 100)
+        {
+	  panic ("FAILURE: unw_step() looping over %d iterations\n", depth);
+	  break;
+        }
+    }
+  while (ret > 0);
+
+#ifndef CONFIG_BLOCK_SIGNALS
+  recurcount -= 1;
+#endif
+}
+
+void
+sighandler (int signal)
+{
+  if (verbose)
+    printf ("sighandler(signal=%d, count=%d)\n", signal, sigcount);
+
+  do_backtrace (1, 1);
+
+  ++sigcount;
+
+  if (sigcount == 100)
+    unw_set_caching_policy (unw_local_addr_space, UNW_CACHE_GLOBAL);
+  else if (sigcount == 200)
+    unw_set_caching_policy (unw_local_addr_space, UNW_CACHE_PER_THREAD);
+  else if (sigcount == 300 || nerrors > nerrors_max)
+    {
+      if (nerrors > nerrors_max)
+        panic ("Too many errors (%d)\n", nerrors);
+      if (nerrors)
+	{
+	  fprintf (stderr, "FAILURE: detected %d errors\n", nerrors);
+	  exit (-1);
+	}
+      if (verbose)
+	printf ("SUCCESS.\n");
+      exit (0);
+    }
+  setitimer (ITIMER_VIRTUAL, &interval, NULL);
+}
+
+int
+main (int argc, char **argv UNUSED)
+{
+  struct sigaction act;
+  long i = 0;
+
+  if (argc > 1)
+    verbose = 1;
+
+  unw_set_caching_policy (unw_local_addr_space, UNW_CACHE_NONE);
+
+  memset (&act, 0, sizeof (act));
+  act.sa_handler = sighandler;
+  act.sa_flags = SA_SIGINFO;
+  sigaction (SIGVTALRM, &act, NULL);
+
+  setitimer (ITIMER_VIRTUAL, &interval, NULL);
+
+  while (1)
+    {
+      if (0 && verbose)
+	printf ("%s: starting backtrace\n", __FUNCTION__);
+      do_backtrace (0, (i++ % 100) == 0);
+      if (nerrors > nerrors_max)
+        {
+	  fprintf (stderr, "Too many errors (%d)\n", nerrors);
+	  exit (-1);
+        }
+    }
+  return (0);
+}
diff --git a/src/third_party/unwind/dist/tests/test-coredump-unwind.c b/src/third_party/unwind/dist/tests/test-coredump-unwind.c
new file mode 100644
index 00000000000..53498237c2f
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/test-coredump-unwind.c
@@ -0,0 +1,395 @@
+/*
+ * Example program for unwinding core dumps.
+ *
+ * Compile a-la:
+ * gcc -Os -Wall \
+ *    -Wl,--start-group \
+ *        -lunwind -lunwind-x86 -lunwind-coredump \
+ *        example-core-unwind.c \
+ *    -Wl,--end-group \
+ *    -oexample-core-unwind
+ *
+ * Run:
+ * eu-unstrip -n --core COREDUMP
+ *   figure out which virtual addresses in COREDUMP correspond to which mapped executable files
+ *   (binary and libraries), then supply them like this:
+ * ./example-core-unwind COREDUMP 0x400000:/bin/crashed_program 0x3458600000:/lib/libc.so.6 [...]
+ *
+ * Note: Program eu-unstrip is part of elfutils, virtual addresses of shared
+ * libraries can be determined by ldd (at least on linux).
+ */
+
+#include "compiler.h"
+
+#undef _GNU_SOURCE
+#define _GNU_SOURCE 1
+#undef __USE_GNU
+#define __USE_GNU 1
+
+#include <assert.h>
+#include <ctype.h>
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <setjmp.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <string.h>
+#include <syslog.h>
+#include <sys/poll.h>
+#include <sys/mman.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <sys/param.h>
+#include <termios.h>
+#include <time.h>
+#include <unistd.h>
+#include <stdbool.h>
+#include <limits.h>
+#include <pwd.h>
+#include <grp.h>
+
+/* For SIGSEGV handler code */
+#include <execinfo.h>
+#include <sys/ucontext.h>
+
+#include <libunwind-coredump.h>
+
+
+/* Utility logging functions */
+
+enum {
+    LOGMODE_NONE = 0,
+    LOGMODE_STDIO = (1 << 0),
+    LOGMODE_SYSLOG = (1 << 1),
+    LOGMODE_BOTH = LOGMODE_SYSLOG + LOGMODE_STDIO,
+};
+const char *msg_prefix = "";
+const char *msg_eol = "\n";
+int logmode = LOGMODE_STDIO;
+int xfunc_error_retval = EXIT_FAILURE;
+
+void xfunc_die(void)
+{
+  exit(xfunc_error_retval);
+}
+
+static void verror_msg_helper(const char *s,
+                              va_list p,
+                              const char* strerr,
+                              int flags)
+{
+  char *msg;
+  int prefix_len, strerr_len, msgeol_len, used;
+
+  if (!logmode)
+    return;
+
+  used = vasprintf(&msg, s, p);
+  if (used < 0)
+    return;
+
+  /* This is ugly and costs +60 bytes compared to multiple
+   * fprintf's, but is guaranteed to do a single write.
+   * This is needed for e.g. when multiple children
+   * can produce log messages simultaneously. */
+
+  prefix_len = msg_prefix[0] ? strlen(msg_prefix) + 2 : 0;
+  strerr_len = strerr ? strlen(strerr) : 0;
+  msgeol_len = strlen(msg_eol);
+  /* +3 is for ": " before strerr and for terminating NUL */
+  char *msg1 = (char*) realloc(msg, prefix_len + used + strerr_len + msgeol_len + 3);
+  if (!msg1)
+    {
+      free(msg);
+      return;
+    }
+  msg = msg1;
+  /* TODO: maybe use writev instead of memmoving? Need full_writev? */
+  if (prefix_len)
+    {
+      char *p;
+      memmove(msg + prefix_len, msg, used);
+      used += prefix_len;
+      p = stpcpy(msg, msg_prefix);
+      p[0] = ':';
+      p[1] = ' ';
+    }
+  if (strerr)
+    {
+      if (s[0])
+        {
+          msg[used++] = ':';
+          msg[used++] = ' ';
+        }
+      strcpy(&msg[used], strerr);
+      used += strerr_len;
+    }
+  strcpy(&msg[used], msg_eol);
+
+  if (flags & LOGMODE_STDIO)
+    {
+      fflush(stdout);
+      write(STDERR_FILENO, msg, used + msgeol_len);
+    }
+  msg[used] = '\0'; /* remove msg_eol (usually "\n") */
+  if (flags & LOGMODE_SYSLOG)
+    {
+      syslog(LOG_ERR, "%s", msg + prefix_len);
+    }
+  free(msg);
+}
+
+void log_msg(const char *s, ...)
+{
+  va_list p;
+  va_start(p, s);
+  verror_msg_helper(s, p, NULL, logmode);
+  va_end(p);
+}
+/* It's a macro, not function, since it collides with log() from math.h */
+#undef log
+#define log(...) log_msg(__VA_ARGS__)
+
+void error_msg(const char *s, ...)
+{
+  va_list p;
+  va_start(p, s);
+  verror_msg_helper(s, p, NULL, logmode);
+  va_end(p);
+}
+
+void error_msg_and_die(const char *s, ...)
+{
+  va_list p;
+  va_start(p, s);
+  verror_msg_helper(s, p, NULL, logmode);
+  va_end(p);
+  xfunc_die();
+}
+
+void perror_msg(const char *s, ...)
+{
+  va_list p;
+  va_start(p, s);
+  /* Guard against "<error message>: Success" */
+  verror_msg_helper(s, p, errno ? strerror(errno) : NULL, logmode);
+  va_end(p);
+}
+
+void perror_msg_and_die(const char *s, ...)
+{
+  va_list p;
+  va_start(p, s);
+  /* Guard against "<error message>: Success" */
+  verror_msg_helper(s, p, errno ? strerror(errno) : NULL, logmode);
+  va_end(p);
+  xfunc_die();
+}
+
+void die_out_of_memory(void)
+{
+  error_msg_and_die("Out of memory, exiting");
+}
+
+/* End of utility logging functions */
+
+
+
+static
+void handle_sigsegv(int sig, siginfo_t *info, void *ucontext)
+{
+  long ip = 0;
+  ucontext_t *uc UNUSED;
+
+  uc = ucontext;
+#if defined(__linux__)
+#ifdef UNW_TARGET_X86
+	ip = uc->uc_mcontext.gregs[REG_EIP];
+#elif defined(UNW_TARGET_X86_64)
+	ip = uc->uc_mcontext.gregs[REG_RIP];
+#elif defined(UNW_TARGET_ARM)
+	ip = uc->uc_mcontext.arm_pc;
+#endif
+#elif defined(__FreeBSD__)
+#ifdef __i386__
+	ip = uc->uc_mcontext.mc_eip;
+#elif defined(__amd64__)
+	ip = uc->uc_mcontext.mc_rip;
+#else
+#error Port me
+#endif
+#else
+#error Port me
+#endif
+  dprintf(2, "signal:%d address:0x%lx ip:0x%lx\n",
+			sig,
+			/* this is void*, but using %p would print "(null)"
+			 * even for ptrs which are not exactly 0, but, say, 0x123:
+			 */
+			(long)info->si_addr,
+			ip);
+
+  {
+    /* glibc extension */
+    void *array[50];
+    int size;
+    size = backtrace(array, 50);
+#ifdef __linux__
+    backtrace_symbols_fd(array, size, 2);
+#endif
+  }
+
+  _exit(1);
+}
+
+static void install_sigsegv_handler(void)
+{
+  struct sigaction sa;
+  memset(&sa, 0, sizeof(sa));
+  sa.sa_sigaction = handle_sigsegv;
+  sa.sa_flags = SA_SIGINFO;
+  sigaction(SIGSEGV, &sa, NULL);
+  sigaction(SIGILL, &sa, NULL);
+  sigaction(SIGFPE, &sa, NULL);
+  sigaction(SIGBUS, &sa, NULL);
+}
+
+int
+main(int argc UNUSED, char **argv)
+{
+  unw_addr_space_t as;
+  struct UCD_info *ui;
+  unw_cursor_t c;
+  int ret;
+
+#define TEST_FRAMES 4
+#define TEST_NAME_LEN 32
+  int testcase = 0;
+  int test_cur = 0;
+  long test_start_ips[TEST_FRAMES];
+  char test_names[TEST_FRAMES][TEST_NAME_LEN];
+
+  install_sigsegv_handler();
+
+  const char *progname = strrchr(argv[0], '/');
+  if (progname)
+    progname++;
+  else
+    progname = argv[0];
+
+  if (!argv[1])
+    error_msg_and_die("Usage: %s COREDUMP [VADDR:BINARY_FILE]...", progname);
+
+  msg_prefix = progname;
+
+  as = unw_create_addr_space(&_UCD_accessors, 0);
+  if (!as)
+    error_msg_and_die("unw_create_addr_space() failed");
+
+  ui = _UCD_create(argv[1]);
+  if (!ui)
+    error_msg_and_die("_UCD_create('%s') failed", argv[1]);
+  ret = unw_init_remote(&c, as, ui);
+  if (ret < 0)
+    error_msg_and_die("unw_init_remote() failed: ret=%d\n", ret);
+
+  argv += 2;
+
+  /* Enable checks for the crasher test program? */
+  if (*argv && !strcmp(*argv, "-testcase"))
+  {
+    testcase = 1;
+    logmode = LOGMODE_NONE;
+    argv++;
+  }
+
+  while (*argv)
+    {
+      char *colon;
+      unsigned long vaddr = strtoul(*argv, &colon, 16);
+      if (*colon != ':')
+        error_msg_and_die("Bad format: '%s'", *argv);
+      if (_UCD_add_backing_file_at_vaddr(ui, vaddr, colon + 1) < 0)
+        error_msg_and_die("Can't add backing file '%s'", colon + 1);
+      argv++;
+    }
+
+  for (;;)
+    {
+      unw_word_t ip;
+      ret = unw_get_reg(&c, UNW_REG_IP, &ip);
+      if (ret < 0)
+        error_msg_and_die("unw_get_reg(UNW_REG_IP) failed: ret=%d\n", ret);
+
+      unw_proc_info_t pi;
+      ret = unw_get_proc_info(&c, &pi);
+      if (ret < 0)
+        error_msg_and_die("unw_get_proc_info(ip=0x%lx) failed: ret=%d\n", (long) ip, ret);
+
+      if (!testcase)
+        printf("\tip=0x%08lx proc=%08lx-%08lx handler=0x%08lx lsda=0x%08lx\n",
+				(long) ip,
+				(long) pi.start_ip, (long) pi.end_ip,
+				(long) pi.handler, (long) pi.lsda);
+
+      if (testcase && test_cur < TEST_FRAMES)
+        {
+           unw_word_t off;
+
+           test_start_ips[test_cur] = (long) pi.start_ip;
+           if (unw_get_proc_name(&c, test_names[test_cur], sizeof(test_names[0]), &off) != 0)
+           {
+             test_names[test_cur][0] = '\0';
+           }
+           test_cur++;
+        }
+
+      log("step");
+      ret = unw_step(&c);
+      log("step done:%d", ret);
+      if (ret < 0)
+    	error_msg_and_die("FAILURE: unw_step() returned %d", ret);
+      if (ret == 0)
+        break;
+    }
+  log("stepping ended");
+
+  /* Check that the second and third frames are equal, but distinct of the
+   * others */
+  if (testcase &&
+       (test_cur != 4
+       || test_start_ips[1] != test_start_ips[2]
+       || test_start_ips[0] == test_start_ips[1]
+       || test_start_ips[2] == test_start_ips[3]
+       )
+     )
+    {
+      fprintf(stderr, "FAILURE: start IPs incorrect\n");
+      return -1;
+    }
+
+  if (testcase &&
+       (  strcmp(test_names[0], "a")
+       || strcmp(test_names[1], "b")
+       || strcmp(test_names[2], "b")
+       || strcmp(test_names[3], "main")
+       )
+     )
+    {
+      fprintf(stderr, "FAILURE: procedure names are missing/incorrect\n");
+      return -1;
+    }
+
+  _UCD_destroy(ui);
+  unw_destroy_addr_space(as);
+
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/tests/test-flush-cache.c b/src/third_party/unwind/dist/tests/test-flush-cache.c
new file mode 100644
index 00000000000..1611cf48efd
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/test-flush-cache.c
@@ -0,0 +1,143 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Copyright (c) 2003 Hewlett-Packard Co.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <stdio.h>
+#include <string.h>
+
+#define UNW_LOCAL_ONLY	/* must define this for consistency with backtrace() */
+#include <libunwind.h>
+
+int verbose;
+
+int
+f257 (void)
+{
+  void *buffer[300];
+  int i, n;
+
+  if (verbose)
+    printf ("First backtrace:\n");
+  n = unw_backtrace (buffer, 300);
+  if (verbose)
+    for (i = 0; i < n; ++i)
+      printf ("[%d] ip=%p\n", i, buffer[i]);
+
+  unw_set_cache_size (unw_local_addr_space, 1023, 0);
+  unw_flush_cache (unw_local_addr_space, 0, 0);
+
+  if (verbose)
+    printf ("\nSecond backtrace:\n");
+  n = unw_backtrace (buffer, 300);
+  if (verbose)
+    for (i = 0; i < n; ++i)
+      printf ("[%d] ip=%p\n", i, buffer[i]);
+  return 0;
+}
+
+#define F(n,m)					\
+int						\
+f##n (void)					\
+{						\
+  return f##m ();				\
+}
+
+/* Here, we rely on the fact that the script-cache's hash-table is 256
+   entries big.  With 257 functions, we're guaranteed to get at least
+   one hash-collision.  */
+F(256,257)	F(255,256)	F(254,255)	F(253,254)
+F(252,253)	F(251,252)	F(250,251)	F(249,250)
+F(248,249)	F(247,248)	F(246,247)	F(245,246)
+F(244,245)	F(243,244)	F(242,243)	F(241,242)
+F(240,241)	F(239,240)	F(238,239)	F(237,238)
+F(236,237)	F(235,236)	F(234,235)	F(233,234)
+F(232,233)	F(231,232)	F(230,231)	F(229,230)
+F(228,229)	F(227,228)	F(226,227)	F(225,226)
+F(224,225)	F(223,224)	F(222,223)	F(221,222)
+F(220,221)	F(219,220)	F(218,219)	F(217,218)
+F(216,217)	F(215,216)	F(214,215)	F(213,214)
+F(212,213)	F(211,212)	F(210,211)	F(209,210)
+F(208,209)	F(207,208)	F(206,207)	F(205,206)
+F(204,205)	F(203,204)	F(202,203)	F(201,202)
+F(200,201)	F(199,200)	F(198,199)	F(197,198)
+F(196,197)	F(195,196)	F(194,195)	F(193,194)
+F(192,193)	F(191,192)	F(190,191)	F(189,190)
+F(188,189)	F(187,188)	F(186,187)	F(185,186)
+F(184,185)	F(183,184)	F(182,183)	F(181,182)
+F(180,181)	F(179,180)	F(178,179)	F(177,178)
+F(176,177)	F(175,176)	F(174,175)	F(173,174)
+F(172,173)	F(171,172)	F(170,171)	F(169,170)
+F(168,169)	F(167,168)	F(166,167)	F(165,166)
+F(164,165)	F(163,164)	F(162,163)	F(161,162)
+F(160,161)	F(159,160)	F(158,159)	F(157,158)
+F(156,157)	F(155,156)	F(154,155)	F(153,154)
+F(152,153)	F(151,152)	F(150,151)	F(149,150)
+F(148,149)	F(147,148)	F(146,147)	F(145,146)
+F(144,145)	F(143,144)	F(142,143)	F(141,142)
+F(140,141)	F(139,140)	F(138,139)	F(137,138)
+F(136,137)	F(135,136)	F(134,135)	F(133,134)
+F(132,133)	F(131,132)	F(130,131)	F(129,130)
+F(128,129)	F(127,128)	F(126,127)	F(125,126)
+F(124,125)	F(123,124)	F(122,123)	F(121,122)
+F(120,121)	F(119,120)	F(118,119)	F(117,118)
+F(116,117)	F(115,116)	F(114,115)	F(113,114)
+F(112,113)	F(111,112)	F(110,111)	F(109,110)
+F(108,109)	F(107,108)	F(106,107)	F(105,106)
+F(104,105)	F(103,104)	F(102,103)	F(101,102)
+F(100,101)	F(99,100)	F(98,99)	F(97,98)
+F(96,97)	F(95,96)	F(94,95)	F(93,94)
+F(92,93)	F(91,92)	F(90,91)	F(89,90)
+F(88,89)	F(87,88)	F(86,87)	F(85,86)
+F(84,85)	F(83,84)	F(82,83)	F(81,82)
+F(80,81)	F(79,80)	F(78,79)	F(77,78)
+F(76,77)	F(75,76)	F(74,75)	F(73,74)
+F(72,73)	F(71,72)	F(70,71)	F(69,70)
+F(68,69)	F(67,68)	F(66,67)	F(65,66)
+F(64,65)	F(63,64)	F(62,63)	F(61,62)
+F(60,61)	F(59,60)	F(58,59)	F(57,58)
+F(56,57)	F(55,56)	F(54,55)	F(53,54)
+F(52,53)	F(51,52)	F(50,51)	F(49,50)
+F(48,49)	F(47,48)	F(46,47)	F(45,46)
+F(44,45)	F(43,44)	F(42,43)	F(41,42)
+F(40,41)	F(39,40)	F(38,39)	F(37,38)
+F(36,37)	F(35,36)	F(34,35)	F(33,34)
+F(32,33)	F(31,32)	F(30,31)	F(29,30)
+F(28,29)	F(27,28)	F(26,27)	F(25,26)
+F(24,25)	F(23,24)	F(22,23)	F(21,22)
+F(20,21)	F(19,20)	F(18,19)	F(17,18)
+F(16,17)	F(15,16)	F(14,15)	F(13,14)
+F(12,13)	F(11,12)	F(10,11)	F(9,10)
+F(8,9)		F(7,8)		F(6,7)		F(5,6)
+F(4,5)		F(3,4)		F(2,3)		F(1,2)
+
+int
+main (int argc, char **argv)
+{
+  if (argc > 1 && strcmp (argv[1], "-v") == 0)
+    verbose = 1;
+
+  return f1 ();
+}
diff --git a/src/third_party/unwind/dist/tests/test-init-remote.c b/src/third_party/unwind/dist/tests/test-init-remote.c
new file mode 100644
index 00000000000..66f2d6a1e0c
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/test-init-remote.c
@@ -0,0 +1,103 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Copyright (c) 2002 Hewlett-Packard Co.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* This test simply verifies that unw_init_remote() can be used in
+   lieu of unw_init_local().  This was broken for a while on ia64.  */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include "compiler.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <libunwind.h>
+
+#define panic(args...)				\
+	{ fprintf (stderr, args); exit (-1); }
+
+int verbose;
+
+static int
+do_backtrace (void)
+{
+  char buf[512], name[256];
+  unw_word_t ip, sp, off;
+  unw_cursor_t cursor;
+  unw_context_t uc;
+  int ret;
+
+  unw_getcontext (&uc);
+  if (unw_init_remote (&cursor, unw_local_addr_space, &uc) < 0)
+    panic ("unw_init_remote failed!\n");
+
+  do
+    {
+      unw_get_reg (&cursor, UNW_REG_IP, &ip);
+      unw_get_reg (&cursor, UNW_REG_SP, &sp);
+      buf[0] = '\0';
+      if (unw_get_proc_name (&cursor, name, sizeof (name), &off) == 0)
+	{
+	  if (off)
+	    snprintf (buf, sizeof (buf), "<%s+0x%lx>", name, (long) off);
+	  else
+	    snprintf (buf, sizeof (buf), "<%s>", name);
+	}
+      if (verbose)
+	printf ("%016lx %-32s (sp=%016lx)\n", (long) ip, buf, (long) sp);
+
+      ret = unw_step (&cursor);
+      if (ret < 0)
+	{
+	  unw_get_reg (&cursor, UNW_REG_IP, &ip);
+	  printf ("FAILURE: unw_step() returned %d for ip=%lx\n",
+		  ret, (long) ip);
+	  return -1;
+	}
+    }
+  while (ret > 0);
+
+  return 0;
+}
+
+static int
+foo (void)
+{
+  return do_backtrace ();
+}
+
+int
+main (int argc, char **argv UNUSED)
+{
+  verbose = (argc > 1);
+
+  if (verbose)
+    printf ("Normal backtrace:\n");
+  return foo ();
+}
diff --git a/src/third_party/unwind/dist/tests/test-mem.c b/src/third_party/unwind/dist/tests/test-mem.c
new file mode 100644
index 00000000000..52c977488ac
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/test-mem.c
@@ -0,0 +1,103 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Copyright (c) 2003 Hewlett-Packard Co.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "compiler.h"
+
+#include <libunwind.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <sys/resource.h>
+
+#define panic(args...)				\
+	{ fprintf (stderr, args); exit (-1); }
+
+int verbose;
+
+static void
+do_backtrace (void)
+{
+  unw_cursor_t cursor;
+  unw_word_t ip, sp;
+  unw_context_t uc;
+  int ret;
+
+  unw_getcontext (&uc);
+  if (unw_init_local (&cursor, &uc) < 0)
+    panic ("unw_init_local failed!\n");
+
+  do
+    {
+      unw_get_reg (&cursor, UNW_REG_IP, &ip);
+      unw_get_reg (&cursor, UNW_REG_SP, &sp);
+
+      if (verbose)
+	printf ("%016lx (sp=%016lx)\n", (long) ip, (long) sp);
+
+      ret = unw_step (&cursor);
+      if (ret < 0)
+	{
+	  unw_get_reg (&cursor, UNW_REG_IP, &ip);
+	  panic ("FAILURE: unw_step() returned %d for ip=%lx\n",
+		 ret, (long) ip);
+	}
+    }
+  while (ret > 0);
+}
+
+int
+consume_some_stack_space (void)
+{
+  unw_cursor_t cursor;
+  unw_context_t uc;
+  char string[1024];
+
+  memset (&cursor, 0, sizeof (cursor));
+  memset (&uc, 0, sizeof (uc));
+  return sprintf (string, "hello %p %p\n", &cursor, &uc);
+}
+
+int
+main (int argc, char **argv UNUSED)
+{
+  struct rlimit rlim;
+
+  verbose = argc > 1;
+
+  if (consume_some_stack_space () > 9999)
+    exit (-1);	/* can't happen, but don't let the compiler know... */
+
+  rlim.rlim_cur = 0;
+  rlim.rlim_max = RLIM_INFINITY;
+  setrlimit (RLIMIT_DATA, &rlim);
+  setrlimit (RLIMIT_AS, &rlim);
+
+  do_backtrace ();
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/tests/test-proc-info.c b/src/third_party/unwind/dist/tests/test-proc-info.c
new file mode 100644
index 00000000000..c4145bc374e
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/test-proc-info.c
@@ -0,0 +1,171 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Copyright (c) 2003 Hewlett-Packard Co.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* This test program checks whether proc_info lookup failures are
+   cached.  They must NOT be cached because it could otherwise turn
+   temporary failures into permanent ones.  Furthermore, we allow apps
+   to return -UNW_ESTOPUNWIND to terminate unwinding (though this
+   feature is deprecated and dynamic unwind info should be used
+   instead).  */
+
+#include <stdio.h>
+#include <string.h>
+
+#include <libunwind.h>
+#include "compiler.h"
+
+int errors;
+
+#define panic(args...)					\
+	{ ++errors; fprintf (stderr, args); return -1; }
+
+static int
+find_proc_info (unw_addr_space_t as UNUSED,
+                unw_word_t ip UNUSED,
+                unw_proc_info_t *pip UNUSED,
+                int need_unwind_info UNUSED,
+                void *arg UNUSED)
+{
+  return -UNW_ESTOPUNWIND;
+}
+
+static int
+access_mem (unw_addr_space_t as UNUSED,
+            unw_word_t addr UNUSED,
+            unw_word_t *valp, int write,
+            void *arg UNUSED)
+{
+  if (!write)
+    *valp = 0;
+  return 0;
+}
+
+static int
+access_reg (unw_addr_space_t as UNUSED,
+            unw_regnum_t regnum UNUSED,
+            unw_word_t *valp, int write,
+            void *arg UNUSED)
+{
+  if (!write)
+    *valp = 32;
+  return 0;
+}
+
+static int
+access_fpreg (unw_addr_space_t as UNUSED,
+              unw_regnum_t regnum UNUSED,
+              unw_fpreg_t *valp, int write,
+              void *arg UNUSED)
+{
+  if (!write)
+    memset (valp, 0, sizeof (*valp));
+  return 0;
+}
+
+static int
+get_dyn_info_list_addr (unw_addr_space_t as UNUSED,
+                        unw_word_t *dilap UNUSED,
+                        void *arg UNUSED)
+{
+  return -UNW_ENOINFO;
+}
+
+static void
+put_unwind_info (unw_addr_space_t as UNUSED,
+                 unw_proc_info_t *pi UNUSED,
+                 void *arg UNUSED)
+{
+  ++errors;
+  fprintf (stderr, "%s() got called!\n", __FUNCTION__);
+}
+
+static int
+resume (unw_addr_space_t as UNUSED,
+        unw_cursor_t *reg UNUSED,
+        void *arg UNUSED)
+{
+  panic ("%s() got called!\n", __FUNCTION__);
+}
+
+static int
+get_proc_name (unw_addr_space_t as UNUSED,
+               unw_word_t ip UNUSED,
+               char *buf UNUSED,
+               size_t buf_len UNUSED,
+               unw_word_t *offp UNUSED,
+               void *arg UNUSED)
+{
+  panic ("%s() got called!\n", __FUNCTION__);
+}
+
+int
+main (int argc, char **argv)
+{
+  unw_accessors_t acc;
+  unw_addr_space_t as;
+  int ret, verbose = 0;
+  unw_cursor_t c;
+
+  if (argc > 1 && strcmp (argv[1], "-v") == 0)
+    verbose = 1;
+
+  memset (&acc, 0, sizeof (acc));
+  acc.find_proc_info = find_proc_info;
+  acc.put_unwind_info = put_unwind_info;
+  acc.get_dyn_info_list_addr = get_dyn_info_list_addr;
+  acc.access_mem = access_mem;
+  acc.access_reg = access_reg;
+  acc.access_fpreg = access_fpreg;
+  acc.resume = resume;
+  acc.get_proc_name = get_proc_name;
+
+  as = unw_create_addr_space (&acc, 0);
+  if (!as)
+    panic ("unw_create_addr_space() failed\n");
+
+  unw_set_caching_policy (as, UNW_CACHE_GLOBAL);
+
+  ret = unw_init_remote (&c, as, NULL);
+  if (ret < 0)
+    panic ("unw_init_remote() returned %d instead of 0\n", ret);
+
+  ret = unw_step (&c);
+  if (ret != -UNW_ESTOPUNWIND)
+    panic ("First call to unw_step() returned %d instead of %d\n",
+	   ret, -UNW_ESTOPUNWIND);
+
+  ret = unw_step (&c);
+  if (ret != -UNW_ESTOPUNWIND)
+    panic ("Second call to unw_step() returned %d instead of %d\n",
+	   ret, -UNW_ESTOPUNWIND);
+
+  unw_destroy_addr_space (as);
+
+  if (verbose)
+    printf ("SUCCESS\n");
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/tests/test-ptrace-misc.c b/src/third_party/unwind/dist/tests/test-ptrace-misc.c
new file mode 100644
index 00000000000..374059dc44a
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/test-ptrace-misc.c
@@ -0,0 +1,120 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "compiler.h"
+
+#include <signal.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <sys/types.h>
+
+pid_t self;
+int global[64];
+
+int
+func (int arg)
+{
+  int sum = 0, i, max, arr[1024];
+
+  if (arg == 0)
+    {
+      sum = global[2];
+      sum += sum + sum * getppid ();
+      return sum;
+    }
+  else
+    {
+      max = arg;
+      if (max >= 64)
+	max = 64;
+
+      for (i = 0; i < max; ++i)
+	arr[i] = func (arg - 1);
+
+      for (i = 0; i < max; ++i)
+	if (arr[i] > 16)
+	  sum += arr[i];
+	else
+	  sum -= arr[i];
+    }
+  return sum;
+}
+
+int
+bar (int v)
+{
+  extern long f (long);
+  int arr[1] = { v };
+  uintptr_t r;
+
+  /* This is a vain attempt to use up lots of registers to force
+     the frame-chain info to be saved on the memory stack on ia64.
+     It happens to work with gcc v3.3.4 and gcc v3.4.1 but perhaps
+     not with any other compiler.  */
+  r = (uintptr_t) malloc(f (arr[0])
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+       + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + f (v))
+       ))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))
+       )))))))))))))))))))))))))))))))))))))))))))))))))))))));
+  if (r < 2)
+    v = r;
+
+  kill (self, SIGUSR1);	/* tell test-ptrace to start single-stepping */
+  v = func (v);
+  kill (self, SIGUSR2);	/* tell test-ptrace to stop single-stepping */
+  return v;
+}
+
+int
+main (int argc, char **argv UNUSED)
+{
+  int val = argc;
+
+  signal (SIGUSR1, SIG_IGN);
+  signal (SIGUSR2, SIG_IGN);
+
+  self = getpid ();
+
+  printf ("sum = %d\n", bar (val));
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/tests/test-ptrace.c b/src/third_party/unwind/dist/tests/test-ptrace.c
new file mode 100644
index 00000000000..e7c7883f38f
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/test-ptrace.c
@@ -0,0 +1,370 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <config.h>
+
+#ifdef HAVE_TTRACE
+
+int
+main (void)
+{
+  printf ("FAILURE: ttrace() not supported yet\n");
+  return -1;
+}
+
+#else /* !HAVE_TTRACE */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <libunwind-ptrace.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <sys/ptrace.h>
+#include <sys/wait.h>
+
+extern char **environ;
+
+static const int nerrors_max = 100;
+
+int nerrors;
+int verbose;
+int print_names = 1;
+
+enum
+  {
+    INSTRUCTION,
+    SYSCALL,
+    TRIGGER
+  }
+trace_mode = SYSCALL;
+
+#define panic(args...)						\
+	do { fprintf (stderr, args); ++nerrors; } while (0)
+
+static unw_addr_space_t as;
+static struct UPT_info *ui;
+
+static int killed;
+
+void
+do_backtrace (void)
+{
+  unw_word_t ip, sp, start_ip = 0, off;
+  int n = 0, ret;
+  unw_proc_info_t pi;
+  unw_cursor_t c;
+  char buf[512];
+  size_t len;
+
+  ret = unw_init_remote (&c, as, ui);
+  if (ret < 0)
+    panic ("unw_init_remote() failed: ret=%d\n", ret);
+
+  do
+    {
+      if ((ret = unw_get_reg (&c, UNW_REG_IP, &ip)) < 0
+	  || (ret = unw_get_reg (&c, UNW_REG_SP, &sp)) < 0)
+	panic ("unw_get_reg/unw_get_proc_name() failed: ret=%d\n", ret);
+
+      if (n == 0)
+	start_ip = ip;
+
+      buf[0] = '\0';
+      if (print_names)
+	unw_get_proc_name (&c, buf, sizeof (buf), &off);
+
+      if (verbose)
+	{
+	  if (off)
+	    {
+	      len = strlen (buf);
+	      if (len >= sizeof (buf) - 32)
+		len = sizeof (buf) - 32;
+	      sprintf (buf + len, "+0x%lx", (unsigned long) off);
+	    }
+	  printf ("%016lx %-32s (sp=%016lx)\n", (long) ip, buf, (long) sp);
+	}
+
+      if ((ret = unw_get_proc_info (&c, &pi)) < 0)
+	panic ("unw_get_proc_info(ip=0x%lx) failed: ret=%d\n", (long) ip, ret);
+      else if (verbose)
+	printf ("\tproc=%016lx-%016lx\n\thandler=%lx lsda=%lx",
+		(long) pi.start_ip, (long) pi.end_ip,
+		(long) pi.handler, (long) pi.lsda);
+
+#if UNW_TARGET_IA64
+      {
+	unw_word_t bsp;
+
+	if ((ret = unw_get_reg (&c, UNW_IA64_BSP, &bsp)) < 0)
+	  panic ("unw_get_reg() failed: ret=%d\n", ret);
+	else if (verbose)
+	  printf (" bsp=%lx", bsp);
+      }
+#endif
+      if (verbose)
+	printf ("\n");
+
+      ret = unw_step (&c);
+      if (ret < 0)
+	{
+	  unw_get_reg (&c, UNW_REG_IP, &ip);
+	  panic ("FAILURE: unw_step() returned %d for ip=%lx (start ip=%lx)\n",
+		 ret, (long) ip, (long) start_ip);
+	}
+
+      if (++n > 64)
+	{
+	  /* guard against bad unwind info in old libraries... */
+	  panic ("too deeply nested---assuming bogus unwind (start ip=%lx)\n",
+		 (long) start_ip);
+	  break;
+	}
+      if (nerrors > nerrors_max)
+        {
+	  panic ("Too many errors (%d)!\n", nerrors);
+	  break;
+	}
+    }
+  while (ret > 0);
+
+  if (ret < 0)
+    panic ("unwind failed with ret=%d\n", ret);
+
+  if (verbose)
+    printf ("================\n\n");
+}
+
+static pid_t target_pid;
+static void target_pid_kill (void)
+{
+  kill (target_pid, SIGKILL);
+}
+
+int
+main (int argc, char **argv)
+{
+  int status, pid, pending_sig, optind = 1, state = 1;
+
+  as = unw_create_addr_space (&_UPT_accessors, 0);
+  if (!as)
+    panic ("unw_create_addr_space() failed");
+
+  if (argc == 1)
+    {
+      static char *args[] = { "self", "/bin/ls", "/usr", NULL };
+
+      /* automated test case */
+      argv = args;
+
+      /* Unless the args array is 'walked' the child
+         process is unable to access it and dies with a segfault */
+      fprintf(stderr, "Automated test (%s,%s,%s,%s)\n",
+              args[0],args[1],args[2],args[3]);
+    }
+  else if (argc > 1)
+    while (argv[optind][0] == '-')
+      {
+	if (strcmp (argv[optind], "-v") == 0)
+	  ++optind, verbose = 1;
+	else if (strcmp (argv[optind], "-i") == 0)
+	  ++optind, trace_mode = INSTRUCTION;	/* backtrace at each insn */
+	else if (strcmp (argv[optind], "-s") == 0)
+	  ++optind, trace_mode = SYSCALL;	/* backtrace at each syscall */
+	else if (strcmp (argv[optind], "-t") == 0)
+	  /* Execute until raise(SIGUSR1), then backtrace at each insn
+	     until raise(SIGUSR2).  */
+	  ++optind, trace_mode = TRIGGER;
+	else if (strcmp (argv[optind], "-c") == 0)
+	  /* Enable caching of unwind-info.  */
+	  ++optind, unw_set_caching_policy (as, UNW_CACHE_GLOBAL);
+	else if (strcmp (argv[optind], "-n") == 0)
+	  /* Don't look-up and print symbol names.  */
+	  ++optind, print_names = 0;
+	else
+	  fprintf(stderr, "unrecognized option: %s\n", argv[optind++]);
+        if (optind >= argc)
+          break;
+      }
+
+  target_pid = fork ();
+  if (!target_pid)
+    {
+      /* child */
+
+      if (!verbose)
+	dup2 (open ("/dev/null", O_WRONLY), 1);
+
+#if HAVE_DECL_PTRACE_TRACEME
+      ptrace (PTRACE_TRACEME, 0, 0, 0);
+#elif HAVE_DECL_PT_TRACE_ME
+      ptrace (PT_TRACE_ME, 0, 0, 0);
+#else
+#error Trace me
+#endif
+
+      if ((argc > 1) && (optind == argc)) {
+        fprintf(stderr, "Need to specify a command line for the child\n");
+        exit (-1);
+      }
+      execve (argv[optind], argv + optind, environ);
+      _exit (-1);
+    }
+  atexit (target_pid_kill);
+
+  ui = _UPT_create (target_pid);
+
+  while (nerrors <= nerrors_max)
+    {
+      pid = wait4 (-1, &status, 0, NULL);
+      if (pid == -1)
+	{
+	  if (errno == EINTR)
+	    continue;
+
+	  panic ("wait4() failed (errno=%d)\n", errno);
+	}
+      pending_sig = 0;
+      if (WIFSIGNALED (status) || WIFEXITED (status)
+	  || (WIFSTOPPED (status) && WSTOPSIG (status) != SIGTRAP))
+	{
+	  if (WIFEXITED (status))
+	    {
+	      if (WEXITSTATUS (status) != 0)
+		panic ("child's exit status %d\n", WEXITSTATUS (status));
+	      break;
+	    }
+	  else if (WIFSIGNALED (status))
+	    {
+	      if (!killed)
+		panic ("child terminated by signal %d\n", WTERMSIG (status));
+	      break;
+	    }
+	  else
+	    {
+	      pending_sig = WSTOPSIG (status);
+	      /* Avoid deadlock:  */
+	      if (WSTOPSIG (status) == SIGKILL)
+	        break;
+	      if (trace_mode == TRIGGER)
+		{
+		  if (WSTOPSIG (status) == SIGUSR1)
+		    state = 0;
+		  else if  (WSTOPSIG (status) == SIGUSR2)
+		    state = 1;
+		}
+	      if (WSTOPSIG (status) != SIGUSR1 && WSTOPSIG (status) != SIGUSR2)
+	        {
+		  static int count = 0;
+
+		  if (count++ > 100)
+		    {
+		      panic ("Too many child unexpected signals (now %d)\n",
+			     WSTOPSIG (status));
+			killed = 1;
+		    }
+	        }
+	    }
+	}
+
+      switch (trace_mode)
+	{
+	case TRIGGER:
+	  if (state)
+#if HAVE_DECL_PTRACE_CONT
+	    ptrace (PTRACE_CONT, target_pid, 0, 0);
+#elif HAVE_DECL_PT_CONTINUE
+	    ptrace (PT_CONTINUE, target_pid, (caddr_t)1, 0);
+#else
+#error Port me
+#endif
+	  else
+	    {
+	      do_backtrace ();
+#if HAVE_DECL_PTRACE_SINGLESTEP
+	      if (ptrace (PTRACE_SINGLESTEP, target_pid, 0, pending_sig) < 0)
+          {
+            panic ("ptrace(PTRACE_SINGLESTEP) failed (errno=%d)\n", errno);
+            killed = 1;
+          }
+#elif HAVE_DECL_PT_STEP
+	      if (ptrace (PT_STEP, target_pid, (caddr_t)1, pending_sig) < 0)
+          {
+            panic ("ptrace(PT_STEP) failed (errno=%d)\n", errno);
+            killed = 1;
+          }
+#else
+#error Singlestep me
+#endif
+	    }
+	  break;
+
+	case SYSCALL:
+	  if (!state)
+	    do_backtrace ();
+	  state ^= 1;
+#if HAVE_DECL_PTRACE_SYSCALL
+	  ptrace (PTRACE_SYSCALL, target_pid, 0, pending_sig);
+#elif HAVE_DECL_PT_SYSCALL
+	  ptrace (PT_SYSCALL, target_pid, (caddr_t)1, pending_sig);
+#else
+#error Syscall me
+#endif
+	  break;
+
+	case INSTRUCTION:
+	  do_backtrace ();
+#if HAVE_DECL_PTRACE_SINGLESTEP
+	      ptrace (PTRACE_SINGLESTEP, target_pid, 0, pending_sig);
+#elif HAVE_DECL_PT_STEP
+	      ptrace (PT_STEP, target_pid, (caddr_t)1, pending_sig);
+#else
+#error Singlestep me
+#endif
+	  break;
+	}
+      if (killed)
+        kill (target_pid, SIGKILL);
+    }
+
+  _UPT_destroy (ui);
+  unw_destroy_addr_space (as);
+
+  if (nerrors)
+    {
+      printf ("FAILURE: detected %d errors\n", nerrors);
+      exit (-1);
+    }
+  if (verbose)
+    printf ("SUCCESS\n");
+
+  return 0;
+}
+
+#endif /* !HAVE_TTRACE */
diff --git a/src/third_party/unwind/dist/tests/test-reg-state.c b/src/third_party/unwind/dist/tests/test-reg-state.c
new file mode 100644
index 00000000000..ac713ea68ad
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/test-reg-state.c
@@ -0,0 +1,133 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Copyright (c) 2003 Hewlett-Packard Co.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "compiler.h"
+
+#include <libunwind.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <sys/mman.h>
+#include <sys/resource.h>
+
+#define panic(args...)				\
+	{ fprintf (stderr, args); exit (-1); }
+
+int verbose;
+
+struct cb_data
+{
+  unw_word_t ip;
+  void* reg_state;
+  size_t len;
+};
+
+static int
+dwarf_reg_states_callback(void *token,
+			  void *rs,
+			  size_t size,
+			  unw_word_t start_ip, unw_word_t end_ip)
+{
+  struct cb_data *data = token;
+  if (start_ip <= data->ip && data->ip < end_ip)
+    {
+      data->reg_state = mmap(NULL, size, PROT_READ | PROT_WRITE,
+			     MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+      memcpy(data->reg_state, rs, size);
+      data->len = size;
+    }
+  return 0;
+}
+
+static void
+do_backtrace (void)
+{
+  unw_cursor_t cursor;
+  unw_word_t ip, sp;
+  unw_context_t uc;
+  int ret;
+
+  unw_getcontext (&uc);
+  if (unw_init_local (&cursor, &uc) < 0)
+    panic ("unw_init_local failed!\n");
+
+  do
+    {
+      unw_get_reg (&cursor, UNW_REG_IP, &ip);
+      unw_get_reg (&cursor, UNW_REG_SP, &sp);
+
+      if (verbose)
+	printf ("%016lx (sp=%016lx)\n", (long) ip, (long) sp);
+
+      struct cb_data data = {.ip = ip, .reg_state = NULL};
+      ret = unw_reg_states_iterate(&cursor, dwarf_reg_states_callback, &data);
+      if (ret > 0)
+	{
+	  ret = unw_apply_reg_state (&cursor, data.reg_state);
+	  munmap(data.reg_state, data.len);
+	}
+      if (ret < 0)
+	{
+	  unw_get_reg (&cursor, UNW_REG_IP, &ip);
+	  panic ("FAILURE: unw_step() returned %d for ip=%lx\n",
+		 ret, (long) ip);
+	}
+    }
+  while (ret > 0);
+}
+
+int
+consume_some_stack_space (void)
+{
+  unw_cursor_t cursor;
+  unw_context_t uc;
+  char string[1024];
+
+  memset (&cursor, 0, sizeof (cursor));
+  memset (&uc, 0, sizeof (uc));
+  return sprintf (string, "hello %p %p\n", &cursor, &uc);
+}
+
+int
+main (int argc, char **argv UNUSED)
+{
+  struct rlimit rlim;
+
+  verbose = argc > 1;
+
+  if (consume_some_stack_space () > 9999)
+    exit (-1);	/* can't happen, but don't let the compiler know... */
+
+  rlim.rlim_cur = 0;
+  rlim.rlim_max = RLIM_INFINITY;
+  setrlimit (RLIMIT_DATA, &rlim);
+
+  do_backtrace ();
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/tests/test-setjmp.c b/src/third_party/unwind/dist/tests/test-setjmp.c
new file mode 100644
index 00000000000..769b71b2228
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/test-setjmp.c
@@ -0,0 +1,285 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* The setjmp()/longjmp(), sigsetjmp()/siglongjmp().  */
+
+#include "compiler.h"
+
+#include <setjmp.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+int nerrors;
+int verbose;
+
+static jmp_buf jbuf;
+static sigjmp_buf sigjbuf;
+static sigset_t sigset4;
+
+void
+raise_longjmp (jmp_buf jbuf, int i, int n)
+{
+  while (i < n)
+    raise_longjmp (jbuf, i + 1, n);
+
+  longjmp (jbuf, n);
+}
+
+void
+test_setjmp (void)
+{
+  volatile int i;
+  jmp_buf jbuf;
+  int ret;
+
+  for (i = 0; i < 10; ++i)
+    {
+      if ((ret = setjmp (jbuf)))
+	{
+	  if (verbose)
+	    printf ("%s: secondary setjmp () return, ret=%d\n",
+		    __FUNCTION__, ret);
+	  if (ret != i + 1)
+	    {
+	      fprintf (stderr, "%s: setjmp() returned %d, expected %d\n",
+		       __FUNCTION__, ret, i + 1);
+	      ++nerrors;
+	    }
+	  continue;
+	}
+      if (verbose)
+	printf ("%s.%d: done with setjmp(); calling children\n",
+		__FUNCTION__, i + 1);
+
+      raise_longjmp (jbuf, 0, i + 1);
+
+      fprintf (stderr, "%s: raise_longjmp() returned unexpectedly\n",
+	       __FUNCTION__);
+      ++nerrors;
+    }
+}
+
+
+void
+raise_siglongjmp (sigjmp_buf jbuf, int i, int n)
+{
+  while (i < n)
+    raise_siglongjmp (jbuf, i + 1, n);
+
+  siglongjmp (jbuf, n);
+}
+
+void
+test_sigsetjmp (void)
+{
+  sigjmp_buf jbuf;
+  volatile int i;
+  int ret;
+
+  for (i = 0; i < 10; ++i)
+    {
+      if ((ret = sigsetjmp (jbuf, 1)))
+	{
+	  if (verbose)
+	    printf ("%s: secondary sigsetjmp () return, ret=%d\n",
+		    __FUNCTION__, ret);
+	  if (ret != i + 1)
+	    {
+	      fprintf (stderr, "%s: sigsetjmp() returned %d, expected %d\n",
+		       __FUNCTION__, ret, i + 1);
+	      ++nerrors;
+	    }
+	  continue;
+	}
+      if (verbose)
+	printf ("%s.%d: done with sigsetjmp(); calling children\n",
+		__FUNCTION__, i + 1);
+
+      raise_siglongjmp (jbuf, 0, i + 1);
+
+      fprintf (stderr, "%s: raise_siglongjmp() returned unexpectedly\n",
+	       __FUNCTION__);
+      ++nerrors;
+    }
+}
+
+void
+sighandler (int signal)
+{
+  if (verbose)
+    printf ("%s: got signal %d\n", __FUNCTION__, signal);
+
+  sigprocmask (SIG_BLOCK, NULL, (sigset_t *) &sigset4);
+  if (verbose)
+    printf ("%s: back from sigprocmask\n", __FUNCTION__);
+
+  siglongjmp (sigjbuf, 1);
+  printf ("%s: siglongjmp() returned unexpectedly!\n", __FUNCTION__);
+}
+
+int
+main (int argc, char **argv UNUSED)
+{
+  volatile sigset_t sigset1, sigset2, sigset3;
+  volatile struct sigaction act;
+
+  if (argc > 1)
+    verbose = 1;
+
+  sigemptyset ((sigset_t *) &sigset1);
+  sigaddset ((sigset_t *) &sigset1, SIGUSR1);
+  sigemptyset ((sigset_t *) &sigset2);
+  sigaddset ((sigset_t *) &sigset2, SIGUSR2);
+
+  memset ((void *) &act, 0, sizeof (act));
+  act.sa_handler = sighandler;
+  sigaction (SIGTERM, (struct sigaction *) &act, NULL);
+
+  test_setjmp ();
+  test_sigsetjmp ();
+
+  /* _setjmp() MUST NOT change signal mask: */
+  sigprocmask (SIG_SETMASK, (sigset_t *) &sigset1, NULL);
+  if (_setjmp (jbuf))
+    {
+      sigemptyset ((sigset_t *) &sigset3);
+      sigprocmask (SIG_BLOCK, NULL, (sigset_t *) &sigset3);
+      if (memcmp ((sigset_t *) &sigset3, (sigset_t *) &sigset2,
+		  sizeof (sigset_t)) != 0)
+	{
+	  fprintf (stderr, "FAILURE: _longjmp() manipulated signal mask!\n");
+	  ++nerrors;
+	}
+      else if (verbose)
+	printf ("OK: _longjmp() seems not to change signal mask\n");
+    }
+  else
+    {
+      sigprocmask (SIG_SETMASK, (sigset_t *) &sigset2, NULL);
+      _longjmp (jbuf, 1);
+    }
+
+  /* sigsetjmp(jbuf, 1) MUST preserve signal mask: */
+  sigprocmask (SIG_SETMASK, (sigset_t *) &sigset1, NULL);
+  if (sigsetjmp (sigjbuf, 1))
+    {
+      sigemptyset ((sigset_t *) &sigset3);
+      sigprocmask (SIG_BLOCK, NULL, (sigset_t *) &sigset3);
+      if (memcmp ((sigset_t *) &sigset3, (sigset_t *) &sigset1,
+		  sizeof (sigset_t)) != 0)
+	{
+	  fprintf (stderr,
+		   "FAILURE: siglongjmp() didn't restore signal mask!\n");
+	  ++nerrors;
+	}
+      else if (verbose)
+	printf ("OK: siglongjmp() restores signal mask when asked to\n");
+    }
+  else
+    {
+      sigprocmask (SIG_SETMASK, (sigset_t *) &sigset2, NULL);
+      siglongjmp (sigjbuf, 1);
+    }
+
+  /* sigsetjmp(jbuf, 0) MUST NOT preserve signal mask: */
+  sigprocmask (SIG_SETMASK, (sigset_t *) &sigset1, NULL);
+  if (sigsetjmp (sigjbuf, 0))
+    {
+      sigemptyset ((sigset_t *) &sigset3);
+      sigprocmask (SIG_BLOCK, NULL, (sigset_t *) &sigset3);
+      if (memcmp ((sigset_t *) &sigset3, (sigset_t *) &sigset2,
+		  sizeof (sigset_t)) != 0)
+	{
+	  fprintf (stderr,
+		   "FAILURE: siglongjmp() changed signal mask!\n");
+	  ++nerrors;
+	}
+      else if (verbose)
+	printf ("OK: siglongjmp() leaves signal mask alone when asked to\n");
+    }
+  else
+    {
+      sigprocmask (SIG_SETMASK, (sigset_t *) &sigset2, NULL);
+      siglongjmp (sigjbuf, 1);
+    }
+
+  /* sigsetjmp(jbuf, 1) MUST preserve signal mask: */
+  sigprocmask (SIG_SETMASK, (sigset_t *) &sigset1, NULL);
+  if (sigsetjmp (sigjbuf, 1))
+    {
+      sigemptyset ((sigset_t *) &sigset3);
+      sigprocmask (SIG_BLOCK, NULL, (sigset_t *) &sigset3);
+      if (memcmp ((sigset_t *) &sigset3, (sigset_t *) &sigset1,
+		  sizeof (sigset_t)) != 0)
+	{
+	  fprintf (stderr,
+		   "FAILURE: siglongjmp() didn't restore signal mask!\n");
+	  ++nerrors;
+	}
+      else if (verbose)
+	printf ("OK: siglongjmp() restores signal mask when asked to\n");
+    }
+  else
+    {
+      sigprocmask (SIG_SETMASK, (sigset_t *) &sigset2, NULL);
+      kill (getpid (), SIGTERM);
+      fprintf (stderr, "FAILURE: unexpected return from kill()\n");
+      ++nerrors;
+    }
+
+  /* sigsetjmp(jbuf, 0) MUST NOT preserve signal mask: */
+  sigprocmask (SIG_SETMASK, (sigset_t *) &sigset1, NULL);
+  if (sigsetjmp (sigjbuf, 0))
+    {
+      sigemptyset ((sigset_t *) &sigset3);
+      sigprocmask (SIG_BLOCK, NULL, (sigset_t *) &sigset3);
+      if (memcmp ((sigset_t *) &sigset3, (sigset_t *) &sigset4,
+		  sizeof (sigset_t)) != 0)
+	{
+	  fprintf (stderr,
+		   "FAILURE: siglongjmp() changed signal mask!\n");
+	  ++nerrors;
+	}
+      else if (verbose)
+	printf ("OK: siglongjmp() leaves signal mask alone when asked to\n");
+    }
+  else
+    {
+      sigprocmask (SIG_SETMASK, (sigset_t *) &sigset2, NULL);
+      kill (getpid (), SIGTERM);
+      fprintf (stderr, "FAILURE: unexpected return from kill()\n");
+      ++nerrors;
+    }
+
+  if (nerrors > 0)
+    {
+      fprintf (stderr, "FAILURE: detected %d failures\n", nerrors);
+      exit (-1);
+    }
+  if (verbose)
+    printf ("SUCCESS\n");
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/tests/test-static-link-gen.c b/src/third_party/unwind/dist/tests/test-static-link-gen.c
new file mode 100644
index 00000000000..d61e7a51c66
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/test-static-link-gen.c
@@ -0,0 +1,74 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Copyright (c) 2003 Hewlett-Packard Co.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include <stdio.h>
+
+#include <libunwind.h>
+
+extern int verbose;
+
+static void *funcs[] =
+  {
+    (void *) &unw_get_reg,
+    (void *) &unw_get_fpreg,
+    (void *) &unw_set_reg,
+    (void *) &unw_set_fpreg,
+    (void *) &unw_resume,
+    (void *) &unw_create_addr_space,
+    (void *) &unw_destroy_addr_space,
+    (void *) &unw_get_accessors,
+    (void *) &unw_flush_cache,
+    (void *) &unw_set_caching_policy,
+    (void *) &unw_set_cache_size,
+    (void *) &unw_regname,
+    (void *) &unw_get_proc_info,
+    (void *) &unw_get_save_loc,
+    (void *) &unw_is_signal_frame,
+    (void *) &unw_get_proc_name
+  };
+
+int
+test_generic (void)
+{
+  if (verbose)
+    printf (__FILE__": funcs[0]=%p\n", funcs[0]);
+
+#ifndef UNW_REMOTE_ONLY
+  {
+    unw_context_t uc;
+    unw_cursor_t c;
+
+    unw_getcontext (&uc);
+    unw_init_local (&c, &uc);
+    unw_init_remote (&c, unw_local_addr_space, &uc);
+
+    return unw_step (&c);
+  }
+#else
+  return 0;
+#endif
+}
diff --git a/src/third_party/unwind/dist/tests/test-static-link-loc.c b/src/third_party/unwind/dist/tests/test-static-link-loc.c
new file mode 100644
index 00000000000..1c7aa0378c8
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/test-static-link-loc.c
@@ -0,0 +1,102 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Copyright (c) 2003 Hewlett-Packard Co.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* The purpose of this program is simply to link in all libunwind-API
+   functions both in their local-only and generic variants and to make
+   sure that the final result can be linked statically.  */
+
+#include <stdio.h>
+
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#include "compiler.h"
+
+extern int test_generic (void);
+
+int verbose;
+
+#ifdef UNW_REMOTE_ONLY
+
+int
+test_local (void)
+{
+  return 0;
+}
+
+#else /* !UNW_REMOTE_ONLY */
+
+static void *funcs[] =
+  {
+    (void *) &unw_get_reg,
+    (void *) &unw_get_fpreg,
+    (void *) &unw_set_reg,
+    (void *) &unw_set_fpreg,
+    (void *) &unw_resume,
+    (void *) &unw_create_addr_space,
+    (void *) &unw_destroy_addr_space,
+    (void *) &unw_get_accessors,
+    (void *) &unw_flush_cache,
+    (void *) &unw_set_caching_policy,
+    (void *) &unw_set_cache_size,
+    (void *) &unw_regname,
+    (void *) &unw_get_proc_info,
+    (void *) &unw_get_save_loc,
+    (void *) &unw_is_signal_frame,
+    (void *) &unw_get_proc_name,
+    (void *) &_U_dyn_register,
+    (void *) &_U_dyn_cancel
+  };
+
+int
+test_local (void)
+{
+  unw_context_t uc;
+  unw_cursor_t c;
+
+  if (verbose)
+    printf (__FILE__": funcs[0]=%p\n", funcs[0]);
+
+  unw_getcontext (&uc);
+  unw_init_local (&c, &uc);
+  unw_init_remote (&c, unw_local_addr_space, &uc);
+  return unw_step (&c);
+}
+
+#endif /* !UNW_REMOTE_ONLY */
+
+int
+main (int argc, char **argv UNUSED)
+{
+  if (argc > 1)
+    verbose = 1;
+
+  if (test_local () < 0)
+    return -1;
+  if (test_generic () < 0)
+    return -1;
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/tests/test-strerror.c b/src/third_party/unwind/dist/tests/test-strerror.c
new file mode 100644
index 00000000000..f7ae61ed17b
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/test-strerror.c
@@ -0,0 +1,18 @@
+#include "compiler.h"
+#include <libunwind.h>
+#include <stdio.h>
+
+int
+main (int argc, char **argv UNUSED)
+{
+  int i, verbose = argc > 1;
+  const char *msg;
+
+  for (i = 0; i < 16; ++i)
+    {
+      msg = unw_strerror (-i);
+      if (verbose)
+	printf ("%6d -> %s\n", -i, msg);
+    }
+  return 0;
+}
diff --git a/src/third_party/unwind/dist/tests/x64-test-dwarf-expressions.S b/src/third_party/unwind/dist/tests/x64-test-dwarf-expressions.S
new file mode 100644
index 00000000000..f275625df10
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/x64-test-dwarf-expressions.S
@@ -0,0 +1,78 @@
+.global DW_CFA_expression_testcase
+
+.extern recover_register
+
+.text
+
+# CFI expressions were added in DWARF v3 to allow compilers to specify memory
+# locations or register values using DWARF programs. These programs are simple
+# stack-based operations which allow the compiler to encode integer mathematics
+# and other complex logic. CFI expressions are therefore more powerful than the
+# conventional register + offset schemes.
+#
+# These tests capture a bug we have fixed in libunwind. CFI expression programs
+# always start with the current CFA pushed onto the stack. This file contains a
+# pair of routines which test CFI expression parsing. Specifically they test
+# DW_CFA_expression logic, which uses DWARF expressions to compute the address
+# where a non-volatile register was stored.
+#
+# Main calls DW_CFA_expression_testcase, which sets up known state in a
+# non-volatile (caller-saved) register. We use r12 for this purpose. After this
+# DW_CFA_expression_testcase then calls DW_CFA_expression_inner, which clobbers
+# r12 after stashing its value on the stack. This routine contains a DWARF3 CFI
+# expression to restore the value of r12 on unwind which should allow libunwind
+# to recover clobbered state. DW_CFA_expression_inner calls recover_register to
+# retrieve the cached register value. This function recovers the register value
+# by using libunwind to unwind the stack through DW_CFA_expression_inner and up
+# to the call site in DW_CFA_expression_testcase. If our expression is correct,
+# libunwind will be able to restore r12 from the stack.
+#
+# BE CAREFUL WITH rdi, rsi, rax HERE! The arguments to recover_register are
+# passed in via rdi, rsi and I just let them flow through unchanged. Similarly
+# RAX flows back unchanged. Adding any function calls to the below may clobber
+# these registers and cause this test to fail mysteriously.
+
+
+########################################################
+# Test: Restoring a register using a DW_CFA_expression #
+# which uses implicit CFA pushed onto stack.           #
+########################################################
+
+.type DW_CFA_expression_testcase STT_FUNC
+DW_CFA_expression_testcase:
+  .cfi_startproc
+  push %r12
+  .cfi_adjust_cfa_offset 8
+  # Move our sentinel (known) value into non-volatile (Callee-saved) r12
+  mov $111222333, %r12
+  .cfi_rel_offset %r12, 0
+  call DW_CFA_expression_inner
+  pop %r12
+  .cfi_restore %r12
+  .cfi_adjust_cfa_offset -8
+  ret
+  .cfi_endproc
+.size DW_CFA_expression_testcase,.-DW_CFA_expression_testcase
+
+.type DW_CFA_expression_inner STT_FUNC
+DW_CFA_expression_inner:
+  .cfi_startproc
+  push %r12
+  .cfi_adjust_cfa_offset 8
+  # !! IMPORTANT BIT !! The test is all about how we parse the following bytes.
+  # Now we use an expression to describe where our sentinel value is stored:
+  # DW_CFA_expression(0x10), r12(0x0c), Length(0x02),        (preamble)
+  # DW_OP_lit16(0x40), DW_OP_minus(0x1c)                     (instructions)
+  # Parsing starts with the CFA on the stack, then pushes 16, then does a minus
+  # which is eqivalent to a=pop(), b=pop(), push(b-a), leaving us with a value
+  # of cfa-16 (cfa points at old rsp, cfa-8 is our rip, so we stored r12 at
+  # cfa-16).
+  xor %r12, %r12                             # Trash r12
+  .cfi_escape 0x10, 0x0c, 0x2, 0x40, 0x1c   # DW_CFA_expression for recovery
+  call recover_register
+  pop %r12
+  .cfi_restore %r12
+  .cfi_adjust_cfa_offset -8
+  ret
+  .cfi_endproc
+.size DW_CFA_expression_inner,.-DW_CFA_expression_inner
diff --git a/src/third_party/unwind/platform/linux_x86_64/build/include/config.h b/src/third_party/unwind/platform/linux_x86_64/build/include/config.h
new file mode 100644
index 00000000000..d8f0eb77411
--- /dev/null
+++ b/src/third_party/unwind/platform/linux_x86_64/build/include/config.h
@@ -0,0 +1,235 @@
+/* include/config.h.  Generated from config.h.in by configure.  */
+/* include/config.h.in.  Generated from configure.ac by autoheader.  */
+
+/* Block signals before mutex operations */
+#define CONFIG_BLOCK_SIGNALS /**/
+
+/* Enable Debug Frame */
+/* #undef CONFIG_DEBUG_FRAME */
+
+/* Support for Microsoft ABI extensions */
+/* #undef CONFIG_MSABI_SUPPORT */
+
+/* Define to 1 if you want every memory access validated */
+#define CONSERVATIVE_CHECKS 1
+
+/* Define to 1 if you have the <asm/ptrace_offsets.h> header file. */
+/* #undef HAVE_ASM_PTRACE_OFFSETS_H */
+
+/* Define to 1 if you have the <atomic_ops.h> header file. */
+/* #undef HAVE_ATOMIC_OPS_H */
+
+/* Define to 1 if you have the <byteswap.h> header file. */
+#define HAVE_BYTESWAP_H 1
+
+/* Define to 1 if you have the declaration of `PTRACE_CONT', and to 0 if you
+   don't. */
+#define HAVE_DECL_PTRACE_CONT 1
+
+/* Define to 1 if you have the declaration of `PTRACE_POKEDATA', and to 0 if
+   you don't. */
+#define HAVE_DECL_PTRACE_POKEDATA 1
+
+/* Define to 1 if you have the declaration of `PTRACE_POKEUSER', and to 0 if
+   you don't. */
+#define HAVE_DECL_PTRACE_POKEUSER 1
+
+/* Define to 1 if you have the declaration of `PTRACE_SETREGSET', and to 0 if
+   you don't. */
+#define HAVE_DECL_PTRACE_SETREGSET 1
+
+/* Define to 1 if you have the declaration of `PTRACE_SINGLESTEP', and to 0 if
+   you don't. */
+#define HAVE_DECL_PTRACE_SINGLESTEP 1
+
+/* Define to 1 if you have the declaration of `PTRACE_SYSCALL', and to 0 if
+   you don't. */
+#define HAVE_DECL_PTRACE_SYSCALL 1
+
+/* Define to 1 if you have the declaration of `PTRACE_TRACEME', and to 0 if
+   you don't. */
+#define HAVE_DECL_PTRACE_TRACEME 1
+
+/* Define to 1 if you have the declaration of `PT_CONTINUE', and to 0 if you
+   don't. */
+#define HAVE_DECL_PT_CONTINUE 1
+
+/* Define to 1 if you have the declaration of `PT_GETFPREGS', and to 0 if you
+   don't. */
+#define HAVE_DECL_PT_GETFPREGS 1
+
+/* Define to 1 if you have the declaration of `PT_GETREGS', and to 0 if you
+   don't. */
+#define HAVE_DECL_PT_GETREGS 1
+
+/* Define to 1 if you have the declaration of `PT_IO', and to 0 if you don't.
+   */
+#define HAVE_DECL_PT_IO 0
+
+/* Define to 1 if you have the declaration of `PT_STEP', and to 0 if you
+   don't. */
+#define HAVE_DECL_PT_STEP 1
+
+/* Define to 1 if you have the declaration of `PT_SYSCALL', and to 0 if you
+   don't. */
+#define HAVE_DECL_PT_SYSCALL 1
+
+/* Define to 1 if you have the declaration of `PT_TRACE_ME', and to 0 if you
+   don't. */
+#define HAVE_DECL_PT_TRACE_ME 1
+
+/* Define to 1 if you have the <dlfcn.h> header file. */
+#define HAVE_DLFCN_H 1
+
+/* Define to 1 if you have the `dlmodinfo' function. */
+/* #undef HAVE_DLMODINFO */
+
+/* Define to 1 if you have the `dl_iterate_phdr' function. */
+#define HAVE_DL_ITERATE_PHDR 1
+
+/* Define to 1 if you have the `dl_phdr_removals_counter' function. */
+/* #undef HAVE_DL_PHDR_REMOVALS_COUNTER */
+
+/* Define to 1 if you have the <elf.h> header file. */
+#define HAVE_ELF_H 1
+
+/* Define to 1 if you have the <endian.h> header file. */
+#define HAVE_ENDIAN_H 1
+
+/* Define to 1 if you have the <execinfo.h> header file. */
+#define HAVE_EXECINFO_H 1
+
+/* Define to 1 if you have the `getunwind' function. */
+/* #undef HAVE_GETUNWIND */
+
+/* Define to 1 if you have the <ia64intrin.h> header file. */
+/* #undef HAVE_IA64INTRIN_H */
+
+/* Define to 1 if you have the <inttypes.h> header file. */
+#define HAVE_INTTYPES_H 1
+
+/* Define to 1 if you have the `uca' library (-luca). */
+/* #undef HAVE_LIBUCA */
+
+/* Define to 1 if you have the <link.h> header file. */
+#define HAVE_LINK_H 1
+
+/* Define if you have liblzma */
+/* #undef HAVE_LZMA */
+
+/* Define to 1 if you have the <memory.h> header file. */
+#define HAVE_MEMORY_H 1
+
+/* Define to 1 if you have the `mincore' function. */
+#define HAVE_MINCORE 1
+
+/* Define to 1 if you have the <signal.h> header file. */
+#define HAVE_SIGNAL_H 1
+
+/* Define to 1 if you have the <stdint.h> header file. */
+#define HAVE_STDINT_H 1
+
+/* Define to 1 if you have the <stdlib.h> header file. */
+#define HAVE_STDLIB_H 1
+
+/* Define to 1 if you have the <strings.h> header file. */
+#define HAVE_STRINGS_H 1
+
+/* Define to 1 if you have the <string.h> header file. */
+#define HAVE_STRING_H 1
+
+/* Define to 1 if `dlpi_subs' is a member of `struct dl_phdr_info'. */
+#define HAVE_STRUCT_DL_PHDR_INFO_DLPI_SUBS 1
+
+/* Define to 1 if the system has the type `struct elf_prstatus'. */
+#define HAVE_STRUCT_ELF_PRSTATUS 1
+
+/* Define to 1 if the system has the type `struct prstatus'. */
+/* #undef HAVE_STRUCT_PRSTATUS */
+
+/* Defined if __sync atomics are available */
+#define HAVE_SYNC_ATOMICS 1
+
+/* Define to 1 if you have the <sys/elf.h> header file. */
+/* #undef HAVE_SYS_ELF_H */
+
+/* Define to 1 if you have the <sys/endian.h> header file. */
+/* #undef HAVE_SYS_ENDIAN_H */
+
+/* Define to 1 if you have the <sys/link.h> header file. */
+/* #undef HAVE_SYS_LINK_H */
+
+/* Define to 1 if you have the <sys/procfs.h> header file. */
+#define HAVE_SYS_PROCFS_H 1
+
+/* Define to 1 if you have the <sys/ptrace.h> header file. */
+#define HAVE_SYS_PTRACE_H 1
+
+/* Define to 1 if you have the <sys/stat.h> header file. */
+#define HAVE_SYS_STAT_H 1
+
+/* Define to 1 if you have the <sys/types.h> header file. */
+#define HAVE_SYS_TYPES_H 1
+
+/* Define to 1 if you have the <sys/uc_access.h> header file. */
+/* #undef HAVE_SYS_UC_ACCESS_H */
+
+/* Define to 1 if you have the `ttrace' function. */
+/* #undef HAVE_TTRACE */
+
+/* Define to 1 if you have the <unistd.h> header file. */
+#define HAVE_UNISTD_H 1
+
+/* Defined if __builtin_unreachable() is available */
+#define HAVE__BUILTIN_UNREACHABLE 1
+
+/* Defined if __builtin___clear_cache() is available */
+#define HAVE__BUILTIN___CLEAR_CACHE 1
+
+/* Define to 1 if __thread keyword is supported by the C compiler. */
+/* #undef HAVE___THREAD */
+
+/* Define to the sub-directory where libtool stores uninstalled libraries. */
+#define LT_OBJDIR ".libs/"
+
+/* Name of package */
+#define PACKAGE "libunwind"
+
+/* Define to the address where bug reports for this package should be sent. */
+#define PACKAGE_BUGREPORT "libunwind-devel@nongnu.org"
+
+/* Define to the full name of this package. */
+#define PACKAGE_NAME "libunwind"
+
+/* Define to the full name and version of this package. */
+#define PACKAGE_STRING "libunwind 1.4-rc1"
+
+/* Define to the one symbol short name of this package. */
+#define PACKAGE_TARNAME "libunwind"
+
+/* Define to the home page for this package. */
+#define PACKAGE_URL ""
+
+/* Define to the version of this package. */
+#define PACKAGE_VERSION "1.4-rc1"
+
+/* The size of `off_t', as computed by sizeof. */
+#define SIZEOF_OFF_T 8
+
+/* Define to 1 if you have the ANSI C header files. */
+#define STDC_HEADERS 1
+
+/* Version number of package */
+#define VERSION "1.4-rc1"
+
+/* Define to empty if `const' does not conform to ANSI C. */
+/* #undef const */
+
+/* Define to `__inline__' or `__inline' if that's what the C compiler
+   calls it, or to nothing if 'inline' is not supported under any name.  */
+#ifndef __cplusplus
+/* #undef inline */
+#endif
+
+/* Define to `unsigned int' if <sys/types.h> does not define. */
+/* #undef size_t */
diff --git a/src/third_party/unwind/platform/linux_x86_64/build/include/libunwind-common.h b/src/third_party/unwind/platform/linux_x86_64/build/include/libunwind-common.h
new file mode 100644
index 00000000000..37b0ef4a5db
--- /dev/null
+++ b/src/third_party/unwind/platform/linux_x86_64/build/include/libunwind-common.h
@@ -0,0 +1,279 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#define UNW_VERSION_MAJOR	1
+#define UNW_VERSION_MINOR	4
+#define UNW_VERSION_EXTRA	-rc1
+
+#define UNW_VERSION_CODE(maj,min)	(((maj) << 16) | (min))
+#define UNW_VERSION	UNW_VERSION_CODE(UNW_VERSION_MAJOR, UNW_VERSION_MINOR)
+
+#define UNW_PASTE2(x,y)	x##y
+#define UNW_PASTE(x,y)	UNW_PASTE2(x,y)
+#define UNW_OBJ(fn)	UNW_PASTE(UNW_PREFIX, fn)
+#define UNW_ARCH_OBJ(fn) UNW_PASTE(UNW_PASTE(UNW_PASTE(_U,UNW_TARGET),_), fn)
+
+#ifdef UNW_LOCAL_ONLY
+# define UNW_PREFIX	UNW_PASTE(UNW_PASTE(_UL,UNW_TARGET),_)
+#else /* !UNW_LOCAL_ONLY */
+# define UNW_PREFIX	UNW_PASTE(UNW_PASTE(_U,UNW_TARGET),_)
+#endif /* !UNW_LOCAL_ONLY */
+
+/* Error codes.  The unwind routines return the *negated* values of
+   these error codes on error and a non-negative value on success.  */
+typedef enum
+  {
+    UNW_ESUCCESS = 0,		/* no error */
+    UNW_EUNSPEC,		/* unspecified (general) error */
+    UNW_ENOMEM,			/* out of memory */
+    UNW_EBADREG,		/* bad register number */
+    UNW_EREADONLYREG,		/* attempt to write read-only register */
+    UNW_ESTOPUNWIND,		/* stop unwinding */
+    UNW_EINVALIDIP,		/* invalid IP */
+    UNW_EBADFRAME,		/* bad frame */
+    UNW_EINVAL,			/* unsupported operation or bad value */
+    UNW_EBADVERSION,		/* unwind info has unsupported version */
+    UNW_ENOINFO			/* no unwind info found */
+  }
+unw_error_t;
+
+/* The following enum defines the indices for a couple of
+   (pseudo-)registers which have the same meaning across all
+   platforms.  (RO) means read-only.  (RW) means read-write.  General
+   registers (aka "integer registers") are expected to start with
+   index 0.  The number of such registers is architecture-dependent.
+   The remaining indices can be used as an architecture sees fit.  The
+   last valid register index is given by UNW_REG_LAST.  */
+typedef enum
+  {
+    UNW_REG_IP = UNW_TDEP_IP,		/* (rw) instruction pointer (pc) */
+    UNW_REG_SP = UNW_TDEP_SP,		/* (ro) stack pointer */
+    UNW_REG_EH = UNW_TDEP_EH,		/* (rw) exception-handling reg base */
+    UNW_REG_LAST = UNW_TDEP_LAST_REG
+  }
+unw_frame_regnum_t;
+
+/* Number of exception-handler argument registers: */
+#define UNW_NUM_EH_REGS		UNW_TDEP_NUM_EH_REGS
+
+typedef enum
+  {
+    UNW_CACHE_NONE,			/* no caching */
+    UNW_CACHE_GLOBAL,			/* shared global cache */
+    UNW_CACHE_PER_THREAD		/* per-thread caching */
+  }
+unw_caching_policy_t;
+
+typedef enum
+  {
+    UNW_INIT_SIGNAL_FRAME = 1,          /* We know this is a signal frame */
+  }
+unw_init_local2_flags_t;
+
+typedef int unw_regnum_t;
+
+/* The unwind cursor starts at the youngest (most deeply nested) frame
+   and is used to track the frame state as the unwinder steps from
+   frame to frame.  It is safe to make (shallow) copies of variables
+   of this type.  */
+typedef struct unw_cursor
+  {
+    unw_word_t opaque[UNW_TDEP_CURSOR_LEN];
+  }
+unw_cursor_t;
+
+/* This type encapsulates the entire (preserved) machine-state.  */
+typedef unw_tdep_context_t unw_context_t;
+
+/* unw_getcontext() fills the unw_context_t pointed to by UC with the
+   machine state as it exists at the call-site.  For implementation
+   reasons, this needs to be a target-dependent macro.  It's easiest
+   to think of unw_getcontext() as being identical to getcontext(). */
+#define unw_getcontext(uc)		unw_tdep_getcontext(uc)
+
+/* Return 1 if register number R is a floating-point register, zero
+   otherwise.
+   This routine is signal-safe.  */
+#define unw_is_fpreg(r)			unw_tdep_is_fpreg(r)
+
+typedef unw_tdep_fpreg_t unw_fpreg_t;
+
+typedef struct unw_addr_space *unw_addr_space_t;
+
+/* Each target may define it's own set of flags, but bits 0-15 are
+   reserved for general libunwind-use.  */
+#define UNW_PI_FLAG_FIRST_TDEP_BIT	16
+/* The information comes from a .debug_frame section.  */
+#define UNW_PI_FLAG_DEBUG_FRAME	32
+
+typedef struct unw_proc_info
+  {
+    unw_word_t start_ip;	/* first IP covered by this procedure */
+    unw_word_t end_ip;		/* first IP NOT covered by this procedure */
+#if defined(NEED_LAST_IP)
+    unw_word_t last_ip;		/* first IP that could begin another procedure */
+#endif
+    unw_word_t lsda;		/* address of lang.-spec. data area (if any) */
+    unw_word_t handler;		/* optional personality routine */
+    unw_word_t gp;		/* global-pointer value for this procedure */
+    unw_word_t flags;		/* misc. flags */
+
+    int format;			/* unwind-info format (arch-specific) */
+    int unwind_info_size;	/* size of the information (if applicable) */
+    void *unwind_info;		/* unwind-info (arch-specific) */
+    unw_tdep_proc_info_t extra;	/* target-dependent auxiliary proc-info */
+  }
+unw_proc_info_t;
+
+typedef int (*unw_reg_states_callback)(void *token,
+				       void *reg_states_data,
+				       size_t reg_states_data_size,
+				       unw_word_t start_ip, unw_word_t end_ip);
+
+/* These are backend callback routines that provide access to the
+   state of a "remote" process.  This can be used, for example, to
+   unwind another process through the ptrace() interface.  */
+typedef struct unw_accessors
+  {
+    /* Look up the unwind info associated with instruction-pointer IP.
+       On success, the routine fills in the PROC_INFO structure.  */
+    int (*find_proc_info) (unw_addr_space_t, unw_word_t, unw_proc_info_t *,
+			   int, void *);
+
+    /* Release any resources (e.g., memory) that were allocated for
+       the unwind info returned in by a previous call to
+       find_proc_info() with NEED_UNWIND_INFO set to 1.  */
+    void (*put_unwind_info) (unw_addr_space_t, unw_proc_info_t *, void *);
+
+    /* Return the list-head of the dynamically registered unwind
+       info.  */
+    int (*get_dyn_info_list_addr) (unw_addr_space_t, unw_word_t *, void *);
+
+    /* Access aligned word at address ADDR.  The value is returned
+       according to the endianness of the host (e.g., if the host is
+       little-endian and the target is big-endian, access_mem() needs
+       to byte-swap the value before returning it).  */
+    int (*access_mem) (unw_addr_space_t, unw_word_t, unw_word_t *, int,
+		       void *);
+
+    /* Access register number REG at address ADDR.  */
+    int (*access_reg) (unw_addr_space_t, unw_regnum_t, unw_word_t *, int,
+		       void *);
+
+    /* Access register number REG at address ADDR.  */
+    int (*access_fpreg) (unw_addr_space_t, unw_regnum_t,
+			 unw_fpreg_t *, int, void *);
+
+    int (*resume) (unw_addr_space_t, unw_cursor_t *, void *);
+
+    /* Optional call back to obtain the name of a (static) procedure.
+       Dynamically generated procedures are handled automatically by
+       libunwind.  This callback is optional and may be set to
+       NULL.  */
+    int (*get_proc_name) (unw_addr_space_t, unw_word_t, char *, size_t,
+			  unw_word_t *, void *);
+  }
+unw_accessors_t;
+
+typedef enum unw_save_loc_type
+  {
+    UNW_SLT_NONE,	/* register is not saved ("not an l-value") */
+    UNW_SLT_MEMORY,	/* register has been saved in memory */
+    UNW_SLT_REG		/* register has been saved in (another) register */
+  }
+unw_save_loc_type_t;
+
+typedef struct unw_save_loc
+  {
+    unw_save_loc_type_t type;
+    union
+      {
+	unw_word_t addr;	/* valid if type==UNW_SLT_MEMORY */
+	unw_regnum_t regnum;	/* valid if type==UNW_SLT_REG */
+      }
+    u;
+    unw_tdep_save_loc_t extra;	/* target-dependent additional information */
+  }
+unw_save_loc_t;
+
+/* These routines work both for local and remote unwinding.  */
+
+#define unw_local_addr_space	UNW_OBJ(local_addr_space)
+#define unw_create_addr_space	UNW_OBJ(create_addr_space)
+#define unw_destroy_addr_space	UNW_OBJ(destroy_addr_space)
+#define unw_get_accessors	UNW_ARCH_OBJ(get_accessors)
+#define unw_get_accessors_int	UNW_ARCH_OBJ(get_accessors_int)
+#define unw_init_local		UNW_OBJ(init_local)
+#define unw_init_local2	        UNW_OBJ(init_local2)
+#define unw_init_remote		UNW_OBJ(init_remote)
+#define unw_step		UNW_OBJ(step)
+#define unw_resume		UNW_OBJ(resume)
+#define unw_get_proc_info	UNW_OBJ(get_proc_info)
+#define unw_get_proc_info_by_ip	UNW_OBJ(get_proc_info_by_ip)
+#define unw_reg_states_iterate  UNW_OBJ(reg_states_iterate)
+#define unw_apply_reg_state     UNW_OBJ(apply_reg_state)
+#define unw_get_reg		UNW_OBJ(get_reg)
+#define unw_set_reg		UNW_OBJ(set_reg)
+#define unw_get_fpreg		UNW_OBJ(get_fpreg)
+#define unw_set_fpreg		UNW_OBJ(set_fpreg)
+#define unw_get_save_loc	UNW_OBJ(get_save_loc)
+#define unw_is_signal_frame	UNW_OBJ(is_signal_frame)
+#define unw_get_proc_name	UNW_OBJ(get_proc_name)
+#define unw_set_caching_policy	UNW_OBJ(set_caching_policy)
+#define unw_set_cache_size	UNW_OBJ(set_cache_size)
+#define unw_regname		UNW_ARCH_OBJ(regname)
+#define unw_flush_cache		UNW_ARCH_OBJ(flush_cache)
+#define unw_strerror		UNW_ARCH_OBJ(strerror)
+
+extern unw_addr_space_t unw_create_addr_space (unw_accessors_t *, int);
+extern void unw_destroy_addr_space (unw_addr_space_t);
+extern unw_accessors_t *unw_get_accessors (unw_addr_space_t);
+extern unw_accessors_t *unw_get_accessors_int (unw_addr_space_t);
+extern void unw_flush_cache (unw_addr_space_t, unw_word_t, unw_word_t);
+extern int unw_set_caching_policy (unw_addr_space_t, unw_caching_policy_t);
+extern int unw_set_cache_size (unw_addr_space_t, size_t, int);
+extern const char *unw_regname (unw_regnum_t);
+
+extern int unw_init_local (unw_cursor_t *, unw_context_t *);
+extern int unw_init_local2 (unw_cursor_t *, unw_context_t *, int);
+extern int unw_init_remote (unw_cursor_t *, unw_addr_space_t, void *);
+extern int unw_step (unw_cursor_t *);
+extern int unw_resume (unw_cursor_t *);
+extern int unw_get_proc_info (unw_cursor_t *, unw_proc_info_t *);
+extern int unw_get_proc_info_by_ip (unw_addr_space_t, unw_word_t,
+				    unw_proc_info_t *, void *);
+extern int unw_reg_states_iterate (unw_cursor_t *, unw_reg_states_callback, void *);
+extern int unw_apply_reg_state (unw_cursor_t *, void *);
+extern int unw_get_reg (unw_cursor_t *, int, unw_word_t *);
+extern int unw_set_reg (unw_cursor_t *, int, unw_word_t);
+extern int unw_get_fpreg (unw_cursor_t *, int, unw_fpreg_t *);
+extern int unw_set_fpreg (unw_cursor_t *, int, unw_fpreg_t);
+extern int unw_get_save_loc (unw_cursor_t *, int, unw_save_loc_t *);
+extern int unw_is_signal_frame (unw_cursor_t *);
+extern int unw_get_proc_name (unw_cursor_t *, char *, size_t, unw_word_t *);
+extern const char *unw_strerror (int);
+extern int unw_backtrace (void **, int);
+
+extern unw_addr_space_t unw_local_addr_space;
diff --git a/src/third_party/unwind/platform/linux_x86_64/build/include/libunwind.h b/src/third_party/unwind/platform/linux_x86_64/build/include/libunwind.h
new file mode 100644
index 00000000000..91bb8ef9cad
--- /dev/null
+++ b/src/third_party/unwind/platform/linux_x86_64/build/include/libunwind.h
@@ -0,0 +1,38 @@
+/* Provide a real file - not a symlink - as it would cause multiarch conflicts
+   when multiple different arch releases are installed simultaneously.  */
+
+#ifndef UNW_REMOTE_ONLY
+
+#if defined __aarch64__
+#include "libunwind-aarch64.h"
+#elif defined __arm__
+# include "libunwind-arm.h"
+#elif defined __hppa__
+# include "libunwind-hppa.h"
+#elif defined __ia64__
+# include "libunwind-ia64.h"
+#elif defined __mips__
+# include "libunwind-mips.h"
+#elif defined __powerpc__ && !defined __powerpc64__
+# include "libunwind-ppc32.h"
+#elif defined __powerpc64__
+# include "libunwind-ppc64.h"
+#elif defined __sh__
+# include "libunwind-sh.h"
+#elif defined __i386__
+# include "libunwind-x86.h"
+#elif defined __x86_64__
+# include "libunwind-x86_64.h"
+#elif defined __tilegx__
+# include "libunwind-tilegx.h"
+#elif defined __s390x__
+# include "libunwind-s390x.h"
+#else
+# error "Unsupported arch"
+#endif
+
+#else /* UNW_REMOTE_ONLY */
+
+# include "libunwind-x86_64.h"
+
+#endif /* UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/platform/linux_x86_64/build/include/tdep/libunwind_i.h b/src/third_party/unwind/platform/linux_x86_64/build/include/tdep/libunwind_i.h
new file mode 100644
index 00000000000..19cdc156c6f
--- /dev/null
+++ b/src/third_party/unwind/platform/linux_x86_64/build/include/tdep/libunwind_i.h
@@ -0,0 +1,39 @@
+/* Provide a real file - not a symlink - as it would cause multiarch conflicts
+   when multiple different arch releases are installed simultaneously.  */
+
+#ifndef UNW_REMOTE_ONLY
+
+#if defined __aarch64__
+# include "tdep-aarch64/libunwind_i.h"
+#elif defined __arm__
+# include "tdep-arm/libunwind_i.h"
+#elif defined __hppa__
+# include "tdep-hppa/libunwind_i.h"
+#elif defined __ia64__
+# include "tdep-ia64/libunwind_i.h"
+#elif defined __mips__
+# include "tdep-mips/libunwind_i.h"
+#elif defined __powerpc__ && !defined __powerpc64__
+# include "tdep-ppc32/libunwind_i.h"
+#elif defined __powerpc64__
+# include "tdep-ppc64/libunwind_i.h"
+#elif defined __sh__
+# include "tdep-sh/libunwind_i.h"
+#elif defined __i386__
+# include "tdep-x86/libunwind_i.h"
+#elif defined __x86_64__
+# include "tdep-x86_64/libunwind_i.h"
+#elif defined __tilegx__
+# include "tdep-tilegx/libunwind_i.h"
+#elif defined __s390x__
+# include "tdep-s390x/libunwind_i.h"
+#else
+# error "Unsupported arch"
+#endif
+
+
+#else /* UNW_REMOTE_ONLY */
+
+# include "tdep-x86_64/libunwind_i.h"
+
+#endif /* UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/platform/linux_x86_64/install/include/libunwind-common.h b/src/third_party/unwind/platform/linux_x86_64/install/include/libunwind-common.h
new file mode 100644
index 00000000000..37b0ef4a5db
--- /dev/null
+++ b/src/third_party/unwind/platform/linux_x86_64/install/include/libunwind-common.h
@@ -0,0 +1,279 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#define UNW_VERSION_MAJOR	1
+#define UNW_VERSION_MINOR	4
+#define UNW_VERSION_EXTRA	-rc1
+
+#define UNW_VERSION_CODE(maj,min)	(((maj) << 16) | (min))
+#define UNW_VERSION	UNW_VERSION_CODE(UNW_VERSION_MAJOR, UNW_VERSION_MINOR)
+
+#define UNW_PASTE2(x,y)	x##y
+#define UNW_PASTE(x,y)	UNW_PASTE2(x,y)
+#define UNW_OBJ(fn)	UNW_PASTE(UNW_PREFIX, fn)
+#define UNW_ARCH_OBJ(fn) UNW_PASTE(UNW_PASTE(UNW_PASTE(_U,UNW_TARGET),_), fn)
+
+#ifdef UNW_LOCAL_ONLY
+# define UNW_PREFIX	UNW_PASTE(UNW_PASTE(_UL,UNW_TARGET),_)
+#else /* !UNW_LOCAL_ONLY */
+# define UNW_PREFIX	UNW_PASTE(UNW_PASTE(_U,UNW_TARGET),_)
+#endif /* !UNW_LOCAL_ONLY */
+
+/* Error codes.  The unwind routines return the *negated* values of
+   these error codes on error and a non-negative value on success.  */
+typedef enum
+  {
+    UNW_ESUCCESS = 0,		/* no error */
+    UNW_EUNSPEC,		/* unspecified (general) error */
+    UNW_ENOMEM,			/* out of memory */
+    UNW_EBADREG,		/* bad register number */
+    UNW_EREADONLYREG,		/* attempt to write read-only register */
+    UNW_ESTOPUNWIND,		/* stop unwinding */
+    UNW_EINVALIDIP,		/* invalid IP */
+    UNW_EBADFRAME,		/* bad frame */
+    UNW_EINVAL,			/* unsupported operation or bad value */
+    UNW_EBADVERSION,		/* unwind info has unsupported version */
+    UNW_ENOINFO			/* no unwind info found */
+  }
+unw_error_t;
+
+/* The following enum defines the indices for a couple of
+   (pseudo-)registers which have the same meaning across all
+   platforms.  (RO) means read-only.  (RW) means read-write.  General
+   registers (aka "integer registers") are expected to start with
+   index 0.  The number of such registers is architecture-dependent.
+   The remaining indices can be used as an architecture sees fit.  The
+   last valid register index is given by UNW_REG_LAST.  */
+typedef enum
+  {
+    UNW_REG_IP = UNW_TDEP_IP,		/* (rw) instruction pointer (pc) */
+    UNW_REG_SP = UNW_TDEP_SP,		/* (ro) stack pointer */
+    UNW_REG_EH = UNW_TDEP_EH,		/* (rw) exception-handling reg base */
+    UNW_REG_LAST = UNW_TDEP_LAST_REG
+  }
+unw_frame_regnum_t;
+
+/* Number of exception-handler argument registers: */
+#define UNW_NUM_EH_REGS		UNW_TDEP_NUM_EH_REGS
+
+typedef enum
+  {
+    UNW_CACHE_NONE,			/* no caching */
+    UNW_CACHE_GLOBAL,			/* shared global cache */
+    UNW_CACHE_PER_THREAD		/* per-thread caching */
+  }
+unw_caching_policy_t;
+
+typedef enum
+  {
+    UNW_INIT_SIGNAL_FRAME = 1,          /* We know this is a signal frame */
+  }
+unw_init_local2_flags_t;
+
+typedef int unw_regnum_t;
+
+/* The unwind cursor starts at the youngest (most deeply nested) frame
+   and is used to track the frame state as the unwinder steps from
+   frame to frame.  It is safe to make (shallow) copies of variables
+   of this type.  */
+typedef struct unw_cursor
+  {
+    unw_word_t opaque[UNW_TDEP_CURSOR_LEN];
+  }
+unw_cursor_t;
+
+/* This type encapsulates the entire (preserved) machine-state.  */
+typedef unw_tdep_context_t unw_context_t;
+
+/* unw_getcontext() fills the unw_context_t pointed to by UC with the
+   machine state as it exists at the call-site.  For implementation
+   reasons, this needs to be a target-dependent macro.  It's easiest
+   to think of unw_getcontext() as being identical to getcontext(). */
+#define unw_getcontext(uc)		unw_tdep_getcontext(uc)
+
+/* Return 1 if register number R is a floating-point register, zero
+   otherwise.
+   This routine is signal-safe.  */
+#define unw_is_fpreg(r)			unw_tdep_is_fpreg(r)
+
+typedef unw_tdep_fpreg_t unw_fpreg_t;
+
+typedef struct unw_addr_space *unw_addr_space_t;
+
+/* Each target may define it's own set of flags, but bits 0-15 are
+   reserved for general libunwind-use.  */
+#define UNW_PI_FLAG_FIRST_TDEP_BIT	16
+/* The information comes from a .debug_frame section.  */
+#define UNW_PI_FLAG_DEBUG_FRAME	32
+
+typedef struct unw_proc_info
+  {
+    unw_word_t start_ip;	/* first IP covered by this procedure */
+    unw_word_t end_ip;		/* first IP NOT covered by this procedure */
+#if defined(NEED_LAST_IP)
+    unw_word_t last_ip;		/* first IP that could begin another procedure */
+#endif
+    unw_word_t lsda;		/* address of lang.-spec. data area (if any) */
+    unw_word_t handler;		/* optional personality routine */
+    unw_word_t gp;		/* global-pointer value for this procedure */
+    unw_word_t flags;		/* misc. flags */
+
+    int format;			/* unwind-info format (arch-specific) */
+    int unwind_info_size;	/* size of the information (if applicable) */
+    void *unwind_info;		/* unwind-info (arch-specific) */
+    unw_tdep_proc_info_t extra;	/* target-dependent auxiliary proc-info */
+  }
+unw_proc_info_t;
+
+typedef int (*unw_reg_states_callback)(void *token,
+				       void *reg_states_data,
+				       size_t reg_states_data_size,
+				       unw_word_t start_ip, unw_word_t end_ip);
+
+/* These are backend callback routines that provide access to the
+   state of a "remote" process.  This can be used, for example, to
+   unwind another process through the ptrace() interface.  */
+typedef struct unw_accessors
+  {
+    /* Look up the unwind info associated with instruction-pointer IP.
+       On success, the routine fills in the PROC_INFO structure.  */
+    int (*find_proc_info) (unw_addr_space_t, unw_word_t, unw_proc_info_t *,
+			   int, void *);
+
+    /* Release any resources (e.g., memory) that were allocated for
+       the unwind info returned in by a previous call to
+       find_proc_info() with NEED_UNWIND_INFO set to 1.  */
+    void (*put_unwind_info) (unw_addr_space_t, unw_proc_info_t *, void *);
+
+    /* Return the list-head of the dynamically registered unwind
+       info.  */
+    int (*get_dyn_info_list_addr) (unw_addr_space_t, unw_word_t *, void *);
+
+    /* Access aligned word at address ADDR.  The value is returned
+       according to the endianness of the host (e.g., if the host is
+       little-endian and the target is big-endian, access_mem() needs
+       to byte-swap the value before returning it).  */
+    int (*access_mem) (unw_addr_space_t, unw_word_t, unw_word_t *, int,
+		       void *);
+
+    /* Access register number REG at address ADDR.  */
+    int (*access_reg) (unw_addr_space_t, unw_regnum_t, unw_word_t *, int,
+		       void *);
+
+    /* Access register number REG at address ADDR.  */
+    int (*access_fpreg) (unw_addr_space_t, unw_regnum_t,
+			 unw_fpreg_t *, int, void *);
+
+    int (*resume) (unw_addr_space_t, unw_cursor_t *, void *);
+
+    /* Optional call back to obtain the name of a (static) procedure.
+       Dynamically generated procedures are handled automatically by
+       libunwind.  This callback is optional and may be set to
+       NULL.  */
+    int (*get_proc_name) (unw_addr_space_t, unw_word_t, char *, size_t,
+			  unw_word_t *, void *);
+  }
+unw_accessors_t;
+
+typedef enum unw_save_loc_type
+  {
+    UNW_SLT_NONE,	/* register is not saved ("not an l-value") */
+    UNW_SLT_MEMORY,	/* register has been saved in memory */
+    UNW_SLT_REG		/* register has been saved in (another) register */
+  }
+unw_save_loc_type_t;
+
+typedef struct unw_save_loc
+  {
+    unw_save_loc_type_t type;
+    union
+      {
+	unw_word_t addr;	/* valid if type==UNW_SLT_MEMORY */
+	unw_regnum_t regnum;	/* valid if type==UNW_SLT_REG */
+      }
+    u;
+    unw_tdep_save_loc_t extra;	/* target-dependent additional information */
+  }
+unw_save_loc_t;
+
+/* These routines work both for local and remote unwinding.  */
+
+#define unw_local_addr_space	UNW_OBJ(local_addr_space)
+#define unw_create_addr_space	UNW_OBJ(create_addr_space)
+#define unw_destroy_addr_space	UNW_OBJ(destroy_addr_space)
+#define unw_get_accessors	UNW_ARCH_OBJ(get_accessors)
+#define unw_get_accessors_int	UNW_ARCH_OBJ(get_accessors_int)
+#define unw_init_local		UNW_OBJ(init_local)
+#define unw_init_local2	        UNW_OBJ(init_local2)
+#define unw_init_remote		UNW_OBJ(init_remote)
+#define unw_step		UNW_OBJ(step)
+#define unw_resume		UNW_OBJ(resume)
+#define unw_get_proc_info	UNW_OBJ(get_proc_info)
+#define unw_get_proc_info_by_ip	UNW_OBJ(get_proc_info_by_ip)
+#define unw_reg_states_iterate  UNW_OBJ(reg_states_iterate)
+#define unw_apply_reg_state     UNW_OBJ(apply_reg_state)
+#define unw_get_reg		UNW_OBJ(get_reg)
+#define unw_set_reg		UNW_OBJ(set_reg)
+#define unw_get_fpreg		UNW_OBJ(get_fpreg)
+#define unw_set_fpreg		UNW_OBJ(set_fpreg)
+#define unw_get_save_loc	UNW_OBJ(get_save_loc)
+#define unw_is_signal_frame	UNW_OBJ(is_signal_frame)
+#define unw_get_proc_name	UNW_OBJ(get_proc_name)
+#define unw_set_caching_policy	UNW_OBJ(set_caching_policy)
+#define unw_set_cache_size	UNW_OBJ(set_cache_size)
+#define unw_regname		UNW_ARCH_OBJ(regname)
+#define unw_flush_cache		UNW_ARCH_OBJ(flush_cache)
+#define unw_strerror		UNW_ARCH_OBJ(strerror)
+
+extern unw_addr_space_t unw_create_addr_space (unw_accessors_t *, int);
+extern void unw_destroy_addr_space (unw_addr_space_t);
+extern unw_accessors_t *unw_get_accessors (unw_addr_space_t);
+extern unw_accessors_t *unw_get_accessors_int (unw_addr_space_t);
+extern void unw_flush_cache (unw_addr_space_t, unw_word_t, unw_word_t);
+extern int unw_set_caching_policy (unw_addr_space_t, unw_caching_policy_t);
+extern int unw_set_cache_size (unw_addr_space_t, size_t, int);
+extern const char *unw_regname (unw_regnum_t);
+
+extern int unw_init_local (unw_cursor_t *, unw_context_t *);
+extern int unw_init_local2 (unw_cursor_t *, unw_context_t *, int);
+extern int unw_init_remote (unw_cursor_t *, unw_addr_space_t, void *);
+extern int unw_step (unw_cursor_t *);
+extern int unw_resume (unw_cursor_t *);
+extern int unw_get_proc_info (unw_cursor_t *, unw_proc_info_t *);
+extern int unw_get_proc_info_by_ip (unw_addr_space_t, unw_word_t,
+				    unw_proc_info_t *, void *);
+extern int unw_reg_states_iterate (unw_cursor_t *, unw_reg_states_callback, void *);
+extern int unw_apply_reg_state (unw_cursor_t *, void *);
+extern int unw_get_reg (unw_cursor_t *, int, unw_word_t *);
+extern int unw_set_reg (unw_cursor_t *, int, unw_word_t);
+extern int unw_get_fpreg (unw_cursor_t *, int, unw_fpreg_t *);
+extern int unw_set_fpreg (unw_cursor_t *, int, unw_fpreg_t);
+extern int unw_get_save_loc (unw_cursor_t *, int, unw_save_loc_t *);
+extern int unw_is_signal_frame (unw_cursor_t *);
+extern int unw_get_proc_name (unw_cursor_t *, char *, size_t, unw_word_t *);
+extern const char *unw_strerror (int);
+extern int unw_backtrace (void **, int);
+
+extern unw_addr_space_t unw_local_addr_space;
diff --git a/src/third_party/unwind/platform/linux_x86_64/install/include/libunwind-dynamic.h b/src/third_party/unwind/platform/linux_x86_64/install/include/libunwind-dynamic.h
new file mode 100644
index 00000000000..edb0bbd343d
--- /dev/null
+++ b/src/third_party/unwind/platform/linux_x86_64/install/include/libunwind-dynamic.h
@@ -0,0 +1,214 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* This file defines the runtime-support routines for dynamically
+generated code.  Even though it is implemented as part of libunwind,
+it is logically separate from the interface to perform the actual
+unwinding.  In particular, this interface is always used in the
+context of the unwind target, whereas the rest of the unwind API is
+used in context of the process that is doing the unwind (which may be
+a debugger running on another machine, for example).
+
+Note that the data-structures declared here server a dual purpose:
+when a program registers a dynamically generated procedure, it uses
+these structures directly.  On the other hand, with remote-unwinding,
+the data-structures are read from the remote process's memory and
+translated into internalized versions.  To facilitate remote-access,
+the following rules should be followed in declaring these structures:
+
+ (1) Declare a member as a pointer only if the the information the
+     member points to needs to be internalized as well (e.g., a
+     string representing a procedure name should be declared as
+     "const char *", but the instruction pointer should be declared
+     as unw_word_t).
+
+ (2) Provide sufficient padding to ensure that no implicit padding
+     will be needed on any of the supported target architectures.  For
+     the time being, padding data structures with the assumption that
+     sizeof (unw_word_t) == 8 should be sufficient.  (Note: it's not
+     impossible to internalize structures with internal padding, but
+     it does make the process a bit harder).
+
+ (3) Don't declare members that contain bitfields or floating-point
+     values.
+
+ (4) Don't declare members with enumeration types.  Declare them as
+     int32_t instead.  */
+
+typedef enum
+  {
+    UNW_DYN_STOP = 0,           /* end-of-unwind-info marker */
+    UNW_DYN_SAVE_REG,           /* save register to another register */
+    UNW_DYN_SPILL_FP_REL,       /* frame-pointer-relative register spill */
+    UNW_DYN_SPILL_SP_REL,       /* stack-pointer-relative register spill */
+    UNW_DYN_ADD,                /* add constant value to a register */
+    UNW_DYN_POP_FRAMES,         /* drop one or more stack frames */
+    UNW_DYN_LABEL_STATE,        /* name the current state */
+    UNW_DYN_COPY_STATE,         /* set the region's entry-state */
+    UNW_DYN_ALIAS               /* get unwind info from an alias */
+  }
+unw_dyn_operation_t;
+
+typedef enum
+  {
+    UNW_INFO_FORMAT_DYNAMIC,            /* unw_dyn_proc_info_t */
+    UNW_INFO_FORMAT_TABLE,              /* unw_dyn_table_t */
+    UNW_INFO_FORMAT_REMOTE_TABLE,       /* unw_dyn_remote_table_t */
+    UNW_INFO_FORMAT_ARM_EXIDX,          /* ARM specific unwind info */
+    UNW_INFO_FORMAT_IP_OFFSET,          /* Like UNW_INFO_FORMAT_REMOTE_TABLE, but
+                                           table entries are considered
+                                           relative to di->start_ip, rather
+                                           than di->segbase */
+  }
+unw_dyn_info_format_t;
+
+typedef struct unw_dyn_op
+  {
+    int8_t tag;                         /* what operation? */
+    int8_t qp;                          /* qualifying predicate register */
+    int16_t reg;                        /* what register */
+    int32_t when;                       /* when does it take effect? */
+    unw_word_t val;                     /* auxiliary value */
+  }
+unw_dyn_op_t;
+
+typedef struct unw_dyn_region_info
+  {
+    struct unw_dyn_region_info *next;   /* linked list of regions */
+    int32_t insn_count;                 /* region length (# of instructions) */
+    uint32_t op_count;                  /* length of op-array */
+    unw_dyn_op_t op[1];                 /* variable-length op-array */
+  }
+unw_dyn_region_info_t;
+
+typedef struct unw_dyn_proc_info
+  {
+    unw_word_t name_ptr;        /* address of human-readable procedure name */
+    unw_word_t handler;         /* address of personality routine */
+    uint32_t flags;
+    int32_t pad0;
+    unw_dyn_region_info_t *regions;
+  }
+unw_dyn_proc_info_t;
+
+typedef struct unw_dyn_table_info
+  {
+    unw_word_t name_ptr;        /* addr. of table name (e.g., library name) */
+    unw_word_t segbase;         /* segment base */
+    unw_word_t table_len;       /* must be a multiple of sizeof(unw_word_t)! */
+    unw_word_t *table_data;
+  }
+unw_dyn_table_info_t;
+
+typedef struct unw_dyn_remote_table_info
+  {
+    unw_word_t name_ptr;        /* addr. of table name (e.g., library name) */
+    unw_word_t segbase;         /* segment base */
+    unw_word_t table_len;       /* must be a multiple of sizeof(unw_word_t)! */
+    unw_word_t table_data;
+  }
+unw_dyn_remote_table_info_t;
+
+typedef struct unw_dyn_info
+  {
+    /* doubly-linked list of dyn-info structures: */
+    struct unw_dyn_info *next;
+    struct unw_dyn_info *prev;
+    unw_word_t start_ip;        /* first IP covered by this entry */
+    unw_word_t end_ip;          /* first IP NOT covered by this entry */
+    unw_word_t gp;              /* global-pointer in effect for this entry */
+    int32_t format;             /* real type: unw_dyn_info_format_t */
+    int32_t pad;
+    union
+      {
+        unw_dyn_proc_info_t pi;
+        unw_dyn_table_info_t ti;
+        unw_dyn_remote_table_info_t rti;
+      }
+    u;
+  }
+unw_dyn_info_t;
+
+typedef struct unw_dyn_info_list
+  {
+    uint32_t version;
+    uint32_t generation;
+    unw_dyn_info_t *first;
+  }
+unw_dyn_info_list_t;
+
+/* Return the size (in bytes) of an unw_dyn_region_info_t structure that can
+   hold OP_COUNT ops.  */
+#define _U_dyn_region_info_size(op_count)                               \
+        ((char *) (((unw_dyn_region_info_t *) NULL)->op + (op_count))   \
+         - (char *) NULL)
+
+/* Register the unwind info for a single procedure.
+   This routine is NOT signal-safe.  */
+extern void _U_dyn_register (unw_dyn_info_t *);
+
+/* Cancel the unwind info for a single procedure.
+   This routine is NOT signal-safe.  */
+extern void _U_dyn_cancel (unw_dyn_info_t *);
+
+
+/* Convenience routines.  */
+
+#define _U_dyn_op(_tag, _qp, _when, _reg, _val)                         \
+        ((unw_dyn_op_t) { (_tag), (_qp), (_reg), (_when), (_val) })
+
+#define _U_dyn_op_save_reg(op, qp, when, reg, dst)                      \
+        (*(op) = _U_dyn_op (UNW_DYN_SAVE_REG, (qp), (when), (reg), (dst)))
+
+#define _U_dyn_op_spill_fp_rel(op, qp, when, reg, offset)               \
+        (*(op) = _U_dyn_op (UNW_DYN_SPILL_FP_REL, (qp), (when), (reg),  \
+                            (offset)))
+
+#define _U_dyn_op_spill_sp_rel(op, qp, when, reg, offset)               \
+        (*(op) = _U_dyn_op (UNW_DYN_SPILL_SP_REL, (qp), (when), (reg),  \
+                            (offset)))
+
+#define _U_dyn_op_add(op, qp, when, reg, value)                         \
+        (*(op) = _U_dyn_op (UNW_DYN_ADD, (qp), (when), (reg), (value)))
+
+#define _U_dyn_op_pop_frames(op, qp, when, num_frames)                  \
+        (*(op) = _U_dyn_op (UNW_DYN_POP_FRAMES, (qp), (when), 0, (num_frames)))
+
+#define _U_dyn_op_label_state(op, label)                                \
+        (*(op) = _U_dyn_op (UNW_DYN_LABEL_STATE, _U_QP_TRUE, -1, 0, (label)))
+
+#define _U_dyn_op_copy_state(op, label)                                 \
+        (*(op) = _U_dyn_op (UNW_DYN_COPY_STATE, _U_QP_TRUE, -1, 0, (label)))
+
+#define _U_dyn_op_alias(op, qp, when, addr)                             \
+        (*(op) = _U_dyn_op (UNW_DYN_ALIAS, (qp), (when), 0, (addr)))
+
+#define _U_dyn_op_stop(op)                                              \
+        (*(op) = _U_dyn_op (UNW_DYN_STOP, _U_QP_TRUE, -1, 0, 0))
+
+/* The target-dependent qualifying predicate which is always TRUE.  On
+   IA-64, that's p0 (0), on non-predicated architectures, the value is
+   ignored.  */
+#define _U_QP_TRUE      _U_TDEP_QP_TRUE
diff --git a/src/third_party/unwind/platform/linux_x86_64/install/include/libunwind-x86_64.h b/src/third_party/unwind/platform/linux_x86_64/install/include/libunwind-x86_64.h
new file mode 100644
index 00000000000..78eb541afb3
--- /dev/null
+++ b/src/third_party/unwind/platform/linux_x86_64/install/include/libunwind-x86_64.h
@@ -0,0 +1,141 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002-2004 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef LIBUNWIND_H
+#define LIBUNWIND_H
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+#include <sys/types.h>
+#include <inttypes.h>
+#include <ucontext.h>
+
+#define UNW_TARGET              x86_64
+#define UNW_TARGET_X86_64       1
+
+#define _U_TDEP_QP_TRUE 0       /* see libunwind-dynamic.h  */
+
+/* This needs to be big enough to accommodate "struct cursor", while
+   leaving some slack for future expansion.  Changing this value will
+   require recompiling all users of this library.  Stack allocation is
+   relatively cheap and unwind-state copying is relatively rare, so we
+   want to err on making it rather too big than too small.  */
+#define UNW_TDEP_CURSOR_LEN     127
+
+typedef uint64_t unw_word_t;
+typedef int64_t unw_sword_t;
+
+typedef long double unw_tdep_fpreg_t;
+
+typedef enum
+  {
+    UNW_X86_64_RAX,
+    UNW_X86_64_RDX,
+    UNW_X86_64_RCX,
+    UNW_X86_64_RBX,
+    UNW_X86_64_RSI,
+    UNW_X86_64_RDI,
+    UNW_X86_64_RBP,
+    UNW_X86_64_RSP,
+    UNW_X86_64_R8,
+    UNW_X86_64_R9,
+    UNW_X86_64_R10,
+    UNW_X86_64_R11,
+    UNW_X86_64_R12,
+    UNW_X86_64_R13,
+    UNW_X86_64_R14,
+    UNW_X86_64_R15,
+    UNW_X86_64_RIP,
+#ifdef CONFIG_MSABI_SUPPORT
+    UNW_X86_64_XMM0,
+    UNW_X86_64_XMM1,
+    UNW_X86_64_XMM2,
+    UNW_X86_64_XMM3,
+    UNW_X86_64_XMM4,
+    UNW_X86_64_XMM5,
+    UNW_X86_64_XMM6,
+    UNW_X86_64_XMM7,
+    UNW_X86_64_XMM8,
+    UNW_X86_64_XMM9,
+    UNW_X86_64_XMM10,
+    UNW_X86_64_XMM11,
+    UNW_X86_64_XMM12,
+    UNW_X86_64_XMM13,
+    UNW_X86_64_XMM14,
+    UNW_X86_64_XMM15,
+    UNW_TDEP_LAST_REG = UNW_X86_64_XMM15,
+#else
+    UNW_TDEP_LAST_REG = UNW_X86_64_RIP,
+#endif
+
+    /* XXX Add other regs here */
+
+    /* frame info (read-only) */
+    UNW_X86_64_CFA,
+
+    UNW_TDEP_IP = UNW_X86_64_RIP,
+    UNW_TDEP_SP = UNW_X86_64_RSP,
+    UNW_TDEP_BP = UNW_X86_64_RBP,
+    UNW_TDEP_EH = UNW_X86_64_RAX
+  }
+x86_64_regnum_t;
+
+#define UNW_TDEP_NUM_EH_REGS    2       /* XXX Not sure what this means */
+
+typedef struct unw_tdep_save_loc
+  {
+    /* Additional target-dependent info on a save location.  */
+    char unused;
+  }
+unw_tdep_save_loc_t;
+
+/* On x86_64, we can directly use ucontext_t as the unwind context.  */
+typedef ucontext_t unw_tdep_context_t;
+
+typedef struct
+  {
+    /* no x86-64-specific auxiliary proc-info */
+    char unused;
+  }
+unw_tdep_proc_info_t;
+
+#include "libunwind-dynamic.h"
+#include "libunwind-common.h"
+
+#define unw_tdep_getcontext             UNW_ARCH_OBJ(getcontext)
+#define unw_tdep_is_fpreg               UNW_ARCH_OBJ(is_fpreg)
+
+extern int unw_tdep_getcontext (unw_tdep_context_t *);
+extern int unw_tdep_is_fpreg (int);
+
+#if defined(__cplusplus) || defined(c_plusplus)
+}
+#endif
+
+#endif /* LIBUNWIND_H */
diff --git a/src/third_party/unwind/platform/linux_x86_64/install/include/libunwind.h b/src/third_party/unwind/platform/linux_x86_64/install/include/libunwind.h
new file mode 100644
index 00000000000..91bb8ef9cad
--- /dev/null
+++ b/src/third_party/unwind/platform/linux_x86_64/install/include/libunwind.h
@@ -0,0 +1,38 @@
+/* Provide a real file - not a symlink - as it would cause multiarch conflicts
+   when multiple different arch releases are installed simultaneously.  */
+
+#ifndef UNW_REMOTE_ONLY
+
+#if defined __aarch64__
+#include "libunwind-aarch64.h"
+#elif defined __arm__
+# include "libunwind-arm.h"
+#elif defined __hppa__
+# include "libunwind-hppa.h"
+#elif defined __ia64__
+# include "libunwind-ia64.h"
+#elif defined __mips__
+# include "libunwind-mips.h"
+#elif defined __powerpc__ && !defined __powerpc64__
+# include "libunwind-ppc32.h"
+#elif defined __powerpc64__
+# include "libunwind-ppc64.h"
+#elif defined __sh__
+# include "libunwind-sh.h"
+#elif defined __i386__
+# include "libunwind-x86.h"
+#elif defined __x86_64__
+# include "libunwind-x86_64.h"
+#elif defined __tilegx__
+# include "libunwind-tilegx.h"
+#elif defined __s390x__
+# include "libunwind-s390x.h"
+#else
+# error "Unsupported arch"
+#endif
+
+#else /* UNW_REMOTE_ONLY */
+
+# include "libunwind-x86_64.h"
+
+#endif /* UNW_REMOTE_ONLY */
diff --git a/src/third_party/unwind/platform/linux_x86_64/install/include/unwind.h b/src/third_party/unwind/platform/linux_x86_64/install/include/unwind.h
new file mode 100644
index 00000000000..7cf128deca3
--- /dev/null
+++ b/src/third_party/unwind/platform/linux_x86_64/install/include/unwind.h
@@ -0,0 +1,154 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003 Hewlett-Packard Co
+        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef _UNWIND_H
+#define _UNWIND_H
+
+/* For uint64_t */
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Minimal interface as per C++ ABI draft standard:
+
+        http://www.codesourcery.com/cxx-abi/abi-eh.html */
+
+typedef enum
+  {
+    _URC_NO_REASON = 0,
+    _URC_FOREIGN_EXCEPTION_CAUGHT = 1,
+    _URC_FATAL_PHASE2_ERROR = 2,
+    _URC_FATAL_PHASE1_ERROR = 3,
+    _URC_NORMAL_STOP = 4,
+    _URC_END_OF_STACK = 5,
+    _URC_HANDLER_FOUND = 6,
+    _URC_INSTALL_CONTEXT = 7,
+    _URC_CONTINUE_UNWIND = 8
+  }
+_Unwind_Reason_Code;
+
+typedef int _Unwind_Action;
+
+#define _UA_SEARCH_PHASE        1
+#define _UA_CLEANUP_PHASE       2
+#define _UA_HANDLER_FRAME       4
+#define _UA_FORCE_UNWIND        8
+
+struct _Unwind_Context;         /* opaque data-structure */
+struct _Unwind_Exception;       /* forward-declaration */
+
+typedef void (*_Unwind_Exception_Cleanup_Fn) (_Unwind_Reason_Code,
+                                              struct _Unwind_Exception *);
+
+typedef _Unwind_Reason_Code (*_Unwind_Stop_Fn) (int, _Unwind_Action,
+                                                uint64_t,
+                                                struct _Unwind_Exception *,
+                                                struct _Unwind_Context *,
+                                                void *);
+
+/* The C++ ABI requires exception_class, private_1, and private_2 to
+   be of type uint64 and the entire structure to be
+   double-word-aligned. Please note that exception_class stays 64-bit 
+   even on 32-bit machines for gcc compatibility.  */
+struct _Unwind_Exception
+  {
+    uint64_t exception_class;
+    _Unwind_Exception_Cleanup_Fn exception_cleanup;
+    unsigned long private_1;
+    unsigned long private_2;
+  } __attribute__((__aligned__));
+
+extern _Unwind_Reason_Code _Unwind_RaiseException (struct _Unwind_Exception *);
+extern _Unwind_Reason_Code _Unwind_ForcedUnwind (struct _Unwind_Exception *,
+                                                 _Unwind_Stop_Fn, void *);
+extern void _Unwind_Resume (struct _Unwind_Exception *);
+extern void _Unwind_DeleteException (struct _Unwind_Exception *);
+extern unsigned long _Unwind_GetGR (struct _Unwind_Context *, int);
+extern void _Unwind_SetGR (struct _Unwind_Context *, int, unsigned long);
+extern unsigned long _Unwind_GetIP (struct _Unwind_Context *);
+extern unsigned long _Unwind_GetIPInfo (struct _Unwind_Context *, int *);
+extern void _Unwind_SetIP (struct _Unwind_Context *, unsigned long);
+extern unsigned long _Unwind_GetLanguageSpecificData (struct _Unwind_Context*);
+extern unsigned long _Unwind_GetRegionStart (struct _Unwind_Context *);
+
+#ifdef _GNU_SOURCE
+
+/* Callback for _Unwind_Backtrace().  The backtrace stops immediately
+   if the callback returns any value other than _URC_NO_REASON. */
+typedef _Unwind_Reason_Code (*_Unwind_Trace_Fn) (struct _Unwind_Context *,
+                                                 void *);
+
+/* See http://gcc.gnu.org/ml/gcc-patches/2001-09/msg00082.html for why
+   _UA_END_OF_STACK exists.  */
+# define _UA_END_OF_STACK       16
+
+/* If the unwind was initiated due to a forced unwind, resume that
+   operation, else re-raise the exception.  This is used by
+   __cxa_rethrow().  */
+extern _Unwind_Reason_Code
+          _Unwind_Resume_or_Rethrow (struct _Unwind_Exception *);
+
+/* See http://gcc.gnu.org/ml/gcc-patches/2003-09/msg00154.html for why
+   _Unwind_GetBSP() exists.  */
+extern unsigned long _Unwind_GetBSP (struct _Unwind_Context *);
+
+/* Return the "canonical frame address" for the given context.
+   This is used by NPTL... */
+extern unsigned long _Unwind_GetCFA (struct _Unwind_Context *);
+
+/* Return the base-address for data references.  */
+extern unsigned long _Unwind_GetDataRelBase (struct _Unwind_Context *);
+
+/* Return the base-address for text references.  */
+extern unsigned long _Unwind_GetTextRelBase (struct _Unwind_Context *);
+
+/* Call _Unwind_Trace_Fn once for each stack-frame, without doing any
+   cleanup.  The first frame for which the callback is invoked is the
+   one for the caller of _Unwind_Backtrace().  _Unwind_Backtrace()
+   returns _URC_END_OF_STACK when the backtrace stopped due to
+   reaching the end of the call-chain or _URC_FATAL_PHASE1_ERROR if it
+   stops for any other reason.  */
+extern _Unwind_Reason_Code _Unwind_Backtrace (_Unwind_Trace_Fn, void *);
+
+/* Find the start-address of the procedure containing the specified IP
+   or NULL if it cannot be found (e.g., because the function has no
+   unwind info).  Note: there is not necessarily a one-to-one
+   correspondence between source-level functions and procedures: some
+   functions don't have unwind-info and others are split into multiple
+   procedures.  */
+extern void *_Unwind_FindEnclosingFunction (void *);
+
+/* See also Linux Standard Base Spec:
+    http://www.linuxbase.org/spec/refspecs/LSB_1.3.0/gLSB/gLSB/libgcc-s.html */
+
+#endif /* _GNU_SOURCE */
+
+#ifdef __cplusplus
+};
+#endif
+
+#endif /* _UNWIND_H */
diff --git a/src/third_party/unwind/scripts/host_config.sh b/src/third_party/unwind/scripts/host_config.sh
new file mode 100755
index 00000000000..215c77892f7
--- /dev/null
+++ b/src/third_party/unwind/scripts/host_config.sh
@@ -0,0 +1,51 @@
+#!/bin/bash
+# Configures a libunwind suitable for use in the mongo server, built on the host machine.
+
+set -euo pipefail
+IFS=$'\n\t'
+
+set -vx
+
+TOOLCHAIN_ROOT=/opt/mongodbtoolchain/v3
+PATH="$TOOLCHAIN_ROOT/bin:$PATH"
+
+DEST_DIR=$(git rev-parse --show-toplevel)/src/third_party/unwind
+
+HOST_OS="$(uname -s|tr A-Z a-z)"
+HOST_ARCH="$(uname -m)"
+HOST_DIR="$DEST_DIR/platform/${HOST_OS}_${HOST_ARCH}"
+
+SRC_DIR=${DEST_DIR}/dist
+
+mkdir -p $HOST_DIR/build
+pushd $HOST_DIR/build
+
+# force disable:
+#   coredump : postmortem analysis of core memory dumps
+#   ptrace : unwinding stacks in another process
+#   setjmp : provides a nonlocal goto feature
+#   documentation : won't need them
+#   tests : won't need them
+#   dependency-tracking : (from automake) disabled because we only do one build
+# force enable:
+#   cxx-exceptions : configure.ac: "C++ exception handling doesn't work too well on x86"
+$SRC_DIR/configure \
+    --disable-coredump \
+    --disable-dependency-tracking \
+    --disable-documentation \
+    --disable-minidebuginfo \
+    --disable-ptrace \
+    --disable-setjmp \
+    --disable-shared \
+    --disable-tests \
+    --enable-cxx-exceptions \
+    --prefix=$HOST_DIR/install \
+    CC=$TOOLCHAIN_ROOT/bin/gcc \
+    CXX=$TOOLCHAIN_ROOT/bin/g++
+
+
+CC=$TOOLCHAIN_ROOT/bin/gcc
+CXX=$TOOLCHAIN_ROOT/bin/g++
+
+make CC=$CC CXX=$CXX install
+popd
diff --git a/src/third_party/unwind/scripts/import.sh b/src/third_party/unwind/scripts/import.sh
new file mode 100755
index 00000000000..22489b4e4ab
--- /dev/null
+++ b/src/third_party/unwind/scripts/import.sh
@@ -0,0 +1,35 @@
+#!/bin/bash
+# This script downloads and imports libunwind
+
+set -euo pipefail
+IFS=$'\n\t'
+
+set -vx
+
+NAME=libunwind
+REVISION=334047a04e59287463348a9e333947b5e59ddd91 # 2019-04-02
+VERSION="1.4-rc1"
+
+DEST_DIR=$(git rev-parse --show-toplevel)/src/third_party/unwind
+if [[ -d $DEST_DIR/dist ]]; then
+    echo "You must remove '$DEST_DIR/dist' before running $0" >&2
+    exit 1
+fi
+
+UNWIND_GIT_DIR=$(mktemp -d /tmp/import-libunwind.XXXXXX)
+trap "rm -rf $UNWIND_GIT_DIR" EXIT
+
+git clone git@github.com:mongodb-forks/libunwind.git $UNWIND_GIT_DIR
+git -C $UNWIND_GIT_DIR checkout $REVISION
+
+pushd $UNWIND_GIT_DIR
+NOCONFIGURE=1 ./autogen.sh
+./configure
+make dist
+popd
+
+DIST_TGZ=$UNWIND_GIT_DIR/libunwind-$VERSION.tar.gz
+
+mkdir -p $DEST_DIR/dist
+tar --strip-components=1 -xvzf $DIST_TGZ  -C $DEST_DIR/dist
+# mv libunwind-$VERSION libunwind