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Diffstat (limited to 'libatomic/configure.ac')
| -rw-r--r-- | libatomic/configure.ac | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/libatomic/configure.ac b/libatomic/configure.ac new file mode 100644 index 00000000000..18d1dea0503 --- /dev/null +++ b/libatomic/configure.ac @@ -0,0 +1,255 @@ +# Process this file with autoreconf to produce a configure script. +# Copyright (C) 2012 Free Software Foundation, Inc. +# +# This file is part of the GNU Atomic Library (libatomic). +# +# Libatomic 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. +# +# Libatomic 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. +# +# Under Section 7 of GPL version 3, you are granted additional +# permissions described in the GCC Runtime Library Exception, version +# 3.1, as published by the Free Software Foundation. +# +# You should have received a copy of the GNU General Public License and +# a copy of the GCC Runtime Library Exception along with this program; +# see the files COPYING3 and COPYING.RUNTIME respectively. If not, see +# <http://www.gnu.org/licenses/>. + +AC_PREREQ(2.59) +AC_INIT([GNU Atomic Library], 1.0,,[libatomic]) +AC_CONFIG_HEADER(auto-config.h) + +# ------- +# Options +# ------- + +AC_MSG_CHECKING([for --enable-version-specific-runtime-libs]) +LIBAT_ENABLE(version-specific-runtime-libs, no, , + [Specify that runtime libraries should be installed in a compiler-specific directory], + permit yes|no) +AC_MSG_RESULT($enable_version_specific_runtime_libs) + +# We would like our source tree to be readonly. However when releases or +# pre-releases are generated, the flex/bison generated files as well as the +# various formats of manuals need to be included along with the rest of the +# sources. Therefore we have --enable-generated-files-in-srcdir to do +# just that. +AC_MSG_CHECKING([for --enable-generated-files-in-srcdir]) +LIBAT_ENABLE(generated-files-in-srcdir, no, , + [put copies of generated files in source dir intended for creating source + tarballs for users without texinfo bison or flex.], + permit yes|no) +AC_MSG_RESULT($enable_generated_files_in_srcdir) +AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes) + + +# ------- + +# Gets build, host, target, *_vendor, *_cpu, *_os, etc. +# +# You will slowly go insane if you do not grok the following fact: when +# building this library, the top-level /target/ becomes the library's /host/. +# +# configure then causes --target to default to --host, exactly like any +# other package using autoconf. Therefore, 'target' and 'host' will +# always be the same. This makes sense both for native and cross compilers +# just think about it for a little while. :-) +# +# Also, if this library is being configured as part of a cross compiler, the +# top-level configure script will pass the "real" host as $with_cross_host. +# +# Do not delete or change the following two lines. For why, see +# http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html +AC_CANONICAL_SYSTEM +target_alias=${target_alias-$host_alias} + +# Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the +# following is magically included in AUTOMAKE_OPTIONS in each Makefile.am. +# 1.9.0: minimum required version +# no-define: PACKAGE and VERSION will not be #define'd in config.h (a bunch +# of other PACKAGE_* variables will, however, and there's nothing +# we can do about that; they come from AC_INIT). +# foreign: we don't follow the normal rules for GNU packages (no COPYING +# file in the top srcdir, etc, etc), so stop complaining. +# -Wall: turns on all automake warnings... +# -Wno-portability: ...except this one, since GNU make is required. +# -Wno-override: ... and this one, since we do want this in testsuite. +AM_INIT_AUTOMAKE([1.9.0 foreign -Wall -Wno-portability -Wno-override]) +AM_ENABLE_MULTILIB(, ..) + +# Calculate toolexeclibdir +# Also toolexecdir, though it's only used in toolexeclibdir +case ${enable_version_specific_runtime_libs} in + yes) + # Need the gcc compiler version to know where to install libraries + # and header files if --enable-version-specific-runtime-libs option + # is selected. + toolexecdir='$(libdir)/gcc/$(target_alias)' + toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)' + ;; + no) + if test -n "$with_cross_host" && + test x"$with_cross_host" != x"no"; then + # Install a library built with a cross compiler in tooldir, not libdir. + toolexecdir='$(exec_prefix)/$(target_alias)' + toolexeclibdir='$(toolexecdir)/lib' + else + toolexecdir='$(libdir)/gcc-lib/$(target_alias)' + toolexeclibdir='$(libdir)' + fi + multi_os_directory=`$CC -print-multi-os-directory` + case $multi_os_directory in + .) ;; # Avoid trailing /. + *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;; + esac + ;; +esac +AC_SUBST(toolexecdir) +AC_SUBST(toolexeclibdir) + +# Check the compiler. +# The same as in boehm-gc and libstdc++. Have to borrow it from there. +# We must force CC to /not/ be precious variables; otherwise +# the wrong, non-multilib-adjusted value will be used in multilibs. +# As a side effect, we have to subst CFLAGS ourselves. + +m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS]) +m4_define([_AC_ARG_VAR_PRECIOUS],[]) +AC_PROG_CC +AM_PROG_AS +m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS]) + +AC_SUBST(CFLAGS) + +# In order to override CFLAGS_FOR_TARGET, all of our special flags go +# in XCFLAGS. But we need them in CFLAGS during configury. So put them +# in both places for now and restore CFLAGS at the end of config. +save_CFLAGS="$CFLAGS" + +# Find other programs we need. +AC_CHECK_TOOL(AR, ar) +AC_CHECK_TOOL(NM, nm) +AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error) +AC_PATH_PROG(PERL, perl, perl-not-found-in-path-error) +AC_PROG_INSTALL + +# Configure libtool +AM_PROG_LIBTOOL +AC_SUBST(enable_shared) +AC_SUBST(enable_static) + +# For libtool versioning info, format is CURRENT:REVISION:AGE +libtool_VERSION=1:0:0 +AC_SUBST(libtool_VERSION) + +# Get target configury. +. ${srcdir}/configure.tgt +if test -n "$UNSUPPORTED"; then + AC_MSG_ERROR([Configuration ${target} is unsupported.]) +fi + +# Disable fallbacks to __sync routines from libgcc. Otherwise we'll +# make silly decisions about what the cpu can do. +CFLAGS="$save_CFLAGS -fno-sync-libcalls $XCFLAGS" + +# Check header files. +AC_STDC_HEADERS +ACX_HEADER_STRING +GCC_HEADER_STDINT(gstdint.h) + +# Check for common type sizes +LIBAT_FORALL_MODES([LIBAT_HAVE_INT_MODE]) + +# Check for compiler builtins of atomic operations. +LIBAT_TEST_ATOMIC_INIT +LIBAT_FORALL_MODES([LIBAT_HAVE_ATOMIC_LOADSTORE]) +LIBAT_FORALL_MODES([LIBAT_HAVE_ATOMIC_TAS]) +LIBAT_FORALL_MODES([LIBAT_HAVE_ATOMIC_EXCHANGE]) +LIBAT_FORALL_MODES([LIBAT_HAVE_ATOMIC_CAS]) +LIBAT_FORALL_MODES([LIBAT_HAVE_ATOMIC_FETCH_ADD]) +LIBAT_FORALL_MODES([LIBAT_HAVE_ATOMIC_FETCH_OP]) + +AC_C_BIGENDIAN +# I don't like the default behaviour of WORDS_BIGENDIAN undefined for LE. +AH_BOTTOM( +[#ifndef WORDS_BIGENDIAN +#define WORDS_BIGENDIAN 0 +#endif]) + +LIBAT_WORDSIZE + +# Check to see if -pthread or -lpthread is needed. Prefer the former. +# In case the pthread.h system header is not found, this test will fail. +case " $config_path " in + *" posix "*) + XPCFLAGS="" + CFLAGS="$CFLAGS -pthread" + AC_LINK_IFELSE( + [AC_LANG_PROGRAM( + [#include <pthread.h> + void *g(void *d) { return NULL; }], + [pthread_t t; pthread_create(&t,NULL,g,NULL);])], + [XPCFLAGS=" -pthread"], + [CFLAGS="$save_CFLAGS $XCFLAGS" LIBS="-lpthread $LIBS" + AC_LINK_IFELSE( + [AC_LANG_PROGRAM( + [#include <pthread.h> + void *g(void *d) { return NULL; }], + [pthread_t t; pthread_create(&t,NULL,g,NULL);])], + [], + [AC_MSG_ERROR([Pthreads are required to build libatomic])])]) + CFLAGS="$save_CFLAGS $XCFLAGS" + ;; +esac + +# See what sort of export controls are available. +LIBAT_CHECK_ATTRIBUTE_VISIBILITY +LIBAT_CHECK_ATTRIBUTE_DLLEXPORT +LIBAT_CHECK_ATTRIBUTE_ALIAS +if test x$try_ifunc = xyes; then + LIBAT_CHECK_IFUNC +fi + +# Check linker support. +LIBAT_ENABLE_SYMVERS + +# Cleanup and exit. +CFLAGS="$save_CFLAGS" +AC_CACHE_SAVE + +# Add -Wall -Werror if we are using GCC. +if test "x$GCC" = "xyes"; then + XCFLAGS="$XCFLAGS -Wall -Werror" +fi + +XCFLAGS="$XCFLAGS $XPCFLAGS" + +AC_SUBST(config_path) +AC_SUBST(XCFLAGS) +AC_SUBST(XLDFLAGS) +AC_SUBST(LIBS) +AC_SUBST(SIZES) + +AM_CONDITIONAL(HAVE_IFUNC, test x$libat_cv_have_ifunc = xyes) +AM_CONDITIONAL(ARCH_ARM_LINUX, + [expr "$config_path" : ".* linux/arm .*" > /dev/null]) +AM_CONDITIONAL(ARCH_I386, + [test "$ARCH" = x86 && test x$libat_cv_wordsize = x4]) +AM_CONDITIONAL(ARCH_X86_64, + [test "$ARCH" = x86 && test x$libat_cv_wordsize = x8]) + +if test ${multilib} = yes; then + multilib_arg="--enable-multilib" +else + multilib_arg= +fi + +AC_CONFIG_FILES(Makefile testsuite/Makefile) +AC_OUTPUT |