Distribute autoconf helpers

Distribute aclocal.m4, install-sh, config.guess, and config.sub
to applications at build time instead of having multiple identical
copies committed in the repository.

1 files changed, 0 insertions, 1976 deletions

diff --git a/lib/megaco/aclocal.m4 b/lib/megaco/aclocal.m4
deleted file mode 100644
index d78025b0be..0000000000
--- a/lib/megaco/aclocal.m4
+++ /dev/null
@@ -1,1976 +0,0 @@
-dnl
-dnl %CopyrightBegin%
-dnl
-dnl Copyright Ericsson AB 1998-2013. All Rights Reserved.
-dnl
-dnl The contents of this file are subject to the Erlang Public License,
-dnl Version 1.1, (the "License"); you may not use this file except in
-dnl compliance with the License. You should have received a copy of the
-dnl Erlang Public License along with this software. If not, it can be
-dnl retrieved online at http://www.erlang.org/.
-dnl
-dnl Software distributed under the License is distributed on an "AS IS"
-dnl basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
-dnl the License for the specific language governing rights and limitations
-dnl under the License.
-dnl
-dnl %CopyrightEnd%
-dnl
-
-dnl
-dnl aclocal.m4
-dnl
-dnl Local macros used in configure.in. The Local Macros which
-dnl could/should be part of autoconf are prefixed LM_, macros specific
-dnl to the Erlang system are prefixed ERL_.
-dnl
-
-AC_DEFUN(LM_PRECIOUS_VARS,
-[
-
-dnl ERL_TOP
-AC_ARG_VAR(ERL_TOP, [Erlang/OTP top source directory])
-
-dnl Tools
-AC_ARG_VAR(CC, [C compiler])
-AC_ARG_VAR(CFLAGS, [C compiler flags])
-AC_ARG_VAR(STATIC_CFLAGS, [C compiler static flags])
-AC_ARG_VAR(CFLAG_RUNTIME_LIBRARY_PATH, [runtime library path linker flag passed via C compiler])
-AC_ARG_VAR(CPP, [C/C++ preprocessor])
-AC_ARG_VAR(CPPFLAGS, [C/C++ preprocessor flags])
-AC_ARG_VAR(CXX, [C++ compiler])
-AC_ARG_VAR(CXXFLAGS, [C++ compiler flags])
-AC_ARG_VAR(LD, [linker (is often overridden by configure)])
-AC_ARG_VAR(LDFLAGS, [linker flags (can be risky to set since LD may be overriden by configure)])
-AC_ARG_VAR(LIBS, [libraries])
-AC_ARG_VAR(DED_LD, [linker for Dynamic Erlang Drivers (set all DED_LD* variables or none)])
-AC_ARG_VAR(DED_LDFLAGS, [linker flags for Dynamic Erlang Drivers (set all DED_LD* variables or none)])
-AC_ARG_VAR(DED_LD_FLAG_RUNTIME_LIBRARY_PATH, [runtime library path linker flag for Dynamic Erlang Drivers (set all DED_LD* variables or none)])
-AC_ARG_VAR(LFS_CFLAGS, [large file support C compiler flags (set all LFS_* variables or none)])
-AC_ARG_VAR(LFS_LDFLAGS, [large file support linker flags (set all LFS_* variables or none)])
-AC_ARG_VAR(LFS_LIBS, [large file support libraries (set all LFS_* variables or none)])
-AC_ARG_VAR(RANLIB, [ranlib])
-AC_ARG_VAR(AR, [ar])
-AC_ARG_VAR(GETCONF, [getconf])
-
-dnl Cross system root
-AC_ARG_VAR(erl_xcomp_sysroot, [Absolute cross system root path (only used when cross compiling)])
-AC_ARG_VAR(erl_xcomp_isysroot, [Absolute cross system root include path (only used when cross compiling)])
-
-dnl Cross compilation variables
-AC_ARG_VAR(erl_xcomp_bigendian, [big endian system: yes|no (only used when cross compiling)])
-AC_ARG_VAR(erl_xcomp_double_middle_endian, [double-middle-endian system: yes|no (only used when cross compiling)])
-AC_ARG_VAR(erl_xcomp_linux_clock_gettime_correction, [clock_gettime() can be used for time correction: yes|no (only used when cross compiling)])
-AC_ARG_VAR(erl_xcomp_linux_nptl, [have Native POSIX Thread Library: yes|no (only used when cross compiling)])
-AC_ARG_VAR(erl_xcomp_linux_usable_sigusrx, [SIGUSR1 and SIGUSR2 can be used: yes|no (only used when cross compiling)])
-AC_ARG_VAR(erl_xcomp_linux_usable_sigaltstack, [have working sigaltstack(): yes|no (only used when cross compiling)])
-AC_ARG_VAR(erl_xcomp_poll, [have working poll(): yes|no (only used when cross compiling)])
-AC_ARG_VAR(erl_xcomp_kqueue, [have working kqueue(): yes|no (only used when cross compiling)])
-AC_ARG_VAR(erl_xcomp_putenv_copy, [putenv() stores key-value copy: yes|no (only used when cross compiling)])
-AC_ARG_VAR(erl_xcomp_reliable_fpe, [have reliable floating point exceptions: yes|no (only used when cross compiling)])
-AC_ARG_VAR(erl_xcomp_getaddrinfo, [have working getaddrinfo() for both IPv4 and IPv6: yes|no (only used when cross compiling)])
-AC_ARG_VAR(erl_xcomp_gethrvtime_procfs_ioctl, [have working gethrvtime() which can be used with procfs ioctl(): yes|no (only used when cross compiling)])
-AC_ARG_VAR(erl_xcomp_clock_gettime_cpu_time, [clock_gettime() can be used for retrieving process CPU time: yes|no (only used when cross compiling)])
-AC_ARG_VAR(erl_xcomp_after_morecore_hook, [__after_morecore_hook can track malloc()s core memory usage: yes|no (only used when cross compiling)])
-AC_ARG_VAR(erl_xcomp_dlsym_brk_wrappers, [dlsym(RTLD_NEXT, _) brk wrappers can track malloc()s core memory usage: yes|no (only used when cross compiling)])
-
-dnl Cross compilation variables for OSE
-AC_ARG_VAR(erl_xcomp_ose_ldflags_pass1, [Linker flags for the OSE module (pass 1) (only used when cross compiling for OSE)])
-AC_ARG_VAR(erl_xcomp_ose_ldflags_pass2, [Linker flags for the OSE module (pass 2) (only used when cross compiling for OSE)])
-AC_ARG_VAR(erl_xcomp_ose_OSEROOT, [OSE installation root directory (only used when cross compiling for OSE)])
-AC_ARG_VAR(erl_xcomp_ose_STRIP, [Strip utility shipped with the OSE distribution(only used when cross compiling for OSE)])
-AC_ARG_VAR(erl_xcomp_ose_LM_POST_LINK, [OSE postlink tool (only used when cross compiling for OSE)])
-AC_ARG_VAR(erl_xcomp_ose_LM_SET_CONF, [Sets the configuration for an OSE load module (only used when cross compiling for OSE)])
-AC_ARG_VAR(erl_xcomp_ose_LM_ELF_SIZE, [Prints the section size information for an OSE load module (only used when cross compiling for OSE)])
-AC_ARG_VAR(erl_xcomp_ose_LM_LCF, [OSE load module linker configuration file (only used when cross compiling for OSE)])
-AC_ARG_VAR(erl_xcomp_ose_BEAM_LM_CONF, [BEAM OSE load module default configuration file (only used when cross compiling for OSE)])
-AC_ARG_VAR(erl_xcomp_ose_EPMD_LM_CONF, [EPMD OSE load module default configuration file (only used when cross compiling for OSE)])
-AC_ARG_VAR(erl_xcomp_ose_RUN_ERL_LM_CONF, [run_erl_lm OSE load module default configuration file (only used when cross compiling for OSE)])
-AC_ARG_VAR(erl_xcomp_ose_CONFD, [OSE confd source file])
-AC_ARG_VAR(erl_xcomp_ose_CRT0_LM, [OSE crt0 lm source file])
-
-])
-
-AC_DEFUN(ERL_XCOMP_SYSROOT_INIT,
-[
-erl_xcomp_without_sysroot=no
-if test "$cross_compiling" = "yes"; then
-    test "$erl_xcomp_sysroot" != "" || erl_xcomp_without_sysroot=yes
-    test "$erl_xcomp_isysroot" != "" || erl_xcomp_isysroot="$erl_xcomp_sysroot"
-else
-    erl_xcomp_sysroot=
-    erl_xcomp_isysroot=
-fi
-])
-
-AC_DEFUN(LM_CHECK_GETCONF,
-[
-if test "$cross_compiling" != "yes"; then
-    AC_CHECK_PROG([GETCONF], [getconf], [getconf], [false])
-else
-    dnl First check if we got a `<HOST>-getconf' in $PATH
-    host_getconf="$host_alias-getconf"
-    AC_CHECK_PROG([GETCONF], [$host_getconf], [$host_getconf], [false])
-    if test "$GETCONF" = "false" && test "$erl_xcomp_sysroot" != ""; then
-	dnl We should perhaps give up if we have'nt found it by now, but at
-	dnl least in one Tilera MDE `getconf' under sysroot is a bourne
-	dnl shell script which we can use. We try to find `<HOST>-getconf'
-    	dnl or `getconf' under sysconf, but only under sysconf since
-	dnl `getconf' in $PATH is almost guaranteed to be for the build
-	dnl machine.
-	GETCONF=
-	prfx="$erl_xcomp_sysroot"
-        AC_PATH_TOOL([GETCONF], [getconf], [false],
-	             ["$prfx/usr/bin:$prfx/bin:$prfx/usr/local/bin"])
-    fi
-fi
-])
-
-dnl ----------------------------------------------------------------------
-dnl
-dnl LM_WINDOWS_ENVIRONMENT
-dnl
-dnl
-dnl Tries to determine thw windows build environment, i.e. 
-dnl MIXED_CYGWIN_VC or MIXED_MSYS_VC 
-dnl
-
-AC_DEFUN(LM_WINDOWS_ENVIRONMENT,
-[
-MIXED_CYGWIN=no
-MIXED_MSYS=no
-
-AC_MSG_CHECKING(for mixed cygwin or msys and native VC++ environment)
-if test "X$host" = "Xwin32" -a "x$GCC" != "xyes"; then
-	if test -x /usr/bin/cygpath; then
-		CFLAGS="-O2"
-		MIXED_CYGWIN=yes
-		AC_MSG_RESULT([Cygwin and VC])
-		MIXED_CYGWIN_VC=yes
-		CPPFLAGS="$CPPFLAGS -DERTS_MIXED_CYGWIN_VC"
-	elif test -x /usr/bin/msysinfo; then
-	        CFLAGS="-O2"
-		MIXED_MSYS=yes
-		AC_MSG_RESULT([MSYS and VC])
-		MIXED_MSYS_VC=yes
-		CPPFLAGS="$CPPFLAGS -DERTS_MIXED_MSYS_VC"
-	else		    
-		AC_MSG_RESULT([undeterminable])
-		AC_MSG_ERROR(Seems to be mixed windows but not with cygwin, cannot handle this!)
-	fi
-else
-	AC_MSG_RESULT([no])
-	MIXED_CYGWIN_VC=no
-	MIXED_MSYS_VC=no
-fi
-AC_SUBST(MIXED_CYGWIN_VC)
-AC_SUBST(MIXED_MSYS_VC)
-
-MIXED_VC=no
-if test "x$MIXED_MSYS_VC" = "xyes" -o  "x$MIXED_CYGWIN_VC" = "xyes" ; then
-   MIXED_VC=yes
-fi
-
-AC_SUBST(MIXED_VC)
-
-if test "x$MIXED_MSYS" != "xyes"; then
-   AC_MSG_CHECKING(for mixed cygwin and native MinGW environment)
-   if test "X$host" = "Xwin32" -a "x$GCC" = x"yes"; then
-	if test -x /usr/bin/cygpath; then
-		CFLAGS="-O2"
-		MIXED_CYGWIN=yes
-		AC_MSG_RESULT([yes])
-		MIXED_CYGWIN_MINGW=yes
-		CPPFLAGS="$CPPFLAGS -DERTS_MIXED_CYGWIN_MINGW"
-	else
-		AC_MSG_RESULT([undeterminable])
-		AC_MSG_ERROR(Seems to be mixed windows but not with cygwin, cannot handle this!)
-	fi
-    else
-	AC_MSG_RESULT([no])
-	MIXED_CYGWIN_MINGW=no
-    fi
-else
-	MIXED_CYGWIN_MINGW=no
-fi	
-AC_SUBST(MIXED_CYGWIN_MINGW)
-
-AC_MSG_CHECKING(if we mix cygwin with any native compiler)
-if test "X$MIXED_CYGWIN" = "Xyes"; then
-	AC_MSG_RESULT([yes])	
-else
-	AC_MSG_RESULT([no])
-fi
-
-AC_SUBST(MIXED_CYGWIN)
-	
-AC_MSG_CHECKING(if we mix msys with another native compiler)
-if test "X$MIXED_MSYS" = "Xyes" ; then
-	AC_MSG_RESULT([yes])	
-else
-	AC_MSG_RESULT([no])
-fi
-
-AC_SUBST(MIXED_MSYS)
-])		
-	
-dnl ----------------------------------------------------------------------
-dnl
-dnl LM_FIND_EMU_CC
-dnl
-dnl
-dnl Tries fairly hard to find a C compiler that can handle jump tables.
-dnl Defines the @EMU_CC@ variable for the makefiles and 
-dnl inserts NO_JUMP_TABLE in the header if one cannot be found...
-dnl
-
-AC_DEFUN(LM_FIND_EMU_CC,
-	[AC_CACHE_CHECK(for a compiler that handles jumptables,
-			ac_cv_prog_emu_cc,
-			[
-AC_TRY_COMPILE([],[
-#if defined(__clang_major__) && __clang_major__ >= 3
-    /* clang 3.x or later is fine */
-#elif defined(__llvm__)
-#error "this version of llvm is unable to correctly compile beam_emu.c"
-#endif
-    __label__ lbl1;
-    __label__ lbl2;
-    int x = magic();
-    static void *jtab[2];
-
-    jtab[0] = &&lbl1;
-    jtab[1] = &&lbl2;
-    goto *jtab[x];
-lbl1:
-    return 1;
-lbl2:
-    return 2;
-],ac_cv_prog_emu_cc=$CC,ac_cv_prog_emu_cc=no)
-
-if test $ac_cv_prog_emu_cc = no; then
-	for ac_progname in emu_cc.sh gcc-4.2 gcc; do
-  		IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS=":"
-  		ac_dummy="$PATH"
-  		for ac_dir in $ac_dummy; do
-    			test -z "$ac_dir" && ac_dir=.
-    			if test -f $ac_dir/$ac_progname; then
-      				ac_cv_prog_emu_cc=$ac_dir/$ac_progname
-      				break
-    			fi
-  		done
-  		IFS="$ac_save_ifs"
-		if test $ac_cv_prog_emu_cc != no; then
-			break
-		fi
-	done
-fi
-
-if test $ac_cv_prog_emu_cc != no; then
-	save_CC=$CC
-	save_CFLAGS=$CFLAGS
-	save_CPPFLAGS=$CPPFLAGS
-	CC=$ac_cv_prog_emu_cc
-	CFLAGS=""
-	CPPFLAGS=""
-	AC_TRY_COMPILE([],[
-#if defined(__clang_major__) && __clang_major__ >= 3
-    /* clang 3.x or later is fine */
-#elif defined(__llvm__)
-#error "this version of llvm is unable to correctly compile beam_emu.c"
-#endif
-    	__label__ lbl1;
-    	__label__ lbl2;
-    	int x = magic();
-    	static void *jtab[2];
-
-    	jtab[0] = &&lbl1;
-    	jtab[1] = &&lbl2;
-    	goto *jtab[x];
-	lbl1:
-    	return 1;
-	lbl2:
-    	return 2;
-	],ac_cv_prog_emu_cc=$CC,ac_cv_prog_emu_cc=no)
-	CC=$save_CC
-	CFLAGS=$save_CFLAGS
-	CPPFLAGS=$save_CPPFLAGS
-fi
-])
-if test $ac_cv_prog_emu_cc = no; then
-	AC_DEFINE(NO_JUMP_TABLE,[],[Defined if no found C compiler can handle jump tables])
-	EMU_CC=$CC
-else
-	EMU_CC=$ac_cv_prog_emu_cc
-fi
-AC_SUBST(EMU_CC)
-])		
-			
-
-
-dnl ----------------------------------------------------------------------
-dnl
-dnl LM_PROG_INSTALL_DIR
-dnl
-dnl This macro may be used by any OTP application.
-dnl
-dnl Figure out how to create directories with parents.
-dnl (In my opinion INSTALL_DIR is a bad name, MKSUBDIRS or something is better)
-dnl
-dnl We prefer 'install -d', but use 'mkdir -p' if it exists.
-dnl If none of these methods works, we give up.
-dnl
-
-
-AC_DEFUN(LM_PROG_INSTALL_DIR,
-[AC_CACHE_CHECK(how to create a directory including parents,
-ac_cv_prog_mkdir_p,
-[
-temp_name_base=config.$$
-temp_name=$temp_name_base/x/y/z
-$INSTALL -d $temp_name >/dev/null 2>&1
-ac_cv_prog_mkdir_p=none
-if test -d $temp_name; then
-        ac_cv_prog_mkdir_p="$INSTALL -d"
-else
-        mkdir -p $temp_name >/dev/null 2>&1
-        if test -d $temp_name; then
-                ac_cv_prog_mkdir_p="mkdir -p"
-        fi
-fi
-rm -fr $temp_name_base           
-])
-
-case "${ac_cv_prog_mkdir_p}" in
-  none) AC_MSG_ERROR(don't know how create directories with parents) ;;
-  *)    INSTALL_DIR="$ac_cv_prog_mkdir_p" AC_SUBST(INSTALL_DIR)     ;;
-esac
-])
-
-
-dnl ----------------------------------------------------------------------
-dnl
-dnl LM_PROG_PERL5
-dnl
-dnl Try to find perl version 5. If found set PERL to the absolute path
-dnl of the program, if not found set PERL to false.
-dnl
-dnl On some systems /usr/bin/perl is perl 4 and e.g.
-dnl /usr/local/bin/perl is perl 5. We try to handle this case by
-dnl putting a couple of 
-dnl Tries to handle the case that there are two programs called perl
-dnl in the path and one of them is perl 5 and the other isn't. 
-dnl
-AC_DEFUN(LM_PROG_PERL5,
-[AC_PATH_PROGS(PERL, perl5 perl, false,
-   /usr/local/bin:/opt/local/bin:/usr/local/gnu/bin:${PATH})
-changequote(, )dnl
-dnl[ That bracket is needed to balance the right bracket below
-if test "$PERL" = "false" || $PERL -e 'exit ($] >= 5)'; then
-changequote([, ])dnl
-  ac_cv_path_PERL=false
-  PERL=false
-dnl  AC_MSG_WARN(perl version 5 not found)
-fi
-])dnl
-
-
-dnl ----------------------------------------------------------------------
-dnl
-dnl LM_DECL_SO_BSDCOMPAT
-dnl
-dnl Check if the system has the SO_BSDCOMPAT flag on sockets (linux) 
-dnl
-AC_DEFUN(LM_DECL_SO_BSDCOMPAT,
-[AC_CACHE_CHECK([for SO_BSDCOMPAT declaration], ac_cv_decl_so_bsdcompat,
-AC_TRY_COMPILE([#include <sys/socket.h>], [int i = SO_BSDCOMPAT;],
-               ac_cv_decl_so_bsdcompat=yes,
-               ac_cv_decl_so_bsdcompat=no))
-
-case "${ac_cv_decl_so_bsdcompat}" in
-  "yes" ) AC_DEFINE(HAVE_SO_BSDCOMPAT,[],
-		[Define if you have SO_BSDCOMPAT flag on sockets]) ;;
-  * ) ;;
-esac
-])
-
-
-dnl ----------------------------------------------------------------------
-dnl
-dnl LM_DECL_INADDR_LOOPBACK
-dnl
-dnl Try to find declaration of INADDR_LOOPBACK, if nowhere provide a default
-dnl
-
-AC_DEFUN(LM_DECL_INADDR_LOOPBACK,
-[AC_CACHE_CHECK([for INADDR_LOOPBACK in netinet/in.h],
- ac_cv_decl_inaddr_loopback,
-[AC_TRY_COMPILE([#include <sys/types.h>
-#include <netinet/in.h>], [int i = INADDR_LOOPBACK;],
-ac_cv_decl_inaddr_loopback=yes, ac_cv_decl_inaddr_loopback=no)
-])
-
-if test ${ac_cv_decl_inaddr_loopback} = no; then
-  AC_CACHE_CHECK([for INADDR_LOOPBACK in rpc/types.h],
-                   ac_cv_decl_inaddr_loopback_rpc,
-                   AC_TRY_COMPILE([#include <rpc/types.h>],
-                                   [int i = INADDR_LOOPBACK;],
-                                   ac_cv_decl_inaddr_loopback_rpc=yes,
-                                   ac_cv_decl_inaddr_loopback_rpc=no))
-
-   case "${ac_cv_decl_inaddr_loopback_rpc}" in
-     "yes" )
-        AC_DEFINE(DEF_INADDR_LOOPBACK_IN_RPC_TYPES_H,[],
-		[Define if you need to include rpc/types.h to get INADDR_LOOPBACK defined]) ;;
-      * )
-  	AC_CACHE_CHECK([for INADDR_LOOPBACK in winsock2.h],
-                   ac_cv_decl_inaddr_loopback_winsock2,
-                   AC_TRY_COMPILE([#define WIN32_LEAN_AND_MEAN
-				   #include <winsock2.h>],
-                                   [int i = INADDR_LOOPBACK;],
-                                   ac_cv_decl_inaddr_loopback_winsock2=yes,
-                                   ac_cv_decl_inaddr_loopback_winsock2=no))
-	case "${ac_cv_decl_inaddr_loopback_winsock2}" in
-     		"yes" )
-			AC_DEFINE(DEF_INADDR_LOOPBACK_IN_WINSOCK2_H,[],
-				[Define if you need to include winsock2.h to get INADDR_LOOPBACK defined]) ;;
-		* )
-			# couldn't find it anywhere
-        		AC_DEFINE(HAVE_NO_INADDR_LOOPBACK,[],
-				[Define if you don't have a definition of INADDR_LOOPBACK]) ;;
-	esac;;
-   esac
-fi
-])
-
-
-dnl ----------------------------------------------------------------------
-dnl
-dnl LM_STRUCT_SOCKADDR_SA_LEN
-dnl
-dnl Check if the sockaddr structure has the field sa_len
-dnl
-
-AC_DEFUN(LM_STRUCT_SOCKADDR_SA_LEN,
-[AC_CACHE_CHECK([whether struct sockaddr has sa_len field],
-                ac_cv_struct_sockaddr_sa_len,
-AC_TRY_COMPILE([#include <sys/types.h>
-#include <sys/socket.h>], [struct sockaddr s; s.sa_len = 10;],
-  ac_cv_struct_sockaddr_sa_len=yes, ac_cv_struct_sockaddr_sa_len=no))
-
-dnl FIXME convbreak
-case ${ac_cv_struct_sockaddr_sa_len} in
-  "no" ) AC_DEFINE(NO_SA_LEN,[1],[Define if you dont have salen]) ;;
-  *) ;;
-esac
-])
-
-dnl ----------------------------------------------------------------------
-dnl
-dnl LM_STRUCT_EXCEPTION
-dnl
-dnl Check to see whether the system supports the matherr function
-dnl and its associated type "struct exception".
-dnl
-
-AC_DEFUN(LM_STRUCT_EXCEPTION,
-[AC_CACHE_CHECK([for struct exception (and matherr function)],
- ac_cv_struct_exception,
-AC_TRY_COMPILE([#include <math.h>],
-  [struct exception x; x.type = DOMAIN; x.type = SING;],
-  ac_cv_struct_exception=yes, ac_cv_struct_exception=no))
-
-case "${ac_cv_struct_exception}" in
-  "yes" ) AC_DEFINE(USE_MATHERR,[1],[Define if you have matherr() function and struct exception type]) ;;
-  *  ) ;;
-esac
-])
-
-
-dnl ----------------------------------------------------------------------
-dnl
-dnl LM_SYS_IPV6
-dnl
-dnl Check for ipv6 support and what the in6_addr structure is called.
-dnl (early linux used in_addr6 insted of in6_addr)
-dnl
-
-AC_DEFUN(LM_SYS_IPV6,
-[AC_MSG_CHECKING(for IP version 6 support)
-AC_CACHE_VAL(ac_cv_sys_ipv6_support,
-[ok_so_far=yes
- AC_TRY_COMPILE([#include <sys/types.h>
-#ifdef __WIN32__
-#include <winsock2.h>
-#include <ws2tcpip.h>
-#elif __OSE__
-#error "no ipv6"
-#else
-#include <netinet/in.h>
-#endif],
-   [struct in6_addr a6; struct sockaddr_in6 s6;], ok_so_far=yes, ok_so_far=no)
-
-if test $ok_so_far = yes; then
-  ac_cv_sys_ipv6_support=yes
-else
-  AC_TRY_COMPILE([#include <sys/types.h>
-#ifdef __WIN32__
-#include <winsock2.h>
-#include <ws2tcpip.h>
-#elif __OSE__
-#error "no ipv6"
-#else
-#include <netinet/in.h>
-#endif],
-    [struct in_addr6 a6; struct sockaddr_in6 s6;],
-    ac_cv_sys_ipv6_support=in_addr6, ac_cv_sys_ipv6_support=no)
-fi
-])dnl
-
-dnl
-dnl Have to use old style AC_DEFINE due to BC with old autoconf.
-dnl
-
-case ${ac_cv_sys_ipv6_support} in
-  yes)
-    AC_MSG_RESULT(yes)
-    AC_DEFINE(HAVE_IN6,[1],[Define if ipv6 is present])
-    ;;
-  in_addr6)
-    AC_MSG_RESULT([yes (but I am redefining in_addr6 to in6_addr)])
-    AC_DEFINE(HAVE_IN6,[1],[Define if ipv6 is present])
-    AC_DEFINE(HAVE_IN_ADDR6_STRUCT,[],[Early linux used in_addr6 instead of in6_addr, define if you have this])
-    ;;
-  *)
-    AC_MSG_RESULT(no)
-    ;;
-esac
-])
-
-
-dnl ----------------------------------------------------------------------
-dnl
-dnl LM_SYS_MULTICAST
-dnl
-dnl Check for multicast support. Only checks for multicast options in
-dnl setsockopt(), no check is performed that multicasting actually works.
-dnl If options are found defines HAVE_MULTICAST_SUPPORT
-dnl
-
-AC_DEFUN(LM_SYS_MULTICAST,
-[AC_CACHE_CHECK([for multicast support], ac_cv_sys_multicast_support,
-[AC_EGREP_CPP(yes,
-[#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#if defined(IP_MULTICAST_TTL) && defined(IP_MULTICAST_LOOP) && defined(IP_MULTICAST_IF) && defined(IP_ADD_MEMBERSHIP) && defined(IP_DROP_MEMBERSHIP)
-yes
-#endif
-], ac_cv_sys_multicast_support=yes, ac_cv_sys_multicast_support=no)])
-if test $ac_cv_sys_multicast_support = yes; then
-  AC_DEFINE(HAVE_MULTICAST_SUPPORT,[1],
-	[Define if setsockopt() accepts multicast options])
-fi
-])dnl
-
-
-dnl ----------------------------------------------------------------------
-dnl
-dnl LM_DECL_SYS_ERRLIST
-dnl
-dnl Define SYS_ERRLIST_DECLARED if the variable sys_errlist is declared
-dnl in a system header file, stdio.h or errno.h.
-dnl
-
-AC_DEFUN(LM_DECL_SYS_ERRLIST,
-[AC_CACHE_CHECK([for sys_errlist declaration in stdio.h or errno.h],
-  ac_cv_decl_sys_errlist,
-[AC_TRY_COMPILE([#include <stdio.h>
-#include <errno.h>], [char *msg = *(sys_errlist + 1);],
-  ac_cv_decl_sys_errlist=yes, ac_cv_decl_sys_errlist=no)])
-if test $ac_cv_decl_sys_errlist = yes; then
-  AC_DEFINE(SYS_ERRLIST_DECLARED,[],
-	[define if the variable sys_errlist is declared in a system header file])
-fi
-])
-
-
-dnl ----------------------------------------------------------------------
-dnl
-dnl LM_CHECK_FUNC_DECL( funname, declaration [, extra includes 
-dnl                     [, action-if-found [, action-if-not-found]]] )
-dnl
-dnl Checks if the declaration "declaration" of "funname" conflicts
-dnl with the header files idea of how the function should be
-dnl declared. It is useful on systems which lack prototypes and you
-dnl need to provide your own (e.g. when you want to take the address
-dnl of a function). The 4'th argument is expanded if conflicting, 
-dnl the 5'th argument otherwise
-dnl
-dnl
-
-AC_DEFUN(LM_CHECK_FUNC_DECL,
-[AC_MSG_CHECKING([for conflicting declaration of $1])
-AC_CACHE_VAL(ac_cv_func_decl_$1,
-[AC_TRY_COMPILE([#include <stdio.h>
-$3],[$2
-char *c = (char *)$1;
-], eval "ac_cv_func_decl_$1=no", eval "ac_cv_func_decl_$1=yes")])
-if eval "test \"`echo '$ac_cv_func_decl_'$1`\" = yes"; then
-  AC_MSG_RESULT(yes)
-  ifelse([$4], , :, [$4])
-else
-  AC_MSG_RESULT(no)
-ifelse([$5], , , [$5
-])dnl
-fi
-])
-
-dnl ----------------------------------------------------------------------
-dnl
-dnl AC_DOUBLE_MIDDLE_ENDIAN
-dnl
-dnl Checks whether doubles are represented in "middle-endian" format.
-dnl Sets ac_cv_double_middle_endian={no,yes,unknown} accordingly,
-dnl as well as DOUBLE_MIDDLE_ENDIAN.
-dnl
-dnl
-
-AC_DEFUN([AC_C_DOUBLE_MIDDLE_ENDIAN],
-[AC_CACHE_CHECK(whether double word ordering is middle-endian, ac_cv_c_double_middle_endian,
-[# It does not; compile a test program.
-AC_RUN_IFELSE(
-[AC_LANG_SOURCE([[#include <stdlib.h>
-
-int
-main(void)
-{
-  int i = 0;
-  int zero = 0;
-  int bigendian;
-  int zero_index = 0;
-
-  union
-  {
-    long int l;
-    char c[sizeof (long int)];
-  } u;
-
-  /* we'll use the one with 32-bit words */
-  union
-  {
-    double d;
-    unsigned int c[2];
-  } vint;
-
-  union
-  {
-    double d;
-    unsigned long c[2];
-  } vlong;
-
-  union
-  {
-    double d;
-    unsigned short c[2];
-  } vshort;
-
-
-  /* Are we little or big endian?  From Harbison&Steele.  */
-  u.l = 1;
-  bigendian = (u.c[sizeof (long int) - 1] == 1);
-
-  zero_index = bigendian ? 1 : 0;
-
-  vint.d = 1.0;
-  vlong.d = 1.0;
-  vshort.d = 1.0;
-
-  if (sizeof(unsigned int) == 4)
-    {
-      if (vint.c[zero_index] != 0)
-	zero = 1;
-    }
-  else if (sizeof(unsigned long) == 4)
-    {
-      if (vlong.c[zero_index] != 0)
-	zero = 1;
-    }
-  else if (sizeof(unsigned short) == 4)
-    {
-      if (vshort.c[zero_index] != 0)
-	zero = 1;
-    }
-
-  exit (zero);
-}
-]])],
-	      [ac_cv_c_double_middle_endian=no],
-	      [ac_cv_c_double_middle_endian=yes],
-	      [ac_cv_c_double_middle=unknown])])
-case $ac_cv_c_double_middle_endian in
-  yes)
-    m4_default([$1],
-      [AC_DEFINE([DOUBLE_MIDDLE_ENDIAN], 1,
-	[Define to 1 if your processor stores the words in a double in
-	 middle-endian format (like some ARMs).])]) ;;
-  no)
-    $2 ;;
-  *)
-    m4_default([$3],
-      [AC_MSG_WARN([unknown double endianness
-presetting ac_cv_c_double_middle_endian=no (or yes) will help])]) ;;
-esac
-])# AC_C_DOUBLE_MIDDLE_ENDIAN
-
-
-dnl ----------------------------------------------------------------------
-dnl
-dnl LM_CHECK_THR_LIB
-dnl
-dnl This macro may be used by any OTP application.
-dnl
-dnl LM_CHECK_THR_LIB sets THR_LIBS, THR_DEFS, and THR_LIB_NAME. It also
-dnl checks for some pthread headers which will appear in DEFS or config.h.
-dnl
-
-AC_DEFUN(LM_CHECK_THR_LIB,
-[
-
-NEED_NPTL_PTHREAD_H=no
-
-dnl win32?
-AC_MSG_CHECKING([for native win32 threads])
-if test "X$host_os" = "Xwin32"; then
-    AC_MSG_RESULT(yes)
-    THR_DEFS="-DWIN32_THREADS"
-    THR_LIBS=
-    THR_LIB_NAME=win32_threads
-    THR_LIB_TYPE=win32_threads
-elif test "X$host_os" = "Xose"; then
-    AC_MSG_RESULT(yes)
-    THR_DEFS="-DOSE_THREADS"
-    THR_LIBS=
-    THR_LIB_NAME=ose_threads
-    THR_LIB_TYPE=ose_threads
-else
-    AC_MSG_RESULT(no)
-    THR_DEFS=
-    THR_LIBS=
-    THR_LIB_NAME=
-    THR_LIB_TYPE=posix_unknown
-
-dnl Try to find POSIX threads
-
-dnl The usual pthread lib...
-    AC_CHECK_LIB(pthread, pthread_create, THR_LIBS="-lpthread")
-
-dnl Very old versions of FreeBSD have pthreads in special c library, c_r...
-    if test "x$THR_LIBS" = "x"; then
-	AC_CHECK_LIB(c_r, pthread_create, THR_LIBS="-lc_r")
-    fi
-
-dnl QNX has pthreads in standard C library
-    if test "x$THR_LIBS" = "x"; then
-	AC_CHECK_FUNC(pthread_create, THR_LIBS="none_needed")
-    fi
-
-dnl On ofs1 the '-pthread' switch should be used
-    if test "x$THR_LIBS" = "x"; then
-	AC_MSG_CHECKING([if the '-pthread' switch can be used])
-	saved_cflags=$CFLAGS
-	CFLAGS="$CFLAGS -pthread"
-	AC_TRY_LINK([#include <pthread.h>],
-		    pthread_create((void*)0,(void*)0,(void*)0,(void*)0);,
-		    [THR_DEFS="-pthread"
-		     THR_LIBS="-pthread"])
-	CFLAGS=$saved_cflags
-	if test "x$THR_LIBS" != "x"; then
-	    AC_MSG_RESULT(yes)
-	else
-	    AC_MSG_RESULT(no)
-	fi
-    fi
-
-    if test "x$THR_LIBS" != "x"; then
-	THR_DEFS="$THR_DEFS -D_THREAD_SAFE -D_REENTRANT -DPOSIX_THREADS"
-	THR_LIB_NAME=pthread
-	if test "x$THR_LIBS" = "xnone_needed"; then
-	    THR_LIBS=
-	fi
-	case $host_os in
-	    solaris*)
-		THR_DEFS="$THR_DEFS -D_POSIX_PTHREAD_SEMANTICS" ;;
-	    linux*)
-		THR_DEFS="$THR_DEFS -D_POSIX_THREAD_SAFE_FUNCTIONS"
-
-		LM_CHECK_GETCONF
-		AC_MSG_CHECKING(for Native POSIX Thread Library)
-		libpthr_vsn=`$GETCONF GNU_LIBPTHREAD_VERSION 2>/dev/null`
-		if test $? -eq 0; then
-		    case "$libpthr_vsn" in
-			*nptl*|*NPTL*) nptl=yes;;
-			*) nptl=no;;
-		    esac
-		elif test "$cross_compiling" = "yes"; then
-		    case "$erl_xcomp_linux_nptl" in
-			"") nptl=cross;;
-			yes|no) nptl=$erl_xcomp_linux_nptl;;
-			*) AC_MSG_ERROR([Bad erl_xcomp_linux_nptl value: $erl_xcomp_linux_nptl]);;
-		    esac
-		else
-		    nptl=no
-		fi
-		AC_MSG_RESULT($nptl)
-		if test $nptl = cross; then
-		    nptl=yes
-		    AC_MSG_WARN([result yes guessed because of cross compilation])
-		fi
-		if test $nptl = yes; then
-		    THR_LIB_TYPE=posix_nptl
-		    need_nptl_incldir=no
-		    AC_CHECK_HEADER(nptl/pthread.h,
-				    [need_nptl_incldir=yes
-				     NEED_NPTL_PTHREAD_H=yes])
-		    if test $need_nptl_incldir = yes; then
-			# Ahh...
-			nptl_path="$C_INCLUDE_PATH:$CPATH"
-			if test X$cross_compiling != Xyes; then
-			    nptl_path="$nptl_path:/usr/local/include:/usr/include"
-			else
-			    IROOT="$erl_xcomp_isysroot"
-			    test "$IROOT" != "" || IROOT="$erl_xcomp_sysroot"
-			    test "$IROOT" != "" || AC_MSG_ERROR([Don't know where to search for includes! Please set erl_xcomp_isysroot])
-			    nptl_path="$nptl_path:$IROOT/usr/local/include:$IROOT/usr/include"
-			fi
-			nptl_ws_path=
-			save_ifs="$IFS"; IFS=":"
-			for dir in $nptl_path; do
-			    if test "x$dir" != "x"; then
-				nptl_ws_path="$nptl_ws_path $dir"
-			    fi
-			done
-			IFS=$save_ifs
-			nptl_incldir=
-			for dir in $nptl_ws_path; do
-		            AC_CHECK_HEADER($dir/nptl/pthread.h,
-					    nptl_incldir=$dir/nptl)
-			    if test "x$nptl_incldir" != "x"; then
-				THR_DEFS="$THR_DEFS -isystem $nptl_incldir"
-				break
-			    fi
-			done
-			if test "x$nptl_incldir" = "x"; then
-			    AC_MSG_ERROR(Failed to locate nptl system include directory)
-			fi
-		    fi
-		fi
-		;;
-	    *) ;;
-	esac
-
-	dnl We sometimes need THR_DEFS in order to find certain headers
-	dnl (at least for pthread.h on osf1).
-	saved_cppflags=$CPPFLAGS
-	CPPFLAGS="$CPPFLAGS $THR_DEFS"
-
-	dnl
-	dnl Check for headers
-	dnl
-
-	AC_CHECK_HEADER(pthread.h,
-			AC_DEFINE(HAVE_PTHREAD_H, 1, \
-[Define if you have the <pthread.h> header file.]))
-
-	dnl Some Linuxes have <pthread/mit/pthread.h> instead of <pthread.h>
-	AC_CHECK_HEADER(pthread/mit/pthread.h, \
-			AC_DEFINE(HAVE_MIT_PTHREAD_H, 1, \
-[Define if the pthread.h header file is in pthread/mit directory.]))
-
-	dnl restore CPPFLAGS
-	CPPFLAGS=$saved_cppflags
-
-    fi
-fi
-
-])
-
-AC_DEFUN(ERL_INTERNAL_LIBS,
-[
-
-ERTS_INTERNAL_X_LIBS=
-
-AC_CHECK_LIB(kstat, kstat_open,
-[AC_DEFINE(HAVE_KSTAT, 1, [Define if you have kstat])
-ERTS_INTERNAL_X_LIBS="$ERTS_INTERNAL_X_LIBS -lkstat"])
-
-AC_SUBST(ERTS_INTERNAL_X_LIBS)
-
-])
-
-AC_DEFUN(ETHR_CHK_SYNC_OP,
-[
-    AC_MSG_CHECKING([for $3-bit $1()])
-    case "$2" in
-	"1") sync_call="$1(&var);";;
-	"2") sync_call="$1(&var, ($4) 0);";;
-	"3") sync_call="$1(&var, ($4) 0, ($4) 0);";;
-    esac
-    have_sync_op=no
-    AC_TRY_LINK([],
-	[
-	    $4 res;
-	    volatile $4 var;
-	    res = $sync_call
-	],
-	[have_sync_op=yes])
-    test $have_sync_op = yes && $5
-    AC_MSG_RESULT([$have_sync_op])
-])
-
-AC_DEFUN(ETHR_CHK_INTERLOCKED,
-[
-    ilckd="$1"
-    AC_MSG_CHECKING([for ${ilckd}()])
-    case "$2" in
-	"1") ilckd_call="${ilckd}(var);";;
-	"2") ilckd_call="${ilckd}(var, ($3) 0);";;
-	"3") ilckd_call="${ilckd}(var, ($3) 0, ($3) 0);";;
-	"4") ilckd_call="${ilckd}(var, ($3) 0, ($3) 0, arr);";;
-    esac
-    have_interlocked_op=no
-    AC_TRY_LINK(
-	[
-	#define WIN32_LEAN_AND_MEAN
-	#include <windows.h>
-	#include <intrin.h>
-	],
-	[
-	    volatile $3 *var;
-	    volatile $3 arr[2];
-
-	    $ilckd_call
-	    return 0;
-	],
-	[have_interlocked_op=yes])
-    test $have_interlocked_op = yes && $4
-    AC_MSG_RESULT([$have_interlocked_op])
-])
-
-dnl ----------------------------------------------------------------------
-dnl
-dnl ERL_FIND_ETHR_LIB
-dnl
-dnl NOTE! This macro may be changed at any time! Should *only* be used by
-dnl       ERTS!
-dnl
-dnl Find a thread library to use. Sets ETHR_LIBS to libraries to link
-dnl with, ETHR_X_LIBS to extra libraries to link with (same as ETHR_LIBS
-dnl except that the ethread lib itself is not included), ETHR_DEFS to
-dnl defines to compile with, ETHR_THR_LIB_BASE to the name of the
-dnl thread library which the ethread library is based on, and ETHR_LIB_NAME
-dnl to the name of the library where the ethread implementation is located.
-dnl  ERL_FIND_ETHR_LIB currently searches for 'pthreads', and
-dnl 'win32_threads'. If no thread library was found ETHR_LIBS, ETHR_X_LIBS,
-dnl ETHR_DEFS, ETHR_THR_LIB_BASE, and ETHR_LIB_NAME are all set to the
-dnl empty string.
-dnl
-
-AC_DEFUN(ERL_FIND_ETHR_LIB,
-[
-
-AC_ARG_ENABLE(native-ethr-impls,
-	      AS_HELP_STRING([--disable-native-ethr-impls],
-                             [disable native ethread implementations]),
-[ case "$enableval" in
-    no) disable_native_ethr_impls=yes ;;
-    *)  disable_native_ethr_impls=no ;;
-  esac ], disable_native_ethr_impls=no)
-
-test "X$disable_native_ethr_impls" = "Xyes" &&
-  AC_DEFINE(ETHR_DISABLE_NATIVE_IMPLS, 1, [Define if you want to disable native ethread implementations])
-
-AC_ARG_ENABLE(x86-out-of-order,
-	      AS_HELP_STRING([--enable-x86-out-of-order],
-                             [enable x86/x84_64 out of order support (default disabled)]))
-
-AC_ARG_ENABLE(prefer-gcc-native-ethr-impls,
-	      AS_HELP_STRING([--enable-prefer-gcc-native-ethr-impls],
-			     [prefer gcc native ethread implementations]),
-[ case "$enableval" in
-    yes) enable_prefer_gcc_native_ethr_impls=yes ;;
-    *)  enable_prefer_gcc_native_ethr_impls=no ;;
-  esac ], enable_prefer_gcc_native_ethr_impls=no)
-
-test $enable_prefer_gcc_native_ethr_impls = yes &&
-  AC_DEFINE(ETHR_PREFER_GCC_NATIVE_IMPLS, 1, [Define if you prefer gcc native ethread implementations])
-
-AC_ARG_WITH(libatomic_ops,
-	    AS_HELP_STRING([--with-libatomic_ops=PATH],
-			   [specify and prefer usage of libatomic_ops in the ethread library]))
-
-AC_ARG_WITH(with_sparc_memory_order,
-	    AS_HELP_STRING([--with-sparc-memory-order=TSO|PSO|RMO],
-			   [specify sparc memory order (defaults to RMO)]))
-
-LM_CHECK_THR_LIB
-ERL_INTERNAL_LIBS
-
-ethr_have_native_atomics=no
-ethr_have_native_spinlock=no
-ETHR_THR_LIB_BASE="$THR_LIB_NAME"
-ETHR_THR_LIB_BASE_TYPE="$THR_LIB_TYPE"
-ETHR_DEFS="$THR_DEFS"
-ETHR_X_LIBS="$THR_LIBS $ERTS_INTERNAL_X_LIBS"
-ETHR_LIBS=
-ETHR_LIB_NAME=
-
-ethr_modified_default_stack_size=
-
-dnl Name of lib where ethread implementation is located
-ethr_lib_name=ethread
-
-case "$THR_LIB_NAME" in
-
-    win32_threads)
-	ETHR_THR_LIB_BASE_DIR=win
-	# * _WIN32_WINNT >= 0x0400 is needed for
-	#   TryEnterCriticalSection
-	# * _WIN32_WINNT >= 0x0403 is needed for
-	#   InitializeCriticalSectionAndSpinCount
-	# The ethread lib will refuse to build if _WIN32_WINNT < 0x0403.
-	#
-	# -D_WIN32_WINNT should have been defined in $CPPFLAGS; fetch it
-	# and save it in ETHR_DEFS.
-	found_win32_winnt=no
-	for cppflag in $CPPFLAGS; do
-	    case $cppflag in
-		-DWINVER*)
-		    ETHR_DEFS="$ETHR_DEFS $cppflag"
-		    ;;
-		-D_WIN32_WINNT*)
-		    ETHR_DEFS="$ETHR_DEFS $cppflag"
-		    found_win32_winnt=yes
-		    ;;
-		*)
-		    ;;
-	    esac
-        done
-        if test $found_win32_winnt = no; then
-	    AC_MSG_ERROR([-D_WIN32_WINNT missing in CPPFLAGS])
-        fi
-
-	AC_DEFINE(ETHR_WIN32_THREADS, 1, [Define if you have win32 threads])
-
-	if test "X$disable_native_ethr_impls" = "Xyes"; then
-	    have_interlocked_op=no
-	    ethr_have_native_atomics=no
-	else
-	    ETHR_CHK_INTERLOCKED([_InterlockedDecrement], [1], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDDECREMENT, 1, [Define if you have _InterlockedDecrement()]))
-	    ETHR_CHK_INTERLOCKED([_InterlockedDecrement_rel], [1], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDDECREMENT_REL, 1, [Define if you have _InterlockedDecrement_rel()]))
-	    ETHR_CHK_INTERLOCKED([_InterlockedIncrement], [1], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDINCREMENT, 1, [Define if you have _InterlockedIncrement()]))
-	    ETHR_CHK_INTERLOCKED([_InterlockedIncrement_acq], [1], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDINCREMENT_ACQ, 1, [Define if you have _InterlockedIncrement_acq()]))
-	    ETHR_CHK_INTERLOCKED([_InterlockedExchangeAdd], [2], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGEADD, 1, [Define if you have _InterlockedExchangeAdd()]))
-	    ETHR_CHK_INTERLOCKED([_InterlockedExchangeAdd_acq], [2], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGEADD_ACQ, 1, [Define if you have _InterlockedExchangeAdd_acq()]))
-	    ETHR_CHK_INTERLOCKED([_InterlockedAnd], [2], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDAND, 1, [Define if you have _InterlockedAnd()]))
-	    ETHR_CHK_INTERLOCKED([_InterlockedOr], [2], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDOR, 1, [Define if you have _InterlockedOr()]))
-	    ETHR_CHK_INTERLOCKED([_InterlockedExchange], [2], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGE, 1, [Define if you have _InterlockedExchange()]))
-	    ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange], [3], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE, 1, [Define if you have _InterlockedCompareExchange()]))
-	    test "$have_interlocked_op" = "yes" && ethr_have_native_atomics=yes
-	    ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange_acq], [3], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE_ACQ, 1, [Define if you have _InterlockedCompareExchange_acq()]))
-	    test "$have_interlocked_op" = "yes" && ethr_have_native_atomics=yes
-	    ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange_rel], [3], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE_REL, 1, [Define if you have _InterlockedCompareExchange_rel()]))
-	    test "$have_interlocked_op" = "yes" && ethr_have_native_atomics=yes
-
-	    ETHR_CHK_INTERLOCKED([_InterlockedDecrement64], [1], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDDECREMENT64, 1, [Define if you have _InterlockedDecrement64()]))
-	    ETHR_CHK_INTERLOCKED([_InterlockedDecrement64_rel], [1], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDDECREMENT64_REL, 1, [Define if you have _InterlockedDecrement64_rel()]))
-	    ETHR_CHK_INTERLOCKED([_InterlockedIncrement64], [1], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDINCREMENT64, 1, [Define if you have _InterlockedIncrement64()]))
-	    ETHR_CHK_INTERLOCKED([_InterlockedIncrement64_acq], [1], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDINCREMENT64_ACQ, 1, [Define if you have _InterlockedIncrement64_acq()]))
-	    ETHR_CHK_INTERLOCKED([_InterlockedExchangeAdd64], [2], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGEADD64, 1, [Define if you have _InterlockedExchangeAdd64()]))
-	    ETHR_CHK_INTERLOCKED([_InterlockedExchangeAdd64_acq], [2], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGEADD64_ACQ, 1, [Define if you have _InterlockedExchangeAdd64_acq()]))
-	    ETHR_CHK_INTERLOCKED([_InterlockedAnd64], [2], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDAND64, 1, [Define if you have _InterlockedAnd64()]))
-	    ETHR_CHK_INTERLOCKED([_InterlockedOr64], [2], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDOR64, 1, [Define if you have _InterlockedOr64()]))
-	    ETHR_CHK_INTERLOCKED([_InterlockedExchange64], [2], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGE64, 1, [Define if you have _InterlockedExchange64()]))
-	    ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange64], [3], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE64, 1, [Define if you have _InterlockedCompareExchange64()]))
-	    test "$have_interlocked_op" = "yes" && ethr_have_native_atomics=yes
-	    ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange64_acq], [3], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE64_ACQ, 1, [Define if you have _InterlockedCompareExchange64_acq()]))
-	    test "$have_interlocked_op" = "yes" && ethr_have_native_atomics=yes
-	    ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange64_rel], [3], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE64_REL, 1, [Define if you have _InterlockedCompareExchange64_rel()]))
-	    test "$have_interlocked_op" = "yes" && ethr_have_native_atomics=yes
-
-	    ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange128], [4], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE128, 1, [Define if you have _InterlockedCompareExchange128()]))
-	fi
-	test "$ethr_have_native_atomics" = "yes" && ethr_have_native_spinlock=yes
-	;;
-
-    pthread|ose_threads)
-        case "$THR_LIB_NAME" in
-	     pthread)
-		ETHR_THR_LIB_BASE_DIR=pthread
-		AC_DEFINE(ETHR_PTHREADS, 1, [Define if you have pthreads])
-		;;
-	     ose_threads)
-		AC_DEFINE(ETHR_OSE_THREADS, 1,
-		   [Define if you have OSE style threads])
-		ETHR_THR_LIB_BASE_DIR=ose
-		AC_CHECK_HEADER(ose_spi/ose_spi.h,
-		  AC_DEFINE(HAVE_OSE_SPI_H, 1,
-		    [Define if you have the "ose_spi/ose_spi.h" header file.]))
-		;;
-	esac
-	if test "x$THR_LIB_NAME" = "xpthread"; then
-	case $host_os in
-	    openbsd*)
-		# The default stack size is insufficient for our needs
-		# on OpenBSD. We increase it to 256 kilo words.
-		ethr_modified_default_stack_size=256;;
-	    linux*)
-		ETHR_DEFS="$ETHR_DEFS -D_GNU_SOURCE"
-
-		if test	X$cross_compiling = Xyes; then
-		    case X$erl_xcomp_linux_usable_sigusrx in
-			X) usable_sigusrx=cross;;
-			Xyes|Xno) usable_sigusrx=$erl_xcomp_linux_usable_sigusrx;;
-			*) AC_MSG_ERROR([Bad erl_xcomp_linux_usable_sigusrx value: $erl_xcomp_linux_usable_sigusrx]);;
-		    esac
-		    case X$erl_xcomp_linux_usable_sigaltstack in
-			X) usable_sigaltstack=cross;;
-			Xyes|Xno) usable_sigaltstack=$erl_xcomp_linux_usable_sigaltstack;;
-			*) AC_MSG_ERROR([Bad erl_xcomp_linux_usable_sigaltstack value: $erl_xcomp_linux_usable_sigaltstack]);;
-		    esac
-		else
-		    # FIXME: Test for actual problems instead of kernel versions
-		    linux_kernel_vsn_=`uname -r`
-		    case $linux_kernel_vsn_ in
-			[[0-1]].*|2.[[0-1]]|2.[[0-1]].*)
-			    usable_sigusrx=no
-			    usable_sigaltstack=no;;
-			2.[[2-3]]|2.[[2-3]].*)
-			    usable_sigusrx=yes
-			    usable_sigaltstack=no;;
-		    	*)
-			    usable_sigusrx=yes
-			    usable_sigaltstack=yes;;
-		    esac
-		fi
-
-		AC_MSG_CHECKING(if SIGUSR1 and SIGUSR2 can be used)
-		AC_MSG_RESULT($usable_sigusrx)
-		if test $usable_sigusrx = cross; then
-		    usable_sigusrx=yes
-		    AC_MSG_WARN([result yes guessed because of cross compilation])
-		fi
-		if test $usable_sigusrx = no; then
-		    ETHR_DEFS="$ETHR_DEFS -DETHR_UNUSABLE_SIGUSRX"
-		fi
-
-		AC_MSG_CHECKING(if sigaltstack can be used)
-		AC_MSG_RESULT($usable_sigaltstack)
-		if test $usable_sigaltstack = cross; then
-		    usable_sigaltstack=yes
-		    AC_MSG_WARN([result yes guessed because of cross compilation])
-		fi
-		if test $usable_sigaltstack = no; then
-		    ETHR_DEFS="$ETHR_DEFS -DETHR_UNUSABLE_SIGALTSTACK"
-		fi
-		;;
-	    *) ;;
-	esac
-
-	fi
-	dnl We sometimes need ETHR_DEFS in order to find certain headers
-	dnl (at least for pthread.h on osf1).
-	saved_cppflags="$CPPFLAGS"
-	CPPFLAGS="$CPPFLAGS $ETHR_DEFS"
-
-	dnl We need the thread library in order to find some functions
-	saved_libs="$LIBS"
-	LIBS="$LIBS $ETHR_X_LIBS"
-
-	dnl
-	dnl Check for headers
-	dnl
-	AC_CHECK_HEADER(pthread.h, \
-			AC_DEFINE(ETHR_HAVE_PTHREAD_H, 1, \
-[Define if you have the <pthread.h> header file.]))
-
-	dnl Some Linuxes have <pthread/mit/pthread.h> instead of <pthread.h>
-	AC_CHECK_HEADER(pthread/mit/pthread.h, \
-			AC_DEFINE(ETHR_HAVE_MIT_PTHREAD_H, 1, \
-[Define if the pthread.h header file is in pthread/mit directory.]))
-
-	if test $NEED_NPTL_PTHREAD_H = yes; then
-	    AC_DEFINE(ETHR_NEED_NPTL_PTHREAD_H, 1, \
-[Define if you need the <nptl/pthread.h> header file.])
-	fi
-
-	AC_CHECK_HEADER(sched.h, \
-			AC_DEFINE(ETHR_HAVE_SCHED_H, 1, \
-[Define if you have the <sched.h> header file.]))
-
-	AC_CHECK_HEADER(sys/time.h, \
-			AC_DEFINE(ETHR_HAVE_SYS_TIME_H, 1, \
-[Define if you have the <sys/time.h> header file.]))
-
-	AC_TRY_COMPILE([#include <time.h>
-			#include <sys/time.h>], 
-			[struct timeval *tv; return 0;],
-			AC_DEFINE(ETHR_TIME_WITH_SYS_TIME, 1, \
-[Define if you can safely include both <sys/time.h> and <time.h>.]))
-
-
-	dnl
-	dnl Check for functions
-	dnl
-	if test "x$THR_LIB_NAME" = "xpthread"; then
-	AC_CHECK_FUNC(pthread_spin_lock, \
-			[ethr_have_native_spinlock=yes \
-			 AC_DEFINE(ETHR_HAVE_PTHREAD_SPIN_LOCK, 1, \
-[Define if you have the pthread_spin_lock function.])])
-
-	have_sched_yield=no
-	have_librt_sched_yield=no
-	AC_CHECK_FUNC(sched_yield, [have_sched_yield=yes])
-	if test $have_sched_yield = no; then
-	    AC_CHECK_LIB(rt, sched_yield,
-			 [have_librt_sched_yield=yes
-			  ETHR_X_LIBS="$ETHR_X_LIBS -lrt"])
-	fi
-	if test $have_sched_yield = yes || test $have_librt_sched_yield = yes; then
-	    AC_DEFINE(ETHR_HAVE_SCHED_YIELD, 1, [Define if you have the sched_yield() function.])
-	    AC_MSG_CHECKING([whether sched_yield() returns an int])
-	    sched_yield_ret_int=no
-	    AC_TRY_COMPILE([
-				#ifdef ETHR_HAVE_SCHED_H
-				#include <sched.h>
-				#endif
-			   ],
-			   [int sched_yield();],
-			   [sched_yield_ret_int=yes])
-	    AC_MSG_RESULT([$sched_yield_ret_int])
-	    if test $sched_yield_ret_int = yes; then
-		AC_DEFINE(ETHR_SCHED_YIELD_RET_INT, 1, [Define if sched_yield() returns an int.])
-	    fi
-	fi
-
-	have_pthread_yield=no
-	AC_CHECK_FUNC(pthread_yield, [have_pthread_yield=yes])
-	if test $have_pthread_yield = yes; then
-	    AC_DEFINE(ETHR_HAVE_PTHREAD_YIELD, 1, [Define if you have the pthread_yield() function.])
-	    AC_MSG_CHECKING([whether pthread_yield() returns an int])
-	    pthread_yield_ret_int=no
-	    AC_TRY_COMPILE([
-				#if defined(ETHR_NEED_NPTL_PTHREAD_H)
-				#include <nptl/pthread.h>
-				#elif defined(ETHR_HAVE_MIT_PTHREAD_H)
-				#include <pthread/mit/pthread.h>
-				#elif defined(ETHR_HAVE_PTHREAD_H)
-				#include <pthread.h>
-				#endif
-			   ],
-			   [int pthread_yield();],
-			   [pthread_yield_ret_int=yes])
-	    AC_MSG_RESULT([$pthread_yield_ret_int])
-	    if test $pthread_yield_ret_int = yes; then
-		AC_DEFINE(ETHR_PTHREAD_YIELD_RET_INT, 1, [Define if pthread_yield() returns an int.])
-	    fi
-	fi
-
-	have_pthread_rwlock_init=no
-	AC_CHECK_FUNC(pthread_rwlock_init, [have_pthread_rwlock_init=yes])
-	if test $have_pthread_rwlock_init = yes; then
-
-	    ethr_have_pthread_rwlockattr_setkind_np=no
-	    AC_CHECK_FUNC(pthread_rwlockattr_setkind_np,
-			  [ethr_have_pthread_rwlockattr_setkind_np=yes])
-
-	    if test $ethr_have_pthread_rwlockattr_setkind_np = yes; then
-		AC_DEFINE(ETHR_HAVE_PTHREAD_RWLOCKATTR_SETKIND_NP, 1, \
-[Define if you have the pthread_rwlockattr_setkind_np() function.])
-
-		AC_MSG_CHECKING([for PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP])
-		ethr_pthread_rwlock_writer_nonrecursive_initializer_np=no
-		AC_TRY_LINK([
-				#if defined(ETHR_NEED_NPTL_PTHREAD_H)
-				#include <nptl/pthread.h>
-				#elif defined(ETHR_HAVE_MIT_PTHREAD_H)
-				#include <pthread/mit/pthread.h>
-				#elif defined(ETHR_HAVE_PTHREAD_H)
-				#include <pthread.h>
-				#endif
-			    ],
-			    [
-				pthread_rwlockattr_t *attr;
-				return pthread_rwlockattr_setkind_np(attr,
-				    PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP);
-			    ],
-			    [ethr_pthread_rwlock_writer_nonrecursive_initializer_np=yes])
-		AC_MSG_RESULT([$ethr_pthread_rwlock_writer_nonrecursive_initializer_np])
-		if test $ethr_pthread_rwlock_writer_nonrecursive_initializer_np = yes; then
-		    AC_DEFINE(ETHR_HAVE_PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP, 1, \
-[Define if you have the PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP rwlock attribute.])
-		fi
-	    fi
-	fi
-
-	if test "$force_pthread_rwlocks" = "yes"; then
-
-	    AC_DEFINE(ETHR_FORCE_PTHREAD_RWLOCK, 1, \
-[Define if you want to force usage of pthread rwlocks])
-
-	    if test $have_pthread_rwlock_init = yes; then
-		AC_MSG_WARN([Forced usage of pthread rwlocks. Note that this implementation may suffer from starvation issues.])
-	    else
-		AC_MSG_ERROR([User forced usage of pthread rwlock, but no such implementation was found])
-	    fi
-	fi
-
-	AC_CHECK_FUNC(pthread_attr_setguardsize, \
-			AC_DEFINE(ETHR_HAVE_PTHREAD_ATTR_SETGUARDSIZE, 1, \
-[Define if you have the pthread_attr_setguardsize function.]))
-
-	linux_futex=no
-	AC_MSG_CHECKING([for Linux futexes])
-	AC_TRY_LINK([
-			#include <sys/syscall.h>
-			#include <unistd.h>
-			#include <linux/futex.h>
-			#include <sys/time.h>
-		    ],
-		    [
-			int i = 1;
-			syscall(__NR_futex, (void *) &i, FUTEX_WAKE, 1,
-				(void*)0,(void*)0, 0);
-			syscall(__NR_futex, (void *) &i, FUTEX_WAIT, 0,
-				(void*)0,(void*)0, 0);
-			return 0;
-		    ],
-		    linux_futex=yes)
-	AC_MSG_RESULT([$linux_futex])
-	test $linux_futex = yes && AC_DEFINE(ETHR_HAVE_LINUX_FUTEX, 1, [Define if you have a linux futex implementation.])
-
-	fi
-
-	AC_CHECK_SIZEOF(int)
-	AC_CHECK_SIZEOF(long)
-	AC_CHECK_SIZEOF(long long)
-	AC_CHECK_SIZEOF(__int128_t)
-
-	if test "$ac_cv_sizeof_int" = "4"; then
-	    int32="int"
-	elif test "$ac_cv_sizeof_long" = "4"; then
-	    int32="long"
-	elif test "$ac_cv_sizeof_long_long" = "4"; then
-	    int32="long long"
-	else
-	    AC_MSG_ERROR([No 32-bit type found])
-	fi
-
-	if test "$ac_cv_sizeof_int" = "8"; then
-	    int64="int"
-	elif test "$ac_cv_sizeof_long" = "8"; then
-	    int64="long"
-	elif test "$ac_cv_sizeof_long_long" = "8"; then
-	    int64="long long"
-	else
-	    AC_MSG_ERROR([No 64-bit type found])
-	fi
-
-	int128=no
-	if test "$ac_cv_sizeof___int128_t" = "16"; then
-	    int128="__int128_t"
-	fi
-
-	if test "X$disable_native_ethr_impls" = "Xyes"; then
-	    ethr_have_native_atomics=no
-	else
-	    ETHR_CHK_SYNC_OP([__sync_val_compare_and_swap], [3], [32], [$int32], AC_DEFINE(ETHR_HAVE___SYNC_VAL_COMPARE_AND_SWAP32, 1, [Define if you have __sync_val_compare_and_swap() for 32-bit integers]))
-	    test "$have_sync_op" = "yes" && ethr_have_native_atomics=yes
-	    ETHR_CHK_SYNC_OP([__sync_add_and_fetch], [2], [32], [$int32], AC_DEFINE(ETHR_HAVE___SYNC_ADD_AND_FETCH32, 1, [Define if you have __sync_add_and_fetch() for 32-bit integers]))
-	    ETHR_CHK_SYNC_OP([__sync_fetch_and_and], [2], [32], [$int32], AC_DEFINE(ETHR_HAVE___SYNC_FETCH_AND_AND32, 1, [Define if you have __sync_fetch_and_and() for 32-bit integers]))
-	    ETHR_CHK_SYNC_OP([__sync_fetch_and_or], [2], [32], [$int32], AC_DEFINE(ETHR_HAVE___SYNC_FETCH_AND_OR32, 1, [Define if you have __sync_fetch_and_or() for 32-bit integers]))
-
-	    ETHR_CHK_SYNC_OP([__sync_val_compare_and_swap], [3], [64], [$int64], AC_DEFINE(ETHR_HAVE___SYNC_VAL_COMPARE_AND_SWAP64, 1, [Define if you have __sync_val_compare_and_swap() for 64-bit integers]))
-	    test "$have_sync_op" = "yes" && ethr_have_native_atomics=yes
-	    ETHR_CHK_SYNC_OP([__sync_add_and_fetch], [2], [64], [$int64], AC_DEFINE(ETHR_HAVE___SYNC_ADD_AND_FETCH64, 1, [Define if you have __sync_add_and_fetch() for 64-bit integers]))
-	    ETHR_CHK_SYNC_OP([__sync_fetch_and_and], [2], [64], [$int64], AC_DEFINE(ETHR_HAVE___SYNC_FETCH_AND_AND64, 1, [Define if you have __sync_fetch_and_and() for 64-bit integers]))
-	    ETHR_CHK_SYNC_OP([__sync_fetch_and_or], [2], [64], [$int64], AC_DEFINE(ETHR_HAVE___SYNC_FETCH_AND_OR64, 1, [Define if you have __sync_fetch_and_or() for 64-bit integers]))
-
-	    if test $int128 != no; then
-	        ETHR_CHK_SYNC_OP([__sync_val_compare_and_swap], [3], [128], [$int128], AC_DEFINE(ETHR_HAVE___SYNC_VAL_COMPARE_AND_SWAP128, 1, [Define if you have __sync_val_compare_and_swap() for 128-bit integers]))
-	    fi
-
-	    AC_MSG_CHECKING([for a usable libatomic_ops implementation])
-	    case "x$with_libatomic_ops" in
-	        xno | xyes | x)
-	    	    libatomic_ops_include=
-	    	    ;;
-	        *)
-	    	    if test -d "${with_libatomic_ops}/include"; then
-	    	        libatomic_ops_include="-I$with_libatomic_ops/include"
-	    	        CPPFLAGS="$CPPFLAGS $libatomic_ops_include"
-	    	    else
-	    	        AC_MSG_ERROR([libatomic_ops include directory $with_libatomic_ops/include not found])
-	    	    fi;;
-	    esac
-	    ethr_have_libatomic_ops=no
-	    AC_TRY_LINK([#include "atomic_ops.h"],
-	    	        [
-	    	    	    volatile AO_t x;
-	    	    	    AO_t y;
-	    	    	    int z;
-
-	    	    	    AO_nop_full();
-#if defined(AO_HAVE_store)
-	    	    	    AO_store(&x, (AO_t) 0);
-#elif defined(AO_HAVE_store_release)
-	    	    	    AO_store_release(&x, (AO_t) 0);
-#else
-#error No store
-#endif
-#if defined(AO_HAVE_load)
-	    	    	    z = AO_load(&x);
-#elif defined(AO_HAVE_load_acquire)
-	    	    	    z = AO_load_acquire(&x);
-#else
-#error No load
-#endif
-#if defined(AO_HAVE_compare_and_swap_full)
-	    	    	    z = AO_compare_and_swap_full(&x, (AO_t) 0, (AO_t) 1);
-#elif defined(AO_HAVE_compare_and_swap_release)
-	    	    	    z = AO_compare_and_swap_release(&x, (AO_t) 0, (AO_t) 1);
-#elif defined(AO_HAVE_compare_and_swap_acquire)
-	    	    	    z = AO_compare_and_swap_acquire(&x, (AO_t) 0, (AO_t) 1);
-#elif defined(AO_HAVE_compare_and_swap)
-	    	    	    z = AO_compare_and_swap(&x, (AO_t) 0, (AO_t) 1);
-#else
-#error No compare_and_swap
-#endif
-	    	        ],
-	    	        [ethr_have_native_atomics=yes
-	    	         ethr_have_libatomic_ops=yes])
-	    AC_MSG_RESULT([$ethr_have_libatomic_ops])
-	    if test $ethr_have_libatomic_ops = yes; then
-	        AC_CHECK_SIZEOF(AO_t, ,
-	    	    	        [
-	    	    	    	    #include <stdio.h>
-	    	    	    	    #include "atomic_ops.h"
-	    	    	        ])
-	        AC_DEFINE_UNQUOTED(ETHR_SIZEOF_AO_T, $ac_cv_sizeof_AO_t, [Define to the size of AO_t if libatomic_ops is used])
-
-	        AC_DEFINE(ETHR_HAVE_LIBATOMIC_OPS, 1, [Define if you have libatomic_ops atomic operations])
-	        if test "x$with_libatomic_ops" != "xno" && test "x$with_libatomic_ops" != "x"; then
-	    	    AC_DEFINE(ETHR_PREFER_LIBATOMIC_OPS_NATIVE_IMPLS, 1, [Define if you prefer libatomic_ops native ethread implementations])
-	        fi
-	        ETHR_DEFS="$ETHR_DEFS $libatomic_ops_include"
-	    elif test "x$with_libatomic_ops" != "xno" && test "x$with_libatomic_ops" != "x"; then
-	        AC_MSG_ERROR([No usable libatomic_ops implementation found])
-	    fi
-
-	    case "$host_cpu" in
-	      sparc | sun4u | sparc64 | sun4v)
-	    	    case "$with_sparc_memory_order" in
-	    	        "TSO")
-	    	    	    AC_DEFINE(ETHR_SPARC_TSO, 1, [Define if only run in Sparc TSO mode]);;
-	    	        "PSO")
-	    	    	    AC_DEFINE(ETHR_SPARC_PSO, 1, [Define if only run in Sparc PSO, or TSO mode]);;
-	    	        "RMO"|"")
-	    	    	    AC_DEFINE(ETHR_SPARC_RMO, 1, [Define if run in Sparc RMO, PSO, or TSO mode]);;
-	    	        *)
-	    	    	    AC_MSG_ERROR([Unsupported Sparc memory order: $with_sparc_memory_order]);;
-	    	    esac
-	    	    ethr_have_native_atomics=yes;; 
-	      i86pc | i*86 | x86_64 | amd64)
-	    	    if test "$enable_x86_out_of_order" = "yes"; then
-	    	    	    AC_DEFINE(ETHR_X86_OUT_OF_ORDER, 1, [Define if x86/x86_64 out of order instructions should be synchronized])
-	    	    fi
-	    	    ethr_have_native_atomics=yes;;
-	      macppc | ppc | powerpc | "Power Macintosh")
-	    	    ethr_have_native_atomics=yes;;
-	      tile)
-	    	    ethr_have_native_atomics=yes;;
-	      *)
-	    	    ;;
-	    esac
-
-	fi
-
-	test ethr_have_native_atomics = "yes" && ethr_have_native_spinlock=yes
-
-	dnl Restore LIBS
-	LIBS=$saved_libs
-	dnl restore CPPFLAGS
-	CPPFLAGS=$saved_cppflags
-
-	;;
-    *)
-	;;
-esac
-
-AC_MSG_CHECKING([whether default stack size should be modified])
-if test "x$ethr_modified_default_stack_size" != "x"; then
-	AC_DEFINE_UNQUOTED(ETHR_MODIFIED_DEFAULT_STACK_SIZE, $ethr_modified_default_stack_size, [Define if you want to modify the default stack size])
-	AC_MSG_RESULT([yes; to $ethr_modified_default_stack_size kilo words])
-else
-	AC_MSG_RESULT([no])
-fi
-
-if test "x$ETHR_THR_LIB_BASE" != "x"; then
-	ETHR_DEFS="-DUSE_THREADS $ETHR_DEFS"
-	ETHR_LIBS="-l$ethr_lib_name -lerts_internal_r $ETHR_X_LIBS"
-	ETHR_LIB_NAME=$ethr_lib_name
-fi
-
-AC_CHECK_SIZEOF(void *)
-AC_DEFINE_UNQUOTED(ETHR_SIZEOF_PTR, $ac_cv_sizeof_void_p, [Define to the size of pointers])
-
-AC_CHECK_SIZEOF(int)
-AC_DEFINE_UNQUOTED(ETHR_SIZEOF_INT, $ac_cv_sizeof_int, [Define to the size of int])
-AC_CHECK_SIZEOF(long)
-AC_DEFINE_UNQUOTED(ETHR_SIZEOF_LONG, $ac_cv_sizeof_long, [Define to the size of long])
-AC_CHECK_SIZEOF(long long)
-AC_DEFINE_UNQUOTED(ETHR_SIZEOF_LONG_LONG, $ac_cv_sizeof_long_long, [Define to the size of long long])
-AC_CHECK_SIZEOF(__int64)
-AC_DEFINE_UNQUOTED(ETHR_SIZEOF___INT64, $ac_cv_sizeof___int64, [Define to the size of __int64])
-AC_CHECK_SIZEOF(__int128_t)
-AC_DEFINE_UNQUOTED(ETHR_SIZEOF___INT128_T, $ac_cv_sizeof___int128_t, [Define to the size of __int128_t])
-
-
-case X$erl_xcomp_bigendian in
-    X) ;;
-    Xyes|Xno) ac_cv_c_bigendian=$erl_xcomp_bigendian;;
-    *) AC_MSG_ERROR([Bad erl_xcomp_bigendian value: $erl_xcomp_bigendian]);;
-esac
-
-AC_C_BIGENDIAN
-
-if test "$ac_cv_c_bigendian" = "yes"; then
-    AC_DEFINE(ETHR_BIGENDIAN, 1, [Define if bigendian])
-fi
-
-case X$erl_xcomp_double_middle_endian in
-    X) ;;
-    Xyes|Xno|Xunknown) ac_cv_c_double_middle_endian=$erl_xcomp_double_middle_endian;;
-    *) AC_MSG_ERROR([Bad erl_xcomp_double_middle_endian value: $erl_xcomp_double_middle_endian]);;
-esac
-
-AC_C_DOUBLE_MIDDLE_ENDIAN
-
-ETHR_X86_SSE2_ASM=no
-case "$GCC-$ac_cv_sizeof_void_p-$host_cpu" in
-  yes-4-i86pc | yes-4-i*86 | yes-4-x86_64 | yes-4-amd64)
-    AC_MSG_CHECKING([for gcc sse2 asm support])
-    save_CFLAGS="$CFLAGS"
-    CFLAGS="$CFLAGS -msse2"
-    gcc_sse2_asm=no
-    AC_TRY_COMPILE([],
-	[
-		long long x, *y;
-		__asm__ __volatile__("movq %1, %0\n\t" : "=x"(x) : "m"(*y) : "memory");
-	],
-	[gcc_sse2_asm=yes])
-    CFLAGS="$save_CFLAGS"
-    AC_MSG_RESULT([$gcc_sse2_asm])
-    if test "$gcc_sse2_asm" = "yes"; then
-      AC_DEFINE(ETHR_GCC_HAVE_SSE2_ASM_SUPPORT, 1, [Define if you use a gcc that supports -msse2 and understand sse2 specific asm statements])
-      ETHR_X86_SSE2_ASM=yes
-    fi
-    ;;
-  *)
-    ;;
-esac
-
-case "$GCC-$host_cpu" in
-  yes-i86pc | yes-i*86 | yes-x86_64 | yes-amd64)
-    gcc_dw_cmpxchg_asm=no
-    AC_MSG_CHECKING([for gcc double word cmpxchg asm support])    
-    AC_TRY_COMPILE([],
-	[
-    char xchgd;
-    long new[2], xchg[2], *p;		  
-    __asm__ __volatile__(
-#if ETHR_SIZEOF_PTR == 4 && defined(__PIC__) && __PIC__
-	"pushl %%ebx\n\t"
-	"movl %8, %%ebx\n\t"
-#endif
-#if ETHR_SIZEOF_PTR == 4
-	"lock; cmpxchg8b %0\n\t"
-#else
-	"lock; cmpxchg16b %0\n\t"
-#endif
-	"setz %3\n\t"
-#if ETHR_SIZEOF_PTR == 4 && defined(__PIC__) && __PIC__
-	"popl %%ebx\n\t"
-#endif
-	: "=m"(*p), "=d"(xchg[1]), "=a"(xchg[0]), "=c"(xchgd)
-	: "m"(*p), "1"(xchg[1]), "2"(xchg[0]), "3"(new[1]),
-#if ETHR_SIZEOF_PTR == 4 && defined(__PIC__) && __PIC__
-	  "r"(new[0])
-#else
-	  "b"(new[0])
-#endif
-	: "cc", "memory");
-
-	],
-	[gcc_dw_cmpxchg_asm=yes])
-    if test $gcc_dw_cmpxchg_asm = no && test $ac_cv_sizeof_void_p = 4; then
-      AC_TRY_COMPILE([],
-	  [
-      char xchgd;
-      long new[2], xchg[2], *p;
-#if !defined(__PIC__) || !__PIC__
-#  error nope
-#endif
-      __asm__ __volatile__(
-    	  "pushl %%ebx\n\t"
-	  "movl (%7), %%ebx\n\t"
-	  "movl 4(%7), %%ecx\n\t"
-	  "lock; cmpxchg8b %0\n\t"
-  	  "setz %3\n\t"
-	  "popl %%ebx\n\t"
-	  : "=m"(*p), "=d"(xchg[1]), "=a"(xchg[0]), "=c"(xchgd)
-	  : "m"(*p), "1"(xchg[1]), "2"(xchg[0]), "3"(new)
-	: "cc", "memory");
-
-	],
-	[gcc_dw_cmpxchg_asm=yes])
-      if test "$gcc_dw_cmpxchg_asm" = "yes"; then
-        AC_DEFINE(ETHR_CMPXCHG8B_REGISTER_SHORTAGE, 1, [Define if you get a register shortage with cmpxchg8b and position independent code])
-      fi
-    fi
-    AC_MSG_RESULT([$gcc_dw_cmpxchg_asm])
-    if test "$gcc_dw_cmpxchg_asm" = "yes"; then
-      AC_DEFINE(ETHR_GCC_HAVE_DW_CMPXCHG_ASM_SUPPORT, 1, [Define if you use a gcc that supports the double word cmpxchg instruction])
-    fi;;
-  *)
-    ;;
-esac
-
-AC_DEFINE(ETHR_HAVE_ETHREAD_DEFINES, 1, \
-[Define if you have all ethread defines])
-
-AC_SUBST(ETHR_X_LIBS)
-AC_SUBST(ETHR_LIBS)
-AC_SUBST(ETHR_LIB_NAME)
-AC_SUBST(ETHR_DEFS)
-AC_SUBST(ETHR_THR_LIB_BASE)
-AC_SUBST(ETHR_THR_LIB_BASE_DIR)
-AC_SUBST(ETHR_X86_SSE2_ASM)
-
-])
-
-
-
-dnl ----------------------------------------------------------------------
-dnl
-dnl ERL_TIME_CORRECTION
-dnl
-dnl In the presence of a high resolution realtime timer Erlang can adapt
-dnl its view of time relative to this timer. On solaris such a timer is
-dnl available with the syscall gethrtime(). On other OS's a fallback
-dnl solution using times() is implemented. (However on e.g. FreeBSD times()
-dnl is implemented using gettimeofday so it doesn't make much sense to
-dnl use it there...) On second thought, it seems to be safer to do it the
-dnl other way around. I.e. only use times() on OS's where we know it will
-dnl work...
-dnl
-
-AC_DEFUN(ERL_TIME_CORRECTION,
-[if test x$ac_cv_func_gethrtime = x; then
-  AC_CHECK_FUNC(gethrtime)
-fi
-if test x$clock_gettime_correction = xunknown; then
-	AC_TRY_COMPILE([#include <time.h>],
-			[struct timespec ts;
-     			 long long result;
-			 clock_gettime(CLOCK_MONOTONIC,&ts);
-                         result = ((long long) ts.tv_sec) * 1000000000LL + 
-			 ((long long) ts.tv_nsec);],
-			clock_gettime_compiles=yes,
-			clock_gettime_compiles=no)
-else
-	clock_gettime_compiles=no
-fi
-			
-
-AC_CACHE_CHECK([how to correct for time adjustments], erl_cv_time_correction,
-[
-case $clock_gettime_correction in
-    yes)
-	erl_cv_time_correction=clock_gettime;;	
-    no|unknown)
-	case $ac_cv_func_gethrtime in
-  	    yes)
-    		erl_cv_time_correction=hrtime ;;
-  	    no)
-    		case $host_os in
-        	    linux*)
-			case $clock_gettime_correction in
-			    unknown)
-				if test x$clock_gettime_compiles = xyes; then
-				    if test X$cross_compiling != Xyes; then
-				    	linux_kernel_vsn_=`uname -r`
-				    	case $linux_kernel_vsn_ in
-					    [[0-1]].*|2.[[0-5]]|2.[[0-5]].*)
-					    	erl_cv_time_correction=times ;;
-					    *)
-					    	erl_cv_time_correction=clock_gettime;;
-				    	esac
-				    else
-					case X$erl_xcomp_linux_clock_gettime_correction in
-					    X)
-						erl_cv_time_correction=cross;;
-					    Xyes|Xno)
-						if test $erl_xcomp_linux_clock_gettime_correction = yes; then
-						    erl_cv_time_correction=clock_gettime
-						else
-					    	    erl_cv_time_correction=times
-						fi;;
-					    *)
-						AC_MSG_ERROR([Bad erl_xcomp_linux_clock_gettime_correction value: $erl_xcomp_linux_clock_gettime_correction]);;
-					esac
-				    fi
-				else
-				    erl_cv_time_correction=times
-				fi
-				;;
-			     *)				
-        			erl_cv_time_correction=times ;;
-			esac
-			;;
-            	    *)
-        		erl_cv_time_correction=none ;;
-    		esac
-    		;;
-	esac
-	;;
-esac
-])
-
-xrtlib=""
-case $erl_cv_time_correction in
-  times)
-    AC_DEFINE(CORRECT_USING_TIMES,[],
-	[Define if you do not have a high-res. timer & want to use times() instead])
-    ;;
-  clock_gettime|cross)
-    if test $erl_cv_time_correction = cross; then
-	erl_cv_time_correction=clock_gettime
-	AC_MSG_WARN([result clock_gettime guessed because of cross compilation])
-    fi
-    xrtlib="-lrt"
-    AC_DEFINE(GETHRTIME_WITH_CLOCK_GETTIME,[1],
-	[Define if you want to use clock_gettime to simulate gethrtime])
-    ;;
-esac
-dnl
-dnl Check if gethrvtime is working, and if to use procfs ioctl
-dnl or (yet to be written) write to the procfs ctl file.
-dnl
-
-AC_MSG_CHECKING([if gethrvtime works and how to use it])
-AC_TRY_RUN([
-/* gethrvtime procfs ioctl test */
-/* These need to be undef:ed to not break activation of
- * micro level process accounting on /proc/self 
- */
-#ifdef _LARGEFILE_SOURCE
-#  undef _LARGEFILE_SOURCE
-#endif
-#ifdef _FILE_OFFSET_BITS
-#  undef _FILE_OFFSET_BITS
-#endif
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#include <stdio.h>
-#include <sys/time.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/signal.h>
-#include <sys/fault.h>
-#include <sys/syscall.h>
-#include <sys/procfs.h>
-#include <fcntl.h>
-
-int main() {
-    long msacct = PR_MSACCT;
-    int fd;
-    long long start, stop;
-    int i;
-    pid_t pid = getpid();
-    char proc_self[30] = "/proc/";
-
-    sprintf(proc_self+strlen(proc_self), "%lu", (unsigned long) pid);
-    if ( (fd = open(proc_self, O_WRONLY)) == -1)
-	exit(1);
-    if (ioctl(fd, PIOCSET, &msacct) < 0)
-	exit(2);
-    if (close(fd) < 0)
-	exit(3);
-    start = gethrvtime();
-    for (i = 0; i < 100; i++)
-	stop = gethrvtime();
-    if (start == 0)
-	exit(4);
-    if (start == stop)
-	exit(5);
-    exit(0); return 0;
-}
-],
-erl_gethrvtime=procfs_ioctl,
-erl_gethrvtime=false,
-[
-case X$erl_xcomp_gethrvtime_procfs_ioctl in
-    X)
-	erl_gethrvtime=cross;;
-    Xyes|Xno)
-	if test $erl_xcomp_gethrvtime_procfs_ioctl = yes; then
-	    erl_gethrvtime=procfs_ioctl
-	else
-	    erl_gethrvtime=false
-	fi;;
-    *)
-	AC_MSG_ERROR([Bad erl_xcomp_gethrvtime_procfs_ioctl value: $erl_xcomp_gethrvtime_procfs_ioctl]);;
-esac
-])
-
-case $erl_gethrvtime in
-  procfs_ioctl)
-	AC_DEFINE(HAVE_GETHRVTIME_PROCFS_IOCTL,[1],
-		[define if gethrvtime() works and uses ioctl() to /proc/self])
-	AC_MSG_RESULT(uses ioctl to procfs)
-	;;
-  *)
-	if test $erl_gethrvtime = cross; then
-	    erl_gethrvtime=false
-	    AC_MSG_RESULT(cross)
-	    AC_MSG_WARN([result 'not working' guessed because of cross compilation])
-	else
-	    AC_MSG_RESULT(not working)
-	fi
-
-	dnl
-	dnl Check if clock_gettime (linux) is working
-	dnl
-
-	AC_MSG_CHECKING([if clock_gettime can be used to get process CPU time])
-	save_libs=$LIBS
-	LIBS="-lrt"
-	AC_TRY_RUN([
-	#include <stdlib.h>
-	#include <unistd.h>
-	#include <string.h>
-	#include <stdio.h>
-	#include <time.h>
-	int main() {
-	    long long start, stop;
-	    int i;
-	    struct timespec tp;
-
-	    if (clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &tp) < 0)
-	      exit(1);
-	    start = ((long long)tp.tv_sec * 1000000000LL) + (long long)tp.tv_nsec;
-	    for (i = 0; i < 100; i++)
-	      clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &tp);
-	    stop = ((long long)tp.tv_sec * 1000000000LL) + (long long)tp.tv_nsec;
-	    if (start == 0)
-	      exit(4);
-	    if (start == stop)
-	      exit(5);
-	    exit(0); return 0;
-	  }
-	],
-	erl_clock_gettime=yes,
-	erl_clock_gettime=no,
-	[
-	case X$erl_xcomp_clock_gettime_cpu_time in
-	    X) erl_clock_gettime=cross;;
-	    Xyes|Xno) erl_clock_gettime=$erl_xcomp_clock_gettime_cpu_time;;
-	    *) AC_MSG_ERROR([Bad erl_xcomp_clock_gettime_cpu_time value: $erl_xcomp_clock_gettime_cpu_time]);;
-	esac
-	])
-	LIBS=$save_libs
-	case $host_os in
-		linux*)
-			AC_MSG_RESULT([no; not stable])
-			LIBRT=$xrtlib
-			;;
-		*)
-			AC_MSG_RESULT($erl_clock_gettime)
-			case $erl_clock_gettime in
-	  			yes)
-					AC_DEFINE(HAVE_CLOCK_GETTIME,[],
-						  [define if clock_gettime() works for getting process time])
-					LIBRT=-lrt
-					;;
-	  			cross)
-					erl_clock_gettime=no
-					AC_MSG_WARN([result no guessed because of cross compilation])
-					LIBRT=$xrtlib
-					;;
-	  			*)
-					LIBRT=$xrtlib
-					;;
-			esac
-			;;
-	esac
-	AC_SUBST(LIBRT)
-	;;
-esac
-])dnl
-
-dnl ----------------------------------------------------------------------
-dnl
-dnl LM_TRY_ENABLE_CFLAG
-dnl
-dnl
-dnl Tries a CFLAG and sees if it can be enabled without compiler errors
-dnl $1: textual cflag to add
-dnl $2: variable to store the modified CFLAG in
-dnl Usage example LM_TRY_ENABLE_CFLAG([-Werror=return-type], [CFLAGS])
-dnl
-dnl
-AC_DEFUN([LM_TRY_ENABLE_CFLAG], [
-    AC_MSG_CHECKING([if we can add $1 to $2 (via CFLAGS)])
-    saved_CFLAGS=$CFLAGS;
-    CFLAGS="$1 $$2";
-    AC_TRY_COMPILE([],[return 0;],can_enable_flag=true,can_enable_flag=false)
-    CFLAGS=$saved_CFLAGS;
-    if test "X$can_enable_flag" = "Xtrue"; then
-        AC_MSG_RESULT([yes])
-        AS_VAR_SET($2, "$1 $$2")
-    else
-        AC_MSG_RESULT([no])
-    fi
-])
-
-dnl ERL_TRY_LINK_JAVA(CLASSES, FUNCTION-BODY
-dnl                   [ACTION_IF_FOUND [, ACTION-IF-NOT-FOUND]])
-dnl Freely inspired by AC_TRY_LINK. (Maybe better to create a 
-dnl AC_LANG_JAVA instead...)
-AC_DEFUN(ERL_TRY_LINK_JAVA,
-[java_link='$JAVAC conftest.java 1>&AC_FD_CC'
-changequote(, )dnl
-cat > conftest.java <<EOF
-$1
-class conftest { public static void main(String[] args) {
-   $2
-   ; return; }}
-EOF
-changequote([, ])dnl
-if AC_TRY_EVAL(java_link) && test -s conftest.class; then
-   ifelse([$3], , :, [rm -rf conftest*
-   $3])
-else
-   echo "configure: failed program was:" 1>&AC_FD_CC
-   cat conftest.java 1>&AC_FD_CC
-   echo "configure: PATH was $PATH" 1>&AC_FD_CC
-ifelse([$4], , , [  rm -rf conftest*
-  $4
-])dnl
-fi
-rm -f conftest*])
-#define UNSAFE_MASK  0xc0000000 /* Mask for bits that must be constant */
-
-