gcc/config/extensions.m4
Ralf Wildenhues 1b3b24c2a6 extensions.m4 (AC_USE_SYSTEM_EXTENSIONS): Do not expand for Autoconf 2.62 or newer.
config/
	* extensions.m4 (AC_USE_SYSTEM_EXTENSIONS): Do not expand
	for Autoconf 2.62 or newer.
	* tls.m4 (GCC_CHECK_TLS): Fix m4 quotation.
	* no-executables.m4 (_AC_COMPILER_EXEEXT): Fix m4 quotation.
	* override.m4 (m4_copy_force, m4_rename_force): Provide
	macros if not defined.
	(AC_PREREQ): Use m4_copy_force.

boehm-gc/
	* configure.ac (_AC_ARG_VAR_PRECIOUS): Use m4_rename_force.

libada/
	* configure.ac (_AC_ARG_VAR_PRECIOUS): Use m4_rename_force.

libffi/
	* configure.ac (_AC_ARG_VAR_PRECIOUS): Use m4_rename_force.

libgfortran/
	* configure.ac (_AC_ARG_VAR_PRECIOUS): Use m4_rename_force.

libgomp/
	* configure.ac (_AC_ARG_VAR_PRECIOUS): Use m4_rename_force.

libjava/
	* configure.ac (_AC_ARG_VAR_PRECIOUS): Use m4_rename_force.

libmudflap/
	* configure.ac (_AC_ARG_VAR_PRECIOUS): Use m4_rename_force.

libobjc/
	* configure.ac (_AC_ARG_VAR_PRECIOUS): Use m4_rename_force.

libssp/
	* configure.ac (_AC_ARG_VAR_PRECIOUS): Use m4_rename_force.

zlib/
	* configure.ac (_AC_ARG_VAR_PRECIOUS): Use m4_rename_force.

libstdc++-v3/
	* acinclude.m4 (GLIBCXX_CONFIGURE): Use m4_rename_force.

From-SVN: r150269
2009-07-30 19:41:13 +00:00

80 lines
2.7 KiB
Plaintext

# serial 6 -*- Autoconf -*-
# Enable extensions on systems that normally disable them.
# Copyright (C) 2003, 2006, 2007, 2009 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 definition of AC_USE_SYSTEM_EXTENSIONS is stolen from CVS
# Autoconf. Perhaps we can remove this once we can assume Autoconf
# 2.62 or later everywhere, but since CVS Autoconf mutates rapidly
# enough in this area it's likely we'll need to redefine
# AC_USE_SYSTEM_EXTENSIONS for quite some time.
m4_version_prereq([2.62],, [
# AC_USE_SYSTEM_EXTENSIONS
# ------------------------
# Enable extensions on systems that normally disable them,
# typically due to standards-conformance issues.
# Remember that #undef in AH_VERBATIM gets replaced with #define by
# AC_DEFINE. The goal here is to define all known feature-enabling
# macros, then, if reports of conflicts are made, disable macros that
# cause problems on some platforms (such as __EXTENSIONS__).
AC_DEFUN([AC_USE_SYSTEM_EXTENSIONS],
[AC_BEFORE([$0], [AC_COMPILE_IFELSE])dnl
AC_BEFORE([$0], [AC_RUN_IFELSE])dnl
AC_CHECK_HEADER([minix/config.h], [MINIX=yes], [MINIX=])
if test "$MINIX" = yes; then
AC_DEFINE([_POSIX_SOURCE], [1],
[Define to 1 if you need to in order for `stat' and other
things to work.])
AC_DEFINE([_POSIX_1_SOURCE], [2],
[Define to 2 if the system does not provide POSIX.1 features
except with this defined.])
AC_DEFINE([_MINIX], [1],
[Define to 1 if on MINIX.])
fi
AH_VERBATIM([__EXTENSIONS__],
[/* Enable extensions on AIX 3, Interix. */
#ifndef _ALL_SOURCE
# undef _ALL_SOURCE
#endif
/* Enable GNU extensions on systems that have them. */
#ifndef _GNU_SOURCE
# undef _GNU_SOURCE
#endif
/* Enable threading extensions on Solaris. */
#ifndef _POSIX_PTHREAD_SEMANTICS
# undef _POSIX_PTHREAD_SEMANTICS
#endif
/* Enable extensions on HP NonStop. */
#ifndef _TANDEM_SOURCE
# undef _TANDEM_SOURCE
#endif
/* Enable general extensions on Solaris. */
#ifndef __EXTENSIONS__
# undef __EXTENSIONS__
#endif
])
AC_CACHE_CHECK([whether it is safe to define __EXTENSIONS__],
[ac_cv_safe_to_define___extensions__],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([
# define __EXTENSIONS__ 1
AC_INCLUDES_DEFAULT])],
[ac_cv_safe_to_define___extensions__=yes],
[ac_cv_safe_to_define___extensions__=no])])
test $ac_cv_safe_to_define___extensions__ = yes &&
AC_DEFINE([__EXTENSIONS__])
AC_DEFINE([_ALL_SOURCE])
AC_DEFINE([_GNU_SOURCE])
AC_DEFINE([_POSIX_PTHREAD_SEMANTICS])
AC_DEFINE([_TANDEM_SOURCE])
])# AC_USE_SYSTEM_EXTENSIONS
])