extensions.m4
No OneTemporary
Actions

Size

1 KB

Referenced Files

None

Subscribers

None

extensions.m4
View Options

	# Enable extensions on systems that normally disable them.

	# Copyright (C) 2003, 2006 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 file is only needed in autoconf <= 2.59. Newer versions of autoconf
	# have a macro AC_USE_SYSTEM_EXTENSIONS with identical semantics.

	# gl_USE_SYSTEM_EXTENSIONS
	# ------------------------
	# Enable extensions on systems that normally disable them,
	# typically due to standards-conformance issues.
	AC_DEFUN([gl_USE_SYSTEM_EXTENSIONS], [
	#AC_BEFORE([$0], [AC_COMPILE_IFELSE])
	#AC_BEFORE([$0], [AC_RUN_IFELSE])

	AC_REQUIRE([AC_GNU_SOURCE])
	AC_REQUIRE([AC_AIX])
	AC_REQUIRE([AC_MINIX])

	AH_VERBATIM([__EXTENSIONS__],
	[/* Enable extensions on Solaris. */
	#ifndef __EXTENSIONS__
	# undef __EXTENSIONS__
	#endif
	#ifndef _POSIX_PTHREAD_SEMANTICS
	# undef _POSIX_PTHREAD_SEMANTICS
	#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([_POSIX_PTHREAD_SEMANTICS])
	])