Commit e70d209b authored by Paul Eggert's avatar Paul Eggert

* m4/extensions.m4 (gl_USE_SYSTEM_EXTENSIONS): Undo previous

change, since Autoconf's version may no longer be appropriate now
that we are using CVS Autoconf's version.  Add support for Tandem.

2006-10-11  Paul Eggert  <eggert@cs.ucla.edu>
parent cfc2c6ca
2006-10-11 Paul Eggert <eggert@cs.ucla.edu>
* m4/extensions.m4 (gl_USE_SYSTEM_EXTENSIONS): Undo previous
change, since Autoconf's version may no longer be appropriate now
that we are using CVS Autoconf's version. Add support for Tandem.
2006-10-11 Paul Eggert <eggert@cs.ucla.edu>
Bruno Haible <bruno@clisp.org>
......
# serial 2 -*- Autoconf -*-
# serial 3 -*- Autoconf -*-
# Enable extensions on systems that normally disable them.
# Copyright (C) 2003, 2006 Free Software Foundation, Inc.
......@@ -6,41 +6,48 @@
# 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.
# The main body of this macro is stolen from CVS Autoconf. Perhaps we
# can replace it with AC_USE_SYSTEM_EXTENSIONS once we can assume
# Autoconf 2.61 or later everywhere, but since CVS Autoconf mutates
# rapidly enough in this area it's likely that we'll need
# gl_USE_SYSTEM_EXTENSIONS for quite some time.
# _gl_TANDEM_SOURCE
# gl_USE_SYSTEM_EXTENSIONS
# ------------------------
# Enable extensions on systems that normally disable them,
# typically due to standards-conformance issues.
m4_ifdef([AC_USE_SYSTEM_EXTENSIONS],
[AC_DEFUN([gl_USE_SYSTEM_EXTENSIONS],
[AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])])],
[AC_DEFUN([gl_USE_SYSTEM_EXTENSIONS], [
AC_BEFORE([$0], [AC_COMPILE_IFELSE])
AC_BEFORE([$0], [AC_RUN_IFELSE])
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])
AC_REQUIRE([AC_GNU_SOURCE])
AC_REQUIRE([AC_AIX])
AC_REQUIRE([AC_MINIX])
AH_VERBATIM([__EXTENSIONS__],
AH_VERBATIM([__EXTENSIONS__],
[/* Enable extensions on Solaris. */
#ifndef __EXTENSIONS__
# undef __EXTENSIONS__
#endif
#ifndef _POSIX_PTHREAD_SEMANTICS
# undef _POSIX_PTHREAD_SEMANTICS
#endif
#ifndef _TANDEM_SOURCE
# undef _TANDEM_SOURCE
#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])
])])
AC_CACHE_CHECK([whether it is safe to define __EXTENSIONS__],
[gl_cv_safe_to_define___extensions__],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([
# define __EXTENSIONS__ 1
AC_INCLUDES_DEFAULT])],
[gl_cv_safe_to_define___extensions__=yes],
[gl_cv_safe_to_define___extensions__=no])])
test $gl_cv_safe_to_define___extensions__ = yes &&
AC_DEFINE([__EXTENSIONS__])
AC_DEFINE([_POSIX_PTHREAD_SEMANTICS])
AC_DEFINE([_TANDEM_SOURCE])
])
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