+++ /dev/null
-# serial 13 -*- Autoconf -*-
-# Enable extensions on systems that normally disable them.
-
-# Copyright (C) 2003, 2006-2016 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 git
-# Autoconf. Perhaps we can remove this once we can assume Autoconf
-# 2.70 or later everywhere, but since Autoconf mutates rapidly
-# enough in this area it's likely we'll need to redefine
-# AC_USE_SYSTEM_EXTENSIONS for quite some time.
-
-# If autoconf reports a warning
-# warning: AC_COMPILE_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS
-# or warning: AC_RUN_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS
-# the fix is
-# 1) to ensure that AC_USE_SYSTEM_EXTENSIONS is never directly invoked
-# but always AC_REQUIREd,
-# 2) to ensure that for each occurrence of
-# AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
-# or
-# AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
-# the corresponding gnulib module description has 'extensions' among
-# its dependencies. This will ensure that the gl_USE_SYSTEM_EXTENSIONS
-# invocation occurs in gl_EARLY, not in gl_INIT.
-
-# 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_ONCE([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.])
- AC_DEFINE([_NETBSD_SOURCE], [1],
- [Define to 1 to make NetBSD features available. MINIX 3 needs this.])
- fi
-
-dnl Use a different key than __EXTENSIONS__, as that name broke existing
-dnl configure.ac when using autoheader 2.62.
- AH_VERBATIM([USE_SYSTEM_EXTENSIONS],
-[/* Enable extensions on AIX 3, Interix. */
-#ifndef _ALL_SOURCE
-# undef _ALL_SOURCE
-#endif
-/* Enable general extensions on OS X. */
-#ifndef _DARWIN_C_SOURCE
-# undef _DARWIN_C_SOURCE
-#endif
-/* Enable GNU extensions on systems that have them. */
-#ifndef _GNU_SOURCE
-# undef _GNU_SOURCE
-#endif
-/* Use GNU style printf and scanf. */
-#ifndef __USE_MINGW_ANSI_STDIO
-# undef __USE_MINGW_ANSI_STDIO
-#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 X/Open extensions if necessary. HP-UX 11.11 defines
- mbstate_t only if _XOPEN_SOURCE is defined to 500, regardless of
- whether compiling with -Ae or -D_HPUX_SOURCE=1. */
-#ifndef _XOPEN_SOURCE
-# undef _XOPEN_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([_DARWIN_C_SOURCE])
- AC_DEFINE([_GNU_SOURCE])
- AC_DEFINE([__USE_MINGW_ANSI_STDIO])
- AC_DEFINE([_POSIX_PTHREAD_SEMANTICS])
- AC_DEFINE([_TANDEM_SOURCE])
- AC_CACHE_CHECK([whether _XOPEN_SOURCE should be defined],
- [ac_cv_should_define__xopen_source],
- [ac_cv_should_define__xopen_source=no
- AC_COMPILE_IFELSE(
- [AC_LANG_PROGRAM([[
- #include <wchar.h>
- mbstate_t x;]])],
- [],
- [AC_COMPILE_IFELSE(
- [AC_LANG_PROGRAM([[
- #define _XOPEN_SOURCE 500
- #include <wchar.h>
- mbstate_t x;]])],
- [ac_cv_should_define__xopen_source=yes])])])
- test $ac_cv_should_define__xopen_source = yes &&
- AC_DEFINE([_XOPEN_SOURCE], [500])
-])# AC_USE_SYSTEM_EXTENSIONS
-
-# gl_USE_SYSTEM_EXTENSIONS
-# ------------------------
-# Enable extensions on systems that normally disable them,
-# typically due to standards-conformance issues.
-AC_DEFUN_ONCE([gl_USE_SYSTEM_EXTENSIONS],
-[
- dnl Require this macro before AC_USE_SYSTEM_EXTENSIONS.
- dnl gnulib does not need it. But if it gets required by third-party macros
- dnl after AC_USE_SYSTEM_EXTENSIONS is required, autoconf 2.62..2.63 emit a
- dnl warning: "AC_COMPILE_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS".
- dnl Note: We can do this only for one of the macros AC_AIX, AC_GNU_SOURCE,
- dnl AC_MINIX. If people still use AC_AIX or AC_MINIX, they are out of luck.
- AC_REQUIRE([AC_GNU_SOURCE])
-
- AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
-])
projects / babeltrace.git / blobdiff