|
815.1.1
by Monty Taylor
Add timegm which is missing on Solaris. |
1 |
# serial 5 -*- Autoconf -*- |
2 |
# Enable extensions on systems that normally disable them. |
|
3 |
||
4 |
# Copyright (C) 2003, 2006-2008 Free Software Foundation, Inc. |
|
5 |
# This file is free software; the Free Software Foundation |
|
6 |
# gives unlimited permission to copy and/or distribute it, |
|
7 |
# with or without modifications, as long as this notice is preserved. |
|
8 |
||
9 |
# This definition of AC_USE_SYSTEM_EXTENSIONS is stolen from CVS |
|
10 |
# Autoconf. Perhaps we can remove this once we can assume Autoconf |
|
11 |
# 2.62 or later everywhere, but since CVS Autoconf mutates rapidly |
|
12 |
# enough in this area it's likely we'll need to redefine |
|
13 |
# AC_USE_SYSTEM_EXTENSIONS for quite some time. |
|
14 |
||
15 |
# AC_USE_SYSTEM_EXTENSIONS |
|
16 |
# ------------------------ |
|
17 |
# Enable extensions on systems that normally disable them, |
|
18 |
# typically due to standards-conformance issues. |
|
19 |
# Remember that #undef in AH_VERBATIM gets replaced with #define by |
|
20 |
# AC_DEFINE. The goal here is to define all known feature-enabling |
|
21 |
# macros, then, if reports of conflicts are made, disable macros that |
|
22 |
# cause problems on some platforms (such as __EXTENSIONS__). |
|
23 |
AC_DEFUN([AC_USE_SYSTEM_EXTENSIONS], |
|
24 |
[AC_BEFORE([$0], [AC_COMPILE_IFELSE])dnl |
|
25 |
AC_BEFORE([$0], [AC_RUN_IFELSE])dnl |
|
26 |
||
27 |
AC_CHECK_HEADER([minix/config.h], [MINIX=yes], [MINIX=]) |
|
28 |
if test "$MINIX" = yes; then |
|
29 |
AC_DEFINE([_POSIX_SOURCE], [1], |
|
30 |
[Define to 1 if you need to in order for `stat' and other |
|
31 |
things to work.]) |
|
32 |
AC_DEFINE([_POSIX_1_SOURCE], [2], |
|
33 |
[Define to 2 if the system does not provide POSIX.1 features |
|
34 |
except with this defined.]) |
|
35 |
AC_DEFINE([_MINIX], [1], |
|
36 |
[Define to 1 if on MINIX.]) |
|
37 |
fi
|
|
38 |
||
39 |
AH_VERBATIM([__EXTENSIONS__], |
|
40 |
[/* Enable extensions on AIX 3, Interix. */ |
|
41 |
#ifndef _ALL_SOURCE |
|
42 |
# undef _ALL_SOURCE |
|
43 |
#endif |
|
44 |
/* Enable GNU extensions on systems that have them. */
|
|
45 |
#ifndef _GNU_SOURCE |
|
46 |
# undef _GNU_SOURCE |
|
47 |
#endif |
|
48 |
/* Enable threading extensions on Solaris. */
|
|
|
656.1.31
by Monty Taylor
Replaced my hacked up m4/ac_system_extensions.m4 with the one from gnulib. |
49 |
#ifndef _POSIX_PTHREAD_SEMANTICS |
|
656.1.30
by Monty Taylor
Reverted gnulib changes. |
50 |
# undef _POSIX_PTHREAD_SEMANTICS |
51 |
#endif |
|
|
815.1.1
by Monty Taylor
Add timegm which is missing on Solaris. |
52 |
/* Enable extensions on HP NonStop. */
|
|
656.1.30
by Monty Taylor
Reverted gnulib changes. |
53 |
#ifndef _TANDEM_SOURCE |
54 |
# undef _TANDEM_SOURCE |
|
|
815.1.1
by Monty Taylor
Add timegm which is missing on Solaris. |
55 |
#endif |
56 |
/* Enable general extensions on Solaris. */
|
|
57 |
#ifndef __EXTENSIONS__ |
|
58 |
# undef __EXTENSIONS__ |
|
59 |
#endif |
|
|
656.1.31
by Monty Taylor
Replaced my hacked up m4/ac_system_extensions.m4 with the one from gnulib. |
60 |
])
|
|
815.1.1
by Monty Taylor
Add timegm which is missing on Solaris. |
61 |
AC_CACHE_CHECK([whether it is safe to define __EXTENSIONS__], |
62 |
[ac_cv_safe_to_define___extensions__], |
|
63 |
[AC_COMPILE_IFELSE( |
|
64 |
[AC_LANG_PROGRAM([[ |
|
65 |
# define __EXTENSIONS__ 1 |
|
66 |
]AC_INCLUDES_DEFAULT])], |
|
67 |
[ac_cv_safe_to_define___extensions__=yes], |
|
68 |
[ac_cv_safe_to_define___extensions__=no])]) |
|
69 |
test $ac_cv_safe_to_define___extensions__ = yes && |
|
70 |
AC_DEFINE([__EXTENSIONS__]) |
|
71 |
AC_DEFINE([_ALL_SOURCE]) |
|
72 |
AC_DEFINE([_GNU_SOURCE]) |
|
73 |
AC_DEFINE([_POSIX_PTHREAD_SEMANTICS]) |
|
74 |
AC_DEFINE([_TANDEM_SOURCE]) |
|
75 |
])# AC_USE_SYSTEM_EXTENSIONS |
|
76 |
||
77 |
# gl_USE_SYSTEM_EXTENSIONS |
|
78 |
# ------------------------ |
|
79 |
# Enable extensions on systems that normally disable them, |
|
80 |
# typically due to standards-conformance issues. |
|
81 |
AC_DEFUN([gl_USE_SYSTEM_EXTENSIONS], |
|
82 |
[AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])]) |