1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
$NetBSD: patch-ac,v 1.1 2008/09/07 02:40:53 bjs Exp $
--- aclocal.m4.orig 2008-09-06 22:03:58.000000000 -0400
+++ aclocal.m4
@@ -940,3 +940,66 @@ m4_include([m4/gnupg-pth.m4])
m4_include([m4/onceonly.m4])
m4_include([m4/socklen.m4])
m4_include([m4/sys_socket_h.m4])
+
+# 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
|
