File: ac_system_extensions.m4

package info (click to toggle)
protobuf2 2.6.1-4
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, sid
  • size: 15,844 kB
  • sloc: cpp: 118,159; java: 25,207; python: 13,345; sh: 11,754; makefile: 956; xml: 246; lisp: 89; ansic: 9
file content (37 lines) | stat: -rw-r--r-- 1,105 bytes parent folder | download | duplicates (28)
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
dnl Provide AC_USE_SYSTEM_EXTENSIONS for old autoconf machines.
AC_DEFUN([ACX_USE_SYSTEM_EXTENSIONS],[
  ifdef([AC_USE_SYSTEM_EXTENSIONS],[
    AC_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
#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_DEFINE([_TANDEM_SOURCE])
  ])
])