diff options
Diffstat (limited to 'm4/gnu-source.m4')
| -rw-r--r-- | m4/gnu-source.m4 | 33 |
1 files changed, 10 insertions, 23 deletions
diff --git a/m4/gnu-source.m4 b/m4/gnu-source.m4 index d2f490b0d..edecf5ddb 100644 --- a/m4/gnu-source.m4 +++ b/m4/gnu-source.m4 @@ -1,25 +1,12 @@ -#serial 3 -# Make sure _GNU_SOURCE is defined where necessary: as early as possible -# for configure-time tests, as well as for every source file that includes -# config.h. - -# From Jim Meyering. - -AC_DEFUN([AC__GNU_SOURCE], -[ - # Make sure that _GNU_SOURCE is defined for all subsequent - # configure-time compile tests. - # This definition must be emitted (into confdefs.h) before any - # test that involves compilation. - cat >>confdefs.h <<\EOF +# AC_GNU_SOURCE +# -------------- +AC_DEFUN([AC_GNU_SOURCE], +[AH_VERBATIM([_GNU_SOURCE], +[/* Enable GNU extensions on systems that have them. */ #ifndef _GNU_SOURCE -# define _GNU_SOURCE -#endif -EOF - - # Emit this code into config.h.in. - # The ifndef is to avoid redefinition warnings. - AH_VERBATIM([_GNU_SOURCE], [#ifndef _GNU_SOURCE -# define _GNU_SOURCE -#endif]) +# undef _GNU_SOURCE +#endif])dnl +AC_BEFORE([$0], [AC_COMPILE_IFELSE])dnl +AC_BEFORE([$0], [AC_RUN_IFELSE])dnl +AC_DEFINE([_GNU_SOURCE]) ]) |