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Update to latest Autoconf CVS for AC_GNU_SOURCE

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(renamed from AC__GNU_SOURCE).
This commit is contained in:
Paul Eggert 2002-06-11 06:06:32 +00:00
parent f4468d980d
commit 6756cc9358
1 changed files with 10 additions and 23 deletions
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33
m4/gnu-source.m4
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@ -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])
])