X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fextensions.m4;h=99fba9f63bc63c1a2747964fcc4fa51649edf6c2;hb=f4afe5cea2bcafa496240334283ac7e280b20a0a;hp=b7ee9ef13084e5b6700d065f8c47f30a9aeceddf;hpb=83514f1de3c7dc1af07f1d757cd8b7fe7bc837e9;p=gnulib.git

diff --git a/m4/extensions.m4 b/m4/extensions.m4
index b7ee9ef13..99fba9f63 100644
--- a/m4/extensions.m4
+++ b/m4/extensions.m4
@@ -1,4 +1,4 @@
-# serial 7  -*- Autoconf -*-
+# serial 8  -*- Autoconf -*-
 # Enable extensions on systems that normally disable them.
 
 # Copyright (C) 2003, 2006-2009 Free Software Foundation, Inc.
@@ -20,7 +20,7 @@
 # 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_DEFUN_ONCE([AC_USE_SYSTEM_EXTENSIONS],
 [AC_BEFORE([$0], [AC_COMPILE_IFELSE])dnl
 AC_BEFORE([$0], [AC_RUN_IFELSE])dnl
 
@@ -74,8 +74,8 @@ AC_BEFORE([$0], [AC_RUN_IFELSE])dnl
     [ac_cv_safe_to_define___extensions__],
     [AC_COMPILE_IFELSE(
        [AC_LANG_PROGRAM([[
-#	  define __EXTENSIONS__ 1
-	  ]AC_INCLUDES_DEFAULT])],
+#         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 &&
@@ -90,7 +90,7 @@ AC_BEFORE([$0], [AC_RUN_IFELSE])dnl
 # ------------------------
 # Enable extensions on systems that normally disable them,
 # typically due to standards-conformance issues.
-AC_DEFUN([gl_USE_SYSTEM_EXTENSIONS],
+AC_DEFUN_ONCE([gl_USE_SYSTEM_EXTENSIONS],
 [
   dnl Require this macro before AC_USE_SYSTEM_EXTENSIONS.
   dnl gnulib does not need it. But if it gets required by third-party macros