(gl_USE_SYSTEM_EXTENSIONS): Fix typo: s/ifndef/ifdef/.

diff --git a/m4/extensions.m4 b/m4/extensions.m4
index 6f34a8d35c04f921214bbefe62da6993dc875fd0..e9b6b54dd4e67d93a4b201d0c13536c18384459a 100644 (file)
--- a/m4/extensions.m4
+++ b/m4/extensions.m4
@@ -1,6 +1,6 @@
 # Enable extensions on systems that normally disable them.
 
-# Copyright (C) 2003 Free Software Foundation, Inc.
+# Copyright (C) 2003, 2005 Free Software Foundation, Inc.
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.
@@ -19,7 +19,7 @@ AC_DEFUN([gl_USE_SYSTEM_EXTENSIONS], [
 
   AH_VERBATIM([__EXTENSIONS__],
 [/* Enable extensions on Solaris.  */
-#ifndef __EXTENSIONS__
+#ifdef __EXTENSIONS__
 # undef __EXTENSIONS__
 #endif])
   AC_DEFINE([__EXTENSIONS__])