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

[pspp] / m4 / extensions.m4

diff --git a/m4/extensions.m4 b/m4/extensions.m4
index 7faaa833bd22f83be1d364372a86a49cb18e8d75..e9b6b54dd4e67d93a4b201d0c13536c18384459a 100644 (file)
--- a/m4/extensions.m4
+++ b/m4/extensions.m4
@@ -1,15 +1,26 @@
+# Enable extensions on systems that normally disable them.
+
+# 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.
+
 # gl_USE_SYSTEM_EXTENSIONS
 # ------------------------
 # Enable extensions on systems that normally disable them,
 # typically due to standards-conformance issues.
 AC_DEFUN([gl_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__
+#ifdef __EXTENSIONS__
 # undef __EXTENSIONS__
 #endif])
-  AC_BEFORE([$0], [AC_COMPILE_IFELSE])dnl
-  AC_BEFORE([$0], [AC_RUN_IFELSE])dnl
   AC_DEFINE([__EXTENSIONS__])
 ])