--- ./scheduler/auth.c.orig	2009-07-01 10:07:46.000000000 +0200
+++ ./scheduler/auth.c	2009-07-01 10:07:58.000000000 +0200
@@ -54,6 +54,8 @@
  * Include necessary headers...
  */
 
+#define _GNU_SOURCE
+
 #include "cupsd.h"
 #include <grp.h>
 #ifdef HAVE_SHADOW_H