--- bison-2.4.2/lib/spawn.in.h.orig	2010-04-23 12:37:10.000000000 +0200
+++ bison-2.4.2/lib/spawn.in.h	2010-04-23 12:37:38.000000000 +0200
@@ -31,7 +31,7 @@
 
 /* Get definitions of 'struct sched_param' and 'sigset_t'.
    But avoid namespace pollution on glibc systems.  */
-#ifndef __GLIBC__
+#if 1
 # include <sched.h>
 # include <signal.h>
 #endif