$OpenBSD: patch-libavutil_ppc_cpu_c,v 1.2 2011/04/12 22:59:07 sthen Exp $
--- libavutil/ppc/cpu.c.orig	Mon Mar 28 19:23:17 2011
+++ libavutil/ppc/cpu.c	Sat Apr  2 01:04:37 2011
@@ -20,6 +20,7 @@
 #undef _POSIX_C_SOURCE
 #include <sys/sysctl.h>
 #elif defined(__OpenBSD__)
+#undef _POSIX_C_SOURCE
 #include <sys/param.h>
 #include <sys/sysctl.h>
 #include <machine/cpu.h>
