$OpenBSD: patch-gcc_config_rs6000_sysv4_h,v 1.1 2012/04/23 14:12:19 pascal Exp $
--- gcc/config/rs6000/sysv4.h.orig	Thu Apr 12 14:35:44 2012
+++ gcc/config/rs6000/sysv4.h	Thu Apr 12 14:36:06 2012
@@ -989,7 +989,7 @@ ncrtn.o%s"
 #endif
 
 #ifndef CPP_OS_OPENBSD_SPEC
-#define CPP_OS_OPENBSD_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_POSIX_THREADS}"
+#define CPP_OS_OPENBSD_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
 #endif
 
 /* WindISS support.  */
