$OpenBSD: patch-gcc_config_openbsd-libpthread_h,v 1.2 2010/04/29 16:45:53 jsg Exp $
--- gcc/config/openbsd-libpthread.h.orig	Thu Sep 17 21:56:56 2009
+++ gcc/config/openbsd-libpthread.h	Wed Apr 28 23:09:26 2010
@@ -1,3 +1,26 @@
+/* LIB_SPEC appropriate for OpenBSD.  Include -lpthread if -pthread is
+   specified on the command line. */
+/*   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU CC.
+
+GNU CC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU CC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU CC; see the file COPYING.  If not, write to
+the Free Software Foundation, 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#define OBSD_LIB_SPEC "%{!shared:%{pthread:-lpthread} -lc}"
+
 /* LLVM LOCAL begin (ENTIRE FILE!) */
 /* LIB_SPEC appropriate for OpenBSD.  Include -lpthread if -pthread is
    specified on the command line. */