$OpenBSD: patch-configure_ac,v 1.1 2014/12/29 10:49:12 robert Exp $
--- configure.ac.orig	Sun Dec 28 16:23:34 2014
+++ configure.ac	Sun Dec 28 16:23:45 2014
@@ -188,9 +188,7 @@ case "$host" in
 		need_link_unlink=yes
 		AC_DEFINE(PTHREAD_POINTER_ID)
 		libdl=
-		libgc_default=boehm
 		libgc_threads=pthreads
-		with_sigaltstack=no
 		use_sigposix=yes
 		;;
 	*-*-linux-android*)
