$OpenBSD: patch-configure_ac,v 1.2 2015/12/15 15:32:04 robert Exp $
--- configure.ac.orig	Sun Dec 13 18:11:34 2015
+++ configure.ac	Sun Dec 13 18:11:51 2015
@@ -177,7 +177,6 @@ case "$host" in
 		AC_DEFINE(PTHREAD_POINTER_ID)
 		libdl=
 		libgc_threads=pthreads
-		with_sigaltstack=no
 		use_sigposix=yes
 		;;
 	*-*-linux-android*)
