$OpenBSD: patch-lib_Support_Unix_Signals_inc,v 1.2 2016/05/14 20:36:36 ajacoutot Exp $
--- lib/Support/Unix/Signals.inc.orig	Tue Dec  1 01:12:59 2015
+++ lib/Support/Unix/Signals.inc	Fri Mar 25 22:06:21 2016
@@ -24,7 +24,7 @@
 #include "llvm/Support/raw_ostream.h"
 #include <algorithm>
 #include <string>
-#if HAVE_EXECINFO_H
+#if defined(HAVE_BACKTRACE) && defined(ENABLE_BACKTRACES)
 # include <execinfo.h>         // For backtrace().
 #endif
 #if HAVE_SIGNAL_H
