From 3cdd7966d72a7e8b2e63938cbbb62030556b93fe Mon Sep 17 00:00:00 2001
From: Nick Mathewson <nickm@torproject.org>
Date: Mon, 18 Nov 2013 13:05:23 -0500
Subject: [PATCH] Add a _GNU_SOURCE definition to backtrace.c to fix
 compilation

---
 src/common/backtrace.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/common/backtrace.c b/src/common/backtrace.c
index f0f499ac12..5049298a12 100644
--- a/src/common/backtrace.c
+++ b/src/common/backtrace.c
@@ -1,14 +1,15 @@
 /* Copyright (c) 2013, The Tor Project, Inc. */
 /* See LICENSE for licensing information */
 
+#define __USE_GNU
+#define _GNU_SOURCE 1
+
 #include "orconfig.h"
 #include "backtrace.h"
 #include "compat.h"
 #include "util.h"
 #include "torlog.h"
 
-#define __USE_GNU
-
 #ifdef HAVE_EXECINFO_H
 #include <execinfo.h>
 #endif