From 24db559f0bf05c2a4e61f9f1fdb7ee0393a0d6b5 Mon Sep 17 00:00:00 2001
From: Eric Fischer <enf@pobox.com>
Date: Wed, 27 Apr 2016 15:12:03 -0700
Subject: [PATCH] Fix complaint about duplicate #define

---
 mbtiles.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mbtiles.cpp b/mbtiles.cpp
index 697630c..8015334 100644
--- a/mbtiles.cpp
+++ b/mbtiles.cpp
@@ -1,5 +1,7 @@
 // for vasprintf() on Linux
+#ifndef _GNU_SOURCE
 #define _GNU_SOURCE
+#endif
 
 #include <stdio.h>
 #include <stdlib.h>