From 8198bb580a5640415e09b8fd3533ffaa11317ca6 Mon Sep 17 00:00:00 2001
From: Even Rouault <even.rouault@spatialys.com>
Date: Tue, 18 Dec 2018 22:02:44 +0100
Subject: cpp conversion: fix remaining warnings

---
 src/pj_mutex.cpp | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'src/pj_mutex.cpp')

diff --git a/src/pj_mutex.cpp b/src/pj_mutex.cpp
index 61487cec..3752324c 100644
--- a/src/pj_mutex.cpp
+++ b/src/pj_mutex.cpp
@@ -34,7 +34,9 @@
 #endif
 
 /* For PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP */
+#ifndef _GNU_SOURCE
 #define _GNU_SOURCE
+#endif
 
 #ifndef _WIN32
 #include "proj_config.h"
-- 
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