From 667988ce9e2a051ff608b727f6c89a5baa01fa67 Mon Sep 17 00:00:00 2001
From: Nan Xiao <xiao_nan@dsi.a-star.edu.sg>
Date: Mon, 28 Aug 2017 11:44:19 +0800
Subject: [PATCH] Fix _GNU_SOURCE redefined warning

---
 src/cc/libbpf.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/cc/libbpf.c b/src/cc/libbpf.c
index 0da8e2c0..928d7d79 100644
--- a/src/cc/libbpf.c
+++ b/src/cc/libbpf.c
@@ -13,7 +13,9 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+#ifndef _GNU_SOURCE
 #define _GNU_SOURCE
+#endif
 
 #include <arpa/inet.h>
 #include <errno.h>
-- 
2.34.1