[PATCH] perf tools: Add _GNU_SOURCE macro for strndup()

[Liming Wang]

strndup is a GNU extension. So add _GNU_SOURCE macro
to avoid compiling error.

Signed-off-by: Liming Wang <liming.wang@xxxxxxxxxxxxx>
Acked-by: Frederic Weisbecker <fweisbec@xxxxxxxxx>
---
 tools/perf/util/string.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/tools/perf/util/string.c b/tools/perf/util/string.c
index 0977cf4..ea3eb39 100644
--- a/tools/perf/util/string.c
+++ b/tools/perf/util/string.c
@@ -1,5 +1,8 @@
+#define _GNU_SOURCE
 #include <string.h>
 #include <stdlib.h>
+
+#undef _GNU_SOURCE
 #include "string.h"
 #include "util.h"
 
-- 
1.6.0.3

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