[PATCH 2/3] libperf: avoid redefining _GNU_SOURCE in test

[Ian Rogers]

_GNU_SOURCE needs to be globally defined to pick up features like
asprintf. Add a guard against redefinition in this test.

Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
---
 tools/lib/perf/tests/test-evlist.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/lib/perf/tests/test-evlist.c b/tools/lib/perf/tests/test-evlist.c
index 6d8ebe0c2504..5a5ff104b668 100644
--- a/tools/lib/perf/tests/test-evlist.c
+++ b/tools/lib/perf/tests/test-evlist.c
@@ -1,5 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
+#ifndef _GNU_SOURCE
 #define _GNU_SOURCE // needed for sched.h to get sched_[gs]etaffinity and CPU_(ZERO,SET)
+#endif
 #include <sched.h>
 #include <stdio.h>
 #include <stdarg.h>
-- 
2.25.1.481.gfbce0eb801-goog