The top-level Makefile defines _GNU_SOURCE by default which causes the
following build warning:
cc -g -O0 -Wall -D_GNU_SOURCE userns_child_exec.c -o userns_child_exec
userns_child_exec.c:11:0: warning: "_GNU_SOURCE" redefined
#define _GNU_SOURCE
... this patch first checks to see if _GNU_SOURCE is defined before
defining it again. We're doing it this way, instead of removing it
entirely so that the test will still work outside the testsuite.
Signed-off-by: Paul Moore <paul@xxxxxxxxxxxxxx>
---
tests/cap_userns/userns_child_exec.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/tests/cap_userns/userns_child_exec.c b/tests/cap_userns/userns_child_exec.c
index 26ea357..e31bf71 100644
--- a/tests/cap_userns/userns_child_exec.c
+++ b/tests/cap_userns/userns_child_exec.c
@@ -8,7 +8,11 @@
namespace(s); allow UID and GID mappings to be specified when
creating a user namespace.
*/
+
+#ifndef _GNU_SOURCE
#define _GNU_SOURCE
+#endif
+
#include <sched.h>
#include <unistd.h>
#include <stdlib.h>
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