libubus: define _GNU_SOURCE, needed for O_CLOEXEC

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

diff --git a/libubus-io.c b/libubus-io.c
index fa53040..9d3ac6c 100644 (file)
--- a/libubus-io.c
+++ b/libubus-io.c
@@ -11,6 +11,7 @@
  * GNU General Public License for more details.
  */
 
+#define _GNU_SOURCE
 #include <sys/types.h>
 #include <sys/uio.h>
 #include <sys/socket.h>