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-rw-r--r--src/sched_deadline/cyclicdeadline.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/sched_deadline/cyclicdeadline.c b/src/sched_deadline/cyclicdeadline.c
index 9c50456..f530488 100644
--- a/src/sched_deadline/cyclicdeadline.c
+++ b/src/sched_deadline/cyclicdeadline.c
@@ -1,4 +1,6 @@
+#ifndef _GNU_SOURCE
#define _GNU_SOURCE
+#endif
#include <pthread.h>
#include <stdarg.h>
#include <stdlib.h>