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-rw-r--r--util-src/pposix.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/util-src/pposix.c b/util-src/pposix.c
index 215c45c3..656bda07 100644
--- a/util-src/pposix.c
+++ b/util-src/pposix.c
@@ -17,11 +17,17 @@
#if defined(__linux__)
+#ifndef _GNU_SOURCE
#define _GNU_SOURCE
+#endif
#else
+#ifndef _DEFAULT_SOURCE
#define _DEFAULT_SOURCE
#endif
+#endif
+#ifndef _POSIX_C_SOURCE
#define _POSIX_C_SOURCE 200809L
+#endif
#include <stdlib.h>
#include <math.h>