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-rw-r--r--cpukit/score/cpu/unix/cpu.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/cpukit/score/cpu/unix/cpu.c b/cpukit/score/cpu/unix/cpu.c
index 428ae99c3b..a8fa6bb4d3 100644
--- a/cpukit/score/cpu/unix/cpu.c
+++ b/cpukit/score/cpu/unix/cpu.c
@@ -15,6 +15,7 @@
#include <rtems/score/interr.h>
#if defined(__linux__)
+#define _XOPEN_SOURCE
#define MALLOC_0_RETURNS_NULL
#endif