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-rw-r--r--newlib/libc/include/sys/features.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/newlib/libc/include/sys/features.h b/newlib/libc/include/sys/features.h
index b2e56daae..db39bbba8 100644
--- a/newlib/libc/include/sys/features.h
+++ b/newlib/libc/include/sys/features.h
@@ -125,7 +125,7 @@ extern "C" {
#define _POSIX_SHARED_MEMORY_OBJECTS 200112L
#define _POSIX_SHELL 1
/* #define _POSIX_SPAWN -1 */
-/* #define _POSIX_SPIN_LOCKS -1 */
+#define _POSIX_SPIN_LOCKS 200112L
/* #define _POSIX_SPORADIC_SERVER -1 */
#define _POSIX_SYNCHRONIZED_IO 200112L
/* #define _POSIX_THREAD_ATTR_STACKADDR -1 */