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-rw-r--r--newlib/libc/include/sys/features.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/newlib/libc/include/sys/features.h b/newlib/libc/include/sys/features.h
index 1fa542789..bc40f0068 100644
--- a/newlib/libc/include/sys/features.h
+++ b/newlib/libc/include/sys/features.h
@@ -73,6 +73,9 @@ extern "C" {
#define _POSIX_INTERRUPT_CONTROL 1
#define _POSIX_ADVISORY_INFO 1
+/* UNIX98 added some new pthread mutex attributes */
+#define _UNIX98_THREAD_MUTEX_ATTRIBUTES 1
+
#endif
/* XMK loosely adheres to POSIX -- 1003.1 */