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Diffstat (limited to 'system/include/libc/sys/features.h')
-rw-r--r--system/include/libc/sys/features.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/system/include/libc/sys/features.h b/system/include/libc/sys/features.h
index 87a520a0..8c32bf04 100644
--- a/system/include/libc/sys/features.h
+++ b/system/include/libc/sys/features.h
@@ -26,7 +26,10 @@ extern "C" {
#endif
#if EMSCRIPTEN
-#define _POSIX_REALTIME_SIGNALS 1
+#define _POSIX_REALTIME_SIGNALS 1
+#define _POSIX_THREADS 200112L
+#define _UNIX98_THREAD_MUTEX_ATTRIBUTES 1
+#define _POSIX_READER_WRITER_LOCKS 200112L
#endif
/* RTEMS adheres to POSIX -- 1003.1b with some features from annexes. */