#define ENOTSUP 252 /* Function not implemented (POSIX.4 / HPUX) */
#define ECANCELLED 253 /* aio request was canceled before complete (POSIX.4 / HPUX) */
+/* for robust mutexes */
+#define EOWNERDEAD 254 /* Owner died */
+#define ENOTRECOVERABLE 255 /* State not recoverable */
+
#endif