1 files changed, 20 insertions, 0 deletions

diff --git a/include/stdlib.h b/include/stdlib.h
index a593345aa601..afcbc289b37e 100644
--- a/include/stdlib.h
+++ b/include/stdlib.h
@@ -323,6 +323,26 @@ __uint64_t
 
 extern char *suboptarg;			/* getsubopt(3) external variable */
 #endif /* __BSD_VISIBLE */
+
+#if __EXT1_VISIBLE
+
+#ifndef _ERRNO_T_DEFINED
+#define _ERRNO_T_DEFINED
+typedef int errno_t;
+#endif
+
+/* K.3.6 */
+typedef void (*constraint_handler_t)(const char * __restrict,
+    void * __restrict, errno_t);
+/* K.3.6.1.1 */
+constraint_handler_t set_constraint_handler_s(constraint_handler_t handler);
+/* K.3.6.1.2 */
+_Noreturn void abort_handler_s(const char * __restrict, void * __restrict,
+    errno_t);
+/* K3.6.1.3 */
+void ignore_handler_s(const char * __restrict, void * __restrict, errno_t);
+#endif /* __EXT1_VISIBLE */
+
 __END_DECLS
 __NULLABILITY_PRAGMA_POP