add _Noreturn function attribute, with fallback for pre-C11 GNUC

[musl] / include / setjmp.h

diff --git a/include/setjmp.h b/include/setjmp.h
index 7dc7276..8ec5c6f 100644 (file)
--- a/include/setjmp.h
+++ b/include/setjmp.h
@@ -5,6 +5,13 @@
 extern "C" {
 #endif
 
+#if __STDC_VERSION__ >= 201112L
+#elif defined(__GNUC__)
+#define _Noreturn __attribute__((__noreturn__))
+#else
+#define _Noreturn
+#endif
+
 #include <bits/setjmp.h>
 
 
@@ -29,7 +36,7 @@ void _longjmp (jmp_buf, int);
 
 
 int setjmp (jmp_buf);
-void longjmp (jmp_buf, int);
+_Noreturn void longjmp (jmp_buf, int);
 
 #define setjmp setjmp
 #define longjmp longjmp