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

2 files changed, 19 insertions, 5 deletions

diff --git a/include/setjmp.h b/include/setjmp.h
index 7dc72767..8ec5c6f1 100644
--- 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
diff --git a/include/stdlib.h b/include/stdlib.h
index 14cc71bb..86cf0171 100644
--- a/include/stdlib.h
+++ b/include/stdlib.h
@@ -11,6 +11,13 @@ extern "C" {
 #define __restrict
 #endif
 
+#if __STDC_VERSION__ >= 201112L
+#elif defined(__GNUC__)
+#define _Noreturn __attribute__((__noreturn__))
+#else
+#define _Noreturn
+#endif
+
 #undef NULL
 #ifdef __cplusplus
 #define NULL 0
@@ -46,12 +53,12 @@ void *realloc (void *, size_t);
 void free (void *);
 void *aligned_alloc(size_t alignment, size_t size);
 
-void abort (void);
+_Noreturn void abort (void);
 int atexit (void (*) (void));
-void exit (int);
-void _Exit (int);
+_Noreturn void exit (int);
+_Noreturn void _Exit (int);
 int at_quick_exit (void (*) (void));
-void quick_exit (int);
+_Noreturn void quick_exit (int);
 
 char *getenv (const char *);