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 a5bb1e2..8ec5c6f 100644 (file)
--- a/include/setjmp.h
+++ b/include/setjmp.h
@@ -5,28 +5,38 @@
 extern "C" {
 #endif
 
+#if __STDC_VERSION__ >= 201112L
+#elif defined(__GNUC__)
+#define _Noreturn __attribute__((__noreturn__))
+#else
+#define _Noreturn
+#endif
+
 #include <bits/setjmp.h>
 
 
 #if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
- || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
-typedef unsigned long sigjmp_buf[(1024+sizeof(jmp_buf))/sizeof(long)];
-#ifdef _GNU_SOURCE
-#define jmp_buf sigjmp_buf
-#endif
+ || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) \
+ || defined(_BSD_SOURCE)
+typedef struct {
+       jmp_buf __jb;
+       unsigned long __fl;
+       unsigned long __ss[128/sizeof(long)];
+} sigjmp_buf[1];
 int sigsetjmp (sigjmp_buf, int);
 void siglongjmp (sigjmp_buf, int);
 #endif
 
 
-#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
+#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) \
+ || defined(_BSD_SOURCE)
 int _setjmp (jmp_buf);
 void _longjmp (jmp_buf, int);
 #endif
 
 
 int setjmp (jmp_buf);
-void longjmp (jmp_buf, int);
+_Noreturn void longjmp (jmp_buf, int);
 
 #define setjmp setjmp
 #define longjmp longjmp