unsigned long __ss[128/sizeof(long)];
} jmp_buf[1];
+#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1)
+#define __setjmp_attr __attribute__((__returns_twice__))
+#else
+#define __setjmp_attr
+#endif
+
#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
|| defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) \
|| defined(_BSD_SOURCE)
typedef jmp_buf sigjmp_buf;
-int sigsetjmp (sigjmp_buf, int);
+int sigsetjmp (sigjmp_buf, int) __setjmp_attr;
_Noreturn void siglongjmp (sigjmp_buf, int);
#endif
#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) \
|| defined(_BSD_SOURCE)
-int _setjmp (jmp_buf);
+int _setjmp (jmp_buf) __setjmp_attr;
_Noreturn void _longjmp (jmp_buf, int);
#endif
-int setjmp (jmp_buf);
+int setjmp (jmp_buf) __setjmp_attr;
_Noreturn void longjmp (jmp_buf, int);
#define setjmp setjmp
+#undef __setjmp_attr
+
#ifdef __cplusplus
}
#endif