X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=include%2Fsetjmp.h;h=1976af231b8c4acee1a4115c20afb48d12a85d6a;hb=a4b0a665b84c4a3117cca152fe28c204d23ece46;hp=2d43abf84f54ad9fc9501e0204816579c9b0de99;hpb=5e25d87b09d1dafc527833d9b4e9a6de99b79aab;p=musl

diff --git a/include/setjmp.h b/include/setjmp.h
index 2d43abf8..1976af23 100644
--- a/include/setjmp.h
+++ b/include/setjmp.h
@@ -15,25 +15,33 @@ typedef struct __jmp_buf_tag {
 	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