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use __builtin_offsetof to implement offsetof when possible
[musl]
/
include
/
stddef.h
diff --git
a/include/stddef.h
b/include/stddef.h
index
dbf5a4a
..
a5bb9ec
100644
(file)
--- a/
include/stddef.h
+++ b/
include/stddef.h
@@
-14,6
+14,10
@@
#include <bits/alltypes.h>
#include <bits/alltypes.h>
+#if __GNUC__ > 3
+#define offsetof(type, member) __builtin_offsetof(type, member)
+#else
#define offsetof(type, member) ((size_t)( (char *)&(((type *)0)->member) - (char *)0 ))
#define offsetof(type, member) ((size_t)( (char *)&(((type *)0)->member) - (char *)0 ))
+#endif
#endif
#endif