-#if (__GNUC__ == 4)
-#define __compiler_offsetof(a, b) __builtin_offsetof(a, b)
-#endif
-
-#ifdef __compiler_offsetof
-#define offsetof(TYPE, MEMBER) __compiler_offsetof(TYPE, MEMBER)
-#else
-#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
-#endif
-