#ifndef _STDDEF_H
#define _STDDEF_H
-#undef NULL
-#ifdef __cplusplus
-#define NULL 0
-#else
-#define NULL ((void*)0)
-#endif
+#define NULL 0L
#define __NEED_ptrdiff_t
#define __NEED_size_t
#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 ))
+#endif
#endif