Add stddef.h header with offsetof() macro

diff --git a/include/stddef.h b/include/stddef.h
new file mode 100644 (file)
index 0000000..2876200
--- /dev/null
+++ b/include/stddef.h
@@ -0,0 +1,8 @@
+#ifndef _STDDEF_H
+#define _STDDEF_H
+
+#include <sys/types.h>
+
+#define offsetof(type, member) ((size_t)&(((type*)0)->member))
+
+#endif /* _STDDEF_H */