--- /dev/null
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+int main ()
+{
+struct foo {
+ unsigned base:8;
+ unsigned flag1:1;
+ unsigned flag2:3;
+ unsigned flag3:4;
+ char nothing[0];
+};
+
+#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *) 0)->MEMBER)
+
+struct foo* f = (struct foo *) malloc (offsetof (struct foo, nothing));
+f->base = 1;
+f->flag1 = 1;
+free (f);
+
+
+return 0;
+}