offset4.c

gcc-you can use this code to learn something about gcc, and inquire further into linux,

// Bug: g++ complains about the use of A::p below.
// Build don't link:

struct A {
  void *p;
};

struct B: public A {
  int f ()
    {
      if (A::p)
	return 1;
      return 0;
    }
};