// Test to see that primary bases are selected correctly.// Origin: Mark Mitchell <mark@codesourcery.com>#if defined (__GXX_ABI_VERSION) && __GXX_ABI_VERSION >= 100// S1 is a nearly-empty base.struct S1{  virtual void f ()  {  }};// S2 is a dynamic, but not nearly-empty, base.struct S2{  virtual void g ()  {  }      int i;};// S1 should be the primary base.struct T1 : public S1, public S2{};// S2 should be the primary base.struct T2 : public S2, public S1{};// S2 should be the primary base.struct T3 : virtual public S1, public S2{};// S1 should be the primary base.struct T4 : virtual public S1, virtual public S2{};// Check that Y is the primary base for X.  Otherwise, return N.#define CHECK_PRIMARY_BASE(X, Y, N)		\  {						\    X x;					\    if ((void*) &x != (void *) (Y*) (&x))	\      return N;					\  }int main (){  CHECK_PRIMARY_BASE (T1, S1, 1);  CHECK_PRIMARY_BASE (T2, S2, 2);  CHECK_PRIMARY_BASE (T3, S2, 3);  CHECK_PRIMARY_BASE (T4, S1, 4);}#else /* !(defined (__GXX_ABI_VERSION) && __GXX_ABI_VERSION >= 100) */int main () {}#endif /* !(defined (__GXX_ABI_VERSION) && __GXX_ABI_VERSION >= 100) */