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

				// Build don't link:								class A {				protected:				  static void f() {};				};								class B : A {				public:				  using A::f;				  void g() {				    f();				    A::f();				  }				  struct C {				    void g() {				      f();				      A::f();				    }				  };				};