this is a gcc file, you can download it and learn its usetility, for further detail please look at t

				// Test that statics in inline functions are unified between				// translation units.  Currently we handle this by just suppressing				// inling and relying on unification of the function itself.								// Special g++ Options: -O								// Additional sources: comdat2-aux.cc								template 				struct S {				  static int f ()				  {				    static int i;				    return ++i;				  }				  S () {};				  ~S () {};				};								typedef S a;								int g ();								int main ()				{				  if (a::f() != 1				      || g() != 2				      || a::f() != 3)				    return 1;				  return 0;				}