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

				// { dg-do compile }								// Copyright (C) 2001 Free Software Foundation, Inc.				// Contributed by Nathan Sidwell 19 Jan 2002 								// It is legal to specialize a template with a different class-key.								template class X;								template struct X				{				  int i;				};				template struct X				{				  int i;				};								void foo ()				{				  X xip;				  X xi;								  xip.i;				  xi.i;				}