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

				// { dg-do compile }								// Copyright (C) 2003 Free Software Foundation, Inc.				// Contributed by Nathan Sidwell 19 Apr 2003 								// PR 10405. ICE								#define MEM_ENUM(name) int name; enum name {};								struct Base				{				  MEM_ENUM (a)				  MEM_ENUM (b)				  MEM_ENUM (c)				  MEM_ENUM (d)				  MEM_ENUM (e)				  MEM_ENUM (f)				  MEM_ENUM (g)				  MEM_ENUM (h)				  MEM_ENUM (i)				  MEM_ENUM (j)				  MEM_ENUM (k)				  MEM_ENUM (l)				  MEM_ENUM (m)				  MEM_ENUM (n)				  MEM_ENUM (o)				  MEM_ENUM (p)				  MEM_ENUM (q)				  MEM_ENUM (r)				  MEM_ENUM (s)				  MEM_ENUM (t)				  MEM_ENUM (u)				  MEM_ENUM (v)				  MEM_ENUM (w)				    };								struct D : Base  {};