From mboxrd@z Thu Jan  1 00:00:00 1970
From: Segher Boessenkool <segher@kernel.crashing.org>
Subject: Re: [PATCH 16/16] fix handling of integer constant expressions
Date: Mon, 25 Jun 2007 08:13:57 +0200
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To: Al Viro <viro@ftp.linux.org.uk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>, linux-kernel@vger.kernel.org, linux-sparse@vger.kernel.org

> Humm...  Right, so __builtin_offsetof() needs special treatment too.
> Oh, bugger.  Is
> 	offsetof(struct foo, a.x[n])
> a documented extension?

It is.  See  info gcc -> C Extensions -> Offsetof


Segher