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Date: Thu, 25 Dec 2003 22:04:43 -0800
From: "H. Peter Anvin" <hpa@zytor.com>
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To: Linus Torvalds <torvalds@osdl.org>
CC: linux-kernel@vger.kernel.org
Subject: Re: GCC 3.4 Heads-up
References: <1072403207.17036.37.camel@clubneon.clubneon.com> <bsgav5$4qh$1@cesium.transmeta.com> <Pine.LNX.4.58.0312252021540.14874@home.osdl.org>
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Linus Torvalds wrote:
> 
> Similarly, what the _hell_ does the gcc extension
> 
> 	int a;
> 
> 	(char)a += b;
> 
> really mean? The whole extension is just braindamaged, again probably 
> because there were non-C people involved at some point. It's very much 
> against the C philosophy. I bet 99% of the people on this list have no 
> clue what the exact semantics of the above are.
> 

Oh, right.  When I heard "cast as lvalue" I envisioned:

*(char *)foo = bar;

... being a warning, but that's not a cast, even though the pointer is.

	-hpa