From: Robert Love <rml@tech9.net>
To: Martin Devera <devik@cdi.cz>
Cc: Chris Meadors <clubneon@hereintown.net>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: gcc 3.0.2/kernel details (-O issue)
Date: 19 Dec 2001 15:03:30 -0500 [thread overview]
Message-ID: <1008792213.806.36.camel@phantasy> (raw)
In-Reply-To: <Pine.LNX.4.10.10112192037490.3265-100000@luxik.cdi.cz>
In-Reply-To: <Pine.LNX.4.10.10112192037490.3265-100000@luxik.cdi.cz>
On Wed, 2001-12-19 at 14:39, Martin Devera wrote:
> It is interesting that 2.2 can be done with -O. Also I'd expect
> errors during compilation and not silent crash...
Well, you certainly won't get errors, because compiler optimizations
shouldn't change expected syntax.
-O2 is the standard optimization level for the kernel; everything is
compiled via it. When developers test their code, nuances that the
optimization introduce are accepted. Removing the optimization may
break those expectations. Thus the kernel requires it.
Robert Love
next prev parent reply other threads:[~2001-12-19 20:03 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-12-19 18:55 gcc 3.0.2/kernel details (-O issue) devik
2001-12-19 19:49 ` Chris Meadors
2001-12-19 19:39 ` Martin Devera
2001-12-19 20:03 ` Robert Love [this message]
2001-12-20 0:10 ` Erik Mouw
2001-12-20 3:39 ` H. Peter Anvin
2001-12-20 9:22 ` J.A. Magallon
2001-12-20 12:03 ` H. Peter Anvin
2001-12-20 10:30 ` devik
2001-12-22 20:54 ` Pavel Machek
2001-12-22 23:35 ` devik
2001-12-22 23:54 ` J.A. Magallon
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