Date: Wed, 7 Mar 2001 10:37:22 +0000 From: David Malone <dwmalone@maths.tcd.ie> To: Kris Kennaway <kris@obsecurity.org> Cc: Jordan Hubbard <jkh@osd.bsdi.com>, ohartman@klima.physik.uni-mainz.de, freebsd-stable@FreeBSD.ORG Subject: Re: ARCH flag in new make.conf Message-ID: <20010307103722.A12299@walton.maths.tcd.ie> In-Reply-To: <20010307014139.A27133@mollari.cthul.hu>; from kris@obsecurity.org on Wed, Mar 07, 2001 at 01:41:39AM -0800 References: <Pine.BSF.4.33.0103070915530.17134-100000@klima.physik.uni-mainz.de> <20010307013439I.jkh@osd.bsdi.com> <20010307014139.A27133@mollari.cthul.hu>
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On Wed, Mar 07, 2001 at 01:41:39AM -0800, Kris Kennaway wrote: > No, I think you're overreacting significantly here -- there just isn't > a large amount of evidence showing that -march=<...> produces bad > code, and this is the first suggestion I've heard that it does so. In > fact, David O'Brien has been very supportive of the CPUTYPE code so > far, and he should know better than anyone which gcc optimizations are > dangerous on FreeBSD (e.g. he was the one who added the nasty warnings > for -O2 under alpha. I've seen gcc miscompile some code of mine, only when given -march=k6, it worked OK with -march=pentiumpro. Mind you, this may have been more than six months ago and may have been with -O2 or higher. There did seem to be a problem specific or triggered by -march though. David. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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