From owner-cvs-all  Wed Mar  7  1:46:18 2001
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Date: Wed, 7 Mar 2001 01:46:07 -0800
From: Kris Kennaway <kris@obsecurity.org>
To: Jordan Hubbard <jkh@osd.bsdi.com>
Cc: kris@obsecurity.org, jkh@FreeBSD.org, cvs-committers@FreeBSD.org,
	cvs-all@FreeBSD.org
Subject: -march considered harmful? (Re: cvs commit: src/etc/defaults make.conf)
Message-ID: <20010307014607.A34025@mollari.cthul.hu>
References: <200103070839.f278dVK30071@freefall.freebsd.org> <20010307005610.A54109@mollari.cthul.hu> <20010307013756K.jkh@osd.bsdi.com>
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In-Reply-To: <20010307013756K.jkh@osd.bsdi.com>; from jkh@osd.bsdi.com on Wed, Mar 07, 2001 at 01:37:56AM -0800
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On Wed, Mar 07, 2001 at 01:37:56AM -0800, Jordan Hubbard wrote:
> From: Kris Kennaway <kris@obsecurity.org>
> Subject: Re: cvs commit: src/etc/defaults make.conf
> Date: Wed, 7 Mar 2001 00:56:10 -0800
>=20
> > Uhh..evidence, please?
>=20
> Largely apocryphal, I'll admit, but I've heard enough rumblings from
> enough places about mysterious breakages that a warning appeared
> merited.  People like you who remain strongly convinced that there are
> no issues with gcc's architecture-specific optimization can ignore
> that comment and just go ahead and set it since it's not aimed at you
> anyway. :)

Since you don't have any real evidence I think this warning is
misguided and should be removed since there's no demonstrable risk
associated with using it, but significant performance benefit.
Compare that to the -O2 case, where it is easy to demonstrate code
which fails under it.

You are scaring people for no demonstrable reason.

Kris

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