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Date:      Wed, 7 Mar 2001 12:02:01 -0500
From:      Garance A Drosihn <drosih@rpi.edu>
To:        Kris Kennaway <kris@obsecurity.org>, Jordan Hubbard <jkh@osd.bsdi.com>
Cc:        kris@obsecurity.org, ohartman@klima.physik.uni-mainz.de, antony@abacus.co.uk, freebsd-stable@FreeBSD.ORG
Subject:   Re: ARCH flag in new make.conf
Message-ID:  <p05010401b6cc13dab354@[128.113.24.47]>
In-Reply-To: <20010307015036.A36721@mollari.cthul.hu>
References:  <20010307011446.A8574@mollari.cthul.hu> <Pine.BSF.4.33.0103071022560.17134-100000@klima.physik.uni-mainz.de> <20010307012454.A14664@mollari.cthul.hu> <20010307014323M.jkh@osd.bsdi.com> <20010307015036.A36721@mollari.cthul.hu>

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At 1:50 AM -0800 3/7/01, Kris Kennaway wrote:
>I can be confident it is not a dangerous option, having never seen
>code failure caused by it desipite extensive use for a long time.
>[...]  Given the number of people who use -march with no ill effects
>the 50/50 estimate is not very accurate.

And what is "the number of people who use -march with no ill effects"?
(ie, how many people do you know are using it, and what values are
they using?)

I definitely like the idea of this option, particularly if it means
optimizations in openssl.  However, I must admit I haven't actually
tried it yet, even though I think it is a good option.  Thus, I am
inclined to think it would be prudent to include some kind of warning
for the option in 4.3-release, although the wording used by Jordan
does seem a bit over-zealous.

Maybe something like
    If you experience problems while using this option, please
    remove all your object files and try another 'make buildworld'
    without any setting for this option.  There is some evidence
    that this option might cause trouble for installations using
    NIS/YP, for instance.  If this option does seem to cause
    problems for you, please let us know the details via a message
    to the freebsd-stable mailing list.

What I'm shooting for is something which would be helpful for
someone who DOES run into problems, and yet makes it clear that
this is an option we do WANT to work right, and we are actively
interested in fixing any problems which come up.
-- 
Garance Alistair Drosehn            =   gad@eclipse.acs.rpi.edu
Senior Systems Programmer           or  gad@freebsd.org
Rensselaer Polytechnic Institute    or  drosih@rpi.edu

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