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Date:      Sun, 28 Jul 2002 16:14:25 +0200
From:      Bernd Walter <ticso@cicely5.cicely.de>
To:        "David O'Brien" <obrien@FreeBSD.org>, John Baldwin <jhb@FreeBSD.org>, cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject:   Re: cvs commit: src/share/mk bsd.cpu.mk
Message-ID:  <20020728141424.GH97768@cicely5.cicely.de>
In-Reply-To: <20020728033812.GA86714@dragon.nuxi.com>
References:  <200207272204.g6RM46Ji040820@freefall.freebsd.org> <20020727221313.C48442A7D6@canning.wemm.org> <20020728033812.GA86714@dragon.nuxi.com>

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On Sat, Jul 27, 2002 at 08:38:12PM -0700, David O'Brien wrote:
> On Sat, Jul 27, 2002 at 03:13:13PM -0700, Peter Wemm wrote:
> > >   This defaults to tuning i386 builds for i686 machines though not using
> > >   any instructions that aren't found on an 80386.  For alpha it defaults
> > >   to tuning for an EV5.
> 
> EV56 please.  Maybe even EV6.

ev56 will break compatibility with many supported older machines.
What happens with releases and packages?
This situation is a bit different than loosing 80386 support in
the binaries where we can expect owners to have acces to at least a
pentium to build the binaries their self.

Please add at least a note in UPDATING so non BWX owners don't
forget to update their /etc/make.conf.
EV6 would be a bad default as it includes Multimedia extensions which
are not available on ev56 machines and exclude much more machines
without such a big performance win.
Also it would break kernel builds as we explicitly tell the assembler
to understand ev56 assembly - maybe it's a good idea to just raise that.


-- 
B.Walter              COSMO-Project         http://www.cosmo-project.de
ticso@cicely.de         Usergroup           info@cosmo-project.de


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