From owner-freebsd-qa  Sat Sep  1 16:11:37 2001
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Date: Sat, 1 Sep 2001 16:10:54 -0700
From: Marcel Moolenaar <marcel@xcllnt.net>
To: John Baldwin <jhb@FreeBSD.org>
Cc: freebsd-stable@FreeBSD.org, qa@FreeBSD.org,
	Eric Masson <e-masson@kisoft-services.com>,
	Larry Rosenman <ler@lerctr.org>
Subject: Re: cputype=486
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References: <20010901114903.D11062@athlon.pn.xcllnt.net> <XFMail.010901132212.jhb@FreeBSD.org>
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On Sat, Sep 01, 2001 at 01:22:12PM -0700, John Baldwin wrote:
> 
> >> 
> >> Is *ANYTHING* going to be done about this ever?  It appears nothing
> >> was done at all during the 4.4 cycle. 
> > 
> > If I have some time (yeah, right :-) I'll take a look at it. The
> > quickest fix would be to define CPUTYPE as empty when building
> > cross- and build-tools. This should override any definitions that
> > are present in /etc/make.conf.
> 
> That doesn't help.  The problem is that the cross-tools built during buildworld
> are linked against the hosts' libc.a, and then run on the target machine in
> installworld.  Thus, in this case you end up running a 686 libc.a in the cross
> tool on a 486 and it blows up.
>  

Ah yes. In that case it only works if you link shared, but then you
have different problems. I guess this rules out CPUTYPE as a generic
tunable. If you want the highest possible performance, you give up
on portibility. You can't have it both...

-- 
 Marcel Moolenaar	  USPA: A-39004		 marcel@xcllnt.net

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