From owner-freebsd-current  Wed Mar 15 23:11:13 2000
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Date: Wed, 15 Mar 2000 23:11:04 -0800
From: Doug Barton <Doug@gorean.org>
Organization: Triborough Bridge & Tunnel Authority
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To: Christian Weisgerber <naddy@mips.rhein-neckar.de>
Cc: freebsd-current@freebsd.org
Subject: Re: gcc -Os optimisation broken (RELENG_4)
References: <38CF48CF.59A100D7@altavista.net> <8ap8qe$hvj$1@bigeye.rhein-neckar.de>
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Christian Weisgerber wrote:
> 
> Maxim Sobolev <sobomax@mail.ru> wrote:
> 
> > I've just upgraded my production server to the 4.0-RELEASE and found that
> > squid23 when compiled with -Os option dying with signal 11 on each attempt to
> > load page. When I recompiled it with -O fault disappeared.
> 
> Which brings us back to the popular topic of which optimization
> levels are reliable.
> 
> Building 5.0-CURRENT with "-Os -mpentium" failed for me with gas
> complaining (unknown opcode I think, but don't hold me to it). I
> went back to "-O -mpentium" and that worked fine. On another machine,
> "-O2 -mpentiumpro" worked, too.

	Hmm... If I have a PII (Actually celeron 300A) or a PIII, which is
better, 'pentium' or 'pentiumpro'? I would think the latter, but I've
learned not to assume where gcc is concerned.

	Also, I have heard conflicting reports as to whether compiling the
kernel/world with optimisations is a good thing. Anyone care to (re)open
that can of worms?

Thanks,

Doug
-- 
  "While the future's there for anyone to change, still you know it
seems, 
   it would be easier sometimes to change the past"

       - Jackson Browne, "Fountain of Sorrow"


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