Date: Wed, 15 Mar 2000 23:11:04 -0800 From: Doug Barton <Doug@gorean.org> To: Christian Weisgerber <naddy@mips.rhein-neckar.de> Cc: freebsd-current@freebsd.org Subject: Re: gcc -Os optimisation broken (RELENG_4) Message-ID: <38D08908.C629B55E@gorean.org> 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" To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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