Date: Fri, 22 Feb 2013 14:17:50 -0800 From: John-Mark Gurney <jmg@funkthat.com> To: Dimitry Andric <dimitry@andric.com> Cc: lev@freebsd.org, freebsd-current <freebsd-current@freebsd.org> Subject: Re: r245741 (clang as cc) can not build binaries for GEODE processor Message-ID: <20130222221750.GB55866@funkthat.com> In-Reply-To: <5127997A.2000901@andric.com> References: <108875110.20130222104603@serebryakov.spb.ru> <51277EFE.4000703@andric.com> <15917508.20130222194954@serebryakov.spb.ru> <5127997A.2000901@andric.com>
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Dimitry Andric wrote this message on Fri, Feb 22, 2013 at 17:14 +0100: > On 2013-02-22 16:49, Lev Serebryakov wrote: > >You wrote 22 ?????????????? 2013 ??., 18:21:50: > > > >DA> The default for FreeBSD on 32-bit x86 is i486, so maybe the problems > >are > >DA> caused by the -march=geode setting. If you disable that, do the > >DA> problems disappear? > > Problem is, that code compiled with "-march=geode" works. Code > >built without any "-march" at all (without CPUTYPE in configs) doesn't. > > It looks like clang or use "build system" CPU as default "-march" or > >issue some >= i686 commands without it. Or both :) > > Clang defaults to i486 (that is, on i386-unknown-freebsdXX arch), unless > you specify -march= or -mcpu= on the command line. > > Maybe samba, or any of its dependencies, attempts to be "smart", and > enables some custom CPU optimizations? Clang is broken when compiling for pre-PPro machines... it compiles include the cmov instruction. I sent email to -current about this earlier this month in: Subject: -current broken on pre-PPro machines (w/ work around) http://www.freebsd.org/cgi/mid.cgi?20130201170737.GP1410@funkthat.com The work around is to use gcc which will not emit the cmov instructions... -- John-Mark Gurney Voice: +1 415 225 5579 "All that I will do, has been done, All that I have, has not."
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