www.wolfspakt.de/spiel.php?id=7358 On Wed, 8 Mar 2006 22:24:25 -0600 "Boyd Stephen Smith Jr." <[EMAIL PROTECTED]> wrote:
> On Wednesday 08 March 2006 21:49, "Kumar Golap" <[EMAIL PROTECTED]> > wrote about 'Re: [gentoo-user] equery, make.conf USE flag mismatch on > amd64': > > Apologies for not having done my research properly.... > > No problem, it happens. Truth be told it's probably more of a problem with > people being unable to /find/ the manual than being unwilling to /read/ > it. > > Besides, the age-old man command, and it's younger upstart info, are > quickly being deprecated in favor of simply pointing someone to a web > page. I find this unfortunate, at best. > > BTW, if you don't like consoles or fixed-width fonts make you itch, you can > always use a man:/ or info:/ URL in konqueror. (Not sure what the > Gnome/FB/BB/OB/ION/WMII/RP/other people use...) > > > > In this /specific/ case, you don't have to because the ebuilds and gcc > > > know that x86_64 CHOST means that mmx etc. ARE supported and they will > > > hard-enable them (you may not turn them off). > > > > Do you mean that, say, xawtv would have been built with mmx for an > > amd64 arch...despite that "equery uses" say its not ? Because that > > what confused me.... > > Yes. It will. The ebuild controls which arguments are passed to > configure/make so it can decide on the combination of you USE flags and > profile. I'm not sure if it is portage magic (the portage 'use' command > available in ebuilds doing some check on CHOST) or just ebuild maintainers > explicitly checking for an x86_64 CHOST, but you will get mmx/sse > optimizations without any special USE flags. > > You probably /should/ set your -march flag (or at least -mcpu) in CFLAGS, > so that gcc will optimize to your particular processor, including extended > instruction sets. > > -- > "If there's one thing we've established over the years, > it's that the vast majority of our users don't have the slightest > clue what's best for them in terms of package stability." > -- Gentoo Developer Ciaran McCreesh > -- > gentoo-user@gentoo.org mailing list >
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