On Tuesday 16 May 2006 16:18, John Jolet <[EMAIL PROTECTED]> wrote about 'Re: [gentoo-user] Re: USE flags for amd64 (running in 32 bit)': > maybe that was my misunderstading..on a brand-new opteron 64-bit...the > architecture use flag i use is k8. I see no real reason to run 32-bit > gentoo on a 64-bit box...64-bit support in gentoo was why we switched > distros when we switched to 64-bit servers. my -march is k8 for those > boxes.
If you are using an honest-to-goodness Opteron, and a relatively recent gcc, you should be using -march=opteron, as I am, unless you build binary packages to install on non-Opteron systems. Opteron = MMX, MMX2, SSE, SSE2, SSE3, 3dNow!, 3dNow! <something else>, plus scheduling optimizations for Opteron and maybe some other things I'm not remembering. -- "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
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