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Etaoin Shrdlu wrote: |
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> On Monday 18 December 2006 19:06, Mark Haney wrote: |
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> |
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>> I've been using -mcpu since I started using gentoo, but have been |
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>> noticing the '-mcpu is deprecated etc.' messages when updating. Being |
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>> the paranoid I am, I'd like to get rid of those, but haven't found the |
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>> correct option to use for -march. Is it the same as -mcpu? Or what's |
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>> the correct one for amd64? |
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> |
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> You can use -mtune in place of -mcpu. If you don't need binary |
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> compatibility with other CPUs, you should use -march. Speaking of |
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> which...that really depends. "amd64" means a lot of CPUs, including AMD |
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> and Intel models. What's your CPU? |
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> |
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> According to [1], you should set -march=k8 for AMD CPUs (non-EM64T) |
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> and -march=nocona for Intel ones (EM64T). But, for AMD athlon64 X2, you |
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> can also use -march=athlon64. [2] is a good reference, IMHO. |
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> |
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> If you want to optimize further, the forums have lots of threads devoted |
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> to CFLAGS optimization. |
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> |
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> [1] http://www.gentoo.org/doc/en/gentoo-amd64-faq.xml#cflags |
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> [2] http://gentoo-wiki.com/Safe_Cflags |
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All the suggestions I have received have been great. As for my CPU it's |
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a standard Athlon64 sitting in a Compaq laptop. Nothing particularly |
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outside the norm. |
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Thanks again for all the answers. |
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-- |
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Ita erat quando hic adveni. |
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|
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Mark Haney |
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Sr. Systems Administrator |
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ERC Broadband |
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(828) 350-2415 |
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-- |
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