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netpython posted <3655f5d905072703096be71ed1@××××××××××.com>, excerpted |
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below, on Wed, 27 Jul 2005 10:09:35 +0000: |
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> Should i use -march=k8 or -march=athlon64 ? Or doesn't make any |
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> difference? My CPU is a AMD64 3000+ |
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At this point, it makes absolutely no difference. The two, along with |
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-march=opteron, and I think one or two other aliases, are internally set |
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to exactly the same thing in gcc. |
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There's a small chance that at some point in the future the hardware paths |
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of the current aliases will diverge enough to make splitting the alias a |
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possibility, but practically speaking, even if that /were/ to happen, the |
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new diverged version would very likely get a different name, so as to |
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preserve backward compatibility for all those who set their configuration |
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when they were all aliases. Thus, the chance of there actually being a |
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difference between what is now treated exactly the same, is in reality, |
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/very/ small, a small chance on a small chance. Odds of winning the |
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lottery or dieing in a car accident are likely far higher. |
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Here, I use -march=k8, simply because "k8" is a distinctive and short |
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enough string, it's easy to pick out in moving text, as the compile output |
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scrolls by, thus making it easier for me to verify my CFLAGS as part of |
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the settings fed to gcc as they fly by. Other than that, it's entirely |
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arbitrary. |
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-- |
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Duncan - List replies preferred. No HTML msgs. |
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"Every nonfree program has a lord, a master -- |
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and if you use the program, he is your master." Richard Stallman in |
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http://www.linuxdevcenter.com/pub/a/linux/2004/12/22/rms_interview.html |
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-- |
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