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On Thursday 12 October 2006 12:34, "Selso DaSilva" <selsok@×××××.com> wrote |
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about '[gentoo-user] compiling gentoo on P4 for a PII': |
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> Is their a way to have gentoo |
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> installed on a P4 but compiling for the PII/PIII? |
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|
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The -march= value in your CFLAGS (on the machine building the image / |
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packages / binaries ) should be the lowest common denominator for any CPU |
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that will run the compiled binaries / install the built packages / receive |
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the imaged HD. While the code generated under -march=pentium-4 might run |
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on a PII, it's not guaranteed. Of course, CHOST should also be set to the |
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common denominator but everything Intel above and including the PII is |
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686. |
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|
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You can use a -mtune= value in your CFLAGS to optimize intruction |
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scheduling for a particular processor, generally the most common in |
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your "fleet". The code generated under -mtune=pentium-4 will run on a |
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PII. -mtune may make scheduling decisions that adversely affect |
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performance on processors other than the one specified to improve |
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performance on the chosen processor. |
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|
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-- |
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"If there's one thing we've established over the years, |
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it's that the vast majority of our users don't have the slightest |
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clue what's best for them in terms of package stability." |
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-- Gentoo Developer Ciaran McCreesh |
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