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Thank you. |
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What I'm trying to do is to compile in my Athlon XP in order to use |
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those same packages under a K6-2 and a Pentium-4. |
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I am not sure how the order of -march and -mtune/-mcpu should be. What I |
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want is to do code for Athlon XP without breaking the compatibility with |
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Pentium 4 and K6-2. |
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The flags I am currently using are the following: |
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CFLAGS="-O3 -march=i586 -mtune=athlon-xp -mtune=k6-2 -mtune=i586 |
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- -mtune=i686 -mmmx -fomit-frame-pointer -funroll-loops -pipe -fforce-addr |
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- -fforce-mem -fmove-all-movables" |
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I wonder whether there exists any way to obtain more optimized code |
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using the -march and -mcpu/-mtune flags. |
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Jason Wever wrote: |
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| On Sat, 21 Aug 2004, Ioannis Aslanidis wrote: |
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| |
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|>> Hi there! |
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|>> |
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|>> The line below |
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|>> |
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|>> `-mcpu=' is deprecated. Use `-mtune=' or '-march=' instead. |
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|>> |
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|>> showed up when emerging packages... is it because of GCC 3.4? |
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|>> |
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|>> So, does -mtune work as -mcpu? |
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| Note: This depends on which architecture you are on and may only apply |
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| to x86 (SPARC for instance has no -march value so -mcpu and -mtune have |
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| not changed for SPARC AFAIK). |
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| |
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| |
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| -- Jason Wever |
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| Gentoo/Sparc Co-Team Lead |
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