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On Saturday 10 Nov 2007 00:30 in article <9nMoI-4go-13@×××××××××××××.it> |
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of linux.gentoo.user, Stefan G. Weichinger(lists@×××××.at) wrote: |
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> Greets, I recently bought a new CPU for my mythtv-box, it's a Pentium |
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> Dual E2160 .... |
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> |
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> Currently I use |
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> |
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> CFLAGS="-O2 -march=pentium4 -pipe -fomit-frame-pointer" |
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> |
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> as I moved the system over from a Pentium 4 (which just crashed). |
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You need to consider CHOST as well, to ensure you make the most of the |
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newer CPUs. |
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Here is what I use on an E6600 machine: |
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CHOST="x86_64-pc-linux-gnu" |
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CFLAGS="-march=nocona -mmmx -m3dnow -msse -msse2 -msse3 -mfpmath=sse,387 -O2 -pipe" |
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Note that -fomit-frame-pointer is not applicable on AMD64/EM64T hardware |
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platforms; it will be silently ignored by GCC. Most of the additional |
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processor features I have specified (MMX, SSE/2/3, 3DNow!) are actually |
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implied by the -march=nocona, but I specify as a mnemonic to myself |
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that these are [potentially] in use on this box. |
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If you simply restored from a Pentium 4 system you will need to take the |
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steps to change the CHOST. This is documented on the Gentoo web site. |
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-- |
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Regards |
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|
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Dave [RLU#314465] |
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====================================================== |
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dwnoon@××××××××.com (David W Noon) |
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====================================================== |
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-- |
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gentoo-user@g.o mailing list |
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