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maxim wexler writes: |
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> > If so, Daniel's tip about 'gcc -Q --help=target -march=native' will give |
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> > you the exact options to use. |
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> See attachment please. Some stuff is enabled, some disabled, some blank. |
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Try this: |
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gcc -Q --help=target -march=native > /tmp/gccoptions.native |
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gcc -Q --help=target > /tmp/gccoptions.plain |
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diff /tmp/gccoptions.* |
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This will show the things that specifying -march=native turns on. Put this |
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in your CFLAGS, unless you use -march=native. |
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> And -march=prescott !? |
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Why not? Seems gcc 4.3 does not have the -march=atom optimization yet. It's |
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also suggested here: |
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http://en.gentoo-wiki.com/wiki/Safe_Cflags/Intel#Atom |
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Wonko |
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