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On 00:30 Mon 15 Nov , Diego Elio Pettenò wrote: |
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> Il giorno dom, 14/11/2010 alle 22.03 +0100, Thomas Kahle ha scritto: |
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> > I have a package (sci-libs/mpir) whose configure supports building of |
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> > fat binaries with both x86 and amd64 assembler in the binary. |
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> |
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> Oh the heck are they implemented? If they are FatELF, no they shouldn't |
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> be used, ever, full stop. |
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They don't tell. From the manual: |
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Fat binary, ‘--enable-fat’ |
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Using ‘--enable-fat’ selects a “fat binary” build on x86 or x86 64 |
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systems, where optimized low level subroutines are chosen at runtime |
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according to the CPU de- tected. This means more code, but gives |
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reasonable performance from a single bi- nary for all x86 chips, or |
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similarly for all x86 64 chips. (This option might become available for |
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more architectures in the future.) |
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Cheers, |
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Thomas |
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-- |
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Thomas Kahle |
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http://dev.gentoo.org/~tomka/ |