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On Thu, 6 Jul 2006 14:44:22 +0200 |
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"Diego 'Flameeyes' Pettenò" <flameeyes@g.o> wrote: |
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> On Thursday 06 July 2006 14:35, Kevin F. Quinn wrote: |
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> > This could easily be done by configure |
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> > scripts; perhaps it would be a good idea to look into writing some |
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> > autoconf macros. |
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> Actually there's little need, you can simply use the #ifdef in the |
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> code, unless you have separated source files for MMX, SSE and so on |
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> (that might as well be), but even then, it's really trivial to |
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> autoconf. |
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Yep; I've seen that several packages do it the #ifdef way, which is |
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ideal as we don't need to do set any configure stuff at all then (I |
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guess those packages don't have configure options/use flags to select |
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between mmx, sse etc anyway). |
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> The problem is that many autoconf scripts do it the other way around, |
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> by forcing -march or -mcpu (that is deprecated by -mtune too) deduced |
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> from /proc/cpuinfo. |
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Ooh; that's nasty. Let me guess - mplayer ... yeah; what a surprise. |
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Presumably we disable such trickery if we see it, as it makes the |
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target code depend on the build system which is obviously wrong - at |
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least for Gentoo. |
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-- |
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Kevin F. Quinn |
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