Re: [gentoo-dev] Replacing cpu-feature USE flags

[Ned Ludd]

On Thu, 2006-07-06 at 13:19 +0100, Ciaran McCreesh wrote:
> On Thu, 6 Jul 2006 12:52:29 +0200 "Diego 'Flameeyes' Pettenò"
> <flameeyes@g.o> wrote:
> | Right now we have mmx, 3dnow, 3dnowex, sse, sse2 and so on useflags
> | present in the tree, almost never used to get new dependencies, but
> | usually used to supply econf switches.
> |
> | This works as long as the user enable the flags, but for AMD64 the
> | story was, until now, that we simply enabled them when they worked,
> | because we had some minimum support available. Unfortunately this
> | became a problem with the introduction of nocona, because that is an
> | amd64-like system but with no 3dnow. And there is the problem that
> | sse3 is supported only in later versions of Athlon64 and so on.
>
> The other option here... Is to rename the x86 flags to x86_mmx,
> x86_3dnow etc, and use amd64_sse3 for amd64 flags, since they're not
> really the same as the x86 flags.
>


> There's probably some USE_EXPAND trickery that can be used here...
> CPU_FEATURE_X86="mmx sse" -> cpu_feature_x86_mmx etc might be cleaner?

I tend to agree this might be a cleaner approach vs having to edit &
redit CFLAGS all over the place.


-- 
Ned Ludd <solar@g.o>
Gentoo Linux

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