Re: [gentoo-dev] Re: fat binaries

[Jeremy Olexa]

On 11/14/2010 05:41 PM, Thomas Kahle wrote:
> On 00:30 Mon 15 Nov     , Diego Elio Pettenò wrote:
>> Il giorno dom, 14/11/2010 alle 22.03 +0100, Thomas Kahle ha scritto:
>>> I have a package (sci-libs/mpir) whose configure supports building of
>>> fat binaries with both x86 and amd64 assembler in the binary.
>>
>> Oh the heck are they implemented? If they are FatELF, no they shouldn't
>> be used, ever, full stop.
>
> They don't tell.  From the manual:
>
> Fat binary, ‘--enable-fat’
>
> Using ‘--enable-fat’ selects a “fat binary” build on x86 or x86 64
> systems, where optimized low level subroutines are chosen at runtime
> according to the CPU de- tected. This means more code, but gives
> reasonable performance from a single bi- nary for all x86 chips, or
> similarly for all x86 64 chips. (This option might become available for
> more architectures in the future.)

This is useless for Gentoo Users, IMO. Besides, the people that *want* 
this (anyone?) can use 'EXTRA_ECONF="--enable-fat" emerge sci-libs/mpir'

-Jeremy