Re: [PATCH] Add avx2 fake-capability, like tls

["H.J. Lu" <hjl dot tools at gmail dot com>]

On Fri, Mar 17, 2017 at 12:18 PM, Rodriguez Bahena, Victor
<victor.rodriguez.bahena@intel.com> wrote:
>
> On 3/16/17, 9:39 PM, "Mike Frysinger" <vapier@gentoo.org> wrote:
>
>>On 03 Jan 2017 19:53, Victor Rodriguez wrote:
>>> The idea of the patch is to provide AVX2 capability to glibc, original
>>> patch from: Dimitri John Ledkov <dimitri.j.ledkov@intel.com>.
>>> It has been proved that the use of AVX2 improves the performance of
>>>current
>>> numerical applications. With this patch the Linux distributions will be
>>>able to
>>> handle AVX2 in glibc
>>
>>i don't think this description is accurate/relevant.  looks like you're
>>trying to add a new search path to ldconfig/ld.so.cache so that people
>>can build libs w/-mavx2 turned on and then put them under a path e.g.
>>/lib64/avx2/ ?
>>
>>you can't add arch-specific functionality to common code like this.
>>this patch will break all non-x86 arches.
>>
>>i think you want to actually be updating these files:
>>       sysdeps/i386/dl-procinfo.[ch]
>>       sysdeps/x86_64/dl-procinfo.[ch]
>>-mike
>
> Thanks for the feedback , working on V2
>
>>

Please take a look at hjl/hwcap/master branch at:

https://sourceware.org/git/?p=glibc.git;a=summary

It sets dl_hwcap from CPU features.

-- 
H.J.