This is the mail archive of the
libc-alpha@sourceware.org
mailing list for the glibc project.
Re: [PATCH] BZ #19590: Fixed build of shared objects that use libmvec.so functions
- From: Andrew Senkevich <andrew dot n dot senkevich at gmail dot com>
- To: "H.J. Lu" <hjl dot tools at gmail dot com>
- Cc: Joseph Myers <joseph at codesourcery dot com>, libc-alpha <libc-alpha at sourceware dot org>
- Date: Wed, 17 Feb 2016 17:37:17 +0300
- Subject: Re: [PATCH] BZ #19590: Fixed build of shared objects that use libmvec.so functions
- Authentication-results: sourceware.org; auth=none
- References: <CAMXFM3tML81iuKQMKRU-T4Fw0+=sYk0q_BNavMGagt21VcYvzQ at mail dot gmail dot com> <CAMe9rOp7BF2avdWbGTbsxuYQV_rmXSxzDUAwz+nHK-GhWqPKJA at mail dot gmail dot com> <CAMXFM3sG90jn3Em-REfaqtj3OGAjh51OcO=yn1qHqJ4aStkPrg at mail dot gmail dot com> <alpine dot DEB dot 2 dot 10 dot 1602111641250 dot 29940 at digraph dot polyomino dot org dot uk> <CAMXFM3uxH=0DHnwikPjs2AobQ0kxOqKg+j=CuOWX=RLB_i8hxg at mail dot gmail dot com> <CAMe9rOoWy+hqiCOKqFx0nOFVRT_kBETJ5hYE+cY6pFWUke=tkw at mail dot gmail dot com> <CAMXFM3vG1DNELfGaOOoUvRDGgrGWL4m3M8+5ngPg8RPnCLqUog at mail dot gmail dot com> <alpine dot DEB dot 2 dot 10 dot 1602161347240 dot 26462 at digraph dot polyomino dot org dot uk> <CAMXFM3tXQi0wRFNN1gyu-T3C7g_EWPxMfhK4wexADGtcPojNZg at mail dot gmail dot com> <CAMe9rOqP0=iC8g0SiUUQ0Yy3dC=6y6hrTMrzKPTEmGZVAsMZJw at mail dot gmail dot com>
2016-02-17 17:29 GMT+03:00 H.J. Lu <hjl.tools@gmail.com>:
> On Wed, Feb 17, 2016 at 6:14 AM, Andrew Senkevich
> <andrew.n.senkevich@gmail.com> wrote:
>> 2016-02-16 16:49 GMT+03:00 Joseph Myers <joseph@codesourcery.com>:
>>> On Tue, 16 Feb 2016, Andrew Senkevich wrote:
>>>
>>>> Here is patch with tests.
>>>
>>> This is the wrong approach for tests. Tests for this should not be
>>> testing implementation details about aliases, and so should not be
>>> creating any wrappers at all. They should be testing vectorizable calls
>>> to the scalar functions, compiled several times with different options
>>> into both executables and shared libraries.
>>
>> Please look at attached version.
>
> There may be 2 issues:
>
> 1. GCC 4.X may not support pragma simd.
> 2. GCC X may call those aliases.
>
> I think test-libmvec-alias-mod.c should be in assembly.
For 1. we use -Wno-unknown-pragmas in make rules.
> 2. GCC X may call those aliases.
Do you mean GCC X may don't call those aliases?
Yes, but then it will use not alias version and test will be also work.
--
WBR,
Andrew