[PATCH x86_64][BZ #20139] Don't allow configure with not supporting AVX512 assembler w/o --disable-avx512.

[Florian Weimer]

On 06/27/2016 08:15 PM, Andrew Senkevich wrote:
> 2016-06-27 21:03 GMT+03:00 Florian Weimer <fweimer@redhat.com>:
>> On 06/27/2016 07:40 PM, Andrew Senkevich wrote:
>>>
>>> To fix BZ #20139 we need don't let to configure with not supporting
>>> AVX512 assembler w/o --disable-avx512.
>>
>>
>> There is an existing configure check for HAVE_AVX512_ASM_SUPPORT.  Why isn't
>> it sufficient?
>
> Where are bug https://sourceware.org/bugzilla/show_bug.cgi?id=20139
> It is the case when HAVE_AVX512_ASM_SUPPORT is undefined and Glibc is
> built for AVX512 hardware.

It's still unclear to me what you are proposing as a remedy.

Building glibc with --disable-avx512 will still be broken, no?

Thanks,
Florian