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Re: [PATCH 3/3] sparc: M7 optimized memcpy/mempcpy/memmove/memset/bzero.



On 04/10/2017 17:41, Joseph Myers wrote:
> On Wed, 4 Oct 2017, Adhemerval Zanella wrote:
> 
>> On 04/10/2017 17:16, Joseph Myers wrote:
>>> On Wed, 4 Oct 2017, Adhemerval Zanella wrote:
>>>
>>>> It is possible to implement the ARM resolvers in C and built it with GCC
>>>> mainline with two adjustments along with default _ifunc macro:
>>>
>>> Do you not get the problems with errors about incompatible types for a 
>>> symbol and its aliases, in the absence of ifunc attribute support?
>>>
>>
>> With two adjustments from my previous message I can build with
>> GCC 8.0.0 20171004 (experimental) for armv7.  The issue is if we try
>> to do something as x86_64 does:
>>
>> __hidden_ver1 (__new_memcpy, __GI_memcpy, __redirect_memcpy)
>>   __attribute__ ((visibility ("hidden")));
>>
>> This indeed dump incompatible types with mainline GCC.
> 
> Well, we should first fix mainline GCC to allow ifunc attributes on ARM by 
> default.  Then only consider workarounds in glibc if still needed after 
> such a fix.
> 

Ok, I will try to check this out on gcc side as well.


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