Re: [RFC PATCH] configure check for ld's --no-relax flag

[Vladimir 'φ-coder/phcoder' Serbinenko]

On 04.08.2014 16:53, Andrey Borzenkov wrote:
> В Mon, 04 Aug 2014 10:45:22 +0400
> Stanislav Kholmanskikh <address@hidden> пишет:
> 
>> Hi!
>>
>> On 08/01/2014 07:40 PM, Vladimir 'φ-coder/phcoder' Serbinenko wrote:
>>> On 01.08.2014 17:35, Andrey Borzenkov wrote:
>>>> В Fri,  1 Aug 2014 16:15:56 +0400
>>>> Stanislav Kholmanskikh <address@hidden> пишет:
>>>>
>>>>> Early versions of binutils doesn't support --no-relax flag, so
>>>>> commit 063f2a04d158ec1b275a925dfbae74b124708cde prevents building
>>>>> with such versions.
>>>>>
>>>>> Signed-off-by: Stanislav Kholmanskikh <address@hidden>
>>>>> ---
>>>>>   conf/Makefile.common |    8 ++++++++
>>>>>   configure.ac         |   10 ++++++++++
>>>>>   2 files changed, 18 insertions(+), 0 deletions(-)
>>>>>
>>>>> diff --git a/conf/Makefile.common b/conf/Makefile.common
>>>>> index e4c301f..5bda66f 100644
>>>>> --- a/conf/Makefile.common
>>>>> +++ b/conf/Makefile.common
>>>>> @@ -8,11 +8,19 @@ unexport LC_ALL
>>>>>   # Platform specific options
>>>>>   if COND_sparc64_ieee1275
>>>>>     CFLAGS_PLATFORM += -mno-app-regs
>>>>> +if COND_LD_SUPPORTS_NO_RELAX
>>>>>     LDFLAGS_PLATFORM = -Wl,-melf64_sparc -Wl,--no-relax
>>>>> +else
>>>>> +  LDFLAGS_PLATFORM = -Wl,-melf64_sparc -mno-relax
>>>>> +endif
>>>>
>>>> TBO I think commit should simply be reverted. "Uniformity" is rather
>>>> poor excuse for breaking existing systems.
>>>>
>>> This commit is needed for clang to compile for sparc64. Given that
>>> sparc64 clang still doesn't really work I'm ok with reverting, at least
>>> for now.
>>
>> But, it this case, maybe it would be better to consider 
>> reviewing/applying this patch? Just to not return to this issue after 
>> some time?
>>
>> Andrey, Vladimir, what do you think?
>>
> 
> Yes, commit message was pretty confusing. This leaves the question,
> whether combination of clang and binutils that do not support
> -Wl,--no-relax exists though :) Otherwise I agree, we should use this
> patch.
> 
I think we could try to push for clang to have -mno-relax. They're
usually pretty responsive and we'll probably need few fixes for few
other clang problems anyway. For now I just reverted it. We'll see how
clang sparc64 goes.
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