[RFC] remove pre gcc-4.0 optimizations

[Andreas Jaeger]

On 12/28/2012 06:14 PM, Mike Frysinger wrote:
> On Friday 28 December 2012 07:45:21 Andreas Jaeger wrote:
>> On 12/28/2012 10:39 AM, Ondřej Bílka wrote:
>>> Hello, I noticed that headers contain optimized versions for gcc as old
>>> as 2.8 or before.
>>>
>>> To simplify code I would remove anything older than 4.0.0 (April 20.2005)
>>> as it is not relevant today.
>>>
>>> Is there a minimal gcc requirement to remove more definitions?
>>
>> The installed headers should support older GCC versions. I think we
>> discussed this in the past (this year) but don't remember the
>> resolution, please search the archives,
>
> hmm, how old ? :)

I can't find anymore this discussion, so perhaps my memory was wrong.

Currently we have tests in glibc even for GCC 2.7.

> since the switch to nptl, the installed pthread.h doesn't work with <gcc-3.
> maybe few people care though (i have seen multiple reports through Gentoo).
>
> do you have an idea of what the thread was about that mentioned this earlier ?
> i didn't find any mention of the topic in the wiki or the manual.  seems like
> we should list it in the wiki FAQ at least.

I suggest we start a discussion on libc-alpha on the minimal compiler 
requirements for building applications.

Andreas
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