[RFA/Patch] One more for libstdc++/28080

[Paolo Carlini]

Paolo Carlini wrote:

> Benjamin Kosnik wrote:
>
>>> then I would commit as a preparatory step the below, say tomorrow 
>>> evening, and then real soon will post the real patch for final 
>>> review. (Note that we are already including explicitely <pthread.h> 
>>> in many other tests, as should be always the case, in my opinion).
>>
>>
>> Scanning through the testsuite, I do see that pthread.h is included 
>> in a lot of other places directly. So, I'm in agreement.
>
> Thanks Benjamin for the positive feedback, I'm proceeding with my plans...

This is it. As I mentioned before, all the standard headers using one 
way or another basic algorithmic facilities (stl_algobase.h) and not 
including any I/O, become ~80-100 Kb smaller.

Tested gnu/generic locale models on x86_64-linux, without PCHs.

Paolo.

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