Add <limits.h> integer width macros

[Florian Weimer]

On 10/04/2016 05:51 PM, Joseph Myers wrote:
> On Tue, 4 Oct 2016, Florian Weimer wrote:
>
>> On 10/04/2016 05:07 PM, Paul Eggert wrote:
>>> On 09/16/2016 05:32 PM, Paul Eggert wrote:
>>>> the patch looks good; thanks.
>>>
>>> Unfortunately I did not check the patch thoroughly enough, as the patch
>>> turns out to define LONG_WIDTH incorrectly on i686 with
>>> gcc-6.2.1-2.fc26.i686, and this causes grep's 'make check' to fail
>>> (luckily these are side tests; grep itself works fine). See:
>>>
>>> https://bugzilla.redhat.com/show_bug.cgi?id=1381582
>>
>> See comment 5 there.  The problem seems to be that GCC <limits.h> is included
>> first, followed by glibc <limits.h>, which then tries to get the definitions
>> from GCC.  But at this point, nothing happens because the GCC include guards
>> cause the GCC header to be skipped.
>
> Presumably this is an area where include ordering with installed headers
> differs from include ordering when building the glibc testsuite.  Does
> this patch work in the installed header context to fix the reported issue?
> (I'm running tests of it in the normal glibc testsuite context.)

I applied the patch to the installed header and it fixes the reported 
issue about LONG_WIDTH.

Thanks,
Florian