ToT build error with ToT GCC on Aarch64

[Martin Sebor]

On 07/23/2018 11:26 AM, Florian Weimer wrote:
> On 07/23/2018 06:19 PM, Jeff Law wrote:
>> On 07/23/2018 09:51 AM, Steve Ellcey wrote:
>>> I have run into a problem when building the ToT glibc with the ToT
>>> GCC on
>>> Aarch64.  I haven't dug into this enough to know if this is a GCC
>>> problem,
>>> a glibc problem, or just a message that needs to be ignored but I
>>> wanted to
>>> send out an email in case this is something that needs to be addressed
>>> before GCC 2.28 is released.
>
>> Martin S. and I are already looking at this and I've already asked
>> Martin to bring in Carlos and Florian.
>
> Would it be possible to print the full inlining stack for these GCC
> warnings?  I don't see a %K format specifier (or whatever is used for
> this).
>
> I think it would make it a bit easier to track these down.

It's one of my own pet peeves with the -Warray-bounds warnings
that they don't do that.  I've quickly hacked GCC to print
the inlining stack.  It doesn't look to me like it helps that
much but I'll let you be the judge:

In file included from fnmatch.c:244:
In function ‘findidxwc’,
     inlined from ‘internal_fnwmatch’ at fnmatch_loop.c:404:10:
../locale/weightwc.h:124:28: warning: array subscript 1 is outside array 
bounds of ‘wint_t[1]’ {aka ‘unsigned int[1]’} [-Warray-bounds]

Martin