[PATCH] Remove __warn_memset_zero_len [bz #25399]

[Florian Weimer]

* Jakub Jelinek:

> It is ok if it doesn't warn anymore, and it is ok if it is not in the
> headers anymore, but one can still have object files or *.a libraries
> compiled with gcc 4.9 and earlier against older glibc and that will
> now fail to link altogether.

In general, that is not supported.  We have recently made an exception
for __xstat.  But in this case, linking after removal will only fail if
there was an annoying linker warning before, so I think it's going to be
very rare that this makes a difference.

Thanks,
Florian
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