RFR: 8232084: HotSpot build failed with GCC 9.2.1

[Kim Barrett]

> On Oct 11, 2019, at 6:18 PM, Kim Barrett <kim.barrett at oracle.com> wrote:
> Right now it seems to me that -Wstringop-truncation is seriously
> buggy, both in the false positive and false negative directions.  This
> seems to be true at least through 9.x for some recent x.  And all of
> the occurrences of this warning in our code that I've heard of have
> been false positives.  So I think this warning is not carrying its
> weight, and I'd be okay with globally disabling it for now, pending
> improvements in its implementation.

It was pointed out to me that there have been some actual bugs in our
code detected by this warning, so I’m withdrawing my support for turning
off the warning completely.