RFR: 8315794: RISC-V: build fails with GCC 12.3

[Fei Yang]

On Wed, 6 Sep 2023 14:29:56 GMT, Antonios Printezis <tonyp at openjdk.org> wrote:

> The build failure happens when building on RISC-V with GCC 12.3. Is there a better way to address this than disabling the stringop-overflow warnings for the two files in question?

Hi, I once created a similar JBS issue and provided a workaround for this problem: https://bugs.openjdk.org/browse/JDK-8299580. As discussed on PR: https://github.com/openjdk/jdk/pull/11858, the mentioned HotSpot code looks fine and this looks like a GCC-12 suprious warning. And we intend to think that it should be a GCC bug. 

But I think it's better to disabling the stringop-overflow warnings for the affected files like you do in this PR.

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PR Comment: https://git.openjdk.org/jdk/pull/15593#issuecomment-1709338170