RFR: 8341586: RISC-V: build fail with gcc9

[SendaoYan]

On Mon, 7 Oct 2024 08:13:13 GMT, Ludovic Henry <luhenry at openjdk.org> wrote:

> In which cases do we care for GCC 9 for RISC-V? Given how fast the development of the RISC-V platform and spec is, such an old version of GCC will not have good support for RISC-V. Not completely opposed to the change, but I just think we would want to motivate such support.

This issue influence jdk11/17/21, so I think it's better to fix this issue in mainline first.

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PR Comment: https://git.openjdk.org/jdk/pull/21376#issuecomment-2396235788