RFR: 8341880: RISC-V: riscv_vector.h native build fails with gcc13 after JDK-8320500

[SendaoYan]

On Thu, 10 Oct 2024 09:01:22 GMT, Hamlin Li <mli at openjdk.org> wrote:

> What we can do is to test if rvv intrinsic is really supported as we expect, e.g. if "#include <riscv_vector.h>" is right, if it's true then we can still add `-march=rv64gcv` flag, otherwise do not add the flag. Do you mind to construct such a patch? please kindly let me know. Otherwise I can fix the issue.

I can try to construct that patch. Is there any similar example that test if "#include <something>" works or not.

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PR Comment: https://git.openjdk.org/jdk/pull/21442#issuecomment-2404559839