[PATCH v3] RISC-V: re-enable gcc + rust builds

[Asuna]

On 9/19/25 1:20 PM, Vivian Wang wrote:
> I think instead of testing libclang version, it would make more sense to
> feature test if bindgen the binary supports these flags, like what we
> already do with $(cc-option,...).
>
> Same for all the other version tests.

This is another direction worth trying, but unfortunately I probably 
won't have time to refactor this patch towards that direction until the 
end of the month. Sorry for that.