RFR: 8283929: GHA: Add RISC-V build config [v2]

Mon Sep 5 19:08:45 UTC 2022

On Mon, 5 Sep 2022 13:42:30 GMT, Ludovic Henry <luhenry at openjdk.org> wrote:

>> It adds CI for cross-compiling to linux-riscv64. It requires to use Ubuntu repositories for the debootstrap image because Debian doesn't have riscv64 packages on https://httpredir.debian.org/debian/. We can follow up on this change with switching to http://ports.ubuntu.com/ubuntu-ports for all cross-compiled architectures.
>> 
>> This change also does not require nor blocks switching to Ubuntu 22.04.
>> 
>> From talking with @shipilev, this replaces https://github.com/openjdk/jdk/pull/10086.
>
> Ludovic Henry has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains two commits:
> 
>  - Merge branch 'master' of https://github.com/openjdk/jdk into dev/ludovic/ci-cross-compile-riscv64
>  - Add cross-compilation to riscv64 on CI

Looks good.

(Also: what! Ubuntu has better platform support than Debian?!?)

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Marked as reviewed by ihse (Reviewer).

PR: https://git.openjdk.org/jdk/pull/10168