RFR: 8377326: [PPC64] build without C1 and C2 broken [v2]

[Matthias Baesken]

On Thu, 5 Feb 2026 22:18:20 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

>> Trivial fixes to get the build working when `--with-jvm-features=-compiler1,-compiler2` is configured.
>> `c_calling_convention` is used by the native wrapper. Some integer variables which are only used for compilers need to be defined. `frame_size_in_words` is unused.
>
> Martin Doerr has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update Copyright header.

Marked as reviewed by mbaesken (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/29595#pullrequestreview-3762288305