RFR: 8329257: AIX: Switch HOTSPOT_TOOLCHAIN_TYPE from xlc to gcc [v3]

[Kim Barrett]

On Wed, 17 Apr 2024 13:02:33 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

>> If there are just 3 files using alloca, I strongly prefer solution 3. I think solution 1 has already been rejected by Kim.
>> 
>> (Also, for the record, it was me, not Julian, who expressed dislike about the `-Dalloca'(size)'=__builtin_alloca'(size)'` change)
>
> https://man7.org/linux/man-pages/man3/alloca.3.html sounds like solution 2 is the cleanest one ("standards conformance"). It is also the version with minimal code and which will even work with future alloca usages :-)
> If solution 2 has any disadvantage, I'd prefer solution 3.

I'm aware of this discussion and looking into the issues, but a personal matter has intervened and it will take
me a while to respond properly.  Maybe next week.

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PR Review Comment: https://git.openjdk.org/jdk/pull/18536#discussion_r1569012102