8298225: [AIX] Disable PPC64LE continuations on AIX

[backwaterred]

This small change adds an import to the generated ad_ppc.cpp file to allow it to find Contiuations::enabled, and sets VMContinuations to false on AIX.

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Issue

• JDK-8298225: [AIX] Disable PPC64LE continuations on AIX

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[mlbridge]

Webrevs

• 02: Full - Incremental (5fb94181)
• 01: Full - Incremental (347a1091)
• 00: Full (347a1091)

[openjdk-notifier]

The parent pull request that this pull request depends on has now been integrated and the target branch of this pull request has been updated. This means that changes from the dependent pull request can start to show up as belonging to this pull request, which may be confusing for reviewers. To remedy this situation, simply merge the latest changes from the new target branch into this pull request by running commands similar to these in the local repository for your personal fork:

git checkout build/aix/continuation-enabled
git fetch https://git.openjdk.org/jdk master
git merge FETCH_HEAD
# if there are conflicts, follow the instructions given by git merge
git commit -m "Merge master"
git push

[TheRealMDoerr]

Mainline will get forked today. Please create a new PR in the JDK 20 stabilization
repository once it's available. This one get get closed afterwards.

[TheRealMDoerr]

This adds it for all platforms. Isn't it sufficient to add it in source %{ section of the ad file?

[backwaterred]

I tried that first, but may have done so incorrectly. I am trying again.

[TheRealMDoerr]

https://github.com/openjdk/jdk20 is now open for P3 bug fixes. (They will get merged into this repo after some time.)

[backwaterred]

https://github.com/openjdk/jdk20 is now open for P3 bug fixes. (They will get merged into this repo after some time.)

Thanks. I am closing this PR, and will re-open one on jdk20 after learning if the ppc.ad modification is feasible. The build is looking good so far, so I suspect it was my error that kept it from working the first time.