8296153: Bump minimum boot jdk to JDK 20

[vidmik]

With the JDK 20 GA out it's time to bump the minimum boot JDK version for mainline/JDK 21.

Testing: tier1-5, GHA (the Windows build successfully downloads the JDK but then fails for unrelated reasons, and one seemingly unrelated Vector API test failure in tier 3)

---

Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8296153: Bump minimum boot jdk to JDK 20

Reviewers

• Erik Joelsson (@erikj79 - Reviewer)
• Joe Darcy (@jddarcy - Reviewer)
• Iris Clark (@irisclark - Reviewer)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk.git pull/13565/head:pull/13565
$ git checkout pull/13565

Update a local copy of the PR:
$ git checkout pull/13565
$ git pull https://git.openjdk.org/jdk.git pull/13565/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 13565

View PR using the GUI difftool:
$ git pr show -t 13565

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk/pull/13565.diff

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[bridgekeeper]

👋 Welcome back mikael! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

@vidmik The following label will be automatically applied to this pull request:

• build

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[mlbridge]

Webrevs

• 00: Full (20457e73)

[openjdk]

@vidmik This change now passes all automated pre-integration checks.

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

After integration, the commit message for the final commit will be:

8296153: Bump minimum boot jdk to JDK 20

Reviewed-by: erikj, darcy, iris

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

At the time when this comment was updated there had been 58 new commits pushed to the master branch:

• 117c5b1: 8279216: Investigate implementation of premultiplied alpha in the Little-CMS 2.13
• 723037a: 8298048: Combine CDS archive heap into a single block
• d518dbf: 8306440: Rename PSS:_num_optional_regions to _max_num_optional_regions
• 9cd5741: 8306436: Rename PSS*:_n_workers to PSS*:_num_workers
• 6e77e14: 8306456: Don't leak _worklist's memory in PhaseLive::compute
• be6031b: 8303703: Add support of execution tests using virtual thread factory jtreg plugin
• 5a00617: 8306543: GHA: MSVC installation is failing
• 3da987a: 8306075: Micro-optimize Enum.hashCode
• fdaabd6: 8306581: JVMCI tests failed when run with -XX:TypeProfileLevel=222 after JDK-8303431
• 36ec05d: 8306430: Open source some AWT tests related to TextComponent and Toolkit
• ... and 48 more: https://git.openjdk.org/jdk/compare/1b5d35ad2c8f0f3a43caba9d7a6d8e74f66caf5f...master

As there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid this automatic rebasing, please check the documentation for the /integrate command for further details.

➡️ To integrate this PR with the above commit message to the master branch, type /integrate in a new comment.

[vidmik]

Thank you for the reviews!

/integrate

[openjdk]

Going to push as commit cb158ff.
Since your change was applied there have been 58 commits pushed to the master branch:

• 117c5b1: 8279216: Investigate implementation of premultiplied alpha in the Little-CMS 2.13
• 723037a: 8298048: Combine CDS archive heap into a single block
• d518dbf: 8306440: Rename PSS:_num_optional_regions to _max_num_optional_regions
• 9cd5741: 8306436: Rename PSS*:_n_workers to PSS*:_num_workers
• 6e77e14: 8306456: Don't leak _worklist's memory in PhaseLive::compute
• be6031b: 8303703: Add support of execution tests using virtual thread factory jtreg plugin
• 5a00617: 8306543: GHA: MSVC installation is failing
• 3da987a: 8306075: Micro-optimize Enum.hashCode
• fdaabd6: 8306581: JVMCI tests failed when run with -XX:TypeProfileLevel=222 after JDK-8303431
• 36ec05d: 8306430: Open source some AWT tests related to TextComponent and Toolkit
• ... and 48 more: https://git.openjdk.org/jdk/compare/1b5d35ad2c8f0f3a43caba9d7a6d8e74f66caf5f...master

Your commit was automatically rebased without conflicts.

[openjdk]

@vidmik Pushed as commit cb158ff.

💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.