8211804: Constant AO_UNUSED_MBZ uses left shift of negative value

[mrserb]

Hi all,

This pull request contains a backport of commit 51be7db9 from the openjdk/jdk repository.

The commit being backported was authored by Kim Barrett on 9 Oct 2018 and was reviewed by Alan Bateman.

This patch fixes a build error on macOS with Xcode 16.4 that can't be resolved using --disable-warnings-as-errors.

/jdk11u-dev/src/jdk.pack/share/native/common-unpack/constants.h:206:33: error: expression is not an integral constant expression
  206 |     AO_UNUSED_MBZ             = (-1)<<13, // options bits reserved for future use.
      |                                 ^~~~~~~~

Thanks!

---

Progress

• JDK-8211804 needs maintainer approval
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8211804: Constant AO_UNUSED_MBZ uses left shift of negative value (Bug - P4 - Requested)

Reviewing

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Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk11u-dev.git pull/3042/head:pull/3042
$ git checkout pull/3042

Update a local copy of the PR:
$ git checkout pull/3042
$ git pull https://git.openjdk.org/jdk11u-dev.git pull/3042/head

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https://git.openjdk.org/jdk11u-dev/pull/3042.diff

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[bridgekeeper]

👋 Welcome back serb! 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]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

This backport pull request has now been updated with issue and summary from the original commit.

[openjdk]

⚠️ @mrserb This change is now ready for you to apply for maintainer approval. This can be done directly in each associated issue or by using the /approval command.

[mrserb]

/approval request Clean backport. Fix for a broken build on macOS + XCode 16.4

[openjdk]

@mrserb
8211804: The approval request has been created successfully.

[mlbridge]

Webrevs

• 00: Full (fc00dffd)