RFR: 8349847: Support configuring individual lint categories as errors [v13]

Archie Cobbs acobbs at openjdk.org
Sun Sep 28 18:53:35 UTC 2025


> This PR enhances the `-Werror` flag to support lint categories just like `-Xlint` does. For example `-Werror:all,-preview` would cause an error if any warning not in the `preview` lint category occurred.
> 
> The existing `-Xlint` flag has a particular behavior when conflicting flags are combined (e.g., `-Xlint:all -Xlint:none -Xlint:foo -Xlint:-foo` is equivalent to `-Xlint:all`). This behavior has been factored out and Javadocumented so that both `-Xlint` and `-Werror` can have this same "parsing" logic.
> 
> See the CSR [JDK-8350044](https://bugs.openjdk.org/browse/JDK-8350044) for details on how the new flag behaves in certain corner cases.

Archie Cobbs has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 21 commits:

 - Merge branch 'master' into JDK-8349847 to fix conflicts.
 - Reword the "--help-lint" trailing blurb to make it sound more friendly.
 - Add trailing "--help-lint" blurb to clarify how category aliases are handled.
 - Merge branch 'master' into JDK-8349847 to fix conflicts.
 - Improve documentation per CSR review comments.
 - Address review comments.
 - Merge branch 'master' into JDK-8349847
 - Merge branch 'master' into JDK-8349847 to fix cross-compiling build problem.
 - Merge branch 'master' into JDK-8349847 to fix conflicts.
 - Merge branch 'master' into JDK-8349847 to fix conflicts.
 - ... and 11 more: https://git.openjdk.org/jdk/compare/9093d3a0...0599ab08

-------------

Changes: https://git.openjdk.org/jdk/pull/23622/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23622&range=12
  Stats: 241 lines in 13 files changed: 180 ins; 27 del; 34 mod
  Patch: https://git.openjdk.org/jdk/pull/23622.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23622/head:pull/23622

PR: https://git.openjdk.org/jdk/pull/23622


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