RFR: 8344148: Add an explicit compiler phase for warning generation

[Archie Cobbs]

On Thu, 14 Nov 2024 22:16:23 GMT, Maurizio Cimadamore <mcimadamore at openjdk.org> wrote:

> Ah, ok, you also use `make` which builds the whole thing. That's good then - thanks!

Right - I was just trying to exclude the step that compiles using the bootstrap compiler, since that's not part of what we want to test.

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PR Comment: https://git.openjdk.org/jdk/pull/22088#issuecomment-2477534212