RFR: 8325163: Enable -Wpedantic on clang [v2]

[Kim Barrett]

On Mon, 5 Feb 2024 16:19:59 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

> Is there anything in this proposed PR that you gentlemen disagree with or object to? Or is this fine to push as a step in our ongoing pursuit of increasing the code quality, that can (and will) be followed by many more?

Yes.  As I said earlier:
"Without knowing what the actual warnings are that are being triggered and then
suppressed, I can't even begin to evaluate this change."

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PR Comment: https://git.openjdk.org/jdk/pull/17687#issuecomment-1928006901