RFR: 8345627: [REDO] Use gcc12 -ftrivial-auto-var-init=pattern in debug builds [v2]

[Magnus Ihse Bursie]

On Fri, 28 Feb 2025 10:28:57 GMT, Kim Barrett <kbarrett at openjdk.org> wrote:

> Visual Studio provides a similar mechanism, InitAll.

Unfortunately, the option to enable this (`/initall`) is not officially documented, so I guess that implies that we should not use it. :-(

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PR Comment: https://git.openjdk.org/jdk/pull/22691#issuecomment-2697220527