RFR: 8327049: Stop exporting debug.cpp functions on gcc

[Magnus Ihse Bursie]

On Thu, 29 Feb 2024 12:50:33 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

> This is a partial backout of [JDK-8326509](https://bugs.openjdk.org/browse/JDK-8326509). It turned out that starting to export the functions from debug.cpp could have unintended consequences in certain circumstances, so revert back to the original situation where these functions were only exported on Windows.

I guess that is mostly a matter of style, but sure, it is a bit shorter. And coming from you, I assume it is more relevant wrt a non-Microsoft-toolchain Windows port.

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PR Comment: https://git.openjdk.org/jdk/pull/18062#issuecomment-1971193501