RFR: 8303485: Replacing os.name for operating system customization

[Alan Bateman]

On Fri, 10 Mar 2023 00:08:57 GMT, Justin King <jcking at openjdk.org> wrote:

> Has this totally killed of BSD support on the JDK side? I thought building non-macOS BSD was still viable, but perhaps not - certainly not after this change.

The macOS port in 7u4 was based on a BSD port and there was a time when it was possible to build. Right now, we have src/hotspot/os/bsd and native code in the libs that is compiled in with _ALLBSD_SOURCE.  It's sad to see the BSD port bit rot but if it's not maintained or tested in the OpenJDK project then the changes proposed here may be okay. For porters then know which code needs to be ported is important, ideally there would be a compile or build time if someone significant is missing.

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PR: https://git.openjdk.org/jdk/pull/12931