[jdk11u-dev] RFR: 8257679: Improved unix compatibility layer in Windows build (winenv)

Thu Jul 28 14:05:54 UTC 2022

The main conflict is the lack of the WSL backport ([8215445: Enable building for Windows in WSL](https://github.com/openjdk/jdk/commit/46eb26b692ac7f9431d5b479028ec87e56707557)) Something which doesn't apply particularly cleanly and isn't required to achieve the MSYS2 backport that I'm trying to reach. There are also several Solaris specific edge cases that needed to be rewritten.

This PR will finally allow me to backport [8287724: Fix various issues with msys2](https://github.com/openjdk/jdk17u-dev/commit/2e21c87fac8d60c3c7ed7b2d0afae9abfc110359) cleanly which should be the final piece in the puzzle to enabling MSYS2 builds.

@RealCLanger / @GoeLin I suggest that this is run through the full SAP nightlies before this is merged.

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Depends on: https://git.openjdk.org/jdk11u-dev/pull/1277

Commit messages:
 - Backport d29c78da19ba78214efe9e7856cde30fdd9ba8ab

Changes: https://git.openjdk.org/jdk11u-dev/pull/1278/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1278&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8257679
  Stats: 4192 lines in 43 files changed: 2006 ins; 1829 del; 357 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1278.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1278/head:pull/1278

PR: https://git.openjdk.org/jdk11u-dev/pull/1278