RFR: 8353009: Document target selection flag for Windows AArch64 builds

[Magnus Ihse Bursie]

On Wed, 26 Mar 2025 22:38:40 GMT, Saint Wesonga <duke at openjdk.org> wrote:

> The target selection configuration flag for Windows AArch64 should be added to the build documentation for improved discoverability and completeness.

Wait a minute. I re-read the discussion a bit more carefully, and let my brain re-process what I said above...

Is the goal here to document how you properly do cross-compilation for windows/aarch64 on windows/x64? If so, I think this is a correct solution, but the documentation should be more clear that this applies for cross-compiling to windows/aarch64 from x64 on cygwin.

If the problem is that native builds on windows/aarch64 does not work, then it is a different issue that needs to be fixed.

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PR Comment: https://git.openjdk.org/jdk/pull/24267#issuecomment-2766081635