RFR: 8353066: Properly detect Windows/aarch64 as build platform

Thu Apr 3 09:03:55 UTC 2025

On Wed, 2 Apr 2025 23:25:28 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

> Configure does not properly detect Windows/aarch64 on Cygwin. One complicating factor here is that no native aarch64 version of Cygwin exists, so it is running x64 binaries in emulated mode.

As a side note, I noticed that just installing the Visual Studio BuildTools was not enough to get the native aarch64 version of the toolchain. :-( For that you needed to install the whole Visual Studio, including the IDE. I have no idea why, but it is annoying. Unless Microsoft fixes that quickly, that it perhaps yet another thing we should document. (I believe the current documentation claims that the BuildTools installation is all that is needed.)

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PR Comment: https://git.openjdk.org/jdk/pull/24397#issuecomment-2774965651