Fix Windows ARM64 Detection

[hmelder]

CMAKE_SYSTEM_PROCESSOR returns ARM64 and not aarch64 (cmake version 3.27.9).

systeminfo:

OS Name:                   Microsoft Windows 11 Pro
OS Version:                10.0.22598 N/A Build 22598
OS Manufacturer:           Microsoft Corporation
OS Configuration:          Standalone Workstation
OS Build Type:             Multiprocessor Free
System Type:               ARM64-based PC

[compnerd]

Why not use MATCHES? I'm not sure how I didn't hit this though as I've been using Swift on Windows ARM64 for a while.

[hmelder]

I am running on a prerelease version from late 2022, maybe they changed the architecture name later on.

Why not use MATCHES?

I was just adapting the method used for x64 and AMD64 detection. Should I change it?

[hmelder]

@compnerd

[triplef]

Would there be a simple way to also support cross-compiling on Windows using the respective VS environments e.g. by looking at the VSCMD_ARG_TGT_ARCH env var instead of CMAKE_SYSTEM_PROCESSOR? Not sure what’s the common CMake thing to do on Windows, but personally I would expect it to build for whatever VS environment I am using.

[hmelder]

@compnerd Given the previous use of OR instead of MATCHES how should I move on with this?

[compnerd]

Eh, I suppose that it is fine as is.

[compnerd]

@swift-ci please test

[compnerd]

Hmm, actually, is this still needed after #812?

[hmelder]

Hmm, actually, is this still needed after #812?

Nope