request: add windows/arm64 build for Windows on ARM

[rubin55]

Include required information

Really like its sister issue #7128, add windows/arm64 support and provide a download for Syncthing on Windows on ARM.

Go is very close to official build support and there's an official build that's also being used for Wireguard, see:

golang/go#36439
https://github.com/thongtech/go-windows-arm

[calmh]

Yep. If and when this lands in Go we'll do builds, automatically even. Currently this isn't an actionable issue so I'm closing, but rest assured there will be builds when the compiler builds them.

[rubin55]

Just a note for when you guys get to this. You will run into two issues:

1. go-ole: Compiling for Windows Arm has errors go-ole/go-ole#202
2. goversioninfo: cmd/compile: unknown ARM relocation type 7 golang/go#38020

I was able to fix 1. by simply creating the variant and variant-date files for arm with the correct build-directive. I was not able to fix the error I got with goversioninfo (unknown ARM relocation type 7). It should be something obvious though. The golang issue does not provide a fix (it's about someone building on Linux on ARM, where goversioninfo seems to be invoked unintendedly).

Building without goversioninfo gives a working syncthing.exe. I just tested this within my own environment (I built tag v1.14.0) and it works great so far (maybe good to know).

[rasa]

go-ole/go-ole#223 has been merged. Once shirou/gopsutil#1132 is merged, we should be able to target windows/arm and windows/arm64.

[calmh]

Builds with the OLE update:

https://build.syncthing.net/buildConfiguration/Syncthing_BuildWindows/110898?buildTab=artifacts&guest=1

Didn't look at what breakage the gopsutil stuff is.