@eliasnaur I've open an issue here. Since I don't know how to build up a darwin/arm64 platform on my Mac maybe you can give me some page/ tutorial about it.

Apparently the implementation in internal/cpu/cpu_arm64.go is Linux only. On darwin, arm64_hwcap is not linknamed from runtime/os_darwin_arm64.go, and it doesn't have the same hwcap anyway. So internal/cpu doesn't work on darwin/arm64.

It's some work to set up, so if you like, I can test any CL that you come up with.

If you like to attempt a darwin/arm64 setup, the steps are roughly:

• Install Xcode and make sure you can run a blank project on an iPhone attached to your Mac. Xcode will step you through the Apple Developer account setup if you don't already have one.
• Install Homebrew, libimobiledevice and ios-deploy:

# Only HEAD version of libimobiledevie
$ brew install -HEAD libimobiledevice
# Node is for npm
$ brew install node
$ npm install --unsafe-perm=true ios-deploy

• run go run $GOROOT/misc/ios/detect.go. It should output a suggestion(s) for the environment variables needed to codesign tests:

$ go run misc/ios/detect.go
Available provisioning profiles below.
NOTE: Any existing app on the device with the app id specified by GOIOS_APP_ID
will be overwritten when running Go programs.

export GOIOS_DEV_ID=...
export GOIOS_APP_ID=...
export GOIOS_TEAM_ID=...

• export the variables in your current shell and run tests. $GOROOT/bin has to be in your path for go to access the go_darwin_arm*_exec wrappers:

$ export $PATH=$GOROOT/bin:$PATH
$ cd $GOROOT/src
$ GOARCH=arm64 ./iostest.bash

Because of the way they're harnessed, running tests are quite slow on iOS. You may want to run only your test with GOARCH=arm64 go tool dist test go_test:internal/cpu

@eliasnaur I think I will add a CL that remove darwin/openbsd support right now to let them pass the test.

And add another CL to support darwin/netbsd etc.

Change https://golang.org/cl/105455 mentions this issue: internal/cpu: skip arm64 feature test for none linux