goarm64.txt

sudo apt-get install gcc gcc-aarch64-linux-gnu
git clone https://github.com/4ad/go.git go.arm64
cd go.arm64/src
GOARCH=arm64 ./all.bash # errors on runtime.GOMAXPROCS is not found
GOROOT=~/go.arm64 GOPATH=~/gopath PATH=~/go.arm64/bin:$PATH GOARCH=arm64 go tool

# not working yet

cd $GOPATH/src
cat <<'EOF' > main.go
package main
import "fmt"
func main() {
  fmt.Println("hello arm64")
}
EOF
GOROOT=~/go.arm64 GOPATH=~/gopath PATH=~/go.arm64/bin:$PATH GOARCH=arm64 go build -o main
file main