Am I aarch64?

aarch64.go

package main

import (
	"fmt"
  "strings"

	"golang.org/x/sys/unix"
)

func getMachineArch() (string, error) {
	uname := unix.Utsname{}
	err := unix.Uname(&uname)
	fmt.Printf("getMachineArch() err = %+v\n", err)
	fmt.Printf("getMachineArch() sysname = %s\n", string(uname.Sysname[:]))
	fmt.Printf("getMachineArch() nodename = %s\n", string(uname.Nodename[:]))
	fmt.Printf("getMachineArch() release = %s\n", string(uname.Release[:]))
	fmt.Printf("getMachineArch() version = %s\n", string(uname.Version[:]))
	fmt.Printf("getMachineArch() machine = %s\n", string(uname.Machine[:]))
	if err != nil {
		return "", err
	}

	return string(uname.Machine[:]), nil
}

// aarch64 changes
func isAArch64() bool {
	arch, err := getMachineArch()
	fmt.Printf("isAArch64() arch = %s, err = %v\n", arch, err)
	if err == nil {
		return strings.Contains(arch, "aarch64")
	}
	return false
}

func main() {
	fmt.Printf("am I aarch64 => %t?\n", isAArch64())
}