// MacOS prints
			// Darwin p1.local 21.1.0 Darwin Kernel Version 21.1.0: Wed Oct 13 17:33:01 PDT 2021; root:xnu-8019.41.5~1/RELEASE_ARM64_T6000 x86_64
			// on ARM64 laptops when there is an x86 parent in the
			// process tree. Look for the RELEASE_ARM64 to avoid being
			// confused into building an x86 toolchain.
			gohostarch = "arm64"
		case strings.Contains(out, "x86_64"), strings.Contains(out, "amd64"):
			gohostarch = "amd64"

// or else a command group that ran out of arguments
// or had an unknown subcommand (len(cmd.Commands) > 0).
// It returns that command and the number of elements of args
// that it took to arrive at that command.
func lookupCmd(args []string) (cmd *base.Command, used int) {
	cmd = base.Go
	for used < len(args) {
		c := cmd.Lookup(args[used])
		if c == nil {
			break
		}
		if c.Runnable() {

	deviceGopath := deviceGotmp + "/gopath"
	defer adb("exec-out", "rm", "-rf", deviceGotmp) // Clean up.

	// Determine the package by examining the current working
	// directory, which will look something like
	// "$GOROOT/src/mime/multipart" or "$GOPATH/src/golang.org/x/mobile".
	// We extract everything after the $GOROOT or $GOPATH to run on the
	// same relative directory on the target device.