// i.e., all hashes.  This will print all the FMAs; this test is only interested in one of them (that should appear near the end).
	cmd.Env = append(cmd.Env, "GOCOMPILEDEBUG=fmahash=1/0", "GOOS=linux", "GOARCH=arm64", "HOME="+tmpdir)
	t.Logf("%v", cmd)
	t.Logf("%v", cmd.Env)
	b, e := cmd.CombinedOutput()
	if e != nil {
		t.Errorf("build failed: %v\n%s", e, b)
	}