globalSkip = func(t *testing.T) { t.Skip("no go build") }
		return m.Run()
	}

	GOOS = goEnv("GOOS")
	GOARCH = goEnv("GOARCH")
	GOROOT = goEnv("GOROOT")

	if _, err := os.Stat(GOROOT); os.IsNotExist(err) {
		log.Fatalf("Unable able to find GOROOT at '%s'", GOROOT)
	}

	cc = []string{goEnv("CC")}

	out := goEnv("GOGCCFLAGS")
	quote := '\000'
	start := 0
	lastSpace := true
	backslash := false

	}
	if overcommit.value == 2 {
		t.Skip("vm.overcommit_memory=2")
	}
}

var env struct {
	sync.Once
	m   map[string]string
	err error
}

// goEnv returns the output of $(go env) as a map.
func goEnv(key string) (string, error) {
	env.Once.Do(func() {
		var out []byte
		out, env.err = exec.Command("go", "env", "-json").Output()
		if env.err != nil {
			return
		}

	os.Setenv("PWD", modRoot)
	if err := os.WriteFile("go.mod", []byte("module testcarchive\n"), 0666); err != nil {
		log.Panic(err)
	}

	GOOS = goEnv("GOOS")
	GOARCH = goEnv("GOARCH")
	bin = cmdToRun("./testp")

	ccOut := goEnv("CC")
	cc = []string{string(ccOut)}

	out := goEnv("GOGCCFLAGS")
	quote := '\000'
	start := 0
	lastSpace := true
	backslash := false
	s := string(out)
	for i, c := range s {

// and reports whether the effective value differs from the default.
func EnvFile() (string, bool, error) {
	if file := os.Getenv("GOENV"); file != "" {
		if file == "off" {
			return "", false, fmt.Errorf("GOENV=off")
		}
		return file, true, nil
	}
	dir, err := os.UserConfigDir()
	if err != nil {
		return "", false, err
	}
	if dir == "" {

	env := []cfg.EnvVar{
		{Name: "GO111MODULE", Value: cfg.Getenv("GO111MODULE")},
		{Name: "GOARCH", Value: cfg.Goarch, Changed: cfg.Goarch != runtime.GOARCH},
		{Name: "GOBIN", Value: cfg.GOBIN},
		{Name: "GOCACHE"},
		{Name: "GOENV", Value: envFile, Changed: envFileChanged},
		{Name: "GOEXE", Value: cfg.ExeSuffix},

		// List the raw value of GOEXPERIMENT, not the cleaned one.
		// The set of default experiments may change from one release

are recorded in a Go environment configuration file stored in the
per-user configuration directory, as reported by os.UserConfigDir.
The location of the configuration file can be changed by setting
the environment variable GOENV, and 'go env GOENV' prints the
effective location, but 'go env -w' cannot change the default location.
See 'go help env' for details.

General-purpose environment variables:

	GO111MODULE

# Target: environment and tools
#-----------------------------------------------------------------------------
.PHONY: show.env show.goenv

show.env: ; $(info $(H) environment variables...)
	$(Q) printenv

show.goenv: ; $(info $(H) go environment...)
	$(Q) $(GO) version
	$(Q) $(GO) env

# show makefile variables. Usage: make show.<variable-name>
show.%: ; $(info $* $(H) $($*))

	}
	if testing.Verbose() {
		fmt.Printf("+ export GOPATH=%s\n", gopath)
		fmt.Printf("+ cd %s\n", modRoot)
	}
	os.Setenv("GOPATH", gopath)
	// Explicitly override GOBIN as well, in case it was set through a GOENV file.
	os.Setenv("GOBIN", filepath.Join(gopath, "bin"))
	os.Chdir(modRoot)
	os.Setenv("PWD", modRoot)

	// The test also needs to install libraries into GOROOT/pkg, so copy the
	// subset of GOROOT that we need.