if archive != "" {
		ofile = archive
	} else {
		out := "_go_.o"
		ofile = objdir + out
	}

	pkgpath := pkgPath(a)
	defaultGcFlags := []string{"-p", pkgpath}
	if p.Module != nil {
		v := p.Module.GoVersion
		if v == "" {
			v = gover.DefaultGoModVersion
		}
		if allowedVersion(v) {
			defaultGcFlags = append(defaultGcFlags, "-lang=go"+gover.Lang(v))
		}
	}
	if p.Standard {

	"cmd/internal/cov/covcmd",
	"internal/bisect",
	"internal/buildcfg",
	"internal/goarch",
	"internal/godebugs",
	"internal/goexperiment",
	"internal/goroot",
	"internal/gover",
	"internal/goversion",
	// internal/lazyregexp is provided by Go 1.17, which permits it to
	// be imported by other packages in this list, but is not provided
	// by the Go 1.17 version of gccgo. It's on this list only to

		"TESTGONETWORK=panic", // cleared by the [net] condition
		"GOSUMDB=" + testSumDBVerifierKey,
		"GONOPROXY=",
		"GONOSUMDB=",
		"GOVCS=*:all",
		"devnull=" + os.DevNull,
		"goversion=" + gover.Local(),
		"CMDGO_TEST_RUN_MAIN=true",
		"HGRCPATH=",
		"GOTOOLCHAIN=auto",
		"newline=\n",
	}

	if testenv.Builder() != "" || os.Getenv("GIT_TRACE_CURL") == "1" {

	// determine key/value types
	var key, val Type
	if x.mode != invalid {
		// Ranging over a type parameter is permitted if it has a core type.
		k, v, cause, isFunc, ok := rangeKeyVal(x.typ, func(v goVersion) bool {
			return check.allowVersion(x.expr, v)
		})
		switch {
		case !ok && cause != "":
			check.softErrorf(&x, InvalidRangeExpr, "cannot range over %s: %s", &x, cause)
		case !ok:

	TESTGO_GOROOT=<GOROOT used to build cmd/go, for use in tests that may change GOROOT>
	HOME=/no-home
	PATH=<actual PATH>
	TMPDIR=$WORK/tmp
	GODEBUG=<actual GODEBUG>
	devnull=<value of os.DevNull>
	goversion=<current Go version; for example, 1.12>

On Plan 9, the variables $path and $home are set instead of $PATH and $HOME.
On Windows, the variables $USERPROFILE and $TMP are set instead of
$HOME and $TMPDIR.

		opt(&conf)
	}

	// apply flag setting (overrides custom configuration)
	var goexperiment, gotypesalias string
	flags := flag.NewFlagSet("", flag.PanicOnError)
	flags.StringVar(&conf.GoVersion, "lang", "", "")
	flags.StringVar(&goexperiment, "goexperiment", "", "")
	flags.BoolVar(&conf.FakeImportC, "fakeImportC", false, "")
	flags.StringVar(&gotypesalias, "gotypesalias", "", "")

func Read(r io.ReaderAt) (*BuildInfo, error) {
	vers, mod, err := readRawBuildInfo(r)
	if err != nil {
		return nil, err
	}
	bi, err := debug.ParseBuildInfo(mod)
	if err != nil {
		return nil, err
	}
	bi.GoVersion = vers
	return bi, nil
}

type exe interface {
	// ReadData reads and returns up to size bytes starting at virtual address addr.
	ReadData(addr, size uint64) ([]byte, error)

		opt(&conf)
	}

	// apply flag setting (overrides custom configuration)
	var goexperiment, gotypesalias string
	flags := flag.NewFlagSet("", flag.PanicOnError)
	flags.StringVar(&conf.GoVersion, "lang", "", "")
	flags.StringVar(&goexperiment, "goexperiment", "", "")
	flags.BoolVar(&conf.FakeImportC, "fakeImportC", false, "")
	flags.StringVar(&gotypesalias, "gotypesalias", "", "")

	// There is a bit of a chicken-and-egg problem here: ideally we need to know
	// which Go version to switch to to download the requested modules, but if we
	// haven't downloaded the module's go.mod file yet the GoVersion field of its
	// info struct is not yet populated.
	//
	// We also need to be careful to only print the info for each module once
	// if the -json flag is set.
	//

	// determine key/value types
	var key, val Type
	if x.mode != invalid {
		// Ranging over a type parameter is permitted if it has a core type.
		k, v, cause, isFunc, ok := rangeKeyVal(x.typ, func(v goVersion) bool {
			return check.allowVersion(x.expr, v)
		})
		switch {
		case !ok && cause != "":
			check.softErrorf(&x, InvalidRangeExpr, "cannot range over %s: %s", &x, cause)
		case !ok: