LibPaths []string
}

// Ask the driver at the given path for information for this GccgoInstallation.
// The given arguments are passed directly to the call of the driver.
func (inst *GccgoInstallation) InitFromDriver(gccgoPath string, args ...string) (err error) {
	argv := append([]string{"-###", "-S", "-x", "go", "-"}, args...)
	cmd := exec.Command(gccgoPath, argv...)
	stderr, err := cmd.StderrPipe()
	if err != nil {
		return
	}

	case "gc":
		return &gcimports{
			fset:     fset,
			packages: make(map[string]*types.Package),
			lookup:   lookup,
		}

	case "gccgo":
		var inst gccgoimporter.GccgoInstallation
		if err := inst.InitFromDriver("gccgo"); err != nil {
			return nil
		}
		return &gccgoimports{
			packages: make(map[string]*types.Package),
			importer: inst.GetImporter(nil, nil),
			lookup:   lookup,
		}

	case "source":

	// This test relies on gccgo being around.
	gpath := gccgoPath()
	if gpath == "" {
		t.Skip("This test needs gccgo")
	}

	var inst GccgoInstallation
	err := inst.InitFromDriver(gpath)
	if err != nil {
		t.Fatal(err)
	}
	imp := inst.GetImporter(nil, nil)

	// Ensure we don't regress the number of packages we can parse. First import