os.Setenv(testEnvName, test.env)

			fn, err := ToSymbolFunc(cmd, tmpdir)
			if err != nil {
				if !test.fail {
					t.Errorf("ToSymbolFunc(%q, %q): unexpected error %v", cmd, tmpdir, err)
				}
			} else if test.fail {
				t.Errorf("ToSymbolFunc(%q, %q) succeeded but expected to fail", cmd, tmpdir)
			} else if got, want := fn(input), test.mangled; got != want {
				t.Errorf("ToSymbolFunc(%q, %q)(%q) = %q, want %q", cmd, tmpdir, input, got, want)

// This package is not used for the gc compiler.
package pkgpath

import (
	"bytes"
	"errors"
	"fmt"
	"os"
	"os/exec"
	"strings"
)

// ToSymbolFunc returns a function that may be used to convert a
// package path into a string suitable for use as a symbol.
// cmd is the gccgo/GoLLVM compiler in use, and tmpdir is a temporary
// directory to pass to os.CreateTemp().

func (tools gccgoToolchain) gccgoCleanPkgpath(b *Builder, p *load.Package) string {
	gccgoToSymbolFuncOnce.Do(func() {
		tmpdir := b.WorkDir
		if cfg.BuildN {
			tmpdir = os.TempDir()
		}
		fn, err := pkgpath.ToSymbolFunc(tools.compiler(), tmpdir)
		if err != nil {
			fmt.Fprintf(os.Stderr, "cmd/go: %v\n", err)
			base.SetExitStatus(2)
			base.Exit()
		}
		gccgoToSymbolFunc = fn
	})

		cmd := os.Getenv("GCCGO")
		if cmd == "" {
			cmd, err = exec.LookPath("gccgo")
			if err != nil {
				fatalf("unable to locate gccgo: %v", err)
			}
		}
		gccgoMangler, err = pkgpath.ToSymbolFunc(cmd, *objDir)
		if err != nil {
			fatalf("%v", err)
		}
	}
	return gccgoMangler(ppath)
}

// Return the package prefix when using gccgo.
func (p *Package) gccgoSymbolPrefix() string {