go/src/cmd/cgo/util.go

// run runs the command argv, feeding in stdin on standard input.
// It returns the output to standard output and standard error.
// ok indicates whether the command exited successfully.
func run(stdin []byte, argv []string) (stdout, stderr []byte, ok bool) { … }

func lineno(pos token.Pos) string { … }

// Die with an error message.
func fatalf(msg string, args ...interface{ … }

var nerrors …

func error_(pos token.Pos, msg string, args ...interface{ … }

func creat(name string) *os.File { … }