var Gbytes = C.GoBytes(unsafe.Pointer(C.greeting), C.int(len(Greeting)))
var Greeting = C.GoString(C.greeting)
var Stderr = (*File)(C.getStderr())
var Stdout = (*File)(C.getStdout())
type File C.FILE
func (f *File) Flush()
func (f *File) WriteString(s string)