anchor.diff:    (top :int)
     (bot :int))
   
  -(define-exported-cfuns ("nl nonl")
  +(define-exported-cfuns ("nl" "nonl")
       :int)
   
   
  
positive.code:     :string
    (labnum :int))
  
  (define-exported-cfuns ("slk_atttron" "slk_attroff" "slt_attrset")
      :int
    (attrs chtype))
  
  
negative.code:   (y :int)
    (x :int))
  
  (define-exported-cfuns ("clearok" "idlok" "leaveok" "scrollok")
      :int
    (win window-ptr)
    (bf bool))
  