(* TEST
 flags = " -w -a ";
 setup-ocamlc.byte-build-env;
 ocamlc.byte;
 check-ocamlc.byte-output;
*)

(* PR 4470: simplified from OMake's sources *)

module rec DirElt
  : sig
      type t = DirRoot | DirSub of DirHash.t
    end
  = struct
      type t = DirRoot | DirSub of DirHash.t
    end

and DirCompare
  : sig
      type t = DirElt.t
    end
  = struct
      type t = DirElt.t
    end

and DirHash
  : sig
      type t = DirElt.t list
    end
  = struct
      type t = DirCompare.t list
    end