let use_jocaml () =
ocamlc := A "jocamlc";
ocamlopt := A "jocamlopt";
ocamldep := A "jocamldep";
ocamlyacc := A "jocamlyacc";
ocamllex := A "jocamllex";
ocamlmklib := A "jocamlmklib";
ocamlmktop := A "jocamlmktop";
ocamlrun := A "jocamlrun";