(library
 (name        foo)
 (public_name foo)
 (modules     foo))

(library
 (name        bar)
 (public_name bar)
 (libraries   foo)
 (modules     bar))

(rule
 (with-stdout-to foo.ml
  (echo "let x = 42")))

(rule
 (with-stdout-to bar.ml
  (echo "let x = string_of_int Foo.x")))

(rule
 (with-stdout-to test.ml
  (echo "let () = Printf.printf \"%d %s\" Foo.x Bar.x")))

(rule
 (deps    test.ml (package bar))
 (targets test.exe)
 (action  (run ocamlfind ocamlc -linkpkg -package bar -o test.exe test.ml)))

(alias
 (name   runtest)
 (action (run ./test.exe)))