; Marker library: only present on OCaml 5+, used as a proxy for Domain availability.

(library
 (name ocaml5)
 (modules ocaml5)
 (enabled_if
  (>= %{ocaml_version} 5)))

(executable
 (name t_domains)
 (modules t_domains)
 (libraries
  trace
  ; use the marker library to pick between the real test and the quine fallback.
  (select
   t_domains.ml
   from
   (ocaml5 threads -> t_domains.real.ml)
   (-> t_domains.quine.ml))))

(rule
 (alias runtest)
 (package trace)
 (action
  (progn
   (with-stdout-to
    t_domains.output
    (run %{exe:t_domains.exe} %{dep:t_domains.expected}))
   (diff t_domains.expected t_domains.output))))