(executable
 (name t_tls)
 (modules t_tls)
 (libraries
  trace
  ; avoid using a recent dune with `enabled-if`, by just using `select` instead.
  ; the dummy case just echoes back the expected file.
  (select
   t_tls.ml
   from
   (trace.thread-local-storage -> t_tls.real.ml)
   (-> t_tls.quine.ml))))

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