;; A foreign function's address is not a Flan function value. A Flan
;; function's emitted signature ends with the environment and the transfer
;; channel and a C one does not, so nothing could call the resulting pointer
;; correctly — and the gap is wider since capture arrived, because a Flan
;; function value is two words and a C symbol is one — and an
;; aggregate crossing the boundary is flattened by a generated shim, which the
;; raw symbol knows nothing about. Refused for what it is, with the wrapper
;; named as the way to get one.
(declare c-abs [n i32] i32 "abs")

(defn use [f (Fn [i32] i32)] i32 (f 3))

(defn main [] i32
  (println (use c-abs))
  0)