(* EXPERIMENT Lemma semax_func_skip: forall V (G: funspecs) {C: compspecs} fs idf (G': funspecs), semax_func V G fs G' -> semax_func V G (idf::fs) G'. *)

Lemma semax_external_FF:
forall Espec ids ef A n,
@semax_external Espec ids ef A (fun _ _ _ => FF) (fun _ _ _ => FF) n.