Definition Gprog : funspecs :=
ltac:(with_library prog [ fib_spec _fib_loop; fib_spec _fib_loop_save_var; fib_spec _fib_rec ]).

(* Specifications: *)
Lemma body_fib_loop: semax_body Vprog Gprog f_fib_loop (fib_spec _fib_loop).
Lemma body_fib_rec: semax_body Vprog Gprog f_fib_rec (fib_spec _fib_rec).
Lemma body_fib_loop_save_var: semax_body Vprog Gprog f_fib_loop_save_var (fib_spec _fib_loop_save_var).