`sig
val init : unit -> unit
val loadfile : string -> unit
val loadfile_private : string -> unit
val allow_only : string list -> unit
val prohibit : string list -> unit
val default_available_units : unit -> unit
val allow_unsafe_modules : bool -> unit
val add_interfaces : string list -> string list -> unit
val add_available_units : (string * Digest.t) list -> unit
val clear_available_units : unit -> unit
type linking_error =
Undefined_global of string
| Unavailable_primitive of string
| Uninitialized_global of string
type error =
Not_a_bytecode_file of string
| Inconsistent_import of string
| Unavailable_unit of string
| Unsafe_file
| Linking_error of string * Dynlink.linking_error
| Corrupted_interface of string
| File_not_found of string
| Cannot_open_dll of string
exception Error of Dynlink.error
val error_message : Dynlink.error -> string
val digest_interface : string -> string list -> Digest.t
end`