Ocamlbuild_pack.Log
val level : int ref
val dprintf : int -> ('a, Format.formatter, unit) format -> 'a
val eprintf : ('a, Format.formatter, unit) format -> 'a
val raw_dprintf : int -> ('a, Format.formatter, unit) format -> 'a
val classic_display : bool ref
val event : ?pretend:bool -> string -> string -> Tags.t -> unit
val display : (out_channel -> unit) -> unit