`val pdf : bool Stdlib.ref`
`val latex_file : string option Stdlib.ref`
`val set_latex_file : string -> unit`
`val xpdf : bool Stdlib.ref`
`val interactive : bool Stdlib.ref`
`val eps : bool Stdlib.ref`
`val verbose : bool Stdlib.ref`
`val cairo : bool Stdlib.ref`
`val t1disasm : string option Stdlib.ref`
`val depend : bool Stdlib.ref`
`val dumpable : bool Stdlib.ref`
`val dont_clean : bool Stdlib.ref`
`val mp : bool Stdlib.ref`
`val mps : bool Stdlib.ref`
`val pgf : bool Stdlib.ref`
`val png : bool Stdlib.ref`
`val svg : bool Stdlib.ref`
`val filename_prefix : string Stdlib.ref`
`val required_files : string list Stdlib.ref`
`val push_required : string -> unit`
`val spec : (string * Stdlib.Arg.spec * string) list`