let overbose = if !verbose then " -classic-display " else ""
let clean_cmd = if !clean_first then "ocamlbuild -clean;" else ""
let build_cmd = if otarget = "" then "" else
let overbose = if !verbose then " -classic-display " else ""
let clean_cmd = if !clean_first then "ocamlbuild -clean;" else ""
let build_cmd = if otarget = "" then "" else