depends zlib "--with-zlib=system" && depends g++ && depends boost && sub_depends boost THREAD && sub_depends boost FILESYSTEM && sub_depends boost DATE_TIME && sub_depends boost REGEX && sub_depends boost PROGRAM_OPTIONS && if list_find "$RB_LIBTORRENT_OPTS" "--enable-python-binding"; then sub_depends boost PYTHON fi && optional_depends openssl \ "--with-ssl" \ "--without-ssl" \ "for SSL support" && optional_depends geoip \ "--with-libgeoip" "" \ "enable linking against system libgeoip"