depends -sub CXX gcc && depends boost && depends gtkmm2 && depends libgnomecanvasmm && if [[ $FLOWCANVAS_VCS == y ]] then depends libtool && depends automake && depends autoconf fi && optional_depends graphviz \ "--enable-graphviz" \ "--disable-graphviz" \ "for auto-layout support" && optional_depends doxygen \ "--enable-documentation" \ "--disable-documentation" \ "to build API documentation"