case $THIS_SUB_DEPENDS in
  PDF) message "Cairo with PDF support requested, forcing poppler dependency" &&
       depends poppler "--enable-pdf";;
  XCB) message "Cairo with XCB support requested, forcing xcb-util dependency" &&
       depends xcb-util "--enable-xcb";;
   PS) message "Cairo with PS support requested, forcing ghostscript dependency" &&
       depends ghostscript "--enable-ps";;
  SVG) message "Cairo with SVG support requested, forcing libsvrg2 dependency" &&
       depends librsvg2 "--enable-svg";;
    X) message "Cairo with Xlib support requested, forcing libx11 dependency" &&
       depends libx11 "--enable-xlib";;
    *) message "${PROBLEM_COLOR}bogus sub_depends: $SPELL $THIS_SUB_DEPENDS${DEFAULT_COLOR}"
       return 1;;
esac
