case "$THIS_SUB_DEPENDS" in
     EXTRAS) message "${PROBLEM_COLOR}EXTRAS is obsolete, please fix the spell using it${DEFAULT_COLOR}" ;;
      GUDEV) depends glib2 '--enable-gudev' ;;
        ACL) depends acl '--enable-udev_acl' ;;
       HWDB) list_remove UDEV_HWDB '--disable-hwdb'
             list_add UDEV_HWDB '--enable-hwdb' ;;
          *) message "${PROBLEM_COLOR}bogus sub_depends: $SPELL $THIS_SUB_DEPENDS${DEFAULT_COLOR}" &&
             return 1;;
esac

.