optional_depends readline \
                 "" "--without-readline" \
                 "for readline support" &&

optional_depends vala \
                 "--with-vala" \
                 "--without-vala --without-gui" \
                 "for the Vala GUI" &&

if is_depends_enabled $SPELL vala; then
  depends gtk+2 "--with-gui" &&
  depends vte &&

  suggest_depends gtkdialog
fi &&

optional_depends gtk+2 \
                 "--with-gui" \
                 "--without-gui" \
                 "gtk frontend" &&

optional_depends libewf "" "" "for Expert Witness compression format" &&

optional_depends python "" "" "for python scripting support" &&
optional_depends lua51 "" "" "for Lua scripting support" &&
optional_depends perl "" "" "for perl scripting support" &&
optional_depends RUBY "" "" "for ruby scripting support"
