if $tdm_no_Xau; then
  AC_MSG_WARN([Cannot build TDM! Make sure that libXau.a is installed!])
fi
if $tdm_no_Xdmcp; then
  AC_MSG_WARN([Cannot build TDM! Make sure that libXdmcp.a and Xdmcp.h 
are installed or use --without-xdmcp to disable XDMCP support!])
fi