help_vars.Add(BoolVariable('WITH_RA', 'Build with Remote Access module', False))
+help_vars.Add(EnumVariable('WITH_RD', 'Build including Resource Directory', '0', allowed_values=('0', '1')))
if target_os in targets_disallow_multitransport:
help_vars.Add(ListVariable('TARGET_TRANSPORT', 'Target transport', 'IP', ['BT', 'BLE', 'IP']))