tde_conditional_add_subdirectory( BUILD_KTTSD_COMMAND  command     )
tde_conditional_add_subdirectory( BUILD_KTTSD_EPOS     epos        )
tde_conditional_add_subdirectory( BUILD_KTTSD_FESTIVAL festivalint )
tde_conditional_add_subdirectory( BUILD_KTTSD_FREETTS  freetts     )
tde_conditional_add_subdirectory( BUILD_KTTSD_FLITE    flite       )
tde_conditional_add_subdirectory( BUILD_KTTSD_HADIFIX  hadifix     )