@item @code{-rtos} @var{rtos_type} -- enable rtos support for target,
@var{rtos_type} can be one of @option{auto}|@option{eCos}|@option{ThreadX}|
-@option{FreeRTOS}|@option{linux}.
+@option{FreeRTOS}|@option{linux}|@option{ChibiOS}.
@end itemize
@end deffn