rt-thread/components/drivers/rtc/Kconfig

config RT_USING_RTC
    bool "Using RTC device drivers"
    default n

    if RT_USING_RTC
        config RT_USING_ALARM
            bool "Using RTC alarm"
            default n

        config RT_USING_SOFT_RTC
            bool "Using software simulation RTC device"
            default n
    endif