When RTC is enabled, a warning appear during compiling:
warning: implicit declaration of function 'rtc_alarm_enable' [-Wimplicit-function-declaration]
366 | rtc_alarm_enable(alarm->enable);
| ^~~~~~~~~~~~~~~~
It's due to _rtc_set_alarm is not covered by RT_USING_ALARM. It's wrong.
Solution: cover all functions including _rtc_get_alarm & _rtc_set_alarm
under RT_USING_ALARM macro conditional defintion.
Signed-off-by: Chen Wang <unicorn_wang@outlook.com>
16475b3c92