[libc][time] add LOG_W to give a warning when RTC device is not used
#include <sys/time.h>
#include <rtthread.h>
+#include <rtdbg.h>
#ifdef RT_USING_DEVICE
#include <rtdevice.h>
#endif
@@ -219,6 +220,7 @@ RT_WEAK time_t time(time_t *t)
if(time_now == (time_t)-1)
{
+ LOG_W("Cannot find a RTC device to provide time!");
errno = ENOSYS;
}
@@ -246,12 +248,13 @@ int stime(const time_t *t)
}
else
{
+ LOG_W("Cannot find a RTC device to provide time!");
errno = ENOSYS;
return -1;
}
return 0;
-
#else
+ LOG_W("Cannot find a RTC device to provide time!");
errno = ENOSYS;
return -1;
#endif /* RT_USING_RTC */
