bootloader_secure nrf log problem

[djqtsg]

HW: BMD-350

SDK: nRF5_SDK_12.0.0_12f24da

Sample Code: examples\dfu\bootloader_secure\pca10040_debug

sdk_config.h log setting:

#define NRF_LOG_ENABLED 1

#define NRF_LOG_BACKEND_SERIAL_USES_RTT 1

Problem: JLink RTT viewer shows no logging messages.

If I use UART to log by doing this

#define NRF_LOG_BACKEND_SERIAL_USES_UART 1

there are quite a few compiling errors because UART_ENABLED is not defined in sdk_config.h.

Question 1: what did I miss so that RTT did not work?

Question 2: for that UART logging, those compiling errors are bugs, aren't they?

[MartinBL]

1. Does the bootloader otherwise work fine? Expect the RTT?
2. You might need to do some changes to the flash settings and compiler flags.
3. What do the compiler errors say?