nrf9160 mcuboot link failure searching for z_impl_k_sleep.. is CONFIG_MULTITHREADING required?

RE: nrf9160 mcuboot link failure searching for z_impl_k_sleep.. is CONFIG_MULTITHREADING required?

Mariano — Tue, 17 Sep 2024 21:34:11 GMT

Hi everyone,

I'm encountering an issue with MCUboot on NCS 2.7.0 and my custom board based on the nRF52840. The bootloader was functioning correctly with NCS 2.4.0, but now I'm unable to build due to the following error:

```
phyr-eabi/bin/ld.bfd.exe: modules/nrf/drivers/mpsl/flash_sync/lib..__nrf__drivers__mpsl__flash_sync.a(flash_sync_mpsl.c.obj): in function `k_sem_reset': F:/ncs/htrace-firmwares/firmware-bt840/CB2/mcuboot/zephyr/include/generated/syscalls/kernel.h:1137: undefined reference to `z_impl_k_sem_reset'
```

I've created a `mcuboot.conf` file and tried adding `CONFIG_LOG_MODE_MINIMAL=y`, but the error persists.

When I add `CONFIG_MULTITHREADING=y`, I can successfully build, but then I run out of flash space.

Has anyone encountered this issue or can offer any suggestions? Your help would be greatly appreciated.

RE: nrf9160 mcuboot link failure searching for z_impl_k_sleep.. is CONFIG_MULTITHREADING required?

Anthony Ambuehl — Mon, 03 Jul 2023 18:53:39 GMT

yes mcuboot is able compile with CONFIG_LOG_MODE_MINIMAL=y without setting CONFIG_MULTITHREADING

RE: nrf9160 mcuboot link failure searching for z_impl_k_sleep.. is CONFIG_MULTITHREADING required?

dejans — Mon, 03 Jul 2023 17:02:38 GMT

Hi,

Is it then in you case that when you set CONFIG_LOG_MODE_MINIMAL=y, everything works as expected?

Best regards,
Dejan

RE: nrf9160 mcuboot link failure searching for z_impl_k_sleep.. is CONFIG_MULTITHREADING required?

Anthony Ambuehl — Fri, 30 Jun 2023 22:02:26 GMT

It appears this problem is due to not setting CONFIG_LOG_MODE_MINIMAL=y. For nr5340 the CONFIG_LOG_MODE_MINIMAL is always y, but for nrf9160 its necessary to explicitly set it to y.

With CONFIG_LOG_MODE_MINIMAL=n (or not set) then CONFIG_MULTITHREADING is required to support the logging thread.