I am porting an application from NCS v2.3.0 -> NCS v2.4.0. My application runs in nrf5340dk_nrf5340_cpuapp_ns with NSIB and mcuboot. The mcuboot uses external flash for the secondary partition. The application also includes a secure partition to implement custom security services
I have been able to get my code to compile clean and boot to the non-secure app for nrf5340dk_nrf5340_cpuapp.
Now I am also trying to implement the same features on the nrf9160dk_nrf9160_ns. I changed the --board option in the call to west and removed BLE focused overlays. I am getting a strange linking error that I don't understand:
:/aa/toolchains/31f4403e35/opt/zephyr-sdk/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/12.2.0/../../../../arm-zephyr-eabi/bin/ld.bfd.exe: app/libapp.a(main.c.obj): in function `k_sleep':
D:\AA\prov\provisioning_image\smp_svr\build_9160_shell\mcuboot\zephyr\include\generated\syscalls\kernel.h:100: undefined reference to `z_impl_k_sleep'
d:/aa/toolchains/31f4403e35/opt/zephyr-sdk/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/12.2.0/../../../../arm-zephyr-eabi/bin/ld.bfd.exe: app/libapp.a(main.c.obj): in function `k_sem_give':
D:\AA\prov\provisioning_image\smp_svr\build_9160_shell\mcuboot\zephyr\include\generated\syscalls\kernel.h:1089: undefined reference to `z_impl_k_sem_give'
d:/aa/toolchains/31f4403e35/opt/zephyr-sdk/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/12.2.0/../../../../arm-zephyr-eabi/bin/ld.bfd.exe: app/libapp.a(main.c.obj): in function `k_thread_create':
D:\AA\prov\provisioning_image\smp_svr\build_9160_shell\mcuboot\zephyr\include\generated\syscalls\kernel.h:50: undefined reference to `z_impl_k_thread_create'
I find these functions are defined in zephyr/kernel/sched.c which is only included if CONFIG_MULTITHREAD, however the mcuboot build does not have CONFIG_MULTITHREAD.
Does nrf9160 mcuboot need CONFIG_MULTITHREAD even though nrf5340 mcuboot does not?
