Building Serial_lte_modem sample fails for custom board

[I.gin]

Hello,
I want to build serial_lte_modem sample for a custom board based on nRF9151, but it fails with this error:

error: Aborting due to Kconfig warnings

I can build this sample for nRF9151DK board, and also I am able to build other samples (Hello_world and modem_shell) for my custom board successfully.
I'm using NRF SDK v2.9.1, using nrf extensions with vs code on macos.

The board definition was created by copying and modifying nrf9151DK definition and exists under application directory: boards/arm/board_name_folder

Could you tell me what's going wrong with this sample?

warning: HW_STACK_PROTECTION (defined at soc/nxp/s32/s32k1/Kconfig.defconfig:20, arch/Kconfig:283)
was assigned the value 'y' but got the value 'n'. Check these unsatisfied dependencies:
((SOC_SERIES_S32K1 && SOC_FAMILY_NXP_S32) || ARCH_HAS_STACK_PROTECTION) (=n). See
docs.zephyrproject.org/.../kconfig.html and/or look up
HW_STACK_PROTECTION in the menuconfig/guiconfig interface. The Application Development Primer,
Setting Configuration Values, and Kconfig - Tips and Best Practices sections of the manual might be
helpful too.

warning: FPROTECT (defined at /opt/nordic/ncs/v2.9.1/nrf/lib/fprotect/Kconfig:47) was assigned the
value 'y' but got the value 'n'. Check these unsatisfied dependencies: SOC_FAMILY_NORDIC_NRF (=n).
See docs.zephyrproject.org/.../kconfig.html and/or look up FPROTECT in the
menuconfig/guiconfig interface. The Application Development Primer, Setting Configuration Values,
and Kconfig - Tips and Best Practices sections of the manual might be helpful too.

warning: NRF_RTC_TIMER_USER_CHAN_COUNT (defined at soc/nordic/nrf53/Kconfig.sync_rtc:23,
drivers/timer/Kconfig.nrf_rtc:20) was assigned the value '0' but got the value ''. Check these
unsatisfied dependencies: ((NRF53_SYNC_RTC && SOC_SERIES_NRF53X && SOC_FAMILY_NORDIC_NRF) ||
(NRF_RTC_TIMER && SYS_CLOCK_EXISTS)) (=n). See
docs.zephyrproject.org/.../kconfig.html and/or look
up NRF_RTC_TIMER_USER_CHAN_COUNT in the menuconfig/guiconfig interface. The Application Development
Primer, Setting Configuration Values, and Kconfig - Tips and Best Practices sections of the manual
might be helpful too.

warning: ARM_MPU (defined at arch/arm64/core/cortex_r/Kconfig:10, arch/arm/core/mpu/Kconfig:8) was
assigned the value 'y' but got the value 'n'. Check these unsatisfied dependencies: ((CPU_HAS_MPU &&
CPU_AARCH64_CORTEX_R && ARM64) || (CPU_HAS_MPU && ARM)) (=n). See
docs.zephyrproject.org/.../kconfig.html and/or look up ARM_MPU in the
menuconfig/guiconfig interface. The Application Development Primer, Setting Configuration Values,
and Kconfig - Tips and Best Practices sections of the manual might be helpful too.

warning: ARM_TRUSTZONE_M (defined at arch/arm/core/cortex_m/tz/Kconfig:6) was assigned the value 'y'
but got the value 'n'. Check these unsatisfied dependencies: CPU_HAS_TEE (=n), ARMV8_M_SE (=n),
CPU_CORTEX_M (=n), ARM (=n). See
docs.zephyrproject.org/.../kconfig.html and/or look up
ARM_TRUSTZONE_M in the menuconfig/guiconfig interface. The Application Development Primer, Setting
Configuration Values, and Kconfig - Tips and Best Practices sections of the manual might be helpful
too.

warning: NRFX_NVMC (defined at modules/hal_nordic/nrfx/Kconfig:247, modules/hal_nordic/nrfx/Kconfig:247) has direct dependencies ((n || n || n || y) && HAS_NRFX) || ((n || n || n || y) && HAS_NRFX && 0) with value n, but is currently being y-selected by the following symbols:
- SOC_FLASH_NRF (defined at drivers/flash/Kconfig.nrf:10), with value y, direct dependencies (DT_HAS_NORDIC_NRF51_FLASH_CONTROLLER_ENABLED || DT_HAS_NORDIC_NRF52_FLASH_CONTROLLER_ENABLED || DT_HAS_NORDIC_NRF53_FLASH_CONTROLLER_ENABLED || DT_HAS_NORDIC_NRF91_FLASH_CONTROLLER_ENABLED) && !FLASH_NRF_FORCE_ALT && FLASH (value: y), and select condition (DT_HAS_NORDIC_NRF51_FLASH_CONTROLLER_ENABLED || DT_HAS_NORDIC_NRF52_FLASH_CONTROLLER_ENABLED || DT_HAS_NORDIC_NRF53_FLASH_CONTROLLER_ENABLED || DT_HAS_NORDIC_NRF91_FLASH_CONTROLLER_ENABLED) && !FLASH_NRF_FORCE_ALT && FLASH (value: y)

[Sigurd Hellesvik]

Hi,

How did you create your custom board?

I suggest that you test with the hello world sample first, to see if you get any errors with the simples possible sample.

Regards,
Sigurd Hellesvik

[I.gin]

I copied the folder:

/opt/nordic/ncs/v2.9.1/zephyr/boards/nordic/nrf9151dk

into my application’s boards/arm directory.

I then renamed the files and updated all file contents to reflect the new filenames and board name accordingly.

As mentioned earlier, I can successfully build the hello_world and modem_shell samples using this custom board definition. But when trying to build the serial_lte_modem sample, I get these errors.

[Sigurd Hellesvik]

I.gin said:

As mentioned earlier, I can successfully build the hello_world and modem_shell samples using this custom board definition. But when trying to build the serial_lte_modem sample, I get these errors.

Ah, I missed that part.

Did you build for "ns" or? (With TF-M) A lot of cellular projects have a requirement on TF-M.

[I.gin]

I build for "ns".
But I tried to build with both options and got the same results.

[Sigurd Hellesvik]

Something is off in your custom board settings.
I suggest one of the following methods:

1. Follow Lesson 3 – Adding custom board support to create a custom board. Sometimes following a guide helps you get it right the second time trying.

2. Go over Kconfig errors and investigate why they er wrong. For example: 

Find out why SOC_FAMILY_NORDIC_NRF is not set. Find out how this is set in the DK boardfiles, and then find out if it is set similarly in your custom board files.

[I.gin]

Thanks, my problem is solved.
I followed the 1st method. Still don't know what was wrong with my board definition, but did it again following 2nd excercise steps, and now it works fine.