Conditioanl compilation.

RE: Conditioanl compilation.

Kazi Afroza Sultana — Wed, 23 Jul 2025 14:22:24 GMT

1. Yes. You have to add the configurations of mcuboot from the default MCUboot prj.conf of the SDK. In addition to the change, you want to make you have to add this default one as well.

If you only want to add or override a few settings, you should instead use mcuboot.conf at the appropriate level, which overlays the default configuration rather than replacing it entirely.

2. . I am also trying to take diffrent pm_static files for each board. I am trying to use the pm_static_<board name>.yaml convetntion but for some reason the build system doesnt pick it up, why is that?

Can you show me the inside picture of your application folder?

RE: Conditioanl compilation.

shlomots — Mon, 21 Jul 2025 09:33:44 GMT

thanks, few followups,
1. I actually found out I can do that few moments ago, but the problem is once I create this mcuboot folder, it doesn't take the base prj.conf of the mcuboot imagae, forcing me to write one myself and putting it inside the mcuboot folder. If I create this folder, it means I have to override the entire prj.conf?
2. I am also trying to take diffrent pm_static files for each board. I am trying to use the pm_static_<board name>.yaml convetntion but for some reason the build system doesnt pick it up, why is that?
I am using ncs 2.7.0.

RE: Conditioanl compilation.

Kazi Afroza Sultana — Mon, 21 Jul 2025 09:28:29 GMT

Hello Sholomo,

Setting separate configurations for the specific board (for the child image in a multi-board project), you have to use child_image/mcuboot/boards directory in the project. For each board,

child_image/mcuboot/boards/nrf5340dk_nrf5340_cpuapp.conf (for nrf5340dk)
child_image/mcuboot/boards/nrf52840dk_nrf52840.conf (for nrf52840dk)

For example, in your case you can place the configuration files in child_image/mcuboot/boards/nrf5340dk_nrf5340_cpuapp.conf file

CONFIG_BOOT_IMAGE_ACCESS_HOOK_NRF5340=y
CONFIG_BOOT_IMAGE_ACCESS_HOOKS=y

CONFIG_NRF53_MULTI_IMAGE_UPDATE=y
CONFIG_UPDATEABLE_IMAGE_NUMBER=2
CONFIG_PCD_APP=y

There is a previous case (+) Support for separate mcuboot configurations for nrf52840 and nrf5340 - Nordic Q&A - Nordic DevZone - Nordic DevZone, you can look at.

Thanks.

Kazi