Hi.
I try to build the nrf_audio sample as BIS headset with enabled FOTA and NCS2.7.0 and get the following link error for the ipc_radio image:
FAILED: zephyr/zephyr_pre0.elf zephyr/zephyr_pre0.map nrf5340_audio/build/sink-fota/ipc_radio/zephyr/zephyr_pre0.map
ld.bfd.exe: region `FLASH' overflowed by 2976 bytes
The b0n bootloader links fine with this output:
Memory region Used Size Region Size %age Used FLASH: 23874 B 34176 B 69.86% RAM: 3528 B 64 KB 5.38%
As you can see there is 10KiB unused space in the b0n partition. Therefore I tried to reduce the size of this partition from 0x7800 to 0x6800. I tried to set the config variables CONFIG_PM_PARTITION_SIZE_B0_IMAGE in the corresponding sysbuild conf files (sysbuild/b0n/proj_fota.conf and sysbuild/ipc_radio/proj_fota.conf) or in sysbuild_fota.conf (with SB_ prefix), but my setting is ignored or there is a cmake configure error.
How can I reduce the b0n partition size?