I want to run a example of\ncs1.5.0\zephyr\samples\subsys\mgmt\mcumgr\smp_svr, but can not compile

[zhouhaifang]

i change nothing of the project. i want to DFU or FOTA nrf5340 fireware through ble

[Simon]

I think the issue happens due the Windows path length limitation. Check out this answer: https://devzone.nordicsemi.com/f/nordic-q-a/72187/v1-5-0-mcuboot-build-fail/297589#297589

Try naming the build folder 'build' instead of 'build_nrf5340dk_nrf5340_cpuapp'.

Best regards,

Simon