Infinite build loop with some examples, dirty build.ninja

Question

With multiple of the provided samples with the SDK, I'm getting a repeated build loop that ultimately fails due to a remaining "dirty build.ninja". This is primarily with some Edge Impulse samples, so I've posted there as well, but these samples are provided in the nRF SDK. 
 The build output is as follows, from the Wrapper sample using a custom replication of the FOMO sample: 
 [143/158] No update step for 'edge_impulse_project' [144/158] Performing patch step for 'edge_impulse_project' [145/158] Performing configure step for 'edge_impulse_project' -- The C compiler identification is GNU 12.2.0 -- The CXX compiler identification is GNU 12.2.0 -- The ASM compiler identification is GNU -- Found assembler: /opt/nordic/ncs/toolchains/20d68df7e5/opt/zephyr-sdk/arm-zephyr-eabi/bin/arm-zephyr-eabi-gcc -- Configuring done -- Generating done -- Build files have been written to: /opt/nordic/ncs/v2.5.2/nrf/samples/edge_impulse/wrapper_2/build/edge_impulse/src/edge_impulse_project-build [145/158] Performing build step for 'edge_impulse_project' [0/1] Re-running CMake... -- Configuring done -- Generating done -- Build files have been written to: /opt/nordic/ncs/v2.5.2/nrf/samples/edge_impulse/wrapper_2/build/edge_impulse/src/edge_impulse_project-build [0/1] Re-running CMake... -- Configuring done -- Generating done -- Build files have been written to: /opt/nordic/ncs/v2.5.2/nrf/samples/edge_impulse/wrapper_2/build/edge_impulse/src/edge_impulse_project-build [0/1] Re-running CMake... 
 .... 
 [0/1] Re-running CMake... -- Configuring done -- Generating done -- Build files have been written to: /opt/nordic/ncs/v2.5.2/nrf/samples/edge_impulse/wrapper_2/build/edge_impulse/src/edge_impulse_project-build ninja: error: manifest 'build.ninja' still dirty after 100 tries FAILED: edge_impulse/src/edge_impulse_project-stamp/edge_impulse_project-build edge_impulse/src/edge_impulse_project-build/libedge_impulse.a cd /opt/nordic/ncs/v2.5.2/nrf/samples/edge_impulse/wrapper_2/build/edge_impulse/src/edge_impulse_project-build && /opt/nordic/ncs/toolchains/20d68df7e5/Cellar/cmake/3.20.5/bin/cmake --build . ninja: build stopped: subcommand failed. FATAL ERROR: command exited with status 1: /opt/nordic/ncs/toolchains/20d68df7e5/bin/cmake --build /opt/nordic/ncs/v2.5.2/nrf/samples/edge_impulse/wrapper_2/build If anyone has seen this before or has a guess of how to fix it, that'd be greatly appreciated.

alnyland · Accepted Answer

The issue ended up being from a compile time error that was hidden in the print statements most of the time I tried. 
 /opt/nordic/ncs/v2.5.2/nrf/lib/edge_impulse/ei_wrapper.cpp: At global scope: /opt/nordic/ncs/v2.5.2/nrf/lib/edge_impulse/ei_wrapper.cpp:56:31: error: static assertion failed 56 | BUILD_ASSERT(DATA_BUFFER_SIZE > INPUT_WINDOW_SIZE); /opt/nordic/ncs/v2.5.2/zephyr/include/zephyr/toolchain/gcc.h:70:50: note: in definition of macro 'BUILD_ASSERT' 70 | #define BUILD_ASSERT(EXPR, MSG...) static_assert(EXPR, "" MSG) | ^~~~ /opt/nordic/ncs/v2.5.2/nrf/lib/edge_impulse/ei_wrapper.cpp:56:31: note: the comparison reduces to '(2500 > 9216)' 56 | BUILD_ASSERT(DATA_BUFFER_SIZE > INPUT_WINDOW_SIZE); /opt/nordic/ncs/v2.5.2/zephyr/include/zephyr/toolchain/gcc.h:70:50: note: in definition of macro 'BUILD_ASSERT' 70 | #define BUILD_ASSERT(EXPR, MSG...) static_assert(EXPR, "" MSG) | ^~~~ ninja: build stopped: subcommand failed. 
 
 By adding CONFIG_EI_WRAPPER_DATA_BUF_SIZE=[bigger size] to the prj.conf I was able to fix this issue. 
 
 Edit (an hour later): This only fixed it for the one project, the Continuous Motion project that was working before is not working currently.

Infinite build loop with some examples, dirty build.ninja

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