make bindings_python error

[Guohao23]

ros2 :galactic ubuntu :20.04 guo@Guo:~/crazyflie-firmware$ make bindings_python Makefile:213: warning: overriding recipe for target 'bindings_python' tools/kbuild/Makefile.kbuild:147: warning: ignoring old recipe for target 'bindings_python' make[1]: Entering directory '/home/guo/crazyflie-firmware/build' make[1]: Nothing to be done for 'bindings_python'. make[1]: Leaving directory '/home/guo/crazyflie-firmware/build' swig -python -Isrc/modules/interface -Isrc/hal/interface -Isrc/utils/interface -Isrc/modules/interface/controller -Isrc/platform/interface -Isrc/modules/interface/outlierfilter -Isrc/modules/interface/kalman_core -o build/cffirmware_wrap.c bindings/cffirmware.i python3 bindings/setup.py build_ext --inplace In file included from src/modules/interface/kalman_core/kalman_core.h:56, from build/cffirmware_wrap.c:2757: src/utils/interface/cf_math.h:35:10: fatal error: arm_math.h: No such file or directory 35 | #include "arm_math.h" | ^~~~ compilation terminated. error: command '/usr/bin/x86_64-linux-gnu-gcc' failed with exit code 1 make: *** [Makefile:214: bindings_python] Error 1

[knmcguire]

You forgot to do --recursive as per instructions. Do git submodule init and then git submodule update

Duplicate of https://github.com/IMRCLab/crazyswarm2/discussions/486

[jpreiss]

One situation where you get this error: if you clone a fork of this repo whose master branch is super old (like 2+ years), its submodule for CMSIS points to a different repo. If you then check out a feature branch that's more recent, the submodule url won't get updated automatically. A git submodule sync && git submodule update will fix it.

[knmcguire]

@Guohao23 could you confirm that this fixed your problem? then we can close this issue