Our current build uses a mess of CMake, Makefile, and Shell scripts to call CubeMX.

It seems that the custom-toolchain.sh file is not properly called by Make on Linux (my WSL system freezes on this step). Instead of fixing the current system, I think we should move to a pure CMake setup for determining temporal dependencies (currently makefile decides which files are out of date) and use Python for the more intricate modifications (like editing the generated toolchain.cmake file).