Add CMake build files

[rhgndf]

Allows building with cmake instead, so there is no need to install STM32CubeIDE to build the project. The CMakeLists.txt are generated from creating a STM32 project in STMCube32IDE.

Build commands:

cmake -DCMAKE_TOOLCHAIN_FILE=cubeide-gcc.cmake  -S ./ -B Release -G"Unix Makefiles" -DCMAKE_BUILD_TYPE=Release
make -C Release VERBOSE=1 -j $(nproc)

Replace Release with Debug for debug build.

[das-Iro]

I have tested compiling on macOS 15.2 & Archlinux
Release works 👍 (flashed file from macOS compile and tested audio input to verify function)
Debug seems broken in linking step (both systems, same error)

• undefined reference to `_sbrk'

Side node to -j will spawn an unlimited amount of jobs which may result in out of memory situations, I recommend -j 8

[skuep]

I don't really use the Debug build, but you're right, it shouldn't be broken.

Thanks for the contribution, will take me some time to look at it

[das-Iro]

I don't really use the Debug build, but you're right, it shouldn't be broken.

Neither do I so no hurry.

[rhgndf]

Same error with Release builds, but it was fixed with:

• Removing ${RUNTIME_LIBRARY} from CMAKE_C_FLAGS
• Removing ${RUNTIME_LIBRARY_SYSCALLS} from CMAKE_EXE_LINKER_FLAGS

[rhgndf]

Side node to -j will spawn an unlimited amount of jobs which may result in out of memory situations, I recommend -j 8

Fixed!