The firmware blinks an LED connected to P20 (pin #1). The target MCU is R5F102AA (RL78/G12 in LSSOP-30)
docker run --rm -v "$(pwd):/src" msalau/rl78-elf-llvm make
or
./build.sh
PATH=<path-to-rl78-llvm>/bin/:${PATH} make
A CI workflow to build the firmware in a Docker container which has LLVM for RL78 in it.
The image from Docker Hub used: msalau/rl78-elf-llvm
The final SRecord image is saved in artifacts.