run arm cross compiler docker on Macbook M1
docker run --tty -d --name raspi-build multiarch/ubuntu-core:armhf-focal bash
docker exec -it multiarch/ubuntu-core:armhf-focal /bin/bash
docker commit cf0e6f86880b arm-compiler
OR:
git clone git@github.com:geerlingguy/raspberry-pi-pcie-devices.git
cd raspberry-pi-pcie-devices/extras/cross-compile
docker-compose up -d
docker attach cross-compile
By default, newer GCC versions do not create correct binaries for ARMv6. Even though you pass the correct -mcpu= flag to gcc, it will create startup code for the newer ARMv7 architecture. Running them on your RasPI Zero will cause an "Illegal Instruction" exception.
