I get errors when try to build the firmware. I seriously have no idea what you mean by this:
arm-none-eabi-gcc and other required gcc/arm binaries not in the PATH. Solution: Add the /bin folder to your $PATH (i.e. export PATH="$PATH:<SOME_GCC_ARM_DIR>/bin). Google “Add binary to PATH” for more details.
I searched Google, nothing close to my answer. Any tips?