Setting up the build environment
I usually compile my firmware in Linux. I use either Ubuntu in a virtual machine or Raspbian on a Raspberry Pi. They are both Debian based and the same procedure should work on either.Start with a fresh install of the OS.
Then update the list of software packages.
sudo apt-get update
Update all the installed packages.
sudo apt-get upgrade
Install the required packages for compiling TMK and ChibiOS
sudo apt-get install gcc-avr avr-libc dfu-programmer git make gcc-arm-none-eabi
Clone the TMK repository
git clone https://github.com/di0ib/tmk_keyboard.git
Change to the chibios folder
cd tmk_keyboard/tmk_core/tool/chibios/
Clone the stable branch of ChibiOS repo
git clone -b stable_17.6.x https://github.com/ChibiOS/ChibiOS.git
Clone the ChibiOS-Contrib repo
git clone https://github.com/ChibiOS/ChibiOS-Contrib.git
That's it. You should be able to compile for TeensyLC, Teensy3.2, Maple Mini, etc...
This video goes through the process on Ubuntu 18.04 LTS server.
