This is a convenience starting point to allow quick and easy use of FreeRTOS on an Arduino Uno board. If you are looking to make a serious project, I strongly recommend you to refer to feilipu/avrfreertos and the official FreeRTOS documentation and source.
To build the project run make.
After the program is built without errors, run make program to flash your code to the Arduino board. You may need to edit the Makefile to fit your system configuration regarding the serial port path.
Edit main.c, add any extra file you may need and edit the Makefile to include your extra files.