Given you have all dependencies installed (SDL2. The others are copied in the source), then you just need to run:
$ mkdir build/ && cd build/
$ cmake ..
$ cmake --build . -j$(nproc)
Note: In debian-based systems such as Ubuntu, SDL2 is available in the package manager, you can install it with
$ sudo apt install libsdl2-dev
SDL2 is also available with Conan and other package managers.
You can run tests using ctest from the build folder:
$ ctest
There are example executables in the examples/ folder. You can run micro16 as below, from the build folder:
$ ./src/micro16 ../examples/led_blink.micro16