Dependencies:

$ opam pin add GT https://github.com/Kakadu/GT.git -n -y

$ opam install camlp5 -y

$ opam install GT ocamlfind -y

Build & use:

$ make

$ gcc -m32 -c runtime.c

$ RUNTIME=. ./compiler file.expr

$ ./file

If make fails with an error which states that GT.Syntax.All cannot be found, make sure you initialized and configured opam:

$ opam init

$ eval `opam config env`

Ostap library:

$ opam pin add ostap https://github.com/dboulytchev/ostap.git -n -y

$ opam install ostap -y