You need to be able to link with
-lBox2D and use
#include <Box2D/Box2D.h>. This most likely necessitates installing Box2D through your distro's repositories, otherwise you might manually need to dabble w/ the include/linkage options throughout this project (Idris directives in
Physics/Box2D.idr and stuff in the
has an example of how to do it properly when
pkg-conf files are available.