In order to use gcj to compile the java binding, you must also have development
files of libgcj. On Debian systems that translates to:- gcj 3.3-> libgcj4-dev
- gcj 3.4-> libgcj5-dev
- gcj 4.0-> libgcj6-dev
- gcj 4.1-> libgcj7-dev
- gcj 4.2-> libgcj8-dev
- gcj 4.3-> libgcj9-dev