I just got bro read the manual, and am still looking at the src.
In order to get it to build w/ g++ 3.1 I had to change a few files,
all changes like:
change: (DFA.h line 123)
friend DFA_State; // for DFA_State::ComputeXtion
friend class DFA_State; // for DFA_State::ComputeXtion
Also, how active is development? Looking at the file dates
it seems like nothing has changes since last Sept.