To install, get the XFST library from http://www.fsmbook.com and copy the dynamic library to /usr/local/lib
or add its path to the (DY)LD_LIBRARY_PATH
environment variable.
Then compile the python extension by specifying the path of the XFST API with the XFSM
environment variable:
XFSM=/path/to/xfsm_api python setup.py install