The MPI::Fint type is included in a table in A.1.1 in MPI-2.1 (and  
2.0), but it looks like its inclusion is a mistake.  The issue is  
pretty simple; see the following for details:
     https://svn.mpi-forum.org/trac/mpi-forum-web/wiki/mpi22/MPI%3A%3AFint
-- 
Jeff Squyres
Cisco Systems