comm_fn            66 ompi/mpi/cxx/cxx_glue.h                                           const char *message, void *comm_fn);
comm_fn            93 ompi/mpi/cxx/intercepts.cc                                          const char *message, void *comm_fn)
comm_fn           100 ompi/mpi/cxx/intercepts.cc         (MPI::Comm::Errhandler_function*) comm_fn;