Function mpi::ffi::MPI_Dist_graph_create

pub unsafe extern fn MPI_Dist_graph_create(comm_old: MPI_Comm,
                                           n: c_int,
                                           nodes: *const c_int,
                                           degrees: *const c_int,
                                           targets: *const c_int,
                                           weights: *const c_int,
                                           info: MPI_Info,
                                           reorder: c_int,
                                           newcomm: *mut MPI_Comm)
                                           -> c_int