Function mpi::ffi::MPI_Gatherv

pub unsafe extern fn MPI_Gatherv(sendbuf: *const c_void,
                                 sendcount: c_int,
                                 sendtype: MPI_Datatype,
                                 recvbuf: *mut c_void,
                                 recvcounts: *const c_int,
                                 displs: *const c_int,
                                 recvtype: MPI_Datatype,
                                 root: c_int,
                                 comm: MPI_Comm)
                                 -> c_int