void mpi_alltoallw_ ( void *sendbuf, int *sendcnts, int *sdispls, int*sendtypes, void *recvbuf, int *recvcnts, int *rdispls, int*recvtypes,
int* comm, int* ierr);
void mpi_exscan_ (void *sendbuf, void *recvbuf, int* count, int* datatype, int* op, int* comm, int* ierr);
void mpi_alltoallw_ ( void *sendbuf, int *sendcnts, int *sdispls, int*sendtypes, void *recvbuf, int *recvcnts, int *rdispls, int*recvtypes,
int* comm, int* ierr);
void mpi_exscan_ (void *sendbuf, void *recvbuf, int* count, int* datatype, int* op, int* comm, int* ierr);