void mpi_alltoallw_ ( void *sendbuf, int *sendcnts, int *sdispls, int* old_sendtypes, void *recvbuf, int *recvcnts,
int *rdispls, int* old_recvtypes, int* comm, int* ierr){
int size = simgrid::smpi::Comm::f2c(*comm)->size();
void mpi_alltoallw_ ( void *sendbuf, int *sendcnts, int *sdispls, int* old_sendtypes, void *recvbuf, int *recvcnts,
int *rdispls, int* old_recvtypes, int* comm, int* ierr){
int size = simgrid::smpi::Comm::f2c(*comm)->size();