MPI_CALL(XBT_PUBLIC(int), MPI_Pack_size, (int incount, MPI_Datatype datatype, MPI_Comm comm, int* size));
MPI_CALL(XBT_PUBLIC(int), MPI_Cart_coords, (MPI_Comm comm, int rank, int maxdims, int* coords));
MPI_CALL(XBT_PUBLIC(int), MPI_Cart_create, (MPI_Comm comm_old, int ndims, int* dims, int* periods, int reorder, MPI_Comm* comm_cart));
MPI_CALL(XBT_PUBLIC(int), MPI_Pack_size, (int incount, MPI_Datatype datatype, MPI_Comm comm, int* size));
MPI_CALL(XBT_PUBLIC(int), MPI_Cart_coords, (MPI_Comm comm, int rank, int maxdims, int* coords));
MPI_CALL(XBT_PUBLIC(int), MPI_Cart_create, (MPI_Comm comm_old, int ndims, int* dims, int* periods, int reorder, MPI_Comm* comm_cart));