XBT_PRIVATE void TRACE_smpi_init(int rank);
XBT_PRIVATE void TRACE_smpi_finalize(int rank);
-XBT_PRIVATE const char* encode_datatype(MPI_Datatype datatype, int* known);
+XBT_PRIVATE const char* encode_datatype(MPI_Datatype datatype);
class smpi_trace_call_location_t {
public: