MPI_CALL(XBT_PUBLIC(int), MPI_Attr_get, (MPI_Comm comm, int keyval, void* attr_value, int* flag));
MPI_CALL(XBT_PUBLIC(int), MPI_Attr_put, (MPI_Comm comm, int keyval, void* attr_value));
MPI_CALL(XBT_PUBLIC(int), MPI_Rsend, (void* buf, int count, MPI_Datatype datatype, int dest, int tag, MPI_Comm comm));
MPI_CALL(XBT_PUBLIC(int), MPI_Attr_get, (MPI_Comm comm, int keyval, void* attr_value, int* flag));
MPI_CALL(XBT_PUBLIC(int), MPI_Attr_put, (MPI_Comm comm, int keyval, void* attr_value));
MPI_CALL(XBT_PUBLIC(int), MPI_Rsend, (void* buf, int count, MPI_Datatype datatype, int dest, int tag, MPI_Comm comm));