[MPICH] const?

[Nico Kruithof]

Hello,

The prototype of MPI_Send is:
int MPI_Send( void *buf, int count, MPI_Datatype datatype, int dest, 
              int tag, MPI_Comm comm )

Can anybody tell me why buf is not const? Can buf be changed during a
send?

Bests,
Nico Kruithof