#include "../colls_private.hpp"
namespace simgrid{
namespace smpi{
-int Coll_allreduce_redbcast::allreduce(void *buf, void *buf2, int count,
+int Coll_allreduce_redbcast::allreduce(const void *buf, void *buf2, int count,
MPI_Datatype datatype, MPI_Op op,
MPI_Comm comm)
{