+/** \ingroup MPI scatter
+ * \brief The list of all available allgather collectives
+ */
+XBT_PUBLIC_DATA(s_mpi_coll_description_t) mpi_coll_scatter_description[];
+XBT_PUBLIC_DATA(int (*mpi_coll_scatter_fun)
+ (void *sendbuf, int sendcount, MPI_Datatype sendtype,
+ void *recvbuf, int recvcount, MPI_Datatype recvtype,
+ int root, MPI_Comm comm));
+
+/** \ingroup MPI barrier
+ * \brief The list of all available allgather collectives
+ */
+XBT_PUBLIC_DATA(s_mpi_coll_description_t) mpi_coll_barrier_description[];
+XBT_PUBLIC_DATA(int (*mpi_coll_barrier_fun)
+ (MPI_Comm comm));
+
+