+void (*Colls::smpi_coll_cleanup_callback)();
+
+/* these arrays must be nullptr terminated */
+s_mpi_coll_description_t Colls::mpi_coll_gather_description[] = {
+ COLL_GATHERS(COLL_DESCRIPTION, COLL_COMMA), {nullptr, nullptr, nullptr} };
+s_mpi_coll_description_t Colls::mpi_coll_allgather_description[] = {
+ COLL_ALLGATHERS(COLL_DESCRIPTION, COLL_COMMA), {nullptr, nullptr, nullptr} };
+s_mpi_coll_description_t Colls::mpi_coll_allgatherv_description[] = {
+ COLL_ALLGATHERVS(COLL_DESCRIPTION, COLL_COMMA), {nullptr, nullptr, nullptr} };
+s_mpi_coll_description_t Colls::mpi_coll_allreduce_description[] ={
+ COLL_ALLREDUCES(COLL_DESCRIPTION, COLL_COMMA), {nullptr, nullptr, nullptr} };
+s_mpi_coll_description_t Colls::mpi_coll_reduce_scatter_description[] = {
+ COLL_REDUCE_SCATTERS(COLL_DESCRIPTION, COLL_COMMA), {nullptr, nullptr, nullptr} };
+s_mpi_coll_description_t Colls::mpi_coll_scatter_description[] ={
+ COLL_SCATTERS(COLL_DESCRIPTION, COLL_COMMA), {nullptr, nullptr, nullptr} };
+s_mpi_coll_description_t Colls::mpi_coll_barrier_description[] ={
+ COLL_BARRIERS(COLL_DESCRIPTION, COLL_COMMA), {nullptr, nullptr, nullptr} };
+s_mpi_coll_description_t Colls::mpi_coll_alltoall_description[] = {
+ COLL_ALLTOALLS(COLL_DESCRIPTION, COLL_COMMA), {nullptr, nullptr, nullptr} };
+s_mpi_coll_description_t Colls::mpi_coll_alltoallv_description[] = {
+ COLL_ALLTOALLVS(COLL_DESCRIPTION, COLL_COMMA), {nullptr, nullptr, nullptr} };
+s_mpi_coll_description_t Colls::mpi_coll_bcast_description[] = {
+ COLL_BCASTS(COLL_DESCRIPTION, COLL_COMMA), {nullptr, nullptr, nullptr} };
+s_mpi_coll_description_t Colls::mpi_coll_reduce_description[] = {
+ COLL_REDUCES(COLL_DESCRIPTION, COLL_COMMA), {nullptr, nullptr, nullptr} };