+typedef int MPI_Copy_function(MPI_Comm oldcomm, int keyval, void* extra_state, void* attribute_val_in,
+ void* attribute_val_out, int* flag);
+typedef int MPI_Delete_function(MPI_Comm comm, int keyval, void* attribute_val, void* extra_state);
+#define MPI_Comm_copy_attr_function MPI_Copy_function
+#define MPI_Comm_delete_attr_function MPI_Delete_function
+typedef int MPI_Type_copy_attr_function(MPI_Datatype type, int keyval, void* extra_state, void* attribute_val_in,
+ void* attribute_val_out, int* flag);
+typedef int MPI_Type_delete_attr_function(MPI_Datatype type, int keyval, void* attribute_val, void* extra_state);
+typedef int MPI_Win_copy_attr_function(MPI_Win win, int keyval, void* extra_state, void* attribute_val_in,
+ void* attribute_val_out, int* flag);
+typedef int MPI_Win_delete_attr_function(MPI_Win win, int keyval, void* attribute_val, void* extra_state);
+#define MPI_COMM_NULL_COPY_FN ((MPI_Comm_copy_attr_function*)0)
+#define MPI_COMM_NULL_DELETE_FN ((MPI_Comm_delete_attr_function*)0)
+#define MPI_TYPE_NULL_COPY_FN ((MPI_Type_copy_attr_function*)0)
+#define MPI_TYPE_NULL_DELETE_FN ((MPI_Type_delete_attr_function*)0)
+#define MPI_WIN_NULL_COPY_FN ((MPI_Win_copy_attr_function*)0)
+#define MPI_WIN_NULL_DELETE_FN ((MPI_Win_delete_attr_function*)0)
+
+