#define unused(x) x __attribute__ ((unused))
+#ifdef __cplusplus
+# define visible __attribute__((visibility("default")))
+#else
+# define visible
+#endif
+
/* Thanks to Andrew Tridgell's (SAMBA's) talloc for this definition of
* unlikely. The talloc source code comes to us via the GNU LGPL v. 3.
*/
* somewhere with some nasty C++ objects in it. We'll try to maintain
* ignorance of that here. (See notmuch_mset_messages_t in query.cc)
*/
-struct _notmuch_messages {
+struct visible _notmuch_messages {
notmuch_bool_t is_of_list_type;
notmuch_message_node_t *iterator;
};