typedef struct _notmuch_config notmuch_config_t;
notmuch_config_t *
-notmuch_config_open (void *ctx, const char *filename);
+notmuch_config_open (void *ctx,
+ const char *filename,
+ notmuch_bool_t *is_new_ret);
void
notmuch_config_close (notmuch_config_t *config);