stat = notmuch_database_create_with_config (NULL, "", NULL, NULL, &msg);
stat = notmuch_database_create_with_config (NULL, "", NULL, NULL, &msg);
stat = notmuch_database_create_with_config (argv[1], "", NULL, &db, &msg);
stat = notmuch_database_create_with_config (argv[1], "", NULL, &db, &msg);