sway/config/output.c:624:54: error: format specifies type 'long' but the argument has type 'size_t' (aka 'unsigned int') [-Werror,-Wformat] sway_log(SWAY_DEBUG, "spawn_swaybg cmd[%ld] = %s", k, cmd[k]); ~~~ ^ %zu include/log.h:40:74: note: expanded from macro 'sway_log' _sway_log(verb, "[%s:%d] " fmt, _sway_strip_path(__FILE__), __LINE__, ##__VA_ARGS__) ^~~~~~~~~~~