Function usage

lib_acl_cpp/samples/multicast/main.cpp:128–139

};

static void usage(const char* proc) {
	printf("usage: %s -h [help]\r\n"
		" -m multicast_addr\r\n"
		" -l local_iface[default: 0.0.0.0]\r\n"
		" -p port[default: 8089]\r\n"
		" -n count_for_sender[default: 10000]\r\n"
		" -w senders_thread_count[default: 1]\r\n"
		" -r readers_thread_count[default: 0]\r\n"
		" -E [if echo the read data, default: false]\r\n"
		" -O [if enable IP_MULTICAST_LOOP, default: false]\r\n"
		, proc);
}

int main(int argc, char* argv[]) {
	acl::string multicast_addr, local_iface = "0.0.0.0";