写了一个mqtt的client程序，编译时报错如何解决？

#include <stdio.h>
#include <stdlib.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <string.h>
#include <unistd.h>
#include <vector>
#include <mutex>

#include "MQTTAsync.h"
#define PUB_MQTT_TOPIC           "service2wuxi"
#define PUB_MQTT_CLIENTID        "SERVICE_PUB_MQTT"
#define QOS                       0
#define KEY_MQTT_BROKER_ADDRESS   "172.0.0.1"
#define KEY_MQTT_BROKER_PORT     1883
#define BUFFER_SIZE              1024
int main()
{
    int ret;
    char input_msg[BUFFER_SIZE];
    char recv_msg[BUFFER_SIZE] = "hello this msg is send from yancheng! ";
    char address[] = "tcp://localhost:1883";
    //1.创建一个客户端对象
    MQTTAsync pub_client;
    //初始化MQTT Client选项
    MQTTAsync_connectOptions conn_opts = MQTTAsync_connectOptions_initializer;
    //声明消息token
    //MQTTClient_deliveryToken token;   
    //使用参数创建一个client，并将其赋值给之前声明的client
 MQTTAsync_create(&pub_client, address, PUB_MQTT_CLIENTID, MQTTCLIENT_PERSISTENCE_NONE, NULL);


    //MQTTAsync pub_client_ = client;
    MQTTAsync_setCallbacks(pub_client, NULL, NULL, NULL, NULL);
    //2.设置连接MQTT服务器的选项
    conn_opts.keepAliveInterval = 20;
        conn_opts.cleansession = 1;
        //conn_opts.username = USERNAME;
    //conn_opts.password = PASSWORD;
        conn_opts.onSuccess = NULL;
        conn_opts.automaticReconnect = 1;
        conn_opts.context = pub_client;
        MQTTAsync_connectOptions pub_opts_ = conn_opts;
        //使用MQTTClient_connect将client连接到服务器，使用指定的连接选项。成功则返回MQTTCLIENT_SUCCESS
        if ((ret = MQTTAsync_connect(pub_client, &conn_opts)) != MQTTASYNC_SUCCESS)
        {
                printf("Failed to start connect, return code %d\n", ret);
        }
    //初始化MQTT MQTTClient_message选项
    MQTTAsync_responseOptions opts = MQTTAsync_responseOptions_initializer;
    MQTTAsync_message pubmsg = MQTTAsync_message_initializer;
    opts.context = pub_client;
    pubmsg.payload = recv_msg;
    pubmsg.payloadlen = (int)strlen(recv_msg);
    pubmsg.qos = QOS;
    pubmsg.retained = 0;

    if ((ret = MQTTAsync_sendMessage(pub_client, PUB_MQTT_TOPIC, &pubmsg, &opts)) != MQTTASYNC_SUCCESS)
    {
        printf("MQTT sendMsg failed ,errCode-->%d", ret);
    }


    return 0;
}

编译时报错

v2x@ubuntu:~/Desktop/yancheng/mqttClient$ g++ test123.c -o test123 -std=c++11
/tmp/ccT4gVxQ.o: In function `main':
test123.c:(.text+0xf5): undefined reference to `MQTTAsync_create'
test123.c:(.text+0x119): undefined reference to `MQTTAsync_setCallbacks'
test123.c:(.text+0x185): undefined reference to `MQTTAsync_connect'
test123.c:(.text+0x383): undefined reference to `MQTTAsync_sendMessage'
collect2: error: ld returned 1 exit status
网上有人说缺少编译的库文件。

后来我到网上下载了mqtt 的源代码，编译了一下，结果编译出的库文件是arm架构的