C 如何使用libmosquitto编译

我正在尝试编译libmosquitto网站（底部）上提供的代码示例：

我使用的是Ubuntu 12.04，我已经安装了libmosquitto1和libmosquitto1开发包。在安装它们之前，我添加了MOSQUITO存储库：

sudo apt-add-repository ppa:mosquitto-dev/mosquitto-ppa
sudo apt-get update

我正在尝试编译以下示例：

gcc -lmosquitto mosquito.c -o mosquito

但我得到以下错误：

/tmp/cc6eU8kw.o: In function `my_connect_callback':
mosquito.c:(.text+0xf8): undefined reference to `mosquitto_subscribe'
/tmp/cc6eU8kw.o: In function `main':
mosquito.c:(.text+0x298): undefined reference to `mosquitto_lib_init'
mosquito.c:(.text+0x2b4): undefined reference to `mosquitto_new'
mosquito.c:(.text+0x310): undefined reference to `mosquitto_log_callback_set'
mosquito.c:(.text+0x324): undefined reference to `mosquitto_connect_callback_set'
mosquito.c:(.text+0x338): undefined reference to `mosquitto_message_callback_set'
mosquito.c:(.text+0x34c): undefined reference to `mosquitto_subscribe_callback_set'
mosquito.c:(.text+0x364): undefined reference to `mosquitto_connect'
mosquito.c:(.text+0x3b4): undefined reference to `mosquitto_loop'
mosquito.c:(.text+0x3c8): undefined reference to `mosquitto_destroy'
mosquito.c:(.text+0x3d0): undefined reference to `mosquitto_lib_cleanup'
collect2: ld returned 1 exit status

有人能给我一些关于如何编译这个简单示例的提示吗？

---

谢谢

您必须将

-lmosquito

放在末尾（在源文件之后）

或者更好：

gcc -Wall -Wextra -pedantic -o mosquito mosquito.c -lmosquitto

---

我认为您必须动态链接您的程序，尝试使用

gcc蚊子.c-o蚊子-lmosquitto

（是的，

-l

选项的位置非常关键）。

gcc -Wall -Wextra -pedantic -o mosquito mosquito.c -lmosquitto