Iam试图编译libmosquitto网站（底部）上提供的代码示例：http : //mosquitto.org/man/libmosquitto-3.html
Iam使用Ubuntu 12.04，我已经安装了libmosquitto1和libmosquitto1-dev软件包。在安装它们之前，我添加了mosquitto存储库：
sudo apt-add-repository ppa:mosquitto-dev/mosquitto-ppa
sudo apt-get update
Iam尝试将示例编译如下：
gcc -lmosquitto mosquito.c -o mosquito
但是我收到以下错误：
/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
有人可以给我一些有关如何编译此简单示例的提示吗？谢谢
您必须将-lmosquitto末尾（在源文件之后）。
gcc mosquito.c -lmosquitto -o mosquito
# or
gcc mosquito.c -o mosquito -lmosquitto
# or
gcc -o mosquito mosquito.c -lmosquitto
或更好：
gcc -Wall -Wextra -pedantic -o mosquito mosquito.c -lmosquitto
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