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我是 Mosquitto 的新手，我想写一个简单的 C 客户端连接到 Mosquitto 的测试服务器：http ://test.mosquitto.org/

这是简单 C 客户端的代码，它是 Mosquitto 网站上示例的 99.9%：http: //pastie.org/private/orwicqjfjz8g8biurznca

编辑1：

我按照评论写了一个makefile而不是做

gcc -o test test.c

生成文件如下所示：

CC = gcc
CFLAGS = -I
DEPS = mosquitto.h

LIBS = -llibmosquitto

%.o: %.c $(DEPS)
    $(CC) -c -o $@ $< $(CFLAGS)

make: test.c
    $(CC) -m32 -Wall -o $@ $^ $(CFLAGS) $(LIBS)

.PHONY: clean

这是我得到的输出，这似乎是将 mosquitto 库与 gcc 链接起来的一些问题：

Undefined symbols for architecture i386:
  "_mosquitto_connect", referenced from:
  _main in cc6Blyda.o
  "_mosquitto_connect_callback_set", referenced from:
  _main in cc6Blyda.o
  "_mosquitto_destroy", referenced from:
  _main in cc6Blyda.o
  "_mosquitto_lib_cleanup", referenced from:
  _main in cc6Blyda.o
  "_mosquitto_lib_init", referenced from:
  _main in cc6Blyda.o
  "_mosquitto_log_callback_set", referenced from:
  _main in cc6Blyda.o
  "_mosquitto_loop", referenced from:
  _main in cc6Blyda.o
  "_mosquitto_message_callback_set", referenced from:
  _main in cc6Blyda.o
  "_mosquitto_new", referenced from:
  _main in cc6Blyda.o
  "_mosquitto_subscribe", referenced from:
  _my_connect_callback in cc6Blyda.o
  "_mosquitto_subscribe_callback_set", referenced from:
  _main in cc6Blyda.o
ld: symbol(s) not found for architecture i386
collect2: ld returned 1 exit status
make: *** [make] Error 1

注意：我使用自制软件安装 mosquitto，所以 lib 的路径是

/usr/local/Cellar/mosquitto/1.1/

感谢任何帮助！

问候

4

1 回答 1

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我通过我的makefile中的一些试验错误解决了链接问题。

这是最终的 makefile 的样子，它不会产生任何链接问题：

CC = gcc

LIBS = -lmosquitto

%.o: %.c 
    $(CC) -c -o $@ $< 

make: test.c
    $(CC) -Wall -o test $^ $(LIBS)

.PHONY: clean

谢谢

于 2013-04-17T08:54:46.890 回答