編譯簡單的hello world ZeroMQ C例子，編譯標誌？

Question

試圖從zeromq教程編譯示例hello_world.c： http://zguide.zeromq.org/page:all#Ask-and-Ye-Shall-Receive 很確定我已經安裝了OSX Mountain Lion中的所有東西。

clang -Wall hwserver.c -o hwserver 

給我一個錯誤：

Undefined symbols for architecture x86_64: 
"_zmq_bind", referenced from: 
    _main in hwserver-OgrEe6.o 
"_zmq_ctx_new", referenced from: 
    _main in hwserver-OgrEe6.o 
"_zmq_msg_close", referenced from: 
    _main in hwserver-OgrEe6.o 
"_zmq_msg_data", referenced from: 
    _main in hwserver-OgrEe6.o 
"_zmq_msg_init", referenced from: 
    _main in hwserver-OgrEe6.o 
"_zmq_msg_init_size", referenced from: 
    _main in hwserver-OgrEe6.o 
"_zmq_msg_recv", referenced from: 
    _main in hwserver-OgrEe6.o 
"_zmq_msg_send", referenced from: 
    _main in hwserver-OgrEe6.o 
"_zmq_socket", referenced from: 
    _main in hwserver-OgrEe6.o 
ld: symbol(s) not found for architecture x86_64 
clang: error: linker command failed with exit code 1 (use -v to see invocation) 

我不是最有經驗的C.不知道如果我一定要添加一個編譯器標誌爲ZMQ dylib或頭或我的$ PATH是關閉。

libzmq.3.dylib 
libzmq.a 
libzmq.dylib 
libzmq.la 

，並在/ usr /本地/包括：

zmq.h 
zmq_utils.h 

和回聲$ PATH：

/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/local/lib/:/usr/local/include/ 

Answer 1

您列出

在/ usr/local/lib目錄

在你的問題的ZeroMQ庫，但你實際上並沒有鏈接與他們。在命令行改成這樣：

clang -Wall hwserver.c -o hwserver -L/usr/local/lib -lzmq 

的額外的參數說明：

• -L/usr/local/lib告知鏈接的路徑（/usr/local/lib）添加到庫搜索路徑。
• -lzmq告訴圖書館鏈接zmq圖書館。

$PATH環境變量與此無關，它只是告訴shell在哪裏查找命令。