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POWhat is causing my compilation errors on socket code and how do I fix it?
 

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  1. POWhat is causing my compilation errors on socket code and how do I fix it?
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    <p>Here is my code from a tutorial <a href="http://www.codeproject.com/Articles/13071/Programming-Windows-TCP-Sockets-in-C-for-the-Begin#" rel="nofollow">which is here</a>: </p> <pre><code>//CONNECT TO REMOTE HOST (CLIENT APPLICATION) //Include the needed header files. //Don't forget to link libws2_32.a to your program as well #include &lt;winsock.h&gt; SOCKET s; //Socket handle //CONNECTTOHOST – Connects to a remote host bool ConnectToHost(int PortNo, char* IPAddress) { //Start up Winsock… WSADATA wsadata; int error = WSAStartup(0x0202, &amp;wsadata); //Did something happen? if (error) return false; //Did we get the right Winsock version? if (wsadata.wVersion != 0x0202) { WSACleanup(); //Clean up Winsock return false; } //Fill out the information needed to initialize a socket… SOCKADDR_IN target; //Socket address information target.sin_family = AF_INET; // address family Internet target.sin_port = htons (PortNo); //Port to connect on target.sin_addr.s_addr = inet_addr (IPAddress); //Target IP s = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP); //Create socket if (s == INVALID_SOCKET) { return false; //Couldn't create the socket } //Try connecting... if (connect(s, (SOCKADDR *)&amp;target, sizeof(target)) == SOCKET_ERROR) { return false; //Couldn't connect } else return true; //Success } //CLOSECONNECTION – shuts down the socket and closes any connection on it void CloseConnection () { //Close the socket if it exists if (s) closesocket(s); WSACleanup(); //Clean up Winsock } </code></pre> <p>The command I use to compile is: g++ -o winsoc.exe -lwsock32 winsoc.cpp</p> <p>The compilers output is:</p> <pre><code>C:\Users\Leon\AppData\Local\Temp\ccPq0k1Y.o:winsoc.cpp:(.text+0x1b): undefined r eference to `WSAStartup@8' C:\Users\Leon\AppData\Local\Temp\ccPq0k1Y.o:winsoc.cpp:(.text+0x3f): undefined r eference to `WSACleanup@0' C:\Users\Leon\AppData\Local\Temp\ccPq0k1Y.o:winsoc.cpp:(.text+0x5a): undefined r eference to `htons@4' C:\Users\Leon\AppData\Local\Temp\ccPq0k1Y.o:winsoc.cpp:(.text+0x6c): undefined r eference to `inet_addr@4' C:\Users\Leon\AppData\Local\Temp\ccPq0k1Y.o:winsoc.cpp:(.text+0x8e): undefined r eference to `socket@12' C:\Users\Leon\AppData\Local\Temp\ccPq0k1Y.o:winsoc.cpp:(.text+0xc0): undefined r eference to `connect@12' C:\Users\Leon\AppData\Local\Temp\ccPq0k1Y.o:winsoc.cpp:(.text+0xf1): undefined r eference to `closesocket@4' C:\Users\Leon\AppData\Local\Temp\ccPq0k1Y.o:winsoc.cpp:(.text+0xf9): undefined r eference to `WSACleanup@0' c:/mingw/bin/../lib/gcc/mingw32/4.6.2/../../../libmingw32.a(main.o): In function `main': C:\MinGW\msys\1.0\src\mingwrt/../mingw/main.c:73: undefined reference to `WinMai n@16' collect2: ld returned 1 exit status </code></pre> <p>Im using windows 7, MinGW as my compiler and have tried using visual studio express to compile also. </p>
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    1. USuser2503170
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    1. CODid you read the error messages? You misspelled `if` as `If` and `wsadata` as `wssadata`.
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      1. POWhat is causing my compilation errors on socket code and how do I fix it?
      1. USCasey
    2. COedited since this has nothing to do with sockets.
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      1. POWhat is causing my compilation errors on socket code and how do I fix it?
      1. USxaxxon
    3. COYou probably want `g++ winsoc.cpp -o winsoc.exe -lwsock32` as explained here: http://stackoverflow.com/questions/2033608/mingw-linker-error-winsock You also have no WinMain function.
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      1. POWhat is causing my compilation errors on socket code and how do I fix it?
      1. USRetired Ninja
 

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