c++ - 对 imp_getaddrinfo 的 undefined reference

Question

我一直在学习如何通过 C++ 在 Windows 中进行网络编程，进展顺利，除了我遇到了一个问题，我现在大约 3-4 天都无法解决，我正在使用Dev-C++ 5.5.3(Orwell)，编译器为TDM-GCC 4.7.1。我在链接器参数中添加了 "-lwsock32"(不带引号)。一切正常除了 “freeaddrinfo” 和 “getaddrinfo”，下面是其中两个函数的内容。

undefined reference to `imp_getaddrinfo@16'

undefined reference to `imp_freeaddrinfo@4'

我在某处读到它要求我定义我想要的 Windows 版本使用，所以我根据需要定义了_WINNT_WIN32 0x0601，但没有用。这是我的代码(缩写):

#define _WINNT_WIN32 0x0601
#include <ws2tcpip.h>
#include <winsock2.h>
#include <stdio.h>

#define DEFAULT_PORT "27015"
// server

int main()
{
    WSADATA wsaData;                                
    ZeroMemory(&wsaData,sizeof(wsaData));
    int nResult = WSAStartup(MAKEWORD(2,2),&wsaData);
    if(nResult != 0)
     {
                printf(TEXT("WSAStartup function failed, value: %d\n"),nResult);
                Sleep(5000);
                return 0001;
     }
    else
      printf(TEXT("WSAStartup function has succeeded! value: %d\n"),nResult);
    struct addrinfo *result = NULL, *ptr = NULL, hints;
    ZeroMemory(&hints,sizeof(hints));
    hints.ai_family = AF_INET;
    hints.ai_socktype = SOCK_STREAM;
    hints.ai_protocol = IPPROTO_TCP;
    hints.ai_flags = AI_PASSIVE;
    nResult = getaddrinfo(NULL,DEFAULT_PORT,&hints,&result);
    if(nResult != 0)
    {
        printf("getaddrinfo did not return 0... failure...");
        WSACleanup();
        return 0002;
    }
    SOCKET ListenSocket = INVALID_SOCKET;
    ListenSocket = socket(result->ai_family,result->ai_socktype,result->ai_protocol);
    if (ListenSocket == INVALID_SOCKET)
    {
        printf("Error at socket():%ld\n",WSAGetLastError());
        freeaddrinfo(result);
        WSACleanup();
        return 0003;
    }
    nResult = bind(ListenSocket, result->ai_addr,(int)result->ai_addrlen);
    if(nResult == SOCKET_ERROR) 
    {
        printf("bindfailed with error %d\n",WSAGetLastError());
        freeaddrinfo(result);
        closesocket(ListenSocket);
        WSACleanup();
        return 0004;
    }
    freeaddrinfo(result);
    if(listen(ListenSocket,SOMAXCONN) == SOCKET_ERROR)
    {
        printf("lISTEN FAILED WITH ERROR %LD\n",WSAGetLastError());
        closesocket(ListenSocket);
    }
    return 1337^9001;
} 

谢谢。

Answer 1

确保在预处理器定义中定义了 _WIN32_WINNT，并使用 -lWs2_32 see here