Question

我正在将我在Borland写的一个voip应用程序移植到Mingw，所以我知道代码可以工作。我使用命令行gcc -lws2_32 -mwindows voipapp.c -o voipapp并继续收到错误消息

未定义引用'WSAAsyncSelect @ 16'“。

它似乎正确定位libws2_32.a，因为没有错误消息告诉我。什么可能是错的任何想法？我安装了mingw的最新版本之一。谢谢！

我的代码如下：

#include <windows.h>
#include <winsock2.h>
#define __MT__
#include <mmreg.h>
#include <time.h>
#include <math.h>
#include <stdio.h>
#include <process.h>

#define WM_SOCKETREAD (WM_USER + 1)

SOCKET ListenSocket;

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
           LPSTR szCmdLine, int iCmdShow) {

    static char szAppName[] = "voip";
    HWND        hwnd;
    MSG         msg;
    WNDCLASSEX  wndclass;

    wndclass.cbSize         = sizeof(wndclass);
    wndclass.style          = CS_HREDRAW | CS_VREDRAW;
    wndclass.lpfnWndProc    = WndProc;
    wndclass.cbClsExtra     = 0;
    wndclass.cbWndExtra     = 0;
    wndclass.hInstance      = hInstance;
    wndclass.hIcon          = LoadIcon(NULL, IDI_APPLICATION);
    wndclass.hIconSm        = LoadIcon(NULL, IDI_APPLICATION);
    wndclass.hCursor        = LoadCursor(NULL, IDC_ARROW);
    wndclass.hbrBackground  = (HBRUSH) GetStockObject(WHITE_BRUSH);
    wndclass.lpszClassName  = szAppName;
    wndclass.lpszMenuName   = NULL;

    RegisterClassEx(&wndclass);

    hwnd = CreateWindow(szAppName, "VOIP prototype",
            WS_OVERLAPPEDWINDOW,
            CW_USEDEFAULT, CW_USEDEFAULT,
            CW_USEDEFAULT, CW_USEDEFAULT,
            NULL, NULL, hInstance, NULL);

    ShowWindow(hwnd, iCmdShow);
    UpdateWindow(hwnd);


    WSAAsyncSelect(ListenSocket, hwnd, WM_SOCKETREAD, FD_READ|FD_CLOSE);


    while ( GetMessage(&msg, NULL, 0, 0) ) {
    TranslateMessage(&msg);
    DispatchMessage(&msg); 
        } 

    return msg.wParam;
}

LRESULT CALLBACK WndProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam) {

    return DefWindowProc(hwnd, iMsg, wParam, lParam);
}

Answer 1

您必须指定正确的链接顺序。

尝试：

gcc voipapp.c -o voipapp -mwindows -lws2_32

将WSAAsyncSelect与Mingw链接 - 未定义的引用

1 个答案: