MFC 静态链接未解析的外部符号

Posted 2023-02-22

【中文标题】MFC 静态链接未解析的外部符号

【英文标题】：MFC Static Linking Unresolved External Symbol

【发布时间】：2013-12-20 00:38:51

【问题描述】：

我正在尝试使用 Use of MFC:Use MFC in a Static Library 构建自定义版本的 GyazoWin，这会导致大量参考错误。

如何安抚 Visual Studio，以便我可以使用静态链接库进行构建？

更新

我设法将 user32 添加到链接库中（我认为），现在我的错误数量只有 1/3。谁能告诉我现在缺少什么库？

Error   2   error LNK2019: unresolved external symbol __imp__BitBlt@36 referenced in function "long __stdcall WndProc(struct HWND__ *,unsigned int,unsigned int,long)" (?WndProc@@YGJPAUHWND__@@IIJ@Z)  S:\Software\Microsoft\Visual Studio\Projects\Completed (New)\gyazowin\gyazowin\gyazowin.obj gyazowin
Error   3   error LNK2019: unresolved external symbol __imp__CreateCompatibleBitmap@12 referenced in function "long __stdcall WndProc(struct HWND__ *,unsigned int,unsigned int,long)" (?WndProc@@YGJPAUHWND__@@IIJ@Z)  S:\Software\Microsoft\Visual Studio\Projects\Completed (New)\gyazowin\gyazowin\gyazowin.obj gyazowin
Error   4   error LNK2019: unresolved external symbol __imp__CreateCompatibleDC@4 referenced in function "long __stdcall WndProc(struct HWND__ *,unsigned int,unsigned int,long)" (?WndProc@@YGJPAUHWND__@@IIJ@Z)   S:\Software\Microsoft\Visual Studio\Projects\Completed (New)\gyazowin\gyazowin\gyazowin.obj gyazowin
Error   5   error LNK2019: unresolved external symbol __imp__CreateFontW@56 referenced in function "long __stdcall LayerWndProc(struct HWND__ *,unsigned int,unsigned int,long)" (?LayerWndProc@@YGJPAUHWND__@@IIJ@Z)   S:\Software\Microsoft\Visual Studio\Projects\Completed (New)\gyazowin\gyazowin\gyazowin.obj gyazowin
Error   6   error LNK2019: unresolved external symbol __imp__CreatePen@12 referenced in function "long __stdcall LayerWndProc(struct HWND__ *,unsigned int,unsigned int,long)" (?LayerWndProc@@YGJPAUHWND__@@IIJ@Z) S:\Software\Microsoft\Visual Studio\Projects\Completed (New)\gyazowin\gyazowin\gyazowin.obj gyazowin
Error   7   error LNK2019: unresolved external symbol __imp__CreateSolidBrush@4 referenced in function "long __stdcall LayerWndProc(struct HWND__ *,unsigned int,unsigned int,long)" (?LayerWndProc@@YGJPAUHWND__@@IIJ@Z)   S:\Software\Microsoft\Visual Studio\Projects\Completed (New)\gyazowin\gyazowin\gyazowin.obj gyazowin
Error   8   error LNK2019: unresolved external symbol __imp__DeleteDC@4 referenced in function "long __stdcall WndProc(struct HWND__ *,unsigned int,unsigned int,long)" (?WndProc@@YGJPAUHWND__@@IIJ@Z) S:\Software\Microsoft\Visual Studio\Projects\Completed (New)\gyazowin\gyazowin\gyazowin.obj gyazowin
Error   9   error LNK2019: unresolved external symbol __imp__DeleteObject@4 referenced in function "long __stdcall LayerWndProc(struct HWND__ *,unsigned int,unsigned int,long)" (?LayerWndProc@@YGJPAUHWND__@@IIJ@Z)   S:\Software\Microsoft\Visual Studio\Projects\Completed (New)\gyazowin\gyazowin\gyazowin.obj gyazowin
Error   10  error LNK2019: unresolved external symbol __imp__GetDeviceCaps@8 referenced in function "long __stdcall LayerWndProc(struct HWND__ *,unsigned int,unsigned int,long)" (?LayerWndProc@@YGJPAUHWND__@@IIJ@Z)  S:\Software\Microsoft\Visual Studio\Projects\Completed (New)\gyazowin\gyazowin\gyazowin.obj gyazowin
Error   11  error LNK2019: unresolved external symbol __imp__GetStockObject@4 referenced in function "unsigned short __cdecl MyRegisterClass(struct HINSTANCE__ *)" (?MyRegisterClass@@YAGPAUHINSTANCE__@@@Z)   S:\Software\Microsoft\Visual Studio\Projects\Completed (New)\gyazowin\gyazowin\gyazowin.obj gyazowin
Error   12  error LNK2019: unresolved external symbol __imp__Rectangle@20 referenced in function "long __stdcall LayerWndProc(struct HWND__ *,unsigned int,unsigned int,long)" (?LayerWndProc@@YGJPAUHWND__@@IIJ@Z) S:\Software\Microsoft\Visual Studio\Projects\Completed (New)\gyazowin\gyazowin\gyazowin.obj gyazowin
Error   13  error LNK2019: unresolved external symbol __imp__SelectObject@8 referenced in function "long __stdcall LayerWndProc(struct HWND__ *,unsigned int,unsigned int,long)" (?LayerWndProc@@YGJPAUHWND__@@IIJ@Z)   S:\Software\Microsoft\Visual Studio\Projects\Completed (New)\gyazowin\gyazowin\gyazowin.obj gyazowin
Error   14  error LNK2019: unresolved external symbol __imp__SetBkMode@8 referenced in function "long __stdcall LayerWndProc(struct HWND__ *,unsigned int,unsigned int,long)" (?LayerWndProc@@YGJPAUHWND__@@IIJ@Z)  S:\Software\Microsoft\Visual Studio\Projects\Completed (New)\gyazowin\gyazowin\gyazowin.obj gyazowin
Error   15  error LNK2019: unresolved external symbol __imp__SetTextColor@8 referenced in function "long __stdcall LayerWndProc(struct HWND__ *,unsigned int,unsigned int,long)" (?LayerWndProc@@YGJPAUHWND__@@IIJ@Z)   S:\Software\Microsoft\Visual Studio\Projects\Completed (New)\gyazowin\gyazowin\gyazowin.obj gyazowin
Error   16  error LNK2019: unresolved external symbol __imp__TextOutW@20 referenced in function "long __stdcall LayerWndProc(struct HWND__ *,unsigned int,unsigned int,long)" (?LayerWndProc@@YGJPAUHWND__@@IIJ@Z)  S:\Software\Microsoft\Visual Studio\Projects\Completed (New)\gyazowin\gyazowin\gyazowin.obj gyazowin
Error   17  error LNK2019: unresolved external symbol __imp__ShellExecuteExW@4 referenced in function "void __cdecl execUrl(char const *)" (?execUrl@@YAXPBD@Z) S:\Software\Microsoft\Visual Studio\Projects\Completed (New)\gyazowin\gyazowin\gyazowin.obj gyazowin
Error   18  error LNK2019: unresolved external symbol __imp__SHGetSpecialFolderPathW@16 referenced in function "class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __cdecl getId(void)" (?getId@@YA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) S:\Software\Microsoft\Visual Studio\Projects\Completed (New)\gyazowin\gyazowin\gyazowin.obj gyazowin
Error   19  error LNK1120: 17 unresolved externals  S:\Software\Microsoft\Visual Studio\Projects\Completed (New)\gyazowin\Debug\gyazowin.exe    gyazowin

【问题讨论】：

这看起来很可疑，好像 user32.lib 和 shell32.lib 不在您的链接行中。

我用的C++不多，怎么添加文件？如果它解决了我的问题，那么它就是一个答案。

你需要 gdi32.lib

【参考方案1】：

对于来自平台库的功能：

使用您喜欢的搜索引擎搜索函数的名称（例如“GetStockObject”）。

在 MSDN 上查找该函数的文档（例如 GetStockObject）。它通常是最好的结果之一。

在文档中的“要求”下，找到“库”条目。那是您必须链接到的库才能使用该函数（对于GetStockObject，它是 gdi32.lib）。

重复直到解决所有错误。

【讨论】：

在我的情况下，我需要 accept 不包括 winsock2 - 在文件中使用 #pragma comment(lib, "Ws2_32.lib")