error LNK2005 error LNK2001工程配置錯誤問題。

阿新 • • 發佈：2019-01-26

(thinkvd開發日誌）編譯正常的工程，加了幾個函式之後，突然出現：

1>------ Build started: Project: ppt_plugin, Configuration: Debug Win32 ------

1>Linking...

1>nafxcwd.lib(dllmodul.obj) : error LNK2005: [email protected] already defined in LIBCMTD.lib(dllmain.obj)

1>nafxcwd.lib(afxmem.obj) : error LNK2005: "void * __cdecl operator new(unsigned int)" (

[email protected]@Z) already defined in LIBCMTD.lib(new.obj)

1>nafxcwd.lib(afxmem.obj) : error LNK2005: "void __cdecl operator delete(void *)" ([email protected]@Z) already defined in LIBCMTD.lib(dbgdel.obj)

1>nafxcwd.lib(afxmem.obj) : error LNK2005: "void __cdecl operator delete[](void *)" (

[email protected]@Z) already defined in LIBCMTD.lib(delete2.obj)

1> Creating library ../bin/plus_ppt.lib and object ../bin/plus_ppt.exp

1>plus_ppt.exp : warning LNK4070: /OUT:ppt_plugin.dll directive in .EXP differs from output filename '../bin/plus_ppt.dll'; ignoring directive

1>../bin/plus_ppt.dll : fatal error LNK1169: one or more multiply defined symbols found

在Link->input->Ignore lib加入nafxcwd.lib，又出現:

>Linking...

1> Creating library ../bin/plus_ppt.lib and object ../bin/plus_ppt.exp

1>plus_ppt.exp : warning LNK4070: /OUT:ppt_plugin.dll directive in .EXP differs from output filename '../bin/plus_ppt.dll'; ignoring directive

1>PPTEventSink.obj : error LNK2001: unresolved external symbol __afxForceEXCLUDE

1>pptPlugin.obj : error LNK2001: unresolved external symbol __afxForceEXCLUDE

1>PPTEventSink.obj : error LNK2001: unresolved external symbol __afxForceUSRDLL

1>pptPlugin.obj : error LNK2001: unresolved external symbol __afxForceUSRDLL

1>pptPlugin.obj : error LNK2019: unresolved external symbol "public: __thiscall COleVariant::~COleVariant(void)" ([email protected]@[email protected]) referenced in function "long __stdcall MsgWndProc(struct HWND__ *,unsigned int,unsigned int,long)" ([email protected]@[email protected]@[email protected])

1>pptPlugin.obj : error LNK2019: unresolved external symbol "public: __thiscall COleVariant::COleVariant(long,unsigned short)" ([email protected]@[email protected]@Z) referenced in function "long __stdcall MsgWndProc(struct HWND__ *,unsigned int,unsigned int,long)" ([email protected]@[email protected]@[email protected])

1>../bin/plus_ppt.dll : fatal error LNK1120: 4 unresolved externals

在release, debug版都出現過，反覆折騰，偶爾也好了，為什麼好了自己也不清楚。查了一下資料，有人說是lib的順序問題

在linker->comman Line 最後加上nafxcwd.lib

小結一下：
1。在Link->input->Ignore lib加入nafxcwd.lib
2。 linker->comman Line 最後加上nafxcwd.lib