Visual C ++ LNK2005，LNK2019中的鏈接器錯誤-不知道為什么

Question

我正在嘗試從nVidia 9.5 SDK構建代碼，但是出現以下鏈接器錯誤：

>1>NV_D3DCommonDX9U.lib(NV_StringFuncs.obj) : error LNK2005: "class std::basic_istream<char,struct std::char_traits<char> > & __cdecl std::getline<char,struct std::char_traits<char>,class std::allocator<char> >(class std::basic_istream<char,struct std::char_traits<char> > &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > &)" (??$getline@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@YAAAV?$basic_istream@DU?$char_traits@D@std@@@0@AAV10@AAV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@0@@Z) already defined in msvcprtd.lib(MSVCP90D.dll)
1>FogTombScene.obj : error LNK2019: unresolved external symbol "public: struct IDirect3DTexture9 * * __thiscall TextureFactory::CreateTextureFromFile(struct IDirect3DDevice9 *,wchar_t const *,bool)" (?CreateTextureFromFile@TextureFactory@@QAEPAPAUIDirect3DTexture9@@PAUIDirect3DDevice9@@PB_W_N@Z) referenced in function "public: virtual long __thiscall FogTombScene::RestoreDeviceObjects(void)" (?RestoreDeviceObjects@FogTombScene@@UAEJXZ)
1>FogTombScene.obj : error LNK2019: unresolved external symbol "public: long __thiscall LoadXFile::LoadFile(wchar_t const *,bool)" (?LoadFile@LoadXFile@@QAEJPB_W_N@Z) referenced in function "public: virtual long __thiscall FogTombScene::RestoreDeviceObjects(void)" (?RestoreDeviceObjects@FogTombScene@@UAEJXZ)
1>FogTombScene.obj : error LNK2019: unresolved external symbol "public: long __thiscall LoadXFile::Initialize(struct IDirect3DDevice9 *,class std::basic_string<wchar_t,struct std::char_traits<wchar_t>,class std::allocator<wchar_t> > (__cdecl*)(class std::basic_string<wchar_t,struct std::char_traits<wchar_t>,class std::allocator<wchar_t> > const &,bool),class TextureFactory * *)" (?Initialize@LoadXFile@@QAEJPAUIDirect3DDevice9@@P6A?AV?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@ABV34@_N@ZPAPAVTextureFactory@@@Z) referenced in function "public: virtual long __thiscall FogTombScene::RestoreDeviceObjects(void)" (?RestoreDeviceObjects@FogTombScene@@UAEJXZ)
1>NV_D3DCommonDX9U.lib(NV_StringFuncs.obj) : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __thiscall std::locale::facet::_Register(void)" (__imp_?_Register@facet@locale@std@@QAEXXZ) referenced in function "class std::ctype<char> const & __cdecl std::use_facet<class std::ctype<char> >(class std::locale const &)" (??$use_facet@V?$ctype@D@std@@@std@@YAABV?$ctype@D@0@ABVlocale@0@@Z)
1>NV_D3DCommonDX9U.lib(NV_StringFuncs.obj) : error LNK2019: unresolved external symbol "__declspec(dllimport) public: static unsigned int __cdecl std::ctype<char>::_Getcat(class std::locale::facet const * *)" (__imp_?_Getcat@?$ctype@D@std@@SAIPAPBVfacet@locale@2@@Z) referenced in function "class std::ctype<char> const & __cdecl std::use_facet<class std::ctype<char> >(class std::locale const &)" (??$use_facet@V?$ctype@D@std@@@std@@YAABV?$ctype@D@0@ABVlocale@0@@Z)
1>NV_D3DCommonDX9U.lib(NV_StringFuncs.obj) : error LNK2019: unresolved external symbol "__declspec(dllimport) public: static unsigned int __cdecl std::ctype<unsigned short>::_Getcat(class std::locale::facet const * *)" (__imp_?_Getcat@?$ctype@G@std@@SAIPAPBVfacet@locale@2@@Z) referenced in function "class std::ctype<unsigned short> const & __cdecl std::use_facet<class std::ctype<unsigned short> >(class std::locale const &)" (??$use_facet@V?$ctype@G@std@@@std@@YAABV?$ctype@G@0@ABVlocale@0@@Z)

我不知道為什么會引起這些恐怖，因為我99％確信我已經正確設置了目錄。

例如，它找不到的功能之一是TextureFactory :: CreateTextureFromFile，但我已經在其中聲明和定義了該功能的目錄已經添加到Visual C ++設置的include / source目錄中。

文件頂部看起來像這樣：

#include "nvafx.h"
//#include "NV_D3DCommon\NV_D3DCommonDX9.h"  // include library sub-headers
                                             // and add .lib to linker inputs
//#include "NV_D3DMesh\NV_D3DMesh.h"

//#include "shared\NV_Common.h"
//#include "shared\NV_Error.h"

#include "FogTombScene.h"
#include "ThicknessRenderProperties.h"
#include "ThicknessRenderProperties8BPC.h"
#include "../camera.h"


// When the following two lines are added I get more LNK2005 (understandable) 
// but I also still get the same LNK2019 errors as above
#include "texturefactory.h"
#include "texturefactory.cpp"

更重要的是，如果我在出現這些錯誤的文件的頂部說#include“ TextureFactory.h”和#include“ texturefactory.cpp”，那么就沒有歧義的余地，定義了這些函數並基本上復制+粘貼到生成鏈接器錯誤的同一源文件中，但我仍然收到鏈接器錯誤。

我在俯視什么嗎？

Answer 1

發生這種情況是因為：

1缺少tomzx或Daniel之類的.lib源，或者2在Visual C的另一個版本中編譯的.lib嘗試在記事本中創建文件，例如.c（而不是.cpp），然后添加到您的項目文件.c（項目...添加到項目...文件）

對不起，我是墨西哥人，我不會說英語。 禮炮。

Answer 2

您已將文件添加到include / source文件夾中，但是庫又如何呢？ 在我看來，這更像是一個圖書館問題（缺少.lib）。

也許您還需要在“鏈接器-輸入”中列出您的依賴項。

LNK2005通常意味着附加庫未正確鏈接。

Answer 3

您可能忘記了鏈接到SDK的一個lib文件。 您可以在Linker-> Input-> Additional Dependencies下的項目屬性中進行設置，或使用#pragma注釋 。