Error Lnk2019 Unresolved External Symbol Dllimport
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Error Lnk2019 Unresolved External Symbol __declspec(dllimport)
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about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack error lnk2019 unresolved external symbol winmain@16 referenced in function ___tmaincrtstartup Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up unresolved external symbol for __declspec(dllimport) when using dll to export class up vote 8 down vote favorite I want to define a derived class based on a dll error lnk2019 unresolved external symbol visual studio 2010 exported class. The base class is defined in Project A, and the derived class is in Project B. Firstly, in Project A, preprocessor MYDLL_BUILD is defined. And I use a header file to specify export/import: #if !defined(MYDLL_BUILD) # pragma comment(lib, "myDll.lib") #endif #if defined(MYDLL_BUILD) # define MYDLL_API __declspec(dllexport) #else # define MYDLL_API __declspec(dllimport) #endif Then I define the base class: class MYDLL_API DllObject { public: virtual ~DllObject() {} protected: DllObject() { m_count = 3; } private: int m_count; }; In Project B, the preprocessor MYDLL_BUILD is not defined. Here is the derived class: class MyClass : public DllObject { public: ~MyClass(){} MyClass() { m_data = 20; } private: int m_data; }; I have included the dll and lib file, but still I get the unresolved external symbol error: 2>Test_Entry.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: virtual __thiscall ADAI::DllObject::~DllObject(void)" (__imp_??1DllObject@ADAI@@UAE@XZ) referenced in function "public: virtual __thiscall MyClass::~MyClass(void)" (??1MyClass@@UAE@XZ) 2>Test_Entry.obj : error LNK201
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Error Lnk2019 Unresolved External Symbol Public __thiscall Referenced In Function _main
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Error Lnk2019 Unresolved External Symbol Main Referenced In Function __tmaincrtstartup
with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, http://stackoverflow.com/questions/9747207/unresolved-external-symbol-for-declspecdllimport-when-using-dll-to-export-cl just like you, helping each other. Join them; it only takes a minute: Sign up Unresolved external symbol _declspec(dllimport) up vote 0 down vote favorite I've created an DLL for my Console Application in Visual Studio. In my DLL I have a Class named Dialog_MainMenu with has a *.cpp file and a *.h file. Following http://stackoverflow.com/questions/17901973/unresolved-external-symbol-declspecdllimport error message: Error 9 error LNK2001: unresolved external symbol "__declspec(dllimport) public: static enum Dialog_MainMenu::GAME_STATES Dialog_MainMenu::CurrentGameState" (_imp?CurrentGameState@Dialog_MainMenu@@2W4GAME_STATES@1@A) C:\Users\Kevin\Desktop\c++ projects\development_testing\The Intense Adventure\Dialogs\Dialog_MainMenu.obj Dialogs Which I kinda don't understand. This only occured when I added an enum to my prototype in my header file. Header file: #ifdef DIALOG_MAINMENU_EXPORTS #define DIALOG_MAINMENU_API __declspec(dllexport) #else #define DIALOG_MAINMENU_API __declspec(dllimport) #endif class Dialog_MainMenu { public: static DIALOG_MAINMENU_API enum GAME_STATES { MAINMENU, GAME, OPTIONS, CREDITS, QUIT }; static DIALOG_MAINMENU_API GAME_STATES CurrentGameState; DIALOG_MAINMENU_API GAME_STATES GetState(); }; (Don't know if issue lies here, so I'll just add it) cpp file in general: //Get state Dialog_MainMenu::GAME_STATES Dialog_MainMenu::GetState() { // Code.. } //Switching state Dialog_MainMenu::CurrentGameState = Dialog_MainMenu::GAME_STATES::GAME; I would really appreciate, any help or atleast some advice, where I can learn more about this problem. c++ dll enums console-application dllimport share|improve this question asked Jul 27 '13 at 20:04 Kevin Jensen Petersen 93625 did you reference the .lib file ? –Yochai Timmer Jul 27 '13 at 20:07 I sure did. I even triple ch
Support Answers MathWorks Search MathWorks.com MathWorks Answers Support MATLAB Answers™ MATLAB Central Community https://www.mathworks.com/matlabcentral/answers/98211-why-do-i-receive-link-errors-lnk2019-when-compiling-in-microsoft-visual-c-2005 Home MATLAB Answers File Exchange Cody Blogs Newsreader Link http://www.cplusplus.com/forum/general/12144/ Exchange ThingSpeak Anniversary Home Ask Answer Browse More Contributors Recent Activity Flagged Content Flagged as Spam Help MATLAB Central Community Home MATLAB Answers File Exchange Cody Blogs Newsreader Link Exchange ThingSpeak Anniversary Home Ask Answer Browse More Contributors error lnk2019 Recent Activity Flagged Content Flagged as Spam Help Trial software MathWorks Support Team (view profile) 13,595 questions 13,595 answers 13,594 accepted answers Reputation: 2,578 Vote0 Why do I receive link errors (LNK2019) when compiling in Microsoft Visual C++ 2005? Asked by MathWorks Support Team MathWorks Support Team (view error lnk2019 unresolved profile) 13,595 questions 13,595 answers 13,594 accepted answers Reputation: 2,578 on 27 Jun 2009 Latest activity Commented on by Madhura Suresh Madhura Suresh (view profile) 0 questions 59 answers 5 accepted answers Reputation: 34 on 12 Feb 2015 Accepted Answer by MathWorks Support Team MathWorks Support Team (view profile) 13,595 questions 13,595 answers 13,594 accepted answers Reputation: 2,578 889 views (last 30 days) 889 views (last 30 days) I use MATLAB Compiler to build a C++ shared library "libmatrixp.dll". When I build the driver "matrixdriver.cpp" in Microsoft Visual C++ 2005, after properly setting the link and include paths, I receive link errors: 1>------ Build started: Project: matrixtest, Configuration: Debug Win32------ 1>Compiling... 1>matrixdriver.cpp 1>Compiling manifest to resources... 1>Linking... 1>matrixdriver.obj : error LNK2019: unresolved external symbol _mclTerminateApplication referenced in function __catch$?run_main@@YAPAXPAX@Z$0 1>matrixdriver.obj : error LNK2019: unresolved external symbol _libmatrixpTerminate referenced in function __catch$?run_m
VisiBroker 8. As you can see below, the compilation process was successfully executed, but linking failed. If there's anybody out there who can give me a tip, i'd certainly appreciate it. ------ Build started: Project: C++CorbaWrapper, Configuration: Debug Win32 ------ Compiling... MicrocontrollerFactoryImpl.cpp MicrocontrollerImpl.cpp MicrocontrollerManager_s.cpp Server.cpp Generating Code... Linking... MicrocontrollerFactoryImpl.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: virtual __thiscall PortableServer_ServantBase::~PortableServer_ServantBase(void)" (__imp_??1PortableServer_ServantBase@@UAE@XZ) referenced in function __unwindfunclet$??0MicrocontrollerFactoryImpl@@QAE@XZ$0 MicrocontrollerImpl.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: virtual __thiscall PortableServer_ServantBase::~PortableServer_ServantBase(void)" (__imp_??1PortableServer_ServantBase@@UAE@XZ) MicrocontrollerManager_s.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: virtual __thiscall PortableServer_ServantBase::~PortableServer_ServantBase(void)" (__imp_??1PortableServer_ServantBase@@UAE@XZ) Server.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: virtual __thiscall PortableServer_ServantBase::~PortableServer_ServantBase(void)" (__imp_??1PortableServer_ServantBase@@UAE@XZ) Last edited on Jun 29, 2009 at 11:46pm UTC Jun 24, 2009 at 7:35pm UTC helios (13227) Are you linking to the .lib? Jun 24, 2009 at 11:39pm UTC ccimuam (7) Hi helios, Thanks for your quick response! I'm not sure i do understand what u mean by linking to the .lib. I'm honestly not an experienced C++ and VC++ 2008 programmer. I'm new to these technologies. But after googling for a while and trying hard to understand the error message i think the Linker is unable to access certain libraries. Which Libraries???