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Questions tagged [lnk2019]

LNK2019 is a common MSVC linker error indicating that the linker was unable to find a required external symbol in any compilation unit. Check the SO post on common errors and their resolution.

LNK2019 is a common MSVC linker error indicating that the linker was unable to find a required external symbol in any compilation unit. A possible and common cause of the error is a symbol that is declared but never defined.

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Qt, Library function calling gives unresolved external symbol error

I'm having troubles with using of external library, lets start from beginning. I have some library trans2quik, wich consists of 3 files: trans2quik .dll/.lib/.h So, I use Qt5.2, MSVC 2012 x64, win7. I create simple qt widget application, and link…
user3074856
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C++ Calling Virtual Method in Constructor

I use a parent class which has some virtual methods. When I call the virtual method in the constructor, it gives LNK2019 and LNK1120 errors with "error LNK2019: unresolved external symbol "protected: virtual int ... referenced in function "public:…
ciyo
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Error LNK2019 unresolved external symbol when using osg-Headers in MSVS2012

I'm trying to compile a example program for learning to work with osg, but the way to success seems hard as always. Here is the code: #include #include #include int main() { osgViewer::Viewer…
thunder09
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C++/Qt: Just a LNK2019 and I don't know why

I have one of this unpopular LNK2019-errors in my project. Perhaps anyone can help me? That's my header file: #ifndef ELIST_H #define ELIST_H #include class EList : public QTableWidget{ Q_OBJECT public: explicit…
salted
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C++ Unresolved External Symbol using Template Linked Lists and Pass by Pointer

Please read the comments below Here is the specific error: Error 2 error LNK2019: unresolved external symbol "void __cdecl totalPolynomial(class LinkedList *,class LinkedList *,class LinkedList *)"…
Angel
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Linker Issues with QString?

I'm having trouble compiling a qt project using msvc2012. For some reason, it says that there is an unresolved symbol that equates to a QString function, which I can't understand. Here's my .pro file ( this program is commandline only, only using…
rahul.bhatia.k
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C++ error LNK2019: unresolved external symbol in multi-header class

all I bet this is a frequently asked question. But each time it is raised with a different context. Here is my problem: I have a project in VS2012 Express. The project include few header files. It is meaningless to paste the whole project here, thus…
ChangeMyName
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LNK2019 error while using IBPP in Firebreath project

So here's my problem. I'm writing web browser plugin in Firebreath. Plugin has to connect to different databases (Firebird, MS SQL, My SQL etc.) depending on client request. So I'm creating class to manage connection to right DB. To connect to…
Michał
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qt creator error: LNK 2019: unresolved external symbol “__declspec(dllimport) public: void__thiscall

I would like to know why I am getting these errors.I am using Qt 5.0.2 and msvc2010 compiler. It runs normally when i delete the blah function. I'm not an expert programmer at all, please answer me as if i dont know anything, thank…
throwaway2013
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error LNK2019: unresolved external symbol referenced in function _main visual c++

Does anyone have any ideas on how to fix this? I've looked online and changed settings on my visual C++, but it still doesn't work. class store { public: int MainMenu(); store(); private: int main; }; class customer:store { public: …
Tiffany
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LNK2019: unresolved external symbol _main referenced in function ___tmainCRTStartup error when using WinMain

I've been following this tutorial to learn some DirectX programming: http://www.rastertek.com/dx11tut02.html I'd gotten to the end, tried to build and it threw this error when I compiled: MSVCRTD.lib(crtexe.obj) : error LNK2019: unresolved external…
Ryan Butt
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Linking APR (Apache Portable Runtime) with CMake in Windows

i would like to compile a project using the apache portable runtime libraries (APR) and cmake. It all looks good when running along with linux (as there i can use the apr-1-config shell script). Nevertheless, in windows it looks like cmake does not…
Steve
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Can't link GLFW C++; Added the .dll, .h, .lib, but still getting LNK2019

I've added the .dll to Windows/System32, the .lib to VS/lib, and the .h to the VS/include. All that would be left is linking it through the project. This is what I have: #include int main(void) { /* Initialize the library */ if…
Danny Simons
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LNK 2019 unresolved symbol - FFmpeg

I'm trying to use FFmpeg to open and read a video .avi I work on win7 x64 with Visual Studio 2010 For now my code is very simple: #include "libavcodec/avcodec.h" #include "libavformat/avformat.h" #include "SDL.h" #include "SDL_mixer.h" int main…
Cristina1986
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LNK 2019 / 1120 Errors with my header / source file practice with Double Linked Lists

Could you help me figure out why I'm getting these 2019 Errors? I'm pretty sure all the files are saved in the correct places, and I think I'm using the correct conventions for header files? This is a lab for my systems programming class. Here are…
josh
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