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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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558 questions
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LNK2019 problems when trying to get custom window frame in Qt

I want a custom window frame for an app I've made in Qt 5.4 with QML.Before implementing it on my main project, I tried the following on a default application: int main(int argc, char *argv[]) { QApplication app(argc, argv); …
Amol Borkar
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In VS2010 ,VC++ error LNK 2019 with CoolProp 5.0.0

I am an amateur VC++ developer. I want to use CoolProp (http://www.coolprop.org/) in my academic VC++ project as a static library in a win 32 app using a VS2010 Ultimate running in x64 laptop machine. So i have downloaded , 1.CoolProp.lib from…
Selva
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"error LNK2019: unresolved external symbol" error in Visual Studio 2010

I'm trying to compile and run a C code that is using libsndfile library for sound files processing. I have added the header file using this path: project's Properties (in C/C++ -> General -> Additional Include Directories) Also i have linked the…
user3127389
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unresolved external Symbol (Constructor)

At building I get the following error: main.obj : error LNK2019: unresolved external symbol ""public: __cdecl Worker::Worker(void)" (??0Worker@@QEAA@XZ)" in function "main". main.obj : error LNK2019: unresolved external symbol ""public: virtual…
nidomiro
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LNK2019 / LNK2001 errors: Why would a library provide a .cpp file with unimplemented functions? (How do they get implemented?)

I think I understand the gist of LNK2019 errors from reading SO and this MSDN article. I have one Why question and one How question (both asked in the title already). Why would a library provide a .cpp file with unimplemented functions? I'm guessing…
Andrew Cheong
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LNK2019 with pure virtual assignment(=) operator in multilevel class hierarchy?

Ok, maybe i'm too fatigued to think about the solution to this problem, I looked a lot about a similar problem on the internet but didn't find one. So here's my terrible code: class X { public: virtual const X& operator =( const X& ) =…
Rampal Chaudhary
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LNK2019 for inline function in static library

I'm trying to use an inline function from a static lib, but I get error LNK2019: unresolved external symbol _ippsExp_64f@12 referenced in function "double __cdecl IppExp(double const &)" (?IppExp@@YANABN@Z) Here's my code: IppWrapper.h (project…
alex555
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ERROR LNK2019:unresolved external symbol, c++

I have written a template class, for a map/dictionary data structure, and keep getting this strange error (ERROR LNK2019:unresolved external symbol) Code: AssArray.h: #pragma once template class AssArray { int…
Nattfrosten
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error LNK2019: unresolved external symbol _luaJIT_setmode

I have this piece of code (file luascript.cpp): bool LuaInterface::initState() { m_luaState = luaL_newstate(); if(!m_luaState) return false; luaL_openlibs(m_luaState); #ifdef __LUAJIT__ luaJIT_setmode(m_luaState, 0,…
Guilherme Garcia
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Cannot solve unresolved external error LNK2019 error

I'm trying to create an object of class A. Compilation works fine, but the linker complains about a LNK2019 unresolved external symbol D::D referenced in function A::A. A.cpp #include "../A.hpp" using namespace ; A::A(D* low, D* mid, D*…
Marijn
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PDB file missing when trying to run Firebase on a Flutter project [LNK4099, LNK2019, LNK2001]

PDB files not found when trying to run Firebase on a Flutter project. I'm trying to run a Flutter app on VS Code. I set up Firebase, added a google-services.json file to my root folder and I've installed the following dependencies:cloud_firestore,…
Ielin Daisy Devashania
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LNK2019: unresolved extrenal symbol when using std::ifstream

I have a problem with using std::ifstream in c++. I'm using Visual Studio 2019. Every time I want to initialize the std::ifstream object it gives me these errors: file: Shader.obj LNK2019 unresolved external symbol __imp___invalid_parameter…
Theobaldus
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Unresolved external symbol error using uint16_t c++

endianness.cpp #include "endianness.h" #include using namespace io; void switch_endianness(uint16_t* n) { *n = (*n >> 8) | (*n << 8); } void switch_endianness(uint32_t* n) { ... } void switch_endianness(uint64_t* n) …
Zimbabaluba
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LNK2019 DirectX unresolved external symbol; file dxerr.lib

Got a LINK2019 error that I can't figure out. Error code: Severity Code Description Project File Line Suppression State Error LNK2019 unresolved external symbol __vsnprintf referenced in function "long __stdcall StringVPrintfWorkerA(char…
K.J. Shamberger
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Getting dynamic atexit destructor link error with custom toolset - eh vector destructor

I'm getting a weird linker error when trying to compile against a VS2005 CRT with a Visual Studio 2015 toolset. The same code compiles perfect on any other toolset version (2005,2010,2012,2013). The code must compile under VS2005 CRT to properly…
Yochai Timmer
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