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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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LNK2019 LNK2001 errors in visual studio 2017

I am using Visual Studio 2017, and building in x64. I have 2 libraries linked to my solution file, flann, and opencv. I can build the release mode but in debug mode everything is messed up! The problem is with opencv library, and I have double…
Meghdad
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Measure time of functions in other Class

i have read different approaches howto measure the time of functions here at stackflow. I want to be able to call a timemeasure function for all functions of my program and wrote a little helper class : // helper.h class Helper { public: …
biohell
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error LNK2001: unresolved external symbol Visaul C++ SuiteSparse lib

I used Visual C++ 2015. I received the following errors when I tried to build my g2o sample code. Error LNK2001 unresolved external symbol __imp_fflush Error LNK2001 unresolved external symbol __imp_fflush Error LNK2001 unresolved external…
Shengren Huang
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LNK2019: Unresolved External Symbol in OpenCV

I've been trying a few to days to configure the opencv library in Windows 10 and it's being quite a nightmare! This is my code: #include #include #include #include…
Mario
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got LNK2019 and LNK1120 when compiling BST source code

This code is aim to create a binary search tree class. #pragma once #include "Dictionary.h" #include "BSTNode.h" template class BST : public Dictionary { private: BSTNode * root; int…
Chengkun Li
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LNK2019 unresolved external symbol using GLFW

Probably the most asked question on GLFW ever. But I've tried everything I can think of and after 3 hours of googling I give up. What I've been able to understand is that this error occours when: The compiled code for function makes a reference or…
Behar
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LNK2019 unresolved external sumbol (cURL & Jsoncpp)

I have been searching the internet for quite some time to find a solution to my problem and not a single one has worked. So if you can help I will be very thankful! I have compiled the jsoncpp.lib and libcurl.lib and including them in my C++ project…
Persuasion
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Why does LNK2019 error still exists after I did static library in the same way as it was described in msdn?

So I made simple static library LogCon with such code in LogCon.cpp: #include "LogCon.h" namespace LogCon { static bool NOT(bool a) { return !a; } } and LogCon.h: namespace LogCon { class MyLogCon { public: …
Kyoko
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LNK2019 Error when calling methods of a static member in .cpp file

I am getting these errors in my code, they are all related to one static member in my Game class. Game.obj : error LNK2019: unresolved external symbol "public: class std::shared_ptr __thiscall SceneManager::AddScene
Taylor Riccetti
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compile error due to virtual function in dynamic link library

in a MSVC dll project, i tried to create a dll containing a base class //header file class MATHLIBRARY_API Shape { protected: int width, height; public: Shape(int, int); int area(void) { return -1; }; }; it's compiled successfully, but…
benkyou
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Unresolved external symbol(LNK2019) and unresolved externals(LNK 1120)

i am trying to import functions from a self built dll the function in dll is: std::string stringFunc(std::string str) { return str; } in another project I try to call this function, Visual Studio shows error: Error LNK2019 unresolved…
benkyou
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I'm using opencv-3.4.1 and can't use imshow(). thinking there's no lib! how can I solve it?

I'm using opencv-3.4.1 and having problem in using imshow(). Thinking there's no lib! How can I solve it? This is my lib folder enter image description here It has only 'opencv_world341.lib' and I want to use different functions like 'imshow()' This…
정등혁
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LNK2019 error on function call

Trying to solve a LNK2019 error I made a small code to make this error again outside of my project. The error does not appear at the same place but seam to be similar. I am using Visual Studio 2013 and I did not try with an other IDE. my program…
Ystalio Di Staniovich
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visual studio 2017 LNK2019: unresolved external symbol In GoogleTestGoogleMock Project

I am a noobie with C++. My first learning project uses GoogleTest and GoolgleMock, but, of course, I am new to those also. I installed googletestmock.v.141 v101 via NuGet. My main app, AstronomyCalculations, builds and runs without a problem. My…
TooStupidForStackOverflow
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QT Creator | Error LNK2019 | Opencv in QT

I integrated opencv in QT creator. I want to use my camera and display the frames in the mainwindow. After compiling a simple code, where I only want to output a simple message, I get an error (German language) Like: videocap.obj:-1: Fehler:…
Burkay
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