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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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error LNK2019: unresolved external symbol

I think I´ve read about everything concerning this error here at stackoverflow, but I cannot solve my problem: I have the DirectShow PushSource Filter sample project (.dll) which I managed to build in VS2013 and also a test project in another sln…
Richard
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error LNK2019: unresolved external symbol when using SendInput()

I'm writing a C program that uses the SendInput() function to simulate keystrokes. However, I get the following error when compiling: error LNK2019: unresolved external symbol __imp__SendInput@12 referenced in function _main. I am using the…
Santiago Benoit
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LNK 2019 error in static function

I want to have a static function computing the mean of a vector of floats. I take the float function from here. I have a simplemath.h #ifndef SIMPLEMATH_H #define SIMPLEMATH_H class SimpleMath { public: SimpleMath(); static float …
Jan Hackenberg
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LNK1120 error when creating library in Visual Studio

When building a Visual Studio project I get a bunch of errors resulting in "LNK1120: 10 unresolved externals". I'm fairly new to Visual Studio C++ - I've been looking around for answers and can't seem to find any that clear up my errors. The…
Roka545
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Error LNK 2019 unresolved external symbol, funny thing is that is worked last night no error, saved went to bed work up and getting that error

eventually I want to move these functions and class over to a cpp file. But want to make sure the program at least runs. And yes I have checked the previous questions dealing with LNK2019 errors, but to no avail. this is a copy of the error that I…
user5928703
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Linker Error using NetMon API in Visual Studio 2013

I have problems compiling/linking the NetmonAPI in VS 2013. The API comes with installing MS Networkmonitor. Networkmonitor even has a explanation in the help how you can get it to work in VS. I followed the instructions how to set it up, tried an…
kyi
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VC++ Reading linking error output and fixing it - LNK2019

This may or may not be a duplication, but what I've found hasn't helped. So I made a DLL to easily do OOP with SDL2. Almost all the classes work except for one that I just made now and in the test it's not working. The error log from the test…
MPenate
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Affdex SDK camera detector LNk2019

I am trying to use the Affdex SDK to determine the emotions of someone through facial recognition. When on their website it says the first thing to do is to create a CameraDetector. They say to do: CameraDetector detector = new…
Ethan Harte
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LNK2019 unresolved external symbol gStreamer tutorials Visual Studio 2015

After installing gStreamer SDK Installed from here I am now attempting to compile and run the tutorial files that come with it, using Visual studio 2015. Tutorial documentation here Given that these were originally made in VS2010 I had to upgrade…
workdamnit
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Simple program gets LNK2019: unresolved external symbol Visual Studio 2013

I've been struggling with this error on a more complex solution for days, so I simplified a test project to see if I can't figure it out and it still gets the same error: 1>------ Build started: Project: test, Configuration: Debug Win32 ------ 1> …
LMP3D
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What is causing me to get the linker error LNK2019?

I'm trying to write a program to calculate the height of a ball at various points in time, but whenever I try to compile I get error LNK2019. Also, it keeps telling me my doubles get converted to ints but I don't know why. 1>------ Build started:…
Oliver Vakomies
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Why calling member function declared and defined in another file gives link error?

I'm trying to call a public member function: // main.cpp #include "AH.h" int somefunc() { //... // it - object of class A it.set_mean(angle, mean); //... } that declared in .h // AH.h class A { //... public: inline void set_mean(const int…
Il'ya Zhenin
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error LNK2019: unresolved external symbol, cannot not link with the cpp file i coded

I start learning C++ in school and this error appear. 1>Bettle_Dice.obj : error LNK2019: unresolved external symbol "public: int __thiscall Beetle::checkcom(void)" (?checkcom@Beetle@@QAEHXZ) referenced in function _main I have include other header…
Sing
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Linker unresolved external symbols - can't find functions in dll

I am working in Visual Studio C++. I made an class with a non-static function and packaged it as a dll. Here is the code to generate my dll: // head file #ifndef FUNCTIONS_H_ #define FUNCTIONS_H_ #include #include #ifdef…
Yves
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LNK2019: unresolved external symbol public

I'm trying to write my code in Visual Studio 2013 for second time in CodeBlocks, I am getting an error while trying to arrange a Binary Search Tree, here is my code for BinarySearchTree.h #pragma once template class…
Akado2009
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