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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 when trying to use MRPT libraries as external dependency in VS2019 solution

I am implementing a SLAM-algorithm in Visual Studio 2019 where I want to use the ICP algorithm from the MRPT library for scan-matching. I installed the MRPT library as 32-bit from source code using CMake. Problem is the error I'm receiving when…
mullinsen
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Linker error when using OutputIterator in a static library

I tried to search for similar problems but didn't find a thread which could help me solve my problem. Sorry in advance if I missed it! I am pretty new to C++ even if I have experience with other languages such as Java and I am using Visual Studio…
Pino90
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MSVC2019 Missing symbol names from static library

I'm newbe with C++ please help me if someone can! I've made a binary bigint object which work well. I complied it to a static library and tried to include into an another program but it fails with errors like this: combinations.obj||error LNK2019:…
froli78
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Error in VS2017 - LNK2019 unresolved external symbol

I have following C/C++ project in VS2017: MySolution MyProject AClass.h,AClass.cpp protected foo(){...}; BClass.h,BClass.cpp ..... x64\Debug AClass.obj BClass.obj MyProject.lib MyProject.dll MyProjectTest AClassTest.cpp This is…
Ryo
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LNK2019 error when linking CPP file for tests

I am trying to write a Cubic class that performs operations on polynomials of degree 3. When attempting to overload the + operator to return a new Cubic object, it gives me a LNK2019 error: "unresolved external symbol "public: __thiscall…
Flik
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Linker errors with opengl

I am writing code in opengl using C++ in Visual Studio. I have done all the include directories correctly (including glfw include and glfw libraries in the properties), and lib directories correctly but I am getting this error 1.Severity Code …
vivek
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Error LNK2019: Unresolved External Symbol with LevelDB

I'm trying to use LevelDB with C++, so I put all the headers from the include directory in my project like this: I use this code, but the compiler returns 3 LNK2019 errors: So I tried to add the .lib file in the link editor, but I'm still getting…
MH Discord
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error LNK2019: unresolved external symbol cos referenced in function

I have been experiencing this issue for a while and I have not figured it out. I am not a programmer, I am an engineer that knows a little about coding so please be gentle. I am writing custom functions for MathCAD Prime and have used the examples…
amorenojr
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Visual Studio 2015: C++ separate class declaration and implementation

The last version of C++ IDE I was using is VC98, so a lot of things have changed and I'm confused. I'm trying to create a class MyParser. I have its header file MyParser.h in Header Files in the solution explorer, and the source file MyParser.cpp in…
ChangeMyName
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Getting Linking errors using BLuetoothAPIs.h in vs 2017 and windows 10

Using the following code: // Bluetooth_test.cpp : Defines the entry point for the console application. // #include "stdafx.h" #include #include "bthdef.h" #include "BluetoothAPIs.h" int main() { BLUETOOTH_DEVICE_SEARCH_PARAMS…
Ian.V
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Writing C++ code for R in Visual Studio 2015, linker errors

I am trying to get started with developing a DLL with C++ functions for use in R (Visual Studio 2015). I am using this as a reference and to begin with some test code: http://adv-r.had.co.nz/C-interface.html stdafx.h: #include #include…
Stefan Voss
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VS2010 compiling errors for libfreenect (OpenKinect library)

I'm installing libfreenect (OpenKinect) to interface the Kinect with Arduino for a tangible media project on Windows 7. I'm stuck at the compiling stage in VS2010 with 61 errors of this type. Error 1 error LNK2019: unresolved external…
KevinH
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Unresolved external when trying to link against a dll

I'm trying to link against a dll that I have all the source for, but I can't get access to a dirt simple class I've created in it without getting LNK2019's. I made this: class makeprob { public: makeprob(); ~makeprob(); }; with the…
Tintelpe
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LNK2019 error when building solution

I am trying to compile a sample code using OpenHaptics libraries in Visual Syudio 2010. I linked the multi-threaded C-runtime, and the libraries through Project Properties -> Linker -> Input. And included the directories as well. The file.dll is in…
Victor Arnez
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Using QCustomPlot in Visual Studio, getting unresolved external symbol error

I am trying to compile a project in Visual studio using Qt plug-in and QCustomPlot library. The code works perfectly fine in QT creator but when I migrate the code to Visual Studio (which I need to use for unrelated reasons) I get this linking…
Tommy Orok
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