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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 error: Unable to run a function

I'm having difficulty with my program. I am not nearly finished, but just debugging this, I am receiving an error: error LNK2019: unresolved external symbol _WinMain@16 I have no idea what is possibly wrong with my program. Could anyone inform me…
user3461947
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How to solve error LNK2019: unresolved external symbol error in Visual Studio 2012 with C++?

I have a visual c++ console project named "C_test". Another project is called "dll_project" which is dll project. in "C_test" project, I have set the location of additional include directory for "dll_project". I have these simple codes. in "C_test"…
Joshua Son
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LNK 2019 Unresolved External Symbol Error

I get the following errors when I try to compile my VS2012 project: error LNK2019: unresolved external symbol "public: int __thiscall map::GetBlockRef(int,int)" (?GetBlockRef@map@@QAEHHH@Z) referenced in function "public: void __thiscall…
Tobias Sundell
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My function is returning this, error LNK2019: unresolved external symbol "double __cdecl MEAN

double mean(int A[], int size) { int count = size; double sum = std::accumulate(A, A + count, 0 ); double ave = sum / count; return ave; } I've included numeric but dont know what to do from here
user3362113
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LNK2019, LPCTSTR, and C++ syntax in general

Allow me to preface this question with 2 comments: 1) I'm a C# developer, so I don't have much practice dealing with linker errors in C++ and some standard C++ syntax is a bit unfamiliar to me. I suspect this will be an easy question to the C++…
David
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LNK2019 Error at template function of my class

i got the following error "Fehler 9 error LNK2019: Verweis auf nicht aufgelöstes externes Symbol ""public: bool __cdecl gameClass::getAttribute(class std::basic_string,class std::allocator >)"…
Weexe
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Linker errors LNK2001 and LNK2019

I am compiling my Qt project using compiler MSVC2008, and I am getting linker errors like- _class_name.obj_:error LNK2001: unresolved external symbol "public: static struct QMetaObject...."... referenced in a function…
Anwar Shaikh
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Error LNK2019 in visual studio in win32 application?

I have making an attempt at writing my first program in Visual Studio, however am being troubled by an error. It says: - Error 3 error LNK2019: unresolved external symbol _wWinMain@16 referenced in function ___tmainCRTStartup …
user3159519
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CMake linking error on windows

I have an annoying CMake issue. I have a project with more than one directories, such as (theoretically): compiler -> generates compiler.exe and compiler.dll This is pure C++ However the compiler.dll needs to link to machine.dll (see below) due…
Ferenc Deak
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LNK2019 & LNK1120 Unresolved Externals Probably an easy fix, but I'm having real trouble

I've been getting these LNK2019s for a little while now and can't seem to find a way to get rid of them. I'm aware that there are a lot of threads on these errors already, but I've yet to find anything that's helped me so hoped someone might miss…
user3113324
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How To Fix " Error LNK2019 : unresolved external symbol ... "

I tried to make a calculator for midterm and final grades of 5 students. 40% of Midterm and 60% of finals in an array a[5][3]. a[5][3] because 5 students, 3 lines because 1 for midterm another for finals and last one for overall grade(40% of Mid. +…
Dux
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Issue: "error LNK2019: unresolved external symbol"

I have relatively simple setup. I have a new Console C++ project. But I was playing with global vars in C, and added two new .c files like this. // Fruit.h extern int global_variable; Now the source: // Fruit.c #include "Fruit.h" #include…
user2568508
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error LNK2019: when trying to return a vector

I ve created a method in a class that returns a vector in a opencv project. Class cpp and header code: Detection::Detection(){} vector detection(string fileName) { Mat image, gray_image; string path = "C:\\"+ fileName; image =…
Jose Ramon
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What does LNK2019 actually mean? Blackjack project error

I have been programming in c++ for about six months now. Just recently i started to make a blackjack simulator in QT creator, which means i am very new to the QT environment. I have created a few classes i thought was needed etc. Everything works…
Iterator
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LNK Errors in Qt when trying to inherit?

I'm attempting to call a method from another class Bookmarks, however I keep getting LNK errors when I build my program and I don't understand why. mainwindow.obj:-1: error: LNK2019: unresolved external symbol "public: class QStringList __cdecl…
Boggy B
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