Unresolved externals qt. I didn't modify th I am building the latest QtCreator source downloaded from git, while building I get this error: . The project is here:obs-plugintemplate Feb 6, 2013 · I've been through 20 subject about this error, but I didn't figure how to fix it -I'm using Qt 5. dll:-1: error: LNK1120: 1 unresolved externals Feb 7, 2023 · every time i added the opengl widget to my form i always gett lnk2019 unresolved external symbol errors and i did add QT += opengl to the pro file Mar 30, 2024 · https://academy. cpp in correct project. cpp? Looking at the generated main. obj : error LNK2019: unresolved external symbol "__declspec(dlli Jul 4, 2014 · C:\Qt\Qt5. Jun 1, 2015 · Hi SGaist, and thanks for the reply. After much reading, I've compiled Qt 4. 5. I am not a CMake expert so I start fro Dec 29, 2020 · I get "LNK2019: unresolved external symbol" error when trying to create new slot in any window class with standard C++ library arguments. //edit You were right! Including that lib has taken the 171 unresolved externals to 154 Going further down the list of errors and including libs of the Jun 1, 2015 · I am building for the Windows 32-bit platform, using Visual Studio 2010, on Windows 7. Details: I'm using Windows Dec 17, 2018 · Hi, I would like to create a custom class from the great lib QtAV, in a Qt lib template. obj:- 1: error: LNK2019: unresolved external symbol "public: __cdecl MapBuilder::MapBuilder(void)" (??0 MapBuilder@@QEAA@XZ) referenced in function "public Nov 10, 2011 · I have imported the Qt proj using Qt addin than in project settings beside the Qt libs (core, gui etc) I have entered my lib. If you want which datatype then, as I already said, anything which consists of only one word to not confuse the moc compiler. Why not simplify and either build a small tool inside of Qt Mar 30, 2024 · @ a_coder said in unresolved external symbol "public: static struct QMetaObject const staticMetaObject": #include "control. obj:-1: error: LNK2001: unresolved external symbol "public: static struct QMetaObject Nov 26, 2016 · To start viewing messages, select the forum that you want to visit from the selection below. //edit You were right! Including that lib has taken the 171 unresolved externals to 154 Going further down the list of errors and including libs of the functions on MSDN is now only decreasing by 0-2 errors per lib. dll:-1: error: LNK1120: 1 unresolved externals I see that many many plugins get compiled but when it reaches qmldesigner plugin the compilation stops with the above error. dll What lib is that? Is it your own? Please show the whole error message. Here is the relevant output from calling cmake --build . xz as source That's how I set up my build environment: CALL "C:\\Program Files (x86)\\Microsoft Visual Studio\\ Feb 6, 2013 · I've been through 20 subject about this error, but I didn't figure how to fix it -I'm using Qt 5. Nov 11, 2019 · Linking error with zlib library - LNK2019: unresolved external symbol _deflate referenced in function Dec 22, 2021 · @ dgsham said in [CMake] Linking errors using MSVC: C:\Qt\5. 2010) (as this is our main compiler tool) and I still end up with the same results. obj:-1: error: LNK2001: unresolved external symbol "pub @Swati777999 said in Debugging : Unresolved Externals: filename. I have shown topics on the internet, but it' Mar 1, 2015 · Hello, When I try to build my project using quazip I get the following log: @ updatingwindow. obj files for the library. Aug 23, 2017 · I'll take a look at the UxTheme lib now. After installing Qt VS tools,i created a QtGUIapplication,and tried to compile it. 1. Simply unchecking the checkbox and rebuilding solved the problem. 2 - with visual studio 2010 on windows 7 Hi All, Hope you're doing well. I also tried building with mingw here: MinGw can't compile test file from cmake but I get these other errors. In this case Ole32. All works well until point 10 Subclassing QWidget. Over 90 percent of questions asked here gets answered. 9. Aug 23, 2017 · Qt (Static Build) Unresolved Externals (MSVC2017) Unsolved General and Desktop 7 Posts 2 Posters 3. 15. obj : error LNK2001: unresolved external symbol "struct QMetaObject const myclass::staticMetaObject" ( Mar 27, 2011 · Thank you for the replies, so to update I've just recompiled Qt from the 4. +1 (if any). Make sure that cmake picks up the correct qmake. 1 32bits for VS 2017 in static linking mode,commands I used can be found here. 2 sources and I am still getting these unresolved errors. OS: win 10 QT - branches ifw-5. If I delete the generated files and mess with it, sometimes it builds fine. Apr 4, 2018 · Linker error 2001: mainwindow. I also built Qt from 4. Jun 25, 2020 · While building a sample application using Qt 4. Feb 14, 2006 · Hi, In porting to Qt4 I'm finally linking but run into unresolved externals: Mar 16, 2025 · After build is successful I create new script in D:\qt\qt_test_s\installer-framework to build installer framework Make sure installer framework is in correct branch also. 0 and Qt 5. Usually, it means you've #included some third party library's header file but not told the linker where to find the corresponding . 3 along with Microsoft VisualC++ 6 , we are facing the following errors during the linking phase. obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: virtual class QVariant I'll take a look at the UxTheme lib now. Also I am calling foo () in mainwindow class (in constructor) and added #include of the header with the definition of the function. I'm getting an unresolved external __Init_thread_epoch that I can't locate. Mar 11, 2019 · When building with Qt Creator, you have to disable the QtQuick compiler in the qmake build step. EXE"' : return code '0x460' I've been trying to build using static qt for a while but i can't get rid of these errors . lib Jan 12, 2024 · Hello, I'm compiling a QT project for OBS Studio. Apr 4, 2014 · Hello, I have three errors and I don't know where it comes from and how to solve it. I have downloaded the single zip file src that is on the /download page. : Aug 29, 2023 · Qt QTBUG-116582 qtbase\plugins\sqldrivers\qsqlpsql. obj gui's makefile, I get a bunch of link errors for already defined functions (not qt_wince_calloc), plus some unresolved externals from other parts of qfunctions_wince. Oct 18, 2021 · can't emit a signal from a class, error: LNK2019: unresolved external symbol Unsolved General and Desktop 6 Posts 3 Posters 1. 5 building with Qt 6. Nov 26, 2016 · Hello, Have you installed the windows SDK and linked the appropriate system libraries? If not, then do so. (I'm new here. Aug 17, 2013 · Hi All, I am getting three errors when I try to pass an object to another class. dll. Not to mention if I check out from source instead of using a zip file I need git as well. Aug 23, 2017 · I'm not an expert in this area. But just as a heads-up before others try to help you: it might help if you gave a few examples (from your 171) of precisely what symbols are reported unresolved, so that someone could perhaps identify a missing library. lib but it doesn't seem to register the linkage at all. h includes control. There are only 6 linker errors, which leads me to believe the executable is at least partially linking. bat and jom, yet when I try to make a stand-alone application I run into 171 Unresolved externals from the following libraries Apr 28, 2017 · I'm in the stages of learning Q Creator and was following tutorial and when I tried to compile, I was returned with these errors: moc_mainwindow. moc file, it seems probable that this would help. 0 and qmake for creating my build Makefiles. When I compile I get error: unresolved external symbol "int __cdecl qInitResources_mdi (void)" This function is generating in qrc_mdi. Using Depends on the (Intel) built . dll files and depends itself on 3rd Jun 7, 2020 · error: LNK1120: 1 unresolved externals Solved General and Desktop 6 Posts 2 Posters 540 Views Oldest to Newest Mar 30, 2024 · JonB wrote on 4 Apr 2024, 07:05 4 Apr 2024, 14:06 #24 @ jsulm said in unresolved external symbol "public: static struct QMetaObject const staticMetaObject": more than one QObject based class in one header file I don't want to derail this thread, but spoke to @ Chris-Kawa a while ago and we both agree we have done this for years with no problems. On a partial side rant, why a dependency on python? I understand it's nice to use other tools when building but if I'm putting together a base system I now have to install both ActivePerl and Python. The errors occur when I follow this video: h This subreddit is currently closed in protest to Reddit's upcoming API changes that will kill off 3rd party apps and negatively impact users and mods alike. bat and jom, yet when I try to make a stand-alone application I run into 171 Unresolved externals from the following libraries Mar 11, 2019 · When building with Qt Creator, you have to disable the QtQuick compiler in the qmake build step. 9k Views Sep 23, 2012 · Getting unresolved externals for a basic example of opengl i found online? Code and include file descriptions attached May 31, 2017 · Unresolved external symbol when connecting with new syntax Solved General and Desktop 12 Posts 4 Posters 3. 8. 3 + New Features May 16, 2022 · How to fix the "unresolved external symbol" error during OpenCV 4. h includes mainw. 0\VC\Bin\amd64\link. 7. <QtGuiApplication4> (29 items) Error LNK2019: unresolved external symbol Aug 30, 2012 · Continue to help good content that is interesting, well-researched, and useful, rise to the top! To gain full voting privileges, Aug 28, 2020 · @J-Hilk said in unresolved external symbol "public: virtual struct QMetaObject const *: @ Perdrix this is inside main. moc" at the end of the file? At the end of main. Qt 5. \. I saved and moved all project dir in my Visual solution dir. 22. cxx for inclusion in the project and clean up the unresolved externals. 8 shared with visual studio 2015, Oct 9, 2018 · I try to run an project and the fallowing 19 errors appear : -main. 2 - with visual studio 2010 on windows 7 64bit Dec 30, 2012 · Hi everybody, I am a starter in Qt programming and currently following the C++ Qt programming videos on Youtube. This is not going to work. Mar 18, 2014 · Still really new to QT development Not entirely sure why I am seeing the linker error: debug\\myproject. Jan 23, 2025 · The cmake-gui sources compile perfectly fine, but they fail to link. h. Edit: Please, don't post the same question in multiple subforums. exe : fatal error LNK1120: 1 unresolved externals jom: Mar 27, 2019 · I need to build static QT 5. PS. 1 cmake 3. 2 with MSVC 2017 64bit throws error: . The errors are: film. obj:-1: error: LNK2019: unresolved external symbol "__declspec (dllimport) public: static class vtkBorderWidget * __cdecl vtkBorderWidget::New (void)" (_ imp?New@vtkBorderWidget@@SAPEAV1@XZ) referenced in function "public: static class vtkSmartPointer<class vtkBorderWidget> __cdecl vtkSmartPointer<class vtkBorderWidget>::New . Hello, please redirect me if my question does not belong here and please ask if I missed any important information. 4 static librarie Jan 13, 2018 · After I deleted the folder "build-HelloWorld-Desktop_Qt_5_10_0_MSVC2015_64bit-Debug" and rebuild the project, all linking errors are gone. obj:-1: error: LNK2019: unresolved external symbol "public: __thiscall LabelBox::LabelBox Mar 30, 2013 · To start viewing messages, select the forum that you want to visit from the selection below. Here is the command-line with which I invoke the configure utility: May 4, 2014 · I copied code from working project to another. 1 for Windows (VS 2010 ultimate) with Qt Visual Studio Add-in. This isn't a Qt question by the way. h and control. obj_:error LNK2001: unresolved external symbol "public: static May 11, 2021 · Hello, On a project using a shared library using Qt6, the compiler raise the LNK2001 error unresolved external symbol. The Qt project was made in Qt creator, a simple project. Compiling. 0 source code. h May 11, 2015 · I can not figure out why I am getting the errors: main. 0. h" class Timer; class control; You have a circular dependency: mainw. dll:-1: error: LNK1120: 1 unresolved externals I see that many many plugins get compiled but when Feb 6, 2013 · Forget about the font and all of these stuff they are commented ,any way I edited the post and deleted them. h and already have a forward declaration for it, the control. Mar 16, 2025 · Hi! Currently I'm trying to build sources of IF with dynamically linked QT. 0\qtbase\plugins\mediaservice\wmfengin ed. This will generate the moc_*. 6. The creation of the Display object is in line 10 Apr 27, 2017 · borderwidgetqt. 2, 5. Qt Centre is a community site devoted to programming in C++ using the Qt framework. h include is not needed Sep 19, 2012 · I keep getting unresolved externals when I change code that uses Qt in VC++ There is no actual code missing, it relates to the generated code. Mar 16, 2025 · Unresolved external symbol while building Installer Framework Hi! Currently I'm trying to build sources of IF with dynamically linked QT. 1, Qtcreatro 2. Also, I will read the links you gave me and pay more attention to this issue later. Since you only use Timer* in mainw. However, I've encountered an issue, and I n Qt Creator QTCREATORBUG-22115 Building Qt Creator 4. exe so the correct libs are used. Jan 17, 2019 · Get link error when build dll library: 1>animationitem. bat and jom, yet when I try to make a stand-alone application I run into 171 Unresolved externals from the following libraries After a day or so I've finally gotten a (or what should be) statically compiled Qt Library. Finally I have compiled but got unresolved externals. Nov 16, 2016 · Hi, As a beginner I read Qt for Beginners. 1, Visual Studio 2013, msvc2012. cpp looks like this: #include Q_IMPORT_PLUGIN(QtQuick2Plugin) Q_IMPORT_PLUGIN(QtQ Dec 19, 2018 · LNK2019: unresolved external symbol issue happens when calling a function from third party static library Jul 23, 2025 · Errors are typical while working with C++ programs, and LNK2019: Unresolved External Symbol - Function is one particularly such annoying issue that occurs when the declared and used function or variable in our code is not found by the linker. libs results in an error: QTSQL. obj:-1: error: LNK2019: unresolved external symbol Aug 13, 2017 · I compiled Qt 5. bat in the Qt\\5. lib and even tried adding in enet. 12. Welcome to Qt Centre. cpp? have you added #include "main. 3 compiler: msvc, tried compilers from different Visual Studios: 2015, 2017, 2019 That's how I build dynamic QT Qt Code Jan 4, 2018 · Home Qt Development General and Desktop Unresolved External Symbol - GetRegValueA () Forum Updated to NodeBB v4. This is my very simple app : @#include #include #include class MyClass : public Aug 10, 2015 · I am trying to get libqglviewer to work in visual studio, I have installed Qt5. I'm totally lost and spend days on google to solve these issues. ) I spend many days to overcome the problem of "unresolved external symbols" I get. 9k Views Oldest to Newest Oct 2, 2013 · Seems to have worked for me to. Jul 20, 2013 · I used qt creator to add statically linked external library and selected the enet64. 1k Views 1 Watching Oldest to Newest Aug 13, 2024 · I'm using a QT static libraries to build application. I now need to use the static libraries. Is that a Qt thing? A Qwt thing? A Windows 10 thing? Any leads are greatly appreciated. I have added the include directories for QGLViewer and QT in the project settings together wi Jan 14, 2014 · I am compiling my Qt project using compiler MSVC2008, and I am getting linker errors like- _class_name. Finally I have After a day or so I've finally gotten a (or what should be) statically compiled Qt Library. 2\mingw81_64\lib\libQt5Widgets. /edit Mar 11, 2019 · When building with Qt Creator, you have to disable the QtQuick compiler in the qmake build step. 3k Views 1 Watching Oldest to Newest C++ Fatal Error LNK1120: 1 unresolved externals Asked 14 years, 1 month ago Modified 2 years ago Viewed 330k times Sep 3, 2012 · Thread: Getting unresolved external symbol when trying to compile a Qt application Thread Tools 3rd September 2012, 12:33 #1 Hossein May 9, 2012 · If I try just copying the file into the gui/tmp/obj/release_shared folder and adding the . 6-lts-lgpl, (tried different) IF - branch 4. 2 using the Intel C++ Composer XE 2011 (v12. I have a new Windows project in Qt using VS2017/Windows. qt. 9k Views 1 Watching Oldest to Newest Apr 2, 2014 · Hi, It's rather that one or more of these functions are calling windows specific API (s) and you don't link to the corresponding library. What part of the docs would tell me that I needed to do that? I failed to spot anything in the "Using the Meta Aug 13, 2016 · mainwindow. 0 support in Visual Studio 2019? Jun 28, 2022 · My environment is: win10 vs 2022 Qt 6. As for the compiler/linker option tos I've already done that. 6-lts-lgpl, (tried different) IF - b Aug 15, 2012 · I recently started learning QT (with the help of book Foundations of Qt Development) and I have Qt libraries 4. Oct 6, 2023 · Hi, I am trying to build a Qt6 project on windows 10. dll : fatal error LNK1120: 5 unresolved externals NMAKE : fatal error U1077: '"c:\Program Files (x86)\Microsoft Visual Studio 10. When I compile my class directly from my app, it works well. 1 root folder, and it contains cd qtbase || exit /b 1 and call % Feb 12, 2014 · I get error ( and see my code below ) : @SqlQueryModel. Apr 26, 2015 · I'm making a little GUI program using Qt creator, but I get stuck with two "unresolved externals" errors. 0 64-bit for VS 2012. I have no idea how Sep 13, 2016 · To start viewing messages, select the forum that you want to visit from the selection below. obj:-1: error: LNK2019: unresolved external symbol "public: __thiscall Standbywindow::Standbywindow (void Mar 15, 2025 · error LNK2019: unresolved external symbol __imp_glBegin referenced in (I have both Qt OpenGL & QtOpenGLWidget modules included) Mar 30, 2024 · unresolved external symbol "public: static struct QMetaObject const staticMetaObject" General and Desktop qt6 qmetaobject msvc2022 26 Posts 4 Posters 3. Qt is a cross-platform application and UI framework for developers using C++ or QML, a CSS & JavaScript like language. But in this project this file is not generating. But if Feb 17, 2017 · I am using the following configure line to compile QT 5. private slots Oct 25, 2011 · I have a Qt application built using the shared libraries. Feb 18, 2016 · Re: LNK1120: 1 unresolved externals for toUtf8 and assertion for QString::toStdString Some earlier versions of Qt were built with the MSVC flag "treat wchar_t as a built-in type" set to FALSE. I have imported the Qt proj using Qt addin than in project settings beside the Qt libs (core, gui etc) I have entered my lib. If you are looking for information about Qt related issue — register and post your question. 1 libs on Windows 10 using qt-everywhere-src-5. Here are all of my code: (By the way, I following the book C++ GUI Programming with Qt4, se Mar 11, 2019 · When building with Qt Creator, you have to disable the QtQuick compiler in the qmake build step. 4. LIB No DOS or PE signature found Apr 18, 2016 · I use MSVC 2014, MinGw-w64 4. Dec 21, 2015 · I created an instance of QGuiApplication and a signal in order test if it works and I always get that the compiler could not resolve external symbols: test. io/catalog 0 C Christian Ehrlicher @ a_coder said in unresolved external symbol "public: static struct QMetaObject const staticMetaObject": How should I know which value you send through signals and slot. \lib\qtcreator\plugins\qmldesigner\qtquickplugin4. 1024. There were not here before. . My qml_plugin_import. I am using conan for dependency management (so thats what is pulling in Qt) and cmake with a VS genera Jan 5, 2013 · 4 I use CMake to manage Qt projects and the new Q_OBJECT needs to be added under the QT4_WRAP_CPP call. dll : fatal error LNK1120: 30 unresolved externals After a day or so I've finally gotten a (or what should be) statically compiled Qt Library. 1 Would this environment provide the bug unresolved external symbol? Apr 2, 2014 · [SOLVED] Unresolved external symbols General and Desktop 6 Posts 4 Posters 3. When I enter code and try to compile I get 'error LNK2019: unre Aug 11, 2012 · To start viewing messages, select the forum that you want to visit from the selection below. All the errors here talk about using qmake Qt Unresolved external symbol LNK2019, but I want to use pure cmake. tar. I'm on Windows 10 and am using Visual Studio 2022, coding with C++. ave ran configure. obj. May 17, 2024 · Hello everyone, I am using Windows 11 and Visual Studio Version 2022 to compile the Qt version 6. 3. Actually, I'm just running configure. I'm getting an error in my code which shows the message as "Unresolved Externals" in the location of filename. My project consists of several . 2. An unresolved symbol is one that you've declared somewhere but never defined. As I'm a Newbie you probably have some helpful comments on where I can trace my errors to. . a : warning LNK4272: library machine type 'x64' conflicts with target machine type 'x86' This should tell you enough - you're trying to link against the Qt libs compiled for MinGW while using the MSVC compiler. ctaoemb jmt9gk tyqn ovvht x8883n cp wjesp ao0 zpg fll