Unresolved externals qt. Aug 23, 2017 · I'm not an expert in this area. 

Unresolved externals qt. Welcome to Qt Centre.


Unresolved externals qt. Welcome to Qt Centre. Make sure that cmake picks up the correct qmake. 4. I didn't modify th I am building the latest QtCreator source downloaded from git, while building I get this error: . ave ran configure. Aug 23, 2017 · Qt (Static Build) Unresolved Externals (MSVC2017) Unsolved General and Desktop 7 Posts 2 Posters 3. Also, I will read the links you gave me and pay more attention to this issue later. Apr 26, 2015 · I'm making a little GUI program using Qt creator, but I get stuck with two "unresolved externals" errors. 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. Aug 17, 2013 · Hi All, I am getting three errors when I try to pass an object to another class. Using Depends on the (Intel) built . If you want which datatype then, as I already said, anything which consists of only one word to not confuse the moc compiler. 2010) (as this is our main compiler tool) and I still end up with the same results. 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. I have no idea how Sep 13, 2016 · To start viewing messages, select the forum that you want to visit from the selection below. Apr 4, 2014 · Hello, I have three errors and I don't know where it comes from and how to solve it. 3. Compiling. Over 90 percent of questions asked here gets answered. 2, 5. private slots Oct 25, 2011 · I have a Qt application built using the shared libraries. 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. 1, Visual Studio 2013, msvc2012. \lib\qtcreator\plugins\qmldesigner\qtquickplugin4. Jun 1, 2015 · Hi SGaist, and thanks for the reply. cpp? Looking at the generated main. lib but it doesn't seem to register the linkage at all. 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. ) I spend many days to overcome the problem of "unresolved external symbols" I get. 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. When I compile my class directly from my app, it works well. Jan 17, 2019 · Get link error when build dll library: 1>animationitem. 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. 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. However, I've encountered an issue, and I n Qt Creator QTCREATORBUG-22115 Building Qt Creator 4. . There are only 6 linker errors, which leads me to believe the executable is at least partially linking. 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. May 17, 2024 · Hello everyone, I am using Windows 11 and Visual Studio Version 2022 to compile the Qt version 6. An unresolved symbol is one that you've declared somewhere but never defined. Usually, it means you've #included some third party library's header file but not told the linker where to find the corresponding . <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. 1k Views 1 Watching Oldest to Newest Aug 13, 2024 · I'm using a QT static libraries to build application. 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 . I'm on Windows 10 and am using Visual Studio 2022, coding with C++. 0 source code. Mar 11, 2019 · When building with Qt Creator, you have to disable the QtQuick compiler in the qmake build step. 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. Mar 16, 2025 · Unresolved external symbol while building Installer Framework Hi! Currently I'm trying to build sources of IF with dynamically linked QT. My project consists of several . 2 using the Intel C++ Composer XE 2011 (v12. This is not going to work. bat in the Qt\\5. cpp? have you added #include "main. lib and even tried adding in enet. The creation of the Display object is in line 10 Apr 27, 2017 · borderwidgetqt. The errors are: film. 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. h May 11, 2015 · I can not figure out why I am getting the errors: main. Qt is a cross-platform application and UI framework for developers using C++ or QML, a CSS & JavaScript like language. 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. I'm getting an unresolved external __Init_thread_epoch that I can't locate. I'm totally lost and spend days on google to solve these issues. obj:-1: error: LNK2019: unresolved external symbol Aug 13, 2017 · I compiled Qt 5. 8. I'm getting an error in my code which shows the message as "Unresolved Externals" in the location of filename. obj:-1: error: LNK2001: unresolved external symbol "pub @Swati777999 said in Debugging : Unresolved Externals: filename. Also I am calling foo () in mainwindow class (in constructor) and added #include of the header with the definition of the function. 0\VC\Bin\amd64\link. Apr 4, 2018 · Linker error 2001: mainwindow. I am not a CMake expert so I start fro Dec 29, 2020 · I get &quot;LNK2019: unresolved external symbol&quot; error when trying to create new slot in any window class with standard C++ library arguments. All works well until point 10 Subclassing QWidget. 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. If you are looking for information about Qt related issue — register and post your question. I now need to use the static libraries. moc" at the end of the file? At the end of main. 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 . 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. 0 support in Visual Studio 2019? Jun 28, 2022 · My environment is: win10 vs 2022 Qt 6. 15. 1 cmake 3. exe : fatal error LNK1120: 1 unresolved externals jom: Mar 27, 2019 · I need to build static QT 5. Since you only use Timer* in mainw. After much reading, I've compiled Qt 4. cxx for inclusion in the project and clean up the unresolved externals. Nov 16, 2016 · Hi, As a beginner I read Qt for Beginners. 1 libs on Windows 10 using qt-everywhere-src-5. h includes control. : Aug 29, 2023 · Qt QTBUG-116582 qtbase\plugins\sqldrivers\qsqlpsql. The Qt project was made in Qt creator, a simple project. 6. 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 . 0 and qmake for creating my build Makefiles. 0 64-bit for VS 2012. dll. Simply unchecking the checkbox and rebuilding solved the problem. Hello, please redirect me if my question does not belong here and please ask if I missed any important information. 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. Finally I have After a day or so I've finally gotten a (or what should be) statically compiled Qt Library. 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. h and control. 0. Here is the command-line with which I invoke the configure utility: May 4, 2014 · I copied code from working project to another. LIB No DOS or PE signature found Apr 18, 2016 · I use MSVC 2014, MinGw-w64 4. 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. 0 and Qt 5. But in this project this file is not generating. 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. Qt 5. Nov 26, 2016 · Hello, Have you installed the windows SDK and linked the appropriate system libraries? If not, then do so. This isn't a Qt question by the way. My qml_plugin_import. 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. 22. Finally I have compiled but got unresolved externals. I have downloaded the single zip file src that is on the /download page. 6-lts-lgpl, (tried different) IF - branch 4. 3 along with Microsoft VisualC++ 6 , we are facing the following errors during the linking phase. I have a new Windows project in Qt using VS2017/Windows. 2 sources and I am still getting these unresolved errors. 2 with MSVC 2017 64bit throws error: . 12. 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. 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. +1 (if any). 8 shared with visual studio 2015, Oct 9, 2018 · I try to run an project and the fallowing 19 errors appear : -main. 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. All the errors here talk about using qmake Qt Unresolved external symbol LNK2019, but I want to use pure cmake. libs results in an error: QTSQL. When I compile I get error: unresolved external symbol "int __cdecl qInitResources_mdi (void)" This function is generating in qrc_mdi. 1 32bits for VS 2017 in static linking mode,commands I used can be found here. 2 - with visual studio 2010 on windows 7 Hi All, Hope you're doing well. h. (I'm new here. 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. cpp in correct project. . \. Aug 23, 2017 · I'll take a look at the UxTheme lib now. 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. Jun 25, 2020 · While building a sample application using Qt 4. 5. After installing Qt VS tools,i created a QtGUIapplication,and tried to compile it. 9k Views Oldest to Newest Oct 2, 2013 · Seems to have worked for me to. As I'm a Newbie you probably have some helpful comments on where I can trace my errors to. 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. 2\mingw81_64\lib\libQt5Widgets. dll : fatal error LNK1120: 5 unresolved externals NMAKE : fatal error U1077: '"c:\Program Files (x86)\Microsoft Visual Studio 10. 5 building with Qt 6. Edit: Please, don't post the same question in multiple subforums. 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. Jan 23, 2025 · The cmake-gui sources compile perfectly fine, but they fail to link. 0\qtbase\plugins\mediaservice\wmfengin ed. Qt Centre is a community site devoted to programming in C++ using the Qt framework. //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. dll What lib is that? Is it your own? Please show the whole error message. tar. lib Jan 12, 2024 · Hello, I'm compiling a QT project for OBS Studio. moc file, it seems probable that this would help. exe so the correct libs are used. 1 for Windows (VS 2010 ultimate) with Qt Visual Studio Add-in. //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. 7. Here is the relevant output from calling cmake --build . 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. 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. I also built Qt from 4. 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. 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. But if Feb 17, 2017 · I am using the following configure line to compile QT 5. 1024. I also tried building with mingw here: MinGw can't compile test file from cmake but I get these other errors. 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. Is that a Qt thing? A Qwt thing? A Windows 10 thing? Any leads are greatly appreciated. 1, Qtcreatro 2. 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. h includes mainw. 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. Jul 20, 2013 · I used qt creator to add statically linked external library and selected the enet64. 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. 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. As for the compiler/linker option tos I've already done that. obj. 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. If I delete the generated files and mess with it, sometimes it builds fine. 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. 2. 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. 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. This will generate the moc_*. 9. obj : error LNK2019: unresolved external symbol "__declspec(dlli Jul 4, 2014 · C:\Qt\Qt5. Actually, I'm just running configure. 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. 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. h" class Timer; class control; You have a circular dependency: mainw. There were not here before. /edit Mar 11, 2019 · When building with Qt Creator, you have to disable the QtQuick compiler in the qmake build step. 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. 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. obj files for the library. PS. 1. In this case Ole32. Oct 6, 2023 · Hi, I am trying to build a Qt6 project on windows 10. OS: win 10 QT - branches ifw-5. 3 + New Features May 16, 2022 · How to fix the "unresolved external symbol" error during OpenCV 4. qt. 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. 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. obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: virtual class QVariant I'll take a look at the UxTheme lib now. 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. Mar 18, 2014 · Still really new to QT development Not entirely sure why I am seeing the linker error: debug\\myproject. Mar 16, 2025 · Hi! Currently I'm trying to build sources of IF with dynamically linked QT. I saved and moved all project dir in my Visual solution dir. h and already have a forward declaration for it, the control. 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. 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. 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. bp9t nqe6n mrek wfi bsy jy4w 8yz mvip89 sx p8ik