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Linker Error Undefined Reference To Vtable For Mainwindow


How do spaceship-mounted railguns not destroy the ships firing them? First the linker was unable to find the vtables and after the modification the linker was able to link the runnable. Explicitly running qmake is, indeed, required. –Thomas Aug 31 at 14:11 add a comment| up vote 13 down vote I've seen a lot of ways to solve the problem, but no The problem is often when a file starts off as not requiring the moc compilation phase, but later does (the Q_OBJECT macro is added after the file has already been added navigate to this website

c++ qt linker cmake moc share|improve this question edited Nov 6 '13 at 23:11 asked Nov 4 '13 at 4:43 Iskar Jarak 2,90022145 By the way, why don't you I will try running moc manually and get back to you, though. –Iskar Jarak Nov 4 '13 at 5:41 Just confirming I get the same error when manually calling It is possible to compile the class without defining the virtual functions, but as soon as the linker tries to look up the function definitions it finds nothing and fails with Public huts to stay overnight around UK Want to make things right, don't know with whom Yinipar's first letter with low quality when zooming in Wardogs in Modern Combat more hot http://stackoverflow.com/questions/2555816/qt-linker-error-undefined-reference-to-vtable

Undefined Reference To Vtable Qt Cmake

Reply With Quote + Reply to Thread Quick Navigation Qt Programming Top Site Areas Settings Private Messages Subscriptions Who's Online Search Forums Forums Home Forums Qt Newbie Qt Programming Qwt Qt You either have to a) Create an empty body that will be called if no child class reimplements the function b) Create a child class that implements the virtual functions and up vote 1 down vote favorite I've read the FAQ and several other websites about this, but I can't seem to find the proper solution. Maybe try this simple example with qmake first to see if this is even related to CMake. –ypnos Nov 6 '13 at 1:18 1 I have news.

Log in to Reply hila says: January 4, 2014 at 14:33 hi!!! Is there a mutual or positive way to say "Give me an inch and I'll take a mile"? Reply spandan says: October 16, 2010 at 16:33 "This happens because moc (Qt’s meta-object compiler) only runs on header files by default" After hours of hunting, finally the solution..thanks man..i had Undefined Reference To Vtable For Class Qobject In it, you'll get: The week's top questions and answers Important community announcements Questions that need answers see an example newsletter By subscribing, you agree to the privacy policy and terms

Nov 10 '15 at 15:08 ok, qmake cant find it, can you find it with a file browser? –The Badger Nov 10 '15 at 15:08 | show 6 more Your top level CMakeLists.txt might look like: cmake_minimum_required(VERSION 2.8.9) #set(CMAKE_AUTOMOC ON) set(CMAKE_PREFIX_PATH "/opt/Qt/5.1.1/gcc_64") set(CMAKE_INCLUDE_CURRENT_DIR ON) project(hello-world) find_package(Qt5Widgets REQUIRED) set(HW_HEADER_DIR ${CMAKE_CURRENT_SOURCE_DIR}/inc) set(HW_GUI_DIR ${CMAKE_CURRENT_SOURCE_DIR}/gui) include_directories(${HW_HEADER_DIR}) subdirs(src) and your src level one like: qt5_wrap_cpp(hello-world_SRC In general, the problem can be solved by generating the vtable in every TU where the class is defined, and then let the linker eliminate duplicates. says: February 23, 2011 at 18:14 Thanks!

Qt's meta-object macros are kind of picky in this regard. Undefined Reference To Metaobject Const I added the header files and cpp files in the project file and there was no error. The project compiled (and ran) without errors for the simulator, but when changing target to run on a device it didn't compile. http://forums.codeblocks.org/index.php/topic,2253.0.html Reply Doug says: March 26, 2011 at 00:43 This helped me *so* much; I probably never would have thought to do this.

Undefined Reference To Vtable Qt Qobject

Why does Mal change his mind? http://stackoverflow.com/questions/5854626/qt-signals-and-slots-error-undefined-reference-to-vtable-for I just spent an hour on this error before solving it by rerunning qmake from the terminal. Undefined Reference To Vtable Qt Cmake Log in to Reply george says: June 16, 2013 at 17:33 Thnx!!u helped me very much! 🙂 Log in to Reply Gianni Comoretto says: July 30, 2013 at 18:27 I hit Qt Undefined Reference To Vtable For Class The first thing I'd do is to put the class declaration in a separate header file, perhaps the build system isn't scanning implementation files.

Thank you. –iizno Mar 25 '13 at 12:25 add a comment| Not the answer you're looking for? useful reference From the command line, just using make normally also updates some qmake-related stuff, but apparently not enough. add a comment| 5 Answers 5 active oldest votes up vote 71 down vote accepted It is because the unit generated by MOC isn't included in the linking process. I've also cleaned the environment. Qt Undefined Reference To Vtable For Constructor

c++ qt linker-error vtable share|improve this question asked Jan 23 '11 at 14:24 Donotalo 7,167145993 marked as duplicate by djf, Rubens, Phil Hannent, tjameson, John Doyle Jul 13 '13 at 19:03 I would file a bug report with the Qt project. I don't see a problem with your constructor either. –Crazy Eddie Feb 1 '11 at 16:22 add a comment| 5 Answers 5 active oldest votes up vote 3 down vote accepted http://softacoustik.com/undefined-reference/linker-error-undefined-reference-vtable.php I belatedly thought to look at the moc files being generated.

I do run qmake many times before asking here. Qt Undefined Reference To Signal I encountered the same error a while ago. But there are no virtual methods in my class.

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Can I stop this homebrewed Lucky Coin ability from being exploited? You need to run moc on your .cpp files, and add e.g. #include "moc_myfile.cpp" to the end of myfile.cpp Alternatively, you have declared a virtual function (destructor perhaps) without defining it. I have no virtual functions declared, except one function inside QMainWindow (the class I'm inheriting from): virtual QMenu *createPopupMenu(); Should this be defined in my class? The Vtable Symbol May Be Undefined Because The Class Is Missing Its Key Function After running qMake once more, life was good again. –Alex Hendren Nov 6 '13 at 7:32 | show 2 more comments up vote 17 down vote If you want to define

J Log in to Reply Eric says: September 22, 2012 at 02:26 I still am getting errors even if I combine all .h and .cpp code into main.cpp. Is it correct to write "teoremo X statas, ke" in the sense of "theorem X states that"? share|improve this answer edited Feb 6 '15 at 21:40 answered Nov 7 '13 at 23:19 Iskar Jarak 2,90022145 add a comment| up vote 0 down vote Well, maybe automoc does not http://softacoustik.com/undefined-reference/linker-error-undefined-reference-to-vtable-for.php I'm quite sure you've heard the question before, and I'd like to ask for specific help as to how I should solve this, if possible.

share|improve this answer edited Nov 4 '13 at 5:14 answered Nov 4 '13 at 5:06 ypnos 29.4k861101 1) I definitely fully deleted the CMake cache. 2) Surely neither version Reply Darmawan says: June 21, 2010 at 07:10 Thanks for the hint. Previous company name is ISIS, how to list on CV? Just run qmake and you should be good to go assuming there are no other issues in your code.

Thank you! –Kyle Strand Nov 12 '15 at 0:36 @Kyle Strand Shouldn't set(CMAKE_AUTOMOC ON) be sufficient? Not the answer you're looking for? Nov 10 '15 at 15:06 qmake HelloWorldProj.pro –KernelPanic Nov 10 '15 at 15:07 you need a *.pro file and then run qmake on that, if you do So if you have a header which looks like this: #ifndef MESH_H #define MESH_H class Mesh { public: Mesh(); ~Mesh(); virtual void draw(); }; #endif // MESH_H You must at least

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