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Undefined Reference To Vtable Qt Qobject


Which works fine with all buildsystems, be it qmake, cmake, ... –Frank Osterfeld May 2 '11 at 8:21 Thanks again, I seperated the .h, .cpp and main :mad: and It is likely the case that the OP must still run qmake but telling them to use a menu option which probably doesn't exist is not going to be helpful. –Styne666 Can Communism become a stable economic strategy? Join them; it only takes a minute: Sign up Q_OBJECT throwing 'undefined reference to vtable' error [duplicate] up vote 40 down vote favorite 15 This question already has an answer here: http://smartphpstatistics.com/undefined-reference/error-undefined-reference-to-vtable-for-qt.html

and the corresponding cpp file defines ALL the methods in the class template. thnx!!!! See my answer for details. –Troubadour Jan 23 '11 at 15:49 "Add QT += gui in your pro file" this just save me. Reply Gary S. http://stackoverflow.com/questions/14010922/qt-undefined-reference-to-vtable

Error Undefined Reference To Vtable Qt

I've also cleaned the environment. This way you can try find the problem in your code. The moc compiler generates the stubs and calls in moc_xxxx.cpp, and generates the vtable stuff share|improve this answer answered Dec 29 '12 at 21:35 sylvain 19112 I don't use Reply Darmawan says: June 21, 2010 at 07:10 Thanks for the hint.

How? Developing web applications for long lifespan (20+ years) With the passing of Thai King Bhumibol, are there any customs/etiquette as a traveler I should be aware of? I suggest you look at the tutorials in Qt 4.7 documentation. –ypnos May 2 '11 at 8:11 @ypnos thanks but the tut on 4.7 doesn't show any "running" example, Undefined Reference To Signal Qt Is it "eĉ ne" or "ne eĉ"?

LINK = g++ LFLAGS = -Wl,-O1 -Wl,-rpath,$(QT_LIB) LIBS = $(SUBLIBS) -L$(QT_LIB) -lQtGui -L$(QT_LIB) -L/usr/X11R6/lib -lQtCore -lpthread AR = ar cqs RANLIB = QMAKE = $(QT_QMAKE)qmake TAR = tar -cf COMPRESS = If you have inherited classes, make sure that all virtual functions are implemented (this shouldn't lead to vtable errors, but is worth checking) 5. Qt Centre is a community site devoted to programming in C++ using the Qt framework. Somewhat Generalized Mean Value Theorem Why does the material for space elevators have to be really strong?

share|improve this answer edited Dec 30 '13 at 16:04 Benjamin 11.4k1693171 answered Nov 7 '11 at 13:03 agus 111 add a comment| up vote 0 down vote Go to .pro file Undefined Reference To Staticmetaobject Simply editing the file did not work for me though. HEADERS = AddressBook.h share|improve this answer answered Oct 12 '09 at 2:18 Jeremy Friesner 26.4k756116 Actual answer to this question, without platform/ide specific discussions or causes,clear and usable. In my case, I changed: struct FUN { virtual double operator()(double x, double y) const ; }; to struct FUN { virtual double operator()(double x, double y) const = 0; };

Undefined Reference To Vtable Qt Cmake

You will need to re-run qmake of course so that the appropriate rule to run moc gets added to the Makefile. https://forum.qt.io/topic/11994/solved-error-undefined-reference-to-vtable-for-myclass How does the 11-year solar cycle alter the cosmic ray flux? Error Undefined Reference To Vtable Qt share|improve this answer answered Apr 19 '15 at 20:58 Alex Petrenko 1,93611944 add a comment| up vote -1 down vote I am using Qt creator to compile and run my programs, Qt Undefined Reference To Vtable For Constructor Reply Dan says: March 11, 2011 at 06:54 Thank you!

Reply Tom says: March 4, 2011 at 16:36 Thanks. http://smartphpstatistics.com/undefined-reference/undefined-reference-to-vtable-for-destructor.html Can I tile my shower in stages on different days? The solution was to manually delete the make file. Browse other questions tagged c++ qt linker-error vtable or ask your own question. Qt Undefined Reference To Function

Just for future reference ;) Regards Mar 5, 2011 at 8:56am UTC fafner (377) Thanks, but that doesn't really answer the problem. it fixed the problem! –Donotalo Jan 24 '11 at 14:50 3 Spot on answer - covered my case where the object did not originally belong to the Qt meta object Edit: I see you are using Creator. http://smartphpstatistics.com/undefined-reference/undefined-reference-to-vtable-for-constructor.html MX record security Can Communism become a stable economic strategy?

It makes perfect sense if the OP is using Qt Creator, but the OP only states Code::Blocks. Undefined Reference To Vtable For Class Qobject So actual credit to Troubadour and serge_gubenko share|improve this answer answered Jan 23 '11 at 21:14 Tuukka Lindroos 997512 For me this helped, because QObject must be at first Had the same issue and fighted for a while to find where it comes from.

Run qmake -project in the project directory, and qmake will scan your directory for all C++ headers and source files to generate moc cpp files for.

share|improve this answer answered Dec 23 '12 at 17:51 RTOSkit 93611021 add a comment| up vote 8 down vote MOC(meta object compiler) needs to know of your communicate.h (as well as current community chat Stack Overflow Meta Stack Overflow your communities Sign up or log in to customize your list. Or maybe it isn't generated at all. Error: Undefined Reference To `vtable For I had to do what the referred-to comment suggests. –Tshepang Oct 24 '12 at 7:48 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign

Traps in the Owen's opening What does a well diversified self-managed investment portfolio look like? Reply Anjanu Sonkar says: July 17, 2011 at 02:59 Thanks brother…rerunning qmake worked for me too…🙂 Reply Sunil says: May 5, 2010 at 17:22 If the Q_OBJECT macro is added to The class was defined in a separate header file, and all headers were correctly included in the HEADERS project variable. Check This Out This macro is define in qobjectdefs.h in the QtCore module and simply adds virtual function declarations to your class declaration.

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 I'm using Qt Creator 2.0.1 Hope this helps someone some day. 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 How to retrieve GET parameter in Twig template Why do many statues in Volantis lack heads?

Thanks. I cant find any .pro file with the project directory...can u be more specific please? –Jijo Jose Dec 24 '12 at 2:07 @Zeks yes you're right, Qt needs to Reply Mike says: September 29, 2011 at 11:03 or else, using Kdevelop4 type: make rebuild_cache and make all Reply Claus Wimmer says: December 30, 2011 at 15:16 I had found the How?

Is there a role with more responsibility? 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. Saves you some time there. Published by Svenn-Arne Dragly I'm a physicist and programmer, writing about the stuff I figure out as I go.

The reason is because you have made some functions virtual without giving them any body. One thing I did to get rid of the annoying error "vtable something something" is by adding the following lines to .pro file. Also, you can use QGraphicsObject for your purpose. Did you try clean and rebuild? –Sergey Tachenov Jan 23 '11 at 15:09 @Donotalo, also see my edit. –Sergey Tachenov Jan 23 '11 at 15:16 1 thanks for

Reply Pingback: Qt : undefined reference to vtable for … - 30 minutes par jour Leave a Reply Cancel reply Enter your comment here... You may have to register before you can post: click the register link above to proceed. If you have installed QtCreator deserves support of self-generated by QtCreator file, and with a little experience can build your own files. ps: run 'make' from command line may give you detail information than the IDE, and helpful to get the real problem.

The moc creates the code for the functions defined by Q_OBJECT and everything works fine. How should I interpret "English is poor" review when I used a language check service before submission?