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Linker Error Undefined Reference Vtable


Thanks! –Elliott Dec 2 '11 at 3:28 1 you my friend are a true hero! As mentioned by other answers, you need to also define the destructor: public: virtual ~IntInterval() { // Destruction code } share|improve this answer edited Jun 26 at 10:25 Peter Mortensen 10.3k1369107 A vtable error could mean that a library that is referenced is missing some of its dependencies or that these dependencies are not linked properly. 7. Farming after the apocalypse: chickens or giant cockroaches? navigate to this website

In fact OP said it turned out that this was exactly his problem. –M.M Aug 4 '15 at 23:46 12 upvotes?? After you separated/moved the implementation to .cpp, the header file now has just the prototypes of the member functions inside the class. What is the probability that they were born on different days? I was wondering if someone could shed some light on this issue, since in my understanding there shouldnt be a vtable for a class that doesnt use virtual functions. http://stackoverflow.com/questions/15154980/linker-error-undefined-reference-to-vtable

Error Undefined Reference To Vtable For Qt

What is the meaning of the so-called "pregnant chad"? share|improve this answer answered Aug 15 '14 at 14:57 Jerry Miller 45949 add a comment| up vote 0 down vote There are a lot of possibilities mentioned for causing this error, Join them; it only takes a minute: Sign up Undefined reference to vtable up vote 122 down vote favorite 17 So, I'm getting the infamously horrible "undefined reference to 'vtable..." error

All methods have matching parameters 3. 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 It's any unresolved method. Undefined Reference To `typeinfo For Can't a user change his session information to impersonate others?

asked 1 year ago viewed 86 times active 1 year ago Related 64GCC C++ Linker errors: Undefined reference to 'vtable for XXX', Undefined reference to 'ClassName::ClassName()'31Qt Linker Error: “undefined reference to The Vtable Symbol May Be Undefined Because The Class Is Missing Its Key Function And defining a virtual destructor in this derived class made no difference (it is defined in the base class). Published by Svenn-Arne Dragly I'm a physicist and programmer, writing about the stuff I figure out as I go. http://stackoverflow.com/questions/7720205/linking-error-undefined-reference-to-vtable-for-xxx Solution: Delete file from project, add the same class using "Add New...", "C++ Class".

As l2 resolves the BatchRead and BatchWrite dependencies but also adds two new ones (read and write). Undefined Reference To Vtable For Destructor This means a method in IBase is declared as virtual but we forgot to mark it as pure virtual OR provide its definition. Why did Fudge and the Weasleys come to the Leaky Cauldron in the PoA? What is a Waterfall Word™?

The Vtable Symbol May Be Undefined Because The Class Is Missing Its Key Function

But your tips didn't help in my case. a fantastic read Is it legal to bring board games (made of wood) to Australia? Error Undefined Reference To Vtable For Qt Turned out that I simply forgot to make one of the interface's methods pure virtual (i.e. Undefined Reference To Vtable For Constructor Thanks you saved my time and effort. –Haider Aug 28 '12 at 10:19 Interesting that in my case it happens with 'pure virtuals' only!

Thanks a lot Martin! –Jonathan May 24 '10 at 1:49 | show 11 more comments up vote 160 down vote This linker error usually (in my experience) means that you've overridden useful reference the errors occur at the contructor and destructor definitions. Is there a way to confirm the static libraries I am linking to are 64bit? How to find positive things in a code review? Undefined Reference To Vtable For C++

Better to define the functions, or remove them if he doesn't need them! –bdonlan Oct 11 '11 at 0:38 @bdonlan: Interval::~Interval is not Interval::Interval. If you are using Qt or a project with a Makefile, you could just run these three commands (the first only applies to Qt projects). C++ Class Name your class and choose QObject as base class Then rebuild your project, that should be fine. http://softacoustik.com/undefined-reference/linker-error-undefined-reference-to-vtable-for.php Omitting its implementation means you won't have a vtable, and thus won't be able to construct the class (hence these errors).

Dec 8 '15 at 22:28 this may be a different issue, but my problem was just not having an implementation for a non-virtual destructor (was switching to unique / Undefined Reference To Vtable Qobject Publishing a mathematical research article on research which is already done? Not the answer you're looking for?

I'm using MinGW with GCC and GNU-Make.

The problem was that I declared a virtual destructor in the header file, but the virtual functions' body was actually not implemented. share|improve this answer answered Nov 13 '12 at 22:19 scorpiodawg 2,87721836 add a comment| up vote -3 down vote In virtual classes never put undefined functions first. Is a food chain without plants plausible? Undefined Reference To Vtable For Class C++ The problems went away by correctly running the qt moc (meta object compiler) and compiling+including these moc-generated files correctly.

Are non-English speakers better protected from (international) phishing? If all else fails then one way to debug this error is to build minimal program that does compile and then keep changing it so it gets to the state you This way you can try find the problem in your code. get redirected here Binzxxxxxx Jan 19 '15 at 15:22 add a comment| up vote 9 down vote In regards to problems with Qt4, I couldn't use the qmake moc option mentioned above.