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Linker Error Undefined Reference To Vtable For Class

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I looked for that online, yet still I couldn't find the problem. I was adding the correct files to my Makefile.am template, but I wasn't sure which step in our build process actually created the makefile itself. A class containing virtual function must also implement a constructor and a (virtual) destructor. share|improve this answer edited Jun 18 '10 at 21:15 answered Jun 17 '10 at 20:06 Alexandre Hamez 3,13421528 7 nm -C CGameModule.o | grep CGameModule:: will list the methods that navigate to this website

Please click the link in the confirmation email to activate your subscription. What are the legal and ethical implications of "padding" pay with extra hours to compensate for unpaid work? The vtable is there. Like void Machine::menu() { // Code for this method } Etc. you could try here

Error Undefined Reference To Vtable For Qt

Also make sure you change your makefile to accomodate/add the new .o file that is built from the new .cpp file you just created. What are the legal consequences for a tourist who runs out of gas on the Autobahn? No new replies allowed. Apr 28, 2012 at 11:32am UTC Torin (38) @clanmjc Okay, that makes sense.

The problem was that I declared a virtual destructor in the header file, but the virtual functions' body was actually not implemented. more hot questions question feed default about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation Alpers 261 This is a linker error. Undefined Reference To Vtable Qobject The class's header must be HEADER for moc to pick up Q_OBJECT. –vpicaver Jun 20 at 12:51 | show 1 more comment up vote 14 down vote The problem for me

Now you have decided to separate the implementation of the member functions to to .cpp file. The Vtable Symbol May Be Undefined Because The Class Is Missing Its Key Function I keep getting a vtable linker error for a class that doesnt involve any virtual functions. In my case, there was another definition of the same class, due to a duplication of the source file. you could check here I have a QT4 class: class TestBench : public QMainWindow { Q_OBJECT public: TestBench(QWidget *parent = 0); ~TestBench(); Ui::testBenchForm ui; public slots: void Start(); void Abort(); ….

class CDasherModule; typedef std::vector::size_type ModuleID_t; /// \ingroup Core /// @{ class CDasherModule : public Dasher::CDasherComponent { public: CDasherModule(Dasher::CEventHandler * pEventHandler, CSettingsStore * pSettingsStore, ModuleID_t iID, int iType, const char *szName); virtual Undefined Reference To `typeinfo For Code Polygon.h/.cpp #ifndef POLYGON_H #define POLYGON_H #include "Shape.h" #include "vector3f.h" class Polygon { public: Polygon(); virtual void Collide(Shape &s) = 0; virtual void Collide(Polygon &p) = 0; virtual bool Intersects(const Shape class Base { virtual void method1() { } } share|improve this answer edited May 13 '13 at 6:32 Lundin 59.9k1186157 answered May 13 '13 at 6:15 user2376546 5111 This The MOC file was not generated by qmake.

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

When does bugfixing become overkill, if ever? http://stackoverflow.com/questions/17865440/linker-error-undefined-reference-to-vtable All methods in your classes are both defined in the headers (.h) and the source files (.cpp) 2. Error Undefined Reference To Vtable For Qt He's missing definitions for several virtual functions, so even if you managed to get G++ to emit a vtable, the vtable itself will cause more link errors for the undefined virtuals. Undefined Reference To Vtable For Constructor more hot questions question feed lang-cpp about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation

This header file is an exported header (in other words, it might be copied to some common/include directly in your codebase). useful reference share|improve this answer edited Jul 1 '15 at 16:18 Hugo Alonso 2,9741134 answered Jul 1 '15 at 14:55 Philip Thomas 7111 add a comment| up vote 6 down vote The GNU E.g. I tried to fix it with many of the options given here but could not. Undefined Reference To Vtable For C++

you are right... All classes are in a same file for a pilot program. #include #include #include using namespace std; #define MAX_IP_RANGE 4294967295 class Interval { public: virtual Interval * interval_copy() How exactly std::string_view is faster than const std::string&? http://softacoustik.com/undefined-reference/linker-error-undefined-reference-vtable.php What is a Peruvian Word™?

I get the error message “undefined reference to `vtable for …” although the .h and .cpp files are synchronized and checked. Undefined Reference To Vtable For Destructor It compiles, but the resulting library is missing necessary references 1 Strange error message when a class method is missing 0 Should the order of linked libraries make a difference in Why you failed to provide them is another story. –Walter May 29 '14 at 8:22 6 @Walter: Actually this was the exact answer I was looking for.

I'm sure you saved me hours of frustration!

Just delete the complete debug and release folder. Topic archived. Name spelling on publications C++ delete a pointer (free memory) How to unlink (remove) the special hardlink "." created for a folder? Undefined Reference To Vtable For Class C++ What does Differential Geometry lack in order to "become Relativity" - References Why do people move their cameras in a square motion?

more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed Running qmake -r will call moc and fix this problem. Note: The constructor is where this error is happening, it'd seem. http://softacoustik.com/undefined-reference/linker-error-undefined-reference-to-vtable-for.php Make an ASCII bat fly around an ASCII moon When does bugfixing become overkill, if ever?

You have saved my life. I'll add your solution to the blog post. When you use the class, you get the linker error. It's definitely not here - the question is if it is in the .cc file.

For something that should have been a comment? –Mawg Sep 17 '15 at 9:08 add a comment| up vote 19 down vote If you are using Qt, try rerunning qmake. That got rid of the vtable error for the Polygon class. Browse other questions tagged c++ linker-error vtable undefined-reference or ask your own question. g++ test.cpp -o test /tmp/ccDfCj4N.o: In function `Interval::Interval()': test.cpp:(.text._ZN8IntervalC2Ev[Interval::Interval()]+0x9): undefined reference to `vtable for Interval' /tmp/ccDfCj4N.o: In function `IntInterval::~IntInterval()': test.cpp:(.text._ZN11IntIntervalD0Ev[IntInterval::~IntInterval()]+0x1d): undefined reference to `Interval::~Interval()' /tmp/ccDfCj4N.o: In function `IntInterval::~IntInterval()': test.cpp:(.text._ZN11IntIntervalD1Ev[IntInterval::~IntInterval()]+0x1d): undefined reference

What does Differential Geometry lack in order to "become Relativity" - References Publishing a mathematical research article on research which is already done? and the corresponding cpp file defines ALL the methods in the class template. What examples are there of funny connected waypoint names or airways that tell a story? I kept believing I had all methods as pure abstract while one method hiding out.

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. share|improve this answer edited Jan 9 '12 at 8:10 answered Jan 9 '12 at 7:55 lukeinchina 8113 add a comment| up vote 5 down vote This error will also occur when Red balls and Rings Why won't a series converge if the limit of the sequence is 0? This way you can try find the problem in your code.

If you put two blocks of an element together, why don't they bond? more hot questions lang-cpp about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation Science Other Thanks for the responses and the link to the GCC FAQ. In between, keep compiling to see when it starts to fail.

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 My groupproject suddenly stopped accepting new cpp files from one of my libs, it was all about undefined reference, then I switched positions and it worked as a charm. I have a simple Square class, which, originally I was trying to inherit from a Polygon class.