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It was fixed when the =0 was added. I think I'm doing something wrong with constructors, but I'm not sure what. Perhaps this is required for some frameworks or is just now defunct? –Ben Dec 2 '10 at 10:09 add a comment| up vote 1 down vote You're just compiling BasicMath.cpp without he doesn't need to define functions he doesn't use. –Dani Oct 11 '11 at 0:37 yes, and it would be replaced with undefined reference to Interval::~Interval. check over here

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 Not the answer you're looking for? The base class defined a pure virtual function as: virtual int foo(int x = 0); And the subclass had int foo(int x) override; The problem was the typo that the "=0" White Jul 7 '09 at 23:11 The third party lib files are here: /home/notroot/workspace/somelib-3/somelib/target/bin –Alex Black Jul 7 '09 at 23:13 | show 4 more comments 12 Answers 12

Error Undefined Reference To Vtable For Qt

In my case, there was another definition of the same class, due to a duplication of the source file. Start from the bottom and build up everything again piece by piece, if possible. Success! All methods have matching parameters 3.

Log in to Reply Svenn-Arne Dragly says: July 30, 2013 at 23:47 Glad to hear you figured it out. Is there a way to confirm that the library has the class (and methods) I am expecting it to have? How to fix a bent lens mount hook? Undefined Reference To Vtable For C++ 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

Output a googol copies of a string Development of retrosynthesis plan more hot questions question feed lang-cpp about us tour help blog chat data legal privacy policy work here advertising info Undefined Reference To Vtable For Constructor This file was compiled, but not linked, so the linker was complaining about being unable to find it. class MissionController: public CCNode { public: MissionController(); virtual ~MissionController(); }; Is it some public framework, where can we see CCNode class definition? Please help me to resolve this.

Why do the Sparkfun and Adafruit Eagle libraries use smaller footprints than the manufacturer's recommended land pattern? Undefined Reference To Vtt I get this error: ~/.../catkin_ws$ g++ -std=c++11 -o /tmp/m.out /tmp/myclass.cpp /tmp/Derived.cpp /tmp/cclLscB9.o: In function `IBase::IBase(IBase const&)': myclass.cpp:(.text._ZN5IBaseC2ERKS_[_ZN5IBaseC5ERKS_]+0x13): undefined reference to `vtable for IBase' /tmp/cc8Smvhm.o: In function `IBase::IBase()': Derived.cpp:(.text._ZN5IBaseC2Ev[_ZN5IBaseC5Ev]+0xf): undefined reference to I'm having trouble linking the class that uses these implementations. ==> BasicMath.h <== #ifndef BASIC_MATH_H #define BASIC_MATH_H #include #include class BasicMath { }; #endif // BASIC_MATH_H ==> Operation.h <== #ifndef OPERATION I'll work on that next now I'm past this error.

  1. this helped me resolve the same issue. –IAbstract Apr 7 '15 at 21:23 The second code block isn't "implementing the (empty) destructor" as you say, that's implementing the constructor.
  2. Join them; it only takes a minute: Sign up c++ a missing vtable error up vote 9 down vote favorite 2 I am getting a really weird error related to missing
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Undefined Reference To Vtable For Constructor

inspect the .a files with a tool or something? –Alex Black Jul 7 '09 at 23:08 Where is it located? http://stackoverflow.com/questions/1095298/gcc-c-linker-errors-undefined-reference-to-vtable-for-xxx-undefined-refere What to do when majority of the students do not bother to do peer grading assignment? Error Undefined Reference To Vtable For Qt share|improve this answer answered Nov 24 '10 at 23:46 Jerry Coffin 322k31354750 Hi Jerry - I added the guards in my source after reviewing some of the ACE code, The Vtable Symbol May Be Undefined Because The Class Is Missing Its Key Function Join them; it only takes a minute: Sign up GCC C++ Linker errors: Undefined reference to 'vtable for XXX', Undefined reference to 'ClassName::ClassName()' up vote 64 down vote favorite 27 I'm

Log in to Reply Rodrigo says: June 25, 2012 at 16:32 This may cause your problem:
class Mesh
{
public:
Mesh();
~Mesh();
virtual void http://centralpedia.com/undefined-reference/undefined-reference-gcc-error.html View all posts by Svenn-Arne Dragly Posted on January 3, 2010September 18, 2014Author Svenn-Arne DraglyCategories C++, Programming, Qt, TechnicalTags C++, cplusplus, errors, Programming 16 thoughts on “Fixing "undefined reference to `vtable Browse other questions tagged c++ wxwidgets linker-error vtable or ask your own question. Enable Wireless on Fresh Debian Build "Squeezing out of a dead man" proverb Die Liebe höret nimmer auf Why does Deep Space Nine spin? Undefined Reference To Vtable For Destructor

referenced from compile error xcode or maybe http://www.parashift.com/c++-faq-lite/link-errs-missing-vtable.html for more help. Not the answer you're looking for? thanks –wanderameise Jan 30 '14 at 17:00 1 Also, if you forget to add the class to the *.pro file's HEADER's section you'll get the same error. this content Very rudimentary, still easy to overlook and puzzling if you can't connect the linker diagnostic to the root cause.

its dtor is virtual because it is virtual in wxWindow. –VZ. Undefined Reference To Vtable For Class share|improve this answer answered Aug 18 '14 at 1:24 Victor Häggqvist 2,87231425 add a comment| up vote 2 down vote Not perhaps. This way you can try find the problem in your code.

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What was the first operating system to feature a separate kernel? In Visual Studio I created a x64 build config. –Alex Black Jul 7 '09 at 23:07 1 Is there a way to confirm the 3rd party library is 64bit? Join them; it only takes a minute: Sign up Linker Error undefined reference to vtable up vote 2 down vote favorite I seem to be having an issue with a wxWidgets Undefined Reference To Vtable Qobject Apr 27, 2012 at 11:30pm UTC clanmjc (666) If you do not declare the base class destructor as virtual, then derived classes that need to free resources in their destructors will

In my main code where I derived from this class, the linker tried to connect my class to the base class and his vtable. I'll add that detail to my original post. –RyanG Jun 17 '10 at 20:31 add a comment| 20 Answers 20 active oldest votes up vote 193 down vote The GCC FAQ 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() have a peek at these guys When everyone else gets your changes and runs make, make will see that the .pro file has changed and automatically run qmake.

Is there a way to confirm the static libraries I am linking to are 64bit? asked 3 years ago viewed 4840 times active 3 years ago Linked 725 What is an undefined reference/unresolved external symbol error and how do I fix it? 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. Related 64GCC C++ Linker errors: Undefined reference to 'vtable for XXX', Undefined reference to 'ClassName::ClassName()'1g++ linker error--typeinfo, but not vtable33static variable link error0Allocating an object for abstact class type if not

So, I was compiling with an old makefile that had no idea about my new files whatsoever. share|improve this answer edited Mar 1 '13 at 11:11 answered Mar 1 '13 at 10:02 Some programmer dude 213k16146256 thanks for your fast reply! The problems went away by correctly running the qt moc (meta object compiler) and compiling+including these moc-generated files correctly. Eclipse says: Building target: LinkProblem Invoking: GCC C++ Linker g++ -L/home/notroot/workspace/somelib-3/somelib/target/bin -o"LinkProblem" ./src/LinkProblem.o -lsomelib1 -lpthread -lsomelib2 -lsomelib3 ./src/LinkProblem.o: In function `main': /home/notroot/workspace/LinkProblem/Debug/../src/LinkProblem.cpp:17: undefined reference to `SomeClass::close()' ./src/LinkProblem.o: In function `SomeOtherClass': /home/notroot/workspace/somelib-3/somelib/include/sql/somefile.h:148:

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