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Linker Error Undefined Reference To Vtable For


virtual void foo(Many params, As part, Of veryLong, Method signature); and theirs: virtual void foo(Many params, As part, Of veryLong, Method signature) const; When merging I picked the first version, but The inheritance chain is a little long, but here is the related source code. Why doesn't compiler report missing semicolon? stack curWorkingPos; //The actual Map that the data will be held in. navigate to this website

Would you like to answer one of these unanswered questions instead? All methods have matching parameters 3. 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 This it will need it for the constructor of Derived.

Error Undefined Reference To Vtable For Qt

Not the answer you're looking for? You could be on to something though. Just realized it's already mentioned above, but heck it might help someone. Move IntInterval(); to after the first defined function: private: unsigned long begin; unsigned long end; public: virtual Interval * interval_copy(){return new IntInterval(begin,end);} IntInterval(unsigned long a,unsigned long b): begin (a), end (b)

The compiler generates a direct call to the pure virtual function's implementation (which usually doesn't exist), and so the linker errors out. Polfer Jun 17 '10 at 20:00 1 I totally missed that the error message specifies a function. Apr 27, 2012 at 10:50pm UTC codekiddy (783) Try this, 1
// classes.h #ifndef CLASSES_H #define CLASSES_H #ifdef BUILDING_DLL #define DLL_INTERFACE __declspec(dllexport) #else #define DLL_INTERFACE __declspec(dllimport) #endif class DLL_INTERFACE baseClass { Undefined Reference To Vtable For C++ One final point: the destructor of a base class should usually either be virtual (to allow polymorphic deletion) or protected (to prevent invalid polymorphic deletion).

share|improve this answer answered Jun 21 '12 at 12:50 Sidharth Middela 111 strange. I looked for that online, yet still I couldn't find the problem. namespace Dasher { class CEvent; class CEventHandler; class CDasherComponent; }; /// \ingroup Core /// @{ class Dasher::CDasherComponent { public: CDasherComponent(Dasher::CEventHandler* pEventHandler, CSettingsStore* pSettingsStore); virtual ~CDasherComponent(); void InsertEvent(Dasher::CEvent * pEvent); virtual void The reason is because you have made some functions virtual without giving them any body.

Players Characters don't meet the fundamental requirements for campaign Why don't we construct a spin 1/4 spinor? Undefined Reference To `typeinfo For objdump reports that the TestBench vtable is among the unresolved externals in TestBench.o Log in to Reply Gianni Comoretto says: July 30, 2013 at 18:45 Resolved. Why doesn't compiler report missing semicolon? After the above changes, if you build your codebase you may get the "undefined reference to 'vtable..." error.

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

But what that entails i am not quite sure. http://stackoverflow.com/questions/7665190/undefined-reference-to-vtable-for-xxx 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 Error Undefined Reference To Vtable For Qt There are some cases where it's justified to leave out the definition for a declared function, but they are very rare. Undefined Reference To Vtable For Constructor The compiler can't error out, though, because technically you can have an implementation for the pure virtual in another translation unit... –bdonlan Oct 5 '11 at 19:07 add a comment| up

share|improve this answer answered Nov 8 '15 at 12:37 crw4096 1 add a comment| up vote 0 down vote It's also possible that you get a message like SomeClassToTest.host.o: In function useful reference asked 5 years ago viewed 23769 times active 3 months ago Visit Chat Related 158Undefined reference to static class member131g++ undefined reference to typeinfo64GCC C++ Linker errors: Undefined reference to 'vtable Good luck! Sometimes it might even be necessary to empty the build directory completely yourself to make sure there are no files left behind that are not cleaned by make clean. Undefined Reference To Vtable For Destructor

Is it correct to write "teoremo X statas, ke" in the sense of "theorem X states that"? Also it will update the map with all generated positions. Notice that you don't have to specify .hpp files anywhere in CMakeLists.txt. http://softacoustik.com/undefined-reference/linker-error-undefined-reference-vtable.php Spaced-out numbers How should I deal with a difficult group and a DM that doesn't help?

It does not know whether that function is implemented or not, so it can't generate an error at that stage. Undefined Reference To Vtable For Qobject When linker says "undefined reference to vtable for IBase" it basically means that Derived has vtable reference to IBase but it can't find any compiled object code of IBase to look Yinipar's first letter with low quality when zooming in Difficult limit problem involving sine and tangent 2002 research: speed of light slowing down?

My class looked like this: //----------------------------------------- // libbase.h class base { public: base() { } virtual ~base() { } virtual int foo() { return 0; } } //----------------------------------------- //----------------------------------------- // libbase.cpp

stack theData = initialData(initial); int first = theData.top(); theData.pop(); int second = theData.top(); theData.pop(); int initialData[] = {first,second}; vector posData(initialData,initialData+sizeof(initialData)); gamesMap[initial] = posData; curWorkingPos.push(initial); } /* Description: A destructor for the I'll add that detail to my original post. –RyanG Jun 17 '10 at 20:31 add a comment| 19 Answers 19 active oldest votes up vote 192 down vote The GCC FAQ share|improve this answer answered Mar 24 '14 at 17:36 sumeet 1 It actually has nothing to do with the constructor or destructor. Undefined Reference To Vtt For This fixed the issue for me.

Solution: Make function B as pure virtual (if you have requirement like that) virtual void functionB(parameters) =0; (This works it is Tested) Provide Definition for functionB in Class A itself keeping Compute the Eulerian number more hot questions default about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture Join them; it only takes a minute: Sign up Linking error: undefined reference to `vtable for XXX` up vote 11 down vote favorite 3 There is some linking error here. get redirected here 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?

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. Log in to Reply Rodrigo says: June 25, 2012 at 16:32 This may cause your problem:
class Mesh
virtual void I would have never found this bug if I didn't paste the constructors' bodies in the header file, thus defining them in-class. This resolved my problem too. –suvayu Oct 19 '11 at 0:16 2 Exactly the problem I was having.

Two possible solutions: Move the initialisation code for gameCore out of the constructor and into a separate initialisation function, which must be called after the object is fully constructed; or Separate Had this problem using g++ and cmake, with code that compiled fine in studio. –Nicolas Holthaus Sep 30 '14 at 18:06 add a comment| up vote 8 down vote I had Since there was no code using the virtual functions (yet), the compiler or linker neglected to put actual function bodies in place. Spaced-out numbers You can find me everywhere more hot questions question feed default about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback

Jul 25 '13 at 20:44 add a comment| 1 Answer 1 active oldest votes up vote 3 down vote accepted You also need to implement the declared event table using BEGIN_EVENT_TABLE/END_EVENT_TABLE What happens if one brings more than 10,000 USD with them into the US? Wardogs in Modern Combat How to decipher Powershell syntax for text formatting? share|improve this answer edited Sep 6 at 14:40 Flow 15k765106 answered Jul 7 '09 at 23:11 Loki Astari 158k44229408 Are you referring to the order of the lib files

Box around continued fraction Soft question: What exactly is a solver in optimization? 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 Does flooring the throttle while traveling at lower speeds increase fuel consumption? When you have virtual methods undeclared in an inherited class, the compiler will yield "undefined reference to `vtable for classname`", instead of "undefined reference to `classname::methodname`" Log in to Reply Joe

If a header is to be copied somewhere else, the build system should update the copy automatically as soon as the original is modified, and before any inclusion in another file. For example: class Base { virtual void method1(); // throws undefined reference error. } Change the above declaration to the below one, it will work fine. Not the answer you're looking for? I am 99% sure I'm linking to the correct library).

This means a method in IBase is declared as virtual but we forgot to mark it as pure virtual OR provide its definition.