Home > Undefined Reference > Linking Error Undefined Reference To Vtable

Linking Error Undefined Reference To Vtable

Contents

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. What does a profile's Decay Rate actually do? I hope this helps someone out there.... note: the microsoft compiler (as well as several other compilers) does not require this; it instantiates a v-table with internal linkage in *every* translation unit in which such a header (all http://cdbug.org/undefined-reference/linker-error-undefined-reference-to-vtable.php

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 What examples are there of funny connected waypoint names or airways that tell a story? White Jul 7 '09 at 23:06 Yes, it is 64bit. Join them; it only takes a minute: Sign up Linker Error: Undefined Reference to `vtable for square` up vote 0 down vote favorite 1 I've checked the most common undefined reference

Error Undefined Reference To Vtable For Qt

share|improve this answer answered Aug 18 '14 at 1:24 Victor Häggqvist 2,83231325 add a comment| up vote 2 down vote Not perhaps. Not the answer you're looking for? main.cpp { #include #include #include "headerMachine.h" using namespace std; int main(int argc, char *argv[]) { Machine machineCall; Movies moviesCall; machineCall.menu(); moviesCall.chooseMovie(); system("pause"); return 0; } header.h #include #include Defining testFunc in the base class did it: 1
2
3
4
5
6
class DLL_INTERFACE baseClass { public: virtual void testFunc() {}; virtual ~baseClass() {}; }; As you can see, I also took your advice

The problem was that I declared a virtual destructor in the header fileļ¼Œ but the virtual functions' body was actually not implemented. I removed the inline effect of the derived class destructor, made that into a method definition in the cpp file and presto, compilation succeeded. How to deal with a coworker who is making fun of my work? Undefined Reference To Vtable Qobject Also, this makes a lot more sense to me after reading this, which I just found after some searching: http://gcc.gnu.org/faq.html#vtables Thanks again.

At my first method definition, a default constructor, the compiler kept spitting out this error message: The line number was pointing to my derived class constructor definition. Related 64GCC C++ Linker errors: Undefined reference to 'vtable for XXX', Undefined reference to 'ClassName::ClassName()'30Linker error: “linker input file unused because linking not done”, undefined reference to a function in that In it, you'll get: The week's top questions and answers Important community announcements Questions that need answers see an example newsletter By subscribing, you agree to the privacy policy and terms http://stackoverflow.com/questions/8830025/linker-error-undefined-reference-to-vtable-for-square Public huts to stay overnight around UK Is there a mutual or positive way to say "Give me an inch and I'll take a mile"?

all virtual methods should be defined. Undefined Reference To `typeinfo For I had a protection in Norway with Geneva book Is there a word for spear-like? I am 99% sure I'm linking to the correct library). Polfer Jun 17 '10 at 20:00 1 I totally missed that the error message specifies a function.

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

Is there a word for spear-like? find this 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 Error Undefined Reference To Vtable For Qt Like void Machine::menu() { // Code for this method } Etc. Undefined Reference To Vtable For Constructor I get a "undefined reference to vtable for TestBench" on all these methods, in the .o file that obviously has been linked in.

The MOC file was not generated by qmake. More about the author It happens to be the constructor, so I saw my class name and didn't make the connection. These causes doesn't seem to be true. 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, Undefined Reference To Vtable For C++

fourSided::fourSided() { this -> y = 0; this -> width = 0; this -> height = 0; this -> color = BLACK; this -> point = Point( x, y ); this Comments superjacent: To the point and relevant advice, thank you. 0 Discussion Starter superjacent 1 8 Years Ago Thank you very much, this has certainly cleared things up. Note that you are probably should define all the functions in your header. http://cdbug.org/undefined-reference/linker-error-undefined-reference-vtable.php If you are working with others via some sort of version control, you will want to make some change to your .pro file (ie add/remove a blank line).

When is it okay to exceed the absolute maximum rating on a part? Undefined Reference To Vtable For Destructor Difficult limit problem involving sine and tangent Just a little change and we're talking physical education Publishing a mathematical research article on research which is already done? When you do these steps the compiler/linker will no longer complain.

Not the answer you're looking for?

How to decipher Powershell syntax for text formatting? I'm sure you saved me hours of frustration! Note: The constructor is where this error is happening, it'd seem. Undefined Reference To Vtable For Class C++ 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

Log in to Reply Svenn-Arne Dragly says: May 11, 2012 at 00:23 Hi Teymoor, vtable errors are sometimes tricky to figure out. Make sure they're all there and see if the result changes. –Stephen Jun 17 '10 at 21:00 add a comment| up vote 2 down vote Not to cross post but. 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 news The application defined a pure virtual interface class and a user-defined class provided through a shared lib was supposed to implement the interface.

If so load required part into the executable. You can now reproduce the error by removing = 0 in IBase.hpp. The code isn't too long, I'll post it below. The class files (.cpp, .h) were in the project folder, and i was editing the files, etc...

How it works: Take all the object files and combine them into an executable Resolve any dependencies among object files. share|improve this answer edited May 7 '15 at 9:03 answered Jan 12 '15 at 22:43 gluk47 791624 saved me some time! +1 –Martin Hennig Dec 9 '15 at 14:23 Kio estas la diferenco inter scivola kaj scivolema? Most similar topics I've seen occur when someone forgets the define the deconstructor, but I'm pretty sure the deconstructor was correctly defined.

Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count). I was merging my code with upstream changes and picked my change over another engineer's seemingly identical change in the header file. C++ Information Tutorials Reference Articles Forum Forum BeginnersWindows ProgrammingUNIX/Linux ProgrammingGeneral C++ ProgrammingLoungeJobs Home page | Privacy policy© cplusplus.com, 2000-2016 - All rights reserved - v3.1Spotted an error? Log in to Reply Leave a Reply Cancel replyYou must be logged in to post a comment.

gcc has a faq about this: http://gcc.gnu.org/faq.html#vtables > Am I to assume that the example in the book, as regards the inline feature > of a derived class destructor, is in c++ Steve superjacent 1 66 posts since Nov 2007 Community Member 10Contributors 10Replies 20Views 8 YearsDiscussion Span 6 Years Ago Last Post by sheldonrobinson 1 Featured Reply vijayan121 1,152 8 Years functionB is defined as virtual (NOT PURE VIRTUAL) so it tries to find its definition in Class A itself but you provided its definition in Class B. The Noble, or Old Velvet, etc.

But that wasn't the problem anyway.