Qt Error Undefined Reference To Signal
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Undefined Reference To Vtable Qobject
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Undefined Reference To Staticmetaobject
hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow undefined reference to vtable for class is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up qt signal undefined reference error up vote 8 down vote favorite 3 I have a class server for which I have created a signal joined(QString name). I call it in q_object a function called join(QString name), however I'm getting the error Server.o: In function Server::join(QString)': Server.cpp:(.text+0x48): undefined reference to Server::joined(QString)' collect2: ld returned 1 exit status This is what my header file looks like: #ifndef SERVER_H #define SERVER_H #include
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Qt “signal undefined reference error” after http://stackoverflow.com/questions/13409343/qt-signal-undefined-reference-error inheriting from QObject up vote 5 down vote favorite 2 I recently needed to add a signal to a class, so I changed the class to inherit from QObject and added the Q_OBJECT macro into the class definition. Since doing so I get "signal undefined reference error for 'vtable for CLICommand'" error on the class line below: // File clicommand.h #include
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vtable" message from g++, and I have no idea why. I have one class which inherits from qwidget, defined like this: 1
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#ifndef FCRYPT #define FCRYPT #include "ui_fcrypt.h" class FCrypt : public QWidget, private Ui::FCrypt_window { Q_OBJECT public: FCrypt(QWidget *parent = 0); }; #endif and implemented like this (for the time being): 1
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#include "fcrypt.h" FCrypt::FCrypt(QWidget *parent) { setupUi(this); } This is the output from make: release/fcrypt.o:fcrypt.cpp:(.text+0x2b): undefined reference to `vtable for FCr ypt' release/fcrypt.o:fcrypt.cpp:(.text+0x32): undefined reference to `vtable for FCr ypt' release/fcrypt.o:fcrypt.cpp:(.text+0x8f): undefined reference to `vtable for FCr ypt' release/fcrypt.o:fcrypt.cpp:(.text+0x96): undefined reference to `vtable for FCr ypt' collect2: ld returned 1 exit status make[1]: *** [release\FCrypt.exe] Error 1 make[1]: Leaving directory `C:/Users/terry/Desktop/FCrypt' make: *** [release] Error 2 I've done this a dozen times before, but this is the first time I'm having this problem. Any ideas? Mar 4, 2011 at 2:00pm UTC simeonz (490) http://bytes.com/topic/c/answers/161894-undefined-reference-vtable#post623578 (When I get errors that I don't understand, I google them and in 99% of the cases something useful shows up in the first few hits. Just for future reference ;) Regards Mar 5, 2011 at 8:56am UTC fafner (377) Thanks, but that doesn't really answer the problem. The cause for the error in the question in your link was a missing implementation of a declared virtual method, but none of this is the case for me. Mar 5, 2011 at 9:19am UTC simeonz (490) No, that was not the idea. The cause is not missing implementation of a declared virtual method as you say, but the lack of translation unit (.cpp file) that implements at least one non-inline member function specifically for this class. If you think carefully, you will see that those are different things. The compiler needs this so that it can dete