Qt-interest Archive, July 2007
Re: 'Undefined reference to vtable' when inheriting from QObject
Message 1 in thread
Thanks Jean,
Deleting all the makefiles did the trick. Thanks!
... and thanks to everyone else who replied too.
Kind rgds,
Dec
On Saturday 30 June 2007 00:00, Jean Collonville wrote:
> If you are using qmake sometimes you have to delete all your Makefiles
> and regenerate them to get your new header file moc'ed
>
> On Fri, 2007-06-29 at 17:22 +0530, vidyadhara.talya@xxxxxxxxx wrote:
> > Have you declared the destructor and defined it even though it is empty
> > ? Some times the vtable corruption happens if the destructor is declared
> > and not defined.
> >
> > Regards
> > Vidya.
> >
> > -----Original Message-----
> > From: Malte Witt [mailto:malte.witt@xxxxxxxxxxxxx]
> > Sent: Friday, June 29, 2007 4:42 PM
> > To: qt-interest@xxxxxxxxxxxxx
> > Subject: Re: 'Undefined reference to vtable' when inheriting from
> > QObject
> >
> > Are you sure, you are moc'ing your header files?
> > Are you using qmake to build your Makefiles?
> >
> > Usually this linker message happens whenever you forget to include the
> > Q_OBJECT-Macro or you forget to moc your header files.
> >
> > Regards,
> > Malte
> >
> >
> >
> > Declan McGrath <declanmcgrath@xxxxxxxxxxxx> schrieb am 29.06.2007
> >
> > 13:08:18:
> > > Hi folks,
> > >
> > > Just trying to create a simple class called Browser composed of a
> > > QTextBrowser and a JsDomDocument (JsDomDocument inherits from
> > > QDomDocument).
> > >
> > > Why would I be getting the following "undefined reference to vtable
> > > for Browser" error? I have the constructor in the .cpp file correctly
> >
> > declared in
> >
> > > hte .h file - I think???
> > >
> > > Thanks for any help,
> > > Dec
> >
> > /mnt/extra/BackedUp/Projects/Subverted/frogface/trunk/src/browser.cpp:38
> >
> > > undefined reference to `vtable for Browser'
> >
> > /mnt/extra/BackedUp/Projects/Subverted/frogface/trunk/src/browser.cpp:38
> >
> > > undefined reference to `vtable for Browser'
> >
> > /mnt/extra/BackedUp/Projects/Subverted/frogface/trunk/src/browser.cpp:38
> >
> > > undefined reference to `vtable for Browser'
> > > browser.o: In function `Browser':
> >
> > /mnt/extra/BackedUp/Projects/Subverted/frogface/trunk/src/browser.cpp:34
> >
> > > undefined reference to `vtable for Browser'
> >
> > /mnt/extra/BackedUp/Projects/Subverted/frogface/trunk/src/browser.cpp:34
> >
> > > undefined reference to `vtable for Browser'
> > > collect2: ld returned 1 exit status
> > > gmake[1]: *** [../bin/frogface] Error 1
> > > gmake: *** [sub-src-make_default] Error 2
> > > *** Exited with status: 2 ***
> > >
> > >
> > > *******************************************************************
> > > browser.h
> > > *******************************************************************
> > > #ifndef BROWSER_H
> > > #define BROWSER_H
> > >
> > > #include <QTextBrowser>;
> > > #include "jsdomdocument.h";
> > > #include <QObject>
> > > /**
> > > @author Declan McGrath <declanmcgrath@xxxxxxxxxxxx> */ class
> > > Browser : public QObject { Q_OBJECT
> > >
> > > private:
> > > QTextBrowser& m_textBrowser;
> > > JsDomDocument m_domDoc;
> > >
> > > public:
> > > Browser(QTextBrowser& textBrowser, QObject* parent = 0);
> > > ~Browser();
> > >
> > > public slots:
> > > JsDomDocument document()
> > > { return m_domDoc; };
> > >
> > > void setXHtml(const QString& xhtml);
> > > QString toXHtml() const;
> > > };
> > >
> > > #endif
> > >
> > > *******************************************************************
> > > browser.cpp
> > > *******************************************************************
> > > #include "browser.h"
> > >
> > > Browser::Browser(QTextBrowser& textBrowser, QObject* parent /*= 0*/)
> > >
> > > m_textBrowser(textBrowser),
> > > QObject(parent)
> > > {
> > > }
> > >
> > > Browser::~Browser()
> > > {
> > > }
> > >
> > > void Browser::setXHtml(const QString& xhtml) {
> > > m_domDoc.setContent(xhtml);
> > > m_textBrowser.setHtml(this->toXHtml());
> > > }
> > >
> > > QString Browser::toXHtml() const
> > > {
> > > return m_domDoc.toString(2);
> > > }
> > >
> > > --
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