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POundefined reference to `vtable for DigitalClock' - undefined reference to `DigitalClock::staticMetaObject' - Qt
 

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  1. POundefined reference to `vtable for DigitalClock' - undefined reference to `DigitalClock::staticMetaObject' - Qt
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    <pre><code>anisha@linux-dopx:~/Desktop/notes/pomodoro&gt; ls timer.cpp anisha@linux-dopx:~/Desktop/notes/pomodoro&gt; qmake -project anisha@linux-dopx:~/Desktop/notes/pomodoro&gt; qmake anisha@linux-dopx:~/Desktop/notes/pomodoro&gt; make g++ -c -m64 -pipe -O2 -Wall -W -D_REENTRANT -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I../../../qtsdk-2010.05/qt/mkspecs/linux-g++-64 -I. -I../../../qtsdk-2010.05/qt/include/QtCore -I../../../qtsdk-2010.05/qt/include/QtGui -I../../../qtsdk-2010.05/qt/include -I. -I. -o timer.o timer.cpp g++ -m64 -Wl,-O1 -Wl,-rpath,/home/anisha/qtsdk-2010.05/qt/lib -o pomodoro timer.o -L/home/anisha/qtsdk-2010.05/qt/lib -lQtGui -L/home/anisha/qtsdk-2010.05/qt/lib -L/usr/X11R6/lib64 -lQtCore -lpthread timer.o: In function `DigitalClock::DigitalClock(QWidget*)': timer.cpp:(.text+0x151): undefined reference to `vtable for DigitalClock' timer.cpp:(.text+0x159): undefined reference to `vtable for DigitalClock' timer.cpp:(.text+0x1bc): undefined reference to `DigitalClock::staticMetaObject' timer.o: In function `main': timer.cpp:(.text+0x2c0): undefined reference to `vtable for DigitalClock' timer.cpp:(.text+0x2c9): undefined reference to `vtable for DigitalClock' timer.cpp:(.text+0x30f): undefined reference to `vtable for DigitalClock' timer.cpp:(.text+0x318): undefined reference to `vtable for DigitalClock' collect2: ld returned 1 exit status make: *** [pomodoro] Error 1 </code></pre> <p>My pomodoro.pro:</p> <pre><code>###################################################################### # Automatically generated by qmake (2.01a) Tue Feb 14 10:32:09 2012 ###################################################################### TEMPLATE = app TARGET = timer DEPENDPATH += . INCLUDEPATH += . # Input SOURCES += timer.cpp </code></pre> <p>My timer.cpp:</p> <pre><code>#include &lt;QLCDNumber&gt; #include &lt;QtGui&gt; #include &lt;QApplication&gt; class DigitalClock : public QLCDNumber { Q_OBJECT public: DigitalClock (QWidget *parent = 0); private slots: void showTime(); }; DigitalClock :: DigitalClock (QWidget *parent) : QLCDNumber (parent) { setSegmentStyle(Filled); QTimer *timer = new QTimer(this); connect (timer, SIGNAL(timeout()), this, SLOT(showTime())); timer-&gt;start (1000); showTime(); setWindowTitle (tr ("Digital Clock")); resize (150, 60); } void DigitalClock :: showTime() { QTime time = QTime::currentTime(); QString text = time.toString("hh:mm"); if ((time.second() % 2) == 0) text[2] = ' '; display(text); } int main (int argc, char *argv[]) { QApplication app(argc, argv); DigitalClock clock; clock.show(); return app.exec(); } </code></pre>
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