how to solve this the error undefined reference in this case

[Qt Enthusiast]

4.8.6/Linux5/x86_64/lib -o simpletreemodel main.o treeitem.o treemodel.o moc_treemodel.o qrc_simpletreemodel.o -L/in/qt-4.8.6/Linux5/x86_64/lib -lQtGui -L/in/qt-4.8.6/Linux5/x86_64/lib -L/usr/X11R6/lib -lQtCore -lpthread
main.o: In function myclass::myclass(QObject*)': main.cpp:(.text+0x61f): undefined reference to vtable for myclass'
main.o: In function myclass::~myclass()': main.cpp:(.text._ZN7myclassD2Ev[_ZN7myclassD5Ev]+0xb): undefined reference to vtable for myclass'
main.o: In function myclass::~myclass()': main.cpp:(.text._ZN7myclassD0Ev[_ZN7myclassD5Ev]+0xb): undefined reference to vtable for myclass'
collect2: ld returned 1 exit status
make: *** [simpletreemodel] Error 1

[kshegunov]

Show the declaration of myclass and the definition of myclass::myclass and myclass::~myclass.

[SGaist]

Hi,

In addition to what @kshegunov wrote, did you add or remove the Q_OBJECT macro from your class ? If so you likely forgot to re-run qmake before building your application.

[Qt Enthusiast]

yes and if i put Q_OBJECT then i get this error do i have start from qmake again

[mrjj]

@Qt-Enthusiast
Show code :)

[Qt Enthusiast]

https://paste.ofcode.org/iphXzSpzkkML3d9wKAEftq

What I am missing .Event if I rerun the from qmake , I am getting the error

[hskoglund]

Hi, try to move the class definition ( class myclass: public QObject..) into a .h file. The moc compiler will be more happy.

[kshegunov]

@Qt-Enthusiast said in how to solve this the error undefined referene in this case:

What I am missing.

Nothing as far as I can see. Try what @hskoglund suggested and do a full rebuild.