Hi again Sorry for my frequent posting. > > > > I THINK your virtual-function updates don't break the ABI, although I > > can't be certain. The update in src/qwt_picker_machine.h definitely DOES > > break the ABI however. I found out that this part was unnecessary. Just disabling the default copy constructor fixed the problem and I have removed the patch to qwt_picker_machine.h. But I haven't found any way around the instantiation problems.
Regards Gudjon
