http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58678
--- Comment #6 from David Kredba <nheghathivhistha at gmail dot com> --- I am still affected by this on trunk with pykde4-4.12.1. Should I report it as pykde bug to its maintainers? CMakeFiles/python_module_PyKDE4_phonon.dir/sip/phonon/sipphononpart5.cpp.o: In function `~Notifier': /usr/include/phonon/backendcapabilities.h:57: undefined reference to `vtable for Phonon::BackendCapabilities::Notifier' /usr/include/phonon/backendcapabilities.h:57: undefined reference to `vtable for Phonon::BackendCapabilities::Notifier' CMakeFiles/python_module_PyKDE4_phonon.dir/sip/phonon/sipphononpart5.cpp.o: In function `Phonon::BackendCapabilities::Notifier::~Notifier()': /usr/include/phonon/backendcapabilities.h:57: undefined reference to `vtable for Phonon::BackendCapabilities::Notifier' collect2: error: ld returned 1 exit status
