https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62224
--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> --- I don't see cppmodelmanager in that link command, so I'm guessing ensureUpdated is hidden in a different .so? Certainly compiling the preprocessed file you attached provides a definition of the symbol. Can you also attach a preprocessed cppcodemodelinspectordialog?