"Peter O'Gorman" <po...@thewrittenword.com> writes: > When building qt-3.3.8 and wxGTk on Tru64 UNIX 5.1 > (alphaev67-dec-osf5.1) with gcc-4.2.4, we got linker failures about > duplicate non-virtual thunks, e.g. from qt: > /usr/ccs/bin/ld: > .obj/release-shared-mt/qmotifdnd_x11.o: non-virtual thunk to > QDragMoveEvent::~QDragMoveEvent(): multiply defined > .obj/release-shared-mt/qmotifdnd_x11.o: non-virtual thunk to > QDragMoveEvent::~QDragMoveEvent(): multiply defined > .obj/release-shared-mt/qmotifdnd_x11.o: non-virtual thunk to > QDragEnterEvent::~QDragEnterEvent(): multiply defined > .obj/release-shared-mt/qmotifdnd_x11.o: non-virtual thunk to > QDragEnterEvent::~QDragEnterEvent(): multiply defined > > This appears to be because the non-virtual thunks are not output weak on this > platform, so, those that appear in multiple objects will cause linker errors > like this (in the above case, there are _ZThn16_N14QDragMoveEventD0Ev and > _ZThn16_N14QDragMoveEventD1Ev in both qdnd_x11.o and qmotifdnd_x11.o). > > Tru64 appears to have some weak symbol support, is there a reason that > these thunks are not weak?
Tru64 is not widely used by gcc developers. I do see support for generating weak symbols in the source code, but I don't know why it isn't helping here. This is most likely a bug somewhere. Please report it according to http://gcc.gnu.org/bugs.html . Thanks. This message would be more appropriate for the mailing list gcc-h...@gcc.gnu.org. Please take any followups there. Thanks. Ian
