This is the mail archive of the
gcc@gcc.gnu.org
mailing list for the GCC project.
Tru64 non-virtual thunks multiply defined
- From: "Peter O'Gorman" <pogma at thewrittenword dot com>
- To: gcc at gcc dot gnu dot org
- Date: Fri, 19 Dec 2008 11:32:22 -0600
- Subject: Tru64 non-virtual thunks multiply defined
Hi,
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?
Peter
--
Peter O'Gorman
pogma@thewrittenword.com