Re: [GtkGLExt] Compile error "virtual thunk"

["Lakin Wecker" <lakin wecker gmail com>]

I vaguely remember having a similar problem once.  iirc, it was cause by linking to different versions of the same library.  Have you run ldd on the apporpriate libraries to ensure they're all linked properly.   And are you certain that the above compile command is indeed finding the right version of gtkbonus?  (IE, there isn't one left lying around on your sytem from a previous build that it's finding and using?)

Lakin

On 8/16/06, jlm <jsado_sc4 earthlink net> wrote:

Well, I've recompiled glibc, glib, gtk+, gtkmm, gtkglext, and gtkglextmm
(whew!). I'm still having problems.

With my library, I have the build set up so that I can either compile
the library, or compile a test program. The test program links all the
object files in directly, so it doesn't use the library as a library. I
can compile the library, but not a test program.

Below shows how I am compiling and linking. I have a number of other
compile steps, but each uses the exact same flags as the one below.

I guess my next step is to create a small sample program that uses the
Gtk::GL::DrawingArea, and see what is the smallest program that I can
create that has this problem.

g++ -c $(pkg-config gtkmm-2.0 gtkglextmm-1.2 --cflags) -Isrc -ggdb3
-fno-inline test/color_dialog_test.cpp -o ./color_dialog_test.o
g++ $(pkg-config gtkmm-2.0 gtkglextmm-1.2 --libs) -o ./color_dialog_test
  ./debug_angles3d.o ./debug_color.o ./debug_color_dialog.o
./debug_color_dialog_impl.o ./debug_evaluator.o ./debug_gradient.o
./debug_gradient_dialog.o ./debug_gradient_dialog_impl.o
./debug_interpolate.o ./debug_interpolate_vbox.o
./debug_interpolate_graph.o ./debug_scrollbar.o ./debug_trough.o
./color_dialog_test.o
./debug_angles3d.o:(.gnu.linkonce.r._ZTCN8gtkbonus12light_sphereE0_N3Gtk2GL11DrawingAreaE+0x16c):
undefined reference to `virtual thunk [v:0,-24] to
Gtk::GL::DrawingArea::~DrawingArea [in-charge]()'
./debug_angles3d.o:(.gnu.linkonce.r._ZTCN8gtkbonus12light_sphereE0_N3Gtk2GL11DrawingAreaE+0x170):
undefined reference to `virtual thunk [v:0,-24] to
Gtk::GL::DrawingArea::~DrawingArea [in-charge deleting]()'
collect2: ld returned 1 exit status


Timothy M. Shead wrote:
> On Sun, 2006-08-13 at 19:15 -0400, jlm wrote:
>
>>I am upgrading from gtkglextmm 1.1.0 to 1.2.0. I believe I have made all
>>of the necessary changes to my code, but when I link I get this error:
>>
>>/usr/lib/gcc-lib/i686-pc-linux-gnu/3.3.6/../../../libgtkbonus.so:
>>undefined reference to `virtual thunk [v:0,-24] to
>>Gtk::GL::DrawingArea::~DrawingArea [in-charge]()'
>>/usr/lib/gcc-lib/i686-pc-linux-gnu/3.3.6/../../../libgtkbonus.so:
>>undefined reference to `virtual thunk [v:0,-24] to
>>Gtk::GL::DrawingArea::~DrawingArea [in-charge deleting]()'
>>
>>Now I have a library (libgtkbonus) that uses gtkglextmm, as well as the
>>main program. In the library I use the Gtk::GL::DrawingArea, but not in
>>the main program. I have compaired my use of this widget to that in
>>simple-darea.cc, and can find only one difference. The
>>Gtk::GL::DrawingArea in simple-darea.cc is initialized with a "config"
>>parameter, and mine is not. I have my glconfig code inside the
>>sub-class' constructor.
>
>
> I'm not familiar with the error message, but weird linker problems with
> C++ libraries are usually caused by trying to link together binaries
> that have been built with different versions of gcc.  Make sure that all
> of the libraries that you are linking and your application are all built
> with the same gcc.
>
> Tim
>
>
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