Re: [GtkGLExt] Compile error "virtual thunk"

[jlm <jsado_sc4 earthlink net>]

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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