Static linkage to gtkmm.a difficulties

[Ronan Trépos <Ronan Trepos toulouse inra fr>]

Hello,

We use the MXE cross compiling environment   (http://mxe.cc/) for 
building the sofware vle (http://www.vle-project.org/wiki/Main_Page) 
which relies on gtkmm.
MXE provides static libraries of gtkmm (actually, all libraries are 
provided as static libraries). And we have some difficulties using the 
static version of gtkmm.

I built a litle example which is based on the hello world example of 
gtkmm and compiled on windows 7 using mingw. Gtkmm so as gtkmm 
dependencies are
compiled for windows as static libraries using mxe.

That works fine when we link our executable main.exe against gtkmm.a,  
(the hello world button appears and the signal is taken into account 
into the function on_clicked_button).
The problem arises when an external dll is used (say libhelloworld) in 
between. We link the libhelloword.dll to gtkmm.a, main.exe to gtkmm.a 
and libhelloworld.dll.
Execution ends up with error :

(main.exe:2084): GLib-GObject-CRITICAL **: gtype.c:2708: You forgot to 
call g_type_init()

The two situations are part of the example project which is built with 
cmake. If you are interested I can send you the project.

My guess is that glib, gtk etc.. require the initialization of static 
objects. Since main.exe and libhelloworld are statically linked to 
gtkmm.a then there is duplication of those static objects.
And the ones into the dll are not initialized by the gtkmm Main 
constructor. Am I right ?
I tried some initialization functions without success (although error 
message can be different) e.g :

g_type_init();
Glib::init();
Gtk::Main::init_gtkmm_internals();
gtk_init(NULL,NULL);
gdk_init(NULL,NULL);

Any help/comment is welcome,
Thank you
Ronan

--
Trépos Ronan
INRA unité BIA, équipe MAD, Toulouse
http://carlit.toulouse.inra.fr/wikiz/index.php/Ronan_TREPOS
tel : 05 61 28 51 89