Re: [gtkmm] [Glib] help with Glib::Module::get_symbol

[Barnaby Gray <bee pickle me uk>]

This is just a guess, but you may need to extern C the symbol to avoid
C++ symbol mangling, ie:
extern "C"
{
  static IPlugin *    get_module (); // permet de r?cup?rer le module
}  

On Fri, Apr 16, 2004 at 12:22:57PM +0200, cedric wrote:
> hello,
> I'm using GTKMM GLIB MODULE to have a modular application.
> 
> But I can't retrieve a symbol on a function which is in a module.
> I use get_symbol but it doesn't find it :o(
> 
> ***********************************************************************************
> Here's my code :
>            string filename = (*f).data();
>            cout << "creating module with filename : " <<  filename << " 
> ..." << endl ;
>            //string modulename = 
> Glib::Module::build_path("/usr/local",filename);
>            Glib::Module * NewModule = new  Glib::Module(filename , 
> Glib::MODULE_BIND_MASK);
>            if (NewModule->gobj() != NULL)
>                cout <<  "New module found." << endl;
>            else
>                cout << Glib::Module::get_last_error() << endl;
>            cout << "getting symbol ... " ;
>            *bool found = NewModule->get_symbol ("get_module", ptr_plugin);*
>            if (found) {
>            cout << "adding module into the list ... " ;
>            list_plugin.push_back((IPlugin *) ptr_plugin);
>            cout << "ok. " << endl;
> ***********************************************************************************
> And the module : (in a library with extension .so)
>            IPlugin *    get_module ()
>            {
>                std::cout << "get_module() ok." << std::endl;
>                return new test;
>            } 
> 
> IPlugin is the interface of my module.
> 
> ***********************************************************************************
> The header of my module :
> #ifndef EASYGEST_TEST
> #define EASYGEST_TEST
> #include <gtkmm.h>
> #include "IPlugin.hh"
> static IPlugin *    get_module (); // permet de r?cup?rer le module
> class test:public IPlugin
> {
>      public:
>         static void print ();
>          test ();
>          virtual ~ test ();
>        virtual Gtk::Menu_Helpers::MenuElem getMenuName ();
>        virtual Gtk::TreeModel::Row getTreeNode ();
>          Gtk::Menu_Helpers::MenuElem * MenuName;
>          Gtk::TreeModel::Row TreeNode;
> };
> #endif
> ***********************************************************************************
> When executing :
> 
> creating module with filename : ./Plugin/libtest.so ...
> New module found.
> getting symbol ... symbol not found !
> 
> I don't understand why get_symbol don't find my function get_module !
> 
> If you have any idea ...
> THANKS
> 
> Seb.
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