gtkmm simple

make  all-recursive
make[1]: Wejście do katalogu `/home/sajmon/gtk-foobar'
Making all in src
make[2]: Wejście do katalogu `/home/sajmon/gtk-foobar/src'
  CXX    main.o
In file included from /usr/include/sigc++-2.0/sigc++/functors/slot.h:7,
                 from /usr/include/sigc++-2.0/sigc++/signal_base.h:28,
                 from /usr/include/sigc++-2.0/sigc++/signal.h:8,
                 from /usr/include/sigc++-2.0/sigc++/sigc++.h:80,
                 from /usr/include/glibmm-2.4/glibmm/signalproxy.h:13,
                 from /usr/include/glibmm-2.4/glibmm/objectbase.h:23,
                 from /usr/include/glibmm-2.4/glibmm/wrap.h:26,
                 from /usr/include/glibmm-2.4/glibmm/containerhandle_shared.h:25,
                 from /usr/include/glibmm-2.4/glibmm/arrayhandle.h:23,
                 from /usr/include/glibmm-2.4/glibmm.h:27,
                 from /usr/include/gtkmm-2.4/gtkmm.h:29,
                 from main.cc:20:
/usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h: In member function ‘typename sigc::adaptor_functor<T_functor>::result_type sigc::adaptor_functor<T_functor>::operator()() const [with T_functor = sigc::pointer_functor2<GtkButton*, void*, void>]’:
/usr/include/sigc++-2.0/sigc++/functors/slot.h:103:   instantiated from ‘static T_return sigc::internal::slot_call0<T_functor, T_return>::call_it(sigc::internal::slot_rep*) [with T_functor = sigc::pointer_functor2<GtkButton*, void*, void>, T_return = void]’
/usr/include/sigc++-2.0/sigc++/functors/slot.h:110:   instantiated from ‘static void* (* sigc::internal::slot_call0<T_functor, T_return>::address())(void*) [with T_functor = sigc::pointer_functor2<GtkButton*, void*, void>, T_return = void]’
/usr/include/sigc++-2.0/sigc++/functors/slot.h:454:   instantiated from ‘sigc::slot0<T_return>::slot0(const T_functor&) [with T_functor = sigc::pointer_functor2<GtkButton*, void*, void>, T_return = void]’
/usr/include/sigc++-2.0/sigc++/functors/slot.h:1130:   instantiated from ‘sigc::slot<T_return, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil>::slot(const T_functor&) [with T_functor = sigc::pointer_functor2<GtkButton*, void*, void>, T_return = void]’
main.cc:67:   instantiated from here
/usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251: error: no match for call to ‘(sigc::pointer_functor2<GtkButton*, void*, void>) ()’
/usr/include/sigc++-2.0/sigc++/functors/ptr_fun.h:146: note: candidates are: T_return sigc::pointer_functor2<T_arg1, T_arg2, T_return>::operator()(typename sigc::type_trait<T_base>::take, typename sigc::type_trait<T_derived>::take) const [with T_arg1 = GtkButton*, T_arg2 = void*, T_return = void]
/usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251: error: return-statement with a value, in function returning 'void'
make[2]: *** [main.o] Błąd 1
make[2]: Opuszczenie katalogu `/home/sajmon/gtk-foobar/src'
make[1]: *** [all-recursive] Błąd 1
make[1]: Opuszczenie katalogu `/home/sajmon/gtk-foobar'
make: *** [all] Błąd 2