Detecting deprecated function usage

[Goatfather <goatfather centurylink net>]

What must I do to get g++ to complain when it encounters deprecated 
GTKMM function calls?

int main ( int argc, char** argv )
{
    Glib::RefPtr<Gtk::Application > refApp = Gtk::Application::create ();
    Gtk::Label label ( "label" );
    label.set_alignment ( 1.0, 0.5 );
    return ( 0 );
}
// g++ -Wall test.cc `pkg-config gtkmm-3.0 --cflags --libs`

g++ reports neither warning nor error on the set_alignment reference. 
I'm using GTKMM 3.20.1 and set_alignment was deprecated in 3.14.


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what we know.
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