mix_buffers_with_gain_t ARDOUR::mix_buffers_with_gain = 0;
mix_buffers_no_gain_t ARDOUR::mix_buffers_no_gain = 0;
-sigc::signal<void,std::string> ARDOUR::BootMessage;
+boost::signals2::signal<void(std::string)> ARDOUR::BootMessage;
void ARDOUR::setup_enum_writer ();