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* Makefile.in: (HAVE_DBUS): Add D-Bus definitions if defined.
(ALL_CFLAGS): Add ${DBUS_CFLAGS}.
(obj): Add $(DBUS_OBJ).
(LIBES): Add $(DBUS_LIBS).
(dbusbind.o): New target.

* dbusbind.c: New file.

* emacs.c (main): Call syms_of_dbusbind when HAVE_DBUS is defined.

* keyboard.c: All D-Bus related code is wrapped by "#ifdef HAVE_DBUS".
(Qdbus_event) New Lisp symbol.
(kbd_buffer_get_event, make_lispy_event): Handle DBUS_EVENT.
(gobble_input): Call xd_read_queued_messages, reading D-Bus
messages.
(keys_of_keyboard ): Define dbus-event.

* termhooks.h (event_kind): Add DBUS_EVENT when HAVE_DBUS is defined.