This is just a bandaid fix, we really need to systematically collect
type functions for all backends.
${CPP} $(DEFS) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) xgen-gtfsrc.c | \
$(GREP) -o '\bg[td]k_[a-zA-Z0-9_]*_get_type\b' | \
sort | uniq | \
- $(SED) '{ s/^/*tp++ = /; s/$$/();/; }' > xgen-gtf \
+ $(SED) '{ s/^/*tp++ = /; s/$$/();/; s/^.*\(gdk_x11\|gtk_plug_\|gtk_socket_\).*$$/#ifdef GDK_WINDOWING_X11\n&\n#endif/; }' > xgen-gtf \
&& cp xgen-gtf $@ && rm -f xgen-gtf
gtktestutils.c: gtktypefuncs.c