include/linux/dvb/Kbuild - kernel/common - Git at Google

 header-y += ca.h
 header-y += frontend.h
 header-y += net.h
 header-y += osd.h
 header-y += version.h

 unifdef-y += audio.h
 unifdef-y += dmx.h
 unifdef-y += video.h
	header-y += ca.h
	header-y += frontend.h
	header-y += net.h
	header-y += osd.h
	header-y += version.h

	unifdef-y += audio.h
	unifdef-y += dmx.h
	unifdef-y += video.h