Documentation/connector/Makefile - kernel/windcharger - Git at Google

 ifneq ($(CONFIG_CONNECTOR),)
 obj-m += cn_test.o
 endif

 # List of programs to build
 hostprogs-y := ucon

 # Tell kbuild to always build the programs
 always := $(hostprogs-y)

 HOSTCFLAGS_ucon.o += -I$(objtree)/usr/include
	ifneq ($(CONFIG_CONNECTOR),)
	obj-m += cn_test.o
	endif

	# List of programs to build
	hostprogs-y := ucon

	# Tell kbuild to always build the programs
	always := $(hostprogs-y)

	HOSTCFLAGS_ucon.o += -I$(objtree)/usr/include