scripts/gen_offset_header/Makefile - third_party/github/zephyrproject-rtos/zephyr - Git at Google

 HOSTCFLAGS_gen_offset_header.o += -DKERNEL_VERSION=0 -Wall -Werror -g
 HOSTCFLAGS_gen_idt.o += -Wno-unused-result

 hostprogs-y	+= gen_offset_header
 gen_offset_header-objs	:= gen_offset_header.o
 always		:= $(hostprogs-y)
	HOSTCFLAGS_gen_offset_header.o += -DKERNEL_VERSION=0 -Wall -Werror -g
	HOSTCFLAGS_gen_idt.o += -Wno-unused-result

	hostprogs-y += gen_offset_header
	gen_offset_header-objs := gen_offset_header.o
	always := $(hostprogs-y)