1# SPDX-License-Identifier: GPL-2.0 2# 3# Makefile for the linux kernel. 4# 5 6ccflags-y := -fno-function-sections -fno-data-sections 7 8obj-y := main.o version.o mounts.o 9ifneq ($(CONFIG_BLK_DEV_INITRD),y) 10obj-y += noinitramfs.o 11else 12obj-$(CONFIG_BLK_DEV_INITRD) += initramfs.o 13endif 14obj-$(CONFIG_GENERIC_CALIBRATE_DELAY) += calibrate.o 15 16ifneq ($(CONFIG_ARCH_INIT_TASK),y) 17obj-y += init_task.o 18endif 19 20mounts-y := do_mounts.o 21mounts-$(CONFIG_BLK_DEV_RAM) += do_mounts_rd.o 22mounts-$(CONFIG_BLK_DEV_INITRD) += do_mounts_initrd.o 23mounts-$(CONFIG_BLK_DEV_MD) += do_mounts_md.o 24 25# dependencies on generated files need to be listed explicitly 26$(obj)/version.o: include/generated/compile.h 27 28# compile.h changes depending on hostname, generation number, etc, 29# so we regenerate it always. 30# mkcompile_h will make sure to only update the 31# actual file if its content has changed. 32 33 chk_compile.h = : 34 quiet_chk_compile.h = echo ' CHK $@' 35silent_chk_compile.h = : 36include/generated/compile.h: FORCE 37 @$($(quiet)chk_compile.h) 38 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkcompile_h $@ \ 39 "$(UTS_MACHINE)" "$(CONFIG_SMP)" "$(CONFIG_PREEMPT)" "$(CC) $(KBUILD_CFLAGS)" 40