1 # SPDX-License-Identifier: GPL-2.0 <<
2 # 1 #
3 # Makefile for the linux kernel. 2 # Makefile for the linux kernel.
4 # 3 #
5 4
6 ccflags-y := -fno-function-sections -fno-data- <<
7 <<
8 obj-y := main.o versi 5 obj-y := main.o version.o mounts.o
9 ifneq ($(CONFIG_BLK_DEV_INITRD),y) 6 ifneq ($(CONFIG_BLK_DEV_INITRD),y)
10 obj-y += noinitramfs. 7 obj-y += noinitramfs.o
11 else 8 else
12 obj-$(CONFIG_BLK_DEV_INITRD) += initramfs.o 9 obj-$(CONFIG_BLK_DEV_INITRD) += initramfs.o
13 endif 10 endif
14 obj-$(CONFIG_GENERIC_CALIBRATE_DELAY) += calib 11 obj-$(CONFIG_GENERIC_CALIBRATE_DELAY) += calibrate.o
15 12
16 obj-y += init_task.o <<
17 <<
18 mounts-y := do_mounts.o 13 mounts-y := do_mounts.o
19 mounts-$(CONFIG_BLK_DEV_RAM) += do_mounts_r 14 mounts-$(CONFIG_BLK_DEV_RAM) += do_mounts_rd.o
20 mounts-$(CONFIG_BLK_DEV_INITRD) += do_mounts_i 15 mounts-$(CONFIG_BLK_DEV_INITRD) += do_mounts_initrd.o
>> 16 mounts-$(CONFIG_BLK_DEV_MD) += do_mounts_md.o
21 17
22 # !! 18 # files to be removed upon make clean
23 # UTS_VERSION !! 19 clean-files := ../include/linux/compile.h
24 # <<
25 20
26 smp-flag-$(CONFIG_SMP) := SMP !! 21 # dependencies on generated files need to be listed explicitly
27 preempt-flag-$(CONFIG_PREEMPT_BUILD) := PRE <<
28 preempt-flag-$(CONFIG_PREEMPT_DYNAMIC) := PRE <<
29 preempt-flag-$(CONFIG_PREEMPT_RT) := PRE <<
30 <<
31 build-version = $(or $(KBUILD_BUILD_VERSION), <<
32 build-timestamp = $(or $(KBUILD_BUILD_TIMESTAM <<
33 <<
34 # Maximum length of UTS_VERSION is 64 chars <<
35 filechk_uts_version = \ <<
36 utsver=$$(echo '$(pound)'"$(build-vers <<
37 echo '$(pound)'define UTS_VERSION \""$ <<
38 <<
39 # <<
40 # Build version.c with temporary UTS_VERSION <<
41 # <<
42 <<
43 $(obj)/utsversion-tmp.h: FORCE <<
44 $(call filechk,uts_version) <<
45 <<
46 clean-files += utsversion-tmp.h <<
47 <<
48 $(obj)/version.o: $(obj)/utsversion-tmp.h <<
49 CFLAGS_version.o := -include $(obj)/utsversion <<
50 <<
51 # <<
52 # Build version-timestamp.c with final UTS_VER <<
53 # <<
54 22
55 include/generated/utsversion.h: build-version- !! 23 $(obj)/version.o: include/linux/compile.h
56 include/generated/utsversion.h: build-timestam <<
57 include/generated/utsversion.h: FORCE <<
58 $(call filechk,uts_version) <<
59 24
60 $(obj)/version-timestamp.o: include/generated/ !! 25 # compile.h changes depending on hostname, generation number, etc,
61 CFLAGS_version-timestamp.o := -include include !! 26 # so we regenerate it always.
>> 27 # mkcompile_h will make sure to only update the
>> 28 # actual file if its content has changed.
>> 29
>> 30 chk_compile.h = :
>> 31 quiet_chk_compile.h = echo ' CHK $@'
>> 32 silent_chk_compile.h = :
>> 33 include/linux/compile.h: FORCE
>> 34 @$($(quiet)chk_compile.h)
>> 35 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkcompile_h $@ \
>> 36 "$(UTS_MACHINE)" "$(CONFIG_SMP)" "$(CONFIG_PREEMPT)" "$(CC) $(KBUILD_CFLAGS)"
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