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- !! 5 obj-y := main.o version.o mounts.o initramfs.o
7 <<
8 obj-y := main.o versi <<
9 ifneq ($(CONFIG_BLK_DEV_INITRD),y) <<
10 obj-y += noinitramfs. <<
11 else <<
12 obj-$(CONFIG_BLK_DEV_INITRD) += initramfs.o <<
13 endif <<
14 obj-$(CONFIG_GENERIC_CALIBRATE_DELAY) += calib <<
15 <<
16 obj-y += init_task.o <<
17 <<
18 mounts-y := do_mounts.o 6 mounts-y := do_mounts.o
>> 7 mounts-$(CONFIG_DEVFS_FS) += do_mounts_devfs.o
19 mounts-$(CONFIG_BLK_DEV_RAM) += do_mounts_r 8 mounts-$(CONFIG_BLK_DEV_RAM) += do_mounts_rd.o
20 mounts-$(CONFIG_BLK_DEV_INITRD) += do_mounts_i 9 mounts-$(CONFIG_BLK_DEV_INITRD) += do_mounts_initrd.o
>> 10 mounts-$(CONFIG_BLK_DEV_MD) += do_mounts_md.o
21 11
22 # !! 12 # files to be removed upon make clean
23 # UTS_VERSION !! 13 clean-files := ../include/linux/compile.h
24 # <<
25 14
26 smp-flag-$(CONFIG_SMP) := SMP !! 15 # 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 16
39 # !! 17 $(obj)/version.o: include/linux/compile.h
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 18
55 include/generated/utsversion.h: build-version- !! 19 # compile.h changes depending on hostname, generation number, etc,
56 include/generated/utsversion.h: build-timestam !! 20 # so we regenerate it always.
57 include/generated/utsversion.h: FORCE !! 21 # mkcompile_h will make sure to only update the
58 $(call filechk,uts_version) !! 22 # actual file if its content has changed.
59 23
60 $(obj)/version-timestamp.o: include/generated/ !! 24 include/linux/compile.h: FORCE
61 CFLAGS_version-timestamp.o := -include include !! 25 @echo ' CHK $@'
>> 26 @sh $(srctree)/scripts/mkcompile_h $@ "$(UTS_MACHINE)" "$(CONFIG_SMP)" "$(CC) $(CFLAGS)"
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