1 # SPDX-License-Identifier: GPL-2.0 1 # SPDX-License-Identifier: GPL-2.0
2 # 2 #
3 # Makefile for the linux kernel. 3 # Makefile for the linux kernel.
4 # 4 #
5 5
6 ccflags-y := -fno-function-sections -fno-data- 6 ccflags-y := -fno-function-sections -fno-data-sections
7 7
8 obj-y := main.o versi 8 obj-y := main.o version.o mounts.o
9 ifneq ($(CONFIG_BLK_DEV_INITRD),y) 9 ifneq ($(CONFIG_BLK_DEV_INITRD),y)
10 obj-y += noinitramfs. 10 obj-y += noinitramfs.o
11 else 11 else
12 obj-$(CONFIG_BLK_DEV_INITRD) += initramfs.o 12 obj-$(CONFIG_BLK_DEV_INITRD) += initramfs.o
13 endif 13 endif
14 obj-$(CONFIG_GENERIC_CALIBRATE_DELAY) += calib 14 obj-$(CONFIG_GENERIC_CALIBRATE_DELAY) += calibrate.o
15 15
16 obj-y += init_task.o 16 obj-y += init_task.o
17 17
18 mounts-y := do_mounts.o 18 mounts-y := do_mounts.o
19 mounts-$(CONFIG_BLK_DEV_RAM) += do_mounts_r 19 mounts-$(CONFIG_BLK_DEV_RAM) += do_mounts_rd.o
20 mounts-$(CONFIG_BLK_DEV_INITRD) += do_mounts_i 20 mounts-$(CONFIG_BLK_DEV_INITRD) += do_mounts_initrd.o
21 21
22 # 22 #
23 # UTS_VERSION 23 # UTS_VERSION
24 # 24 #
25 25
26 smp-flag-$(CONFIG_SMP) := SMP 26 smp-flag-$(CONFIG_SMP) := SMP
27 preempt-flag-$(CONFIG_PREEMPT_BUILD) := PRE 27 preempt-flag-$(CONFIG_PREEMPT_BUILD) := PREEMPT
28 preempt-flag-$(CONFIG_PREEMPT_DYNAMIC) := PRE 28 preempt-flag-$(CONFIG_PREEMPT_DYNAMIC) := PREEMPT_DYNAMIC
29 preempt-flag-$(CONFIG_PREEMPT_RT) := PRE 29 preempt-flag-$(CONFIG_PREEMPT_RT) := PREEMPT_RT
30 30
31 build-version = $(or $(KBUILD_BUILD_VERSION), 31 build-version = $(or $(KBUILD_BUILD_VERSION), $(build-version-auto))
32 build-timestamp = $(or $(KBUILD_BUILD_TIMESTAM 32 build-timestamp = $(or $(KBUILD_BUILD_TIMESTAMP), $(build-timestamp-auto))
33 33
34 # Maximum length of UTS_VERSION is 64 chars 34 # Maximum length of UTS_VERSION is 64 chars
35 filechk_uts_version = \ 35 filechk_uts_version = \
36 utsver=$$(echo '$(pound)'"$(build-vers 36 utsver=$$(echo '$(pound)'"$(build-version)" $(smp-flag-y) $(preempt-flag-y) "$(build-timestamp)" | cut -b -64); \
37 echo '$(pound)'define UTS_VERSION \""$ 37 echo '$(pound)'define UTS_VERSION \""$${utsver}"\"
38 38
39 # 39 #
40 # Build version.c with temporary UTS_VERSION 40 # Build version.c with temporary UTS_VERSION
41 # 41 #
42 42
43 $(obj)/utsversion-tmp.h: FORCE 43 $(obj)/utsversion-tmp.h: FORCE
44 $(call filechk,uts_version) 44 $(call filechk,uts_version)
45 45
46 clean-files += utsversion-tmp.h 46 clean-files += utsversion-tmp.h
47 47
48 $(obj)/version.o: $(obj)/utsversion-tmp.h 48 $(obj)/version.o: $(obj)/utsversion-tmp.h
49 CFLAGS_version.o := -include $(obj)/utsversion 49 CFLAGS_version.o := -include $(obj)/utsversion-tmp.h
50 50
51 # 51 #
52 # Build version-timestamp.c with final UTS_VER 52 # Build version-timestamp.c with final UTS_VERSION
53 # 53 #
54 54
55 include/generated/utsversion.h: build-version- !! 55 include/generated/utsversion.h: build-version-auto = $(shell $(srctree)/$(src)/build-version)
56 include/generated/utsversion.h: build-timestam 56 include/generated/utsversion.h: build-timestamp-auto = $(shell LC_ALL=C date)
57 include/generated/utsversion.h: FORCE 57 include/generated/utsversion.h: FORCE
58 $(call filechk,uts_version) 58 $(call filechk,uts_version)
59 59
60 $(obj)/version-timestamp.o: include/generated/ 60 $(obj)/version-timestamp.o: include/generated/utsversion.h
61 CFLAGS_version-timestamp.o := -include include 61 CFLAGS_version-timestamp.o := -include include/generated/utsversion.h
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