a55f283e8b
Now that UTS_VERSION was separated out, this header can be generated much earlier, and probably the top Makefile is a better place to do it than init/Makefile. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
1.8 KiB
SPDX-License-Identifier: GPL-2.0
Makefile for the linux kernel.
ccflags-y := -fno-function-sections -fno-data-sections
obj-y := main.o version.o mounts.o ifneq ($(CONFIG_BLK_DEV_INITRD),y) obj-y += noinitramfs.o else obj-$(CONFIG_BLK_DEV_INITRD) += initramfs.o endif obj-$(CONFIG_GENERIC_CALIBRATE_DELAY) += calibrate.o
obj-y += init_task.o
mounts-y := do_mounts.o mounts-$(CONFIG_BLK_DEV_RAM) += do_mounts_rd.o mounts-$(CONFIG_BLK_DEV_INITRD) += do_mounts_initrd.o
UTS_VERSION
smp-flag-$(CONFIG_SMP) := SMP preempt-flag-$(CONFIG_PREEMPT_BUILD) := PREEMPT preempt-flag-$(CONFIG_PREEMPT_DYNAMIC) := PREEMPT_DYNAMIC preempt-flag-$(CONFIG_PREEMPT_RT) := PREEMPT_RT
build-version = $(or $(KBUILD_BUILD_VERSION), $(build-version-auto)) build-timestamp = $(or $(KBUILD_BUILD_TIMESTAMP), $(build-timestamp-auto))
Maximum length of UTS_VERSION is 64 chars
filechk_uts_version =
utsver=$$(echo '$(pound)'"$(build-version)" $(smp-flag-y) $(preempt-flag-y) "$(build-timestamp)" | cut -b -64);
echo '$(pound)'define UTS_VERSION ""$${utsver}""
Build version.c with temporary UTS_VERSION
$(obj)/utsversion-tmp.h: FORCE $(call filechk,uts_version)
clean-files += utsversion-tmp.h
$(obj)/version.o: $(obj)/utsversion-tmp.h CFLAGS_version.o := -include $(obj)/utsversion-tmp.h
Build version-timestamp.c with final UTS_VERSION
include/generated/utsversion.h: build-version-auto = $(shell $(srctree)/$(src)/build-version) include/generated/utsversion.h: build-timestamp-auto = $(shell LC_ALL=C date) include/generated/utsversion.h: FORCE $(call filechk,uts_version)
$(obj)/version-timestamp.o: include/generated/utsversion.h CFLAGS_version-timestamp.o := -include include/generated/utsversion.h