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Masahiro Yamada ae4c4cee81 kbuild: move init/build-version to scripts/

At first, I thought this script would be needed only in init/Makefile.

However, commit 5db8face97 ("kbuild: Restore .version auto-increment
behaviour for Debian packages") and commit 1789fc9125 ("kbuild:
rpm-pkg: invoke the kernel build from rpmbuild for binrpm-pkg")
revealed that it was actually needed for scripts/package/mk* as well.

After all, scripts/ is a better place for it.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>

2024-07-16 01:08:37 +09:00

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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)/scripts/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

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