Masahiro Yamada 8b59cd81dc kbuild: ensure full rebuild when the compiler is updated ... Commit 21c54b7747 ("kconfig: show compiler version text in the top comment") added the environment variable, CC_VERSION_TEXT in the comment of the top Kconfig file. It can detect the compiler update, and invoke the syncconfig because all environment variables referenced in Kconfig files are recorded in include/config/auto.conf.cmd This commit makes it a CONFIG option in order to ensure the full rebuild when the compiler is updated. This works like follows: include/config/kconfig.h contains "CONFIG_CC_VERSION_TEXT" in the comment block. The top Makefile specifies "-include $(srctree)/include/linux/kconfig.h" to guarantee it is included from all kernel source files. fixdep parses every source file and all headers included from it, searching for words prefixed with "CONFIG_". Then, fixdep finds CONFIG_CC_VERSION_TEXT in include/config/kconfig.h and adds include/config/cc/version/text.h into every .*.cmd file. When the compiler is updated, syncconfig is invoked because init/Kconfig contains the reference to the environment variable CC_VERTION_TEXT. CONFIG_CC_VERSION_TEXT is updated to the new version string, and include/config/cc/version/text.h is touched. In the next rebuild, Make will rebuild every files since the timestamp of include/config/cc/version/text.h is newer than that of target. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>		2020-05-12 13:28:33 +09:00
..
acpi	Additional ACPI updates for 5.7-rc1	2020-04-06 10:35:06 -07:00
asm-generic	arch: split MODULE_ARCH_VERMAGIC definitions out to <asm/vermagic.h>	2020-04-23 10:50:26 +09:00
clocksource	pwm: omap-dmtimer: Drop unused header file	2020-03-30 18:03:06 +02:00
crypto	crypto: curve25519 - do not pollute dispatcher based on assembler	2020-04-09 00:01:59 +09:00
drm	drm/bridge: analogix_dp: Split bind() into probe() and real bind()	2020-04-09 10:29:35 +02:00
dt-bindings	RISC-V Patches for the 5.7 Merge Window, Part 1	2020-04-09 10:51:30 -07:00
keys	KEYS: Don't write out to userspace while holding key semaphore	2020-03-29 12:40:41 +01:00
kunit
kvm
linux	kbuild: ensure full rebuild when the compiler is updated	2020-05-12 13:28:33 +09:00
math-emu
media
misc
net	net: flow_offload: skip hw stats check for FLOW_ACTION_HW_STATS_DONT_CARE	2020-05-06 20:13:10 -07:00
pcmcia
ras
rdma
scsi	SCSI misc on 20200402	2020-04-02 17:03:53 -07:00
soc	net: dsa: ocelot: the MAC table on Felix is twice as large	2020-05-06 17:15:24 -07:00
sound	ASoC: Fixes for v5.7	2020-04-21 21:41:36 +02:00
target
trace	block-5.7-2020-05-09	2020-05-10 11:16:07 -07:00
uapi	uapi: revert flexible-array conversions	2020-05-04 11:30:15 -05:00
vdso	vdso/datapage: Use correct clock mode name in comment	2020-04-20 19:19:52 +02:00
video
xen	xen: Use evtchn_type_t as a type for event channels	2020-04-07 12:12:54 +02:00