Masahiro Yamada eed9382d52 UPSTREAM: 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. Bug: 168274246 Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> (cherry picked from commit 8b59cd81dc5e724eaea283fa6006985891c7bff4) Signed-off-by: Mars Lin <marslin@google.com> Change-Id: Ie52bb8e33b95d0e97998024d28c0d8d7caf8aa59		2020-09-24 10:02:38 +00:00
..
acpi	x86: ACPI: fix CPU hotplug deadlock	2020-04-23 10:36:38 +02:00
asm-generic	This is the 5.4.59 stable release	2020-08-19 08:40:57 +02:00
clocksource
crypto	Revert "ANDROID: Revert: Merge 5.4.60 into android11-5.4"	2020-08-23 13:12:51 +02:00
drm	ANDROID: include/linux: add low power mode and fps to notifier	2020-08-12 15:43:27 +00:00
dt-bindings	FROMLIST: clk: sunxi-ng: add support for the Allwinner A100 CCU	2020-08-27 17:11:05 +08:00
keys	KEYS: Don't write out to userspace while holding key semaphore	2020-04-23 10:36:45 +02:00
kvm
linux	UPSTREAM: kbuild: ensure full rebuild when the compiler is updated	2020-09-24 10:02:38 +00:00
math-emu
media	This is the 5.4.33 stable release	2020-04-17 11:26:58 +02:00
misc
net	UPSTREAM: udp: Support UDP fraglist GRO/GSO.	2020-09-09 08:48:03 +00:00
pcmcia
ras
rdma	This is the 5.4.56 stable release	2020-08-05 11:19:16 +02:00
scsi	ANDROID: GKI: scsi: add Android ABI padding to some structures	2020-04-23 19:26:27 +02:00
soc
sound	Revert "Revert "Revert "ANDROID: ALSA: jack: Update supported ja..."	2020-08-10 22:29:15 +00:00
target	scsi: target: fix hang when multiple threads try to destroy the same iscsi session	2020-04-21 09:05:04 +02:00
trace	ANDROID: vendor_hooks: Add hooks for debugging exception context	2020-09-15 18:02:49 +00:00
uapi	ANDROID: Incremental fs: fix magic compatibility again	2020-08-26 14:05:41 +00:00
vdso	UPSTREAM: vdso: Fix clocksource.h macro detection	2020-05-03 18:56:52 +00:00
video
xen