kconfig / kbuild: Re-sync with Linux 4.20

Align Kconfig and Kbuild logic to Linux 4.20 release with minimal impact
on files outside of this scope.

Our previous Kconfig sync was done by commit 587e4a429698 ("kconfig /
kbuild: Re-sync with Linux 4.19").

As part of this re-sync, a few related changes from previous Linux
releases were found to have been missed and merged in, and are not in
the following list.

The imported Linux commits are:

[From prior to v4.19]
b1e0d8b70fa3 kbuild: Fix gcc -x syntax
a4353898980c kconfig: add CC_IS_GCC and GCC_VERSION
469cb7376c06 kconfig: add CC_IS_CLANG and CLANG_VERSION

[From v4.19 to v4.20]
487c7c7702ab kbuild: prefix Makefile.dtbinst path with $(srctree) unconditionally
0d91bf584fe5 kbuild: remove old check for CFLAGS use
25815cf5ffec kbuild: hide most of targets when running config or mixed targets
00d78ab2ba75 kbuild: remove dead code in cmd_files calculation in top Makefile
23066c3f4e21 Compiler Attributes: enable -Wstringop-truncation on W=1 (gcc >= 8)
37c8a5fafa3b kbuild: consolidate Devicetree dtb build rules
80463f1b7bf9 kbuild: add --include-dir flag only for out-of-tree build
77ec0c20c7e0 kbuild: remove VERSION and PATCHLEVEL from $(objtree)/Makefile
74bc0c09b2da kbuild: remove user ID check in scripts/mkmakefile
4fd61277f662 kbuild: do not pass $(objtree) to scripts/mkmakefile
80d0dda3a4e5 kbuild: simplify command line creation in scripts/mkmakefile
fb073a4b473e kbuild: add -Wno-pointer-sign flag unconditionally
9df3e7a7d7d6 kbuild: add -Wno-unused-but-set-variable flag unconditionally
69ea912fda74 kbuild: remove unneeded link_multi_deps
7d0ea2524202 kbuild: use 'else ifeq' for checksrc to improve readability
04c459d20448 kconfig: remove oldnoconfig target
0085b4191f3e kconfig: remove silentoldconfig target
3f80babd9ca4 kbuild: remove unused cc-fullversion variable
2cd3faf87d2d merge_config.sh: Allow to define config prefix
076f421da5d4 kbuild: replace cc-name test with CONFIG_CC_IS_CLANG
6bbe4385d035 kconfig: merge_config: avoid false positive matches from comment lines

[From post v4.20]
885480b08469 Makefile: Move -Wno-unused-but-set-variable out of GCC only block

There are a number of changes related to additional warnings as well as
being able to drop cc-name entirely that have been omitted for now as
additional work is required first.

Cc: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Tom Rini <trini@konsulko.com>

kconfig: re-sync with Linux 4.10

Re-sync all files under the scripts/kconfig directory with
Linux 4.10.

Some parts include U-Boot own modification. I made sure to not
revert the following commits:

5b8031ccb4ed ("Add more SPDX-License-Identifier tags")
192bc6948b02 ("Fix GCC format-security errors and convert sprintfs.")
da58dec86616 ("Various Makefiles: Add SPDX-License-Identifier tags")
20c20826efab ("Kconfig: Enable usage of escape char '\' in string values")

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

kconfig: sync with Linux 4.1

Update the files under scripts/kconfig/ to match Linux 4.1.
Some Kconfig sources have diverged from those in the kernel,
so commit-base syncing was done not to lose U-Boot specific updates.

The commits cherry-picked from Linux are:

[1] commit be8af2d54a66911693eddc556e4f7a866670082b
Author: Bjørn Forsman <bjorn.forsman@gmail.com>
kconfig/lxdialog: get ncurses CFLAGS with pkg-config

[2] commit 3943f42c11896ce82ad3da132c8a5630313bdd0e
Author: Andrey Utkin <andrey.krieger.utkin@gmail.com>
Replace mentions of "list_struct" to "list_head"

[3] commit e4e458b45c5861808674eebfea94cee2258bb2ea
Author: Arjun Sreedharan <arjun024@gmail.com>
calloc/xcalloc: Fix argument order

[4] commit 09950bc256e3628d275f90e016e6f5a039fbdcab
Author: Olof Johansson <olof@lixom.net>
merge_config.sh: Display usage if given too few arguments

[5] commit b6a2ab2cd4739a9573ed41677e53171987b8da34
Author: Colin Ian King <colin.king@canonical.com>
kconfig: use va_end to match corresponding va_start

[6] commit 70529b1a1784503169416df19ce3d68746401340
Author: Michal Marek <mmarek@suse.cz>
kconfig: Get rid of the P() macro in headers

[7] commit 463157444e377bf9b279101b1f16a94c4648c03a
Author: Michal Marek <mmarek@suse.cz>
kconfig: Remove dead code

[8] commit ad8d40cda3ad22ad9e8863d55a5c88f85c0173f0
Author: Michal Marek <mmarek@suse.cz>
kconfig: Remove unnecessary prototypes from headers

[9] commit de4619937229378e81f95e99c9866acc8e207d34
Author: Masahiro Yamada <yamada.masahiro@socionext.com>
kbuild: mergeconfig: fix "jobserver unavailable" warning

[10] commit b9fe99c5b994c6ddc57780993966b18899526c0b
Author: Masahiro Yamada <yamada.masahiro@socionext.com>
kbuild: mergeconfig: move an error check to merge_config.sh

[11] commit 371cfd4ff0611d8bc5d18bbb9cc6a2bc3d56cd3d
Author: Masahiro Yamada <yamada.masahiro@socionext.com>
kbuild: mergeconfig: remove redundant $(objtree)

[12] commit 3a975b8cfcbe026b535f83bde9a3c009bae214f9
Author: Masahiro Yamada <yamada.masahiro@socionext.com>
merge_config.sh: improve indentation

[13] commit bc8f8f5fc47cd02c2c5f3580dac2fe6695af1edd
Author: Masahiro Yamada <yamada.masahiro@socionext.com>
merge_config.sh: rename MAKE to RUNMAKE

[14] commit 63a91033d52e64a22e571fe84924c0b7f21c280d
Author: Masahiro Yamada <yamada.masahiro@socionext.com>
kbuild: add generic mergeconfig target, %.config

[15] commit 1cba0c305758c3c1786ecaceb03e142c95a4edc9
Author: Michal Marek <mmarek@suse.cz>
kconfig: Simplify Makefile

[16] commit 0a1f00a1c86421cc07cec87011c7cf4df68ee54b
Author: Michal Marek <mmarek@suse.cz>
kconfig: Do not print status messages in make -s mode

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Bjørn Forsman <bjorn.forsman@gmail.com>
Signed-off-by: Andrey Utkin <andrey.krieger.utkin@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Arjun Sreedharan <arjun024@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>

Correct two non-functional misspellings "overrided".

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>

kconfig: import Kconfig files from Linux 3.16-rc7

Import
- scripts/kconfig/*
- include/linux/kconfig.h
from Linux 3.16-rc7.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

kconfig: re-sync with Linux 4.10

Re-sync all files under the scripts/kconfig directory with
Linux 4.10.

Some parts include U-Boot own modification. I made sure to not
revert the following commits:

5b8031ccb4ed ("Add more SPDX-License-Identifier tags")
192bc6948b02 ("Fix GCC format-security errors and convert sprintfs.")
da58dec86616 ("Various Makefiles: Add SPDX-License-Identifier tags")
20c20826efab ("Kconfig: Enable usage of escape char '\' in string values")

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

kconfig: sync with Linux 4.1

Update the files under scripts/kconfig/ to match Linux 4.1.
Some Kconfig sources have diverged from those in the kernel,
so commit-base syncing was done not to lose U-Boot specific updates.

The commits cherry-picked from Linux are:

[1] commit be8af2d54a66911693eddc556e4f7a866670082b
Author: Bjørn Forsman <bjorn.forsman@gmail.com>
kconfig/lxdialog: get ncurses CFLAGS with pkg-config

[2] commit 3943f42c11896ce82ad3da132c8a5630313bdd0e
Author: Andrey Utkin <andrey.krieger.utkin@gmail.com>
Replace mentions of "list_struct" to "list_head"

[3] commit e4e458b45c5861808674eebfea94cee2258bb2ea
Author: Arjun Sreedharan <arjun024@gmail.com>
calloc/xcalloc: Fix argument order

[4] commit 09950bc256e3628d275f90e016e6f5a039fbdcab
Author: Olof Johansson <olof@lixom.net>
merge_config.sh: Display usage if given too few arguments

[5] commit b6a2ab2cd4739a9573ed41677e53171987b8da34
Author: Colin Ian King <colin.king@canonical.com>
kconfig: use va_end to match corresponding va_start

[6] commit 70529b1a1784503169416df19ce3d68746401340
Author: Michal Marek <mmarek@suse.cz>
kconfig: Get rid of the P() macro in headers

[7] commit 463157444e377bf9b279101b1f16a94c4648c03a
Author: Michal Marek <mmarek@suse.cz>
kconfig: Remove dead code

[8] commit ad8d40cda3ad22ad9e8863d55a5c88f85c0173f0
Author: Michal Marek <mmarek@suse.cz>
kconfig: Remove unnecessary prototypes from headers

[9] commit de4619937229378e81f95e99c9866acc8e207d34
Author: Masahiro Yamada <yamada.masahiro@socionext.com>
kbuild: mergeconfig: fix "jobserver unavailable" warning

[10] commit b9fe99c5b994c6ddc57780993966b18899526c0b
Author: Masahiro Yamada <yamada.masahiro@socionext.com>
kbuild: mergeconfig: move an error check to merge_config.sh

[11] commit 371cfd4ff0611d8bc5d18bbb9cc6a2bc3d56cd3d
Author: Masahiro Yamada <yamada.masahiro@socionext.com>
kbuild: mergeconfig: remove redundant $(objtree)

[12] commit 3a975b8cfcbe026b535f83bde9a3c009bae214f9
Author: Masahiro Yamada <yamada.masahiro@socionext.com>
merge_config.sh: improve indentation

[13] commit bc8f8f5fc47cd02c2c5f3580dac2fe6695af1edd
Author: Masahiro Yamada <yamada.masahiro@socionext.com>
merge_config.sh: rename MAKE to RUNMAKE

[14] commit 63a91033d52e64a22e571fe84924c0b7f21c280d
Author: Masahiro Yamada <yamada.masahiro@socionext.com>
kbuild: add generic mergeconfig target, %.config

[15] commit 1cba0c305758c3c1786ecaceb03e142c95a4edc9
Author: Michal Marek <mmarek@suse.cz>
kconfig: Simplify Makefile

[16] commit 0a1f00a1c86421cc07cec87011c7cf4df68ee54b
Author: Michal Marek <mmarek@suse.cz>
kconfig: Do not print status messages in make -s mode

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Bjørn Forsman <bjorn.forsman@gmail.com>
Signed-off-by: Andrey Utkin <andrey.krieger.utkin@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Arjun Sreedharan <arjun024@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>

Correct two non-functional misspellings "overrided".

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>

kconfig: import Kconfig files from Linux 3.16-rc7

Import
- scripts/kconfig/*
- include/linux/kconfig.h
from Linux 3.16-rc7.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Reviewed-by: Simon Glass <sjg@chromium.org>