Our last sync with the kernel was 5.1.

We are so out of sync now, that tracking the patches and backporting
them one by one makes little sense and it's going to take ages.

This is an attempt to sync up Makefiles to 6.1.
Unfortunately due to sheer amount of patches this is not easy to review,
but that's what we decided during a community call for the bump to 5.1,
so we are following the same guidelines here.

Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>a #rebased on -next

Backported from kernel
commit ba97df45581f ("kbuild: use assignment instead of define ... endef for filechk_* rules")

Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>

Clang's preprocessor may emit extra spaces for lines starting with '#'.
Lines with these extra characters cannot be handled by Kconfig and will
be ignored with warnings like,

        unexpected data:  # CONFIG_OF_BOARD_FIXUP is not set

Those options that is expected to be assigned explicitly with N will be
set to the default value, messing up board configurations.

Let's sed these spaces away to ensure board configurations could be
correctly generated with Clang.

Link: https://github.com/llvm/llvm-project/issues/78778
Fixes: 2027e99e61a ("Makefile: Run defconfig files through the C preprocessor")
Reported-by: Nathaniel Hourt <I@nathaniel.land>
Signed-off-by: Yao Zi <ziyao@disroot.org>

The Linux kernel documentation has transitioned from using
kconfig-language.txt to kconfig-language.rst. Therefore update all
occurrences of kconfig-language.txt.

Signed-off-by: Hiago De Franco <hiago.franco@toradex.com>

Drop all duplicate newlines. No functional change.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>

Commit 2027e99e61aa ("Makefile: Run defconfig files through the C
preprocessor") adds `generated_defconfig' file, but fails to clean that
up. It might be useful to have that file around after `make' is done,
but it's better to clean that up on `make clean'. Also we probably want
to hide it in `git status' list. This patch makes the described changes,
and also adds `-P' parameter to the CPP command that produces the
`generated_defconfig' to avoid generating linemarkers.

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
Fixes: 2027e99e61aa ("Makefile: Run defconfig files through the C preprocessor")
Acked-by: Andrew Davis <afd@ti.com>

This allows us to use some of the normal preprocessor directives inside
defconfig files. Such as #define and #include.

Signed-off-by: Andrew Davis <afd@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Nishanth Menon <nm@ti.com>

Add support to config fragments (.config) located in the /board
directory. This will allow only base defconfigs to live in /configs and
all fragments to live in their respective device directory in /board/..

Signed-off-by: Jason Kacines <j-kacines@ti.com>

Signed-off-by: Wolfgang Denk <wd@denx.de>

Signed-off-by: Wolfgang Denk <wd@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>