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kconfig: merge_config: use an empty file as initfile

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The scripts/kconfig/merge_config.sh script requires an existing
$INITFILE (or the $1 argument) as a base file for merging Kconfig
fragments. However, an empty $INITFILE can serve as an initial starting
point, later referenced by the KCONFIG_ALLCONFIG Makefile variable
if -m is not used. This variable can point to any configuration file
containing preset config symbols (the merged output) as stated in
Documentation/kbuild/kconfig.rst. When -m is used $INITFILE will
contain just the merge output requiring the user to run make (i.e.
KCONFIG_ALLCONFIG=<$INITFILE> make <allnoconfig/alldefconfig> or make
olddefconfig).

Instead of failing when `$INITFILE` is missing, create an empty file and
use it as the starting point for merges.

Signed-off-by: Daniel Gomez <da.gomez@samsung.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
This commit is contained in:
Daniel Gomez 2025-03-28 14:28:37 +00:00 committed by Masahiro Yamada
parent 3b8241f64c
commit a26fe287ee
1 changed files with 2 additions and 2 deletions
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4
scripts/kconfig/merge_config.sh
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@ -112,8 +112,8 @@ INITFILE=$1
shift;
if [ ! -r "$INITFILE" ]; then
echo "The base file '$INITFILE' does not exist. Exit." >&2
exit 1
echo "The base file '$INITFILE' does not exist. Creating one..." >&2
touch "$INITFILE"
fi
MERGE_LIST=$*