Currently, menu->prompt->type is checked to distinguish "comment"
(P_COMMENT) and "menu" (P_MENU) entries from regular "config" entries.
This is odd because P_COMMENT and P_MENU are not properties.

This commit introduces menu type enum to distinguish menu types more
naturally.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

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>

The explicit casting from (char *) to (const char *) is unneeded.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

When conf_read_simple() is called with S_DEF_AUTO, it is meant to read
previous symbol values from include/config/auto.conf to determine which
include/config/* files should be touched.

This process should not modify the current symbol status in any way.
However, conf_touch_deps() currently invalidates all symbol values and
recalculates them, which is totally unneeded.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

The string allocated in sym_warn_unmet_dep() is never freed, leading
to a memory leak when an unmet dependency is detected.

Fixes: f8f69dc0b4e0 ("kconfig: make unmet dependency warnings readable")
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Petr Vorel <pvorel@suse.cz>

Most 'make *config' commands use .config as the base configuration file.

When .config does not exist, Kconfig tries to load a file listed in
KCONFIG_DEFCONFIG_LIST instead.

However, since commit b75b0a819af9 ("kconfig: change defconfig_list
option to environment variable"), warning messages have displayed an
incorrect file name in such cases.

Below is a demonstration using Debian Trixie. While loading
/boot/config-6.12.9-amd64, the warning messages incorrectly show .config
as the file name.

With this commit, the correct file name is displayed in warnings.

[Before]

  $ rm -f .config
  $ make config
  #
  # using defaults found in /boot/config-6.12.9-amd64
  #
  .config:6804:warning: symbol value 'm' invalid for FB_BACKLIGHT
  .config:9895:warning: symbol value 'm' invalid for ANDROID_BINDER_IPC

[After]

  $ rm -f .config
  $ make config
  #
  # using defaults found in /boot/config-6.12.9-amd64
  #
  /boot/config-6.12.9-amd64:6804:warning: symbol value 'm' invalid for FB_BACKLIGHT
  /boot/config-6.12.9-amd64:9895:warning: symbol value 'm' invalid for ANDROID_BINDER_IPC

Fixes: b75b0a819af9 ("kconfig: change defconfig_list option to environment variable")
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

A QString constructed from a character literal of length 0, i.e. "", is not
"null" for historical reasons. This does not matter here so use the preferred
method isEmpty() instead.

Also directly construct empty QString objects instead of passing in an empty
character literal that has to be parsed into an empty object first.

Signed-off-by: Rolf Eike Beer <eb@emlix.com>
Link: https://doc.qt.io/qt-6/qstring.html#distinction-between-null-and-empty-strings
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

merge_config does not respect the Make's -s (--silent) option.

Let's sink the stdout from merge_config for silent builds.

This commit does not cater to the direct invocation of merge_config.sh
(e.g. arch/mips/Makefile).

Reported-by: Leon Romanovsky <leon@kernel.org>
Closes: https://lore.kernel.org/all/e534ce33b0e1060eb85ece8429810f087b034c88.1733234008.git.leonro@nvidia.com/
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Tested-by: Leon Romanovsky <leon@kernel.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>

The positional argument specifies the top-level Kconfig. Include this
information in the help message.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

The P_MENU entries ("menu" and "menuconfig") are never displayed in
symbolMode.

The condition, list->mode == symbolMode, is never met here.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>