This is unused since commit cdfc47950a ("kconfig: search for a config
to base the local(mod|yes)config on").
Having unused $config is confusing because $config is used as a local
variable in various sub-routines.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
struct property can reference to the symbol that it is associated with
by prop->menu->sym.
Fix up the one usage of prop->sym, and remove sym from struct property.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
menu_add_prompt() is the only function that calls menu_add_prop() with
non-NULL prompt.
So, the code inside the if-conditional block of menu_add_prop() can be
moved to menu_add_prompt().
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Now that 'prompt' is only reduced from T_WORD_QUOTE without any action,
use T_WORD_QUOTE directly.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Commit 8636a1f967 ("treewide: surround Kconfig file paths with double
quotes") killed use-cases to reduce an unquoted string into the 'prompt'
symbol.
Kconfig still allows to use an unquoted string in the context of menu,
source, or prompt.
So, you can omit quoting if the prompt is a single word:
bool foo
..., but I do not think this is so useful.
Let's require quoting:
bool "foo"
All the Kconfig files in the kernel are written in this way.
Remove the T_WORD from the right-hand side of the symbol 'prompt'.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
In menu_finalize(), the dependency of a menu entry is propagated
downwards.
For the 'menu', parent->dep and parent->prompt->visible.expr have
the same expression. Both accumulate the 'depends on' of itself and
upper menu entries.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
This reverts commit ba6ff60d5e ("kconfig: don't emit warning upon
rootmenu's prompt redefinition").
At that time, rootmenu.prompt was always set first, then it was set
again if a "mainmenu" statement was specified in the Kconfig file.
This is no longer the case since commit 0724a7c32a ("kconfig: Don't
leak main menus during parsing"). Remove the unneeded check.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
NULL expressions are taken to always be true, as implemented by the
expr_is_yes() macro and by several other functions in expr.c. As such,
they ought to be valid inputs to expr_eq(), which compares two
expressions.
Signed-off-by: Thomas Hebb <tommyhebb@gmail.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
If ncurses is installed, but at a non-default location, the previous
error message was not helpful in resolving the situation. Now it will
suggest that pkg-config might need to be installed in addition to
ncurses.
Signed-off-by: Alyssa Ross <hi@alyssa.is>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
make listnewconfig will list the individual options that need to be set.
This is useful but there's no easy way to get the help text associated
with the options at the same time. Introduce a new targe
'make helpnewconfig' which lists the full help text of all the
new options as well. This makes it easier to automatically generate
changes that are easy for humans to review. This command also adds
markers between each option for easier parsing.
Signed-off-by: Laura Abbott <labbott@redhat.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Some "make help" text lines extend beyond 80 characters.
Wrap them before an opening parenthesis, or before 80 characters.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
util.c exists both in scripts/kconfig/ and scripts/kconfig/lxdialog.
Prior to commit 54b8ae66ae ("kbuild: change *FLAGS_<basetarget>.o
to take the path relative to $(obj)"), Kbuild could not pass different
flags to source files with the same basename. Now that this issue
was solved, you can split util.c out of parser.y and compile them
independently of each other.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
The merge_config.sh script verifies that all the config options have
their expected value in the resulting file and prints any issues as
warnings. These checks aren't intended to be treated as errors given
the current implementation. However, since "set -e" was added, if the
grep command to look for a config option does not find it the script
will then abort prematurely.
Handle the case where the grep exit status is non-zero by setting
ACTUAL_VAL to an empty string to restore previous functionality.
Fixes: cdfca82157 ("merge_config.sh: Check error codes from make")
Signed-off-by: Guillaume Tucker <guillaume.tucker@collabora.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Kbuild provides per-file compiler flag addition/removal:
CFLAGS_<basetarget>.o
CFLAGS_REMOVE_<basetarget>.o
AFLAGS_<basetarget>.o
AFLAGS_REMOVE_<basetarget>.o
CPPFLAGS_<basetarget>.lds
HOSTCFLAGS_<basetarget>.o
HOSTCXXFLAGS_<basetarget>.o
The <basetarget> is the filename of the target with its directory and
suffix stripped.
This syntax comes into a trouble when two files with the same basename
appear in one Makefile, for example:
obj-y += foo.o
obj-y += dir/foo.o
CFLAGS_foo.o := <some-flags>
Here, the <some-flags> applies to both foo.o and dir/foo.o
The real world problem is:
scripts/kconfig/util.c
scripts/kconfig/lxdialog/util.c
Both files are compiled into scripts/kconfig/mconf, but only the
latter should be given with the ncurses flags.
It is more sensible to use the relative path to the Makefile, like this:
obj-y += foo.o
CFLAGS_foo.o := <some-flags>
obj-y += dir/foo.o
CFLAGS_dir/foo.o := <other-flags>
At first, I attempted to replace $(basetarget) with $*. The $* variable
is replaced with the stem ('%') part in a pattern rule. This works with
most of cases, but does not for explicit rules.
For example, arch/ia64/lib/Makefile reuses rule_as_o_S in its own
explicit rules, so $* will be empty, resulting in ignoring the per-file
AFLAGS.
I introduced a new variable, target-stem, which can be used also from
explicit rules.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Marc Zyngier <maz@kernel.org>
The only the difference between clean-files and clean-dirs is the -r
option passed to the 'rm' command.
You can always pass -r, and then remove the clean-dirs syntax.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
When we execute make after merging the configurations we ignore any
errors it produces causing whatever is running merge_config.sh to be
unaware of any failures. This issue was noticed by Guillaume Tucker
while looking at problems with testing of clang only builds in KernelCI
which caused Kbuild to be unable to find a working host compiler.
This implementation was suggested by Yamada-san.
Suggested-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reported-by: Guillaume Tucker <guillaume.tucker@collabora.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Prior to this commit, starting nconfig, xconfig or gconfig, and saving
the .config file more than once caused data loss, where a .config file
that contained only comments would be written to disk starting from the
second save operation.
This bug manifests itself because the SYMBOL_WRITTEN flag is never
cleared after the first call to conf_write, and subsequent calls to
conf_write then skip all of the configuration symbols due to the
SYMBOL_WRITTEN flag being set.
This commit resolves this issue by clearing the SYMBOL_WRITTEN flag
from all symbols before conf_write returns.
Fixes: 8e2442a5f8 ("kconfig: fix missing choice values in auto.conf")
Cc: linux-stable <stable@vger.kernel.org> # 4.19+
Signed-off-by: M. Vefa Bicakci <m.v.b@runbox.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Since commit 00c864f890 ("kconfig: allow all config targets to write
auto.conf if missing"), Kconfig creates include/config/auto.conf in the
defconfig stage when it is missing.
Joonas Kylmälä reported incorrect auto.conf generation under some
circumstances.
To reproduce it, apply the following diff:
| --- a/arch/arm/configs/imx_v6_v7_defconfig
| +++ b/arch/arm/configs/imx_v6_v7_defconfig
| @@ -345,14 +345,7 @@ CONFIG_USB_CONFIGFS_F_MIDI=y
| CONFIG_USB_CONFIGFS_F_HID=y
| CONFIG_USB_CONFIGFS_F_UVC=y
| CONFIG_USB_CONFIGFS_F_PRINTER=y
| -CONFIG_USB_ZERO=m
| -CONFIG_USB_AUDIO=m
| -CONFIG_USB_ETH=m
| -CONFIG_USB_G_NCM=m
| -CONFIG_USB_GADGETFS=m
| -CONFIG_USB_FUNCTIONFS=m
| -CONFIG_USB_MASS_STORAGE=m
| -CONFIG_USB_G_SERIAL=m
| +CONFIG_USB_FUNCTIONFS=y
| CONFIG_MMC=y
| CONFIG_MMC_SDHCI=y
| CONFIG_MMC_SDHCI_PLTFM=y
And then, run:
$ make ARCH=arm mrproper imx_v6_v7_defconfig
You will see CONFIG_USB_FUNCTIONFS=y is correctly contained in the
.config, but not in the auto.conf.
Please note drivers/usb/gadget/legacy/Kconfig is included from a choice
block in drivers/usb/gadget/Kconfig. So USB_FUNCTIONFS is a choice value.
This is probably a similar situation described in commit beaaddb625
("kconfig: tests: test defconfig when two choices interact").
When sym_calc_choice() is called, the choice symbol forgets the
SYMBOL_DEF_USER unless all of its choice values are explicitly set by
the user.
The choice symbol is given just one chance to recall it because
set_all_choice_values() is called if SYMBOL_NEED_SET_CHOICE_VALUES
is set.
When sym_calc_choice() is called again, the choice symbol forgets it
forever, since SYMBOL_NEED_SET_CHOICE_VALUES is a one-time aid.
Hence, we cannot call sym_clear_all_valid() again and again.
It is crazy to repeat set and unset of internal flags. However, we
cannot simply get rid of "sym->flags &= flags | ~SYMBOL_DEF_USER;"
Doing so would re-introduce the problem solved by commit 5d09598d48
("kconfig: fix new choices being skipped upon config update").
To work around the issue, conf_write_autoconf() stopped calling
sym_clear_all_valid().
conf_write() must be changed accordingly. Currently, it clears
SYMBOL_WRITE after the symbol is written into the .config file. This
is needed to prevent it from writing the same symbol multiple times in
case the symbol is declared in two or more locations. I added the new
flag SYMBOL_WRITTEN, to track the symbols that have been written.
Anyway, this is a cheesy workaround in order to suppress the issue
as far as defconfig is concerned.
Handling of choices is totally broken. sym_clear_all_valid() is called
every time a user touches a symbol from the GUI interface. To reproduce
it, just add a new symbol drivers/usb/gadget/legacy/Kconfig, then touch
around unrelated symbols from menuconfig. USB_FUNCTIONFS will disappear
from the .config file.
I added the Fixes tag since it is more fatal than before. But, this
has been broken since long long time before, and still it is.
We should take a closer look to fix this correctly somehow.
Fixes: 00c864f890 ("kconfig: allow all config targets to write auto.conf if missing")
Cc: linux-stable <stable@vger.kernel.org> # 4.19+
Reported-by: Joonas Kylmälä <joonas.kylmala@iki.fi>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Tested-by: Joonas Kylmälä <joonas.kylmala@iki.fi>
'make olddefconfig' is non-interactive, so we can drop 'yes'.
The behavior is equivalent.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
- always require argument for --defconfig and remove the hard-coded
arch/$(ARCH)/defconfig path
- make arch/$(SRCARCH)/configs/defconfig the new default of defconfig
- some code cleanups
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Merge tag 'kconfig-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kconfig updates from Masahiro Yamada:
- always require argument for --defconfig and remove the hard-coded
arch/$(ARCH)/defconfig path
- make arch/$(SRCARCH)/configs/defconfig the new default of defconfig
- some code cleanups
* tag 'kconfig-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
kconfig: remove meaningless if-conditional in conf_read()
kconfig: Fix spelling of sym_is_changable
unicore32: rename unicore32_defconfig to defconfig
kconfig: make arch/*/configs/defconfig the default of KBUILD_DEFCONFIG
kconfig: add static qualifier to expand_string()
kconfig: require the argument of --defconfig
kconfig: remove always false ifeq ($(KBUILD_DEFCONFIG,) conditional
sym_is_choice(sym) has already been checked by previous if-block:
if (sym_is_choice(sym) || (sym->flags & SYMBOL_NO_WRITE))
continue;
Hence, the following code is redundant, and the comment is misleading:
if (!sym_is_choice(sym))
continue;
/* fall through */
It always takes 'continue', never falls though.
Clean up the dead code.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
There is a spelling mistake in "changable", it is corrected to
"changeable" and all call sites are updated accordingly.
Signed-off-by: Marco Ammon <marco.ammon@fau.de>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
The kbuild documentation clearly shows that the documents
there are written at different times: some use markdown,
some use their own peculiar logic to split sections.
Convert everything to ReST without affecting too much
the author's style and avoiding adding uneeded markups.
The conversion is actually:
- add blank lines and identation in order to identify paragraphs;
- fix tables markups;
- add some lists markups;
- mark literal blocks;
- adjust title markups.
At its new index.rst, let's add a :orphan: while this is not linked to
the main index.rst file, in order to avoid build warnings.
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Until recently, if KBUILD_DEFCONFIG was not set by the arch Makefile,
the default path arch/*/defconfig was used.
The last users of the default are gone by the following commits:
- Commit f3e20ad67b ("s390: move arch/s390/defconfig to
arch/s390/configs/defconfig")
- Commit 986a13769c ("alpha: move arch/alpha/defconfig to
arch/alpha/configs/defconfig")
Let's set arch/*/configs/defconfig as a new default. This saves
KBUILD_DEFCONFIG for some architectures.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Currently, the argument for --defconfig is optional. If the argument
is not passed, the hard-coded default arch/$(ARCH)/defconfig is used.
It no longer happens in Linux since the last users of the default are
gone by the following commits:
- Commit f3e20ad67b ("s390: move arch/s390/defconfig to
arch/s390/configs/defconfig")
- Commit 986a13769c ("alpha: move arch/alpha/defconfig to
arch/alpha/configs/defconfig")
I want to kill the Linux-specific directory path embedded in the
Kconfig binary.
The --savedefconfig (reverse operation of --defconfig) requires an
argument, so it should not hurt to do likewise for --defconfig.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
With the following two commits applied, all the arch Makefiles
define KBUILD_DEFCONFIG.
- Commit f3e20ad67b ("s390: move arch/s390/defconfig to
arch/s390/configs/defconfig")
- Commit 986a13769c ("alpha: move arch/alpha/defconfig to
arch/alpha/configs/defconfig")
The first conditional in the defconfig rule is always false.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Adding SPDX license identifier is pretty safe; however, here is one
exception.
Since commit ec8f24b7fa ("treewide: Add SPDX license identifier -
Makefile/Kconfig"), "make testconfig" would not pass.
When Kconfig detects a circular file inclusion, it displays error
messages with a file name and a line number prefixed to each line.
The unit test checks if Kconfig emits the error messages correctly
(this also checks the line number correctness).
Now that the test input has the SPDX license identifier at the very top,
the line numbers in the expected stderr should be incremented by 1.
Fixes: ec8f24b7fa ("treewide: Add SPDX license identifier - Makefile/Kconfig")
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Add SPDX license identifiers to all Make/Kconfig files which:
- Have no license information of any form
These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:
GPL-2.0-only
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
'ifeq ... else ifneq ... endif' notation is supported by GNU Make 3.81
or later, which is the requirement for building the kernel since
commit 37d69ee308 ("docs: bump minimal GNU Make version to 3.81").
Use it to improve the readability.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Currently menu blocks start with a pretty header but end with nothing in
the generated config. So next config options stick together with the
options from the menu block.
Let's terminate menu blocks in the generated config with a comment and
a newline if needed. Example:
...
CONFIG_BPF_STREAM_PARSER=y
CONFIG_NET_FLOW_LIMIT=y
#
# Network testing
#
CONFIG_NET_PKTGEN=y
CONFIG_NET_DROP_MONITOR=y
# end of Network testing
# end of Networking options
CONFIG_HAMRADIO=y
...
Signed-off-by: Alexander Popov <alex.popov@linux.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Currently, the Kbuild core manipulates header search paths in a crazy
way [1].
To fix this mess, I want all Makefiles to add explicit $(srctree)/ to
the search paths in the srctree. Some Makefiles are already written in
that way, but not all. The goal of this work is to make the notation
consistent, and finally get rid of the gross hacks.
Having whitespaces after -I does not matter since commit 48f6e3cf5b
("kbuild: do not drop -I without parameter").
[1]: https://patchwork.kernel.org/patch/9632347/
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Valid pathnames will never exceed PATH_MAX, but these file names
are unsanitized and can cause buffer overflow if set incorrectly.
Use snprintf to avoid this. This was flagged during a Coverity scan
of the coreboot project, which also uses kconfig for its build system.
Signed-off-by: Jacob Garber <jgarber1@ualberta.ca>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
conf_write_dep() has just one caller:
conf_write_dep("include/config/auto.conf.cmd");
"name" always points to a valid string.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
With menuconfig / nconfig, users can input any file path from the
"Save" menu, but it fails if the parent directory does not exist.
Why not create the parent directory automatically. I think this is
a user-friendly behavior.
I changed the error messages in menuconfig / nconfig.
"Nonexistent directory" is no longer the most likely reason of the
failure. Perhaps, the user specified the existing directory, or
attempted to write to the location without write permission.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Kconfig updates the .config when it exits even if its content is
exactly the same as before. Since its timestamp becomes newer than
that of other build artifacts, additional processing is invoked,
which is annoying.
- syncconfig is invoked to update include/config/auto.conf, etc.
- kernel/configs.o is recompiled if CONFIG_IKCONFIG is enabled,
then vmlinux is relinked as well.
If the .config is not changed at all, we do not have to even
touch it. Just bail out showing "No change to .config".
$ make allmodconfig
scripts/kconfig/conf --allmodconfig Kconfig
#
# configuration written to .config
#
$ make allmodconfig
scripts/kconfig/conf --allmodconfig Kconfig
#
# No change to .config
#
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Currently, conf_write() can be called with a directory name instead
of a file name. As far as I see, this can happen for menuconfig,
nconfig, gconfig.
If it is given with a directory path, conf_write() kindly appends
getenv("KCONFIG_CONFIG"), but this ends up with hacky dir/basename
handling, and screwed up in corner-cases like "what if KCONFIG_CONFIG
is an absolute path?" as discussed before:
https://patchwork.kernel.org/patch/9910037/
Since conf_write() is already messed up, I'd say "do not do it".
Please pass a file path all the time. If a directory path is specified
for the configuration output, conf_write() will simply error out.
Now that the tmp file is created in the same directory as the .config,
the previously reported "what if KCONFIG_CONFIG points to a different
file system?" has been solved.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Nicolas Porcel <nicolasporcel06@gmail.com>
There are still some trailing whitespaces under scripts/kconfig/tests/,
but they must be kept. Otherwise, "make testconfig" would break.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Although it's not required for the build *conf-cfg.sh scripts to be
executable (they're run by CONFIG_SHELL), let's be consistent with other
scripts.
Signed-off-by: Petr Vorel <pvorel@suse.cz>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Backspace is not working on some terminal emulators which do not send the
key code defined by terminfo. Terminals either send '^H' (8) or '^?' (127).
But currently only '^?' is handled. Let's also handle '^H' for those
terminals.
Signed-off-by: Changbin Du <changbin.du@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
When this .gitignore was added, lxdialog was an independent hostprogs-y.
Now that all objects in lxdialog/ are directly linked to mconf, the
lxdialog is no longer generated.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
The 'Save As' menu of xconfig is not working; it always saves the
kernel configuration into the default file irrespective of the file
chosen in the dialog box.
The 'Save' menu always writes into the default file, but it would
make more sense to write into the file previously chosen by 'Load'
or 'Save As'.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
If you run "make" in a pristine source tree, currently Kbuild will
start to build Kconfig to let it show the error message.
It would be more straightforward to check it in Makefile and let
it fail immediately.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Masahiro Yamada
Thomas Hebb
Alyssa Ross
Laura Abbott
Geert Uytterhoeven
Masahiro Yamada
Guillaume Tucker
Mark Brown
M. Vefa Bicakci
Linus Torvalds
Marco Ammon
Mauro Carvalho Chehab
Thomas Gleixner
Alexander Popov
Jacob Garber
Petr Vorel
Changbin Du