linux.git/scripts/kconfig/zconf.gperf, branch master

Remove gperf usage from toolchain

2017-08-19T18:02:53+00:00

It turns out that gperf-3.1 changed types in the generated code in ways
that aren't even trivially detectable without having to generate a test-file.

It's just not worth using tools and libraries from clowns that don't
understand or care about compatibility.  So get rid of gperf.

Signed-off-by: Linus Torvalds

Kconfig: Introduce the "imply" keyword

2016-11-16T08:26:33+00:00

The "imply" keyword is a weak version of "select" where the target
config symbol can still be turned off, avoiding those pitfalls that come
with the "select" keyword.

This is useful e.g. with multiple drivers that want to indicate their
ability to hook into a secondary subsystem while allowing the user to
configure that subsystem out without also having to unset these drivers.

Currently, the same effect can almost be achieved with:

config DRIVER_A
	tristate

config DRIVER_B
	tristate

config DRIVER_C
	tristate

config DRIVER_D
	tristate

[...]

config SUBSYSTEM_X
	tristate
	default DRIVER_A || DRIVER_B || DRIVER_C || DRIVER_D || [...]

This is unwieldy to maintain especially with a large number of drivers.
Furthermore, there is no easy way to restrict the choice for SUBSYSTEM_X
to y or n, excluding m, when some drivers are built-in. The "select"
keyword allows for excluding m, but it excludes n as well. Hence
this "imply" keyword.  The above becomes:

config DRIVER_A
	tristate
	imply SUBSYSTEM_X

config DRIVER_B
	tristate
	imply SUBSYSTEM_X

[...]

config SUBSYSTEM_X
	tristate

This is much cleaner, and way more flexible than "select". SUBSYSTEM_X
can still be configured out, and it can be set as a module when none of
the drivers are configured in or all of them are modular.

Signed-off-by: Nicolas Pitre 
Acked-by: Richard Cochran 
Acked-by: Thomas Gleixner 
Acked-by: John Stultz 
Reviewed-by: Josh Triplett 
Cc: Paul Bolle 
Cc: linux-kbuild@vger.kernel.org
Cc: netdev@vger.kernel.org
Cc: Michal Marek 
Cc: Edward Cree 
Link: http://lkml.kernel.org/r/1478841010-28605-2-git-send-email-nicolas.pitre@linaro.org
Signed-off-by: Thomas Gleixner

kconfig: warn of unhandled characters in Kconfig commands

2015-08-19T15:05:39+00:00

In Kconfig, definitions of options take the following form:
"   ...". COMMANDs and PARAMs are treated
slightly different by the underlying parser.

While commit 2e0d737fc76f ("kconfig: don't silently ignore unhandled
characters") introduced a warning for unsupported characters around
PARAMs, it does not cover situations where a COMMAND has additional
characters before it.

This change makes Kconfig emit a warning if superfluous characters
are found before COMMANDs. As the 'help' statement sometimes is
written as '---help---', the '-' character would now also be regarded
as unhandled and generate a warning. To avoid that, '-' is added to
the list of allowed characters, and the token '---help---' is included
in the zconf.gperf file.

Reported-by: Valentin Rothberg 
Signed-off-by: Andreas Ruprecht 
Reviewed-by: Ulf Magnusson 
Tested-by: Ulf Magnusson 
Signed-off-by: Michal Marek

kconfig: make allnoconfig disable options behind EMBEDDED and EXPERT

2014-04-07T23:36:09+00:00

"make allnoconfig" exists to ease testing of minimal configurations.
Documentation/SubmitChecklist includes a note to test with allnoconfig.
This helps catch missing dependencies on common-but-not-required
functionality, which might otherwise go unnoticed.

However, allnoconfig still leaves many symbols enabled, because they're
hidden behind CONFIG_EMBEDDED or CONFIG_EXPERT.  For instance, allnoconfig
still has CONFIG_PRINTK and CONFIG_BLOCK enabled, so drivers don't
typically get build-tested with those disabled.

To address this, introduce a new Kconfig option "allnoconfig_y", used on
symbols which only exist to hide other symbols.  Set it on CONFIG_EMBEDDED
(which then selects CONFIG_EXPERT).  allnoconfig will then disable all the
symbols hidden behind those.

Signed-off-by: Josh Triplett 
Tested-by: Paul E. McKenney 
Cc: Michal Marek 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

kconfig: constify `kconf_id_lookup'

2011-06-09T18:04:42+00:00

Signed-off-by: Arnaud Lacombe

kconfig: add an option to determine a menu's visibility

2010-11-22T13:27:17+00:00

This option is aimed to add the possibility to control a menu's visibility
without adding dependency to the expression to all the submenu.

Signed-off-by: Arnaud Lacombe 
Acked-by: Mauro Carvalho Chehab 
Tested-by: Mauro Carvalho Chehab 
Signed-off-by: Mauro Carvalho Chehab

kconfig: Mark various internal functions static

2009-11-15T23:00:16+00:00

kconfig's keyword hash, lexer, and parser define various functions used
only locally.  Declare these functions as static, and regenerate the
corresponding generated files.

Signed-off-by: Josh Triplett

kconfig: remove "enable"

2008-01-28T22:21:18+00:00

Kconfig had a synonym "enable" for "select" that was neither documented
nor used.

Signed-off-by: Adrian Bunk 
Cc: Roman Zippel 
Signed-off-by: Sam Ravnborg

kconfig: environment symbol support

2008-01-28T22:14:39+00:00

Add the possibility to import a value from the environment into kconfig
via the option syntax. Beside flexibility this has the advantage
providing proper dependencies.
Documented the options syntax.

Signed-off-by: Roman Zippel 
Signed-off-by: Sam Ravnborg

kconfig: syntax cleanup - drop support for "depends/requires/def_boolean"

2007-10-12T19:20:32+00:00

Remove the following redundant and never or rarely used kconfig syntax:

- "def_boolean" (same as "def_bool")
- "requires" (same as "depends on")
- "depends" (same as "depends on")

This patch contains the code changes and Kconfig updates.
The shipped files are in next patch to let actual codechange stand out.

Signed-off-by: Adrian Bunk 
Cc: "Randy.Dunlap" 
Cc: Bryan Wu 
Cc: Paul Mackerras 
Cc: Benjamin Herrenschmidt 
Cc: Dmitry Torokhov 
Cc: "John W. Linville" 
Cc: Roman Zippel 
Cc: Richard Purdie 
Signed-off-by: Andrew Morton 
Signed-off-by: Sam Ravnborg