restore documentation on the build config language
Kconfig-language.txt was deleted in commit 4fa499a17b
back in 2006.
Move to docs/ as suggested by Xabier Oneca:
http://lists.busybox.net/pipermail/busybox/2014-May/080914.html
Also update references to it everywhere.
Signed-off-by: Kartik Agaram <akkartik@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
parent
0972c7f7a5
commit
43b17b1cd0
@ -1,6 +1,6 @@
|
||||
#
|
||||
# For a description of the syntax of this configuration file,
|
||||
# see scripts/kbuild/config-language.txt.
|
||||
# see docs/Kconfig-language.txt.
|
||||
#
|
||||
|
||||
mainmenu "Configuration"
|
||||
|
@ -1,6 +1,6 @@
|
||||
#
|
||||
# For a description of the syntax of this configuration file,
|
||||
# see scripts/kbuild/config-language.txt.
|
||||
# see docs/Kconfig-language.txt.
|
||||
#
|
||||
|
||||
menu "Archival Utilities"
|
||||
|
@ -1,6 +1,6 @@
|
||||
#
|
||||
# For a description of the syntax of this configuration file,
|
||||
# see scripts/kbuild/config-language.txt.
|
||||
# see docs/Kconfig-language.txt.
|
||||
#
|
||||
|
||||
menu "Console Utilities"
|
||||
|
@ -1,6 +1,6 @@
|
||||
#
|
||||
# For a description of the syntax of this configuration file,
|
||||
# see scripts/kbuild/config-language.txt.
|
||||
# see docs/Kconfig-language.txt.
|
||||
#
|
||||
|
||||
menu "Coreutils"
|
||||
|
@ -1,6 +1,6 @@
|
||||
#
|
||||
# For a description of the syntax of this configuration file,
|
||||
# see scripts/kbuild/config-language.txt.
|
||||
# see docs/Kconfig-language.txt.
|
||||
#
|
||||
|
||||
menu "Debian Utilities"
|
||||
|
255
docs/Kconfig-language.txt
Normal file
255
docs/Kconfig-language.txt
Normal file
@ -0,0 +1,255 @@
|
||||
Introduction
|
||||
------------
|
||||
|
||||
The configuration database is collection of configuration options
|
||||
organized in a tree structure:
|
||||
|
||||
+- Code maturity level options
|
||||
| +- Prompt for development and/or incomplete code/drivers
|
||||
+- General setup
|
||||
| +- Networking support
|
||||
| +- System V IPC
|
||||
| +- BSD Process Accounting
|
||||
| +- Sysctl support
|
||||
+- Loadable module support
|
||||
| +- Enable loadable module support
|
||||
| +- Set version information on all module symbols
|
||||
| +- Kernel module loader
|
||||
+- ...
|
||||
|
||||
Every entry has its own dependencies. These dependencies are used
|
||||
to determine the visible of an entry. Any child entry is only
|
||||
visible if its parent entry is also visible.
|
||||
|
||||
Menu entries
|
||||
------------
|
||||
|
||||
Most entries define a config option, all other entries help to organize
|
||||
them. A single configuration option is defined like this:
|
||||
|
||||
config MODVERSIONS
|
||||
bool "Set version information on all module symbols"
|
||||
depends MODULES
|
||||
help
|
||||
Usually, modules have to be recompiled whenever you switch to a new
|
||||
kernel. ...
|
||||
|
||||
Every line starts with a key word and can be followed by multiple
|
||||
arguments. "config" starts a new config entry. The following lines
|
||||
define attributes for this config option. Attributes can be the type of
|
||||
the config option, input prompt, dependencies, help text and default
|
||||
values. A config option can be defined multiple times with the same
|
||||
name, but every definition can have only a single input prompt and the
|
||||
type must not conflict.
|
||||
|
||||
Menu attributes
|
||||
---------------
|
||||
|
||||
A menu entry can have a number of attributes. Not all of them are
|
||||
applicable everywhere (see syntax).
|
||||
|
||||
- type definition: "bool"/"tristate"/"string"/"hex"/"integer"
|
||||
Every config option must have a type. There are only two basic types:
|
||||
tristate and string, the other types base on these two. The type
|
||||
definition optionally accepts an input prompt, so these two examples
|
||||
are equivalent:
|
||||
|
||||
bool "Networking support"
|
||||
and
|
||||
bool
|
||||
prompt "Networking support"
|
||||
|
||||
- input prompt: "prompt" <prompt> ["if" <expr>]
|
||||
Every menu entry can have at most one prompt, which is used to display
|
||||
to the user. Optionally dependencies only for this prompt can be added
|
||||
with "if".
|
||||
|
||||
- default value: "default" <symbol> ["if" <expr>]
|
||||
A config option can have any number of default values. If multiple
|
||||
default values are visible, only the first defined one is active.
|
||||
Default values are not limited to the menu entry, where they are
|
||||
defined, this means the default can be defined somewhere else or be
|
||||
overridden by an earlier definition.
|
||||
The default value is only assigned to the config symbol if no other
|
||||
value was set by the user (via the input prompt above). If an input
|
||||
prompt is visible the default value is presented to the user and can
|
||||
be overridden by him.
|
||||
Optionally dependencies only for this default value can be added with
|
||||
"if".
|
||||
|
||||
- dependencies: "depends on"/"requires" <expr>
|
||||
This defines a dependency for this menu entry. If multiple
|
||||
dependencies are defined they are connected with '&&'. Dependencies
|
||||
are applied to all other options within this menu entry (which also
|
||||
accept "if" expression), so these two examples are equivalent:
|
||||
|
||||
bool "foo" if BAR
|
||||
default y if BAR
|
||||
and
|
||||
depends on BAR
|
||||
bool "foo"
|
||||
default y
|
||||
|
||||
- help text: "help"
|
||||
This defines a help text. The end of the help text is determined by
|
||||
the level indentation, this means it ends at the first line which has
|
||||
a smaller indentation than the first line of the help text.
|
||||
|
||||
|
||||
Menu dependencies
|
||||
-----------------
|
||||
|
||||
Dependencies define the visibility of a menu entry and can also reduce
|
||||
the input range of tristate symbols. The tristate logic used in the
|
||||
expressions uses one more state than normal boolean logic to express the
|
||||
module state. Dependency expressions have the following syntax:
|
||||
|
||||
<expr> ::= <symbol> (1)
|
||||
<symbol> '=' <symbol> (2)
|
||||
<symbol> '!=' <symbol> (3)
|
||||
'(' <expr> ')' (4)
|
||||
'!' <expr> (5)
|
||||
<expr> '||' <expr> (6)
|
||||
<expr> '&&' <expr> (7)
|
||||
|
||||
Expressions are listed in decreasing order of precedence.
|
||||
|
||||
(1) Convert the symbol into an expression. Boolean and tristate symbols
|
||||
are simply converted into the respective expression values. All
|
||||
other symbol types result in 'n'.
|
||||
(2) If the values of both symbols are equal, it returns 'y',
|
||||
otherwise 'n'.
|
||||
(3) If the values of both symbols are equal, it returns 'n',
|
||||
otherwise 'y'.
|
||||
(4) Returns the value of the expression. Used to override precedence.
|
||||
(5) Returns the result of (2-/expr/).
|
||||
(6) Returns the result of min(/expr/, /expr/).
|
||||
(7) Returns the result of max(/expr/, /expr/).
|
||||
|
||||
An expression can have a value of 'n', 'm' or 'y' (or 0, 1, 2
|
||||
respectively for calculations). A menu entry becomes visible when it's
|
||||
expression evaluates to 'm' or 'y'.
|
||||
|
||||
There are two type of symbols: constant and nonconstant symbols.
|
||||
Nonconstant symbols are the most common ones and are defined with the
|
||||
'config' statement. Nonconstant symbols consist entirely of alphanumeric
|
||||
characters or underscores.
|
||||
Constant symbols are only part of expressions. Constant symbols are
|
||||
always surrounded by single or double quotes. Within the quote any
|
||||
other character is allowed and the quotes can be escaped using '\'.
|
||||
|
||||
Menu structure
|
||||
--------------
|
||||
|
||||
The position of a menu entry in the tree is determined in two ways. First
|
||||
it can be specified explicitely:
|
||||
|
||||
menu "Network device support"
|
||||
depends NET
|
||||
|
||||
config NETDEVICES
|
||||
...
|
||||
|
||||
endmenu
|
||||
|
||||
All entries within the "menu" ... "endmenu" block become a submenu of
|
||||
"Network device support". All subentries inherit the dependencies from
|
||||
the menu entry, e.g. this means the dependency "NET" is added to the
|
||||
dependency list of the config option NETDEVICES.
|
||||
|
||||
The other way to generate the menu structure is done by analyzing the
|
||||
dependencies. If a menu entry somehow depends on the previous entry, it
|
||||
can be made a submenu of it. First the the previous (parent) symbol must
|
||||
be part of the dependency list and then one of these two condititions
|
||||
must be true:
|
||||
- the child entry must become invisible, if the parent is set to 'n'
|
||||
- the child entry must only be visible, if the parent is visible
|
||||
|
||||
config MODULES
|
||||
bool "Enable loadable module support"
|
||||
|
||||
config MODVERSIONS
|
||||
bool "Set version information on all module symbols"
|
||||
depends MODULES
|
||||
|
||||
comment "module support disabled"
|
||||
depends !MODULES
|
||||
|
||||
MODVERSIONS directly depends on MODULES, this means it's only visible if
|
||||
MODULES is different from 'n'. The comment on the other hand is always
|
||||
visible when MODULES it's visible (the (empty) dependency of MODULES is
|
||||
also part of the comment dependencies).
|
||||
|
||||
|
||||
Kconfig syntax
|
||||
--------------
|
||||
|
||||
The configuration file describes a series of menu entries, where every
|
||||
line starts with a keyword (except help texts). The following keywords
|
||||
end a menu entry:
|
||||
- config
|
||||
- choice/endchoice
|
||||
- comment
|
||||
- menu/endmenu
|
||||
- if/endif
|
||||
- source
|
||||
The first four also start the definition of a menu entry.
|
||||
|
||||
config:
|
||||
|
||||
"config" <symbol>
|
||||
<config options>
|
||||
|
||||
This defines a config symbol <symbol> and accepts any of above
|
||||
attributes as options.
|
||||
|
||||
choices:
|
||||
|
||||
"choice"
|
||||
<choice options>
|
||||
<choice block>
|
||||
"endchoice"
|
||||
|
||||
This defines a choice group and accepts any of above attributes as
|
||||
options. A choice can only be of type bool or tristate, while a boolean
|
||||
choice only allows a single config entry to be selected, a tristate
|
||||
choice also allows any number of config entries to be set to 'm'. This
|
||||
can be used if multiple drivers for a single hardware exists and only a
|
||||
single driver can be compiled/loaded into the kernel, but all drivers
|
||||
can be compiled as modules.
|
||||
A choice accepts another option "optional", which allows to set the
|
||||
choice to 'n' and no entry needs to be selected.
|
||||
|
||||
comment:
|
||||
|
||||
"comment" <prompt>
|
||||
<comment options>
|
||||
|
||||
This defines a comment which is displayed to the user during the
|
||||
configuration process and is also echoed to the output files. The only
|
||||
possible options are dependencies.
|
||||
|
||||
menu:
|
||||
|
||||
"menu" <prompt>
|
||||
<menu options>
|
||||
<menu block>
|
||||
"endmenu"
|
||||
|
||||
This defines a menu block, see "Menu structure" above for more
|
||||
information. The only possible options are dependencies.
|
||||
|
||||
if:
|
||||
|
||||
"if" <expr>
|
||||
<if block>
|
||||
"endif"
|
||||
|
||||
This defines an if block. The dependency expression <expr> is appended
|
||||
to all enclosed menu entries.
|
||||
|
||||
source:
|
||||
|
||||
"source" <prompt>
|
||||
|
||||
This reads the specified configuration file. This file is always parsed.
|
@ -1,6 +1,6 @@
|
||||
#
|
||||
# For a description of the syntax of this configuration file,
|
||||
# see scripts/kbuild/config-language.txt.
|
||||
# see docs/Kconfig-language.txt.
|
||||
#
|
||||
|
||||
menu "Linux Ext2 FS Progs"
|
||||
|
@ -1,6 +1,6 @@
|
||||
#
|
||||
# For a description of the syntax of this configuration file,
|
||||
# see scripts/kbuild/config-language.txt.
|
||||
# see docs/Kconfig-language.txt.
|
||||
#
|
||||
|
||||
menu "Editors"
|
||||
|
@ -1,6 +1,6 @@
|
||||
#
|
||||
# For a description of the syntax of this configuration file,
|
||||
# see scripts/kbuild/config-language.txt.
|
||||
# see docs/Kconfig-language.txt.
|
||||
#
|
||||
|
||||
menu "Finding Utilities"
|
||||
|
@ -1,6 +1,6 @@
|
||||
#
|
||||
# For a description of the syntax of this configuration file,
|
||||
# see scripts/kbuild/config-language.txt.
|
||||
# see docs/Kconfig-language.txt.
|
||||
#
|
||||
|
||||
menu "Init Utilities"
|
||||
|
@ -1,6 +1,6 @@
|
||||
#
|
||||
# For a description of the syntax of this configuration file,
|
||||
# see scripts/kbuild/config-language.txt.
|
||||
# see docs/Kconfig-language.txt.
|
||||
#
|
||||
|
||||
menu "klibc-utils"
|
||||
|
@ -1,6 +1,6 @@
|
||||
#
|
||||
# For a description of the syntax of this configuration file,
|
||||
# see scripts/kbuild/config-language.txt.
|
||||
# see docs/Kconfig-language.txt.
|
||||
#
|
||||
|
||||
comment "Library Tuning"
|
||||
|
@ -1,6 +1,6 @@
|
||||
#
|
||||
# For a description of the syntax of this configuration file,
|
||||
# see scripts/kbuild/config-language.txt.
|
||||
# see docs/Kconfig-language.txt.
|
||||
#
|
||||
|
||||
menu "Login/Password Management Utilities"
|
||||
|
@ -1,6 +1,6 @@
|
||||
#
|
||||
# For a description of the syntax of this configuration file,
|
||||
# see scripts/kbuild/config-language.txt.
|
||||
# see docs/Kconfig-language.txt.
|
||||
#
|
||||
|
||||
menu "Miscellaneous Utilities"
|
||||
|
@ -1,6 +1,6 @@
|
||||
#
|
||||
# For a description of the syntax of this configuration file,
|
||||
# see scripts/kbuild/config-language.txt.
|
||||
# see docs/Kconfig-language.txt.
|
||||
#
|
||||
|
||||
menu "Linux Module Utilities"
|
||||
|
@ -1,6 +1,6 @@
|
||||
#
|
||||
# For a description of the syntax of this configuration file,
|
||||
# see scripts/kbuild/config-language.txt.
|
||||
# see docs/Kconfig-language.txt.
|
||||
#
|
||||
|
||||
menu "Networking Utilities"
|
||||
|
@ -1,6 +1,6 @@
|
||||
#
|
||||
# For a description of the syntax of this configuration file,
|
||||
# see scripts/kbuild/config-language.txt.
|
||||
# see docs/Kconfig-language.txt.
|
||||
#
|
||||
|
||||
config UDHCPD
|
||||
|
@ -1,6 +1,6 @@
|
||||
#
|
||||
# For a description of the syntax of this configuration file,
|
||||
# see scripts/kbuild/config-language.txt.
|
||||
# see docs/Kconfig-language.txt.
|
||||
#
|
||||
|
||||
menu "Print Utilities"
|
||||
|
@ -1,6 +1,6 @@
|
||||
#
|
||||
# For a description of the syntax of this configuration file,
|
||||
# see scripts/kbuild/config-language.txt.
|
||||
# see docs/Kconfig-language.txt.
|
||||
#
|
||||
|
||||
menu "Process Utilities"
|
||||
|
@ -1,6 +1,6 @@
|
||||
#
|
||||
# For a description of the syntax of this configuration file,
|
||||
# see scripts/kbuild/config-language.txt.
|
||||
# see docs/Kconfig-language.txt.
|
||||
#
|
||||
|
||||
menu "Runit Utilities"
|
||||
|
@ -1,6 +1,6 @@
|
||||
#
|
||||
# For a description of the syntax of this configuration file,
|
||||
# see scripts/kbuild/config-language.txt.
|
||||
# see docs/Kconfig-language.txt.
|
||||
#
|
||||
|
||||
menu "SELinux Utilities"
|
||||
|
@ -1,6 +1,6 @@
|
||||
#
|
||||
# For a description of the syntax of this configuration file,
|
||||
# see scripts/kbuild/config-language.txt.
|
||||
# see docs/Kconfig-language.txt.
|
||||
#
|
||||
|
||||
menu "Shells"
|
||||
|
@ -1,6 +1,6 @@
|
||||
#
|
||||
# For a description of the syntax of this configuration file,
|
||||
# see scripts/kbuild/config-language.txt.
|
||||
# see docs/Kconfig-language.txt.
|
||||
#
|
||||
|
||||
menu "System Logging Utilities"
|
||||
|
@ -1,6 +1,6 @@
|
||||
#
|
||||
# For a description of the syntax of this configuration file,
|
||||
# see scripts/kbuild/config-language.txt.
|
||||
# see docs/Kconfig-language.txt.
|
||||
#
|
||||
|
||||
menu "Linux System Utilities"
|
||||
|
@ -1,6 +1,6 @@
|
||||
#
|
||||
# For a description of the syntax of this configuration file,
|
||||
# see scripts/kbuild/config-language.txt.
|
||||
# see docs/Kconfig-language.txt.
|
||||
#
|
||||
|
||||
config VOLUMEID
|
||||
|
Loading…
Reference in New Issue
Block a user