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911a91c39c
As commit cedd55d49d ("kconfig: Remove silentoldconfig from help
and docs; fix kconfig/conf's help") mentioned, 'silentoldconfig' is a
historical misnomer. That commit removed it from help and docs since
it is an internal interface. If so, it should be allowed to rename
it to something more intuitive. 'syncconfig' is the one I came up
with because it updates the .config if necessary, then synchronize
include/generated/autoconf.h and include/config/* with it.
You should not manually invoke 'silentoldcofig'. Display warning if
used in case existing scripts are doing wrong.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
238 lines
8.6 KiB
Plaintext
238 lines
8.6 KiB
Plaintext
This file contains some assistance for using "make *config".
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Use "make help" to list all of the possible configuration targets.
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The xconfig ('qconf') and menuconfig ('mconf') programs also
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have embedded help text. Be sure to check it for navigation,
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search, and other general help text.
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======================================================================
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General
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--------------------------------------------------
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New kernel releases often introduce new config symbols. Often more
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important, new kernel releases may rename config symbols. When
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this happens, using a previously working .config file and running
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"make oldconfig" won't necessarily produce a working new kernel
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for you, so you may find that you need to see what NEW kernel
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symbols have been introduced.
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To see a list of new config symbols when using "make oldconfig", use
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cp user/some/old.config .config
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make listnewconfig
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and the config program will list any new symbols, one per line.
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scripts/diffconfig .config.old .config | less
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______________________________________________________________________
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Environment variables for '*config'
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KCONFIG_CONFIG
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--------------------------------------------------
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This environment variable can be used to specify a default kernel config
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file name to override the default name of ".config".
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KCONFIG_OVERWRITECONFIG
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--------------------------------------------------
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If you set KCONFIG_OVERWRITECONFIG in the environment, Kconfig will not
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break symlinks when .config is a symlink to somewhere else.
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CONFIG_
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--------------------------------------------------
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If you set CONFIG_ in the environment, Kconfig will prefix all symbols
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with its value when saving the configuration, instead of using the default,
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"CONFIG_".
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______________________________________________________________________
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Environment variables for '{allyes/allmod/allno/rand}config'
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KCONFIG_ALLCONFIG
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--------------------------------------------------
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(partially based on lkml email from/by Rob Landley, re: miniconfig)
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--------------------------------------------------
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The allyesconfig/allmodconfig/allnoconfig/randconfig variants can also
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use the environment variable KCONFIG_ALLCONFIG as a flag or a filename
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that contains config symbols that the user requires to be set to a
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specific value. If KCONFIG_ALLCONFIG is used without a filename where
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KCONFIG_ALLCONFIG == "" or KCONFIG_ALLCONFIG == "1", "make *config"
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checks for a file named "all{yes/mod/no/def/random}.config"
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(corresponding to the *config command that was used) for symbol values
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that are to be forced. If this file is not found, it checks for a
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file named "all.config" to contain forced values.
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This enables you to create "miniature" config (miniconfig) or custom
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config files containing just the config symbols that you are interested
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in. Then the kernel config system generates the full .config file,
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including symbols of your miniconfig file.
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This 'KCONFIG_ALLCONFIG' file is a config file which contains
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(usually a subset of all) preset config symbols. These variable
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settings are still subject to normal dependency checks.
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Examples:
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KCONFIG_ALLCONFIG=custom-notebook.config make allnoconfig
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or
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KCONFIG_ALLCONFIG=mini.config make allnoconfig
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or
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make KCONFIG_ALLCONFIG=mini.config allnoconfig
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These examples will disable most options (allnoconfig) but enable or
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disable the options that are explicitly listed in the specified
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mini-config files.
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______________________________________________________________________
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Environment variables for 'randconfig'
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KCONFIG_SEED
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--------------------------------------------------
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You can set this to the integer value used to seed the RNG, if you want
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to somehow debug the behaviour of the kconfig parser/frontends.
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If not set, the current time will be used.
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KCONFIG_PROBABILITY
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--------------------------------------------------
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This variable can be used to skew the probabilities. This variable can
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be unset or empty, or set to three different formats:
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KCONFIG_PROBABILITY y:n split y:m:n split
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-----------------------------------------------------------------
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unset or empty 50 : 50 33 : 33 : 34
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N N : 100-N N/2 : N/2 : 100-N
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[1] N:M N+M : 100-(N+M) N : M : 100-(N+M)
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[2] N:M:L N : 100-N M : L : 100-(M+L)
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where N, M and L are integers (in base 10) in the range [0,100], and so
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that:
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[1] N+M is in the range [0,100]
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[2] M+L is in the range [0,100]
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Examples:
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KCONFIG_PROBABILITY=10
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10% of booleans will be set to 'y', 90% to 'n'
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5% of tristates will be set to 'y', 5% to 'm', 90% to 'n'
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KCONFIG_PROBABILITY=15:25
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40% of booleans will be set to 'y', 60% to 'n'
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15% of tristates will be set to 'y', 25% to 'm', 60% to 'n'
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KCONFIG_PROBABILITY=10:15:15
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10% of booleans will be set to 'y', 90% to 'n'
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15% of tristates will be set to 'y', 15% to 'm', 70% to 'n'
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______________________________________________________________________
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Environment variables for 'syncconfig'
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KCONFIG_NOSILENTUPDATE
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--------------------------------------------------
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If this variable has a non-blank value, it prevents silent kernel
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config updates (requires explicit updates).
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KCONFIG_AUTOCONFIG
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--------------------------------------------------
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This environment variable can be set to specify the path & name of the
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"auto.conf" file. Its default value is "include/config/auto.conf".
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KCONFIG_TRISTATE
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--------------------------------------------------
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This environment variable can be set to specify the path & name of the
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"tristate.conf" file. Its default value is "include/config/tristate.conf".
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KCONFIG_AUTOHEADER
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--------------------------------------------------
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This environment variable can be set to specify the path & name of the
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"autoconf.h" (header) file.
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Its default value is "include/generated/autoconf.h".
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======================================================================
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menuconfig
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--------------------------------------------------
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SEARCHING for CONFIG symbols
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Searching in menuconfig:
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The Search function searches for kernel configuration symbol
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names, so you have to know something close to what you are
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looking for.
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Example:
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/hotplug
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This lists all config symbols that contain "hotplug",
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e.g., HOTPLUG_CPU, MEMORY_HOTPLUG.
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For search help, enter / followed TAB-TAB-TAB (to highlight
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<Help>) and Enter. This will tell you that you can also use
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regular expressions (regexes) in the search string, so if you
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are not interested in MEMORY_HOTPLUG, you could try
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/^hotplug
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When searching, symbols are sorted thus:
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- first, exact matches, sorted alphabetically (an exact match
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is when the search matches the complete symbol name);
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- then, other matches, sorted alphabetically.
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For example: ^ATH.K matches:
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ATH5K ATH9K ATH5K_AHB ATH5K_DEBUG [...] ATH6KL ATH6KL_DEBUG
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[...] ATH9K_AHB ATH9K_BTCOEX_SUPPORT ATH9K_COMMON [...]
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of which only ATH5K and ATH9K match exactly and so are sorted
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first (and in alphabetical order), then come all other symbols,
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sorted in alphabetical order.
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______________________________________________________________________
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User interface options for 'menuconfig'
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MENUCONFIG_COLOR
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--------------------------------------------------
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It is possible to select different color themes using the variable
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MENUCONFIG_COLOR. To select a theme use:
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make MENUCONFIG_COLOR=<theme> menuconfig
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Available themes are:
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mono => selects colors suitable for monochrome displays
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blackbg => selects a color scheme with black background
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classic => theme with blue background. The classic look
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bluetitle => a LCD friendly version of classic. (default)
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MENUCONFIG_MODE
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--------------------------------------------------
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This mode shows all sub-menus in one large tree.
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Example:
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make MENUCONFIG_MODE=single_menu menuconfig
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======================================================================
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xconfig
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--------------------------------------------------
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Searching in xconfig:
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The Search function searches for kernel configuration symbol
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names, so you have to know something close to what you are
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looking for.
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Example:
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Ctrl-F hotplug
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or
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Menu: File, Search, hotplug
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lists all config symbol entries that contain "hotplug" in
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the symbol name. In this Search dialog, you may change the
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config setting for any of the entries that are not grayed out.
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You can also enter a different search string without having
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to return to the main menu.
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======================================================================
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gconfig
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--------------------------------------------------
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Searching in gconfig:
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None (gconfig isn't maintained as well as xconfig or menuconfig);
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however, gconfig does have a few more viewing choices than
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xconfig does.
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###
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