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191 lines
6.7 KiB
191 lines
6.7 KiB
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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yes "" | make oldconfig >conf.new |
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and the config program will list as (NEW) any new symbols that have |
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unknown values. Of course, the .config file is also updated with |
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new (default) values, so you can use: |
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grep "(NEW)" conf.new |
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to see the new config symbols or you can use diffconfig to see the |
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differences between the previous and new .config files: |
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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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______________________________________________________________________ |
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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 'silentoldconfig' |
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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, 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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______________________________________________________________________ |
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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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