KCONFIG-TWEAK(1)

KCONFIG-TWEAK(1) 💅

okay so bestie, welcome to the kconfig-tweak man page — yes that's the manual name, we're keeping it, it's iconic ✨ — and she's here to walk you through the whole standalone implementation of the Linux Kconfig parser situation. no cap, it's giving "I read the kernel docs so you don't have to" 🎀

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✨ SYNOPSIS ✨

kconfig-tweak [options] <KConfig_file>

literally that's it. options, then your KConfig file. slay.

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🌸 DESCRIPTION 🌸

the kconfig toolkit is out here supporting the Kconfig language, bestie — it implements the parser and the configuration support that goes with the KConfig files, and it respects the Linux kernel KConfig convention the whole way through. periodt. 👑

at configuration time 🕐:

• kconfig-mconf — this one is based on ncurses (menuconfig)
• kconfig-conf — this one is based on dialog (config)
• kconfig-gconf — and this one is based on GTK+ (gconfig)

associated tools 🧰:

• kconfig-diff — displays symbols diff between .config files

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👑 OPTIONS 👑

• --silentoldconfig — only for kconfig-conf; reloads a given .config and regenerates the header and command files accordingly. main character energy fr.
• --allnoconfig — sets all boolean configuration to no.
• --allyesconfig — sets all boolean configuration to yes.
• --randconfig — generates a random configuration. chaos, but make it config 🎲

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🦋 ENVIRONMENT 🦋

environment variables for '*config'

• KCONFIG_CONFIG — this environment variable can be used to specify a default kernel config file name, so you can override the default name of ".config".
• KCONFIG_OVERWRITECONFIG — if you set KCONFIG_OVERWRITECONFIG in the environment, Kconfig will not break symlinks when .config is a symlink to somewhere else. bestie protect the symlinks 💖
• CONFIG_ — if you set CONFIG_ in the environment, Kconfig will prefix all symbols with its value when saving the configuration, instead of using the default, "CONFIG_".

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environment variables for '{allyes/allmod/allno/rand}config'

• KCONFIG_ALLCONFIG — the allyesconfig/allmodconfig/allnoconfig/randconfig variants can also use the environment variable KCONFIG_ALLCONFIG as a flag or a filename that contains config symbols that the user requires to be set to a specific value. if KCONFIG_ALLCONFIG is used without a filename where KCONFIG_ALLCONFIG == "" or KCONFIG_ALLCONFIG == "1", make *config checks for a file named "all{yes/mod/no/def/random}.config" (corresponding to the *config command that was used) for symbol values that are to be forced. if this file is not found, it checks for a file named "all.config" to contain forced values.

this enables you to create "miniature" config (miniconfig) or custom config files containing just the config symbols that you are interested in. then the kernel config system generates the full .config file, including symbols of your miniconfig file.

this 'KCONFIG_ALLCONFIG' file is a config file which contains (usually a subset of all) preset config symbols. these variable settings are still subject to normal dependency checks. no skipping the vibe check 🫶

Examples:

KCONFIG_ALLCONFIG=custom-notebook.config make allnoconfig or
KCONFIG_ALLCONFIG=mini.config make allnoconfig or
make KCONFIG_ALLCONFIG=mini.config allnoconfig

these examples will disable most options (allnoconfig) but enable or disable the options that are explicitly listed in the specified mini-config files.

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environment variables for 'randconfig'

• KCONFIG_SEED — you can set this to the integer value used to seed the RNG, if you want to somehow debug the behaviour of the kconfig parser/frontends. if not set, the current time will be used.
• KCONFIG_PROBABILITY — this variable can be used to skew the probabilities. see /usr/share/doc/kconfig-frontends/kconfig.txt.gz. go read it, iykyk 📖

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environment variables for 'silentoldconfig'

• KCONFIG_NOSILENTUPDATE — if this variable has a non-blank value, it prevents silent kernel config updates (requires explicit updates). no sneaky updates allowed 🙈
• KCONFIG_AUTOCONFIG — this environment variable can be set to specify the path name of the "auto.conf" file. its default value is "include/config/auto.conf".
• KCONFIG_TRISTATE — this environment variable can be set to specify the path name of the "tristate.conf" file. its default value is "include/config/tristate.conf".
• KCONFIG_AUTOHEADER — this environment variable can be set to specify the path name of the "autoconf.h" (header) file. its default value is "include/generated/autoconf.h".

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💜 HISTORY 💜

June 2017, man page originally compiled by Philippe Thierry (phil at reseau-libre dot com)

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so yeah, that's the whole page. source/version vibes: Philippe Thierry — kconfig-tweak Man Page — KCONFIG-TWEAK(1), and the date on this beauty is October 2017 🎀✨ obsessed, honestly. now go configure something, bestie 💅