To see a list of new config symbols when using "make oldconfig", use
cp user/some/old.config .config
- yes "" | make oldconfig >conf.new
+ make listnewconfig
-and the config program will list as (NEW) any new symbols that have
-unknown values. Of course, the .config file is also updated with
-new (default) values, so you can use:
-
- grep "(NEW)" conf.new
-
-to see the new config symbols or you can use diffconfig to see the
-differences between the previous and new .config files:
+and the config program will list any new symbols, one per line.
scripts/diffconfig .config.old .config | less
If you set KCONFIG_OVERWRITECONFIG in the environment, Kconfig will not
break symlinks when .config is a symlink to somewhere else.
+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_".
+
______________________________________________________________________
Environment variables for '{allyes/allmod/allno/rand}config'
--------------------------------------------------
(partially based on lkml email from/by Rob Landley, re: miniconfig)
--------------------------------------------------
-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, "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.
+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
disable the options that are explicitly listed in the specified
mini-config files.
+______________________________________________________________________
+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. This variable can
+be unset or empty, or set to three different formats:
+ KCONFIG_PROBABILITY y:n split y:m:n split
+ -----------------------------------------------------------------
+ unset or empty 50 : 50 33 : 33 : 34
+ N N : 100-N N/2 : N/2 : 100-N
+ [1] N:M N+M : 100-(N+M) N : M : 100-(N+M)
+ [2] N:M:L N : 100-N M : L : 100-(M+L)
+
+where N, M and L are integers (in base 10) in the range [0,100], and so
+that:
+ [1] N+M is in the range [0,100]
+ [2] M+L is in the range [0,100]
+
+Examples:
+ KCONFIG_PROBABILITY=10
+ 10% of booleans will be set to 'y', 90% to 'n'
+ 5% of tristates will be set to 'y', 5% to 'm', 90% to 'n'
+ KCONFIG_PROBABILITY=15:25
+ 40% of booleans will be set to 'y', 60% to 'n'
+ 15% of tristates will be set to 'y', 25% to 'm', 60% to 'n'
+ KCONFIG_PROBABILITY=10:15:15
+ 10% of booleans will be set to 'y', 90% to 'n'
+ 15% of tristates will be set to 'y', 15% to 'm', 70% to 'n'
+
______________________________________________________________________
Environment variables for 'silentoldconfig'
Example:
/hotplug
This lists all config symbols that contain "hotplug",
- e.g., HOTPLUG, HOTPLUG_CPU, MEMORY_HOTPLUG.
+ e.g., HOTPLUG_CPU, MEMORY_HOTPLUG.
For search help, enter / followed TAB-TAB-TAB (to highlight
<Help>) and Enter. This will tell you that you can also use
/^hotplug
+ When searching, symbols are sorted thus:
+ - first, exact matches, sorted alphabetically (an exact match
+ is when the search matches the complete symbol name);
+ - then, other matches, sorted alphabetically.
+ For example: ^ATH.K matches:
+ ATH5K ATH9K ATH5K_AHB ATH5K_DEBUG [...] ATH6KL ATH6KL_DEBUG
+ [...] ATH9K_AHB ATH9K_BTCOEX_SUPPORT ATH9K_COMMON [...]
+ of which only ATH5K and ATH9K match exactly and so are sorted
+ first (and in alphabetical order), then come all other symbols,
+ sorted in alphabetical order.
+
______________________________________________________________________
User interface options for 'menuconfig'
projects / kconfig-frontends / blobdiff