Makefile: ensure image directory exists

[kconfig-frontends] / docs / kconfig.txt

diff --git a/docs/kconfig.txt b/docs/kconfig.txt
index b8b77bbc784fa4179184b4eb6c7036968cd548ad..bbc99c0c1094949d8dd36f68f2516e8fb879b0e4 100644 (file)
--- a/docs/kconfig.txt
+++ b/docs/kconfig.txt
@@ -20,16 +20,9 @@ symbols have been introduced.
 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
 
@@ -89,6 +82,42 @@ These examples will disable most options (allnoconfig) but enable or
 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'
 
@@ -129,7 +158,7 @@ Searching in menuconfig:
        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
@@ -138,6 +167,17 @@ Searching in menuconfig:
 
                /^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'