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| author | Dirk Gouders <dirk@gouders.net> | 2016-04-29 12:43:38 +0200 |
|---|---|---|
| committer | Michal Marek <mmarek@suse.com> | 2016-05-10 17:30:14 +0200 |
| commit | 032a3187194e050383d7c2df804b194b6fecc6f3 (patch) | |
| tree | 9920a4ba1e08d6cac24130fab394909aa15f2b15 /Documentation/kbuild | |
| parent | kconfig-language: fix comment on dependency-generated menu structures. (diff) | |
| download | linux-032a3187194e050383d7c2df804b194b6fecc6f3.tar.xz linux-032a3187194e050383d7c2df804b194b6fecc6f3.zip | |
kconfig-language: elaborate on the type of a choice
The type of a choice can be specified explicitely or it will be
set according to members of the choice group, see menu.c:menu_finalize().
Signed-off-by: Dirk Gouders <dirk@gouders.net>
Signed-off-by: Michal Marek <mmarek@suse.com>
Diffstat (limited to 'Documentation/kbuild')
| -rw-r--r-- | Documentation/kbuild/kconfig-language.txt | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/Documentation/kbuild/kconfig-language.txt b/Documentation/kbuild/kconfig-language.txt index 14dd13150aa3..db101857b2c9 100644 --- a/Documentation/kbuild/kconfig-language.txt +++ b/Documentation/kbuild/kconfig-language.txt @@ -284,12 +284,17 @@ choices: "endchoice" This defines a choice group and accepts any of the above attributes as -options. A choice can only be of type bool or tristate, while a boolean -choice only allows a single config entry to be selected, a tristate -choice also allows any number of config entries to be set to 'm'. This -can be used if multiple drivers for a single hardware exists and only a -single driver can be compiled/loaded into the kernel, but all drivers -can be compiled as modules. +options. A choice can only be of type bool or tristate. If no type is +specified for a choice, it's type will be determined by the type of +the first choice element in the group or remain unknown if none of the +choice elements have a type specified, as well. + +While a boolean choice only allows a single config entry to be +selected, a tristate choice also allows any number of config entries +to be set to 'm'. This can be used if multiple drivers for a single +hardware exists and only a single driver can be compiled/loaded into +the kernel, but all drivers can be compiled as modules. + A choice accepts another option "optional", which allows to set the choice to 'n' and no entry needs to be selected. If no [symbol] is associated with a choice, then you can not have multiple |