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Diffstat (limited to 'Documentation/kbuild/kconfig-language.txt')
| -rw-r--r-- | Documentation/kbuild/kconfig-language.txt | 28 |
1 files changed, 5 insertions, 23 deletions
diff --git a/Documentation/kbuild/kconfig-language.txt b/Documentation/kbuild/kconfig-language.txt index a686f9cd69c..350f733bf2c 100644 --- a/Documentation/kbuild/kconfig-language.txt +++ b/Documentation/kbuild/kconfig-language.txt @@ -147,6 +147,7 @@ applicable everywhere (see syntax). - "modules" This declares the symbol to be used as the MODULES symbol, which enables the third modular state for all config symbols. + At most one symbol may have the "modules" option set. - "env"=<value> This imports the environment variable into Kconfig. It behaves like @@ -156,6 +157,10 @@ applicable everywhere (see syntax). to the build environment (if this is desired, it can be done via another symbol). + - "allnoconfig_y" + This declares the symbol as one that should have the value y when + using "allnoconfig". Used for symbols that hide other symbols. + Menu dependencies ----------------- @@ -388,26 +393,3 @@ config FOO depends on BAR && m limits FOO to module (=m) or disabled (=n). - -Kconfig symbol existence -~~~~~~~~~~~~~~~~~~~~~~~~ -The following two methods produce the same kconfig symbol dependencies -but differ greatly in kconfig symbol existence (production) in the -generated config file. - -case 1: - -config FOO - tristate "about foo" - depends on BAR - -vs. case 2: - -if BAR -config FOO - tristate "about foo" -endif - -In case 1, the symbol FOO will always exist in the config file (given -no other dependencies). In case 2, the symbol FOO will only exist in -the config file if BAR is enabled. |