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Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/kbuild/kconfig-language.txt | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/kbuild/kconfig-language.txt b/Documentation/kbuild/kconfig-language.txt index 536d5bfbdb8d..fe8b0c4892cf 100644 --- a/Documentation/kbuild/kconfig-language.txt +++ b/Documentation/kbuild/kconfig-language.txt | |||
| @@ -98,6 +98,15 @@ applicable everywhere (see syntax). | |||
| 98 | times, the limit is set to the largest selection. | 98 | times, the limit is set to the largest selection. |
| 99 | Reverse dependencies can only be used with boolean or tristate | 99 | Reverse dependencies can only be used with boolean or tristate |
| 100 | symbols. | 100 | symbols. |
| 101 | Note: | ||
| 102 | select is evil.... select will by brute force set a symbol | ||
| 103 | equal to 'y' without visiting the dependencies. So abusing | ||
| 104 | select you are able to select a symbol FOO even if FOO depends | ||
| 105 | on BAR that is not set. In general use select only for | ||
| 106 | non-visible symbols (no promts anywhere) and for symbols with | ||
| 107 | no dependencies. That will limit the usefulness but on the | ||
| 108 | other hand avoid the illegal configurations all over. kconfig | ||
| 109 | should one day warn about such things. | ||
| 101 | 110 | ||
| 102 | - numerical ranges: "range" <symbol> <symbol> ["if" <expr>] | 111 | - numerical ranges: "range" <symbol> <symbol> ["if" <expr>] |
| 103 | This allows to limit the range of possible input values for int | 112 | This allows to limit the range of possible input values for int |