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Diffstat (limited to 'Documentation/config.adoc')
| -rw-r--r-- | Documentation/config.adoc | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/Documentation/config.adoc b/Documentation/config.adoc index 05f1ca7293..62eebe7c54 100644 --- a/Documentation/config.adoc +++ b/Documentation/config.adoc @@ -357,7 +357,9 @@ compiled without runtime prefix support, the compiled-in prefix will be substituted instead. In the unlikely event that a literal path needs to be specified that should _not_ be expanded, it needs to be prefixed by `./`, like so: `./%(prefix)/bin`. - ++ +If prefixed with `:(optional)`, the configuration variable is treated +as if it does not exist, if the named path does not exist. Variables ~~~~~~~~~ |