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Diffstat (limited to 'Help/manual/cmake-language.7.rst')
| -rw-r--r-- | Help/manual/cmake-language.7.rst | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/Help/manual/cmake-language.7.rst b/Help/manual/cmake-language.7.rst index 1b5281a..5e5cfff 100644 --- a/Help/manual/cmake-language.7.rst +++ b/Help/manual/cmake-language.7.rst @@ -389,7 +389,7 @@ historical considerations.) Variable References ------------------- -A *variable reference* has the form ``${variable_name}`` and is +A *variable reference* has the form ``${<variable>}`` and is evaluated inside a `Quoted Argument`_ or an `Unquoted Argument`_. A variable reference is replaced by the value of the variable, or by the empty string if the variable is not set. @@ -405,12 +405,18 @@ the ``$`` is also technically permitted but is discouraged. The `Variables`_ section documents the scope of variable names and how their values are set. -An *environment variable reference* has the form ``$ENV{VAR}``. +An *environment variable reference* has the form ``$ENV{<variable>}``. See the `Environment Variables`_ section for more information. -A *cache variable reference* has the form ``$CACHE{VAR}``. +A *cache variable reference* has the form ``$CACHE{<variable>}``. See :variable:`CACHE` for more information. +The :command:`if` command has a special condition syntax that +allows for variable references in the short form ``<variable>`` +instead of ``${<variable>}``. +However, environment and cache variables always need to be +referenced as ``$ENV{<variable>}`` or ``$CACHE{<variable>}``. + Comments -------- |