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-rw-r--r--Help/command/if.rst5
1 files changed, 3 insertions, 2 deletions
diff --git a/Help/command/if.rst b/Help/command/if.rst
index 4f955db..64f1c35 100644
--- a/Help/command/if.rst
+++ b/Help/command/if.rst
@@ -71,8 +71,9 @@ Basic Expressions
True if given a variable that is defined to a value that is not a false
constant. False otherwise, including if the variable is undefined.
Note that macro arguments are not variables.
- Environment variables also cannot be tested this way, e.g.
- ``if(ENV{some_var})`` will always evaluate to false.
+ :ref:`Environment Variables <CMake Language Environment Variables>` also
+ cannot be tested this way, e.g. ``if(ENV{some_var})`` will always evaluate
+ to false.
``if(<string>)``
A quoted string always evaluates to false unless: