From c293e05b8e6093151dcebd6e5bd76840ac4f5e89 Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Wed, 26 Jun 2013 08:41:51 -0400
Subject: Document ENV syntax as a "variable" (#14245)

Although "ENV" is not a special variable itself, use it to document
the $ENV{VAR} syntax.
---
 Source/cmDocumentVariables.cxx | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Source/cmDocumentVariables.cxx b/Source/cmDocumentVariables.cxx
index ed51c47..7f5c8ad 100644
--- a/Source/cmDocumentVariables.cxx
+++ b/Source/cmDocumentVariables.cxx
@@ -1180,6 +1180,14 @@ void cmDocumentVariables::DefineVariables(cmake* cm)
      "The value must be an integer no less than 128.",false,
      "Variables That Describe the System");
 
+  cm->DefineProperty
+    ("ENV", cmProperty::VARIABLE,
+     "Access environment variables.",
+     "Use the syntax $ENV{VAR} to read environment variable VAR.  "
+     "See also the set() command to set ENV{VAR}."
+     ,false,
+     "Variables That Describe the System");
+
   // Variables that affect the building of object files and
   // targets.
   //
-- 
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