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-rw-r--r--Help/envvar/PackageName_ROOT.rst14
1 files changed, 14 insertions, 0 deletions
diff --git a/Help/envvar/PackageName_ROOT.rst b/Help/envvar/PackageName_ROOT.rst
index fa8c385..6e9c744 100644
--- a/Help/envvar/PackageName_ROOT.rst
+++ b/Help/envvar/PackageName_ROOT.rst
@@ -17,3 +17,17 @@ by ``:`` on UNIX or ``;`` on Windows (the same as the ``PATH`` environment
variable convention on those platforms).
See also the :variable:`<PackageName>_ROOT` CMake variable.
+
+.. envvar:: <PACKAGENAME>_ROOT
+
+ .. versionadded:: 3.27
+
+ Calls to :command:`find_package(<PackageName>)` will also search in
+ prefixes specified by the upper-case ``<PACKAGENAME>_ROOT`` environment
+ variable. See policy :policy:`CMP0144`.
+
+.. note::
+
+ Note that the ``<PackageName>_ROOT`` and ``<PACKAGENAME>_ROOT``
+ environment variables are distinct only on platforms that have
+ case-sensitive environments.