CMake/Help/policy/CMP0144.rst

CMP0144
-------

.. versionadded:: 3.27

:command:`find_package` uses upper-case ``<PACKAGENAME>_ROOT`` variables.

In CMake 3.27 and above the :command:`find_package(<PackageName>)` command now
searches prefixes specified by the upper-case :variable:`<PACKAGENAME>_ROOT`
CMake variable and the :envvar:`<PACKAGENAME>_ROOT` environment variable
in addition to the case-preserved :variable:`<PackageName>_ROOT` and
:envvar:`<PackageName>_ROOT` variables used since policy :policy:`CMP0074`.
This policy provides compatibility with projects that have not been
updated to avoid using ``<PACKAGENAME>_ROOT`` variables for other purposes.

The ``OLD`` behavior for this policy is to ignore ``<PACKAGENAME>_ROOT``
variables if the original ``<PackageName>`` has lower-case characters.
The ``NEW`` behavior for this policy is to use ``<PACKAGENAME>_ROOT``
variables.

.. |INTRODUCED_IN_CMAKE_VERSION| replace:: 3.27
.. |WARNS_OR_DOES_NOT_WARN| replace:: warns
.. include:: include/STANDARD_ADVICE.rst

.. include:: include/DEPRECATED.rst