https://github.com/Kitware/CMake
Tip revision: 498b7da2e471fd8ef5a41433505358df4f117044 authored by Brad King on 24 February 2021, 16:21:15 UTC
CMake 3.20.0-rc2
CMake 3.20.0-rc2
Tip revision: 498b7da
CMP0074.rst
CMP0074
-------
.. versionadded:: 3.12
:command:`find_package` uses ``<PackageName>_ROOT`` variables.
In CMake 3.12 and above the :command:`find_package(<PackageName>)` command now
searches prefixes specified by the :variable:`<PackageName>_ROOT` CMake
variable and the :envvar:`<PackageName>_ROOT` environment variable.
Package roots are maintained as a stack so nested calls to all ``find_*``
commands inside find modules and config packages also search the roots as
prefixes. 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. The ``NEW`` behavior for this policy is to use
``<PackageName>_ROOT`` variables.
This policy was introduced in CMake version 3.12. CMake version
|release| warns when the policy is not set and uses ``OLD`` behavior.
Use the :command:`cmake_policy` command to set it to ``OLD`` or ``NEW``
explicitly.
.. include:: DEPRECATED.txt