| CMP0074 |
| ------- |
| |
| :command:`find_package` uses ``PackageName_ROOT`` variables. |
| |
| In CMake 3.12 and above the ``find_package(PackageName)`` command now searches |
| a prefix specified by a ``PackageName_ROOT`` CMake or environment variable. |
| Package roots are maintained as a stack so nested calls to all ``find_*`` |
| commands inside find modules 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 |
