CMP0144ΒΆ
Added in version 3.27.
find_package() uses upper-case <PACKAGENAME>_ROOT variables.
In CMake 3.27 and above the find_package(<PackageName>) command now
searches prefixes specified by the upper-case <PACKAGENAME>_ROOT
CMake variable and the <PACKAGENAME>_ROOT environment variable
in addition to the case-preserved <PackageName>_ROOT and
<PackageName>_ROOT variables used since 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.
This policy was introduced in CMake version 3.27.
It may be set by cmake_policy() or cmake_minimum_required().
If it is not set, CMake warns, and uses OLD behavior.
Note
The OLD behavior of a policy is
deprecated by definition
and may be removed in a future version of CMake.