CMP0085ΒΆ
New in version 3.14.
$<IN_LIST:...> handles empty list items.
In CMake 3.13 and lower, the $<IN_LIST:...> generator expression always
returned 0 if the first argument was empty, even if the list contained an
empty item. This behavior is inconsistent with the IN_LIST behavior of
if(), which this generator expression is meant to emulate. CMake 3.14
and later handles this case correctly.
The OLD behavior of this policy is for $<IN_LIST:...> to always return
0 if the first argument is empty. The NEW behavior is to return 1
if the first argument is empty and the list contains an empty item.
This policy was introduced in CMake version 3.14.
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.