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Diffstat (limited to 'Help/policy/CMP0085.rst')
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diff --git a/Help/policy/CMP0085.rst b/Help/policy/CMP0085.rst new file mode 100644 index 000000000..d9ec9a207 --- /dev/null +++ b/Help/policy/CMP0085.rst @@ -0,0 +1,21 @@ +CMP0085 +------- + +``$<IN_LIST:...>`` handles empty list items. + +In CMake 3.13 and lower, the ``$<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 +:command:`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. 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 |