CMP0211

Added in version 4.4.

A file may belong to at most one file set in a target.

In CMake 4.3 and below, it was possible to specify the same file in multiple file sets in a target. In CMake 4.4 and above, a file may belong to at most one file set in a target. This policy provides compatibility for projects that have not been updated accordingly.

The OLD behavior for this policy is to accept the same file in multiple file sets in a target. The NEW behavior for this policy is to accept a given file in at most one file set in a target.

This policy was introduced in CMake version 4.4. It may be set by cmake_policy() or cmake_minimum_required(). If it is not set, CMake warns when a file is part of multiple file sets in a target, 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.