# CMP0108

Added in version 3.18.

A target is not allowed to link to itself even through an `ALIAS` target.

In CMake 3.17 and below, a target can link to a target aliased to itself.

The `OLD` behavior for this policy is to allow a target to link to a target aliased to itself.

The `NEW` behavior of this policy is to prevent a target to link to itself through an `ALIAS` target.

This policy was introduced in CMake version 3.17. It may be set by `cmake_policy()` or `cmake_minimum_required()`. If it is not set, CMake does not warn, 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.