# CMP0081

Relative paths not allowed in `LINK_DIRECTORIES` target property.

CMake 3.12 and lower allowed the `LINK_DIRECTORIES` directory property to contain relative paths. The base path for such relative entries is not well defined. CMake 3.13 and later will issue a `FATAL_ERROR` if the `LINK_DIRECTORIES` target property (which is initialized by the `LINK_DIRECTORIES` directory property) contains a relative path.

The `OLD` behavior for this policy is not to warn about relative paths in the `LINK_DIRECTORIES` target property. The `NEW` behavior for this policy is to issue a `FATAL_ERROR` if `LINK_DIRECTORIES` contains a relative path.

This policy was introduced in CMake version 3.13. CMake version 3.15.0-rc2 warns when the policy is not set and uses `OLD` behavior. Use the `cmake_policy()` command to set it to `OLD` or `NEW` explicitly.

Note

The `OLD` behavior of a policy is `deprecated by definition` and may be removed in a future version of CMake.