# CMP0099

Added in version 3.17.

Link properties are transitive over private dependencies of static libraries.

In CMake 3.16 and below, evaluation of target properties `INTERFACE_LINK_OPTIONS`, `INTERFACE_LINK_DIRECTORIES`, and `INTERFACE_LINK_DEPENDS` during buildsystem generation does not follow private dependencies of static libraries, which appear in their `INTERFACE_LINK_LIBRARIES` guarded by `LINK_ONLY` generator expressions. Only the libraries themselves are propagated to link the dependent binary.

CMake 3.17 and later prefer to propagate all interface link properties. This policy provides compatibility for projects that have not been updated to expect the new behavior.

The `OLD` behavior for this policy is to not propagate interface link properties. The `NEW` behavior of this policy is to propagate interface link properties.

Added in version 3.30: Policy `CMP0166` makes `TARGET_PROPERTY` evaluation of these three transitive link properties follow private dependencies of static libraries too.

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.