# CMP0046

Error on non-existent dependency in add_dependencies.

CMake 2.8.12 and lower silently ignored non-existent dependencies listed in the `add_dependencies()` command.

The `OLD` behavior for this policy is to silently ignore non-existent dependencies. The `NEW` behavior for this policy is to report an error if non-existent dependencies are listed in the `add_dependencies()` command.

This policy was introduced in CMake version 3.0. CMake version 3.18.0-rc4 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.