MACOSX_RPATH is enabled by default.
CMake 2.8.12 and newer has support for using
@rpath in a target’s install
name. This was enabled by setting the target property
@rpath in an install name is a more
flexible and powerful mechanism than
for locating shared libraries.
This policy was introduced in CMake version 3.0. CMake version 3.6.2 warns when the policy is not set and uses OLD behavior. Use the cmake_policy command to set it to OLD or NEW explicitly.
OLD behavior of a policy is
deprecated by definition
and may be removed in a future version of CMake.