CMake Warning \(policy\):
  Policy CMP0068 is not set: RPATH settings on macOS do not affect
  install_name\.  Run "cmake --help-policy CMP0068" for policy details\.  Use
  the cmake_policy command to set the policy and suppress this warning\.

  For compatibility with older versions of CMake, the install_name fields for
  the following targets are still affected by RPATH settings:

   foo3
   foo4

This warning is for project developers\.  Use -Wno-author or -Wno-policy to
suppress it\.
