^CMake Warning \(policy\) at CMP0069-WARN\.cmake:[0-9]+ \(add_executable\):
  Policy CMP0069 is not set: INTERPROCEDURAL_OPTIMIZATION is enforced when
  enabled\.  Run "cmake --help-policy CMP0069" for policy details\.  Use the
  cmake_policy command to set the policy and suppress this warning\.

  INTERPROCEDURAL_OPTIMIZATION property will be ignored for target 'foo'\.
Call Stack \(most recent call first\):
  CMakeLists\.txt:[0-9]+ \(include\)
This warning is for project developers\.  Use -Wno-author or -Wno-policy to
suppress it\.$
