CMake Warning \(policy\) at CMP0220-WARN-block\.cmake:[0-9]+ \(enable_language\):
  Policy CMP0220 is not set: Languages enabled in subdirectories propagate to
  the top-level directory\.  Run "cmake --help-policy CMP0220" for policy
  details\.  Use the cmake_policy command to set the policy and suppress this
  warning\.

  For compatibility with older versions of CMake, the language configuration
  set by this call is not propagated to the enclosing variable scopes\.
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\.
