CMake Warning \(dev\) at CMP0126-WARN.cmake:[0-9]+ \(set\):
  Policy CMP0126 is not set: set\(CACHE\) does not remove a normal variable of
  the same name\.  Run "cmake --help-policy CMP0126" for policy details\.  Use
  the cmake_policy command to set the policy and suppress this warning\.

  For compatibility with older versions of CMake, normal variable "MY_VAR"
  will be removed from the current scope\.
Call Stack \(most recent call first\):
  CMakeLists.txt:[0-9]+ \(include\)
This warning is for project developers\.  Use -Wno-dev to suppress it\.