^CMake Warning \(dev\) at CMP0053-At-WARN.cmake:4 \(set\):
  Policy CMP0053 is not set: Simplify variable reference and escape sequence
  evaluation.  Run "cmake --help-policy CMP0053" for policy details.  Use the
  cmake_policy command to set the policy and suppress this warning.

  For input:

    '@var@'

  the old evaluation rules produce:

    '\${right}'

  but the new evaluation rules produce:

    '@var@'

  Using the old result for compatibility since the policy is not set.
Call Stack \(most recent call first\):
  CMakeLists.txt:3 \(include\)
This warning is for project developers.  Use -Wno-dev to suppress it.$