^CMake Warning \(dev\) at WARN-cond-package_source.cmake:5 \(add_custom_target\):
  Policy CMP0037 is not set: Target names should not be reserved and should
  match a validity pattern.  Run "cmake --help-policy CMP0037" for policy
  details.  Use the cmake_policy command to set the policy and suppress this
  warning.

  The target name "package_source" is reserved when CPack source packaging is
  enabled.  It may result in undefined behavior.
Call Stack \(most recent call first\):
  CMakeLists.txt:3 \(include\)
This warning is for project developers.  Use -Wno-dev to suppress it.$