CMake Deprecation Warning at CMakeLists.txt:1 (cmake_minimum_required):
  Compatibility with CMake < 3.10 will be removed from a future version of
  CMake.

  Update the VERSION argument  value.  Or, use the ... syntax
  to tell CMake that the project requires at least  but has been updated
  to work with policies introduced by  or earlier.


CMake Warning:
  Manually-specified variables were not used by the project:

    CMAKE_C_FLAGS
    CMAKE_LD_FLAGS