- cmakeut_add_external_git_project
  wrappers for ExternalProject_Add(), allow compilation without
  Internet connection.

- cmakeut_copy_dir_if_exists
- cmakeut_copy_file_if_exists
  add custom targets to copy directories or files if they exists.

- cmakeut_dump_variables
  dump all cmake variables (for debugging)

- cmakeut_list_filenames
  list filenames in the given directory

- cmakeut_detect_func_macro
  detect __func__ and __FUNCTION__

- cmakeut_add_cpp_test
  cmake test wrapper

- third party
    - FindEigen3.cmake
      find Eigen headers, copied from Eigen distribution