CMake Error at CMakeLists.txt:250 (find_package):
  By not providing "FindECM.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "ECM", but
  CMake did not find one.

  Could not find a package configuration file provided by "ECM" (requested
  version 5.22) with any of the following names:

    ECMConfig.cmake
    ecm-config.cmake