CMake Warning at source_subfolder/cmake/OpenCVUtils.cmake:721 (message):
  Unexpected option: WITH_PTHREADS_PF (=True)

  Condition: IF (NOT;WIN32;OR;MINGW)
Call Stack (most recent call first):
  source_subfolder/CMakeLists.txt:349 (OCV_OPTION)


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

    CMAKE_EXPORT_NO_PACKAGE_REGISTRY