message: core: OPENCV_INCLUDE_PORT_FILE for custom platform configuration
diff: //! @addtogroup core_utils
  //! @{
  +#ifdef OPENCV_INCLUDE_PORT_FILE // User-provided header file with custom platform configuration
  +#include OPENCV_INCLUDE_PORT_FILE
  +#endif
  +
  #if !defined CV_DOXYGEN && !defined CV_IGNORE_DEBUG_BUILD_GUARD
  #if (defined(_MSC_VER) && (defined(DEBUG) || defined(_DEBUG))) || \
  (defined(_GLIBCXX_DEBUG) || defined(_GLIBCXX_DEBUG_PEDANTIC))
  