/usr/include/ITK-4.5/sunpro/ is in libinsighttoolkit4-dev 4.5.0-3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/ITK-4.5/sunpro/vcl_algorithm.txx
/usr/include/ITK-4.5/sunpro/vcl_cmath.h
/usr/include/ITK-4.5/sunpro/vcl_complex.h
/usr/include/ITK-4.5/sunpro/vcl_complex.txx
/usr/include/ITK-4.5/sunpro/vcl_cstdlib.h
/usr/include/ITK-4.5/sunpro/vcl_deque.txx
/usr/include/ITK-4.5/sunpro/vcl_functional.txx
/usr/include/ITK-4.5/sunpro/vcl_iterator.h
/usr/include/ITK-4.5/sunpro/vcl_iterator.txx
/usr/include/ITK-4.5/sunpro/vcl_list.txx
/usr/include/ITK-4.5/sunpro/vcl_map.h
/usr/include/ITK-4.5/sunpro/vcl_map.txx
/usr/include/ITK-4.5/sunpro/vcl_set.txx
/usr/include/ITK-4.5/sunpro/vcl_stack.txx
/usr/include/ITK-4.5/sunpro/vcl_utility.txx
/usr/include/ITK-4.5/sunpro/vcl_vector.h
/usr/include/ITK-4.5/sunpro/vcl_vector.txx