/usr/include/msgpack/preprocessor/iteration/ is in libmsgpack-dev 1.4.2-4.
This file is owned by root:root, with mode 0o755.
..
/usr/include/msgpack/preprocessor/iteration/detail/
/usr/include/msgpack/preprocessor/iteration/detail/bounds/
/usr/include/msgpack/preprocessor/iteration/detail/bounds/lower1.hpp
/usr/include/msgpack/preprocessor/iteration/detail/bounds/lower2.hpp
/usr/include/msgpack/preprocessor/iteration/detail/bounds/lower3.hpp
/usr/include/msgpack/preprocessor/iteration/detail/bounds/lower4.hpp
/usr/include/msgpack/preprocessor/iteration/detail/bounds/lower5.hpp
/usr/include/msgpack/preprocessor/iteration/detail/bounds/upper1.hpp
/usr/include/msgpack/preprocessor/iteration/detail/bounds/upper2.hpp
/usr/include/msgpack/preprocessor/iteration/detail/bounds/upper3.hpp
/usr/include/msgpack/preprocessor/iteration/detail/bounds/upper4.hpp
/usr/include/msgpack/preprocessor/iteration/detail/bounds/upper5.hpp
/usr/include/msgpack/preprocessor/iteration/detail/finish.hpp
/usr/include/msgpack/preprocessor/iteration/detail/iter/
/usr/include/msgpack/preprocessor/iteration/detail/iter/forward1.hpp
/usr/include/msgpack/preprocessor/iteration/detail/iter/forward2.hpp
/usr/include/msgpack/preprocessor/iteration/detail/iter/forward3.hpp
/usr/include/msgpack/preprocessor/iteration/detail/iter/forward4.hpp
/usr/include/msgpack/preprocessor/iteration/detail/iter/forward5.hpp
/usr/include/msgpack/preprocessor/iteration/detail/iter/reverse1.hpp
/usr/include/msgpack/preprocessor/iteration/detail/iter/reverse2.hpp
/usr/include/msgpack/preprocessor/iteration/detail/iter/reverse3.hpp
/usr/include/msgpack/preprocessor/iteration/detail/iter/reverse4.hpp
/usr/include/msgpack/preprocessor/iteration/detail/iter/reverse5.hpp
/usr/include/msgpack/preprocessor/iteration/detail/local.hpp
/usr/include/msgpack/preprocessor/iteration/detail/rlocal.hpp
/usr/include/msgpack/preprocessor/iteration/detail/self.hpp
/usr/include/msgpack/preprocessor/iteration/detail/start.hpp
/usr/include/msgpack/preprocessor/iteration/iterate.hpp
/usr/include/msgpack/preprocessor/iteration/local.hpp
/usr/include/msgpack/preprocessor/iteration/self.hpp