/usr/include/boost/smart_ptr/ is in libboost1.49-dev 1.49.0-3.2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/boost/smart_ptr/bad_weak_ptr.hpp
/usr/include/boost/smart_ptr/detail/
/usr/include/boost/smart_ptr/detail/atomic_count.hpp
/usr/include/boost/smart_ptr/detail/atomic_count_gcc.hpp
/usr/include/boost/smart_ptr/detail/atomic_count_gcc_x86.hpp
/usr/include/boost/smart_ptr/detail/atomic_count_pthreads.hpp
/usr/include/boost/smart_ptr/detail/atomic_count_solaris.hpp
/usr/include/boost/smart_ptr/detail/atomic_count_sync.hpp
/usr/include/boost/smart_ptr/detail/atomic_count_win32.hpp
/usr/include/boost/smart_ptr/detail/lightweight_mutex.hpp
/usr/include/boost/smart_ptr/detail/lwm_nop.hpp
/usr/include/boost/smart_ptr/detail/lwm_pthreads.hpp
/usr/include/boost/smart_ptr/detail/lwm_win32_cs.hpp
/usr/include/boost/smart_ptr/detail/operator_bool.hpp
/usr/include/boost/smart_ptr/detail/quick_allocator.hpp
/usr/include/boost/smart_ptr/detail/shared_array_nmt.hpp
/usr/include/boost/smart_ptr/detail/shared_count.hpp
/usr/include/boost/smart_ptr/detail/shared_ptr_nmt.hpp
/usr/include/boost/smart_ptr/detail/sp_convertible.hpp
/usr/include/boost/smart_ptr/detail/sp_counted_base.hpp
/usr/include/boost/smart_ptr/detail/sp_counted_base_acc_ia64.hpp
/usr/include/boost/smart_ptr/detail/sp_counted_base_aix.hpp
/usr/include/boost/smart_ptr/detail/sp_counted_base_cw_ppc.hpp
/usr/include/boost/smart_ptr/detail/sp_counted_base_cw_x86.hpp
/usr/include/boost/smart_ptr/detail/sp_counted_base_gcc_ia64.hpp
/usr/include/boost/smart_ptr/detail/sp_counted_base_gcc_mips.hpp
/usr/include/boost/smart_ptr/detail/sp_counted_base_gcc_ppc.hpp
/usr/include/boost/smart_ptr/detail/sp_counted_base_gcc_sparc.hpp
/usr/include/boost/smart_ptr/detail/sp_counted_base_gcc_x86.hpp
/usr/include/boost/smart_ptr/detail/sp_counted_base_nt.hpp
/usr/include/boost/smart_ptr/detail/sp_counted_base_pt.hpp
/usr/include/boost/smart_ptr/detail/sp_counted_base_solaris.hpp
/usr/include/boost/smart_ptr/detail/sp_counted_base_spin.hpp
/usr/include/boost/smart_ptr/detail/sp_counted_base_sync.hpp
/usr/include/boost/smart_ptr/detail/sp_counted_base_w32.hpp
/usr/include/boost/smart_ptr/detail/sp_counted_impl.hpp
/usr/include/boost/smart_ptr/detail/sp_has_sync.hpp
/usr/include/boost/smart_ptr/detail/spinlock.hpp
/usr/include/boost/smart_ptr/detail/spinlock_gcc_arm.hpp
/usr/include/boost/smart_ptr/detail/spinlock_nt.hpp
/usr/include/boost/smart_ptr/detail/spinlock_pool.hpp
/usr/include/boost/smart_ptr/detail/spinlock_pt.hpp
/usr/include/boost/smart_ptr/detail/spinlock_sync.hpp
/usr/include/boost/smart_ptr/detail/spinlock_w32.hpp
/usr/include/boost/smart_ptr/detail/yield_k.hpp
/usr/include/boost/smart_ptr/enable_shared_from_this.hpp
/usr/include/boost/smart_ptr/enable_shared_from_this2.hpp
/usr/include/boost/smart_ptr/intrusive_ptr.hpp
/usr/include/boost/smart_ptr/make_shared.hpp
/usr/include/boost/smart_ptr/owner_less.hpp
/usr/include/boost/smart_ptr/scoped_array.hpp
/usr/include/boost/smart_ptr/scoped_ptr.hpp
/usr/include/boost/smart_ptr/shared_array.hpp
/usr/include/boost/smart_ptr/shared_ptr.hpp
/usr/include/boost/smart_ptr/weak_ptr.hpp