/usr/include/boost/atomic/ is in libboost1.62-dev 1.62.0+dfsg-5.
This file is owned by root:root, with mode 0o755.
..
/usr/include/boost/atomic/atomic.hpp
/usr/include/boost/atomic/atomic_flag.hpp
/usr/include/boost/atomic/capabilities.hpp
/usr/include/boost/atomic/detail/
/usr/include/boost/atomic/detail/atomic_flag.hpp
/usr/include/boost/atomic/detail/atomic_template.hpp
/usr/include/boost/atomic/detail/bitwise_cast.hpp
/usr/include/boost/atomic/detail/caps_gcc_alpha.hpp
/usr/include/boost/atomic/detail/caps_gcc_arm.hpp
/usr/include/boost/atomic/detail/caps_gcc_atomic.hpp
/usr/include/boost/atomic/detail/caps_gcc_ppc.hpp
/usr/include/boost/atomic/detail/caps_gcc_sparc.hpp
/usr/include/boost/atomic/detail/caps_gcc_sync.hpp
/usr/include/boost/atomic/detail/caps_gcc_x86.hpp
/usr/include/boost/atomic/detail/caps_linux_arm.hpp
/usr/include/boost/atomic/detail/caps_msvc_arm.hpp
/usr/include/boost/atomic/detail/caps_msvc_x86.hpp
/usr/include/boost/atomic/detail/caps_windows.hpp
/usr/include/boost/atomic/detail/config.hpp
/usr/include/boost/atomic/detail/int_sizes.hpp
/usr/include/boost/atomic/detail/interlocked.hpp
/usr/include/boost/atomic/detail/link.hpp
/usr/include/boost/atomic/detail/lockpool.hpp
/usr/include/boost/atomic/detail/operations.hpp
/usr/include/boost/atomic/detail/operations_fwd.hpp
/usr/include/boost/atomic/detail/operations_lockfree.hpp
/usr/include/boost/atomic/detail/ops_cas_based.hpp
/usr/include/boost/atomic/detail/ops_emulated.hpp
/usr/include/boost/atomic/detail/ops_extending_cas_based.hpp
/usr/include/boost/atomic/detail/ops_gcc_alpha.hpp
/usr/include/boost/atomic/detail/ops_gcc_arm.hpp
/usr/include/boost/atomic/detail/ops_gcc_atomic.hpp
/usr/include/boost/atomic/detail/ops_gcc_ppc.hpp
/usr/include/boost/atomic/detail/ops_gcc_sparc.hpp
/usr/include/boost/atomic/detail/ops_gcc_sync.hpp
/usr/include/boost/atomic/detail/ops_gcc_x86.hpp
/usr/include/boost/atomic/detail/ops_gcc_x86_dcas.hpp
/usr/include/boost/atomic/detail/ops_linux_arm.hpp
/usr/include/boost/atomic/detail/ops_msvc_arm.hpp
/usr/include/boost/atomic/detail/ops_msvc_common.hpp
/usr/include/boost/atomic/detail/ops_msvc_x86.hpp
/usr/include/boost/atomic/detail/ops_windows.hpp
/usr/include/boost/atomic/detail/pause.hpp
/usr/include/boost/atomic/detail/platform.hpp
/usr/include/boost/atomic/detail/storage_type.hpp
/usr/include/boost/atomic/fences.hpp