/usr/include/viennacl/device_specific/ is in libviennacl-dev 1.7.1+dfsg1-2ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/viennacl/device_specific/builtin_database/
/usr/include/viennacl/device_specific/builtin_database/common.hpp
/usr/include/viennacl/device_specific/builtin_database/devices/
/usr/include/viennacl/device_specific/builtin_database/devices/accelerator/
/usr/include/viennacl/device_specific/builtin_database/devices/accelerator/fallback.hpp
/usr/include/viennacl/device_specific/builtin_database/devices/cpu/
/usr/include/viennacl/device_specific/builtin_database/devices/cpu/amd/
/usr/include/viennacl/device_specific/builtin_database/devices/cpu/fallback.hpp
/usr/include/viennacl/device_specific/builtin_database/devices/gpu/
/usr/include/viennacl/device_specific/builtin_database/devices/gpu/amd/
/usr/include/viennacl/device_specific/builtin_database/devices/gpu/amd/evergreen/
/usr/include/viennacl/device_specific/builtin_database/devices/gpu/amd/evergreen/cedar.hpp
/usr/include/viennacl/device_specific/builtin_database/devices/gpu/amd/evergreen/cypress.hpp
/usr/include/viennacl/device_specific/builtin_database/devices/gpu/amd/northern_islands/
/usr/include/viennacl/device_specific/builtin_database/devices/gpu/amd/northern_islands/barts.hpp
/usr/include/viennacl/device_specific/builtin_database/devices/gpu/amd/northern_islands/devastator.hpp
/usr/include/viennacl/device_specific/builtin_database/devices/gpu/amd/northern_islands/scrapper.hpp
/usr/include/viennacl/device_specific/builtin_database/devices/gpu/amd/southern_islands/
/usr/include/viennacl/device_specific/builtin_database/devices/gpu/amd/southern_islands/tahiti.hpp
/usr/include/viennacl/device_specific/builtin_database/devices/gpu/amd/unknown/
/usr/include/viennacl/device_specific/builtin_database/devices/gpu/amd/volcanic_islands/
/usr/include/viennacl/device_specific/builtin_database/devices/gpu/amd/volcanic_islands/hawaii.hpp
/usr/include/viennacl/device_specific/builtin_database/devices/gpu/fallback.hpp
/usr/include/viennacl/device_specific/builtin_database/devices/gpu/nvidia/
/usr/include/viennacl/device_specific/builtin_database/devices/gpu/nvidia/fermi/
/usr/include/viennacl/device_specific/builtin_database/devices/gpu/nvidia/fermi/geforce_gt_540m.hpp
/usr/include/viennacl/device_specific/builtin_database/devices/gpu/nvidia/fermi/geforce_gtx_470.hpp
/usr/include/viennacl/device_specific/builtin_database/devices/gpu/nvidia/fermi/geforce_gtx_580.hpp
/usr/include/viennacl/device_specific/builtin_database/devices/gpu/nvidia/fermi/tesla_c2050.hpp
/usr/include/viennacl/device_specific/builtin_database/devices/gpu/nvidia/kepler/
/usr/include/viennacl/device_specific/builtin_database/devices/gpu/nvidia/kepler/tesla_k20m.hpp
/usr/include/viennacl/device_specific/builtin_database/devices/gpu/nvidia/maxwell/
/usr/include/viennacl/device_specific/builtin_database/devices/gpu/nvidia/maxwell/geforce_gtx_750_ti.hpp
/usr/include/viennacl/device_specific/builtin_database/devices/gpu/nvidia/tesla/
/usr/include/viennacl/device_specific/builtin_database/devices/gpu/nvidia/tesla/geforce_gtx_260.hpp
/usr/include/viennacl/device_specific/builtin_database/matrix_product.hpp
/usr/include/viennacl/device_specific/execute.hpp
/usr/include/viennacl/device_specific/execution_handler.hpp
/usr/include/viennacl/device_specific/forwards.h
/usr/include/viennacl/device_specific/lazy_program_compiler.hpp
/usr/include/viennacl/device_specific/mapped_objects.hpp
/usr/include/viennacl/device_specific/templates/
/usr/include/viennacl/device_specific/templates/matrix_product_template.hpp
/usr/include/viennacl/device_specific/templates/template_base.hpp
/usr/include/viennacl/device_specific/templates/utils.hpp
/usr/include/viennacl/device_specific/tree_parsing.hpp
/usr/include/viennacl/device_specific/utils.hpp