/usr/include/viennacl/linalg/cuda/ is in libviennacl-dev 1.5.1-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/viennacl/linalg/cuda/common.hpp
/usr/include/viennacl/linalg/cuda/direct_solve.hpp
/usr/include/viennacl/linalg/cuda/matrix_operations.hpp
/usr/include/viennacl/linalg/cuda/matrix_operations_col.hpp
/usr/include/viennacl/linalg/cuda/matrix_operations_prod.hpp
/usr/include/viennacl/linalg/cuda/matrix_operations_row.hpp
/usr/include/viennacl/linalg/cuda/misc_operations.hpp
/usr/include/viennacl/linalg/cuda/scalar_operations.hpp
/usr/include/viennacl/linalg/cuda/sparse_matrix_operations.hpp
/usr/include/viennacl/linalg/cuda/sparse_matrix_operations_solve.hpp
/usr/include/viennacl/linalg/cuda/vector_operations.hpp