/usr/include/pcl-1.7/pcl/common/impl/ is in libpcl-dev 1.7.2-14build1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/pcl-1.7/pcl/common/impl/accumulators.hpp
/usr/include/pcl-1.7/pcl/common/impl/angles.hpp
/usr/include/pcl-1.7/pcl/common/impl/bivariate_polynomial.hpp
/usr/include/pcl-1.7/pcl/common/impl/centroid.hpp
/usr/include/pcl-1.7/pcl/common/impl/common.hpp
/usr/include/pcl-1.7/pcl/common/impl/copy_point.hpp
/usr/include/pcl-1.7/pcl/common/impl/eigen.hpp
/usr/include/pcl-1.7/pcl/common/impl/file_io.hpp
/usr/include/pcl-1.7/pcl/common/impl/gaussian.hpp
/usr/include/pcl-1.7/pcl/common/impl/generate.hpp
/usr/include/pcl-1.7/pcl/common/impl/intensity.hpp
/usr/include/pcl-1.7/pcl/common/impl/intersections.hpp
/usr/include/pcl-1.7/pcl/common/impl/io.hpp
/usr/include/pcl-1.7/pcl/common/impl/norms.hpp
/usr/include/pcl-1.7/pcl/common/impl/pca.hpp
/usr/include/pcl-1.7/pcl/common/impl/piecewise_linear_function.hpp
/usr/include/pcl-1.7/pcl/common/impl/polynomial_calculations.hpp
/usr/include/pcl-1.7/pcl/common/impl/projection_matrix.hpp
/usr/include/pcl-1.7/pcl/common/impl/random.hpp
/usr/include/pcl-1.7/pcl/common/impl/spring.hpp
/usr/include/pcl-1.7/pcl/common/impl/transformation_from_correspondences.hpp
/usr/include/pcl-1.7/pcl/common/impl/transforms.hpp
/usr/include/pcl-1.7/pcl/common/impl/vector_average.hpp