/usr/include/feel/feelmesh/ is in libfeel++-dev 0.91.0~svn7215-3build1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/feel/feelmesh/bareitems.cpp
/usr/include/feel/feelmesh/bareitems.hpp
/usr/include/feel/feelmesh/convex.hpp
/usr/include/feel/feelmesh/edges.hpp
/usr/include/feel/feelmesh/elements.hpp
/usr/include/feel/feelmesh/entities.cpp
/usr/include/feel/feelmesh/entities.hpp
/usr/include/feel/feelmesh/enums.hpp
/usr/include/feel/feelmesh/faces.hpp
/usr/include/feel/feelmesh/filters.hpp
/usr/include/feel/feelmesh/functors.cpp
/usr/include/feel/feelmesh/functors.hpp
/usr/include/feel/feelmesh/geo0d.cpp
/usr/include/feel/feelmesh/geo0d.hpp
/usr/include/feel/feelmesh/geoelement.hpp
/usr/include/feel/feelmesh/geoentity.hpp
/usr/include/feel/feelmesh/geond.hpp
/usr/include/feel/feelmesh/hypercube.cpp
/usr/include/feel/feelmesh/hypercube.hpp
/usr/include/feel/feelmesh/hypercubeordering.hpp
/usr/include/feel/feelmesh/kdtree.cpp
/usr/include/feel/feelmesh/kdtree.hpp
/usr/include/feel/feelmesh/lineordering.hpp
/usr/include/feel/feelmesh/marker.cpp
/usr/include/feel/feelmesh/marker.hpp
/usr/include/feel/feelmesh/mesh1d.hpp
/usr/include/feel/feelmesh/mesh2d.hpp
/usr/include/feel/feelmesh/mesh3d.hpp
/usr/include/feel/feelmesh/meshbase.cpp
/usr/include/feel/feelmesh/meshbase.hpp
/usr/include/feel/feelmesh/meshmover.cpp
/usr/include/feel/feelmesh/meshmover.hpp
/usr/include/feel/feelmesh/meshutil.hpp
/usr/include/feel/feelmesh/points.hpp
/usr/include/feel/feelmesh/pointset.hpp
/usr/include/feel/feelmesh/refentity.hpp
/usr/include/feel/feelmesh/refhypercube.hpp
/usr/include/feel/feelmesh/refsimplex.hpp
/usr/include/feel/feelmesh/regiontree.cpp
/usr/include/feel/feelmesh/regiontree.hpp
/usr/include/feel/feelmesh/simplex.cpp
/usr/include/feel/feelmesh/simplex.hpp
/usr/include/feel/feelmesh/simplexordering.hpp
/usr/include/feel/feelmesh/sphere.hpp
/usr/include/feel/feelmesh/structuredgrid.hpp
/usr/include/feel/feelmesh/surface.hpp
/usr/include/feel/feelmesh/traits.hpp