/usr/include/pangomm-1.4/pangomm/ is in libpangomm-1.4-dev 2.40.1-4.
This file is owned by root:root, with mode 0o755.
..
/usr/include/pangomm-1.4/pangomm/attributes.h
/usr/include/pangomm-1.4/pangomm/attriter.h
/usr/include/pangomm-1.4/pangomm/attrlist.h
/usr/include/pangomm-1.4/pangomm/cairofontmap.h
/usr/include/pangomm-1.4/pangomm/color.h
/usr/include/pangomm-1.4/pangomm/context.h
/usr/include/pangomm-1.4/pangomm/coverage.h
/usr/include/pangomm-1.4/pangomm/font.h
/usr/include/pangomm-1.4/pangomm/fontdescription.h
/usr/include/pangomm-1.4/pangomm/fontface.h
/usr/include/pangomm-1.4/pangomm/fontfamily.h
/usr/include/pangomm-1.4/pangomm/fontmap.h
/usr/include/pangomm-1.4/pangomm/fontmetrics.h
/usr/include/pangomm-1.4/pangomm/fontset.h
/usr/include/pangomm-1.4/pangomm/glyph.h
/usr/include/pangomm-1.4/pangomm/glyphstring.h
/usr/include/pangomm-1.4/pangomm/init.h
/usr/include/pangomm-1.4/pangomm/item.h
/usr/include/pangomm-1.4/pangomm/language.h
/usr/include/pangomm-1.4/pangomm/layout.h
/usr/include/pangomm-1.4/pangomm/layoutiter.h
/usr/include/pangomm-1.4/pangomm/layoutline.h
/usr/include/pangomm-1.4/pangomm/layoutrun.h
/usr/include/pangomm-1.4/pangomm/private/
/usr/include/pangomm-1.4/pangomm/private/attributes_p.h
/usr/include/pangomm-1.4/pangomm/private/attriter_p.h
/usr/include/pangomm-1.4/pangomm/private/attrlist_p.h
/usr/include/pangomm-1.4/pangomm/private/cairofontmap_p.h
/usr/include/pangomm-1.4/pangomm/private/color_p.h
/usr/include/pangomm-1.4/pangomm/private/context_p.h
/usr/include/pangomm-1.4/pangomm/private/coverage_p.h
/usr/include/pangomm-1.4/pangomm/private/font_p.h
/usr/include/pangomm-1.4/pangomm/private/fontdescription_p.h
/usr/include/pangomm-1.4/pangomm/private/fontface_p.h
/usr/include/pangomm-1.4/pangomm/private/fontfamily_p.h
/usr/include/pangomm-1.4/pangomm/private/fontmap_p.h
/usr/include/pangomm-1.4/pangomm/private/fontmetrics_p.h
/usr/include/pangomm-1.4/pangomm/private/fontset_p.h
/usr/include/pangomm-1.4/pangomm/private/glyph_p.h
/usr/include/pangomm-1.4/pangomm/private/glyphstring_p.h
/usr/include/pangomm-1.4/pangomm/private/item_p.h
/usr/include/pangomm-1.4/pangomm/private/language_p.h
/usr/include/pangomm-1.4/pangomm/private/layout_p.h
/usr/include/pangomm-1.4/pangomm/private/layoutiter_p.h
/usr/include/pangomm-1.4/pangomm/private/layoutline_p.h
/usr/include/pangomm-1.4/pangomm/private/layoutrun_p.h
/usr/include/pangomm-1.4/pangomm/private/rectangle_p.h
/usr/include/pangomm-1.4/pangomm/private/renderer_p.h
/usr/include/pangomm-1.4/pangomm/private/tabarray_p.h
/usr/include/pangomm-1.4/pangomm/rectangle.h
/usr/include/pangomm-1.4/pangomm/renderer.h
/usr/include/pangomm-1.4/pangomm/tabarray.h
/usr/include/pangomm-1.4/pangomm/types.h
/usr/include/pangomm-1.4/pangomm/wrap_init.h