/usr/include/simgear/misc/ is in libsimgear-dev 3.4.0-3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/simgear/misc/CSSBorder.hxx
/usr/include/simgear/misc/ListDiff.hxx
/usr/include/simgear/misc/ResourceManager.hxx
/usr/include/simgear/misc/SVGpreserveAspectRatio.hxx
/usr/include/simgear/misc/SimpleMarkdown.hxx
/usr/include/simgear/misc/gzcontainerfile.hxx
/usr/include/simgear/misc/interpolator.hxx
/usr/include/simgear/misc/make_new.hxx
/usr/include/simgear/misc/sg_dir.hxx
/usr/include/simgear/misc/sg_path.hxx
/usr/include/simgear/misc/sgstream.hxx
/usr/include/simgear/misc/stdint.hxx
/usr/include/simgear/misc/stopwatch.hxx
/usr/include/simgear/misc/strutils.hxx
/usr/include/simgear/misc/tabbed_values.hxx
/usr/include/simgear/misc/texcoord.hxx
/usr/include/simgear/misc/zfstream.hxx