/usr/ is in libsmartcardpp-dev 0.3.0-0ubuntu6.
This file is owned by root:root, with mode 0o755.
..
/usr/include/smartcardpp/
/usr/include/smartcardpp/esteid/
/usr/lib/libsmartcardpp.so
/usr/share/
/usr/share/doc/
/usr/share/doc/libsmartcardpp-dev/
/usr/share/doc/libsmartcardpp-dev/copyright
/usr/include/
/usr/include/smartcardpp/esteid/EstEidCard.h
/usr/include/smartcardpp/types.h
/usr/include/smartcardpp/CardBase.h
/usr/include/smartcardpp/PinString.h
/usr/include/smartcardpp/locked_allocator.h
/usr/include/smartcardpp/smartcardpp.h
/usr/include/smartcardpp/PCSCManager.h
/usr/include/smartcardpp/SCError.h
/usr/include/smartcardpp/DynamicLibrary.h
/usr/include/smartcardpp/ManagerInterface.h
/usr/bin/
/usr/bin/card-test
/usr/lib/
/usr/lib/pkgconfig/
/usr/lib/pkgconfig/smartcardpp.pc
/usr/share/doc/libsmartcardpp-dev/AUTHORS
/usr/share/doc/libsmartcardpp-dev/NEWS.gz
/usr/share/doc/libsmartcardpp-dev/README
/usr/share/doc/libsmartcardpp-dev/changelog.Debian.gz