/usr/include/utilspp/ is in libcurlpp-dev 0.7.3-5.
This file is owned by root:root, with mode 0o755.
..
/usr/include/utilspp/EmptyType.hpp
/usr/include/utilspp/Functors.hpp
/usr/include/utilspp/NonCopyable.hpp
/usr/include/utilspp/NullType.hpp
/usr/include/utilspp/Singleton.hpp
/usr/include/utilspp/SmartPtr.hpp
/usr/include/utilspp/ThreadingFactoryMutex.hpp
/usr/include/utilspp/ThreadingFactoryMutex.inl
/usr/include/utilspp/ThreadingSingle.hpp
/usr/include/utilspp/ThreadingSingle.inl
/usr/include/utilspp/TypeList.hpp
/usr/include/utilspp/TypeTrait.hpp
/usr/include/utilspp/clone_ptr.hpp
/usr/include/utilspp/functor/
/usr/include/utilspp/functor/Binder.hpp
/usr/include/utilspp/functor/Functor.hpp
/usr/include/utilspp/functor/FunctorHandler.hpp
/usr/include/utilspp/functor/FunctorImpl.hpp
/usr/include/utilspp/functor/MemFunHandler.hpp
/usr/include/utilspp/singleton/
/usr/include/utilspp/singleton/CreationStatic.hpp
/usr/include/utilspp/singleton/CreationStatic.inl
/usr/include/utilspp/singleton/CreationUsingNew.hpp
/usr/include/utilspp/singleton/CreationUsingNew.inl
/usr/include/utilspp/singleton/LifetimeDefault.hpp
/usr/include/utilspp/singleton/LifetimeDefault.inl
/usr/include/utilspp/singleton/LifetimeLibrary.hpp
/usr/include/utilspp/singleton/LifetimeLibrary.inl
/usr/include/utilspp/singleton/LifetimeWithLongevity.hpp
/usr/include/utilspp/singleton/LifetimeWithLongevity.inl
/usr/include/utilspp/singleton/PrivateMembers.hpp
/usr/include/utilspp/singleton/PrivateMembers.inl
/usr/include/utilspp/singleton/SingletonHolder.hpp
/usr/include/utilspp/singleton/SingletonHolder.inl