/** Looks for a file in a list of paths. Returns the absolute path to the
first existing location, or an empty Path if the file is not found at all. */
Path path_lookup(const std::string &, const std::list<Path> &);
/** Looks for a file in a list of paths. Returns the absolute path to the
first existing location, or an empty Path if the file is not found at all. */
Path path_lookup(const std::string &, const std::list<Path> &);