string ly_dir = string (getenv ("top-src-dir")) + "/ly";
parse_path (string (1, PATHSEP) + ly_dir);
string file_name = find (file, extensions);
string ly_dir = string (getenv ("top-src-dir")) + "/ly";
parse_path (string (1, PATHSEP) + ly_dir);
string file_name = find (file, extensions);