code: def library_dir_option(self, dir):
      return "-L" + dir
  
imports: import os
  import sys
  import re
  import shlex
  import itertools
  from .None import sysconfig
  from ._modified import newer
  from .ccompiler import CCompiler, gen_preprocess_options, gen_lib_options
  from .errors import DistutilsExecError, CompileError, LibError, LinkError
  from ._log import log
  from ._macos_compat import compiler_fixup
label_desc: Use image node_id 5 for calling the UnixCCompiler obj's underlying member method code with example usage: obj.library_dir_option(dir) and returns: unknown