code: def check_compiler_arch(self, arch):
      return self._check_compiler_flag(
          "-march={arch}".format(arch=arch)
      )
  
imports: import shutil
  import os
  from setuptools import Extension, setup
  import contextlib
  import io
  import os.path
  import json
  import tempfile
  from setuptools.command.build_ext import build_ext, new_compiler
  from Cython.Build import cythonize
  import subprocess
  import sys
  import platform
  import numpy
label_desc: Use image node_id 4 for calling the ExtensionBuilder obj's underlying member method code with example usage: obj.check_compiler_arch(arch) and returns: self