code: def cpu_arch(self):
      try:
          from cpuinfo import get_cpu_info
      except ImportError as e:
          cpu_info = self._backup_cpuinfo()
          if cpu_info is None:
              return "-march=native"
  
      try:
          cpu_info = get_cpu_info()
      except Exception as e:
          self.warning(
              f"{self.name} attempted to use `py-cpuinfo` but failed (exception type: {type(e)}, {e}), "
              "falling back to `lscpu` to get this information."
          )
          cpu_info = self._backup_cpuinfo()
          if cpu_info is None:
              return "-march=native"
  
      if cpu_info["arch"].startswith("PPC_"):
          # gcc does not provide -march on PowerPC, use -mcpu instead
          return "-mcpu=native"
      return "-march=native"
  
imports: import os
  import sys
  import time
  import importlib
  from pathlib import Path
  import subprocess
  import shlex
  import shutil
  import tempfile
  import distutils.ccompiler
  import distutils.log
  import distutils.sysconfig
  from distutils.errors import CompileError, LinkError
  from abc import ABC, abstractmethod
  from typing import List
label_desc: Use image node_id 16 for calling the OpBuilder obj's underlying member method code with example usage: obj.cpu_arch() and returns: str, str, str, str