def get_gcc_compiler(environ_cp):
  gcc_env = environ_cp.get('CXX') or environ_cp.get('CC') or shutil.which('gcc')
  if gcc_env is not None:
    gcc_version = run_shell([gcc_env, '--version']).split()
    if gcc_version[0] in ('gcc', 'g++'):
      return gcc_env
  return None


def main():
  global _TF_WORKSPACE_ROOT
  global _TF_BAZELRC
  global _TF_CURRENT_BAZEL_VERSION