code: def Wget(src_url, tgt_name, tgt_root=None):
      
      if tgt_root is None:
          tgt_root = str(CFG["tmp_dir"])
  
      from benchbuild.utils.cmd import wget
  
      tgt_file = local.path(tgt_root) / tgt_name
      if not source_required(tgt_file):
          Copy(tgt_file, ".")
          return
  
      wget(src_url, "-O", tgt_file)
      update_hash(tgt_file)
      Copy(tgt_file, ".")
docs: Download url, if required.
  
      Args:
          src_url (str): Our SOURCE url.
          tgt_name (str): The filename we want to have on disk.
          tgt_root (str): The TARGET directory for the download.
              Defaults to ``CFG["tmpdir"]``.