<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def verify_binary(flag_name, process_args=None):
 """Exits the program if the binary from the given flag doesn't run. Args: flag_name: Name of the flag that should be the path to the binary. process_args: Args to pass to the binary to do nothing but verify that it's working correctly (something like "--version") is good. Optional. Defaults to no args. Raises: SystemExit with error if the process did not work. """

    if process_args is None:
        process_args = []

    path = getattr(FLAGS, flag_name)
    if not path:
        logging.error('Flag %r not set' % flag_name)
        sys.exit(1)

    with open(os.devnull, 'w') as dev_null:
        try:
            subprocess.check_call(
                [path] + process_args,
                stdout=dev_null,
                stderr=subprocess.STDOUT)
        except:
            logging.exception('--%s binary at path %r does not work',
                              flag_name, path)
            sys.exit(1)