Function usage

compiler/cpp/src/thrift/main.cc:679–683

* Display the usage message and then exit with an error code. */

 * Display the usage message and then exit with an error code.
 */
void usage() {
  fprintf(stderr, "Usage: thrift [options] file\n\n");
  fprintf(stderr, "Use thrift -help for a list of options\n");
  exit(1);
}

/**
 * Diplays the help message and then exits with an error code.