public static void main(String[] args) throws Exception {
		for (String file : args) {
			try {
				accumulateXrefs(file, VERBOSE_RUN);
			} catch (Exception e) {
				System.out.println(e + " in file " + file);
			}
		}
		for (String s : refs.keySet()) {
			if (!decls.contains(s)) {
				System.out.println(refs.get(s) + " use of undeclared ref " + s);
			}
		}
	}