optind seems to need unistd.h, not only getopt.h
--- e2fsprogs-1.41.12.orig/misc/e2undo.c	2010-05-14 00:59:49.000000000 +0200
+++ e2fsprogs-1.41.12/misc/e2undo.c	2010-10-18 12:03:49.329511558 +0200
@@ -19,6 +19,7 @@
 #if HAVE_ERRNO_H
 #include <errno.h>
 #endif
+#include <unistd.h>
 #include "ext2fs/tdb.h"
 #include "ext2fs/ext2fs.h"
 #include "nls-enable.h"