-dnl Set the backup prefix
-undefine([backup-prefix])dnl
-AC_ARG_WITH([hash-backup],
- [ --with-hash-backup use # as the backup prefix (default: ,)])
-if test x"$with_hash_backup" != x -a x"$with_hash_backup" != x"no"; then
- backup_prefix="#"
-else
- backup_prefix=","
-fi
-AC_DEFINE_UNQUOTED(BACKUP_PREFIX, "$backup_prefix")dnl
-