-dnl Set the backup prefix
-undefine([backup-prefix])dnl
-AC_ARG_WITH([backup-prefix],
- [ --with-backup-prefix=, set the backup prefix [,]])
-if test x"$with_backup_prefix" != x -a x"$with_backup_prefix" != x"no"; then
- backup_prefix="$with_backup_prefix"
-else
- backup_prefix=","
-fi
-AC_DEFINE_UNQUOTED(BACKUP_PREFIX, "$backup_prefix")dnl
-