autoupdate(1) on Linux
The text d686a2f97e2b, as Debian 8 (Jessie) shipped it.
Update a configure.in to a newer Autoconf
Flags it lists
-
--debug -
--force -
--help -
--include -
--prepend-include -
--verbose -
--version -
-B -
-I -
-V -
-d -
-f -
-h -
-v