Re: patch to invalidate Autom4te cache upon upgrade

[Paul Eggert]

Following up to your May 25 message
<http://lists.gnu.org/archive/html/autoconf/2006-05/msg00127.html> re
Debian bug 219621, I was thinking of incorporating the proposed fix
into Autoconf before the 2.61 release, but ran into a couple of
problems:

Using the timestamp as a version number is a bit of a hack.  Perhaps
it'd be better to use the Autoconf version number, i.e., the first
line of $version in bin/autom4te.in.

Second and more trivially, I'd feel a bit more comfortable matching
the entire first line of the cache file, rather than looking for a
space, followed by the version number, followed by any single
character, at the end of the first line.

I hope these changes would be OK with you.  But at any rate this
should wait until after 2.61 is out, since my ideas haven't been
tested.