I think that instead of having the more recent version at the end of the version string, it should be in front of the parentheses.
So, instead of: libtool (GNU libtool 1.3016 2008-10-05) 2.2.7a
I propose: libtool 2.2.7a (GNU libtool 1.3016 2008-10-05)
The reason for this is that certain programs(Gnash BZR repository, Subversion SVN repository, etc.) appear to look inside the parentheses for the libtool version, which subsequently causes the autogen script to either fail or use the version of libtool inside the parentheses.
Thank you for you time, and I apologize if you are already aware of this.