FreeBSD Port: pear-mailparse-0.9.1

[Jake Stride]

I am currently trying to compile mailparse on freebsd-4.8 by it bombs 
out with the errors below. Do you have any ideas at all?

Thanks

Jake

===>   pear-mailparse-0.9.1 depends on executable: automake - found
===>   pear-mailparse-0.9.1 depends on executable: autoconf - not found
===>    Verifying install for autoconf in /usr/ports/devel/autoconf213
===>   Returning to build of pear-mailparse-0.9.1
===>   pear-mailparse-0.9.1 depends on file: /usr/local/bin/phpize - 
found
===>   pear-mailparse-0.9.1 depends on file: 
/usr/local/lib/php/PEAR.php.dist - found
===>   pear-mailparse-0.9.1 depends on file: 
/usr/local/libexec/autoconf213/autoconf - found
===>   pear-mailparse-0.9.1 depends on executable: libtool - found
===>  Configuring for pear-mailparse-0.9.1
cp: aclocal.m4: No such file or directory
*** Error code 1

Stop in /usr/ports/mail/pear-mailparse.