unable to install php5-ldap port

[Frank Bonnet]

Hello

I'm trying to install php5-ldap from ports and I'm facing
to a strange error :

ldap3# cd php5-ldap
ldap3# make config
===> No options to configure
ldap3# make
===>   php5-ldap-5.3.8 depends on file: /usr/local/bin/phpize - found
===>   php5-ldap-5.3.8 depends on file: /usr/local/bin/autoconf-2.68 - found
===>   php5-ldap-5.3.8 depends on shared library: ldap-2.4.8 - found
===>  PHPizing for php5-ldap-5.3.8
Configuring for:
PHP Api Version:         20090626
Zend Module Api No:      20090626
Zend Extension Api No:   220090626
autoconf: required version 2.68 not found
*** Error code 1

Stop in /usr/ports/net/php5-ldap.
ldap3# autoconf -v
autoconf-2.68: error: no input file


As you can see the autoconf version is OK , anyone understand what happen ?

Thanks