Error build pecl-memcache

[Vladislav V. Prodan]

Requires autoconf-2.68, in spite of its presence in the system.
make clean does not help.

=> SHA256 Checksum OK for PECL/memcache-3.0.6.tgz.
===>  Patching for pecl-memcache-3.0.6
===>   Converting DOS text files to UNIX text files
===>   pecl-memcache-3.0.6 depends on file: 
/usr/local/include/php/main/php.h - found
===>   pecl-memcache-3.0.6 depends on file: /usr/local/bin/phpize - found
===>   pecl-memcache-3.0.6 depends on file: 
/usr/local/lib/php/20090626-debug/zlib.so - found
===>   pecl-memcache-3.0.6 depends on file: 
/usr/local/lib/php/20090626-debug/session.so - found
===>   pecl-memcache-3.0.6 depends on file: /usr/local/bin/autoconf-2.68 
- found
===>  PHPizing for pecl-memcache-3.0.6
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


# pkg_info | grep auto
autoconf-2.13.000227_6 Automatically configure source code on many Un*x 
platforms
autoconf-2.68       Automatically configure source code on many Un*x 
platforms
autoconf-wrapper-20071109 Wrapper script for GNU autoconf
automake-1.11.1     GNU Standards-compliant Makefile generator (1.11)
automake-wrapper-20101119 Wrapper script for GNU automake


# php -v
PHP 5.3.5 (cli) (built: Apr  7 2011 19:32:34) (DEBUG)
Copyright (c) 1997-2010 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2010 Zend Technologies
     with XCache v1.3.0, Copyright (c) 2005-2009, by mOo
     with Xdebug v2.1.0, Copyright (c) 2002-2010, by Derick Rethans

Thank you in advance for your help.

-- 
Vladislav V. Prodan
VVP24-UANIC
+380[67]4584408
+380[99]4060508
vlad11 at jabber.ru