build problem trying to upgrade a 7.0 system

[doug]

bcr:/usr/ports/databases/php5-pdo# make
===>   php5-pdo-5.2.10 depends on file: /usr/local/bin/phpize - found
===>   php5-pdo-5.2.10 depends on file: /usr/local/bin/autoconf-2.62 - found
===>  PHPizing for php5-pdo-5.2.10
Configuring for:
PHP Api Version:         20041225
Zend Module Api No:      20060613
Zend Extension Api No:   220060519
exec: /usr/local/bin/autom4te-2.62: not found
*** Error code 1

autom4te-2.62 is a perl script and is present:

   bcr:~# which autom4te-2.62
   /usr/local/bin/autom4te-2.62

bcr:/usr/local/bin# ls -l auto*
lrwxr-xr-x  1 root  wheel      16 Jul 20  2009 autoconf@ -> autoconf-wrapper
-r-xr-xr-x  1 root  wheel   14657 Jul 20  2009 autoconf-2.62*
-r-xr-xr-x  1 root  wheel    3318 Jul 20  2009 autoconf-wrapper*
lrwxr-xr-x  1 root  wheel      16 Jul 20  2009 autoheader@ -> autoconf-wrapper
-r-xr-xr-x  1 root  wheel    8507 Jul 20  2009 autoheader-2.62*
lrwxr-xr-x  1 root  wheel      16 Jul 20  2009 autom4te@ -> autoconf-wrapper
-r-xr-xr-x  1 root  wheel   31522 Jul 20  2009 autom4te-2.62*
lrwxr-xr-x  1 root  wheel      16 Jul 20  2009 automake@ -> automake-wrapper
-r-xr-xr-x  1 root  wheel  233475 Jul 20  2009 automake-1.10*
-r-xr-xr-x  1 root  wheel    3266 Jul 20  2009 automake-wrapper*
-r-xr-xr-x  1 root  wheel   18489 Jul 20  2009 autopoint*
lrwxr-xr-x  1 root  wheel      16 Jul 20  2009 autoreconf@ -> autoconf-wrapper
-r-xr-xr-x  1 root  wheel   20268 Jul 20  2009 autoreconf-2.62*
lrwxr-xr-x  1 root  wheel      16 Jul 20  2009 autoscan@ -> autoconf-wrapper
-r-xr-xr-x  1 root  wheel   17091 Jul 20  2009 autoscan-2.62*
-r-xr-xr-x  1 root  wheel   33693 Jul 20  2009 autoupdate-2.62*
lrwxr-xr-x  1 root  wheel      16 Jul 20  2009 autoupdates@ -> autoconf-wrapper
bcr:/usr/local/bin# ls -l autom4te-2.62
-r-xr-xr-x  1 root  wheel  31522 Jul 20  2009 autom4te-2.62*

Some is amiss as:

   bcr:~# /usr/local/bin/autom4te-2.62
   /usr/local/bin/autom4te-2.62: Command not found.

How do I find out what the actual error is?