Drupal MySQL errors on fresh Ubuntu 10.04 + LAMP

I have just followed the guide to setting up LAMP on Ubuntu 10.04 here http://library.linode.com/lamp-guides/u … .04-lucid/">http://library.linode.com/lamp-guides/ubuntu-10.04-lucid/

I am trying to move a Drupal 7 site to this install but am getting an error -

Fatal error: Undefined class constant 'MYSQLATTRUSEBUFFEREDQUERY' in /srv/www/mysite.com/public_html/includes/database/mysql/database.inc on line 43

I googled the error and it looks like I need to install pdo - so I tried

pecl install pdo

pecl install pdo_mysql

but get "make" failed for the pdo install and

`/root/tmp/pear/temp/PDOMYSQL/configure' failed for the pdomysql install

Any help is greatly appreciated!