Today I was asked to add PDO support to PHP on our development box, which I thought was running Ubuntu Feisty Fawn. The first problem is that it's not running Feisty Fawn, its running Edgy Eft, which is an older version. The next problem is that the PDO libraries weren't bundled with Eft.

PDO is available in PECL so, using these instructions from Rich Buggy I grabbed the mysql client development libraries from aptitude and then got the PDO libraries I needed.