We don't have specific instructions on how to do that but it should be possible. You shouldn't have to compile anything (except for unusual situations), you will just have to install the appropriate package and restart the web server. So on the JumpBox as the admin user:

sudo apt-get update
sudo apt-get install php5-ldap
sudo /etc/init.d/apache2 restart

That ought to include the php LDAP library. There may be some additional configuration required. It looks like setting that up can get a bit messy but maybe it will go smoothly.

Good luck

Austin