The aquaterm driver uses  to display plots and is only available for Mac OS X.
Download the dmg file from the Aquaterm Homepage at http://sourceforge.net/project/showfiles.php?group_id=39915 and install the Aquaterm.pkg file contained therein. The library as well as the necessary header files are installed at the corresponding places. cmake will now find and enable the aquaterm driver.
Fink package manager
The other way to install Aquaterm is via the fink package manager.
Aquaterm is also available via Macports. To install Aquaterm open the terminmal and enter
sudo port install aquaterm