Here you can find build instructions for foam-extend-3.1 . The instructions for
different Linux distributions are in corresponding sub-folders. If you need to
take different or additional steps to get foam-extend compiled on your machine,
please file a bug at http://sourceforge.net/apps/mantisbt/openfoam-extend/.

If you compiled/installed on a Linux distribution that is not listed here,
please contribute to the project and submit installation instructions. Contact
the project admins on http://sourceforge.net/projects/openfoam-extend/ for
details.

Please also refer to the unofficial OpenFOAM Wiki for additional installation
instructions:
http://openfoamwiki.net/index.php/Installation/Linux/foam-extend-3.0