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 https://sourceforge.net/p/openfoam-extend/ticketsfoamextendrelease/. If you compiled/installed on a Linux distribution that is not listed here, please contribute to the project and submit installation instructions. For instructions, see: https://sourceforge.net/p/openfoam-extend/wiki/HowToContribute/ Please also refer to the unofficial OpenFOAM Wiki for additional installation instructions: http://openfoamwiki.net/index.php/Installation/Linux/foam-extend-3.1