depends on :
$ sudo apt-get install doxygen cmake tcllib tklib tcl-dev tk-dev libfreetype-dev libx11-dev libgl1-mesa-dev libfreeimage-dev rapidjson-dev
$ sudo apt-get install libxmu-dev libxi-dev libfreeimage3 libfreeimage-dev ffmpeg
to install in /opt/opencascade/ folder :
$ sudo dpkg -i opencascade.deb