I posted these instructions for installing on Raspbian Jessie a while ago on a pistonsheads TVR discussion of RG. Obviously use the latest version rather than the one given here:
Download the latest source files from the github
https://github.com/colinbourassa/rovergauge/releas... and extract
tar.gz file to an appropriate place on your pi. Also download the libcomm14cux source
https://github.com/colinbourassa/libcomm14cux/rele... and extract to another folder.
I
am not sure if you need all of this QT5 stuff but it is what I
installed as I initially thought I was going to have to compile from
within QT:
sudo apt-get update
sudo apt-get upgrade
sudo apt-get install cmake
sudo apt-get install qtcreator
sudo apt-get install qt5-qmake
sudo apt-get install qt5-default
Create a folder in each of the extracted folders (libcomm14cux-2.1.1 & rovergauge-0.8.4) called something like 'build'.
cd to each of your two empty build folders and run the following from there (you may need to do libcomm14cux first?):
cmake ..
make
sudo make install
If all has gone well you should now have a working rovergauge executable in your rovergauge build folder!
If you want to record log files you need to add a folder called logs to your working directory.
Jessie seems to already have all the drivers for the FTDI cable installed.
Good luck!