How to use patch

1. Download original GroundTram source and extract.

 $ wget -nd http://www.biglab.org/src/ground_tram-0.9.3.tgz
 $ gzip -cd ground_tram-0.9.3.tgz | tar xvf -

2. Apply patch

 $ pushd ground_tram-0.9.3
 $ patch -p3 < ground_tram-0.9.3-patch.txt

3. Build (and install) GRondTram  

 $ ./configure
 $ make