I think there is a little mistake on rawpedia.
These are the instructions:
cd ~/repo-rt
rm -rf build; make clean; ./clean
mkdir build && cd build
cmake … [a lot of params…]
make -j8 install
mv release ~/rt
in the second row, the ‘make clean; ./clean’ produces the error (on my pc):
make: *** No rule to make target `clean’. Stop.
bash: ./clean: No such file or directory
there is no problem, because the compilation is anyway successful, but I think that it needs a fix (or do I need a fix? 
).
Thanks a lot for the software, I’m using locallab branch. Excellent!