Error trying to run Robotino Circle Example with Robotino API2

[Andres12V]

I followed the tutorial in the following link:

https://www.daslhub.org/unlv/wiki/doku.php?id=robotino_api2_setup

And when i run:
$ make

First appears this:

[ 50%] Linking CXX executable example_circle
/usr/bin/ld: warning: librec_robotino_rpc.so, needed by /opt/robotino/lib/librec_robotino_api2.so, not found (try using -rpath or -rpath-link)
/usr/bin/ld: warning: librec_rpc.so, needed by /opt/robotino/lib/librec_robotino_api2.so, not found (try using -rpath or -rpath-link)

And at the end appears:

collect2: error: ld returned 1 exit status
CMakeFiles/example_circle.dir/build.make:95: fail in the instructions fot target 'example_circle'
make[2]: *** [example_circle] Error 1
CMakeFiles/Makefile2:67: fail in the instructions fot target 'CMakeFiles/example_circle.dir/all'
make[1]: *** [CMakeFiles/example_circle.dir/all] Error 2
Makefile:83: fail in the instructions fot target 'all'
make: *** [all] Error 2

Any idea?