thank you for your post.
Can you please specify what are you using:
– Ubuntu version
– Clang or GNU g++, and versions
Also, what error occurs when you try to execute ObstacleAvoidance?
Please, have a read at the updated compile instructions for fuzzylite 6 at https://github.com/fuzzylite/fuzzylite#compile-link-and-execute
Also, please have a look at the sample project available at https://github.com/fuzzylite/fuzzylite/tree/release/examples/application . You should take a look at the definitions made in the CMakeList file.