Hi,
I think you should be instantiating your engines as Engine* engine = new Engine;, without the ().
If the following statement is failing, Engine * engine = new Engine("NAME");, I would strongly recommend that you make sure the compilation of the library was successful. For some reason, it seems you are having issues with std::string, which is quite weird.
Perhaps there are some settings in the TORCS project you are working on that may be affecting fuzzylite?
Have you tried using fuzzylite outside of TORCS just for the sake of making sure the compilation of fuzzylite was correct? Please try this one first, and let me know.
Cheers.