You will have to add that preprocessor definition FL_CPP11 to both Debug and Release. The rest are automatically created by cmake. By the way, you can create the entire Xcode project of fuzzylite by doing:
$ cd fuzzylite
$ cmake . -G"Xcode"
$ open fuzzylite.xcodeproj/
Please, use these steps to create your fuzzylite project. There are several variables that are set in CMake, and I am afraid you will not have them unless you create the project as aforementioned. However, I am not sure how to turn this new project into an iOS library.