It would be nice to have all the includes in fix8 source tree to be relative to project root. Like, instead of just including <f8includes.hpp>, make it "$PROJECT_ROOT/f8includes.hpp". That would help IDE to find includes in project w/o tweaking IDE paths.
BTW, all the public includes could be moved to include folder, sources to src folder, private includes to src folder with corresponding #include to "fix8/include/xxx" an "fix8/src/xxx".
Ubuntu 13.10 x64 gcc4.8