Aight, I dug into cmake a bit and found that i only needed to change <xmpdir>/build/shared/ToolchainLLVM.cmake to set the correct XMP_OSX_SDK
that also solved the problems of not being able to compile the sample projects.
In XCode it still shows up as a custom entry with "SDK not found" but the path is correct and I think XCode also figures it out when linking (cant recall if I tested)
Anyway its enough for CMake to find its way and I still manually changed it to use the latest SDK for my project...
I didnt get the static libraries to actually work yet but thats probably due to my noobness at dephicering compiler errors and nothing related to your project
I'll try to use the frameworks, maybe I have better luck with those =)
UPDATE: My C++ Standard Library was set to libc++ which is the compiler default.
I changed it to libstdc++ and it compiled. Maybe the default was changed, I dont know really, couldnt be bothered to find out though
Only included the header files so far but I'm fairly confident its going to work.
Have to figure out how to nicely include it into my project. Guess it's going to be a wrapper, not sure about how to do that but lots of light at the end of the tunnel...
Thanks for your support