Error using Rapid Accelerator on a Mac 10.9, XCode 5.1

I am trying to run some simulations using MATLAB Simulink on a Mac 10.9, with XCode 5.1. At first I had some problems with the mex file, but at last I could figure it out and now in "Normal" mode, I can perform my simulations. However, if I try to run the same file in Rapid Accelerator mode, I get the following error:

/Applications/MATLAB_R2012b.app/extern/include/tmwtypes.h:819:9: error: unknown type name 'char16_t' typedef char16_t CHAR16_T; ^ 1 error generated.

I had the same problem in the normal mode and adding "-Dchar16_t=uint16_T" solved it, but now I get this error in Rapid Accelerator mode.