unknown type name 'class' in simulink code generation

Hi, I'm using the Matlab system function in Simulink for code generation on Arduino.

I have managed to compile simple code on Arduino but when I started to use Arduino libraries Simulink was not able to compile classes in those libraries.

It returns the following error for SPI.h libray:

error: unknown type name 'class'

class SPISettings { ^

Does anyone know a solution?