code generation for FFT is void

I want to generate code from my m-code which computes an FFT. When I see the results the c-function is void when the result should be a complex double?

Answer 1

[Walter Roberson]

The generated code has pointers passed in to it. C cannot handle multiple outputs, so Mathworks generates code that passes in pointers for all outputs, rather than special-casing the first output.

[wietjes]

And how do I extract the results from the function?