How to Convert dsp.FFT to arm_cfft_f32()

Hi,

I wrote some MATLAB codes containing FFT and wanna convert it into C code and run on an ARM Cortex M4 core MCU.

I've already installed Embedded Coder and Embedded Coder Support Package for ARM Cortex-M Processors.

After taking reference of the example "Verify FIR Filter on ARM Cortex-M Processor in MATLAB", I tried to do the conversion.

However, the following MATLAB coder doesn't generated the C code "arm_cfft_f32()" , but other three functions instead. (see as below). Does anyone know why?

---------------------------below is the C code generated------------------------------------------------------------------------