converting matlab code to c code readiness error

Question

I want to convert my matlab code to c code.But when i am trying to do do lots of warnings are comping in the code readiness report. Although I have sorted out a lot of issues but still there are some functions which are not supported and i need some alternative.

Kindly tell me any alternative codes for the errors.

Let me be more specific: these are the lines of the function that are causing some issue-:

  fn = fieldnames(pars); %current parametres fieldnames
  main_fn = {'algorithm'};

  pm_fn =     

     {'pm_tau','pm_window','pm_keypoints','pm_harris_prctile','pm_searchrange'};

     m_fn =    
    {'window','range','tau','epsilon','growing','init_seeds_accept',
 'seeds_accept','searchrange','searchrangeV',
   'max_candidates','vis_step','mu','csbeta','csalgorithm','grow_version'};

Now in this it is saying that code generation only supports cell operations for varargin and vararout

the error screenshot