Specify the Location of custom IP cores in HDL Coder

I was following along with the instructions here: https://www.mathworks.com/help/hdlcoder/ug/define-and-add-ip-respository-to-custom-reference-design.html for adding a custom IP repository. It mentions you can specify a directory outside of the MATLAB path by specifying an output parameter:

function [ipList, rootDir] = hdlcoder_video_iplist( )

How can you specify the directory if it is an output parameter? Shouldn't the directory be specified as an input?

Answer 1

[Walter Roberson]

hdlcoder_<NAME>_iplist are configuration functions that you create yourself. If you want the output files to be stored in a different place then you can specify the output directory as the second output of the function.

The functions that you create will be called with no input parameters.