This function generates the CLSF for all the operations contained in
the specified group of the specified setup. It will use the instructions
(i.e., the Definition File and Event Handler) specified by 'clsf_name'. It
will write the generated CLSF to a file with name 'output_filename'. If
'output_filename' exists it will be erased before writing new data to it.
See the Note in the File Description regarding the relationship between the
'clsf_name' and the CAM resource files.