[help-gengetopt] show help if no input

[Duke]

 Hi folks,

I just heard about gengetopt, tried it and like it very much. I want to 
change the default reaction of gengetopt a little bit to suit my purpose 
better, so I have two questions below:

 * When Print help, is there a way showing that one option is optional 
and the other is required? For now, help shows only options and their 
descriptions and values, no way to know if an option is optional or 
required until one tries the program and some of its options.

 * When there is no input (no argument or argc < 2), is there a way of 
telling gengetopt to show help, even if there are required options? For 
now, if there is required option, and if the program is invoked without 
argument, then "option required" shows up, not the help.

Thanks,

D.