> - while ((ret = getopt_long(argc, argv, "", longopts, &index)) != -1) {
> + while ((ret = getopt_long_only(argc, argv, "d:f:m:sh", longopts, &index)) != -1) {
Hmm. From the manpage:
"(If the program accepts only long options, then optstring should be specified
as an empty string (""), not NULL.)"
So I think the empty opstring should remain.
Also later in the man page:
" getopt_long_only() is like getopt_long(), but '-' as well as "--" can
indicate a long option."
So maybe my advise to switch to getopt_long_only wasn't needed or is
even not that helpful. Sorry, it's been a while since I wrote programs
with non-trivial option parsing.
