Martial:

un truc non linux:
http://www.google.fr/codesearch?hl=fr&q=getopt()+show:A5Cq3hDDZ0Q:FWFWPP0rMss:A7pKizLwxNA&sa=N&cd=3&ct=rc&cs_p=ftp://ftp.jclark.com/pub/sp/sp-0.4.tar.gz&cs_f=sp-0.4/app/getopt.C

celui de la uClibc:
http://www.google.fr/codesearch?hl=fr&q=lang:C+getopt()+show:PReerYjvCbI:jtPLbSMuOes:TJr2lIxOJ6Q&sa=N&cd=18&ct=rc&cs_p=http://freshmeat.net/redir/uclibc/20616/url_bz2/uClibc-0.9.28.1.tar.bz2&cs_f=uClibc-0.9.29/libc/unistd/getopt-susv3.c#l44