@node optopt @section @code{optopt} @findex optopt POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/optopt.html} Gnulib module: --- Portability problems fixed by Gnulib: @itemize @end itemize Portability problems not fixed by Gnulib: @itemize @item This variable is missing on some platforms: Mac OS X 10.5, IRIX 6.5, OSF/1 5.1, MSVC 9. @end itemize