5 POSIX specification: @url{http://www.opengroup.org/onlinepubs/9699919799/functions/getopt.html}
7 Gnulib module: getopt-posix or getopt-gnu
9 The module @code{getopt-gnu} has support for ``long options'' and for
10 ``options that take optional arguments''. Compared to the API defined by POSIX,
11 it adds a header file @code{<getopt.h>} and a function @code{getopt_long}.
13 Portability problems fixed by either Gnulib module @code{getopt-posix} or @code{getopt-gnu}:
16 The @code{getopt} function keeps some internal state that cannot be explicitly
17 reset on some platforms:
21 Portability problems fixed by Gnulib module @code{getopt-gnu}:
24 The function @code{getopt} does not support the @samp{+} flag in the options
25 string on some platforms:
26 MacOS X 10.5, AIX 5.2, HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 10.
28 The function @code{getopt} does not support options with optional arguments
30 MacOS X 10.5, OpenBSD 4.0, AIX 5.2, HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin.
32 The function @code{getopt_long} is missing on some platforms:
33 AIX 5.1, HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 9, Interix 3.5.
36 Portability problems not fixed by Gnulib:
39 The default behavior of the glibc implementation of @code{getopt} allows
40 mixing option and non-option arguments on the command line in any order.
41 Other implementations, such as the one in Cygwin, enforce strict POSIX
42 compliance: they require that the option arguments precede the non-option
43 arguments. This is something to watch out in your program's testsuite.
45 The function @code{getopt_long_only} is missing on some platforms:
46 MacOS X 10.3, FreeBSD 5.2.1, NetBSD 3.0, AIX 5.1, HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 9, mingw, Interix 3.5.