2 @subsection @code{getopt_long_only}
3 @findex getopt_long_only
9 @ref{Getopt Long Options,,Parsing Long Options with getopt_long,libc},
12 @url{https://www.gnu.org/software/libc/manual/html_node/Getopt-Long-Options.html},
15 @uref{https://www.kernel.org/doc/man-pages/online/pages/man3/getopt_long_only.3.html,,man getopt_long_only}.
18 Gnulib module: getopt-gnu
20 Portability problems fixed by Gnulib:
23 The function @code{getopt_long_only} does not obey the combination of
24 @samp{+} and @samp{:} flags in the options string on some platforms:
27 The use of @samp{W;} in the optstring argument to does not always
28 allow @code{-W foo} to behave synonymously with @code{--foo}:
31 The function @code{getopt_long_only} does not support the @samp{+}
32 flag in the options string on some platforms:
33 Mac OS X 10.5, AIX 5.2, Solaris 10.
35 The value of @code{optind} after a missing required argument is wrong
39 The function @code{getopt_long_only} does not obey the @samp{-} flag
40 in the options string when @env{POSIXLY_CORRECT} is set on some platforms:
43 Some implementations fail to reset state, including re-checking
44 @env{POSIXLY_CORRECT}, when @code{optind} is set to @samp{0}:
47 The function @code{getopt_long_only} does not support options with
48 optional arguments on some platforms:
49 Mac OS X 10.5, OpenBSD 4.0, AIX 5.2, Solaris 11 2010-11, Cygwin 1.5.x.
51 This function is missing on some platforms:
52 FreeBSD 5.2.1, NetBSD 5.0, Minix 3.1.8, AIX 5.1, HP-UX 11, IRIX 6.5, mingw, MSVC 14.
54 This function crashes if the option string includes @code{W;} but
55 there are no long options, on some platforms:
59 Portability problems not fixed by Gnulib:
62 Some implementations return success instead of reporting an ambiguity
63 if user's option is a prefix of two long options with the same outcome:
66 The GNU Coding Standards discourage the use of @code{getopt_long_only}