@subsection @code{getopt_long_only}
@findex getopt_long_only
-Gnulib module: ---
+Gnulib module: getopt-gnu
Portability problems fixed by Gnulib:
@itemize
+@item
+The function @code{getopt_long_only} does not support the @samp{+}
+flag in the options string on some platforms:
+MacOS X 10.5, AIX 5.2, OSF/1 5.1, Solaris 10.
+@item
+The function @code{getopt_long_only} does not obey the @samp{-} flag
+in the options string when @env{POSIXLY_CORRECT} is set on some platforms:
+Cygwin 1.7.0.
+@item
+The function @code{getopt_long_only} does not support options with
+optional arguments on some platforms:
+MacOS X 10.5, OpenBSD 4.0, AIX 5.2, Solaris 10, Cygwin 1.5.x.
+@item
+This function is missing on some platforms:
+MacOS X 10.3, FreeBSD 5.2.1, NetBSD 3.0, AIX 5.1, HP-UX 11, IRIX 6.5,
+OSF/1 5.1, mingw, Interix 3.5.
@end itemize
Portability problems not fixed by Gnulib:
@itemize
@item
-This function is missing on some platforms:
-MacOS X 10.3, FreeBSD 5.2.1, NetBSD 3.0, AIX 5.1, HP-UX 11, IRIX 6.5, OSF/1 5.1, mingw, Interix 3.5.
+The glibc implementation allows a complete reset of the environment,
+including re-checking for @env{POSIXLY_CORRECT}, by setting
+@code{optind} to 0. Other implementations provide @code{optreset},
+causing a reset by setting it non-zero, although it does not
+necessarily re-read @env{POSIXLY_CORRECT}.
@end itemize