getlogin, getlogin_r: Avoid test failure.

[gnulib.git] / doc / glibc-functions / getopt_long_only.texi

diff --git a/doc/glibc-functions/getopt_long_only.texi b/doc/glibc-functions/getopt_long_only.texi
index ed6cd7b..13edfb4 100644 (file)
--- a/doc/glibc-functions/getopt_long_only.texi
+++ b/doc/glibc-functions/getopt_long_only.texi
@@ -15,6 +15,10 @@ 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
+Some implementations fail to reset state, including re-checking
+@env{POSIXLY_CORRECT}, when @code{optind} is set to @samp{0}:
+NetBSD, 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.
@@ -27,9 +31,14 @@ OSF/1 5.1, mingw, Interix 3.5.
 Portability problems not fixed by Gnulib:
 @itemize
 @item
-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}.
+The glibc extension of using @samp{W;} in the optstring argument to
+allow @code{-W foo} to behave synonymously with @code{--foo} is not
+very reliable.
+@item
+Some implementations return success instead of reporting an ambiguity
+if user's option is a prefix of two long options with the same flag:
+FreeBSD.
+@item
+Mixing a leading @samp{-} or @samp{+} with a leading @samp{:} in the
+optstring argument has inconsistent effects across platforms.
 @end itemize