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Diffstat (limited to 'manual/getopt.texi')
| -rw-r--r-- | manual/getopt.texi | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/manual/getopt.texi b/manual/getopt.texi index 8e1102f911..f3934d0cfe 100644 --- a/manual/getopt.texi +++ b/manual/getopt.texi @@ -68,7 +68,8 @@ Normally these values come directly from the arguments received by The @var{options} argument is a string that specifies the option characters that are valid for this program. An option character in this string can be followed by a colon (@samp{:}) to indicate that it takes a -required argument. +required argument. If an option character is followed by two colons +(@samp{::}), its argument is optional; this is a GNU extension. If the @var{options} argument string begins with a hyphen (@samp{-}), this is treated specially. It permits arguments that are not options to be |