On 1/18/06, Charles Marcus <[EMAIL PROTECTED]> wrote:
> This may be the ultimate dumb question, but no amount of googling could
> satisfy my ignorance...
>
> Is there any difference? If not, why are the double hyphens almost
> always specified?

-- is the GNU getopt syntax for long options.  For normal GNU programs:

--opt is processed as a single option ("opt")
-opt is processed as 6 options ('o', 'p', and 't').

--sync is correct.  -sync is wrong and generates an error.  "sync"
also works, but only because portage specifically looks for it.

-Richard

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