Re: [PATCH 1/2] trace: document how to specify multiple --trace patterns

[John Snow]

On 1/13/21 4:48 AM, Stefan Hajnoczi wrote:
> > QEMU options are single dash with double dash accepted for compatibility but
> > help and other docs have single dash so these (and below) should be -trace.
> > (Also a bit less typing for otherwise already way too long command lines.)
> Is this documented somewhere?
>
> I was under the impression that '-' is legacy syntax and '--' is the
> preferred syntax. There are examples of '--' on the QEMU man page.
>
> Let's reach agreement, document it, and then make the documentation
> consistent.
>
> Stefan

My naive impression was that double-dash is the preferred idiom in 
linuxdom in general for any multi-character option.

We might hang on to single-dash for backwards compatibility, but I doubt 
we want to enshrine that as our preferred way.

Is there a reasoning I am unaware of?