Re: [PATCH] Yet another shell function prerequisite!

[Ralf Wildenhues]

* Paolo Bonzini wrote on Mon, Oct 13, 2008 at 07:24:10PM CEST:
> I'd okay with -, but what if unset does not work?  I planned to do
> something like
> 
>   as_lineno=; AS_UNSET([as_lineno])
> 
> but that could expand to
> 
>   as_lineno=; false as_lineno
> 
> Do we still care about "old BSD shells, including the Ultrix sh"?  How
> old are these?

Let's go with unset.  IIRC unset is more portable than ${var:-default}
(and IIRC, where the latter doesn't work, it causes the shell to abort
the script).  Having line number information fail if both are borked is
tough luck.

Cheers,
Ralf