Re: [PATCH] Ignore boilerplate logo from MSVC on stderr.

[Paolo Bonzini]

On 11/18/2010 06:47 AM, Peter Rosin wrote:
> > >
> > >  For example, the N command might cause 'sed' to exit in some cases.
> > >  Autoconf needs to be fairly conservative about unusual 'sed' commands
> > >  such as 'N', as 'sed' implementations are not always bug-free.
> I didn't recognize that one, so I looked it up in the limitations of
> sed section of the manual and it's not listed there.  Perhaps it should
> be?  But while doing that, I did find
>
>         Unicos 9 sed loops endlessly on patterns like ‘.*\n.*’.
>
> which I somehow missed before.  Case closed, the fat lady has sung.

I don't think so.  Is Unicos 9 relevant (15 year old)?  Maybe this is 
worth detecting anyway in AC_PROG_SED?

To fix the problem that Paul mentioned, just add a "$b" command before 
the "N" commands.

Paolo