Re: RFA: Make cli-out follow gdb_stdout

[Andrew Cagney <ac131313@ges.redhat.com>]

> I'm not thrilled with it myself.  Let me explain what I'm trying to do,
> and let's see if we can come up with a better model.
> 
> I have a function which temporarily redirects GDB's output.  How does
> it do this?  Well, the best way seems to be to modify
> gdb_std{out,err,log}.  But the old value of gdb_stdout is cached in the
> cli_out object.

So the assertion:

	global uiout->stream->ui_file == global gdb_stdout

doesn't hold :-(

> The two minimal solutions were the one above (using a ui_file**) or
> hardcoding gdb_stdout (since that's the only thing it's ever used for
> at present).  They're both a bit of a step backwards.  I could provide
> methods to query and set the underlying stream of a ui_out object, but
> the differences between the different ui_out objects make that a little
> awkward.  Would that be better?

Both of those are still wrong.  The global gdb_stdout should be going 
away replaced with some sort of explicitly parameterized i/o object. 
That is why catch_exceptions() takes a ui_out.

enjoy,
Andrew