[distcc] gcc bootstraps with distcc

[Neil Booth]

Alexandre Oliva wrote:-

> Ok, bootstrapped on i686-pc-linux-gnu, regression tested, no
> regressions.  I'm checking this patch in.  It includes a testcase that
> will let us know in case we unintentionally change behavior.
> 
> I think with this change all cb_line_change implementations have
> parsing_args unused.  Should we remove it?

Please.  I was going to ask you to do it, but didn't want to
make you do too much 8-)

Neil.