The preprocessor and lack of support for -V

[Neil Booth]

PR 607 is about the fact that it is impossible to run older versions of
CPP with the current preprocessor driver.  This is because we renamed
the stand-alone version to cpp0; previously it was called cpp I think,
and was renamed because of the inevitable confusion it caused.

Richard Henderson replied to the PR saying he thinks we should remove
support for -V.

What is the general opinion on this?  Should I try to hack the driver
to fix this?  Or should we document dropping support for -V and actually
drop it?  Or something else?

Neil.