[RFC] Cleaning and extening the diagnostics machinery

[Neil Booth]

Gabriel Dos Reis wrote:-

> I've been thinking about all these possibilities, including showing
> the diagnotic location in the middle of the diagnostics (making the
> whole message more readable) but one can get quickly very far, but
> with no concrete way to satisfy everbody :-(

You probably *can* keep everyone happy, by providing the flexibility
through (hopefully just one) command line option.  It would just
require a bit of flexibility in the diagnostic printing code to do it
different ways.

Dejagnu still breaks when cpplib puts column numbers after the line
numbers.  That's really annoying.

Neil.