testing consistency

[Dave Avery]

Joe Buck wrote:
 
> This means that we should make sure to test the compilers that are built
> by following the (yet to be written) instructions exactly, that is,
> bootstrap the compiler and build with "-O2 -g", then doing tests with
> "clean" environments (nothing else installed: e.g. no libg++ if it isn't
> part of egcs).  Additional tests with higher optimization levels and
> extra headers are welcome but should be considered "extra".

also we should check -Ox without -g .  I know in the past this
combination was explicitly noted as possibly dangerous

dave