libstdc++-v3 + libstdc++ + libio + CVS gcc

[Benjamin Kosnik]

> With that change, people don't have to pass -fhonor-std every time
> they invoke a libstdc++-v3 based compiler. The default configuration
> should just work, allowing

Later versions of this patch do this. It looks like I missed config.if and
INTERFACE, so that installed headers where not being called correctly. 

I've fixed this, and posted the resulting patch to gcc-patches. I suggest
the resulting discussion move over to this thread:

http://gcc.gnu.org/ml/gcc-patches/2000-04/msg00207.html

-benjamin