libstdc++, autoconf, and /lib/cpp (was Fw: Re: GCC 3.0 Status , Report)

[Benjamin Kosnik]

> Shouldn't have to do either one, or shouldn't have to do the --with?

To do --with unless doing a canadian cross.

> CXXCPP is being passed down, it's just incorrect because autoconf believes
> that "xgcc -E" doesn't work properly (since stdlib.h couldn't be found).

Then perhaps AC_PROG_CXXCPP needs to be done so that it's 
$(blddir)/../../gcc/xgcc -B./ -E

or whatever.

Capiche?

> It feels like we're papering over a problem... i.e., if things like
> stdlib.h can't be found by the newly-built xgcc during configure, I can't
> wait until we actually try and compile the library.

Let's just try forcing CXXCPP to be the right thing then.

-benjamin