PATCH RFA: Build stages 2 and 3 with C++

[David Edelsohn]

On Wed, Jul 20, 2011 at 5:43 AM, Jonathan Wakely <jwakely.gcc@gmail.com> wrote:

> Paolo has committed a change to that code, does it help the AIX bootstrap issue?

Paolo's patch gets me past the debug.cc issue.

Using C++ on AIX will greatly increase the bootstrap time on AIX
because configure is much slower, even using Bash instead of AIX Ksh.

And, as this libstdc++ typo demonstrates, using C++ with the
development version of libstdc++ makes the bootstrap process more
fragile because bootstrap now relies on a complex, additional codebase
that is not stable.  GMP, MPFR, MPC, CLooG and PPL add large, external
codebases, but at least they do not change from build to build, even
if they are built in the tree.

- David