[Ada 3.3] Backport compilation fixes

[Gabriel Dos Reis]

Roger Sayle <roger@eyesopen.com> writes:

| On 17 Dec 2003, Gabriel Dos Reis wrote:
| > I don't want to mess with Ada issues :-)
| > If Ada folks think that ability to build previous versions of GNAT
| > with recent bootstrapping compilers is of no value for their
| > community, I see no reason to endorse that initiative -- even though
| > I can fully see the benefits for GCC developers.
| 
| Then perhaps we just need an improved autoconf/configure test, so
| that we don't *by default* attempt to build the ada front-end when
| we know in advance that this will fail.  A fatal error in the bootstrap
| process not only affects Ada, but the entire GCC distribution.

Yes. I completely agree with your assessment.  My impression is that,
historically, within the GCC-3.3.x series, configuration and
bootstrapping process are some of the troublesome areas I've seen
no much support, interest or initiative from Ada folk.  

If Ada maintainers have no interest in GCC-3.3.x, why can't we just
disable that front-end during configuration?  Arnaud, do you have
objections? 

-- Gaby