[Ada] Bootstrapping mainline GNAT fails

[Florian Weimer]

Laurent Guerby <guerby@acm.org> writes:

> I got the same error when bootstraping with a 3.13 GNAT, but got
> past it in another bootstrap by using of my previous GNAT build from
> CVS GCC as build compiler instead (my build is currently in stage
> 3). I'll try to work out the details of what works.

Some additional data points:

  - Bootstrapping with ACT GNAT 3.14p binaries works on Debian/x86
    unstable and Red Hat 7.1 (using the 2.8.1-based C compiler
    supplied by ACT).

  - Bootstrapping with CC=gnatgcc works on Debian/x86 unstable.

  - Bootstrapping with CC=gcc-3.0 does NOT work on Debian/x86 unstable.

  - Bootstrapping with CC=gcc (2.95.4 20011002 (Debian prerelease))
    does NOT work either.

Since people can use CC=gnatgcc (thus using the 2.8.1-based C
compiler), or, if it is not available, GCC 3.1, I don't think this is
a real problem.  We only have to document this somewhere.