Re: gnat 3.12p with gcc 2.95.2

[Robert Dewar <robert_dewar@my-deja.com>]

In article <3928E9D2.70DBF0B4@mathematik.uni-dortmund.de>,
  Jens Acker <Jens.Acker@mathematik.uni-dortmund.de> wrote:

> Is it possible to build a complete gnat 3.12p system
> on top of the gcc 2.95.2 compiler suite instead of
> the gcc 2.8.1 compiler ?

The short answer is No.

The long answer is as follows:

There are two problems

1. gcc 2.95.2 has many problems and bugs that will prevent
GNAT from operating correctly. Richard Kenner (of Ada
Core Technologies) has recently completed the merge of
the GCC 2.8.1 fixes needed for correct GNAT operation
into GCC 2.96, and also fixed and cleaned up many other
things that were preventing GNAT from working. This has
involved thousands of lines of patches and new code for
GCC 2.96.

2. The interface to gcc 2.9x has changed from 2.8.1 meaning
that changes are needed in GNAT.

We anticipate that the version of GNAT *after* 3.13 will
use GCC 2.96, completing the merging of the technologies,
but it is not practical to build GNAT with gcc 2.95 period,
and not possible to build with gcc 2.96 till that version
of GNAT is available.

We are making good progress, we have a compiler that bootstraps
correctly on at least one target, builds the library, and passes
all but two ACVC tests. Now we need to build on other targets,
correct those remaining ACVC problems, and run the Ada Core
Technologies test suite.

Robert Dewar
Ada Core Technologies


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