Re: Memory limits in Ada where Fortran has none

[Martin Krischik <martin@krischik.com>]

Dr. Adrian Wrigley wrote:

> On Mon, 07 Mar 2005 10:41:30 +0100, Martin Krischik wrote:
> 
>> I have got a AMD 64 GNAT right here. Works fine as long as you remember
>> to use -fPIC. Of course any program relying on access types and 'Address
>> beeing 32 bit will fail - most notably this includes trace utilities.

> Presumably this is compatible with the LP64 model of the universe with
> C longs and pointers being 64-bit, and ints at 32 bits(?)
> GNAT "Integer"s stay at 32 bits?

Yes, that's the way it works. And so an Unchecked_Convertion from Address to
Integer will fail now. 

> Did you build the compiler yourself?

Yes.

> (can it be cross-compiled with 
> the x86 GNAT?)

In theory yes but is is easier to compile with the targes OS.

> What about third party GNAT packages (Florist? 
> GtkAda? PolyORB?)  Which OS version?

Most Libs work, but from those you named I have tried only:
PolyORB and it works fine exept for -fPIC (shared libs).

> I'd love to move to 64 bit systems, but the cost and risk of getting
> new hardware and (probably) building all the libraries still puts me off!

With AMD 64 you can allways install both 32 bit and 64 bit Linux parallel.

> A success story from a c.l.a 'local' would probably be enough to
> make me have a go.

Martin
-- 
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Ada programming at: http://ada.krischik.com