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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: Interfacing Ada with C
Date: Mon, 26 Jul 2010 20:46:10 +0100
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Date: 2010-07-26T20:46:10+01:00
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Ada novice <posts@gmx.us> writes:
> On Jul 26, 1:21 am, Simon Wright <si...@pushface.org> wrote:
>
>> I've encoded a general complex eigenvalues function, interfacing to the
>> LAPACK procedure zgeev

> Thank you very much for your commendable efforts. This is a very good
> example to demonstrate how Ada can be binded with LAPACK.

Well, it's a start!

>>(b) the results
>> are the same with GNAT GPL 2010 and GCC 4.5.0, (c) the output looks good
>> (from your inputs) ..
>>
>>    $ ./test_zgeev
>>     2.00000000000000E+00  4.00000000000000E+00
>>     2.00000000000000E+00 -4.00000000000000E+00
>>     9.99999999999996E-01  2.07319734774360E-16
>
>
> I have Win XP and gcc (GCC) 4.3.6 20100603 for GNAT GPL 2010
> (20100603). I get slightly different output:
>
>  1.99999999999999E+00  3.99999999999999E+00
>  2.00000000000000E+00 -4.00000000000000E+00
>  1.00000000000000E+00 -3.45920620709768E-16
>
> Your GCC version is more recent than mine. Maybe this is causing the
> discrepancies or maybe it's because of your different OS. Did you
> install your GCC separately? I got mine bundled with the GNAT GPL
> 2010.

Mine was part of GNAT GPL 2010, but on Mac OS X LAPACK and BLAS come
with the OS; I suspect that on Windows they don't.