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From: "Randy Brukardt" <randy@rrsoftware.com>
Newsgroups: comp.lang.ada
References: <1132349753.719540.119910@g44g2000cwa.googlegroups.com>
 <m2wtj56qdv.fsf@grendel.local>
Subject: Re: Allocated aligned arrays
Date: Tue, 22 Nov 2005 18:17:50 -0600
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Date: 2005-11-22T18:17:50-06:00
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"Simon Wright" <simon@pushface.org> wrote in message
news:m2wtj56qdv.fsf@grendel.local...
> "ldb" <louis@pittpatt.com> writes:
...
> > However, the three matricies, input, sam, and bob aren't necessarily
> > aligned (for certain input index ranges they are, by default, and some
> > times they are not. The alignment statement I am using seems to have no
> > effect).
>
> A little experiment here shows that GCC 4.0.0 on Darwin seems to work
> reasonably, but your problem is no doubt bigger.
>
> What compiler/architecture? sounds like a bug to me -- I don't believe
> a compiler is (should be!) allowed to accept a pragma like this and
> then fail to honour it?

I agree, that sounds like a compiler bug. If you accept an alignment clause,
you ought to honor it. (Janus/Ada only accepts alignments of 1, 2 and 4 for
this reason.) That's little help for the OP, however.

It's quite possible that a variable (rather than an allocator) would do the
right thing. (Often there is separate code controlling such things.) That
may not be practical for the OP, either. Someone suggested a user-defined
storage pool, which may be the only recourse.

                               Randy.