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List:       gcc-fortran
Subject:    Re: How to force 16-byte alignment with gfortran?
From:       Timo Schneider <timo.schneider () s2004 ! tu-chemnitz ! de>
Date:       2007-05-30 7:33:22
Message-ID: 20070530073322.GA10777 () dopey ! perlplexity ! org
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On Wed, May 30, 2007 at 01:39:22AM +0200, FX Coudert wrote:
> [cross-posting to gcc-help, we may have other ideas and opinions there]
> 
> >Is there a way to tell gfortran to allign all variables and  
> >datastructures
> >(like arrays) at 16-byte boundaries? Not only the static ones but even
> >if I do an ALLOCATE(A(N,M)) I want the start of the array to be on an
> >adress whichs last 4 bits are "0000"?
> 
> gfortran translates ALLOCATE calls using malloc(), so if your system  
> malloc() returns correctly aligned memory, it should work out-of-the- 
> box. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24261 for some  
> discussion about this.

Ok, thanks. But what's about statically declared variables? How can I
influence their alignment?

Regards,
Timo

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