Atlas compilation

[Brooks Davis]

On Wed, Oct 13, 2004 at 11:55:52AM -0700, Kris Kennaway wrote:
> 
> On Wed, Oct 13, 2004 at 10:21:39AM -0700, Brooks Davis wrote:
> > On Wed, Oct 13, 2004 at 09:54:09AM -0700, Kris Kennaway wrote:
> > > On Wed, Oct 13, 2004 at 07:38:44AM -0700, Brooks Davis wrote:
> > > > On Tue, Oct 12, 2004 at 08:48:56AM -0700, Kris Kennaway wrote:
> > > > > On Mon, Oct 11, 2004 at 03:05:20PM +0200, Toyotoshy wrote:
> > > > > > Hallo evrybody,
> > > > > > I'm just a newbie and I'm trying to compile /usr/ports/math/atlas
> > > > > > Compilation started 6 hours ago and:
> > > > > > 
> > > > > > du /usr/ports/math/atlas
> > > > > > ....
> > > > > > 360160  /usr/ports/math/atlas
> > > > > > 
> > > > > > isn't it a bit too much time and space?
> > > > > 
> > > > > No, it's an enormous port.  Depending on how slow your machine is, it
> > > > > may take days to build, or it could be as little as 24 hours.
> > > > 
> > > > Yes, not only does it do a lot of things, but since it is
> > > > Automatically Tuned Linear Algebra Software, it actually compiles
> > > > several versions of each function and runs microbenchmarks on them to
> > > > determine which one to use.  Ideally, you should build it when the
> > > > system is nearly idle to avoid perturbing the results.
> > > 
> > > Hmm, that probably means the package is useless, right?
> > 
> > Not entirely given the build time, but certainly if you want to use it
> > seriously, the package isn't all that useful.
> 
> *grumble* The build time is what annoys me too since it's longer than
> the build time for the entire rest of the package collection (modulo
> openoffice) :)

Looking at the port, it looks like there might be some sense in
splitting it in to seperate ports since it builds four versions of each
library (threaded/nonthreaded + pic/nonpic).  It might be intresting to
do that and see how much time the individual versions take.

-- Brooks

-- 
Any statement of the form "X is the one, true Y" is FALSE.
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