[HEADSUP] Atlas changed libraries

Matthew Miller mattdm at fedoraproject.org
Sun Sep 22 23:38:20 UTC 2013

On Sun, Sep 22, 2013 at 08:27:52PM +0100, Richard W.M. Jones wrote:
> > However, ATLAS still has different flavors for different CPUs (e.g.
> > 3dnow, sse, sse2, sse3 etc). I'm not sure if this can be easily handled
> > with alternatives.
> Please don't [to ATLAS upstream, not Susi] do this.  It breaks all
> sorts of scenarios, especially virtual machine migration or simply
> moving hard disks from one physical machine to another.
> Arrange your code so it chooses the best available routines when the
> program starts up, and compile every feasible alternative into the
> binary.  Or use kernel vdso/user-helper functions when that is
> applicable.

Actually, what ATLAS upstream intends is for the program to be recompiled on
every installation (or boot, even). I think we used to have packages that
did that; this is a compromise.

Matthew Miller  ☁☁☁  Fedora Cloud Architect  ☁☁☁  <mattdm at fedoraproject.org>

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