Disregard this -- I forgot (and read the configure output wrong) that hwloc 
will *not* do #2 (i.e., link against libpci) unless you specifically request it 
via --enable-libpci.

I'm assuming that we do *not* want to enable that by default (i.e., so that the 
compiled OMPI installation does not accidentally become GPL tainted).



On Mar 18, 2013, at 1:57 PM, "Jeff Squyres (jsquyres)" <jsquy...@cisco.com>
 wrote:

> (*** Sam: please add this to the agenda for tomorrow; thanks ***)
> 
> If you recall, we recently discovered that hwloc was linking against libpci, 
> which is GPL (not LGPL).  This introduced GPL taint into hwloc, and therefore 
> into Open MPI.  ** Note that we didn't have any released versions of Open MPI 
> that exhibited this behavior, so we're ok.
> 
> New versions of hwloc (e.g., v1.5.2) have been released with support for 
> libpciaccess -- a BSD library that provides the PCI stuff that hwloc needs.  
> However, hwloc still also provides support for libpci, too.  Right now, 
> hwloc's configury does something like this:
> 
> 1. if libpciaccess is found, use it
> 2. if libpciaccess is not found, if libpci is found use it
> 3. if neither are found, disable PCI support
> 
> Do we want to allow #2?  (by default, at least)
> 
> I ask because I don't know if various distros still have libpci installed by 
> default, not libpciaccess (e.g., my RHEL6 installs seem to be configured this 
> way).  Because if they do, then OMPI compiled on those systems will be GPL 
> tainted -- and the user may not know.  In many cases, this may not matter, 
> but this could be a big deal for ISVs or other OMPI-binary distributors.
> 
> -- 
> Jeff Squyres
> jsquy...@cisco.com
> For corporate legal information go to: 
> http://www.cisco.com/web/about/doing_business/legal/cri/
> 
> 
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-- 
Jeff Squyres
jsquy...@cisco.com
For corporate legal information go to: 
http://www.cisco.com/web/about/doing_business/legal/cri/


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