[openib-general] 32-bit build for ppc64 is required

[Roland Dreier]

 > Usually this should work, but I don't rely on that since we also support
 > s390/s390x (although not with Infiniband, but the OpenMPI alternative
 > that we shipped with RHEL4, lam, gets compiled on s390/s390x) and that
 > pair is a bit of an odd mix and I don't have one setting here at my
 > house where I work, so it's hard for me to confirm that just leaving
 > things to happen by default works as anticipated.  If they would ever
 > make an s390 that uses less than a gigawatt of power and heats less than
 > a large sized convention center, that could change... ;-)

http://www.conmicro.cx/hercules/