rawhide report: 20150210 changes

[Jens Petersen]

> Am 14.02.2015 um 17:02 schrieb Jens Petersen:
> > AFAICT now the ABI changes are due to -40 having
> > been built with make -j16 on i686 and x86_64.
> >
> > In future I will use -j4 or less again
> 
> don't get me wrong but if the number of threads of the complier changes
> ABI of the result the problem is way larger

It is a ghc buildsystem issue not a compiler issue.
But yes it would be good to fix this upstream.