Bug#833425: Aw: mpi-defaults: switch to openmpi on hppa architecture

[Helge Deller]

Some more details regarding the request to switch mpi-defaults to openmpi on hppa:

When building boost-1.6.1 I [1] get:
/usr/include/mpich/mpicxx.h:21:4: error: #error 'Please use the same version of GCC and g++ for compiling MPICH and user MPI programs'
 #  error 'Please use the same version of GCC and g++ for compiling MPICH and user MPI programs'

Currently Doko announced to switch to gcc-6 and update to boost-1.6.1 [2], so currently it's urgent to get it fixed for hppa.

Thanks,
Helge

[1] https://buildd.debian.org/status/fetch.php?pkg=boost1.61&arch=hppa&ver=1.61.0%2Bdfsg-2.1&stamp=1470277857
[2] http://lists.alioth.debian.org/pipermail/debian-ports-devel/Week-of-Mon-20160801/000202.html