Hi Alastair,
On Sat, Feb 03, 2024 at 08:11:21AM +0000, Alastair McKinstry wrote:
Since the time transition is going to require an openmpi transition, I
suggest that the mpi-defaults transition happen simultaneously;
ie mpi-defaults to move 32-bit builds to mpich; openmpi 4.1.6-6 with t64
libs builds against 64-bit libs only.
If I'm interpreting your message correctly, I believe these are relatively
orthogonal: you can change mpi-defaults whenever you wish, the packages that
depend on libopenmpi3 would still need binNMUing to make them depend on
libopenmpi3t64 on armhf. If you arrange it so that at the same time
mpi-defaults changes, so that any armhf packages build-depending on
mpi-default-dev get rebuilt to depend on libmpich12 instead of either
libopermpi3 or libopenmpi3t64, that's fine and would save a round of binNMUs
of those same packages later; but that is not a transition that is going to
require the same degree of tight coordination wrt unstable uploads and
testing migration so I don't think we should block the t64 unstable uploads
on an mpi-defaults change.
(If you upload mpi-defaults to unstable *first* and get the binNMUs done
before the t64 transition lands, that's great and just saves us on the
number of binNMUs we will need to schedule.)