[Pkg-openmpi-maintainers] Bug#450518: Bug#450518: mpicc not found

[Ondrej Certik]

Hi Dirk and Manuel,

> Thanks for taking the time to report a bug.

Thanks for a quick reply.

> | $ wajig install libopenmpi-dev
>
> At this point, did you have other MPI packages like LAM or MPICH installed?

Nothing. I purged everything. I installed openmpi. I purged openmpi
and checked again everything is purged, installed openmpi. Then
did the same procedure on 3 different computers (i386 and amd64). Only
then filled a bugreport, after observing the exact same behavior on
all of them.

Note: I had mpich and lam installed before, but I purged them.

> This *does* install mpicc.openmpi and friends.
>
> Did you by chance ever alter the handling of alternatives in
> /etc/alternatives?

Not manually, but some package has screwed it up, see below.

> Yes, but it is supposed to be done automatically, and it generally works. I
> presonally have only experienced problems when I had previously intervened
> manually (while testing etc).
>
> Could you possibly purge the Open MPI packages as well as other MPI packages,
> and re-start from a clean slate?

I did that already before filling this bugreport.

> The packages are generally in decent shape and you should not have this
> problem. It is worth seeing if we overlooked something.
>

I tried "pbuilder --login" and tried the procedure above and it
works.... So something is wrong on all my Debian systems.

$ wajig remove libopenmpi1
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be REMOVED:
  libopenmpi-dev libopenmpi1 openmpi-bin
0 upgraded, 0 newly installed, 3 to remove and 1 not upgraded.
Need to get 0B of archives.
After unpacking 7422kB disk space will be freed.
Do you want to continue [Y/n]?
(Reading database ... 149065 files and directories currently installed.)
Removing libopenmpi-dev ...
Use of uninitialized value in string eq at
/usr/sbin/update-alternatives line 432.
Removing openmpi-bin ...
Removing libopenmpi1 ...



Notice the problem in update-alternatives. I again tried to install
libopenmpi-dev and it again doesn't work.

I tried installing, removing and installing again in pbuilder - it works. Hm.

Something is wrong with update-alternatives - probably screwed up by
mpich, or lam packages. Any ideas?

Ondrej