icb_parpack_cpp test is failing on ppc64el and others archs

[sylvestre]

https://buildd.debian.org/status/fetch.php?pkg=arpack&arch=ppc64el&ver=3.6.1-1&stamp=1529756139&raw=0

rank 0 - 1000.15 1000.15
Correct eigenvalues not computed
--------------------------------------------------------------------------
MPI_ABORT was invoked on rank 0 in communicator MPI_COMM_WORLD
with errorcode 1.

NOTE: invoking MPI_ABORT causes Open MPI to kill all MPI processes.
You may or may not see output from other processes, depending on
exactly when Open MPI kills them.
--------------------------------------------------------------------------
FAIL icb_parpack_cpp (exit status: 1)

[sylvestre]

@fghoussen Does it ring a bell?
we could just disable mpi on this arch...

[fghoussen]

Not really: soundless bell ! In build dependencies, I see libopenmpi3: could you try with openmpi2 ?

[fghoussen]

If switching from openmpi2 to openmpi3 is OK on ppc64el (?), try it also on armel

[sylvestre]

other archs are indeed failing:
https://buildd.debian.org/status/package.php?p=arpack

[fghoussen]

If libopenmpi3 is not to blame (?), then C++11 could be to blame....

I've just seen in the (armel) log (at the end) :

libtool: link: mpic++ -std=gnu++11 ...
E: Build killed with signal TERM after 150 minutes of inactivity

The build seems to hang. Looks like the compiler goes crazy because he doesn't know what to do with the (hard-coded) gnu++11 ?!... Really not sure (what is the compiler behind ?). I have no good answer here. I PR a few lines: kill them if they don't go the way you like

[10110111]

Looks more like a test hanging than the compiler disliking gnu++11. The compiler seems to have finished by the time the timeout message is printed.

[fghoussen]

Yeah maybe. Can you have more verbose logs ? Or compile with make VERBOSE=1 ?

[10110111]

I guess not. But from the log it seems that the first test in the MPI directory hangs. I suppose only adding some prints to the test would help debugging.

[dbeurle]

I'm not entirely sure about this, but in the CMake it links against the CXX and the C libraries for MPI. Is this likely a problem?

Other possibility is a dead lock :/

[fghoussen]

Just realized hang is after issue46 test... Which is not an icb one ?! No idea what's going on

[fghoussen]

@sylvestre: I guess the problem on armel/ppc64 may be fixed by 9742da7 !....

[fghoussen]

@sylvestre : if you're about to publish a new release, ckeckout if this issue is (should be !) fixed

[fghoussen]

May be fixed by f36eb6c

[fghoussen]

May be fixed by f36eb6c

@sylvestre: if #397 is released would be good to check if this problem is solved

[sylvestre]

yeah, i will upload it once 3.9.1 is tagged :)