[Pkg-openmpi-maintainers] Bug#545919: Bug#545919: openmpi: Please add support for BLCR

[Alan Woodland]

2009/9/12 Alan Woodland <alan.woodland at gmail.com>:
> 2009/9/10 Alan Woodland <awoodland at debian.org>:
>> 2009/9/10 Manuel Prinz <manuel at debian.org>:
>>> Hi Alan!
>>>
>>> Am Donnerstag, den 10.09.2009, 00:33 +0100 schrieb Alan Woodland:
>>>> BLCR is now in main. It would be nice if openmpi were built using this
>>>> where it is available.
>>>>
>>>> I've attached a short patch adding options to configure, and build-depends
>>>
>>> Thanks a lot for the patch!
>>>
>>> I did think about adding it but BLCR was not packaged yet. I will add it
>>> in the next upload.
>>>
>>> Unfortunately, I do not have any possibility to test Open MPI with BLCR
>>> at the moment. Can you confirm it works as expected?
>>
>> I checked it configured and built last night on my machine, but I've
>> not had a chance to test any functionality properly yet.
>
> Ok, I've had a bit more of a fiddle with it now. Several things have come up :)
>
> Firstly a dependency on libcr0 is now generated automatically for
> libopenmpi1.3, which is technically accurate, but not really strictly
> needed. If libcr0 isn't installed mpirun still works exactly as before
> anyway. The only time you notice that libcr0 isn't installed is when
> you pass the "-am ft-enable-cr" flag to mpirun which causes it to try
> and dlopen() the library that is really linked against libcr0.
Forgot to say: Even when it can't dlopen() this because of the
unresolved external dependency it still behaves sanely, warns about
not being able to do the checkpoint and continues.

Alan