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Subject: Re: [OMPI users] compiler upgrades require openmpi rebuild?
From: Reuti (reuti_at_[hidden])
Date: 2010-09-03 14:15:42


Hi,

Am 03.09.2010 um 19:51 schrieb Jeff Squyres:

> On Aug 30, 2010, at 6:48 PM, David Turner wrote:
>
>> We have recently upgraded our default compiler suite from
>> PGI 10.5 to PGI 10.8. We use the "module" system to manage
>> third-party software. The module for PGI sets PATH and
>> LD_LIBRARY_PATH.
>>
>> Using Open MPI 1.4.2, built with PGI 10.5, I have verified
>> that changing PATH is sufficient for the Open MPI compiler
>> wrappers to pick up version 10.8 of the PGI compilers.
>> However, it appears that the 10.5 PGI libraries are "wired"
>> into the wrappers somehow. So I get an executable that
>> has been compiled with PGI 10.8 but linked against PGI 10.5
>> libraries.
>>
>> Short of rebuilding Open MPI with PGI 10.8, is there any
>> (safe, reliable) way to get the compiler wrappers to link
>> against the PGI 10.8 libraries? Thanks!
>
> Sorry for the latency in reply.
>
> I would guess that the Open MPI libraries have been linked against the PGI 10.5 libraries, and it might not be easy to dis-entangle them. It *might* be a simple as changing your LD_LIBRARY_PATH, but it might not.

what's inside the binaries (like mpirun) can be checked with:

$ readelf -a mpirun
...
 0x000000000000000f (RPATH) Library rpath: [/opt/pgi/linux86-64/9.0-4/lib]
 0x000000000000001d (RUNPATH) Library runpath: [/opt/pgi/linux86-64/9.0-4/lib]

This can even be changed by:

$ chrpatch -r ... mpirun

-- Reuti

>
> Since there's some question as to how to do it properly, it's probably safest / easiest / least total time spent to just build another copy of OMPI against 10.8. :-\
>
> --
> Jeff Squyres
> jsquyres_at_[hidden]
> For corporate legal information go to:
> http://www.cisco.com/web/about/doing_business/legal/cri/
>
>
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