[Mpi-forum] Compile-time check for MPI_Init or MPI_Init thread

[William Gropp]

No, but either autoconf or the kind of test strategy that it uses (can  
I link a program with the routine) is relatively easy to implement  
when creating the application build environment (and note that these  
tests work in a cross-compilation environment).

Bill

On Jan 20, 2010, at 3:49 PM, Kendall, Ricky A. wrote:

> But does the standard say you need to have autoconf available to use  
> MPI?
> This is a good solution but has issues.
>
> Ricky A. Kendall
> Group Leader, Scientific Computing
> Oak Ridge Leadership Computing Facility (OLCF)
> Oak Ridge National Laboratory
> Phone: (865) 576-6905
> Cell: (865) 356-3461
> Email:  kendallra _at_ ornl.gov
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> Gmail: rickyk
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>
> -----Original Message-----
> From: mpi-forum-bounces at lists.mpi-forum.org [mailto:mpi-forum-bounces at lists.mpi-forum.org 
> ] On Behalf Of William Gropp
> Sent: Wednesday, January 20, 2010 11:18 AM
> To: Main MPI Forum mailing list
> Cc: Markus Geimer
> Subject: Re: [Mpi-forum] Compile-time check for MPI_Init or MPI_Init  
> thread
>
> In this exact situation (building tests for any MPI implementation,
> including tests of thread safety, I use the autoconf macros to check
> for the functions that I need.
>
> Bill
>
> On Jan 20, 2010, at 3:15 AM, Marc-Andre Hermanns wrote:
>
>> Hi all,
>>
>> we are currently puzzled about how to check whether to call MPI_Init
>> or
>> MPI_Init_thread in one of our programs.
>>
>> Our performance analyzer scout can be built in different versions:
>> MPI,
>> OpenMP, and hybrid MPI/OpenMP. As the code-base is shared, we have
>> #define statements to separate individual portions of the code. To
>> decide whether to call MPI_Init or MPI_Init_thread at compile time we
>> check the #define set by MPI. However, POE on our Power6 Cluster
>> correctly reports MPI 1, as it does not support spawning and is
>> therefore not MPI 2 compliant, yet MPI_Init_thread would be  
>> available,
>> and must be used for the hybrid version.
>>
>> My initial idea is to take 'nm' at configure-time of our tool. Check
>> whether MPI_Init_thread is in the library, and set my own #define.
>>
>> Is there a more elegant solution? How are users supposed to portably
>> detect it?
>>
>> Is it something we can/should fix?
>>
>> Best regards,
>> Marc-Andre
>> -- 
>> Marc-Andre Hermanns
>> Juelich Supercomputing Centre
>> Institute for Advanced Simulation
>> Forschungszentrum Juelich GmbH
>> D-52425 Juelich
>> Germany
>>
>> Phone : +49-2461-61-2054
>> Fax   : +49-2461-61-6656
>> eMail : m.a.hermanns at fz-juelich.de
>> WWW   : http://www.fz-juelich.de/jsc/
>>
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>>
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>
> William Gropp
> Deputy Director for Research
> Institute for Advanced Computing Applications and Technologies
> Paul and Cynthia Saylor Professor of Computer Science
> University of Illinois Urbana-Champaign
>
>
>
>
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William Gropp
Deputy Director for Research
Institute for Advanced Computing Applications and Technologies
Paul and Cynthia Saylor Professor of Computer Science
University of Illinois Urbana-Champaign