[Mpi-22] [MPI Forum] #59: Clarification on MPI::FILE_NULL, MPI::WIN_NULL and MPI::COMM_NULL

[William Gropp]

I've viewed this as a source-code requirement - Applications require  
no changes in their source code.  That permits requiring recompilation.

Bill

On Apr 3, 2009, at 1:06 PM, Jeff Squyres wrote:

> This is worth raising to the list.
>
> What is the rule for 2.2 -- that existing MPI applications must be
> able to run with no changes against an MPI-2.2 library?  Or is it that
> existing MPI applications must be able to compile and run with no
> source code changes against an MPI-2.2 implementation?
>
> I hope it's the latter; this change is relatively important.
>
>
>
> On Apr 3, 2009, at 5:56 AM, MPI Forum wrote:
>
>> #59: Clarification on MPI::FILE_NULL, MPI::WIN_NULL and  
>> MPI::COMM_NULL
>> -----------------------------------
>> +----------------------------------------
>> Reporter:  hubertritzdorf          |            Owner:   
>> hubertritzdorf
>>    Type:  Correction to standard  |           Status:  new
>> Priority:  Waiting for reviews     |        Milestone:  2009/04/06
>> Chicago
>> Version:  MPI 2.2                 |       Resolution:
>> Keywords:                          |   Implementation:  Completed
>> -----------------------------------
>> +----------------------------------------
>> Changes (by asupalov):
>>
>> * cc: alexander.supalov_at_[hidden] (added)
>>
>>
>> Comment:
>>
>> Aren't we changing C++ ABI herewith? If so, we may want to postpone
>> this
>> change till MPI-3.
>>
>> --
>> Ticket URL: <https://svn.mpi-forum.org/trac/mpi-forum-web/ticket/ 
>> 59#comment:33
>>>
>> MPI Forum <https://svn.mpi-forum.org/>
>> MPI Forum
>
>
> -- 
> Jeff Squyres
> Cisco Systems
>
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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