[Mpi3-tools] Agenda for next TelCon, Monday 2/21

Marc-André Hermanns m.a.hermanns at grs-sim.de
Mon Feb 21 11:13:38 CST 2011

Hi all,

On 19.02.2011, at 02:30, Martin Schulz wrote:

> - Naming: people wanted us to move into the MPI namespace
> 	- Which prefix should we use?
> 	- How do we distinguish the semantics?

Following the Wikipedia entry to C99 I looked up the
PDF document of the C standard, and there on page 20 on the
bottom (section it states:


"The implementation shall be able to translate and execute at least 
one program that contains at least one instance of every one of the 
following limits 
- 31 significant initial characters in an external identifier (each  
  universal character name specifying a short identifier of 0000FFFF or  
  less is considered 6 characters, each universal character name 
  specifying a short identifier of 00010000 or more is considered 10 
  characters, and each extended source character is considered the same 
  number of characters as the corresponding universal character name, if 

Aside from comment in parentheses, which I admit I don't understand,
I think it says that to guarantee compiler support, we have to stick
to the 30/31 character limit already stated in the MPI 2.2 standard,


PS: I also checked the draft of C1x with the same results, so I guess
they don't plan to change it.
Marc-Andre Hermanns
German Research School for
Simulation Sciences GmbH
c/o Laboratory for Parallel Programming
52056 Aachen | Germany

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