(j3.2006) (SC22WG5.5290) Las Vegas minutes

[Tobias Burnus]

Dear All,

John Reid wrote:
> Here are draft minutes of the meeting last week. Comments, please.
>
> MPI: Bill Long
>       There was progress in updating interfacing from Fortran 95 to
>       Fortran 2008.  In particular there was progress on modules.  It
>       had been agreed to drop Fortran 77 support.

[Pedantically, it is actually Fortran 2008 + TS29113 as MPI 3 also uses 
type(*), dimension(..); granted, the dimension(..) part is optional and 
the MPI spec often talks about Fortran 2008 when it means both.]

> OpenMP: Bill Long
>       OpenMP 4.10 would be out in April 2015.

Others remarked to this:

>> "The OpenMP 4.0 standard will be fully supported in gfortran 4.10, due for April 2015."
> Actually, they have move the schedule up and OpenMP 4.0 is supported 
> in gfortran 4.9.1. Due out "real soon now". 

The GCC 4.9 branch now also support OpenMP for Fortran, thus it will be 
in GCC 4.9.1. Regarding the release, on Wed Jun 25 2014, the release 
manager wrote: "I was thinking about doing the RC a week before Cauldron 
or so and the release right before Cauldron". The mentioned GNU Tools 
Cauldron is 18 to 20 June in Cambridge.

Currently missing are possibly the following items waiting feedback from 
the OpenMP committee: "calls to contained functions from target regions, 
copyprivate with array associate-name, pointer vars in reduction clauses 
etc."
Also missing is the support for actually offloading to an accelerator; 
currently, target sections are always run on the host. Support for Xeon 
Phi, PTX and for the GPU run-time lib via OpenCL is currently developed; 
thus, in that sense, only GCC 4.10 will have the full support as GCC 
4.9.1 doesn't do offloading. And a final side note: The offloading will 
also be supported using OpenACC 2.0 besides using OpenMP 4.0.

Tobias
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