OpenACC support in 4.9

[Tobias Burnus]

Evgeny Gavrin wrote:
> What do you think about support of OpenACC 1.0
> (http://www.openacc-standard.org/) in gcc?

I like the idea - though, I wonder whether OpenMP 4.0's "target"* would 
be the better choice as it looks a bit more flexible and better defined. 
(Conceptually, they are very similar; I think the 
middle-end/back-end/library part would even be the same.)

Which accelerators do you intent to handle? "Accelerator" is a rather 
broad term, covering DSPs, GPUs, Intel's MIC, ...

Tobias

* http://openmp.org/wp/2013/03/openmp-40-rc2/  (GCC supports OpenMP 3.1. 
Support for OpenMP 4.0 is currently implemented in GCC's gomp-4_0-branch 
- but I don't think anyone will work on OpenMP 4.0's 'target' feature 
soon as the enough work on the non-'target' features remains.)

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