2014-03-06 15:53 GMT+04:00 Bernd Schmidt <ber...@codesourcery.com>:
> No. I don't think we need a global constructor for registering
> __OPENMP_TARGET_HOST__ - this would unnecessarily bloat crtbegin/crtend. We
> also shouldn't need to have the target tables known outside of the image
> constructed by the mkoffload tools. The way I imagine it, every mkoffload
> tool creates its own constructor that looks like something like this:
>
>
> __attribute__ ((constructor)) static void
> init (void)
> {
> GOMP_offload_register_target (__OPENMP_TARGET_HOST__,
> PTX_ID, ptx_target_table);
> }
>
> That creates a mapping between host and target table for PTX_ID. If there
> are multiple shared libraries with offload support, you can still obtain the
> ordering you want from these GOMP_offload_register_target calls. Everything
> is nicely private to the mkoffload-generated image.
>
> It's implemented in almost this fashion (slightly different naming and args,
> and no real support in libgomp) in the patch kit I sent.
OK, now I get it, this looks good. I will rewrite the patch for
libgomp posted above to support this scheme.
Since we will pass __OPENMP_HOST_TABLE__ to GOMP_offload_register,
there is no need to pass it to GOMP_target[data/update], right?
-- Ilya
