Proposal: provide cas and barriers symbols even without -threaded

[Simon Marlow]

On 20/07/13 07:28, Ryan Newton wrote:
> Hi Simon,
>
> That sounds like a good solution and I'll attempt a patch.  I think the
> fix is only three lines.  That is, replace these three lines with
> EXTERN_INLINE C functions:
>
> #define write_barrier()      /* nothing */
> #define store_load_barrier() /* nothing */
> #define load_load_barrier()  /* nothing */

I think that should do it, yes.

> That would fix the -threaded/unthreaded disparity.  But I still don't
> see how to access this stuff properly from foreign-primops in a library
> such that GHCI doesn't barf when trying to load the library....

If you're referring to the problem with the missing 
stg_MUT_VAR_CLEAN_info symbol, I'll push a fix for that soon.  Or is 
there something else?

Cheers,
	Simon