Bug#1052144: ghc: Needs to link against libatomic on at least m68k

[John Paul Adrian Glaubitz]

Hello!

On Sat, 2023-10-14 at 16:37 +0200, John Paul Adrian Glaubitz wrote:
> Hi!
> 
> On Sat, 2023-10-14 at 17:33 +0300, Ilias Tsitsimpis wrote:
> > As a side note, I believe the attached patch is wrong, it changes the
> > semantics of the functions. Notice that __sync_val_compare_and_swap()
> > returns the initial value of the variable x, whereas
> > __atomic_compare_exchange() returns true/false, depending on whether the
> > operation succeeded. The correct patch is here [1].
> > 
> > Could this be the reason why your cross-compiler for m68k seg-faults?
> 
> Hmm, good point. I will verify that. Thanks for pointing this out!

Cherry-picked the patches from 9.4.7 to fix the 32-bit unregisterised builds
plus the patch to use modern atomics now but the cross-compiled package still
crashes on m68k:

Setting up ghc (9.4.6-1+ports) ...
qemu: uncaught target signal 11 (Segmentation fault) - core dumped

Adrian

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