[systemd-devel] udev-212 and up on Sparc v8

[Samuli Suominen]

On 23/06/14 15:30, Lennart Poettering wrote:
> On Sat, 21.06.14 09:05, Chase Rayfield (cusbrar2 at yahoo.com) wrote:
>
>>> If I interpret that correctly, systemd would need to define
>>> _sync_sub_and_fetch_4 when building for 32-bit processors which do not
>>> support the __sync_sub_and_fetch operation natively.
>> Yes exactly... I think libatomic_ops can help with that and I have
>> built it from git on Sparc v8 (This flag is required 
>> -DAO_NO_SPARC_V9). But I am not sure how to implement
>> __sync_sub_and_fetch with it. Details on getting it to build here:
>> https://github.com/ivmai/libatomic_ops/issues/9
>>
>> I can give a systemd developer access to a box to fix this on if someone 
>> wants to give it a shot. I believe the reason GCC doesn't provide an 
>> implementation there are some pretty huge trade offs to be made with 
>> either performance or functionality.
> Thanks, but please work with the gcc developers to solve this
> generically for all gcc users, instead of work around this limitation in
> every individual project independently. It's certainly time much better
> spent.
>
> Thanks,
>
> Lennart
>

IIRC, he told me when we discussed at IRC that systemd-udevd was the
showstopper, and rest of the 'core' system
built fine.
Mike seems to also think this should be solved in systemd,
http://bugs.gentoo.org/show_bug.cgi?id=514016#c9

But, too bad this goes beyond my knowledge a bit :-/

:/

Thanks,
Samuli