Re: [Mesa3d-dev] Current tinderbox regression (swrastg_dri, sparc64)

[Matt T. <mat...@gm...>]

On Sun, Mar 28, 2010 at 3:07 PM, Luca Barbieri <luc...@gm...> wrote:
> On Sun, Mar 28, 2010 at 7:36 PM, Chris Ball <cj...@la...> wrote:
>> Hi,
>>
>>   > http://tinderbox.x.org/builds/2010-03-25-0018/logs/libGL/#build
>>   >
>>   > swrastg_dri.so.tmp: undefined reference to `__sync_sub_and_fetch_4'
>>   > swrastg_dri.so.tmp: undefined reference to `__sync_add_and_fetch_4'
>>
>> This regression is still present -- could we get a fix or a revert?
>
> I believe the problem is that sparc does not support atomic operations
> in the basic architecture: I think someone who knows about sparc and
> has such a machine should look into it.
>
> If you don't know anything about sparc, try rebuilding with the
> highest possible sparc -march= level and if that fixes the problem,
> perform a binary search to find the minimum one, and then report the
> results.
>
> If it does not solve the problem, see if anything in /lib or /usr/lib
> exports those symbols.
>
> Also maybe check whether the built swrastg_dri or xlib softpipe
> actually works there.

I think we need to be specifying something like -mcpu=v9 or something
to be able to use the __sync_* primitives. I highly doubt anyone wants
to run any of this code on something older.

I've CC'd Dave Miller--he'll know what to do.

Thanks,
Matt