Bug#1060849: mesa: FTBFS on armel: static assertion failed: "vn_ring_shared requires lock-free 32-bit atomic_uint"

[Julien Cristau <jcristau@debian.org>]

On Tue, Jan 16, 2024 at 11:02:25 +0100, Julien Cristau wrote:

> On Mon, Jan 15, 2024 at 16:14:17 +0000, Simon McVittie wrote:
> 
> > The armel baseline does not have lock-free atomic operation opcodes. The
> > result is a build failure:
> > 
> > https://buildd.debian.org/status/fetch.php?pkg=mesa&arch=armel&ver=23.3.3-1&stamp=1705055313&raw=0
> > > In file included from ../src/util/u_math.h:43,
> > >                  from ../src/virtio/vulkan/vn_common.h:35,
> > >                  from ../src/virtio/vulkan/vn_buffer.h:14,
> > >                  from ../src/virtio/vulkan/vn_buffer.c:11:
> > > ../src/virtio/vulkan/vn_ring.h:40:1: error: static assertion failed: "vn_ring_shared requires lock-free 32-bit atomic_uint"
> > >    40 | static_assert(ATOMIC_INT_LOCK_FREE == 2 && sizeof(atomic_uint) == 4,
> > 
> > Could this perhaps be solved by disabling the virtio driver on armel?
> > 
> Looks like that already happened in
> https://salsa.debian.org/xorg-team/lib/mesa/-/commit/71deba800f28059724dd7899b8901e86c0eb2365
> a few months ago, looks like it regressed.
> 
Right,
https://salsa.debian.org/xorg-team/lib/mesa/-/commit/9e99f52bf2c9c8f2993cc2a6bec1e13b70fd10b8
seems to have dropped the armel special-case there.

Cheers,
Julien