Re: [Buildroot] [PATCH] package/collectd: fix build of virt plugin

[Julien Olivain via buildroot <buildroot@buildroot.org>]

On 27/08/2026 22:08, Thomas Petazzoni via buildroot wrote:
> Since the bump of libxml2 from 2.13.8 to 2.15.0 in Buildroot commit
> d81922c1ef8825f10b802984d9721412a1a1a377, the "virt" plugin of
> collectd no longer builds:
> 
> src/virt.c:2208:49: error: expected ';', ',' or ')' before 
> 'ATTRIBUTE_UNUSED'
>  2208 | static void virt_eventloop_timeout_cb(int timer 
> ATTRIBUTE_UNUSED,
>       |                                                 
> ^~~~~~~~~~~~~~~~
> src/virt.c: In function 'register_event_impl':
> src/virt.c:2221:26: error: 'virt_eventloop_timeout_cb' undeclared 
> (first use in this function)
>  2221 |                          virt_eventloop_timeout_cb, NULL, NULL) 
> < 0) {
>       |                          ^~~~~~~~~~~~~~~~~~~~~~~~~
> src/virt.c:2221:26: note: each undeclared identifier is reported only 
> once for each function it appears in
> 
> This is due to the fact that the virt plugin code was incorrectly
> using the ATTRIBUTE_UNUSED define, which was supposed to be an
> internal define of libxml2. But it turns out that up to libxml2 2.14.0
> and its commit 208f27f9641a59863ce1f7d4992df77f7eb0ea9d, this define
> had been made publicly available. It could therefore mistakenly be
> used by collectd's virt plugin... until libxml2 was upgraded.
> 
> We backport an upstream patch from collectd that fixes the issue.
> 
> Fixes:
> 
>   
> https://autobuild.buildroot.net/results/4c8463f0372560f4c3a20b0f67854460f0d1c400/
> 
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

Applied to master, thanks.
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