I would be cautious with boost upgrade in stable branch.

Boost is known for having breaking changes almost each new version. I 
only had a glance at 1.79-1.81 https://www.boost.org/users/history/ and 
there are a couple of them.

Are you affected by some particular bug or vulnerability in 1.78?

Vyacheslav

On 21.07.2023 06:49, Thomas Roos via lists.openembedded.org wrote:
>
> Hi,
> we are hitting an issue with boost version 1.78 and like to ask if and 
> how there is a boost upgrade on kirkstone branch?
> Cheers, Thomas
>
>
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