I don't have time to do the tests right now, but looking at the build log it maybe related to DSO linking, which I'm not sure whether it has been done correctly on Debian. If you have time could you test if it fails when forcing DSO linking on Debian? There are quite a few upstream build system changes in 2.9.0 and it could be newly introduced a bug as well.
Hi Daniel,
I don't have time to do the tests right now, but looking at the build log it maybe related to DSO linking, which I'm not sure whether it has been done correctly on Debian. If you have time could you test if it fails when forcing DSO linking on Debian? There are quite a few upstream build system changes in 2.9.0 and it could be newly introduced a bug as well.