Hey, The package in Focal for the linear algebra package Eigen is already at its newest version, 3.3.7:
https://packages.ubuntu.com/focal/libeigen3-dev My concern is that this version was released in 2018 and does not include a fix for the deprecated-copy warning that's now on by default in GCC9. Upstream has addressed it in their codebase: https://gitlab.com/libeigen/eigen/issues/1788 https://gitlab.com/libeigen/eigen/-/merge_requests/29/diffs But based on the discussion/tags, this patch will not ship until Eigen 3.4.0, so will likely never make it to Focal. Would it be reasonable to patch this change onto the current 3.3.7 version to avoid dependent packages turning off warnings or doing other workarounds? Thanks, Mike
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