Build failures with libeigen3-3.4.0

[dbungert]

I spent some time recently looking into build failures of opensurgsim for Ubuntu Jammy (future 22.04).
Sample build log:
https://launchpadlibrarian.net/580379822/buildlog_ubuntu-jammy-amd64.opensurgsim_0.7.0-11build2_BUILDING.txt.gz

Using the source from Git here, I can see similar results. I believe that this change in libeigen is relevant:
Eigen/src/Geometry/Transform.h

• EIGEN_DEVICE_FUNC const LinearMatrixType rotation() const;

• typedef typename internal::conditional<int(Mode)==Isometry,ConstLinearPart,const LinearMatrixType>::type RotationReturnType;
• EIGEN_DEVICE_FUNC RotationReturnType rotation() const;

See also the linked log file from a build of the github master branch, which shows a few other build failures (test related).
https://gist.github.com/dbungert/bd40eebdc225c9ddcaa3b882be059905

[tillea]

I can confirm this issue for the Debian package. It would be great if this could be fixed in the near future.

[HarryDC]

Sorry there really isn't any work being done using OSS at the moment on our side, any change will have to come from the community