Problems with TBB 2021 Versions

[noahares]

The releases of TBB from 2021 no longer contain some headers we use:

• tbb_stddef.h which is read to determine the interface version with CMake. This information was moved to https://github.com/oneapi-src/oneTBB/blob/master/include/oneapi/tbb/version.h
• task_scheduler_init.h became deprecated in favor of this (?) https://github.com/oneapi-src/oneTBB/blob/master/include/oneapi/tbb/global_control.h

For now the Ubuntu Repos all provide the 2020 Versions of TBB, but rolling release distros already use the 2021 version, which Ubuntu will eventually use, too.

[larsgottesbueren]

Tim just sent me a link to a script that is supposed to work with the new version. I haven't taken a look yet. CMake is truly awful.
https://github.com/ceres-solver/ceres-solver/blob/master/cmake/FindTBB.cmake