Jan Stephan

@SimeonEhrig Do you know whether this is still a problem?

> Sounds good. I don't think we need to support add_subdirectory anymore since we have make install. Some projects (PIConGPU, cupla) use alpaka in this way I believe. CC @psychocoderHPC

> btw: If we remove boost in alpaka we need to handle all the boost workarounds in our user code Couldn't we do compiler detection in CMake? Or are there...

Don't merge this just yet. We are waiting for @tonydp03 trying out the Fiber back-end with the CMS software.

Since this will likely be the next step of the efforts in #919: Which headers would we want to precompile? All of them? A subset? User's choice (= precompile individual...

No idea, we have to investigate this first. If it is possible I see no reason against this.

alpaka now enforces that kernel arguments are trivially copyable. So option 3 is what we went for. I don't think the documentation has been updated accordingly, though.

> as soon as we can migrate to a CMake version >= 3.21. This will probably happen once Ubuntu 22.04, the next LTS version, is released.

We would like to implement this for alpaka 0.7.0. Due to time constraints this is marked as an OPTIONAL feature for the next release.

Okay, it looks like the above code portion isn't necessarily the culprit. Adding `std::cout