Heiko Bauke

@VictorEijkhout I am not following the discussion in detail. Thanks, for drawing my attention to these newer developments. Apparently, there are "a few" new MPI functions on the way.

@VictorEijkhout: There is an `info` class in MPL since some time, see https://github.com/rabauke/mpl/blob/master/mpl/info.hpp Furthermore, the `communicator` class has two `info`methods for setting and getting an info object. Various, communicator creation...

I understand the error message in the way that the compiler does not recognize the `[[maybe_unused]]` attribute, which is a C++17 feature. GCC is C++17 feature complete since version 8....

Thanks for your suggestion. TRNG uses Catch2 version 2.x, which is a pure header-only library. I see no benefit over using a system-installed version. Using a system-installed version just raises...

Thanks, looks good to me.