scivision

That inline code comment is incorrect, I think I made that code comment but later realized it's not true. MPI system configurations that should ultimately work "TODO" for Meson include:...

@acroucher if you have time, please consider seeing if #7373 also fixes MPICH. Thanks!

Reference https://support.google.com/youtube/answer/10349430?sjid=14442773961177191547-NA

Note that Octave package [datatypes](https://github.com/pr0m1th3as/datatypes/) includes a "string" class, in case it's ultimately considered to use that package.

This might be an FPM bug itself, this is the current way one is supposed to specify dependencies in a platform-independent way.

yes

Is this a summary of functionality this PR adds? * I have a "large" project with lots of tests that only devs, not end-users that may build this project are...

This PR should be rebased on `develop` p4est branch to make the CI pass

Finding MPI is quite a task. For reference: * CMake [FindMPI.cmake](https://github.com/Kitware/CMake/blob/master/Modules/FindMPI.cmake) seems to just work * another attempt at [FindMPI.cmake](https://github.com/geospace-code/h5fortran-mpi/blob/main/cmake/Modules/FindMPI.cmake)

GitHub updates the runners I think weekly or so. Usually this doesn't break anything, but a couple times a year it does. Also when Apple updates XCode a few times...