Comment (by Roland Haas):

The pull request in https://bitbucket.org/cactuscode/cactus/pull-requests/97/cactus-declare-cctk_pointerto-as now lets me compile (and use) CCTK_PointerTo on both QB2 (as a standin for a system with an older Intel compiler) and gfortran-10.

This does not yet let me compile or run the full toolkit to to similar issues like the CCTK_Reduce like functions one and, once that one is fixed in TestReduce and EHFinde issues in EOS_Omni and GRHydro. I will open separate tickets for them. As far as I can tell these will require fixes to Cactus using code and cannot be made to work by changes only to the flesh (since it affects subroutines rather than functions and Fortran does not require any interface like section for subroutines so the flesh has no way to hook in any possible solution to user code).

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2403/compile-failure-with-gfortran-10-when