[Patch] Fortran/OpenMP: Warn when mapping polymorphic variables

GCC does not really handle mapping of polymorphic variables - and OpenMP 6 will also make it implementation defined. (While explicitly permitting it with data-sharing clauses.) This matches essentially what is in GCC, except that 'private' (and other privatizations) are not properly handled.

[Patch] (was: [Patch] Fortran/OpenMP: Fix __builtin_omp_is_initial_device)

Sometimes waiting a bit leads to better code … Tobias Burnus wrote: ... [I guess, we eventually want to add support for more builtins. For instance, acc_on_device would be a candidate, but I could imagine some additional builtins.] I have now implemented acc_on_device and I think the new fix

[Patch] Fortran: Use OpenACC's acc_on_device builtin, fix OpenMP' __builtin_is_initial_device (was: [Patch] (was: [Patch] Fortran/OpenMP: Fix __builtin_omp_is_initial_device))

I forgot to update the subject line. To make it easier to find (patch archeology), now with proper subject line … Tobias Burnus wrote: Sometimes waiting a bit leads to better code … Tobias Burnus wrote: ... [I guess, we eventually want to add support for more builtins. For instance, acc_on_d