[Bug fortran/41897] Support TR 29113: "Further Interoperability of Fortran with C"

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=41897
Bug 41897 depends on bug 48820, which changed state.

Bug 48820 Summary: TR 29113: Implement parts needed for MPI 3
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=48820

           What    |Removed                     |Added
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             Status|WAITING                     |RESOLVED
         Resolution|---                         |FIXED