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Type interoperability warnings current issue for intrinsic types when their type, kind, or length do not meet the requirements for C interoperability. This turns out to be too noisy for the case of one-byte characters with lengths other than one when creating C pointers from C_LOC or C_F_POINTER -- it is not uncommon for programs to use pointers to longer character objects. So split the interoperability warning so that the case of a known bad character length for an otherwise interoperable type is controlled by its own UsageWarning enumerator, and leave that usage warning off by default. This will better fit expectations in the default case while still showing a warning under -pedantic.