Hi Steve,
OK. Thanks for taking on this task.
Committed (r274902). Thanks for the review!
As to the open question about how to handle this check, I would create -fallow-argument-mismatch (or whatever option name you like). gfortran issues an error if a mismatch is detected. -fallow-... would reduce the error to warning, which can only be silenced with -w. Hopefully, this will encourage users to fix the code.
Yes, that is what I will submit next. -fallow-argument-mismatch sounds like a good name, unless somebody else comes up with a better name. Regards Thomas