Comment (by Roland Haas):

Sorry, I forgot to respond to this. Looking at the make.code.defn file I do not understand why it even would ever try to compile include_modulefiles_MRNS.f90 at all since it is not even listed in the SRCS line. So I am very confused. Is there any chance that I could get to see the whole source code?

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2679/how-to-link-an-externally-compiled-library