Hello everyone, this is my first post on the mailing list (as well as the first
package I'm attempting to publish), so please forgive any obvious errors.
I'm using a lot of Fortran code which relies on derived types to manage data
structures. The package compiles fine on Windows, Linux and Mac and passes all
checks, including the CI pipeline on GitHub provided by the RStudio folks.
However, upon submission I received an automatic reply shortly afterwards
saying the build had failed on CRAN's servers for Debian. The log gives the
following error:
flang/lib/Lower/CallInterface.cpp:949: not yet implemented: support for
polymorphic types
I tried searching this mailing list as well as the llvm docs for a precedent or
explanation, without much success. The baffling thing is that my code doesn't
use polymorphism at all as far as I can tell, they're just DTs with bound
procedures (I don't think the Fortran standard considers this polymorphic?). My
question is: what can I do about it? This is a compiler issue, but I doesn't
seem from "Writing R Extensions" that CRAN allows you to check the installed
compiler and abort the install if an unsupported one is detected. However, it's
not really a package developer's fault that the compiler doesn't support the
standard.
Thanks in advance,
Othman El Hammouchi
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