For closure, I was advised by Professor Ripley to both pass
"-std=f008" in Makevars and add "SystemRequirements: A version of
gfortran supporting Fortran 2008" to the DESCRIPTION. CRAN accepted
the package with those two changes. I also note that the R Daily News
of 2023-02-03 [1] has the following
I would like to convert some of my hand-rolled Fortran code to Fortran
intrinsics which entered the language in Fortran 2008, which should be
extremely widely supported at this time. Specifically, I would like to
use the log_gamma function and ieee_arithmetic functions and values.
If it helps, the
