Errors using certain Fortran compilers in CRAN checks

Thanks for this. So I assume that ‘flag’ needs to be in the makevars file? Not sure how the line should look like exactly. (After some googling), I tried:

PKG_FFLAGS⁠ = $ ifort -c -nogen-interfaces test_kind.f90

but that seems to be wrong… I am really not familiar with setting flags to be honest…