* installing *source* package ‘trngl’ ...
** using staged installation
using Fortran compiler: ‘Debian flang-new version 18.1.5 (2)’
flang-new-18  -fpic  -g -O2 -c  test-f03.f90 -o test-f03.o
error: loc("/srv/hornik/tmp/CRAN/trngl.Rcheck/00_pkg_src/trngl/test-f03.f90":1:1): flang/lib/Lower/CallInterface.cpp:949: not yet implemented: support for polymorphic types
LLVM ERROR: aborting
make: *** [/home/hornik/tmp/R-d-clang-18/etc/Makeconf:223: test-f03.o] Error 1
*********************************************************************************
Your Fortran compiler does not appear to support all features of the 2003
standard. Please install a compatible compiler, set this in your ~/.R/Makevars
and try again.
*********************************************************************************
ERROR: configuration failed for package ‘trngl’
* removing ‘/srv/hornik/tmp/CRAN/trngl.Rcheck/trngl’