Found the following significant warnings:
  rb_fast.cpp:160:8: warning: using integer absolute value function 'abs' when argument is of floating point type [-Wabsolute-value]
See ‘/home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/mlrv.Rcheck/00install.out’ for details.
* used C++ compiler: ‘Debian clang version 18.1.7 (1)’
installed size is  6.0Mb
  sub-directories of 1Mb or more:
    libs   5.7Mb
installed size is  6.1Mb
  sub-directories of 1Mb or more:
    libs   5.9Mb
installed size is  6.0Mb
  sub-directories of 1Mb or more:
    libs   5.7Mb
installed size is  6.1Mb
  sub-directories of 1Mb or more:
    libs   5.9Mb