Found the following significant warnings:
  funs.cpp:927:40: warning: variable 'b' is uninitialized when used here [-Wuninitialized]
See ‘/home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/bcf.Rcheck/00install.out’ for details.
* used C++ compiler: ‘Debian clang version 15.0.6’
Specified C++11: please drop specification unless essential
Specified C++11: please drop specification unless essential
Found the following significant warnings:
  funs.cpp:927:40: warning: variable 'b' is uninitialized when used here [-Wuninitialized]
See ‘/data/gannet/ripley/R/packages/tests-clang/bcf.Rcheck/00install.out’ for details.
* used C++ compiler: ‘clang version 16.0.0’
Specified C++11: please drop specification unless essential
Specified C++11: please drop specification unless essential
Specified C++11: please drop specification unless essential
Specified C++11: please drop specification unless essential
Installation failed.
See ‘/Volumes/Builds/packages/big-sur-arm64/results/4.2/bcf.Rcheck/00install.out’ for details.