Found the following significant warnings:
  Bos.cpp:247:10: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  Bos.cpp:284:12: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  Bos.cpp:787:12: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  Bos.cpp:909:10: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  Bos.cpp:911:10: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  Bos.cpp:913:9: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  Bos.cpp:975:10: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  Bos.cpp:991:10: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  Bos.cpp:993:10: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  Bos.cpp:995:9: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  Bos.cpp:1049:10: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  Bos.cpp:1090:10: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  Bos.cpp:1094:11: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  Bos.cpp:1097:11: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  Bos.cpp:1103:10: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  Bos.cpp:1106:10: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
See ‘/home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/mixedClust.Rcheck/00install.out’ for details.
* used C++ compiler: ‘Debian clang version 17.0.6 (2)’