Found the following significant warnings:
  Bos.cpp:244:10: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  Bos.cpp:283:12: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  Bos.cpp:955:12: 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:1092:10: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  Bos.cpp:1094:9: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  Bos.cpp:1153:10: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  Bos.cpp:1169:10: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  Bos.cpp:1171:10: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  Bos.cpp:1173:9: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  Bos.cpp:1267:10: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  Bos.cpp:1271:11: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  Bos.cpp:1274:11: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  Bos.cpp:1280:10: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  Bos.cpp:1283:10: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  ClassificationMContext.cpp:141:12: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  ClusteringContext.cpp:137:13: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  ClusteringContext.cpp:152:13: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  ClusteringContext.cpp:226:12: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  ordinalClust.cpp:755:10: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  ordinalClust.cpp:757:10: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  ordinalClust.cpp:759:9: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  ordinalClust.cpp:813:10: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  ordinalClust.cpp:829:10: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  ordinalClust.cpp:831:10: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  ordinalClust.cpp:833:9: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  ordinalClust.cpp:887:10: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  ordinalClust.cpp:947:10: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  ordinalClust.cpp:951:11: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  ordinalClust.cpp:954:11: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  ordinalClust.cpp:960:10: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
  ordinalClust.cpp:963:10: warning: 'operator<<' is deprecated: use braced initialiser list instead [-Wdeprecated-declarations]
See ‘/home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/ordinalClust.Rcheck/00install.out’ for details.
* used C++ compiler: ‘Debian clang version 17.0.6 (3)’