Found the following significant warnings:
  /home/hornik/tmp/R.check/r-devel-gcc/Work/build/include/R_ext/Callbacks.h:32:2: warning: ‘#warning’ before C++23 is a GCC extension [-Wc++23-extensions]
  netClust.cpp:242:55: warning: ‘static out_eT arma::conv_to<out_eT>::from(const arma::Base<eT2, expr>&, const typename arma::arma_not_cx<in_eT>::result*) [with in_eT = unsigned int; T1 = arma::mtOp<unsigned int, arma::mtOp<unsigned int, arma::Col<double>, arma::op_rel_eq>, arma::op_find_simple>; out_eT = unsigned int; typename arma::arma_not_cx<in_eT>::result = unsigned int]’ is deprecated: replace conv_to<...>::from(X) with as_scalar(X) [-Wdeprecated-declarations]
  netClust.cpp:325:55: warning: ‘static out_eT arma::conv_to<out_eT>::from(const arma::Base<eT2, expr>&, const typename arma::arma_not_cx<in_eT>::result*) [with in_eT = unsigned int; T1 = arma::mtOp<unsigned int, arma::mtOp<unsigned int, arma::Col<double>, arma::op_rel_eq>, arma::op_find_simple>; out_eT = unsigned int; typename arma::arma_not_cx<in_eT>::result = unsigned int]’ is deprecated: replace conv_to<...>::from(X) with as_scalar(X) [-Wdeprecated-declarations]
  netClust.cpp:1243:55: warning: ‘static out_eT arma::conv_to<out_eT>::from(const arma::Base<eT2, expr>&, const typename arma::arma_not_cx<in_eT>::result*) [with in_eT = unsigned int; T1 = arma::mtOp<unsigned int, arma::mtOp<unsigned int, arma::Col<double>, arma::op_rel_eq>, arma::op_find_simple>; out_eT = unsigned int; typename arma::arma_not_cx<in_eT>::result = unsigned int]’ is deprecated: replace conv_to<...>::from(X) with as_scalar(X) [-Wdeprecated-declarations]
  netClust.cpp:1304:55: warning: ‘static out_eT arma::conv_to<out_eT>::from(const arma::Base<eT2, expr>&, const typename arma::arma_not_cx<in_eT>::result*) [with in_eT = unsigned int; T1 = arma::mtOp<unsigned int, arma::mtOp<unsigned int, arma::Col<double>, arma::op_rel_eq>, arma::op_find_simple>; out_eT = unsigned int; typename arma::arma_not_cx<in_eT>::result = unsigned int]’ is deprecated: replace conv_to<...>::from(X) with as_scalar(X) [-Wdeprecated-declarations]
See ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/netClust.Rcheck/00install.out’ for details.
* used C++ compiler: ‘g++-15 (Debian 15.2.0-9) 15.2.0’