Found the following significant warnings:
  FBFsearch.cpp:164:8: warning: 'is_finite<double>' is deprecated: change arma::is_finite(val) to std::isfinite(val) [-Wdeprecated-declarations]
  FBFsearch.cpp:229:8: warning: 'is_finite<double>' is deprecated: change arma::is_finite(val) to std::isfinite(val) [-Wdeprecated-declarations]
  FBFsearch.cpp:318:23: warning: 'from<double, arma::eGlue<arma::Mat<double>, arma::Glue<arma::Op<arma::Mat<double>, arma::op_htrans>, arma::Col<double>, arma::glue_times>, arma::eglue_minus>>' is deprecated: replace conv_to<...>::from(X) with as_scalar(X) [-Wdeprecated-declarations]
  FBFsearch.cpp:320:41: warning: 'from<double, arma::subview_elem1<double, arma::Mat<unsigned int>>>' is deprecated: replace conv_to<...>::from(X) with as_scalar(X) [-Wdeprecated-declarations]
  FBFsearch.cpp:321:21: warning: 'from<unsigned int, arma::Mat<unsigned int>>' is deprecated: replace conv_to<...>::from(X) with as_scalar(X) [-Wdeprecated-declarations]
  FBFsearch.cpp:326:26: warning: 'from<double, arma::subview_elem1<double, arma::Mat<unsigned int>>>' is deprecated: replace conv_to<...>::from(X) with as_scalar(X) [-Wdeprecated-declarations]
  FBFsearch.cpp:340:14: warning: 'log_add<double>' is deprecated [-Wdeprecated-declarations]
  FBFsearch.cpp:341:14: warning: 'log_add<double>' is deprecated [-Wdeprecated-declarations]
  FBFsearch.cpp:357:32: warning: 'from<double, arma::Mat<double>>' is deprecated: replace conv_to<...>::from(X) with as_scalar(X) [-Wdeprecated-declarations]
  FBFsearch.cpp:362:24: warning: 'from<double, arma::eGlue<arma::Mat<double>, arma::Glue<arma::Op<arma::Mat<double>, arma::op_htrans>, arma::Col<double>, arma::glue_times>, arma::eglue_minus>>' is deprecated: replace conv_to<...>::from(X) with as_scalar(X) [-Wdeprecated-declarations]
  FBFsearch.cpp:376:7: warning: 'is_finite<double>' is deprecated: change arma::is_finite(val) to std::isfinite(val) [-Wdeprecated-declarations]
  FBFsearch.cpp:429:28: warning: 'from<double, arma::Mat<double>>' is deprecated: replace conv_to<...>::from(X) with as_scalar(X) [-Wdeprecated-declarations]
  FBFsearch.cpp:436:17: warning: 'log_add<double>' is deprecated [-Wdeprecated-declarations]
  FBFsearch.cpp:439:34: warning: 'log_add<double>' is deprecated [-Wdeprecated-declarations]
  FBFsearch.cpp:445:18: warning: 'log_add<double>' is deprecated [-Wdeprecated-declarations]
  FBFsearch.cpp:460:8: warning: 'max' is deprecated: use .index_max() instead [-Wdeprecated-declarations]
  FBFsearch.cpp:472:9: warning: 'is_finite<arma::Mat<double>>' is deprecated: change arma::is_finite(X) to X.is_finite() [-Wdeprecated-declarations]
  FBFsearch.cpp:498:15: warning: 'max' is deprecated: use .index_max() instead [-Wdeprecated-declarations]
  FBFsearch.cpp:514:32: warning: 'from<double, arma::Mat<double>>' is deprecated: replace conv_to<...>::from(X) with as_scalar(X) [-Wdeprecated-declarations]
  FBFsearch.cpp:521:21: warning: 'log_add<double>' is deprecated [-Wdeprecated-declarations]
  FBFsearch.cpp:524:38: warning: 'log_add<double>' is deprecated [-Wdeprecated-declarations]
  FBFsearch.cpp:637:18: warning: 'log_add<double>' is deprecated [-Wdeprecated-declarations]
  FBFsearch.cpp:706:15: warning: 'log_add<double>' is deprecated [-Wdeprecated-declarations]
  FBFsearch.cpp:799:16: warning: 'log_add<double>' is deprecated [-Wdeprecated-declarations]
See ‘/home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/FBFsearch.Rcheck/00install.out’ for details.
* used C compiler: ‘Debian clang version 19.1.7 (7)’
* used C++ compiler: ‘Debian clang version 19.1.7 (7)’