Found the following significant warnings:
  ./../inst/include/lesstimate/include/lesstimate/ista_class.h:306:20: warning: 'is_finite<double>' is deprecated: change arma::is_finite(val) to std::isfinite(val) [-Wdeprecated-declarations]
  ./../inst/include/lesstimate/include/lesstimate/ista_class.h:318:20: warning: 'is_finite<double>' is deprecated: change arma::is_finite(val) to std::isfinite(val) [-Wdeprecated-declarations]
  ./../inst/include/lesstimate/include/lesstimate/ista_class.h:369:22: warning: 'is_finite<arma::Mat<double>>' is deprecated: change arma::is_finite(X) to X.is_finite() [-Wdeprecated-declarations]
  ./../inst/include/lesstimate/include/lesstimate/bfgs.h:71:16: warning: 'is_finite<arma::Mat<double>>' is deprecated: change arma::is_finite(X) to X.is_finite() [-Wdeprecated-declarations]
  ./../inst/include/lesstimate/include/lesstimate/glmnet_class.h:306:18: warning: 'is_finite<double>' is deprecated: change arma::is_finite(val) to std::isfinite(val) [-Wdeprecated-declarations]
  ./../inst/include/lesstimate/include/lesstimate/glmnet_class.h:346:20: warning: 'is_finite<arma::Mat<double>>' is deprecated: change arma::is_finite(X) to X.is_finite() [-Wdeprecated-declarations]
  ./../inst/include/lesstimate/include/lesstimate/glmnet_mcp.h:282:20: warning: 'is_finite<double>' is deprecated: change arma::is_finite(val) to std::isfinite(val) [-Wdeprecated-declarations]
  ./../inst/include/lesstimate/include/lesstimate/glmnet_lsp.h:216:20: warning: 'is_finite<double>' is deprecated: change arma::is_finite(val) to std::isfinite(val) [-Wdeprecated-declarations]
  ./../inst/include/lesstimate/include/lesstimate/bfgsOptim.h:188:18: warning: 'is_finite<double>' is deprecated: change arma::is_finite(val) to std::isfinite(val) [-Wdeprecated-declarations]
  ./../inst/include/lesstimate/include/lesstimate/bfgsOptim.h:226:20: warning: 'is_finite<arma::Mat<double>>' is deprecated: change arma::is_finite(X) to X.is_finite() [-Wdeprecated-declarations]
  ../inst/include/lesstimate/include/lesstimate/ista_class.h:306:20: warning: 'is_finite<double>' is deprecated: change arma::is_finite(val) to std::isfinite(val) [-Wdeprecated-declarations]
  ../inst/include/lesstimate/include/lesstimate/ista_class.h:318:20: warning: 'is_finite<double>' is deprecated: change arma::is_finite(val) to std::isfinite(val) [-Wdeprecated-declarations]
  ../inst/include/lesstimate/include/lesstimate/ista_class.h:369:22: warning: 'is_finite<arma::Mat<double>>' is deprecated: change arma::is_finite(X) to X.is_finite() [-Wdeprecated-declarations]
  ../inst/include/lesstimate/include/lesstimate/bfgs.h:71:16: warning: 'is_finite<arma::Mat<double>>' is deprecated: change arma::is_finite(X) to X.is_finite() [-Wdeprecated-declarations]
  ../inst/include/lesstimate/include/lesstimate/glmnet_class.h:306:18: warning: 'is_finite<double>' is deprecated: change arma::is_finite(val) to std::isfinite(val) [-Wdeprecated-declarations]
  ../inst/include/lesstimate/include/lesstimate/glmnet_class.h:346:20: warning: 'is_finite<arma::Mat<double>>' is deprecated: change arma::is_finite(X) to X.is_finite() [-Wdeprecated-declarations]
  ../inst/include/lesstimate/include/lesstimate/glmnet_mcp.h:282:20: warning: 'is_finite<double>' is deprecated: change arma::is_finite(val) to std::isfinite(val) [-Wdeprecated-declarations]
  ../inst/include/lesstimate/include/lesstimate/glmnet_lsp.h:216:20: warning: 'is_finite<double>' is deprecated: change arma::is_finite(val) to std::isfinite(val) [-Wdeprecated-declarations]
  ../inst/include/lesstimate/include/lesstimate/bfgsOptim.h:188:18: warning: 'is_finite<double>' is deprecated: change arma::is_finite(val) to std::isfinite(val) [-Wdeprecated-declarations]
  ../inst/include/lesstimate/include/lesstimate/bfgsOptim.h:226:20: warning: 'is_finite<arma::Mat<double>>' is deprecated: change arma::is_finite(X) to X.is_finite() [-Wdeprecated-declarations]
See ‘/data/gannet/ripley/R/packages/tests-clang/lessSEM.Rcheck/00install.out’ for details.
* used C++ compiler: ‘clang version 21.1.1’