* installing *source* package ‘mrfse’ ...
** using staged installation
** libs
using C++ compiler: ‘Debian clang version 19.1.1 (1)’
clang++-19  -std=gnu++17 -I"/home/hornik/tmp/R-d-clang-19/include" -DNDEBUG  -I'/home/hornik/lib/R/Library/4.5/x86_64-linux-gnu/Rcpp/include' -I/usr/local/include -DUSE_TYPE_CHECKING_STRICT -D_FORTIFY_SOURCE=3 -DSTRICT_R_HEADERS=1  -fpic  -g -O3 -Wall -pedantic -DR_NO_REMAP -c RcppExports.cpp -o RcppExports.o
clang++-19  -std=gnu++17 -I"/home/hornik/tmp/R-d-clang-19/include" -DNDEBUG  -I'/home/hornik/lib/R/Library/4.5/x86_64-linux-gnu/Rcpp/include' -I/usr/local/include -DUSE_TYPE_CHECKING_STRICT -D_FORTIFY_SOURCE=3 -DSTRICT_R_HEADERS=1  -fpic  -g -O3 -Wall -pedantic -DR_NO_REMAP -c array.cpp -o array.o
clang++-19  -std=gnu++17 -I"/home/hornik/tmp/R-d-clang-19/include" -DNDEBUG  -I'/home/hornik/lib/R/Library/4.5/x86_64-linux-gnu/Rcpp/include' -I/usr/local/include -DUSE_TYPE_CHECKING_STRICT -D_FORTIFY_SOURCE=3 -DSTRICT_R_HEADERS=1  -fpic  -g -O3 -Wall -pedantic -DR_NO_REMAP -c combination.cpp -o combination.o
clang++-19  -std=gnu++17 -I"/home/hornik/tmp/R-d-clang-19/include" -DNDEBUG  -I'/home/hornik/lib/R/Library/4.5/x86_64-linux-gnu/Rcpp/include' -I/usr/local/include -DUSE_TYPE_CHECKING_STRICT -D_FORTIFY_SOURCE=3 -DSTRICT_R_HEADERS=1  -fpic  -g -O3 -Wall -pedantic -DR_NO_REMAP -c mrfse.cpp -o mrfse.o
mrfse.cpp:143:9: warning: variable 'accepted' set but not used [-Wunused-but-set-variable]
  143 |     int accepted = 0;
      |         ^
mrfse.cpp:288:16: warning: unused variable 'j' [-Wunused-variable]
  288 |     int i = 0, j = 0;
      |                ^
mrfse.cpp:308:9: warning: unused variable 'n' [-Wunused-variable]
  308 |     int n = aa.size();
      |         ^
mrfse.cpp:334:9: warning: unused variable 'n' [-Wunused-variable]
  334 |     int n = aa.size();
      |         ^
4 warnings generated.
clang++-19  -std=gnu++17 -I"/home/hornik/tmp/R-d-clang-19/include" -DNDEBUG  -I'/home/hornik/lib/R/Library/4.5/x86_64-linux-gnu/Rcpp/include' -I/usr/local/include -DUSE_TYPE_CHECKING_STRICT -D_FORTIFY_SOURCE=3 -DSTRICT_R_HEADERS=1  -fpic  -g -O3 -Wall -pedantic -DR_NO_REMAP -c mrfse_ci.cpp -o mrfse_ci.o
mrfse_ci.cpp:139:16: warning: unused variable 'j' [-Wunused-variable]
  139 |     int i = 0, j = 0;
      |                ^
mrfse_ci.cpp:295:10: warning: unused variable 'e' [-Wunused-variable]
  295 |             int e = 3 + b[i][j];
      |                 ^
mrfse_ci.cpp:309:10: warning: unused variable 'e' [-Wunused-variable]
  309 |             int e = c[i][j] + 34;
      |                 ^
mrfse_ci.cpp:320:9: warning: unused variable 'n' [-Wunused-variable]
  320 |     int n = aa.size();
      |         ^
mrfse_ci.cpp:23:13: warning: unused variable 'use_kl' [-Wunused-variable]
   23 | static bool use_kl;
      |             ^~~~~~
5 warnings generated.
clang++-19  -std=gnu++17 -I"/home/hornik/tmp/R-d-clang-19/include" -DNDEBUG  -I'/home/hornik/lib/R/Library/4.5/x86_64-linux-gnu/Rcpp/include' -I/usr/local/include -DUSE_TYPE_CHECKING_STRICT -D_FORTIFY_SOURCE=3 -DSTRICT_R_HEADERS=1  -fpic  -g -O3 -Wall -pedantic -DR_NO_REMAP -c product.cpp -o product.o
clang++-19  -std=gnu++17 -I"/home/hornik/tmp/R-d-clang-19/include" -DNDEBUG  -I'/home/hornik/lib/R/Library/4.5/x86_64-linux-gnu/Rcpp/include' -I/usr/local/include -DUSE_TYPE_CHECKING_STRICT -D_FORTIFY_SOURCE=3 -DSTRICT_R_HEADERS=1  -fpic  -g -O3 -Wall -pedantic -DR_NO_REMAP -c simulated_annealing.cpp -o simulated_annealing.o
clang++-19  -std=gnu++17 -I"/home/hornik/tmp/R-d-clang-19/include" -DNDEBUG  -I'/home/hornik/lib/R/Library/4.5/x86_64-linux-gnu/Rcpp/include' -I/usr/local/include -DUSE_TYPE_CHECKING_STRICT -D_FORTIFY_SOURCE=3 -DSTRICT_R_HEADERS=1  -fpic  -g -O3 -Wall -pedantic -DR_NO_REMAP -c util.cpp -o util.o
util.cpp:10:2: error: use of undeclared identifier 'error'
   10 |         error("malloc/calloc returned NULL!\n");
      |         ^
1 error generated.
make: *** [/home/hornik/tmp/R-d-clang-19/etc/Makeconf:202: util.o] Error 1
ERROR: compilation failed for package ‘mrfse’
* removing ‘/srv/hornik/tmp/CRAN_pretest/mrfse.Rcheck/mrfse’