* installing *source* package ‘intervals’ ...
** using staged installation
** libs
using C compiler: ‘Debian clang version 18.1.8 (9)’
using C++ compiler: ‘Debian clang version 18.1.8 (9)’
clang++-18  -std=gnu++17 -I"/home/hornik/tmp/R-d-clang-18/include" -DNDEBUG   -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 Endpoint.cpp -o Endpoint.o
clang-18  -I"/home/hornik/tmp/R-d-clang-18/include" -DNDEBUG   -I/usr/local/include -DUSE_TYPE_CHECKING_STRICT -D_FORTIFY_SOURCE=3 -DSTRICT_R_HEADERS=1  -fpic  -g -O3 -Wall -pedantic -c init.c -o init.o
clang++-18  -std=gnu++17 -I"/home/hornik/tmp/R-d-clang-18/include" -DNDEBUG   -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 plot_overlap.cpp -o plot_overlap.o
clang++-18  -std=gnu++17 -I"/home/hornik/tmp/R-d-clang-18/include" -DNDEBUG   -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 reduce.cpp -o reduce.o
reduce.cpp:49:4: error: use of undeclared identifier 'error'
   49 |           error("Internal error: unexpected endpoint type when score = 0.");
      |           ^
reduce.cpp:56:4: error: use of undeclared identifier 'error'
   56 |           error("Internal error: unexpected endpoint type when score = 0.");
      |           ^
reduce.cpp:63:7: error: use of undeclared identifier 'error'
   63 |       error("Internal error: mismatched start and end endpoint sets.");
      |       ^
reduce.cpp:70:32: error: use of undeclared identifier 'allocMatrix'; did you mean 'Rf_allocMatrix'?
   70 |     SET_VECTOR_ELT( result, 0, allocMatrix( REALSXP, start.size(), 2 ) );
      |                                ^~~~~~~~~~~
      |                                Rf_allocMatrix
/home/hornik/tmp/R-d-clang-18/include/Rinternals.h:501:6: note: 'Rf_allocMatrix' declared here
  501 | SEXP Rf_allocMatrix(SEXPTYPE, int, int);
      |      ^
reduce.cpp:78:34: error: use of undeclared identifier 'allocMatrix'; did you mean 'Rf_allocMatrix'?
   78 |       SET_VECTOR_ELT( result, 1, allocMatrix( LGLSXP, start.size(), 2 ) );
      |                                  ^~~~~~~~~~~
      |                                  Rf_allocMatrix
/home/hornik/tmp/R-d-clang-18/include/Rinternals.h:501:6: note: 'Rf_allocMatrix' declared here
  501 | SEXP Rf_allocMatrix(SEXPTYPE, int, int);
      |      ^
5 errors generated.
make: *** [/home/hornik/tmp/R-d-clang-18/etc/Makeconf:202: reduce.o] Error 1
ERROR: compilation failed for package ‘intervals’
* removing ‘/srv/hornik/tmp/CRAN/intervals.Rcheck/intervals’