* installing *source* package ‘circular’ ...
** using staged installation
** libs
using C compiler: ‘Debian clang version 18.1.8 (9)’
using Fortran compiler: ‘Debian flang-new version 18.1.8 (9)’
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 distance.c -o distance.o
flang-new-18  -fpic  -g -O2 -c dwrappednormal.f -o dwrappednormal.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  -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 mean.circular.c -o mean.circular.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 median.circular.c -o median.circular.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 medianHL.circular.c -o medianHL.circular.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 minuspipluspi.c -o minuspipluspi.o
minuspipluspi.c:17:22: error: use of undeclared identifier 'PI'
   17 |      x[i] = (x[i] < -PI)?(x[i] + (2 * PI)):(x[i]);
      |                      ^
minuspipluspi.c:17:39: error: use of undeclared identifier 'PI'
   17 |      x[i] = (x[i] < -PI)?(x[i] + (2 * PI)):(x[i]);
      |                                       ^
minuspipluspi.c:18:21: error: use of undeclared identifier 'PI'
   18 |      x[i] = (x[i] > PI)?(x[i] - (2 * PI)):(x[i]);
      |                     ^
minuspipluspi.c:18:38: error: use of undeclared identifier 'PI'
   18 |      x[i] = (x[i] > PI)?(x[i] - (2 * PI)):(x[i]);
      |                                      ^
4 errors generated.
make: *** [/home/hornik/tmp/R-d-clang-18/etc/Makeconf:195: minuspipluspi.o] Error 1
ERROR: compilation failed for package ‘circular’
* removing ‘/srv/hornik/tmp/CRAN_pretest/circular.Rcheck/circular’