* installing *source* package ‘mgee2’ ...
** using staged installation
** libs
using C compiler: ‘Debian clang version 19.1.2 (2)’
clang-19  -I"/home/hornik/tmp/R-d-clang-19/include" -DNDEBUG   -I/usr/local/include -DUSE_TYPE_CHECKING_STRICT -D_FORTIFY_SOURCE=3 -DSTRICT_R_HEADERS=1  -fpic  -g -O3 -Wall -pedantic -c mgee2.c -o mgee2.o
mgee2.c:66:10: warning: variable 'one_ptr' set but not used [-Wunused-but-set-variable]
   66 |     int *one_ptr;
      |          ^
mgee2.c:645:27: warning: variable 'last_iter' set but not used [-Wunused-but-set-variable]
  645 |     int one, maxit, iter, last_iter, convergence;
      |                           ^
mgee2.c:645:38: warning: variable 'convergence' set but not used [-Wunused-but-set-variable]
  645 |     int one, maxit, iter, last_iter, convergence;
      |                                      ^
mgee2.c:646:16: warning: variable 'n_extID' set but not used [-Wunused-but-set-variable]
  646 |     int nENUM, n_extID, len_Z, nrow_DM_i, nXDM_ENUM;
      |                ^
mgee2.c:646:25: warning: variable 'len_Z' set but not used [-Wunused-but-set-variable]
  646 |     int nENUM, n_extID, len_Z, nrow_DM_i, nXDM_ENUM;
      |                         ^
mgee2.c:2438:5: error: call to undeclared function 'Free'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
 2438 |     Free(z); Free(det);
      |     ^
mgee2.c:2438:5: note: did you mean 'free'?
/usr/include/stdlib.h:687:13: note: 'free' declared here
  687 | extern void free (void *__ptr) __THROW;
      |             ^
mgee2.c:2882:9: error: call to undeclared function 'Free'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
 2882 |         Free(z); Free(det);
      |         ^
mgee2.c:2914:5: error: call to undeclared function 'Free'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
 2914 |     Free(z); Free(det);
      |     ^
mgee2.c:3003:12: warning: variable 'elem' set but not used [-Wunused-but-set-variable]
 3003 |     double elem;
      |            ^
6 warnings and 3 errors generated.
make: *** [/home/hornik/tmp/R-d-clang-19/etc/Makeconf:195: mgee2.o] Error 1
ERROR: compilation failed for package ‘mgee2’
* removing ‘/srv/hornik/tmp/CRAN_pretest/mgee2.Rcheck/mgee2’