* installing *source* package ‘blockTools’ ...
** using staged installation
** libs
using C compiler: ‘Debian clang version 18.1.8 (12)’
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 getDist.c -o getDist.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 naive.c -o naive.o
naive.c:36:15: error: call to undeclared function 'Calloc'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   36 |   double *vec=Calloc(n, double), *vec2=Calloc(n, double);
      |               ^
naive.c:36:25: error: expected expression
   36 |   double *vec=Calloc(n, double), *vec2=Calloc(n, double);
      |                         ^
naive.c:36:50: error: expected expression
   36 |   double *vec=Calloc(n, double), *vec2=Calloc(n, double);
      |                                                  ^
3 errors generated.
make: *** [/home/hornik/tmp/R-d-clang-18/etc/Makeconf:195: naive.o] Error 1
ERROR: compilation failed for package ‘blockTools’
* removing ‘/srv/hornik/tmp/CRAN_pretest/blockTools.Rcheck/blockTools’