* installing *source* package ‘crs’ ...
** this is package ‘crs’ version ‘0.15-41’
** using staged installation
** libs
using C compiler: ‘Debian clang version 21.1.8 (3+b1)’
using C++ compiler: ‘Debian clang version 21.1.8 (3+b1)’
clang-21 -std=gnu23 -I"/home/hornik/tmp/R-d-clang-21/include" -DNDEBUG   -I/usr/local/include -DUSE_TYPE_CHECKING_STRICT -D_FORTIFY_SOURCE=3   -fpic  -g -O3 -Wall -pedantic -c RuniqueCombs.c -o RuniqueCombs.o
clang-21 -std=gnu23 -I"/home/hornik/tmp/R-d-clang-21/include" -DNDEBUG   -I/usr/local/include -DUSE_TYPE_CHECKING_STRICT -D_FORTIFY_SOURCE=3   -fpic  -g -O3 -Wall -pedantic -c bspline.c -o bspline.o
bspline.c:1234:22: error: use of undeclared identifier 'SIZE_MAX'
 1234 |   if (n2 > 0 && n1 > SIZE_MAX / n2)
      |                      ^~~~~~~~
1 error generated.
make: *** [/home/hornik/tmp/R-d-clang-21/etc/Makeconf:190: bspline.o] Error 1
ERROR: compilation failed for package ‘crs’
* removing ‘/srv/hornik/tmp/CRAN_pretest/crs.Rcheck/crs’