* installing to library ‘/home/hornik/tmp/R.check/r-devel-clang/Work/build/Packages’ * installing *source* package ‘coop’ ... ** package ‘coop’ successfully unpacked and MD5 sums checked ** using staged installation ** libs using C compiler: ‘Debian clang version 18.1.4 (1)’ make[1]: Entering directory '/tmp/RtmpiJKsUh/R.INSTALL32cadc24e9820e/coop/src' clang-18 -I"/home/hornik/tmp/R.check/r-devel-clang/Work/build/include" -DNDEBUG -I/usr/local/include -D_FORTIFY_SOURCE=3 -fpic -g -O3 -Wall -pedantic -c R_checks.c -o R_checks.o clang-18 -I"/home/hornik/tmp/R.check/r-devel-clang/Work/build/include" -DNDEBUG -I/usr/local/include -D_FORTIFY_SOURCE=3 -fpic -g -O3 -Wall -pedantic -c R_naomit.c -o R_naomit.o R_naomit.c:71:3: warning: loop not vectorized: the optimizer was unable to perform the requested transformation; the transformation might be disabled or specified as part of an unsupported transformation ordering [-Wpass-failed=transform-warning] 71 | for (int i=0; i