# apply patch and
make -C lib/libc
cp -i include/stdlib.h /usr/include/
# mergesort(3) 4096 entries
cc -Wall /usr/obj/usr/img/freebsd.git/amd64.amd64/lib/libc/libc.a -O2 testsort.c && time ./a.out 12 3 2
# bsort(3) 4096 entries
cc -Wall /usr/obj/usr/img/freebsd.git/amd64.amd64/lib/libc/libc.a -O2 testsort.c && time ./a.out 12 2 2
# qsort(3) 4096 entries
cc -Wall /usr/obj/usr/img/freebsd.git/amd64.amd64/lib/libc/libc.a -O2 testsort.c && time ./a.out 12 1 2