# DF-3118 build log (guest, captured from session)
$ cc -O2 -I/usr/src/sys -o /root/poc/burn /root/poc/burn.c
BUILD-OK
$ cc -O2 -o /tmp/hmr/burn/writer /root/poc/writer.c   (OK)
$ cd /root/poc && make            # seqshift.ko / seqstat.ko via bsd.kmod.mk
cc ... -Werror -DKLD_MODULE ... -c seqshift.c
cc -Wl,--build-id=sha1 -nostdlib -Wl,--hash-style=sysv -r -Wl,-d -o seqshift.ko seqshift.o
(seqstat.ko same; see fix_build.log for the patched-hammer module build)