cc -O2 ... -D_KERNEL -Wall ... -Werror -DKLD_MODULE -nostdinc -I. -Idragonfly -I/usr/src/df4276/forwarder_x86_64/include ... -c df4276_rep.c
cc -Wl,--build-id=sha1 -nostdlib -Wl,--hash-style=sysv -r -Wl,-d -o df4276rep.ko df4276_rep.o
(final successful build; module loaded and ran cleanly)