$ cd /root/df3321 && sh build.sh
cc -O -o /root/df3321/gif_ihl15 /root/df3321/gif_ihl15.c
cc -O -o /root/df3321/gif_tcp_off15 /root/df3321/gif_tcp_off15.c
built: gif_ihl15 gif_tcp_off15

(first attempt failed: gif_tcp_off15.c had a nested /* */ comment block;
 fixed by removing the inner comment markers - then clean compile, no warnings)

Fixed-kernel build (fix validation):
  cd /usr/src && git apply /root/fix.diff    (if_gif.c, mpls_input.c, ip_mroute.c patched)
  cd /usr/src && make -j 8 nativekernel KERNCONF=X86_64_GENERIC
    ...
    linking kernel.debug
    >>> Kernel build for X86_64_GENERIC completed on Thu Sep 10 20:33:29 UTC 2026
  cd /usr/src && make installkernel KERNCONF=X86_64_GENERIC
    INSTALLED  /boot/kernel/kernel Sep 10 20:42
  reboot -> DragonFly dfbsd 6.5-DEVELOPMENT #1: Thu Sep 10 20:30:33 UTC 2026