build exit=0

$ ./rflip_wedge /dev/dri/card0
open /dev/dri/card0: No such file or directory (no radeon KMS device => hardware-gated, cannot exercise here)
run exit=2
DragonFly dfbsd 6.5-DEVELOPMENT DragonFly 6.5-DEVELOPMENT #0: Thu Jul  2 06:02:54 UTC 2026     root@dfbsd:/usr/obj/usr/src/sys/X86_64_GENERIC  x86_64