--- mlx ioctl trigger guest compile-test (DragonFly 6.5-DEVELOPMENT cc)
$ cc -O2 -Wall -o mlx_ioctl_trigger mlx_ioctl_trigger.c
BUILD_RC=0

--- guest run (no Mylex DAC960 controller in QEMU guest)
$ ./mlx_ioctl_trigger <mode> /dev/mlx0
open(/dev/mlx0): No such file or directory (no Mylex DAC960 controller on this guest - hardware-gated trigger)
RUN_RC=2