== build cmd (guest, as uid 1001) ==
cc -O2 -Wall -o psm_ioctl_poc psm_ioctl_poc.c
cc -O2 -Wall -o hold_probe hold_probe.c

== BUILD OK ==
(no warnings on final build; earlier iterations warned about MOUSE_SETRATE being #if 0 in mouse.h -- fixed by using MOUSE_SETMODE)