=== DF-3604 build.sh — guest compile of trigger skeleton ($(date -u)) ===
Command: cc -o trigger trigger.c
BUILD_OK
./trigger -> "DF-3604: trigger requires bce(4) hardware (BCM5706..5716); canary no-op on this guest" rc=0
(Full frame: driver code compiles/loads on the guest; the RX path itself needs BCM5706-5716 silicon.)