#!/bin/sh
# -O0 REQUIRED: at -O2 gcc sees plane_states[MAX_SURFACES=3] and elides the
# OOB iterations as UB (-faggressive-loop-optimizations). The kernel builds at
# -O2 and MAY silently clamp the loop to 3 — which is itself worth noting (the
# bug may be compiled out by the optimizer, but relying on that is fragile and
# the correct fix is the explicit bounds check). -O0 shows the real overflow.
set -e
cd "$(dirname "$0")"
cc -O0 -Wall -o harness harness.c
echo "BUILD_EXIT=$?"
ls -l harness