arith11.0   [plain text]

# $FreeBSD$
# Try to divide the smallest integer by -1.
# On amd64 this causes SIGFPE, so make sure the shell checks.

# Calculate the minimum possible value, assuming two's complement and
# a certain interpretation of overflow when shifting left.
minint=1
while [ $((minint <<= 1)) -gt 0 ]; do
	:
done
v=$( eval ': $((minint / -1))' 2>&1 >/dev/null)
[ $? -ne 0 ] && [ -n "$v" ]