1#!/bin/bash 2# 3# Copyright 2018 Google Inc. All rights reserved 4# 5# Licensed under the Apache License, Version 2.0 (the "License"); 6# you may not use this file except in compliance with the License. 7# You may obtain a copy of the License at 8# 9# http:#www.apache.org/licenses/LICENSE-2.0 10# 11# Unless required by applicable law or agreed to in writing, software 12# distributed under the License is distributed on an "AS IS" BASIS, 13# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14# See the License for the specific language governing permissions and 15# limitations under the License. 16 17set -u 18 19mk="$@" 20 21if echo "${mk}" | grep -q "^make"; then 22 # Make doesn't support final assignment 23 echo "Makefile:3: *** cannot assign to readonly variable: FOO" 24else 25 cat <<EOF > Makefile 26all: FOO :=$= bar 27FOO +=$= foo 28all: FOO +=$= baz 29all: 30EOF 31 32 ${mk} 2>&1 && echo "Clean exit" 33fi 34