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 17 set -u 18 19 mk="$@" 20 21 if echo "${mk}" | grep -q "^make"; then 22 # Make doesn't support final assignment 23 echo "Makefile:3: *** cannot assign to readonly variable: FOO" 24 else 25 cat <<EOF > Makefile 26 all: FOO +=$= bar 27 FOO +=$= foo 28 all: FOO +=$= baz 29 all: 30 EOF 31 32 ${mk} 2>&1 && echo "Clean exit" 33 fi 34
