testcase/file_func.sh

#!/bin/sh
#
# Copyright 2016 Google Inc. All rights reserved
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http:#www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

set -e

mk="$@"

echo "PASS" >testfile

cat <<EOF > Makefile
ifdef KATI
SUPPORTS_FILE := 1
endif
ifneq (,\$(filter 4.2%,\$(MAKE_VERSION)))
SUPPORTS_FILE := 1
endif

ifdef SUPPORTS_FILE
  \$(file >testwrite,PASS)
  \$(info Read not found: \$(if \$(file <notfound),FAIL,PASS))
  \$(info Read: \$(file < testfile))
  \$(info Read back: \$(file <testwrite))
else
  # Make <4 does not support \$(file ...)
  \$(info Read not found: PASS)
  \$(info Read: PASS)
  \$(info Read back: PASS)
endif

.PHONY: all
all:
EOF

${mk} 2>&1