#!/bin/bash

#
# Copyright (C) 2016 The Android Open Source Project
#
# 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.
#

# This shell-script checks the symbols in libbvb_refimpl.a and fails
# if a reference not starting with bvb_ is referenced. It's intended
# to catch mistakes where the standard C library is inadvertently
# used.

set -e

SYMBOLS_FILE=$(mktemp /tmp/libbvb_refimpl_symbols.XXXXXXXXXX)

trap "rm -f '${SYMBOLS_FILE}'" EXIT

readelf --symbols --wide "${ANDROID_HOST_OUT}/obj/STATIC_LIBRARIES/libbvb_refimpl_intermediates/libbvb_refimpl.a" | \
  awk '$7 == "UND" && $8 != "" {print $8}' | \
  grep -v ^bvb_ | \
  sort -u > "${SYMBOLS_FILE}"

# If this file is non-empty, it means that the library is using
# symbols not starting with "bvb_".
if [ -s "${SYMBOLS_FILE}" ] ; then
  echo "ERROR: $0: Unexpected symbols in libbvb_refimpl:" >&2
  cat "${SYMBOLS_FILE}" >&2
  exit 1
fi