1#!/usr/bin/env bash
2
3# Licensed to the Apache Software Foundation (ASF) under one
4# or more contributor license agreements.  See the NOTICE file
5# distributed with this work for additional information
6# regarding copyright ownership.  The ASF licenses this file
7# to you under the Apache License, Version 2.0 (the
8# "License"); you may not use this file except in compliance
9# with the License.  You may obtain a copy of the License at
10#
11#   http://www.apache.org/licenses/LICENSE-2.0
12#
13# Unless required by applicable law or agreed to in writing,
14# software distributed under the License is distributed on an
15# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16# KIND, either express or implied.  See the License for the
17# specific language governing permissions and limitations
18# under the License.
19
20# This script builds the static library of libpng that can be used as dependency of mxnet/opencv.
21set -ex
22PNG_VERSION=1.6.35
23if [[ ! -f $DEPS_PATH/lib/libpng.a ]]; then
24    # download and build libpng
25    >&2 echo "Building libpng..."
26    download \
27        https://github.com/glennrp/libpng/archive/v${PNG_VERSION}.zip \
28        ${DEPS_PATH}/libpng.zip
29    unzip -q $DEPS_PATH/libpng.zip -d $DEPS_PATH
30    mkdir -p $DEPS_PATH/libpng-$PNG_VERSION/build
31    pushd .
32    cd $DEPS_PATH/libpng-$PNG_VERSION/build
33    cmake \
34          -D PNG_SHARED=OFF \
35          -D PNG_STATIC=ON \
36          -D CMAKE_BUILD_TYPE=RELEASE \
37          -D CMAKE_INSTALL_PREFIX=$DEPS_PATH \
38          -D CMAKE_C_FLAGS=-fPIC ..
39    $MAKE
40    $MAKE install
41    mkdir -p $DEPS_PATH/include/libpng
42    ln -s $DEPS_PATH/include/png.h $DEPS_PATH/include/libpng/png.h
43    popd
44fi
45