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#!/bin/bash -eu
# Copyright 2017 Glenn Randers-Pehrson
# Copyright 2016 Google Inc.
#
# 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.
#
# Last changed in libpng 1.6.33 [September 28, 2017]
#
# Revisions by Glenn Randers-Pehson, 2017:
# 1. Build only the library, not the tools (changed "make -j$(nproc) all" to
# "make -j$(nproc) libpng16.la").
# 2. Disabled WARNING and WRITE options in pnglibconf.dfa.
################################################################################
# Disable logging via library build configuration control.
cat scripts/pnglibconf.dfa | \
sed -e "s/option STDIO/option STDIO disabled/" \
-e "s/option WARNING /option WARNING disabled/" \
-e "s/option WRITE enables WRITE_INT_FUNCTIONS/option WRITE disabled/" \
> scripts/pnglibconf.dfa.temp
mv scripts/pnglibconf.dfa.temp scripts/pnglibconf.dfa
# build the library.
autoreconf -f -i
./configure
make -j$(nproc) clean
make -j$(nproc) libpng16.la
# build libpng_read_fuzzer.
$CXX $CXXFLAGS -std=c++11 -I. \
$SRC/libpng/contrib/oss-fuzz/libpng_read_fuzzer.cc \
-o $OUT/libpng_read_fuzzer \
-lFuzzingEngine .libs/libpng16.a -lz
# add seed corpus.
find $SRC/libpng -name "*.png" | grep -v crashers | \
xargs zip $OUT/libpng_read_fuzzer_seed_corpus.zip
cp $SRC/libpng/contrib/oss-fuzz/*.dict \
$SRC/libpng/contrib/oss-fuzz/*.options $OUT/
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