1#!/bin/bash -eu
2# Copyright 2017 Glenn Randers-Pehrson
3# Copyright 2016 Google Inc.
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# Last changed in libpng 1.6.33 [September 28, 2017]
18#
19# Revisions by Glenn Randers-Pehson, 2017:
20# 1. Build only the library, not the tools (changed "make -j$(nproc) all" to
21#     "make -j$(nproc) libpng16.la").
22# 2. Disabled WARNING and WRITE options in pnglibconf.dfa.
23################################################################################
24
25# Disable logging via library build configuration control.
26cat scripts/pnglibconf.dfa | \
27  sed -e "s/option STDIO/option STDIO disabled/" \
28      -e "s/option WARNING /option WARNING disabled/" \
29      -e "s/option WRITE enables WRITE_INT_FUNCTIONS/option WRITE disabled/" \
30> scripts/pnglibconf.dfa.temp
31mv scripts/pnglibconf.dfa.temp scripts/pnglibconf.dfa
32
33# build the library.
34autoreconf -f -i
35./configure
36make -j$(nproc) clean
37make -j$(nproc) libpng16.la
38
39# build libpng_read_fuzzer.
40$CXX $CXXFLAGS -std=c++11 -I. \
41     $SRC/libpng/contrib/oss-fuzz/libpng_read_fuzzer.cc \
42     -o $OUT/libpng_read_fuzzer \
43     -lFuzzingEngine .libs/libpng16.a -lz
44
45# add seed corpus.
46find $SRC/libpng -name "*.png" | grep -v crashers | \
47     xargs zip $OUT/libpng_read_fuzzer_seed_corpus.zip
48
49cp $SRC/libpng/contrib/oss-fuzz/*.dict \
50     $SRC/libpng/contrib/oss-fuzz/*.options $OUT/
51