2 # Copyright 2017-2018 Glenn Randers-Pehrson
3 # Copyright 2016 Google Inc.
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
9 # http://www.apache.org/licenses/LICENSE-2.0
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.
17 # Last changed in libpng 1.6.35 [July 15, 2018]
19 # Revisions by Glenn Randers-Pehrson, 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 # 3. Build zlib alongside libpng
24 ################################################################################
26 # Disable logging via library build configuration control.
27 cat scripts/pnglibconf.dfa | \
28 sed -e "s/option STDIO/option STDIO disabled/" \
29 -e "s/option WARNING /option WARNING disabled/" \
30 -e "s/option WRITE enables WRITE_INT_FUNCTIONS/option WRITE disabled/" \
31 > scripts/pnglibconf.dfa.temp
32 mv scripts/pnglibconf.dfa.temp scripts/pnglibconf.dfa
34 # build the libpng library.
36 ./configure --with-libpng-prefix=OSS_FUZZ_
38 make -j$(nproc) libpng16.la
40 # build libpng_read_fuzzer.
41 $CXX $CXXFLAGS -std=c++11 -I. \
42 $SRC/libpng/contrib/oss-fuzz/libpng_read_fuzzer.cc \
43 -o $OUT/libpng_read_fuzzer \
44 -lFuzzingEngine .libs/libpng16.a -lz
47 find $SRC/libpng -name "*.png" | grep -v crashers | \
48 xargs zip $OUT/libpng_read_fuzzer_seed_corpus.zip
50 cp $SRC/libpng/contrib/oss-fuzz/*.dict \
51 $SRC/libpng/contrib/oss-fuzz/*.options $OUT/