1# Running the fuzzers locally 2 3There is a [helper script](build.sh) to build the fuzzers, which has only been 4tested on Debian and Ubuntu linux so far. There should be no problems fuzzing on 5Windows (using clang>=8) or on Mac, but the script will probably not work out of 6the box. 7 8Something along 9```sh 10mkdir build 11cd build 12export CXX=clang++ 13export CXXFLAGS="-fsanitize=fuzzer-no-link -DFUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION= -g" 14cmake .. -DFMT_SAFE_DURATION_CAST=On -DFMT_FUZZ=On -DFMT_FUZZ_LINKMAIN=Off -DFMT_FUZZ_LDFLAGS="-fsanitize=fuzzer" 15cmake --build . 16``` 17should work to build the fuzzers for all platforms which clang supports. 18 19Execute a fuzzer with for instance 20```sh 21cd build 22export UBSAN_OPTIONS=halt_on_error=1 23mkdir out_chrono 24bin/fuzzer_chrono_duration out_chrono 25``` 26