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build: turn on --enable-c++17 by --enable-fuzz

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Fuzzing code uses C++17 specific code (e.g. std::optional), so it is not
possible to compile with --enable-fuzz and without --enable-c++17.

Thus, turn on --enable-c++17 whenever --enable-fuzz is used.
This commit is contained in:
Vasil Dimov 2020-06-05 11:50:34 +02:00
parent 01b45b2e01
commit 0012471391
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GPG Key ID: 54DF06F64B55CBBF
4 changed files with 7 additions and 7 deletions
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2
ci/test/00_setup_env_native_fuzz.sh
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@ -14,4 +14,4 @@ export RUN_UNIT_TESTS=false
export RUN_FUNCTIONAL_TESTS=false
export RUN_FUZZ_TESTS=true
export GOAL="install"
export BITCOIN_CONFIG="--enable-fuzz --with-sanitizers=fuzzer,address,undefined --enable-c++17 CC=clang CXX=clang++"
export BITCOIN_CONFIG="--enable-fuzz --with-sanitizers=fuzzer,address,undefined CC=clang CXX=clang++"

2
ci/test/00_setup_env_native_fuzz_with_valgrind.sh
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@ -15,4 +15,4 @@ export RUN_FUNCTIONAL_TESTS=false
export RUN_FUZZ_TESTS=true
export FUZZ_TESTS_CONFIG="--valgrind"
export GOAL="install"
export BITCOIN_CONFIG="--enable-fuzz --with-sanitizers=fuzzer --enable-c++17 CC=clang CXX=clang++"
export BITCOIN_CONFIG="--enable-fuzz --with-sanitizers=fuzzer CC=clang CXX=clang++"

2
configure.ac
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@ -69,7 +69,7 @@ AC_ARG_ENABLE([c++17],
[use_cxx17=no])
dnl Require C++11 or C++17 compiler (no GNU extensions)
if test "x$use_cxx17" = xyes; then
if test "x$use_cxx17" = xyes -o "x$enable_fuzz" = xyes ; then
AX_CXX_COMPILE_STDCXX([17], [noext], [mandatory])
else
AX_CXX_COMPILE_STDCXX([11], [noext], [mandatory])

8
doc/fuzzing.md
View File

@ -8,7 +8,7 @@ To quickly get started fuzzing Bitcoin Core using [libFuzzer](https://llvm.org/d
$ git clone https://github.com/bitcoin/bitcoin
$ cd bitcoin/
$ ./autogen.sh
$ CC=clang CXX=clang++ ./configure --enable-fuzz --with-sanitizers=address,fuzzer,undefined --enable-c++17
$ CC=clang CXX=clang++ ./configure --enable-fuzz --with-sanitizers=address,fuzzer,undefined
# macOS users: If you have problem with this step then make sure to read "macOS hints for
# libFuzzer" on https://github.com/bitcoin/bitcoin/blob/master/doc/fuzzing.md#macos-hints-for-libfuzzer
$ make
@ -103,7 +103,7 @@ You may also need to take care of giving the correct path for `clang` and
Full configure that was tested on macOS Catalina with `brew` installed `llvm`:
```sh
./configure --enable-fuzz --with-sanitizers=fuzzer,address,undefined CC=/usr/local/opt/llvm/bin/clang CXX=/usr/local/opt/llvm/bin/clang++ --disable-asm --enable-c++17
./configure --enable-fuzz --with-sanitizers=fuzzer,address,undefined CC=/usr/local/opt/llvm/bin/clang CXX=/usr/local/opt/llvm/bin/clang++ --disable-asm
```
Read the [libFuzzer documentation](https://llvm.org/docs/LibFuzzer.html) for more information. This [libFuzzer tutorial](https://github.com/google/fuzzing/blob/master/tutorial/libFuzzerTutorial.md) might also be of interest.
@ -121,7 +121,7 @@ $ git clone https://github.com/google/afl
$ make -C afl/
$ make -C afl/llvm_mode/
$ ./autogen.sh
$ CC=$(pwd)/afl/afl-clang-fast CXX=$(pwd)/afl/afl-clang-fast++ ./configure --enable-fuzz --enable-c++17
$ CC=$(pwd)/afl/afl-clang-fast CXX=$(pwd)/afl/afl-clang-fast++ ./configure --enable-fuzz
$ make
# For macOS you may need to ignore x86 compilation checks when running "make". If so,
# try compiling using: AFL_NO_X86=1 make
@ -148,7 +148,7 @@ $ git clone https://github.com/google/honggfuzz
$ cd honggfuzz/
$ make
$ cd ..
$ CC=$(pwd)/honggfuzz/hfuzz_cc/hfuzz-clang CXX=$(pwd)/honggfuzz/hfuzz_cc/hfuzz-clang++ ./configure --enable-fuzz --with-sanitizers=address,undefined --enable-c++17
$ CC=$(pwd)/honggfuzz/hfuzz_cc/hfuzz-clang CXX=$(pwd)/honggfuzz/hfuzz_cc/hfuzz-clang++ ./configure --enable-fuzz --with-sanitizers=address,undefined
$ make
$ mkdir -p inputs/
$ honggfuzz/honggfuzz -i inputs/ -- src/test/fuzz/process_message