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lib_libc++/clang/15.0.7/lib/x86_64-linux
lib_libc++/clang/15.0.7/lib/x86_64-linux
 
 
CMakeLists.txt
CMakeLists.txt
 
 
README.md
README.md
 
 

README.md

This contains the LLVM libFuzzer fuzzing engine. This has been compiled for linux-x86_64 architecture. This has been linked against the libc++ and libc++abi libraries.

To re-compile, run the following commands:

    git clone --branch llvmorg-15.0.7 --single-branch https://github.com/llvm/llvm-project.git
    cd llvm-project
    cmake -S llvm -B build -DLLVM_ENABLE_PROJECTS="clang" -DLLVM_ENABLE_RUNTIMES="libcxx;libcxxabi;compiler-rt" -DCOMPILER_RT_BUILD_LIBFUZZER=ON -DCMAKE_BUILD_TYPE=RelWithDebInfo -DCMAKE_TOOLCHAIN_FILE=../silkworm/cmake/toolchain/clang_libcxx.cmake
    cmake --build build

The problem with the standard build delivered by the compiler_install.sh is that the libFuzzer is linked against the libstdc++ library. This is not compatible with the libc++ library used by the Silkworm project. Therefore, we need to re-compile the libFuzzer library. To prevent the lengthy recompliation of the whole LLVM project, we deliver the pre-compiled libFuzzer library in this repository.

The similar issue has been in google/oss-fuzz#2328.