kongr45gpen / llvm-project

LLVM fork with support for Reflection

LLVM with Reflection

A fork of llvm/llvm-project with reflection features added to Clang.

Originally implemented in matus-chochlik/llvm-project. llvm version updated to 17 in kongr45gpen/llvm-project.

Installation

Follow the original LLVM building instructions.

The following pipeline is suggested for this repository:

# You can add --depth=1 to make the clone slightly faster
git clone https://github.com/kongr45gpen/llvm-project.git
cd llvm-project
cmake -S llvm -B build -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Release -DLLVM_ENABLE_PROJECTS="clang" -DLLVM_ENABLE_RUNTIMES="libcxx;libcxxabi" -DLLVM_TARGETS_TO_BUILD=X86
cmake --build build -- -j 8 clang # 8 parallel jobs

After running this:

• The clang++ toolchain should be available in build/bin
• The libcxx implementation of the standard library will be available in build/libcxx

Compiling

To compile with a reflection-enabled compiler and all modern C++ features, you need to make sure to include the correct compiler file, and standard C++ library. Make sure to include the proper command line arguments to enable reflection and reflection extensions as well:

/path/to/llvm-project/build/bin/clang++ -freflection-ts -freflection-ext -stdlib=libc++

To link with libcxx dynamically, add it to your LD_LIBRARY_PATH:

LD_LIBRARY_PATH="/path/to/llvm-project/build/lib/x86_64-linux-gnu"

To link with libcxx statically, add the following arguments:

-static -lc++abi -fuse-ld=lld

Example

See kongr45gpen/ok-serializer for an example project of this.