A standalone fork of libunwind from the llvm-project. Except for the root directory's CMakeLists.txt (and its auxiliary cmake module ./cmake/custom.cmake), all other files are 100% sourced from the upstream repository without any modifications. The root directory's CMakeLists.txt provides customized modifications to the upstream libunwind, enabling users to seamlessly integrate this libunwind from llvm-project into any CMake project without requiring code alterations.
The unwind library provides a family of _Unwind_* functions implementing the language-neutral stack unwinding portion of the Itanium C++ ABI (Level I). It is a dependency of the C++ ABI library, and sometimes is a dependency of other runtimes.
LLVM’s unwinder library is part of the llvm-project git repository.
More: libunwind LLVM Unwinder