Worked on the espressif/llvm-project repository to enhance cross-platform build stability by addressing a compilation issue specific to FreeBSD systems. The solution involved casting the return value of the backtrace function to an integer, resolving a type mismatch that previously caused build failures. This targeted debugging effort improved CI reliability and ensured platform parity for FreeBSD users working with LLVM tooling. The work demonstrated proficiency in C++ and build systems, with careful attention to patch hygiene and type handling. By focusing on a critical bug fix rather than feature development, the contribution directly reduced build-time errors and improved developer experience across platforms.