Worked on the espressif/llvm-project repository to deliver a critical cross-platform bug fix for the -print-library-module-manifest-path command. Addressed discrepancies in module manifest path resolution between macOS and Linux by implementing platform-agnostic file search logic in C++. Enhanced the build system to ensure reliable discovery of module manifests regardless of operating system, thereby stabilizing developer workflows and continuous integration processes. Added automated tests to verify the correctness of the cross-platform solution, ensuring ongoing reliability. Focused on compiler development and cross-platform compatibility, this work improved the robustness of the toolchain without introducing new features during the reported period.