Worked on enhancing the stability and portability of ARM64 builds for the llama.cpp and ggml repositories, focusing on cross-compilation challenges specific to Ubuntu 20.04 environments. Addressed issues with CPU flag detection by refining CMake-based build scripts to ensure correct compilation flags were set for both GCC 9 and GCC 12 toolchains, thereby preventing failures related to extended instruction sets. The updates aligned CPU flag detection mechanisms across both repositories, streamlining maintenance and enabling more reliable, portable builds. Leveraged expertise in CMake, CPU architecture, and cross-compilation to reduce platform-specific build errors and support broader deployment scenarios for ARM64 systems.