During July 2025, Techflash focused on enhancing cross-CPU portability in the libsdl-org/SDL repository by addressing a regression related to compiler auto-vectorization of AltiVec code. Using CMake and compiler optimization techniques, Techflash implemented a build-time safeguard that disables AltiVec auto-vectorization on PowerPC architectures, ensuring that GCC and Clang do not inject unintended instructions into non-AltiVec code paths. This solution preserved existing AltiVec-specific optimizations while maintaining correct behavior across diverse hardware. The work included updates to documentation and build configuration, reflecting a careful approach to cross-platform development and a deep understanding of portability challenges in CMake-based projects.