Worked on enhancing the build system for the EsotericSoftware/spine-runtimes repository by introducing a configurable mechanism for compiler flags using CMake. Developed the SPINE_SET_COMPILER_FLAGS option, allowing users to opt in to custom compiler flag settings tailored to their specific environments, which improved cross-platform compatibility and reduced friction in CI pipelines. Addressed a related syntax issue in the CMake configuration to ensure reliable flag processing when the new option is enabled. Demonstrated skills in build system configuration, CMake scripting, and collaborative patch management, resulting in a more portable and user-friendly build process for diverse development and integration scenarios.