Worked on the PX4/PX4-Autopilot repository to enhance build stability across multiple configurations by addressing a specific compilation issue. Introduced a conditional compilation guard for the updateTerrainResetStatus function, ensuring that the codebase compiles successfully even when the CONFIG_EKF2_TERRAIN option is not defined. This targeted fix, implemented in C++ within an embedded systems context, reduced configuration-specific build failures and improved the reliability of continuous integration processes. The solution required minimal code changes while maintaining feature parity, resulting in smoother integrations and lower maintenance overhead for the project. Focus remained on robust, maintainable code and clear communication with maintainers.