Worked on enhancing the build reliability of the facebook/jemalloc repository by improving the detection of strerror_r failures during the build process. Focused on the build system and C/C++ build tools, the approach involved adding a dedicated compilation test using Shell scripting to accurately distinguish between genuine strerror_r failures and system-related issues. This refinement prevented false positives in the test suite, leading to more stable continuous integration runs and reducing unnecessary debugging efforts. The changes strengthened cross-platform test reliability and accelerated release readiness, reflecting a careful and targeted engineering effort to improve the correctness and maintainability of the build configuration.