Worked on stabilizing the build system for the python/cpython repository by addressing issues with compiler detection during configuration. Focused on improving the reliability of locating the g++ compiler, the developer modified the build configuration scripts to remove a duplicated argument in AC_PATH_TOOL and ensured that the system PATH was properly honored. This fix, implemented using shell scripting and C++ development skills, resolved build failures caused by incorrect compiler selection, particularly in continuous integration and diverse developer environments. The changes enhanced the robustness of the build process, reducing the likelihood of mis-detection and improving overall CI stability for the project.