Worked on the facebook/folly repository to address Android build compatibility issues by updating StripedThrottledLifoSem.cpp. The solution involved migrating from a bare DEFINE_uint64 to the portable FOLLY_GFLAGS_DEFINE_uint64 macro, ensuring builds succeed even when gflags is unavailable. This approach aligned with Folly’s cross-platform portability strategy and provided necessary fallbacks for Android environments. The change stabilized builds for downstream modules, such as folly/executors, reducing flaky continuous integration failures and supporting consistent cross-platform releases. The work was implemented in C++ with a focus on Android development and cross-platform compatibility, and was reviewed and merged following Folly’s established code review process.