> the whole FB C++ build experience was fairly primitive and even worse for iOS/Android Flatly untrue, on iOS much of the infrastructure was well ahead of what

> the whole FB C++ build experience was fairly primitive and even worse for iOS/Android Flatly untrue, on iOS much of the infrastructure was well ahead of what anyone else had aside from Google. It worked so well that a tooling team responsible for upgrading to a new version of Xcode soon after its released declared victory and took credit for the compiler upgrade, as this had been an issue in past years. They hadn't realized that a compiler team had been quietly running their builds company-wide for nearly two years and fixing compiler bugs on the bleeding edge of clang/llvm the whole time, so by the time the compiler was branched for Xcode and released from Apple, the fixes were already complete, open-sourced, and merged fully upstream.