Four more arguments I forgot: * Apple also uses Clang snapshots and even distributes them with their SDK - so much about the stability of snapshots. * All OS X software is compiled with Clang - yes, the Clang snapshot that comes with the SDK! * FreeBSD 10 is also Clang-only without any problem * If you allow to use any installed Clang, it means you will also test Haiku with Clang from trunk and thus *if* there is a problem realize it early enough to fix it → we can make sure a Clang release never breaks for Haiku, meaning a new Clang release will *never* break, completely eliminating the need to require a specific version. Therefore version x.y or up will be fine and there's no need to always build a bundled Clang. -- Jonathan