When you want to compile for native windows with clang + msvc. Of course this can be disabled, but people like to have everything ready. These are available on the github release page.
Busted Mugshots and Arrest Records of the Famous and Infamous
When compiling, you have to pass some new flags to let clang know that you want to use the gnu compiler collection (gcc) instead of msvc.
Clang is also provided in all major bsd or gnu/linux distributions.
For any other variants of platform and architecture, check the full list of release packages at the bottom of this release page. Download the latest release is clang 3.3 (august 2013). Users can easily download and install the clang compiler. By default, it uses the visual studio (msvc) toolchain as backend on windows (for linking, runtime, etc).
Mac os x clang is the default. The easiest way to get started with clang is to download a packaged version as outlined below. Download and install using the default settings. In this article we will see that you can install clang/clang++ on windows with a single command.