LLVM: how are pre-built binaries at http://llvm.org/releases/ built?

Hi,

I find the pre-built binaries at http://llvm.org/releases very useful. Is there a script available anywhere that does the build, so that I can get a binary built in the very same way, but for a platform not included? (I would like llvm+clang for FC20, something like http://llvm.org/releases/3\.6\.1/clang\+llvm\-3\.6\.1\-x86\_64\-fedora21\.tar\.xz but for FC20)

Thanks!
Tomas

http://llvm.org/docs/ReleaseProcess.html

I find that with -no-64bit on Ubuntu I still get 64bit binaries, which is weird. Without it, you get two builds, both 64bit, but IIRC, not identical.

Ben