I'm looking for a repository that would have RPM packages for recent 
versions of clang and llvm, for installing under SL7.  I've found Red 
Hat software collections, but they seem to want you to use 
subscription-manager.  There are apparently also install instructions 
for CentOS, but I'm not sure how to get the same repos to work in SL.

Before I spend a lot of time trying to get this to work, I thought I'd 
check with the SL experts here, since I'm assuming someone will have 
already done this and have recommendations.

What is the best/simplest way to get recent clang and llvm on SL7?

Thanks,
Gilbert