Is it to the point that clang is a simple installer, and we could default 2010 to use it as long as it's in a default location or PATH or whatever? We should probably update our README soon once the compiling options get sorted out on various platforms.
Also, we found a bug in the Apple clang with Xcode 5.1.1 which is the last version for OS X 10.8. I will be seeing if it's fixed in Xcode 6.x soon,but dropping in an alternative clang compiler for Xcode could get us AddressSanitizer support on OS X too. Apple has left that unavailable by default so far.