Ruby 1.9.3 has some issues building with LLVM (as opposed to GCC), and
while in some cases it seems like making symbolic link changes or giving
config options like --with-gcc=clang makes building 1.9.3 with LLVM
work, it’s still somewhat messy. Does anyone know if Ruby will
officially support LLVM moving forward?
This is primarily an issue for Mac users right now (as Apple now ships
LLVM as the default compiler as of Xcode 4.2), but LLVM is by no means
restricted to use on Macs.