Update: To clarify: Since the new compiler does in fact work with new projects, the issue is not that my system is missing anything. Additionally, Xcode should not even be trying to find llvm-gcc as the whole point is that I switched from that compiler to the new one, Clang llvm The results are in! See what nearly 90, developers picked as their most loved, dreaded, and desired coding languages and more in the Developer Survey. Not a problem in its own right, but not very convenient, especially when compared to other platforms: apt-get install clang, brew install llvm --with-clang --with-asan, etc. So over the last month I tried to come up with a reliable tutorial to get clang to compile and link on .