We need to rename the existing LLVM profiles to stop people using them when they "just" want to use an LLVM toolchain, not realising they're losing ABI compatibility (see bug 944478). Such profiles will require gcc as they will use libstdc++. Do we want to even have such profiles? Is there a point? How do we justify having such profiles (we wouldn't have a profile for different non-ABI breaking CFLAGS, for example)? I suppose there's value in having LLVM profiles which allow people to enable using clang, or maybe there isn't and we should just tell people to set it manually instead. The issue being that if we're using libstdc++, people can't depclean gcc, so the value of it is questionable (not useless, but it's not definitely valuable either). Thoughts?
