Well, LLVM doesn't work well on SPARC yet, so anyone on a SPARC-based system would be affected (yes, I know the number of people running FireFox on SPARC is rel

Well, LLVM doesn't work well on SPARC yet, so anyone on a SPARC-based system would be affected (yes, I know the number of people running FireFox on SPARC is relatively small, although it certainly numbers in the thousands). And until recently, as another example, rust didn't quite work yet on Solaris (amd64); thankfully, a community member stepped up and has been actively working on that port.