If you are going to list architectures supported, also list the ones gcc supports - it's, basically, all of them.
Llvm+clang is nice, but not better, drink the kool aid. Gcc performance is still higher, and gcc is free software.
>Freedom 3 includes the freedom to release your modified versions as free software. A free license may also permit other ways of releasing them; in other words, it does not have to be a copyleft license. However, a license that requires modified versions to be nonfree does not qualify as a free license.