Trevor L. McDonell

I'm still on 10.14 but I'll see if I can find a 10.15 box to try it on. The `-DLLVM_BUILD_EXTERNAL_COMPILER_RT` flag was required to fix some other problem a long...

llvm-3.7 is extremely old, I'm not sure if it is supported on this version of Xcode, or if it is some problem that can be fixed with the homebrew configuration...

Might be the same problem as #17 but I haven't had a chance to try it out yet (completely forgot, actually)

I need to get access to an apple silicon Mac to update the formula, but do indeed plan to fix this...