julia

1823a4d2 - Use `apple-m1` as the base march for `aarch64-apple-darwin` (#44347)

Use `apple-m1` as the base march for `aarch64-apple-darwin` (#44347) Since the Apple devkits are all presumably returned to Apple at this point, it doesn't make sense to continue to build for the earlier a12 model, we should just build for the M1 explicitly. LLVM supports `-mcpu=apple-m1` since LLVM 13.0.0-rc1 [0]. Clang 13 (ships with Xcode 13) understands this, so it's a safe bet that this can be used with the C compiler that is generating this code as well. [0] https://github.com/llvm/llvm-project/commit/a8a3a43792472c9775c60fa79b9357033d47ce40