Re: Predefined defines on arm64-macOS

[Bruno Haible]

Thank you, Martin. Good to see that we can continue to use

  - defined __APPLE__ && defined __MACH__  to test for macOS >= 10,
  - defined __aarch64__                    to test for 64-bit ARM CPU.
  - defined __ARM_PCS_AAPCS64              for the function call convention.

Bruno