Add support for macOS 11 and Apple Silicon systems. | |
It is now possible to build "Universal 2" binaries using | |
"--enable-universalsdk --with-universal-archs=universal2". | |
Binaries build on later macOS versions can be deployed back to older | |
versions (tested up to macOS 10.9), when using the correct deployment | |
target. This is tested using Xcode 11 and later. |