macOS has fat binary dylibs with executable code for multiple architectures. When cross-compiling between macOS on x86 and ARM, all system libraries are usable on both architectures, including libz.1.dylib.
The current logic gives up on system zlib when target != host, which causes unnecessary static linking when the target and host are x86_64-apple-darwin and aarch64-apple-darwin.
macOS has fat binary dylibs with executable code for multiple architectures. When cross-compiling between macOS on x86 and ARM, all system libraries are usable on both architectures, including libz.1.dylib.
The current logic gives up on system zlib when
target != host, which causes unnecessary static linking when the target and host arex86_64-apple-darwinandaarch64-apple-darwin.