While due to Rosetta fizzy will just work on macOS, it would make sense considering supporting dual-binary builds with Apple Silicon.

From https://developer.apple.com/documentation/apple_silicon/addressing_architectural_differences_in_your_macos_code:

But probably stdc++ hides this difference for us.

CMake features: https://cmake.org/cmake/help/latest/envvar/CMAKE_APPLE_SILICON_PROCESSOR.html and https://cmake.org/cmake/help/latest/variable/CMAKE_OSX_ARCHITECTURES.html

And a helpful tip (from https://cutecoder.org/software/detecting-apple-silicon-shell-script/) to force architecture selection: arch -arm64 fizzy-bench