arch(1) on macOS
The text 20d398bffd5d, as macOS 10.15.6, macOS 10.15.5, macOS 10.15.4, macOS 10.15.3, macOS 10.15.2, macOS 10.15.1, macOS 10.15 shipped it.
print architecture type or run selected architecture of a universal binary
Flags it lists
-
-32 -
-64 -
-c -
-d -
-e -
-h