processor - How to check in Rust if architecture is 32 or 64 bit?

Question

If there a conditional check for whether processor is 32-bit or 64-bit? I'm looking for kind of configuration check like e.g. #cfg[x86] or cfg[x64].

Answer 1

The #[cfg(target_pointer_width = "64")] from the cfg section in the Rust reference seems like a likely solution. It is based on the size of a pointer (as well as isize and usize), which should correspond to the architecture.