问题
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].
回答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.
回答2:
You should check the Rust Reference chapter on conditional compilation:
target_arch = "..."- Target CPU architecture, such as"x86","x86_64","mips","powerpc","powerpc64","arm", or"aarch64". This value is closely related to the first element of the platform target triple, though it is not identical.
来源：https://stackoverflow.com/questions/41896462/how-to-check-in-rust-if-architecture-is-32-or-64-bit