In addition to what eatsfoobars said, you can also use attributes for conditional compilation depending on a number of things (pointer size, platform, etc.) e.g

In addition to what eatsfoobars said, you can also use attributes for conditional compilation depending on a number of things (pointer size, platform, etc.) e.g., https://github.com/BurntSushi/walkdir/blob/master/src/same_file.rs#L19-L37 https://github.com/BurntSushi/walkdir/blob/master/src/same_f...