title: Why is /usr/bin/arch not installed?
body: <p>My application has been depending on the presence of <code>/usr/bin/arch</code>, and it was my understanding that this was part of the standard Mac OS X installation. It's there if I install Snow Leopard from the DVD, without installing the developer tools. However, I've now encountered two users with 10.6.7 who are missing this file. Is there a normal way of getting Mac OS X that omits <code>arch</code>? Or do these users' installations just happen to be broken?</p>