[dbaupp]

> Oh? I'd love to see that compiling on a different operating system.

You'll note from the file paths in the blog post ("file:///Users/ykatz/...") that the builds are actually being run on a OSX machine: winapi is careful to not break builds when it is irrelevant.

It is possible and even necessary to write code that depends on operating system details (e.g. to implement the high-level cross-platform code), and indeed that code may not compile on different platforms. The point is that rustc and cargo together provide the tools to make it possible and easy to write code that builds and runs everywhere everywhere, they don't/can't/shouldn't guarantee it.