message: Ignore other platforms instead of using only-linux
diff: -// only-linux: Uses Linux-only APIs
  -
  +// Unfortunately, compiletest_rs does not support 'only-linux',
  +// so we need to ignore Windows and OS X instead
  +// ignore-macos: Uses Linux-only APIs
  +// ignore-windows: Uses Linux-only APIs
  #![feature(rustc_private)]
  extern crate libc;
  