title: Declaration of ‘setxattr’ must be imported from module ‘Darwin.POSIX.sys.xattr’ before it is required
body: <p>code is working fine on armv7 but compile for arm64 throws this "Declaration of ‘setxattr’ must be imported from module ‘Darwin.POSIX.sys.xattr’ before it is required" error.</p>
  
  <pre><code>u_int8_t b = 1;
      setxattr([path fileSystemRepresentation],
               "com.apple.MobileBackup", &amp;b, 1, 0, 0);
  </code></pre>
  
  <p>any help plz?</p>