+<para>If you use the flag <option>-fwarn-orphans</option>, GHC will warn you
+if you are creating an orphan module.
+Like any warning, you can switch the warning off with <option>-fno-warn-orphans</option>,
+and <option>-Werror</option>
+will make the compilation fail if the warning is issued.
+</para>
+<para>