<option>-Xblah</option>, or by a <literal>{-# LANGUAGE blah #-}</literal>
pragma in the file itself. See <xref linkend="options-language"/></para>
<option>-Xblah</option>, or by a <literal>{-# LANGUAGE blah #-}</literal>
pragma in the file itself. See <xref linkend="options-language"/></para>