+ <sect3 id="finding-header-files">
+ <title>Finding Header files</title>
+
+ <para>Header files named by the <option>-#include</option>
+ option or in a <literal>foreign import</literal> declaration
+ are searched for using the C compiler's usual search path.
+ You can add directories to this search path using the
+ <option>-I</option> option (see <xref
+ linkend="c-pre-processor">).</para>
+
+ <para>Note: header files are ignored unless compiling via C.
+ If you had been compiling your code using the native code
+ generator (the default) and suddenly switch to compiling via
+ C, then you can get unexpected errors about missing include
+ files. Compiling via C is enabled automatically when certain
+ options are given (eg. <option>-O</option> and
+ <option>-prof</option> both enable
+ <option>-fvia-C</option>).</para>
+ </sect3>
+