Mention that the module sub-directory structure for .o and .hi files is created autom...

diff --git a/docs/users_guide/separate_compilation.xml b/docs/users_guide/separate_compilation.xml
index 076af6e..d0f83a3 100644 (file)
--- a/docs/users_guide/separate_compilation.xml
+++ b/docs/users_guide/separate_compilation.xml
@@ -114,7 +114,9 @@
          has been specified, then the object filename is
          <replaceable>dir</replaceable>/<replaceable>mod</replaceable>.<replaceable>osuf</replaceable>,
          where <replaceable>mod</replaceable> is the module name with
-         dots replaced by slashes.</para>
+         dots replaced by slashes.  GHC will silently create the necessary directory 
+          structure underneath <replaceable>dir</replaceable>, if it does not
+          already exist.</para> 
        </listitem>
       </itemizedlist>