remove the "-unreg" flag and the unregisterised way, see #1008

compiler/main/StaticFlags.hs

@@ -159,7 +159,6 @@ static_flags = [
 
 	------- ways --------------------------------------------------------
   ,  ( "prof"		, NoArg (addWay WayProf) )
-  ,  ( "unreg"		, NoArg (addWay WayUnreg) )
   ,  ( "ticky"		, NoArg (addWay WayTicky) )
   ,  ( "parallel"	, NoArg (addWay WayPar) )
   ,  ( "gransim"	, NoArg (addWay WayGran) )
@@ -455,7 +454,6 @@ data WayName
   = WayThreaded
   | WayDebug
   | WayProf
-  | WayUnreg
   | WayTicky
   | WayPar
   | WayGran
@@ -492,7 +490,6 @@ allowed_combination way = and [ x `allowedWith` y
 	_ `allowedWith` WayDebug		= True
 	WayDebug `allowedWith` _		= True
 
-	WayProf `allowedWith` WayUnreg		= True
 	WayProf `allowedWith` WayNDP		= True
 	_ `allowedWith` _ 			= False
 
@@ -562,9 +559,6 @@ way_details =
 	[ "-DTICKY_TICKY"
 	, "-optc-DTICKY_TICKY" ]),
 
-    (WayUnreg, Way  "u" False "Unregisterised" 
-	unregFlags ),
-
     -- optl's below to tell linker where to find the PVM library -- HWL
     (WayPar, Way  "mp" False "Parallel" 
 	[ "-fparallel"

docs/users_guide/debugging.xml

@@ -601,21 +601,9 @@ Main.skip2{-r1L6-} =
     of platform-specific code that needs to be written in order to get
     unregisterised compilation going is usually fairly small.</para>
 
-    <variablelist>
-      <varlistentry>
-	<term>
-          <option>-unreg</option>:
-          <indexterm><primary><option>-unreg</option></primary></indexterm>
-        </term>
-	<listitem>
-	  <para>Compile via vanilla ANSI C only, turning off
-	  platform-specific optimisations.  NOTE: in order to use
-	  <option>-unreg</option>, you need to have a set of libraries
-	  (including the RTS) built for unregisterised compilation.
-	  This amounts to building GHC with way "u" enabled.</para>
-	</listitem>
-      </varlistentry>
-    </variablelist>
+   <para>Unregisterised compilation cannot be selected at
+   compile-time; you have to build GHC with the appropriate options
+   set.  Consult the GHC Building Guide for details.</para>
   </sect2>
 
 </sect1>

docs/users_guide/flags.xml

@@ -2222,12 +2222,6 @@
 	      <entry>dynamic</entry>
 	      <entry>-</entry>
 	    </row>
-	    <row>
-	      <entry><option>-unreg</option></entry>
-	      <entry>Enable unregisterised compilation</entry>
-	      <entry>static</entry>
-	      <entry>-</entry>
-	    </row>
 	  </tbody>
 	</tgroup>
       </informaltable>