X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=docs%2Fusers_guide%2Fdebugging.xml;h=513b26fc2814bcc1c6fbf30ac0cd2ed3107b0976;hb=023b31fe82746b937ab0eba78b11559be782ebcf;hp=638ab7a4b50d732352fa82a0db4caefe7100a8d1;hpb=368f9fc139a24b771b5b3282753544fb087f6b55;p=ghc-hetmet.git

diff --git a/docs/users_guide/debugging.xml b/docs/users_guide/debugging.xml
index 638ab7a..513b26f 100644
--- a/docs/users_guide/debugging.xml
+++ b/docs/users_guide/debugging.xml
@@ -120,8 +120,9 @@
                 <indexterm><primary><option>-ddump-rules</option></primary></indexterm>
 	      </term>
 	      <listitem>
-		<para>dumps all rewrite rules (including those generated
-	      by the specialisation pass)</para>
+		<para>dumps all rewrite rules specified in this module; 
+                      see <xref linkend="controlling-rules"/>.
+                </para>
 	      </listitem>
 	    </varlistentry>
 
@@ -423,6 +424,31 @@
 
       <varlistentry>
 	<term>
+          <option>-dsuppress-uniques</option>
+          <indexterm><primary><option>-dsuppress-uniques</option></primary></indexterm>
+        </term>
+	<listitem>
+	  <para>Suppress the printing of uniques in debugging output. This may make 
+	  the printout ambiguous (e.g. unclear where an occurrence of 'x' is bound), but
+	  it makes the output of two compiler runs have many fewer gratuitous differences,
+	    so you can realistically apply <command>diff</command>.  Once <command>diff</command>
+	  has shown you where to look, you can try again without <option>-dsuppress-uniques</option></para>
+	</listitem>
+      </varlistentry>
+
+      <varlistentry>
+	<term>
+          <option>-dsuppress-coercions</option>
+          <indexterm><primary><option>-dsuppress-coercions</option></primary></indexterm>
+        </term>
+	<listitem>
+          <para>Suppress the printing of coercions in Core dumps to make them
+shorter.</para>
+	</listitem>
+      </varlistentry>
+
+      <varlistentry>
+	<term>
           <option>-dppr-user-length</option>
           <indexterm><primary><option>-dppr-user-length</option></primary></indexterm>
         </term>
@@ -435,14 +461,18 @@
       </varlistentry>
 
       <varlistentry>
-	<term>
-          <option>-dshow-unused-imports</option>
-          <indexterm><primary><option>-dshow-unused-imports</option></primary></indexterm>
+        <term>
+          <option>-dno-debug-output</option>
+          <indexterm><primary><option>-dno-debug-output</option></primary></indexterm>
         </term>
-	<listitem>
-	  <para>Have the renamer report what imports does not
-	contribute.</para>
-	</listitem>
+        <listitem>
+          <para>Suppress any unsolicited debugging output.  When GHC
+            has been built with the <literal>DEBUG</literal> option it
+            occasionally emits debug output of interest to developers.
+            The extra output can confuse the testing framework and
+            cause bogus test failures, so this flag is provided to
+            turn it off.</para>
+        </listitem>
       </varlistentry>
     </variablelist>
   </sect2>