X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fdocs%2Fusers_guide%2Ffaq.sgml;h=beda1cb7c6c984aae01af1dba94f04b8e2e3a305;hb=dc6afe4242238aa1a7a5d3a150a346d23dd6ea22;hp=25bf69472e1b7684000bfacc4c22a637620df5a5;hpb=2c556fae8314b3b36f031529d018f4f722c2caf2;p=ghc-hetmet.git

diff --git a/ghc/docs/users_guide/faq.sgml b/ghc/docs/users_guide/faq.sgml
index 25bf694..beda1cb 100644
--- a/ghc/docs/users_guide/faq.sgml
+++ b/ghc/docs/users_guide/faq.sgml
@@ -156,6 +156,17 @@
     </varlistentry>
     
     <varlistentry>
+      <term>The build fails in readline.</term>
+      <listitem>
+	<para>It has been reported that if you have multiple versions
+	of the readline library installed on Linux, then this may
+	cause the build to fail.  If you have multiple versions of
+	readline, try uninstalling all except the most recent
+	version.</para>
+      </listitem>
+    </varlistentry>
+
+    <varlistentry>
       <term>When I try to start ghci (probably one I compiled myself)
       it says <literal>ghc-5.02: not built for interactive
       use</literal></term>
@@ -419,7 +430,26 @@ details.</para>
       </listitem>
     </varlistentry>
 
+    <varlistentry>
+      <term>How do I compile my program for profiling without
+      overwriting the object files and <literal>hi</literal> files
+      I've already built?</term>
+      <listitem>
+	<para>You can select alternative suffixes for object files and
+	interface files, so you can have several builds of the same
+	code coexisting in the same directory.  For example, to
+	compile with profiling, you might do this:</para>
+	
+	<screen>ghc --make -prof -o foo-prof -osuf p.o -hisuf p.hi Main</screen>
+	
+	<para>See <xref linkend="options-output"> for more details on
+	the <option>-osuf</option> and <option>-hisuf</option>
+	options.</para>
+      </listitem>
+    </varlistentry>
+
   </variablelist>
+
 </chapter>