Okay this is scary but it is just adding a configure option to disable

* HTMLtree.c SAX2.c c14n.c catalog.c configure.in debugXML.c
  encoding.c entities.c nanoftp.c nanohttp.c parser.c relaxng.c
  testAutomata.c testC14N.c testHTML.c testRegexp.c testRelax.c
  testSchemas.c testXPath.c threads.c tree.c valid.c xmlIO.c
  xmlcatalog.c xmllint.c xmlmemory.c xmlreader.c xmlschemas.c
  example/gjobread.c include/libxml/HTMLtree.h include/libxml/c14n.h
  include/libxml/catalog.h include/libxml/debugXML.h
  include/libxml/entities.h include/libxml/nanohttp.h
  include/libxml/relaxng.h include/libxml/tree.h
  include/libxml/valid.h include/libxml/xmlIO.h
  include/libxml/xmlschemas.h include/libxml/xmlversion.h.in
  include/libxml/xpathInternals.h python/libxml.c:
  Okay this is scary but it is just adding a configure option
  to disable output, this touches most of the files.
Daniel
diff --git a/include/libxml/HTMLtree.h b/include/libxml/HTMLtree.h
index c40df38..832c7c8 100644
--- a/include/libxml/HTMLtree.h
+++ b/include/libxml/HTMLtree.h
@@ -68,6 +68,7 @@
 XMLPUBFUN int XMLCALL		
 		htmlSetMetaEncoding	(htmlDocPtr doc,
 					 const xmlChar *encoding);
+#ifdef LIBXML_OUTPUT_ENABLED
 XMLPUBFUN void XMLCALL	    
 		htmlDocDumpMemory	(xmlDocPtr cur,
 					 xmlChar **mem,
@@ -117,16 +118,16 @@
 					 xmlDocPtr cur,
 					 const char *encoding,
 					 int format);
-
-XMLPUBFUN int XMLCALL		
-		htmlIsBooleanAttr	(const xmlChar *name);
 XMLPUBFUN void XMLCALL 
 		htmlNodeDumpOutput	(xmlOutputBufferPtr buf, 
 					 xmlDocPtr doc,
 					 xmlNodePtr cur, 
 					 const char *encoding);
 
+#endif /* LIBXML_OUTPUT_ENABLED */
 
+XMLPUBFUN int XMLCALL		
+		htmlIsBooleanAttr	(const xmlChar *name);
 
 
 #ifdef __cplusplus