diff --git a/testSAX.c b/testSAX.c
index ff96e4b..51def37 100644
--- a/testSAX.c
+++ b/testSAX.c
@@ -44,6 +44,18 @@
 #include <libxml/debugXML.h>
 #include <libxml/xmlmemory.h>
 
+/************************************************************************
+ *									*
+ * 		When running GCC in vaacum cleaner mode			*
+ *									*
+ ************************************************************************/
+
+#ifdef __GNUC__
+#define UNUSED __attribute__((__unused__))
+#else
+#define UNUSED
+#endif
+
 static int debug = 0;
 static int copy = 0;
 static int recovery = 0;
@@ -77,6 +89,7 @@
     NULL, /* xmlParserError */
     NULL, /* getParameterEntity */
     NULL, /* cdataBlock; */
+    NULL  /* externalSubset; */
 };
 
 xmlSAXHandlerPtr emptySAXHandler = &emptySAXHandlerStruct;
@@ -96,8 +109,8 @@
  *
  * Returns 1 if true
  */
-int
-isStandaloneDebug(void *ctx)
+static int
+isStandaloneDebug(void *ctx UNUSED)
 {
     fprintf(stdout, "SAX.isStandalone()\n");
     return(0);
@@ -111,8 +124,8 @@
  *
  * Returns 1 if true
  */
-int
-hasInternalSubsetDebug(void *ctx)
+static int
+hasInternalSubsetDebug(void *ctx UNUSED)
 {
     fprintf(stdout, "SAX.hasInternalSubset()\n");
     return(0);
@@ -126,8 +139,8 @@
  *
  * Returns 1 if true
  */
-int
-hasExternalSubsetDebug(void *ctx)
+static int
+hasExternalSubsetDebug(void *ctx UNUSED)
 {
     fprintf(stdout, "SAX.hasExternalSubset()\n");
     return(0);
@@ -139,8 +152,8 @@
  *
  * Does this document has an internal subset
  */
-void
-internalSubsetDebug(void *ctx, const xmlChar *name,
+static void
+internalSubsetDebug(void *ctx UNUSED, const xmlChar *name,
 	       const xmlChar *ExternalID, const xmlChar *SystemID)
 {
     fprintf(stdout, "SAX.internalSubset(%s,", name);
@@ -155,6 +168,27 @@
 }
 
 /**
+ * externalSubsetDebug:
+ * @ctxt:  An XML parser context
+ *
+ * Does this document has an external subset
+ */
+static void
+externalSubsetDebug(void *ctx UNUSED, const xmlChar *name,
+	       const xmlChar *ExternalID, const xmlChar *SystemID)
+{
+    fprintf(stdout, "SAX.externalSubset(%s,", name);
+    if (ExternalID == NULL)
+	fprintf(stdout, " ,");
+    else
+	fprintf(stdout, " %s,", ExternalID);
+    if (SystemID == NULL)
+	fprintf(stdout, " )\n");
+    else
+	fprintf(stdout, " %s)\n", SystemID);
+}
+
+/**
  * resolveEntityDebug:
  * @ctxt:  An XML parser context
  * @publicId: The public ID of the entity
@@ -168,8 +202,8 @@
  *
  * Returns the xmlParserInputPtr if inlined or NULL for DOM behaviour.
  */
-xmlParserInputPtr
-resolveEntityDebug(void *ctx, const xmlChar *publicId, const xmlChar *systemId)
+static xmlParserInputPtr
+resolveEntityDebug(void *ctx UNUSED, const xmlChar *publicId, const xmlChar *systemId)
 {
     /* xmlParserCtxtPtr ctxt = (xmlParserCtxtPtr) ctx; */
 
@@ -200,8 +234,8 @@
  *
  * Returns the xmlParserInputPtr if inlined or NULL for DOM behaviour.
  */
-xmlEntityPtr
-getEntityDebug(void *ctx, const xmlChar *name)
+static xmlEntityPtr
+getEntityDebug(void *ctx UNUSED, const xmlChar *name)
 {
     fprintf(stdout, "SAX.getEntity(%s)\n", name);
     return(NULL);
@@ -216,8 +250,8 @@
  *
  * Returns the xmlParserInputPtr
  */
-xmlEntityPtr
-getParameterEntityDebug(void *ctx, const xmlChar *name)
+static xmlEntityPtr
+getParameterEntityDebug(void *ctx UNUSED, const xmlChar *name)
 {
     fprintf(stdout, "SAX.getParameterEntity(%s)\n", name);
     return(NULL);
@@ -235,8 +269,8 @@
  *
  * An entity definition has been parsed
  */
-void
-entityDeclDebug(void *ctx, const xmlChar *name, int type,
+static void
+entityDeclDebug(void *ctx UNUSED, const xmlChar *name, int type,
           const xmlChar *publicId, const xmlChar *systemId, xmlChar *content)
 {
     fprintf(stdout, "SAX.entityDecl(%s, %d, %s, %s, %s)\n",
@@ -251,10 +285,10 @@
  *
  * An attribute definition has been parsed
  */
-void
-attributeDeclDebug(void *ctx, const xmlChar *elem, const xmlChar *name,
+static void
+attributeDeclDebug(void *ctx UNUSED, const xmlChar *elem, const xmlChar *name,
               int type, int def, const xmlChar *defaultValue,
-	      xmlEnumerationPtr tree)
+	      xmlEnumerationPtr tree UNUSED)
 {
     if (defaultValue == NULL)
 	fprintf(stdout, "SAX.attributeDecl(%s, %s, %d, %d, NULL, ...)\n",
@@ -273,9 +307,9 @@
  *
  * An element definition has been parsed
  */
-void
-elementDeclDebug(void *ctx, const xmlChar *name, int type,
-	    xmlElementContentPtr content)
+static void
+elementDeclDebug(void *ctx UNUSED, const xmlChar *name, int type,
+	    xmlElementContentPtr content UNUSED)
 {
     fprintf(stdout, "SAX.elementDecl(%s, %d, ...)\n",
             name, type);
@@ -290,8 +324,8 @@
  *
  * What to do when a notation declaration has been parsed.
  */
-void
-notationDeclDebug(void *ctx, const xmlChar *name,
+static void
+notationDeclDebug(void *ctx UNUSED, const xmlChar *name,
 	     const xmlChar *publicId, const xmlChar *systemId)
 {
     fprintf(stdout, "SAX.notationDecl(%s, %s, %s)\n",
@@ -308,8 +342,8 @@
  *
  * What to do when an unparsed entity declaration is parsed
  */
-void
-unparsedEntityDeclDebug(void *ctx, const xmlChar *name,
+static void
+unparsedEntityDeclDebug(void *ctx UNUSED, const xmlChar *name,
 		   const xmlChar *publicId, const xmlChar *systemId,
 		   const xmlChar *notationName)
 {
@@ -326,8 +360,8 @@
  * Receive the document locator at startup, actually xmlDefaultSAXLocator
  * Everything is available on the context, so this is useless in our case.
  */
-void
-setDocumentLocatorDebug(void *ctx, xmlSAXLocatorPtr loc)
+static void
+setDocumentLocatorDebug(void *ctx UNUSED, xmlSAXLocatorPtr loc UNUSED)
 {
     fprintf(stdout, "SAX.setDocumentLocator()\n");
 }
@@ -338,8 +372,8 @@
  *
  * called when the document start being processed.
  */
-void
-startDocumentDebug(void *ctx)
+static void
+startDocumentDebug(void *ctx UNUSED)
 {
     fprintf(stdout, "SAX.startDocument()\n");
 }
@@ -350,8 +384,8 @@
  *
  * called when the document end has been detected.
  */
-void
-endDocumentDebug(void *ctx)
+static void
+endDocumentDebug(void *ctx UNUSED)
 {
     fprintf(stdout, "SAX.endDocument()\n");
 }
@@ -363,8 +397,8 @@
  *
  * called when an opening tag has been processed.
  */
-void
-startElementDebug(void *ctx, const xmlChar *name, const xmlChar **atts)
+static void
+startElementDebug(void *ctx UNUSED, const xmlChar *name, const xmlChar **atts)
 {
     int i;
 
@@ -386,8 +420,8 @@
  *
  * called when the end of an element has been detected.
  */
-void
-endElementDebug(void *ctx, const xmlChar *name)
+static void
+endElementDebug(void *ctx UNUSED, const xmlChar *name)
 {
     fprintf(stdout, "SAX.endElement(%s)\n", (char *) name);
 }
@@ -401,8 +435,8 @@
  * receiving some chars from the parser.
  * Question: how much at a time ???
  */
-void
-charactersDebug(void *ctx, const xmlChar *ch, int len)
+static void
+charactersDebug(void *ctx UNUSED, const xmlChar *ch, int len)
 {
     char output[40];
     int i;
@@ -421,8 +455,8 @@
  *
  * called when an entity reference is detected. 
  */
-void
-referenceDebug(void *ctx, const xmlChar *name)
+static void
+referenceDebug(void *ctx UNUSED, const xmlChar *name)
 {
     fprintf(stdout, "SAX.reference(%s)\n", name);
 }
@@ -437,8 +471,8 @@
  * receiving some ignorable whitespaces from the parser.
  * Question: how much at a time ???
  */
-void
-ignorableWhitespaceDebug(void *ctx, const xmlChar *ch, int len)
+static void
+ignorableWhitespaceDebug(void *ctx UNUSED, const xmlChar *ch, int len)
 {
     char output[40];
     int i;
@@ -458,8 +492,8 @@
  *
  * A processing instruction has been parsed.
  */
-void
-processingInstructionDebug(void *ctx, const xmlChar *target,
+static void
+processingInstructionDebug(void *ctx UNUSED, const xmlChar *target,
                       const xmlChar *data)
 {
     fprintf(stdout, "SAX.processingInstruction(%s, %s)\n",
@@ -474,8 +508,8 @@
  *
  * called when a pcdata block has been parsed
  */
-void
-cdataBlockDebug(void *ctx, const xmlChar *value, int len)
+static void
+cdataBlockDebug(void *ctx UNUSED, const xmlChar *value, int len)
 {
     fprintf(stdout, "SAX.pcdata(%.20s, %d)\n",
 	    (char *) value, len);
@@ -488,8 +522,8 @@
  *
  * A comment has been parsed.
  */
-void
-commentDebug(void *ctx, const xmlChar *value)
+static void
+commentDebug(void *ctx UNUSED, const xmlChar *value)
 {
     fprintf(stdout, "SAX.comment(%s)\n", value);
 }
@@ -503,8 +537,8 @@
  * Display and format a warning messages, gives file, line, position and
  * extra parameters.
  */
-void
-warningDebug(void *ctx, const char *msg, ...)
+static void
+warningDebug(void *ctx UNUSED, const char *msg, ...)
 {
     va_list args;
 
@@ -523,8 +557,8 @@
  * Display and format a error messages, gives file, line, position and
  * extra parameters.
  */
-void
-errorDebug(void *ctx, const char *msg, ...)
+static void
+errorDebug(void *ctx UNUSED, const char *msg, ...)
 {
     va_list args;
 
@@ -543,8 +577,8 @@
  * Display and format a fatalError messages, gives file, line, position and
  * extra parameters.
  */
-void
-fatalErrorDebug(void *ctx, const char *msg, ...)
+static void
+fatalErrorDebug(void *ctx UNUSED, const char *msg, ...)
 {
     va_list args;
 
@@ -580,7 +614,8 @@
     errorDebug,
     fatalErrorDebug,
     getParameterEntityDebug,
-    cdataBlockDebug
+    cdataBlockDebug,
+    externalSubsetDebug
 };
 
 xmlSAXHandlerPtr debugSAXHandler = &debugSAXHandlerStruct;
@@ -591,7 +626,8 @@
  *									*
  ************************************************************************/
 
-void parseAndPrintFile(char *filename) {
+static void
+parseAndPrintFile(char *filename) {
     int res;
 
     if (push) {
@@ -602,16 +638,16 @@
 	 */
 	f = fopen(filename, "r");
 	if (f != NULL) {
-	    int res;
+	    int ret;
 	    char chars[10];
 	    xmlParserCtxtPtr ctxt;
 
-	    res = fread(chars, 1, 4, f);
-	    if (res > 0) {
+	    ret = fread(chars, 1, 4, f);
+	    if (ret > 0) {
 		ctxt = xmlCreatePushParserCtxt(emptySAXHandler, NULL,
-			    chars, res, filename);
-		while ((res = fread(chars, 1, 3, f)) > 0) {
-		    xmlParseChunk(ctxt, chars, res, 0);
+			    chars, ret, filename);
+		while ((ret = fread(chars, 1, 3, f)) > 0) {
+		    xmlParseChunk(ctxt, chars, ret, 0);
 		}
 		xmlParseChunk(ctxt, chars, 0, 1);
 		xmlFreeParserCtxt(ctxt);
@@ -626,22 +662,22 @@
 	 */
 	f = fopen(filename, "r");
 	if (f != NULL) {
-	    int res;
+	    int ret;
 	    char chars[10];
 	    xmlParserCtxtPtr ctxt;
 
-	    res = fread(chars, 1, 4, f);
-	    if (res > 0) {
+	    ret = fread(chars, 1, 4, f);
+	    if (ret > 0) {
 		ctxt = xmlCreatePushParserCtxt(debugSAXHandler, NULL,
-			    chars, res, filename);
-		while ((res = fread(chars, 1, 3, f)) > 0) {
-		    xmlParseChunk(ctxt, chars, res, 0);
+			    chars, ret, filename);
+		while ((ret = fread(chars, 1, 3, f)) > 0) {
+		    xmlParseChunk(ctxt, chars, ret, 0);
 		}
-		res = xmlParseChunk(ctxt, chars, 0, 1);
+		ret = xmlParseChunk(ctxt, chars, 0, 1);
 		xmlFreeParserCtxt(ctxt);
-		if (res != 0) {
+		if (ret != 0) {
 		    fprintf(stdout,
-		            "xmlSAXUserParseFile returned error %d\n", res);
+		            "xmlSAXUserParseFile returned error %d\n", ret);
 		}
 	    }
 	    fclose(f);