diff -r 565cec5b9cc2 Config.mk
--- a/Config.mk	Tue Aug  2 23:13:50 2005
+++ b/Config.mk	Tue Aug  2 18:33:54 2005
@@ -7,7 +7,7 @@
 
 # Tools to run on system hosting the build
 HOSTCC     = gcc
-HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer 
+HOSTCFLAGS = -Wall -Werror -Wstrict-prototypes -O2 -fomit-frame-pointer 
 
 AS         = $(CROSS_COMPILE)as
 LD         = $(CROSS_COMPILE)ld
diff -r 565cec5b9cc2 xen/tools/Makefile
--- a/xen/tools/Makefile	Tue Aug  2 23:13:50 2005
+++ b/xen/tools/Makefile	Tue Aug  2 18:33:54 2005
@@ -10,4 +10,4 @@
 	rm -f *.o symbols
 
 symbols: symbols.c
-	$(HOSTCC) -o $@ $<
+	$(HOSTCC) $(HOSTCFLAGS) -o $@ $<
diff -r 565cec5b9cc2 xen/tools/symbols.c
--- a/xen/tools/symbols.c	Tue Aug  2 23:13:50 2005
+++ b/xen/tools/symbols.c	Tue Aug  2 18:33:54 2005
@@ -152,8 +152,8 @@
 	/* include the type field in the symbol name, so that it gets
 	 * compressed together */
 	s->len = strlen(str) + 1;
-	s->sym = (char *) malloc(s->len + 1);
-	strcpy(s->sym + 1, str);
+	s->sym = (unsigned char *) malloc(s->len + 1);
+	strcpy((char *)(s->sym + 1), str);
 	s->sym[0] = s->type;
 
 	return 0;
@@ -197,16 +197,18 @@
 		 * move then they may get dropped in pass 2, which breaks the
 		 * symbols rules.
 		 */
-		if (s->addr == _etext && strcmp(s->sym + offset, "_etext"))
+		if (s->addr == _etext &&
+		    strcmp((char *)(s->sym + offset), "_etext"))
 			return 0;
 	}
 
 	/* Exclude symbols which vary between passes. */
-	if (strstr(s->sym + offset, "_compiled."))
+	if (strstr((char *)(s->sym + offset), "_compiled."))
 		return 0;
 
 	for (i = 0; special_symbols[i]; i++)
-		if( strcmp(s->sym + offset, special_symbols[i]) == 0 )
+		if( strcmp((char *)(s->sym + offset),
+		           special_symbols[i]) == 0 )
 			return 0;
 
 	return 1;