Include the following patch (files/patch-src::xercesc::config.sub)

--- src/xercesc/config.sub.orig	Wed Feb  2 18:29:07 2005
+++ src/xercesc/config.sub	Wed Feb  2 18:29:02 2005
@@ -218,7 +218,7 @@
 		| mips64vr4300 | mips64vr4300el | mips64vr4100 | mips64vr4100el \
 		| mips64vr5000 | miprs64vr5000el | mcore \
 		| sparc | sparclet | sparclite | sparc64 | sparcv9 | v850 | c4x \
-		| thumb | d10v | d30v | fr30 | avr)
+		| thumb | d10v | d30v | fr30 | avr | amd64)
 		basic_machine=$basic_machine-unknown
 		;;
 	m6811 | m68hc11 | m6812 | m68hc12)
@@ -262,7 +262,7 @@
 	      | f301-* | armv*-* | s390-* | sv1-* | t3e-* \
 	      | m88110-* | m680[01234]0-* | m683?2-* | m68360-* | z8k-* | d10v-* \
 	      | thumb-* | v850-* | d30v-* | tic30-* | c30-* | fr30-* \
-	      | bs2000-* | tic54x-* | c54x-* | x86_64-*)
+	      | bs2000-* | tic54x-* | c54x-* | x86_64-* | amd64-*)
 		;;
 	# Recognize the various machine names and aliases which stand
 	# for a CPU type and a company and sometimes even an OS.