--- graphviz-2.20.3/configure.bad	2010-01-27 17:23:40.000000000 +0000
+++ graphviz-2.20.3/configure	2010-01-27 17:24:43.000000000 +0000
@@ -2595,7 +2595,7 @@
 case "${host_os}" in
   *linux* )
     case "${host_cpu}" in
-      powerpc64 | s390x | x86_64 )
+      powerpc64 | s390x | x86_64 | sparc64 )
         LIBPOSTFIX="64"
         ;;
     esac