diff -up gpac/configure~ gpac/configure
--- gpac/configure~	2008-12-17 14:58:05.000000000 +0100
+++ gpac/configure	2008-12-18 23:10:50.000000000 +0100
@@ -236,6 +236,10 @@ case "$cpu" in
   alpha)
     cpu="alpha"
   ;;
+  ppc64)
+    cpu="powerpc"
+    libdir="lib64"
+  ;;
   "Power Macintosh"|ppc)
     cpu="powerpc"
   ;;