diff -Naur a/configure b/configure
--- a/configure	2012-09-28 16:41:27.000000000 +0000
+++ b/configure	2013-05-17 22:25:24.500017206 +0000
@@ -21744,11 +21744,12 @@
 if ${ac_cv_path_ED+:} false; then :
   $as_echo_n "(cached) " >&6
 else
-  case $ED in
-  [\\/]* | ?:[\\/]*)
-  ac_cv_path_ED="$ED" # Let the user override the test with a path.
-  ;;
-  *)
+# Portage has its own use for $ED (bug #470210)
+#  case $ED in
+#  [\\/]* | ?:[\\/]*)
+#  ac_cv_path_ED="$ED" # Let the user override the test with a path.
+#  ;;
+#  *)
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
@@ -21765,8 +21766,9 @@
 IFS=$as_save_IFS
 
   test -z "$ac_cv_path_ED" && ac_cv_path_ED="ed"
-  ;;
-esac
+# (cont.) Portage has its own use for $ED (bug #470210)
+#  ;;
+#esac
 fi
 ED=$ac_cv_path_ED
 if test -n "$ED"; then