I think once is enough.

p4raw-id: //depot/perl@21033

diff --git a/configure.gnu b/configure.gnu
index efffde5..46cc494 100755 (executable)
--- a/configure.gnu
+++ b/configure.gnu
@@ -71,12 +71,6 @@ EOM
                opts="$opts $arg"
                shift
                ;;
-       --prefix)
-               shift
-               arg="-Dprefix=$1"
-               opts="$opts $arg"
-               shift
-               ;;
        --cache-file=*)
                shift           # Just ignore it.
                ;;