diff -urN PDL-2.4.2.orig/perldl.conf PDL-2.4.2/perldl.conf
--- PDL-2.4.2.orig/perldl.conf	2004-12-27 12:29:38.000000000 -0500
+++ PDL-2.4.2/perldl.conf	2005-05-28 02:39:06.000000000 -0400
@@ -83,7 +83,7 @@
 # There are problems with the build on OS-X, so we turn it off by default
 # for such systems
 #
-	WITH_3D => $^O eq "darwin" ? 0 : undef,
+	WITH_3D => 0,
 #
 #  For Mesa 3.2
 #
@@ -101,9 +101,9 @@
 #	OPENGL_DEFINE => '',
 #
 # Let perl try to figure it out
-	OPENGL_LIBS => undef,
- 	OPENGL_INC => undef,
-	OPENGL_DEFINE => undef,
+	OPENGL_LIBS => 0,
+ 	OPENGL_INC => 0,
+	OPENGL_DEFINE => 0,
 # Whether or not to build the Karma interface module
 
         WITH_KARMA => undef,    # Leave it up to PDL to decide