Adapted for the move of Mac/Lib to Lib/plat-mac. Makefile.pre.in now
knows about plat-mac subdirectories, and configure adds a variable
EXTRAPLATDIR. These together take care of copying Lib/plat-mac to
the destination on darwin.

Adding plat-mac is still done with a .pth file which is only created when
you do a framework build. I'm not 100% happy with this, but fixing it
really needs a functional pythonw in non-framework builds, and I don't
think I can do that before 2.3a1 (but I'll try:-).
diff --git a/configure.in b/configure.in
index 4869dd1..e461658 100644
--- a/configure.in
+++ b/configure.in
@@ -104,7 +104,7 @@
 	'')	MACHDEP="unknown";;
 	esac
 fi
-
+	
 # Some systems cannot stand _XOPEN_SOURCE being defined at all; they
 # disable features if it is defined, without any means to access these
 # features as extensions. For these systems, we skip the definition of
@@ -155,6 +155,18 @@
 fi
 AC_MSG_RESULT($MACHDEP)
 
+# And add extra plat-mac for darwin
+AC_SUBST(EXTRAPLATDIR)
+AC_MSG_CHECKING(EXTRAPLATDIR)
+if test -z "$EXTRAPLATDIR"
+then
+	case $MACHDEP in
+	darwin)	EXTRAPLATDIR="\$(PLATMACDIRS)";;
+	*) EXTRAPLATDIR="";;
+	esac
+fi
+AC_MSG_RESULT($EXTRAPLATDIR)
+
 # checks for alternative programs
 AC_MSG_CHECKING(for --without-gcc)
 AC_ARG_WITH(gcc,