--- /opt/local/share/macports/Tcl/port1.0/portconfigure.tcl.orig	2007-12-03 17:21:09.000000000 +0800
+++ /opt/local/share/macports/Tcl/port1.0/portconfigure.tcl	2007-12-03 18:07:44.000000000 +0800
@@ -63,9 +63,9 @@
 # Universal options & default values.
 options configure.universal_args		configure.universal_cflags configure.universal_cppflags configure.universal_cxxflags configure.universal_ldflags configure.universal_env
 default configure.universal_args		--disable-dependency-tracking
-default configure.universal_cflags		{"-isysroot /Developer/SDKs/MacOSX10.4u.sdk -arch i386 -arch ppc"}
+default configure.universal_cflags		{"-isysroot /Developer/SDKs/MacOSX10.4u.sdk -arch i386 -arch ppc -mmacosx-version-min=10.4"}
 default configure.universal_cppflags	{}
-default configure.universal_cxxflags	{"-isysroot /Developer/SDKs/MacOSX10.4u.sdk -arch i386 -arch ppc"}
+default configure.universal_cxxflags	{"-isysroot /Developer/SDKs/MacOSX10.4u.sdk -arch i386 -arch ppc -mmacosx-version-min=10.4"}
 default configure.universal_ldflags		{"-arch i386 -arch ppc"}
 
 # Select a distinct compiler (C, C preprocessor, C++)