diff --git a/Lib/distutils/sysconfig.py b/Lib/distutils/sysconfig.py
index 72aa511..2a18d2b 100644
--- a/Lib/distutils/sysconfig.py
+++ b/Lib/distutils/sysconfig.py
@@ -366,8 +366,8 @@
     # MACOSX_DEPLOYMENT_TARGET: configure bases some choices on it so
     # it needs to be compatible.
     # If it isn't set we set it to the configure-time value
-    if sys.platform == 'darwin' and g.has_key('CONFIGURE_MACOSX_DEPLOYMENT_TARGET'):
-        cfg_target = g['CONFIGURE_MACOSX_DEPLOYMENT_TARGET']
+    if sys.platform == 'darwin' and g.has_key('MACOSX_DEPLOYMENT_TARGET'):
+        cfg_target = g['MACOSX_DEPLOYMENT_TARGET']
         cur_target = os.getenv('MACOSX_DEPLOYMENT_TARGET', '')
         if cur_target == '':
             cur_target = cfg_target
diff --git a/Makefile.pre.in b/Makefile.pre.in
index f8a7481..e088c9c 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -108,13 +108,17 @@
 BUILDEXE=	@BUILDEXEEXT@
 
 # Short name and location for Mac OS X Python framework
+UNIVERSALSDK=@UNIVERSALSDK@
 PYTHONFRAMEWORK=	@PYTHONFRAMEWORK@
 PYTHONFRAMEWORKDIR=	@PYTHONFRAMEWORKDIR@
 PYTHONFRAMEWORKPREFIX=	@PYTHONFRAMEWORKPREFIX@
 PYTHONFRAMEWORKINSTALLDIR= @PYTHONFRAMEWORKINSTALLDIR@
 # Deployment target selected during configure, to be checked
-# by distutils
-CONFIGURE_MACOSX_DEPLOYMENT_TARGET=@CONFIGURE_MACOSX_DEPLOYMENT_TARGET@
+# by distutils. The export statement is needed to ensure that the
+# deployment target is active during build.
+MACOSX_DEPLOYMENT_TARGET=@CONFIGURE_MACOSX_DEPLOYMENT_TARGET@
+@EXPORT_MACOSX_DEPLOYMENT_TARGET@export MACOSX_DEPLOYMENT_TARGET
+
 # Options to enable prebinding (for fast startup prior to Mac OS X 10.3)
 OTHER_LIBTOOL_OPT=@OTHER_LIBTOOL_OPT@
 
@@ -377,8 +381,17 @@
                 $(RESSRCDIR)/version.plist \
                 $(RESSRCDIR)/English.lproj/InfoPlist.strings
 	$(INSTALL) -d -m $(DIRMODE) $(PYTHONFRAMEWORKDIR)/Versions/$(VERSION)
-	libtool -o $(LDLIBRARY) -dynamic $(OTHER_LIBTOOL_OPT) $(LIBRARY) \
-		@LIBTOOL_CRUFT@
+	if test "${UNIVERSALSDK}"; then \
+		$(CC) -o $(LDLIBRARY) -arch i386 -arch ppc -dynamiclib \
+			-isysroot "${UNIVERSALSDK}" \
+			-all_load $(LIBRARY) -Wl,-single_module \
+			-install_name $(DESTDIR)$(PYTHONFRAMEWORKINSTALLDIR)/Versions/$(VERSION)/Python \
+			-compatibility_version $(VERSION) \
+			-current_version $(VERSION); \
+        else \
+		libtool -o $(LDLIBRARY) -dynamic $(OTHER_LIBTOOL_OPT) $(LIBRARY) \
+			@LIBTOOL_CRUFT@ ;\
+	fi
 	$(INSTALL) -d -m $(DIRMODE)  \
 		$(PYTHONFRAMEWORKDIR)/Versions/$(VERSION)/Resources/English.lproj
 	$(INSTALL_DATA) $(RESSRCDIR)/Info.plist \
@@ -568,6 +581,19 @@
 		-$(TESTPYTHON) $(TESTPROG) $(TESTOPTS) -uall
 		$(TESTPYTHON) $(TESTPROG) $(TESTOPTS) -uall
 
+#  Run the unitests for both architectures in a Universal build on OSX
+#  Must be run on an Intel box.
+testuniversal:	all platform
+		if [ `arch` != 'i386' ];then \
+			echo "This can only be used on OSX/i386" ;\
+			exit 1 ;\
+		fi
+		-find $(srcdir)/Lib -name '*.py[co]' -print | xargs rm -f
+		-$(TESTPYTHON) $(TESTPROG) $(TESTOPTS) -uall
+		$(TESTPYTHON) $(TESTPROG) $(TESTOPTS) -uall
+		$(RUNSHARED) /usr/libexec/oah/translate ./$(BUILDPYTHON) -E -tt $(TESTPROG) $(TESTOPTS) -uall
+
+
 # Like testall, but with a single pass only
 buildbottest:	all platform
 		$(TESTPYTHON) $(TESTPROG) $(TESTOPTS) -uall -rw
diff --git a/README b/README
index 9a01fe4..ac7ad57 100644
--- a/README
+++ b/README
@@ -579,7 +579,12 @@
         want to use any Aqua-based GUI toolkit (whether Tkinter, wxPython,
         Carbon, Cocoa or anything else).
 
-        See Mac/OSX/README for more information on framework builds.
+	You may also want to try the configure option "--enable-universalsdk"
+	which builds Python as a universal binary with support for the 
+	i386 and PPC architetures. This requires Xcode 2.1 or later to build.
+
+        See Mac/OSX/README for more information on framework and 
+	universal builds.
 
 Cygwin: With recent (relative to the time of writing, 2001-12-19)
         Cygwin installations, there are problems with the interaction
diff --git a/configure b/configure
index ab5f4182..e05fad6 100755
--- a/configure
+++ b/configure
@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.in Revision: 45387 .
+# From configure.in Revision: 45392 .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.59 for python 2.5.
 #
@@ -312,7 +312,7 @@
 # include <unistd.h>
 #endif"
 
-ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS VERSION SOVERSION CONFIG_ARGS PYTHONFRAMEWORK PYTHONFRAMEWORKDIR PYTHONFRAMEWORKPREFIX PYTHONFRAMEWORKINSTALLDIR MACHDEP SGI_ABI EXTRAPLATDIR EXTRAMACHDEPPATH CONFIGURE_MACOSX_DEPLOYMENT_TARGET CC CFLAGS LDFLAGS CPPFLAGS ac_ct_CC EXEEXT OBJEXT CXX MAINCC CPP EGREP BUILDEXEEXT LIBRARY LDLIBRARY DLLLIBRARY BLDLIBRARY LDLIBRARYDIR INSTSONAME RUNSHARED LINKCC RANLIB ac_ct_RANLIB AR SVNVERSION INSTALL_PROGRAM INSTALL_SCRIPT INSTALL_DATA LN OPT BASECFLAGS OTHER_LIBTOOL_OPT LIBTOOL_CRUFT SO LDSHARED BLDSHARED CCSHARED LINKFORSHARED CFLAGSFORSHARED SHLIBS USE_SIGNAL_MODULE SIGNAL_OBJS USE_THREAD_MODULE LDLAST THREADOBJ DLINCLDIR DYNLOADFILE MACHDEP_OBJS TRUE LIBOBJS HAVE_GETHOSTBYNAME_R_6_ARG HAVE_GETHOSTBYNAME_R_5_ARG HAVE_GETHOSTBYNAME_R_3_ARG HAVE_GETHOSTBYNAME_R HAVE_GETHOSTBYNAME LIBM LIBC UNICODE_OBJS THREADHEADERS SRCDIRS LTLIBOBJS'
+ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS VERSION SOVERSION CONFIG_ARGS UNIVERSALSDK PYTHONFRAMEWORK PYTHONFRAMEWORKDIR PYTHONFRAMEWORKPREFIX PYTHONFRAMEWORKINSTALLDIR MACHDEP SGI_ABI EXTRAPLATDIR EXTRAMACHDEPPATH CONFIGURE_MACOSX_DEPLOYMENT_TARGET EXPORT_MACOSX_DEPLOYMENT_TARGET CC CFLAGS LDFLAGS CPPFLAGS ac_ct_CC EXEEXT OBJEXT CXX MAINCC CPP EGREP BUILDEXEEXT LIBRARY LDLIBRARY DLLLIBRARY BLDLIBRARY LDLIBRARYDIR INSTSONAME RUNSHARED LINKCC RANLIB ac_ct_RANLIB AR SVNVERSION INSTALL_PROGRAM INSTALL_SCRIPT INSTALL_DATA LN OPT BASECFLAGS OTHER_LIBTOOL_OPT LIBTOOL_CRUFT SO LDSHARED BLDSHARED CCSHARED LINKFORSHARED CFLAGSFORSHARED SHLIBS USE_SIGNAL_MODULE SIGNAL_OBJS USE_THREAD_MODULE LDLAST THREADOBJ DLINCLDIR DYNLOADFILE MACHDEP_OBJS TRUE LIBOBJS HAVE_GETHOSTBYNAME_R_6_ARG HAVE_GETHOSTBYNAME_R_5_ARG HAVE_GETHOSTBYNAME_R_3_ARG HAVE_GETHOSTBYNAME_R HAVE_GETHOSTBYNAME LIBM LIBC UNICODE_OBJS THREADHEADERS SRCDIRS LTLIBOBJS'
 ac_subst_files=''
 
 # Initialize some variables set by options.
@@ -845,6 +845,8 @@
 Optional Features:
   --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
   --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
+  --enable-universalsdk[SDKDIR]
+                          Build agains Mac OS X 10.4u SDK (ppc/i386)
   --enable-framework[=INSTALLDIR]
                           Build (MacOSX|Darwin) framework
   --enable-shared         disable/enable building shared python library
@@ -1400,6 +1402,33 @@
 
 CONFIG_ARGS="$ac_configure_args"
 
+# Check whether --enable-universalsdk or --disable-universalsdk was given.
+if test "${enable_universalsdk+set}" = set; then
+  enableval="$enable_universalsdk"
+
+	case $enableval in
+	yes)
+		enableval=/Developer/SDKs/MacOSX10.4u.sdk
+		;;
+	esac
+	case $enableval in
+	no)
+		UNIVERSALSDK=
+		enable_universalsdk=
+		;;
+	*)
+		UNIVERSALSDK=$enableval
+		;;
+	esac
+
+else
+
+   	UNIVERSALSDK=
+	enable_universalsdk=
+
+fi;
+
+
 # Check whether --enable-framework or --disable-framework was given.
 if test "${enable_framework+set}" = set; then
   enableval="$enable_framework"
@@ -1617,7 +1646,9 @@
 # it may influence the way we can build extensions, so distutils
 # needs to check it
 
+
 CONFIGURE_MACOSX_DEPLOYMENT_TARGET=
+EXPORT_MACOSX_DEPLOYMENT_TARGET='#'
 
 # checks for alternative programs
 
@@ -3807,6 +3838,10 @@
 	# is there any other compiler on Darwin besides gcc?
 	Darwin*)
 	    BASECFLAGS="$BASECFLAGS -Wno-long-double -no-cpp-precomp -mno-fused-madd"
+	    if test "${enable_universalsdk}"; then
+		BASECFLAGS="-arch ppc -arch i386 -isysroot ${UNIVERSALSDK} ${BASECFLAGS}"
+	    fi
+
 	    ;;
 	OSF*)
 	    BASECFLAGS="$BASECFLAGS -mieee"
@@ -10753,7 +10788,12 @@
 
 case $ac_sys_system/$ac_sys_release in
   Darwin/[01567]\..*)
-    LIBTOOL_CRUFT="-framework System -lcc_dynamic -arch_only `arch`"
+    LIBTOOL_CRUFT="-framework System -lcc_dynamic"
+    if test "${enable_universalsdk}"; then
+	    :
+    else
+	LIBTOOL_CRUFT="${LIBTOOL_CRUFT} -arch_only `arch`"
+    fi
     LIBTOOL_CRUFT=$LIBTOOL_CRUFT' -install_name $(PYTHONFRAMEWORKINSTALLDIR)/Versions/$(VERSION)/$(PYTHONFRAMEWORK)'
     LIBTOOL_CRUFT=$LIBTOOL_CRUFT' -compatibility_version $(VERSION) -current_version $(VERSION)';;
   Darwin/*)
@@ -10888,9 +10928,16 @@
 		# Use -undefined dynamic_lookup whenever possible (10.3 and later).
 		# This allows an extension to be used in any Python
 		cur_target=`sw_vers -productVersion | sed 's/\(10\.[0-9]*\).*/\1/'`
+		if test ${cur_target} '>' 10.2; then
+			cur_target=10.3
+		fi
 		CONFIGURE_MACOSX_DEPLOYMENT_TARGET=${MACOSX_DEPLOYMENT_TARGET-${cur_target}}
+		EXPORT_MACOSX_DEPLOYMENT_TARGET=''
 		if test ${MACOSX_DEPLOYMENT_TARGET-${cur_target}} '>' 10.2
 		then
+			if test "${enable_universalsdk}"; then
+				LDFLAGS="-arch i386 -arch ppc -isysroot ${UNIVERSALSDK} ${LDFLAGS}"
+			fi
 			LDSHARED='$(CC) $(LDFLAGS) -bundle -undefined dynamic_lookup'
 			BLDSHARED="$LDSHARED"
 		else
@@ -20313,6 +20360,8 @@
 esac
 
 
+
+
 # Check whether right shifting a negative integer extends the sign bit
 # or fills with zeros (like the Cray J90, according to Tim Peters).
 echo "$as_me:$LINENO: checking whether right shift extends the sign bit" >&5
@@ -22395,6 +22444,7 @@
 s,@VERSION@,$VERSION,;t t
 s,@SOVERSION@,$SOVERSION,;t t
 s,@CONFIG_ARGS@,$CONFIG_ARGS,;t t
+s,@UNIVERSALSDK@,$UNIVERSALSDK,;t t
 s,@PYTHONFRAMEWORK@,$PYTHONFRAMEWORK,;t t
 s,@PYTHONFRAMEWORKDIR@,$PYTHONFRAMEWORKDIR,;t t
 s,@PYTHONFRAMEWORKPREFIX@,$PYTHONFRAMEWORKPREFIX,;t t
@@ -22404,6 +22454,7 @@
 s,@EXTRAPLATDIR@,$EXTRAPLATDIR,;t t
 s,@EXTRAMACHDEPPATH@,$EXTRAMACHDEPPATH,;t t
 s,@CONFIGURE_MACOSX_DEPLOYMENT_TARGET@,$CONFIGURE_MACOSX_DEPLOYMENT_TARGET,;t t
+s,@EXPORT_MACOSX_DEPLOYMENT_TARGET@,$EXPORT_MACOSX_DEPLOYMENT_TARGET,;t t
 s,@CC@,$CC,;t t
 s,@CFLAGS@,$CFLAGS,;t t
 s,@LDFLAGS@,$LDFLAGS,;t t
diff --git a/configure.in b/configure.in
index c303445..e2dae9d 100644
--- a/configure.in
+++ b/configure.in
@@ -60,6 +60,29 @@
 AC_SUBST(CONFIG_ARGS)
 CONFIG_ARGS="$ac_configure_args"
 
+AC_ARG_ENABLE(universalsdk,
+	AC_HELP_STRING(--enable-universalsdk@<:@SDKDIR@:>@, Build agains Mac OS X 10.4u SDK (ppc/i386)),
+[
+	case $enableval in
+	yes)
+		enableval=/Developer/SDKs/MacOSX10.4u.sdk
+		;;
+	esac
+	case $enableval in
+	no)
+		UNIVERSALSDK=
+		enable_universalsdk=
+		;;
+	*)
+		UNIVERSALSDK=$enableval
+		;;
+	esac
+],[
+   	UNIVERSALSDK=
+	enable_universalsdk=
+])
+AC_SUBST(UNIVERSALSDK)
+
 dnl quadrigraphs "@<:@" and "@:>@" produce "[" and "]" in the output
 AC_ARG_ENABLE(framework,
               AC_HELP_STRING(--enable-framework@<:@=INSTALLDIR@:>@, Build (MacOSX|Darwin) framework),
@@ -258,7 +281,9 @@
 # it may influence the way we can build extensions, so distutils
 # needs to check it
 AC_SUBST(CONFIGURE_MACOSX_DEPLOYMENT_TARGET)
+AC_SUBST(EXPORT_MACOSX_DEPLOYMENT_TARGET)
 CONFIGURE_MACOSX_DEPLOYMENT_TARGET=
+EXPORT_MACOSX_DEPLOYMENT_TARGET='#'
 
 # checks for alternative programs
 
@@ -740,6 +765,10 @@
 	# is there any other compiler on Darwin besides gcc?
 	Darwin*)
 	    BASECFLAGS="$BASECFLAGS -Wno-long-double -no-cpp-precomp -mno-fused-madd"
+	    if test "${enable_universalsdk}"; then
+		BASECFLAGS="-arch ppc -arch i386 -isysroot ${UNIVERSALSDK} ${BASECFLAGS}"
+	    fi
+
 	    ;;
 	OSF*)
 	    BASECFLAGS="$BASECFLAGS -mieee"
@@ -1263,7 +1292,12 @@
 AC_SUBST(LIBTOOL_CRUFT)
 case $ac_sys_system/$ac_sys_release in
   Darwin/@<:@01567@:>@\..*) 
-    LIBTOOL_CRUFT="-framework System -lcc_dynamic -arch_only `arch`"
+    LIBTOOL_CRUFT="-framework System -lcc_dynamic"
+    if test "${enable_universalsdk}"; then
+	    :
+    else
+	LIBTOOL_CRUFT="${LIBTOOL_CRUFT} -arch_only `arch`"
+    fi
     LIBTOOL_CRUFT=$LIBTOOL_CRUFT' -install_name $(PYTHONFRAMEWORKINSTALLDIR)/Versions/$(VERSION)/$(PYTHONFRAMEWORK)'
     LIBTOOL_CRUFT=$LIBTOOL_CRUFT' -compatibility_version $(VERSION) -current_version $(VERSION)';;
   Darwin/*)
@@ -1386,9 +1420,16 @@
 		# Use -undefined dynamic_lookup whenever possible (10.3 and later).
 		# This allows an extension to be used in any Python
 		cur_target=`sw_vers -productVersion | sed 's/\(10\.[[0-9]]*\).*/\1/'`
+		if test ${cur_target} '>' 10.2; then
+			cur_target=10.3
+		fi
 		CONFIGURE_MACOSX_DEPLOYMENT_TARGET=${MACOSX_DEPLOYMENT_TARGET-${cur_target}}
+		EXPORT_MACOSX_DEPLOYMENT_TARGET=''
 		if test ${MACOSX_DEPLOYMENT_TARGET-${cur_target}} '>' 10.2
 		then
+			if test "${enable_universalsdk}"; then
+				LDFLAGS="-arch i386 -arch ppc -isysroot ${UNIVERSALSDK} ${LDFLAGS}"
+			fi
 			LDSHARED='$(CC) $(LDFLAGS) -bundle -undefined dynamic_lookup'
 			BLDSHARED="$LDSHARED"
 		else
@@ -2873,6 +2914,23 @@
 
 # check for endianness
 AC_C_BIGENDIAN
+AH_VERBATIM([WORDS_BIGENDIAN],
+[
+ /* Define to 1 if your processor stores words with the most significant byte
+    first (like Motorola and SPARC, unlike Intel and VAX). 
+
+    The block below does compile-time checking for endianness on platforms
+    that use GCC and therefore allows compiling fat binaries on OSX by using 
+    '-arch ppc -arch i386' as the compile flags. The phrasing was choosen
+    such that the configure-result is used on systems that don't use GCC.
+  */
+#ifdef __BIG_ENDIAN__
+#define WORDS_BIGENDIAN 1
+#else
+#ifndef __LITTLE_ENDIAN__
+#undef WORDS_BIGENDIAN
+#endif
+#endif])
 
 # Check whether right shifting a negative integer extends the sign bit
 # or fills with zeros (like the Cray J90, according to Tim Peters).
diff --git a/pyconfig.h.in b/pyconfig.h.in
index 8df7f9b..886b336 100644
--- a/pyconfig.h.in
+++ b/pyconfig.h.in
@@ -846,9 +846,22 @@
 /* Define to profile with the Pentium timestamp counter */
 #undef WITH_TSC
 
-/* Define to 1 if your processor stores words with the most significant byte
-   first (like Motorola and SPARC, unlike Intel and VAX). */
+
+ /* Define to 1 if your processor stores words with the most significant byte
+    first (like Motorola and SPARC, unlike Intel and VAX). 
+
+    The block below does compile-time checking for endianness on platforms
+    that use GCC and therefore allows compiling fat binaries on OSX by using 
+    '-arch ppc -arch i386' as the compile flags. The phrasing was choosen
+    such that the configure-result is used on systems that don't use GCC.
+  */
+#ifdef __BIG_ENDIAN__
+#define WORDS_BIGENDIAN 1
+#else
+#ifndef __LITTLE_ENDIAN__
 #undef WORDS_BIGENDIAN
+#endif
+#endif
 
 /* Define to 1 if on AIX 3.
    System headers sometimes define this.
diff --git a/setup.py b/setup.py
index e652969..a0996dc 100644
--- a/setup.py
+++ b/setup.py
@@ -913,20 +913,11 @@
         #
         # More information on Expat can be found at www.libexpat.org.
         #
-        if sys.byteorder == "little":
-            xmlbo = "1234"
-        else:
-            xmlbo = "4321"
         expatinc = os.path.join(os.getcwd(), srcdir, 'Modules', 'expat')
         define_macros = [
-            ('XML_NS', '1'),
-            ('XML_DTD', '1'),
-            ('BYTEORDER', xmlbo),
-            ('XML_CONTEXT_BYTES','1024'),
-            ]
-        for feature_macro in ['HAVE_MEMMOVE', 'HAVE_BCOPY']:
-            if config_h_vars.has_key(feature_macro):
-                define_macros.append((feature_macro, '1'))
+            ('HAVE_EXPAT_CONFIG_H', '1'),
+        ]
+
         exts.append(Extension('pyexpat',
                               define_macros = define_macros,
                               include_dirs = [expatinc],