diff --git a/configure b/configure
index 2ab95884770..0e028ff2329 100755
--- a/configure
+++ b/configure
@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.in Revision: 64567 .
+# From configure.in Revision: 65033 .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.61 for python 2.6.
 #
@@ -4643,6 +4643,8 @@ echo "${ECHO_T}$ac_cv_no_strict_aliasing_ok" >&6; }
 	Darwin*)
 	    # -Wno-long-double, -no-cpp-precomp, and -mno-fused-madd
 	    # used to be here, but non-Apple gcc doesn't accept them.
+
+
 	    if test "${enable_universalsdk}"; then
 		UNIVERSAL_ARCH_FLAGS=""
 	        if test "$UNIVERSAL_ARCHS" = "32-bit" ; then
@@ -4665,9 +4667,34 @@ echo "$as_me: error: proper usage is --with-universalarch=32-bit|64-bit|all" >&2
 
 
 		BASECFLAGS="${UNIVERSAL_ARCH_FLAGS} -isysroot ${UNIVERSALSDK} ${BASECFLAGS}"
-		CFLAGS="${UNIVERSAL_ARCH_FLAGS} -isysroot ${UNIVERSALSDK} ${CFLAGS}"
+		tgt=`sw_vers -productVersion | sed 's/\(10\.0-9*\).*/\1/'`
+		if test "${UNIVERSALSDK}" != "/" -a "${tgt}" '>' '10.4' ; then
+			CFLAGS="${UNIVERSAL_ARCH_FLAGS} -isysroot ${UNIVERSALSDK} ${CFLAGS}"
+		fi
 	    fi
 
+	    # Calculate the right deployment target for this build.
+	    #
+	    cur_target=`sw_vers -productVersion | sed 's/\(10\.[0-9]*\).*/\1/'`
+	    if test ${cur_target} '>' 10.2; then
+		    cur_target=10.3
+	    fi
+	    if test "${UNIVERSAL_ARCHS}" = "all"; then
+		    # Ensure that the default platform for a 4-way
+		    # universal build is OSX 10.5, that's the first
+		    # OS release where 4-way builds make sense.
+		    cur_target='10.5'
+	    fi
+	    CONFIGURE_MACOSX_DEPLOYMENT_TARGET=${MACOSX_DEPLOYMENT_TARGET-${cur_target}}
+
+	    # Make sure that MACOSX_DEPLOYMENT_TARGET is set in the
+	    # environment with a value that is the same as what we'll use
+	    # in the Makefile to ensure that we'll get the same compiler
+	    # environment during configure and build time.
+	    MACOSX_DEPLOYMENT_TARGET="$CONFIGURE_MACOSX_DEPLOYMENT_TARGET"
+	    export MACOSX_DEPLOYMENT_TARGET
+	    EXPORT_MACOSX_DEPLOYMENT_TARGET=''
+
 	    ;;
 	OSF*)
 	    BASECFLAGS="$BASECFLAGS -mieee"
@@ -13034,26 +13061,7 @@ then
 	Darwin/*)
 		# 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 ${cur_target} '>' 10.2; then
-			cur_target=10.3
-		fi
-		if test "${UNIVERSAL_ARCHS}" = "all"; then
-			# Ensure that the default platform for a 4-way
-			# universal build is OSX 10.5, that's the first
-			# OS release where 4-way builds make sense.
-			cur_target='10.5'
-		fi
-		CONFIGURE_MACOSX_DEPLOYMENT_TARGET=${MACOSX_DEPLOYMENT_TARGET-${cur_target}}
 
-		# Make sure that MACOSX_DEPLOYMENT_TARGET is set in the
-		# environment with a value that is the same as what we'll use
-		# in the Makefile to ensure that we'll get the same compiler
-		# environment during configure and build time.
-		MACOSX_DEPLOYMENT_TARGET="$CONFIGURE_MACOSX_DEPLOYMENT_TARGET"
-		export MACOSX_DEPLOYMENT_TARGET
-
-		EXPORT_MACOSX_DEPLOYMENT_TARGET=''
 		if test ${MACOSX_DEPLOYMENT_TARGET} '>' 10.2
 		then
 			if test "${enable_universalsdk}"; then
diff --git a/configure.in b/configure.in
index 7941f2dd742..67d7f969a11 100644
--- a/configure.in
+++ b/configure.in
@@ -903,6 +903,8 @@ yes)
 	Darwin*)
 	    # -Wno-long-double, -no-cpp-precomp, and -mno-fused-madd
 	    # used to be here, but non-Apple gcc doesn't accept them.
+
+
 	    if test "${enable_universalsdk}"; then
 		UNIVERSAL_ARCH_FLAGS=""
 	        if test "$UNIVERSAL_ARCHS" = "32-bit" ; then
@@ -923,9 +925,34 @@ yes)
 
 
 		BASECFLAGS="${UNIVERSAL_ARCH_FLAGS} -isysroot ${UNIVERSALSDK} ${BASECFLAGS}"
-		CFLAGS="${UNIVERSAL_ARCH_FLAGS} -isysroot ${UNIVERSALSDK} ${CFLAGS}"
+		tgt=`sw_vers -productVersion | sed 's/\(10\.[0-9]*\).*/\1/'`
+		if test "${UNIVERSALSDK}" != "/" -a "${tgt}" '>' '10.4' ; then
+			CFLAGS="${UNIVERSAL_ARCH_FLAGS} -isysroot ${UNIVERSALSDK} ${CFLAGS}"
+		fi
 	    fi
 
+	    # Calculate the right deployment target for this build.
+	    #
+	    cur_target=`sw_vers -productVersion | sed 's/\(10\.[[0-9]]*\).*/\1/'`
+	    if test ${cur_target} '>' 10.2; then
+		    cur_target=10.3
+	    fi
+	    if test "${UNIVERSAL_ARCHS}" = "all"; then
+		    # Ensure that the default platform for a 4-way
+		    # universal build is OSX 10.5, that's the first
+		    # OS release where 4-way builds make sense.
+		    cur_target='10.5'
+	    fi
+	    CONFIGURE_MACOSX_DEPLOYMENT_TARGET=${MACOSX_DEPLOYMENT_TARGET-${cur_target}}
+	    
+	    # Make sure that MACOSX_DEPLOYMENT_TARGET is set in the 
+	    # environment with a value that is the same as what we'll use
+	    # in the Makefile to ensure that we'll get the same compiler
+	    # environment during configure and build time.
+	    MACOSX_DEPLOYMENT_TARGET="$CONFIGURE_MACOSX_DEPLOYMENT_TARGET"
+	    export MACOSX_DEPLOYMENT_TARGET
+	    EXPORT_MACOSX_DEPLOYMENT_TARGET=''
+
 	    ;;
 	OSF*)
 	    BASECFLAGS="$BASECFLAGS -mieee"
@@ -1624,26 +1651,7 @@ then
 	Darwin/*)
 		# 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 ${cur_target} '>' 10.2; then
-			cur_target=10.3
-		fi
-		if test "${UNIVERSAL_ARCHS}" = "all"; then
-			# Ensure that the default platform for a 4-way
-			# universal build is OSX 10.5, that's the first
-			# OS release where 4-way builds make sense.
-			cur_target='10.5'
-		fi
-		CONFIGURE_MACOSX_DEPLOYMENT_TARGET=${MACOSX_DEPLOYMENT_TARGET-${cur_target}}
 
-		# Make sure that MACOSX_DEPLOYMENT_TARGET is set in the 
-		# environment with a value that is the same as what we'll use
-		# in the Makefile to ensure that we'll get the same compiler
-		# environment during configure and build time.
-		MACOSX_DEPLOYMENT_TARGET="$CONFIGURE_MACOSX_DEPLOYMENT_TARGET"
-		export MACOSX_DEPLOYMENT_TARGET
-
-		EXPORT_MACOSX_DEPLOYMENT_TARGET=''
 		if test ${MACOSX_DEPLOYMENT_TARGET} '>' 10.2
 		then
 			if test "${enable_universalsdk}"; then