Index: configure.in
===================================================================
--- configure.in	(revision 65023)
+++ configure.in	(working copy)
@@ -918,7 +918,10 @@
 
 
 		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 [ "${UNIVERSALSDK}" != "/" -a "${tgt}" '>' '10.4' ]; then
+			CFLAGS="${UNIVERSAL_ARCH_FLAGS} -isysroot ${UNIVERSALSDK} ${CFLAGS}"
+		fi
 	    fi
 
 	    ;;