+DEVELOPER_PATH=`xcode-select --print-path`
+# Around Xcode 4.3, SDKs were moved from the Developer folder into the
+# MacOSX.platform folder
+if test -d "$DEVELOPER_PATH/Platforms/MacOSX.platform/Developer/SDKs"; then
+ SDK_PATH="$DEVELOPER_PATH/Platforms/MacOSX.platform/Developer/SDKs"
+else
+ SDK_PATH="$DEVELOPER_PATH/SDKs";
+fi
+OLD_SDK=`ls $SDK_PATH|head -1`
+NEW_SDK=`ls -r $SDK_PATH|head -1`