-MAC_OS_X_VERSION_MIN_REQUIRED=1070
-OSX_HOST_VERSION_MIN_STRING=10.7
-IOS_VERSION_TARGET_STRING=7.0
-OSX_VERSION_TARGET_STRING=10.9
+MAC_OS_X_VERSION_MIN_REQUIRED=1090
+OSX_HOST_VERSION_MIN_STRING=10.9
+ifndef IPHONEOS_DEPLOYMENT_TARGET
+ IOS_VERSION_TARGET_STRING=9.0
+else ifeq "$(IPHONEOS_DEPLOYMENT_TARGET)" ""
+ IOS_VERSION_TARGET_STRING=9.0
+else
+ IOS_VERSION_TARGET_STRING=$(IPHONEOS_DEPLOYMENT_TARGET)
+endif
+ifndef MACOSX_DEPLOYMENT_TARGET
+ OSX_VERSION_TARGET_STRING=10.11
+else ifeq "$(MACOSX_DEPLOYMENT_TARGET)" ""
+ OSX_VERSION_TARGET_STRING=10.11
+else
+ OSX_VERSION_TARGET_STRING=$(MACOSX_DEPLOYMENT_TARGET)
+endif
+ifndef WATCHOS_DEPLOYMENT_TARGET
+ WATCHOS_VERSION_TARGET_STRING=2.0
+else ifeq "$(WATCHOS_DEPLOYMENT_TARGET)" ""
+ WATCHOS_VERSION_TARGET_STRING=2.0
+else
+ WATCHOS_VERSION_TARGET_STRING=$(WATCHOS_DEPLOYMENT_TARGET)
+endif
+ifndef TVOS_DEPLOYMENT_TARGET
+ TVOS_VERSION_TARGET_STRING=9.0
+else ifeq "$(TVOS_DEPLOYMENT_TARGET)" ""
+ TVOS_VERSION_TARGET_STRING=9.0
+else
+ TVOS_VERSION_TARGET_STRING=$(TVOS_DEPLOYMENT_TARGET)
+endif