It's turned off for now.
Change-Id: I0b5a3ce5fdc7693c8ebd870312f0c2e13fdb8b22
endef
###########################################################
+## Run rot13 on a string
+## $(1): the string. Must be one line.
+###########################################################
+define rot13
+$(shell echo $(1) | tr 'a-zA-Z' 'n-za-mN-ZA-M')
+endef
+
+
+###########################################################
+## Returns true if $(1) and $(2) are equal. Returns
+## the empty string if they are not equal.
+###########################################################
+define streq
+$(strip $(if $(strip $(1)),\
+ $(if $(strip $(2)),\
+ $(if $(filter-out __,_$(subst $(strip $(1)),,$(strip $(2)))$(subst $(strip $(2)),,$(strip $(1)))_),,true), \
+ ),\
+ $(if $(strip $(2)),\
+ ,\
+ true)\
+ ))
+endef
+
+###########################################################
## Convert "a b c" into "a:b:c"
###########################################################
endif # !SDK_ONLY
+# Before we go and include all of the module makefiles, stash away
+# the PRODUCT_* values so you can't get to them.
+stash_product_vars:=#true
+ifeq ($(stash_product_vars),true)
+ $(call stash-product-vars, __STASHED, DO_NOT_USE_IN_ANDROID_MK_)
+endif
+
ifneq ($(ONE_SHOT_MAKEFILE),)
# We've probably been invoked by the "mm" shell function
# with a subdirectory's makefile.
include $(subdir_makefiles)
endif # ONE_SHOT_MAKEFILE
+ifeq ($(stash_product_vars),true)
+ $(call assert-product-vars, __STASHED, DO_NOT_USE_IN_ANDROID_MK_)
+ $(call restore-product-vars, __STASHED)
+endif
+
# -------------------------------------------------------------------
# All module makefiles have been included at this point.
# -------------------------------------------------------------------
define resolve-short-product-name
$(strip $(call _resolve-short-product-name,$(1)))
endef
+
+
+#
+# Rename the variables in _product_var_list.
+# $(1): Renamed prefix
+# $(2): New value prefix. The new value will be $(2)$(VARNAME)
+#
+define stash-product-vars
+$(foreach v,$(_product_var_list), \
+ $(eval $(strip $(1))_$(call rot13,$(v)):=$$($$(v))) \
+ $(eval $(v):=$(2)$$(v)) \
+ )
+endef
+
+#
+# Assert that the the variable stashed by stash-product-vars remains untouched.
+# $(1): The prefix as supplied to stash-product-vars
+# $(2): The expected value prefix. The value should be $(2)$(VARNAME)
+#
+define assert-product-vars
+$(strip \
+ $(eval changed_variables:=)
+ $(foreach v,$(_product_var_list), \
+ $(if $(call streq,$($(v)),$(2)$(v)),, \
+ $(eval $(warning $(v) has been modified: $($(v)))) \
+ $(eval changed_variables := $(changed_variables) $(v))) \
+ ) \
+ $(if $(changed_variables),\
+ $(eval $(error The following variables have been changed: $(changed_variables))),)
+)
+endef
+# ... $(eval $(warning $(v) $($(v)),$(2)$(v) streq-->$(call streq,$($(v)),$(2)$(v)))) \
+
+#
+# Restore the product variables as stashed by stash-product-vars
+# $(1): The prefix as supplied to stash-product-vars
+#
+define restore-product-vars
+$(foreach v,$(_product_var_list), \
+ $(eval $(v):=$($(strip $(1))_$(call rot13,$(v)))) \
+ $(eval $(strip $(1))_$(v):=) \
+ )
+endef
+