Merge "Remove BUILD_DATETIME from Make." am: 4babe39d0f am: 03bca8c4a8
am: 649f5b3c9a

Change-Id: Iaf6c6240dce29da37b2b4dd30abbc7326a5464be
diff --git a/core/config.mk b/core/config.mk
index 8178dab..2b89231 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -847,7 +847,7 @@
 endif
 
 BUILD_NUMBER_FROM_FILE := $$(cat $(OUT_DIR)/build_number.txt)
-BUILD_DATETIME_FROM_FILE := $$(cat $(OUT_DIR)/build_date.txt)
+BUILD_DATETIME_FROM_FILE := $$(cat $(BUILD_DATETIME_FILE))
 
 # SEPolicy versions
 
diff --git a/core/main.mk b/core/main.mk
index d4543a3..bcce986 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -60,8 +60,7 @@
 # without changing the command line every time.  Avoids rebuilds
 # when using ninja.
 $(shell mkdir -p $(OUT_DIR) && \
-    echo -n $(BUILD_NUMBER) > $(OUT_DIR)/build_number.txt && \
-    echo -n $(BUILD_DATETIME) > $(OUT_DIR)/build_date.txt)
+    echo -n $(BUILD_NUMBER) > $(OUT_DIR)/build_number.txt)
 ifeq ($(HOST_OS),darwin)
 DATE_FROM_FILE := date -r $(BUILD_DATETIME_FROM_FILE)
 else
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index 25acbf7..4bc97eb 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -24,7 +24,6 @@
 #     DEFAULT_APP_TARGET_SDK
 #     BUILD_ID
 #     BUILD_NUMBER
-#     BUILD_DATETIME
 #     PLATFORM_SECURITY_PATCH
 #     PLATFORM_VNDK_VERSION
 #     PLATFORM_SYSTEMSDK_VERSIONS
@@ -255,16 +254,10 @@
   BUILD_ID := UNKNOWN
 endif
 
-ifndef BUILD_DATETIME
-  # Used to reproduce builds by setting the same time. Must be the number
-  # of seconds since the Epoch.
-  BUILD_DATETIME := $(shell date +%s)
-endif
-
 ifneq (,$(findstring Darwin,$(UNAME)))
-DATE := date -r $(BUILD_DATETIME)
+DATE := date -r $(shell cat $(BUILD_DATETIME_FILE))
 else
-DATE := date -d @$(BUILD_DATETIME)
+DATE := date -d @$(shell cat $(BUILD_DATETIME_FILE))
 endif
 
 ifndef BUILD_NUMBER