auto import from //depot/cupcake/@135843
diff --git a/core/static_library.mk b/core/static_library.mk
new file mode 100644
index 0000000..252dfd0
--- /dev/null
+++ b/core/static_library.mk
@@ -0,0 +1,29 @@
+###########################################################
+## Standard rules for building a static library.
+##
+## Additional inputs from base_rules.make:
+## None.
+##
+## LOCAL_MODULE_SUFFIX will be set for you.
+###########################################################
+
+ifeq ($(strip $(LOCAL_MODULE_CLASS)),)
+LOCAL_MODULE_CLASS := STATIC_LIBRARIES
+endif
+ifeq ($(strip $(LOCAL_MODULE_SUFFIX)),)
+LOCAL_MODULE_SUFFIX := .a
+endif
+LOCAL_UNINSTALLABLE_MODULE := true
+
+include $(BUILD_SYSTEM)/binary.mk
+
+ifeq ($(LOCAL_RAW_STATIC_LIBRARY),true)
+LOCAL_RAW_STATIC_LIBRARY:=
+$(all_objects) : TARGET_PROJECT_INCLUDES :=
+$(all_objects) : TARGET_C_INCLUDES :=
+$(all_objects) : TARGET_GLOBAL_CFLAGS :=
+$(all_objects) : TARGET_GLOBAL_CPPFLAGS :=
+endif
+
+$(LOCAL_BUILT_MODULE): $(all_objects)
+ $(transform-o-to-static-lib)