diff --git a/core/config.mk b/core/config.mk
index f74f5b4..e75fdcb 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -560,6 +560,7 @@
 MAKEPARALLEL := $(prebuilt_build_tools_bin)/makeparallel
 SOONG_JAVAC_WRAPPER := $(SOONG_HOST_OUT_EXECUTABLES)/soong_javac_wrapper
 SOONG_ZIP := $(SOONG_HOST_OUT_EXECUTABLES)/soong_zip
+MERGE_ZIPS := $(SOONG_HOST_OUT_EXECUTABLES)/merge_zips
 ZIP2ZIP := $(SOONG_HOST_OUT_EXECUTABLES)/zip2zip
 ZIPTIME := $(prebuilt_build_tools_bin)/ziptime
 
diff --git a/core/definitions.mk b/core/definitions.mk
index ffeb663..90fa0fe 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -2243,7 +2243,6 @@
 $(hide) rm -rf $(PRIVATE_CLASS_INTERMEDIATES_DIR) $(PRIVATE_ANNO_INTERMEDIATES_DIR)
 $(hide) mkdir -p $(dir $@)
 $(hide) mkdir -p $(PRIVATE_CLASS_INTERMEDIATES_DIR) $(PRIVATE_ANNO_INTERMEDIATES_DIR)
-$(call unzip-jar-files,$(PRIVATE_STATIC_JAVA_LIBRARIES),$(PRIVATE_CLASS_INTERMEDIATES_DIR))
 $(hide) if [ -s $(PRIVATE_JAVA_SOURCE_LIST) ] ; then \
     $(SOONG_JAVAC_WRAPPER) $(1) -encoding UTF-8 \
     $(if $(findstring true,$(PRIVATE_WARNINGS_ENABLE)),$(xlint_unchecked),) \
@@ -2291,19 +2290,18 @@
 @mkdir $(dir $@)/classes-turbine
 $(hide) if [ -s $(PRIVATE_JAVA_SOURCE_LIST) ] ; then \
     $(JAVA) -jar $(TURBINE) \
-    --output $@.tmp --temp_dir $(dir $@)/classes-turbine -$(PRIVATE_BOOTCLASSPATH) \
+    --output $@.premerged --temp_dir $(dir $@)/classes-turbine -$(PRIVATE_BOOTCLASSPATH) \
     --sources \@$(PRIVATE_JAVA_SOURCE_LIST) \
     --javacopts $(PRIVATE_JAVACFLAGS) $(COMMON_JDK_FLAGS) \
     $(addprefix --classpath ,$(strip \
         $(call normalize-path-list,$(PRIVATE_ALL_JAVA_HEADER_LIBRARIES)))) \
     || ( rm -rf $(dir $@)/classes-turbine ; exit 41 ) \
 fi
-$(hide) $(call unzip-jar-files,$(PRIVATE_STATIC_JAVA_HEADER_LIBRARIES),$(dir $@)/classes-turbine)
-$(hide) if [ -s $@.tmp ] ; then \
-    unzip -qo $@.tmp -d $(dir $@)/classes-turbine; rm -f $(dir $@)/classes-turbine/module-info.class; \
+$(hide) if [ -s $@.premerged ] ; then \
+    $(MERGE_ZIPS) -j -stripDir META-INF $@.tmp $@.premerged $(call reverse-list,$(PRIVATE_STATIC_JAVA_HEADER_LIBRARIES)) ; \
+else \
+    $(MERGE_ZIPS) -j -stripDir META-INF $@.tmp $(call reverse-list,$(PRIVATE_STATIC_JAVA_HEADER_LIBRARIES)) ; \
 fi
-$(hide) $(if $(PRIVATE_DONT_DELETE_JAR_META_INF),,$(hide) rm -rf $(dir $@)/classes-turbine/META-INF)
-$(hide) $(JAR) -cf $@.tmp $(call jar-args-sorted-files-in-directory,$(dir $@)/classes-turbine)
 $(hide) $(ZIPTIME) $@.tmp
 $(hide) $(call commit-change-for-toc,$@)
 endef
diff --git a/core/droiddoc.mk b/core/droiddoc.mk
index 2676b44..45b8af0 100644
--- a/core/droiddoc.mk
+++ b/core/droiddoc.mk
@@ -57,7 +57,6 @@
 $(full_target): PRIVATE_BOOTCLASSPATH :=
 full_java_libs := $(addprefix $(HOST_OUT_JAVA_LIBRARIES)/,\
   $(addsuffix $(COMMON_JAVA_PACKAGE_SUFFIX),$(LOCAL_JAVA_LIBRARIES)))
-full_java_lib_deps := $(full_java_libs)
 
 else
 
@@ -83,7 +82,6 @@
 LOCAL_JAVA_LIBRARIES := $(sort $(LOCAL_JAVA_LIBRARIES))
 
 full_java_libs := $(call java-lib-files,$(LOCAL_JAVA_LIBRARIES)) $(LOCAL_CLASSPATH)
-full_java_lib_deps := $(call java-lib-deps,$(LOCAL_JAVA_LIBRARIES)) $(LOCAL_CLASSPATH)
 endif # !LOCAL_IS_HOST_MODULE
 
 $(full_target): PRIVATE_CLASSPATH := $(call normalize-path-list,$(full_java_libs))
@@ -174,7 +172,7 @@
         $(droiddoc_templates) \
         $(droiddoc) \
         $(html_dir_files) \
-        $(full_java_lib_deps) \
+        $(full_java_libs) \
         $(LOCAL_ADDITIONAL_DEPENDENCIES)
 	@echo Docs droiddoc: $(PRIVATE_OUT_DIR)
 	$(hide) mkdir -p $(dir $@)
@@ -226,7 +224,7 @@
 $(full_target): PRIVATE_BOOTCLASSPATH_ARG := $(addprefix -bootclasspath ,$(PRIVATE_BOOTCLASSPATH))
 endif
 
-$(full_target): $(full_src_files) $(full_java_lib_deps)
+$(full_target): $(full_src_files) $(full_java_libs)
 	@echo Docs javadoc: $(PRIVATE_OUT_DIR)
 	@mkdir -p $(dir $@)
 	$(call prepare-doc-source-list,$(PRIVATE_SRC_LIST_FILE),$(PRIVATE_JAVA_FILES), \
diff --git a/core/host_dalvik_java_library.mk b/core/host_dalvik_java_library.mk
index 37e9375..e42f499 100644
--- a/core/host_dalvik_java_library.mk
+++ b/core/host_dalvik_java_library.mk
@@ -46,6 +46,7 @@
 full_classes_header_jarjar := $(intermediates.COMMON)/classes-header-jarjar.jar
 full_classes_header_jar := $(intermediates.COMMON)/classes-header.jar
 full_classes_compiled_jar := $(intermediates.COMMON)/classes-full-debug.jar
+full_classes_combined_jar := $(intermediates.COMMON)/classes-combined.jar
 full_classes_desugar_jar := $(intermediates.COMMON)/desugar.classes.jar
 full_classes_jarjar_jar := $(intermediates.COMMON)/classes-jarjar.jar
 full_classes_jar := $(intermediates.COMMON)/classes.jar
@@ -57,6 +58,7 @@
 LOCAL_INTERMEDIATE_TARGETS += \
     $(full_classes_turbine_jar) \
     $(full_classes_compiled_jar) \
+    $(full_classes_combined_jar) \
     $(full_classes_desugar_jar) \
     $(full_classes_jarjar_jar) \
     $(full_classes_jack) \
@@ -110,7 +112,6 @@
     $(java_source_list_file) \
     $(java_sources_deps) \
     $(full_java_header_libs) \
-    $(full_static_java_libs) \
     $(jar_manifest_file) \
     $(annotation_processor_deps) \
     $(NORMALIZE_PATH) \
@@ -128,7 +129,8 @@
     $(NORMALIZE_PATH) \
     $(JAR_ARGS) \
     $(ZIPTIME) \
-    | $(TURBINE)
+    | $(TURBINE) \
+    $(MERGE_ZIPS)
 	$(transform-java-to-header.jar)
 
 .KATI_RESTAT: $(full_classes_turbine_jar)
@@ -145,14 +147,21 @@
 
 $(eval $(call copy-one-file,$(full_classes_header_jarjar),$(full_classes_header_jar)))
 
+$(full_classes_combined_jar): PRIVATE_DONT_DELETE_JAR_META_INF := $(LOCAL_DONT_DELETE_JAR_META_INF)
+$(full_classes_combined_jar): $(full_classes_compiled_jar) \
+                              $(full_static_java_libs)  | $(MERGE_ZIPS)
+	$(MERGE_ZIPS) -j \
+        $(if $(PRIVATE_DONT_DELETE_JAR_META_INF),,-stripDir META-INF -zipToNotStrip $<) \
+        $@ $< $(call reverse-list,$(PRIVATE_STATIC_JAVA_LIBRARIES))
+
 # Run jarjar if necessary, otherwise just copy the file.
 ifneq ($(strip $(LOCAL_JARJAR_RULES)),)
 $(full_classes_jarjar_jar): PRIVATE_JARJAR_RULES := $(LOCAL_JARJAR_RULES)
-$(full_classes_jarjar_jar): $(full_classes_compiled_jar) $(LOCAL_JARJAR_RULES) | $(JARJAR)
+$(full_classes_jarjar_jar): $(full_classes_combined_jar) $(LOCAL_JARJAR_RULES) | $(JARJAR)
 	@echo JarJar: $@
 	$(hide) $(JAVA) -jar $(JARJAR) process $(PRIVATE_JARJAR_RULES) $< $@
 else
-full_classes_jarjar_jar := $(full_classes_compiled_jar)
+full_classes_jarjar_jar := $(full_classes_combined_jar)
 endif
 
 $(eval $(call copy-one-file,$(full_classes_jarjar_jar),$(full_classes_jar)))
diff --git a/core/host_java_library.mk b/core/host_java_library.mk
index adc30dd..55b6684 100644
--- a/core/host_java_library.mk
+++ b/core/host_java_library.mk
@@ -36,11 +36,13 @@
 full_classes_jar := $(intermediates.COMMON)/classes.jar
 java_source_list_file := $(intermediates.COMMON)/java-source-list
 full_classes_header_jar := $(intermediates.COMMON)/classes-header.jar
+full_classes_combined_jar := $(intermediates.COMMON)/classes-combined.jar
 
 LOCAL_INTERMEDIATE_TARGETS += \
     $(full_classes_compiled_jar) \
     $(full_classes_jarjar_jar) \
-    $(java_source_list_file)
+    $(java_source_list_file) \
+    $(full_classes_combined_jar)
 
 #######################################
 include $(BUILD_SYSTEM)/base_rules.mk
@@ -79,7 +81,7 @@
 $(full_classes_compiled_jar): \
     $(java_source_list_file) \
     $(java_sources_deps) \
-    $(full_java_lib_deps) \
+    $(full_java_libs) \
     $(jar_manifest_file) \
     $(annotation_processor_deps) \
     $(NORMALIZE_PATH) \
@@ -92,14 +94,18 @@
 javac-check : $(full_classes_compiled_jar)
 javac-check-$(LOCAL_MODULE) : $(full_classes_compiled_jar)
 
+$(full_classes_combined_jar): $(full_classes_compiled_jar) \
+                              $(full_static_java_libs) | $(MERGE_ZIPS)
+	$(MERGE_ZIPS) -j -stripDir META-INF -zipToNotStrip $< $@ $< $(call reverse-list,$(PRIVATE_STATIC_JAVA_LIBRARIES))
+
 # Run jarjar if necessary, otherwise just copy the file.
 ifneq ($(strip $(LOCAL_JARJAR_RULES)),)
 $(full_classes_jarjar_jar): PRIVATE_JARJAR_RULES := $(LOCAL_JARJAR_RULES)
-$(full_classes_jarjar_jar): $(full_classes_compiled_jar) $(LOCAL_JARJAR_RULES) | $(JARJAR)
+$(full_classes_jarjar_jar): $(full_classes_combined_jar) $(LOCAL_JARJAR_RULES) | $(JARJAR)
 	@echo JarJar: $@
 	$(hide) $(JAVA) -jar $(JARJAR) process $(PRIVATE_JARJAR_RULES) $< $@
 else
-full_classes_jarjar_jar := $(full_classes_compiled_jar)
+full_classes_jarjar_jar := $(full_classes_combined_jar)
 endif
 
 
diff --git a/core/java.mk b/core/java.mk
index b2d3833..3b68576 100644
--- a/core/java.mk
+++ b/core/java.mk
@@ -122,6 +122,7 @@
 jarjar_leaf := classes-jarjar.jar
 full_classes_jarjar_jar := $(intermediates.COMMON)/$(jarjar_leaf)
 full_classes_proguard_jar := $(intermediates.COMMON)/classes-proguard.jar
+full_classes_combined_jar := $(intermediates.COMMON)/classes-combined.jar
 built_dex_intermediate := $(intermediates.COMMON)/$(built_dex_intermediate_leaf)/classes.dex
 full_classes_stubs_jar := $(intermediates.COMMON)/stubs.jar
 java_source_list_file := $(intermediates.COMMON)/java-source-list
@@ -147,6 +148,7 @@
     $(full_classes_desugar_jar) \
     $(full_classes_jarjar_jar) \
     $(full_classes_jar) \
+    $(full_classes_combined_jar) \
     $(full_classes_proguard_jar) \
     $(built_dex_intermediate) \
     $(full_classes_jack) \
@@ -461,7 +463,6 @@
     $(java_source_list_file) \
     $(java_sources_deps) \
     $(full_java_header_libs) \
-    $(full_static_java_libs) \
     $(jar_manifest_file) \
     $(layers_file) \
     $(annotation_processor_deps) \
@@ -481,7 +482,8 @@
     $(NORMALIZE_PATH) \
     $(JAR_ARGS) \
     $(ZIPTIME) \
-    | $(TURBINE)
+    | $(TURBINE) \
+    $(MERGE_ZIPS)
 	$(transform-java-to-header.jar)
 
 .KATI_RESTAT: $(full_classes_turbine_jar)
@@ -501,12 +503,19 @@
 javac-check : $(full_classes_compiled_jar)
 javac-check-$(LOCAL_MODULE) : $(full_classes_compiled_jar)
 
+$(full_classes_combined_jar): PRIVATE_DONT_DELETE_JAR_META_INF := $(LOCAL_DONT_DELETE_JAR_META_INF)
+$(full_classes_combined_jar): $(full_classes_compiled_jar) \
+                              $(full_static_java_libs) | $(MERGE_ZIPS)
+	$(MERGE_ZIPS) -j \
+        $(if $(PRIVATE_DONT_DELETE_JAR_META_INF),,-stripDir META-INF -zipToNotStrip $<) \
+        $@ $< $(call reverse-list,$(PRIVATE_STATIC_JAVA_LIBRARIES))
+
 ifdef LOCAL_JAR_PROCESSOR
 # LOCAL_JAR_PROCESSOR_ARGS must be evaluated here to set up the rule-local
 # PRIVATE_JAR_PROCESSOR_ARGS variable, but $< and $@ are not available yet.
 # Set ${in} and ${out} so they can be referenced by LOCAL_JAR_PROCESSOR_ARGS
 # using deferred evaluation (LOCAL_JAR_PROCESSOR_ARGS = instead of :=).
-in := $(full_classes_compiled_jar)
+in := $(full_classes_combined_jar)
 out := $(full_classes_processed_jar).tmp
 my_jar_processor := $(HOST_OUT_JAVA_LIBRARIES)/$(LOCAL_JAR_PROCESSOR).jar
 
@@ -516,7 +525,7 @@
 in :=
 out :=
 
-$(full_classes_processed_jar): $(full_classes_compiled_jar) $(my_jar_processor)
+$(full_classes_processed_jar): $(full_classes_combined_jar) $(my_jar_processor)
 	@echo Processing $@ with $(PRIVATE_JAR_PROCESSOR)
 	$(hide) rm -f $@ $(PRIVATE_TMP_OUT)
 	$(hide) $(JAVA) -jar $(PRIVATE_JAR_PROCESSOR) $(PRIVATE_JAR_PROCESSOR_ARGS)
@@ -524,7 +533,7 @@
 
 my_jar_processor :=
 else
-full_classes_processed_jar := $(full_classes_compiled_jar)
+full_classes_processed_jar := $(full_classes_combined_jar)
 endif
 
 # Run jarjar if necessary
diff --git a/core/java_common.mk b/core/java_common.mk
index 17803f8..dcd3603 100644
--- a/core/java_common.mk
+++ b/core/java_common.mk
@@ -156,7 +156,7 @@
 annotation_processor_deps :=
 
 ifdef LOCAL_ANNOTATION_PROCESSORS
-  annotation_processor_jars := $(call java-lib-deps,$(LOCAL_ANNOTATION_PROCESSORS),true)
+  annotation_processor_jars := $(call java-lib-files,$(LOCAL_ANNOTATION_PROCESSORS),true)
   annotation_processor_flags += -processorpath $(call normalize-path-list,$(annotation_processor_jars))
   annotation_processor_deps += $(annotation_processor_jars)
 
@@ -195,9 +195,6 @@
 
 # full_java_libs: The list of files that should be used as the classpath.
 #                 Using this list as a dependency list WILL NOT WORK.
-# full_java_lib_deps: Should be specified as a prerequisite of this module
-#                 to guarantee that the files in full_java_libs will
-#                 be up-to-date.
 ifndef LOCAL_IS_HOST_MODULE
 ifeq ($(LOCAL_SDK_VERSION),)
 ifeq ($(LOCAL_NO_STANDARD_LIBRARIES),true)
@@ -234,8 +231,6 @@
 
 full_shared_java_libs := $(call java-lib-files,$(LOCAL_JAVA_LIBRARIES) $(my_additional_javac_libs),$(LOCAL_IS_HOST_MODULE))
 full_shared_java_header_libs := $(call java-lib-header-files,$(LOCAL_JAVA_LIBRARIES) $(my_additional_javac_libs),$(LOCAL_IS_HOST_MODULE))
-full_java_lib_deps := $(call java-lib-deps,$(LOCAL_JAVA_LIBRARIES) $(my_additional_javac_libs),$(LOCAL_IS_HOST_MODULE))
-full_java_lib_deps := $(addsuffix .toc, $(full_java_lib_deps))
 
 else # LOCAL_IS_HOST_MODULE
 
@@ -249,22 +244,17 @@
 
 full_shared_java_libs := $(call java-lib-files,$(LOCAL_JAVA_LIBRARIES),true)
 full_shared_java_header_libs := $(call java-lib-header-files,$(LOCAL_JAVA_LIBRARIES),true)
-full_java_lib_deps := $(full_shared_java_libs)
 else # !USE_CORE_LIB_BOOTCLASSPATH
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_BOOTCLASSPATH :=
 
 full_shared_java_libs := $(addprefix $(HOST_OUT_JAVA_LIBRARIES)/,\
     $(addsuffix $(COMMON_JAVA_PACKAGE_SUFFIX),$(LOCAL_JAVA_LIBRARIES)))
-full_java_lib_deps := $(full_shared_java_libs)
 endif # USE_CORE_LIB_BOOTCLASSPATH
 endif # !LOCAL_IS_HOST_MODULE
 
-# Only host java libraries use LOCAL_CLASSPATH.
 full_java_libs := $(full_shared_java_libs) $(full_static_java_libs) $(LOCAL_CLASSPATH)
 full_java_header_libs := $(full_shared_java_header_libs) $(full_static_java_header_libs)
 
-full_java_lib_deps := $(full_java_lib_deps) $(full_static_java_libs) $(LOCAL_CLASSPATH)
-
 ifndef LOCAL_IS_HOST_MODULE
 # This is set by packages that are linking to other packages that export
 # shared libraries, allowing them to make use of the code in the linked apk.
@@ -274,12 +264,15 @@
       $(foreach lib,$(apk_libraries), \
         $(call intermediates-dir-for, \
               APPS,$(lib),,COMMON)/classes-pre-proguard.jar)
+  link_apk_header_libs := \
+      $(foreach lib,$(apk_libraries), \
+        $(call intermediates-dir-for, \
+              APPS,$(lib),,COMMON)/classes-header.jar)
 
   # link against the jar with full original names (before proguard processing).
   full_shared_java_libs += $(link_apk_libraries)
   full_java_libs += $(link_apk_libraries)
-  full_java_header_libs += $(link_apk_libraries)
-  full_java_lib_deps += $(link_apk_libraries)
+  full_java_header_libs += $(link_apk_header_libs)
 endif
 
 # This is set by packages that contain instrumentation, allowing them to
@@ -296,9 +289,9 @@
       APPS,$(LOCAL_INSTRUMENTATION_FOR),,COMMON)
   # link against the jar with full original names (before proguard processing).
   link_instr_classes_jar := $(link_instr_intermediates_dir.COMMON)/classes-pre-proguard.jar
+  link_instr_classes_header_jar := $(link_instr_intermediates_dir.COMMON)/classes-header.jar
   full_java_libs += $(link_instr_classes_jar)
-  full_java_header_libs += $(link_instr_classes_jar)
-  full_java_lib_deps += $(link_instr_classes_jar)
+  full_java_header_libs += $(link_instr_classes_header_jar)
 endif  # LOCAL_INSTRUMENTATION_FOR
 endif  # LOCAL_IS_HOST_MODULE