diff --git a/core/dex_preopt_libart_boot.mk b/core/dex_preopt_libart_boot.mk
index afd61eb..253afe2 100644
--- a/core/dex_preopt_libart_boot.mk
+++ b/core/dex_preopt_libart_boot.mk
@@ -48,7 +48,7 @@
 $($(my_2nd_arch_prefix)DEFAULT_DEX_PREOPT_BUILT_IMAGE_FILENAME): PRIVATE_2ND_ARCH_VAR_PREFIX := $(my_2nd_arch_prefix)
 # Use dex2oat debug version for better error reporting
 $($(my_2nd_arch_prefix)DEFAULT_DEX_PREOPT_BUILT_IMAGE_FILENAME) : $(LIBART_TARGET_BOOT_DEX_FILES) $(DEX2OAT_DEPENDENCY)
-	@echo "target dex2oat: $@ ($?)"
+	@echo "target dex2oat: $@"
 	@mkdir -p $(dir $@)
 	@mkdir -p $(dir $($(PRIVATE_2ND_ARCH_VAR_PREFIX)LIBART_TARGET_BOOT_OAT_UNSTRIPPED))
 	$(hide) $(DEX2OAT) --runtime-arg -Xms$(DEX2OAT_IMAGE_XMS) --runtime-arg -Xmx$(DEX2OAT_IMAGE_XMX) \
diff --git a/core/host_dalvik_java_library.mk b/core/host_dalvik_java_library.mk
index 59ecf4e..62ef452 100644
--- a/core/host_dalvik_java_library.mk
+++ b/core/host_dalvik_java_library.mk
@@ -126,7 +126,7 @@
 $(built_dex): PRIVATE_JACK_VERSION := $(LOCAL_JACK_VERSION)
 $(built_dex): $(java_sources) $(java_resource_sources) $(full_jack_lib_deps) \
         $(jar_manifest_file) $(proto_java_sources_file_stamp) $(LOCAL_MODULE_MAKEFILE_DEP) \
-        $(LOCAL_ADDITIONAL_DEPENDENCIES) $(JACK)
+        $(LOCAL_ADDITIONAL_DEPENDENCIES) $(JACK) | setup-jack-server
 	@echo Building with Jack: $@
 	$(jack-java-to-dex)
 
diff --git a/core/host_dalvik_static_java_library.mk b/core/host_dalvik_static_java_library.mk
index 6248e1a..6a680b4 100644
--- a/core/host_dalvik_static_java_library.mk
+++ b/core/host_dalvik_static_java_library.mk
@@ -49,7 +49,7 @@
 $(full_classes_jack): $(java_sources) $(java_resource_sources) $(full_jack_lib_deps) \
         $(jar_manifest_file) $(layers_file) $(LOCAL_MODULE_MAKEFILE_DEP) \
         $(LOCAL_ADDITIONAL_DEPENDENCIES) $(LOCAL_JARJAR_RULES) \
-        $(JACK)
+        $(JACK) | setup-jack-server
 	@echo Building with Jack: $@
 	$(java-to-jack)
 
diff --git a/core/host_native_test.mk b/core/host_native_test.mk
index b54bd3a..7cba1ae 100644
--- a/core/host_native_test.mk
+++ b/core/host_native_test.mk
@@ -5,4 +5,22 @@
 
 include $(BUILD_SYSTEM)/host_test_internal.mk
 
+needs_symlink :=
+ifndef LOCAL_MULTILIB
+  ifndef LOCAL_32_BIT_ONLY
+    LOCAL_MULTILIB := both
+
+    ifeq (,$(LOCAL_MODULE_STEM_32)$(LOCAL_MODULE_STEM_64))
+      LOCAL_MODULE_STEM_32 := $(LOCAL_MODULE)32
+      LOCAL_MODULE_STEM_64 := $(LOCAL_MODULE)64
+      needs_symlink := true
+    endif
+  endif
+endif
+
 include $(BUILD_HOST_EXECUTABLE)
+
+ifdef needs_symlink
+include $(BUILD_SYSTEM)/executable_prefer_symlink.mk
+needs_symlink :=
+endif
diff --git a/core/java.mk b/core/java.mk
index f6f52dc..a0ab4c5 100644
--- a/core/java.mk
+++ b/core/java.mk
@@ -654,7 +654,7 @@
         $(LOCAL_MODULE_MAKEFILE_DEP) $(JACK)
 
 ifeq ($(LOCAL_IS_STATIC_JAVA_LIBRARY),true)
-$(full_classes_jack): $(jack_all_deps)
+$(full_classes_jack): $(jack_all_deps) | setup-jack-server
 	@echo Building with Jack: $@
 	$(java-to-jack)
 
@@ -666,7 +666,7 @@
 else #LOCAL_IS_STATIC_JAVA_LIBRARY
 $(built_dex_intermediate): PRIVATE_CLASSES_JACK := $(full_classes_jack)
 
-$(built_dex_intermediate): $(jack_all_deps)
+$(built_dex_intermediate): $(jack_all_deps) | setup-jack-server
 	@echo Building with Jack: $@
 	$(jack-java-to-dex)
 
@@ -687,7 +687,7 @@
 $(noshrob_classes_jack): PRIVATE_JACK_INCREMENTAL_DIR :=
 endif
 $(noshrob_classes_jack): PRIVATE_JACK_PROGUARD_FLAGS :=
-$(noshrob_classes_jack): $(jack_all_deps)
+$(noshrob_classes_jack): $(jack_all_deps) | setup-jack-server
 	@echo Building with Jack: $@
 	$(java-to-jack)
 endif  # full_classes_jar is defined
diff --git a/core/main.mk b/core/main.mk
index c29731c..2ca52c7 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -324,6 +324,11 @@
 -include $(TOPDIR)prebuilts/sdk/tools/jack_versions.mk
 -include $(TOPDIR)prebuilts/sdk/tools/jack_for_module.mk
 
+#
+# -----------------------------------------------------------------
+# Install and start Jack server
+-include $(TOPDIR)prebuilts/sdk/tools/jack_server_setup.mk
+
 # -----------------------------------------------------------------
 ###
 ### In this section we set up the things that are different
diff --git a/core/prebuilt_internal.mk b/core/prebuilt_internal.mk
index b0af228..601a79c 100644
--- a/core/prebuilt_internal.mk
+++ b/core/prebuilt_internal.mk
@@ -325,7 +325,7 @@
 ifeq ($(LOCAL_MODULE_CLASS),JAVA_LIBRARIES)
 $(intermediates.COMMON)/classes.jack : PRIVATE_JILL_FLAGS:=$(LOCAL_JILL_FLAGS)
 $(intermediates.COMMON)/classes.jack : $(my_src_jar) $(LOCAL_MODULE_MAKEFILE_DEP) \
-        $(LOCAL_ADDITIONAL_DEPENDENCIES) $(JILL_JAR) $(JACK)
+        $(LOCAL_ADDITIONAL_DEPENDENCIES) $(JILL_JAR) $(JACK) | setup-jack-server
 	$(transform-jar-to-jack)
 
 # Update timestamps of .toc files for prebuilts so dependents will be