diff --git a/core/base_rules.mk b/core/base_rules.mk
index e4a6626..e252b95 100644
--- a/core/base_rules.mk
+++ b/core/base_rules.mk
@@ -279,8 +279,6 @@
 # checked modules, use LOCAL_BUILT_MODULE.
 ifdef LOCAL_CHECKED_MODULE
   my_checked_module := $(LOCAL_CHECKED_MODULE)
-else ifdef java_alternative_checked_module
-  my_checked_module := $(java_alternative_checked_module)
 else
   my_checked_module := $(LOCAL_BUILT_MODULE)
 endif
diff --git a/core/combo/javac.mk b/core/combo/javac.mk
index e3838a6..d00f541 100644
--- a/core/combo/javac.mk
+++ b/core/combo/javac.mk
@@ -35,6 +35,8 @@
     $(info CUSTOM_JAVA_COMPILER=eclipse)
 endif
 
+GLOBAL_JAVAC_DEBUG_FLAGS := -g
+
 HOST_JAVAC ?= $(COMMON_JAVAC)
 TARGET_JAVAC ?= $(COMMON_JAVAC)
 
diff --git a/core/definitions.mk b/core/definitions.mk
index 5e18242..8480512 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -1734,7 +1734,6 @@
     | sort -u > $(PRIVATE_CLASS_INTERMEDIATES_DIR)/java-source-list-uniq
 $(hide) if [ -s $(PRIVATE_CLASS_INTERMEDIATES_DIR)/java-source-list-uniq ] ; then \
     $(1) -encoding UTF-8 \
-    $(strip $(PRIVATE_JAVAC_DEBUG_FLAGS)) \
     $(if $(findstring true,$(PRIVATE_WARNINGS_ENABLE)),$(xlint_unchecked),) \
     $(2) \
     $(addprefix -classpath ,$(strip \
@@ -1813,7 +1812,6 @@
 fi; \
 $(call call-jack,$(PRIVATE_JACK_VM_ARGS),$(PRIVATE_JACK_EXTRA_ARGS)) \
     $(strip $(PRIVATE_JACK_FLAGS)) \
-    $(strip $(PRIVATE_JACK_DEBUG_FLAGS)) \
     $(if $(NO_OPTIMIZE_DX), \
         -D jack.dex.optimize="false") \
     $(if $(PRIVATE_RMTYPEDEFS), \
@@ -1893,7 +1891,6 @@
 fi; \
 $(call call-jack,$(PRIVATE_JACK_VM_ARGS),$(PRIVATE_JACK_EXTRA_ARGS)) \
     $(strip $(PRIVATE_JACK_FLAGS)) \
-    $(strip $(PRIVATE_JACK_DEBUG_FLAGS)) \
     $(if $(NO_OPTIMIZE_DX), \
         -D jack.dex.optimize="false") \
     $(addprefix --classpath ,$(strip \
diff --git a/core/host_dalvik_java_library.mk b/core/host_dalvik_java_library.mk
index 7f59272..aa700e1 100644
--- a/core/host_dalvik_java_library.mk
+++ b/core/host_dalvik_java_library.mk
@@ -45,7 +45,9 @@
     $(built_dex)
 
 # See comment in java.mk
-java_alternative_checked_module := $(full_classes_compiled_jar)
+ifndef LOCAL_CHECKED_MODULE
+LOCAL_CHECKED_MODULE := $(full_classes_compiled_jar)
+endif
 
 #######################################
 include $(BUILD_SYSTEM)/base_rules.mk
@@ -56,10 +58,6 @@
 
 include $(BUILD_SYSTEM)/java_common.mk
 
-$(full_classes_compiled_jar): PRIVATE_JAVAC_DEBUG_FLAGS := -g
-
-java_alternative_checked_module :=
-
 # The layers file allows you to enforce a layering between java packages.
 # Run build/tools/java-layers.py for more details.
 layers_file := $(addprefix $(LOCAL_PATH)/, $(LOCAL_JAVA_LAYERS_FILE))
@@ -67,7 +65,7 @@
 $(cleantarget): PRIVATE_CLEAN_FILES += $(intermediates.COMMON)
 
 $(full_classes_compiled_jar): PRIVATE_JAVA_LAYERS_FILE := $(layers_file)
-$(full_classes_compiled_jar): PRIVATE_JAVACFLAGS := $(LOCAL_JAVACFLAGS)
+$(full_classes_compiled_jar): PRIVATE_JAVACFLAGS := $(GLOBAL_JAVAC_DEBUG_FLAGS) $(LOCAL_JAVACFLAGS)
 $(full_classes_compiled_jar): PRIVATE_JAR_EXCLUDE_FILES :=
 $(full_classes_compiled_jar): PRIVATE_JAR_PACKAGES :=
 $(full_classes_compiled_jar): PRIVATE_JAR_EXCLUDE_PACKAGES :=
@@ -122,10 +120,9 @@
 $(LOCAL_INTERMEDIATE_TARGETS): \
 	PRIVATE_JACK_INCREMENTAL_DIR :=
 endif
-$(LOCAL_INTERMEDIATE_TARGETS):  PRIVATE_JACK_DEBUG_FLAGS := -g
 
 $(built_dex): PRIVATE_CLASSES_JACK := $(full_classes_jack)
-$(built_dex): PRIVATE_JACK_FLAGS := $(LOCAL_JACK_FLAGS)
+$(built_dex): PRIVATE_JACK_FLAGS := $(GLOBAL_JAVAC_DEBUG_FLAGS) $(LOCAL_JACK_FLAGS)
 $(built_dex): $(java_sources) $(java_resource_sources) $(full_jack_lib_deps) \
         $(jar_manifest_file) $(proto_java_sources_file_stamp) $(LOCAL_MODULE_MAKEFILE) \
         $(LOCAL_MODULE_MAKEFILE) $(LOCAL_ADDITIONAL_DEPENDENCIES) $(JACK_JAR) $(JACK_LAUNCHER_JAR)
diff --git a/core/host_dalvik_static_java_library.mk b/core/host_dalvik_static_java_library.mk
index 90bcc12..c6ba915 100644
--- a/core/host_dalvik_static_java_library.mk
+++ b/core/host_dalvik_static_java_library.mk
@@ -34,7 +34,7 @@
 include $(BUILD_SYSTEM)/host_java_library.mk
 # proguard is not supported
 # *.proto files are not supported
-$(full_classes_jack): PRIVATE_JACK_FLAGS := $(LOCAL_JACK_FLAGS)
+$(full_classes_jack): PRIVATE_JACK_FLAGS := $(GLOBAL_JAVAC_DEBUG_FLAGS) $(LOCAL_JACK_FLAGS)
 $(full_classes_jack): PRIVATE_JARJAR_RULES := $(LOCAL_JARJAR_RULES)
 $(full_classes_jack): \
 	PRIVATE_JACK_INTERMEDIATES_DIR := $(intermediates.COMMON)/jack-rsc
diff --git a/core/host_java_library.mk b/core/host_java_library.mk
index 8ae2e47..0a1119f 100644
--- a/core/host_java_library.mk
+++ b/core/host_java_library.mk
@@ -73,14 +73,12 @@
 full_classes_compiled_jar := $(built_javalib_jar)
 endif # LOCAL_EMMA_INSTRUMENT
 
-$(full_classes_compiled_jar): PRIVATE_JAVAC_DEBUG_FLAGS := -g
-
 # The layers file allows you to enforce a layering between java packages.
 # Run build/tools/java-layers.py for more details.
 layers_file := $(addprefix $(LOCAL_PATH)/, $(LOCAL_JAVA_LAYERS_FILE))
 
 $(full_classes_compiled_jar): PRIVATE_JAVA_LAYERS_FILE := $(layers_file)
-$(full_classes_compiled_jar): PRIVATE_JAVACFLAGS := $(LOCAL_JAVACFLAGS)
+$(full_classes_compiled_jar): PRIVATE_JAVACFLAGS := $(GLOBAL_JAVAC_DEBUG_FLAGS) $(LOCAL_JAVACFLAGS)
 $(full_classes_compiled_jar): PRIVATE_JAR_EXCLUDE_FILES :=
 $(full_classes_compiled_jar): PRIVATE_JAR_PACKAGES :=
 $(full_classes_compiled_jar): PRIVATE_JAR_EXCLUDE_PACKAGES :=
diff --git a/core/java.mk b/core/java.mk
index 2b48c0c..8972bdc 100644
--- a/core/java.mk
+++ b/core/java.mk
@@ -328,19 +328,16 @@
 # to fail except for bugs in their respective tools.  If you would
 # like to run these rules, add the "all" modifier goal to the make
 # command line.
+ifndef LOCAL_CHECKED_MODULE
 ifdef full_classes_jar
-java_alternative_checked_module := $(full_classes_compiled_jar)
-else
-java_alternative_checked_module :=
+LOCAL_CHECKED_MODULE := $(full_classes_compiled_jar)
+endif
 endif
 
 #######################################
 include $(BUILD_SYSTEM)/base_rules.mk
 #######################################
 
-java_alternative_checked_module :=
-
-
 ##########################################
 java_sources := $(addprefix $(LOCAL_PATH)/, $(filter %.java,$(LOCAL_SRC_FILES))) $(aidl_java_sources) $(logtags_java_sources) \
                 $(filter %.java,$(LOCAL_GENERATED_SOURCES))
@@ -416,7 +413,7 @@
 # This intentionally depends on java_sources, not all_java_sources.
 # Deps for generated source files must be handled separately,
 # via deps on the target that generates the sources.
-$(full_classes_compiled_jar): PRIVATE_JAVACFLAGS := $(LOCAL_JAVACFLAGS)
+$(full_classes_compiled_jar): PRIVATE_JAVACFLAGS := $(GLOBAL_JAVAC_DEBUG_FLAGS) $(LOCAL_JAVACFLAGS)
 $(full_classes_compiled_jar): PRIVATE_JAR_EXCLUDE_FILES := $(LOCAL_JAR_EXCLUDE_FILES)
 $(full_classes_compiled_jar): PRIVATE_JAR_PACKAGES := $(LOCAL_JAR_PACKAGES)
 $(full_classes_compiled_jar): PRIVATE_JAR_EXCLUDE_PACKAGES := $(LOCAL_JAR_EXCLUDE_PACKAGES)
@@ -433,8 +430,6 @@
         $(LOCAL_ADDITIONAL_DEPENDENCIES)
 	$(transform-java-to-classes.jar)
 
-$(full_classes_compiled_jar): PRIVATE_JAVAC_DEBUG_FLAGS := -g
-
 # Run jarjar if necessary, otherwise just copy the file.
 ifneq ($(strip $(LOCAL_JARJAR_RULES)),)
 $(full_classes_jarjar_jar): PRIVATE_JARJAR_RULES := $(LOCAL_JARJAR_RULES)
@@ -626,8 +621,6 @@
 endif
 
 ifdef full_classes_jar
-$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_JACK_DEBUG_FLAGS := -g
-
 ifdef LOCAL_PROGUARD_ENABLED
 
 ifndef LOCAL_JACK_PROGUARD_FLAGS
@@ -643,7 +636,7 @@
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_JACK_PROGUARD_FLAGS :=
 endif # LOCAL_PROGUARD_ENABLED defined
 
-$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_JACK_FLAGS := $(LOCAL_JACK_FLAGS)
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_JACK_FLAGS := $(GLOBAL_JAVAC_DEBUG_FLAGS) $(LOCAL_JACK_FLAGS)
 
 jack_all_deps := $(java_sources) $(java_resource_sources) $(full_jack_lib_deps) \
         $(jar_manifest_file) $(layers_file) $(RenderScript_file_stamp) $(proguard_flag_files) \