diff --git a/core/build_id.mk b/core/build_id.mk
index d5a94e4..0e8e2cf 100644
--- a/core/build_id.mk
+++ b/core/build_id.mk
@@ -18,4 +18,4 @@
 # (like "CRB01").  It must be a single word, and is
 # capitalized by convention.
 
-export BUILD_ID=MRA16G
+export BUILD_ID=MASTER
diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index 7b3f1c5..076fb78 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -141,6 +141,7 @@
 LOCAL_PROTOC_FLAGS:=
 LOCAL_PROTO_JAVA_OUTPUT_PARAMS:=
 LOCAL_NO_CRT:=
+LOCAL_NO_LIBGCC:=
 LOCAL_PROPRIETARY_MODULE:=
 LOCAL_OEM_MODULE:=
 LOCAL_ODM_MODULE:=
diff --git a/core/definitions.mk b/core/definitions.mk
index fcd5c1a..78b0a39 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -2026,13 +2026,23 @@
 
 endef
 
+# For apps_only build, don't uncompress/page-align the jni libraries,
+# because the apk may be run on older platforms that don't support loading jni directly from apk.
+ifdef TARGET_BUILD_APPS
+JNI_COMPRESS_FLAGS :=
+ZIPALIGN_PAGE_ALIGN_FLAGS :=
+else
+JNI_COMPRESS_FLAGS := -0
+ZIPALIGN_PAGE_ALIGN_FLAGS := -p
+endif
+
 define add-jni-shared-libs-to-package
 $(hide) rm -rf $(dir $@)lib
 $(hide) mkdir -p $(addprefix $(dir $@)lib/,$(PRIVATE_JNI_SHARED_LIBRARIES_ABI))
 $(foreach abi,$(PRIVATE_JNI_SHARED_LIBRARIES_ABI),\
   $(call _add-jni-shared-libs-to-package-per-abi,$(abi),\
     $(patsubst $(abi):%,%,$(filter $(abi):%,$(PRIVATE_JNI_SHARED_LIBRARIES)))))
-$(hide) (cd $(dir $@) && zip -r -0 $(notdir $@) lib)
+$(hide) (cd $(dir $@) && zip -r $(JNI_COMPRESS_FLAGS) $(notdir $@) lib)
 $(hide) rm -rf $(dir $@)lib
 endef
 
@@ -2078,7 +2088,8 @@
 define align-package
 $(hide) mv $@ $@.unaligned
 $(hide) $(ZIPALIGN) \
-    -f -p \
+    -f \
+    $(ZIPALIGN_PAGE_ALIGN_FLAGS) \
     4 \
     $@.unaligned $@.aligned
 $(hide) mv $@.aligned $@
diff --git a/core/executable_internal.mk b/core/executable_internal.mk
index 2684d51..cdaf293 100644
--- a/core/executable_internal.mk
+++ b/core/executable_internal.mk
@@ -37,7 +37,11 @@
 my_target_global_ld_dirs := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_GLOBAL_LD_DIRS)
 my_target_libprofile_rt := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_LIBPROFILE_RT)
 my_target_libgcov := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_LIBGCOV)
+ifeq ($(LOCAL_NO_LIBGCC),true)
+my_target_libgcc :=
+else
 my_target_libgcc := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_LIBGCC)
+endif
 my_target_libatomic := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_LIBATOMIC)
 my_target_crtbegin_dynamic_o := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_CRTBEGIN_DYNAMIC_O)
 my_target_crtbegin_static_o := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_CRTBEGIN_STATIC_O)
diff --git a/core/pathmap.mk b/core/pathmap.mk
index 87d3729..59c9be2 100644
--- a/core/pathmap.mk
+++ b/core/pathmap.mk
@@ -144,3 +144,18 @@
     android-support-multidex \
     android-support-multidex-instrumentation
 
+#
+# A list of all documented source roots under frameworks/data-binding.
+#
+FRAMEWORKS_DATA_BINDING_SUBDIRS := \
+        baseLibrary/src/main \
+        library/src/main \
+        library/src/doc
+
+#
+# A version of FRAMEWORKS_DATA_BINDING_SUBDIRS that is expanded to full paths from
+# the root of the tree.
+#
+FRAMEWORKS_DATA_BINDING_JAVA_SRC_DIRS := \
+	$(addprefix frameworks/data-binding/,$(FRAMEWORKS_DATA_BINDING_SUBDIRS))
+
diff --git a/core/shared_library_internal.mk b/core/shared_library_internal.mk
index 2487fbb0..e21cf5d 100644
--- a/core/shared_library_internal.mk
+++ b/core/shared_library_internal.mk
@@ -42,7 +42,11 @@
 my_target_global_ld_dirs := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_GLOBAL_LD_DIRS)
 my_target_libprofile_rt := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_LIBPROFILE_RT)
 my_target_libgcov := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_LIBGCOV)
+ifeq ($(LOCAL_NO_LIBGCC),true)
+my_target_libgcc :=
+else
 my_target_libgcc := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_LIBGCC)
+endif
 my_target_libatomic := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_LIBATOMIC)
 my_target_crtbegin_so_o := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_CRTBEGIN_SO_O)
 my_target_crtend_so_o := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_CRTEND_SO_O)