diff --git a/core/binary.mk b/core/binary.mk
index ce0fd70..791623b 100644
--- a/core/binary.mk
+++ b/core/binary.mk
@@ -13,10 +13,6 @@
   ifdef LOCAL_IS_HOST_MODULE
     $(error $(LOCAL_PATH): LOCAL_SDK_VERSION cannot be used in host module)
   endif
-  ifneq ($(filter-out SHARED_LIBRARIES STATIC_LIBRARIES,$(LOCAL_MODULE_CLASS)),)
-    $(error $(LOCAL_PATH): NDK can only be used to build target shared/static libraries, \
-          while your module is of class $(LOCAL_MODULE_CLASS))
-  endif
   my_ndk_source_root := $(HISTORICAL_NDK_VERSIONS_ROOT)/current/sources
   my_ndk_version_root := $(HISTORICAL_NDK_VERSIONS_ROOT)/current/platforms/android-$(LOCAL_SDK_VERSION)/arch-$(TARGET_ARCH)
 
diff --git a/core/build_id.mk b/core/build_id.mk
index 2c02b85..40bb35d 100644
--- a/core/build_id.mk
+++ b/core/build_id.mk
@@ -1,4 +1,3 @@
-
 #
 # Copyright (C) 2008 The Android Open Source Project
 #
@@ -14,9 +13,20 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
+
+#
+# Defines branch-specific values.
+#
+
 # BUILD_ID is usually used to specify the branch name
 # (like "MAIN") or a branch name and a release candidate
-# (like "CRB01").  It must be a single word, and is
+# (like "TC1-RC5").  It must be a single word, and is
 # capitalized by convention.
+#
+BUILD_ID := MASTER
 
-export BUILD_ID=JOP09
+# DISPLAY_BUILD_NUMBER should only be set for development branches,
+# If set, the BUILD_NUMBER (cl) is appended to the BUILD_ID for
+# a more descriptive BUILD_ID_DISPLAY, otherwise BUILD_ID_DISPLAY
+# is the same as BUILD_ID
+DISPLAY_BUILD_NUMBER := true
diff --git a/core/combo/TARGET_linux-arm.mk b/core/combo/TARGET_linux-arm.mk
index 00dc0e8..854037d 100644
--- a/core/combo/TARGET_linux-arm.mk
+++ b/core/combo/TARGET_linux-arm.mk
@@ -276,10 +276,10 @@
 	-Wl,--gc-sections \
 	-Wl,-z,nocopyreloc \
 	-o $@ \
-	$(TARGET_GLOBAL_LD_DIRS) \
+	$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
 	-Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \
 	$(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \
-	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(TARGET_CRTBEGIN_DYNAMIC_O)) \
+	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_DYNAMIC_O)) \
 	$(PRIVATE_ALL_OBJECTS) \
 	-Wl,--whole-archive \
 	$(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \
@@ -287,20 +287,20 @@
 	$(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--start-group) \
 	$(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \
 	$(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--end-group) \
-	$(TARGET_GLOBAL_LDFLAGS) \
+	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
 	$(PRIVATE_LDFLAGS) \
-	$(TARGET_FDO_LIB) \
-	$(TARGET_LIBGCC) \
-	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(TARGET_CRTEND_O))
+	$(PRIVATE_TARGET_FDO_LIB) \
+	$(PRIVATE_TARGET_LIBGCC) \
+	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O))
 endef
 
 define transform-o-to-static-executable-inner
 $(hide) $(PRIVATE_CXX) -nostdlib -Bstatic \
 	-Wl,--gc-sections \
 	-o $@ \
-	$(TARGET_GLOBAL_LD_DIRS) \
-	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(TARGET_CRTBEGIN_STATIC_O)) \
-	$(TARGET_GLOBAL_LDFLAGS) \
+	$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
+	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_STATIC_O)) \
+	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
 	$(PRIVATE_LDFLAGS) \
 	$(PRIVATE_ALL_OBJECTS) \
 	-Wl,--whole-archive \
@@ -310,8 +310,8 @@
 	-Wl,--start-group \
 	$(call normalize-target-libraries,$(filter %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \
 	$(call normalize-target-libraries,$(filter %libc_nomalloc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \
-	$(TARGET_FDO_LIB) \
-	$(TARGET_LIBGCC) \
+	$(PRIVATE_TARGET_FDO_LIB) \
+	$(PRIVATE_TARGET_LIBGCC) \
 	-Wl,--end-group \
-	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(TARGET_CRTEND_O))
+	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O))
 endef
diff --git a/core/combo/TARGET_linux-mips.mk b/core/combo/TARGET_linux-mips.mk
index 60d7e5b..b2b006a 100644
--- a/core/combo/TARGET_linux-mips.mk
+++ b/core/combo/TARGET_linux-mips.mk
@@ -81,7 +81,7 @@
 TARGET_GLOBAL_CFLAGS += \
 			$(TARGET_mips_CFLAGS) \
 			-Ulinux -U__unix -U__unix__ -Umips \
-			-fpic \
+			-fpic -fPIE\
 			-ffunction-sections \
 			-fdata-sections \
 			-funwind-tables \
@@ -243,41 +243,41 @@
 endef
 
 define transform-o-to-executable-inner
-$(hide) $(PRIVATE_CXX) -nostdlib -Bdynamic \
+$(hide) $(PRIVATE_CXX) -nostdlib -Bdynamic -fPIE -pie \
 	-Wl,-dynamic-linker,/system/bin/linker \
 	-Wl,--gc-sections \
 	-Wl,-z,nocopyreloc \
 	-o $@ \
-	$(TARGET_GLOBAL_LD_DIRS) \
+	$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
 	-Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \
 	$(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \
-	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(TARGET_CRTBEGIN_DYNAMIC_O)) \
+	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_DYNAMIC_O)) \
 	$(PRIVATE_ALL_OBJECTS) \
 	$(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--start-group) \
 	$(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \
 	$(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--end-group) \
-	$(TARGET_GLOBAL_LDFLAGS) \
+	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
 	$(PRIVATE_LDFLAGS) \
-	$(TARGET_FDO_LIB) \
-	$(TARGET_LIBGCC) \
-	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(TARGET_CRTEND_O))
+	$(PRIVATE_TARGET_FDO_LIB) \
+	$(PRIVATE_TARGET_LIBGCC) \
+	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O))
 endef
 
 define transform-o-to-static-executable-inner
 $(hide) $(PRIVATE_CXX) -nostdlib -Bstatic \
 	-Wl,--gc-sections \
 	-o $@ \
-	$(TARGET_GLOBAL_LD_DIRS) \
-	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(TARGET_CRTBEGIN_STATIC_O)) \
-	$(TARGET_GLOBAL_LDFLAGS) \
+	$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
+	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_STATIC_O)) \
+	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
 	$(PRIVATE_LDFLAGS) \
 	$(PRIVATE_ALL_OBJECTS) \
 	$(call normalize-target-libraries,$(filter-out %libc_nomalloc.a,$(filter-out %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES)))) \
 	-Wl,--start-group \
 	$(call normalize-target-libraries,$(filter %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \
 	$(call normalize-target-libraries,$(filter %libc_nomalloc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \
-	$(TARGET_FDO_LIB) \
-	$(TARGET_LIBGCC) \
+	$(PRIVATE_TARGET_FDO_LIB) \
+	$(PRIVATE_TARGET_LIBGCC) \
 	-Wl,--end-group \
-	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(TARGET_CRTEND_O))
+	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O))
 endef
diff --git a/core/combo/TARGET_linux-x86.mk b/core/combo/TARGET_linux-x86.mk
index 96577f1..0e7c17d 100644
--- a/core/combo/TARGET_linux-x86.mk
+++ b/core/combo/TARGET_linux-x86.mk
@@ -191,16 +191,16 @@
 
 define transform-o-to-executable-inner
 $(hide) $(PRIVATE_CXX) \
-	$(TARGET_GLOBAL_LDFLAGS) \
+	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
 	-nostdlib -Bdynamic \
 	-Wl,-dynamic-linker,/system/bin/linker \
 	-Wl,-z,nocopyreloc \
 	-fPIE -pie \
 	-o $@ \
-	$(TARGET_GLOBAL_LD_DIRS) \
+	$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
 	-Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \
 	$(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \
-	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(TARGET_CRTBEGIN_DYNAMIC_O)) \
+	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_DYNAMIC_O)) \
 	$(PRIVATE_ALL_OBJECTS) \
 	-Wl,--whole-archive \
 	$(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \
@@ -209,17 +209,17 @@
 	$(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \
 	$(if $(PRIVATE_GROUP_STATIC_LIBRARIES),-Wl$(comma)--end-group) \
 	$(PRIVATE_LDFLAGS) \
-	$(TARGET_LIBGCC) \
-	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(TARGET_CRTEND_O))
+	$(PRIVATE_TARGET_LIBGCC) \
+	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O))
 endef
 
 define transform-o-to-static-executable-inner
 $(hide) $(PRIVATE_CXX) \
-	$(TARGET_GLOBAL_LDFLAGS) \
+	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
 	-nostdlib -Bstatic \
 	-o $@ \
-	$(TARGET_GLOBAL_LD_DIRS) \
-	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(TARGET_CRTBEGIN_STATIC_O)) \
+	$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
+	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTBEGIN_STATIC_O)) \
 	$(PRIVATE_LDFLAGS) \
 	$(PRIVATE_ALL_OBJECTS) \
 	-Wl,--whole-archive \
@@ -227,9 +227,9 @@
 	-Wl,--no-whole-archive \
 	-Wl,--start-group \
 	$(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \
-	$(TARGET_LIBGCC) \
+	$(PRIVATE_TARGET_LIBGCC) \
 	-Wl,--end-group \
-	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(TARGET_CRTEND_O))
+	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O))
 endef
 
 # Special check for x86 NDK ABI compatibility.
diff --git a/core/definitions.mk b/core/definitions.mk
index 5600779..a6584f4 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -178,7 +178,7 @@
 define all-java-files-under
 $(patsubst ./%,%, \
   $(shell cd $(LOCAL_PATH) ; \
-          find $(1) -name "*.java" -and -not -name ".*") \
+          find -L $(1) -name "*.java" -and -not -name ".*") \
  )
 endef
 
@@ -200,7 +200,7 @@
 define all-c-files-under
 $(patsubst ./%,%, \
   $(shell cd $(LOCAL_PATH) ; \
-          find $(1) -name "*.c" -and -not -name ".*") \
+          find -L $(1) -name "*.c" -and -not -name ".*") \
  )
 endef
 
@@ -222,7 +222,7 @@
 define all-Iaidl-files-under
 $(patsubst ./%,%, \
   $(shell cd $(LOCAL_PATH) ; \
-          find $(1) -name "I*.aidl" -and -not -name ".*") \
+          find -L $(1) -name "I*.aidl" -and -not -name ".*") \
  )
 endef
 
@@ -243,7 +243,7 @@
 define all-logtags-files-under
 $(patsubst ./%,%, \
   $(shell cd $(LOCAL_PATH) ; \
-          find $(1) -name "*.logtags" -and -not -name ".*") \
+          find -L $(1) -name "*.logtags" -and -not -name ".*") \
   )
 endef
 
@@ -256,7 +256,7 @@
 define all-proto-files-under
 $(patsubst ./%,%, \
   $(shell cd $(LOCAL_PATH) ; \
-          find $(1) -name "*.proto" -and -not -name ".*") \
+          find -L $(1) -name "*.proto" -and -not -name ".*") \
   )
 endef
 
@@ -269,7 +269,7 @@
 define all-renderscript-files-under
 $(patsubst ./%,%, \
   $(shell cd $(LOCAL_PATH) ; \
-          find $(1) -name "*.rs" -and -not -name ".*") \
+          find -L $(1) -name "*.rs" -and -not -name ".*") \
   )
 endef
 
@@ -282,7 +282,7 @@
 define all-html-files-under
 $(patsubst ./%,%, \
   $(shell cd $(LOCAL_PATH) ; \
-          find $(1) -name "*.html" -and -not -name ".*") \
+          find -L $(1) -name "*.html" -and -not -name ".*") \
  )
 endef
 
@@ -301,7 +301,7 @@
 ###########################################################
 
 define find-subdir-files
-$(patsubst ./%,%,$(shell cd $(LOCAL_PATH) ; find $(1)))
+$(patsubst ./%,%,$(shell cd $(LOCAL_PATH) ; find -L $(1)))
 endef
 
 ###########################################################
@@ -314,7 +314,7 @@
 
 define find-subdir-subdir-files
 $(filter-out $(patsubst %,$(1)/%,$(3)),$(patsubst ./%,%,$(shell cd \
-            $(LOCAL_PATH) ; find $(1) -maxdepth 1 -name $(2))))
+            $(LOCAL_PATH) ; find -L $(1) -maxdepth 1 -name $(2))))
 endef
 
 ###########################################################
@@ -1259,13 +1259,11 @@
 ifneq ($(TARGET_CUSTOM_LD_COMMAND),true)
 define transform-o-to-executable-inner
 $(hide) $(PRIVATE_CXX) \
-	$(TARGET_GLOBAL_LDFLAGS) \
-	-Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \
-	$(TARGET_GLOBAL_LD_DIRS) \
+	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
+	$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
 	-Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \
 	-Wl,-rpath,\$$ORIGIN/../lib \
 	$(PRIVATE_LDFLAGS) \
-	$(TARGET_GLOBAL_LD_DIRS) \
 	$(PRIVATE_ALL_OBJECTS) \
 	-Wl,--whole-archive \
 	$(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \
diff --git a/core/executable.mk b/core/executable.mk
index baebc3b..d6f383b 100644
--- a/core/executable.mk
+++ b/core/executable.mk
@@ -26,10 +26,38 @@
 
 include $(BUILD_SYSTEM)/dynamic_binary.mk
 
+# Define PRIVATE_ variables from global vars
+my_target_global_ld_dirs := $(TARGET_GLOBAL_LD_DIRS)
+my_target_global_ldflags := $(TARGET_GLOBAL_LDFLAGS)
+my_target_fdo_lib := $(TARGET_FDO_LIB)
+my_target_libgcc := $(TARGET_LIBGCC)
+my_target_crtbegin_dynamic_o := $(TARGET_CRTBEGIN_DYNAMIC_O)
+my_target_crtbegin_static_o := $(TARGET_CRTBEGIN_STATIC_O)
+my_target_crtend_o := $(TARGET_CRTEND_O)
+ifdef LOCAL_SDK_VERSION
+# Make sure the prebuilt NDK paths are put ahead of the TARGET_GLOBAL_LD_DIRS,
+# so we don't have race condition when the system libraries (such as libc, libstdc++) are also built in the tree.
+my_target_global_ld_dirs := \
+    $(addprefix -L, $(patsubst %/,%,$(dir $(my_ndk_stl_shared_lib_fullpath))) \
+    $(my_ndk_version_root)/usr/lib) \
+    $(my_target_global_ld_dirs)
+my_target_global_ldflags := $(my_ndk_stl_shared_lib) $(my_target_global_ldflags)
+my_target_crtbegin_dynamic_o := $(wildcard $(my_ndk_version_root)/usr/lib/crtbegin_dynamic.o)
+my_target_crtbegin_static_o := $(wildcard $(my_ndk_version_root)/usr/lib/crtbegin_static.o)
+my_target_crtend_o := $(wildcard $(my_ndk_version_root)/usr/lib/crtend_android.o)
+endif
+$(linked_module): PRIVATE_TARGET_GLOBAL_LD_DIRS := $(my_target_global_ld_dirs)
+$(linked_module): PRIVATE_TARGET_GLOBAL_LDFLAGS := $(my_target_global_ldflags)
+$(linked_module): PRIVATE_TARGET_FDO_LIB := $(my_target_fdo_lib)
+$(linked_module): PRIVATE_TARGET_LIBGCC := $(my_target_libgcc)
+$(linked_module): PRIVATE_TARGET_CRTBEGIN_DYNAMIC_O := $(my_target_crtbegin_dynamic_o)
+$(linked_module): PRIVATE_TARGET_CRTBEGIN_STATIC_O := $(my_target_crtbegin_static_o)
+$(linked_module): PRIVATE_TARGET_CRTEND_O := $(my_target_crtend_o)
+
 ifeq ($(LOCAL_FORCE_STATIC_EXECUTABLE),true)
-$(linked_module): $(TARGET_CRTBEGIN_STATIC_O) $(all_objects) $(all_libraries) $(TARGET_CRTEND_O)
+$(linked_module): $(my_target_crtbegin_static_o) $(all_objects) $(all_libraries) $(my_target_crtend_o)
 	$(transform-o-to-static-executable)
-else	
-$(linked_module): $(TARGET_CRTBEGIN_DYNAMIC_O) $(all_objects) $(all_libraries) $(TARGET_CRTEND_O)
+else
+$(linked_module): $(my_target_crtbegin_dynamic_o) $(all_objects) $(all_libraries) $(my_target_crtend_o)
 	$(transform-o-to-executable)
 endif
diff --git a/core/main.mk b/core/main.mk
index 87488f4..ffc1501 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -738,7 +738,6 @@
 .PHONY: files
 files: prebuilt \
         $(modules_to_install) \
-        $(modules_to_check) \
         $(INSTALLED_ANDROID_INFO_TXT_TARGET)
 
 # -------------------------------------------------------------------
diff --git a/core/product_config.mk b/core/product_config.mk
index 75df954..e05907d 100644
--- a/core/product_config.mk
+++ b/core/product_config.mk
@@ -220,7 +220,7 @@
 else
 # Import just the current product.
 ifndef current_product_makefile
-$(error Cannot locate config makefile for product "$(TARGET_PRODUCT)")
+$(error Can not locate config makefile for product "$(TARGET_PRODUCT)")
 endif
 ifneq (1,$(words $(current_product_makefile)))
 $(error Product "$(TARGET_PRODUCT)" ambiguous: matches $(current_product_makefile))